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Re: [patch] win32/buildext.pl to handle inclusions and not just exclusions
[perl5.git] / util.c
CommitLineData
a0d0e21e 1/* util.c
a687059c 2 *
4bb101f2 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
b94e2f88 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
a687059c 5 *
d48672a2
LW		 6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8d063cd8 8 *
8d063cd8 9 */
a0d0e21e
LW		 10
11/*
12 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
13 * not content." --Gandalf
14 */
8d063cd8 15
166f8a29
DM		 16/* This file contains assorted utility routines.
17 * Which is a polite way of saying any stuff that people couldn't think of
18 * a better place for. Amongst other things, it includes the warning and
19 * dieing stuff, plus wrappers for malloc code.
20 */
21
8d063cd8 22#include "EXTERN.h"
864dbfa3 23#define PERL_IN_UTIL_C
8d063cd8 24#include "perl.h"
62b28dd9 25
64ca3a65 26#ifndef PERL_MICRO
a687059c 27#include <signal.h>
36477c24 28#ifndef SIG_ERR
29# define SIG_ERR ((Sighandler_t) -1)
30#endif
64ca3a65 31#endif
36477c24 32
172d2248
OS		 33#ifdef __Lynx__
34/* Missing protos on LynxOS */
35int putenv(char *);
36#endif
37
ff68c719 38#ifdef I_SYS_WAIT
39# include <sys/wait.h>
40#endif
41
868439a2
JH		 42#ifdef HAS_SELECT
43# ifdef I_SYS_SELECT
44# include <sys/select.h>
45# endif
46#endif
47
8d063cd8 48#define FLUSH
8d063cd8 49
16cebae2
GS		 50#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
51# define FD_CLOEXEC 1 /* NeXT needs this */
52#endif
53
a687059c
LW		 54/* NOTE: Do not call the next three routines directly. Use the macros
55 * in handy.h, so that we can easily redefine everything to do tracking of
56 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 57 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW		 58 */
59
ca8d8976
NC		 60static char *
61S_write_no_mem(pTHX)
62{
97aff369 63 dVAR;
ca8d8976
NC		 64 /* Can't use PerlIO to write as it allocates memory */
65 PerlLIO_write(PerlIO_fileno(Perl_error_log),
66 PL_no_mem, strlen(PL_no_mem));
67 my_exit(1);
1f440eb2 68 NORETURN_FUNCTION_END;
ca8d8976
NC		 69}
70
26fa51c3
AMS		 71/* paranoid version of system's malloc() */
72
bd4080b3 73Malloc_t
4f63d024 74Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 75{
54aff467 76 dTHX;
bd4080b3 77 Malloc_t ptr;
55497cff 78#ifdef HAS_64K_LIMIT
62b28dd9 79 if (size > 0xffff) {
bf49b057 80 PerlIO_printf(Perl_error_log,
16cebae2 81 "Allocation too large: %lx\n", size) FLUSH;
54aff467 82 my_exit(1);
62b28dd9 83 }
55497cff 84#endif /* HAS_64K_LIMIT */
e8dda941
JD		 85#ifdef PERL_TRACK_MEMPOOL
86 size += sTHX;
87#endif
34de22dd
LW		 88#ifdef DEBUGGING
89 if ((long)size < 0)
4f63d024 90 Perl_croak_nocontext("panic: malloc");
34de22dd 91#endif
12ae5dfc 92 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 93 PERL_ALLOC_CHECK(ptr);
97835f67 94 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
bd61b366 95 if (ptr != NULL) {
e8dda941 96#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC		 97 struct perl_memory_debug_header *const header
98 = (struct perl_memory_debug_header *)ptr;
9a083ecf
NC		 99#endif
100
101#ifdef PERL_POISON
7e337ee0 102 PoisonNew(((char *)ptr), size, char);
9a083ecf 103#endif
7cb608b5 104
9a083ecf 105#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC		 106 header->interpreter = aTHX;
107 /* Link us into the list. */
108 header->prev = &PL_memory_debug_header;
109 header->next = PL_memory_debug_header.next;
110 PL_memory_debug_header.next = header;
111 header->next->prev = header;
cd1541b2 112# ifdef PERL_POISON
7cb608b5 113 header->size = size;
cd1541b2 114# endif
e8dda941
JD		 115 ptr = (Malloc_t)((char*)ptr+sTHX);
116#endif
8d063cd8 117 return ptr;
e8dda941 118}
3280af22 119 else if (PL_nomemok)
bd61b366 120 return NULL;
8d063cd8 121 else {
0bd48802 122 return write_no_mem();
8d063cd8
LW		 123 }
124 /*NOTREACHED*/
125}
126
f2517201 127/* paranoid version of system's realloc() */
8d063cd8 128
bd4080b3 129Malloc_t
4f63d024 130Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 131{
54aff467 132 dTHX;
bd4080b3 133 Malloc_t ptr;
9a34ef1d 134#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 135 Malloc_t PerlMem_realloc();
ecfc5424 136#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 137
a1d180c4 138#ifdef HAS_64K_LIMIT
5f05dabc 139 if (size > 0xffff) {
bf49b057 140 PerlIO_printf(Perl_error_log,
5f05dabc 141 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 142 my_exit(1);
5f05dabc 143 }
55497cff 144#endif /* HAS_64K_LIMIT */
7614df0c 145 if (!size) {
f2517201 146 safesysfree(where);
7614df0c
JD		 147 return NULL;
148 }
149
378cc40b 150 if (!where)
f2517201 151 return safesysmalloc(size);
e8dda941
JD		 152#ifdef PERL_TRACK_MEMPOOL
153 where = (Malloc_t)((char*)where-sTHX);
154 size += sTHX;
7cb608b5
NC		 155 {
156 struct perl_memory_debug_header *const header
157 = (struct perl_memory_debug_header *)where;
158
159 if (header->interpreter != aTHX) {
160 Perl_croak_nocontext("panic: realloc from wrong pool");
161 }
162 assert(header->next->prev == header);
163 assert(header->prev->next == header);
cd1541b2 164# ifdef PERL_POISON
7cb608b5
NC		 165 if (header->size > size) {
166 const MEM_SIZE freed_up = header->size - size;
167 char *start_of_freed = ((char *)where) + size;
7e337ee0 168 PoisonFree(start_of_freed, freed_up, char);
7cb608b5
NC		 169 }
170 header->size = size;
cd1541b2 171# endif
7cb608b5 172 }
e8dda941 173#endif
34de22dd
LW		 174#ifdef DEBUGGING
175 if ((long)size < 0)
4f63d024 176 Perl_croak_nocontext("panic: realloc");
34de22dd 177#endif
12ae5dfc 178 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 179 PERL_ALLOC_CHECK(ptr);
a1d180c4 180
97835f67
JH		 181 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
182 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
79072805 183
bd61b366 184 if (ptr != NULL) {
e8dda941 185#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC		 186 struct perl_memory_debug_header *const header
187 = (struct perl_memory_debug_header *)ptr;
188
9a083ecf
NC		 189# ifdef PERL_POISON
190 if (header->size < size) {
191 const MEM_SIZE fresh = size - header->size;
192 char *start_of_fresh = ((char *)ptr) + size;
7e337ee0 193 PoisonNew(start_of_fresh, fresh, char);
9a083ecf
NC		 194 }
195# endif
196
7cb608b5
NC		 197 header->next->prev = header;
198 header->prev->next = header;
199
e8dda941
JD		 200 ptr = (Malloc_t)((char*)ptr+sTHX);
201#endif
8d063cd8 202 return ptr;
e8dda941 203 }
3280af22 204 else if (PL_nomemok)
bd61b366 205 return NULL;
8d063cd8 206 else {
0bd48802 207 return write_no_mem();
8d063cd8
LW		 208 }
209 /*NOTREACHED*/
210}
211
f2517201 212/* safe version of system's free() */
8d063cd8 213
54310121 214Free_t
4f63d024 215Perl_safesysfree(Malloc_t where)
8d063cd8 216{
e8dda941 217#if defined(PERL_IMPLICIT_SYS) || defined(PERL_TRACK_MEMPOOL)
54aff467 218 dTHX;
97aff369
JH		 219#else
220 dVAR;
155aba94 221#endif
97835f67 222 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 223 if (where) {
e8dda941
JD		 224#ifdef PERL_TRACK_MEMPOOL
225 where = (Malloc_t)((char*)where-sTHX);
cd1541b2 226 {
7cb608b5
NC		 227 struct perl_memory_debug_header *const header
228 = (struct perl_memory_debug_header *)where;
229
230 if (header->interpreter != aTHX) {
231 Perl_croak_nocontext("panic: free from wrong pool");
232 }
233 if (!header->prev) {
cd1541b2
NC		 234 Perl_croak_nocontext("panic: duplicate free");
235 }
7cb608b5
NC		 236 if (!(header->next) || header->next->prev != header
237 || header->prev->next != header) {
238 Perl_croak_nocontext("panic: bad free");
cd1541b2 239 }
7cb608b5
NC		 240 /* Unlink us from the chain. */
241 header->next->prev = header->prev;
242 header->prev->next = header->next;
243# ifdef PERL_POISON
7e337ee0 244 PoisonNew(where, header->size, char);
cd1541b2 245# endif
7cb608b5
NC		 246 /* Trigger the duplicate free warning. */
247 header->next = NULL;
248 }
e8dda941 249#endif
6ad3d225 250 PerlMem_free(where);
378cc40b 251 }
8d063cd8
LW		 252}
253
f2517201 254/* safe version of system's calloc() */
1050c9ca 255
bd4080b3 256Malloc_t
4f63d024 257Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 258{
54aff467 259 dTHX;
bd4080b3 260 Malloc_t ptr;
1050c9ca 261
55497cff 262#ifdef HAS_64K_LIMIT
5f05dabc 263 if (size * count > 0xffff) {
bf49b057 264 PerlIO_printf(Perl_error_log,
5f05dabc 265 "Allocation too large: %lx\n", size * count) FLUSH;
54aff467 266 my_exit(1);
5f05dabc 267 }
55497cff 268#endif /* HAS_64K_LIMIT */
1050c9ca 269#ifdef DEBUGGING
270 if ((long)size < 0 || (long)count < 0)
4f63d024 271 Perl_croak_nocontext("panic: calloc");
1050c9ca 272#endif
0b7c1c42 273 size *= count;
e8dda941
JD		 274#ifdef PERL_TRACK_MEMPOOL
275 size += sTHX;
276#endif
12ae5dfc 277 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 278 PERL_ALLOC_CHECK(ptr);
97835f67 279 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)size));
bd61b366 280 if (ptr != NULL) {
1050c9ca 281 memset((void*)ptr, 0, size);
e8dda941 282#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC		 283 {
284 struct perl_memory_debug_header *const header
285 = (struct perl_memory_debug_header *)ptr;
286
287 header->interpreter = aTHX;
288 /* Link us into the list. */
289 header->prev = &PL_memory_debug_header;
290 header->next = PL_memory_debug_header.next;
291 PL_memory_debug_header.next = header;
292 header->next->prev = header;
cd1541b2 293# ifdef PERL_POISON
7cb608b5 294 header->size = size;
cd1541b2 295# endif
7cb608b5
NC		 296 ptr = (Malloc_t)((char*)ptr+sTHX);
297 }
e8dda941 298#endif
1050c9ca 299 return ptr;
300 }
3280af22 301 else if (PL_nomemok)
bd61b366 302 return NULL;
0bd48802 303 return write_no_mem();
1050c9ca 304}
305
cae6d0e5
GS		 306/* These must be defined when not using Perl's malloc for binary
307 * compatibility */
308
309#ifndef MYMALLOC
310
311Malloc_t Perl_malloc (MEM_SIZE nbytes)
312{
313 dTHXs;
077a72a9 314 return (Malloc_t)PerlMem_malloc(nbytes);
cae6d0e5
GS		 315}
316
317Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
318{
319 dTHXs;
077a72a9 320 return (Malloc_t)PerlMem_calloc(elements, size);
cae6d0e5
GS		 321}
322
323Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
324{
325 dTHXs;
077a72a9 326 return (Malloc_t)PerlMem_realloc(where, nbytes);
cae6d0e5
GS		 327}
328
329Free_t Perl_mfree (Malloc_t where)
330{
331 dTHXs;
332 PerlMem_free(where);
333}
334
335#endif
336
8d063cd8
LW		 337/* copy a string up to some (non-backslashed) delimiter, if any */
338
339char *
e1ec3a88 340Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
8d063cd8 341{
fc36a67e 342 register I32 tolen;
96a5add6 343 PERL_UNUSED_CONTEXT;
fc36a67e 344 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW		 345 if (*from == '\\') {
346 if (from[1] == delim)
347 from++;
fc36a67e 348 else {
349 if (to < toend)
350 *to++ = *from;
351 tolen++;
352 from++;
353 }
378cc40b 354 }
bedebaa5 355 else if (*from == delim)
8d063cd8 356 break;
fc36a67e 357 if (to < toend)
358 *to++ = *from;
8d063cd8 359 }
bedebaa5
CS		 360 if (to < toend)
361 *to = '\0';
fc36a67e 362 *retlen = tolen;
73d840c0 363 return (char *)from;
8d063cd8
LW		 364}
365
366/* return ptr to little string in big string, NULL if not found */
378cc40b 367/* This routine was donated by Corey Satten. */
8d063cd8
LW		 368
369char *
864dbfa3 370Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 371{
79072805 372 register I32 first;
96a5add6 373 PERL_UNUSED_CONTEXT;
378cc40b 374
a687059c 375 if (!little)
08105a92 376 return (char*)big;
a687059c 377 first = *little++;
378cc40b 378 if (!first)
08105a92 379 return (char*)big;
378cc40b 380 while (*big) {
66a1b24b 381 register const char *s, *x;
378cc40b
LW		 382 if (*big++ != first)
383 continue;
384 for (x=big,s=little; *s; /**/ ) {
385 if (!*x)
bd61b366 386 return NULL;
4fc877ac 387 if (*s != *x)
378cc40b 388 break;
4fc877ac
AL		 389 else {
390 s++;
391 x++;
378cc40b
LW		 392 }
393 }
394 if (!*s)
08105a92 395 return (char*)(big-1);
378cc40b 396 }
bd61b366 397 return NULL;
378cc40b 398}
8d063cd8 399
a687059c
LW		 400/* same as instr but allow embedded nulls */
401
402char *
4c8626be 403Perl_ninstr(pTHX_ const char *big, const char *bigend, const char *little, const char *lend)
8d063cd8 404{
96a5add6 405 PERL_UNUSED_CONTEXT;
4c8626be
GA		 406 if (little >= lend)
407 return (char*)big;
408 {
409 char first = *little++;
410 const char *s, *x;
411 bigend -= lend - little;
412 OUTER:
413 while (big <= bigend) {
414 if (*big++ != first)
415 goto OUTER;
416 for (x=big,s=little; s < lend; x++,s++) {
417 if (*s != *x)
418 goto OUTER;
419 }
420 return (char*)(big-1);
421 }
378cc40b 422 }
bd61b366 423 return NULL;
a687059c
LW		 424}
425
426/* reverse of the above--find last substring */
427
428char *
864dbfa3 429Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 430{
08105a92 431 register const char *bigbeg;
e1ec3a88 432 register const I32 first = *little;
7452cf6a 433 register const char * const littleend = lend;
96a5add6 434 PERL_UNUSED_CONTEXT;
a687059c 435
260d78c9 436 if (little >= littleend)
08105a92 437 return (char*)bigend;
a687059c
LW		 438 bigbeg = big;
439 big = bigend - (littleend - little++);
440 while (big >= bigbeg) {
66a1b24b 441 register const char *s, *x;
a687059c
LW		 442 if (*big-- != first)
443 continue;
444 for (x=big+2,s=little; s < littleend; /**/ ) {
4fc877ac 445 if (*s != *x)
a687059c 446 break;
4fc877ac
AL		 447 else {
448 x++;
449 s++;
a687059c
LW		 450 }
451 }
452 if (s >= littleend)
08105a92 453 return (char*)(big+1);
378cc40b 454 }
bd61b366 455 return NULL;
378cc40b 456}
a687059c 457
cf93c79d
IZ		 458#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
459
460/* As a space optimization, we do not compile tables for strings of length
461 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
462 special-cased in fbm_instr().
463
464 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
465
954c1994 466/*
ccfc67b7
JH		 467=head1 Miscellaneous Functions
468
954c1994
GS		 469=for apidoc fbm_compile
470
471Analyses the string in order to make fast searches on it using fbm_instr()
472-- the Boyer-Moore algorithm.
473
474=cut
475*/
476
378cc40b 477void
7506f9c3 478Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 479{
97aff369 480 dVAR;
0d46e09a 481 register const U8 *s;
79072805 482 register U32 i;
0b71040e 483 STRLEN len;
79072805
LW		 484 I32 rarest = 0;
485 U32 frequency = 256;
486
c517dc2b 487 if (flags & FBMcf_TAIL) {
890ce7af 488 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
396482e1 489 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
c517dc2b
JH		 490 if (mg && mg->mg_len >= 0)
491 mg->mg_len++;
492 }
9cbe880b 493 s = (U8*)SvPV_force_mutable(sv, len);
862a34c6 494 SvUPGRADE(sv, SVt_PVBM);
d1be9408 495 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 496 return;
02128f11 497 if (len > 2) {
9cbe880b 498 const unsigned char *sb;
66a1b24b 499 const U8 mlen = (len>255) ? 255 : (U8)len;
890ce7af 500 register U8 *table;
cf93c79d 501
7506f9c3 502 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
9cbe880b 503 table = (unsigned char*)(SvPVX_mutable(sv) + len + FBM_TABLE_OFFSET);
7506f9c3
GS		 504 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
505 memset((void*)table, mlen, 256);
506 table[-1] = (U8)flags;
02128f11 507 i = 0;
7506f9c3 508 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ		 509 while (s >= sb) {
510 if (table[*s] == mlen)
7506f9c3 511 table[*s] = (U8)i;
cf93c79d
IZ		 512 s--, i++;
513 }
378cc40b 514 }
a0714e2c 515 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
79072805 516 SvVALID_on(sv);
378cc40b 517
9cbe880b 518 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 519 for (i = 0; i < len; i++) {
22c35a8c 520 if (PL_freq[s[i]] < frequency) {
bbce6d69 521 rarest = i;
22c35a8c 522 frequency = PL_freq[s[i]];
378cc40b
LW		 523 }
524 }
79072805 525 BmRARE(sv) = s[rarest];
eb160463 526 BmPREVIOUS(sv) = (U16)rarest;
cf93c79d
IZ		 527 BmUSEFUL(sv) = 100; /* Initial value */
528 if (flags & FBMcf_TAIL)
529 SvTAIL_on(sv);
7506f9c3
GS		 530 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
531 BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW		 532}
533
cf93c79d
IZ		 534/* If SvTAIL(littlestr), it has a fake '\n' at end. */
535/* If SvTAIL is actually due to \Z or \z, this gives false positives
536 if multiline */
537
954c1994
GS		 538/*
539=for apidoc fbm_instr
540
541Returns the location of the SV in the string delimited by C<str> and
bd61b366 542C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
954c1994
GS		 543does not have to be fbm_compiled, but the search will not be as fast
544then.
545
546=cut
547*/
548
378cc40b 549char *
864dbfa3 550Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 551{
a687059c 552 register unsigned char *s;
cf93c79d 553 STRLEN l;
9cbe880b
NC		 554 register const unsigned char *little
555 = (const unsigned char *)SvPV_const(littlestr,l);
cf93c79d 556 register STRLEN littlelen = l;
e1ec3a88 557 register const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 558
eb160463 559 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 560 if ( SvTAIL(littlestr)
eb160463 561 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 562 && (littlelen == 1
12ae5dfc 563 || (*big == *little &&
27da23d5 564 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d 565 return (char*)big;
bd61b366 566 return NULL;
cf93c79d 567 }
378cc40b 568
cf93c79d 569 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ		 570
571 if (littlelen == 1) {
572 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
573 /* Know that bigend != big. */
574 if (bigend[-1] == '\n')
575 return (char *)(bigend - 1);
576 return (char *) bigend;
577 }
578 s = big;
579 while (s < bigend) {
580 if (*s == *little)
581 return (char *)s;
582 s++;
583 }
584 if (SvTAIL(littlestr))
585 return (char *) bigend;
bd61b366 586 return NULL;
cf93c79d
IZ		 587 }
588 if (!littlelen)
589 return (char*)big; /* Cannot be SvTAIL! */
590
591 /* littlelen is 2 */
592 if (SvTAIL(littlestr) && !multiline) {
593 if (bigend[-1] == '\n' && bigend[-2] == *little)
594 return (char*)bigend - 2;
595 if (bigend[-1] == *little)
596 return (char*)bigend - 1;
bd61b366 597 return NULL;
cf93c79d
IZ		 598 }
599 {
600 /* This should be better than FBM if c1 == c2, and almost
601 as good otherwise: maybe better since we do less indirection.
602 And we save a lot of memory by caching no table. */
66a1b24b
AL		 603 const unsigned char c1 = little[0];
604 const unsigned char c2 = little[1];
cf93c79d
IZ		 605
606 s = big + 1;
607 bigend--;
608 if (c1 != c2) {
609 while (s <= bigend) {
610 if (s[0] == c2) {
611 if (s[-1] == c1)
612 return (char*)s - 1;
613 s += 2;
614 continue;
3fe6f2dc 615 }
cf93c79d
IZ		 616 next_chars:
617 if (s[0] == c1) {
618 if (s == bigend)
619 goto check_1char_anchor;
620 if (s[1] == c2)
621 return (char*)s;
622 else {
623 s++;
624 goto next_chars;
625 }
626 }
627 else
628 s += 2;
629 }
630 goto check_1char_anchor;
631 }
632 /* Now c1 == c2 */
633 while (s <= bigend) {
634 if (s[0] == c1) {
635 if (s[-1] == c1)
636 return (char*)s - 1;
637 if (s == bigend)
638 goto check_1char_anchor;
639 if (s[1] == c1)
640 return (char*)s;
641 s += 3;
02128f11 642 }
c277df42 643 else
cf93c79d 644 s += 2;
c277df42 645 }
c277df42 646 }
cf93c79d
IZ		 647 check_1char_anchor: /* One char and anchor! */
648 if (SvTAIL(littlestr) && (*bigend == *little))
649 return (char *)bigend; /* bigend is already decremented. */
bd61b366 650 return NULL;
d48672a2 651 }
cf93c79d 652 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 653 s = bigend - littlelen;
a1d180c4 654 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ		 655 /* Automatically of length > 2 */
656 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 657 {
bbce6d69 658 return (char*)s; /* how sweet it is */
7506f9c3
GS		 659 }
660 if (s[1] == *little
661 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
662 {
cf93c79d 663 return (char*)s + 1; /* how sweet it is */
7506f9c3 664 }
bd61b366 665 return NULL;
02128f11 666 }
cf93c79d 667 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
c4420975 668 char * const b = ninstr((char*)big,(char*)bigend,
cf93c79d
IZ		 669 (char*)little, (char*)little + littlelen);
670
671 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
672 /* Chop \n from littlestr: */
673 s = bigend - littlelen + 1;
7506f9c3
GS		 674 if (*s == *little
675 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
676 {
3fe6f2dc 677 return (char*)s;
7506f9c3 678 }
bd61b366 679 return NULL;
a687059c 680 }
cf93c79d 681 return b;
a687059c 682 }
a1d180c4 683
cf93c79d 684 { /* Do actual FBM. */
c4420975 685 register const unsigned char * const table = little + littlelen + FBM_TABLE_OFFSET;
0d46e09a 686 register const unsigned char *oldlittle;
cf93c79d 687
eb160463 688 if (littlelen > (STRLEN)(bigend - big))
bd61b366 689 return NULL;
cf93c79d
IZ		 690 --littlelen; /* Last char found by table lookup */
691
692 s = big + littlelen;
693 little += littlelen; /* last char */
694 oldlittle = little;
695 if (s < bigend) {
696 register I32 tmp;
697
698 top2:
7506f9c3 699 if ((tmp = table[*s])) {
cf93c79d 700 if ((s += tmp) < bigend)
62b28dd9 701 goto top2;
cf93c79d
IZ		 702 goto check_end;
703 }
704 else { /* less expensive than calling strncmp() */
66a1b24b 705 register unsigned char * const olds = s;
cf93c79d
IZ		 706
707 tmp = littlelen;
708
709 while (tmp--) {
710 if (*--s == *--little)
711 continue;
cf93c79d
IZ		 712 s = olds + 1; /* here we pay the price for failure */
713 little = oldlittle;
714 if (s < bigend) /* fake up continue to outer loop */
715 goto top2;
716 goto check_end;
717 }
718 return (char *)s;
a687059c 719 }
378cc40b 720 }
cf93c79d
IZ		 721 check_end:
722 if ( s == bigend && (table[-1] & FBMcf_TAIL)
12ae5dfc
JH		 723 && memEQ((char *)(bigend - littlelen),
724 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d 725 return (char*)bigend - littlelen;
bd61b366 726 return NULL;
378cc40b 727 }
378cc40b
LW		 728}
729
c277df42
IZ		 730/* start_shift, end_shift are positive quantities which give offsets
731 of ends of some substring of bigstr.
