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[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) {
6ad3d225 155 PerlMem_free(where);
378cc40b 156 }
8d063cd8
LW		 157}
158
f2517201 159/* safe version of system's calloc() */
1050c9ca 160
bd4080b3 161Malloc_t
4f63d024 162Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 163{
54aff467 164 dTHX;
bd4080b3 165 Malloc_t ptr;
1050c9ca 166
55497cff 167#ifdef HAS_64K_LIMIT
5f05dabc 168 if (size * count > 0xffff) {
bf49b057 169 PerlIO_printf(Perl_error_log,
5f05dabc 170 "Allocation too large: %lx\n", size * count) FLUSH;
54aff467 171 my_exit(1);
5f05dabc 172 }
55497cff 173#endif /* HAS_64K_LIMIT */
1050c9ca 174#ifdef DEBUGGING
175 if ((long)size < 0 || (long)count < 0)
4f63d024 176 Perl_croak_nocontext("panic: calloc");
1050c9ca 177#endif
0b7c1c42 178 size *= count;
12ae5dfc 179 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 180 PERL_ALLOC_CHECK(ptr);
97835f67 181 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 182 if (ptr != Nullch) {
183 memset((void*)ptr, 0, size);
184 return ptr;
185 }
3280af22 186 else if (PL_nomemok)
1050c9ca 187 return Nullch;
188 else {
e0767201
GA		 189 /* Can't use PerlIO to write as it allocates memory */
190 PerlLIO_write(PerlIO_fileno(Perl_error_log),
191 PL_no_mem, strlen(PL_no_mem));
54aff467 192 my_exit(1);
4e35701f 193 return Nullch;
1050c9ca 194 }
195 /*NOTREACHED*/
196}
197
cae6d0e5
GS		 198/* These must be defined when not using Perl's malloc for binary
199 * compatibility */
200
201#ifndef MYMALLOC
202
203Malloc_t Perl_malloc (MEM_SIZE nbytes)
204{
205 dTHXs;
077a72a9 206 return (Malloc_t)PerlMem_malloc(nbytes);
cae6d0e5
GS		 207}
208
209Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
210{
211 dTHXs;
077a72a9 212 return (Malloc_t)PerlMem_calloc(elements, size);
cae6d0e5
GS		 213}
214
215Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
216{
217 dTHXs;
077a72a9 218 return (Malloc_t)PerlMem_realloc(where, nbytes);
cae6d0e5
GS		 219}
220
221Free_t Perl_mfree (Malloc_t where)
222{
223 dTHXs;
224 PerlMem_free(where);
225}
226
227#endif
228
8d063cd8
LW		 229/* copy a string up to some (non-backslashed) delimiter, if any */
230
231char *
e1ec3a88 232Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
8d063cd8 233{
fc36a67e 234 register I32 tolen;
235 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW		 236 if (*from == '\\') {
237 if (from[1] == delim)
238 from++;
fc36a67e 239 else {
240 if (to < toend)
241 *to++ = *from;
242 tolen++;
243 from++;
244 }
378cc40b 245 }
bedebaa5 246 else if (*from == delim)
8d063cd8 247 break;
fc36a67e 248 if (to < toend)
249 *to++ = *from;
8d063cd8 250 }
bedebaa5
CS		 251 if (to < toend)
252 *to = '\0';
fc36a67e 253 *retlen = tolen;
73d840c0 254 return (char *)from;
8d063cd8
LW		 255}
256
257/* return ptr to little string in big string, NULL if not found */
378cc40b 258/* This routine was donated by Corey Satten. */
8d063cd8
LW		 259
260char *
864dbfa3 261Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 262{
79072805 263 register I32 first;
378cc40b 264
a687059c 265 if (!little)
08105a92 266 return (char*)big;
a687059c 267 first = *little++;
378cc40b 268 if (!first)
08105a92 269 return (char*)big;
378cc40b 270 while (*big) {
66a1b24b 271 register const char *s, *x;
378cc40b
LW		 272 if (*big++ != first)
273 continue;
274 for (x=big,s=little; *s; /**/ ) {
275 if (!*x)
276 return Nullch;
277 if (*s++ != *x++) {
278 s--;
279 break;
280 }
281 }
282 if (!*s)
08105a92 283 return (char*)(big-1);
378cc40b
LW		 284 }
285 return Nullch;
286}
8d063cd8 287
a687059c
LW		 288/* same as instr but allow embedded nulls */
289
290char *
864dbfa3 291Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
8d063cd8 292{
e1ec3a88 293 register const I32 first = *little;
08105a92 294 register const char *littleend = lend;
378cc40b 295
a0d0e21e 296 if (!first && little >= littleend)
08105a92 297 return (char*)big;
de3bb511
LW		 298 if (bigend - big < littleend - little)
299 return Nullch;
a687059c
LW		 300 bigend -= littleend - little++;
301 while (big <= bigend) {
66a1b24b 302 register const char *s, *x;
a687059c
LW		 303 if (*big++ != first)
304 continue;
305 for (x=big,s=little; s < littleend; /**/ ) {
306 if (*s++ != *x++) {
307 s--;
308 break;
309 }
310 }
311 if (s >= littleend)
08105a92 312 return (char*)(big-1);
378cc40b 313 }
a687059c
LW		 314 return Nullch;
315}
316
317/* reverse of the above--find last substring */
318
319char *
864dbfa3 320Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 321{
08105a92 322 register const char *bigbeg;
e1ec3a88 323 register const I32 first = *little;
08105a92 324 register const char *littleend = lend;
a687059c 325
a0d0e21e 326 if (!first && little >= littleend)
08105a92 327 return (char*)bigend;
a687059c
LW		 328 bigbeg = big;
329 big = bigend - (littleend - little++);
330 while (big >= bigbeg) {
66a1b24b 331 register const char *s, *x;
a687059c
LW		 332 if (*big-- != first)
333 continue;
334 for (x=big+2,s=little; s < littleend; /**/ ) {
335 if (*s++ != *x++) {
336 s--;
337 break;
338 }
339 }
340 if (s >= littleend)
08105a92 341 return (char*)(big+1);
378cc40b 342 }
a687059c 343 return Nullch;
378cc40b 344}
a687059c 345
cf93c79d
IZ		 346#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
347
348/* As a space optimization, we do not compile tables for strings of length
349 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
350 special-cased in fbm_instr().
351
352 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
353
954c1994 354/*
ccfc67b7
JH		 355=head1 Miscellaneous Functions
356
954c1994
GS		 357=for apidoc fbm_compile
358
359Analyses the string in order to make fast searches on it using fbm_instr()
360-- the Boyer-Moore algorithm.
361
362=cut
363*/
364
378cc40b 365void
7506f9c3 366Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 367{
9cbe880b 368 const register U8 *s;
942e002e 369 register U8 *table;
79072805 370 register U32 i;
0b71040e 371 STRLEN len;
79072805
LW		 372 I32 rarest = 0;
373 U32 frequency = 256;
374
c517dc2b
JH		 375 if (flags & FBMcf_TAIL) {
376 MAGIC *mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
cf93c79d 377 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
c517dc2b
JH		 378 if (mg && mg->mg_len >= 0)
379 mg->mg_len++;
380 }
9cbe880b 381 s = (U8*)SvPV_force_mutable(sv, len);
862a34c6 382 SvUPGRADE(sv, SVt_PVBM);
d1be9408 383 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 384 return;
02128f11 385 if (len > 2) {
9cbe880b 386 const unsigned char *sb;
66a1b24b 387 const U8 mlen = (len>255) ? 255 : (U8)len;
cf93c79d 388
7506f9c3 389 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
9cbe880b 390 table = (unsigned char*)(SvPVX_mutable(sv) + len + FBM_TABLE_OFFSET);
7506f9c3
GS		 391 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
392 memset((void*)table, mlen, 256);
393 table[-1] = (U8)flags;
02128f11 394 i = 0;
7506f9c3 395 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ		 396 while (s >= sb) {
397 if (table[*s] == mlen)
7506f9c3 398 table[*s] = (U8)i;
cf93c79d
IZ		 399 s--, i++;
400 }
378cc40b 401 }
14befaf4 402 sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */
79072805 403 SvVALID_on(sv);
378cc40b 404
9cbe880b 405 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 406 for (i = 0; i < len; i++) {
22c35a8c 407 if (PL_freq[s[i]] < frequency) {
bbce6d69 408 rarest = i;
22c35a8c 409 frequency = PL_freq[s[i]];
378cc40b
LW		 410 }
411 }
79072805 412 BmRARE(sv) = s[rarest];
eb160463 413 BmPREVIOUS(sv) = (U16)rarest;
cf93c79d
IZ		 414 BmUSEFUL(sv) = 100; /* Initial value */
415 if (flags & FBMcf_TAIL)
416 SvTAIL_on(sv);
7506f9c3
GS		 417 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
418 BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW		 419}
420
cf93c79d
IZ		 421/* If SvTAIL(littlestr), it has a fake '\n' at end. */
422/* If SvTAIL is actually due to \Z or \z, this gives false positives
423 if multiline */
424
954c1994
GS		 425/*
426=for apidoc fbm_instr
427
428Returns the location of the SV in the string delimited by C<str> and
429C<strend>. It returns C<Nullch> if the string can't be found. The C<sv>
430does not have to be fbm_compiled, but the search will not be as fast
431then.
432
433=cut
434*/
435
378cc40b 436char *
864dbfa3 437Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 438{
a687059c 439 register unsigned char *s;
cf93c79d 440 STRLEN l;
9cbe880b
NC		 441 register const unsigned char *little
442 = (const unsigned char *)SvPV_const(littlestr,l);
cf93c79d 443 register STRLEN littlelen = l;
e1ec3a88 444 register const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 445
eb160463 446 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 447 if ( SvTAIL(littlestr)
eb160463 448 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 449 && (littlelen == 1
12ae5dfc 450 || (*big == *little &&
27da23d5 451 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d
IZ		 452 return (char*)big;
453 return Nullch;
454 }
378cc40b 455
cf93c79d 456 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ		 457
458 if (littlelen == 1) {
459 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
460 /* Know that bigend != big. */
461 if (bigend[-1] == '\n')
462 return (char *)(bigend - 1);
463 return (char *) bigend;
464 }
465 s = big;
466 while (s < bigend) {
467 if (*s == *little)
468 return (char *)s;
469 s++;
470 }
471 if (SvTAIL(littlestr))
472 return (char *) bigend;
473 return Nullch;
474 }
475 if (!littlelen)
476 return (char*)big; /* Cannot be SvTAIL! */
477
478 /* littlelen is 2 */
479 if (SvTAIL(littlestr) && !multiline) {
480 if (bigend[-1] == '\n' && bigend[-2] == *little)
481 return (char*)bigend - 2;
482 if (bigend[-1] == *little)
483 return (char*)bigend - 1;
484 return Nullch;
485 }
486 {
487 /* This should be better than FBM if c1 == c2, and almost
488 as good otherwise: maybe better since we do less indirection.
