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Assert that BmRARE() BmPREVIOUS() and BmUSEFUL() are only called on
[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
PP		 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
PP		 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
PP		 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
PP		 299 return ptr;
300 }
3280af22 301 else if (PL_nomemok)
bd61b366 302 return NULL;
0bd48802 303 return write_no_mem();
1050c9ca
PP		 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;
35da51f7 344
fc36a67e 345 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b 346 if (*from == '\\') {
35da51f7 347 if (from[1] != delim) {
fc36a67e
PP		 348 if (to < toend)
349 *to++ = *from;
350 tolen++;
fc36a67e 351 }
35da51f7 352 from++;
378cc40b 353 }
bedebaa5 354 else if (*from == delim)
8d063cd8 355 break;
fc36a67e
PP		 356 if (to < toend)
357 *to++ = *from;
8d063cd8 358 }
bedebaa5
CS		 359 if (to < toend)
360 *to = '\0';
fc36a67e 361 *retlen = tolen;
73d840c0 362 return (char *)from;
8d063cd8
LW		 363}
364
365/* return ptr to little string in big string, NULL if not found */
378cc40b 366/* This routine was donated by Corey Satten. */
8d063cd8
LW		 367
368char *
864dbfa3 369Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 370{
79072805 371 register I32 first;
96a5add6 372 PERL_UNUSED_CONTEXT;
378cc40b 373
a687059c 374 if (!little)
08105a92 375 return (char*)big;
a687059c 376 first = *little++;
378cc40b 377 if (!first)
08105a92 378 return (char*)big;
378cc40b 379 while (*big) {
66a1b24b 380 register const char *s, *x;
378cc40b
LW		 381 if (*big++ != first)
382 continue;
383 for (x=big,s=little; *s; /**/ ) {
384 if (!*x)
bd61b366 385 return NULL;
4fc877ac 386 if (*s != *x)
378cc40b 387 break;
4fc877ac
AL		 388 else {
389 s++;
390 x++;
378cc40b
LW		 391 }
392 }
393 if (!*s)
08105a92 394 return (char*)(big-1);
378cc40b 395 }
bd61b366 396 return NULL;
378cc40b 397}
8d063cd8 398
a687059c
LW		 399/* same as instr but allow embedded nulls */
400
401char *
4c8626be 402Perl_ninstr(pTHX_ const char *big, const char *bigend, const char *little, const char *lend)
8d063cd8 403{
96a5add6 404 PERL_UNUSED_CONTEXT;
4c8626be
GA		 405 if (little >= lend)
406 return (char*)big;
407 {
408 char first = *little++;
409 const char *s, *x;
410 bigend -= lend - little;
411 OUTER:
412 while (big <= bigend) {
413 if (*big++ != first)
414 goto OUTER;
415 for (x=big,s=little; s < lend; x++,s++) {
416 if (*s != *x)
417 goto OUTER;
418 }
419 return (char*)(big-1);
420 }
378cc40b 421 }
bd61b366 422 return NULL;
a687059c
LW		 423}
424
425/* reverse of the above--find last substring */
426
427char *
864dbfa3 428Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 429{
08105a92 430 register const char *bigbeg;
e1ec3a88 431 register const I32 first = *little;
7452cf6a 432 register const char * const littleend = lend;
96a5add6 433 PERL_UNUSED_CONTEXT;
a687059c 434
260d78c9 435 if (little >= littleend)
08105a92 436 return (char*)bigend;
a687059c
LW		 437 bigbeg = big;
438 big = bigend - (littleend - little++);
439 while (big >= bigbeg) {
66a1b24b 440 register const char *s, *x;
a687059c
LW		 441 if (*big-- != first)
442 continue;
443 for (x=big+2,s=little; s < littleend; /**/ ) {
4fc877ac 444 if (*s != *x)
a687059c 445 break;
4fc877ac
AL		 446 else {
447 x++;
448 s++;
a687059c
LW		 449 }
450 }
451 if (s >= littleend)
08105a92 452 return (char*)(big+1);
378cc40b 453 }
bd61b366 454 return NULL;
378cc40b 455}
a687059c 456
d8419e03 457#define PERL_FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
cf93c79d
IZ		 458
459/* As a space optimization, we do not compile tables for strings of length
460 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
461 special-cased in fbm_instr().
462
463 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
464
954c1994 465/*
ccfc67b7
JH		 466=head1 Miscellaneous Functions
467
954c1994
GS		 468=for apidoc fbm_compile
469
470Analyses the string in order to make fast searches on it using fbm_instr()
471-- the Boyer-Moore algorithm.
472
473=cut
474*/
475
378cc40b 476void
7506f9c3 477Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 478{
97aff369 479 dVAR;
0d46e09a 480 register const U8 *s;
79072805 481 register U32 i;
0b71040e 482 STRLEN len;
79072805
LW		 483 I32 rarest = 0;
484 U32 frequency = 256;
485
c517dc2b 486 if (flags & FBMcf_TAIL) {
890ce7af 487 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
396482e1 488 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
c517dc2b
JH		 489 if (mg && mg->mg_len >= 0)
490 mg->mg_len++;
491 }
9cbe880b 492 s = (U8*)SvPV_force_mutable(sv, len);
d1be9408 493 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 494 return;
d07077cc 495 SvUPGRADE(sv, SVt_PVBM);
78d0cf80 496 SvIOK_off(sv);
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
d8419e03
NC		 502 Sv_Grow(sv, len + 256 + PERL_FBM_TABLE_OFFSET);
503 table
504 = (unsigned char*)(SvPVX_mutable(sv) + len + PERL_FBM_TABLE_OFFSET);
505 s = table - 1 - PERL_FBM_TABLE_OFFSET; /* last char */
7506f9c3
GS		 506 memset((void*)table, mlen, 256);
507 table[-1] = (U8)flags;
02128f11 508 i = 0;
7506f9c3 509 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ		 510 while (s >= sb) {
511 if (table[*s] == mlen)
7506f9c3 512 table[*s] = (U8)i;
cf93c79d
IZ		 513 s--, i++;
514 }
378cc40b 515 }
a0714e2c 516 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
79072805 517 SvVALID_on(sv);
378cc40b 518
9cbe880b 519 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 520 for (i = 0; i < len; i++) {
22c35a8c 521 if (PL_freq[s[i]] < frequency) {
bbce6d69 522 rarest = i;
22c35a8c 523 frequency = PL_freq[s[i]];
378cc40b
LW		 524 }
525 }
79072805 526 BmRARE(sv) = s[rarest];
eb160463 527 BmPREVIOUS(sv) = (U16)rarest;
cf93c79d
IZ		 528 BmUSEFUL(sv) = 100; /* Initial value */
529 if (flags & FBMcf_TAIL)
530 SvTAIL_on(sv);
7506f9c3
GS		 531 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
532 BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW		 533}
534
cf93c79d
IZ		 535/* If SvTAIL(littlestr), it has a fake '\n' at end. */
536/* If SvTAIL is actually due to \Z or \z, this gives false positives
537 if multiline */
538
954c1994
GS		 539/*
540=for apidoc fbm_instr
541
542Returns the location of the SV in the string delimited by C<str> and
bd61b366 543C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
954c1994
GS		 544does not have to be fbm_compiled, but the search will not be as fast
545then.
546
547=cut
548*/
549
378cc40b 550char *
864dbfa3 551Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 552{
a687059c 553 register unsigned char *s;
cf93c79d 554 STRLEN l;
9cbe880b
NC		 555 register const unsigned char *little
556 = (const unsigned char *)SvPV_const(littlestr,l);
cf93c79d 557 register STRLEN littlelen = l;
e1ec3a88 558 register const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 559
eb160463 560 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 561 if ( SvTAIL(littlestr)
eb160463 562 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 563 && (littlelen == 1
12ae5dfc 564 || (*big == *little &&
27da23d5 565 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d 566 return (char*)big;
bd61b366 567 return NULL;
cf93c79d 568 }
378cc40b 569
cf93c79d 570 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ		 571
572 if (littlelen == 1) {
573 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
574 /* Know that bigend != big. */
575 if (bigend[-1] == '\n')
576 return (char *)(bigend - 1);
577 return (char *) bigend;
578 }
579 s = big;
580 while (s < bigend) {
581 if (*s == *little)
582 return (char *)s;
583 s++;
584 }
585 if (SvTAIL(littlestr))
586 return (char *) bigend;
bd61b366 587 return NULL;
cf93c79d
IZ		 588 }
589 if (!littlelen)
590 return (char*)big; /* Cannot be SvTAIL! */
591
592 /* littlelen is 2 */
593 if (SvTAIL(littlestr) && !multiline) {
594 if (bigend[-1] == '\n' && bigend[-2] == *little)
595 return (char*)bigend - 2;
596 if (bigend[-1] == *little)
597 return (char*)bigend - 1;
bd61b366 598 return NULL;
cf93c79d
IZ		 599 }
600 {
601 /* This should be better than FBM if c1 == c2, and almost
602 as good otherwise: maybe better since we do less indirection.
603 And we save a lot of memory by caching no table. */
66a1b24b
AL		 604 const unsigned char c1 = little[0];
605 const unsigned char c2 = little[1];
cf93c79d
IZ		 606
607 s = big + 1;
608 bigend--;
609 if (c1 != c2) {
610 while (s <= bigend) {
611 if (s[0] == c2) {
612 if (s[-1] == c1)
613 return (char*)s - 1;
614 s += 2;
615 continue;
3fe6f2dc 616 }
cf93c79d
IZ		 617 next_chars:
618 if (s[0] == c1) {
619 if (s == bigend)
620 goto check_1char_anchor;
621 if (s[1] == c2)
622 return (char*)s;
623 else {
624 s++;
625 goto next_chars;
626 }
627 }
628 else
629 s += 2;
630 }
631 goto check_1char_anchor;
632 }
633 /* Now c1 == c2 */
634 while (s <= bigend) {
635 if (s[0] == c1) {
636 if (s[-1] == c1)
637 return (char*)s - 1;
638 if (s == bigend)
639 goto check_1char_anchor;
640 if (s[1] == c1)
641 return (char*)s;
642 s += 3;
02128f11 643 }
c277df42 644 else
cf93c79d 645 s += 2;
c277df42 646 }
c277df42 647 }
cf93c79d
IZ		 648 check_1char_anchor: /* One char and anchor! */
649 if (SvTAIL(littlestr) && (*bigend == *little))
650 return (char *)bigend; /* bigend is already decremented. */
bd61b366 651 return NULL;
d48672a2 652 }
cf93c79d 653 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 654 s = bigend - littlelen;
a1d180c4 655 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ		 656 /* Automatically of length > 2 */
657 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 658 {
bbce6d69 659 return (char*)s; /* how sweet it is */
7506f9c3
GS		 660 }
661 if (s[1] == *little
662 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
663 {
cf93c79d 664 return (char*)s + 1; /* how sweet it is */
7506f9c3 665 }
bd61b366 666 return NULL;
02128f11 667 }
cf93c79d 668 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
c4420975 669 char * const b = ninstr((char*)big,(char*)bigend,
cf93c79d
IZ		 670 (char*)little, (char*)little + littlelen);
671
672 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
673 /* Chop \n from littlestr: */
674 s = bigend - littlelen + 1;
7506f9c3
GS		 675 if (*s == *little
676 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
677 {
3fe6f2dc 678 return (char*)s;
7506f9c3 679 }
bd61b366 680 return NULL;
a687059c 681 }
cf93c79d 682 return b;
a687059c 683 }
a1d180c4 684
3566a07d
NC		 685 /* Do actual FBM. */
686 if (littlelen > (STRLEN)(bigend - big))
687 return NULL;
688
689 {
d8419e03
NC		 690 register const unsigned char * const table
691 = little + littlelen + PERL_FBM_TABLE_OFFSET;
0d46e09a 692 register const unsigned char *oldlittle;
cf93c79d 693
cf93c79d
IZ		 694 --littlelen; /* Last char found by table lookup */
695
696 s = big + littlelen;
697 little += littlelen; /* last char */
698 oldlittle = little;
699 if (s < bigend) {
700 register I32 tmp;
701
702 top2:
7506f9c3 703 if ((tmp = table[*s])) {
cf93c79d 704 if ((s += tmp) < bigend)
62b28dd9 705 goto top2;
cf93c79d
IZ		 706 goto check_end;
707 }
708 else { /* less expensive than calling strncmp() */
66a1b24b 709 register unsigned char * const olds = s;
cf93c79d
IZ		 710
711 tmp = littlelen;
712
713 while (tmp--) {
714 if (*--s == *--little)
715 continue;
cf93c79d
IZ		 716 s = olds + 1; /* here we pay the price for failure */
717 little = oldlittle;
718 if (s < bigend) /* fake up continue to outer loop */
719 goto top2;
720 goto check_end;
721 }
722 return (char *)s;
a687059c 723 }
378cc40b 724 }
cf93c79d
IZ		 725 check_end:
726 if ( s == bigend && (table[-1] & FBMcf_TAIL)
12ae5dfc
JH		 727 && memEQ((char *)(bigend - littlelen),
728 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d 729 return (char*)bigend - littlelen;
bd61b366 730 return NULL;
378cc40b 731 }
378cc40b
LW		 732}
733
c277df42
IZ		 734/* start_shift, end_shift are positive quantities which give offsets
735 of ends of some substring of bigstr.
a0288114 736 If "last" we want the last occurrence.
c277df42 737 old_posp is the way of communication between consequent calls if
a1d180c4 738 the next call needs to find the .
c277df42 739 The initial *old_posp should be -1.
cf93c79d
IZ		 740
741 Note that we take into account SvTAIL, so one can get extra
742 optimizations if _ALL flag is set.