a0288114 732 If "last" we want the last occurrence.
c277df42 733 old_posp is the way of communication between consequent calls if
a1d180c4 734 the next call needs to find the .
c277df42 735 The initial *old_posp should be -1.
cf93c79d
IZ		 736
737 Note that we take into account SvTAIL, so one can get extra
738 optimizations if _ALL flag is set.
c277df42
IZ		 739 */
740
cf93c79d 741/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 742 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ		 743 is not supported yet. */
744
378cc40b 745char *
864dbfa3 746Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 747{
97aff369 748 dVAR;
0d46e09a 749 register const unsigned char *big;
79072805
LW		 750 register I32 pos;
751 register I32 previous;
752 register I32 first;
0d46e09a 753 register const unsigned char *little;
c277df42 754 register I32 stop_pos;
0d46e09a 755 register const unsigned char *littleend;
c277df42 756 I32 found = 0;
378cc40b 757
c277df42 758 if (*old_posp == -1
3280af22 759 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 760 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
761 cant_find:
a1d180c4 762 if ( BmRARE(littlestr) == '\n'
cf93c79d 763 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
cfd0369c 764 little = (const unsigned char *)(SvPVX_const(littlestr));
cf93c79d
IZ		 765 littleend = little + SvCUR(littlestr);
766 first = *little++;
767 goto check_tail;
768 }
bd61b366 769 return NULL;
cf93c79d
IZ		 770 }
771
cfd0369c 772 little = (const unsigned char *)(SvPVX_const(littlestr));
79072805 773 littleend = little + SvCUR(littlestr);
378cc40b 774 first = *little++;
c277df42 775 /* The value of pos we can start at: */
79072805 776 previous = BmPREVIOUS(littlestr);
cfd0369c 777 big = (const unsigned char *)(SvPVX_const(bigstr));
c277df42
IZ		 778 /* The value of pos we can stop at: */
779 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 780 if (previous + start_shift > stop_pos) {
0fe87f7c
HS		 781/*
782 stop_pos does not include SvTAIL in the count, so this check is incorrect
783 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
784*/
785#if 0
cf93c79d
IZ		 786 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
787 goto check_tail;
0fe87f7c 788#endif
bd61b366 789 return NULL;
cf93c79d 790 }
c277df42 791 while (pos < previous + start_shift) {
3280af22 792 if (!(pos += PL_screamnext[pos]))
cf93c79d 793 goto cant_find;
378cc40b 794 }
de3bb511 795 big -= previous;
bbce6d69 796 do {
0d46e09a 797 register const unsigned char *s, *x;
ef64f398 798 if (pos >= stop_pos) break;
bbce6d69 799 if (big[pos] != first)
800 continue;
801 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69 802 if (*s++ != *x++) {
803 s--;
804 break;
378cc40b 805 }
bbce6d69 806 }
c277df42
IZ		 807 if (s == littleend) {
808 *old_posp = pos;
809 if (!last) return (char *)(big+pos);
810 found = 1;
811 }
3280af22 812 } while ( pos += PL_screamnext[pos] );
a1d180c4 813 if (last && found)
cf93c79d 814 return (char *)(big+(*old_posp));
cf93c79d
IZ		 815 check_tail:
816 if (!SvTAIL(littlestr) || (end_shift > 0))
bd61b366 817 return NULL;
cf93c79d 818 /* Ignore the trailing "\n". This code is not microoptimized */
cfd0369c 819 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
cf93c79d
IZ		 820 stop_pos = littleend - little; /* Actual littlestr len */
821 if (stop_pos == 0)
822 return (char*)big;
823 big -= stop_pos;
824 if (*big == first
12ae5dfc
JH		 825 && ((stop_pos == 1) ||
826 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d 827 return (char*)big;
bd61b366 828 return NULL;
8d063cd8
LW		 829}
830
79072805 831I32
864dbfa3 832Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 833{
e1ec3a88
AL		 834 register const U8 *a = (const U8 *)s1;
835 register const U8 *b = (const U8 *)s2;
96a5add6
AL		 836 PERL_UNUSED_CONTEXT;
837
79072805 838 while (len--) {
22c35a8c 839 if (*a != *b && *a != PL_fold[*b])
bbce6d69 840 return 1;
841 a++,b++;
842 }
843 return 0;
844}
845
846I32
864dbfa3 847Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 848{
27da23d5 849 dVAR;
e1ec3a88
AL		 850 register const U8 *a = (const U8 *)s1;
851 register const U8 *b = (const U8 *)s2;
96a5add6
AL		 852 PERL_UNUSED_CONTEXT;
853
bbce6d69 854 while (len--) {
22c35a8c 855 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69 856 return 1;
857 a++,b++;
79072805
LW		 858 }
859 return 0;
860}
861
8d063cd8
LW		 862/* copy a string to a safe spot */
863
954c1994 864/*
ccfc67b7
JH		 865=head1 Memory Management
866
954c1994
GS		 867=for apidoc savepv
868
61a925ed
AMS		 869Perl's version of C<strdup()>. Returns a pointer to a newly allocated
870string which is a duplicate of C<pv>. The size of the string is
871determined by C<strlen()>. The memory allocated for the new string can
872be freed with the C<Safefree()> function.
954c1994
GS		 873
874=cut
875*/
876
8d063cd8 877char *
efdfce31 878Perl_savepv(pTHX_ const char *pv)
8d063cd8 879{
96a5add6 880 PERL_UNUSED_CONTEXT;
e90e2364 881 if (!pv)
bd61b366 882 return NULL;
66a1b24b
AL		 883 else {
884 char *newaddr;
885 const STRLEN pvlen = strlen(pv)+1;
a02a5408 886 Newx(newaddr,pvlen,char);
490a0e98 887 return memcpy(newaddr,pv,pvlen);
66a1b24b 888 }
8d063cd8
LW		 889}
890
a687059c
LW		 891/* same thing but with a known length */
892
954c1994
GS		 893/*
894=for apidoc savepvn
895
61a925ed
AMS		 896Perl's version of what C<strndup()> would be if it existed. Returns a
897pointer to a newly allocated string which is a duplicate of the first
cbf82dd0
NC		 898C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
899the new string can be freed with the C<Safefree()> function.
954c1994
GS		 900
901=cut
902*/
903
a687059c 904char *
efdfce31 905Perl_savepvn(pTHX_ const char *pv, register I32 len)
a687059c
LW		 906{
907 register char *newaddr;
96a5add6 908 PERL_UNUSED_CONTEXT;
a687059c 909
a02a5408 910 Newx(newaddr,len+1,char);
92110913 911 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 912 if (pv) {
e90e2364
NC		 913 /* might not be null terminated */
914 newaddr[len] = '\0';
07409e01 915 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS		 916 }
917 else {
07409e01 918 return (char *) ZeroD(newaddr,len+1,char);
92110913 919 }
a687059c
LW		 920}
921
05ec9bb3
NIS		 922/*
923=for apidoc savesharedpv
924
61a925ed
AMS		 925A version of C<savepv()> which allocates the duplicate string in memory
926which is shared between threads.
05ec9bb3
NIS		 927
928=cut
929*/
930char *
efdfce31 931Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 932{
e90e2364 933 register char *newaddr;
490a0e98 934 STRLEN pvlen;
e90e2364 935 if (!pv)
bd61b366 936 return NULL;
e90e2364 937
490a0e98
NC		 938 pvlen = strlen(pv)+1;
939 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364 940 if (!newaddr) {
0bd48802 941 return write_no_mem();
05ec9bb3 942 }
490a0e98 943 return memcpy(newaddr,pv,pvlen);
05ec9bb3
NIS		 944}
945
2e0de35c
NC		 946/*
947=for apidoc savesvpv
948
6832267f 949A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC		 950the passed in SV using C<SvPV()>
951
952=cut
953*/
954
955char *
956Perl_savesvpv(pTHX_ SV *sv)
957{
958 STRLEN len;
7452cf6a 959 const char * const pv = SvPV_const(sv, len);
2e0de35c
NC		 960 register char *newaddr;
961
26866f99 962 ++len;
a02a5408 963 Newx(newaddr,len,char);
07409e01 964 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 965}
05ec9bb3
NIS		 966
967
cea2e8a9 968/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 969
76e3520e 970STATIC SV *
cea2e8a9 971S_mess_alloc(pTHX)
fc36a67e 972{
97aff369 973 dVAR;
fc36a67e 974 SV *sv;
975 XPVMG *any;
976
e72dc28c 977 if (!PL_dirty)
396482e1 978 return sv_2mortal(newSVpvs(""));
e72dc28c 979
0372dbb6
GS		 980 if (PL_mess_sv)
981 return PL_mess_sv;
982
fc36a67e 983 /* Create as PVMG now, to avoid any upgrading later */
a02a5408
JC		 984 Newx(sv, 1, SV);
985 Newxz(any, 1, XPVMG);
fc36a67e 986 SvFLAGS(sv) = SVt_PVMG;
987 SvANY(sv) = (void*)any;
6136c704 988 SvPV_set(sv, NULL);
fc36a67e 989 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 990 PL_mess_sv = sv;
fc36a67e 991 return sv;
992}
993
c5be433b 994#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 995char *
996Perl_form_nocontext(const char* pat, ...)
997{
998 dTHX;
c5be433b 999 char *retval;
cea2e8a9
GS		 1000 va_list args;
1001 va_start(args, pat);
c5be433b 1002 retval = vform(pat, &args);
cea2e8a9 1003 va_end(args);
c5be433b 1004 return retval;
cea2e8a9 1005}
c5be433b 1006#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1007
7c9e965c 1008/*
ccfc67b7 1009=head1 Miscellaneous Functions
7c9e965c
JP		 1010=for apidoc form
1011
1012Takes a sprintf-style format pattern and conventional
1013(non-SV) arguments and returns the formatted string.
1014
1015 (char *) Perl_form(pTHX_ const char* pat, ...)
1016
1017can be used any place a string (char *) is required:
1018
1019 char * s = Perl_form("%d.%d",major,minor);
1020
1021Uses a single private buffer so if you want to format several strings you
1022must explicitly copy the earlier strings away (and free the copies when you
1023are done).
1024
1025=cut
1026*/
1027
8990e307 1028char *
864dbfa3 1029Perl_form(pTHX_ const char* pat, ...)
8990e307 1030{
c5be433b 1031 char *retval;
46fc3d4c 1032 va_list args;
46fc3d4c 1033 va_start(args, pat);
c5be433b 1034 retval = vform(pat, &args);
46fc3d4c 1035 va_end(args);
c5be433b
GS		 1036 return retval;
1037}
1038
1039char *
1040Perl_vform(pTHX_ const char *pat, va_list *args)
1041{
2d03de9c 1042 SV * const sv = mess_alloc();
4608196e 1043 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
e72dc28c 1044 return SvPVX(sv);
46fc3d4c 1045}
a687059c 1046
5a844595
GS		 1047#if defined(PERL_IMPLICIT_CONTEXT)
1048SV *
1049Perl_mess_nocontext(const char *pat, ...)
1050{
1051 dTHX;
1052 SV *retval;
1053 va_list args;
1054 va_start(args, pat);
1055 retval = vmess(pat, &args);
1056 va_end(args);
1057 return retval;
1058}
1059#endif /* PERL_IMPLICIT_CONTEXT */
1060
06bf62c7 1061SV *
5a844595
GS		 1062Perl_mess(pTHX_ const char *pat, ...)
1063{
1064 SV *retval;
1065 va_list args;
1066 va_start(args, pat);
1067 retval = vmess(pat, &args);
1068 va_end(args);
1069 return retval;
1070}
1071
5f66b61c
AL		 1072STATIC const COP*
1073S_closest_cop(pTHX_ const COP *cop, const OP *o)
ae7d165c 1074{
97aff369 1075 dVAR;
ae7d165c
PJ		 1076 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1077
fabdb6c0
AL		 1078 if (!o || o == PL_op)
1079 return cop;
ae7d165c
PJ		 1080
1081 if (o->op_flags & OPf_KIDS) {
5f66b61c 1082 const OP *kid;
fabdb6c0 1083 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
5f66b61c 1084 const COP *new_cop;
ae7d165c
PJ		 1085
1086 /* If the OP_NEXTSTATE has been optimised away we can still use it
1087 * the get the file and line number. */
1088
1089 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
5f66b61c 1090 cop = (const COP *)kid;
ae7d165c
PJ		 1091
1092 /* Keep searching, and return when we've found something. */
1093
1094 new_cop = closest_cop(cop, kid);
fabdb6c0
AL		 1095 if (new_cop)
1096 return new_cop;
ae7d165c
PJ		 1097 }
1098 }
1099
1100 /* Nothing found. */
1101
5f66b61c 1102 return NULL;
ae7d165c
PJ		 1103}
1104
5a844595
GS		 1105SV *
1106Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1107{
97aff369 1108 dVAR;
c4420975 1109 SV * const sv = mess_alloc();
46fc3d4c 1110
5f66b61c 1111 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
46fc3d4c 1112 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ		 1113 /*
1114 * Try and find the file and line for PL_op. This will usually be
1115 * PL_curcop, but it might be a cop that has been optimised away. We
1116 * can try to find such a cop by searching through the optree starting
1117 * from the sibling of PL_curcop.
1118 */
1119
e1ec3a88 1120 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
5f66b61c
AL		 1121 if (!cop)
1122 cop = PL_curcop;
ae7d165c
PJ		 1123
1124 if (CopLINE(cop))
ed094faf 1125 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
3aed30dc 1126 OutCopFILE(cop), (IV)CopLINE(cop));
2035c5e8 1127 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
e1ec3a88 1128 const bool line_mode = (RsSIMPLE(PL_rs) &&
95a20fc0 1129 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
57def98f 1130 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
5f66b61c 1131 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
edc2eac3
JH		 1132 line_mode ? "line" : "chunk",
1133 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1134 }
5f66b61c
AL		 1135 if (PL_dirty)
1136 sv_catpvs(sv, " during global destruction");
1137 sv_catpvs(sv, ".\n");
a687059c 1138 }
06bf62c7 1139 return sv;
a687059c
LW		 1140}
1141
7ff03255
SG		 1142void
1143Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1144{
27da23d5 1145 dVAR;
7ff03255
SG		 1146 IO *io;
1147 MAGIC *mg;
1148
1149 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1150 && (io = GvIO(PL_stderrgv))
1151 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
1152 {
1153 dSP;
1154 ENTER;
1155 SAVETMPS;
1156
1157 save_re_context();
1158 SAVESPTR(PL_stderrgv);
a0714e2c 1159 PL_stderrgv = NULL;
7ff03255
SG		 1160
1161 PUSHSTACKi(PERLSI_MAGIC);
1162
1163 PUSHMARK(SP);
1164 EXTEND(SP,2);
1165 PUSHs(SvTIED_obj((SV*)io, mg));
1166 PUSHs(sv_2mortal(newSVpvn(message, msglen)));
1167 PUTBACK;
1168 call_method("PRINT", G_SCALAR);
1169
1170 POPSTACK;
1171 FREETMPS;
1172 LEAVE;
1173 }
1174 else {
1175#ifdef USE_SFIO
1176 /* SFIO can really mess with your errno */
53c1dcc0 1177 const int e = errno;
7ff03255 1178#endif
53c1dcc0 1179 PerlIO * const serr = Perl_error_log;
7ff03255
SG		 1180
1181 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1182 (void)PerlIO_flush(serr);
1183#ifdef USE_SFIO
1184 errno = e;
1185#endif
1186 }
1187}
1188
46d9c920 1189/* Common code used by vcroak, vdie, vwarn and vwarner */
3ab1ac99 1190
46d9c920
NC		 1191STATIC bool
1192S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
63315e18 1193{
97aff369 1194 dVAR;
63315e18
NC		 1195 HV *stash;
1196 GV *gv;
1197 CV *cv;
46d9c920
NC		 1198 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1199 /* sv_2cv might call Perl_croak() or Perl_warner() */
1200 SV * const oldhook = *hook;
1201
1202 assert(oldhook);
63315e18 1203
63315e18 1204 ENTER;
46d9c920
NC		 1205 SAVESPTR(*hook);
1206 *hook = NULL;
1207 cv = sv_2cv(oldhook, &stash, &gv, 0);
63315e18
NC		 1208 LEAVE;
1209 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1210 dSP;
1211 SV *msg;
1212
1213 ENTER;
1214 save_re_context();
46d9c920
NC		 1215 if (warn) {
1216 SAVESPTR(*hook);
1217 *hook = NULL;
1218 }
1219 if (warn || message) {
63315e18
NC		 1220 msg = newSVpvn(message, msglen);
1221 SvFLAGS(msg) |= utf8;
1222 SvREADONLY_on(msg);
1223 SAVEFREESV(msg);
1224 }
1225 else {
1226 msg = ERRSV;
1227 }
1228
46d9c920 1229 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
63315e18
NC		 1230 PUSHMARK(SP);
1231 XPUSHs(msg);
1232 PUTBACK;
1233 call_sv((SV*)cv, G_DISCARD);
1234 POPSTACK;
1235 LEAVE;
46d9c920 1236 return TRUE;
63315e18 1237 }
46d9c920 1238 return FALSE;
63315e18
NC		 1239}
1240
cfd0369c 1241STATIC const char *
e07360fa
AT		 1242S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1243 I32* utf8)
1244{
1245 dVAR;
cfd0369c 1246 const char *message;
e07360fa
AT		 1247
1248 if (pat) {
890ce7af 1249 SV * const msv = vmess(pat, args);
e07360fa
AT		 1250 if (PL_errors && SvCUR(PL_errors)) {
1251 sv_catsv(PL_errors, msv);
cfd0369c 1252 message = SvPV_const(PL_errors, *msglen);
e07360fa
AT		 1253 SvCUR_set(PL_errors, 0);
1254 }
1255 else
cfd0369c 1256 message = SvPV_const(msv,*msglen);
e07360fa
AT		 1257 *utf8 = SvUTF8(msv);
1258 }
1259 else {
bd61b366 1260 message = NULL;
e07360fa
AT		 1261 }
1262
1263 DEBUG_S(PerlIO_printf(Perl_debug_log,
1264 "%p: die/croak: message = %s\ndiehook = %p\n",
1265 thr, message, PL_diehook));
1266 if (PL_diehook) {
46d9c920 1267 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
e07360fa
AT		 1268 }
1269 return message;
1270}
1271
c5be433b
GS		 1272OP *
1273Perl_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1274{
97aff369 1275 dVAR;
73d840c0 1276 const char *message;
e1ec3a88 1277 const int was_in_eval = PL_in_eval;
06bf62c7 1278 STRLEN msglen;
ff882698 1279 I32 utf8 = 0;
36477c24 1280
bf49b057 1281 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1282 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1283 thr, PL_curstack, PL_mainstack));
36477c24 1284
890ce7af 1285 message = vdie_croak_common(pat, args, &msglen, &utf8);
36477c24 1286
06bf62c7 1287 PL_restartop = die_where(message, msglen);
ff882698 1288 SvFLAGS(ERRSV) |= utf8;
bf49b057 1289 DEBUG_S(PerlIO_printf(Perl_debug_log,
7c06b590 1290 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1291 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1292 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1293 JMPENV_JUMP(3);
3280af22 1294 return PL_restartop;
36477c24 1295}
1296
c5be433b 1297#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1298OP *
1299Perl_die_nocontext(const char* pat, ...)
a687059c 1300{
cea2e8a9
GS		 1301 dTHX;
1302 OP *o;
a687059c 1303 va_list args;
cea2e8a9 1304 va_start(args, pat);
c5be433b 1305 o = vdie(pat, &args);
cea2e8a9
GS		 1306 va_end(args);
1307 return o;
1308}
c5be433b 1309#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS		 1310
1311OP *
1312Perl_die(pTHX_ const char* pat, ...)
1313{
1314 OP *o;
1315 va_list args;
1316 va_start(args, pat);
c5be433b 1317 o = vdie(pat, &args);
cea2e8a9
GS		 1318 va_end(args);
1319 return o;
1320}
1321
c5be433b
GS		 1322void
1323Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1324{
97aff369 1325 dVAR;
73d840c0 1326 const char *message;
06bf62c7 1327 STRLEN msglen;
ff882698 1328 I32 utf8 = 0;
a687059c 1329
3ab1ac99 1330 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
5a844595 1331
3280af22 1332 if (PL_in_eval) {
06bf62c7 1333 PL_restartop = die_where(message, msglen);
ff882698 1334 SvFLAGS(ERRSV) |= utf8;
6224f72b 1335 JMPENV_JUMP(3);
a0d0e21e 1336 }
84414e3e 1337 else if (!message)
cfd0369c 1338 message = SvPVx_const(ERRSV, msglen);
84414e3e 1339
7ff03255 1340 write_to_stderr(message, msglen);
f86702cc 1341 my_failure_exit();
a687059c
LW		 1342}
1343
c5be433b 1344#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1345void
cea2e8a9 1346Perl_croak_nocontext(const char *pat, ...)
a687059c 1347{
cea2e8a9 1348 dTHX;
a687059c 1349 va_list args;
cea2e8a9 1350 va_start(args, pat);
c5be433b 1351 vcroak(pat, &args);
cea2e8a9
GS		 1352 /* NOTREACHED */
1353 va_end(args);
1354}
1355#endif /* PERL_IMPLICIT_CONTEXT */
1356
954c1994 1357/*
ccfc67b7
JH		 1358=head1 Warning and Dieing
1359
954c1994
GS		 1360=for apidoc croak
1361
9983fa3c 1362This is the XSUB-writer's interface to Perl's C<die> function.
966353fd
MF		 1363Normally call this function the same way you call the C C<printf>
1364function. Calling C<croak> returns control directly to Perl,
1365sidestepping the normal C order of execution. See C<warn>.
9983fa3c
GS		 1366
1367If you want to throw an exception object, assign the object to
bd61b366 1368C<$@> and then pass C<NULL> to croak():
9983fa3c
GS		 1369
1370 errsv = get_sv("@", TRUE);
1371 sv_setsv(errsv, exception_object);
bd61b366 1372 croak(NULL);
954c1994
GS		 1373
1374=cut
1375*/
1376
cea2e8a9
GS		 1377void
1378Perl_croak(pTHX_ const char *pat, ...)
1379{
1380 va_list args;
1381 va_start(args, pat);
c5be433b 1382 vcroak(pat, &args);
cea2e8a9
GS		 1383 /* NOTREACHED */
1384 va_end(args);
1385}
1386
c5be433b
GS		 1387void
1388Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1389{
27da23d5 1390 dVAR;
06bf62c7 1391 STRLEN msglen;
53c1dcc0
AL		 1392 SV * const msv = vmess(pat, args);
1393 const I32 utf8 = SvUTF8(msv);
1394 const char * const message = SvPV_const(msv, msglen);
a687059c 1395
3280af22 1396 if (PL_warnhook) {
46d9c920 1397 if (vdie_common(message, msglen, utf8, TRUE))
20cec16a 1398 return;
748a9306 1399 }
87582a92 1400
7ff03255 1401 write_to_stderr(message, msglen);
a687059c 1402}
8d063cd8 1403
c5be433b 1404#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1405void
1406Perl_warn_nocontext(const char *pat, ...)
1407{
1408 dTHX;
1409 va_list args;
1410 va_start(args, pat);
c5be433b 1411 vwarn(pat, &args);
cea2e8a9
GS		 1412 va_end(args);
1413}
1414#endif /* PERL_IMPLICIT_CONTEXT */
1415
954c1994
GS		 1416/*
1417=for apidoc warn
1418
966353fd
MF		 1419This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1420function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS		 1421
1422=cut
1423*/
1424
cea2e8a9
GS		 1425void
1426Perl_warn(pTHX_ const char *pat, ...)
1427{
1428 va_list args;
1429 va_start(args, pat);
c5be433b 1430 vwarn(pat, &args);
cea2e8a9
GS		 1431 va_end(args);
1432}
1433
c5be433b
GS		 1434#if defined(PERL_IMPLICIT_CONTEXT)
1435void
1436Perl_warner_nocontext(U32 err, const char *pat, ...)
