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More SvPV consting, including some code cleanup and living dangerously
[perl5.git] / util.c
CommitLineData
a0d0e21e 1/* util.c
a687059c 2 *
4bb101f2 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
770526c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
a687059c 5 *
d48672a2
LW		 6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8d063cd8 8 *
8d063cd8 9 */
a0d0e21e
LW		 10
11/*
12 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
13 * not content." --Gandalf
14 */
8d063cd8 15
166f8a29
DM		 16/* This file contains assorted utility routines.
17 * Which is a polite way of saying any stuff that people couldn't think of
18 * a better place for. Amongst other things, it includes the warning and
19 * dieing stuff, plus wrappers for malloc code.
20 */
21
8d063cd8 22#include "EXTERN.h"
864dbfa3 23#define PERL_IN_UTIL_C
8d063cd8 24#include "perl.h"
62b28dd9 25
64ca3a65 26#ifndef PERL_MICRO
a687059c 27#include <signal.h>
36477c24 28#ifndef SIG_ERR
29# define SIG_ERR ((Sighandler_t) -1)
30#endif
64ca3a65 31#endif
36477c24 32
172d2248
OS		 33#ifdef __Lynx__
34/* Missing protos on LynxOS */
35int putenv(char *);
36#endif
37
ff68c719 38#ifdef I_SYS_WAIT
39# include <sys/wait.h>
40#endif
41
868439a2
JH		 42#ifdef HAS_SELECT
43# ifdef I_SYS_SELECT
44# include <sys/select.h>
45# endif
46#endif
47
8d063cd8 48#define FLUSH
8d063cd8 49
16cebae2
GS		 50#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
51# define FD_CLOEXEC 1 /* NeXT needs this */
52#endif
53
a687059c
LW		 54/* NOTE: Do not call the next three routines directly. Use the macros
55 * in handy.h, so that we can easily redefine everything to do tracking of
56 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 57 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW		 58 */
59
26fa51c3
AMS		 60/* paranoid version of system's malloc() */
61
bd4080b3 62Malloc_t
4f63d024 63Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 64{
54aff467 65 dTHX;
bd4080b3 66 Malloc_t ptr;
55497cff 67#ifdef HAS_64K_LIMIT
62b28dd9 68 if (size > 0xffff) {
bf49b057 69 PerlIO_printf(Perl_error_log,
16cebae2 70 "Allocation too large: %lx\n", size) FLUSH;
54aff467 71 my_exit(1);
62b28dd9 72 }
55497cff 73#endif /* HAS_64K_LIMIT */
34de22dd
LW		 74#ifdef DEBUGGING
75 if ((long)size < 0)
4f63d024 76 Perl_croak_nocontext("panic: malloc");
34de22dd 77#endif
12ae5dfc 78 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 79 PERL_ALLOC_CHECK(ptr);
97835f67 80 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
8d063cd8
LW		 81 if (ptr != Nullch)
82 return ptr;
3280af22 83 else if (PL_nomemok)
7c0587c8 84 return Nullch;
8d063cd8 85 else {
e0767201
GA		 86 /* Can't use PerlIO to write as it allocates memory */
87 PerlLIO_write(PerlIO_fileno(Perl_error_log),
88 PL_no_mem, strlen(PL_no_mem));
54aff467 89 my_exit(1);
3aed30dc 90 return Nullch;
8d063cd8
LW		 91 }
92 /*NOTREACHED*/
93}
94
f2517201 95/* paranoid version of system's realloc() */
8d063cd8 96
bd4080b3 97Malloc_t
4f63d024 98Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 99{
54aff467 100 dTHX;
bd4080b3 101 Malloc_t ptr;
9a34ef1d 102#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 103 Malloc_t PerlMem_realloc();
ecfc5424 104#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 105
a1d180c4 106#ifdef HAS_64K_LIMIT
5f05dabc 107 if (size > 0xffff) {
bf49b057 108 PerlIO_printf(Perl_error_log,
5f05dabc 109 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 110 my_exit(1);
5f05dabc 111 }
55497cff 112#endif /* HAS_64K_LIMIT */
7614df0c 113 if (!size) {
f2517201 114 safesysfree(where);
7614df0c
JD		 115 return NULL;
116 }
117
378cc40b 118 if (!where)
f2517201 119 return safesysmalloc(size);
34de22dd
LW		 120#ifdef DEBUGGING
121 if ((long)size < 0)
4f63d024 122 Perl_croak_nocontext("panic: realloc");
34de22dd 123#endif
12ae5dfc 124 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 125 PERL_ALLOC_CHECK(ptr);
a1d180c4 126
97835f67
JH		 127 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
128 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
79072805 129
8d063cd8
LW		 130 if (ptr != Nullch)
131 return ptr;
3280af22 132 else if (PL_nomemok)
7c0587c8 133 return Nullch;
8d063cd8 134 else {
e0767201
GA		 135 /* Can't use PerlIO to write as it allocates memory */
136 PerlLIO_write(PerlIO_fileno(Perl_error_log),
137 PL_no_mem, strlen(PL_no_mem));
54aff467 138 my_exit(1);
4e35701f 139 return Nullch;
8d063cd8
LW		 140 }
141 /*NOTREACHED*/
142}
143
f2517201 144/* safe version of system's free() */
8d063cd8 145
54310121 146Free_t
4f63d024 147Perl_safesysfree(Malloc_t where)
8d063cd8 148{
27da23d5 149 dVAR;
155aba94 150#ifdef PERL_IMPLICIT_SYS
54aff467 151 dTHX;
155aba94 152#endif
97835f67 153 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 154 if (where) {
de3bb511 155 /*SUPPRESS 701*/
6ad3d225 156 PerlMem_free(where);
378cc40b 157 }
8d063cd8
LW		 158}
159
f2517201 160/* safe version of system's calloc() */
1050c9ca 161
bd4080b3 162Malloc_t
4f63d024 163Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 164{
54aff467 165 dTHX;
bd4080b3 166 Malloc_t ptr;
1050c9ca 167
55497cff 168#ifdef HAS_64K_LIMIT
5f05dabc 169 if (size * count > 0xffff) {
bf49b057 170 PerlIO_printf(Perl_error_log,
5f05dabc 171 "Allocation too large: %lx\n", size * count) FLUSH;
54aff467 172 my_exit(1);
5f05dabc 173 }
55497cff 174#endif /* HAS_64K_LIMIT */
1050c9ca 175#ifdef DEBUGGING
176 if ((long)size < 0 || (long)count < 0)
4f63d024 177 Perl_croak_nocontext("panic: calloc");
1050c9ca 178#endif
0b7c1c42 179 size *= count;
12ae5dfc 180 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 181 PERL_ALLOC_CHECK(ptr);
97835f67 182 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));
1050c9ca 183 if (ptr != Nullch) {
184 memset((void*)ptr, 0, size);
185 return ptr;
186 }
3280af22 187 else if (PL_nomemok)
1050c9ca 188 return Nullch;
189 else {
e0767201
GA		 190 /* Can't use PerlIO to write as it allocates memory */
191 PerlLIO_write(PerlIO_fileno(Perl_error_log),
192 PL_no_mem, strlen(PL_no_mem));
54aff467 193 my_exit(1);
4e35701f 194 return Nullch;
1050c9ca 195 }
196 /*NOTREACHED*/
197}
198
cae6d0e5
GS		 199/* These must be defined when not using Perl's malloc for binary
200 * compatibility */
201
202#ifndef MYMALLOC
203
204Malloc_t Perl_malloc (MEM_SIZE nbytes)
205{
206 dTHXs;
077a72a9 207 return (Malloc_t)PerlMem_malloc(nbytes);
cae6d0e5
GS		 208}
209
210Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
211{
212 dTHXs;
077a72a9 213 return (Malloc_t)PerlMem_calloc(elements, size);
cae6d0e5
GS		 214}
215
216Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
217{
218 dTHXs;
077a72a9 219 return (Malloc_t)PerlMem_realloc(where, nbytes);
cae6d0e5
GS		 220}
221
222Free_t Perl_mfree (Malloc_t where)
223{
224 dTHXs;
225 PerlMem_free(where);
226}
227
228#endif
229
8d063cd8
LW		 230/* copy a string up to some (non-backslashed) delimiter, if any */
231
232char *
e1ec3a88 233Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
8d063cd8 234{
fc36a67e 235 register I32 tolen;
236 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW		 237 if (*from == '\\') {
238 if (from[1] == delim)
239 from++;
fc36a67e 240 else {
241 if (to < toend)
242 *to++ = *from;
243 tolen++;
244 from++;
245 }
378cc40b 246 }
bedebaa5 247 else if (*from == delim)
8d063cd8 248 break;
fc36a67e 249 if (to < toend)
250 *to++ = *from;
8d063cd8 251 }
bedebaa5
CS		 252 if (to < toend)
253 *to = '\0';
fc36a67e 254 *retlen = tolen;
73d840c0 255 return (char *)from;
8d063cd8
LW		 256}
257
258/* return ptr to little string in big string, NULL if not found */
378cc40b 259/* This routine was donated by Corey Satten. */
8d063cd8
LW		 260
261char *
864dbfa3 262Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 263{
79072805 264 register I32 first;
378cc40b 265
a687059c 266 if (!little)
08105a92 267 return (char*)big;
a687059c 268 first = *little++;
378cc40b 269 if (!first)
08105a92 270 return (char*)big;
378cc40b 271 while (*big) {
66a1b24b 272 register const char *s, *x;
378cc40b
LW		 273 if (*big++ != first)
274 continue;
275 for (x=big,s=little; *s; /**/ ) {
276 if (!*x)
277 return Nullch;
278 if (*s++ != *x++) {
279 s--;
280 break;
281 }
282 }
283 if (!*s)
08105a92 284 return (char*)(big-1);
378cc40b
LW		 285 }
286 return Nullch;
287}
8d063cd8 288
a687059c
LW		 289/* same as instr but allow embedded nulls */
290
291char *
864dbfa3 292Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
8d063cd8 293{
e1ec3a88 294 register const I32 first = *little;
08105a92 295 register const char *littleend = lend;
378cc40b 296
a0d0e21e 297 if (!first && little >= littleend)
08105a92 298 return (char*)big;
de3bb511
LW		 299 if (bigend - big < littleend - little)
300 return Nullch;
a687059c
LW		 301 bigend -= littleend - little++;
302 while (big <= bigend) {
66a1b24b 303 register const char *s, *x;
a687059c
LW		 304 if (*big++ != first)
305 continue;
306 for (x=big,s=little; s < littleend; /**/ ) {
307 if (*s++ != *x++) {
308 s--;
309 break;
310 }
311 }
312 if (s >= littleend)
08105a92 313 return (char*)(big-1);
378cc40b 314 }
a687059c
LW		 315 return Nullch;
316}
317
318/* reverse of the above--find last substring */
319
320char *
864dbfa3 321Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 322{
08105a92 323 register const char *bigbeg;
e1ec3a88 324 register const I32 first = *little;
08105a92 325 register const char *littleend = lend;
a687059c 326
a0d0e21e 327 if (!first && little >= littleend)
08105a92 328 return (char*)bigend;
a687059c
LW		 329 bigbeg = big;
330 big = bigend - (littleend - little++);
331 while (big >= bigbeg) {
66a1b24b 332 register const char *s, *x;
a687059c
LW		 333 if (*big-- != first)
334 continue;
335 for (x=big+2,s=little; s < littleend; /**/ ) {
336 if (*s++ != *x++) {
337 s--;
338 break;
339 }
340 }
341 if (s >= littleend)
08105a92 342 return (char*)(big+1);
378cc40b 343 }
a687059c 344 return Nullch;
378cc40b 345}
a687059c 346
cf93c79d
IZ		 347#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
348
349/* As a space optimization, we do not compile tables for strings of length
350 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
351 special-cased in fbm_instr().
352
353 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
354
954c1994 355/*
ccfc67b7
JH		 356=head1 Miscellaneous Functions
357
954c1994
GS		 358=for apidoc fbm_compile
359
360Analyses the string in order to make fast searches on it using fbm_instr()
361-- the Boyer-Moore algorithm.
362
363=cut
364*/
365
378cc40b 366void
7506f9c3 367Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 368{
9cbe880b 369 const register U8 *s;
942e002e 370 register U8 *table;
79072805 371 register U32 i;
0b71040e 372 STRLEN len;
79072805
LW		 373 I32 rarest = 0;
374 U32 frequency = 256;
375
c517dc2b
JH		 376 if (flags & FBMcf_TAIL) {
377 MAGIC *mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
cf93c79d 378 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
c517dc2b
JH		 379 if (mg && mg->mg_len >= 0)
380 mg->mg_len++;
381 }
9cbe880b 382 s = (U8*)SvPV_force_mutable(sv, len);
862a34c6 383 SvUPGRADE(sv, SVt_PVBM);
d1be9408 384 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 385 return;
02128f11 386 if (len > 2) {
9cbe880b 387 const unsigned char *sb;
66a1b24b 388 const U8 mlen = (len>255) ? 255 : (U8)len;
cf93c79d 389
7506f9c3 390 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
9cbe880b 391 table = (unsigned char*)(SvPVX_mutable(sv) + len + FBM_TABLE_OFFSET);
7506f9c3
GS		 392 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
393 memset((void*)table, mlen, 256);
394 table[-1] = (U8)flags;
02128f11 395 i = 0;
7506f9c3 396 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ		 397 while (s >= sb) {
398 if (table[*s] == mlen)
7506f9c3 399 table[*s] = (U8)i;
cf93c79d
IZ		 400 s--, i++;
401 }
378cc40b 402 }
14befaf4 403 sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */
79072805 404 SvVALID_on(sv);
378cc40b 405
9cbe880b 406 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 407 for (i = 0; i < len; i++) {
22c35a8c 408 if (PL_freq[s[i]] < frequency) {
bbce6d69 409 rarest = i;
22c35a8c 410 frequency = PL_freq[s[i]];
378cc40b
LW		 411 }
412 }
79072805 413 BmRARE(sv) = s[rarest];
eb160463 414 BmPREVIOUS(sv) = (U16)rarest;
cf93c79d
IZ		 415 BmUSEFUL(sv) = 100; /* Initial value */
416 if (flags & FBMcf_TAIL)
417 SvTAIL_on(sv);
7506f9c3
GS		 418 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
419 BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW		 420}
421
cf93c79d
IZ		 422/* If SvTAIL(littlestr), it has a fake '\n' at end. */
423/* If SvTAIL is actually due to \Z or \z, this gives false positives
424 if multiline */
425
954c1994
GS		 426/*
427=for apidoc fbm_instr
428
429Returns the location of the SV in the string delimited by C<str> and
430C<strend>. It returns C<Nullch> if the string can't be found. The C<sv>
431does not have to be fbm_compiled, but the search will not be as fast
432then.
433
434=cut
435*/
436
378cc40b 437char *
864dbfa3 438Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 439{
a687059c 440 register unsigned char *s;
cf93c79d 441 STRLEN l;
9cbe880b
NC		 442 register const unsigned char *little
443 = (const unsigned char *)SvPV_const(littlestr,l);
cf93c79d 444 register STRLEN littlelen = l;
e1ec3a88 445 register const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 446
eb160463 447 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 448 if ( SvTAIL(littlestr)
eb160463 449 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 450 && (littlelen == 1
12ae5dfc 451 || (*big == *little &&
27da23d5 452 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d
IZ		 453 return (char*)big;
454 return Nullch;
455 }
378cc40b 456
cf93c79d 457 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ		 458
459 if (littlelen == 1) {
460 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
461 /* Know that bigend != big. */
462 if (bigend[-1] == '\n')
463 return (char *)(bigend - 1);
464 return (char *) bigend;
465 }
466 s = big;
467 while (s < bigend) {
468 if (*s == *little)
469 return (char *)s;
470 s++;
471 }
472 if (SvTAIL(littlestr))
473 return (char *) bigend;
474 return Nullch;
475 }
476 if (!littlelen)
477 return (char*)big; /* Cannot be SvTAIL! */
478
479 /* littlelen is 2 */
480 if (SvTAIL(littlestr) && !multiline) {
481 if (bigend[-1] == '\n' && bigend[-2] == *little)
482 return (char*)bigend - 2;
483 if (bigend[-1] == *little)
484 return (char*)bigend - 1;
485 return Nullch;
486 }
487 {
488 /* This should be better than FBM if c1 == c2, and almost
489 as good otherwise: maybe better since we do less indirection.