489 And we save a lot of memory by caching no table. */
66a1b24b
AL		 490 const unsigned char c1 = little[0];
491 const unsigned char c2 = little[1];
cf93c79d
IZ		 492
493 s = big + 1;
494 bigend--;
495 if (c1 != c2) {
496 while (s <= bigend) {
497 if (s[0] == c2) {
498 if (s[-1] == c1)
499 return (char*)s - 1;
500 s += 2;
501 continue;
3fe6f2dc 502 }
cf93c79d
IZ		 503 next_chars:
504 if (s[0] == c1) {
505 if (s == bigend)
506 goto check_1char_anchor;
507 if (s[1] == c2)
508 return (char*)s;
509 else {
510 s++;
511 goto next_chars;
512 }
513 }
514 else
515 s += 2;
516 }
517 goto check_1char_anchor;
518 }
519 /* Now c1 == c2 */
520 while (s <= bigend) {
521 if (s[0] == c1) {
522 if (s[-1] == c1)
523 return (char*)s - 1;
524 if (s == bigend)
525 goto check_1char_anchor;
526 if (s[1] == c1)
527 return (char*)s;
528 s += 3;
02128f11 529 }
c277df42 530 else
cf93c79d 531 s += 2;
c277df42 532 }
c277df42 533 }
cf93c79d
IZ		 534 check_1char_anchor: /* One char and anchor! */
535 if (SvTAIL(littlestr) && (*bigend == *little))
536 return (char *)bigend; /* bigend is already decremented. */
537 return Nullch;
d48672a2 538 }
cf93c79d 539 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 540 s = bigend - littlelen;
a1d180c4 541 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ		 542 /* Automatically of length > 2 */
543 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 544 {
bbce6d69 545 return (char*)s; /* how sweet it is */
7506f9c3
GS		 546 }
547 if (s[1] == *little
548 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
549 {
cf93c79d 550 return (char*)s + 1; /* how sweet it is */
7506f9c3 551 }
02128f11
IZ		 552 return Nullch;
553 }
cf93c79d
IZ		 554 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
555 char *b = ninstr((char*)big,(char*)bigend,
556 (char*)little, (char*)little + littlelen);
557
558 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
559 /* Chop \n from littlestr: */
560 s = bigend - littlelen + 1;
7506f9c3
GS		 561 if (*s == *little
562 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
563 {
3fe6f2dc 564 return (char*)s;
7506f9c3 565 }
cf93c79d 566 return Nullch;
a687059c 567 }
cf93c79d 568 return b;
a687059c 569 }
a1d180c4 570
cf93c79d 571 { /* Do actual FBM. */
e1ec3a88 572 register const unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
9cbe880b 573 const register unsigned char *oldlittle;
cf93c79d 574
eb160463 575 if (littlelen > (STRLEN)(bigend - big))
cf93c79d
IZ		 576 return Nullch;
577 --littlelen; /* Last char found by table lookup */
578
579 s = big + littlelen;
580 little += littlelen; /* last char */
581 oldlittle = little;
582 if (s < bigend) {
583 register I32 tmp;
584
585 top2:
7506f9c3 586 if ((tmp = table[*s])) {
cf93c79d 587 if ((s += tmp) < bigend)
62b28dd9 588 goto top2;
cf93c79d
IZ		 589 goto check_end;
590 }
591 else { /* less expensive than calling strncmp() */
66a1b24b 592 register unsigned char * const olds = s;
cf93c79d
IZ		 593
594 tmp = littlelen;
595
596 while (tmp--) {
597 if (*--s == *--little)
598 continue;
cf93c79d
IZ		 599 s = olds + 1; /* here we pay the price for failure */
600 little = oldlittle;
601 if (s < bigend) /* fake up continue to outer loop */
602 goto top2;
603 goto check_end;
604 }
605 return (char *)s;
a687059c 606 }
378cc40b 607 }
cf93c79d
IZ		 608 check_end:
609 if ( s == bigend && (table[-1] & FBMcf_TAIL)
12ae5dfc
JH		 610 && memEQ((char *)(bigend - littlelen),
611 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d
IZ		 612 return (char*)bigend - littlelen;
613 return Nullch;
378cc40b 614 }
378cc40b
LW		 615}
616
c277df42
IZ		 617/* start_shift, end_shift are positive quantities which give offsets
618 of ends of some substring of bigstr.
a0288114 619 If "last" we want the last occurrence.
c277df42 620 old_posp is the way of communication between consequent calls if
a1d180c4 621 the next call needs to find the .
c277df42 622 The initial *old_posp should be -1.
cf93c79d
IZ		 623
624 Note that we take into account SvTAIL, so one can get extra
625 optimizations if _ALL flag is set.
c277df42
IZ		 626 */
627
cf93c79d 628/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 629 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ		 630 is not supported yet. */
631
378cc40b 632char *
864dbfa3 633Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 634{
cfd0369c 635 const register unsigned char *big;
79072805
LW		 636 register I32 pos;
637 register I32 previous;
638 register I32 first;
cfd0369c 639 const register unsigned char *little;
c277df42 640 register I32 stop_pos;
cfd0369c 641 const register unsigned char *littleend;
c277df42 642 I32 found = 0;
378cc40b 643
c277df42 644 if (*old_posp == -1
3280af22 645 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 646 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
647 cant_find:
a1d180c4 648 if ( BmRARE(littlestr) == '\n'
cf93c79d 649 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
cfd0369c 650 little = (const unsigned char *)(SvPVX_const(littlestr));
cf93c79d
IZ		 651 littleend = little + SvCUR(littlestr);
652 first = *little++;
653 goto check_tail;
654 }
378cc40b 655 return Nullch;
cf93c79d
IZ		 656 }
657
cfd0369c 658 little = (const unsigned char *)(SvPVX_const(littlestr));
79072805 659 littleend = little + SvCUR(littlestr);
378cc40b 660 first = *little++;
c277df42 661 /* The value of pos we can start at: */
79072805 662 previous = BmPREVIOUS(littlestr);
cfd0369c 663 big = (const unsigned char *)(SvPVX_const(bigstr));
c277df42
IZ		 664 /* The value of pos we can stop at: */
665 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 666 if (previous + start_shift > stop_pos) {
0fe87f7c
HS		 667/*
668 stop_pos does not include SvTAIL in the count, so this check is incorrect
669 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
670*/
671#if 0
cf93c79d
IZ		 672 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
673 goto check_tail;
0fe87f7c 674#endif
cf93c79d
IZ		 675 return Nullch;
676 }
c277df42 677 while (pos < previous + start_shift) {
3280af22 678 if (!(pos += PL_screamnext[pos]))
cf93c79d 679 goto cant_find;
378cc40b 680 }
de3bb511 681 big -= previous;
bbce6d69 682 do {
cfd0369c 683 const register unsigned char *s, *x;
ef64f398 684 if (pos >= stop_pos) break;
bbce6d69 685 if (big[pos] != first)
686 continue;
687 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69 688 if (*s++ != *x++) {
689 s--;
690 break;
378cc40b 691 }
bbce6d69 692 }
c277df42
IZ		 693 if (s == littleend) {
694 *old_posp = pos;
695 if (!last) return (char *)(big+pos);
696 found = 1;
697 }
3280af22 698 } while ( pos += PL_screamnext[pos] );
a1d180c4 699 if (last && found)
cf93c79d 700 return (char *)(big+(*old_posp));
cf93c79d
IZ		 701 check_tail:
702 if (!SvTAIL(littlestr) || (end_shift > 0))
703 return Nullch;
704 /* Ignore the trailing "\n". This code is not microoptimized */
cfd0369c 705 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
cf93c79d
IZ		 706 stop_pos = littleend - little; /* Actual littlestr len */
707 if (stop_pos == 0)
708 return (char*)big;
709 big -= stop_pos;
710 if (*big == first
12ae5dfc
JH		 711 && ((stop_pos == 1) ||
712 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d
IZ		 713 return (char*)big;
714 return Nullch;
8d063cd8
LW		 715}
716
79072805 717I32
864dbfa3 718Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 719{
e1ec3a88
AL		 720 register const U8 *a = (const U8 *)s1;
721 register const U8 *b = (const U8 *)s2;
79072805 722 while (len--) {
22c35a8c 723 if (*a != *b && *a != PL_fold[*b])
bbce6d69 724 return 1;
725 a++,b++;
726 }
727 return 0;
728}
729
730I32
864dbfa3 731Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 732{
27da23d5 733 dVAR;
e1ec3a88
AL		 734 register const U8 *a = (const U8 *)s1;
735 register const U8 *b = (const U8 *)s2;
bbce6d69 736 while (len--) {
22c35a8c 737 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69 738 return 1;
739 a++,b++;
79072805
LW		 740 }
741 return 0;
742}
743
8d063cd8
LW		 744/* copy a string to a safe spot */
745
954c1994 746/*
ccfc67b7
JH		 747=head1 Memory Management
748
954c1994
GS		 749=for apidoc savepv
750
61a925ed
AMS		 751Perl's version of C<strdup()>. Returns a pointer to a newly allocated
752string which is a duplicate of C<pv>. The size of the string is
753determined by C<strlen()>. The memory allocated for the new string can
754be freed with the C<Safefree()> function.
954c1994
GS		 755
756=cut
757*/
758
8d063cd8 759char *
efdfce31 760Perl_savepv(pTHX_ const char *pv)
8d063cd8 761{
e90e2364
NC		 762 if (!pv)
763 return Nullch;
66a1b24b
AL		 764 else {
765 char *newaddr;
766 const STRLEN pvlen = strlen(pv)+1;
767 New(902,newaddr,pvlen,char);
490a0e98 768 return memcpy(newaddr,pv,pvlen);
66a1b24b 769 }
e90e2364 770
8d063cd8
LW		 771}
772
a687059c
LW		 773/* same thing but with a known length */
774
954c1994
GS		 775/*
776=for apidoc savepvn
777
61a925ed
AMS		 778Perl's version of what C<strndup()> would be if it existed. Returns a
779pointer to a newly allocated string which is a duplicate of the first
780C<len> bytes from C<pv>. The memory allocated for the new string can be
781freed with the C<Safefree()> function.
954c1994
GS		 782
783=cut
784*/
785
a687059c 786char *
efdfce31 787Perl_savepvn(pTHX_ const char *pv, register I32 len)
a687059c
LW		 788{
789 register char *newaddr;
790
791 New(903,newaddr,len+1,char);
92110913 792 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 793 if (pv) {
e90e2364
NC		 794 /* might not be null terminated */
795 newaddr[len] = '\0';
07409e01 796 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS		 797 }
798 else {
07409e01 799 return (char *) ZeroD(newaddr,len+1,char);
92110913 800 }
a687059c
LW		 801}
802
05ec9bb3
NIS		 803/*
804=for apidoc savesharedpv
805
61a925ed
AMS		 806A version of C<savepv()> which allocates the duplicate string in memory
807which is shared between threads.
05ec9bb3
NIS		 808
809=cut
810*/
811char *
efdfce31 812Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 813{
e90e2364 814 register char *newaddr;
490a0e98 815 STRLEN pvlen;
e90e2364
NC		 816 if (!pv)
817 return Nullch;
818
490a0e98
NC		 819 pvlen = strlen(pv)+1;
820 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364
NC		 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 }
490a0e98 826 return memcpy(newaddr,pv,pvlen);
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 954STATIC COP*
8772537c 955S_closest_cop(pTHX_ COP *cop, const OP *o)
ae7d165c
PJ		 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
8772537c 982 return Null(COP *);
ae7d165c
PJ		 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 */
53c1dcc0 1056 const int e = errno;
7ff03255 1057#endif
53c1dcc0 1058 PerlIO * const serr = Perl_error_log;
7ff03255
SG		 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
cfd0369c 1111STATIC const char *
e07360fa
AT		 1112S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1113 I32* utf8)
1114{
1115 dVAR;
cfd0369c 1116 const char *message;
e07360fa
AT		 1117
1118 if (pat) {
1119 SV *msv = vmess(pat, args);
1120 if (PL_errors && SvCUR(PL_errors)) {
1121 sv_catsv(PL_errors, msv);
cfd0369c 1122 message = SvPV_const(PL_errors, *msglen);
e07360fa
AT		 1123 SvCUR_set(PL_errors, 0);
1124 }
1125 else
cfd0369c 1126 message = SvPV_const(msv,*msglen);
e07360fa
AT		 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 1205 else if (!message)
cfd0369c 1206 message = SvPVx_const(ERRSV, msglen);
84414e3e 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;
06bf62c7 1259 STRLEN msglen;
53c1dcc0
AL		 1260 SV * const msv = vmess(pat, args);
1261 const I32 utf8 = SvUTF8(msv);
1262 const char * const message = SvPV_const(msv, msglen);
a687059c 1263
3280af22 1264 if (PL_warnhook) {
cea2e8a9 1265 /* sv_2cv might call Perl_warn() */
53c1dcc0
AL		 1266 SV * const oldwarnhook = PL_warnhook;
1267 CV * cv;
1268 HV * stash;
1269 GV * gv;
1270
1738f5c4 1271 ENTER;
3280af22
NIS		 1272 SAVESPTR(PL_warnhook);
1273 PL_warnhook = Nullsv;
20cec16a 1274 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS		 1275 LEAVE;
1276 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1277 dSP;
774d564b 1278 SV *msg;
1279
1280 ENTER;
3a1f2dc9 1281 save_re_context();
06bf62c7 1282 msg = newSVpvn(message, msglen);
ff882698 1283 SvFLAGS(msg) |= utf8;
774d564b 1284 SvREADONLY_on(msg);
1285 SAVEFREESV(msg);
1286
e788e7d3 1287 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1288 PUSHMARK(SP);
774d564b 1289 XPUSHs(msg);
20cec16a 1290 PUTBACK;
864dbfa3 1291 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1292 POPSTACK;
774d564b 1293 LEAVE;
20cec16a 1294 return;
1295 }
748a9306 1296 }
87582a92 1297
7ff03255 1298 write_to_stderr(message, msglen);
a687059c 1299}
8d063cd8 1300
c5be433b 1301#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1302void
1303Perl_warn_nocontext(const char *pat, ...)