1437{
27da23d5 1438 dTHX;
c5be433b
GS		 1439 va_list args;
1440 va_start(args, pat);
1441 vwarner(err, pat, &args);
1442 va_end(args);
1443}
1444#endif /* PERL_IMPLICIT_CONTEXT */
1445
599cee73 1446void
864dbfa3 1447Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM		 1448{
1449 va_list args;
c5be433b
GS		 1450 va_start(args, pat);
1451 vwarner(err, pat, &args);
1452 va_end(args);
1453}
1454
1455void
1456Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1457{
27da23d5 1458 dVAR;
5f2d9966 1459 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
a3b680e6 1460 SV * const msv = vmess(pat, args);
d13b0d77 1461 STRLEN msglen;
7452cf6a 1462 const char * const message = SvPV_const(msv, msglen);
a3b680e6 1463 const I32 utf8 = SvUTF8(msv);
599cee73 1464
3aed30dc 1465 if (PL_diehook) {
63315e18 1466 assert(message);
46d9c920 1467 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
3aed30dc
HS		 1468 }
1469 if (PL_in_eval) {
1470 PL_restartop = die_where(message, msglen);
ff882698 1471 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS		 1472 JMPENV_JUMP(3);
1473 }
7ff03255 1474 write_to_stderr(message, msglen);
3aed30dc 1475 my_failure_exit();
599cee73
PM		 1476 }
1477 else {
d13b0d77 1478 Perl_vwarn(aTHX_ pat, args);
599cee73
PM		 1479 }
1480}
1481
f54ba1c2
DM		 1482/* implements the ckWARN? macros */
1483
1484bool
1485Perl_ckwarn(pTHX_ U32 w)
1486{
97aff369 1487 dVAR;
f54ba1c2
DM		 1488 return
1489 (
1490 isLEXWARN_on
1491 && PL_curcop->cop_warnings != pWARN_NONE
1492 && (
1493 PL_curcop->cop_warnings == pWARN_ALL
1494 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1495 || (unpackWARN2(w) &&
1496 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1497 || (unpackWARN3(w) &&
1498 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1499 || (unpackWARN4(w) &&
1500 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1501 )
1502 )
1503 ||
1504 (
1505 isLEXWARN_off && PL_dowarn & G_WARN_ON
1506 )
1507 ;
1508}
1509
1510/* implements the ckWARN?_d macro */
1511
1512bool
1513Perl_ckwarn_d(pTHX_ U32 w)
1514{
97aff369 1515 dVAR;
f54ba1c2
DM		 1516 return
1517 isLEXWARN_off
1518 || PL_curcop->cop_warnings == pWARN_ALL
1519 || (
1520 PL_curcop->cop_warnings != pWARN_NONE
1521 && (
1522 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1523 || (unpackWARN2(w) &&
1524 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1525 || (unpackWARN3(w) &&
1526 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1527 || (unpackWARN4(w) &&
1528 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1529 )
1530 )
1531 ;
1532}
1533
72dc9ed5
NC		 1534/* Set buffer=NULL to get a new one. */
1535STRLEN *
8ee4cf24 1536Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
72dc9ed5
NC		 1537 STRLEN size) {
1538 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
1539
1540 buffer = specialWARN(buffer) ? PerlMemShared_malloc(len_wanted)
1541 : PerlMemShared_realloc(buffer, len_wanted);
1542 buffer[0] = size;
1543 Copy(bits, (buffer + 1), size, char);
1544 return buffer;
1545}
f54ba1c2 1546
e6587932
DM		 1547/* since we've already done strlen() for both nam and val
1548 * we can use that info to make things faster than
1549 * sprintf(s, "%s=%s", nam, val)
1550 */
1551#define my_setenv_format(s, nam, nlen, val, vlen) \
1552 Copy(nam, s, nlen, char); \
1553 *(s+nlen) = '='; \
1554 Copy(val, s+(nlen+1), vlen, char); \
1555 *(s+(nlen+1+vlen)) = '\0'
1556
13b6e58c 1557#ifdef USE_ENVIRON_ARRAY
eccd403f 1558 /* VMS' my_setenv() is in vms.c */
2986a63f 1559#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1560void
e1ec3a88 1561Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1562{
27da23d5 1563 dVAR;
4efc5df6
GS		 1564#ifdef USE_ITHREADS
1565 /* only parent thread can modify process environment */
1566 if (PL_curinterp == aTHX)
1567#endif
1568 {
f2517201 1569#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1570 if (!PL_use_safe_putenv) {
f2517201 1571 /* most putenv()s leak, so we manipulate environ directly */
79072805 1572 register I32 i=setenv_getix(nam); /* where does it go? */
e6587932 1573 int nlen, vlen;
8d063cd8 1574
3280af22 1575 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW		 1576 I32 j;
1577 I32 max;
fe14fcc3
LW		 1578 char **tmpenv;
1579
1580 for (max = i; environ[max]; max++) ;
f2517201
GS		 1581 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1582 for (j=0; j<max; j++) { /* copy environment */
e1ec3a88 1583 const int len = strlen(environ[j]);
3aed30dc
HS		 1584 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1585 Copy(environ[j], tmpenv[j], len+1, char);
f2517201 1586 }
bd61b366 1587 tmpenv[max] = NULL;
fe14fcc3
LW		 1588 environ = tmpenv; /* tell exec where it is now */
1589 }
a687059c 1590 if (!val) {
f2517201 1591 safesysfree(environ[i]);
a687059c
LW		 1592 while (environ[i]) {
1593 environ[i] = environ[i+1];
1594 i++;
1595 }
1596 return;
1597 }
8d063cd8 1598 if (!environ[i]) { /* does not exist yet */
f2517201 1599 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
bd61b366 1600 environ[i+1] = NULL; /* make sure it's null terminated */
8d063cd8 1601 }
fe14fcc3 1602 else
f2517201 1603 safesysfree(environ[i]);
7ee146b1
AW		 1604 nlen = strlen(nam);
1605 vlen = strlen(val);
f2517201 1606
7ee146b1
AW		 1607 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1608 /* all that work just for this */
1609 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95
MS		 1610 } else {
1611# endif
7ee146b1 1612# if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
88f5bc07
AB		 1613# if defined(HAS_UNSETENV)
1614 if (val == NULL) {
1615 (void)unsetenv(nam);
1616 } else {
1617 (void)setenv(nam, val, 1);
1618 }
1619# else /* ! HAS_UNSETENV */
1620 (void)setenv(nam, val, 1);
1621# endif /* HAS_UNSETENV */
47dafe4d 1622# else
88f5bc07
AB		 1623# if defined(HAS_UNSETENV)
1624 if (val == NULL) {
1625 (void)unsetenv(nam);
1626 } else {
c4420975
AL		 1627 const int nlen = strlen(nam);
1628 const int vlen = strlen(val);
1629 char * const new_env =
88f5bc07
AB		 1630 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1631 my_setenv_format(new_env, nam, nlen, val, vlen);
1632 (void)putenv(new_env);
1633 }
1634# else /* ! HAS_UNSETENV */
1635 char *new_env;
c4420975
AL		 1636 const int nlen = strlen(nam);
1637 int vlen;
88f5bc07
AB		 1638 if (!val) {
1639 val = "";
1640 }
1641 vlen = strlen(val);
1642 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1643 /* all that work just for this */
1644 my_setenv_format(new_env, nam, nlen, val, vlen);
1645 (void)putenv(new_env);
1646# endif /* HAS_UNSETENV */
47dafe4d 1647# endif /* __CYGWIN__ */
50acdf95
MS		 1648#ifndef PERL_USE_SAFE_PUTENV
1649 }
1650#endif
4efc5df6 1651 }
8d063cd8
LW		 1652}
1653
2986a63f 1654#else /* WIN32 || NETWARE */
68dc0745 1655
1656void
72229eff 1657Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1658{
27da23d5 1659 dVAR;
ac5c734f 1660 register char *envstr;
e1ec3a88
AL		 1661 const int nlen = strlen(nam);
1662 int vlen;
e6587932 1663
ac5c734f
GS		 1664 if (!val) {
1665 val = "";
1666 }
e6587932 1667 vlen = strlen(val);
a02a5408 1668 Newx(envstr, nlen+vlen+2, char);
e6587932 1669 my_setenv_format(envstr, nam, nlen, val, vlen);
ac5c734f
GS		 1670 (void)PerlEnv_putenv(envstr);
1671 Safefree(envstr);
3e3baf6d
TB		 1672}
1673
2986a63f 1674#endif /* WIN32 || NETWARE */
3e3baf6d 1675
2f42fcb0 1676#ifndef PERL_MICRO
3e3baf6d 1677I32
e1ec3a88 1678Perl_setenv_getix(pTHX_ const char *nam)
3e3baf6d 1679{
53c1dcc0 1680 register I32 i;
0d46e09a 1681 register const I32 len = strlen(nam);
96a5add6 1682 PERL_UNUSED_CONTEXT;
3e3baf6d
TB		 1683
1684 for (i = 0; environ[i]; i++) {
1685 if (
1686#ifdef WIN32
1687 strnicmp(environ[i],nam,len) == 0
1688#else
1689 strnEQ(environ[i],nam,len)
1690#endif
1691 && environ[i][len] == '=')
1692 break; /* strnEQ must come first to avoid */
1693 } /* potential SEGV's */
1694 return i;
68dc0745 1695}
2f42fcb0 1696#endif /* !PERL_MICRO */
68dc0745 1697
ed79a026 1698#endif /* !VMS && !EPOC*/
378cc40b 1699
16d20bd9 1700#ifdef UNLINK_ALL_VERSIONS
79072805 1701I32
6e732051 1702Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 1703{
79072805 1704 I32 i;
378cc40b 1705
6ad3d225 1706 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW		 1707 return i ? 0 : -1;
1708}
1709#endif
1710
7a3f2258 1711/* this is a drop-in replacement for bcopy() */
2253333f 1712#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1713char *
7a3f2258 1714Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b 1715{
2d03de9c 1716 char * const retval = to;
378cc40b 1717
7c0587c8
LW		 1718 if (from - to >= 0) {
1719 while (len--)
1720 *to++ = *from++;
1721 }
1722 else {
1723 to += len;
1724 from += len;
1725 while (len--)
faf8582f 1726 *(--to) = *(--from);
7c0587c8 1727 }
378cc40b
LW		 1728 return retval;
1729}
ffed7fef 1730#endif
378cc40b 1731
7a3f2258 1732/* this is a drop-in replacement for memset() */
fc36a67e 1733#ifndef HAS_MEMSET
1734void *
7a3f2258 1735Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1736{
2d03de9c 1737 char * const retval = loc;
fc36a67e 1738
1739 while (len--)
1740 *loc++ = ch;
1741 return retval;
1742}
1743#endif
1744
7a3f2258 1745/* this is a drop-in replacement for bzero() */
7c0587c8 1746#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1747char *
7a3f2258 1748Perl_my_bzero(register char *loc, register I32 len)
378cc40b 1749{
2d03de9c 1750 char * const retval = loc;
378cc40b
LW		 1751
1752 while (len--)
1753 *loc++ = 0;
1754 return retval;
1755}
1756#endif
7c0587c8 1757
7a3f2258 1758/* this is a drop-in replacement for memcmp() */
36477c24 1759#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1760I32
7a3f2258 1761Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1762{
e1ec3a88
AL		 1763 register const U8 *a = (const U8 *)s1;
1764 register const U8 *b = (const U8 *)s2;
79072805 1765 register I32 tmp;
7c0587c8
LW		 1766
1767 while (len--) {
27da23d5 1768 if ((tmp = *a++ - *b++))
7c0587c8
LW		 1769 return tmp;
1770 }
1771 return 0;
1772}
36477c24 1773#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1774
fe14fcc3 1775#ifndef HAS_VPRINTF
a687059c 1776
85e6fe83 1777#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1778char *
1779#else
1780int
1781#endif
08105a92 1782vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 1783{
1784 FILE fakebuf;
1785
1786 fakebuf._ptr = dest;
1787 fakebuf._cnt = 32767;
35c8bce7
LW		 1788#ifndef _IOSTRG
1789#define _IOSTRG 0
1790#endif
a687059c
LW		 1791 fakebuf._flag = _IOWRT|_IOSTRG;
1792 _doprnt(pat, args, &fakebuf); /* what a kludge */
1793 (void)putc('\0', &fakebuf);
85e6fe83 1794#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1795 return(dest);
1796#else
1797 return 0; /* perl doesn't use return value */
1798#endif
1799}
1800
fe14fcc3 1801#endif /* HAS_VPRINTF */
a687059c
LW		 1802
1803#ifdef MYSWAP
ffed7fef 1804#if BYTEORDER != 0x4321
a687059c 1805short
864dbfa3 1806Perl_my_swap(pTHX_ short s)
a687059c
LW		 1807{
1808#if (BYTEORDER & 1) == 0
1809 short result;
1810
1811 result = ((s & 255) << 8) + ((s >> 8) & 255);
1812 return result;
1813#else
1814 return s;
1815#endif
1816}
1817
1818long
864dbfa3 1819Perl_my_htonl(pTHX_ long l)
a687059c
LW		 1820{
1821 union {
1822 long result;
ffed7fef 1823 char c[sizeof(long)];
a687059c
LW		 1824 } u;
1825
ffed7fef 1826#if BYTEORDER == 0x1234
a687059c
LW		 1827 u.c[0] = (l >> 24) & 255;
1828 u.c[1] = (l >> 16) & 255;
1829 u.c[2] = (l >> 8) & 255;
1830 u.c[3] = l & 255;
1831 return u.result;
1832#else
ffed7fef 1833#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1834 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1835#else
79072805
LW		 1836 register I32 o;
1837 register I32 s;
a687059c 1838
ffed7fef
LW		 1839 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1840 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 1841 }
1842 return u.result;
1843#endif
1844#endif
1845}
1846
1847long
864dbfa3 1848Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 1849{
1850 union {
1851 long l;
ffed7fef 1852 char c[sizeof(long)];
a687059c
LW		 1853 } u;
1854
ffed7fef 1855#if BYTEORDER == 0x1234
a687059c
LW		 1856 u.c[0] = (l >> 24) & 255;
1857 u.c[1] = (l >> 16) & 255;
1858 u.c[2] = (l >> 8) & 255;
1859 u.c[3] = l & 255;
1860 return u.l;
1861#else
ffed7fef 1862#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1863 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1864#else
79072805
LW		 1865 register I32 o;
1866 register I32 s;
a687059c
LW		 1867
1868 u.l = l;
1869 l = 0;
ffed7fef
LW		 1870 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1871 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 1872 }
1873 return l;
1874#endif
1875#endif
1876}
1877
ffed7fef 1878#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 1879#endif /* MYSWAP */
1880
1881/*
1882 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1883 * If these functions are defined,
1884 * the BYTEORDER is neither 0x1234 nor 0x4321.
1885 * However, this is not assumed.
1886 * -DWS
1887 */
1888
1109a392 1889#define HTOLE(name,type) \
988174c1 1890 type \
ba106d47 1891 name (register type n) \
988174c1
LW		 1892 { \
1893 union { \
1894 type value; \
1895 char c[sizeof(type)]; \
1896 } u; \
bb7a0f54
MHM		 1897 register U32 i; \
1898 register U32 s = 0; \
1109a392 1899 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW		 1900 u.c[i] = (n >> s) & 0xFF; \
1901 } \
1902 return u.value; \
1903 }
1904
1109a392 1905#define LETOH(name,type) \
988174c1 1906 type \
ba106d47 1907 name (register type n) \
988174c1
LW		 1908 { \
1909 union { \
1910 type value; \
1911 char c[sizeof(type)]; \
1912 } u; \
bb7a0f54
MHM		 1913 register U32 i; \
1914 register U32 s = 0; \
988174c1
LW		 1915 u.value = n; \
1916 n = 0; \
1109a392
MHM		 1917 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1918 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW		 1919 } \
1920 return n; \
1921 }
1922
1109a392
MHM		 1923/*
1924 * Big-endian byte order functions.
1925 */
1926
1927#define HTOBE(name,type) \
1928 type \
1929 name (register type n) \
1930 { \
1931 union { \
1932 type value; \
1933 char c[sizeof(type)]; \
1934 } u; \
bb7a0f54
MHM		 1935 register U32 i; \
1936 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM		 1937 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1938 u.c[i] = (n >> s) & 0xFF; \
1939 } \
1940 return u.value; \
1941 }
1942
1943#define BETOH(name,type) \
1944 type \
1945 name (register type n) \
1946 { \
1947 union { \
1948 type value; \
1949 char c[sizeof(type)]; \
1950 } u; \
bb7a0f54
MHM		 1951 register U32 i; \
1952 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM		 1953 u.value = n; \
1954 n = 0; \
1955 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1956 n |= ((type)(u.c[i] & 0xFF)) << s; \
1957 } \
1958 return n; \
1959 }
1960
1961/*
1962 * If we just can't do it...
1963 */
1964
1965#define NOT_AVAIL(name,type) \
1966 type \
1967 name (register type n) \
1968 { \
1969 Perl_croak_nocontext(#name "() not available"); \
1970 return n; /* not reached */ \
1971 }
1972
1973
988174c1 1974#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 1975HTOLE(htovs,short)
988174c1
LW		 1976#endif
1977#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 1978HTOLE(htovl,long)
988174c1
LW		 1979#endif
1980#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 1981LETOH(vtohs,short)
988174c1
LW		 1982#endif
1983#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM		 1984LETOH(vtohl,long)
1985#endif
1986
1987#ifdef PERL_NEED_MY_HTOLE16
1988# if U16SIZE == 2
1989HTOLE(Perl_my_htole16,U16)
1990# else
1991NOT_AVAIL(Perl_my_htole16,U16)
1992# endif
1993#endif
1994#ifdef PERL_NEED_MY_LETOH16
1995# if U16SIZE == 2
1996LETOH(Perl_my_letoh16,U16)
1997# else
1998NOT_AVAIL(Perl_my_letoh16,U16)
1999# endif
2000#endif
2001#ifdef PERL_NEED_MY_HTOBE16
2002# if U16SIZE == 2
2003HTOBE(Perl_my_htobe16,U16)
2004# else
2005NOT_AVAIL(Perl_my_htobe16,U16)
2006# endif
2007#endif
2008#ifdef PERL_NEED_MY_BETOH16
2009# if U16SIZE == 2
2010BETOH(Perl_my_betoh16,U16)
2011# else
2012NOT_AVAIL(Perl_my_betoh16,U16)
2013# endif
2014#endif
2015
2016#ifdef PERL_NEED_MY_HTOLE32
2017# if U32SIZE == 4
2018HTOLE(Perl_my_htole32,U32)
2019# else
2020NOT_AVAIL(Perl_my_htole32,U32)
2021# endif
2022#endif
2023#ifdef PERL_NEED_MY_LETOH32
2024# if U32SIZE == 4
2025LETOH(Perl_my_letoh32,U32)
2026# else
2027NOT_AVAIL(Perl_my_letoh32,U32)
2028# endif
2029#endif
2030#ifdef PERL_NEED_MY_HTOBE32
2031# if U32SIZE == 4
2032HTOBE(Perl_my_htobe32,U32)
2033# else
2034NOT_AVAIL(Perl_my_htobe32,U32)
2035# endif
2036#endif
2037#ifdef PERL_NEED_MY_BETOH32
2038# if U32SIZE == 4
2039BETOH(Perl_my_betoh32,U32)
2040# else
2041NOT_AVAIL(Perl_my_betoh32,U32)
2042# endif
2043#endif
2044
2045#ifdef PERL_NEED_MY_HTOLE64
2046# if U64SIZE == 8
2047HTOLE(Perl_my_htole64,U64)
2048# else
2049NOT_AVAIL(Perl_my_htole64,U64)
2050# endif
2051#endif
2052#ifdef PERL_NEED_MY_LETOH64
2053# if U64SIZE == 8
2054LETOH(Perl_my_letoh64,U64)
2055# else
2056NOT_AVAIL(Perl_my_letoh64,U64)
2057# endif
2058#endif
2059#ifdef PERL_NEED_MY_HTOBE64
2060# if U64SIZE == 8
2061HTOBE(Perl_my_htobe64,U64)
2062# else
2063NOT_AVAIL(Perl_my_htobe64,U64)
2064# endif
2065#endif
2066#ifdef PERL_NEED_MY_BETOH64
2067# if U64SIZE == 8
2068BETOH(Perl_my_betoh64,U64)
2069# else
2070NOT_AVAIL(Perl_my_betoh64,U64)
2071# endif
988174c1 2072#endif
a687059c 2073
1109a392
MHM		 2074#ifdef PERL_NEED_MY_HTOLES
2075HTOLE(Perl_my_htoles,short)
2076#endif
2077#ifdef PERL_NEED_MY_LETOHS
2078LETOH(Perl_my_letohs,short)
2079#endif
2080#ifdef PERL_NEED_MY_HTOBES
2081HTOBE(Perl_my_htobes,short)
2082#endif
2083#ifdef PERL_NEED_MY_BETOHS
2084BETOH(Perl_my_betohs,short)
2085#endif
2086
2087#ifdef PERL_NEED_MY_HTOLEI
2088HTOLE(Perl_my_htolei,int)
2089#endif
2090#ifdef PERL_NEED_MY_LETOHI
2091LETOH(Perl_my_letohi,int)
2092#endif
2093#ifdef PERL_NEED_MY_HTOBEI
2094HTOBE(Perl_my_htobei,int)
2095#endif
2096#ifdef PERL_NEED_MY_BETOHI
2097BETOH(Perl_my_betohi,int)
2098#endif
2099
2100#ifdef PERL_NEED_MY_HTOLEL
2101HTOLE(Perl_my_htolel,long)
2102#endif
2103#ifdef PERL_NEED_MY_LETOHL
2104LETOH(Perl_my_letohl,long)
2105#endif
2106#ifdef PERL_NEED_MY_HTOBEL
2107HTOBE(Perl_my_htobel,long)
2108#endif
2109#ifdef PERL_NEED_MY_BETOHL
2110BETOH(Perl_my_betohl,long)
2111#endif
2112
2113void
2114Perl_my_swabn(void *ptr, int n)
2115{
2116 register char *s = (char *)ptr;
2117 register char *e = s + (n-1);
2118 register char tc;
2119
2120 for (n /= 2; n > 0; s++, e--, n--) {
2121 tc = *s;
2122 *s = *e;
2123 *e = tc;
2124 }
2125}
2126
4a7d1889
NIS		 2127PerlIO *
2128Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
2129{
2986a63f 2130#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
97aff369 2131 dVAR;
1f852d0d
NIS		 2132 int p[2];
2133 register I32 This, that;
2134 register Pid_t pid;
2135 SV *sv;
2136 I32 did_pipes = 0;
2137 int pp[2];
2138
2139 PERL_FLUSHALL_FOR_CHILD;
2140 This = (*mode == 'w');
2141 that = !This;
2142 if (PL_tainting) {
2143 taint_env();
2144 taint_proper("Insecure %s%s", "EXEC");
2145 }
2146 if (PerlProc_pipe(p) < 0)
4608196e 2147 return NULL;
1f852d0d
NIS		 2148 /* Try for another pipe pair for error return */
2149 if (PerlProc_pipe(pp) >= 0)
2150 did_pipes = 1;
52e18b1f 2151 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS		 2152 if (errno != EAGAIN) {
2153 PerlLIO_close(p[This]);
4e6dfe71 2154 PerlLIO_close(p[that]);
1f852d0d
NIS		 2155 if (did_pipes) {
2156 PerlLIO_close(pp[0]);
2157 PerlLIO_close(pp[1]);
2158 }
4608196e 2159 return NULL;
1f852d0d
NIS		 2160 }
2161 sleep(5);
2162 }
2163 if (pid == 0) {
2164 /* Child */
1f852d0d
NIS		 2165#undef THIS
2166#undef THAT
2167#define THIS that
2168#define THAT This
1f852d0d
NIS		 2169 /* Close parent's end of error status pipe (if any) */
2170 if (did_pipes) {
2171 PerlLIO_close(pp[0]);
2172#if defined(HAS_FCNTL) && defined(F_SETFD)
2173 /* Close error pipe automatically if exec works */
2174 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2175#endif
2176 }
2177 /* Now dup our end of _the_ pipe to right position */
2178 if (p[THIS] != (*mode == 'r')) {
2179 PerlLIO_dup2(p[THIS], *mode == 'r');
2180 PerlLIO_close(p[THIS]);
4e6dfe71
GS		 2181 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2182 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2183 }
4e6dfe71
GS		 2184 else
2185 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS		 2186#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2187 /* No automatic close - do it by hand */
b7953727
JH		 2188# ifndef NOFILE
2189# define NOFILE 20
2190# endif
a080fe3d
NIS		 2191 {
2192 int fd;
2193
2194 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2195 if (fd != pp[1])
a080fe3d
NIS		 2196 PerlLIO_close(fd);
2197 }
1f852d0d
NIS		 2198 }
2199#endif
a0714e2c 2200 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
1f852d0d
NIS		 2201 PerlProc__exit(1);
2202#undef THIS
2203#undef THAT
2204 }
2205 /* Parent */
52e18b1f 2206 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS		 2207 if (did_pipes)
2208 PerlLIO_close(pp[1]);
2209 /* Keep the lower of the two fd numbers */
2210 if (p[that] < p[This]) {
2211 PerlLIO_dup2(p[This], p[that]);
2212 PerlLIO_close(p[This]);
2213 p[This] = p[that];
2214 }
4e6dfe71
GS		 2215 else
2216 PerlLIO_close(p[that]); /* close child's end of pipe */
2217
1f852d0d
NIS		 2218 LOCK_FDPID_MUTEX;
2219 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2220 UNLOCK_FDPID_MUTEX;
862a34c6 2221 SvUPGRADE(sv,SVt_IV);
45977657 2222 SvIV_set(sv, pid);
1f852d0d
NIS		 2223 PL_forkprocess = pid;
2224 /* If we managed to get status pipe check for exec fail */
2225 if (did_pipes && pid > 0) {
2226 int errkid;
bb7a0f54
MHM		 2227 unsigned n = 0;
2228 SSize_t n1;
1f852d0d
NIS		 2229
2230 while (n < sizeof(int)) {
2231 n1 = PerlLIO_read(pp[0],
2232 (void*)(((char*)&errkid)+n),
2233 (sizeof(int)) - n);
2234 if (n1 <= 0)
2235 break;
2236 n += n1;
2237 }
2238 PerlLIO_close(pp[0]);
2239 did_pipes = 0;
2240 if (n) { /* Error */
2241 int pid2, status;
8c51524e 2242 PerlLIO_close(p[This]);
1f852d0d
NIS		 2243 if (n != sizeof(int))
2244 Perl_croak(aTHX_ "panic: kid popen errno read");
2245 do {
2246 pid2 = wait4pid(pid, &status, 0);
2247 } while (pid2 == -1 && errno == EINTR);
2248 errno = errkid; /* Propagate errno from kid */
4608196e 2249 return NULL;
1f852d0d
NIS		 2250 }
2251 }
2252 if (did_pipes)
2253 PerlLIO_close(pp[0]);
2254 return PerlIO_fdopen(p[This], mode);
2255#else
4a7d1889
NIS		 2256 Perl_croak(aTHX_ "List form of piped open not implemented");
2257 return (PerlIO *) NULL;
