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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
PP
28#ifndef SIG_ERR
29# define SIG_ERR ((Sighandler_t) -1)
30#endif
64ca3a65 31#endif
36477c24 32
172d2248
OS
33#ifdef __Lynx__
34/* Missing protos on LynxOS */
35int putenv(char *);
36#endif
37
ff68c719
PP
38#ifdef I_SYS_WAIT
39# include <sys/wait.h>
40#endif
41
868439a2
JH
42#ifdef HAS_SELECT
43# ifdef I_SYS_SELECT
44# include <sys/select.h>
45# endif
46#endif
47
8d063cd8 48#define FLUSH
8d063cd8 49
16cebae2
GS
50#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
51# define FD_CLOEXEC 1 /* NeXT needs this */
52#endif
53
a687059c
LW
54/* NOTE: Do not call the next three routines directly. Use the macros
55 * in handy.h, so that we can easily redefine everything to do tracking of
56 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 57 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW
58 */
59
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
PP
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
PP
182 if (ptr != Nullch) {
183 memset((void*)ptr, 0, size);
184 return ptr;
185 }
3280af22 186 else if (PL_nomemok)
1050c9ca
PP
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
PP
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
PP
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
PP
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
PP
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;
79072805 369 register U32 i;
0b71040e 370 STRLEN len;
79072805
LW
371 I32 rarest = 0;
372 U32 frequency = 256;
373
c517dc2b 374 if (flags & FBMcf_TAIL) {
890ce7af 375 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
cf93c79d 376 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
c517dc2b
JH
377 if (mg && mg->mg_len >= 0)
378 mg->mg_len++;
379 }
9cbe880b 380 s = (U8*)SvPV_force_mutable(sv, len);
862a34c6 381 SvUPGRADE(sv, SVt_PVBM);
d1be9408 382 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 383 return;
02128f11 384 if (len > 2) {
9cbe880b 385 const unsigned char *sb;
66a1b24b 386 const U8 mlen = (len>255) ? 255 : (U8)len;
890ce7af 387 register U8 *table;
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
PP
685 if (big[pos] != first)
686 continue;
687 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69
PP
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
PP
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
PP
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;
a02a5408 767 Newx(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
a02a5408 791 Newx(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 845 ++len;
a02a5408 846 Newx(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
PP
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 */
a02a5408
JC
866 Newx(sv, 1, SV);
867 Newxz(any, 1, XPVMG);
fc36a67e
PP
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
PP
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{
2d03de9c 924 SV * const sv = mess_alloc();
c5be433b 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() */
890ce7af 1077 SV * const olddiehook = PL_diehook;
63315e18
NC
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) {
890ce7af 1119 SV * const msv = vmess(pat, args);
e07360fa
AT
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
890ce7af 1154 message = vdie_croak_common(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
PP
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
PP
1278 SV *msg;
1279
1280 ENTER;
c5be5b4d
DM
1281 SAVESPTR(PL_warnhook);
1282 PL_warnhook = Nullsv;
3a1f2dc9 1283 save_re_context();
06bf62c7 1284 msg = newSVpvn(message, msglen);
ff882698 1285 SvFLAGS(msg) |= utf8;
774d564b
PP
1286 SvREADONLY_on(msg);
1287 SAVEFREESV(msg);
1288
e788e7d3 1289 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1290 PUSHMARK(SP);
774d564b 1291 XPUSHs(msg);
20cec16a 1292 PUTBACK;
864dbfa3 1293 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1294 POPSTACK;
774d564b 1295 LEAVE;
20cec16a
PP
1296 return;
1297 }
748a9306 1298 }
87582a92 1299
7ff03255 1300 write_to_stderr(message, msglen);
a687059c 1301}
8d063cd8 1302
c5be433b 1303#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1304void
1305Perl_warn_nocontext(const char *pat, ...)
1306{
1307 dTHX;
1308 va_list args;
1309 va_start(args, pat);
c5be433b 1310 vwarn(pat, &args);
cea2e8a9
GS
1311 va_end(args);
1312}
1313#endif /* PERL_IMPLICIT_CONTEXT */
1314
954c1994
GS
1315/*
1316=for apidoc warn
1317
966353fd
MF
1318This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1319function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS
1320
1321=cut
1322*/
1323
cea2e8a9
GS
1324void
1325Perl_warn(pTHX_ const char *pat, ...)
1326{
1327 va_list args;
1328 va_start(args, pat);
c5be433b 1329 vwarn(pat, &args);
cea2e8a9
GS
1330 va_end(args);
1331}
1332
c5be433b
GS
1333#if defined(PERL_IMPLICIT_CONTEXT)
1334void
1335Perl_warner_nocontext(U32 err, const char *pat, ...)
1336{
27da23d5 1337 dTHX;
c5be433b
GS
1338 va_list args;
1339 va_start(args, pat);
1340 vwarner(err, pat, &args);
1341 va_end(args);
1342}
1343#endif /* PERL_IMPLICIT_CONTEXT */
1344
599cee73 1345void
864dbfa3 1346Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM
1347{
1348 va_list args;
c5be433b
GS
1349 va_start(args, pat);
1350 vwarner(err, pat, &args);
1351 va_end(args);
1352}
1353
1354void
1355Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1356{
27da23d5 1357 dVAR;
d13b0d77 1358 if (ckDEAD(err)) {
a3b680e6 1359 SV * const msv = vmess(pat, args);
d13b0d77 1360 STRLEN msglen;
cfd0369c 1361 const char *message = SvPV_const(msv, msglen);
a3b680e6 1362 const I32 utf8 = SvUTF8(msv);
599cee73 1363
3aed30dc 1364 if (PL_diehook) {
63315e18
NC
1365 assert(message);
1366 S_vdie_common(aTHX_ message, msglen, utf8);
3aed30dc
HS
1367 }
1368 if (PL_in_eval) {
1369 PL_restartop = die_where(message, msglen);
ff882698 1370 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS
1371 JMPENV_JUMP(3);
1372 }
7ff03255 1373 write_to_stderr(message, msglen);
3aed30dc 1374 my_failure_exit();
599cee73
PM
1375 }
1376 else {
d13b0d77 1377 Perl_vwarn(aTHX_ pat, args);
599cee73
PM
1378 }
1379}
1380
f54ba1c2
DM
1381/* implements the ckWARN? macros */
1382
1383bool
1384Perl_ckwarn(pTHX_ U32 w)
1385{
1386 return
1387 (
1388 isLEXWARN_on
1389 && PL_curcop->cop_warnings != pWARN_NONE
1390 && (
1391 PL_curcop->cop_warnings == pWARN_ALL
1392 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1393 || (unpackWARN2(w) &&
1394 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1395 || (unpackWARN3(w) &&
1396 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1397 || (unpackWARN4(w) &&
1398 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1399 )
1400 )
1401 ||
1402 (
1403 isLEXWARN_off && PL_dowarn & G_WARN_ON
1404 )
1405 ;
1406}
1407
1408/* implements the ckWARN?_d macro */
1409
1410bool
1411Perl_ckwarn_d(pTHX_ U32 w)
1412{
1413 return
1414 isLEXWARN_off
1415 || PL_curcop->cop_warnings == pWARN_ALL
1416 || (
1417 PL_curcop->cop_warnings != pWARN_NONE
1418 && (
1419 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1420 || (unpackWARN2(w) &&
1421 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1422 || (unpackWARN3(w) &&
1423 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1424 || (unpackWARN4(w) &&
1425 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1426 )
1427 )
1428 ;
1429}
1430
1431
1432
e6587932
DM
1433/* since we've already done strlen() for both nam and val
1434 * we can use that info to make things faster than
1435 * sprintf(s, "%s=%s", nam, val)
1436 */
1437#define my_setenv_format(s, nam, nlen, val, vlen) \
1438 Copy(nam, s, nlen, char); \
1439 *(s+nlen) = '='; \
1440 Copy(val, s+(nlen+1), vlen, char); \
1441 *(s+(nlen+1+vlen)) = '\0'
1442
13b6e58c 1443#ifdef USE_ENVIRON_ARRAY
eccd403f 1444 /* VMS' my_setenv() is in vms.c */
2986a63f 1445#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1446void
e1ec3a88 1447Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1448{
27da23d5 1449 dVAR;
4efc5df6
GS
1450#ifdef USE_ITHREADS
1451 /* only parent thread can modify process environment */
1452 if (PL_curinterp == aTHX)
1453#endif
1454 {
f2517201 1455#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1456 if (!PL_use_safe_putenv) {