c277df42
IZ		 743 */
744
cf93c79d 745/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 746 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ		 747 is not supported yet. */
748
378cc40b 749char *
864dbfa3 750Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 751{
97aff369 752 dVAR;
0d46e09a 753 register const unsigned char *big;
79072805
LW		 754 register I32 pos;
755 register I32 previous;
756 register I32 first;
0d46e09a 757 register const unsigned char *little;
c277df42 758 register I32 stop_pos;
0d46e09a 759 register const unsigned char *littleend;
c277df42 760 I32 found = 0;
378cc40b 761
d372c834
NC		 762 assert(SvTYPE(littlestr) == SVt_PVBM);
763
c277df42 764 if (*old_posp == -1
3280af22 765 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 766 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
767 cant_find:
a1d180c4 768 if ( BmRARE(littlestr) == '\n'
cf93c79d 769 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
cfd0369c 770 little = (const unsigned char *)(SvPVX_const(littlestr));
cf93c79d
IZ		 771 littleend = little + SvCUR(littlestr);
772 first = *little++;
773 goto check_tail;
774 }
bd61b366 775 return NULL;
cf93c79d
IZ		 776 }
777
cfd0369c 778 little = (const unsigned char *)(SvPVX_const(littlestr));
79072805 779 littleend = little + SvCUR(littlestr);
378cc40b 780 first = *little++;
c277df42 781 /* The value of pos we can start at: */
79072805 782 previous = BmPREVIOUS(littlestr);
cfd0369c 783 big = (const unsigned char *)(SvPVX_const(bigstr));
c277df42
IZ		 784 /* The value of pos we can stop at: */
785 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 786 if (previous + start_shift > stop_pos) {
0fe87f7c
HS		 787/*
788 stop_pos does not include SvTAIL in the count, so this check is incorrect
789 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
790*/
791#if 0
cf93c79d
IZ		 792 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
793 goto check_tail;
0fe87f7c 794#endif
bd61b366 795 return NULL;
cf93c79d 796 }
c277df42 797 while (pos < previous + start_shift) {
3280af22 798 if (!(pos += PL_screamnext[pos]))
cf93c79d 799 goto cant_find;
378cc40b 800 }
de3bb511 801 big -= previous;
bbce6d69 802 do {
0d46e09a 803 register const unsigned char *s, *x;
ef64f398 804 if (pos >= stop_pos) break;
bbce6d69
PP		 805 if (big[pos] != first)
806 continue;
807 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69
PP		 808 if (*s++ != *x++) {
809 s--;
810 break;
378cc40b 811 }
bbce6d69 812 }
c277df42
IZ		 813 if (s == littleend) {
814 *old_posp = pos;
815 if (!last) return (char *)(big+pos);
816 found = 1;
817 }
3280af22 818 } while ( pos += PL_screamnext[pos] );
a1d180c4 819 if (last && found)
cf93c79d 820 return (char *)(big+(*old_posp));
cf93c79d
IZ		 821 check_tail:
822 if (!SvTAIL(littlestr) || (end_shift > 0))
bd61b366 823 return NULL;
cf93c79d 824 /* Ignore the trailing "\n". This code is not microoptimized */
cfd0369c 825 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
cf93c79d
IZ		 826 stop_pos = littleend - little; /* Actual littlestr len */
827 if (stop_pos == 0)
828 return (char*)big;
829 big -= stop_pos;
830 if (*big == first
12ae5dfc
JH		 831 && ((stop_pos == 1) ||
832 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d 833 return (char*)big;
bd61b366 834 return NULL;
8d063cd8
LW		 835}
836
79072805 837I32
864dbfa3 838Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 839{
e1ec3a88
AL		 840 register const U8 *a = (const U8 *)s1;
841 register const U8 *b = (const U8 *)s2;
96a5add6
AL		 842 PERL_UNUSED_CONTEXT;
843
79072805 844 while (len--) {
22c35a8c 845 if (*a != *b && *a != PL_fold[*b])
bbce6d69
PP		 846 return 1;
847 a++,b++;
848 }
849 return 0;
850}
851
852I32
864dbfa3 853Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 854{
27da23d5 855 dVAR;
e1ec3a88
AL		 856 register const U8 *a = (const U8 *)s1;
857 register const U8 *b = (const U8 *)s2;
96a5add6
AL		 858 PERL_UNUSED_CONTEXT;
859
bbce6d69 860 while (len--) {
22c35a8c 861 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69
PP		 862 return 1;
863 a++,b++;
79072805
LW		 864 }
865 return 0;
866}
867
8d063cd8
LW		 868/* copy a string to a safe spot */
869
954c1994 870/*
ccfc67b7
JH		 871=head1 Memory Management
872
954c1994
GS		 873=for apidoc savepv
874
61a925ed
AMS		 875Perl's version of C<strdup()>. Returns a pointer to a newly allocated
876string which is a duplicate of C<pv>. The size of the string is
877determined by C<strlen()>. The memory allocated for the new string can
878be freed with the C<Safefree()> function.
954c1994
GS		 879
880=cut
881*/
882
8d063cd8 883char *
efdfce31 884Perl_savepv(pTHX_ const char *pv)
8d063cd8 885{
96a5add6 886 PERL_UNUSED_CONTEXT;
e90e2364 887 if (!pv)
bd61b366 888 return NULL;
66a1b24b
AL		 889 else {
890 char *newaddr;
891 const STRLEN pvlen = strlen(pv)+1;
10edeb5d
JH		 892 Newx(newaddr, pvlen, char);
893 return (char*)memcpy(newaddr, pv, pvlen);
66a1b24b 894 }
8d063cd8
LW		 895}
896
a687059c
LW		 897/* same thing but with a known length */
898
954c1994
GS		 899/*
900=for apidoc savepvn
901
61a925ed
AMS		 902Perl's version of what C<strndup()> would be if it existed. Returns a
903pointer to a newly allocated string which is a duplicate of the first
cbf82dd0
NC		 904C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
905the new string can be freed with the C<Safefree()> function.
954c1994
GS		 906
907=cut
908*/
909
a687059c 910char *
efdfce31 911Perl_savepvn(pTHX_ const char *pv, register I32 len)
a687059c
LW		 912{
913 register char *newaddr;
96a5add6 914 PERL_UNUSED_CONTEXT;
a687059c 915
a02a5408 916 Newx(newaddr,len+1,char);
92110913 917 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 918 if (pv) {
e90e2364
NC		 919 /* might not be null terminated */
920 newaddr[len] = '\0';
07409e01 921 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS		 922 }
923 else {
07409e01 924 return (char *) ZeroD(newaddr,len+1,char);
92110913 925 }
a687059c
LW		 926}
927
05ec9bb3
NIS		 928/*
929=for apidoc savesharedpv
930
61a925ed
AMS		 931A version of C<savepv()> which allocates the duplicate string in memory
932which is shared between threads.
05ec9bb3
NIS		 933
934=cut
935*/
936char *
efdfce31 937Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 938{
e90e2364 939 register char *newaddr;
490a0e98 940 STRLEN pvlen;
e90e2364 941 if (!pv)
bd61b366 942 return NULL;
e90e2364 943
490a0e98
NC		 944 pvlen = strlen(pv)+1;
945 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364 946 if (!newaddr) {
0bd48802 947 return write_no_mem();
05ec9bb3 948 }
10edeb5d 949 return (char*)memcpy(newaddr, pv, pvlen);
05ec9bb3
NIS		 950}
951
2e0de35c
NC		 952/*
953=for apidoc savesvpv
954
6832267f 955A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC		 956the passed in SV using C<SvPV()>
957
958=cut
959*/
960
961char *
962Perl_savesvpv(pTHX_ SV *sv)
963{
964 STRLEN len;
7452cf6a 965 const char * const pv = SvPV_const(sv, len);
2e0de35c
NC		 966 register char *newaddr;
967
26866f99 968 ++len;
a02a5408 969 Newx(newaddr,len,char);
07409e01 970 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 971}
05ec9bb3
NIS		 972
973
cea2e8a9 974/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 975
76e3520e 976STATIC SV *
cea2e8a9 977S_mess_alloc(pTHX)
fc36a67e 978{
97aff369 979 dVAR;
fc36a67e
PP		 980 SV *sv;
981 XPVMG *any;
982
e72dc28c 983 if (!PL_dirty)
396482e1 984 return sv_2mortal(newSVpvs(""));
e72dc28c 985
0372dbb6
GS		 986 if (PL_mess_sv)
987 return PL_mess_sv;
988
fc36a67e 989 /* Create as PVMG now, to avoid any upgrading later */
a02a5408
JC		 990 Newx(sv, 1, SV);
991 Newxz(any, 1, XPVMG);
fc36a67e
PP		 992 SvFLAGS(sv) = SVt_PVMG;
993 SvANY(sv) = (void*)any;
6136c704 994 SvPV_set(sv, NULL);
fc36a67e 995 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 996 PL_mess_sv = sv;
fc36a67e
PP		 997 return sv;
998}
999
c5be433b 1000#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1001char *
1002Perl_form_nocontext(const char* pat, ...)
1003{
1004 dTHX;
c5be433b 1005 char *retval;
cea2e8a9
GS		 1006 va_list args;
1007 va_start(args, pat);
c5be433b 1008 retval = vform(pat, &args);
cea2e8a9 1009 va_end(args);
c5be433b 1010 return retval;
cea2e8a9 1011}
c5be433b 1012#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1013
7c9e965c 1014/*
ccfc67b7 1015=head1 Miscellaneous Functions
7c9e965c
JP		 1016=for apidoc form
1017
1018Takes a sprintf-style format pattern and conventional
1019(non-SV) arguments and returns the formatted string.
1020
1021 (char *) Perl_form(pTHX_ const char* pat, ...)
1022
1023can be used any place a string (char *) is required:
1024
1025 char * s = Perl_form("%d.%d",major,minor);
1026
1027Uses a single private buffer so if you want to format several strings you
1028must explicitly copy the earlier strings away (and free the copies when you
1029are done).
1030
1031=cut
1032*/
1033
8990e307 1034char *
864dbfa3 1035Perl_form(pTHX_ const char* pat, ...)
8990e307 1036{
c5be433b 1037 char *retval;
46fc3d4c 1038 va_list args;
46fc3d4c 1039 va_start(args, pat);
c5be433b 1040 retval = vform(pat, &args);
46fc3d4c 1041 va_end(args);
c5be433b
GS		 1042 return retval;
1043}
1044
1045char *
1046Perl_vform(pTHX_ const char *pat, va_list *args)
1047{
2d03de9c 1048 SV * const sv = mess_alloc();
4608196e 1049 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
e72dc28c 1050 return SvPVX(sv);
46fc3d4c 1051}
a687059c 1052
5a844595
GS		 1053#if defined(PERL_IMPLICIT_CONTEXT)
1054SV *
1055Perl_mess_nocontext(const char *pat, ...)
1056{
1057 dTHX;
1058 SV *retval;
1059 va_list args;
1060 va_start(args, pat);
1061 retval = vmess(pat, &args);
1062 va_end(args);
1063 return retval;
1064}
1065#endif /* PERL_IMPLICIT_CONTEXT */
1066
06bf62c7 1067SV *
5a844595
GS		 1068Perl_mess(pTHX_ const char *pat, ...)
1069{
1070 SV *retval;
1071 va_list args;
1072 va_start(args, pat);
1073 retval = vmess(pat, &args);
1074 va_end(args);
1075 return retval;
1076}
1077
5f66b61c
AL		 1078STATIC const COP*
1079S_closest_cop(pTHX_ const COP *cop, const OP *o)
ae7d165c 1080{
97aff369 1081 dVAR;
ae7d165c
PJ		 1082 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1083
fabdb6c0
AL		 1084 if (!o || o == PL_op)
1085 return cop;
ae7d165c
PJ		 1086
1087 if (o->op_flags & OPf_KIDS) {
5f66b61c 1088 const OP *kid;
fabdb6c0 1089 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
5f66b61c 1090 const COP *new_cop;
ae7d165c
PJ		 1091
1092 /* If the OP_NEXTSTATE has been optimised away we can still use it
1093 * the get the file and line number. */
1094
1095 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
5f66b61c 1096 cop = (const COP *)kid;
ae7d165c
PJ		 1097
1098 /* Keep searching, and return when we've found something. */
1099
1100 new_cop = closest_cop(cop, kid);
fabdb6c0
AL		 1101 if (new_cop)
1102 return new_cop;
ae7d165c
PJ		 1103 }
1104 }
1105
1106 /* Nothing found. */
1107
5f66b61c 1108 return NULL;
ae7d165c
PJ		 1109}
1110
5a844595
GS		 1111SV *
1112Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1113{
97aff369 1114 dVAR;
c4420975 1115 SV * const sv = mess_alloc();
46fc3d4c 1116
5f66b61c 1117 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
46fc3d4c 1118 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ		 1119 /*
1120 * Try and find the file and line for PL_op. This will usually be
1121 * PL_curcop, but it might be a cop that has been optimised away. We
1122 * can try to find such a cop by searching through the optree starting
1123 * from the sibling of PL_curcop.