490 And we save a lot of memory by caching no table. */
66a1b24b
AL		 491 const unsigned char c1 = little[0];
492 const unsigned char c2 = little[1];
cf93c79d
IZ		 493
494 s = big + 1;
495 bigend--;
496 if (c1 != c2) {
497 while (s <= bigend) {
498 if (s[0] == c2) {
499 if (s[-1] == c1)
500 return (char*)s - 1;
501 s += 2;
502 continue;
3fe6f2dc 503 }
cf93c79d
IZ		 504 next_chars:
505 if (s[0] == c1) {
506 if (s == bigend)
507 goto check_1char_anchor;
508 if (s[1] == c2)
509 return (char*)s;
510 else {
511 s++;
512 goto next_chars;
513 }
514 }
515 else
516 s += 2;
517 }
518 goto check_1char_anchor;
519 }
520 /* Now c1 == c2 */
521 while (s <= bigend) {
522 if (s[0] == c1) {
523 if (s[-1] == c1)
524 return (char*)s - 1;
525 if (s == bigend)
526 goto check_1char_anchor;
527 if (s[1] == c1)
528 return (char*)s;
529 s += 3;
02128f11 530 }
c277df42 531 else
cf93c79d 532 s += 2;
c277df42 533 }
c277df42 534 }
cf93c79d
IZ		 535 check_1char_anchor: /* One char and anchor! */
536 if (SvTAIL(littlestr) && (*bigend == *little))
537 return (char *)bigend; /* bigend is already decremented. */
538 return Nullch;
d48672a2 539 }
cf93c79d 540 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 541 s = bigend - littlelen;
a1d180c4 542 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ		 543 /* Automatically of length > 2 */
544 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 545 {
bbce6d69 546 return (char*)s; /* how sweet it is */
7506f9c3
GS		 547 }
548 if (s[1] == *little
549 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
550 {
cf93c79d 551 return (char*)s + 1; /* how sweet it is */
7506f9c3 552 }
02128f11
IZ		 553 return Nullch;
554 }
cf93c79d
IZ		 555 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
556 char *b = ninstr((char*)big,(char*)bigend,
557 (char*)little, (char*)little + littlelen);
558
559 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
560 /* Chop \n from littlestr: */
561 s = bigend - littlelen + 1;
7506f9c3
GS		 562 if (*s == *little
563 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
564 {
3fe6f2dc 565 return (char*)s;
7506f9c3 566 }
cf93c79d 567 return Nullch;
a687059c 568 }
cf93c79d 569 return b;
a687059c 570 }
a1d180c4 571
cf93c79d 572 { /* Do actual FBM. */
e1ec3a88 573 register const unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
9cbe880b 574 const register unsigned char *oldlittle;
cf93c79d 575
eb160463 576 if (littlelen > (STRLEN)(bigend - big))
cf93c79d
IZ		 577 return Nullch;
578 --littlelen; /* Last char found by table lookup */
579
580 s = big + littlelen;
581 little += littlelen; /* last char */
582 oldlittle = little;
583 if (s < bigend) {
584 register I32 tmp;
585
586 top2:
587 /*SUPPRESS 560*/
7506f9c3 588 if ((tmp = table[*s])) {
cf93c79d 589 if ((s += tmp) < bigend)
62b28dd9 590 goto top2;
cf93c79d
IZ		 591 goto check_end;
592 }
593 else { /* less expensive than calling strncmp() */
66a1b24b 594 register unsigned char * const olds = s;
cf93c79d
IZ		 595
596 tmp = littlelen;
597
598 while (tmp--) {
599 if (*--s == *--little)
600 continue;
cf93c79d
IZ		 601 s = olds + 1; /* here we pay the price for failure */
602 little = oldlittle;
603 if (s < bigend) /* fake up continue to outer loop */
604 goto top2;
605 goto check_end;
606 }
607 return (char *)s;
a687059c 608 }
378cc40b 609 }
cf93c79d
IZ		 610 check_end:
611 if ( s == bigend && (table[-1] & FBMcf_TAIL)
12ae5dfc
JH		 612 && memEQ((char *)(bigend - littlelen),
613 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d
IZ		 614 return (char*)bigend - littlelen;
615 return Nullch;
378cc40b 616 }
378cc40b
LW		 617}
618
c277df42
IZ		 619/* start_shift, end_shift are positive quantities which give offsets
620 of ends of some substring of bigstr.
a0288114 621 If "last" we want the last occurrence.
c277df42 622 old_posp is the way of communication between consequent calls if
a1d180c4 623 the next call needs to find the .
c277df42 624 The initial *old_posp should be -1.
cf93c79d
IZ		 625
626 Note that we take into account SvTAIL, so one can get extra
627 optimizations if _ALL flag is set.
c277df42
IZ		 628 */
629
cf93c79d 630/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 631 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ		 632 is not supported yet. */
633
378cc40b 634char *
864dbfa3 635Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 636{
a687059c 637 register unsigned char *big;
79072805
LW		 638 register I32 pos;
639 register I32 previous;
640 register I32 first;
a687059c 641 register unsigned char *little;
c277df42 642 register I32 stop_pos;
a687059c 643 register unsigned char *littleend;
c277df42 644 I32 found = 0;
378cc40b 645
c277df42 646 if (*old_posp == -1
3280af22 647 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 648 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
649 cant_find:
a1d180c4 650 if ( BmRARE(littlestr) == '\n'
cf93c79d
IZ		 651 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
652 little = (unsigned char *)(SvPVX(littlestr));
653 littleend = little + SvCUR(littlestr);
654 first = *little++;
655 goto check_tail;
656 }
378cc40b 657 return Nullch;
cf93c79d
IZ		 658 }
659
463ee0b2 660 little = (unsigned char *)(SvPVX(littlestr));
79072805 661 littleend = little + SvCUR(littlestr);
378cc40b 662 first = *little++;
c277df42 663 /* The value of pos we can start at: */
79072805 664 previous = BmPREVIOUS(littlestr);
463ee0b2 665 big = (unsigned char *)(SvPVX(bigstr));
c277df42
IZ		 666 /* The value of pos we can stop at: */
667 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 668 if (previous + start_shift > stop_pos) {
0fe87f7c
HS		 669/*
670 stop_pos does not include SvTAIL in the count, so this check is incorrect
671 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
672*/
673#if 0
cf93c79d
IZ		 674 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
675 goto check_tail;
0fe87f7c 676#endif
cf93c79d
IZ		 677 return Nullch;
678 }
c277df42 679 while (pos < previous + start_shift) {
3280af22 680 if (!(pos += PL_screamnext[pos]))
cf93c79d 681 goto cant_find;
378cc40b 682 }
de3bb511 683 big -= previous;
bbce6d69 684 do {
66a1b24b 685 register unsigned char *s, *x;
ef64f398 686 if (pos >= stop_pos) break;
bbce6d69 687 if (big[pos] != first)
688 continue;
689 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69 690 if (*s++ != *x++) {
691 s--;
692 break;
378cc40b 693 }
bbce6d69 694 }
c277df42
IZ		 695 if (s == littleend) {
696 *old_posp = pos;
697 if (!last) return (char *)(big+pos);
698 found = 1;
699 }
3280af22 700 } while ( pos += PL_screamnext[pos] );
a1d180c4 701 if (last && found)
cf93c79d 702 return (char *)(big+(*old_posp));
cf93c79d
IZ		 703 check_tail:
704 if (!SvTAIL(littlestr) || (end_shift > 0))
705 return Nullch;
706 /* Ignore the trailing "\n". This code is not microoptimized */
707 big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr));
708 stop_pos = littleend - little; /* Actual littlestr len */
709 if (stop_pos == 0)
710 return (char*)big;
711 big -= stop_pos;
712 if (*big == first
12ae5dfc
JH		 713 && ((stop_pos == 1) ||
714 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d
IZ		 715 return (char*)big;
716 return Nullch;
8d063cd8
LW		 717}
718
79072805 719I32
864dbfa3 720Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 721{
e1ec3a88
AL		 722 register const U8 *a = (const U8 *)s1;
723 register const U8 *b = (const U8 *)s2;
79072805 724 while (len--) {
22c35a8c 725 if (*a != *b && *a != PL_fold[*b])
bbce6d69 726 return 1;
727 a++,b++;
728 }
729 return 0;
730}
731
732I32
864dbfa3 733Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 734{
27da23d5 735 dVAR;
e1ec3a88
AL		 736 register const U8 *a = (const U8 *)s1;
737 register const U8 *b = (const U8 *)s2;
bbce6d69 738 while (len--) {
22c35a8c 739 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69 740 return 1;
741 a++,b++;
79072805
LW		 742 }
743 return 0;
744}
745
8d063cd8
LW		 746/* copy a string to a safe spot */
747
954c1994 748/*
ccfc67b7
JH		 749=head1 Memory Management
750
954c1994
GS		 751=for apidoc savepv
752
61a925ed
AMS		 753Perl's version of C<strdup()>. Returns a pointer to a newly allocated
754string which is a duplicate of C<pv>. The size of the string is
755determined by C<strlen()>. The memory allocated for the new string can
756be freed with the C<Safefree()> function.
954c1994
GS		 757
758=cut
759*/
760
8d063cd8 761char *
efdfce31 762Perl_savepv(pTHX_ const char *pv)
8d063cd8 763{
e90e2364
NC		 764 if (!pv)
765 return Nullch;
66a1b24b
AL		 766 else {
767 char *newaddr;
768 const STRLEN pvlen = strlen(pv)+1;
769 New(902,newaddr,pvlen,char);
770 return strcpy(newaddr,pv);
771 }
e90e2364 772
8d063cd8
LW		 773}
774
a687059c
LW		 775/* same thing but with a known length */
776
954c1994
GS		 777/*
778=for apidoc savepvn
779
61a925ed
AMS		 780Perl's version of what C<strndup()> would be if it existed. Returns a
781pointer to a newly allocated string which is a duplicate of the first
782C<len> bytes from C<pv>. The memory allocated for the new string can be
783freed with the C<Safefree()> function.
954c1994
GS		 784
785=cut
786*/
787
a687059c 788char *
efdfce31 789Perl_savepvn(pTHX_ const char *pv, register I32 len)
a687059c
LW		 790{
791 register char *newaddr;
792
793 New(903,newaddr,len+1,char);
92110913 794 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 795 if (pv) {
e90e2364
NC		 796 /* might not be null terminated */
797 newaddr[len] = '\0';
07409e01 798 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS		 799 }
800 else {
07409e01 801 return (char *) ZeroD(newaddr,len+1,char);
92110913 802 }
a687059c
LW		 803}
804
05ec9bb3
NIS		 805/*
806=for apidoc savesharedpv
807
61a925ed
AMS		 808A version of C<savepv()> which allocates the duplicate string in memory
809which is shared between threads.
05ec9bb3
NIS		 810
811=cut
812*/
813char *
efdfce31 814Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 815{
e90e2364
NC		 816 register char *newaddr;
817 if (!pv)
818 return Nullch;
819
820 newaddr = (char*)PerlMemShared_malloc(strlen(pv)+1);
821 if (!newaddr) {
822 PerlLIO_write(PerlIO_fileno(Perl_error_log),
823 PL_no_mem, strlen(PL_no_mem));
824 my_exit(1);
05ec9bb3 825 }
e90e2364 826 return strcpy(newaddr,pv);
05ec9bb3
NIS		 827}
828
2e0de35c
NC		 829/*
830=for apidoc savesvpv
831
6832267f 832A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC		 833the passed in SV using C<SvPV()>
834
835=cut
836*/
837
838char *
839Perl_savesvpv(pTHX_ SV *sv)
840{
841 STRLEN len;
e62f0680 842 const char *pv = SvPV_const(sv, len);
2e0de35c
NC		 843 register char *newaddr;
844
26866f99
NC		 845 ++len;
846 New(903,newaddr,len,char);
07409e01 847 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 848}
05ec9bb3
NIS		 849
850
cea2e8a9 851/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 852
76e3520e 853STATIC SV *
cea2e8a9 854S_mess_alloc(pTHX)
fc36a67e 855{
856 SV *sv;
857 XPVMG *any;
858
e72dc28c
GS		 859 if (!PL_dirty)
860 return sv_2mortal(newSVpvn("",0));
861
0372dbb6
GS		 862 if (PL_mess_sv)
863 return PL_mess_sv;
864
fc36a67e 865 /* Create as PVMG now, to avoid any upgrading later */
866 New(905, sv, 1, SV);
867 Newz(905, any, 1, XPVMG);
868 SvFLAGS(sv) = SVt_PVMG;
869 SvANY(sv) = (void*)any;
cace1726 870 SvPV_set(sv, 0);
fc36a67e 871 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 872 PL_mess_sv = sv;
fc36a67e 873 return sv;
874}
875
c5be433b 876#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 877char *
878Perl_form_nocontext(const char* pat, ...)
879{
880 dTHX;
c5be433b 881 char *retval;
cea2e8a9
GS		 882 va_list args;
883 va_start(args, pat);
c5be433b 884 retval = vform(pat, &args);
cea2e8a9 885 va_end(args);
c5be433b 886 return retval;
cea2e8a9 887}
c5be433b 888#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 889
7c9e965c 890/*
ccfc67b7 891=head1 Miscellaneous Functions
7c9e965c
JP		 892=for apidoc form
893
894Takes a sprintf-style format pattern and conventional
895(non-SV) arguments and returns the formatted string.
896
897 (char *) Perl_form(pTHX_ const char* pat, ...)
898
899can be used any place a string (char *) is required:
900
901 char * s = Perl_form("%d.%d",major,minor);
902
903Uses a single private buffer so if you want to format several strings you
904must explicitly copy the earlier strings away (and free the copies when you
905are done).
906
907=cut
908*/
909
8990e307 910char *
864dbfa3 911Perl_form(pTHX_ const char* pat, ...)
8990e307 912{
c5be433b 913 char *retval;
46fc3d4c 914 va_list args;
46fc3d4c 915 va_start(args, pat);
c5be433b 916 retval = vform(pat, &args);
46fc3d4c 917 va_end(args);
c5be433b
GS		 918 return retval;
919}
920
921char *
922Perl_vform(pTHX_ const char *pat, va_list *args)
923{
924 SV *sv = mess_alloc();
925 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
e72dc28c 926 return SvPVX(sv);
46fc3d4c 927}
a687059c 928
5a844595
GS		 929#if defined(PERL_IMPLICIT_CONTEXT)
930SV *
931Perl_mess_nocontext(const char *pat, ...)
932{
933 dTHX;
934 SV *retval;
935 va_list args;
936 va_start(args, pat);
937 retval = vmess(pat, &args);
938 va_end(args);
939 return retval;
940}
941#endif /* PERL_IMPLICIT_CONTEXT */
942
06bf62c7 943SV *
5a844595
GS		 944Perl_mess(pTHX_ const char *pat, ...)