1f852d0d 2258#endif
4a7d1889
NIS		 2259}
2260
5f05dabc 2261 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 2262#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 2263PerlIO *
3dd43144 2264Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c 2265{
97aff369 2266 dVAR;
a687059c 2267 int p[2];
8ac85365 2268 register I32 This, that;
d8a83dd3 2269 register Pid_t pid;
79072805 2270 SV *sv;
bfce84ec 2271 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ		 2272 I32 did_pipes = 0;
2273 int pp[2];
a687059c 2274
45bc9206 2275 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2276#ifdef OS2
2277 if (doexec) {
23da6c43 2278 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2279 }
a1d180c4 2280#endif
8ac85365
NIS		 2281 This = (*mode == 'w');
2282 that = !This;
3280af22 2283 if (doexec && PL_tainting) {
bbce6d69 2284 taint_env();
2285 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2286 }
c2267164 2287 if (PerlProc_pipe(p) < 0)
4608196e 2288 return NULL;
e446cec8
IZ		 2289 if (doexec && PerlProc_pipe(pp) >= 0)
2290 did_pipes = 1;
52e18b1f 2291 while ((pid = PerlProc_fork()) < 0) {
a687059c 2292 if (errno != EAGAIN) {
6ad3d225 2293 PerlLIO_close(p[This]);
b5ac89c3 2294 PerlLIO_close(p[that]);
e446cec8
IZ		 2295 if (did_pipes) {
2296 PerlLIO_close(pp[0]);
2297 PerlLIO_close(pp[1]);
2298 }
a687059c 2299 if (!doexec)
cea2e8a9 2300 Perl_croak(aTHX_ "Can't fork");
4608196e 2301 return NULL;
a687059c
LW		 2302 }
2303 sleep(5);
2304 }
2305 if (pid == 0) {
79072805
LW		 2306 GV* tmpgv;
2307
30ac6d9b
GS		 2308#undef THIS
2309#undef THAT
a687059c 2310#define THIS that
8ac85365 2311#define THAT This
e446cec8
IZ		 2312 if (did_pipes) {
2313 PerlLIO_close(pp[0]);
2314#if defined(HAS_FCNTL) && defined(F_SETFD)
2315 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2316#endif
2317 }
a687059c 2318 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2319 PerlLIO_dup2(p[THIS], *mode == 'r');
2320 PerlLIO_close(p[THIS]);
b5ac89c3
NIS		 2321 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2322 PerlLIO_close(p[THAT]);
a687059c 2323 }
b5ac89c3
NIS		 2324 else
2325 PerlLIO_close(p[THAT]);
4435c477 2326#ifndef OS2
a687059c 2327 if (doexec) {
a0d0e21e 2328#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2329#ifndef NOFILE
2330#define NOFILE 20
2331#endif
a080fe3d 2332 {
3aed30dc 2333 int fd;
a080fe3d
NIS		 2334
2335 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2336 if (fd != pp[1])
3aed30dc 2337 PerlLIO_close(fd);
a080fe3d 2338 }
ae986130 2339#endif
a080fe3d
NIS		 2340 /* may or may not use the shell */
2341 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2342 PerlProc__exit(1);
a687059c 2343 }
4435c477 2344#endif /* defined OS2 */
fafc274c 2345 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4d76a344 2346 SvREADONLY_off(GvSV(tmpgv));
7766f137 2347 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS		 2348 SvREADONLY_on(GvSV(tmpgv));
2349 }
2350#ifdef THREADS_HAVE_PIDS
2351 PL_ppid = (IV)getppid();
2352#endif
3280af22 2353 PL_forkprocess = 0;
ca0c25f6 2354#ifdef PERL_USES_PL_PIDSTATUS
3280af22 2355 hv_clear(PL_pidstatus); /* we have no children */
ca0c25f6 2356#endif
4608196e 2357 return NULL;
a687059c
LW		 2358#undef THIS
2359#undef THAT
2360 }
b5ac89c3 2361 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ		 2362 if (did_pipes)
2363 PerlLIO_close(pp[1]);
8ac85365 2364 if (p[that] < p[This]) {
6ad3d225
GS		 2365 PerlLIO_dup2(p[This], p[that]);
2366 PerlLIO_close(p[This]);
8ac85365 2367 p[This] = p[that];
62b28dd9 2368 }
b5ac89c3
NIS		 2369 else
2370 PerlLIO_close(p[that]);
2371
4755096e 2372 LOCK_FDPID_MUTEX;
3280af22 2373 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2374 UNLOCK_FDPID_MUTEX;
862a34c6 2375 SvUPGRADE(sv,SVt_IV);
45977657 2376 SvIV_set(sv, pid);
3280af22 2377 PL_forkprocess = pid;
e446cec8
IZ		 2378 if (did_pipes && pid > 0) {
2379 int errkid;
bb7a0f54
MHM		 2380 unsigned n = 0;
2381 SSize_t n1;
e446cec8
IZ		 2382
2383 while (n < sizeof(int)) {
2384 n1 = PerlLIO_read(pp[0],
2385 (void*)(((char*)&errkid)+n),
2386 (sizeof(int)) - n);
2387 if (n1 <= 0)
2388 break;
2389 n += n1;
2390 }
2f96c702
IZ		 2391 PerlLIO_close(pp[0]);
2392 did_pipes = 0;
e446cec8 2393 if (n) { /* Error */
faa466a7 2394 int pid2, status;
8c51524e 2395 PerlLIO_close(p[This]);
e446cec8 2396 if (n != sizeof(int))
cea2e8a9 2397 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG		 2398 do {
2399 pid2 = wait4pid(pid, &status, 0);
2400 } while (pid2 == -1 && errno == EINTR);
e446cec8 2401 errno = errkid; /* Propagate errno from kid */
4608196e 2402 return NULL;
e446cec8
IZ		 2403 }
2404 }
2405 if (did_pipes)
2406 PerlLIO_close(pp[0]);
8ac85365 2407 return PerlIO_fdopen(p[This], mode);
a687059c 2408}
7c0587c8 2409#else
85ca448a 2410#if defined(atarist) || defined(EPOC)
7c0587c8 2411FILE *popen();
760ac839 2412PerlIO *
864dbfa3 2413Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2414{
45bc9206 2415 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS		 2416 /* Call system's popen() to get a FILE *, then import it.
2417 used 0 for 2nd parameter to PerlIO_importFILE;
2418 apparently not used
2419 */
2420 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2421}
2b96b0a5
JH		 2422#else
2423#if defined(DJGPP)
2424FILE *djgpp_popen();
2425PerlIO *
2426Perl_my_popen(pTHX_ char *cmd, char *mode)
2427{
2428 PERL_FLUSHALL_FOR_CHILD;
2429 /* Call system's popen() to get a FILE *, then import it.
2430 used 0 for 2nd parameter to PerlIO_importFILE;
2431 apparently not used
2432 */
2433 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2434}
2435#endif
7c0587c8
LW		 2436#endif
2437
2438#endif /* !DOSISH */
a687059c 2439
52e18b1f
GS		 2440/* this is called in parent before the fork() */
2441void
2442Perl_atfork_lock(void)
2443{
27da23d5 2444 dVAR;
3db8f154 2445#if defined(USE_ITHREADS)
52e18b1f
GS		 2446 /* locks must be held in locking order (if any) */
2447# ifdef MYMALLOC
2448 MUTEX_LOCK(&PL_malloc_mutex);
2449# endif
2450 OP_REFCNT_LOCK;
2451#endif
2452}
2453
2454/* this is called in both parent and child after the fork() */
2455void
2456Perl_atfork_unlock(void)
2457{
27da23d5 2458 dVAR;
3db8f154 2459#if defined(USE_ITHREADS)
52e18b1f
GS		 2460 /* locks must be released in same order as in atfork_lock() */
2461# ifdef MYMALLOC
2462 MUTEX_UNLOCK(&PL_malloc_mutex);
2463# endif
2464 OP_REFCNT_UNLOCK;
2465#endif
2466}
2467
2468Pid_t
2469Perl_my_fork(void)
2470{
2471#if defined(HAS_FORK)
2472 Pid_t pid;
3db8f154 2473#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS		 2474 atfork_lock();
2475 pid = fork();
2476 atfork_unlock();
2477#else
2478 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2479 * handlers elsewhere in the code */
2480 pid = fork();
2481#endif
2482 return pid;
2483#else
2484 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2485 Perl_croak_nocontext("fork() not available");
b961a566 2486 return 0;
52e18b1f
GS		 2487#endif /* HAS_FORK */
2488}
2489
748a9306 2490#ifdef DUMP_FDS
35ff7856 2491void
864dbfa3 2492Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2493{
2494 int fd;
c623ac67 2495 Stat_t tmpstatbuf;
ae986130 2496
bf49b057 2497 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2498 for (fd = 0; fd < 32; fd++) {
6ad3d225 2499 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2500 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2501 }
bf49b057 2502 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2503 return;
ae986130 2504}
35ff7856 2505#endif /* DUMP_FDS */
ae986130 2506
fe14fcc3 2507#ifndef HAS_DUP2
fec02dd3 2508int
ba106d47 2509dup2(int oldfd, int newfd)
a687059c 2510{
a0d0e21e 2511#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2512 if (oldfd == newfd)
2513 return oldfd;
6ad3d225 2514 PerlLIO_close(newfd);
fec02dd3 2515 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2516#else
fc36a67e 2517#define DUP2_MAX_FDS 256
2518 int fdtmp[DUP2_MAX_FDS];
79072805 2519 I32 fdx = 0;
ae986130
LW		 2520 int fd;
2521
fe14fcc3 2522 if (oldfd == newfd)
fec02dd3 2523 return oldfd;
6ad3d225 2524 PerlLIO_close(newfd);
fc36a67e 2525 /* good enough for low fd's... */
6ad3d225 2526 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2527 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2528 PerlLIO_close(fd);
fc36a67e 2529 fd = -1;
2530 break;
2531 }
ae986130 2532 fdtmp[fdx++] = fd;
fc36a67e 2533 }
ae986130 2534 while (fdx > 0)
6ad3d225 2535 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2536 return fd;
62b28dd9 2537#endif
a687059c
LW		 2538}
2539#endif
2540
64ca3a65 2541#ifndef PERL_MICRO
ff68c719 2542#ifdef HAS_SIGACTION
2543
abea2c45
HS		 2544#ifdef MACOS_TRADITIONAL
2545/* We don't want restart behavior on MacOS */
2546#undef SA_RESTART
2547#endif
2548
ff68c719 2549Sighandler_t
864dbfa3 2550Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2551{
27da23d5 2552 dVAR;
ff68c719 2553 struct sigaction act, oact;
2554
a10b1e10
JH		 2555#ifdef USE_ITHREADS
2556 /* only "parent" interpreter can diddle signals */
2557 if (PL_curinterp != aTHX)
8aad04aa 2558 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2559#endif
2560
8aad04aa 2561 act.sa_handler = (void(*)(int))handler;
ff68c719 2562 sigemptyset(&act.sa_mask);
2563 act.sa_flags = 0;
2564#ifdef SA_RESTART
4ffa73a3
JH		 2565 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2566 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2567#endif
358837b8 2568#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2569 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS		 2570 act.sa_flags |= SA_NOCLDWAIT;
2571#endif
ff68c719 2572 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2573 return (Sighandler_t) SIG_ERR;
ff68c719 2574 else
8aad04aa 2575 return (Sighandler_t) oact.sa_handler;
ff68c719 2576}
2577
2578Sighandler_t
864dbfa3 2579Perl_rsignal_state(pTHX_ int signo)
ff68c719 2580{
2581 struct sigaction oact;
96a5add6 2582 PERL_UNUSED_CONTEXT;
ff68c719 2583
2584 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2585 return (Sighandler_t) SIG_ERR;
ff68c719 2586 else
8aad04aa 2587 return (Sighandler_t) oact.sa_handler;
ff68c719 2588}
2589
2590int
864dbfa3 2591Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2592{
27da23d5 2593 dVAR;
ff68c719 2594 struct sigaction act;
2595
a10b1e10
JH		 2596#ifdef USE_ITHREADS
2597 /* only "parent" interpreter can diddle signals */
2598 if (PL_curinterp != aTHX)
2599 return -1;
2600#endif
2601
8aad04aa 2602 act.sa_handler = (void(*)(int))handler;
ff68c719 2603 sigemptyset(&act.sa_mask);
2604 act.sa_flags = 0;
2605#ifdef SA_RESTART
4ffa73a3
JH		 2606 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2607 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2608#endif
36b5d377 2609#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2610 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS		 2611 act.sa_flags |= SA_NOCLDWAIT;
2612#endif
ff68c719 2613 return sigaction(signo, &act, save);
2614}
2615
2616int
864dbfa3 2617Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2618{
27da23d5 2619 dVAR;
a10b1e10
JH		 2620#ifdef USE_ITHREADS
2621 /* only "parent" interpreter can diddle signals */
2622 if (PL_curinterp != aTHX)
2623 return -1;
2624#endif
2625
ff68c719 2626 return sigaction(signo, save, (struct sigaction *)NULL);
2627}
2628
2629#else /* !HAS_SIGACTION */
2630
2631Sighandler_t
864dbfa3 2632Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2633{
39f1703b 2634#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2635 /* only "parent" interpreter can diddle signals */
2636 if (PL_curinterp != aTHX)
8aad04aa 2637 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2638#endif
2639
6ad3d225 2640 return PerlProc_signal(signo, handler);
ff68c719 2641}
2642
fabdb6c0 2643static Signal_t
4e35701f 2644sig_trap(int signo)
ff68c719 2645{
27da23d5
JH		 2646 dVAR;
2647 PL_sig_trapped++;
ff68c719 2648}
2649
2650Sighandler_t
864dbfa3 2651Perl_rsignal_state(pTHX_ int signo)
ff68c719 2652{
27da23d5 2653 dVAR;
ff68c719 2654 Sighandler_t oldsig;
2655
39f1703b 2656#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2657 /* only "parent" interpreter can diddle signals */
2658 if (PL_curinterp != aTHX)
8aad04aa 2659 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2660#endif
2661
27da23d5 2662 PL_sig_trapped = 0;
6ad3d225
GS		 2663 oldsig = PerlProc_signal(signo, sig_trap);
2664 PerlProc_signal(signo, oldsig);
27da23d5 2665 if (PL_sig_trapped)
3aed30dc 2666 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719 2667 return oldsig;
2668}
2669
2670int
864dbfa3 2671Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2672{
39f1703b 2673#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2674 /* only "parent" interpreter can diddle signals */
2675 if (PL_curinterp != aTHX)
2676 return -1;
2677#endif
6ad3d225 2678 *save = PerlProc_signal(signo, handler);
8aad04aa 2679 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719 2680}
2681
2682int
864dbfa3 2683Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2684{
39f1703b 2685#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2686 /* only "parent" interpreter can diddle signals */
2687 if (PL_curinterp != aTHX)
2688 return -1;
2689#endif
8aad04aa 2690 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719 2691}
2692
2693#endif /* !HAS_SIGACTION */
64ca3a65 2694#endif /* !PERL_MICRO */
ff68c719 2695
5f05dabc 2696 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2697#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2698I32
864dbfa3 2699Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2700{
97aff369 2701 dVAR;
ff68c719 2702 Sigsave_t hstat, istat, qstat;
a687059c 2703 int status;
a0d0e21e 2704 SV **svp;
d8a83dd3
JH		 2705 Pid_t pid;
2706 Pid_t pid2;
03136e13 2707 bool close_failed;
b7953727 2708 int saved_errno = 0;
22fae026
TM		 2709#ifdef WIN32
2710 int saved_win32_errno;
2711#endif
a687059c 2712
4755096e 2713 LOCK_FDPID_MUTEX;
3280af22 2714 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2715 UNLOCK_FDPID_MUTEX;
25d92023 2716 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2717 SvREFCNT_dec(*svp);
3280af22 2718 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2719#ifdef OS2
2720 if (pid == -1) { /* Opened by popen. */
2721 return my_syspclose(ptr);
2722 }
a1d180c4 2723#endif
03136e13
CS		 2724 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2725 saved_errno = errno;
22fae026
TM		 2726#ifdef WIN32
2727 saved_win32_errno = GetLastError();
2728#endif
03136e13 2729 }
7c0587c8 2730#ifdef UTS
6ad3d225 2731 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2732#endif
64ca3a65 2733#ifndef PERL_MICRO
8aad04aa
JH		 2734 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2735 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2736 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
64ca3a65 2737#endif
748a9306 2738 do {
1d3434b8
GS		 2739 pid2 = wait4pid(pid, &status, 0);
2740 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2741#ifndef PERL_MICRO
ff68c719 2742 rsignal_restore(SIGHUP, &hstat);
2743 rsignal_restore(SIGINT, &istat);
2744 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2745#endif
03136e13 2746 if (close_failed) {
ce6e1103 2747 SETERRNO(saved_errno, 0);
03136e13
CS		 2748 return -1;
2749 }
1d3434b8 2750 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2751}
4633a7c4
LW		 2752#endif /* !DOSISH */
2753
2986a63f 2754#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
79072805 2755I32
d8a83dd3 2756Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2757{
97aff369 2758 dVAR;
27da23d5 2759 I32 result = 0;
b7953727
JH		 2760 if (!pid)
2761 return -1;
ca0c25f6 2762#ifdef PERL_USES_PL_PIDSTATUS
b7953727 2763 {
3aed30dc 2764 if (pid > 0) {
12072db5
NC		 2765 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2766 pid, rather than a string form. */
c4420975 2767 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
3aed30dc
HS		 2768 if (svp && *svp != &PL_sv_undef) {
2769 *statusp = SvIVX(*svp);
12072db5
NC		 2770 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2771 G_DISCARD);
3aed30dc
HS		 2772 return pid;
2773 }
2774 }
2775 else {
2776 HE *entry;
2777
2778 hv_iterinit(PL_pidstatus);
2779 if ((entry = hv_iternext(PL_pidstatus))) {
c4420975 2780 SV * const sv = hv_iterval(PL_pidstatus,entry);
7ea75b61 2781 I32 len;
0bcc34c2 2782 const char * const spid = hv_iterkey(entry,&len);
27da23d5 2783
12072db5
NC		 2784 assert (len == sizeof(Pid_t));
2785 memcpy((char *)&pid, spid, len);
3aed30dc 2786 *statusp = SvIVX(sv);
7b9a3241
NC		 2787 /* The hash iterator is currently on this entry, so simply
2788 calling hv_delete would trigger the lazy delete, which on
2789 aggregate does more work, beacuse next call to hv_iterinit()
2790 would spot the flag, and have to call the delete routine,
2791 while in the meantime any new entries can't re-use that
2792 memory. */
2793 hv_iterinit(PL_pidstatus);
7ea75b61 2794 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
3aed30dc
HS		 2795 return pid;
2796 }
20188a90
LW		 2797 }
2798 }
68a29c53 2799#endif
79072805 2800#ifdef HAS_WAITPID
367f3c24
IZ		 2801# ifdef HAS_WAITPID_RUNTIME
2802 if (!HAS_WAITPID_RUNTIME)
2803 goto hard_way;
2804# endif
cddd4526 2805 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2806 goto finish;
367f3c24
IZ		 2807#endif
2808#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
4608196e 2809 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
dfcfdb64 2810 goto finish;
367f3c24 2811#endif
ca0c25f6 2812#ifdef PERL_USES_PL_PIDSTATUS
27da23d5 2813#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2814 hard_way:
27da23d5 2815#endif
a0d0e21e 2816 {
a0d0e21e 2817 if (flags)
cea2e8a9 2818 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2819 else {
76e3520e 2820 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2821 pidgone(result,*statusp);
2822 if (result < 0)
2823 *statusp = -1;
2824 }
a687059c
LW		 2825 }
2826#endif
27da23d5 2827#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 2828 finish:
27da23d5 2829#endif
cddd4526
NIS		 2830 if (result < 0 && errno == EINTR) {
2831 PERL_ASYNC_CHECK();
2832 }
2833 return result;
a687059c 2834}
2986a63f 2835#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2836
ca0c25f6 2837#ifdef PERL_USES_PL_PIDSTATUS
7c0587c8 2838void
d8a83dd3 2839Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2840{
79072805 2841 register SV *sv;
a687059c 2842
12072db5 2843 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
862a34c6 2844 SvUPGRADE(sv,SVt_IV);
45977657 2845 SvIV_set(sv, status);
20188a90 2846 return;
a687059c 2847}
ca0c25f6 2848#endif
a687059c 2849
85ca448a 2850#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 2851int pclose();
ddcf38b7
IZ		 2852#ifdef HAS_FORK
2853int /* Cannot prototype with I32
2854 in os2ish.h. */
ba106d47 2855my_syspclose(PerlIO *ptr)
ddcf38b7 2856#else
79072805 2857I32
864dbfa3 2858Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2859#endif
a687059c 2860{
760ac839 2861 /* Needs work for PerlIO ! */
c4420975 2862 FILE * const f = PerlIO_findFILE(ptr);
7452cf6a 2863 const I32 result = pclose(f);
2b96b0a5
JH		 2864 PerlIO_releaseFILE(ptr,f);
2865 return result;
2866}
2867#endif
2868
933fea7f 2869#if defined(DJGPP)
2b96b0a5
JH		 2870int djgpp_pclose();
2871I32
2872Perl_my_pclose(pTHX_ PerlIO *ptr)
2873{
2874 /* Needs work for PerlIO ! */
c4420975 2875 FILE * const f = PerlIO_findFILE(ptr);
2b96b0a5 2876 I32 result = djgpp_pclose(f);
933fea7f 2877 result = (result << 8) & 0xff00;
760ac839
LW		 2878 PerlIO_releaseFILE(ptr,f);
2879 return result;
a687059c 2880}
7c0587c8 2881#endif
9f68db38
LW		 2882
2883void
864dbfa3 2884Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2885{
79072805 2886 register I32 todo;
c4420975 2887 register const char * const frombase = from;
96a5add6 2888 PERL_UNUSED_CONTEXT;
9f68db38
LW		 2889
2890 if (len == 1) {
08105a92 2891 register const char c = *from;
9f68db38 2892 while (count-- > 0)
5926133d 2893 *to++ = c;
9f68db38
LW		 2894 return;
2895 }
2896 while (count-- > 0) {
2897 for (todo = len; todo > 0; todo--) {
2898 *to++ = *from++;
2899 }
2900 from = frombase;
2901 }
2902}
0f85fab0 2903
fe14fcc3 2904#ifndef HAS_RENAME
79072805 2905I32
4373e329 2906Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 2907{
93a17b20
LW		 2908 char *fa = strrchr(a,'/');
2909 char *fb = strrchr(b,'/');
c623ac67
GS		 2910 Stat_t tmpstatbuf1;
2911 Stat_t tmpstatbuf2;
c4420975 2912 SV * const tmpsv = sv_newmortal();
62b28dd9
LW		 2913
2914 if (fa)
2915 fa++;
2916 else
2917 fa = a;
2918 if (fb)
2919 fb++;
2920 else
2921 fb = b;
2922 if (strNE(a,b))
2923 return FALSE;
2924 if (fa == a)
616d8c9c 2925 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2926 else
46fc3d4c 2927 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 2928 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 2929 return FALSE;
2930 if (fb == b)
616d8c9c 2931 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2932 else
46fc3d4c 2933 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 2934 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 2935 return FALSE;
2936 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2937 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2938}
fe14fcc3
LW		 2939#endif /* !HAS_RENAME */
2940
491527d0 2941char*
7f315aed
NC		 2942Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
2943 const char *const *const search_ext, I32 flags)
491527d0 2944{
97aff369 2945 dVAR;
bd61b366
SS		 2946 const char *xfound = NULL;
2947 char *xfailed = NULL;
0f31cffe 2948 char tmpbuf[MAXPATHLEN];
491527d0 2949 register char *s;
5f74f29c 2950 I32 len = 0;
491527d0
GS		 2951 int retval;
2952#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2953# define SEARCH_EXTS ".bat", ".cmd", NULL
2954# define MAX_EXT_LEN 4
2955#endif
2956#ifdef OS2
2957# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2958# define MAX_EXT_LEN 4
2959#endif
2960#ifdef VMS
2961# define SEARCH_EXTS ".pl", ".com", NULL
2962# define MAX_EXT_LEN 4
2963#endif
2964 /* additional extensions to try in each dir if scriptname not found */
2965#ifdef SEARCH_EXTS
0bcc34c2 2966 static const char *const exts[] = { SEARCH_EXTS };
7f315aed 2967 const char *const *const ext = search_ext ? search_ext : exts;
491527d0 2968 int extidx = 0, i = 0;
bd61b366 2969 const char *curext = NULL;
491527d0 2970#else
53c1dcc0 2971 PERL_UNUSED_ARG(search_ext);
491527d0
GS		 2972# define MAX_EXT_LEN 0
2973#endif
2974
2975 /*
2976 * If dosearch is true and if scriptname does not contain path
2977 * delimiters, search the PATH for scriptname.