f2517201 1457 /* most putenv()s leak, so we manipulate environ directly */
79072805 1458 register I32 i=setenv_getix(nam); /* where does it go? */
e6587932 1459 int nlen, vlen;
8d063cd8 1460
3280af22 1461 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW
1462 I32 j;
1463 I32 max;
fe14fcc3
LW
1464 char **tmpenv;
1465
1466 for (max = i; environ[max]; max++) ;
f2517201
GS
1467 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1468 for (j=0; j<max; j++) { /* copy environment */
e1ec3a88 1469 const int len = strlen(environ[j]);
3aed30dc
HS
1470 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1471 Copy(environ[j], tmpenv[j], len+1, char);
f2517201 1472 }
fe14fcc3
LW
1473 tmpenv[max] = Nullch;
1474 environ = tmpenv; /* tell exec where it is now */
1475 }
a687059c 1476 if (!val) {
f2517201 1477 safesysfree(environ[i]);
a687059c
LW
1478 while (environ[i]) {
1479 environ[i] = environ[i+1];
1480 i++;
1481 }
1482 return;
1483 }
8d063cd8 1484 if (!environ[i]) { /* does not exist yet */
f2517201 1485 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW
1486 environ[i+1] = Nullch; /* make sure it's null terminated */
1487 }
fe14fcc3 1488 else
f2517201 1489 safesysfree(environ[i]);
e6587932
DM
1490 nlen = strlen(nam);
1491 vlen = strlen(val);
f2517201 1492
e6587932
DM
1493 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1494 /* all that work just for this */
1495 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95
MS
1496 } else {
1497# endif
27da23d5 1498# if defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
47dafe4d
FE
1499 setenv(nam, val, 1);
1500# else
f2517201 1501 char *new_env;
53c1dcc0
AL
1502 const int nlen = strlen(nam);
1503 int vlen;
e6587932 1504 if (!val) {
3aed30dc 1505 val = "";
e6587932
DM
1506 }
1507 vlen = strlen(val);
1508 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1509 /* all that work just for this */
1510 my_setenv_format(new_env, nam, nlen, val, vlen);
f2517201 1511 (void)putenv(new_env);
47dafe4d 1512# endif /* __CYGWIN__ */
50acdf95
MS
1513#ifndef PERL_USE_SAFE_PUTENV
1514 }
1515#endif
4efc5df6 1516 }
8d063cd8
LW
1517}
1518
2986a63f 1519#else /* WIN32 || NETWARE */
68dc0745
PP
1520
1521void
72229eff 1522Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1523{
27da23d5 1524 dVAR;
ac5c734f 1525 register char *envstr;
e1ec3a88
AL
1526 const int nlen = strlen(nam);
1527 int vlen;
e6587932 1528
ac5c734f
GS
1529 if (!val) {
1530 val = "";
1531 }
e6587932 1532 vlen = strlen(val);
a02a5408 1533 Newx(envstr, nlen+vlen+2, char);
e6587932 1534 my_setenv_format(envstr, nam, nlen, val, vlen);
ac5c734f
GS
1535 (void)PerlEnv_putenv(envstr);
1536 Safefree(envstr);
3e3baf6d
TB
1537}
1538
2986a63f 1539#endif /* WIN32 || NETWARE */
3e3baf6d 1540
2f42fcb0 1541#ifndef PERL_MICRO
3e3baf6d 1542I32
e1ec3a88 1543Perl_setenv_getix(pTHX_ const char *nam)
3e3baf6d 1544{
53c1dcc0
AL
1545 register I32 i;
1546 const register I32 len = strlen(nam);
3e3baf6d
TB
1547
1548 for (i = 0; environ[i]; i++) {
1549 if (
1550#ifdef WIN32
1551 strnicmp(environ[i],nam,len) == 0
1552#else
1553 strnEQ(environ[i],nam,len)
1554#endif
1555 && environ[i][len] == '=')
1556 break; /* strnEQ must come first to avoid */
1557 } /* potential SEGV's */
1558 return i;
68dc0745 1559}
2f42fcb0 1560#endif /* !PERL_MICRO */
68dc0745 1561
ed79a026 1562#endif /* !VMS && !EPOC*/
378cc40b 1563
16d20bd9 1564#ifdef UNLINK_ALL_VERSIONS
79072805 1565I32
6e732051 1566Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 1567{
79072805 1568 I32 i;
378cc40b 1569
6ad3d225 1570 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW
1571 return i ? 0 : -1;
1572}
1573#endif
1574
7a3f2258 1575/* this is a drop-in replacement for bcopy() */
2253333f 1576#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1577char *
7a3f2258 1578Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b 1579{
2d03de9c 1580 char * const retval = to;
378cc40b 1581
7c0587c8
LW
1582 if (from - to >= 0) {
1583 while (len--)
1584 *to++ = *from++;
1585 }
1586 else {
1587 to += len;
1588 from += len;
1589 while (len--)
faf8582f 1590 *(--to) = *(--from);
7c0587c8 1591 }
378cc40b
LW
1592 return retval;
1593}
ffed7fef 1594#endif
378cc40b 1595
7a3f2258 1596/* this is a drop-in replacement for memset() */
fc36a67e
PP
1597#ifndef HAS_MEMSET
1598void *
7a3f2258 1599Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1600{
2d03de9c 1601 char * const retval = loc;
fc36a67e
PP
1602
1603 while (len--)
1604 *loc++ = ch;
1605 return retval;
1606}
1607#endif
1608
7a3f2258 1609/* this is a drop-in replacement for bzero() */
7c0587c8 1610#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1611char *
7a3f2258 1612Perl_my_bzero(register char *loc, register I32 len)
378cc40b 1613{
2d03de9c 1614 char * const retval = loc;
378cc40b
LW
1615
1616 while (len--)
1617 *loc++ = 0;
1618 return retval;
1619}
1620#endif
7c0587c8 1621
7a3f2258 1622/* this is a drop-in replacement for memcmp() */
36477c24 1623#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1624I32
7a3f2258 1625Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1626{
e1ec3a88
AL
1627 register const U8 *a = (const U8 *)s1;
1628 register const U8 *b = (const U8 *)s2;
79072805 1629 register I32 tmp;
7c0587c8
LW
1630
1631 while (len--) {
27da23d5 1632 if ((tmp = *a++ - *b++))
7c0587c8
LW
1633 return tmp;
1634 }
1635 return 0;
1636}
36477c24 1637#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1638
fe14fcc3 1639#ifndef HAS_VPRINTF
a687059c 1640
85e6fe83 1641#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1642char *
1643#else
1644int
1645#endif
08105a92 1646vsprintf(char *dest, const char *pat, char *args)
a687059c
LW
1647{
1648 FILE fakebuf;
1649
1650 fakebuf._ptr = dest;
1651 fakebuf._cnt = 32767;
35c8bce7
LW
1652#ifndef _IOSTRG
1653#define _IOSTRG 0
1654#endif
a687059c
LW
1655 fakebuf._flag = _IOWRT|_IOSTRG;
1656 _doprnt(pat, args, &fakebuf); /* what a kludge */
1657 (void)putc('\0', &fakebuf);
85e6fe83 1658#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1659 return(dest);
1660#else
1661 return 0; /* perl doesn't use return value */
1662#endif
1663}
1664
fe14fcc3 1665#endif /* HAS_VPRINTF */
a687059c
LW
1666
1667#ifdef MYSWAP
ffed7fef 1668#if BYTEORDER != 0x4321
a687059c 1669short
864dbfa3 1670Perl_my_swap(pTHX_ short s)
a687059c
LW
1671{
1672#if (BYTEORDER & 1) == 0
1673 short result;
1674
1675 result = ((s & 255) << 8) + ((s >> 8) & 255);
1676 return result;
1677#else
1678 return s;
1679#endif
1680}
1681
1682long
864dbfa3 1683Perl_my_htonl(pTHX_ long l)
a687059c
LW
1684{
1685 union {
1686 long result;
ffed7fef 1687 char c[sizeof(long)];
a687059c
LW
1688 } u;
1689
ffed7fef 1690#if BYTEORDER == 0x1234
a687059c
LW
1691 u.c[0] = (l >> 24) & 255;
1692 u.c[1] = (l >> 16) & 255;
1693 u.c[2] = (l >> 8) & 255;
1694 u.c[3] = l & 255;
1695 return u.result;
1696#else
ffed7fef 1697#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1698 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1699#else
79072805
LW
1700 register I32 o;
1701 register I32 s;
a687059c 1702
ffed7fef
LW
1703 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1704 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW
1705 }
1706 return u.result;
1707#endif
1708#endif
1709}
1710
1711long
864dbfa3 1712Perl_my_ntohl(pTHX_ long l)
a687059c
LW
1713{
1714 union {
1715 long l;
ffed7fef 1716 char c[sizeof(long)];
a687059c
LW
1717 } u;
1718
ffed7fef 1719#if BYTEORDER == 0x1234
a687059c
LW
1720 u.c[0] = (l >> 24) & 255;
1721 u.c[1] = (l >> 16) & 255;
1722 u.c[2] = (l >> 8) & 255;
1723 u.c[3] = l & 255;
1724 return u.l;
1725#else
ffed7fef 1726#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1727 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1728#else
79072805
LW
1729 register I32 o;
1730 register I32 s;
a687059c
LW
1731
1732 u.l = l;
1733 l = 0;
ffed7fef
LW
1734 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1735 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW
1736 }
1737 return l;
1738#endif
1739#endif
1740}
1741
ffed7fef 1742#endif /* BYTEORDER != 0x4321 */
988174c1
LW
1743#endif /* MYSWAP */
1744
1745/*
1746 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1747 * If these functions are defined,
1748 * the BYTEORDER is neither 0x1234 nor 0x4321.