1304{
1305 dTHX;
1306 va_list args;
1307 va_start(args, pat);
c5be433b 1308 vwarn(pat, &args);
cea2e8a9
GS		 1309 va_end(args);
1310}
1311#endif /* PERL_IMPLICIT_CONTEXT */
1312
954c1994
GS		 1313/*
1314=for apidoc warn
1315
966353fd
MF		 1316This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1317function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS		 1318
1319=cut
1320*/
1321
cea2e8a9
GS		 1322void
1323Perl_warn(pTHX_ const char *pat, ...)
1324{
1325 va_list args;
1326 va_start(args, pat);
c5be433b 1327 vwarn(pat, &args);
cea2e8a9
GS		 1328 va_end(args);
1329}
1330
c5be433b
GS		 1331#if defined(PERL_IMPLICIT_CONTEXT)
1332void
1333Perl_warner_nocontext(U32 err, const char *pat, ...)
1334{
27da23d5 1335 dTHX;
c5be433b
GS		 1336 va_list args;
1337 va_start(args, pat);
1338 vwarner(err, pat, &args);
1339 va_end(args);
1340}
1341#endif /* PERL_IMPLICIT_CONTEXT */
1342
599cee73 1343void
864dbfa3 1344Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM		 1345{
1346 va_list args;
c5be433b
GS		 1347 va_start(args, pat);
1348 vwarner(err, pat, &args);
1349 va_end(args);
1350}
1351
1352void
1353Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1354{
27da23d5 1355 dVAR;
d13b0d77 1356 if (ckDEAD(err)) {
a3b680e6 1357 SV * const msv = vmess(pat, args);
d13b0d77 1358 STRLEN msglen;
cfd0369c 1359 const char *message = SvPV_const(msv, msglen);
a3b680e6 1360 const I32 utf8 = SvUTF8(msv);
599cee73 1361
3aed30dc 1362 if (PL_diehook) {
63315e18
NC		 1363 assert(message);
1364 S_vdie_common(aTHX_ message, msglen, utf8);
3aed30dc
HS		 1365 }
1366 if (PL_in_eval) {
1367 PL_restartop = die_where(message, msglen);
ff882698 1368 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS		 1369 JMPENV_JUMP(3);
1370 }
7ff03255 1371 write_to_stderr(message, msglen);
3aed30dc 1372 my_failure_exit();
599cee73
PM		 1373 }
1374 else {
d13b0d77 1375 Perl_vwarn(aTHX_ pat, args);
599cee73
PM		 1376 }
1377}
1378
e6587932
DM		 1379/* since we've already done strlen() for both nam and val
1380 * we can use that info to make things faster than
1381 * sprintf(s, "%s=%s", nam, val)
1382 */
1383#define my_setenv_format(s, nam, nlen, val, vlen) \
1384 Copy(nam, s, nlen, char); \
1385 *(s+nlen) = '='; \
1386 Copy(val, s+(nlen+1), vlen, char); \
1387 *(s+(nlen+1+vlen)) = '\0'
1388
13b6e58c 1389#ifdef USE_ENVIRON_ARRAY
eccd403f 1390 /* VMS' my_setenv() is in vms.c */
2986a63f 1391#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1392void
e1ec3a88 1393Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1394{
27da23d5 1395 dVAR;
4efc5df6
GS		 1396#ifdef USE_ITHREADS
1397 /* only parent thread can modify process environment */
1398 if (PL_curinterp == aTHX)
1399#endif
1400 {
f2517201 1401#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1402 if (!PL_use_safe_putenv) {
f2517201 1403 /* most putenv()s leak, so we manipulate environ directly */
79072805 1404 register I32 i=setenv_getix(nam); /* where does it go? */
e6587932 1405 int nlen, vlen;
8d063cd8 1406
3280af22 1407 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW		 1408 I32 j;
1409 I32 max;
fe14fcc3
LW		 1410 char **tmpenv;
1411
1412 for (max = i; environ[max]; max++) ;
f2517201
GS		 1413 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1414 for (j=0; j<max; j++) { /* copy environment */
e1ec3a88 1415 const int len = strlen(environ[j]);
3aed30dc
HS		 1416 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1417 Copy(environ[j], tmpenv[j], len+1, char);
f2517201 1418 }
fe14fcc3
LW		 1419 tmpenv[max] = Nullch;
1420 environ = tmpenv; /* tell exec where it is now */
1421 }
a687059c 1422 if (!val) {
f2517201 1423 safesysfree(environ[i]);
a687059c
LW		 1424 while (environ[i]) {
1425 environ[i] = environ[i+1];
1426 i++;
1427 }
1428 return;
1429 }
8d063cd8 1430 if (!environ[i]) { /* does not exist yet */
f2517201 1431 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW		 1432 environ[i+1] = Nullch; /* make sure it's null terminated */
1433 }
fe14fcc3 1434 else
f2517201 1435 safesysfree(environ[i]);
e6587932
DM		 1436 nlen = strlen(nam);
1437 vlen = strlen(val);
f2517201 1438
e6587932
DM		 1439 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1440 /* all that work just for this */
1441 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95
MS		 1442 } else {
1443# endif
27da23d5 1444# if defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
47dafe4d
EF		 1445 setenv(nam, val, 1);
1446# else
f2517201 1447 char *new_env;
53c1dcc0
AL		 1448 const int nlen = strlen(nam);
1449 int vlen;
e6587932 1450 if (!val) {
3aed30dc 1451 val = "";
e6587932
DM		 1452 }
1453 vlen = strlen(val);
1454 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1455 /* all that work just for this */
1456 my_setenv_format(new_env, nam, nlen, val, vlen);
f2517201 1457 (void)putenv(new_env);
47dafe4d 1458# endif /* __CYGWIN__ */
50acdf95
MS		 1459#ifndef PERL_USE_SAFE_PUTENV
1460 }
1461#endif
4efc5df6 1462 }
8d063cd8
LW		 1463}
1464
2986a63f 1465#else /* WIN32 || NETWARE */
68dc0745 1466
1467void
72229eff 1468Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1469{
27da23d5 1470 dVAR;
ac5c734f 1471 register char *envstr;
e1ec3a88
AL		 1472 const int nlen = strlen(nam);
1473 int vlen;
e6587932 1474
ac5c734f
GS		 1475 if (!val) {
1476 val = "";
1477 }
e6587932
DM		 1478 vlen = strlen(val);
1479 New(904, envstr, nlen+vlen+2, char);
1480 my_setenv_format(envstr, nam, nlen, val, vlen);
ac5c734f
GS		 1481 (void)PerlEnv_putenv(envstr);
1482 Safefree(envstr);
3e3baf6d
TB		 1483}
1484
2986a63f 1485#endif /* WIN32 || NETWARE */
3e3baf6d 1486
2f42fcb0 1487#ifndef PERL_MICRO
3e3baf6d 1488I32
e1ec3a88 1489Perl_setenv_getix(pTHX_ const char *nam)
3e3baf6d 1490{
53c1dcc0
AL		 1491 register I32 i;
1492 const register I32 len = strlen(nam);
3e3baf6d
TB		 1493
1494 for (i = 0; environ[i]; i++) {
1495 if (
1496#ifdef WIN32
1497 strnicmp(environ[i],nam,len) == 0
1498#else
1499 strnEQ(environ[i],nam,len)
1500#endif
1501 && environ[i][len] == '=')
1502 break; /* strnEQ must come first to avoid */
1503 } /* potential SEGV's */
1504 return i;
68dc0745 1505}
2f42fcb0 1506#endif /* !PERL_MICRO */
68dc0745 1507
ed79a026 1508#endif /* !VMS && !EPOC*/
378cc40b 1509
16d20bd9 1510#ifdef UNLINK_ALL_VERSIONS
79072805 1511I32
864dbfa3 1512Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
378cc40b 1513{
79072805 1514 I32 i;
378cc40b 1515
6ad3d225 1516 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW		 1517 return i ? 0 : -1;
1518}
1519#endif
1520
7a3f2258 1521/* this is a drop-in replacement for bcopy() */
2253333f 1522#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1523char *
7a3f2258 1524Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b
LW		 1525{
1526 char *retval = to;
1527
7c0587c8
LW		 1528 if (from - to >= 0) {
1529 while (len--)
1530 *to++ = *from++;
1531 }
1532 else {
1533 to += len;
1534 from += len;
1535 while (len--)
faf8582f 1536 *(--to) = *(--from);
7c0587c8 1537 }
378cc40b
LW		 1538 return retval;
1539}
ffed7fef 1540#endif
378cc40b 1541
7a3f2258 1542/* this is a drop-in replacement for memset() */
fc36a67e 1543#ifndef HAS_MEMSET
1544void *
7a3f2258 1545Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1546{
1547 char *retval = loc;
1548
1549 while (len--)
1550 *loc++ = ch;
1551 return retval;
1552}
1553#endif
1554
7a3f2258 1555/* this is a drop-in replacement for bzero() */
7c0587c8 1556#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1557char *
7a3f2258 1558Perl_my_bzero(register char *loc, register I32 len)
378cc40b
LW		 1559{
1560 char *retval = loc;
1561
1562 while (len--)
1563 *loc++ = 0;
1564 return retval;
1565}
1566#endif
7c0587c8 1567
7a3f2258 1568/* this is a drop-in replacement for memcmp() */
36477c24 1569#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1570I32
7a3f2258 1571Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1572{
e1ec3a88
AL		 1573 register const U8 *a = (const U8 *)s1;
1574 register const U8 *b = (const U8 *)s2;
79072805 1575 register I32 tmp;
7c0587c8
LW		 1576
1577 while (len--) {
27da23d5 1578 if ((tmp = *a++ - *b++))
7c0587c8
LW		 1579 return tmp;
1580 }
1581 return 0;
1582}
36477c24 1583#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1584
fe14fcc3 1585#ifndef HAS_VPRINTF
a687059c 1586
85e6fe83 1587#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1588char *
1589#else
1590int
1591#endif
08105a92 1592vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 1593{
1594 FILE fakebuf;
1595
1596 fakebuf._ptr = dest;
1597 fakebuf._cnt = 32767;
35c8bce7
LW		 1598#ifndef _IOSTRG
1599#define _IOSTRG 0
1600#endif
a687059c
LW		 1601 fakebuf._flag = _IOWRT|_IOSTRG;
1602 _doprnt(pat, args, &fakebuf); /* what a kludge */
1603 (void)putc('\0', &fakebuf);
85e6fe83 1604#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1605 return(dest);
1606#else
1607 return 0; /* perl doesn't use return value */
1608#endif
1609}
1610
fe14fcc3 1611#endif /* HAS_VPRINTF */
a687059c
LW		 1612
1613#ifdef MYSWAP
ffed7fef 1614#if BYTEORDER != 0x4321
a687059c 1615short
864dbfa3 1616Perl_my_swap(pTHX_ short s)
a687059c
LW		 1617{
1618#if (BYTEORDER & 1) == 0
1619 short result;
1620
1621 result = ((s & 255) << 8) + ((s >> 8) & 255);
1622 return result;
1623#else
1624 return s;
1625#endif
1626}
1627
1628long
864dbfa3 1629Perl_my_htonl(pTHX_ long l)
a687059c
LW		 1630{
1631 union {
1632 long result;
ffed7fef 1633 char c[sizeof(long)];
a687059c
LW		 1634 } u;
1635
ffed7fef 1636#if BYTEORDER == 0x1234
a687059c
LW		 1637 u.c[0] = (l >> 24) & 255;
1638 u.c[1] = (l >> 16) & 255;
1639 u.c[2] = (l >> 8) & 255;
1640 u.c[3] = l & 255;
1641 return u.result;
1642#else
ffed7fef 1643#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1644 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1645#else
79072805
LW		 1646 register I32 o;
1647 register I32 s;
a687059c 1648
ffed7fef
LW		 1649 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1650 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 1651 }
1652 return u.result;
1653#endif
1654#endif
1655}
1656
1657long
864dbfa3 1658Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 1659{
1660 union {
1661 long l;
ffed7fef 1662 char c[sizeof(long)];
a687059c
LW		 1663 } u;
1664
ffed7fef 1665#if BYTEORDER == 0x1234
a687059c
LW		 1666 u.c[0] = (l >> 24) & 255;
1667 u.c[1] = (l >> 16) & 255;
1668 u.c[2] = (l >> 8) & 255;
1669 u.c[3] = l & 255;
1670 return u.l;
1671#else
ffed7fef 1672#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1673 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1674#else
79072805
LW		 1675 register I32 o;
1676 register I32 s;
a687059c
LW		 1677
1678 u.l = l;
1679 l = 0;
ffed7fef
LW		 1680 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1681 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 1682 }
1683 return l;
1684#endif
1685#endif
1686}
1687
ffed7fef 1688#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 1689#endif /* MYSWAP */
1690
1691/*
1692 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1693 * If these functions are defined,
1694 * the BYTEORDER is neither 0x1234 nor 0x4321.