945{
946 SV *retval;
947 va_list args;
948 va_start(args, pat);
949 retval = vmess(pat, &args);
950 va_end(args);
951 return retval;
952}
953
ae7d165c
PJ		 954STATIC COP*
955S_closest_cop(pTHX_ COP *cop, OP *o)
956{
957 /* Look for PL_op starting from o. cop is the last COP we've seen. */
958
959 if (!o || o == PL_op) return cop;
960
961 if (o->op_flags & OPf_KIDS) {
962 OP *kid;
963 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
964 {
965 COP *new_cop;
966
967 /* If the OP_NEXTSTATE has been optimised away we can still use it
968 * the get the file and line number. */
969
970 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
971 cop = (COP *)kid;
972
973 /* Keep searching, and return when we've found something. */
974
975 new_cop = closest_cop(cop, kid);
976 if (new_cop) return new_cop;
977 }
978 }
979
980 /* Nothing found. */
981
982 return 0;
983}
984
5a844595
GS		 985SV *
986Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 987{
e72dc28c 988 SV *sv = mess_alloc();
27da23d5 989 static const char dgd[] = " during global destruction.\n";
46fc3d4c 990
fc36a67e 991 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
46fc3d4c 992 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ		 993
994 /*
995 * Try and find the file and line for PL_op. This will usually be
996 * PL_curcop, but it might be a cop that has been optimised away. We
997 * can try to find such a cop by searching through the optree starting
998 * from the sibling of PL_curcop.
999 */
1000
e1ec3a88 1001 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
ae7d165c
PJ		 1002 if (!cop) cop = PL_curcop;
1003
1004 if (CopLINE(cop))
ed094faf 1005 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
3aed30dc 1006 OutCopFILE(cop), (IV)CopLINE(cop));
2035c5e8 1007 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
e1ec3a88 1008 const bool line_mode = (RsSIMPLE(PL_rs) &&
95a20fc0 1009 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
57def98f 1010 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
edc2eac3
JH		 1011 PL_last_in_gv == PL_argvgv ?
1012 "" : GvNAME(PL_last_in_gv),
1013 line_mode ? "line" : "chunk",
1014 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1015 }
515f54a1 1016 sv_catpv(sv, PL_dirty ? dgd : ".\n");
a687059c 1017 }
06bf62c7 1018 return sv;
a687059c
LW		 1019}
1020
7ff03255
SG		 1021void
1022Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1023{
27da23d5 1024 dVAR;
7ff03255
SG		 1025 IO *io;
1026 MAGIC *mg;
1027
1028 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1029 && (io = GvIO(PL_stderrgv))
1030 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
1031 {
1032 dSP;
1033 ENTER;
1034 SAVETMPS;
1035
1036 save_re_context();
1037 SAVESPTR(PL_stderrgv);
1038 PL_stderrgv = Nullgv;
1039
1040 PUSHSTACKi(PERLSI_MAGIC);
1041
1042 PUSHMARK(SP);
1043 EXTEND(SP,2);
1044 PUSHs(SvTIED_obj((SV*)io, mg));
1045 PUSHs(sv_2mortal(newSVpvn(message, msglen)));
1046 PUTBACK;
1047 call_method("PRINT", G_SCALAR);
1048
1049 POPSTACK;
1050 FREETMPS;
1051 LEAVE;
1052 }
1053 else {
1054#ifdef USE_SFIO
1055 /* SFIO can really mess with your errno */
1056 int e = errno;
1057#endif
1058 PerlIO *serr = Perl_error_log;
1059
1060 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1061 (void)PerlIO_flush(serr);
1062#ifdef USE_SFIO
1063 errno = e;
1064#endif
1065 }
1066}
1067
3ab1ac99
NC		 1068/* Common code used by vcroak, vdie and vwarner */
1069
e07360fa 1070STATIC void
63315e18
NC		 1071S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8)
1072{
1073 HV *stash;
1074 GV *gv;
1075 CV *cv;
1076 /* sv_2cv might call Perl_croak() */
1077 SV *olddiehook = PL_diehook;
1078
1079 assert(PL_diehook);
1080 ENTER;
1081 SAVESPTR(PL_diehook);
1082 PL_diehook = Nullsv;
1083 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1084 LEAVE;
1085 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1086 dSP;
1087 SV *msg;
1088
1089 ENTER;
1090 save_re_context();
1091 if (message) {
1092 msg = newSVpvn(message, msglen);
1093 SvFLAGS(msg) |= utf8;
1094 SvREADONLY_on(msg);
1095 SAVEFREESV(msg);
1096 }
1097 else {
1098 msg = ERRSV;
1099 }
1100
1101 PUSHSTACKi(PERLSI_DIEHOOK);
1102 PUSHMARK(SP);
1103 XPUSHs(msg);
1104 PUTBACK;
1105 call_sv((SV*)cv, G_DISCARD);
1106 POPSTACK;
1107 LEAVE;
1108 }
1109}
1110
e07360fa
AT		 1111STATIC char *
1112S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1113 I32* utf8)
1114{
1115 dVAR;
1116 char *message;
1117
1118 if (pat) {
1119 SV *msv = vmess(pat, args);
1120 if (PL_errors && SvCUR(PL_errors)) {
1121 sv_catsv(PL_errors, msv);
1122 message = SvPV(PL_errors, *msglen);
1123 SvCUR_set(PL_errors, 0);
1124 }
1125 else
1126 message = SvPV(msv,*msglen);
1127 *utf8 = SvUTF8(msv);
1128 }
1129 else {
1130 message = Nullch;
1131 }
1132
1133 DEBUG_S(PerlIO_printf(Perl_debug_log,
1134 "%p: die/croak: message = %s\ndiehook = %p\n",
1135 thr, message, PL_diehook));
1136 if (PL_diehook) {
1137 S_vdie_common(aTHX_ message, *msglen, *utf8);
1138 }
1139 return message;
1140}
1141
c5be433b
GS		 1142OP *
1143Perl_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1144{
73d840c0 1145 const char *message;
e1ec3a88 1146 const int was_in_eval = PL_in_eval;
06bf62c7 1147 STRLEN msglen;
ff882698 1148 I32 utf8 = 0;
36477c24 1149
bf49b057 1150 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1151 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1152 thr, PL_curstack, PL_mainstack));
36477c24 1153
3ab1ac99 1154 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
36477c24 1155
06bf62c7 1156 PL_restartop = die_where(message, msglen);
ff882698 1157 SvFLAGS(ERRSV) |= utf8;
bf49b057 1158 DEBUG_S(PerlIO_printf(Perl_debug_log,
7c06b590 1159 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1160 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1161 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1162 JMPENV_JUMP(3);
3280af22 1163 return PL_restartop;
36477c24 1164}
1165
c5be433b 1166#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1167OP *
1168Perl_die_nocontext(const char* pat, ...)
a687059c 1169{
cea2e8a9
GS		 1170 dTHX;
1171 OP *o;
a687059c 1172 va_list args;
cea2e8a9 1173 va_start(args, pat);
c5be433b 1174 o = vdie(pat, &args);
cea2e8a9
GS		 1175 va_end(args);
1176 return o;
1177}
c5be433b 1178#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS		 1179
1180OP *
1181Perl_die(pTHX_ const char* pat, ...)
1182{
1183 OP *o;
1184 va_list args;
1185 va_start(args, pat);
c5be433b 1186 o = vdie(pat, &args);
cea2e8a9
GS		 1187 va_end(args);
1188 return o;
1189}
1190
c5be433b
GS		 1191void
1192Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1193{
73d840c0 1194 const char *message;
06bf62c7 1195 STRLEN msglen;
ff882698 1196 I32 utf8 = 0;
a687059c 1197
3ab1ac99 1198 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
5a844595 1199
3280af22 1200 if (PL_in_eval) {
06bf62c7 1201 PL_restartop = die_where(message, msglen);
ff882698 1202 SvFLAGS(ERRSV) |= utf8;
6224f72b 1203 JMPENV_JUMP(3);
a0d0e21e 1204 }
84414e3e
JH		 1205 else if (!message)
1206 message = SvPVx(ERRSV, msglen);
1207
7ff03255 1208 write_to_stderr(message, msglen);
f86702cc 1209 my_failure_exit();
a687059c
LW		 1210}
1211
c5be433b 1212#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1213void
cea2e8a9 1214Perl_croak_nocontext(const char *pat, ...)
a687059c 1215{
cea2e8a9 1216 dTHX;
a687059c 1217 va_list args;
cea2e8a9 1218 va_start(args, pat);
c5be433b 1219 vcroak(pat, &args);
cea2e8a9
GS		 1220 /* NOTREACHED */
1221 va_end(args);
1222}
1223#endif /* PERL_IMPLICIT_CONTEXT */
1224
954c1994 1225/*
ccfc67b7
JH		 1226=head1 Warning and Dieing
1227
954c1994
GS		 1228=for apidoc croak
1229
9983fa3c 1230This is the XSUB-writer's interface to Perl's C<die> function.
966353fd
MF		 1231Normally call this function the same way you call the C C<printf>
1232function. Calling C<croak> returns control directly to Perl,
1233sidestepping the normal C order of execution. See C<warn>.
9983fa3c
GS		 1234
1235If you want to throw an exception object, assign the object to
1236C<$@> and then pass C<Nullch> to croak():
1237
1238 errsv = get_sv("@", TRUE);
1239 sv_setsv(errsv, exception_object);
1240 croak(Nullch);
954c1994
GS		 1241
1242=cut
1243*/
1244
cea2e8a9
GS		 1245void
1246Perl_croak(pTHX_ const char *pat, ...)
1247{
1248 va_list args;
1249 va_start(args, pat);
c5be433b 1250 vcroak(pat, &args);
cea2e8a9
GS		 1251 /* NOTREACHED */
1252 va_end(args);
1253}
1254
c5be433b
GS		 1255void
1256Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1257{
27da23d5 1258 dVAR;
de3bb511 1259 char *message;
748a9306
LW		 1260 HV *stash;
1261 GV *gv;
1262 CV *cv;
06bf62c7
GS		 1263 SV *msv;
1264 STRLEN msglen;
ff882698 1265 I32 utf8 = 0;
a687059c 1266
5a844595 1267 msv = vmess(pat, args);
ff882698 1268 utf8 = SvUTF8(msv);
06bf62c7 1269 message = SvPV(msv, msglen);
a687059c 1270
3280af22 1271 if (PL_warnhook) {
cea2e8a9 1272 /* sv_2cv might call Perl_warn() */
3280af22 1273 SV *oldwarnhook = PL_warnhook;
1738f5c4 1274 ENTER;
3280af22
NIS		 1275 SAVESPTR(PL_warnhook);
1276 PL_warnhook = Nullsv;
20cec16a 1277 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS		 1278 LEAVE;
1279 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1280 dSP;
774d564b 1281 SV *msg;
1282
1283 ENTER;
3a1f2dc9 1284 save_re_context();
06bf62c7 1285 msg = newSVpvn(message, msglen);
ff882698 1286 SvFLAGS(msg) |= utf8;
774d564b 1287 SvREADONLY_on(msg);
1288 SAVEFREESV(msg);
1289
e788e7d3 1290 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1291 PUSHMARK(SP);
774d564b 1292 XPUSHs(msg);
20cec16a 1293 PUTBACK;
864dbfa3 1294 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1295 POPSTACK;
774d564b 1296 LEAVE;
20cec16a 1297 return;
1298 }
748a9306 1299 }
87582a92 1300
7ff03255 1301 write_to_stderr(message, msglen);
a687059c 1302}
8d063cd8 1303
c5be433b 1304#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1305void
1306Perl_warn_nocontext(const char *pat, ...)
1307{
1308 dTHX;
1309 va_list args;
1310 va_start(args, pat);
c5be433b 1311 vwarn(pat, &args);
cea2e8a9
GS		 1312 va_end(args);
1313}
1314#endif /* PERL_IMPLICIT_CONTEXT */
1315
954c1994
GS		 1316/*
1317=for apidoc warn
1318
966353fd
MF		 1319This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1320function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS		 1321
1322=cut
1323*/
1324
cea2e8a9
GS		 1325void
1326Perl_warn(pTHX_ const char *pat, ...)
1327{
1328 va_list args;
1329 va_start(args, pat);
c5be433b 1330 vwarn(pat, &args);
cea2e8a9
GS		 1331 va_end(args);
1332}
1333
c5be433b
GS		 1334#if defined(PERL_IMPLICIT_CONTEXT)
1335void
1336Perl_warner_nocontext(U32 err, const char *pat, ...)