1749 * However, this is not assumed.
1750 * -DWS
1751 */
1752
1109a392 1753#define HTOLE(name,type) \
988174c1 1754 type \
ba106d47 1755 name (register type n) \
988174c1
LW
1756 { \
1757 union { \
1758 type value; \
1759 char c[sizeof(type)]; \
1760 } u; \
79072805 1761 register I32 i; \
1109a392
MHM
1762 register I32 s = 0; \
1763 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW
1764 u.c[i] = (n >> s) & 0xFF; \
1765 } \
1766 return u.value; \
1767 }
1768
1109a392 1769#define LETOH(name,type) \
988174c1 1770 type \
ba106d47 1771 name (register type n) \
988174c1
LW
1772 { \
1773 union { \
1774 type value; \
1775 char c[sizeof(type)]; \
1776 } u; \
79072805 1777 register I32 i; \
1109a392 1778 register I32 s = 0; \
988174c1
LW
1779 u.value = n; \
1780 n = 0; \
1109a392
MHM
1781 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1782 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW
1783 } \
1784 return n; \
1785 }
1786
1109a392
MHM
1787/*
1788 * Big-endian byte order functions.
1789 */
1790
1791#define HTOBE(name,type) \
1792 type \
1793 name (register type n) \
1794 { \
1795 union { \
1796 type value; \
1797 char c[sizeof(type)]; \
1798 } u; \
1799 register I32 i; \
1800 register I32 s = 8*(sizeof(u.c)-1); \
1801 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1802 u.c[i] = (n >> s) & 0xFF; \
1803 } \
1804 return u.value; \
1805 }
1806
1807#define BETOH(name,type) \
1808 type \
1809 name (register type n) \
1810 { \
1811 union { \
1812 type value; \
1813 char c[sizeof(type)]; \
1814 } u; \
1815 register I32 i; \
1816 register I32 s = 8*(sizeof(u.c)-1); \
1817 u.value = n; \
1818 n = 0; \
1819 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1820 n |= ((type)(u.c[i] & 0xFF)) << s; \
1821 } \
1822 return n; \
1823 }
1824
1825/*
1826 * If we just can't do it...
1827 */
1828
1829#define NOT_AVAIL(name,type) \
1830 type \
1831 name (register type n) \
1832 { \
1833 Perl_croak_nocontext(#name "() not available"); \
1834 return n; /* not reached */ \
1835 }
1836
1837
988174c1 1838#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 1839HTOLE(htovs,short)
988174c1
LW
1840#endif
1841#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 1842HTOLE(htovl,long)
988174c1
LW
1843#endif
1844#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 1845LETOH(vtohs,short)
988174c1
LW
1846#endif
1847#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM
1848LETOH(vtohl,long)
1849#endif
1850
1851#ifdef PERL_NEED_MY_HTOLE16
1852# if U16SIZE == 2
1853HTOLE(Perl_my_htole16,U16)
1854# else
1855NOT_AVAIL(Perl_my_htole16,U16)
1856# endif
1857#endif
1858#ifdef PERL_NEED_MY_LETOH16
1859# if U16SIZE == 2
1860LETOH(Perl_my_letoh16,U16)
1861# else
1862NOT_AVAIL(Perl_my_letoh16,U16)
1863# endif
1864#endif
1865#ifdef PERL_NEED_MY_HTOBE16
1866# if U16SIZE == 2
1867HTOBE(Perl_my_htobe16,U16)
1868# else
1869NOT_AVAIL(Perl_my_htobe16,U16)
1870# endif
1871#endif
1872#ifdef PERL_NEED_MY_BETOH16
1873# if U16SIZE == 2
1874BETOH(Perl_my_betoh16,U16)
1875# else
1876NOT_AVAIL(Perl_my_betoh16,U16)
1877# endif
1878#endif
1879
1880#ifdef PERL_NEED_MY_HTOLE32
1881# if U32SIZE == 4
1882HTOLE(Perl_my_htole32,U32)
1883# else
1884NOT_AVAIL(Perl_my_htole32,U32)
1885# endif
1886#endif
1887#ifdef PERL_NEED_MY_LETOH32
1888# if U32SIZE == 4
1889LETOH(Perl_my_letoh32,U32)
1890# else
1891NOT_AVAIL(Perl_my_letoh32,U32)
1892# endif
1893#endif
1894#ifdef PERL_NEED_MY_HTOBE32
1895# if U32SIZE == 4
1896HTOBE(Perl_my_htobe32,U32)
1897# else
1898NOT_AVAIL(Perl_my_htobe32,U32)
1899# endif
1900#endif
1901#ifdef PERL_NEED_MY_BETOH32
1902# if U32SIZE == 4
1903BETOH(Perl_my_betoh32,U32)
1904# else
1905NOT_AVAIL(Perl_my_betoh32,U32)
1906# endif
1907#endif
1908
1909#ifdef PERL_NEED_MY_HTOLE64
1910# if U64SIZE == 8
1911HTOLE(Perl_my_htole64,U64)
1912# else
1913NOT_AVAIL(Perl_my_htole64,U64)
1914# endif
1915#endif
1916#ifdef PERL_NEED_MY_LETOH64
1917# if U64SIZE == 8
1918LETOH(Perl_my_letoh64,U64)
1919# else
1920NOT_AVAIL(Perl_my_letoh64,U64)
1921# endif
1922#endif
1923#ifdef PERL_NEED_MY_HTOBE64
1924# if U64SIZE == 8
1925HTOBE(Perl_my_htobe64,U64)
1926# else
1927NOT_AVAIL(Perl_my_htobe64,U64)
1928# endif
1929#endif
1930#ifdef PERL_NEED_MY_BETOH64
1931# if U64SIZE == 8
1932BETOH(Perl_my_betoh64,U64)
1933# else
1934NOT_AVAIL(Perl_my_betoh64,U64)
1935# endif
988174c1 1936#endif
a687059c 1937
1109a392
MHM
1938#ifdef PERL_NEED_MY_HTOLES
1939HTOLE(Perl_my_htoles,short)
1940#endif
1941#ifdef PERL_NEED_MY_LETOHS
1942LETOH(Perl_my_letohs,short)
1943#endif
1944#ifdef PERL_NEED_MY_HTOBES
1945HTOBE(Perl_my_htobes,short)
1946#endif
1947#ifdef PERL_NEED_MY_BETOHS
1948BETOH(Perl_my_betohs,short)
1949#endif
1950
1951#ifdef PERL_NEED_MY_HTOLEI
1952HTOLE(Perl_my_htolei,int)
1953#endif
1954#ifdef PERL_NEED_MY_LETOHI
1955LETOH(Perl_my_letohi,int)
1956#endif
1957#ifdef PERL_NEED_MY_HTOBEI
1958HTOBE(Perl_my_htobei,int)
1959#endif
1960#ifdef PERL_NEED_MY_BETOHI
1961BETOH(Perl_my_betohi,int)
1962#endif
1963
1964#ifdef PERL_NEED_MY_HTOLEL
1965HTOLE(Perl_my_htolel,long)
1966#endif
1967#ifdef PERL_NEED_MY_LETOHL
1968LETOH(Perl_my_letohl,long)
1969#endif
1970#ifdef PERL_NEED_MY_HTOBEL
1971HTOBE(Perl_my_htobel,long)
1972#endif
1973#ifdef PERL_NEED_MY_BETOHL
1974BETOH(Perl_my_betohl,long)
1975#endif
1976
1977void
1978Perl_my_swabn(void *ptr, int n)
1979{
1980 register char *s = (char *)ptr;
1981 register char *e = s + (n-1);
1982 register char tc;
1983
1984 for (n /= 2; n > 0; s++, e--, n--) {
1985 tc = *s;
1986 *s = *e;
1987 *e = tc;
1988 }
1989}
1990
4a7d1889
NIS
1991PerlIO *
1992Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
1993{
2986a63f 1994#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
1f852d0d
NIS
1995 int p[2];
1996 register I32 This, that;
1997 register Pid_t pid;
1998 SV *sv;
1999 I32 did_pipes = 0;
2000 int pp[2];
2001
2002 PERL_FLUSHALL_FOR_CHILD;
2003 This = (*mode == 'w');
2004 that = !This;
2005 if (PL_tainting) {
2006 taint_env();
2007 taint_proper("Insecure %s%s", "EXEC");
2008 }
2009 if (PerlProc_pipe(p) < 0)
2010 return Nullfp;
2011 /* Try for another pipe pair for error return */
2012 if (PerlProc_pipe(pp) >= 0)
2013 did_pipes = 1;
52e18b1f 2014 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS
2015 if (errno != EAGAIN) {
2016 PerlLIO_close(p[This]);
4e6dfe71 2017 PerlLIO_close(p[that]);
1f852d0d
NIS
2018 if (did_pipes) {
2019 PerlLIO_close(pp[0]);
2020 PerlLIO_close(pp[1]);
2021 }
2022 return Nullfp;
2023 }
2024 sleep(5);
2025 }
2026 if (pid == 0) {
2027 /* Child */
1f852d0d
NIS
2028#undef THIS
2029#undef THAT
2030#define THIS that
2031#define THAT This
1f852d0d
NIS
2032 /* Close parent's end of error status pipe (if any) */
2033 if (did_pipes) {
2034 PerlLIO_close(pp[0]);
2035#if defined(HAS_FCNTL) && defined(F_SETFD)
2036 /* Close error pipe automatically if exec works */
2037 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2038#endif
2039 }
2040 /* Now dup our end of _the_ pipe to right position */
2041 if (p[THIS] != (*mode == 'r')) {
2042 PerlLIO_dup2(p[THIS], *mode == 'r');
2043 PerlLIO_close(p[THIS]);
4e6dfe71
GS