1695 * However, this is not assumed.
1696 * -DWS
1697 */
1698
1109a392 1699#define HTOLE(name,type) \
988174c1 1700 type \
ba106d47 1701 name (register type n) \
988174c1
LW		 1702 { \
1703 union { \
1704 type value; \
1705 char c[sizeof(type)]; \
1706 } u; \
79072805 1707 register I32 i; \
1109a392
MHM		 1708 register I32 s = 0; \
1709 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW		 1710 u.c[i] = (n >> s) & 0xFF; \
1711 } \
1712 return u.value; \
1713 }
1714
1109a392 1715#define LETOH(name,type) \
988174c1 1716 type \
ba106d47 1717 name (register type n) \
988174c1
LW		 1718 { \
1719 union { \
1720 type value; \
1721 char c[sizeof(type)]; \
1722 } u; \
79072805 1723 register I32 i; \
1109a392 1724 register I32 s = 0; \
988174c1
LW		 1725 u.value = n; \
1726 n = 0; \
1109a392
MHM		 1727 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1728 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW		 1729 } \
1730 return n; \
1731 }
1732
1109a392
MHM		 1733/*
1734 * Big-endian byte order functions.
1735 */
1736
1737#define HTOBE(name,type) \
1738 type \
1739 name (register type n) \
1740 { \
1741 union { \
1742 type value; \
1743 char c[sizeof(type)]; \
1744 } u; \
1745 register I32 i; \
1746 register I32 s = 8*(sizeof(u.c)-1); \
1747 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1748 u.c[i] = (n >> s) & 0xFF; \
1749 } \
1750 return u.value; \
1751 }
1752
1753#define BETOH(name,type) \
1754 type \
1755 name (register type n) \
1756 { \
1757 union { \
1758 type value; \
1759 char c[sizeof(type)]; \
1760 } u; \
1761 register I32 i; \
1762 register I32 s = 8*(sizeof(u.c)-1); \
1763 u.value = n; \
1764 n = 0; \
1765 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1766 n |= ((type)(u.c[i] & 0xFF)) << s; \
1767 } \
1768 return n; \
1769 }
1770
1771/*
1772 * If we just can't do it...
1773 */
1774
1775#define NOT_AVAIL(name,type) \
1776 type \
1777 name (register type n) \
1778 { \
1779 Perl_croak_nocontext(#name "() not available"); \
1780 return n; /* not reached */ \
1781 }
1782
1783
988174c1 1784#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 1785HTOLE(htovs,short)
988174c1
LW		 1786#endif
1787#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 1788HTOLE(htovl,long)
988174c1
LW		 1789#endif
1790#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 1791LETOH(vtohs,short)
988174c1
LW		 1792#endif
1793#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM		 1794LETOH(vtohl,long)
1795#endif
1796
1797#ifdef PERL_NEED_MY_HTOLE16
1798# if U16SIZE == 2
1799HTOLE(Perl_my_htole16,U16)
1800# else
1801NOT_AVAIL(Perl_my_htole16,U16)
1802# endif
1803#endif
1804#ifdef PERL_NEED_MY_LETOH16
1805# if U16SIZE == 2
1806LETOH(Perl_my_letoh16,U16)
1807# else
1808NOT_AVAIL(Perl_my_letoh16,U16)
1809# endif
1810#endif
1811#ifdef PERL_NEED_MY_HTOBE16
1812# if U16SIZE == 2
1813HTOBE(Perl_my_htobe16,U16)
1814# else
1815NOT_AVAIL(Perl_my_htobe16,U16)
1816# endif
1817#endif
1818#ifdef PERL_NEED_MY_BETOH16
1819# if U16SIZE == 2
1820BETOH(Perl_my_betoh16,U16)
1821# else
1822NOT_AVAIL(Perl_my_betoh16,U16)
1823# endif
1824#endif
1825
1826#ifdef PERL_NEED_MY_HTOLE32
1827# if U32SIZE == 4
1828HTOLE(Perl_my_htole32,U32)
1829# else
1830NOT_AVAIL(Perl_my_htole32,U32)
1831# endif
1832#endif
1833#ifdef PERL_NEED_MY_LETOH32
1834# if U32SIZE == 4
1835LETOH(Perl_my_letoh32,U32)
1836# else
1837NOT_AVAIL(Perl_my_letoh32,U32)
1838# endif
1839#endif
1840#ifdef PERL_NEED_MY_HTOBE32
1841# if U32SIZE == 4
1842HTOBE(Perl_my_htobe32,U32)
1843# else
1844NOT_AVAIL(Perl_my_htobe32,U32)
1845# endif
1846#endif
1847#ifdef PERL_NEED_MY_BETOH32
1848# if U32SIZE == 4
1849BETOH(Perl_my_betoh32,U32)
1850# else
1851NOT_AVAIL(Perl_my_betoh32,U32)
1852# endif
1853#endif
1854
1855#ifdef PERL_NEED_MY_HTOLE64
1856# if U64SIZE == 8
1857HTOLE(Perl_my_htole64,U64)
1858# else
1859NOT_AVAIL(Perl_my_htole64,U64)
1860# endif
1861#endif
1862#ifdef PERL_NEED_MY_LETOH64
1863# if U64SIZE == 8
1864LETOH(Perl_my_letoh64,U64)
1865# else
1866NOT_AVAIL(Perl_my_letoh64,U64)
1867# endif
1868#endif
1869#ifdef PERL_NEED_MY_HTOBE64
1870# if U64SIZE == 8
1871HTOBE(Perl_my_htobe64,U64)
1872# else
1873NOT_AVAIL(Perl_my_htobe64,U64)
1874# endif
1875#endif
1876#ifdef PERL_NEED_MY_BETOH64
1877# if U64SIZE == 8
1878BETOH(Perl_my_betoh64,U64)
1879# else
1880NOT_AVAIL(Perl_my_betoh64,U64)
1881# endif
988174c1 1882#endif
a687059c 1883
1109a392
MHM		 1884#ifdef PERL_NEED_MY_HTOLES
1885HTOLE(Perl_my_htoles,short)
1886#endif
1887#ifdef PERL_NEED_MY_LETOHS
1888LETOH(Perl_my_letohs,short)
1889#endif
1890#ifdef PERL_NEED_MY_HTOBES
1891HTOBE(Perl_my_htobes,short)
1892#endif
1893#ifdef PERL_NEED_MY_BETOHS
1894BETOH(Perl_my_betohs,short)
1895#endif
1896
1897#ifdef PERL_NEED_MY_HTOLEI
1898HTOLE(Perl_my_htolei,int)
1899#endif
1900#ifdef PERL_NEED_MY_LETOHI
1901LETOH(Perl_my_letohi,int)
1902#endif
1903#ifdef PERL_NEED_MY_HTOBEI
1904HTOBE(Perl_my_htobei,int)
1905#endif
1906#ifdef PERL_NEED_MY_BETOHI
1907BETOH(Perl_my_betohi,int)
1908#endif
1909
1910#ifdef PERL_NEED_MY_HTOLEL
1911HTOLE(Perl_my_htolel,long)
1912#endif
1913#ifdef PERL_NEED_MY_LETOHL
1914LETOH(Perl_my_letohl,long)
1915#endif
1916#ifdef PERL_NEED_MY_HTOBEL
1917HTOBE(Perl_my_htobel,long)
1918#endif
1919#ifdef PERL_NEED_MY_BETOHL
1920BETOH(Perl_my_betohl,long)
1921#endif
1922
1923void
1924Perl_my_swabn(void *ptr, int n)
1925{
1926 register char *s = (char *)ptr;
1927 register char *e = s + (n-1);
1928 register char tc;
1929
1930 for (n /= 2; n > 0; s++, e--, n--) {
1931 tc = *s;
1932 *s = *e;
1933 *e = tc;
1934 }
1935}
1936
4a7d1889
NIS		 1937PerlIO *
1938Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
1939{
2986a63f 1940#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
1f852d0d
NIS		 1941 int p[2];
1942 register I32 This, that;
1943 register Pid_t pid;
1944 SV *sv;
1945 I32 did_pipes = 0;
1946 int pp[2];
1947
1948 PERL_FLUSHALL_FOR_CHILD;
1949 This = (*mode == 'w');
1950 that = !This;
1951 if (PL_tainting) {
1952 taint_env();
1953 taint_proper("Insecure %s%s", "EXEC");
1954 }
1955 if (PerlProc_pipe(p) < 0)
1956 return Nullfp;
1957 /* Try for another pipe pair for error return */
1958 if (PerlProc_pipe(pp) >= 0)
1959 did_pipes = 1;
52e18b1f 1960 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS		 1961 if (errno != EAGAIN) {
1962 PerlLIO_close(p[This]);
4e6dfe71 1963 PerlLIO_close(p[that]);
1f852d0d
NIS		 1964 if (did_pipes) {
1965 PerlLIO_close(pp[0]);
1966 PerlLIO_close(pp[1]);
1967 }
1968 return Nullfp;
1969 }
1970 sleep(5);
1971 }
1972 if (pid == 0) {
1973 /* Child */
1f852d0d
NIS		 1974#undef THIS
1975#undef THAT
1976#define THIS that
1977#define THAT This
1f852d0d
NIS		 1978 /* Close parent's end of error status pipe (if any) */
1979 if (did_pipes) {
1980 PerlLIO_close(pp[0]);
1981#if defined(HAS_FCNTL) && defined(F_SETFD)
1982 /* Close error pipe automatically if exec works */
1983 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1984#endif
1985 }
1986 /* Now dup our end of _the_ pipe to right position */
1987 if (p[THIS] != (*mode == 'r')) {
1988 PerlLIO_dup2(p[THIS], *mode == 'r');
1989 PerlLIO_close(p[THIS]);
4e6dfe71
GS		 1990 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
1991 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 1992 }
4e6dfe71
GS		 1993 else
1994 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS		 1995#if !defined(HAS_FCNTL) || !defined(F_SETFD)