2978 *
2979 * If SEARCH_EXTS is also defined, will look for each
2980 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2981 * while searching the PATH.
2982 *
2983 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2984 * proceeds as follows:
2985 * If DOSISH or VMSISH:
2986 * + look for ./scriptname{,.foo,.bar}
2987 * + search the PATH for scriptname{,.foo,.bar}
2988 *
2989 * If !DOSISH:
2990 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2991 * this will not look in '.' if it's not in the PATH)
2992 */
84486fc6 2993 tmpbuf[0] = '\0';
491527d0
GS		 2994
2995#ifdef VMS
2996# ifdef ALWAYS_DEFTYPES
2997 len = strlen(scriptname);
2998 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
c4420975 2999 int idx = 0, deftypes = 1;
491527d0
GS		 3000 bool seen_dot = 1;
3001
bd61b366 3002 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
491527d0
GS		 3003# else
3004 if (dosearch) {
c4420975 3005 int idx = 0, deftypes = 1;
491527d0
GS		 3006 bool seen_dot = 1;
3007
bd61b366 3008 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
491527d0
GS		 3009# endif
3010 /* The first time through, just add SEARCH_EXTS to whatever we
3011 * already have, so we can check for default file types. */
3012 while (deftypes ||
84486fc6 3013 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 3014 {
3015 if (deftypes) {
3016 deftypes = 0;
84486fc6 3017 *tmpbuf = '\0';
491527d0 3018 }
84486fc6
GS		 3019 if ((strlen(tmpbuf) + strlen(scriptname)
3020 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 3021 continue; /* don't search dir with too-long name */
84486fc6 3022 strcat(tmpbuf, scriptname);
491527d0
GS		 3023#else /* !VMS */
3024
3025#ifdef DOSISH
3026 if (strEQ(scriptname, "-"))
3027 dosearch = 0;
3028 if (dosearch) { /* Look in '.' first. */
fe2774ed 3029 const char *cur = scriptname;
491527d0
GS		 3030#ifdef SEARCH_EXTS
3031 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3032 while (ext[i])
3033 if (strEQ(ext[i++],curext)) {
3034 extidx = -1; /* already has an ext */
3035 break;
3036 }
3037 do {
3038#endif
3039 DEBUG_p(PerlIO_printf(Perl_debug_log,
3040 "Looking for %s\n",cur));
017f25f1
IZ		 3041 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3042 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 3043 dosearch = 0;
3044 scriptname = cur;
3045#ifdef SEARCH_EXTS
3046 break;
3047#endif
3048 }
3049#ifdef SEARCH_EXTS
3050 if (cur == scriptname) {
3051 len = strlen(scriptname);
84486fc6 3052 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 3053 break;
490a0e98 3054 /* FIXME? Convert to memcpy */
84486fc6 3055 cur = strcpy(tmpbuf, scriptname);
491527d0
GS		 3056 }
3057 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 3058 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS		 3059#endif
3060 }
3061#endif
3062
cd39f2b6
JH		 3063#ifdef MACOS_TRADITIONAL
3064 if (dosearch && !strchr(scriptname, ':') &&
3065 (s = PerlEnv_getenv("Commands")))
3066#else
491527d0
GS		 3067 if (dosearch && !strchr(scriptname, '/')
3068#ifdef DOSISH
3069 && !strchr(scriptname, '\\')
3070#endif
cd39f2b6
JH		 3071 && (s = PerlEnv_getenv("PATH")))
3072#endif
3073 {
491527d0 3074 bool seen_dot = 0;
92f0c265 3075
3280af22
NIS		 3076 PL_bufend = s + strlen(s);
3077 while (s < PL_bufend) {
cd39f2b6
JH		 3078#ifdef MACOS_TRADITIONAL
3079 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
3080 ',',
3081 &len);
3082#else
491527d0
GS		 3083#if defined(atarist) || defined(DOSISH)
3084 for (len = 0; *s
3085# ifdef atarist
3086 && *s != ','
3087# endif
3088 && *s != ';'; len++, s++) {
84486fc6
GS		 3089 if (len < sizeof tmpbuf)
3090 tmpbuf[len] = *s;
491527d0 3091 }
84486fc6
GS		 3092 if (len < sizeof tmpbuf)
3093 tmpbuf[len] = '\0';
491527d0 3094#else /* ! (atarist || DOSISH) */
3280af22 3095 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 3096 ':',
3097 &len);
3098#endif /* ! (atarist || DOSISH) */
cd39f2b6 3099#endif /* MACOS_TRADITIONAL */
3280af22 3100 if (s < PL_bufend)
491527d0 3101 s++;
84486fc6 3102 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 3103 continue; /* don't search dir with too-long name */
cd39f2b6
JH		 3104#ifdef MACOS_TRADITIONAL
3105 if (len && tmpbuf[len - 1] != ':')
3106 tmpbuf[len++] = ':';
3107#else
491527d0 3108 if (len
490a0e98 3109# if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 3110 && tmpbuf[len - 1] != '/'
3111 && tmpbuf[len - 1] != '\\'
490a0e98 3112# endif
491527d0 3113 )
84486fc6
GS		 3114 tmpbuf[len++] = '/';
3115 if (len == 2 && tmpbuf[0] == '.')
491527d0 3116 seen_dot = 1;
cd39f2b6 3117#endif
e80fed9d
JH		 3118#ifdef HAS_STRLCAT
3119 (void)strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
3120#else
490a0e98
NC		 3121 /* FIXME? Convert to memcpy by storing previous strlen(scriptname)
3122 */
84486fc6 3123 (void)strcpy(tmpbuf + len, scriptname);
e80fed9d 3124#endif /* #ifdef HAS_STRLCAT */
491527d0
GS		 3125#endif /* !VMS */
3126
3127#ifdef SEARCH_EXTS
84486fc6 3128 len = strlen(tmpbuf);
491527d0
GS		 3129 if (extidx > 0) /* reset after previous loop */
3130 extidx = 0;
3131 do {
3132#endif
84486fc6 3133 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 3134 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 3135 if (S_ISDIR(PL_statbuf.st_mode)) {
3136 retval = -1;
3137 }
491527d0
GS		 3138#ifdef SEARCH_EXTS
3139 } while ( retval < 0 /* not there */
3140 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 3141 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS		 3142 );
3143#endif
3144 if (retval < 0)
3145 continue;
3280af22
NIS		 3146 if (S_ISREG(PL_statbuf.st_mode)
3147 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 3148#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 3149 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 3150#endif
3151 )
3152 {
3aed30dc 3153 xfound = tmpbuf; /* bingo! */
491527d0
GS		 3154 break;
3155 }
3156 if (!xfailed)
84486fc6 3157 xfailed = savepv(tmpbuf);
491527d0
GS		 3158 }
3159#ifndef DOSISH
017f25f1 3160 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3161 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3162 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 3163#endif
3164 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 3165 if (!xfound) {
3166 if (flags & 1) { /* do or die? */
3aed30dc 3167 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 3168 (xfailed ? "execute" : "find"),
3169 (xfailed ? xfailed : scriptname),
3170 (xfailed ? "" : " on PATH"),
3171 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3172 }
bd61b366 3173 scriptname = NULL;
9ccb31f9 3174 }
43c5f42d 3175 Safefree(xfailed);
491527d0
GS		 3176 scriptname = xfound;
3177 }
bd61b366 3178 return (scriptname ? savepv(scriptname) : NULL);
491527d0
GS		 3179}
3180
ba869deb
GS		 3181#ifndef PERL_GET_CONTEXT_DEFINED
3182
3183void *
3184Perl_get_context(void)
3185{
27da23d5 3186 dVAR;
3db8f154 3187#if defined(USE_ITHREADS)
ba869deb
GS		 3188# ifdef OLD_PTHREADS_API
3189 pthread_addr_t t;
3190 if (pthread_getspecific(PL_thr_key, &t))
3191 Perl_croak_nocontext("panic: pthread_getspecific");
3192 return (void*)t;
3193# else
bce813aa 3194# ifdef I_MACH_CTHREADS
8b8b35ab 3195 return (void*)cthread_data(cthread_self());
bce813aa 3196# else
8b8b35ab
JH		 3197 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3198# endif
c44d3fdb 3199# endif
ba869deb
GS		 3200#else
3201 return (void*)NULL;
3202#endif
3203}
3204
3205void
3206Perl_set_context(void *t)
3207{
8772537c 3208 dVAR;
3db8f154 3209#if defined(USE_ITHREADS)
c44d3fdb
GS		 3210# ifdef I_MACH_CTHREADS
3211 cthread_set_data(cthread_self(), t);
3212# else
ba869deb
GS		 3213 if (pthread_setspecific(PL_thr_key, t))
3214 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3215# endif
b464bac0 3216#else
8772537c 3217 PERL_UNUSED_ARG(t);
ba869deb
GS		 3218#endif
3219}
3220
3221#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3222
27da23d5 3223#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3224struct perl_vars *
864dbfa3 3225Perl_GetVars(pTHX)
22239a37 3226{
533c011a 3227 return &PL_Vars;
22239a37 3228}
31fb1209
NIS		 3229#endif
3230
1cb0ed9b 3231char **
864dbfa3 3232Perl_get_op_names(pTHX)
31fb1209 3233{
96a5add6
AL		 3234 PERL_UNUSED_CONTEXT;
3235 return (char **)PL_op_name;
31fb1209
NIS		 3236}
3237
1cb0ed9b 3238char **
864dbfa3 3239Perl_get_op_descs(pTHX)
31fb1209 3240{
96a5add6
AL		 3241 PERL_UNUSED_CONTEXT;
3242 return (char **)PL_op_desc;
31fb1209 3243}
9e6b2b00 3244
e1ec3a88 3245const char *
864dbfa3 3246Perl_get_no_modify(pTHX)
9e6b2b00 3247{
96a5add6
AL		 3248 PERL_UNUSED_CONTEXT;
3249 return PL_no_modify;
9e6b2b00
GS		 3250}
3251
3252U32 *
864dbfa3 3253Perl_get_opargs(pTHX)
9e6b2b00 3254{
96a5add6
AL		 3255 PERL_UNUSED_CONTEXT;
3256 return (U32 *)PL_opargs;
9e6b2b00 3257}
51aa15f3 3258
0cb96387
GS		 3259PPADDR_t*
3260Perl_get_ppaddr(pTHX)
3261{
96a5add6
AL		 3262 dVAR;
3263 PERL_UNUSED_CONTEXT;
3264 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS		 3265}
3266
a6c40364
GS		 3267#ifndef HAS_GETENV_LEN
3268char *
bf4acbe4 3269Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3270{
8772537c 3271 char * const env_trans = PerlEnv_getenv(env_elem);
96a5add6 3272 PERL_UNUSED_CONTEXT;
a6c40364
GS		 3273 if (env_trans)
3274 *len = strlen(env_trans);
3275 return env_trans;
f675dbe5
CB		 3276}
3277#endif
3278
dc9e4912
GS		 3279
3280MGVTBL*
864dbfa3 3281Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3282{
7452cf6a 3283 const MGVTBL* result;
96a5add6 3284 PERL_UNUSED_CONTEXT;
dc9e4912
GS		 3285
3286 switch(vtbl_id) {
3287 case want_vtbl_sv:
3288 result = &PL_vtbl_sv;
3289 break;
3290 case want_vtbl_env:
3291 result = &PL_vtbl_env;
3292 break;
3293 case want_vtbl_envelem:
3294 result = &PL_vtbl_envelem;
3295 break;
3296 case want_vtbl_sig:
3297 result = &PL_vtbl_sig;
3298 break;
3299 case want_vtbl_sigelem:
3300 result = &PL_vtbl_sigelem;
3301 break;
3302 case want_vtbl_pack:
3303 result = &PL_vtbl_pack;
3304 break;
3305 case want_vtbl_packelem:
3306 result = &PL_vtbl_packelem;
3307 break;
3308 case want_vtbl_dbline:
3309 result = &PL_vtbl_dbline;
3310 break;
3311 case want_vtbl_isa:
3312 result = &PL_vtbl_isa;
3313 break;
3314 case want_vtbl_isaelem:
3315 result = &PL_vtbl_isaelem;
3316 break;
3317 case want_vtbl_arylen:
3318 result = &PL_vtbl_arylen;
3319 break;
dc9e4912
GS		 3320 case want_vtbl_mglob:
3321 result = &PL_vtbl_mglob;
3322 break;
3323 case want_vtbl_nkeys:
3324 result = &PL_vtbl_nkeys;
3325 break;
3326 case want_vtbl_taint:
3327 result = &PL_vtbl_taint;
3328 break;
3329 case want_vtbl_substr:
3330 result = &PL_vtbl_substr;
3331 break;
3332 case want_vtbl_vec:
3333 result = &PL_vtbl_vec;
3334 break;
3335 case want_vtbl_pos:
3336 result = &PL_vtbl_pos;
3337 break;
3338 case want_vtbl_bm:
3339 result = &PL_vtbl_bm;
3340 break;
3341 case want_vtbl_fm:
3342 result = &PL_vtbl_fm;
3343 break;
3344 case want_vtbl_uvar:
3345 result = &PL_vtbl_uvar;
3346 break;
dc9e4912
GS		 3347 case want_vtbl_defelem:
3348 result = &PL_vtbl_defelem;
3349 break;
3350 case want_vtbl_regexp:
3351 result = &PL_vtbl_regexp;
3352 break;
3353 case want_vtbl_regdata:
3354 result = &PL_vtbl_regdata;
3355 break;
3356 case want_vtbl_regdatum:
3357 result = &PL_vtbl_regdatum;
3358 break;
3c90161d 3359#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3360 case want_vtbl_collxfrm:
3361 result = &PL_vtbl_collxfrm;
3362 break;
3c90161d 3363#endif
dc9e4912
GS		 3364 case want_vtbl_amagic:
3365 result = &PL_vtbl_amagic;
3366 break;
3367 case want_vtbl_amagicelem:
3368 result = &PL_vtbl_amagicelem;
3369 break;
810b8aa5
GS		 3370 case want_vtbl_backref:
3371 result = &PL_vtbl_backref;
3372 break;
7e8c5dac
HS		 3373 case want_vtbl_utf8:
3374 result = &PL_vtbl_utf8;
3375 break;
7452cf6a 3376 default:
4608196e 3377 result = NULL;
7452cf6a 3378 break;
dc9e4912 3379 }
27da23d5 3380 return (MGVTBL*)result;
dc9e4912
GS		 3381}
3382
767df6a1 3383I32
864dbfa3 3384Perl_my_fflush_all(pTHX)
767df6a1 3385{
f800e14d 3386#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3387 return PerlIO_flush(NULL);
767df6a1 3388#else
8fbdfb7c 3389# if defined(HAS__FWALK)
f13a2bc0 3390 extern int fflush(FILE *);
74cac757
JH		 3391 /* undocumented, unprototyped, but very useful BSDism */
3392 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3393 _fwalk(&fflush);
74cac757 3394 return 0;
8fa7f367 3395# else
8fbdfb7c 3396# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3397 long open_max = -1;
8fbdfb7c 3398# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3399 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3400# else
8fa7f367 3401# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3402 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH		 3403# else
3404# ifdef FOPEN_MAX
74cac757 3405 open_max = FOPEN_MAX;
8fa7f367
JH		 3406# else
3407# ifdef OPEN_MAX
74cac757 3408 open_max = OPEN_MAX;
8fa7f367
JH		 3409# else
3410# ifdef _NFILE
d2201af2 3411 open_max = _NFILE;
8fa7f367
JH		 3412# endif
3413# endif
74cac757 3414# endif
767df6a1
JH		 3415# endif
3416# endif
767df6a1
JH		 3417 if (open_max > 0) {
3418 long i;
3419 for (i = 0; i < open_max; i++)
d2201af2
AD		 3420 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3421 STDIO_STREAM_ARRAY[i]._file < open_max &&
3422 STDIO_STREAM_ARRAY[i]._flag)
3423 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3424 return 0;
3425 }
8fbdfb7c 3426# endif
93189314 3427 SETERRNO(EBADF,RMS_IFI);
767df6a1 3428 return EOF;
74cac757 3429# endif
767df6a1
JH		 3430#endif
3431}
097ee67d 3432
69282e91 3433void
e1ec3a88 3434Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
bc37a18f 3435{
b64e5050 3436 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
66fc2fa5 3437
4c80c0b2 3438 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3aed30dc 3439 if (ckWARN(WARN_IO)) {
b64e5050 3440 const char * const direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out";
3aed30dc
HS		 3441 if (name && *name)
3442 Perl_warner(aTHX_ packWARN(WARN_IO),
3443 "Filehandle %s opened only for %sput",
fd322ea4 3444 name, direction);
3aed30dc
HS		 3445 else
3446 Perl_warner(aTHX_ packWARN(WARN_IO),
fd322ea4 3447 "Filehandle opened only for %sput", direction);
3aed30dc 3448 }
2dd78f96
JH		 3449 }
3450 else {
e1ec3a88 3451 const char *vile;
3aed30dc
HS		 3452 I32 warn_type;
3453
3454 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3455 vile = "closed";
3456 warn_type = WARN_CLOSED;
3457 }
3458 else {
3459 vile = "unopened";
3460 warn_type = WARN_UNOPENED;
3461 }
3462
3463 if (ckWARN(warn_type)) {
f0a09b71
AL		 3464 const char * const pars = OP_IS_FILETEST(op) ? "" : "()";
3465 const char * const func =
3466 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3467 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3468 op < 0 ? "" : /* handle phoney cases */
3469 PL_op_desc[op];
3470 const char * const type = OP_IS_SOCKET(op)
3471 || (gv && io && IoTYPE(io) == IoTYPE_SOCKET)
3472 ? "socket" : "filehandle";
3aed30dc
HS		 3473 if (name && *name) {
3474 Perl_warner(aTHX_ packWARN(warn_type),
3475 "%s%s on %s %s %s", func, pars, vile, type, name);
3476 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3477 Perl_warner(
3478 aTHX_ packWARN(warn_type),
3479 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3480 func, pars, name
3481 );
3482 }
3483 else {
3484 Perl_warner(aTHX_ packWARN(warn_type),
3485 "%s%s on %s %s", func, pars, vile, type);
3486 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3487 Perl_warner(
3488 aTHX_ packWARN(warn_type),
3489 "\t(Are you trying to call %s%s on dirhandle?)\n",
3490 func, pars
3491 );
3492 }
3493 }
bc37a18f 3494 }
69282e91 3495}
a926ef6b
JH		 3496
3497#ifdef EBCDIC
cbebf344
JH		 3498/* in ASCII order, not that it matters */
3499static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3500
a926ef6b
JH		 3501int
3502Perl_ebcdic_control(pTHX_ int ch)
3503{
3aed30dc 3504 if (ch > 'a') {
e1ec3a88 3505 const char *ctlp;
3aed30dc
HS		 3506
3507 if (islower(ch))
3508 ch = toupper(ch);
3509
3510 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3511 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
a926ef6b 3512 }
3aed30dc
HS		 3513
3514 if (ctlp == controllablechars)
3515 return('\177'); /* DEL */
3516 else
3517 return((unsigned char)(ctlp - controllablechars - 1));
3518 } else { /* Want uncontrol */
3519 if (ch == '\177' || ch == -1)
3520 return('?');
3521 else if (ch == '\157')
3522 return('\177');
3523 else if (ch == '\174')
3524 return('\000');
3525 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3526 return('\036');
3527 else if (ch == '\155')
3528 return('\037');
3529 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3530 return(controllablechars[ch+1]);
3531 else
3532 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3533 }
a926ef6b
JH		 3534}
3535#endif
e72cf795 3536
f6adc668 3537/* To workaround core dumps from the uninitialised tm_zone we get the
e72cf795
JH		 3538 * system to give us a reasonable struct to copy. This fix means that
3539 * strftime uses the tm_zone and tm_gmtoff values returned by
3540 * localtime(time()). That should give the desired result most of the
3541 * time. But probably not always!
3542 *
f6adc668
JH		 3543 * This does not address tzname aspects of NETaa14816.
3544 *
e72cf795 3545 */
f6adc668 3546
e72cf795
JH		 3547#ifdef HAS_GNULIBC
3548# ifndef STRUCT_TM_HASZONE
3549# define STRUCT_TM_HASZONE
3550# endif
3551#endif
3552
f6adc668
JH		 3553#ifdef STRUCT_TM_HASZONE /* Backward compat */
3554# ifndef HAS_TM_TM_ZONE
3555# define HAS_TM_TM_ZONE
3556# endif
3557#endif
3558
e72cf795 3559void
f1208910 3560Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795 3561{
f6adc668 3562#ifdef HAS_TM_TM_ZONE
e72cf795 3563 Time_t now;
1b6737cc 3564 const struct tm* my_tm;
e72cf795 3565 (void)time(&now);
82c57498 3566 my_tm = localtime(&now);
ca46b8ee
SP		 3567 if (my_tm)
3568 Copy(my_tm, ptm, 1, struct tm);
1b6737cc
AL		 3569#else
3570 PERL_UNUSED_ARG(ptm);
e72cf795
JH		 3571#endif
3572}
3573
3574/*
3575 * mini_mktime - normalise struct tm values without the localtime()
3576 * semantics (and overhead) of mktime().
3577 */
3578void
f1208910 3579Perl_mini_mktime(pTHX_ struct tm *ptm)
e72cf795
JH		 3580{
3581 int yearday;
3582 int secs;
3583 int month, mday, year, jday;
3584 int odd_cent, odd_year;
96a5add6 3585 PERL_UNUSED_CONTEXT;
e72cf795
JH		 3586
3587#define DAYS_PER_YEAR 365
3588#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3589#define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3590#define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3591#define SECS_PER_HOUR (60*60)
3592#define SECS_PER_DAY (24*SECS_PER_HOUR)
3593/* parentheses deliberately absent on these two, otherwise they don't work */
3594#define MONTH_TO_DAYS 153/5
3595#define DAYS_TO_MONTH 5/153
3596/* offset to bias by March (month 4) 1st between month/mday & year finding */
3597#define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3598/* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3599#define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3600
3601/*
3602 * Year/day algorithm notes:
3603 *
3604 * With a suitable offset for numeric value of the month, one can find
3605 * an offset into the year by considering months to have 30.6 (153/5) days,
3606 * using integer arithmetic (i.e., with truncation). To avoid too much
3607 * messing about with leap days, we consider January and February to be
3608 * the 13th and 14th month of the previous year. After that transformation,
3609 * we need the month index we use to be high by 1 from 'normal human' usage,
3610 * so the month index values we use run from 4 through 15.
3611 *
3612 * Given that, and the rules for the Gregorian calendar (leap years are those
3613 * divisible by 4 unless also divisible by 100, when they must be divisible
3614 * by 400 instead), we can simply calculate the number of days since some
3615 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3616 * the days we derive from our month index, and adding in the day of the
3617 * month. The value used here is not adjusted for the actual origin which
3618 * it normally would use (1 January A.D. 1), since we're not exposing it.
3619 * We're only building the value so we can turn around and get the
3620 * normalised values for the year, month, day-of-month, and day-of-year.
3621 *
3622 * For going backward, we need to bias the value we're using so that we find
3623 * the right year value. (Basically, we don't want the contribution of
3624 * March 1st to the number to apply while deriving the year). Having done
3625 * that, we 'count up' the contribution to the year number by accounting for
3626 * full quadracenturies (400-year periods) with their extra leap days, plus
3627 * the contribution from full centuries (to avoid counting in the lost leap
3628 * days), plus the contribution from full quad-years (to count in the normal
3629 * leap days), plus the leftover contribution from any non-leap years.