2044 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2045 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2046 }
4e6dfe71
GS
2047 else
2048 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS
2049#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2050 /* No automatic close - do it by hand */
b7953727
JH
2051# ifndef NOFILE
2052# define NOFILE 20
2053# endif
a080fe3d
NIS
2054 {
2055 int fd;
2056
2057 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2058 if (fd != pp[1])
a080fe3d
NIS
2059 PerlLIO_close(fd);
2060 }
1f852d0d
NIS
2061 }
2062#endif
2063 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
2064 PerlProc__exit(1);
2065#undef THIS
2066#undef THAT
2067 }
2068 /* Parent */
52e18b1f 2069 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS
2070 if (did_pipes)
2071 PerlLIO_close(pp[1]);
2072 /* Keep the lower of the two fd numbers */
2073 if (p[that] < p[This]) {
2074 PerlLIO_dup2(p[This], p[that]);
2075 PerlLIO_close(p[This]);
2076 p[This] = p[that];
2077 }
4e6dfe71
GS
2078 else
2079 PerlLIO_close(p[that]); /* close child's end of pipe */
2080
1f852d0d
NIS
2081 LOCK_FDPID_MUTEX;
2082 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2083 UNLOCK_FDPID_MUTEX;
862a34c6 2084 SvUPGRADE(sv,SVt_IV);
45977657 2085 SvIV_set(sv, pid);
1f852d0d
NIS
2086 PL_forkprocess = pid;
2087 /* If we managed to get status pipe check for exec fail */
2088 if (did_pipes && pid > 0) {
2089 int errkid;
2090 int n = 0, n1;
2091
2092 while (n < sizeof(int)) {
2093 n1 = PerlLIO_read(pp[0],
2094 (void*)(((char*)&errkid)+n),
2095 (sizeof(int)) - n);
2096 if (n1 <= 0)
2097 break;
2098 n += n1;
2099 }
2100 PerlLIO_close(pp[0]);
2101 did_pipes = 0;
2102 if (n) { /* Error */
2103 int pid2, status;
8c51524e 2104 PerlLIO_close(p[This]);
1f852d0d
NIS
2105 if (n != sizeof(int))
2106 Perl_croak(aTHX_ "panic: kid popen errno read");
2107 do {
2108 pid2 = wait4pid(pid, &status, 0);
2109 } while (pid2 == -1 && errno == EINTR);
2110 errno = errkid; /* Propagate errno from kid */
2111 return Nullfp;
2112 }
2113 }
2114 if (did_pipes)
2115 PerlLIO_close(pp[0]);
2116 return PerlIO_fdopen(p[This], mode);
2117#else
4a7d1889
NIS
2118 Perl_croak(aTHX_ "List form of piped open not implemented");
2119 return (PerlIO *) NULL;
1f852d0d 2120#endif
4a7d1889
NIS
2121}
2122
5f05dabc 2123 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 2124#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 2125PerlIO *
3dd43144 2126Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c
LW
2127{
2128 int p[2];
8ac85365 2129 register I32 This, that;
d8a83dd3 2130 register Pid_t pid;
79072805 2131 SV *sv;
bfce84ec 2132 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ
2133 I32 did_pipes = 0;
2134 int pp[2];
a687059c 2135
45bc9206 2136 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ
2137#ifdef OS2
2138 if (doexec) {
23da6c43 2139 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2140 }
a1d180c4 2141#endif
8ac85365
NIS
2142 This = (*mode == 'w');
2143 that = !This;
3280af22 2144 if (doexec && PL_tainting) {
bbce6d69
PP
2145 taint_env();
2146 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2147 }
c2267164
IZ
2148 if (PerlProc_pipe(p) < 0)
2149 return Nullfp;
e446cec8
IZ
2150 if (doexec && PerlProc_pipe(pp) >= 0)
2151 did_pipes = 1;
52e18b1f 2152 while ((pid = PerlProc_fork()) < 0) {
a687059c 2153 if (errno != EAGAIN) {
6ad3d225 2154 PerlLIO_close(p[This]);
b5ac89c3 2155 PerlLIO_close(p[that]);
e446cec8
IZ
2156 if (did_pipes) {
2157 PerlLIO_close(pp[0]);
2158 PerlLIO_close(pp[1]);
2159 }
a687059c 2160 if (!doexec)
cea2e8a9 2161 Perl_croak(aTHX_ "Can't fork");
a687059c
LW
2162 return Nullfp;
2163 }
2164 sleep(5);
2165 }
2166 if (pid == 0) {
79072805
LW
2167 GV* tmpgv;
2168
30ac6d9b
GS
2169#undef THIS
2170#undef THAT
a687059c 2171#define THIS that
8ac85365 2172#define THAT This
e446cec8
IZ
2173 if (did_pipes) {
2174 PerlLIO_close(pp[0]);
2175#if defined(HAS_FCNTL) && defined(F_SETFD)
2176 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2177#endif
2178 }
a687059c 2179 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS
2180 PerlLIO_dup2(p[THIS], *mode == 'r');
2181 PerlLIO_close(p[THIS]);
b5ac89c3
NIS
2182 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2183 PerlLIO_close(p[THAT]);
a687059c 2184 }
b5ac89c3
NIS
2185 else
2186 PerlLIO_close(p[THAT]);
4435c477 2187#ifndef OS2
a687059c 2188 if (doexec) {
a0d0e21e 2189#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW
2190#ifndef NOFILE
2191#define NOFILE 20
2192#endif
a080fe3d 2193 {
3aed30dc 2194 int fd;
a080fe3d
NIS
2195
2196 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2197 if (fd != pp[1])
3aed30dc 2198 PerlLIO_close(fd);
a080fe3d 2199 }
ae986130 2200#endif
a080fe3d
NIS
2201 /* may or may not use the shell */
2202 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2203 PerlProc__exit(1);
a687059c 2204 }
4435c477 2205#endif /* defined OS2 */
306196c3 2206 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4d76a344 2207 SvREADONLY_off(GvSV(tmpgv));
7766f137 2208 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS
2209 SvREADONLY_on(GvSV(tmpgv));
2210 }
2211#ifdef THREADS_HAVE_PIDS
2212 PL_ppid = (IV)getppid();
2213#endif
3280af22
NIS
2214 PL_forkprocess = 0;
2215 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW
2216 return Nullfp;
2217#undef THIS
2218#undef THAT
2219 }
b5ac89c3 2220 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ
2221 if (did_pipes)
2222 PerlLIO_close(pp[1]);
8ac85365 2223 if (p[that] < p[This]) {
6ad3d225
GS
2224 PerlLIO_dup2(p[This], p[that]);
2225 PerlLIO_close(p[This]);
8ac85365 2226 p[This] = p[that];
62b28dd9 2227 }
b5ac89c3
NIS
2228 else
2229 PerlLIO_close(p[that]);
2230
4755096e 2231 LOCK_FDPID_MUTEX;
3280af22 2232 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2233 UNLOCK_FDPID_MUTEX;
862a34c6 2234 SvUPGRADE(sv,SVt_IV);
45977657 2235 SvIV_set(sv, pid);
3280af22 2236 PL_forkprocess = pid;
e446cec8
IZ
2237 if (did_pipes && pid > 0) {
2238 int errkid;
2239 int n = 0, n1;
2240
2241 while (n < sizeof(int)) {
2242 n1 = PerlLIO_read(pp[0],
2243 (void*)(((char*)&errkid)+n),
2244 (sizeof(int)) - n);
2245 if (n1 <= 0)
2246 break;
2247 n += n1;
2248 }
2f96c702
IZ
2249 PerlLIO_close(pp[0]);
2250 did_pipes = 0;
e446cec8 2251 if (n) { /* Error */
faa466a7 2252 int pid2, status;
8c51524e 2253 PerlLIO_close(p[This]);
e446cec8 2254 if (n != sizeof(int))
cea2e8a9 2255 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG
2256 do {
2257 pid2 = wait4pid(pid, &status, 0);
2258 } while (pid2 == -1 && errno == EINTR);
e446cec8
IZ
2259 errno = errkid; /* Propagate errno from kid */
2260 return Nullfp;
2261 }
2262 }
2263 if (did_pipes)
2264 PerlLIO_close(pp[0]);
8ac85365 2265 return PerlIO_fdopen(p[This], mode);
a687059c 2266}
7c0587c8 2267#else
85ca448a 2268#if defined(atarist) || defined(EPOC)
7c0587c8 2269FILE *popen();
760ac839 2270PerlIO *
864dbfa3 2271Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2272{
45bc9206 2273 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS
2274 /* Call system's popen() to get a FILE *, then import it.