1124 */
1125
e1ec3a88 1126 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
5f66b61c
AL		 1127 if (!cop)
1128 cop = PL_curcop;
ae7d165c
PJ		 1129
1130 if (CopLINE(cop))
ed094faf 1131 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
3aed30dc 1132 OutCopFILE(cop), (IV)CopLINE(cop));
2035c5e8 1133 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
e1ec3a88 1134 const bool line_mode = (RsSIMPLE(PL_rs) &&
95a20fc0 1135 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
57def98f 1136 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
5f66b61c 1137 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
edc2eac3
JH		 1138 line_mode ? "line" : "chunk",
1139 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1140 }
5f66b61c
AL		 1141 if (PL_dirty)
1142 sv_catpvs(sv, " during global destruction");
1143 sv_catpvs(sv, ".\n");
a687059c 1144 }
06bf62c7 1145 return sv;
a687059c
LW		 1146}
1147
7ff03255
SG		 1148void
1149Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1150{
27da23d5 1151 dVAR;
7ff03255
SG		 1152 IO *io;
1153 MAGIC *mg;
1154
1155 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1156 && (io = GvIO(PL_stderrgv))
1157 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
1158 {
1159 dSP;
1160 ENTER;
1161 SAVETMPS;
1162
1163 save_re_context();
1164 SAVESPTR(PL_stderrgv);
a0714e2c 1165 PL_stderrgv = NULL;
7ff03255
SG		 1166
1167 PUSHSTACKi(PERLSI_MAGIC);
1168
1169 PUSHMARK(SP);
1170 EXTEND(SP,2);
1171 PUSHs(SvTIED_obj((SV*)io, mg));
1172 PUSHs(sv_2mortal(newSVpvn(message, msglen)));
1173 PUTBACK;
1174 call_method("PRINT", G_SCALAR);
1175
1176 POPSTACK;
1177 FREETMPS;
1178 LEAVE;
1179 }
1180 else {
1181#ifdef USE_SFIO
1182 /* SFIO can really mess with your errno */
53c1dcc0 1183 const int e = errno;
7ff03255 1184#endif
53c1dcc0 1185 PerlIO * const serr = Perl_error_log;
7ff03255
SG		 1186
1187 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1188 (void)PerlIO_flush(serr);
1189#ifdef USE_SFIO
1190 errno = e;
1191#endif
1192 }
1193}
1194
46d9c920 1195/* Common code used by vcroak, vdie, vwarn and vwarner */
3ab1ac99 1196
46d9c920
NC		 1197STATIC bool
1198S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
63315e18 1199{
97aff369 1200 dVAR;
63315e18
NC		 1201 HV *stash;
1202 GV *gv;
1203 CV *cv;
46d9c920
NC		 1204 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1205 /* sv_2cv might call Perl_croak() or Perl_warner() */
1206 SV * const oldhook = *hook;
1207
1208 assert(oldhook);
63315e18 1209
63315e18 1210 ENTER;
46d9c920
NC		 1211 SAVESPTR(*hook);
1212 *hook = NULL;
1213 cv = sv_2cv(oldhook, &stash, &gv, 0);
63315e18
NC		 1214 LEAVE;
1215 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1216 dSP;
1217 SV *msg;
1218
1219 ENTER;
1220 save_re_context();
46d9c920
NC		 1221 if (warn) {
1222 SAVESPTR(*hook);
1223 *hook = NULL;
1224 }
1225 if (warn || message) {
63315e18
NC		 1226 msg = newSVpvn(message, msglen);
1227 SvFLAGS(msg) |= utf8;
1228 SvREADONLY_on(msg);
1229 SAVEFREESV(msg);
1230 }
1231 else {
1232 msg = ERRSV;
1233 }
1234
46d9c920 1235 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
63315e18
NC		 1236 PUSHMARK(SP);
1237 XPUSHs(msg);
1238 PUTBACK;
1239 call_sv((SV*)cv, G_DISCARD);
1240 POPSTACK;
1241 LEAVE;
46d9c920 1242 return TRUE;
63315e18 1243 }
46d9c920 1244 return FALSE;
63315e18
NC		 1245}
1246
cfd0369c 1247STATIC const char *
e07360fa
AT		 1248S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1249 I32* utf8)
1250{
1251 dVAR;
cfd0369c 1252 const char *message;
e07360fa
AT		 1253
1254 if (pat) {
890ce7af 1255 SV * const msv = vmess(pat, args);
e07360fa
AT		 1256 if (PL_errors && SvCUR(PL_errors)) {
1257 sv_catsv(PL_errors, msv);
cfd0369c 1258 message = SvPV_const(PL_errors, *msglen);
e07360fa
AT		 1259 SvCUR_set(PL_errors, 0);
1260 }
1261 else
cfd0369c 1262 message = SvPV_const(msv,*msglen);
e07360fa
AT		 1263 *utf8 = SvUTF8(msv);
1264 }
1265 else {
bd61b366 1266 message = NULL;
e07360fa
AT		 1267 }
1268
1269 DEBUG_S(PerlIO_printf(Perl_debug_log,
1270 "%p: die/croak: message = %s\ndiehook = %p\n",
1271 thr, message, PL_diehook));
1272 if (PL_diehook) {
46d9c920 1273 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
e07360fa
AT		 1274 }
1275 return message;
1276}
1277
c5be433b
GS		 1278OP *
1279Perl_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1280{
97aff369 1281 dVAR;
73d840c0 1282 const char *message;
e1ec3a88 1283 const int was_in_eval = PL_in_eval;
06bf62c7 1284 STRLEN msglen;
ff882698 1285 I32 utf8 = 0;
36477c24 1286
bf49b057 1287 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1288 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1289 thr, PL_curstack, PL_mainstack));
36477c24 1290
890ce7af 1291 message = vdie_croak_common(pat, args, &msglen, &utf8);
36477c24 1292
06bf62c7 1293 PL_restartop = die_where(message, msglen);
ff882698 1294 SvFLAGS(ERRSV) |= utf8;
bf49b057 1295 DEBUG_S(PerlIO_printf(Perl_debug_log,
7c06b590 1296 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1297 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1298 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1299 JMPENV_JUMP(3);
3280af22 1300 return PL_restartop;
36477c24
PP		 1301}
1302
c5be433b 1303#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1304OP *
1305Perl_die_nocontext(const char* pat, ...)
a687059c 1306{
cea2e8a9
GS		 1307 dTHX;
1308 OP *o;
a687059c 1309 va_list args;
cea2e8a9 1310 va_start(args, pat);
c5be433b 1311 o = vdie(pat, &args);
cea2e8a9
GS		 1312 va_end(args);
1313 return o;
1314}
c5be433b 1315#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS		 1316
1317OP *
1318Perl_die(pTHX_ const char* pat, ...)
1319{
1320 OP *o;
1321 va_list args;
1322 va_start(args, pat);
c5be433b 1323 o = vdie(pat, &args);
cea2e8a9
GS		 1324 va_end(args);
1325 return o;
1326}
1327
c5be433b
GS		 1328void
1329Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1330{
97aff369 1331 dVAR;
73d840c0 1332 const char *message;
06bf62c7 1333 STRLEN msglen;
ff882698 1334 I32 utf8 = 0;
a687059c 1335
3ab1ac99 1336 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
5a844595 1337
3280af22 1338 if (PL_in_eval) {
06bf62c7 1339 PL_restartop = die_where(message, msglen);
ff882698 1340 SvFLAGS(ERRSV) |= utf8;
6224f72b 1341 JMPENV_JUMP(3);
a0d0e21e 1342 }
84414e3e 1343 else if (!message)
cfd0369c 1344 message = SvPVx_const(ERRSV, msglen);
84414e3e 1345
7ff03255 1346 write_to_stderr(message, msglen);
f86702cc 1347 my_failure_exit();
a687059c
LW		 1348}
1349
c5be433b 1350#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1351void
cea2e8a9 1352Perl_croak_nocontext(const char *pat, ...)
a687059c 1353{
cea2e8a9 1354 dTHX;
a687059c 1355 va_list args;
cea2e8a9 1356 va_start(args, pat);
c5be433b 1357 vcroak(pat, &args);
cea2e8a9
GS		 1358 /* NOTREACHED */
1359 va_end(args);
1360}
1361#endif /* PERL_IMPLICIT_CONTEXT */
1362
954c1994 1363/*
ccfc67b7
JH		 1364=head1 Warning and Dieing
1365
954c1994
GS		 1366=for apidoc croak
1367
9983fa3c 1368This is the XSUB-writer's interface to Perl's C<die> function.
966353fd
MF		 1369Normally call this function the same way you call the C C<printf>
1370function. Calling C<croak> returns control directly to Perl,
1371sidestepping the normal C order of execution. See C<warn>.
9983fa3c
GS		 1372
1373If you want to throw an exception object, assign the object to
bd61b366 1374C<$@> and then pass C<NULL> to croak():
9983fa3c
GS		 1375
1376 errsv = get_sv("@", TRUE);
1377 sv_setsv(errsv, exception_object);
bd61b366 1378 croak(NULL);
954c1994
GS		 1379
1380=cut
1381*/
1382
cea2e8a9
GS		 1383void
1384Perl_croak(pTHX_ const char *pat, ...)
1385{
1386 va_list args;
1387 va_start(args, pat);
c5be433b 1388 vcroak(pat, &args);
cea2e8a9
GS		 1389 /* NOTREACHED */
1390 va_end(args);
1391}
1392
c5be433b
GS		 1393void
1394Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1395{
27da23d5 1396 dVAR;
06bf62c7 1397 STRLEN msglen;
53c1dcc0
AL		 1398 SV * const msv = vmess(pat, args);
1399 const I32 utf8 = SvUTF8(msv);
1400 const char * const message = SvPV_const(msv, msglen);
a687059c 1401
3280af22 1402 if (PL_warnhook) {
46d9c920 1403 if (vdie_common(message, msglen, utf8, TRUE))
20cec16a 1404 return;
748a9306 1405 }
87582a92 1406
7ff03255 1407 write_to_stderr(message, msglen);
a687059c 1408}
8d063cd8 1409
c5be433b 1410#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1411void
1412Perl_warn_nocontext(const char *pat, ...)
1413{
1414 dTHX;
1415 va_list args;
1416 va_start(args, pat);
c5be433b 1417 vwarn(pat, &args);
cea2e8a9
GS		 1418 va_end(args);
1419}
1420#endif /* PERL_IMPLICIT_CONTEXT */
1421
954c1994
GS		 1422/*
1423=for apidoc warn
1424
966353fd
MF		 1425This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1426function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS		 1427
1428=cut
1429*/
1430
cea2e8a9
GS		 1431void
1432Perl_warn(pTHX_ const char *pat, ...)
1433{
1434 va_list args;
1435 va_start(args, pat);
c5be433b 1436 vwarn(pat, &args);
cea2e8a9
GS		 1437 va_end(args);
1438}
1439
c5be433b
GS		 1440#if defined(PERL_IMPLICIT_CONTEXT)
1441void
1442Perl_warner_nocontext(U32 err, const char *pat, ...)
1443{
27da23d5 1444 dTHX;
c5be433b
GS		 1445 va_list args;
1446 va_start(args, pat);
1447 vwarner(err, pat, &args);
1448 va_end(args);
1449}
1450#endif /* PERL_IMPLICIT_CONTEXT */
1451
599cee73 1452void
864dbfa3 1453Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM		 1454{
1455 va_list args;
c5be433b
GS		 1456 va_start(args, pat);
1457 vwarner(err, pat, &args);
1458 va_end(args);
1459}
1460
1461void
1462Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1463{
27da23d5 1464 dVAR;
5f2d9966 1465 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
a3b680e6 1466 SV * const msv = vmess(pat, args);
d13b0d77 1467 STRLEN msglen;
7452cf6a 1468 const char * const message = SvPV_const(msv, msglen);
a3b680e6 1469 const I32 utf8 = SvUTF8(msv);
599cee73 1470
3aed30dc 1471 if (PL_diehook) {
63315e18 1472 assert(message);
46d9c920 1473 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
3aed30dc
HS		 1474 }
1475 if (PL_in_eval) {
1476 PL_restartop = die_where(message, msglen);
ff882698 1477 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS		 1478 JMPENV_JUMP(3);
1479 }
7ff03255 1480 write_to_stderr(message, msglen);
3aed30dc 1481 my_failure_exit();
599cee73
PM		 1482 }
1483 else {
d13b0d77 1484 Perl_vwarn(aTHX_ pat, args);
599cee73
PM		 1485 }
1486}
1487
f54ba1c2
DM		 1488/* implements the ckWARN? macros */
1489
1490bool
1491Perl_ckwarn(pTHX_ U32 w)
1492{
97aff369 1493 dVAR;
f54ba1c2
DM		 1494 return
1495 (
1496 isLEXWARN_on
1497 && PL_curcop->cop_warnings != pWARN_NONE
1498 && (
1499 PL_curcop->cop_warnings == pWARN_ALL
1500 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1501 || (unpackWARN2(w) &&
1502 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1503 || (unpackWARN3(w) &&
1504 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1505 || (unpackWARN4(w) &&
1506 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1507 )
1508 )
1509 ||
1510 (
1511 isLEXWARN_off && PL_dowarn & G_WARN_ON
1512 )
1513 ;
1514}
1515
1516/* implements the ckWARN?_d macro */
1517
1518bool
1519Perl_ckwarn_d(pTHX_ U32 w)
1520{
97aff369 1521 dVAR;
f54ba1c2
DM		 1522 return
1523 isLEXWARN_off
1524 || PL_curcop->cop_warnings == pWARN_ALL
1525 || (
1526 PL_curcop->cop_warnings != pWARN_NONE
1527 && (
1528 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1529 || (unpackWARN2(w) &&
1530 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1531 || (unpackWARN3(w) &&
1532 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1533 || (unpackWARN4(w) &&
1534 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1535 )
1536 )
1537 ;
1538}
1539
72dc9ed5
NC		 1540/* Set buffer=NULL to get a new one. */
1541STRLEN *
8ee4cf24 1542Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
72dc9ed5
NC		 1543 STRLEN size) {
1544 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
35da51f7 1545 PERL_UNUSED_CONTEXT;
72dc9ed5 1546
10edeb5d
JH		 1547 buffer = (STRLEN*)
1548 (specialWARN(buffer) ?