1337{
27da23d5 1338 dTHX;
c5be433b
GS		 1339 va_list args;
1340 va_start(args, pat);
1341 vwarner(err, pat, &args);
1342 va_end(args);
1343}
1344#endif /* PERL_IMPLICIT_CONTEXT */
1345
599cee73 1346void
864dbfa3 1347Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM		 1348{
1349 va_list args;
c5be433b
GS		 1350 va_start(args, pat);
1351 vwarner(err, pat, &args);
1352 va_end(args);
1353}
1354
1355void
1356Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1357{
27da23d5 1358 dVAR;
d13b0d77 1359 if (ckDEAD(err)) {
a3b680e6 1360 SV * const msv = vmess(pat, args);
d13b0d77 1361 STRLEN msglen;
e1ec3a88 1362 const char *message = SvPV(msv, msglen);
a3b680e6 1363 const I32 utf8 = SvUTF8(msv);
599cee73 1364
3aed30dc 1365 if (PL_diehook) {
63315e18
NC		 1366 assert(message);
1367 S_vdie_common(aTHX_ message, msglen, utf8);
3aed30dc
HS		 1368 }
1369 if (PL_in_eval) {
1370 PL_restartop = die_where(message, msglen);
ff882698 1371 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS		 1372 JMPENV_JUMP(3);
1373 }
7ff03255 1374 write_to_stderr(message, msglen);
3aed30dc 1375 my_failure_exit();
599cee73
PM		 1376 }
1377 else {
d13b0d77 1378 Perl_vwarn(aTHX_ pat, args);
599cee73
PM		 1379 }
1380}
1381
e6587932
DM		 1382/* since we've already done strlen() for both nam and val
1383 * we can use that info to make things faster than
1384 * sprintf(s, "%s=%s", nam, val)
1385 */
1386#define my_setenv_format(s, nam, nlen, val, vlen) \
1387 Copy(nam, s, nlen, char); \
1388 *(s+nlen) = '='; \
1389 Copy(val, s+(nlen+1), vlen, char); \
1390 *(s+(nlen+1+vlen)) = '\0'
1391
13b6e58c 1392#ifdef USE_ENVIRON_ARRAY
eccd403f 1393 /* VMS' my_setenv() is in vms.c */
2986a63f 1394#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1395void
e1ec3a88 1396Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1397{
27da23d5 1398 dVAR;
4efc5df6
GS		 1399#ifdef USE_ITHREADS
1400 /* only parent thread can modify process environment */
1401 if (PL_curinterp == aTHX)
1402#endif
1403 {
f2517201 1404#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1405 if (!PL_use_safe_putenv) {
f2517201 1406 /* most putenv()s leak, so we manipulate environ directly */
79072805 1407 register I32 i=setenv_getix(nam); /* where does it go? */
e6587932 1408 int nlen, vlen;
8d063cd8 1409
3280af22 1410 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW		 1411 I32 j;
1412 I32 max;
fe14fcc3
LW		 1413 char **tmpenv;
1414
de3bb511 1415 /*SUPPRESS 530*/
fe14fcc3 1416 for (max = i; environ[max]; max++) ;
f2517201
GS		 1417 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1418 for (j=0; j<max; j++) { /* copy environment */
e1ec3a88 1419 const int len = strlen(environ[j]);
3aed30dc
HS		 1420 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1421 Copy(environ[j], tmpenv[j], len+1, char);
f2517201 1422 }
fe14fcc3
LW		 1423 tmpenv[max] = Nullch;
1424 environ = tmpenv; /* tell exec where it is now */
1425 }
a687059c 1426 if (!val) {
f2517201 1427 safesysfree(environ[i]);
a687059c
LW		 1428 while (environ[i]) {
1429 environ[i] = environ[i+1];
1430 i++;
1431 }
1432 return;
1433 }
8d063cd8 1434 if (!environ[i]) { /* does not exist yet */
f2517201 1435 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW		 1436 environ[i+1] = Nullch; /* make sure it's null terminated */
1437 }
fe14fcc3 1438 else
f2517201 1439 safesysfree(environ[i]);
e6587932
DM		 1440 nlen = strlen(nam);
1441 vlen = strlen(val);
f2517201 1442
e6587932
DM		 1443 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1444 /* all that work just for this */
1445 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95
MS		 1446 } else {
1447# endif
27da23d5 1448# if defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
47dafe4d
EF		 1449 setenv(nam, val, 1);
1450# else
f2517201 1451 char *new_env;
e6587932
DM		 1452 int nlen = strlen(nam), vlen;
1453 if (!val) {
3aed30dc 1454 val = "";
e6587932
DM		 1455 }
1456 vlen = strlen(val);
1457 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1458 /* all that work just for this */
1459 my_setenv_format(new_env, nam, nlen, val, vlen);
f2517201 1460 (void)putenv(new_env);
47dafe4d 1461# endif /* __CYGWIN__ */
50acdf95
MS		 1462#ifndef PERL_USE_SAFE_PUTENV
1463 }
1464#endif
4efc5df6 1465 }
8d063cd8
LW		 1466}
1467
2986a63f 1468#else /* WIN32 || NETWARE */
68dc0745 1469
1470void
72229eff 1471Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1472{
27da23d5 1473 dVAR;
ac5c734f 1474 register char *envstr;
e1ec3a88
AL		 1475 const int nlen = strlen(nam);
1476 int vlen;
e6587932 1477
ac5c734f
GS		 1478 if (!val) {
1479 val = "";
1480 }
e6587932
DM		 1481 vlen = strlen(val);
1482 New(904, envstr, nlen+vlen+2, char);
1483 my_setenv_format(envstr, nam, nlen, val, vlen);
ac5c734f
GS		 1484 (void)PerlEnv_putenv(envstr);
1485 Safefree(envstr);
3e3baf6d
TB		 1486}
1487
2986a63f 1488#endif /* WIN32 || NETWARE */
3e3baf6d 1489
2f42fcb0 1490#ifndef PERL_MICRO
3e3baf6d 1491I32
e1ec3a88 1492Perl_setenv_getix(pTHX_ const char *nam)
3e3baf6d
TB		 1493{
1494 register I32 i, len = strlen(nam);
1495
1496 for (i = 0; environ[i]; i++) {
1497 if (
1498#ifdef WIN32
1499 strnicmp(environ[i],nam,len) == 0
1500#else
1501 strnEQ(environ[i],nam,len)
1502#endif
1503 && environ[i][len] == '=')
1504 break; /* strnEQ must come first to avoid */
1505 } /* potential SEGV's */
1506 return i;
68dc0745 1507}
2f42fcb0 1508#endif /* !PERL_MICRO */
68dc0745 1509
ed79a026 1510#endif /* !VMS && !EPOC*/
378cc40b 1511
16d20bd9 1512#ifdef UNLINK_ALL_VERSIONS
79072805 1513I32
864dbfa3 1514Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
378cc40b 1515{
79072805 1516 I32 i;
378cc40b 1517
6ad3d225 1518 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW		 1519 return i ? 0 : -1;
1520}
1521#endif
1522
7a3f2258 1523/* this is a drop-in replacement for bcopy() */
2253333f 1524#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1525char *
7a3f2258 1526Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b
LW		 1527{
1528 char *retval = to;
1529
7c0587c8
LW		 1530 if (from - to >= 0) {
1531 while (len--)
1532 *to++ = *from++;
1533 }
1534 else {
1535 to += len;
1536 from += len;
1537 while (len--)
faf8582f 1538 *(--to) = *(--from);
7c0587c8 1539 }
378cc40b
LW		 1540 return retval;
1541}
ffed7fef 1542#endif
378cc40b 1543
7a3f2258 1544/* this is a drop-in replacement for memset() */
fc36a67e 1545#ifndef HAS_MEMSET
1546void *
7a3f2258 1547Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1548{
1549 char *retval = loc;
1550
1551 while (len--)
1552 *loc++ = ch;
1553 return retval;
1554}
1555#endif
1556
7a3f2258 1557/* this is a drop-in replacement for bzero() */
7c0587c8 1558#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1559char *
7a3f2258 1560Perl_my_bzero(register char *loc, register I32 len)
378cc40b
LW		 1561{
1562 char *retval = loc;
1563
1564 while (len--)
1565 *loc++ = 0;
1566 return retval;
1567}
1568#endif
7c0587c8 1569
7a3f2258 1570/* this is a drop-in replacement for memcmp() */
36477c24 1571#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1572I32
7a3f2258 1573Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1574{
e1ec3a88
AL		 1575 register const U8 *a = (const U8 *)s1;
1576 register const U8 *b = (const U8 *)s2;
79072805 1577 register I32 tmp;
7c0587c8
LW		 1578
1579 while (len--) {
27da23d5 1580 if ((tmp = *a++ - *b++))
7c0587c8
LW		 1581 return tmp;
1582 }
1583 return 0;
1584}
36477c24 1585#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1586
fe14fcc3 1587#ifndef HAS_VPRINTF
a687059c 1588
85e6fe83 1589#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1590char *
1591#else
1592int
1593#endif
08105a92 1594vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 1595{
1596 FILE fakebuf;
1597
1598 fakebuf._ptr = dest;
1599 fakebuf._cnt = 32767;
35c8bce7
LW		 1600#ifndef _IOSTRG
1601#define _IOSTRG 0
1602#endif
a687059c
LW		 1603 fakebuf._flag = _IOWRT|_IOSTRG;
1604 _doprnt(pat, args, &fakebuf); /* what a kludge */
1605 (void)putc('\0', &fakebuf);
85e6fe83 1606#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1607 return(dest);
1608#else
1609 return 0; /* perl doesn't use return value */
1610#endif
1611}
1612
fe14fcc3 1613#endif /* HAS_VPRINTF */
a687059c
LW		 1614
1615#ifdef MYSWAP
ffed7fef 1616#if BYTEORDER != 0x4321
a687059c 1617short
864dbfa3 1618Perl_my_swap(pTHX_ short s)
a687059c
LW		 1619{
1620#if (BYTEORDER & 1) == 0
1621 short result;
1622
1623 result = ((s & 255) << 8) + ((s >> 8) & 255);
1624 return result;
1625#else
1626 return s;
1627#endif
1628}
1629
1630long
864dbfa3 1631Perl_my_htonl(pTHX_ long l)
a687059c
LW		 1632{
1633 union {
1634 long result;
ffed7fef 1635 char c[sizeof(long)];
a687059c
LW		 1636 } u;
1637
ffed7fef 1638#if BYTEORDER == 0x1234
a687059c
LW		 1639 u.c[0] = (l >> 24) & 255;
1640 u.c[1] = (l >> 16) & 255;
1641 u.c[2] = (l >> 8) & 255;
1642 u.c[3] = l & 255;
1643 return u.result;
1644#else
ffed7fef 1645#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1646 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1647#else
79072805
LW		 1648 register I32 o;
1649 register I32 s;
a687059c 1650
ffed7fef
LW		 1651 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1652 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 1653 }
1654 return u.result;
1655#endif
1656#endif
1657}
1658
1659long
864dbfa3 1660Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 1661{
1662 union {
1663 long l;
ffed7fef 1664 char c[sizeof(long)];
a687059c
LW		 1665 } u;
1666
ffed7fef 1667#if BYTEORDER == 0x1234
a687059c
LW		 1668 u.c[0] = (l >> 24) & 255;
1669 u.c[1] = (l >> 16) & 255;
1670 u.c[2] = (l >> 8) & 255;
1671 u.c[3] = l & 255;
1672 return u.l;
1673#else
ffed7fef 1674#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1675 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1676#else
79072805
LW		 1677 register I32 o;
1678 register I32 s;
a687059c
LW		 1679
1680 u.l = l;
1681 l = 0;
ffed7fef
LW		 1682 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1683 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 1684 }
1685 return l;
1686#endif
1687#endif
1688}
1689
ffed7fef 1690#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 1691#endif /* MYSWAP */
1692
1693/*
1694 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1695 * If these functions are defined,
1696 * the BYTEORDER is neither 0x1234 nor 0x4321.
1697 * However, this is not assumed.
1698 * -DWS
1699 */
1700
1109a392 1701#define HTOLE(name,type) \
988174c1 1702 type \
ba106d47 1703 name (register type n) \
988174c1
LW		 1704 { \
1705 union { \
1706 type value; \
1707 char c[sizeof(type)]; \
1708 } u; \
79072805 1709 register I32 i; \
1109a392
MHM		 1710 register I32 s = 0; \
1711 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW		 1712 u.c[i] = (n >> s) & 0xFF; \
1713 } \
1714 return u.value; \
1715 }
1716
1109a392 1717#define LETOH(name,type) \
988174c1 1718 type \
ba106d47 1719 name (register type n) \
988174c1
LW		 1720 { \
1721 union { \
1722 type value; \
1723 char c[sizeof(type)]; \
1724 } u; \
79072805 1725 register I32 i; \
1109a392 1726 register I32 s = 0; \
988174c1
LW		 1727 u.value = n; \
1728 n = 0; \
1109a392
MHM		 1729 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1730 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW		 1731 } \
1732 return n; \
1733 }
1734
1109a392
MHM		 1735/*
1736 * Big-endian byte order functions.
1737 */
1738
1739#define HTOBE(name,type) \
1740 type \
1741 name (register type n) \
1742 { \
1743 union { \
1744 type value; \
1745 char c[sizeof(type)]; \
1746 } u; \
1747 register I32 i; \
1748 register I32 s = 8*(sizeof(u.c)-1); \
1749 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1750 u.c[i] = (n >> s) & 0xFF; \
1751 } \
1752 return u.value; \
1753 }
1754
1755#define BETOH(name,type) \
1756 type \
1757 name (register type n) \
1758 { \
1759 union { \
1760 type value; \
1761 char c[sizeof(type)]; \
1762 } u; \
1763 register I32 i; \
1764 register I32 s = 8*(sizeof(u.c)-1); \
1765 u.value = n; \
1766 n = 0; \
1767 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1768 n |= ((type)(u.c[i] & 0xFF)) << s; \
1769 } \
1770 return n; \
1771 }
1772
1773/*
1774 * If we just can't do it...
1775 */
1776
1777#define NOT_AVAIL(name,type) \
1778 type \
1779 name (register type n) \
1780 { \
1781 Perl_croak_nocontext(#name "() not available"); \
1782 return n; /* not reached */ \
1783 }
1784
1785
988174c1 1786#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 1787HTOLE(htovs,short)
988174c1
LW		 1788#endif