3630 * At this point, if we were working with an actual leap day, we'll have 0
3631 * days left over. This is also true for March 1st, however. So, we have
3632 * to special-case that result, and (earlier) keep track of the 'odd'
3633 * century and year contributions. If we got 4 extra centuries in a qcent,
3634 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3635 * Otherwise, we add back in the earlier bias we removed (the 123 from
3636 * figuring in March 1st), find the month index (integer division by 30.6),
3637 * and the remainder is the day-of-month. We then have to convert back to
3638 * 'real' months (including fixing January and February from being 14/15 in
3639 * the previous year to being in the proper year). After that, to get
3640 * tm_yday, we work with the normalised year and get a new yearday value for
3641 * January 1st, which we subtract from the yearday value we had earlier,
3642 * representing the date we've re-built. This is done from January 1
3643 * because tm_yday is 0-origin.
3644 *
3645 * Since POSIX time routines are only guaranteed to work for times since the
3646 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3647 * applies Gregorian calendar rules even to dates before the 16th century
3648 * doesn't bother me. Besides, you'd need cultural context for a given
3649 * date to know whether it was Julian or Gregorian calendar, and that's
3650 * outside the scope for this routine. Since we convert back based on the
3651 * same rules we used to build the yearday, you'll only get strange results
3652 * for input which needed normalising, or for the 'odd' century years which
3653 * were leap years in the Julian calander but not in the Gregorian one.
3654 * I can live with that.
3655 *
3656 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3657 * that's still outside the scope for POSIX time manipulation, so I don't
3658 * care.
3659 */
3660
3661 year = 1900 + ptm->tm_year;
3662 month = ptm->tm_mon;
3663 mday = ptm->tm_mday;
3664 /* allow given yday with no month & mday to dominate the result */
3665 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3666 month = 0;
3667 mday = 0;
3668 jday = 1 + ptm->tm_yday;
3669 }
3670 else {
3671 jday = 0;
3672 }
3673 if (month >= 2)
3674 month+=2;
3675 else
3676 month+=14, year--;
3677 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3678 yearday += month*MONTH_TO_DAYS + mday + jday;
3679 /*
3680 * Note that we don't know when leap-seconds were or will be,
3681 * so we have to trust the user if we get something which looks
3682 * like a sensible leap-second. Wild values for seconds will
3683 * be rationalised, however.
3684 */
3685 if ((unsigned) ptm->tm_sec <= 60) {
3686 secs = 0;
3687 }
3688 else {
3689 secs = ptm->tm_sec;
3690 ptm->tm_sec = 0;
3691 }
3692 secs += 60 * ptm->tm_min;
3693 secs += SECS_PER_HOUR * ptm->tm_hour;
3694 if (secs < 0) {
3695 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3696 /* got negative remainder, but need positive time */
3697 /* back off an extra day to compensate */
3698 yearday += (secs/SECS_PER_DAY)-1;
3699 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3700 }
3701 else {
3702 yearday += (secs/SECS_PER_DAY);
3703 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3704 }
3705 }
3706 else if (secs >= SECS_PER_DAY) {
3707 yearday += (secs/SECS_PER_DAY);
3708 secs %= SECS_PER_DAY;
3709 }
3710 ptm->tm_hour = secs/SECS_PER_HOUR;
3711 secs %= SECS_PER_HOUR;
3712 ptm->tm_min = secs/60;
3713 secs %= 60;
3714 ptm->tm_sec += secs;
3715 /* done with time of day effects */
3716 /*
3717 * The algorithm for yearday has (so far) left it high by 428.
3718 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3719 * bias it by 123 while trying to figure out what year it
3720 * really represents. Even with this tweak, the reverse
3721 * translation fails for years before A.D. 0001.
3722 * It would still fail for Feb 29, but we catch that one below.
3723 */
3724 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3725 yearday -= YEAR_ADJUST;
3726 year = (yearday / DAYS_PER_QCENT) * 400;
3727 yearday %= DAYS_PER_QCENT;
3728 odd_cent = yearday / DAYS_PER_CENT;
3729 year += odd_cent * 100;
3730 yearday %= DAYS_PER_CENT;
3731 year += (yearday / DAYS_PER_QYEAR) * 4;
3732 yearday %= DAYS_PER_QYEAR;
3733 odd_year = yearday / DAYS_PER_YEAR;
3734 year += odd_year;
3735 yearday %= DAYS_PER_YEAR;
3736 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3737 month = 1;
3738 yearday = 29;
3739 }
3740 else {
3741 yearday += YEAR_ADJUST; /* recover March 1st crock */
3742 month = yearday*DAYS_TO_MONTH;
3743 yearday -= month*MONTH_TO_DAYS;
3744 /* recover other leap-year adjustment */
3745 if (month > 13) {
3746 month-=14;
3747 year++;
3748 }
3749 else {
3750 month-=2;
3751 }
3752 }
3753 ptm->tm_year = year - 1900;
3754 if (yearday) {
3755 ptm->tm_mday = yearday;
3756 ptm->tm_mon = month;
3757 }
3758 else {
3759 ptm->tm_mday = 31;
3760 ptm->tm_mon = month - 1;
3761 }
3762 /* re-build yearday based on Jan 1 to get tm_yday */
3763 year--;
3764 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3765 yearday += 14*MONTH_TO_DAYS + 1;
3766 ptm->tm_yday = jday - yearday;
3767 /* fix tm_wday if not overridden by caller */
3768 if ((unsigned)ptm->tm_wday > 6)
3769 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3770}
b3c85772
JH		 3771
3772char *
e1ec3a88 3773Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
b3c85772
JH		 3774{
3775#ifdef HAS_STRFTIME
3776 char *buf;
3777 int buflen;
3778 struct tm mytm;
3779 int len;
3780
3781 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3782 mytm.tm_sec = sec;
3783 mytm.tm_min = min;
3784 mytm.tm_hour = hour;
3785 mytm.tm_mday = mday;
3786 mytm.tm_mon = mon;
3787 mytm.tm_year = year;
3788 mytm.tm_wday = wday;
3789 mytm.tm_yday = yday;
3790 mytm.tm_isdst = isdst;
3791 mini_mktime(&mytm);
c473feec
SR		 3792 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3793#if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3794 STMT_START {
3795 struct tm mytm2;
3796 mytm2 = mytm;
3797 mktime(&mytm2);
3798#ifdef HAS_TM_TM_GMTOFF
3799 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3800#endif
3801#ifdef HAS_TM_TM_ZONE
3802 mytm.tm_zone = mytm2.tm_zone;
3803#endif
3804 } STMT_END;
3805#endif
b3c85772 3806 buflen = 64;
a02a5408 3807 Newx(buf, buflen, char);
b3c85772
JH		 3808 len = strftime(buf, buflen, fmt, &mytm);
3809 /*
877f6a72 3810 ** The following is needed to handle to the situation where
b3c85772
JH		 3811 ** tmpbuf overflows. Basically we want to allocate a buffer
3812 ** and try repeatedly. The reason why it is so complicated
3813 ** is that getting a return value of 0 from strftime can indicate
3814 ** one of the following:
3815 ** 1. buffer overflowed,
3816 ** 2. illegal conversion specifier, or
3817 ** 3. the format string specifies nothing to be returned(not
3818 ** an error). This could be because format is an empty string
3819 ** or it specifies %p that yields an empty string in some locale.
3820 ** If there is a better way to make it portable, go ahead by
3821 ** all means.
3822 */
3823 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3824 return buf;
3825 else {
3826 /* Possibly buf overflowed - try again with a bigger buf */
e1ec3a88
AL		 3827 const int fmtlen = strlen(fmt);
3828 const int bufsize = fmtlen + buflen;
877f6a72 3829
a02a5408 3830 Newx(buf, bufsize, char);
b3c85772
JH		 3831 while (buf) {
3832 buflen = strftime(buf, bufsize, fmt, &mytm);
3833 if (buflen > 0 && buflen < bufsize)
3834 break;
3835 /* heuristic to prevent out-of-memory errors */
3836 if (bufsize > 100*fmtlen) {
3837 Safefree(buf);
3838 buf = NULL;
3839 break;
3840 }
e1ec3a88 3841 Renew(buf, bufsize*2, char);
b3c85772
JH		 3842 }
3843 return buf;
3844 }
3845#else
3846 Perl_croak(aTHX_ "panic: no strftime");
27da23d5 3847 return NULL;
b3c85772
JH		 3848#endif
3849}
3850
877f6a72
NIS		 3851
3852#define SV_CWD_RETURN_UNDEF \
3853sv_setsv(sv, &PL_sv_undef); \
3854return FALSE
3855
3856#define SV_CWD_ISDOT(dp) \
3857 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3aed30dc 3858 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
877f6a72
NIS		 3859
3860/*
ccfc67b7
JH		 3861=head1 Miscellaneous Functions
3862
89423764 3863=for apidoc getcwd_sv
877f6a72
NIS		 3864
3865Fill the sv with current working directory
3866
3867=cut
3868*/
3869
3870/* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3871 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3872 * getcwd(3) if available
3873 * Comments from the orignal:
3874 * This is a faster version of getcwd. It's also more dangerous
3875 * because you might chdir out of a directory that you can't chdir
3876 * back into. */
3877
877f6a72 3878int
89423764 3879Perl_getcwd_sv(pTHX_ register SV *sv)
877f6a72
NIS		 3880{
3881#ifndef PERL_MICRO
97aff369 3882 dVAR;
ea715489
JH		 3883#ifndef INCOMPLETE_TAINTS
3884 SvTAINTED_on(sv);
3885#endif
3886
8f95b30d
JH		 3887#ifdef HAS_GETCWD
3888 {
60e110a8
DM		 3889 char buf[MAXPATHLEN];
3890
3aed30dc 3891 /* Some getcwd()s automatically allocate a buffer of the given
60e110a8
DM		 3892 * size from the heap if they are given a NULL buffer pointer.
3893 * The problem is that this behaviour is not portable. */
3aed30dc 3894 if (getcwd(buf, sizeof(buf) - 1)) {
42d9b98d 3895 sv_setpv(sv, buf);
3aed30dc
HS		 3896 return TRUE;
3897 }
3898 else {
3899 sv_setsv(sv, &PL_sv_undef);
3900 return FALSE;
3901 }
8f95b30d
JH		 3902 }
3903
3904#else
3905
c623ac67 3906 Stat_t statbuf;
877f6a72 3907 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
4373e329 3908 int pathlen=0;
877f6a72 3909 Direntry_t *dp;
877f6a72 3910
862a34c6 3911 SvUPGRADE(sv, SVt_PV);
877f6a72 3912
877f6a72 3913 if (PerlLIO_lstat(".", &statbuf) < 0) {
3aed30dc 3914 SV_CWD_RETURN_UNDEF;
877f6a72
NIS		 3915 }
3916
3917 orig_cdev = statbuf.st_dev;
3918 orig_cino = statbuf.st_ino;
3919 cdev = orig_cdev;
3920 cino = orig_cino;
3921
3922 for (;;) {
4373e329 3923 DIR *dir;
3aed30dc
HS		 3924 odev = cdev;
3925 oino = cino;
3926
3927 if (PerlDir_chdir("..") < 0) {
3928 SV_CWD_RETURN_UNDEF;
3929 }
3930 if (PerlLIO_stat(".", &statbuf) < 0) {
3931 SV_CWD_RETURN_UNDEF;
3932 }
3933
3934 cdev = statbuf.st_dev;
3935 cino = statbuf.st_ino;
3936
3937 if (odev == cdev && oino == cino) {
3938 break;
3939 }
3940 if (!(dir = PerlDir_open("."))) {
3941 SV_CWD_RETURN_UNDEF;
3942 }
3943
3944 while ((dp = PerlDir_read(dir)) != NULL) {
877f6a72 3945#ifdef DIRNAMLEN
4373e329 3946 const int namelen = dp->d_namlen;
877f6a72 3947#else
4373e329 3948 const int namelen = strlen(dp->d_name);
877f6a72 3949#endif
3aed30dc
HS		 3950 /* skip . and .. */
3951 if (SV_CWD_ISDOT(dp)) {
3952 continue;
3953 }
3954
3955 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
3956 SV_CWD_RETURN_UNDEF;
3957 }
3958
3959 tdev = statbuf.st_dev;
3960 tino = statbuf.st_ino;
3961 if (tino == oino && tdev == odev) {
3962 break;
3963 }
cb5953d6
JH		 3964 }
3965
3aed30dc
HS		 3966 if (!dp) {
3967 SV_CWD_RETURN_UNDEF;
3968 }
3969
3970 if (pathlen + namelen + 1 >= MAXPATHLEN) {
3971 SV_CWD_RETURN_UNDEF;
3972 }
877f6a72 3973
3aed30dc
HS		 3974 SvGROW(sv, pathlen + namelen + 1);
3975
3976 if (pathlen) {
3977 /* shift down */
95a20fc0 3978 Move(SvPVX_const(sv), SvPVX(sv) + namelen + 1, pathlen, char);
3aed30dc 3979 }
877f6a72 3980
3aed30dc
HS		 3981 /* prepend current directory to the front */
3982 *SvPVX(sv) = '/';
3983 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
3984 pathlen += (namelen + 1);
877f6a72
NIS		 3985
3986#ifdef VOID_CLOSEDIR
3aed30dc 3987 PerlDir_close(dir);
877f6a72 3988#else
3aed30dc
HS		 3989 if (PerlDir_close(dir) < 0) {
3990 SV_CWD_RETURN_UNDEF;
3991 }
877f6a72
NIS		 3992#endif
3993 }
3994
60e110a8 3995 if (pathlen) {
3aed30dc
HS		 3996 SvCUR_set(sv, pathlen);
3997 *SvEND(sv) = '\0';
3998 SvPOK_only(sv);
877f6a72 3999
95a20fc0 4000 if (PerlDir_chdir(SvPVX_const(sv)) < 0) {
3aed30dc
HS		 4001 SV_CWD_RETURN_UNDEF;
4002 }
877f6a72
NIS		 4003 }
4004 if (PerlLIO_stat(".", &statbuf) < 0) {
3aed30dc 4005 SV_CWD_RETURN_UNDEF;
877f6a72
NIS		 4006 }
4007
4008 cdev = statbuf.st_dev;
4009 cino = statbuf.st_ino;
4010
4011 if (cdev != orig_cdev || cino != orig_cino) {
3aed30dc
HS		 4012 Perl_croak(aTHX_ "Unstable directory path, "
4013 "current directory changed unexpectedly");
877f6a72 4014 }
877f6a72
NIS		 4015
4016 return TRUE;
793b8d8e
JH		 4017#endif
4018
877f6a72
NIS		 4019#else
4020 return FALSE;
4021#endif
4022}
4023
f4758303 4024/*
b0f01acb
JP		 4025=for apidoc scan_version
4026
4027Returns a pointer to the next character after the parsed
4028version string, as well as upgrading the passed in SV to
4029an RV.
4030
4031Function must be called with an already existing SV like
4032
137d6fc0
JP		 4033 sv = newSV(0);
4034 s = scan_version(s,SV *sv, bool qv);
b0f01acb
JP		 4035
4036Performs some preprocessing to the string to ensure that
4037it has the correct characteristics of a version. Flags the
4038object if it contains an underscore (which denotes this
137d6fc0
JP		 4039is a alpha version). The boolean qv denotes that the version
4040should be interpreted as if it had multiple decimals, even if
4041it doesn't.
b0f01acb
JP		 4042
4043=cut
4044*/
4045
9137345a 4046const char *
e1ec3a88 4047Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv)
b0f01acb 4048{
e0218a61 4049 const char *start;
9137345a
JP		 4050 const char *pos;
4051 const char *last;
4052 int saw_period = 0;
cb5772bb 4053 int alpha = 0;
9137345a 4054 int width = 3;
7452cf6a
AL		 4055 AV * const av = newAV();
4056 SV * const hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
9137345a 4057 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
cb5772bb 4058
3a242bf8
NC		 4059#ifndef NODEFAULT_SHAREKEYS
4060 HvSHAREKEYS_on(hv); /* key-sharing on by default */
4061#endif
9137345a 4062
e0218a61
JP		 4063 while (isSPACE(*s)) /* leading whitespace is OK */
4064 s++;
4065
9137345a
JP		 4066 if (*s == 'v') {
4067 s++; /* get past 'v' */
4068 qv = 1; /* force quoted version processing */
4069 }
4070
e0218a61 4071 start = last = pos = s;
9137345a
JP		 4072
4073 /* pre-scan the input string to check for decimals/underbars */
ad63d80f
JP		 4074 while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) )
4075 {
4076 if ( *pos == '.' )
4077 {
cb5772bb 4078 if ( alpha )
5f89c282 4079 Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
ad63d80f 4080 saw_period++ ;
9137345a 4081 last = pos;
46314c13 4082 }
ad63d80f
JP		 4083 else if ( *pos == '_' )
4084 {
cb5772bb 4085 if ( alpha )
5f89c282 4086 Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
cb5772bb 4087 alpha = 1;
9137345a 4088 width = pos - last - 1; /* natural width of sub-version */
ad63d80f
JP		 4089 }
4090 pos++;
4091 }
ad63d80f 4092
34ba6322
SP		 4093 if ( alpha && !saw_period )
4094 Perl_croak(aTHX_ "Invalid version format (alpha without decimal)");
4095
e0218a61 4096 if ( saw_period > 1 )
137d6fc0 4097 qv = 1; /* force quoted version processing */
9137345a
JP		 4098
4099 pos = s;
4100
4101 if ( qv )
cb5772bb
RGS		 4102 hv_store((HV *)hv, "qv", 2, newSViv(qv), 0);
4103 if ( alpha )
4104 hv_store((HV *)hv, "alpha", 5, newSViv(alpha), 0);
9137345a
JP		 4105 if ( !qv && width < 3 )
4106 hv_store((HV *)hv, "width", 5, newSViv(width), 0);
4107
ad63d80f 4108 while (isDIGIT(*pos))
46314c13 4109 pos++;
ad63d80f
JP		 4110 if (!isALPHA(*pos)) {
4111 I32 rev;
4112
ad63d80f
JP		 4113 for (;;) {
4114 rev = 0;
4115 {
129318bd 4116 /* this is atoi() that delimits on underscores */
9137345a 4117 const char *end = pos;
129318bd
JP		 4118 I32 mult = 1;
4119 I32 orev;
9137345a 4120
129318bd
JP		 4121 /* the following if() will only be true after the decimal
4122 * point of a version originally created with a bare
4123 * floating point number, i.e. not quoted in any way
4124 */
e0218a61 4125 if ( !qv && s > start && saw_period == 1 ) {
c76df65e 4126 mult *= 100;
129318bd
JP		 4127 while ( s < end ) {
4128 orev = rev;
4129 rev += (*s - '0') * mult;
4130 mult /= 10;
32fdb065 4131 if ( PERL_ABS(orev) > PERL_ABS(rev) )
129318bd
JP		 4132 Perl_croak(aTHX_ "Integer overflow in version");
4133 s++;
9137345a
JP		 4134 if ( *s == '_' )
4135 s++;
129318bd
JP		 4136 }
4137 }
4138 else {
4139 while (--end >= s) {
4140 orev = rev;
4141 rev += (*end - '0') * mult;
4142 mult *= 10;
32fdb065 4143 if ( PERL_ABS(orev) > PERL_ABS(rev) )
129318bd
JP		 4144 Perl_croak(aTHX_ "Integer overflow in version");
4145 }
4146 }
4147 }
9137345a 4148
129318bd 4149 /* Append revision */
9137345a 4150 av_push(av, newSViv(rev));
c8a14fb6 4151 if ( *pos == '.' )
9137345a
JP		 4152 s = ++pos;
4153 else if ( *pos == '_' && isDIGIT(pos[1]) )
ad63d80f
JP		 4154 s = ++pos;
4155 else if ( isDIGIT(*pos) )
4156 s = pos;
b0f01acb 4157 else {
ad63d80f
JP		 4158 s = pos;
4159 break;
4160 }
9137345a
JP		 4161 if ( qv ) {
4162 while ( isDIGIT(*pos) )
4163 pos++;
4164 }
4165 else {
4166 int digits = 0;
4167 while ( ( isDIGIT(*pos) || *pos == '_' ) && digits < 3 ) {
4168 if ( *pos != '_' )
4169 digits++;
4170 pos++;
4171 }
b0f01acb
JP		 4172 }
4173 }
4174 }
9137345a
JP		 4175 if ( qv ) { /* quoted versions always get at least three terms*/
4176 I32 len = av_len(av);
4edfc503
NC		 4177 /* This for loop appears to trigger a compiler bug on OS X, as it
4178 loops infinitely. Yes, len is negative. No, it makes no sense.
4179 Compiler in question is:
4180 gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
4181 for ( len = 2 - len; len > 0; len-- )
4182 av_push((AV *)sv, newSViv(0));
4183 */
4184 len = 2 - len;
4185 while (len-- > 0)
9137345a 4186 av_push(av, newSViv(0));
b9381830 4187 }
9137345a
JP		 4188
4189 if ( av_len(av) == -1 ) /* oops, someone forgot to pass a value */
4190 av_push(av, newSViv(0));
4191
4192 /* And finally, store the AV in the hash */
cb5772bb 4193 hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0);
9137345a 4194 return s;
b0f01acb
JP		 4195}
4196
4197/*
4198=for apidoc new_version
4199
4200Returns a new version object based on the passed in SV:
4201
4202 SV *sv = new_version(SV *ver);
4203
4204Does not alter the passed in ver SV. See "upg_version" if you
4205want to upgrade the SV.
4206
4207=cut
4208*/
4209
4210SV *
4211Perl_new_version(pTHX_ SV *ver)
4212{
97aff369 4213 dVAR;
2d03de9c 4214 SV * const rv = newSV(0);
d7aa5382
JP		 4215 if ( sv_derived_from(ver,"version") ) /* can just copy directly */
4216 {
4217 I32 key;
53c1dcc0 4218 AV * const av = newAV();
9137345a
JP		 4219 AV *sav;
4220 /* This will get reblessed later if a derived class*/
e0218a61 4221 SV * const hv = newSVrv(rv, "version");
9137345a 4222 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
3a242bf8
NC		 4223#ifndef NODEFAULT_SHAREKEYS
4224 HvSHAREKEYS_on(hv); /* key-sharing on by default */
4225#endif
9137345a
JP		 4226
4227 if ( SvROK(ver) )
4228 ver = SvRV(ver);
4229
4230 /* Begin copying all of the elements */
4231 if ( hv_exists((HV *)ver, "qv", 2) )
4232 hv_store((HV *)hv, "qv", 2, &PL_sv_yes, 0);
4233
4234 if ( hv_exists((HV *)ver, "alpha", 5) )
4235 hv_store((HV *)hv, "alpha", 5, &PL_sv_yes, 0);
4236
4237 if ( hv_exists((HV*)ver, "width", 5 ) )
d7aa5382 4238 {
017a3ce5 4239 const I32 width = SvIV(*hv_fetchs((HV*)ver, "width", FALSE));
9137345a 4240 hv_store((HV *)hv, "width", 5, newSViv(width), 0);
d7aa5382 4241 }
9137345a 4242
017a3ce5 4243 sav = (AV *)SvRV(*hv_fetchs((HV*)ver, "version", FALSE));
9137345a
JP		 4244 /* This will get reblessed later if a derived class*/
4245 for ( key = 0; key <= av_len(sav); key++ )
4246 {
4247 const I32 rev = SvIV(*av_fetch(sav, key, FALSE));
4248 av_push(av, newSViv(rev));
4249 }
4250
cb5772bb 4251 hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0);
d7aa5382
JP		 4252 return rv;
4253 }
ad63d80f 4254#ifdef SvVOK
4f2da183 4255 {
3c21775b 4256 const MAGIC* const mg = SvVSTRING_mg(ver);
4f2da183
NC		 4257 if ( mg ) { /* already a v-string */
4258 const STRLEN len = mg->mg_len;
4259 char * const version = savepvn( (const char*)mg->mg_ptr, len);
4260 sv_setpvn(rv,version,len);
4261 Safefree(version);
4262 }
4263 else {
ad63d80f 4264#endif
4f2da183 4265 sv_setsv(rv,ver); /* make a duplicate */
137d6fc0 4266#ifdef SvVOK
4f2da183 4267 }
26ec6fc3 4268 }
137d6fc0 4269#endif
2593c6c6 4270 return upg_version(rv);
b0f01acb
JP		 4271}
4272
4273/*
4274=for apidoc upg_version
4275
4276In-place upgrade of the supplied SV to a version object.
4277
4278 SV *sv = upg_version(SV *sv);
4279
4280Returns a pointer to the upgraded SV.