1549 PerlMemShared_malloc(len_wanted) :
1550 PerlMemShared_realloc(buffer, len_wanted));
72dc9ed5
NC		 1551 buffer[0] = size;
1552 Copy(bits, (buffer + 1), size, char);
1553 return buffer;
1554}
f54ba1c2 1555
e6587932
DM		 1556/* since we've already done strlen() for both nam and val
1557 * we can use that info to make things faster than
1558 * sprintf(s, "%s=%s", nam, val)
1559 */
1560#define my_setenv_format(s, nam, nlen, val, vlen) \
1561 Copy(nam, s, nlen, char); \
1562 *(s+nlen) = '='; \
1563 Copy(val, s+(nlen+1), vlen, char); \
1564 *(s+(nlen+1+vlen)) = '\0'
1565
c5d12488
JH		 1566#ifdef USE_ENVIRON_ARRAY
1567 /* VMS' my_setenv() is in vms.c */
1568#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1569void
e1ec3a88 1570Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1571{
27da23d5 1572 dVAR;
4efc5df6
GS		 1573#ifdef USE_ITHREADS
1574 /* only parent thread can modify process environment */
1575 if (PL_curinterp == aTHX)
1576#endif
1577 {
f2517201 1578#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1579 if (!PL_use_safe_putenv) {
c5d12488
JH		 1580 /* most putenv()s leak, so we manipulate environ directly */
1581 register I32 i=setenv_getix(nam); /* where does it go? */
1582 int nlen, vlen;
1583
1584 if (environ == PL_origenviron) { /* need we copy environment? */
1585 I32 j;
1586 I32 max;
1587 char **tmpenv;
1588
1589 max = i;
1590 while (environ[max])
1591 max++;
1592 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1593 for (j=0; j<max; j++) { /* copy environment */
1594 const int len = strlen(environ[j]);
1595 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1596 Copy(environ[j], tmpenv[j], len+1, char);
1597 }
1598 tmpenv[max] = NULL;
1599 environ = tmpenv; /* tell exec where it is now */
1600 }
1601 if (!val) {
1602 safesysfree(environ[i]);
1603 while (environ[i]) {
1604 environ[i] = environ[i+1];
1605 i++;
a687059c 1606 }
c5d12488
JH		 1607 return;
1608 }
1609 if (!environ[i]) { /* does not exist yet */
1610 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1611 environ[i+1] = NULL; /* make sure it's null terminated */
1612 }
1613 else
1614 safesysfree(environ[i]);
1615 nlen = strlen(nam);
1616 vlen = strlen(val);
1617
1618 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1619 /* all that work just for this */
1620 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95 1621 } else {
c5d12488 1622# endif
7ee146b1 1623# if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
88f5bc07
AB		 1624# if defined(HAS_UNSETENV)
1625 if (val == NULL) {
1626 (void)unsetenv(nam);
1627 } else {
1628 (void)setenv(nam, val, 1);
1629 }
1630# else /* ! HAS_UNSETENV */
1631 (void)setenv(nam, val, 1);
1632# endif /* HAS_UNSETENV */
47dafe4d 1633# else
88f5bc07
AB		 1634# if defined(HAS_UNSETENV)
1635 if (val == NULL) {
1636 (void)unsetenv(nam);
1637 } else {
c4420975
AL		 1638 const int nlen = strlen(nam);
1639 const int vlen = strlen(val);
1640 char * const new_env =
88f5bc07
AB		 1641 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1642 my_setenv_format(new_env, nam, nlen, val, vlen);
1643 (void)putenv(new_env);
1644 }
1645# else /* ! HAS_UNSETENV */
1646 char *new_env;
c4420975
AL		 1647 const int nlen = strlen(nam);
1648 int vlen;
88f5bc07
AB		 1649 if (!val) {
1650 val = "";
1651 }
1652 vlen = strlen(val);
1653 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1654 /* all that work just for this */
1655 my_setenv_format(new_env, nam, nlen, val, vlen);
1656 (void)putenv(new_env);
1657# endif /* HAS_UNSETENV */
47dafe4d 1658# endif /* __CYGWIN__ */
50acdf95
MS		 1659#ifndef PERL_USE_SAFE_PUTENV
1660 }
1661#endif
4efc5df6 1662 }
8d063cd8
LW		 1663}
1664
c5d12488 1665#else /* WIN32 || NETWARE */
68dc0745
PP		 1666
1667void
72229eff 1668Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1669{
27da23d5 1670 dVAR;
c5d12488
JH		 1671 register char *envstr;
1672 const int nlen = strlen(nam);
1673 int vlen;
e6587932 1674
c5d12488
JH		 1675 if (!val) {
1676 val = "";
ac5c734f 1677 }
c5d12488
JH		 1678 vlen = strlen(val);
1679 Newx(envstr, nlen+vlen+2, char);
1680 my_setenv_format(envstr, nam, nlen, val, vlen);
1681 (void)PerlEnv_putenv(envstr);
1682 Safefree(envstr);
3e3baf6d
TB		 1683}
1684
c5d12488 1685#endif /* WIN32 || NETWARE */
3e3baf6d 1686
c5d12488 1687#ifndef PERL_MICRO
3e3baf6d 1688I32
e1ec3a88 1689Perl_setenv_getix(pTHX_ const char *nam)
3e3baf6d 1690{
c5d12488 1691 register I32 i;
0d46e09a 1692 register const I32 len = strlen(nam);
96a5add6 1693 PERL_UNUSED_CONTEXT;
3e3baf6d
TB		 1694
1695 for (i = 0; environ[i]; i++) {
1696 if (
1697#ifdef WIN32
1698 strnicmp(environ[i],nam,len) == 0
1699#else
1700 strnEQ(environ[i],nam,len)
1701#endif
1702 && environ[i][len] == '=')
1703 break; /* strnEQ must come first to avoid */
1704 } /* potential SEGV's */
1705 return i;
68dc0745 1706}
c5d12488 1707#endif /* !PERL_MICRO */
68dc0745 1708
c5d12488 1709#endif /* !VMS && !EPOC*/
378cc40b 1710
16d20bd9 1711#ifdef UNLINK_ALL_VERSIONS
79072805 1712I32
6e732051 1713Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 1714{
35da51f7 1715 I32 retries = 0;
378cc40b 1716
35da51f7
AL		 1717 while (PerlLIO_unlink(f) >= 0)
1718 retries++;
1719 return retries ? 0 : -1;
378cc40b
LW		 1720}
1721#endif
1722
7a3f2258 1723/* this is a drop-in replacement for bcopy() */
2253333f 1724#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1725char *
7a3f2258 1726Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b 1727{
2d03de9c 1728 char * const retval = to;
378cc40b 1729
7c0587c8
LW		 1730 if (from - to >= 0) {
1731 while (len--)
1732 *to++ = *from++;
1733 }
1734 else {
1735 to += len;
1736 from += len;
1737 while (len--)
faf8582f 1738 *(--to) = *(--from);
7c0587c8 1739 }
378cc40b
LW		 1740 return retval;
1741}
ffed7fef 1742#endif
378cc40b 1743
7a3f2258 1744/* this is a drop-in replacement for memset() */
fc36a67e
PP		 1745#ifndef HAS_MEMSET
1746void *
7a3f2258 1747Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1748{
2d03de9c 1749 char * const retval = loc;
fc36a67e
PP		 1750
1751 while (len--)
1752 *loc++ = ch;
1753 return retval;
1754}
1755#endif
1756
7a3f2258 1757/* this is a drop-in replacement for bzero() */
7c0587c8 1758#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1759char *
7a3f2258 1760Perl_my_bzero(register char *loc, register I32 len)
378cc40b 1761{
2d03de9c 1762 char * const retval = loc;
378cc40b
LW		 1763
1764 while (len--)
1765 *loc++ = 0;
1766 return retval;
1767}
1768#endif
7c0587c8 1769
7a3f2258 1770/* this is a drop-in replacement for memcmp() */
36477c24 1771#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1772I32
7a3f2258 1773Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1774{
e1ec3a88
AL		 1775 register const U8 *a = (const U8 *)s1;
1776 register const U8 *b = (const U8 *)s2;
79072805 1777 register I32 tmp;
7c0587c8
LW		 1778
1779 while (len--) {
27da23d5 1780 if ((tmp = *a++ - *b++))
7c0587c8
LW		 1781 return tmp;
1782 }
1783 return 0;
1784}
36477c24 1785#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1786
fe14fcc3 1787#ifndef HAS_VPRINTF
a687059c 1788
85e6fe83 1789#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1790char *
1791#else
1792int
1793#endif
08105a92 1794vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 1795{
1796 FILE fakebuf;
1797
1798 fakebuf._ptr = dest;
1799 fakebuf._cnt = 32767;
35c8bce7
LW		 1800#ifndef _IOSTRG
1801#define _IOSTRG 0
1802#endif
a687059c
LW		 1803 fakebuf._flag = _IOWRT|_IOSTRG;
1804 _doprnt(pat, args, &fakebuf); /* what a kludge */
1805 (void)putc('\0', &fakebuf);
85e6fe83 1806#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1807 return(dest);
1808#else
1809 return 0; /* perl doesn't use return value */
1810#endif
1811}
1812
fe14fcc3 1813#endif /* HAS_VPRINTF */
a687059c
LW		 1814
1815#ifdef MYSWAP
ffed7fef 1816#if BYTEORDER != 0x4321
a687059c 1817short
864dbfa3 1818Perl_my_swap(pTHX_ short s)
a687059c
LW		 1819{
1820#if (BYTEORDER & 1) == 0
1821 short result;
1822
1823 result = ((s & 255) << 8) + ((s >> 8) & 255);
1824 return result;
1825#else
1826 return s;
1827#endif
1828}
1829
1830long
864dbfa3 1831Perl_my_htonl(pTHX_ long l)
a687059c
LW		 1832{
1833 union {
1834 long result;
ffed7fef 1835 char c[sizeof(long)];
a687059c
LW		 1836 } u;
1837
ffed7fef 1838#if BYTEORDER == 0x1234
a687059c
LW		 1839 u.c[0] = (l >> 24) & 255;
1840 u.c[1] = (l >> 16) & 255;
1841 u.c[2] = (l >> 8) & 255;
1842 u.c[3] = l & 255;
1843 return u.result;
1844#else
ffed7fef 1845#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1846 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1847#else
79072805
LW		 1848 register I32 o;
1849 register I32 s;
a687059c 1850
ffed7fef
LW		 1851 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1852 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 1853 }
1854 return u.result;
1855#endif
1856#endif
1857}
1858
1859long
864dbfa3 1860Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 1861{
1862 union {
1863 long l;
ffed7fef 1864 char c[sizeof(long)];
a687059c
LW		 1865 } u;
1866
ffed7fef 1867#if BYTEORDER == 0x1234
a687059c
LW		 1868 u.c[0] = (l >> 24) & 255;
1869 u.c[1] = (l >> 16) & 255;
1870 u.c[2] = (l >> 8) & 255;
1871 u.c[3] = l & 255;
1872 return u.l;
1873#else
ffed7fef 1874#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1875 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1876#else
79072805
LW		 1877 register I32 o;
1878 register I32 s;
a687059c
LW		 1879
1880 u.l = l;
1881 l = 0;
ffed7fef
LW		 1882 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1883 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 1884 }
1885 return l;
1886#endif
1887#endif
1888}
1889
ffed7fef 1890#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 1891#endif /* MYSWAP */
1892
1893/*
1894 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1895 * If these functions are defined,
1896 * the BYTEORDER is neither 0x1234 nor 0x4321.
1897 * However, this is not assumed.
1898 * -DWS
1899 */
1900
1109a392 1901#define HTOLE(name,type) \
988174c1 1902 type \
ba106d47 1903 name (register type n) \
988174c1
LW		 1904 { \
1905 union { \
1906 type value; \
1907 char c[sizeof(type)]; \
1908 } u; \
bb7a0f54
MHM		 1909 register U32 i; \
1910 register U32 s = 0; \
1109a392 1911 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW		 1912 u.c[i] = (n >> s) & 0xFF; \
1913 } \
1914 return u.value; \
1915 }
1916
1109a392 1917#define LETOH(name,type) \
988174c1 1918 type \
ba106d47 1919 name (register type n) \
988174c1
LW		 1920 { \
1921 union { \
1922 type value; \
1923 char c[sizeof(type)]; \
1924 } u; \
bb7a0f54
MHM		 1925 register U32 i; \
1926 register U32 s = 0; \
988174c1
LW		 1927 u.value = n; \
1928 n = 0; \
1109a392
MHM		 1929 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1930 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW		 1931 } \
1932 return n; \
1933 }
1934
1109a392
MHM		 1935/*
1936 * Big-endian byte order functions.
1937 */
1938
1939#define HTOBE(name,type) \
1940 type \
1941 name (register type n) \
1942 { \
1943 union { \
1944 type value; \
1945 char c[sizeof(type)]; \
1946 } u; \
bb7a0f54
MHM		 1947 register U32 i; \
1948 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM		 1949 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1950 u.c[i] = (n >> s) & 0xFF; \
1951 } \
1952 return u.value; \
1953 }
1954
1955#define BETOH(name,type) \
1956 type \
1957 name (register type n) \
1958 { \
1959 union { \
1960 type value; \
1961 char c[sizeof(type)]; \
1962 } u; \
bb7a0f54
MHM		 1963 register U32 i; \
1964 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM		 1965 u.value = n; \
1966 n = 0; \
1967 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1968 n |= ((type)(u.c[i] & 0xFF)) << s; \
1969 } \
1970 return n; \
1971 }
1972
1973/*
1974 * If we just can't do it...