1789#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 1790HTOLE(htovl,long)
988174c1
LW		 1791#endif
1792#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 1793LETOH(vtohs,short)
988174c1
LW		 1794#endif
1795#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM		 1796LETOH(vtohl,long)
1797#endif
1798
1799#ifdef PERL_NEED_MY_HTOLE16
1800# if U16SIZE == 2
1801HTOLE(Perl_my_htole16,U16)
1802# else
1803NOT_AVAIL(Perl_my_htole16,U16)
1804# endif
1805#endif
1806#ifdef PERL_NEED_MY_LETOH16
1807# if U16SIZE == 2
1808LETOH(Perl_my_letoh16,U16)
1809# else
1810NOT_AVAIL(Perl_my_letoh16,U16)
1811# endif
1812#endif
1813#ifdef PERL_NEED_MY_HTOBE16
1814# if U16SIZE == 2
1815HTOBE(Perl_my_htobe16,U16)
1816# else
1817NOT_AVAIL(Perl_my_htobe16,U16)
1818# endif
1819#endif
1820#ifdef PERL_NEED_MY_BETOH16
1821# if U16SIZE == 2
1822BETOH(Perl_my_betoh16,U16)
1823# else
1824NOT_AVAIL(Perl_my_betoh16,U16)
1825# endif
1826#endif
1827
1828#ifdef PERL_NEED_MY_HTOLE32
1829# if U32SIZE == 4
1830HTOLE(Perl_my_htole32,U32)
1831# else
1832NOT_AVAIL(Perl_my_htole32,U32)
1833# endif
1834#endif
1835#ifdef PERL_NEED_MY_LETOH32
1836# if U32SIZE == 4
1837LETOH(Perl_my_letoh32,U32)
1838# else
1839NOT_AVAIL(Perl_my_letoh32,U32)
1840# endif
1841#endif
1842#ifdef PERL_NEED_MY_HTOBE32
1843# if U32SIZE == 4
1844HTOBE(Perl_my_htobe32,U32)
1845# else
1846NOT_AVAIL(Perl_my_htobe32,U32)
1847# endif
1848#endif
1849#ifdef PERL_NEED_MY_BETOH32
1850# if U32SIZE == 4
1851BETOH(Perl_my_betoh32,U32)
1852# else
1853NOT_AVAIL(Perl_my_betoh32,U32)
1854# endif
1855#endif
1856
1857#ifdef PERL_NEED_MY_HTOLE64
1858# if U64SIZE == 8
1859HTOLE(Perl_my_htole64,U64)
1860# else
1861NOT_AVAIL(Perl_my_htole64,U64)
1862# endif
1863#endif
1864#ifdef PERL_NEED_MY_LETOH64
1865# if U64SIZE == 8
1866LETOH(Perl_my_letoh64,U64)
1867# else
1868NOT_AVAIL(Perl_my_letoh64,U64)
1869# endif
1870#endif
1871#ifdef PERL_NEED_MY_HTOBE64
1872# if U64SIZE == 8
1873HTOBE(Perl_my_htobe64,U64)
1874# else
1875NOT_AVAIL(Perl_my_htobe64,U64)
1876# endif
1877#endif
1878#ifdef PERL_NEED_MY_BETOH64
1879# if U64SIZE == 8
1880BETOH(Perl_my_betoh64,U64)
1881# else
1882NOT_AVAIL(Perl_my_betoh64,U64)
1883# endif
988174c1 1884#endif
a687059c 1885
1109a392
MHM		 1886#ifdef PERL_NEED_MY_HTOLES
1887HTOLE(Perl_my_htoles,short)
1888#endif
1889#ifdef PERL_NEED_MY_LETOHS
1890LETOH(Perl_my_letohs,short)
1891#endif
1892#ifdef PERL_NEED_MY_HTOBES
1893HTOBE(Perl_my_htobes,short)
1894#endif
1895#ifdef PERL_NEED_MY_BETOHS
1896BETOH(Perl_my_betohs,short)
1897#endif
1898
1899#ifdef PERL_NEED_MY_HTOLEI
1900HTOLE(Perl_my_htolei,int)
1901#endif
1902#ifdef PERL_NEED_MY_LETOHI
1903LETOH(Perl_my_letohi,int)
1904#endif
1905#ifdef PERL_NEED_MY_HTOBEI
1906HTOBE(Perl_my_htobei,int)
1907#endif
1908#ifdef PERL_NEED_MY_BETOHI
1909BETOH(Perl_my_betohi,int)
1910#endif
1911
1912#ifdef PERL_NEED_MY_HTOLEL
1913HTOLE(Perl_my_htolel,long)
1914#endif
1915#ifdef PERL_NEED_MY_LETOHL
1916LETOH(Perl_my_letohl,long)
1917#endif
1918#ifdef PERL_NEED_MY_HTOBEL
1919HTOBE(Perl_my_htobel,long)
1920#endif
1921#ifdef PERL_NEED_MY_BETOHL
1922BETOH(Perl_my_betohl,long)
1923#endif
1924
1925void
1926Perl_my_swabn(void *ptr, int n)
1927{
1928 register char *s = (char *)ptr;
1929 register char *e = s + (n-1);
1930 register char tc;
1931
1932 for (n /= 2; n > 0; s++, e--, n--) {
1933 tc = *s;
1934 *s = *e;
1935 *e = tc;
1936 }
1937}
1938
4a7d1889
NIS		 1939PerlIO *
1940Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
1941{
2986a63f 1942#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
1f852d0d
NIS		 1943 int p[2];
1944 register I32 This, that;
1945 register Pid_t pid;
1946 SV *sv;
1947 I32 did_pipes = 0;
1948 int pp[2];
1949
1950 PERL_FLUSHALL_FOR_CHILD;
1951 This = (*mode == 'w');
1952 that = !This;
1953 if (PL_tainting) {
1954 taint_env();
1955 taint_proper("Insecure %s%s", "EXEC");
1956 }
1957 if (PerlProc_pipe(p) < 0)
1958 return Nullfp;
1959 /* Try for another pipe pair for error return */
1960 if (PerlProc_pipe(pp) >= 0)
1961 did_pipes = 1;
52e18b1f 1962 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS		 1963 if (errno != EAGAIN) {
1964 PerlLIO_close(p[This]);
4e6dfe71 1965 PerlLIO_close(p[that]);
1f852d0d
NIS		 1966 if (did_pipes) {
1967 PerlLIO_close(pp[0]);
1968 PerlLIO_close(pp[1]);
1969 }
1970 return Nullfp;
1971 }
1972 sleep(5);
1973 }
1974 if (pid == 0) {
1975 /* Child */
1f852d0d
NIS		 1976#undef THIS
1977#undef THAT
1978#define THIS that
1979#define THAT This
1f852d0d
NIS		 1980 /* Close parent's end of error status pipe (if any) */
1981 if (did_pipes) {
1982 PerlLIO_close(pp[0]);
1983#if defined(HAS_FCNTL) && defined(F_SETFD)
1984 /* Close error pipe automatically if exec works */
1985 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1986#endif
1987 }
1988 /* Now dup our end of _the_ pipe to right position */
1989 if (p[THIS] != (*mode == 'r')) {
1990 PerlLIO_dup2(p[THIS], *mode == 'r');
1991 PerlLIO_close(p[THIS]);
4e6dfe71
GS		 1992 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
1993 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 1994 }
4e6dfe71
GS		 1995 else
1996 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS		 1997#if !defined(HAS_FCNTL) || !defined(F_SETFD)
1998 /* No automatic close - do it by hand */
b7953727
JH		 1999# ifndef NOFILE
2000# define NOFILE 20
2001# endif
a080fe3d
NIS		 2002 {
2003 int fd;
2004
2005 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2006 if (fd != pp[1])
a080fe3d
NIS		 2007 PerlLIO_close(fd);
2008 }
1f852d0d
NIS		 2009 }
2010#endif
2011 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
2012 PerlProc__exit(1);
2013#undef THIS
2014#undef THAT
2015 }
2016 /* Parent */
52e18b1f 2017 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS		 2018 if (did_pipes)
2019 PerlLIO_close(pp[1]);
2020 /* Keep the lower of the two fd numbers */
2021 if (p[that] < p[This]) {
2022 PerlLIO_dup2(p[This], p[that]);
2023 PerlLIO_close(p[This]);
2024 p[This] = p[that];
2025 }
4e6dfe71
GS		 2026 else
2027 PerlLIO_close(p[that]); /* close child's end of pipe */
2028
1f852d0d
NIS		 2029 LOCK_FDPID_MUTEX;
2030 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2031 UNLOCK_FDPID_MUTEX;
862a34c6 2032 SvUPGRADE(sv,SVt_IV);
45977657 2033 SvIV_set(sv, pid);
1f852d0d
NIS		 2034 PL_forkprocess = pid;
2035 /* If we managed to get status pipe check for exec fail */
2036 if (did_pipes && pid > 0) {
2037 int errkid;
2038 int n = 0, n1;
2039
2040 while (n < sizeof(int)) {
2041 n1 = PerlLIO_read(pp[0],
2042 (void*)(((char*)&errkid)+n),
2043 (sizeof(int)) - n);
2044 if (n1 <= 0)
2045 break;
2046 n += n1;
2047 }
2048 PerlLIO_close(pp[0]);
2049 did_pipes = 0;
2050 if (n) { /* Error */
2051 int pid2, status;
8c51524e 2052 PerlLIO_close(p[This]);
1f852d0d
NIS		 2053 if (n != sizeof(int))
2054 Perl_croak(aTHX_ "panic: kid popen errno read");
2055 do {
2056 pid2 = wait4pid(pid, &status, 0);
2057 } while (pid2 == -1 && errno == EINTR);
2058 errno = errkid; /* Propagate errno from kid */
2059 return Nullfp;
2060 }
2061 }
2062 if (did_pipes)
2063 PerlLIO_close(pp[0]);
2064 return PerlIO_fdopen(p[This], mode);
2065#else
4a7d1889
NIS		 2066 Perl_croak(aTHX_ "List form of piped open not implemented");
2067 return (PerlIO *) NULL;
1f852d0d 2068#endif
4a7d1889
NIS		 2069}
2070
5f05dabc 2071 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 2072#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 2073PerlIO *
864dbfa3 2074Perl_my_popen(pTHX_ char *cmd, char *mode)
a687059c
LW		 2075{
2076 int p[2];
8ac85365 2077 register I32 This, that;
d8a83dd3 2078 register Pid_t pid;
79072805 2079 SV *sv;
770526c1 2080 I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ		 2081 I32 did_pipes = 0;
2082 int pp[2];
a687059c 2083
45bc9206 2084 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2085#ifdef OS2
2086 if (doexec) {
23da6c43 2087 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2088 }
a1d180c4 2089#endif
8ac85365
NIS		 2090 This = (*mode == 'w');
2091 that = !This;
3280af22 2092 if (doexec && PL_tainting) {
bbce6d69 2093 taint_env();
2094 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2095 }
c2267164
IZ		 2096 if (PerlProc_pipe(p) < 0)
2097 return Nullfp;
e446cec8
IZ		 2098 if (doexec && PerlProc_pipe(pp) >= 0)
2099 did_pipes = 1;
52e18b1f 2100 while ((pid = PerlProc_fork()) < 0) {
a687059c 2101 if (errno != EAGAIN) {
6ad3d225 2102 PerlLIO_close(p[This]);
b5ac89c3 2103 PerlLIO_close(p[that]);
e446cec8
IZ		 2104 if (did_pipes) {
2105 PerlLIO_close(pp[0]);
2106 PerlLIO_close(pp[1]);
2107 }
a687059c 2108 if (!doexec)
cea2e8a9 2109 Perl_croak(aTHX_ "Can't fork");
a687059c
LW		 2110 return Nullfp;
2111 }
2112 sleep(5);
2113 }
2114 if (pid == 0) {
79072805
LW		 2115 GV* tmpgv;
2116
30ac6d9b
GS		 2117#undef THIS
2118#undef THAT
a687059c 2119#define THIS that
8ac85365 2120#define THAT This
e446cec8
IZ		 2121 if (did_pipes) {
2122 PerlLIO_close(pp[0]);
2123#if defined(HAS_FCNTL) && defined(F_SETFD)
2124 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2125#endif
2126 }
a687059c 2127 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2128 PerlLIO_dup2(p[THIS], *mode == 'r');
2129 PerlLIO_close(p[THIS]);
b5ac89c3
NIS		 2130 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2131 PerlLIO_close(p[THAT]);
a687059c 2132 }
b5ac89c3
NIS		 2133 else
2134 PerlLIO_close(p[THAT]);
4435c477 2135#ifndef OS2
a687059c 2136 if (doexec) {
a0d0e21e 2137#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2138#ifndef NOFILE
2139#define NOFILE 20
2140#endif
a080fe3d 2141 {
3aed30dc 2142 int fd;
a080fe3d
NIS		 2143
2144 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2145 if (fd != pp[1])
3aed30dc 2146 PerlLIO_close(fd);
a080fe3d 2147 }
ae986130 2148#endif
a080fe3d
NIS		 2149 /* may or may not use the shell */
2150 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2151 PerlProc__exit(1);
a687059c 2152 }
4435c477 2153#endif /* defined OS2 */
de3bb511 2154 /*SUPPRESS 560*/
306196c3 2155 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4d76a344 2156 SvREADONLY_off(GvSV(tmpgv));
7766f137 2157 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS		 2158 SvREADONLY_on(GvSV(tmpgv));
2159 }
2160#ifdef THREADS_HAVE_PIDS
2161 PL_ppid = (IV)getppid();
2162#endif
3280af22
NIS		 2163 PL_forkprocess = 0;
2164 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW		 2165 return Nullfp;
2166#undef THIS
2167#undef THAT
2168 }
b5ac89c3 2169 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ		 2170 if (did_pipes)
2171 PerlLIO_close(pp[1]);
8ac85365 2172 if (p[that] < p[This]) {
6ad3d225
GS		 2173 PerlLIO_dup2(p[This], p[that]);
2174 PerlLIO_close(p[This]);
8ac85365 2175 p[This] = p[that];
62b28dd9 2176 }
b5ac89c3
NIS		 2177 else
2178 PerlLIO_close(p[that]);
2179
4755096e 2180 LOCK_FDPID_MUTEX;
3280af22 2181 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2182 UNLOCK_FDPID_MUTEX;
862a34c6 2183 SvUPGRADE(sv,SVt_IV);
45977657 2184 SvIV_set(sv, pid);
3280af22 2185 PL_forkprocess = pid;
e446cec8
IZ		 2186 if (did_pipes && pid > 0) {
2187 int errkid;
2188 int n = 0, n1;
2189
2190 while (n < sizeof(int)) {
2191 n1 = PerlLIO_read(pp[0],
2192 (void*)(((char*)&errkid)+n),
2193 (sizeof(int)) - n);
2194 if (n1 <= 0)
2195 break;
2196 n += n1;
2197 }
2f96c702
IZ		 2198 PerlLIO_close(pp[0]);
2199 did_pipes = 0;
e446cec8 2200 if (n) { /* Error */
faa466a7 2201 int pid2, status;
8c51524e 2202 PerlLIO_close(p[This]);
e446cec8 2203 if (n != sizeof(int))
cea2e8a9 2204 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG		 2205 do {
2206 pid2 = wait4pid(pid, &status, 0);
2207 } while (pid2 == -1 && errno == EINTR);
e446cec8
IZ		 2208 errno = errkid; /* Propagate errno from kid */
2209 return Nullfp;
2210 }
2211 }
2212 if (did_pipes)
2213 PerlLIO_close(pp[0]);
8ac85365 2214 return PerlIO_fdopen(p[This], mode);
a687059c 2215}
7c0587c8 2216#else
85ca448a 2217#if defined(atarist) || defined(EPOC)
7c0587c8 2218FILE *popen();
760ac839 2219PerlIO *
864dbfa3 2220Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2221{
45bc9206 2222 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS		 2223 /* Call system's popen() to get a FILE *, then import it.
2224 used 0 for 2nd parameter to PerlIO_importFILE;
2225 apparently not used
2226 */
2227 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2228}
2b96b0a5
JH		 2229#else
2230#if defined(DJGPP)
2231FILE *djgpp_popen();
2232PerlIO *
2233Perl_my_popen(pTHX_ char *cmd, char *mode)
2234{
2235 PERL_FLUSHALL_FOR_CHILD;
2236 /* Call system's popen() to get a FILE *, then import it.