1996 /* No automatic close - do it by hand */
b7953727
JH		 1997# ifndef NOFILE
1998# define NOFILE 20
1999# endif
a080fe3d
NIS		 2000 {
2001 int fd;
2002
2003 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2004 if (fd != pp[1])
a080fe3d
NIS		 2005 PerlLIO_close(fd);
2006 }
1f852d0d
NIS		 2007 }
2008#endif
2009 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
2010 PerlProc__exit(1);
2011#undef THIS
2012#undef THAT
2013 }
2014 /* Parent */
52e18b1f 2015 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS		 2016 if (did_pipes)
2017 PerlLIO_close(pp[1]);
2018 /* Keep the lower of the two fd numbers */
2019 if (p[that] < p[This]) {
2020 PerlLIO_dup2(p[This], p[that]);
2021 PerlLIO_close(p[This]);
2022 p[This] = p[that];
2023 }
4e6dfe71
GS		 2024 else
2025 PerlLIO_close(p[that]); /* close child's end of pipe */
2026
1f852d0d
NIS		 2027 LOCK_FDPID_MUTEX;
2028 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2029 UNLOCK_FDPID_MUTEX;
862a34c6 2030 SvUPGRADE(sv,SVt_IV);
45977657 2031 SvIV_set(sv, pid);
1f852d0d
NIS		 2032 PL_forkprocess = pid;
2033 /* If we managed to get status pipe check for exec fail */
2034 if (did_pipes && pid > 0) {
2035 int errkid;
2036 int n = 0, n1;
2037
2038 while (n < sizeof(int)) {
2039 n1 = PerlLIO_read(pp[0],
2040 (void*)(((char*)&errkid)+n),
2041 (sizeof(int)) - n);
2042 if (n1 <= 0)
2043 break;
2044 n += n1;
2045 }
2046 PerlLIO_close(pp[0]);
2047 did_pipes = 0;
2048 if (n) { /* Error */
2049 int pid2, status;
8c51524e 2050 PerlLIO_close(p[This]);
1f852d0d
NIS		 2051 if (n != sizeof(int))
2052 Perl_croak(aTHX_ "panic: kid popen errno read");
2053 do {
2054 pid2 = wait4pid(pid, &status, 0);
2055 } while (pid2 == -1 && errno == EINTR);
2056 errno = errkid; /* Propagate errno from kid */
2057 return Nullfp;
2058 }
2059 }
2060 if (did_pipes)
2061 PerlLIO_close(pp[0]);
2062 return PerlIO_fdopen(p[This], mode);
2063#else
4a7d1889
NIS		 2064 Perl_croak(aTHX_ "List form of piped open not implemented");
2065 return (PerlIO *) NULL;
1f852d0d 2066#endif
4a7d1889
NIS		 2067}
2068
5f05dabc 2069 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 2070#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 2071PerlIO *
864dbfa3 2072Perl_my_popen(pTHX_ char *cmd, char *mode)
a687059c
LW		 2073{
2074 int p[2];
8ac85365 2075 register I32 This, that;
d8a83dd3 2076 register Pid_t pid;
79072805 2077 SV *sv;
770526c1 2078 I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ		 2079 I32 did_pipes = 0;
2080 int pp[2];
a687059c 2081
45bc9206 2082 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2083#ifdef OS2
2084 if (doexec) {
23da6c43 2085 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2086 }
a1d180c4 2087#endif
8ac85365
NIS		 2088 This = (*mode == 'w');
2089 that = !This;
3280af22 2090 if (doexec && PL_tainting) {
bbce6d69 2091 taint_env();
2092 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2093 }
c2267164
IZ		 2094 if (PerlProc_pipe(p) < 0)
2095 return Nullfp;
e446cec8
IZ		 2096 if (doexec && PerlProc_pipe(pp) >= 0)
2097 did_pipes = 1;
52e18b1f 2098 while ((pid = PerlProc_fork()) < 0) {
a687059c 2099 if (errno != EAGAIN) {
6ad3d225 2100 PerlLIO_close(p[This]);
b5ac89c3 2101 PerlLIO_close(p[that]);
e446cec8
IZ		 2102 if (did_pipes) {
2103 PerlLIO_close(pp[0]);
2104 PerlLIO_close(pp[1]);
2105 }
a687059c 2106 if (!doexec)
cea2e8a9 2107 Perl_croak(aTHX_ "Can't fork");
a687059c
LW		 2108 return Nullfp;
2109 }
2110 sleep(5);
2111 }
2112 if (pid == 0) {
79072805
LW		 2113 GV* tmpgv;
2114
30ac6d9b
GS		 2115#undef THIS
2116#undef THAT
a687059c 2117#define THIS that
8ac85365 2118#define THAT This
e446cec8
IZ		 2119 if (did_pipes) {
2120 PerlLIO_close(pp[0]);
2121#if defined(HAS_FCNTL) && defined(F_SETFD)
2122 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2123#endif
2124 }
a687059c 2125 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2126 PerlLIO_dup2(p[THIS], *mode == 'r');
2127 PerlLIO_close(p[THIS]);
b5ac89c3
NIS		 2128 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2129 PerlLIO_close(p[THAT]);
a687059c 2130 }
b5ac89c3
NIS		 2131 else
2132 PerlLIO_close(p[THAT]);
4435c477 2133#ifndef OS2
a687059c 2134 if (doexec) {
a0d0e21e 2135#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2136#ifndef NOFILE
2137#define NOFILE 20
2138#endif
a080fe3d 2139 {
3aed30dc 2140 int fd;
a080fe3d
NIS		 2141
2142 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2143 if (fd != pp[1])
3aed30dc 2144 PerlLIO_close(fd);
a080fe3d 2145 }
ae986130 2146#endif
a080fe3d
NIS		 2147 /* may or may not use the shell */
2148 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2149 PerlProc__exit(1);
a687059c 2150 }
4435c477 2151#endif /* defined OS2 */
306196c3 2152 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4d76a344 2153 SvREADONLY_off(GvSV(tmpgv));
7766f137 2154 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS		 2155 SvREADONLY_on(GvSV(tmpgv));
2156 }
2157#ifdef THREADS_HAVE_PIDS
2158 PL_ppid = (IV)getppid();
2159#endif
3280af22
NIS		 2160 PL_forkprocess = 0;
2161 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW		 2162 return Nullfp;
2163#undef THIS
2164#undef THAT
2165 }
b5ac89c3 2166 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ		 2167 if (did_pipes)
2168 PerlLIO_close(pp[1]);
8ac85365 2169 if (p[that] < p[This]) {
6ad3d225
GS		 2170 PerlLIO_dup2(p[This], p[that]);
2171 PerlLIO_close(p[This]);
8ac85365 2172 p[This] = p[that];
62b28dd9 2173 }
b5ac89c3
NIS		 2174 else
2175 PerlLIO_close(p[that]);
2176
4755096e 2177 LOCK_FDPID_MUTEX;
3280af22 2178 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2179 UNLOCK_FDPID_MUTEX;
862a34c6 2180 SvUPGRADE(sv,SVt_IV);
45977657 2181 SvIV_set(sv, pid);
3280af22 2182 PL_forkprocess = pid;
e446cec8
IZ		 2183 if (did_pipes && pid > 0) {
2184 int errkid;
2185 int n = 0, n1;
2186
2187 while (n < sizeof(int)) {
2188 n1 = PerlLIO_read(pp[0],
2189 (void*)(((char*)&errkid)+n),
2190 (sizeof(int)) - n);
2191 if (n1 <= 0)
2192 break;
2193 n += n1;
2194 }
2f96c702
IZ		 2195 PerlLIO_close(pp[0]);
2196 did_pipes = 0;
e446cec8 2197 if (n) { /* Error */
faa466a7 2198 int pid2, status;
8c51524e 2199 PerlLIO_close(p[This]);
e446cec8 2200 if (n != sizeof(int))
cea2e8a9 2201 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG		 2202 do {
2203 pid2 = wait4pid(pid, &status, 0);
2204 } while (pid2 == -1 && errno == EINTR);
e446cec8
IZ		 2205 errno = errkid; /* Propagate errno from kid */
2206 return Nullfp;
2207 }
2208 }
2209 if (did_pipes)
2210 PerlLIO_close(pp[0]);
8ac85365 2211 return PerlIO_fdopen(p[This], mode);
a687059c 2212}
7c0587c8 2213#else
85ca448a 2214#if defined(atarist) || defined(EPOC)
7c0587c8 2215FILE *popen();
760ac839 2216PerlIO *
864dbfa3 2217Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2218{
45bc9206 2219 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS		 2220 /* Call system's popen() to get a FILE *, then import it.
2221 used 0 for 2nd parameter to PerlIO_importFILE;
2222 apparently not used
2223 */
2224 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2225}
2b96b0a5
JH		 2226#else
2227#if defined(DJGPP)
2228FILE *djgpp_popen();
2229PerlIO *
2230Perl_my_popen(pTHX_ char *cmd, char *mode)
2231{
2232 PERL_FLUSHALL_FOR_CHILD;
2233 /* Call system's popen() to get a FILE *, then import it.