2275 used 0 for 2nd parameter to PerlIO_importFILE;
2276 apparently not used
2277 */
2278 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2279}
2b96b0a5
JH
2280#else
2281#if defined(DJGPP)
2282FILE *djgpp_popen();
2283PerlIO *
2284Perl_my_popen(pTHX_ char *cmd, char *mode)
2285{
2286 PERL_FLUSHALL_FOR_CHILD;
2287 /* Call system's popen() to get a FILE *, then import it.
2288 used 0 for 2nd parameter to PerlIO_importFILE;
2289 apparently not used
2290 */
2291 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2292}
2293#endif
7c0587c8
LW
2294#endif
2295
2296#endif /* !DOSISH */
a687059c 2297
52e18b1f
GS
2298/* this is called in parent before the fork() */
2299void
2300Perl_atfork_lock(void)
2301{
27da23d5 2302 dVAR;
3db8f154 2303#if defined(USE_ITHREADS)
52e18b1f
GS
2304 /* locks must be held in locking order (if any) */
2305# ifdef MYMALLOC
2306 MUTEX_LOCK(&PL_malloc_mutex);
2307# endif
2308 OP_REFCNT_LOCK;
2309#endif
2310}
2311
2312/* this is called in both parent and child after the fork() */
2313void
2314Perl_atfork_unlock(void)
2315{
27da23d5 2316 dVAR;
3db8f154 2317#if defined(USE_ITHREADS)
52e18b1f
GS
2318 /* locks must be released in same order as in atfork_lock() */
2319# ifdef MYMALLOC
2320 MUTEX_UNLOCK(&PL_malloc_mutex);
2321# endif
2322 OP_REFCNT_UNLOCK;
2323#endif
2324}
2325
2326Pid_t
2327Perl_my_fork(void)
2328{
2329#if defined(HAS_FORK)
2330 Pid_t pid;
3db8f154 2331#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS
2332 atfork_lock();
2333 pid = fork();
2334 atfork_unlock();
2335#else
2336 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2337 * handlers elsewhere in the code */
2338 pid = fork();
2339#endif
2340 return pid;
2341#else
2342 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2343 Perl_croak_nocontext("fork() not available");
b961a566 2344 return 0;
52e18b1f
GS
2345#endif /* HAS_FORK */
2346}
2347
748a9306 2348#ifdef DUMP_FDS
35ff7856 2349void
864dbfa3 2350Perl_dump_fds(pTHX_ char *s)
ae986130
LW
2351{
2352 int fd;
c623ac67 2353 Stat_t tmpstatbuf;
ae986130 2354
bf49b057 2355 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2356 for (fd = 0; fd < 32; fd++) {
6ad3d225 2357 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2358 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2359 }
bf49b057 2360 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2361 return;
ae986130 2362}
35ff7856 2363#endif /* DUMP_FDS */
ae986130 2364
fe14fcc3 2365#ifndef HAS_DUP2
fec02dd3 2366int
ba106d47 2367dup2(int oldfd, int newfd)
a687059c 2368{
a0d0e21e 2369#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD
2370 if (oldfd == newfd)
2371 return oldfd;
6ad3d225 2372 PerlLIO_close(newfd);
fec02dd3 2373 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2374#else
fc36a67e
PP
2375#define DUP2_MAX_FDS 256
2376 int fdtmp[DUP2_MAX_FDS];
79072805 2377 I32 fdx = 0;
ae986130
LW
2378 int fd;
2379
fe14fcc3 2380 if (oldfd == newfd)
fec02dd3 2381 return oldfd;
6ad3d225 2382 PerlLIO_close(newfd);
fc36a67e 2383 /* good enough for low fd's... */
6ad3d225 2384 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2385 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2386 PerlLIO_close(fd);
fc36a67e
PP
2387 fd = -1;
2388 break;
2389 }
ae986130 2390 fdtmp[fdx++] = fd;
fc36a67e 2391 }
ae986130 2392 while (fdx > 0)
6ad3d225 2393 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2394 return fd;
62b28dd9 2395#endif
a687059c
LW
2396}
2397#endif
2398
64ca3a65 2399#ifndef PERL_MICRO
ff68c719
PP
2400#ifdef HAS_SIGACTION
2401
abea2c45
HS
2402#ifdef MACOS_TRADITIONAL
2403/* We don't want restart behavior on MacOS */
2404#undef SA_RESTART
2405#endif
2406
ff68c719 2407Sighandler_t
864dbfa3 2408Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2409{
27da23d5 2410 dVAR;
ff68c719
PP
2411 struct sigaction act, oact;
2412
a10b1e10
JH
2413#ifdef USE_ITHREADS
2414 /* only "parent" interpreter can diddle signals */
2415 if (PL_curinterp != aTHX)
8aad04aa 2416 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2417#endif
2418
8aad04aa 2419 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2420 sigemptyset(&act.sa_mask);
2421 act.sa_flags = 0;
2422#ifdef SA_RESTART
4ffa73a3
JH
2423 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2424 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2425#endif
358837b8 2426#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2427 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2428 act.sa_flags |= SA_NOCLDWAIT;
2429#endif
ff68c719 2430 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2431 return (Sighandler_t) SIG_ERR;
ff68c719 2432 else
8aad04aa 2433 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2434}
2435
2436Sighandler_t
864dbfa3 2437Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP
2438{
2439 struct sigaction oact;
2440
2441 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2442 return (Sighandler_t) SIG_ERR;
ff68c719 2443 else
8aad04aa 2444 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2445}
2446
2447int
864dbfa3 2448Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2449{
27da23d5 2450 dVAR;
ff68c719
PP
2451 struct sigaction act;
2452
a10b1e10
JH
2453#ifdef USE_ITHREADS
2454 /* only "parent" interpreter can diddle signals */
2455 if (PL_curinterp != aTHX)
2456 return -1;
2457#endif
2458
8aad04aa 2459 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2460 sigemptyset(&act.sa_mask);
2461 act.sa_flags = 0;
2462#ifdef SA_RESTART
4ffa73a3
JH
2463 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2464 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2465#endif
36b5d377 2466#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2467 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2468 act.sa_flags |= SA_NOCLDWAIT;
2469#endif
ff68c719
PP
2470 return sigaction(signo, &act, save);
2471}
2472
2473int
864dbfa3 2474Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2475{
27da23d5 2476 dVAR;
a10b1e10
JH
2477#ifdef USE_ITHREADS
2478 /* only "parent" interpreter can diddle signals */
2479 if (PL_curinterp != aTHX)
2480 return -1;
2481#endif
2482
ff68c719
PP
2483 return sigaction(signo, save, (struct sigaction *)NULL);
2484}
2485
2486#else /* !HAS_SIGACTION */
2487
2488Sighandler_t
864dbfa3 2489Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2490{
39f1703b 2491#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2492 /* only "parent" interpreter can diddle signals */
2493 if (PL_curinterp != aTHX)
8aad04aa 2494 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2495#endif
2496
6ad3d225 2497 return PerlProc_signal(signo, handler);
ff68c719
PP
2498}
2499
ff68c719
PP
2500static
2501Signal_t
4e35701f 2502sig_trap(int signo)
ff68c719 2503{
27da23d5
JH
2504 dVAR;
2505 PL_sig_trapped++;
ff68c719
PP
2506}
2507
2508Sighandler_t
864dbfa3 2509Perl_rsignal_state(pTHX_ int signo)
ff68c719 2510{
27da23d5 2511 dVAR;
ff68c719
PP
2512 Sighandler_t oldsig;
2513
39f1703b 2514#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2515 /* only "parent" interpreter can diddle signals */
2516 if (PL_curinterp != aTHX)
8aad04aa 2517 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2518#endif
2519
27da23d5 2520 PL_sig_trapped = 0;
6ad3d225
GS
2521 oldsig = PerlProc_signal(signo, sig_trap);
2522 PerlProc_signal(signo, oldsig);
27da23d5 2523 if (PL_sig_trapped)
3aed30dc 2524 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719
PP
2525 return oldsig;
2526}
2527
2528int
864dbfa3 2529Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2530{
39f1703b 2531#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2532 /* only "parent" interpreter can diddle signals */
2533 if (PL_curinterp != aTHX)
2534 return -1;
2535#endif
6ad3d225 2536 *save = PerlProc_signal(signo, handler);
8aad04aa 2537 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2538}
2539
2540int
864dbfa3 2541Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2542{
39f1703b 2543#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2544 /* only "parent" interpreter can diddle signals */
2545 if (PL_curinterp != aTHX)
2546 return -1;
2547#endif
8aad04aa 2548 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2549}
2550
2551#endif /* !HAS_SIGACTION */
64ca3a65 2552#endif /* !PERL_MICRO */
ff68c719 2553
5f05dabc 2554 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2555#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2556I32