1975 */
1976
1977#define NOT_AVAIL(name,type) \
1978 type \
1979 name (register type n) \
1980 { \
1981 Perl_croak_nocontext(#name "() not available"); \
1982 return n; /* not reached */ \
1983 }
1984
1985
988174c1 1986#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 1987HTOLE(htovs,short)
988174c1
LW		 1988#endif
1989#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 1990HTOLE(htovl,long)
988174c1
LW		 1991#endif
1992#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 1993LETOH(vtohs,short)
988174c1
LW		 1994#endif
1995#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM		 1996LETOH(vtohl,long)
1997#endif
1998
1999#ifdef PERL_NEED_MY_HTOLE16
2000# if U16SIZE == 2
2001HTOLE(Perl_my_htole16,U16)
2002# else
2003NOT_AVAIL(Perl_my_htole16,U16)
2004# endif
2005#endif
2006#ifdef PERL_NEED_MY_LETOH16
2007# if U16SIZE == 2
2008LETOH(Perl_my_letoh16,U16)
2009# else
2010NOT_AVAIL(Perl_my_letoh16,U16)
2011# endif
2012#endif
2013#ifdef PERL_NEED_MY_HTOBE16
2014# if U16SIZE == 2
2015HTOBE(Perl_my_htobe16,U16)
2016# else
2017NOT_AVAIL(Perl_my_htobe16,U16)
2018# endif
2019#endif
2020#ifdef PERL_NEED_MY_BETOH16
2021# if U16SIZE == 2
2022BETOH(Perl_my_betoh16,U16)
2023# else
2024NOT_AVAIL(Perl_my_betoh16,U16)
2025# endif
2026#endif
2027
2028#ifdef PERL_NEED_MY_HTOLE32
2029# if U32SIZE == 4
2030HTOLE(Perl_my_htole32,U32)
2031# else
2032NOT_AVAIL(Perl_my_htole32,U32)
2033# endif
2034#endif
2035#ifdef PERL_NEED_MY_LETOH32
2036# if U32SIZE == 4
2037LETOH(Perl_my_letoh32,U32)
2038# else
2039NOT_AVAIL(Perl_my_letoh32,U32)
2040# endif
2041#endif
2042#ifdef PERL_NEED_MY_HTOBE32
2043# if U32SIZE == 4
2044HTOBE(Perl_my_htobe32,U32)
2045# else
2046NOT_AVAIL(Perl_my_htobe32,U32)
2047# endif
2048#endif
2049#ifdef PERL_NEED_MY_BETOH32
2050# if U32SIZE == 4
2051BETOH(Perl_my_betoh32,U32)
2052# else
2053NOT_AVAIL(Perl_my_betoh32,U32)
2054# endif
2055#endif
2056
2057#ifdef PERL_NEED_MY_HTOLE64
2058# if U64SIZE == 8
2059HTOLE(Perl_my_htole64,U64)
2060# else
2061NOT_AVAIL(Perl_my_htole64,U64)
2062# endif
2063#endif
2064#ifdef PERL_NEED_MY_LETOH64
2065# if U64SIZE == 8
2066LETOH(Perl_my_letoh64,U64)
2067# else
2068NOT_AVAIL(Perl_my_letoh64,U64)
2069# endif
2070#endif
2071#ifdef PERL_NEED_MY_HTOBE64
2072# if U64SIZE == 8
2073HTOBE(Perl_my_htobe64,U64)
2074# else
2075NOT_AVAIL(Perl_my_htobe64,U64)
2076# endif
2077#endif
2078#ifdef PERL_NEED_MY_BETOH64
2079# if U64SIZE == 8
2080BETOH(Perl_my_betoh64,U64)
2081# else
2082NOT_AVAIL(Perl_my_betoh64,U64)
2083# endif
988174c1 2084#endif
a687059c 2085
1109a392
MHM		 2086#ifdef PERL_NEED_MY_HTOLES
2087HTOLE(Perl_my_htoles,short)
2088#endif
2089#ifdef PERL_NEED_MY_LETOHS
2090LETOH(Perl_my_letohs,short)
2091#endif
2092#ifdef PERL_NEED_MY_HTOBES
2093HTOBE(Perl_my_htobes,short)
2094#endif
2095#ifdef PERL_NEED_MY_BETOHS
2096BETOH(Perl_my_betohs,short)
2097#endif
2098
2099#ifdef PERL_NEED_MY_HTOLEI
2100HTOLE(Perl_my_htolei,int)
2101#endif
2102#ifdef PERL_NEED_MY_LETOHI
2103LETOH(Perl_my_letohi,int)
2104#endif
2105#ifdef PERL_NEED_MY_HTOBEI
2106HTOBE(Perl_my_htobei,int)
2107#endif
2108#ifdef PERL_NEED_MY_BETOHI
2109BETOH(Perl_my_betohi,int)
2110#endif
2111
2112#ifdef PERL_NEED_MY_HTOLEL
2113HTOLE(Perl_my_htolel,long)
2114#endif
2115#ifdef PERL_NEED_MY_LETOHL
2116LETOH(Perl_my_letohl,long)
2117#endif
2118#ifdef PERL_NEED_MY_HTOBEL
2119HTOBE(Perl_my_htobel,long)
2120#endif
2121#ifdef PERL_NEED_MY_BETOHL
2122BETOH(Perl_my_betohl,long)
2123#endif
2124
2125void
2126Perl_my_swabn(void *ptr, int n)
2127{
2128 register char *s = (char *)ptr;
2129 register char *e = s + (n-1);
2130 register char tc;
2131
2132 for (n /= 2; n > 0; s++, e--, n--) {
2133 tc = *s;
2134 *s = *e;
2135 *e = tc;
2136 }
2137}
2138
4a7d1889
NIS		 2139PerlIO *
2140Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
2141{
2986a63f 2142#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
97aff369 2143 dVAR;
1f852d0d
NIS		 2144 int p[2];
2145 register I32 This, that;
2146 register Pid_t pid;
2147 SV *sv;
2148 I32 did_pipes = 0;
2149 int pp[2];
2150
2151 PERL_FLUSHALL_FOR_CHILD;
2152 This = (*mode == 'w');
2153 that = !This;
2154 if (PL_tainting) {
2155 taint_env();
2156 taint_proper("Insecure %s%s", "EXEC");
2157 }
2158 if (PerlProc_pipe(p) < 0)
4608196e 2159 return NULL;
1f852d0d
NIS		 2160 /* Try for another pipe pair for error return */
2161 if (PerlProc_pipe(pp) >= 0)
2162 did_pipes = 1;
52e18b1f 2163 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS		 2164 if (errno != EAGAIN) {
2165 PerlLIO_close(p[This]);
4e6dfe71 2166 PerlLIO_close(p[that]);
1f852d0d
NIS		 2167 if (did_pipes) {
2168 PerlLIO_close(pp[0]);
2169 PerlLIO_close(pp[1]);
2170 }
4608196e 2171 return NULL;
1f852d0d
NIS		 2172 }
2173 sleep(5);
2174 }
2175 if (pid == 0) {
2176 /* Child */
1f852d0d
NIS		 2177#undef THIS
2178#undef THAT
2179#define THIS that
2180#define THAT This
1f852d0d
NIS		 2181 /* Close parent's end of error status pipe (if any) */
2182 if (did_pipes) {
2183 PerlLIO_close(pp[0]);
2184#if defined(HAS_FCNTL) && defined(F_SETFD)
2185 /* Close error pipe automatically if exec works */
2186 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2187#endif
2188 }
2189 /* Now dup our end of _the_ pipe to right position */
2190 if (p[THIS] != (*mode == 'r')) {
2191 PerlLIO_dup2(p[THIS], *mode == 'r');
2192 PerlLIO_close(p[THIS]);
4e6dfe71
GS		 2193 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2194 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2195 }
4e6dfe71
GS		 2196 else
2197 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS		 2198#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2199 /* No automatic close - do it by hand */
b7953727
JH		 2200# ifndef NOFILE
2201# define NOFILE 20
2202# endif
a080fe3d
NIS		 2203 {
2204 int fd;
2205
2206 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2207 if (fd != pp[1])
a080fe3d
NIS		 2208 PerlLIO_close(fd);
2209 }
1f852d0d
NIS		 2210 }
2211#endif
a0714e2c 2212 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
1f852d0d
NIS		 2213 PerlProc__exit(1);
2214#undef THIS
2215#undef THAT
2216 }
2217 /* Parent */
52e18b1f 2218 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS		 2219 if (did_pipes)
2220 PerlLIO_close(pp[1]);
2221 /* Keep the lower of the two fd numbers */
2222 if (p[that] < p[This]) {
2223 PerlLIO_dup2(p[This], p[that]);
2224 PerlLIO_close(p[This]);
2225 p[This] = p[that];
2226 }
4e6dfe71
GS		 2227 else
2228 PerlLIO_close(p[that]); /* close child's end of pipe */
2229
1f852d0d
NIS		 2230 LOCK_FDPID_MUTEX;
2231 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2232 UNLOCK_FDPID_MUTEX;
862a34c6 2233 SvUPGRADE(sv,SVt_IV);
45977657 2234 SvIV_set(sv, pid);
1f852d0d
NIS		 2235 PL_forkprocess = pid;
2236 /* If we managed to get status pipe check for exec fail */
2237 if (did_pipes && pid > 0) {
2238 int errkid;
bb7a0f54
MHM		 2239 unsigned n = 0;
2240 SSize_t n1;
1f852d0d
NIS		 2241
2242 while (n < sizeof(int)) {
2243 n1 = PerlLIO_read(pp[0],
2244 (void*)(((char*)&errkid)+n),
2245 (sizeof(int)) - n);
2246 if (n1 <= 0)
2247 break;
2248 n += n1;
2249 }
2250 PerlLIO_close(pp[0]);
2251 did_pipes = 0;
2252 if (n) { /* Error */
2253 int pid2, status;
8c51524e 2254 PerlLIO_close(p[This]);
1f852d0d
NIS		 2255 if (n != sizeof(int))
2256 Perl_croak(aTHX_ "panic: kid popen errno read");
2257 do {
2258 pid2 = wait4pid(pid, &status, 0);
2259 } while (pid2 == -1 && errno == EINTR);
2260 errno = errkid; /* Propagate errno from kid */
4608196e 2261 return NULL;
1f852d0d
NIS		 2262 }
2263 }
2264 if (did_pipes)
2265 PerlLIO_close(pp[0]);
2266 return PerlIO_fdopen(p[This], mode);
2267#else
4a7d1889
NIS		 2268 Perl_croak(aTHX_ "List form of piped open not implemented");
2269 return (PerlIO *) NULL;
1f852d0d 2270#endif
4a7d1889
NIS		 2271}
2272
5f05dabc 2273 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 2274#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 2275PerlIO *
3dd43144 2276Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c 2277{
97aff369 2278 dVAR;
a687059c 2279 int p[2];
8ac85365 2280 register I32 This, that;
d8a83dd3 2281 register Pid_t pid;
79072805 2282 SV *sv;
bfce84ec 2283 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ		 2284 I32 did_pipes = 0;
2285 int pp[2];
a687059c 2286
45bc9206 2287 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2288#ifdef OS2
2289 if (doexec) {
23da6c43 2290 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2291 }
a1d180c4 2292#endif
8ac85365
NIS		 2293 This = (*mode == 'w');
2294 that = !This;
3280af22 2295 if (doexec && PL_tainting) {
bbce6d69
PP		 2296 taint_env();
2297 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2298 }
c2267164 2299 if (PerlProc_pipe(p) < 0)
4608196e 2300 return NULL;
e446cec8
IZ		 2301 if (doexec && PerlProc_pipe(pp) >= 0)
2302 did_pipes = 1;
52e18b1f 2303 while ((pid = PerlProc_fork()) < 0) {
a687059c 2304 if (errno != EAGAIN) {
6ad3d225 2305 PerlLIO_close(p[This]);
b5ac89c3 2306 PerlLIO_close(p[that]);
e446cec8
IZ		 2307 if (did_pipes) {
2308 PerlLIO_close(pp[0]);
2309 PerlLIO_close(pp[1]);
2310 }
a687059c 2311 if (!doexec)
cea2e8a9 2312 Perl_croak(aTHX_ "Can't fork");
4608196e 2313 return NULL;
a687059c
LW		 2314 }
2315 sleep(5);
2316 }
2317 if (pid == 0) {
79072805
LW		 2318 GV* tmpgv;
2319
30ac6d9b
GS		 2320#undef THIS
2321#undef THAT
a687059c 2322#define THIS that
8ac85365 2323#define THAT This
e446cec8
IZ		 2324 if (did_pipes) {
2325 PerlLIO_close(pp[0]);
2326#if defined(HAS_FCNTL) && defined(F_SETFD)
2327 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2328#endif
2329 }
a687059c 2330 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2331 PerlLIO_dup2(p[THIS], *mode == 'r');
2332 PerlLIO_close(p[THIS]);
b5ac89c3
NIS		 2333 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2334 PerlLIO_close(p[THAT]);
a687059c 2335 }
b5ac89c3
NIS		 2336 else
2337 PerlLIO_close(p[THAT]);
4435c477 2338#ifndef OS2
a687059c 2339 if (doexec) {
a0d0e21e 2340#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2341#ifndef NOFILE
2342#define NOFILE 20
2343#endif
a080fe3d 2344 {
3aed30dc 2345 int fd;
a080fe3d
NIS		 2346
2347 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2348 if (fd != pp[1])
3aed30dc 2349 PerlLIO_close(fd);
a080fe3d 2350 }
ae986130 2351#endif
a080fe3d
NIS		 2352 /* may or may not use the shell */
2353 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2354 PerlProc__exit(1);
a687059c 2355 }
4435c477 2356#endif /* defined OS2 */
fafc274c 2357 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4d76a344 2358 SvREADONLY_off(GvSV(tmpgv));
7766f137 2359 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS		 2360 SvREADONLY_on(GvSV(tmpgv));
2361 }
2362#ifdef THREADS_HAVE_PIDS
2363 PL_ppid = (IV)getppid();
2364#endif
3280af22 2365 PL_forkprocess = 0;
ca0c25f6 2366#ifdef PERL_USES_PL_PIDSTATUS
3280af22 2367 hv_clear(PL_pidstatus); /* we have no children */
ca0c25f6 2368#endif
4608196e 2369 return NULL;
a687059c
LW		 2370#undef THIS
2371#undef THAT
2372 }
b5ac89c3 2373 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ		 2374 if (did_pipes)
2375 PerlLIO_close(pp[1]);
8ac85365 2376 if (p[that] < p[This]) {
6ad3d225
GS		 2377 PerlLIO_dup2(p[This], p[that]);
2378 PerlLIO_close(p[This]);
8ac85365 2379 p[This] = p[that];
62b28dd9 2380 }
b5ac89c3
NIS		 2381 else
2382 PerlLIO_close(p[that]);
2383
4755096e 2384 LOCK_FDPID_MUTEX;
3280af22 2385 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2386 UNLOCK_FDPID_MUTEX;
862a34c6 2387 SvUPGRADE(sv,SVt_IV);
45977657 2388 SvIV_set(sv, pid);
3280af22 2389 PL_forkprocess = pid;
e446cec8
IZ		 2390 if (did_pipes && pid > 0) {
2391 int errkid;
bb7a0f54
MHM		 2392 unsigned n = 0;
2393 SSize_t n1;
e446cec8
IZ		 2394
2395 while (n < sizeof(int)) {
2396 n1 = PerlLIO_read(pp[0],
2397 (void*)(((char*)&errkid)+n),
2398 (sizeof(int)) - n);
2399 if (n1 <= 0)
2400 break;
2401 n += n1;
2402 }
2f96c702
IZ		 2403 PerlLIO_close(pp[0]);
2404 did_pipes = 0;
e446cec8 2405 if (n) { /* Error */
faa466a7 2406 int pid2, status;
8c51524e 2407 PerlLIO_close(p[This]);
e446cec8 2408 if (n != sizeof(int))
cea2e8a9 2409 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG		 2410 do {
2411 pid2 = wait4pid(pid, &status, 0);
2412 } while (pid2 == -1 && errno == EINTR);
e446cec8 2413 errno = errkid; /* Propagate errno from kid */
4608196e 2414 return NULL;
e446cec8
IZ		 2415 }
2416 }
2417 if (did_pipes)
2418 PerlLIO_close(pp[0]);
8ac85365 2419 return PerlIO_fdopen(p[This], mode);
a687059c 2420}
7c0587c8 2421#else
85ca448a 2422#if defined(atarist) || defined(EPOC)
7c0587c8 2423FILE *popen();
760ac839 2424PerlIO *
7dc3a6bf 2425Perl_my_popen((pTHX_ const char *cmd, const char *mode)
7c0587c8 2426{
45bc9206 2427 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS		 2428 /* Call system's popen() to get a FILE *, then import it.