2234 used 0 for 2nd parameter to PerlIO_importFILE;
2235 apparently not used
2236 */
2237 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2238}
2239#endif
7c0587c8
LW		 2240#endif
2241
2242#endif /* !DOSISH */
a687059c 2243
52e18b1f
GS		 2244/* this is called in parent before the fork() */
2245void
2246Perl_atfork_lock(void)
2247{
27da23d5 2248 dVAR;
3db8f154 2249#if defined(USE_ITHREADS)
52e18b1f
GS		 2250 /* locks must be held in locking order (if any) */
2251# ifdef MYMALLOC
2252 MUTEX_LOCK(&PL_malloc_mutex);
2253# endif
2254 OP_REFCNT_LOCK;
2255#endif
2256}
2257
2258/* this is called in both parent and child after the fork() */
2259void
2260Perl_atfork_unlock(void)
2261{
27da23d5 2262 dVAR;
3db8f154 2263#if defined(USE_ITHREADS)
52e18b1f
GS		 2264 /* locks must be released in same order as in atfork_lock() */
2265# ifdef MYMALLOC
2266 MUTEX_UNLOCK(&PL_malloc_mutex);
2267# endif
2268 OP_REFCNT_UNLOCK;
2269#endif
2270}
2271
2272Pid_t
2273Perl_my_fork(void)
2274{
2275#if defined(HAS_FORK)
2276 Pid_t pid;
3db8f154 2277#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS		 2278 atfork_lock();
2279 pid = fork();
2280 atfork_unlock();
2281#else
2282 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2283 * handlers elsewhere in the code */
2284 pid = fork();
2285#endif
2286 return pid;
2287#else
2288 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2289 Perl_croak_nocontext("fork() not available");
b961a566 2290 return 0;
52e18b1f
GS		 2291#endif /* HAS_FORK */
2292}
2293
748a9306 2294#ifdef DUMP_FDS
35ff7856 2295void
864dbfa3 2296Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2297{
2298 int fd;
c623ac67 2299 Stat_t tmpstatbuf;
ae986130 2300
bf49b057 2301 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2302 for (fd = 0; fd < 32; fd++) {
6ad3d225 2303 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2304 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2305 }
bf49b057 2306 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2307 return;
ae986130 2308}
35ff7856 2309#endif /* DUMP_FDS */
ae986130 2310
fe14fcc3 2311#ifndef HAS_DUP2
fec02dd3 2312int
ba106d47 2313dup2(int oldfd, int newfd)
a687059c 2314{
a0d0e21e 2315#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2316 if (oldfd == newfd)
2317 return oldfd;
6ad3d225 2318 PerlLIO_close(newfd);
fec02dd3 2319 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2320#else
fc36a67e 2321#define DUP2_MAX_FDS 256
2322 int fdtmp[DUP2_MAX_FDS];
79072805 2323 I32 fdx = 0;
ae986130
LW		 2324 int fd;
2325
fe14fcc3 2326 if (oldfd == newfd)
fec02dd3 2327 return oldfd;
6ad3d225 2328 PerlLIO_close(newfd);
fc36a67e 2329 /* good enough for low fd's... */
6ad3d225 2330 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2331 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2332 PerlLIO_close(fd);
fc36a67e 2333 fd = -1;
2334 break;
2335 }
ae986130 2336 fdtmp[fdx++] = fd;
fc36a67e 2337 }
ae986130 2338 while (fdx > 0)
6ad3d225 2339 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2340 return fd;
62b28dd9 2341#endif
a687059c
LW		 2342}
2343#endif
2344
64ca3a65 2345#ifndef PERL_MICRO
ff68c719 2346#ifdef HAS_SIGACTION
2347
abea2c45
HS		 2348#ifdef MACOS_TRADITIONAL
2349/* We don't want restart behavior on MacOS */
2350#undef SA_RESTART
2351#endif
2352
ff68c719 2353Sighandler_t
864dbfa3 2354Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2355{
27da23d5 2356 dVAR;
ff68c719 2357 struct sigaction act, oact;
2358
a10b1e10
JH		 2359#ifdef USE_ITHREADS
2360 /* only "parent" interpreter can diddle signals */
2361 if (PL_curinterp != aTHX)
2362 return SIG_ERR;
2363#endif
2364
ff68c719 2365 act.sa_handler = handler;
2366 sigemptyset(&act.sa_mask);
2367 act.sa_flags = 0;
2368#ifdef SA_RESTART
4ffa73a3
JH		 2369 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2370 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2371#endif
358837b8 2372#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
85264bed
CS		 2373 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2374 act.sa_flags |= SA_NOCLDWAIT;
2375#endif
ff68c719 2376 if (sigaction(signo, &act, &oact) == -1)
36477c24 2377 return SIG_ERR;
ff68c719 2378 else
36477c24 2379 return oact.sa_handler;
ff68c719 2380}
2381
2382Sighandler_t
864dbfa3 2383Perl_rsignal_state(pTHX_ int signo)
ff68c719 2384{
2385 struct sigaction oact;
2386
2387 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
3aed30dc 2388 return SIG_ERR;
ff68c719 2389 else
3aed30dc 2390 return oact.sa_handler;
ff68c719 2391}
2392
2393int
864dbfa3 2394Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2395{
27da23d5 2396 dVAR;
ff68c719 2397 struct sigaction act;
2398
a10b1e10
JH		 2399#ifdef USE_ITHREADS
2400 /* only "parent" interpreter can diddle signals */
2401 if (PL_curinterp != aTHX)
2402 return -1;
2403#endif
2404
ff68c719 2405 act.sa_handler = handler;
2406 sigemptyset(&act.sa_mask);
2407 act.sa_flags = 0;
2408#ifdef SA_RESTART
4ffa73a3
JH		 2409 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2410 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2411#endif
36b5d377 2412#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
85264bed
CS		 2413 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2414 act.sa_flags |= SA_NOCLDWAIT;
2415#endif
ff68c719 2416 return sigaction(signo, &act, save);
2417}
2418
2419int
864dbfa3 2420Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2421{
27da23d5 2422 dVAR;
a10b1e10
JH		 2423#ifdef USE_ITHREADS
2424 /* only "parent" interpreter can diddle signals */
2425 if (PL_curinterp != aTHX)
2426 return -1;
2427#endif
2428
ff68c719 2429 return sigaction(signo, save, (struct sigaction *)NULL);
2430}
2431
2432#else /* !HAS_SIGACTION */
2433
2434Sighandler_t
864dbfa3 2435Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2436{
39f1703b 2437#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2438 /* only "parent" interpreter can diddle signals */
2439 if (PL_curinterp != aTHX)
2440 return SIG_ERR;
2441#endif
2442
6ad3d225 2443 return PerlProc_signal(signo, handler);
ff68c719 2444}
2445
ff68c719 2446static
2447Signal_t
4e35701f 2448sig_trap(int signo)
ff68c719 2449{
27da23d5
JH		 2450 dVAR;
2451 PL_sig_trapped++;
ff68c719 2452}
2453
2454Sighandler_t
864dbfa3 2455Perl_rsignal_state(pTHX_ int signo)
ff68c719 2456{
27da23d5 2457 dVAR;
ff68c719 2458 Sighandler_t oldsig;
2459
39f1703b 2460#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2461 /* only "parent" interpreter can diddle signals */
2462 if (PL_curinterp != aTHX)
2463 return SIG_ERR;
2464#endif
2465
27da23d5 2466 PL_sig_trapped = 0;
6ad3d225
GS		 2467 oldsig = PerlProc_signal(signo, sig_trap);
2468 PerlProc_signal(signo, oldsig);
27da23d5 2469 if (PL_sig_trapped)
3aed30dc 2470 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719 2471 return oldsig;
2472}
2473
2474int
864dbfa3 2475Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2476{
39f1703b 2477#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2478 /* only "parent" interpreter can diddle signals */
2479 if (PL_curinterp != aTHX)
2480 return -1;
2481#endif
6ad3d225 2482 *save = PerlProc_signal(signo, handler);
ff68c719 2483 return (*save == SIG_ERR) ? -1 : 0;
2484}
2485
2486int
864dbfa3 2487Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2488{
39f1703b 2489#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2490 /* only "parent" interpreter can diddle signals */
2491 if (PL_curinterp != aTHX)
2492 return -1;
2493#endif
6ad3d225 2494 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
ff68c719 2495}
2496
2497#endif /* !HAS_SIGACTION */
64ca3a65 2498#endif /* !PERL_MICRO */
ff68c719 2499
5f05dabc 2500 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2501#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2502I32
864dbfa3 2503Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2504{
ff68c719 2505 Sigsave_t hstat, istat, qstat;
a687059c 2506 int status;
a0d0e21e 2507 SV **svp;
d8a83dd3
JH		 2508 Pid_t pid;
2509 Pid_t pid2;
03136e13 2510 bool close_failed;
b7953727 2511 int saved_errno = 0;
22fae026
TM		 2512#ifdef WIN32
2513 int saved_win32_errno;
2514#endif
a687059c 2515
4755096e 2516 LOCK_FDPID_MUTEX;
3280af22 2517 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2518 UNLOCK_FDPID_MUTEX;
25d92023 2519 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2520 SvREFCNT_dec(*svp);
3280af22 2521 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2522#ifdef OS2
2523 if (pid == -1) { /* Opened by popen. */
2524 return my_syspclose(ptr);
2525 }
a1d180c4 2526#endif
03136e13
CS		 2527 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2528 saved_errno = errno;
22fae026
TM		 2529#ifdef WIN32
2530 saved_win32_errno = GetLastError();
2531#endif
03136e13 2532 }
7c0587c8 2533#ifdef UTS
6ad3d225 2534 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2535#endif
64ca3a65 2536#ifndef PERL_MICRO
ff68c719 2537 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2538 rsignal_save(SIGINT, SIG_IGN, &istat);
2539 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
64ca3a65 2540#endif
748a9306 2541 do {
1d3434b8
GS		 2542 pid2 = wait4pid(pid, &status, 0);
2543 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2544#ifndef PERL_MICRO
ff68c719 2545 rsignal_restore(SIGHUP, &hstat);
2546 rsignal_restore(SIGINT, &istat);
2547 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2548#endif
03136e13 2549 if (close_failed) {
ce6e1103 2550 SETERRNO(saved_errno, 0);
03136e13
CS		 2551 return -1;
2552 }
1d3434b8 2553 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2554}
4633a7c4
LW		 2555#endif /* !DOSISH */
2556
2986a63f 2557#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
79072805 2558I32
d8a83dd3 2559Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2560{
27da23d5 2561 I32 result = 0;
b7953727
JH		 2562 if (!pid)
2563 return -1;
2564#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2565 {
cf28e18a 2566 char spid[TYPE_CHARS(IV)];
20188a90 2567
3aed30dc 2568 if (pid > 0) {
27da23d5 2569 SV** svp;
7b0972df 2570 sprintf(spid, "%"IVdf, (IV)pid);
3aed30dc
HS		 2571 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2572 if (svp && *svp != &PL_sv_undef) {
2573 *statusp = SvIVX(*svp);
2574 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2575 return pid;
2576 }
2577 }
2578 else {
2579 HE *entry;
2580
2581 hv_iterinit(PL_pidstatus);
2582 if ((entry = hv_iternext(PL_pidstatus))) {
27da23d5
JH		 2583 SV *sv = hv_iterval(PL_pidstatus,entry);
2584
3aed30dc 2585 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3aed30dc
HS		 2586 *statusp = SvIVX(sv);
2587 sprintf(spid, "%"IVdf, (IV)pid);
2588 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2589 return pid;
2590 }
20188a90
LW		 2591 }
2592 }
68a29c53 2593#endif
79072805 2594#ifdef HAS_WAITPID
367f3c24
IZ		 2595# ifdef HAS_WAITPID_RUNTIME
2596 if (!HAS_WAITPID_RUNTIME)
2597 goto hard_way;
2598# endif
cddd4526 2599 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2600 goto finish;
367f3c24
IZ		 2601#endif
2602#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
cddd4526 2603 result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
dfcfdb64 2604 goto finish;
367f3c24
IZ		 2605#endif
2606#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
27da23d5 2607#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2608 hard_way:
27da23d5 2609#endif
a0d0e21e 2610 {
a0d0e21e 2611 if (flags)
cea2e8a9 2612 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2613 else {
76e3520e 2614 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2615 pidgone(result,*statusp);
2616 if (result < 0)
2617 *statusp = -1;
2618 }
a687059c
LW		 2619 }
2620#endif
27da23d5 2621#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 2622 finish:
27da23d5 2623#endif
cddd4526
NIS		 2624 if (result < 0 && errno == EINTR) {
2625 PERL_ASYNC_CHECK();
2626 }
2627 return result;
a687059c 2628}
2986a63f 2629#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2630
7c0587c8 2631void
d8a83dd3 2632Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2633{
79072805 2634 register SV *sv;
cf28e18a 2635 char spid[TYPE_CHARS(IV)];
a687059c 2636
7b0972df 2637 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2638 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
862a34c6 2639 SvUPGRADE(sv,SVt_IV);
45977657 2640 SvIV_set(sv, status);
20188a90 2641 return;
a687059c
LW		 2642}
2643
85ca448a 2644#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 2645int pclose();
ddcf38b7
IZ		 2646#ifdef HAS_FORK
2647int /* Cannot prototype with I32
2648 in os2ish.h. */
ba106d47 2649my_syspclose(PerlIO *ptr)
ddcf38b7 2650#else
79072805 2651I32
864dbfa3 2652Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2653#endif
a687059c 2654{
760ac839
LW		 2655 /* Needs work for PerlIO ! */
2656 FILE *f = PerlIO_findFILE(ptr);
2657 I32 result = pclose(f);
2b96b0a5
JH		 2658 PerlIO_releaseFILE(ptr,f);
2659 return result;
2660}
2661#endif
2662
933fea7f 2663#if defined(DJGPP)
2b96b0a5
JH		 2664int djgpp_pclose();
2665I32
2666Perl_my_pclose(pTHX_ PerlIO *ptr)
2667{
2668 /* Needs work for PerlIO ! */
2669 FILE *f = PerlIO_findFILE(ptr);
2670 I32 result = djgpp_pclose(f);
933fea7f 2671 result = (result << 8) & 0xff00;
760ac839
LW		 2672 PerlIO_releaseFILE(ptr,f);
2673 return result;
a687059c 2674}
7c0587c8 2675#endif
9f68db38
LW		 2676
2677void
864dbfa3 2678Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2679{
79072805 2680 register I32 todo;
08105a92 2681 register const char *frombase = from;
9f68db38
LW		 2682
2683 if (len == 1) {
08105a92 2684 register const char c = *from;
9f68db38 2685 while (count-- > 0)
5926133d 2686 *to++ = c;
9f68db38
LW		 2687 return;
2688 }
2689 while (count-- > 0) {
2690 for (todo = len; todo > 0; todo--) {
2691 *to++ = *from++;
2692 }
2693 from = frombase;
2694 }
2695}
0f85fab0 2696
fe14fcc3 2697#ifndef HAS_RENAME
79072805 2698I32
4373e329 2699Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 2700{
93a17b20
LW		 2701 char *fa = strrchr(a,'/');
2702 char *fb = strrchr(b,'/');
c623ac67
GS		 2703 Stat_t tmpstatbuf1;
2704 Stat_t tmpstatbuf2;
46fc3d4c 2705 SV *tmpsv = sv_newmortal();
62b28dd9
LW		 2706
2707 if (fa)
2708 fa++;
2709 else
2710 fa = a;
2711 if (fb)
2712 fb++;
2713 else
2714 fb = b;
2715 if (strNE(a,b))
2716 return FALSE;
2717 if (fa == a)
616d8c9c 2718 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2719 else
46fc3d4c 2720 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 2721 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 2722 return FALSE;
2723 if (fb == b)
616d8c9c 2724 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2725 else
46fc3d4c 2726 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 2727 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 2728 return FALSE;
2729 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2730 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2731}
fe14fcc3
LW		 2732#endif /* !HAS_RENAME */
2733
491527d0 2734char*
e1ec3a88 2735Perl_find_script(pTHX_ const char *scriptname, bool dosearch, const char **search_ext, I32 flags)
491527d0 2736{
e1ec3a88 2737 const char *xfound = Nullch;
491527d0 2738 char *xfailed = Nullch;
0f31cffe 2739 char tmpbuf[MAXPATHLEN];
491527d0 2740 register char *s;
5f74f29c 2741 I32 len = 0;
491527d0
GS		 2742 int retval;
2743#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2744# define SEARCH_EXTS ".bat", ".cmd", NULL
2745# define MAX_EXT_LEN 4
2746#endif
2747#ifdef OS2
2748# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2749# define MAX_EXT_LEN 4
2750#endif
2751#ifdef VMS
2752# define SEARCH_EXTS ".pl", ".com", NULL
2753# define MAX_EXT_LEN 4
2754#endif
2755 /* additional extensions to try in each dir if scriptname not found */
2756#ifdef SEARCH_EXTS
e1ec3a88
AL		 2757 const char *exts[] = { SEARCH_EXTS };
2758 const char **ext = search_ext ? search_ext : exts;
491527d0 2759 int extidx = 0, i = 0;
e1ec3a88 2760 const char *curext = Nullch;
491527d0 2761#else
53c1dcc0 2762 PERL_UNUSED_ARG(search_ext);
491527d0
GS		 2763# define MAX_EXT_LEN 0
2764#endif
2765
2766 /*
2767 * If dosearch is true and if scriptname does not contain path
2768 * delimiters, search the PATH for scriptname.