2237 used 0 for 2nd parameter to PerlIO_importFILE;
2238 apparently not used
2239 */
2240 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2241}
2242#endif
7c0587c8
LW		 2243#endif
2244
2245#endif /* !DOSISH */
a687059c 2246
52e18b1f
GS		 2247/* this is called in parent before the fork() */
2248void
2249Perl_atfork_lock(void)
2250{
27da23d5 2251 dVAR;
3db8f154 2252#if defined(USE_ITHREADS)
52e18b1f
GS		 2253 /* locks must be held in locking order (if any) */
2254# ifdef MYMALLOC
2255 MUTEX_LOCK(&PL_malloc_mutex);
2256# endif
2257 OP_REFCNT_LOCK;
2258#endif
2259}
2260
2261/* this is called in both parent and child after the fork() */
2262void
2263Perl_atfork_unlock(void)
2264{
27da23d5 2265 dVAR;
3db8f154 2266#if defined(USE_ITHREADS)
52e18b1f
GS		 2267 /* locks must be released in same order as in atfork_lock() */
2268# ifdef MYMALLOC
2269 MUTEX_UNLOCK(&PL_malloc_mutex);
2270# endif
2271 OP_REFCNT_UNLOCK;
2272#endif
2273}
2274
2275Pid_t
2276Perl_my_fork(void)
2277{
2278#if defined(HAS_FORK)
2279 Pid_t pid;
3db8f154 2280#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS		 2281 atfork_lock();
2282 pid = fork();
2283 atfork_unlock();
2284#else
2285 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2286 * handlers elsewhere in the code */
2287 pid = fork();
2288#endif
2289 return pid;
2290#else
2291 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2292 Perl_croak_nocontext("fork() not available");
b961a566 2293 return 0;
52e18b1f
GS		 2294#endif /* HAS_FORK */
2295}
2296
748a9306 2297#ifdef DUMP_FDS
35ff7856 2298void
864dbfa3 2299Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2300{
2301 int fd;
c623ac67 2302 Stat_t tmpstatbuf;
ae986130 2303
bf49b057 2304 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2305 for (fd = 0; fd < 32; fd++) {
6ad3d225 2306 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2307 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2308 }
bf49b057 2309 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2310 return;
ae986130 2311}
35ff7856 2312#endif /* DUMP_FDS */
ae986130 2313
fe14fcc3 2314#ifndef HAS_DUP2
fec02dd3 2315int
ba106d47 2316dup2(int oldfd, int newfd)
a687059c 2317{
a0d0e21e 2318#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2319 if (oldfd == newfd)
2320 return oldfd;
6ad3d225 2321 PerlLIO_close(newfd);
fec02dd3 2322 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2323#else
fc36a67e 2324#define DUP2_MAX_FDS 256
2325 int fdtmp[DUP2_MAX_FDS];
79072805 2326 I32 fdx = 0;
ae986130
LW		 2327 int fd;
2328
fe14fcc3 2329 if (oldfd == newfd)
fec02dd3 2330 return oldfd;
6ad3d225 2331 PerlLIO_close(newfd);
fc36a67e 2332 /* good enough for low fd's... */
6ad3d225 2333 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2334 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2335 PerlLIO_close(fd);
fc36a67e 2336 fd = -1;
2337 break;
2338 }
ae986130 2339 fdtmp[fdx++] = fd;
fc36a67e 2340 }
ae986130 2341 while (fdx > 0)
6ad3d225 2342 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2343 return fd;
62b28dd9 2344#endif
a687059c
LW		 2345}
2346#endif
2347
64ca3a65 2348#ifndef PERL_MICRO
ff68c719 2349#ifdef HAS_SIGACTION
2350
abea2c45
HS		 2351#ifdef MACOS_TRADITIONAL
2352/* We don't want restart behavior on MacOS */
2353#undef SA_RESTART
2354#endif
2355
ff68c719 2356Sighandler_t
864dbfa3 2357Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2358{
27da23d5 2359 dVAR;
ff68c719 2360 struct sigaction act, oact;
2361
a10b1e10
JH		 2362#ifdef USE_ITHREADS
2363 /* only "parent" interpreter can diddle signals */
2364 if (PL_curinterp != aTHX)
2365 return SIG_ERR;
2366#endif
2367
ff68c719 2368 act.sa_handler = handler;
2369 sigemptyset(&act.sa_mask);
2370 act.sa_flags = 0;
2371#ifdef SA_RESTART
4ffa73a3
JH		 2372 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2373 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2374#endif
358837b8 2375#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
85264bed
CS		 2376 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2377 act.sa_flags |= SA_NOCLDWAIT;
2378#endif
ff68c719 2379 if (sigaction(signo, &act, &oact) == -1)
36477c24 2380 return SIG_ERR;
ff68c719 2381 else
36477c24 2382 return oact.sa_handler;
ff68c719 2383}
2384
2385Sighandler_t
864dbfa3 2386Perl_rsignal_state(pTHX_ int signo)
ff68c719 2387{
2388 struct sigaction oact;
2389
2390 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
3aed30dc 2391 return SIG_ERR;
ff68c719 2392 else
3aed30dc 2393 return oact.sa_handler;
ff68c719 2394}
2395
2396int
864dbfa3 2397Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2398{
27da23d5 2399 dVAR;
ff68c719 2400 struct sigaction act;
2401
a10b1e10
JH		 2402#ifdef USE_ITHREADS
2403 /* only "parent" interpreter can diddle signals */
2404 if (PL_curinterp != aTHX)
2405 return -1;
2406#endif
2407
ff68c719 2408 act.sa_handler = handler;
2409 sigemptyset(&act.sa_mask);
2410 act.sa_flags = 0;
2411#ifdef SA_RESTART
4ffa73a3
JH		 2412 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2413 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2414#endif
36b5d377 2415#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
85264bed
CS		 2416 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2417 act.sa_flags |= SA_NOCLDWAIT;
2418#endif
ff68c719 2419 return sigaction(signo, &act, save);
2420}
2421
2422int
864dbfa3 2423Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2424{
27da23d5 2425 dVAR;
a10b1e10
JH		 2426#ifdef USE_ITHREADS
2427 /* only "parent" interpreter can diddle signals */
2428 if (PL_curinterp != aTHX)
2429 return -1;
2430#endif
2431
ff68c719 2432 return sigaction(signo, save, (struct sigaction *)NULL);
2433}
2434
2435#else /* !HAS_SIGACTION */
2436
2437Sighandler_t
864dbfa3 2438Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2439{
39f1703b 2440#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2441 /* only "parent" interpreter can diddle signals */
2442 if (PL_curinterp != aTHX)
2443 return SIG_ERR;
2444#endif
2445
6ad3d225 2446 return PerlProc_signal(signo, handler);
ff68c719 2447}
2448
ff68c719 2449static
2450Signal_t
4e35701f 2451sig_trap(int signo)
ff68c719 2452{
27da23d5
JH		 2453 dVAR;
2454 PL_sig_trapped++;
ff68c719 2455}
2456
2457Sighandler_t
864dbfa3 2458Perl_rsignal_state(pTHX_ int signo)
ff68c719 2459{
27da23d5 2460 dVAR;
ff68c719 2461 Sighandler_t oldsig;
2462
39f1703b 2463#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2464 /* only "parent" interpreter can diddle signals */
2465 if (PL_curinterp != aTHX)
2466 return SIG_ERR;
2467#endif
2468
27da23d5 2469 PL_sig_trapped = 0;
6ad3d225
GS		 2470 oldsig = PerlProc_signal(signo, sig_trap);
2471 PerlProc_signal(signo, oldsig);
27da23d5 2472 if (PL_sig_trapped)
3aed30dc 2473 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719 2474 return oldsig;
2475}
2476
2477int
864dbfa3 2478Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2479{
39f1703b 2480#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2481 /* only "parent" interpreter can diddle signals */
2482 if (PL_curinterp != aTHX)
2483 return -1;
2484#endif
6ad3d225 2485 *save = PerlProc_signal(signo, handler);
ff68c719 2486 return (*save == SIG_ERR) ? -1 : 0;
2487}
2488
2489int
864dbfa3 2490Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2491{
39f1703b 2492#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2493 /* only "parent" interpreter can diddle signals */
2494 if (PL_curinterp != aTHX)
2495 return -1;
2496#endif
6ad3d225 2497 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
ff68c719 2498}
2499
2500#endif /* !HAS_SIGACTION */
64ca3a65 2501#endif /* !PERL_MICRO */
ff68c719 2502
5f05dabc 2503 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2504#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2505I32
864dbfa3 2506Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2507{
ff68c719 2508 Sigsave_t hstat, istat, qstat;
a687059c 2509 int status;
a0d0e21e 2510 SV **svp;
d8a83dd3
JH		 2511 Pid_t pid;
2512 Pid_t pid2;
03136e13 2513 bool close_failed;
b7953727 2514 int saved_errno = 0;
22fae026
TM		 2515#ifdef WIN32
2516 int saved_win32_errno;
2517#endif
a687059c 2518
4755096e 2519 LOCK_FDPID_MUTEX;
3280af22 2520 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2521 UNLOCK_FDPID_MUTEX;
25d92023 2522 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2523 SvREFCNT_dec(*svp);
3280af22 2524 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2525#ifdef OS2
2526 if (pid == -1) { /* Opened by popen. */
2527 return my_syspclose(ptr);
2528 }
a1d180c4 2529#endif
03136e13
CS		 2530 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2531 saved_errno = errno;
22fae026
TM		 2532#ifdef WIN32
2533 saved_win32_errno = GetLastError();
2534#endif
03136e13 2535 }
7c0587c8 2536#ifdef UTS
6ad3d225 2537 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2538#endif
64ca3a65 2539#ifndef PERL_MICRO
ff68c719 2540 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2541 rsignal_save(SIGINT, SIG_IGN, &istat);
2542 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
64ca3a65 2543#endif
748a9306 2544 do {
1d3434b8
GS		 2545 pid2 = wait4pid(pid, &status, 0);
2546 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2547#ifndef PERL_MICRO
ff68c719 2548 rsignal_restore(SIGHUP, &hstat);
2549 rsignal_restore(SIGINT, &istat);
2550 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2551#endif
03136e13 2552 if (close_failed) {
ce6e1103 2553 SETERRNO(saved_errno, 0);
03136e13
CS		 2554 return -1;
2555 }
1d3434b8 2556 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2557}
4633a7c4
LW		 2558#endif /* !DOSISH */
2559
2986a63f 2560#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
79072805 2561I32
d8a83dd3 2562Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2563{
27da23d5 2564 I32 result = 0;
b7953727
JH		 2565 if (!pid)
2566 return -1;
2567#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2568 {
cf28e18a 2569 char spid[TYPE_CHARS(IV)];
20188a90 2570
3aed30dc 2571 if (pid > 0) {
27da23d5 2572 SV** svp;
7b0972df 2573 sprintf(spid, "%"IVdf, (IV)pid);
3aed30dc
HS		 2574 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2575 if (svp && *svp != &PL_sv_undef) {
2576 *statusp = SvIVX(*svp);
2577 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2578 return pid;
2579 }
2580 }
2581 else {
2582 HE *entry;
2583
2584 hv_iterinit(PL_pidstatus);
2585 if ((entry = hv_iternext(PL_pidstatus))) {
27da23d5
JH		 2586 SV *sv = hv_iterval(PL_pidstatus,entry);
2587
3aed30dc 2588 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3aed30dc
HS		 2589 *statusp = SvIVX(sv);
2590 sprintf(spid, "%"IVdf, (IV)pid);
2591 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2592 return pid;
2593 }
20188a90
LW		 2594 }
2595 }
68a29c53 2596#endif
79072805 2597#ifdef HAS_WAITPID
367f3c24
IZ		 2598# ifdef HAS_WAITPID_RUNTIME
2599 if (!HAS_WAITPID_RUNTIME)
2600 goto hard_way;
2601# endif
cddd4526 2602 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2603 goto finish;
367f3c24
IZ		 2604#endif
2605#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
cddd4526 2606 result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
dfcfdb64 2607 goto finish;
367f3c24
IZ		 2608#endif
2609#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
27da23d5 2610#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2611 hard_way:
27da23d5 2612#endif
a0d0e21e 2613 {
a0d0e21e 2614 if (flags)
cea2e8a9 2615 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2616 else {
76e3520e 2617 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2618 pidgone(result,*statusp);
2619 if (result < 0)
2620 *statusp = -1;
2621 }
a687059c
LW		 2622 }
2623#endif
27da23d5 2624#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 2625 finish:
27da23d5 2626#endif
cddd4526
NIS		 2627 if (result < 0 && errno == EINTR) {
2628 PERL_ASYNC_CHECK();
2629 }
2630 return result;
a687059c 2631}
2986a63f 2632#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2633
7c0587c8 2634void
de3bb511 2635/*SUPPRESS 590*/
d8a83dd3 2636Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2637{
79072805 2638 register SV *sv;
cf28e18a 2639 char spid[TYPE_CHARS(IV)];
a687059c 2640
7b0972df 2641 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2642 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
862a34c6 2643 SvUPGRADE(sv,SVt_IV);
45977657 2644 SvIV_set(sv, status);
20188a90 2645 return;
a687059c
LW		 2646}
2647
85ca448a 2648#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 2649int pclose();
ddcf38b7
IZ		 2650#ifdef HAS_FORK
2651int /* Cannot prototype with I32
2652 in os2ish.h. */
ba106d47 2653my_syspclose(PerlIO *ptr)
ddcf38b7 2654#else
79072805 2655I32
864dbfa3 2656Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2657#endif
a687059c 2658{
760ac839
LW		 2659 /* Needs work for PerlIO ! */
2660 FILE *f = PerlIO_findFILE(ptr);
2661 I32 result = pclose(f);
2b96b0a5
JH		 2662 PerlIO_releaseFILE(ptr,f);
2663 return result;
2664}
2665#endif
2666
933fea7f 2667#if defined(DJGPP)
2b96b0a5
JH		 2668int djgpp_pclose();
2669I32
2670Perl_my_pclose(pTHX_ PerlIO *ptr)
2671{
2672 /* Needs work for PerlIO ! */
2673 FILE *f = PerlIO_findFILE(ptr);
2674 I32 result = djgpp_pclose(f);
933fea7f 2675 result = (result << 8) & 0xff00;
760ac839
LW		 2676 PerlIO_releaseFILE(ptr,f);
2677 return result;
a687059c 2678}
7c0587c8 2679#endif
9f68db38
LW		 2680
2681void
864dbfa3 2682Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2683{
79072805 2684 register I32 todo;
08105a92 2685 register const char *frombase = from;
9f68db38
LW		 2686
2687 if (len == 1) {
08105a92 2688 register const char c = *from;
9f68db38 2689 while (count-- > 0)
5926133d 2690 *to++ = c;
9f68db38
LW		 2691 return;
2692 }
2693 while (count-- > 0) {
2694 for (todo = len; todo > 0; todo--) {
2695 *to++ = *from++;
2696 }
2697 from = frombase;
2698 }
2699}
0f85fab0 2700
fe14fcc3 2701#ifndef HAS_RENAME
79072805 2702I32
4373e329 2703Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 2704{
93a17b20
LW		 2705 char *fa = strrchr(a,'/');
2706 char *fb = strrchr(b,'/');
c623ac67
GS		 2707 Stat_t tmpstatbuf1;
2708 Stat_t tmpstatbuf2;
46fc3d4c 2709 SV *tmpsv = sv_newmortal();
62b28dd9
LW		 2710
2711 if (fa)
2712 fa++;
2713 else
2714 fa = a;
2715 if (fb)
2716 fb++;
2717 else
2718 fb = b;
2719 if (strNE(a,b))
2720 return FALSE;
2721 if (fa == a)
616d8c9c 2722 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2723 else
46fc3d4c 2724 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 2725 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 2726 return FALSE;
2727 if (fb == b)
616d8c9c 2728 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2729 else
46fc3d4c 2730 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 2731 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 2732 return FALSE;
2733 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2734 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2735}
fe14fcc3
LW		 2736#endif /* !HAS_RENAME */
2737
491527d0 2738char*
e1ec3a88 2739Perl_find_script(pTHX_ const char *scriptname, bool dosearch, const char **search_ext, I32 flags)
491527d0 2740{
e1ec3a88 2741 const char *xfound = Nullch;
491527d0 2742 char *xfailed = Nullch;
0f31cffe 2743 char tmpbuf[MAXPATHLEN];
491527d0 2744 register char *s;
5f74f29c 2745 I32 len = 0;
491527d0
GS		 2746 int retval;
2747#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2748# define SEARCH_EXTS ".bat", ".cmd", NULL
2749# define MAX_EXT_LEN 4
2750#endif
2751#ifdef OS2
2752# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2753# define MAX_EXT_LEN 4
2754#endif
2755#ifdef VMS
2756# define SEARCH_EXTS ".pl", ".com", NULL
2757# define MAX_EXT_LEN 4
2758#endif
2759 /* additional extensions to try in each dir if scriptname not found */
2760#ifdef SEARCH_EXTS
e1ec3a88
AL		 2761 const char *exts[] = { SEARCH_EXTS };
2762 const char **ext = search_ext ? search_ext : exts;
491527d0 2763 int extidx = 0, i = 0;
e1ec3a88 2764 const char *curext = Nullch;
491527d0 2765#else
73d840c0 2766 (void)search_ext;
491527d0
GS		 2767# define MAX_EXT_LEN 0
2768#endif
2769
2770 /*
2771 * If dosearch is true and if scriptname does not contain path
2772 * delimiters, search the PATH for scriptname.
2773 *
2774 * If SEARCH_EXTS is also defined, will look for each
2775 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2776 * while searching the PATH.
2777 *
2778 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2779 * proceeds as follows:
2780 * If DOSISH or VMSISH:
2781 * + look for ./scriptname{,.foo,.bar}
2782 * + search the PATH for scriptname{,.foo,.bar}
2783 *
2784 * If !DOSISH:
2785 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2786 * this will not look in '.' if it's not in the PATH)
2787 */
84486fc6 2788 tmpbuf[0] = '\0';
491527d0
GS		 2789
2790#ifdef VMS
2791# ifdef ALWAYS_DEFTYPES
2792 len = strlen(scriptname);
2793 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2794 int hasdir, idx = 0, deftypes = 1;
2795 bool seen_dot = 1;
2796
2797 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2798# else
2799 if (dosearch) {
2800 int hasdir, idx = 0, deftypes = 1;
2801 bool seen_dot = 1;
2802
2803 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2804# endif
2805 /* The first time through, just add SEARCH_EXTS to whatever we
2806 * already have, so we can check for default file types. */
2807 while (deftypes ||
84486fc6 2808 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 2809 {
2810 if (deftypes) {
2811 deftypes = 0;
84486fc6 2812 *tmpbuf = '\0';
491527d0 2813 }
84486fc6
GS		 2814 if ((strlen(tmpbuf) + strlen(scriptname)
2815 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2816 continue; /* don't search dir with too-long name */
84486fc6 2817 strcat(tmpbuf, scriptname);
491527d0
GS		 2818#else /* !VMS */
2819
2820#ifdef DOSISH
2821 if (strEQ(scriptname, "-"))
2822 dosearch = 0;
2823 if (dosearch) { /* Look in '.' first. */
fe2774ed 2824 const char *cur = scriptname;
491527d0
GS		 2825#ifdef SEARCH_EXTS
2826 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2827 while (ext[i])
2828 if (strEQ(ext[i++],curext)) {
2829 extidx = -1; /* already has an ext */
2830 break;
2831 }
2832 do {
2833#endif
2834 DEBUG_p(PerlIO_printf(Perl_debug_log,
2835 "Looking for %s\n",cur));
017f25f1
IZ		 2836 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2837 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 2838 dosearch = 0;
2839 scriptname = cur;
2840#ifdef SEARCH_EXTS
2841 break;
2842#endif
2843 }
2844#ifdef SEARCH_EXTS
2845 if (cur == scriptname) {
2846 len = strlen(scriptname);
84486fc6 2847 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2848 break;
84486fc6 2849 cur = strcpy(tmpbuf, scriptname);
491527d0
GS		 2850 }
2851 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2852 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS		 2853#endif
2854 }
2855#endif
2856
cd39f2b6
JH		 2857#ifdef MACOS_TRADITIONAL
2858 if (dosearch && !strchr(scriptname, ':') &&
2859 (s = PerlEnv_getenv("Commands")))
2860#else
491527d0
GS		 2861 if (dosearch && !strchr(scriptname, '/')
2862#ifdef DOSISH
2863 && !strchr(scriptname, '\\')
2864#endif
cd39f2b6
JH		 2865 && (s = PerlEnv_getenv("PATH")))
2866#endif
2867 {
491527d0 2868 bool seen_dot = 0;
92f0c265 2869
3280af22
NIS		 2870 PL_bufend = s + strlen(s);
2871 while (s < PL_bufend) {
cd39f2b6
JH		 2872#ifdef MACOS_TRADITIONAL
2873 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2874 ',',
2875 &len);
2876#else
491527d0
GS		 2877#if defined(atarist) || defined(DOSISH)
2878 for (len = 0; *s
2879# ifdef atarist
2880 && *s != ','
2881# endif
2882 && *s != ';'; len++, s++) {
84486fc6
GS		 2883 if (len < sizeof tmpbuf)
2884 tmpbuf[len] = *s;
491527d0 2885 }
84486fc6
GS		 2886 if (len < sizeof tmpbuf)
2887 tmpbuf[len] = '\0';
491527d0 2888#else /* ! (atarist || DOSISH) */
3280af22 2889 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 2890 ':',
2891 &len);
2892#endif /* ! (atarist || DOSISH) */
cd39f2b6 2893#endif /* MACOS_TRADITIONAL */
3280af22 2894 if (s < PL_bufend)
491527d0 2895 s++;
84486fc6 2896 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 2897 continue; /* don't search dir with too-long name */
cd39f2b6
JH		 2898#ifdef MACOS_TRADITIONAL
2899 if (len && tmpbuf[len - 1] != ':')
2900 tmpbuf[len++] = ':';
2901#else
491527d0 2902 if (len
61ae2fbf 2903#if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 2904 && tmpbuf[len - 1] != '/'
2905 && tmpbuf[len - 1] != '\\'
491527d0
GS		 2906#endif
2907 )
84486fc6
GS		 2908 tmpbuf[len++] = '/';
2909 if (len == 2 && tmpbuf[0] == '.')