864dbfa3 2557Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2558{
ff68c719 2559 Sigsave_t hstat, istat, qstat;
a687059c 2560 int status;
a0d0e21e 2561 SV **svp;
d8a83dd3
JH
2562 Pid_t pid;
2563 Pid_t pid2;
03136e13 2564 bool close_failed;
b7953727 2565 int saved_errno = 0;
22fae026
TM
2566#ifdef WIN32
2567 int saved_win32_errno;
2568#endif
a687059c 2569
4755096e 2570 LOCK_FDPID_MUTEX;
3280af22 2571 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2572 UNLOCK_FDPID_MUTEX;
25d92023 2573 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2574 SvREFCNT_dec(*svp);
3280af22 2575 *svp = &PL_sv_undef;
ddcf38b7
IZ
2576#ifdef OS2
2577 if (pid == -1) { /* Opened by popen. */
2578 return my_syspclose(ptr);
2579 }
a1d180c4 2580#endif
03136e13
CS
2581 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2582 saved_errno = errno;
22fae026
TM
2583#ifdef WIN32
2584 saved_win32_errno = GetLastError();
2585#endif
03136e13 2586 }
7c0587c8 2587#ifdef UTS
6ad3d225 2588 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2589#endif
64ca3a65 2590#ifndef PERL_MICRO
8aad04aa
JH
2591 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2592 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2593 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
64ca3a65 2594#endif
748a9306 2595 do {
1d3434b8
GS
2596 pid2 = wait4pid(pid, &status, 0);
2597 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2598#ifndef PERL_MICRO
ff68c719
PP
2599 rsignal_restore(SIGHUP, &hstat);
2600 rsignal_restore(SIGINT, &istat);
2601 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2602#endif
03136e13 2603 if (close_failed) {
ce6e1103 2604 SETERRNO(saved_errno, 0);
03136e13
CS
2605 return -1;
2606 }
1d3434b8 2607 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2608}
4633a7c4
LW
2609#endif /* !DOSISH */
2610
2986a63f 2611#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
79072805 2612I32
d8a83dd3 2613Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2614{
27da23d5 2615 I32 result = 0;
b7953727
JH
2616 if (!pid)
2617 return -1;
2618#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2619 {
cf28e18a 2620 char spid[TYPE_CHARS(IV)];
20188a90 2621
3aed30dc 2622 if (pid > 0) {
27da23d5 2623 SV** svp;
7b0972df 2624 sprintf(spid, "%"IVdf, (IV)pid);
3aed30dc
HS
2625 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2626 if (svp && *svp != &PL_sv_undef) {
2627 *statusp = SvIVX(*svp);
2628 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2629 return pid;
2630 }
2631 }
2632 else {
2633 HE *entry;
2634
2635 hv_iterinit(PL_pidstatus);
2636 if ((entry = hv_iternext(PL_pidstatus))) {
27da23d5
JH
2637 SV *sv = hv_iterval(PL_pidstatus,entry);
2638
3aed30dc 2639 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3aed30dc
HS
2640 *statusp = SvIVX(sv);
2641 sprintf(spid, "%"IVdf, (IV)pid);
2642 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2643 return pid;
2644 }
20188a90
LW
2645 }
2646 }
68a29c53 2647#endif
79072805 2648#ifdef HAS_WAITPID
367f3c24
IZ
2649# ifdef HAS_WAITPID_RUNTIME
2650 if (!HAS_WAITPID_RUNTIME)
2651 goto hard_way;
2652# endif
cddd4526 2653 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2654 goto finish;
367f3c24
IZ
2655#endif
2656#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
cddd4526 2657 result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
dfcfdb64 2658 goto finish;
367f3c24
IZ
2659#endif
2660#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
27da23d5 2661#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2662 hard_way:
27da23d5 2663#endif
a0d0e21e 2664 {
a0d0e21e 2665 if (flags)
cea2e8a9 2666 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2667 else {
76e3520e 2668 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW
2669 pidgone(result,*statusp);
2670 if (result < 0)
2671 *statusp = -1;
2672 }
a687059c
LW
2673 }
2674#endif
27da23d5 2675#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 2676 finish:
27da23d5 2677#endif
cddd4526
NIS
2678 if (result < 0 && errno == EINTR) {
2679 PERL_ASYNC_CHECK();
2680 }
2681 return result;
a687059c 2682}
2986a63f 2683#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2684
7c0587c8 2685void
d8a83dd3 2686Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2687{
79072805 2688 register SV *sv;
cf28e18a 2689 char spid[TYPE_CHARS(IV)];
a687059c 2690
7b0972df 2691 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2692 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
862a34c6 2693 SvUPGRADE(sv,SVt_IV);
45977657 2694 SvIV_set(sv, status);
20188a90 2695 return;
a687059c
LW
2696}
2697
85ca448a 2698#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 2699int pclose();
ddcf38b7
IZ
2700#ifdef HAS_FORK
2701int /* Cannot prototype with I32
2702 in os2ish.h. */
ba106d47 2703my_syspclose(PerlIO *ptr)
ddcf38b7 2704#else
79072805 2705I32
864dbfa3 2706Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2707#endif
a687059c 2708{
760ac839
LW
2709 /* Needs work for PerlIO ! */
2710 FILE *f = PerlIO_findFILE(ptr);
2711 I32 result = pclose(f);
2b96b0a5
JH
2712 PerlIO_releaseFILE(ptr,f);
2713 return result;
2714}
2715#endif
2716
933fea7f 2717#if defined(DJGPP)
2b96b0a5
JH
2718int djgpp_pclose();
2719I32
2720Perl_my_pclose(pTHX_ PerlIO *ptr)
2721{
2722 /* Needs work for PerlIO ! */
2723 FILE *f = PerlIO_findFILE(ptr);
2724 I32 result = djgpp_pclose(f);
933fea7f 2725 result = (result << 8) & 0xff00;
760ac839
LW
2726 PerlIO_releaseFILE(ptr,f);
2727 return result;
a687059c 2728}
7c0587c8 2729#endif
9f68db38
LW
2730
2731void
864dbfa3 2732Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2733{
79072805 2734 register I32 todo;
08105a92 2735 register const char *frombase = from;
9f68db38
LW
2736
2737 if (len == 1) {
08105a92 2738 register const char c = *from;
9f68db38 2739 while (count-- > 0)
5926133d 2740 *to++ = c;
9f68db38
LW
2741 return;
2742 }
2743 while (count-- > 0) {
2744 for (todo = len; todo > 0; todo--) {
2745 *to++ = *from++;
2746 }
2747 from = frombase;
2748 }
2749}
0f85fab0 2750
fe14fcc3 2751#ifndef HAS_RENAME
79072805 2752I32
4373e329 2753Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 2754{
93a17b20
LW
2755 char *fa = strrchr(a,'/');
2756 char *fb = strrchr(b,'/');
c623ac67
GS
2757 Stat_t tmpstatbuf1;
2758 Stat_t tmpstatbuf2;
46fc3d4c 2759 SV *tmpsv = sv_newmortal();
62b28dd9
LW
2760
2761 if (fa)
2762 fa++;
2763 else
2764 fa = a;
2765 if (fb)
2766 fb++;
2767 else
2768 fb = b;
2769 if (strNE(a,b))
2770 return FALSE;
2771 if (fa == a)
616d8c9c 2772 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2773 else
46fc3d4c 2774 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 2775 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW
2776 return FALSE;
2777 if (fb == b)
616d8c9c 2778 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2779 else
46fc3d4c 2780 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 2781 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW
2782 return FALSE;
2783 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2784 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2785}
fe14fcc3
LW
2786#endif /* !HAS_RENAME */
2787
491527d0 2788char*
e1ec3a88 2789Perl_find_script(pTHX_ const char *scriptname, bool dosearch, const char **search_ext, I32 flags)
491527d0 2790{
e1ec3a88 2791 const char *xfound = Nullch;
491527d0 2792 char *xfailed = Nullch;
0f31cffe 2793 char tmpbuf[MAXPATHLEN];
491527d0 2794 register char *s;
5f74f29c 2795 I32 len = 0;
491527d0
GS
2796 int retval;
2797#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2798# define SEARCH_EXTS ".bat", ".cmd", NULL
2799# define MAX_EXT_LEN 4
2800#endif
2801#ifdef OS2
2802# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2803# define MAX_EXT_LEN 4
2804#endif
2805#ifdef VMS
2806# define SEARCH_EXTS ".pl", ".com", NULL
2807# define MAX_EXT_LEN 4
2808#endif
2809 /* additional extensions to try in each dir if scriptname not found */
2810#ifdef SEARCH_EXTS
e1ec3a88
AL
2811 const char *exts[] = { SEARCH_EXTS };
2812 const char **ext = search_ext ? search_ext : exts;
491527d0 2813 int extidx = 0, i = 0;
e1ec3a88 2814 const char *curext = Nullch;
491527d0 2815#else
53c1dcc0 2816 PERL_UNUSED_ARG(search_ext);
491527d0
GS
2817# define MAX_EXT_LEN 0
2818#endif
2819
2820 /*
2821 * If dosearch is true and if scriptname does not contain path
2822 * delimiters, search the PATH for scriptname.