2429 used 0 for 2nd parameter to PerlIO_importFILE;
2430 apparently not used
2431 */
2432 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2433}
2b96b0a5
JH		 2434#else
2435#if defined(DJGPP)
2436FILE *djgpp_popen();
2437PerlIO *
7dc3a6bf 2438Perl_my_popen((pTHX_ const char *cmd, const char *mode)
2b96b0a5
JH		 2439{
2440 PERL_FLUSHALL_FOR_CHILD;
2441 /* Call system's popen() to get a FILE *, then import it.
2442 used 0 for 2nd parameter to PerlIO_importFILE;
2443 apparently not used
2444 */
2445 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2446}
2447#endif
7c0587c8
LW		 2448#endif
2449
2450#endif /* !DOSISH */
a687059c 2451
52e18b1f
GS		 2452/* this is called in parent before the fork() */
2453void
2454Perl_atfork_lock(void)
2455{
27da23d5 2456 dVAR;
3db8f154 2457#if defined(USE_ITHREADS)
52e18b1f
GS		 2458 /* locks must be held in locking order (if any) */
2459# ifdef MYMALLOC
2460 MUTEX_LOCK(&PL_malloc_mutex);
2461# endif
2462 OP_REFCNT_LOCK;
2463#endif
2464}
2465
2466/* this is called in both parent and child after the fork() */
2467void
2468Perl_atfork_unlock(void)
2469{
27da23d5 2470 dVAR;
3db8f154 2471#if defined(USE_ITHREADS)
52e18b1f
GS		 2472 /* locks must be released in same order as in atfork_lock() */
2473# ifdef MYMALLOC
2474 MUTEX_UNLOCK(&PL_malloc_mutex);
2475# endif
2476 OP_REFCNT_UNLOCK;
2477#endif
2478}
2479
2480Pid_t
2481Perl_my_fork(void)
2482{
2483#if defined(HAS_FORK)
2484 Pid_t pid;
3db8f154 2485#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS		 2486 atfork_lock();
2487 pid = fork();
2488 atfork_unlock();
2489#else
2490 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2491 * handlers elsewhere in the code */
2492 pid = fork();
2493#endif
2494 return pid;
2495#else
2496 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2497 Perl_croak_nocontext("fork() not available");
b961a566 2498 return 0;
52e18b1f
GS		 2499#endif /* HAS_FORK */
2500}
2501
748a9306 2502#ifdef DUMP_FDS
35ff7856 2503void
864dbfa3 2504Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2505{
2506 int fd;
c623ac67 2507 Stat_t tmpstatbuf;
ae986130 2508
bf49b057 2509 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2510 for (fd = 0; fd < 32; fd++) {
6ad3d225 2511 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2512 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2513 }
bf49b057 2514 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2515 return;
ae986130 2516}
35ff7856 2517#endif /* DUMP_FDS */
ae986130 2518
fe14fcc3 2519#ifndef HAS_DUP2
fec02dd3 2520int
ba106d47 2521dup2(int oldfd, int newfd)
a687059c 2522{
a0d0e21e 2523#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2524 if (oldfd == newfd)
2525 return oldfd;
6ad3d225 2526 PerlLIO_close(newfd);
fec02dd3 2527 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2528#else
fc36a67e
PP		 2529#define DUP2_MAX_FDS 256
2530 int fdtmp[DUP2_MAX_FDS];
79072805 2531 I32 fdx = 0;
ae986130
LW		 2532 int fd;
2533
fe14fcc3 2534 if (oldfd == newfd)
fec02dd3 2535 return oldfd;
6ad3d225 2536 PerlLIO_close(newfd);
fc36a67e 2537 /* good enough for low fd's... */
6ad3d225 2538 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2539 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2540 PerlLIO_close(fd);
fc36a67e
PP		 2541 fd = -1;
2542 break;
2543 }
ae986130 2544 fdtmp[fdx++] = fd;
fc36a67e 2545 }
ae986130 2546 while (fdx > 0)
6ad3d225 2547 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2548 return fd;
62b28dd9 2549#endif
a687059c
LW		 2550}
2551#endif
2552
64ca3a65 2553#ifndef PERL_MICRO
ff68c719
PP		 2554#ifdef HAS_SIGACTION
2555
abea2c45
HS		 2556#ifdef MACOS_TRADITIONAL
2557/* We don't want restart behavior on MacOS */
2558#undef SA_RESTART
2559#endif
2560
ff68c719 2561Sighandler_t
864dbfa3 2562Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2563{
27da23d5 2564 dVAR;
ff68c719
PP		 2565 struct sigaction act, oact;
2566
a10b1e10
JH		 2567#ifdef USE_ITHREADS
2568 /* only "parent" interpreter can diddle signals */
2569 if (PL_curinterp != aTHX)
8aad04aa 2570 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2571#endif
2572
8aad04aa 2573 act.sa_handler = (void(*)(int))handler;
ff68c719
PP		 2574 sigemptyset(&act.sa_mask);
2575 act.sa_flags = 0;
2576#ifdef SA_RESTART
4ffa73a3
JH		 2577 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2578 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2579#endif
358837b8 2580#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2581 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS		 2582 act.sa_flags |= SA_NOCLDWAIT;
2583#endif
ff68c719 2584 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2585 return (Sighandler_t) SIG_ERR;
ff68c719 2586 else
8aad04aa 2587 return (Sighandler_t) oact.sa_handler;
ff68c719
PP		 2588}
2589
2590Sighandler_t
864dbfa3 2591Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP		 2592{
2593 struct sigaction oact;
96a5add6 2594 PERL_UNUSED_CONTEXT;
ff68c719
PP		 2595
2596 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2597 return (Sighandler_t) SIG_ERR;
ff68c719 2598 else
8aad04aa 2599 return (Sighandler_t) oact.sa_handler;
ff68c719
PP		 2600}
2601
2602int
864dbfa3 2603Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2604{
27da23d5 2605 dVAR;
ff68c719
PP		 2606 struct sigaction act;
2607
a10b1e10
JH		 2608#ifdef USE_ITHREADS
2609 /* only "parent" interpreter can diddle signals */
2610 if (PL_curinterp != aTHX)
2611 return -1;
2612#endif
2613
8aad04aa 2614 act.sa_handler = (void(*)(int))handler;
ff68c719
PP		 2615 sigemptyset(&act.sa_mask);
2616 act.sa_flags = 0;
2617#ifdef SA_RESTART
4ffa73a3
JH		 2618 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2619 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2620#endif
36b5d377 2621#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2622 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS		 2623 act.sa_flags |= SA_NOCLDWAIT;
2624#endif
ff68c719
PP		 2625 return sigaction(signo, &act, save);
2626}
2627
2628int
864dbfa3 2629Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2630{
27da23d5 2631 dVAR;
a10b1e10
JH		 2632#ifdef USE_ITHREADS
2633 /* only "parent" interpreter can diddle signals */
2634 if (PL_curinterp != aTHX)
2635 return -1;
2636#endif
2637
ff68c719
PP		 2638 return sigaction(signo, save, (struct sigaction *)NULL);
2639}
2640
2641#else /* !HAS_SIGACTION */
2642
2643Sighandler_t
864dbfa3 2644Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2645{
39f1703b 2646#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2647 /* only "parent" interpreter can diddle signals */
2648 if (PL_curinterp != aTHX)
8aad04aa 2649 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2650#endif
2651
6ad3d225 2652 return PerlProc_signal(signo, handler);
ff68c719
PP		 2653}
2654
fabdb6c0 2655static Signal_t
4e35701f 2656sig_trap(int signo)
ff68c719 2657{
27da23d5
JH		 2658 dVAR;
2659 PL_sig_trapped++;
ff68c719
PP		 2660}
2661
2662Sighandler_t
864dbfa3 2663Perl_rsignal_state(pTHX_ int signo)
ff68c719 2664{
27da23d5 2665 dVAR;
ff68c719
PP		 2666 Sighandler_t oldsig;
2667
39f1703b 2668#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2669 /* only "parent" interpreter can diddle signals */
2670 if (PL_curinterp != aTHX)
8aad04aa 2671 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2672#endif
2673
27da23d5 2674 PL_sig_trapped = 0;
6ad3d225
GS		 2675 oldsig = PerlProc_signal(signo, sig_trap);
2676 PerlProc_signal(signo, oldsig);
27da23d5 2677 if (PL_sig_trapped)
3aed30dc 2678 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719
PP		 2679 return oldsig;
2680}
2681
2682int
864dbfa3 2683Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, 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
6ad3d225 2690 *save = PerlProc_signal(signo, handler);
8aad04aa 2691 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP		 2692}
2693
2694int
864dbfa3 2695Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2696{
39f1703b 2697#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2698 /* only "parent" interpreter can diddle signals */
2699 if (PL_curinterp != aTHX)
2700 return -1;
2701#endif
8aad04aa 2702 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP		 2703}
2704
2705#endif /* !HAS_SIGACTION */
64ca3a65 2706#endif /* !PERL_MICRO */
ff68c719 2707
5f05dabc 2708 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2709#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2710I32
864dbfa3 2711Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2712{
97aff369 2713 dVAR;
ff68c719 2714 Sigsave_t hstat, istat, qstat;
a687059c 2715 int status;
a0d0e21e 2716 SV **svp;
d8a83dd3
JH		 2717 Pid_t pid;
2718 Pid_t pid2;
03136e13 2719 bool close_failed;
b7953727 2720 int saved_errno = 0;
22fae026
TM		 2721#ifdef WIN32
2722 int saved_win32_errno;
2723#endif
a687059c 2724
4755096e 2725 LOCK_FDPID_MUTEX;
3280af22 2726 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2727 UNLOCK_FDPID_MUTEX;
25d92023 2728 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2729 SvREFCNT_dec(*svp);
3280af22 2730 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2731#ifdef OS2
2732 if (pid == -1) { /* Opened by popen. */
2733 return my_syspclose(ptr);
2734 }
a1d180c4 2735#endif
03136e13
CS		 2736 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2737 saved_errno = errno;
22fae026
TM		 2738#ifdef WIN32
2739 saved_win32_errno = GetLastError();
2740#endif
03136e13 2741 }
7c0587c8 2742#ifdef UTS
6ad3d225 2743 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2744#endif
64ca3a65 2745#ifndef PERL_MICRO
8aad04aa
JH		 2746 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2747 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2748 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
64ca3a65 2749#endif
748a9306 2750 do {
1d3434b8
GS		 2751 pid2 = wait4pid(pid, &status, 0);
2752 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2753#ifndef PERL_MICRO
ff68c719
PP		 2754 rsignal_restore(SIGHUP, &hstat);
2755 rsignal_restore(SIGINT, &istat);
2756 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2757#endif
03136e13 2758 if (close_failed) {
ce6e1103 2759 SETERRNO(saved_errno, 0);
03136e13
CS		 2760 return -1;
2761 }
1d3434b8 2762 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2763}
4633a7c4
LW		 2764#endif /* !DOSISH */
2765
2986a63f 2766#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
79072805 2767I32
d8a83dd3 2768Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2769{
97aff369 2770 dVAR;
27da23d5 2771 I32 result = 0;
b7953727
JH		 2772 if (!pid)
2773 return -1;
ca0c25f6 2774#ifdef PERL_USES_PL_PIDSTATUS
b7953727 2775 {
3aed30dc 2776 if (pid > 0) {
12072db5
NC		 2777 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2778 pid, rather than a string form. */
c4420975 2779 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
3aed30dc
HS		 2780 if (svp && *svp != &PL_sv_undef) {
2781 *statusp = SvIVX(*svp);
12072db5
NC		 2782 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2783 G_DISCARD);
3aed30dc
HS		 2784 return pid;
2785 }