491527d0 2910 seen_dot = 1;
cd39f2b6 2911#endif
84486fc6 2912 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS		 2913#endif /* !VMS */
2914
2915#ifdef SEARCH_EXTS
84486fc6 2916 len = strlen(tmpbuf);
491527d0
GS		 2917 if (extidx > 0) /* reset after previous loop */
2918 extidx = 0;
2919 do {
2920#endif
84486fc6 2921 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 2922 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 2923 if (S_ISDIR(PL_statbuf.st_mode)) {
2924 retval = -1;
2925 }
491527d0
GS		 2926#ifdef SEARCH_EXTS
2927 } while ( retval < 0 /* not there */
2928 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 2929 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS		 2930 );
2931#endif
2932 if (retval < 0)
2933 continue;
3280af22
NIS		 2934 if (S_ISREG(PL_statbuf.st_mode)
2935 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 2936#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 2937 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 2938#endif
2939 )
2940 {
3aed30dc 2941 xfound = tmpbuf; /* bingo! */
491527d0
GS		 2942 break;
2943 }
2944 if (!xfailed)
84486fc6 2945 xfailed = savepv(tmpbuf);
491527d0
GS		 2946 }
2947#ifndef DOSISH
017f25f1 2948 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 2949 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 2950 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 2951#endif
2952 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 2953 if (!xfound) {
2954 if (flags & 1) { /* do or die? */
3aed30dc 2955 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 2956 (xfailed ? "execute" : "find"),
2957 (xfailed ? xfailed : scriptname),
2958 (xfailed ? "" : " on PATH"),
2959 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2960 }
2961 scriptname = Nullch;
2962 }
491527d0
GS		 2963 if (xfailed)
2964 Safefree(xfailed);
2965 scriptname = xfound;
2966 }
9ccb31f9 2967 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS		 2968}
2969
ba869deb
GS		 2970#ifndef PERL_GET_CONTEXT_DEFINED
2971
2972void *
2973Perl_get_context(void)
2974{
27da23d5 2975 dVAR;
3db8f154 2976#if defined(USE_ITHREADS)
ba869deb
GS		 2977# ifdef OLD_PTHREADS_API
2978 pthread_addr_t t;
2979 if (pthread_getspecific(PL_thr_key, &t))
2980 Perl_croak_nocontext("panic: pthread_getspecific");
2981 return (void*)t;
2982# else
bce813aa 2983# ifdef I_MACH_CTHREADS
8b8b35ab 2984 return (void*)cthread_data(cthread_self());
bce813aa 2985# else
8b8b35ab
JH		 2986 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
2987# endif
c44d3fdb 2988# endif
ba869deb
GS		 2989#else
2990 return (void*)NULL;
2991#endif
2992}
2993
2994void
2995Perl_set_context(void *t)
2996{
27da23d5 2997 dVAR;
3db8f154 2998#if defined(USE_ITHREADS)
c44d3fdb
GS		 2999# ifdef I_MACH_CTHREADS
3000 cthread_set_data(cthread_self(), t);
3001# else
ba869deb
GS		 3002 if (pthread_setspecific(PL_thr_key, t))
3003 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3004# endif
b464bac0
AL		 3005#else
3006 (void)t;
ba869deb
GS		 3007#endif
3008}
3009
3010#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3011
27da23d5 3012#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3013struct perl_vars *
864dbfa3 3014Perl_GetVars(pTHX)
22239a37 3015{
533c011a 3016 return &PL_Vars;
22239a37 3017}
31fb1209
NIS		 3018#endif
3019
1cb0ed9b 3020char **
864dbfa3 3021Perl_get_op_names(pTHX)
31fb1209 3022{
27da23d5 3023 return (char **)PL_op_name;
31fb1209
NIS		 3024}
3025
1cb0ed9b 3026char **
864dbfa3 3027Perl_get_op_descs(pTHX)
31fb1209 3028{
27da23d5 3029 return (char **)PL_op_desc;
31fb1209 3030}
9e6b2b00 3031
e1ec3a88 3032const char *
864dbfa3 3033Perl_get_no_modify(pTHX)
9e6b2b00 3034{
e1ec3a88 3035 return PL_no_modify;
9e6b2b00
GS		 3036}
3037
3038U32 *
864dbfa3 3039Perl_get_opargs(pTHX)
9e6b2b00 3040{
27da23d5 3041 return (U32 *)PL_opargs;
9e6b2b00 3042}
51aa15f3 3043
0cb96387
GS		 3044PPADDR_t*
3045Perl_get_ppaddr(pTHX)
3046{
27da23d5 3047 dVAR;
12ae5dfc 3048 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS		 3049}
3050
a6c40364
GS		 3051#ifndef HAS_GETENV_LEN
3052char *
bf4acbe4 3053Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364
GS		 3054{
3055 char *env_trans = PerlEnv_getenv(env_elem);
3056 if (env_trans)
3057 *len = strlen(env_trans);
3058 return env_trans;
f675dbe5
CB		 3059}
3060#endif
3061
dc9e4912
GS		 3062
3063MGVTBL*
864dbfa3 3064Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3065{
27da23d5 3066 const MGVTBL* result = Null(MGVTBL*);
dc9e4912
GS		 3067
3068 switch(vtbl_id) {
3069 case want_vtbl_sv:
3070 result = &PL_vtbl_sv;
3071 break;
3072 case want_vtbl_env:
3073 result = &PL_vtbl_env;
3074 break;
3075 case want_vtbl_envelem:
3076 result = &PL_vtbl_envelem;
3077 break;
3078 case want_vtbl_sig:
3079 result = &PL_vtbl_sig;
3080 break;
3081 case want_vtbl_sigelem:
3082 result = &PL_vtbl_sigelem;
3083 break;
3084 case want_vtbl_pack:
3085 result = &PL_vtbl_pack;
3086 break;
3087 case want_vtbl_packelem:
3088 result = &PL_vtbl_packelem;
3089 break;
3090 case want_vtbl_dbline:
3091 result = &PL_vtbl_dbline;
3092 break;
3093 case want_vtbl_isa:
3094 result = &PL_vtbl_isa;
3095 break;
3096 case want_vtbl_isaelem:
3097 result = &PL_vtbl_isaelem;
3098 break;
3099 case want_vtbl_arylen:
3100 result = &PL_vtbl_arylen;
3101 break;
3102 case want_vtbl_glob:
3103 result = &PL_vtbl_glob;
3104 break;
3105 case want_vtbl_mglob:
3106 result = &PL_vtbl_mglob;
3107 break;
3108 case want_vtbl_nkeys:
3109 result = &PL_vtbl_nkeys;
3110 break;
3111 case want_vtbl_taint:
3112 result = &PL_vtbl_taint;
3113 break;
3114 case want_vtbl_substr:
3115 result = &PL_vtbl_substr;
3116 break;
3117 case want_vtbl_vec:
3118 result = &PL_vtbl_vec;
3119 break;
3120 case want_vtbl_pos:
3121 result = &PL_vtbl_pos;
3122 break;
3123 case want_vtbl_bm:
3124 result = &PL_vtbl_bm;
3125 break;
3126 case want_vtbl_fm:
3127 result = &PL_vtbl_fm;
3128 break;
3129 case want_vtbl_uvar:
3130 result = &PL_vtbl_uvar;
3131 break;
dc9e4912
GS		 3132 case want_vtbl_defelem:
3133 result = &PL_vtbl_defelem;
3134 break;
3135 case want_vtbl_regexp:
3136 result = &PL_vtbl_regexp;
3137 break;
3138 case want_vtbl_regdata:
3139 result = &PL_vtbl_regdata;
3140 break;
3141 case want_vtbl_regdatum:
3142 result = &PL_vtbl_regdatum;
3143 break;
3c90161d 3144#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3145 case want_vtbl_collxfrm:
3146 result = &PL_vtbl_collxfrm;
3147 break;
3c90161d 3148#endif
dc9e4912
GS		 3149 case want_vtbl_amagic:
3150 result = &PL_vtbl_amagic;
3151 break;
3152 case want_vtbl_amagicelem:
3153 result = &PL_vtbl_amagicelem;
3154 break;
810b8aa5
GS		 3155 case want_vtbl_backref:
3156 result = &PL_vtbl_backref;
3157 break;
7e8c5dac
HS		 3158 case want_vtbl_utf8:
3159 result = &PL_vtbl_utf8;
3160 break;
dc9e4912 3161 }
27da23d5 3162 return (MGVTBL*)result;
dc9e4912
GS		 3163}
3164
767df6a1 3165I32
864dbfa3 3166Perl_my_fflush_all(pTHX)
767df6a1 3167{
f800e14d 3168#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3169 return PerlIO_flush(NULL);
767df6a1 3170#else
8fbdfb7c 3171# if defined(HAS__FWALK)
f13a2bc0 3172 extern int fflush(FILE *);
74cac757
JH		 3173 /* undocumented, unprototyped, but very useful BSDism */
3174 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3175 _fwalk(&fflush);
74cac757 3176 return 0;
8fa7f367 3177# else
8fbdfb7c 3178# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3179 long open_max = -1;
8fbdfb7c 3180# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3181 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3182# else
8fa7f367 3183# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3184 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH		 3185# else
3186# ifdef FOPEN_MAX
74cac757 3187 open_max = FOPEN_MAX;
8fa7f367
JH		 3188# else
3189# ifdef OPEN_MAX
74cac757 3190 open_max = OPEN_MAX;
8fa7f367
JH		 3191# else
3192# ifdef _NFILE
d2201af2 3193 open_max = _NFILE;
8fa7f367
JH		 3194# endif
3195# endif
74cac757 3196# endif
767df6a1
JH		 3197# endif
3198# endif
767df6a1
JH		 3199 if (open_max > 0) {
3200 long i;
3201 for (i = 0; i < open_max; i++)
d2201af2
AD		 3202 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3203 STDIO_STREAM_ARRAY[i]._file < open_max &&
3204 STDIO_STREAM_ARRAY[i]._flag)
3205 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3206 return 0;
3207 }
8fbdfb7c 3208# endif
93189314 3209 SETERRNO(EBADF,RMS_IFI);
767df6a1 3210 return EOF;
74cac757 3211# endif
767df6a1
JH		 3212#endif
3213}
097ee67d 3214
69282e91 3215void
e1ec3a88 3216Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
bc37a18f 3217{
e1ec3a88 3218 const char *func =
66fc2fa5
JH		 3219 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3220 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
bc37a18f 3221 PL_op_desc[op];
e1ec3a88
AL		 3222 const char *pars = OP_IS_FILETEST(op) ? "" : "()";
3223 const char *type = OP_IS_SOCKET(op)
3aed30dc
HS		 3224 || (gv && io && IoTYPE(io) == IoTYPE_SOCKET)
3225 ? "socket" : "filehandle";
e1ec3a88 3226 const char *name = NULL;
bc37a18f 3227
66fc2fa5 3228 if (gv && isGV(gv)) {
f62cb720 3229 name = GvENAME(gv);
66fc2fa5
JH		 3230 }
3231
4c80c0b2 3232 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3aed30dc 3233 if (ckWARN(WARN_IO)) {
fd322ea4 3234 const char *direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out";
3aed30dc
HS		 3235 if (name && *name)
3236 Perl_warner(aTHX_ packWARN(WARN_IO),
3237 "Filehandle %s opened only for %sput",
fd322ea4 3238 name, direction);
3aed30dc
HS		 3239 else
3240 Perl_warner(aTHX_ packWARN(WARN_IO),
fd322ea4 3241 "Filehandle opened only for %sput", direction);
3aed30dc 3242 }
2dd78f96
JH		 3243 }
3244 else {
e1ec3a88 3245 const char *vile;
3aed30dc
HS		 3246 I32 warn_type;
3247
3248 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3249 vile = "closed";
3250 warn_type = WARN_CLOSED;
3251 }
3252 else {
3253 vile = "unopened";
3254 warn_type = WARN_UNOPENED;
3255 }
3256
3257 if (ckWARN(warn_type)) {
3258 if (name && *name) {
3259 Perl_warner(aTHX_ packWARN(warn_type),
3260 "%s%s on %s %s %s", func, pars, vile, type, name);
3261 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3262 Perl_warner(
3263 aTHX_ packWARN(warn_type),
3264 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3265 func, pars, name
3266 );
3267 }
3268 else {
3269 Perl_warner(aTHX_ packWARN(warn_type),
3270 "%s%s on %s %s", func, pars, vile, type);
3271 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3272 Perl_warner(
3273 aTHX_ packWARN(warn_type),
3274 "\t(Are you trying to call %s%s on dirhandle?)\n",
3275 func, pars
3276 );
3277 }
3278 }
bc37a18f 3279 }
69282e91 3280}
a926ef6b
JH		 3281
3282#ifdef EBCDIC
cbebf344
JH		 3283/* in ASCII order, not that it matters */
3284static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3285
a926ef6b
JH		 3286int
3287Perl_ebcdic_control(pTHX_ int ch)
3288{
3aed30dc 3289 if (ch > 'a') {
e1ec3a88 3290 const char *ctlp;
3aed30dc
HS		 3291
3292 if (islower(ch))
3293 ch = toupper(ch);
3294
3295 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3296 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
a926ef6b 3297 }
3aed30dc
HS		 3298
3299 if (ctlp == controllablechars)
3300 return('\177'); /* DEL */
3301 else
3302 return((unsigned char)(ctlp - controllablechars - 1));
3303 } else { /* Want uncontrol */
3304 if (ch == '\177' || ch == -1)
3305 return('?');
3306 else if (ch == '\157')
3307 return('\177');
3308 else if (ch == '\174')
3309 return('\000');
3310 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3311 return('\036');
3312 else if (ch == '\155')
3313 return('\037');
3314 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3315 return(controllablechars[ch+1]);
3316 else
3317 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3318 }
a926ef6b
JH		 3319}
3320#endif
e72cf795 3321
f6adc668 3322/* To workaround core dumps from the uninitialised tm_zone we get the
e72cf795
JH		 3323 * system to give us a reasonable struct to copy. This fix means that
3324 * strftime uses the tm_zone and tm_gmtoff values returned by
3325 * localtime(time()). That should give the desired result most of the
3326 * time. But probably not always!