4281
4282=cut
4283*/
4284
4285SV *
ad63d80f 4286Perl_upg_version(pTHX_ SV *ver)
b0f01acb 4287{
cd57dc11 4288 const char *version, *s;
137d6fc0 4289 bool qv = 0;
4f2da183
NC		 4290#ifdef SvVOK
4291 const MAGIC *mg;
4292#endif
137d6fc0
JP		 4293
4294 if ( SvNOK(ver) ) /* may get too much accuracy */
4295 {
4296 char tbuf[64];
c8a14fb6
RGS		 4297 STRLEN len = my_snprintf(tbuf, sizeof(tbuf), "%.9"NVff, SvNVX(ver));
4298 while (tbuf[len-1] == '0' && len > 0) len--;
86c11942 4299 version = savepvn(tbuf, len);
137d6fc0 4300 }
ad63d80f 4301#ifdef SvVOK
666cce26 4302 else if ( (mg = SvVSTRING_mg(ver)) ) { /* already a v-string */
ad63d80f 4303 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
137d6fc0 4304 qv = 1;
b0f01acb 4305 }
ad63d80f 4306#endif
137d6fc0
JP		 4307 else /* must be a string or something like a string */
4308 {
9137345a 4309 version = savepv(SvPV_nolen(ver));
137d6fc0 4310 }
cd57dc11 4311 s = scan_version(version, ver, qv);
808ee47e
SP		 4312 if ( *s != '\0' )
4313 if(ckWARN(WARN_MISC))
4314 Perl_warner(aTHX_ packWARN(WARN_MISC),
4315 "Version string '%s' contains invalid data; "
4316 "ignoring: '%s'", version, s);
137d6fc0 4317 Safefree(version);
ad63d80f 4318 return ver;
b0f01acb
JP		 4319}
4320
e0218a61
JP		 4321/*
4322=for apidoc vverify
4323
4324Validates that the SV contains a valid version object.
4325
4326 bool vverify(SV *vobj);
4327
4328Note that it only confirms the bare minimum structure (so as not to get
4329confused by derived classes which may contain additional hash entries):
4330
4331=over 4
4332
cb5772bb 4333=item * The SV contains a [reference to a] hash
e0218a61
JP		 4334
4335=item * The hash contains a "version" key
4336
cb5772bb 4337=item * The "version" key has [a reference to] an AV as its value
e0218a61
JP		 4338
4339=back
4340
4341=cut
4342*/
4343
4344bool
4345Perl_vverify(pTHX_ SV *vs)
4346{
4347 SV *sv;
4348 if ( SvROK(vs) )
4349 vs = SvRV(vs);
4350
4351 /* see if the appropriate elements exist */
4352 if ( SvTYPE(vs) == SVt_PVHV
4353 && hv_exists((HV*)vs, "version", 7)
017a3ce5 4354 && (sv = SvRV(*hv_fetchs((HV*)vs, "version", FALSE)))
e0218a61
JP		 4355 && SvTYPE(sv) == SVt_PVAV )
4356 return TRUE;
4357 else
4358 return FALSE;
4359}
b0f01acb
JP		 4360
4361/*
4362=for apidoc vnumify
4363
ad63d80f
JP		 4364Accepts a version object and returns the normalized floating
4365point representation. Call like:
b0f01acb 4366
ad63d80f 4367 sv = vnumify(rv);
b0f01acb 4368
ad63d80f
JP		 4369NOTE: you can pass either the object directly or the SV
4370contained within the RV.
b0f01acb
JP		 4371
4372=cut
4373*/
4374
4375SV *
ad63d80f 4376Perl_vnumify(pTHX_ SV *vs)
b0f01acb 4377{
ad63d80f 4378 I32 i, len, digit;
9137345a
JP		 4379 int width;
4380 bool alpha = FALSE;
53c1dcc0 4381 SV * const sv = newSV(0);
9137345a 4382 AV *av;
ad63d80f
JP		 4383 if ( SvROK(vs) )
4384 vs = SvRV(vs);
9137345a 4385
e0218a61
JP		 4386 if ( !vverify(vs) )
4387 Perl_croak(aTHX_ "Invalid version object");
4388
9137345a
JP		 4389 /* see if various flags exist */
4390 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4391 alpha = TRUE;
4392 if ( hv_exists((HV*)vs, "width", 5 ) )
017a3ce5 4393 width = SvIV(*hv_fetchs((HV*)vs, "width", FALSE));
9137345a
JP		 4394 else
4395 width = 3;
4396
4397
4398 /* attempt to retrieve the version array */
017a3ce5 4399 if ( !(av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE)) ) ) {
396482e1 4400 sv_catpvs(sv,"0");
9137345a
JP		 4401 return sv;
4402 }
4403
4404 len = av_len(av);
46314c13
JP		 4405 if ( len == -1 )
4406 {
396482e1 4407 sv_catpvs(sv,"0");
46314c13
JP		 4408 return sv;
4409 }
9137345a
JP		 4410
4411 digit = SvIV(*av_fetch(av, 0, 0));
261fcdab 4412 Perl_sv_setpvf(aTHX_ sv, "%d.", (int)PERL_ABS(digit));
13f8f398 4413 for ( i = 1 ; i < len ; i++ )
b0f01acb 4414 {
9137345a
JP		 4415 digit = SvIV(*av_fetch(av, i, 0));
4416 if ( width < 3 ) {
43eaf59d 4417 const int denom = (width == 2 ? 10 : 100);
53c1dcc0 4418 const div_t term = div((int)PERL_ABS(digit),denom);
261fcdab 4419 Perl_sv_catpvf(aTHX_ sv, "%0*d_%d", width, term.quot, term.rem);
9137345a
JP		 4420 }
4421 else {
261fcdab 4422 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
9137345a 4423 }
b0f01acb 4424 }
13f8f398
JP		 4425
4426 if ( len > 0 )
4427 {
9137345a
JP		 4428 digit = SvIV(*av_fetch(av, len, 0));
4429 if ( alpha && width == 3 ) /* alpha version */
396482e1 4430 sv_catpvs(sv,"_");
261fcdab 4431 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
13f8f398 4432 }
e0218a61 4433 else /* len == 0 */
13f8f398 4434 {
396482e1 4435 sv_catpvs(sv, "000");
13f8f398 4436 }
b0f01acb
JP		 4437 return sv;
4438}
4439
4440/*
b9381830 4441=for apidoc vnormal
b0f01acb 4442
ad63d80f
JP		 4443Accepts a version object and returns the normalized string
4444representation. Call like:
b0f01acb 4445
b9381830 4446 sv = vnormal(rv);
b0f01acb 4447
ad63d80f
JP		 4448NOTE: you can pass either the object directly or the SV
4449contained within the RV.
b0f01acb
JP		 4450
4451=cut
4452*/
4453
4454SV *
b9381830 4455Perl_vnormal(pTHX_ SV *vs)
b0f01acb 4456{
ad63d80f 4457 I32 i, len, digit;
9137345a 4458 bool alpha = FALSE;
2d03de9c 4459 SV * const sv = newSV(0);
9137345a 4460 AV *av;
ad63d80f
JP		 4461 if ( SvROK(vs) )
4462 vs = SvRV(vs);
9137345a 4463
e0218a61
JP		 4464 if ( !vverify(vs) )
4465 Perl_croak(aTHX_ "Invalid version object");
4466
9137345a
JP		 4467 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4468 alpha = TRUE;
017a3ce5 4469 av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE));
9137345a
JP		 4470
4471 len = av_len(av);
e0218a61
JP		 4472 if ( len == -1 )
4473 {
396482e1 4474 sv_catpvs(sv,"");
46314c13
JP		 4475 return sv;
4476 }
9137345a 4477 digit = SvIV(*av_fetch(av, 0, 0));
261fcdab 4478 Perl_sv_setpvf(aTHX_ sv, "v%"IVdf, (IV)digit);
cb5772bb 4479 for ( i = 1 ; i < len ; i++ ) {
9137345a 4480 digit = SvIV(*av_fetch(av, i, 0));
261fcdab 4481 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
9137345a
JP		 4482 }
4483
e0218a61
JP		 4484 if ( len > 0 )
4485 {
9137345a
JP		 4486 /* handle last digit specially */
4487 digit = SvIV(*av_fetch(av, len, 0));
4488 if ( alpha )
261fcdab 4489 Perl_sv_catpvf(aTHX_ sv, "_%"IVdf, (IV)digit);
ad63d80f 4490 else
261fcdab 4491 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
b0f01acb 4492 }
9137345a 4493
137d6fc0
JP		 4494 if ( len <= 2 ) { /* short version, must be at least three */
4495 for ( len = 2 - len; len != 0; len-- )
396482e1 4496 sv_catpvs(sv,".0");
137d6fc0 4497 }
b0f01acb 4498 return sv;
9137345a 4499}
b0f01acb 4500
ad63d80f 4501/*
b9381830
JP		 4502=for apidoc vstringify
4503
4504In order to maintain maximum compatibility with earlier versions
4505of Perl, this function will return either the floating point
4506notation or the multiple dotted notation, depending on whether
4507the original version contained 1 or more dots, respectively
4508
4509=cut
4510*/
4511
4512SV *
4513Perl_vstringify(pTHX_ SV *vs)
4514{
b9381830
JP		 4515 if ( SvROK(vs) )
4516 vs = SvRV(vs);
e0218a61
JP		 4517
4518 if ( !vverify(vs) )
4519 Perl_croak(aTHX_ "Invalid version object");
4520
9137345a 4521 if ( hv_exists((HV *)vs, "qv", 2) )
cb5772bb 4522 return vnormal(vs);
9137345a 4523 else
cb5772bb 4524 return vnumify(vs);
b9381830
JP		 4525}
4526
4527/*
ad63d80f
JP		 4528=for apidoc vcmp
4529
4530Version object aware cmp. Both operands must already have been
4531converted into version objects.
4532
4533=cut
4534*/
4535
4536int
9137345a 4537Perl_vcmp(pTHX_ SV *lhv, SV *rhv)
ad63d80f
JP		 4538{
4539 I32 i,l,m,r,retval;
9137345a
JP		 4540 bool lalpha = FALSE;
4541 bool ralpha = FALSE;
4542 I32 left = 0;
4543 I32 right = 0;
4544 AV *lav, *rav;
4545 if ( SvROK(lhv) )
4546 lhv = SvRV(lhv);
4547 if ( SvROK(rhv) )
4548 rhv = SvRV(rhv);
4549
e0218a61
JP		 4550 if ( !vverify(lhv) )
4551 Perl_croak(aTHX_ "Invalid version object");
4552
4553 if ( !vverify(rhv) )
4554 Perl_croak(aTHX_ "Invalid version object");
4555
9137345a 4556 /* get the left hand term */
017a3ce5 4557 lav = (AV *)SvRV(*hv_fetchs((HV*)lhv, "version", FALSE));
9137345a
JP		 4558 if ( hv_exists((HV*)lhv, "alpha", 5 ) )
4559 lalpha = TRUE;
4560
4561 /* and the right hand term */
017a3ce5 4562 rav = (AV *)SvRV(*hv_fetchs((HV*)rhv, "version", FALSE));
9137345a
JP		 4563 if ( hv_exists((HV*)rhv, "alpha", 5 ) )
4564 ralpha = TRUE;
4565
4566 l = av_len(lav);
4567 r = av_len(rav);
ad63d80f
JP		 4568 m = l < r ? l : r;
4569 retval = 0;
4570 i = 0;
4571 while ( i <= m && retval == 0 )
4572 {
9137345a
JP		 4573 left = SvIV(*av_fetch(lav,i,0));
4574 right = SvIV(*av_fetch(rav,i,0));
4575 if ( left < right )
ad63d80f 4576 retval = -1;
9137345a 4577 if ( left > right )
ad63d80f
JP		 4578 retval = +1;
4579 i++;
4580 }
4581
9137345a
JP		 4582 /* tiebreaker for alpha with identical terms */
4583 if ( retval == 0 && l == r && left == right && ( lalpha || ralpha ) )
4584 {
4585 if ( lalpha && !ralpha )
4586 {
4587 retval = -1;
4588 }
4589 else if ( ralpha && !lalpha)
4590 {
4591 retval = +1;
4592 }
4593 }
4594
137d6fc0 4595 if ( l != r && retval == 0 ) /* possible match except for trailing 0's */
129318bd 4596 {
137d6fc0 4597 if ( l < r )
129318bd 4598 {
137d6fc0
JP		 4599 while ( i <= r && retval == 0 )
4600 {
9137345a 4601 if ( SvIV(*av_fetch(rav,i,0)) != 0 )
137d6fc0
JP		 4602 retval = -1; /* not a match after all */
4603 i++;
4604 }
4605 }
4606 else
4607 {
4608 while ( i <= l && retval == 0 )
4609 {
9137345a 4610 if ( SvIV(*av_fetch(lav,i,0)) != 0 )
137d6fc0
JP		 4611 retval = +1; /* not a match after all */
4612 i++;
4613 }
129318bd
JP		 4614 }
4615 }
ad63d80f
JP		 4616 return retval;
4617}
4618
c95c94b1 4619#if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
2bc69dc4
NIS		 4620# define EMULATE_SOCKETPAIR_UDP
4621#endif
4622
4623#ifdef EMULATE_SOCKETPAIR_UDP
02fc2eee
NC		 4624static int
4625S_socketpair_udp (int fd[2]) {
e10bb1e9 4626 dTHX;
02fc2eee
NC		 4627 /* Fake a datagram socketpair using UDP to localhost. */
4628 int sockets[2] = {-1, -1};
4629 struct sockaddr_in addresses[2];
4630 int i;
3aed30dc 4631 Sock_size_t size = sizeof(struct sockaddr_in);
ae92b34e 4632 unsigned short port;
02fc2eee
NC		 4633 int got;
4634
3aed30dc 4635 memset(&addresses, 0, sizeof(addresses));
02fc2eee
NC		 4636 i = 1;
4637 do {
3aed30dc
HS		 4638 sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
4639 if (sockets[i] == -1)
4640 goto tidy_up_and_fail;
4641
4642 addresses[i].sin_family = AF_INET;
4643 addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4644 addresses[i].sin_port = 0; /* kernel choses port. */
4645 if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
4646 sizeof(struct sockaddr_in)) == -1)
4647 goto tidy_up_and_fail;
02fc2eee
NC		 4648 } while (i--);
4649
4650 /* Now have 2 UDP sockets. Find out which port each is connected to, and
4651 for each connect the other socket to it. */
4652 i = 1;
4653 do {
3aed30dc
HS		 4654 if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
4655 &size) == -1)
4656 goto tidy_up_and_fail;
4657 if (size != sizeof(struct sockaddr_in))
4658 goto abort_tidy_up_and_fail;
4659 /* !1 is 0, !0 is 1 */
4660 if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
4661 sizeof(struct sockaddr_in)) == -1)
4662 goto tidy_up_and_fail;
02fc2eee
NC		 4663 } while (i--);
4664
4665 /* Now we have 2 sockets connected to each other. I don't trust some other
4666 process not to have already sent a packet to us (by random) so send
4667 a packet from each to the other. */
4668 i = 1;
4669 do {
3aed30dc
HS		 4670 /* I'm going to send my own port number. As a short.
4671 (Who knows if someone somewhere has sin_port as a bitfield and needs
4672 this routine. (I'm assuming crays have socketpair)) */
4673 port = addresses[i].sin_port;
4674 got = PerlLIO_write(sockets[i], &port, sizeof(port));
4675 if (got != sizeof(port)) {
4676 if (got == -1)
4677 goto tidy_up_and_fail;
4678 goto abort_tidy_up_and_fail;
4679 }
02fc2eee
NC		 4680 } while (i--);
4681
4682 /* Packets sent. I don't trust them to have arrived though.
4683 (As I understand it Solaris TCP stack is multithreaded. Non-blocking
4684 connect to localhost will use a second kernel thread. In 2.6 the
4685 first thread running the connect() returns before the second completes,
4686 so EINPROGRESS> In 2.7 the improved stack is faster and connect()
4687 returns 0. Poor programs have tripped up. One poor program's authors'
4688 had a 50-1 reverse stock split. Not sure how connected these were.)
4689 So I don't trust someone not to have an unpredictable UDP stack.
4690 */
4691
4692 {
3aed30dc
HS		 4693 struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
4694 int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
4695 fd_set rset;
4696
4697 FD_ZERO(&rset);
ea407a0c
NC		 4698 FD_SET((unsigned int)sockets[0], &rset);
4699 FD_SET((unsigned int)sockets[1], &rset);
3aed30dc
HS		 4700
4701 got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
4702 if (got != 2 || !FD_ISSET(sockets[0], &rset)
4703 || !FD_ISSET(sockets[1], &rset)) {
4704 /* I hope this is portable and appropriate. */
4705 if (got == -1)
4706 goto tidy_up_and_fail;
4707 goto abort_tidy_up_and_fail;
4708 }
02fc2eee 4709 }
f4758303 4710
02fc2eee
NC		 4711 /* And the paranoia department even now doesn't trust it to have arrive
4712 (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
4713 {
3aed30dc
HS		 4714 struct sockaddr_in readfrom;
4715 unsigned short buffer[2];
02fc2eee 4716
3aed30dc
HS		 4717 i = 1;
4718 do {
02fc2eee 4719#ifdef MSG_DONTWAIT
3aed30dc
HS		 4720 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4721 sizeof(buffer), MSG_DONTWAIT,
4722 (struct sockaddr *) &readfrom, &size);
02fc2eee 4723#else
3aed30dc
HS		 4724 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4725 sizeof(buffer), 0,
4726 (struct sockaddr *) &readfrom, &size);
e10bb1e9 4727#endif
02fc2eee 4728
3aed30dc
HS		 4729 if (got == -1)
4730 goto tidy_up_and_fail;
4731 if (got != sizeof(port)
4732 || size != sizeof(struct sockaddr_in)
4733 /* Check other socket sent us its port. */
4734 || buffer[0] != (unsigned short) addresses[!i].sin_port
4735 /* Check kernel says we got the datagram from that socket */
4736 || readfrom.sin_family != addresses[!i].sin_family
4737 || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
4738 || readfrom.sin_port != addresses[!i].sin_port)
4739 goto abort_tidy_up_and_fail;
4740 } while (i--);
02fc2eee
NC		 4741 }
4742 /* My caller (my_socketpair) has validated that this is non-NULL */
4743 fd[0] = sockets[0];
4744 fd[1] = sockets[1];
4745 /* I hereby declare this connection open. May God bless all who cross
4746 her. */
4747 return 0;
4748
4749 abort_tidy_up_and_fail:
4750 errno = ECONNABORTED;
4751 tidy_up_and_fail:
4752 {
4373e329 4753 const int save_errno = errno;
3aed30dc
HS		 4754 if (sockets[0] != -1)
4755 PerlLIO_close(sockets[0]);
4756 if (sockets[1] != -1)
4757 PerlLIO_close(sockets[1]);
4758 errno = save_errno;
4759 return -1;
02fc2eee
NC		 4760 }
4761}
85ca448a 4762#endif /* EMULATE_SOCKETPAIR_UDP */
02fc2eee 4763
b5ac89c3 4764#if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
02fc2eee
NC		 4765int
4766Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4767 /* Stevens says that family must be AF_LOCAL, protocol 0.
2948e0bd 4768 I'm going to enforce that, then ignore it, and use TCP (or UDP). */
e10bb1e9 4769 dTHX;
02fc2eee
NC		 4770 int listener = -1;
4771 int connector = -1;
4772 int acceptor = -1;
4773 struct sockaddr_in listen_addr;
4774 struct sockaddr_in connect_addr;
4775 Sock_size_t size;
4776
50458334
JH		 4777 if (protocol
4778#ifdef AF_UNIX
4779 || family != AF_UNIX
4780#endif
3aed30dc
HS		 4781 ) {
4782 errno = EAFNOSUPPORT;
4783 return -1;
02fc2eee 4784 }
2948e0bd 4785 if (!fd) {
3aed30dc
HS		 4786 errno = EINVAL;
4787 return -1;
2948e0bd 4788 }
02fc2eee 4789
2bc69dc4 4790#ifdef EMULATE_SOCKETPAIR_UDP
02fc2eee 4791 if (type == SOCK_DGRAM)
3aed30dc 4792 return S_socketpair_udp(fd);
2bc69dc4 4793#endif
02fc2eee 4794
3aed30dc 4795 listener = PerlSock_socket(AF_INET, type, 0);
02fc2eee 4796 if (listener == -1)
3aed30dc
HS		 4797 return -1;
4798 memset(&listen_addr, 0, sizeof(listen_addr));
02fc2eee 4799 listen_addr.sin_family = AF_INET;
3aed30dc 4800 listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
02fc2eee 4801 listen_addr.sin_port = 0; /* kernel choses port. */
3aed30dc
HS		 4802 if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
4803 sizeof(listen_addr)) == -1)
4804 goto tidy_up_and_fail;
e10bb1e9 4805 if (PerlSock_listen(listener, 1) == -1)
3aed30dc 4806 goto tidy_up_and_fail;
02fc2eee 4807
3aed30dc 4808 connector = PerlSock_socket(AF_INET, type, 0);
02fc2eee 4809 if (connector == -1)
3aed30dc 4810 goto tidy_up_and_fail;
02fc2eee 4811 /* We want to find out the port number to connect to. */
3aed30dc
HS		 4812 size = sizeof(connect_addr);
4813 if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
4814 &size) == -1)
4815 goto tidy_up_and_fail;
4816 if (size != sizeof(connect_addr))
4817 goto abort_tidy_up_and_fail;
e10bb1e9 4818 if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
3aed30dc
HS		 4819 sizeof(connect_addr)) == -1)
4820 goto tidy_up_and_fail;
02fc2eee 4821
3aed30dc
HS		 4822 size = sizeof(listen_addr);
4823 acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
4824 &size);
02fc2eee 4825 if (acceptor == -1)
3aed30dc
HS		 4826 goto tidy_up_and_fail;
4827 if (size != sizeof(listen_addr))
4828 goto abort_tidy_up_and_fail;
4829 PerlLIO_close(listener);
02fc2eee
NC		 4830 /* Now check we are talking to ourself by matching port and host on the
4831 two sockets. */
3aed30dc
HS		 4832 if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
4833 &size) == -1)
4834 goto tidy_up_and_fail;
4835 if (size != sizeof(connect_addr)
4836 || listen_addr.sin_family != connect_addr.sin_family
4837 || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
4838 || listen_addr.sin_port != connect_addr.sin_port) {
4839 goto abort_tidy_up_and_fail;
02fc2eee
NC		 4840 }
4841 fd[0] = connector;
4842 fd[1] = acceptor;
4843 return 0;
4844
4845 abort_tidy_up_and_fail:
27da23d5
JH		 4846#ifdef ECONNABORTED
4847 errno = ECONNABORTED; /* This would be the standard thing to do. */
4848#else
4849# ifdef ECONNREFUSED
4850 errno = ECONNREFUSED; /* E.g. Symbian does not have ECONNABORTED. */
4851# else
4852 errno = ETIMEDOUT; /* Desperation time. */
4853# endif
4854#endif
02fc2eee
NC		 4855 tidy_up_and_fail:
4856 {
7452cf6a 4857 const int save_errno = errno;
3aed30dc
HS		 4858 if (listener != -1)
4859 PerlLIO_close(listener);
4860 if (connector != -1)
4861 PerlLIO_close(connector);
4862 if (acceptor != -1)
4863 PerlLIO_close(acceptor);
4864 errno = save_errno;
4865 return -1;
02fc2eee
NC		 4866 }
4867}
85ca448a 4868#else
48ea76d1
JH		 4869/* In any case have a stub so that there's code corresponding
4870 * to the my_socketpair in global.sym. */
4871int
4872Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
daf16542 4873#ifdef HAS_SOCKETPAIR
48ea76d1 4874 return socketpair(family, type, protocol, fd);
daf16542
JH		 4875#else
4876 return -1;
4877#endif
48ea76d1
JH		 4878}
4879#endif
4880
68795e93
NIS		 4881/*
4882
4883=for apidoc sv_nosharing
4884
4885Dummy routine which "shares" an SV when there is no sharing module present.
d5b2b27b
NC		 4886Or "locks" it. Or "unlocks" it. In other words, ignores its single SV argument.
4887Exists to avoid test for a NULL function pointer and because it could
4888potentially warn under some level of strict-ness.