2823 *
2824 * If SEARCH_EXTS is also defined, will look for each
2825 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2826 * while searching the PATH.
2827 *
2828 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2829 * proceeds as follows:
2830 * If DOSISH or VMSISH:
2831 * + look for ./scriptname{,.foo,.bar}
2832 * + search the PATH for scriptname{,.foo,.bar}
2833 *
2834 * If !DOSISH:
2835 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2836 * this will not look in '.' if it's not in the PATH)
2837 */
84486fc6 2838 tmpbuf[0] = '\0';
491527d0
GS
2839
2840#ifdef VMS
2841# ifdef ALWAYS_DEFTYPES
2842 len = strlen(scriptname);
2843 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2844 int hasdir, idx = 0, deftypes = 1;
2845 bool seen_dot = 1;
2846
2847 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2848# else
2849 if (dosearch) {
2850 int hasdir, idx = 0, deftypes = 1;
2851 bool seen_dot = 1;
2852
2853 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2854# endif
2855 /* The first time through, just add SEARCH_EXTS to whatever we
2856 * already have, so we can check for default file types. */
2857 while (deftypes ||
84486fc6 2858 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS
2859 {
2860 if (deftypes) {
2861 deftypes = 0;
84486fc6 2862 *tmpbuf = '\0';
491527d0 2863 }
84486fc6
GS
2864 if ((strlen(tmpbuf) + strlen(scriptname)
2865 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2866 continue; /* don't search dir with too-long name */
84486fc6 2867 strcat(tmpbuf, scriptname);
491527d0
GS
2868#else /* !VMS */
2869
2870#ifdef DOSISH
2871 if (strEQ(scriptname, "-"))
2872 dosearch = 0;
2873 if (dosearch) { /* Look in '.' first. */
fe2774ed 2874 const char *cur = scriptname;
491527d0
GS
2875#ifdef SEARCH_EXTS
2876 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2877 while (ext[i])
2878 if (strEQ(ext[i++],curext)) {
2879 extidx = -1; /* already has an ext */
2880 break;
2881 }
2882 do {
2883#endif
2884 DEBUG_p(PerlIO_printf(Perl_debug_log,
2885 "Looking for %s\n",cur));
017f25f1
IZ
2886 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2887 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS
2888 dosearch = 0;
2889 scriptname = cur;
2890#ifdef SEARCH_EXTS
2891 break;
2892#endif
2893 }
2894#ifdef SEARCH_EXTS
2895 if (cur == scriptname) {
2896 len = strlen(scriptname);
84486fc6 2897 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2898 break;
490a0e98 2899 /* FIXME? Convert to memcpy */
84486fc6 2900 cur = strcpy(tmpbuf, scriptname);
491527d0
GS
2901 }
2902 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2903 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS
2904#endif
2905 }
2906#endif
2907
cd39f2b6
JH
2908#ifdef MACOS_TRADITIONAL
2909 if (dosearch && !strchr(scriptname, ':') &&
2910 (s = PerlEnv_getenv("Commands")))
2911#else
491527d0
GS
2912 if (dosearch && !strchr(scriptname, '/')
2913#ifdef DOSISH
2914 && !strchr(scriptname, '\\')
2915#endif
cd39f2b6
JH
2916 && (s = PerlEnv_getenv("PATH")))
2917#endif
2918 {
491527d0 2919 bool seen_dot = 0;
92f0c265 2920
3280af22
NIS
2921 PL_bufend = s + strlen(s);
2922 while (s < PL_bufend) {
cd39f2b6
JH
2923#ifdef MACOS_TRADITIONAL
2924 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2925 ',',
2926 &len);
2927#else
491527d0
GS
2928#if defined(atarist) || defined(DOSISH)
2929 for (len = 0; *s
2930# ifdef atarist
2931 && *s != ','
2932# endif
2933 && *s != ';'; len++, s++) {
84486fc6
GS
2934 if (len < sizeof tmpbuf)
2935 tmpbuf[len] = *s;
491527d0 2936 }
84486fc6
GS
2937 if (len < sizeof tmpbuf)
2938 tmpbuf[len] = '\0';
491527d0 2939#else /* ! (atarist || DOSISH) */
3280af22 2940 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS
2941 ':',
2942 &len);
2943#endif /* ! (atarist || DOSISH) */
cd39f2b6 2944#endif /* MACOS_TRADITIONAL */
3280af22 2945 if (s < PL_bufend)
491527d0 2946 s++;
84486fc6 2947 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 2948 continue; /* don't search dir with too-long name */
cd39f2b6
JH
2949#ifdef MACOS_TRADITIONAL
2950 if (len && tmpbuf[len - 1] != ':')
2951 tmpbuf[len++] = ':';
2952#else
491527d0 2953 if (len
490a0e98 2954# if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS
2955 && tmpbuf[len - 1] != '/'
2956 && tmpbuf[len - 1] != '\\'
490a0e98 2957# endif
491527d0 2958 )
84486fc6
GS
2959 tmpbuf[len++] = '/';
2960 if (len == 2 && tmpbuf[0] == '.')