2769 *
2770 * If SEARCH_EXTS is also defined, will look for each
2771 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2772 * while searching the PATH.
2773 *
2774 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2775 * proceeds as follows:
2776 * If DOSISH or VMSISH:
2777 * + look for ./scriptname{,.foo,.bar}
2778 * + search the PATH for scriptname{,.foo,.bar}
2779 *
2780 * If !DOSISH:
2781 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2782 * this will not look in '.' if it's not in the PATH)
2783 */
84486fc6 2784 tmpbuf[0] = '\0';
491527d0
GS		 2785
2786#ifdef VMS
2787# ifdef ALWAYS_DEFTYPES
2788 len = strlen(scriptname);
2789 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2790 int hasdir, idx = 0, deftypes = 1;
2791 bool seen_dot = 1;
2792
2793 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2794# else
2795 if (dosearch) {
2796 int hasdir, idx = 0, deftypes = 1;
2797 bool seen_dot = 1;
2798
2799 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2800# endif
2801 /* The first time through, just add SEARCH_EXTS to whatever we
2802 * already have, so we can check for default file types. */
2803 while (deftypes ||
84486fc6 2804 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 2805 {
2806 if (deftypes) {
2807 deftypes = 0;
84486fc6 2808 *tmpbuf = '\0';
491527d0 2809 }
84486fc6
GS		 2810 if ((strlen(tmpbuf) + strlen(scriptname)
2811 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2812 continue; /* don't search dir with too-long name */
84486fc6 2813 strcat(tmpbuf, scriptname);
491527d0
GS		 2814#else /* !VMS */
2815
2816#ifdef DOSISH
2817 if (strEQ(scriptname, "-"))
2818 dosearch = 0;
2819 if (dosearch) { /* Look in '.' first. */
fe2774ed 2820 const char *cur = scriptname;
491527d0
GS		 2821#ifdef SEARCH_EXTS
2822 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2823 while (ext[i])
2824 if (strEQ(ext[i++],curext)) {
2825 extidx = -1; /* already has an ext */
2826 break;
2827 }
2828 do {
2829#endif
2830 DEBUG_p(PerlIO_printf(Perl_debug_log,
2831 "Looking for %s\n",cur));
017f25f1
IZ		 2832 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2833 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 2834 dosearch = 0;
2835 scriptname = cur;
2836#ifdef SEARCH_EXTS
2837 break;
2838#endif
2839 }
2840#ifdef SEARCH_EXTS
2841 if (cur == scriptname) {
2842 len = strlen(scriptname);
84486fc6 2843 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2844 break;
490a0e98 2845 /* FIXME? Convert to memcpy */
84486fc6 2846 cur = strcpy(tmpbuf, scriptname);
491527d0
GS		 2847 }
2848 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2849 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS		 2850#endif
2851 }
2852#endif
2853
cd39f2b6
JH		 2854#ifdef MACOS_TRADITIONAL
2855 if (dosearch && !strchr(scriptname, ':') &&
2856 (s = PerlEnv_getenv("Commands")))
2857#else
491527d0
GS		 2858 if (dosearch && !strchr(scriptname, '/')
2859#ifdef DOSISH
2860 && !strchr(scriptname, '\\')
2861#endif
cd39f2b6
JH		 2862 && (s = PerlEnv_getenv("PATH")))
2863#endif
2864 {
491527d0 2865 bool seen_dot = 0;
92f0c265 2866
3280af22
NIS		 2867 PL_bufend = s + strlen(s);
2868 while (s < PL_bufend) {
cd39f2b6
JH		 2869#ifdef MACOS_TRADITIONAL
2870 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2871 ',',
2872 &len);
2873#else
491527d0
GS		 2874#if defined(atarist) || defined(DOSISH)
2875 for (len = 0; *s
2876# ifdef atarist
2877 && *s != ','
2878# endif
2879 && *s != ';'; len++, s++) {
84486fc6
GS		 2880 if (len < sizeof tmpbuf)
2881 tmpbuf[len] = *s;
491527d0 2882 }
84486fc6
GS		 2883 if (len < sizeof tmpbuf)
2884 tmpbuf[len] = '\0';
491527d0 2885#else /* ! (atarist || DOSISH) */
3280af22 2886 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 2887 ':',
2888 &len);
2889#endif /* ! (atarist || DOSISH) */
cd39f2b6 2890#endif /* MACOS_TRADITIONAL */
3280af22 2891 if (s < PL_bufend)
491527d0 2892 s++;
84486fc6 2893 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 2894 continue; /* don't search dir with too-long name */
cd39f2b6
JH		 2895#ifdef MACOS_TRADITIONAL
2896 if (len && tmpbuf[len - 1] != ':')
2897 tmpbuf[len++] = ':';
2898#else
491527d0 2899 if (len
490a0e98 2900# if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 2901 && tmpbuf[len - 1] != '/'
2902 && tmpbuf[len - 1] != '\\'
490a0e98 2903# endif
491527d0 2904 )
84486fc6
GS		 2905 tmpbuf[len++] = '/';
2906 if (len == 2 && tmpbuf[0] == '.')
491527d0 2907 seen_dot = 1;
cd39f2b6 2908#endif
490a0e98
NC		 2909 /* FIXME? Convert to memcpy by storing previous strlen(scriptname)
2910 */
84486fc6 2911 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS		 2912#endif /* !VMS */
2913
2914#ifdef SEARCH_EXTS
84486fc6 2915 len = strlen(tmpbuf);
491527d0
GS		 2916 if (extidx > 0) /* reset after previous loop */
2917 extidx = 0;
2918 do {
2919#endif
84486fc6 2920 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 2921 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 2922 if (S_ISDIR(PL_statbuf.st_mode)) {
2923 retval = -1;
2924 }
491527d0
GS		 2925#ifdef SEARCH_EXTS
2926 } while ( retval < 0 /* not there */
2927 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 2928 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS		 2929 );
2930#endif
2931 if (retval < 0)
2932 continue;
3280af22
NIS		 2933 if (S_ISREG(PL_statbuf.st_mode)
2934 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 2935#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 2936 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 2937#endif
2938 )
2939 {
3aed30dc 2940 xfound = tmpbuf; /* bingo! */
491527d0
GS		 2941 break;
2942 }
2943 if (!xfailed)
84486fc6 2944 xfailed = savepv(tmpbuf);
491527d0
GS		 2945 }
2946#ifndef DOSISH
017f25f1 2947 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 2948 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 2949 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 2950#endif
2951 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 2952 if (!xfound) {
2953 if (flags & 1) { /* do or die? */
3aed30dc 2954 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 2955 (xfailed ? "execute" : "find"),
2956 (xfailed ? xfailed : scriptname),
2957 (xfailed ? "" : " on PATH"),
2958 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2959 }
2960 scriptname = Nullch;
2961 }
43c5f42d 2962 Safefree(xfailed);
491527d0
GS		 2963 scriptname = xfound;
2964 }
9ccb31f9 2965 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS		 2966}
2967
ba869deb
GS		 2968#ifndef PERL_GET_CONTEXT_DEFINED
2969
2970void *
2971Perl_get_context(void)
2972{
27da23d5 2973 dVAR;
3db8f154 2974#if defined(USE_ITHREADS)
ba869deb
GS		 2975# ifdef OLD_PTHREADS_API
2976 pthread_addr_t t;
2977 if (pthread_getspecific(PL_thr_key, &t))
2978 Perl_croak_nocontext("panic: pthread_getspecific");
2979 return (void*)t;
2980# else
bce813aa 2981# ifdef I_MACH_CTHREADS
8b8b35ab 2982 return (void*)cthread_data(cthread_self());
bce813aa 2983# else
8b8b35ab
JH		 2984 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
2985# endif
c44d3fdb 2986# endif
ba869deb
GS		 2987#else
2988 return (void*)NULL;
2989#endif
2990}
2991
2992void
2993Perl_set_context(void *t)
2994{
8772537c 2995 dVAR;
3db8f154 2996#if defined(USE_ITHREADS)
c44d3fdb
GS		 2997# ifdef I_MACH_CTHREADS
2998 cthread_set_data(cthread_self(), t);
2999# else
ba869deb
GS		 3000 if (pthread_setspecific(PL_thr_key, t))
3001 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3002# endif
b464bac0 3003#else
8772537c 3004 PERL_UNUSED_ARG(t);
ba869deb
GS		 3005#endif
3006}
3007
3008#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3009
27da23d5 3010#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3011struct perl_vars *
864dbfa3 3012Perl_GetVars(pTHX)
22239a37 3013{
533c011a 3014 return &PL_Vars;
22239a37 3015}
31fb1209
NIS		 3016#endif
3017
1cb0ed9b 3018char **
864dbfa3 3019Perl_get_op_names(pTHX)
31fb1209 3020{
27da23d5 3021 return (char **)PL_op_name;
31fb1209
NIS		 3022}
3023
1cb0ed9b 3024char **
864dbfa3 3025Perl_get_op_descs(pTHX)
31fb1209 3026{
27da23d5 3027 return (char **)PL_op_desc;
31fb1209 3028}
9e6b2b00 3029
e1ec3a88 3030const char *
864dbfa3 3031Perl_get_no_modify(pTHX)
9e6b2b00 3032{
e1ec3a88 3033 return PL_no_modify;
9e6b2b00
GS		 3034}
3035
3036U32 *
864dbfa3 3037Perl_get_opargs(pTHX)
9e6b2b00 3038{
27da23d5 3039 return (U32 *)PL_opargs;
9e6b2b00 3040}
51aa15f3 3041
0cb96387
GS		 3042PPADDR_t*
3043Perl_get_ppaddr(pTHX)
3044{
27da23d5 3045 dVAR;
12ae5dfc 3046 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS		 3047}
3048
a6c40364
GS		 3049#ifndef HAS_GETENV_LEN
3050char *
bf4acbe4 3051Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3052{
8772537c 3053 char * const env_trans = PerlEnv_getenv(env_elem);
a6c40364
GS		 3054 if (env_trans)