3327 *
f6adc668
JH		 3328 * This does not address tzname aspects of NETaa14816.
3329 *
e72cf795 3330 */
f6adc668 3331
e72cf795
JH		 3332#ifdef HAS_GNULIBC
3333# ifndef STRUCT_TM_HASZONE
3334# define STRUCT_TM_HASZONE
3335# endif
3336#endif
3337
f6adc668
JH		 3338#ifdef STRUCT_TM_HASZONE /* Backward compat */
3339# ifndef HAS_TM_TM_ZONE
3340# define HAS_TM_TM_ZONE
3341# endif
3342#endif
3343
e72cf795 3344void
f1208910 3345Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795 3346{
f6adc668 3347#ifdef HAS_TM_TM_ZONE
e72cf795 3348 Time_t now;
82c57498 3349 struct tm* my_tm;
e72cf795 3350 (void)time(&now);
82c57498 3351 my_tm = localtime(&now);
ca46b8ee
SP		 3352 if (my_tm)
3353 Copy(my_tm, ptm, 1, struct tm);
e72cf795
JH		 3354#endif
3355}
3356
3357/*
3358 * mini_mktime - normalise struct tm values without the localtime()
3359 * semantics (and overhead) of mktime().
3360 */
3361void
f1208910 3362Perl_mini_mktime(pTHX_ struct tm *ptm)
e72cf795
JH		 3363{
3364 int yearday;
3365 int secs;
3366 int month, mday, year, jday;
3367 int odd_cent, odd_year;
3368
3369#define DAYS_PER_YEAR 365
3370#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3371#define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3372#define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3373#define SECS_PER_HOUR (60*60)
3374#define SECS_PER_DAY (24*SECS_PER_HOUR)
3375/* parentheses deliberately absent on these two, otherwise they don't work */
3376#define MONTH_TO_DAYS 153/5
3377#define DAYS_TO_MONTH 5/153
3378/* offset to bias by March (month 4) 1st between month/mday & year finding */
3379#define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3380/* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3381#define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3382
3383/*
3384 * Year/day algorithm notes:
3385 *
3386 * With a suitable offset for numeric value of the month, one can find
3387 * an offset into the year by considering months to have 30.6 (153/5) days,
3388 * using integer arithmetic (i.e., with truncation). To avoid too much
3389 * messing about with leap days, we consider January and February to be
3390 * the 13th and 14th month of the previous year. After that transformation,
3391 * we need the month index we use to be high by 1 from 'normal human' usage,
3392 * so the month index values we use run from 4 through 15.
3393 *
3394 * Given that, and the rules for the Gregorian calendar (leap years are those
3395 * divisible by 4 unless also divisible by 100, when they must be divisible
3396 * by 400 instead), we can simply calculate the number of days since some
3397 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3398 * the days we derive from our month index, and adding in the day of the
3399 * month. The value used here is not adjusted for the actual origin which
3400 * it normally would use (1 January A.D. 1), since we're not exposing it.
3401 * We're only building the value so we can turn around and get the
3402 * normalised values for the year, month, day-of-month, and day-of-year.
3403 *
3404 * For going backward, we need to bias the value we're using so that we find
3405 * the right year value. (Basically, we don't want the contribution of
3406 * March 1st to the number to apply while deriving the year). Having done
3407 * that, we 'count up' the contribution to the year number by accounting for
3408 * full quadracenturies (400-year periods) with their extra leap days, plus
3409 * the contribution from full centuries (to avoid counting in the lost leap
3410 * days), plus the contribution from full quad-years (to count in the normal
3411 * leap days), plus the leftover contribution from any non-leap years.
3412 * At this point, if we were working with an actual leap day, we'll have 0
3413 * days left over. This is also true for March 1st, however. So, we have
3414 * to special-case that result, and (earlier) keep track of the 'odd'
3415 * century and year contributions. If we got 4 extra centuries in a qcent,
3416 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3417 * Otherwise, we add back in the earlier bias we removed (the 123 from
3418 * figuring in March 1st), find the month index (integer division by 30.6),
3419 * and the remainder is the day-of-month. We then have to convert back to
3420 * 'real' months (including fixing January and February from being 14/15 in
3421 * the previous year to being in the proper year). After that, to get
3422 * tm_yday, we work with the normalised year and get a new yearday value for
3423 * January 1st, which we subtract from the yearday value we had earlier,
3424 * representing the date we've re-built. This is done from January 1
3425 * because tm_yday is 0-origin.
3426 *
3427 * Since POSIX time routines are only guaranteed to work for times since the
3428 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3429 * applies Gregorian calendar rules even to dates before the 16th century
3430 * doesn't bother me. Besides, you'd need cultural context for a given
3431 * date to know whether it was Julian or Gregorian calendar, and that's
3432 * outside the scope for this routine. Since we convert back based on the
3433 * same rules we used to build the yearday, you'll only get strange results
3434 * for input which needed normalising, or for the 'odd' century years which
3435 * were leap years in the Julian calander but not in the Gregorian one.
3436 * I can live with that.
3437 *
3438 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3439 * that's still outside the scope for POSIX time manipulation, so I don't
3440 * care.
3441 */
3442
3443 year = 1900 + ptm->tm_year;
3444 month = ptm->tm_mon;
3445 mday = ptm->tm_mday;
3446 /* allow given yday with no month & mday to dominate the result */
3447 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3448 month = 0;
3449 mday = 0;
3450 jday = 1 + ptm->tm_yday;
3451 }
3452 else {
3453 jday = 0;
3454 }
3455 if (month >= 2)
3456 month+=2;
3457 else
3458 month+=14, year--;
3459 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3460 yearday += month*MONTH_TO_DAYS + mday + jday;
3461 /*
3462 * Note that we don't know when leap-seconds were or will be,
3463 * so we have to trust the user if we get something which looks
3464 * like a sensible leap-second. Wild values for seconds will
3465 * be rationalised, however.
3466 */
3467 if ((unsigned) ptm->tm_sec <= 60) {
3468 secs = 0;
3469 }
3470 else {
3471 secs = ptm->tm_sec;
3472 ptm->tm_sec = 0;
3473 }
3474 secs += 60 * ptm->tm_min;
3475 secs += SECS_PER_HOUR * ptm->tm_hour;
3476 if (secs < 0) {
3477 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3478 /* got negative remainder, but need positive time */
3479 /* back off an extra day to compensate */
3480 yearday += (secs/SECS_PER_DAY)-1;
3481 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3482 }
3483 else {
3484 yearday += (secs/SECS_PER_DAY);
3485 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3486 }
3487 }
3488 else if (secs >= SECS_PER_DAY) {
3489 yearday += (secs/SECS_PER_DAY);
3490 secs %= SECS_PER_DAY;
3491 }
3492 ptm->tm_hour = secs/SECS_PER_HOUR;
3493 secs %= SECS_PER_HOUR;
3494 ptm->tm_min = secs/60;
3495 secs %= 60;
3496 ptm->tm_sec += secs;
3497 /* done with time of day effects */
3498 /*
3499 * The algorithm for yearday has (so far) left it high by 428.
3500 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3501 * bias it by 123 while trying to figure out what year it
3502 * really represents. Even with this tweak, the reverse
3503 * translation fails for years before A.D. 0001.
3504 * It would still fail for Feb 29, but we catch that one below.
3505 */
3506 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3507 yearday -= YEAR_ADJUST;
3508 year = (yearday / DAYS_PER_QCENT) * 400;
3509 yearday %= DAYS_PER_QCENT;
3510 odd_cent = yearday / DAYS_PER_CENT;
3511 year += odd_cent * 100;
3512 yearday %= DAYS_PER_CENT;
3513 year += (yearday / DAYS_PER_QYEAR) * 4;
3514 yearday %= DAYS_PER_QYEAR;
3515 odd_year = yearday / DAYS_PER_YEAR;
3516 year += odd_year;
3517 yearday %= DAYS_PER_YEAR;
3518 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3519 month = 1;
3520 yearday = 29;
3521 }
3522 else {
3523 yearday += YEAR_ADJUST; /* recover March 1st crock */
3524 month = yearday*DAYS_TO_MONTH;
3525 yearday -= month*MONTH_TO_DAYS;
3526 /* recover other leap-year adjustment */
3527 if (month > 13) {
3528 month-=14;
3529 year++;
3530 }
3531 else {
3532 month-=2;
3533 }
3534 }
3535 ptm->tm_year = year - 1900;
3536 if (yearday) {
3537 ptm->tm_mday = yearday;
3538 ptm->tm_mon = month;
3539 }
3540 else {
3541 ptm->tm_mday = 31;
3542 ptm->tm_mon = month - 1;
3543 }
3544 /* re-build yearday based on Jan 1 to get tm_yday */
3545 year--;
3546 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3547 yearday += 14*MONTH_TO_DAYS + 1;
3548 ptm->tm_yday = jday - yearday;
3549 /* fix tm_wday if not overridden by caller */
3550 if ((unsigned)ptm->tm_wday > 6)
3551 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3552}
b3c85772
JH		 3553
3554char *
e1ec3a88 3555Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
b3c85772
JH		 3556{
3557#ifdef HAS_STRFTIME
3558 char *buf;
3559 int buflen;
3560 struct tm mytm;
3561 int len;
3562
3563 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3564 mytm.tm_sec = sec;
3565 mytm.tm_min = min;
3566 mytm.tm_hour = hour;
3567 mytm.tm_mday = mday;
3568 mytm.tm_mon = mon;
3569 mytm.tm_year = year;
3570 mytm.tm_wday = wday;
3571 mytm.tm_yday = yday;
3572 mytm.tm_isdst = isdst;
3573 mini_mktime(&mytm);
c473feec
SR		 3574 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3575#if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3576 STMT_START {
3577 struct tm mytm2;
3578 mytm2 = mytm;
3579 mktime(&mytm2);
3580#ifdef HAS_TM_TM_GMTOFF
3581 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3582#endif
3583#ifdef HAS_TM_TM_ZONE
3584 mytm.tm_zone = mytm2.tm_zone;
3585#endif
3586 } STMT_END;
3587#endif
b3c85772
JH		 3588 buflen = 64;
3589 New(0, buf, buflen, char);
3590 len = strftime(buf, buflen, fmt, &mytm);
3591 /*
877f6a72 3592 ** The following is needed to handle to the situation where
b3c85772
JH		 3593 ** tmpbuf overflows. Basically we want to allocate a buffer
3594 ** and try repeatedly. The reason why it is so complicated
3595 ** is that getting a return value of 0 from strftime can indicate
3596 ** one of the following:
3597 ** 1. buffer overflowed,
3598 ** 2. illegal conversion specifier, or
3599 ** 3. the format string specifies nothing to be returned(not
3600 ** an error). This could be because format is an empty string
3601 ** or it specifies %p that yields an empty string in some locale.
3602 ** If there is a better way to make it portable, go ahead by
3603 ** all means.
3604 */
3605 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3606 return buf;
3607 else {
3608 /* Possibly buf overflowed - try again with a bigger buf */
e1ec3a88
AL		 3609 const int fmtlen = strlen(fmt);
3610 const int bufsize = fmtlen + buflen;
877f6a72 3611
b3c85772
JH		 3612 New(0, buf, bufsize, char);
3613 while (buf) {
3614 buflen = strftime(buf, bufsize, fmt, &mytm);
3615 if (buflen > 0 && buflen < bufsize)
3616 break;
3617 /* heuristic to prevent out-of-memory errors */
3618 if (bufsize > 100*fmtlen) {
3619 Safefree(buf);
3620 buf = NULL;
3621 break;
3622 }
e1ec3a88 3623 Renew(buf, bufsize*2, char);
b3c85772
JH		 3624 }
3625 return buf;
3626 }
3627#else
3628 Perl_croak(aTHX_ "panic: no strftime");
27da23d5 3629 return NULL;
b3c85772
JH		 3630#endif
3631}
3632
877f6a72
NIS		 3633
3634#define SV_CWD_RETURN_UNDEF \
3635sv_setsv(sv, &PL_sv_undef); \
3636return FALSE
3637
3638#define SV_CWD_ISDOT(dp) \
3639 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3aed30dc 3640 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
877f6a72
NIS		 3641
3642/*
ccfc67b7
JH		 3643=head1 Miscellaneous Functions
3644
89423764 3645=for apidoc getcwd_sv
877f6a72
NIS		 3646
3647Fill the sv with current working directory
3648
3649=cut
3650*/
3651
3652/* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3653 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3654 * getcwd(3) if available
3655 * Comments from the orignal:
3656 * This is a faster version of getcwd. It's also more dangerous
3657 * because you might chdir out of a directory that you can't chdir
3658 * back into. */
3659
877f6a72 3660int
89423764 3661Perl_getcwd_sv(pTHX_ register SV *sv)
877f6a72
NIS		 3662{
3663#ifndef PERL_MICRO
3664
ea715489
JH		 3665#ifndef INCOMPLETE_TAINTS
3666 SvTAINTED_on(sv);
3667#endif
3668
8f95b30d
JH		 3669#ifdef HAS_GETCWD
3670 {
60e110a8
DM		 3671 char buf[MAXPATHLEN];
3672
3aed30dc 3673 /* Some getcwd()s automatically allocate a buffer of the given
60e110a8
DM		 3674 * size from the heap if they are given a NULL buffer pointer.
3675 * The problem is that this behaviour is not portable. */
3aed30dc 3676 if (getcwd(buf, sizeof(buf) - 1)) {
4373e329 3677 sv_setpvn(sv, buf, strlen(buf));
3aed30dc
HS		 3678 return TRUE;
3679 }
3680 else {
3681 sv_setsv(sv, &PL_sv_undef);
3682 return FALSE;
3683 }
8f95b30d
JH		 3684 }
3685
3686#else
3687
c623ac67 3688 Stat_t statbuf;
877f6a72 3689 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
4373e329 3690 int pathlen=0;
877f6a72 3691 Direntry_t *dp;
877f6a72 3692
862a34c6 3693 SvUPGRADE(sv, SVt_PV);
877f6a72 3694
877f6a72 3695 if (PerlLIO_lstat(".", &statbuf) < 0) {
3aed30dc 3696 SV_CWD_RETURN_UNDEF;
877f6a72
NIS		 3697 }
3698
3699 orig_cdev = statbuf.st_dev;
3700 orig_cino = statbuf.st_ino;
3701 cdev = orig_cdev;
3702 cino = orig_cino;
3703
3704 for (;;) {
4373e329 3705 DIR *dir;
3aed30dc
HS		 3706 odev = cdev;
3707 oino = cino;
3708
3709 if (PerlDir_chdir("..") < 0) {
3710 SV_CWD_RETURN_UNDEF;
3711 }
3712 if (PerlLIO_stat(".", &statbuf) < 0) {
3713 SV_CWD_RETURN_UNDEF;
3714 }
3715
3716 cdev = statbuf.st_dev;
3717 cino = statbuf.st_ino;
3718
3719 if (odev == cdev && oino == cino) {
3720 break;
3721 }
3722 if (!(dir = PerlDir_open("."))) {
3723 SV_CWD_RETURN_UNDEF;
3724 }
3725
3726 while ((dp = PerlDir_read(dir)) != NULL) {
877f6a72 3727#ifdef DIRNAMLEN
4373e329 3728 const int namelen = dp->d_namlen;
877f6a72 3729#else
4373e329 3730 const int namelen = strlen(dp->d_name);
877f6a72 3731#endif
3aed30dc
HS		 3732 /* skip . and .. */
3733 if (SV_CWD_ISDOT(dp)) {
3734 continue;
3735 }