2786 }
2787 else {
2788 HE *entry;
2789
2790 hv_iterinit(PL_pidstatus);
2791 if ((entry = hv_iternext(PL_pidstatus))) {
c4420975 2792 SV * const sv = hv_iterval(PL_pidstatus,entry);
7ea75b61 2793 I32 len;
0bcc34c2 2794 const char * const spid = hv_iterkey(entry,&len);
27da23d5 2795
12072db5
NC		 2796 assert (len == sizeof(Pid_t));
2797 memcpy((char *)&pid, spid, len);
3aed30dc 2798 *statusp = SvIVX(sv);
7b9a3241
NC		 2799 /* The hash iterator is currently on this entry, so simply
2800 calling hv_delete would trigger the lazy delete, which on
2801 aggregate does more work, beacuse next call to hv_iterinit()
2802 would spot the flag, and have to call the delete routine,
2803 while in the meantime any new entries can't re-use that
2804 memory. */
2805 hv_iterinit(PL_pidstatus);
7ea75b61 2806 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
3aed30dc
HS		 2807 return pid;
2808 }
20188a90
LW		 2809 }
2810 }
68a29c53 2811#endif
79072805 2812#ifdef HAS_WAITPID
367f3c24
IZ		 2813# ifdef HAS_WAITPID_RUNTIME
2814 if (!HAS_WAITPID_RUNTIME)
2815 goto hard_way;
2816# endif
cddd4526 2817 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2818 goto finish;
367f3c24
IZ		 2819#endif
2820#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
4608196e 2821 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
dfcfdb64 2822 goto finish;
367f3c24 2823#endif
ca0c25f6 2824#ifdef PERL_USES_PL_PIDSTATUS
27da23d5 2825#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2826 hard_way:
27da23d5 2827#endif
a0d0e21e 2828 {
a0d0e21e 2829 if (flags)
cea2e8a9 2830 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2831 else {
76e3520e 2832 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2833 pidgone(result,*statusp);
2834 if (result < 0)
2835 *statusp = -1;
2836 }
a687059c
LW		 2837 }
2838#endif
27da23d5 2839#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 2840 finish:
27da23d5 2841#endif
cddd4526
NIS		 2842 if (result < 0 && errno == EINTR) {
2843 PERL_ASYNC_CHECK();
2844 }
2845 return result;
a687059c 2846}
2986a63f 2847#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2848
ca0c25f6 2849#ifdef PERL_USES_PL_PIDSTATUS
7c0587c8 2850void
d8a83dd3 2851Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2852{
79072805 2853 register SV *sv;
a687059c 2854
12072db5 2855 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
862a34c6 2856 SvUPGRADE(sv,SVt_IV);
45977657 2857 SvIV_set(sv, status);
20188a90 2858 return;
a687059c 2859}
ca0c25f6 2860#endif
a687059c 2861
85ca448a 2862#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 2863int pclose();
ddcf38b7
IZ		 2864#ifdef HAS_FORK
2865int /* Cannot prototype with I32
2866 in os2ish.h. */
ba106d47 2867my_syspclose(PerlIO *ptr)
ddcf38b7 2868#else
79072805 2869I32
864dbfa3 2870Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2871#endif
a687059c 2872{
760ac839 2873 /* Needs work for PerlIO ! */
c4420975 2874 FILE * const f = PerlIO_findFILE(ptr);
7452cf6a 2875 const I32 result = pclose(f);
2b96b0a5
JH		 2876 PerlIO_releaseFILE(ptr,f);
2877 return result;
2878}
2879#endif
2880
933fea7f 2881#if defined(DJGPP)
2b96b0a5
JH		 2882int djgpp_pclose();
2883I32
2884Perl_my_pclose(pTHX_ PerlIO *ptr)
2885{
2886 /* Needs work for PerlIO ! */
c4420975 2887 FILE * const f = PerlIO_findFILE(ptr);
2b96b0a5 2888 I32 result = djgpp_pclose(f);
933fea7f 2889 result = (result << 8) & 0xff00;
760ac839
LW		 2890 PerlIO_releaseFILE(ptr,f);
2891 return result;
a687059c 2892}
7c0587c8 2893#endif
9f68db38
LW		 2894
2895void
864dbfa3 2896Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2897{
79072805 2898 register I32 todo;
c4420975 2899 register const char * const frombase = from;
96a5add6 2900 PERL_UNUSED_CONTEXT;
9f68db38
LW		 2901
2902 if (len == 1) {
08105a92 2903 register const char c = *from;
9f68db38 2904 while (count-- > 0)
5926133d 2905 *to++ = c;
9f68db38
LW		 2906 return;
2907 }
2908 while (count-- > 0) {
2909 for (todo = len; todo > 0; todo--) {
2910 *to++ = *from++;
2911 }
2912 from = frombase;
2913 }
2914}
0f85fab0 2915
fe14fcc3 2916#ifndef HAS_RENAME
79072805 2917I32
4373e329 2918Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 2919{
93a17b20
LW		 2920 char *fa = strrchr(a,'/');
2921 char *fb = strrchr(b,'/');
c623ac67
GS		 2922 Stat_t tmpstatbuf1;
2923 Stat_t tmpstatbuf2;
c4420975 2924 SV * const tmpsv = sv_newmortal();
62b28dd9
LW		 2925
2926 if (fa)
2927 fa++;
2928 else
2929 fa = a;
2930 if (fb)
2931 fb++;
2932 else
2933 fb = b;
2934 if (strNE(a,b))
2935 return FALSE;
2936 if (fa == a)
616d8c9c 2937 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2938 else
46fc3d4c 2939 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 2940 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 2941 return FALSE;
2942 if (fb == b)
616d8c9c 2943 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2944 else
46fc3d4c 2945 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 2946 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 2947 return FALSE;
2948 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2949 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2950}
fe14fcc3
LW		 2951#endif /* !HAS_RENAME */
2952
491527d0 2953char*
7f315aed
NC		 2954Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
2955 const char *const *const search_ext, I32 flags)
491527d0 2956{
97aff369 2957 dVAR;
bd61b366
SS		 2958 const char *xfound = NULL;
2959 char *xfailed = NULL;
0f31cffe 2960 char tmpbuf[MAXPATHLEN];
491527d0 2961 register char *s;
5f74f29c 2962 I32 len = 0;
491527d0
GS		 2963 int retval;
2964#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2965# define SEARCH_EXTS ".bat", ".cmd", NULL
2966# define MAX_EXT_LEN 4
2967#endif
2968#ifdef OS2
2969# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2970# define MAX_EXT_LEN 4
2971#endif
2972#ifdef VMS
2973# define SEARCH_EXTS ".pl", ".com", NULL
2974# define MAX_EXT_LEN 4
2975#endif
2976 /* additional extensions to try in each dir if scriptname not found */
2977#ifdef SEARCH_EXTS
0bcc34c2 2978 static const char *const exts[] = { SEARCH_EXTS };
7f315aed 2979 const char *const *const ext = search_ext ? search_ext : exts;
491527d0 2980 int extidx = 0, i = 0;
bd61b366 2981 const char *curext = NULL;
491527d0 2982#else
53c1dcc0 2983 PERL_UNUSED_ARG(search_ext);
491527d0
GS		 2984# define MAX_EXT_LEN 0
2985#endif
2986
2987 /*
2988 * If dosearch is true and if scriptname does not contain path
2989 * delimiters, search the PATH for scriptname.
2990 *
2991 * If SEARCH_EXTS is also defined, will look for each
2992 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2993 * while searching the PATH.
2994 *
2995 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2996 * proceeds as follows:
2997 * If DOSISH or VMSISH:
2998 * + look for ./scriptname{,.foo,.bar}
2999 * + search the PATH for scriptname{,.foo,.bar}
3000 *
3001 * If !DOSISH:
3002 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3003 * this will not look in '.' if it's not in the PATH)
3004 */
84486fc6 3005 tmpbuf[0] = '\0';
491527d0
GS		 3006
3007#ifdef VMS
3008# ifdef ALWAYS_DEFTYPES
3009 len = strlen(scriptname);
3010 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
c4420975 3011 int idx = 0, deftypes = 1;
491527d0
GS		 3012 bool seen_dot = 1;
3013
bd61b366 3014 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
491527d0
GS		 3015# else
3016 if (dosearch) {
c4420975 3017 int idx = 0, deftypes = 1;
491527d0
GS		 3018 bool seen_dot = 1;
3019
bd61b366 3020 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
491527d0
GS		 3021# endif
3022 /* The first time through, just add SEARCH_EXTS to whatever we
3023 * already have, so we can check for default file types. */
3024 while (deftypes ||
84486fc6 3025 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 3026 {
3027 if (deftypes) {
3028 deftypes = 0;
84486fc6 3029 *tmpbuf = '\0';
491527d0 3030 }
84486fc6
GS		 3031 if ((strlen(tmpbuf) + strlen(scriptname)
3032 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 3033 continue; /* don't search dir with too-long name */
6fca0082 3034 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
491527d0
GS		 3035#else /* !VMS */
3036
3037#ifdef DOSISH
3038 if (strEQ(scriptname, "-"))
3039 dosearch = 0;
3040 if (dosearch) { /* Look in '.' first. */
fe2774ed 3041 const char *cur = scriptname;
491527d0
GS		 3042#ifdef SEARCH_EXTS
3043 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3044 while (ext[i])
3045 if (strEQ(ext[i++],curext)) {
3046 extidx = -1; /* already has an ext */
3047 break;
3048 }
3049 do {
3050#endif
3051 DEBUG_p(PerlIO_printf(Perl_debug_log,
3052 "Looking for %s\n",cur));
017f25f1
IZ		 3053 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3054 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 3055 dosearch = 0;
3056 scriptname = cur;
3057#ifdef SEARCH_EXTS
3058 break;
3059#endif
3060 }
3061#ifdef SEARCH_EXTS
3062 if (cur == scriptname) {
3063 len = strlen(scriptname);
84486fc6 3064 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 3065 break;
9e4425f7
SH		 3066 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3067 cur = tmpbuf;
491527d0
GS		 3068 }
3069 } while (extidx >= 0 && ext[extidx] /* try an extension? */
6fca0082 3070 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
491527d0
GS		 3071#endif
3072 }
3073#endif
3074
cd39f2b6
JH		 3075#ifdef MACOS_TRADITIONAL
3076 if (dosearch && !strchr(scriptname, ':') &&
3077 (s = PerlEnv_getenv("Commands")))
3078#else
491527d0
GS		 3079 if (dosearch && !strchr(scriptname, '/')
3080#ifdef DOSISH
3081 && !strchr(scriptname, '\\')
3082#endif
cd39f2b6
JH		 3083 && (s = PerlEnv_getenv("PATH")))
3084#endif
3085 {
491527d0 3086 bool seen_dot = 0;
92f0c265 3087
3280af22
NIS		 3088 PL_bufend = s + strlen(s);
3089 while (s < PL_bufend) {
cd39f2b6
JH		 3090#ifdef MACOS_TRADITIONAL
3091 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
3092 ',',
3093 &len);
3094#else
491527d0
GS		 3095#if defined(atarist) || defined(DOSISH)
3096 for (len = 0; *s
3097# ifdef atarist
3098 && *s != ','
3099# endif
3100 && *s != ';'; len++, s++) {
84486fc6
GS		 3101 if (len < sizeof tmpbuf)
3102 tmpbuf[len] = *s;
491527d0 3103 }
84486fc6
GS		 3104 if (len < sizeof tmpbuf)
3105 tmpbuf[len] = '\0';
491527d0 3106#else /* ! (atarist || DOSISH) */
3280af22 3107 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 3108 ':',
3109 &len);
3110#endif /* ! (atarist || DOSISH) */
cd39f2b6 3111#endif /* MACOS_TRADITIONAL */
3280af22 3112 if (s < PL_bufend)
491527d0 3113 s++;
84486fc6 3114 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 3115 continue; /* don't search dir with too-long name */
cd39f2b6
JH		 3116#ifdef MACOS_TRADITIONAL
3117 if (len && tmpbuf[len - 1] != ':')
3118 tmpbuf[len++] = ':';
3119#else
491527d0 3120 if (len
490a0e98 3121# if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 3122 && tmpbuf[len - 1] != '/'
3123 && tmpbuf[len - 1] != '\\'
490a0e98 3124# endif
491527d0 3125 )
84486fc6
GS		 3126 tmpbuf[len++] = '/';
3127 if (len == 2 && tmpbuf[0] == '.')