3055 *len = strlen(env_trans);
3056 return env_trans;
f675dbe5
CB		 3057}
3058#endif
3059
dc9e4912
GS		 3060
3061MGVTBL*
864dbfa3 3062Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3063{
27da23d5 3064 const MGVTBL* result = Null(MGVTBL*);
dc9e4912
GS		 3065
3066 switch(vtbl_id) {
3067 case want_vtbl_sv:
3068 result = &PL_vtbl_sv;
3069 break;
3070 case want_vtbl_env:
3071 result = &PL_vtbl_env;
3072 break;
3073 case want_vtbl_envelem:
3074 result = &PL_vtbl_envelem;
3075 break;
3076 case want_vtbl_sig:
3077 result = &PL_vtbl_sig;
3078 break;
3079 case want_vtbl_sigelem:
3080 result = &PL_vtbl_sigelem;
3081 break;
3082 case want_vtbl_pack:
3083 result = &PL_vtbl_pack;
3084 break;
3085 case want_vtbl_packelem:
3086 result = &PL_vtbl_packelem;
3087 break;
3088 case want_vtbl_dbline:
3089 result = &PL_vtbl_dbline;
3090 break;
3091 case want_vtbl_isa:
3092 result = &PL_vtbl_isa;
3093 break;
3094 case want_vtbl_isaelem:
3095 result = &PL_vtbl_isaelem;
3096 break;
3097 case want_vtbl_arylen:
3098 result = &PL_vtbl_arylen;
3099 break;
3100 case want_vtbl_glob:
3101 result = &PL_vtbl_glob;
3102 break;
3103 case want_vtbl_mglob:
3104 result = &PL_vtbl_mglob;
3105 break;
3106 case want_vtbl_nkeys:
3107 result = &PL_vtbl_nkeys;
3108 break;
3109 case want_vtbl_taint:
3110 result = &PL_vtbl_taint;
3111 break;
3112 case want_vtbl_substr:
3113 result = &PL_vtbl_substr;
3114 break;
3115 case want_vtbl_vec:
3116 result = &PL_vtbl_vec;
3117 break;
3118 case want_vtbl_pos:
3119 result = &PL_vtbl_pos;
3120 break;
3121 case want_vtbl_bm:
3122 result = &PL_vtbl_bm;
3123 break;
3124 case want_vtbl_fm:
3125 result = &PL_vtbl_fm;
3126 break;
3127 case want_vtbl_uvar:
3128 result = &PL_vtbl_uvar;
3129 break;
dc9e4912
GS		 3130 case want_vtbl_defelem:
3131 result = &PL_vtbl_defelem;
3132 break;
3133 case want_vtbl_regexp:
3134 result = &PL_vtbl_regexp;
3135 break;
3136 case want_vtbl_regdata:
3137 result = &PL_vtbl_regdata;
3138 break;
3139 case want_vtbl_regdatum:
3140 result = &PL_vtbl_regdatum;
3141 break;
3c90161d 3142#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3143 case want_vtbl_collxfrm:
3144 result = &PL_vtbl_collxfrm;
3145 break;
3c90161d 3146#endif
dc9e4912
GS		 3147 case want_vtbl_amagic:
3148 result = &PL_vtbl_amagic;
3149 break;
3150 case want_vtbl_amagicelem:
3151 result = &PL_vtbl_amagicelem;
3152 break;
810b8aa5
GS		 3153 case want_vtbl_backref:
3154 result = &PL_vtbl_backref;
3155 break;
7e8c5dac
HS		 3156 case want_vtbl_utf8:
3157 result = &PL_vtbl_utf8;
3158 break;
dc9e4912 3159 }
27da23d5 3160 return (MGVTBL*)result;
dc9e4912
GS		 3161}
3162
767df6a1 3163I32
864dbfa3 3164Perl_my_fflush_all(pTHX)
767df6a1 3165{
f800e14d 3166#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3167 return PerlIO_flush(NULL);
767df6a1 3168#else
8fbdfb7c 3169# if defined(HAS__FWALK)
f13a2bc0 3170 extern int fflush(FILE *);
74cac757
JH		 3171 /* undocumented, unprototyped, but very useful BSDism */
3172 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3173 _fwalk(&fflush);
74cac757 3174 return 0;
8fa7f367 3175# else
8fbdfb7c 3176# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3177 long open_max = -1;
8fbdfb7c 3178# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3179 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3180# else
8fa7f367 3181# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3182 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH		 3183# else
3184# ifdef FOPEN_MAX
74cac757 3185 open_max = FOPEN_MAX;
8fa7f367
JH		 3186# else
3187# ifdef OPEN_MAX
74cac757 3188 open_max = OPEN_MAX;
8fa7f367
JH		 3189# else
3190# ifdef _NFILE
d2201af2 3191 open_max = _NFILE;
8fa7f367
JH		 3192# endif
3193# endif
74cac757 3194# endif
767df6a1
JH		 3195# endif
3196# endif
767df6a1
JH		 3197 if (open_max > 0) {
3198 long i;
3199 for (i = 0; i < open_max; i++)
d2201af2
AD		 3200 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3201 STDIO_STREAM_ARRAY[i]._file < open_max &&
3202 STDIO_STREAM_ARRAY[i]._flag)
3203 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3204 return 0;
3205 }
8fbdfb7c 3206# endif
93189314 3207 SETERRNO(EBADF,RMS_IFI);
767df6a1 3208 return EOF;
74cac757 3209# endif
767df6a1
JH		 3210#endif
3211}
097ee67d 3212
69282e91 3213void
e1ec3a88 3214Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
bc37a18f 3215{
e1ec3a88 3216 const char *func =
66fc2fa5
JH		 3217 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3218 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
bc37a18f 3219 PL_op_desc[op];
e1ec3a88
AL		 3220 const char *pars = OP_IS_FILETEST(op) ? "" : "()";
3221 const char *type = OP_IS_SOCKET(op)
3aed30dc
HS		 3222 || (gv && io && IoTYPE(io) == IoTYPE_SOCKET)
3223 ? "socket" : "filehandle";
e1ec3a88 3224 const char *name = NULL;
bc37a18f 3225
66fc2fa5 3226 if (gv && isGV(gv)) {
f62cb720 3227 name = GvENAME(gv);
66fc2fa5
JH		 3228 }
3229
4c80c0b2 3230 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3aed30dc 3231 if (ckWARN(WARN_IO)) {
fd322ea4 3232 const char *direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out";
3aed30dc
HS		 3233 if (name && *name)
3234 Perl_warner(aTHX_ packWARN(WARN_IO),
3235 "Filehandle %s opened only for %sput",
fd322ea4 3236 name, direction);
3aed30dc
HS		 3237 else
3238 Perl_warner(aTHX_ packWARN(WARN_IO),
fd322ea4 3239 "Filehandle opened only for %sput", direction);
3aed30dc 3240 }
2dd78f96
JH		 3241 }
3242 else {
e1ec3a88 3243 const char *vile;
3aed30dc
HS		 3244 I32 warn_type;
3245
3246 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3247 vile = "closed";
3248 warn_type = WARN_CLOSED;
3249 }
3250 else {
3251 vile = "unopened";
3252 warn_type = WARN_UNOPENED;
3253 }
3254
3255 if (ckWARN(warn_type)) {
3256 if (name && *name) {
3257 Perl_warner(aTHX_ packWARN(warn_type),
3258 "%s%s on %s %s %s", func, pars, vile, type, name);
3259 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3260 Perl_warner(
3261 aTHX_ packWARN(warn_type),
3262 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3263 func, pars, name
3264 );
3265 }
3266 else {
3267 Perl_warner(aTHX_ packWARN(warn_type),
3268 "%s%s on %s %s", func, pars, vile, type);
3269 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3270 Perl_warner(
3271 aTHX_ packWARN(warn_type),
3272 "\t(Are you trying to call %s%s on dirhandle?)\n",
3273 func, pars
3274 );
3275 }
3276 }
bc37a18f 3277 }
69282e91 3278}
a926ef6b
JH		 3279
3280#ifdef EBCDIC
cbebf344
JH		 3281/* in ASCII order, not that it matters */
3282static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3283
a926ef6b
JH		 3284int
3285Perl_ebcdic_control(pTHX_ int ch)
3286{
3aed30dc 3287 if (ch > 'a') {
e1ec3a88 3288 const char *ctlp;
3aed30dc
HS		 3289
3290 if (islower(ch))
3291 ch = toupper(ch);
3292
3293 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3294 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
a926ef6b 3295 }
3aed30dc
HS		 3296
3297 if (ctlp == controllablechars)
3298 return('\177'); /* DEL */
3299 else
3300 return((unsigned char)(ctlp - controllablechars - 1));
3301 } else { /* Want uncontrol */
3302 if (ch == '\177' || ch == -1)
3303 return('?');
3304 else if (ch == '\157')
3305 return('\177');
3306 else if (ch == '\174')
3307 return('\000');
3308 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3309 return('\036');
3310 else if (ch == '\155')
3311 return('\037');
3312 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3313 return(controllablechars[ch+1]);
3314 else
3315 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3316 }
a926ef6b
JH		 3317}
3318#endif
e72cf795 3319
f6adc668 3320/* To workaround core dumps from the uninitialised tm_zone we get the
e72cf795
JH		 3321 * system to give us a reasonable struct to copy. This fix means that
3322 * strftime uses the tm_zone and tm_gmtoff values returned by
3323 * localtime(time()). That should give the desired result most of the
3324 * time. But probably not always!
3325 *
f6adc668
JH		 3326 * This does not address tzname aspects of NETaa14816.
3327 *
e72cf795 3328 */
f6adc668 3329
e72cf795
JH		 3330#ifdef HAS_GNULIBC
3331# ifndef STRUCT_TM_HASZONE
3332# define STRUCT_TM_HASZONE
3333# endif
3334#endif
3335
f6adc668
JH		 3336#ifdef STRUCT_TM_HASZONE /* Backward compat */
3337# ifndef HAS_TM_TM_ZONE
3338# define HAS_TM_TM_ZONE
3339# endif
3340#endif
3341
e72cf795 3342void
f1208910 3343Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795 3344{
f6adc668 3345#ifdef HAS_TM_TM_ZONE
e72cf795 3346 Time_t now;
1b6737cc 3347 const struct tm* my_tm;
e72cf795 3348 (void)time(&now);
82c57498 3349 my_tm = localtime(&now);
ca46b8ee
SP		 3350 if (my_tm)
3351 Copy(my_tm, ptm, 1, struct tm);
1b6737cc
AL		 3352#else
3353 PERL_UNUSED_ARG(ptm);
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