68795e93
NIS		 4889
4890=cut
4891*/
4892
4893void
4894Perl_sv_nosharing(pTHX_ SV *sv)
4895{
96a5add6 4896 PERL_UNUSED_CONTEXT;
53c1dcc0 4897 PERL_UNUSED_ARG(sv);
68795e93
NIS		 4898}
4899
a05d7ebb 4900U32
e1ec3a88 4901Perl_parse_unicode_opts(pTHX_ const char **popt)
a05d7ebb 4902{
e1ec3a88 4903 const char *p = *popt;
a05d7ebb
JH		 4904 U32 opt = 0;
4905
4906 if (*p) {
4907 if (isDIGIT(*p)) {
4908 opt = (U32) atoi(p);
4909 while (isDIGIT(*p)) p++;
7c91f477 4910 if (*p && *p != '\n' && *p != '\r')
a05d7ebb
JH		 4911 Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
4912 }
4913 else {
4914 for (; *p; p++) {
4915 switch (*p) {
4916 case PERL_UNICODE_STDIN:
4917 opt |= PERL_UNICODE_STDIN_FLAG; break;
4918 case PERL_UNICODE_STDOUT:
4919 opt |= PERL_UNICODE_STDOUT_FLAG; break;
4920 case PERL_UNICODE_STDERR:
4921 opt |= PERL_UNICODE_STDERR_FLAG; break;
4922 case PERL_UNICODE_STD:
4923 opt |= PERL_UNICODE_STD_FLAG; break;
4924 case PERL_UNICODE_IN:
4925 opt |= PERL_UNICODE_IN_FLAG; break;
4926 case PERL_UNICODE_OUT:
4927 opt |= PERL_UNICODE_OUT_FLAG; break;
4928 case PERL_UNICODE_INOUT:
4929 opt |= PERL_UNICODE_INOUT_FLAG; break;
4930 case PERL_UNICODE_LOCALE:
4931 opt |= PERL_UNICODE_LOCALE_FLAG; break;
4932 case PERL_UNICODE_ARGV:
4933 opt |= PERL_UNICODE_ARGV_FLAG; break;
5a22a2bb
NC		 4934 case PERL_UNICODE_UTF8CACHEASSERT:
4935 opt |= PERL_UNICODE_UTF8CACHEASSERT_FLAG; break;
a05d7ebb 4936 default:
7c91f477
JH		 4937 if (*p != '\n' && *p != '\r')
4938 Perl_croak(aTHX_
4939 "Unknown Unicode option letter '%c'", *p);
a05d7ebb
JH		 4940 }
4941 }
4942 }
4943 }
4944 else
4945 opt = PERL_UNICODE_DEFAULT_FLAGS;
4946
4947 if (opt & ~PERL_UNICODE_ALL_FLAGS)
06e66572 4948 Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
a05d7ebb
JH		 4949 (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
4950
4951 *popt = p;
4952
4953 return opt;
4954}
4955
132efe8b
JH		 4956U32
4957Perl_seed(pTHX)
4958{
97aff369 4959 dVAR;
132efe8b
JH		 4960 /*
4961 * This is really just a quick hack which grabs various garbage
4962 * values. It really should be a real hash algorithm which
4963 * spreads the effect of every input bit onto every output bit,
4964 * if someone who knows about such things would bother to write it.
4965 * Might be a good idea to add that function to CORE as well.
4966 * No numbers below come from careful analysis or anything here,
4967 * except they are primes and SEED_C1 > 1E6 to get a full-width
4968 * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
4969 * probably be bigger too.
4970 */
4971#if RANDBITS > 16
4972# define SEED_C1 1000003
4973#define SEED_C4 73819
4974#else
4975# define SEED_C1 25747
4976#define SEED_C4 20639
4977#endif
4978#define SEED_C2 3
4979#define SEED_C3 269
4980#define SEED_C5 26107
4981
4982#ifndef PERL_NO_DEV_RANDOM
4983 int fd;
4984#endif
4985 U32 u;
4986#ifdef VMS
4987# include <starlet.h>
4988 /* when[] = (low 32 bits, high 32 bits) of time since epoch
4989 * in 100-ns units, typically incremented ever 10 ms. */
4990 unsigned int when[2];
4991#else
4992# ifdef HAS_GETTIMEOFDAY
4993 struct timeval when;
4994# else
4995 Time_t when;
4996# endif
4997#endif
4998
4999/* This test is an escape hatch, this symbol isn't set by Configure. */
5000#ifndef PERL_NO_DEV_RANDOM
5001#ifndef PERL_RANDOM_DEVICE
5002 /* /dev/random isn't used by default because reads from it will block
5003 * if there isn't enough entropy available. You can compile with
5004 * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there
5005 * is enough real entropy to fill the seed. */
5006# define PERL_RANDOM_DEVICE "/dev/urandom"
5007#endif
5008 fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0);
5009 if (fd != -1) {
27da23d5 5010 if (PerlLIO_read(fd, (void*)&u, sizeof u) != sizeof u)
132efe8b
JH		 5011 u = 0;
5012 PerlLIO_close(fd);
5013 if (u)
5014 return u;
5015 }
5016#endif
5017
5018#ifdef VMS
5019 _ckvmssts(sys$gettim(when));
5020 u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1];
5021#else
5022# ifdef HAS_GETTIMEOFDAY
5023 PerlProc_gettimeofday(&when,NULL);
5024 u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec;
5025# else
5026 (void)time(&when);
5027 u = (U32)SEED_C1 * when;
5028# endif
5029#endif
5030 u += SEED_C3 * (U32)PerlProc_getpid();
5031 u += SEED_C4 * (U32)PTR2UV(PL_stack_sp);
5032#ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */
5033 u += SEED_C5 * (U32)PTR2UV(&when);
5034#endif
5035 return u;
5036}
5037
bed60192 5038UV
a783c5f4 5039Perl_get_hash_seed(pTHX)
bed60192 5040{
97aff369 5041 dVAR;
e1ec3a88 5042 const char *s = PerlEnv_getenv("PERL_HASH_SEED");
bed60192
JH		 5043 UV myseed = 0;
5044
5045 if (s)
5046 while (isSPACE(*s)) s++;
5047 if (s && isDIGIT(*s))
5048 myseed = (UV)Atoul(s);
5049 else
5050#ifdef USE_HASH_SEED_EXPLICIT
5051 if (s)
5052#endif
5053 {
5054 /* Compute a random seed */
5055 (void)seedDrand01((Rand_seed_t)seed());
bed60192
JH		 5056 myseed = (UV)(Drand01() * (NV)UV_MAX);
5057#if RANDBITS < (UVSIZE * 8)
5058 /* Since there are not enough randbits to to reach all
5059 * the bits of a UV, the low bits might need extra
5060 * help. Sum in another random number that will
5061 * fill in the low bits. */
5062 myseed +=
5063 (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
5064#endif /* RANDBITS < (UVSIZE * 8) */
6cfd5ea7
JH		 5065 if (myseed == 0) { /* Superparanoia. */
5066 myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */
5067 if (myseed == 0)
5068 Perl_croak(aTHX_ "Your random numbers are not that random");
5069 }
bed60192 5070 }
008fb0c0 5071 PL_rehash_seed_set = TRUE;
bed60192
JH		 5072
5073 return myseed;
5074}
27da23d5 5075
ed221c57
AL		 5076#ifdef USE_ITHREADS
5077bool
5078Perl_stashpv_hvname_match(pTHX_ const COP *c, const HV *hv)
5079{
5080 const char * const stashpv = CopSTASHPV(c);
5081 const char * const name = HvNAME_get(hv);
96a5add6 5082 PERL_UNUSED_CONTEXT;
ed221c57
AL		 5083
5084 if (stashpv == name)
5085 return TRUE;
5086 if (stashpv && name)
5087 if (strEQ(stashpv, name))
5088 return TRUE;
5089 return FALSE;
5090}
5091#endif
5092
5093
27da23d5
JH		 5094#ifdef PERL_GLOBAL_STRUCT
5095
5096struct perl_vars *
5097Perl_init_global_struct(pTHX)
5098{
5099 struct perl_vars *plvarsp = NULL;
5100#ifdef PERL_GLOBAL_STRUCT
5101# define PERL_GLOBAL_STRUCT_INIT
5102# include "opcode.h" /* the ppaddr and check */
7452cf6a
AL		 5103 const IV nppaddr = sizeof(Gppaddr)/sizeof(Perl_ppaddr_t);
5104 const IV ncheck = sizeof(Gcheck) /sizeof(Perl_check_t);
27da23d5
JH		 5105# ifdef PERL_GLOBAL_STRUCT_PRIVATE
5106 /* PerlMem_malloc() because can't use even safesysmalloc() this early. */
5107 plvarsp = (struct perl_vars*)PerlMem_malloc(sizeof(struct perl_vars));
5108 if (!plvarsp)
5109 exit(1);
5110# else
5111 plvarsp = PL_VarsPtr;
5112# endif /* PERL_GLOBAL_STRUCT_PRIVATE */
aadb217d
JH		 5113# undef PERLVAR
5114# undef PERLVARA
5115# undef PERLVARI
5116# undef PERLVARIC
5117# undef PERLVARISC
27da23d5
JH		 5118# define PERLVAR(var,type) /**/
5119# define PERLVARA(var,n,type) /**/
5120# define PERLVARI(var,type,init) plvarsp->var = init;
5121# define PERLVARIC(var,type,init) plvarsp->var = init;
5122# define PERLVARISC(var,init) Copy(init, plvarsp->var, sizeof(init), char);
5123# include "perlvars.h"
5124# undef PERLVAR
5125# undef PERLVARA
5126# undef PERLVARI
5127# undef PERLVARIC
5128# undef PERLVARISC
5129# ifdef PERL_GLOBAL_STRUCT
5130 plvarsp->Gppaddr = PerlMem_malloc(nppaddr * sizeof(Perl_ppaddr_t));
5131 if (!plvarsp->Gppaddr)
5132 exit(1);
5133 plvarsp->Gcheck = PerlMem_malloc(ncheck * sizeof(Perl_check_t));
5134 if (!plvarsp->Gcheck)
5135 exit(1);
5136 Copy(Gppaddr, plvarsp->Gppaddr, nppaddr, Perl_ppaddr_t);
5137 Copy(Gcheck, plvarsp->Gcheck, ncheck, Perl_check_t);
5138# endif
5139# ifdef PERL_SET_VARS
5140 PERL_SET_VARS(plvarsp);
5141# endif
5142# undef PERL_GLOBAL_STRUCT_INIT
5143#endif
5144 return plvarsp;
5145}
5146
5147#endif /* PERL_GLOBAL_STRUCT */
5148
5149#ifdef PERL_GLOBAL_STRUCT
5150
5151void
5152Perl_free_global_struct(pTHX_ struct perl_vars *plvarsp)
5153{
5154#ifdef PERL_GLOBAL_STRUCT
5155# ifdef PERL_UNSET_VARS
5156 PERL_UNSET_VARS(plvarsp);
5157# endif
5158 free(plvarsp->Gppaddr);
5159 free(plvarsp->Gcheck);
5160# ifdef PERL_GLOBAL_STRUCT_PRIVATE
5161 free(plvarsp);
5162# endif
5163#endif
5164}
5165
5166#endif /* PERL_GLOBAL_STRUCT */
5167
fe4f188c
JH		 5168#ifdef PERL_MEM_LOG
5169
65ceff02
JH		 5170/*
5171 * PERL_MEM_LOG: the Perl_mem_log_..() will be compiled.
5172 *
5173 * PERL_MEM_LOG_ENV: if defined, during run time the environment
5174 * variable PERL_MEM_LOG will be consulted, and if the integer value
5175 * of that is true, the logging will happen. (The default is to
5176 * always log if the PERL_MEM_LOG define was in effect.)
5177 */
5178
5179/*
5180 * PERL_MEM_LOG_SPRINTF_BUF_SIZE: size of a (stack-allocated) buffer
5181 * the Perl_mem_log_...() will use (either via sprintf or snprintf).
5182 */
e352bcff
JH		 5183#define PERL_MEM_LOG_SPRINTF_BUF_SIZE 128
5184
65ceff02
JH		 5185/*
5186 * PERL_MEM_LOG_FD: the file descriptor the Perl_mem_log_...() will
5187 * log to. You can also define in compile time PERL_MEM_LOG_ENV_FD,
5188 * in which case the environment variable PERL_MEM_LOG_FD will be
5189 * consulted for the file descriptor number to use.
5190 */
5191#ifndef PERL_MEM_LOG_FD
5192# define PERL_MEM_LOG_FD 2 /* If STDERR is too boring for you. */
5193#endif
5194
fe4f188c 5195Malloc_t
46c6c7e2 5196Perl_mem_log_alloc(const UV n, const UV typesize, const char *typename, Malloc_t newalloc, const char *filename, const int linenumber, const char *funcname)
fe4f188c
JH		 5197{
5198#ifdef PERL_MEM_LOG_STDERR
65ceff02
JH		 5199# if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5200 char *s;
5201# endif
5202# ifdef PERL_MEM_LOG_ENV
5203 s = getenv("PERL_MEM_LOG");
5204 if (s ? atoi(s) : 0)
5205# endif
5206 {
5207 /* We can't use SVs or PerlIO for obvious reasons,
5208 * so we'll use stdio and low-level IO instead. */
5209 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5b692037 5210# ifdef PERL_MEM_LOG_TIMESTAMP
65ceff02 5211 struct timeval tv;
5b692037 5212# ifdef HAS_GETTIMEOFDAY
65ceff02 5213 gettimeofday(&tv, 0);
5b692037
JH		 5214# endif
5215 /* If there are other OS specific ways of hires time than
5216 * gettimeofday() (see ext/Time/HiRes), the easiest way is
5217 * probably that they would be used to fill in the struct
5218 * timeval. */
5219# endif
65ceff02
JH		 5220 {
5221 const STRLEN len =
d9fad198
JH		 5222 my_snprintf(buf,
5223 PERL_MEM_LOG_SPRINTF_BUF_SIZE,
5b692037
JH		 5224# ifdef PERL_MEM_LOG_TIMESTAMP
5225 "%10d.%06d: "
5226# endif
d9fad198
JH		 5227 "alloc: %s:%d:%s: %"IVdf" %"UVuf
5228 " %s = %"IVdf": %"UVxf"\n",
5b692037
JH		 5229# ifdef PERL_MEM_LOG_TIMESTAMP
5230 (int)tv.tv_sec, (int)tv.tv_usec,
5231# endif
d9fad198
JH		 5232 filename, linenumber, funcname, n, typesize,
5233 typename, n * typesize, PTR2UV(newalloc));
65ceff02
JH		 5234# ifdef PERL_MEM_LOG_ENV_FD
5235 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5236 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5237# else
5238 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5239#endif
5240 }
5241 }
fe4f188c
JH		 5242#endif
5243 return newalloc;
5244}
5245
5246Malloc_t
46c6c7e2 5247Perl_mem_log_realloc(const UV n, const UV typesize, const char *typename, Malloc_t oldalloc, Malloc_t newalloc, const char *filename, const int linenumber, const char *funcname)
fe4f188c
JH		 5248{
5249#ifdef PERL_MEM_LOG_STDERR
65ceff02
JH		 5250# if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5251 char *s;
5252# endif
5253# ifdef PERL_MEM_LOG_ENV
5254 s = PerlEnv_getenv("PERL_MEM_LOG");
5255 if (s ? atoi(s) : 0)
5256# endif
5257 {
5258 /* We can't use SVs or PerlIO for obvious reasons,
5259 * so we'll use stdio and low-level IO instead. */
5260 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5b692037 5261# ifdef PERL_MEM_LOG_TIMESTAMP
65ceff02
JH		 5262 struct timeval tv;
5263 gettimeofday(&tv, 0);
5b692037 5264# endif
65ceff02
JH		 5265 {
5266 const STRLEN len =
d9fad198
JH		 5267 my_snprintf(buf,
5268 PERL_MEM_LOG_SPRINTF_BUF_SIZE,
5b692037
JH		 5269# ifdef PERL_MEM_LOG_TIMESTAMP
5270 "%10d.%06d: "
5271# endif
d9fad198
JH		 5272 "realloc: %s:%d:%s: %"IVdf" %"UVuf
5273 " %s = %"IVdf": %"UVxf" -> %"UVxf"\n",
5b692037
JH		 5274# ifdef PERL_MEM_LOG_TIMESTAMP
5275 (int)tv.tv_sec, (int)tv.tv_usec,
5276# endif
d9fad198
JH		 5277 filename, linenumber, funcname, n, typesize,
5278 typename, n * typesize, PTR2UV(oldalloc),
5279 PTR2UV(newalloc));
65ceff02
JH		 5280# ifdef PERL_MEM_LOG_ENV_FD
5281 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5282 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5283# else
5284 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5285# endif
5286 }
5287 }
fe4f188c
JH		 5288#endif
5289 return newalloc;
5290}
5291
5292Malloc_t
46c6c7e2 5293Perl_mem_log_free(Malloc_t oldalloc, const char *filename, const int linenumber, const char *funcname)
fe4f188c
JH		 5294{
5295#ifdef PERL_MEM_LOG_STDERR
65ceff02
JH		 5296# if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5297 char *s;
5298# endif
5299# ifdef PERL_MEM_LOG_ENV
5300 s = PerlEnv_getenv("PERL_MEM_LOG");
5301 if (s ? atoi(s) : 0)
5302# endif
5303 {
5304 /* We can't use SVs or PerlIO for obvious reasons,
5305 * so we'll use stdio and low-level IO instead. */
5306 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5b692037 5307# ifdef PERL_MEM_LOG_TIMESTAMP
65ceff02
JH		 5308 struct timeval tv;
5309 gettimeofday(&tv, 0);
5b692037 5310# endif
65ceff02
JH		 5311 {
5312 const STRLEN len =
d9fad198
JH		 5313 my_snprintf(buf,
5314 PERL_MEM_LOG_SPRINTF_BUF_SIZE,
5b692037
JH		 5315# ifdef PERL_MEM_LOG_TIMESTAMP
5316 "%10d.%06d: "
5317# endif
5318 "free: %s:%d:%s: %"UVxf"\n",
5319# ifdef PERL_MEM_LOG_TIMESTAMP
d9fad198 5320 (int)tv.tv_sec, (int)tv.tv_usec,
5b692037 5321# endif
d9fad198
JH		 5322 filename, linenumber, funcname,
5323 PTR2UV(oldalloc));
65ceff02
JH		 5324# ifdef PERL_MEM_LOG_ENV_FD
5325 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5326 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5327# else
5328 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5329# endif
5330 }
5331 }
fe4f188c
JH		 5332#endif
5333 return oldalloc;
5334}
5335
5336#endif /* PERL_MEM_LOG */
5337
66610fdd 5338/*
ce582cee
NC		 5339=for apidoc my_sprintf
5340
5341The C library C<sprintf>, wrapped if necessary, to ensure that it will return
5342the length of the string written to the buffer. Only rare pre-ANSI systems
5343need the wrapper function - usually this is a direct call to C<sprintf>.
5344
5345=cut
5346*/
5347#ifndef SPRINTF_RETURNS_STRLEN
5348int
5349Perl_my_sprintf(char *buffer, const char* pat, ...)
5350{
5351 va_list args;
5352 va_start(args, pat);
5353 vsprintf(buffer, pat, args);
5354 va_end(args);
5355 return strlen(buffer);
5356}
5357#endif
5358
d9fad198
JH		 5359/*
5360=for apidoc my_snprintf
5361
5362The C library C<snprintf> functionality, if available and
5b692037 5363standards-compliant (uses C<vsnprintf>, actually). However, if the
d9fad198 5364C<vsnprintf> is not available, will unfortunately use the unsafe
5b692037
JH		 5365C<vsprintf> which can overrun the buffer (there is an overrun check,
5366but that may be too late). Consider using C<sv_vcatpvf> instead, or
5367getting C<vsnprintf>.
d9fad198
JH		 5368
5369=cut
5370*/
5371int
5372Perl_my_snprintf(char *buffer, const Size_t len, const char *format, ...)
d9fad198
JH		 5373{
5374 dTHX;
5375 int retval;
5376 va_list ap;
d9fad198 5377 va_start(ap, format);
5b692037 5378#ifdef HAS_VSNPRINTF
d9fad198
JH		 5379 retval = vsnprintf(buffer, len, format, ap);
5380#else
5381 retval = vsprintf(buffer, format, ap);
5382#endif
5383 va_end(ap);
1208b3dd
JH		 5384 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5385 if (retval < 0 || (len > 0 && retval >= len))
5b692037 5386 Perl_croak(aTHX_ "panic: my_snprintf buffer overflow");
d9fad198
JH		 5387 return retval;
5388}
5389
5390/*
5391=for apidoc my_vsnprintf
5392
5b692037
JH		 5393The C library C<vsnprintf> if available and standards-compliant.
5394However, if if the C<vsnprintf> is not available, will unfortunately
5395use the unsafe C<vsprintf> which can overrun the buffer (there is an
5396overrun check, but that may be too late). Consider using
5397C<sv_vcatpvf> instead, or getting C<vsnprintf>.
d9fad198
JH		 5398
5399=cut
5400*/
5401int
5402Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap)
d9fad198
JH		 5403{
5404 dTHX;
5405 int retval;
d9fad198
JH		 5406#ifdef NEED_VA_COPY
5407 va_list apc;
239fec62 5408 Perl_va_copy(ap, apc);
5b692037 5409# ifdef HAS_VSNPRINTF
d9fad198
JH		 5410 retval = vsnprintf(buffer, len, format, apc);
5411# else
5412 retval = vsprintf(buffer, format, apc);
5413# endif
5414#else
5b692037 5415# ifdef HAS_VSNPRINTF
d9fad198
JH		 5416 retval = vsnprintf(buffer, len, format, ap);
5417# else
5418 retval = vsprintf(buffer, format, ap);
5419# endif
5b692037 5420#endif /* #ifdef NEED_VA_COPY */
1208b3dd
JH		 5421 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5422 if (retval < 0 || (len > 0 && retval >= len))
5b692037 5423 Perl_croak(aTHX_ "panic: my_vsnprintf buffer overflow");
d9fad198
JH		 5424 return retval;
5425}
5426
b0269e46
AB		 5427void
5428Perl_my_clearenv(pTHX)
5429{
5430 dVAR;
5431#if ! defined(PERL_MICRO)
5432# if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
5433 PerlEnv_clearenv();
5434# else /* ! (PERL_IMPLICIT_SYS || WIN32) */
5435# if defined(USE_ENVIRON_ARRAY)
5436# if defined(USE_ITHREADS)
5437 /* only the parent thread can clobber the process environment */
5438 if (PL_curinterp == aTHX)
5439# endif /* USE_ITHREADS */
5440 {
5441# if ! defined(PERL_USE_SAFE_PUTENV)
5442 if ( !PL_use_safe_putenv) {
5443 I32 i;
5444 if (environ == PL_origenviron)
5445 environ = (char**)safesysmalloc(sizeof(char*));
5446 else
5447 for (i = 0; environ[i]; i++)
5448 (void)safesysfree(environ[i]);
5449 }
5450 environ[0] = NULL;
5451# else /* PERL_USE_SAFE_PUTENV */
5452# if defined(HAS_CLEARENV)
5453 (void)clearenv();
5454# elif defined(HAS_UNSETENV)
5455 int bsiz = 80; /* Most envvar names will be shorter than this. */
5456 char *buf = (char*)safesysmalloc(bsiz * sizeof(char));
5457 while (*environ != NULL) {
5458 char *e = strchr(*environ, '=');
5459 int l = e ? e - *environ : strlen(*environ);
5460 if (bsiz < l + 1) {
5461 (void)safesysfree(buf);
5462 bsiz = l + 1;
5463 buf = (char*)safesysmalloc(bsiz * sizeof(char));
5464 }
5465 strncpy(buf, *environ, l);
5466 *(buf + l) = '\0';
5467 (void)unsetenv(buf);
5468 }
5469 (void)safesysfree(buf);
5470# else /* ! HAS_CLEARENV && ! HAS_UNSETENV */
5471 /* Just null environ and accept the leakage. */
5472 *environ = NULL;
5473# endif /* HAS_CLEARENV || HAS_UNSETENV */
5474# endif /* ! PERL_USE_SAFE_PUTENV */
5475 }
5476# endif /* USE_ENVIRON_ARRAY */
5477# endif /* PERL_IMPLICIT_SYS || WIN32 */
5478#endif /* PERL_MICRO */
5479}
5480
f16dd614
DM		 5481#ifdef PERL_IMPLICIT_CONTEXT
5482
5483/* implements the MY_CXT_INIT macro. The first time a module is loaded,
5484the global PL_my_cxt_index is incremented, and that value is assigned to
5485that module's static my_cxt_index (who's address is passed as an arg).
5486Then, for each interpreter this function is called for, it makes sure a
5487void* slot is available to hang the static data off, by allocating or
5488extending the interpreter's PL_my_cxt_list array */
5489
5490void *
5491Perl_my_cxt_init(pTHX_ int *index, size_t size)
5492{
97aff369 5493 dVAR;
f16dd614
DM		 5494 void *p;
5495 if (*index == -1) {
5496 /* this module hasn't been allocated an index yet */
5497 MUTEX_LOCK(&PL_my_ctx_mutex);
5498 *index = PL_my_cxt_index++;
5499 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5500 }
5501
5502 /* make sure the array is big enough */
4c901e72
DM		 5503 if (PL_my_cxt_size <= *index) {
5504 if (PL_my_cxt_size) {
5505 while (PL_my_cxt_size <= *index)
f16dd614
DM		 5506 PL_my_cxt_size *= 2;
5507 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5508 }
5509 else {
5510 PL_my_cxt_size = 16;
5511 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5512 }
5513 }
5514 /* newSV() allocates one more than needed */
5515 p = (void*)SvPVX(newSV(size-1));
5516 PL_my_cxt_list[*index] = p;
5517 Zero(p, size, char);
5518 return p;
5519}
5520#endif
5521
ce582cee 5522/*
66610fdd
RGS		 5523 * Local variables:
5524 * c-indentation-style: bsd
5525 * c-basic-offset: 4
5526 * indent-tabs-mode: t
5527 * End:
5528 *
37442d52
RGS		 5529 * ex: set ts=8 sts=4 sw=4 noet:
5530 */
Unnamed repository; edit this file 'description' to name the repository.