491527d0 3128 seen_dot = 1;
cd39f2b6 3129#endif
28f0d0ec 3130 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
491527d0
GS		 3131#endif /* !VMS */
3132
3133#ifdef SEARCH_EXTS
84486fc6 3134 len = strlen(tmpbuf);
491527d0
GS		 3135 if (extidx > 0) /* reset after previous loop */
3136 extidx = 0;
3137 do {
3138#endif
84486fc6 3139 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 3140 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 3141 if (S_ISDIR(PL_statbuf.st_mode)) {
3142 retval = -1;
3143 }
491527d0
GS		 3144#ifdef SEARCH_EXTS
3145 } while ( retval < 0 /* not there */
3146 && extidx>=0 && ext[extidx] /* try an extension? */
6fca0082 3147 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
491527d0
GS		 3148 );
3149#endif
3150 if (retval < 0)
3151 continue;
3280af22
NIS		 3152 if (S_ISREG(PL_statbuf.st_mode)
3153 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 3154#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 3155 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 3156#endif
3157 )
3158 {
3aed30dc 3159 xfound = tmpbuf; /* bingo! */
491527d0
GS		 3160 break;
3161 }
3162 if (!xfailed)
84486fc6 3163 xfailed = savepv(tmpbuf);
491527d0
GS		 3164 }
3165#ifndef DOSISH
017f25f1 3166 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3167 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3168 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 3169#endif
3170 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 3171 if (!xfound) {
3172 if (flags & 1) { /* do or die? */
3aed30dc 3173 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 3174 (xfailed ? "execute" : "find"),
3175 (xfailed ? xfailed : scriptname),
3176 (xfailed ? "" : " on PATH"),
3177 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3178 }
bd61b366 3179 scriptname = NULL;
9ccb31f9 3180 }
43c5f42d 3181 Safefree(xfailed);
491527d0
GS		 3182 scriptname = xfound;
3183 }
bd61b366 3184 return (scriptname ? savepv(scriptname) : NULL);
491527d0
GS		 3185}
3186
ba869deb
GS		 3187#ifndef PERL_GET_CONTEXT_DEFINED
3188
3189void *
3190Perl_get_context(void)
3191{
27da23d5 3192 dVAR;
3db8f154 3193#if defined(USE_ITHREADS)
ba869deb
GS		 3194# ifdef OLD_PTHREADS_API
3195 pthread_addr_t t;
3196 if (pthread_getspecific(PL_thr_key, &t))
3197 Perl_croak_nocontext("panic: pthread_getspecific");
3198 return (void*)t;
3199# else
bce813aa 3200# ifdef I_MACH_CTHREADS
8b8b35ab 3201 return (void*)cthread_data(cthread_self());
bce813aa 3202# else
8b8b35ab
JH		 3203 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3204# endif
c44d3fdb 3205# endif
ba869deb
GS		 3206#else
3207 return (void*)NULL;
3208#endif
3209}
3210
3211void
3212Perl_set_context(void *t)
3213{
8772537c 3214 dVAR;
3db8f154 3215#if defined(USE_ITHREADS)
c44d3fdb
GS		 3216# ifdef I_MACH_CTHREADS
3217 cthread_set_data(cthread_self(), t);
3218# else
ba869deb
GS		 3219 if (pthread_setspecific(PL_thr_key, t))
3220 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3221# endif
b464bac0 3222#else
8772537c 3223 PERL_UNUSED_ARG(t);
ba869deb
GS		 3224#endif
3225}
3226
3227#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3228
27da23d5 3229#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3230struct perl_vars *
864dbfa3 3231Perl_GetVars(pTHX)
22239a37 3232{
533c011a 3233 return &PL_Vars;
22239a37 3234}
31fb1209
NIS		 3235#endif
3236
1cb0ed9b 3237char **
864dbfa3 3238Perl_get_op_names(pTHX)
31fb1209 3239{
96a5add6
AL		 3240 PERL_UNUSED_CONTEXT;
3241 return (char **)PL_op_name;
31fb1209
NIS		 3242}
3243
1cb0ed9b 3244char **
864dbfa3 3245Perl_get_op_descs(pTHX)
31fb1209 3246{
96a5add6
AL		 3247 PERL_UNUSED_CONTEXT;
3248 return (char **)PL_op_desc;
31fb1209 3249}
9e6b2b00 3250
e1ec3a88 3251const char *
864dbfa3 3252Perl_get_no_modify(pTHX)
9e6b2b00 3253{
96a5add6
AL		 3254 PERL_UNUSED_CONTEXT;
3255 return PL_no_modify;
9e6b2b00
GS		 3256}
3257
3258U32 *
864dbfa3 3259Perl_get_opargs(pTHX)
9e6b2b00 3260{
96a5add6
AL		 3261 PERL_UNUSED_CONTEXT;
3262 return (U32 *)PL_opargs;
9e6b2b00 3263}
51aa15f3 3264
0cb96387
GS		 3265PPADDR_t*
3266Perl_get_ppaddr(pTHX)
3267{
96a5add6
AL		 3268 dVAR;
3269 PERL_UNUSED_CONTEXT;
3270 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS		 3271}
3272
a6c40364
GS		 3273#ifndef HAS_GETENV_LEN
3274char *
bf4acbe4 3275Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3276{
8772537c 3277 char * const env_trans = PerlEnv_getenv(env_elem);
96a5add6 3278 PERL_UNUSED_CONTEXT;
a6c40364
GS		 3279 if (env_trans)
3280 *len = strlen(env_trans);
3281 return env_trans;
f675dbe5
CB		 3282}
3283#endif
3284
dc9e4912
GS		 3285
3286MGVTBL*
864dbfa3 3287Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3288{
7452cf6a 3289 const MGVTBL* result;
96a5add6 3290 PERL_UNUSED_CONTEXT;
dc9e4912
GS		 3291
3292 switch(vtbl_id) {
3293 case want_vtbl_sv:
3294 result = &PL_vtbl_sv;
3295 break;
3296 case want_vtbl_env:
3297 result = &PL_vtbl_env;
3298 break;
3299 case want_vtbl_envelem:
3300 result = &PL_vtbl_envelem;
3301 break;
3302 case want_vtbl_sig:
3303 result = &PL_vtbl_sig;
3304 break;
3305 case want_vtbl_sigelem:
3306 result = &PL_vtbl_sigelem;
3307 break;
3308 case want_vtbl_pack:
3309 result = &PL_vtbl_pack;
3310 break;
3311 case want_vtbl_packelem:
3312 result = &PL_vtbl_packelem;
3313 break;
3314 case want_vtbl_dbline:
3315 result = &PL_vtbl_dbline;
3316 break;
3317 case want_vtbl_isa:
3318 result = &PL_vtbl_isa;
3319 break;
3320 case want_vtbl_isaelem:
3321 result = &PL_vtbl_isaelem;
3322 break;
3323 case want_vtbl_arylen:
3324 result = &PL_vtbl_arylen;
3325 break;
dc9e4912
GS		 3326 case want_vtbl_mglob:
3327 result = &PL_vtbl_mglob;
3328 break;
3329 case want_vtbl_nkeys:
3330 result = &PL_vtbl_nkeys;
3331 break;
3332 case want_vtbl_taint:
3333 result = &PL_vtbl_taint;
3334 break;
3335 case want_vtbl_substr:
3336 result = &PL_vtbl_substr;
3337 break;
3338 case want_vtbl_vec:
3339 result = &PL_vtbl_vec;
3340 break;
3341 case want_vtbl_pos:
3342 result = &PL_vtbl_pos;
3343 break;
3344 case want_vtbl_bm:
3345 result = &PL_vtbl_bm;
3346 break;
3347 case want_vtbl_fm:
3348 result = &PL_vtbl_fm;
3349 break;
3350 case want_vtbl_uvar:
3351 result = &PL_vtbl_uvar;
3352 break;
dc9e4912
GS		 3353 case want_vtbl_defelem:
3354 result = &PL_vtbl_defelem;
3355 break;
3356 case want_vtbl_regexp:
3357 result = &PL_vtbl_regexp;
3358 break;
3359 case want_vtbl_regdata:
3360 result = &PL_vtbl_regdata;
3361 break;
3362 case want_vtbl_regdatum:
3363 result = &PL_vtbl_regdatum;
3364 break;
3c90161d 3365#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3366 case want_vtbl_collxfrm:
3367 result = &PL_vtbl_collxfrm;
3368 break;
3c90161d 3369#endif
dc9e4912
GS		 3370 case want_vtbl_amagic:
3371 result = &PL_vtbl_amagic;
3372 break;
3373 case want_vtbl_amagicelem:
3374 result = &PL_vtbl_amagicelem;
3375 break;
810b8aa5
GS		 3376 case want_vtbl_backref:
3377 result = &PL_vtbl_backref;
3378 break;
7e8c5dac
HS		 3379 case want_vtbl_utf8:
3380 result = &PL_vtbl_utf8;
3381 break;
7452cf6a 3382 default:
4608196e 3383 result = NULL;
7452cf6a 3384 break;
dc9e4912 3385 }
27da23d5 3386 return (MGVTBL*)result;
dc9e4912
GS		 3387}
3388
767df6a1 3389I32
864dbfa3 3390Perl_my_fflush_all(pTHX)
767df6a1 3391{
f800e14d 3392#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3393 return PerlIO_flush(NULL);
767df6a1 3394#else
8fbdfb7c 3395# if defined(HAS__FWALK)
f13a2bc0 3396 extern int fflush(FILE *);
74cac757
JH		 3397 /* undocumented, unprototyped, but very useful BSDism */
3398 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3399 _fwalk(&fflush);
74cac757 3400 return 0;
8fa7f367 3401# else
8fbdfb7c 3402# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3403 long open_max = -1;
8fbdfb7c 3404# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3405 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3406# else
8fa7f367 3407# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3408 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH		 3409# else
3410# ifdef FOPEN_MAX
74cac757 3411 open_max = FOPEN_MAX;
8fa7f367
JH		 3412# else
3413# ifdef OPEN_MAX
74cac757 3414 open_max = OPEN_MAX;
8fa7f367
JH		 3415# else
3416# ifdef _NFILE
d2201af2 3417 open_max = _NFILE;
8fa7f367
JH		 3418# endif
3419# endif
74cac757 3420# endif
767df6a1
JH		 3421# endif
3422# endif
767df6a1
JH		 3423 if (open_max > 0) {
3424 long i;
3425 for (i = 0; i < open_max; i++)
d2201af2
AD		 3426 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3427 STDIO_STREAM_ARRAY[i]._file < open_max &&
3428 STDIO_STREAM_ARRAY[i]._flag)
3429 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3430 return 0;
3431 }
8fbdfb7c 3432# endif
93189314 3433 SETERRNO(EBADF,RMS_IFI);
767df6a1 3434 return EOF;
74cac757 3435# endif
767df6a1
JH		 3436#endif
3437}
097ee67d 3438
69282e91 3439void
e1ec3a88 3440Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
bc37a18f 3441{
b64e5050 3442 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
66fc2fa5 3443
4c80c0b2 3444 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3aed30dc 3445 if (ckWARN(WARN_IO)) {
10edeb5d
JH		 3446 const char * const direction =
3447 (const char *)((op == OP_phoney_INPUT_ONLY) ? "in" : "out");
3aed30dc
HS		 3448 if (name && *name)
3449 Perl_warner(aTHX_ packWARN(WARN_IO),
3450 "Filehandle %s opened only for %sput",
fd322ea4 3451 name, direction);
3aed30dc
HS		 3452 else
3453 Perl_warner(aTHX_ packWARN(WARN_IO),
fd322ea4 3454 "Filehandle opened only for %sput", direction);
3aed30dc 3455 }
2dd78f96
JH		 3456 }
3457 else {
e1ec3a88 3458 const char *vile;
3aed30dc
HS		 3459 I32 warn_type;
3460
3461 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3462 vile = "closed";
3463 warn_type = WARN_CLOSED;
3464 }
3465 else {
3466 vile = "unopened";
3467 warn_type = WARN_UNOPENED;
3468 }
3469
3470 if (ckWARN(warn_type)) {
10edeb5d
JH		 3471 const char * const pars =
3472 (const char *)(OP_IS_FILETEST(op) ? "" : "()");
f0a09b71 3473 const char * const func =
10edeb5d
JH		 3474 (const char *)
3475 (op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3476 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3477 op < 0 ? "" : /* handle phoney cases */
3478 PL_op_desc[op]);
3479 const char * const type =
3480 (const char *)
3481 (OP_IS_SOCKET(op) ||
3482 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
3483 "socket" : "filehandle");
3aed30dc
HS		 3484 if (name && *name) {
3485 Perl_warner(aTHX_ packWARN(warn_type),
3486 "%s%s on %s %s %s", func, pars, vile, type, name);
3487 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3488 Perl_warner(
3489 aTHX_ packWARN(warn_type),
3490 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3491 func, pars, name
3492 );
3493 }
3494 else {
3495 Perl_warner(aTHX_ packWARN(warn_type),
3496 "%s%s on %s %s", func, pars, vile, type);
3497 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3498 Perl_warner(
3499 aTHX_ packWARN(warn_type),
3500 "\t(Are you trying to call %s%s on dirhandle?)\n",
3501 func, pars
3502 );
3503 }
3504 }
bc37a18f 3505 }
69282e91 3506}
a926ef6b
JH		 3507
3508#ifdef EBCDIC
cbebf344
JH		 3509/* in ASCII order, not that it matters */
3510static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3511
a926ef6b
JH		 3512int
3513Perl_ebcdic_control(pTHX_ int ch)
3514{
3aed30dc 3515 if (ch > 'a') {
e1ec3a88 3516 const char *ctlp;
3aed30dc
HS		 3517
3518 if (islower(ch))
3519 ch = toupper(ch);
3520
3521 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3522 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
a926ef6b 3523 }
3aed30dc
HS		 3524
3525 if (ctlp == controllablechars)
3526 return('\177'); /* DEL */
3527 else
3528 return((unsigned char)(ctlp - controllablechars - 1));
3529 } else { /* Want uncontrol */
3530 if (ch == '\177' || ch == -1)
3531 return('?');
3532 else if (ch == '\157')
3533 return('\177');
3534 else if (ch == '\174')
3535 return('\000');
3536 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3537 return('\036');
3538 else if (ch == '\155')
3539 return('\037');
3540 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3541 return(controllablechars[ch+1]);
3542 else
3543 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3544 }
a926ef6b
JH		 3545}
3546#endif
e72cf795 3547
f6adc668 3548/* To workaround core dumps from the uninitialised tm_zone we get the
e72cf795
JH		 3549 * system to give us a reasonable struct to copy. This fix means that
3550 * strftime uses the tm_zone and tm_gmtoff values returned by
3551 * localtime(time()). That should give the desired result most of the
3552 * time. But probably not always!
3553 *
f6adc668
JH		 3554 * This does not address tzname aspects of NETaa14816.
3555 *
e72cf795 3556 */
f6adc668 3557
e72cf795
JH		 3558#ifdef HAS_GNULIBC
3559# ifndef STRUCT_TM_HASZONE
3560# define STRUCT_TM_HASZONE
3561# endif
3562#endif
3563
f6adc668
JH		 3564#ifdef STRUCT_TM_HASZONE /* Backward compat */
3565# ifndef HAS_TM_TM_ZONE
3566# define HAS_TM_TM_ZONE
3567# endif
3568#endif
3569
e72cf795 3570void
f1208910 3571Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795 3572{
f6adc668 3573#ifdef HAS_TM_TM_ZONE
e72cf795 3574 Time_t now;
1b6737cc 3575 const struct tm* my_tm;
e72cf795 3576 (void)time(&now);
82c57498 3577 my_tm = localtime(&now);
ca46b8ee
SP		 3578 if (my_tm)
3579 Copy(my_tm, ptm, 1, struct tm);
1b6737cc
AL		 3580#else
3581 PERL_UNUSED_ARG(ptm);
e72cf795
JH		 3582#endif
3583}
3584
3585/*
3586 * mini_mktime - normalise struct tm values without the localtime()
3587 * semantics (and overhead) of mktime().
3588 */
3589void
f1208910 3590Perl_mini_mktime(pTHX_ struct tm *ptm)
e72cf795
JH		 3591{
3592 int yearday;
3593 int secs;
3594 int month, mday, year, jday;
3595 int odd_cent, odd_year;
96a5add6 3596 PERL_UNUSED_CONTEXT;
e72cf795
JH		 3597
3598#define DAYS_PER_YEAR 365
3599#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3600#define DAYS_PER_