491527d0 2961 seen_dot = 1;
cd39f2b6 2962#endif
490a0e98
NC
2963 /* FIXME? Convert to memcpy by storing previous strlen(scriptname)
2964 */
84486fc6 2965 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS
2966#endif /* !VMS */
2967
2968#ifdef SEARCH_EXTS
84486fc6 2969 len = strlen(tmpbuf);
491527d0
GS
2970 if (extidx > 0) /* reset after previous loop */
2971 extidx = 0;
2972 do {
2973#endif
84486fc6 2974 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 2975 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ
2976 if (S_ISDIR(PL_statbuf.st_mode)) {
2977 retval = -1;
2978 }
491527d0
GS
2979#ifdef SEARCH_EXTS
2980 } while ( retval < 0 /* not there */
2981 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 2982 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS
2983 );
2984#endif
2985 if (retval < 0)
2986 continue;
3280af22
NIS
2987 if (S_ISREG(PL_statbuf.st_mode)
2988 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 2989#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 2990 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS
2991#endif
2992 )
2993 {
3aed30dc 2994 xfound = tmpbuf; /* bingo! */
491527d0
GS
2995 break;
2996 }
2997 if (!xfailed)
84486fc6 2998 xfailed = savepv(tmpbuf);
491527d0
GS
2999 }
3000#ifndef DOSISH
017f25f1 3001 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3002 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3003 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS
3004#endif
3005 seen_dot = 1; /* Disable message. */
9ccb31f9
GS
3006 if (!xfound) {
3007 if (flags & 1) { /* do or die? */
3aed30dc 3008 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS
3009 (xfailed ? "execute" : "find"),
3010 (xfailed ? xfailed : scriptname),
3011 (xfailed ? "" : " on PATH"),
3012 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3013 }
3014 scriptname = Nullch;
3015 }
43c5f42d 3016 Safefree(xfailed);
491527d0
GS
3017 scriptname = xfound;
3018 }
9ccb31f9 3019 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS
3020}
3021
ba869deb
GS
3022#ifndef PERL_GET_CONTEXT_DEFINED
3023
3024void *
3025Perl_get_context(void)
3026{
27da23d5 3027 dVAR;
3db8f154 3028#if defined(USE_ITHREADS)
ba869deb
GS
3029# ifdef OLD_PTHREADS_API
3030 pthread_addr_t t;
3031 if (pthread_getspecific(PL_thr_key, &t))
3032 Perl_croak_nocontext("panic: pthread_getspecific");
3033 return (void*)t;
3034# else
bce813aa 3035# ifdef I_MACH_CTHREADS
8b8b35ab 3036 return (void*)cthread_data(cthread_self());
bce813aa 3037# else
8b8b35ab
JH
3038 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3039# endif
c44d3fdb 3040# endif
ba869deb
GS
3041#else
3042 return (void*)NULL;
3043#endif
3044}
3045
3046void
3047Perl_set_context(void *t)
3048{
8772537c 3049 dVAR;
3db8f154 3050#if defined(USE_ITHREADS)
c44d3fdb
GS
3051# ifdef I_MACH_CTHREADS
3052 cthread_set_data(cthread_self(), t);
3053# else
ba869deb
GS
3054 if (pthread_setspecific(PL_thr_key, t))
3055 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3056# endif
b464bac0 3057#else
8772537c 3058 PERL_UNUSED_ARG(t);
ba869deb
GS
3059#endif
3060}
3061
3062#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3063
27da23d5 3064#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3065struct perl_vars *
864dbfa3 3066Perl_GetVars(pTHX)
22239a37 3067{
533c011a 3068 return &PL_Vars;
22239a37 3069}
31fb1209
NIS
3070#endif
3071
1cb0ed9b 3072char **
864dbfa3 3073Perl_get_op_names(pTHX)
31fb1209 3074{
27da23d5 3075 return (char **)PL_op_name;
31fb1209
NIS
3076}
3077
1cb0ed9b 3078char **
864dbfa3 3079Perl_get_op_descs(pTHX)
31fb1209 3080{
27da23d5 3081 return (char **)PL_op_desc;
31fb1209 3082}
9e6b2b00 3083
e1ec3a88 3084const char *
864dbfa3 3085Perl_get_no_modify(pTHX)
9e6b2b00 3086{
e1ec3a88 3087 return PL_no_modify;
9e6b2b00
GS
3088}
3089
3090U32 *
864dbfa3 3091Perl_get_opargs(pTHX)
9e6b2b00 3092{
27da23d5 3093 return (U32 *)PL_opargs;
9e6b2b00 3094}
51aa15f3 3095
0cb96387
GS
3096PPADDR_t*
3097Perl_get_ppaddr(pTHX)
3098{
27da23d5 3099 dVAR;
12ae5dfc 3100 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS
3101}
3102
a6c40364
GS
3103#ifndef HAS_GETENV_LEN
3104char *
bf4acbe4 3105Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3106{
8772537c 3107 char * const env_trans = PerlEnv_getenv(env_elem);
a6c40364
GS
3108 if (env_trans)
3109 *len = strlen(env_trans);
3110 return env_trans;
f675dbe5
CB
3111}
3112#endif
3113
dc9e4912
GS
3114
3115MGVTBL*
864dbfa3 3116Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3117{
27da23d5 3118 const MGVTBL* result = Null(MGVTBL*);
dc9e4912
GS
3119
3120 switch(vtbl_id) {
3121 case want_vtbl_sv:
3122 result = &PL_vtbl_sv;
3123 break;
3124 case want_vtbl_env:
3125 result = &PL_vtbl_env;
3126 break;
3127 case want_vtbl_envelem:
3128 result = &PL_vtbl_envelem;
3129 break;
3130 case want_vtbl_sig:
3131 result = &PL_vtbl_sig;
3132 break;
3133 case want_vtbl_sigelem:
3134 result = &PL_vtbl_sigelem;
3135 break;
3136 case want_vtbl_pack:
3137 result = &PL_vtbl_pack;
3138 break;
3139 case want_vtbl_packelem:
3140 result = &PL_vtbl_packelem;
3141 break;
3142 case want_vtbl_dbline:
3143 result = &PL_vtbl_dbline;
3144 break;
3145 case want_vtbl_isa:
3146 result = &PL_vtbl_isa;
3147 break;
3148 case want_vtbl_isaelem:
3149 result = &PL_vtbl_isaelem;
3150 break;
3151 case want_vtbl_arylen:
3152 result = &PL_vtbl_arylen;
3153 break;
3154 case want_vtbl_glob:
3155 result = &PL_vtbl_glob;
3156 break;
3157 case want_vtbl_mglob:
3158 result = &PL_vtbl_mglob;
3159 break;
3160 case want_vtbl_nkeys:
3161 result = &PL_vtbl_nkeys;
3162 break;
3163 case want_vtbl_taint:
3164 result = &PL_vtbl_taint;
3165 break;
3166 case want_vtbl_substr:
3167 result = &PL_vtbl_substr;
3168 break;
3169 case want_vtbl_vec:
3170 result = &PL_vtbl_vec;
3171 break;
3172 case want_vtbl_pos:
3173 result = &PL_vtbl_pos;
3174 break;
3175 case want_vtbl_bm:
3176 result = &PL_vtbl_bm;
3177 break;
3178 case want_vtbl_fm:
3179 result = &PL_vtbl_fm;
3180 break;
3181 case want_vtbl_uvar:
3182 result = &PL_vtbl_uvar;
3183 break;
dc9e4912
GS
3184 case want_vtbl_defelem:
3185 result = &PL_vtbl_defelem;
3186 break;
3187 case want_vtbl_regexp:
3188 result = &PL_vtbl_regexp;
3189 break;
3190 case want_vtbl_regdata:
3191 result = &PL_vtbl_regdata;
3192 break;
3193 case want_vtbl_regdatum:
3194 result = &PL_vtbl_regdatum;
3195 break;
3c90161d 3196#ifdef USE_LOCALE_COLLATE
dc9e4912
GS
3197 case want_vtbl_collxfrm:
3198 result = &PL_vtbl_collxfrm;
3199 break;
3c90161d 3200#endif
dc9e4912
GS
3201 case want_vtbl_amagic:
3202 result = &PL_vtbl_amagic;
3203 break;
3204 case want_vtbl_amagicelem:
3205 result = &PL_vtbl_amagicelem;
3206 break;
810b8aa5
GS
3207 case want_vtbl_backref:
3208 result = &PL_vtbl_backref;
3209 break;
7e8c5dac
HS
3210 case want_vtbl_utf8:
3211 result = &PL_vtbl_utf8;
3212 break;
dc9e4912 3213 }
27da23d5 3214 return (MGVTBL*)result;
dc9e4912
GS
3215}
3216
767df6a1 3217I32
864dbfa3 3218Perl_my_fflush_all(pTHX)
767df6a1 3219{
f800e14d 3220#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3221 return PerlIO_flush(NULL);
767df6a1 3222#else
8fbdfb7c 3223# if defined(HAS__FWALK)
f13a2bc0 3224 extern int fflush(FILE *);
74cac757
JH
3225 /* undocumented, unprototyped, but very useful BSDism */
3226 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3227 _fwalk(&fflush);
74cac757 3228 return 0;
8fa7f367 3229# else
8fbdfb7c 3230# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3231 long open_max = -1;
8fbdfb7c 3232# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3233 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3234# else
8fa7f367 3235# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3236 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH
3237# else
3238# ifdef FOPEN_MAX
74cac757 3239 open_max = FOPEN_MAX;
8fa7f367
JH
3240# else
3241# ifdef OPEN_MAX
74cac757 3242 open_max = OPEN_MAX;
8fa7f367
JH
3243# else
3244# ifdef _NFILE
d2201af2 3245 open_max = _NFILE;
8fa7f367
JH
3246# endif
3247# endif
74cac757 3248# endif
767df6a1
JH
3249# endif
3250# endif
767df6a1
JH
3251 if (open_max > 0) {
3252 long i;
3253 for (i = 0; i < open_max; i++)
d2201af2
AD
3254 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3255 STDIO_STREAM_ARRAY[i]._file < open_max &&
3256 STDIO_STREAM_ARRAY[i]._flag)
3257 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH
3258 return 0;
3259 }
8fbdfb7c 3260# endif
93189314 3261 SETERRNO(EBADF,RMS_IFI);
767df6a1 3262 return EOF;
74cac757 3263# endif
767df6a1
JH
3264#endif
3265}
097ee67d 3266
69282e91 3267void
e1ec3a88 3268Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
bc37a18f 3269{
b64e5050 3270 const char * const func =
66fc2fa5
JH
3271 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3272 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
bc37a18f 3273 PL_op_desc[op];
b64e5050
AL
3274 const char * const pars = OP_IS_FILETEST(op) ? "" : "()";
3275 const char * const type = OP_IS_SOCKET(op)
3aed30dc
HS
3276 || (gv && io && IoTYPE(io) == IoTYPE_SOCKET)
3277 ? "socket" : "filehandle";
b64e5050 3278 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
66fc2fa5 3279
4c80c0b2 3280 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3aed30dc 3281 if (ckWARN(WARN_IO)) {
b64e5050 3282 const char * const direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out";
3aed30dc
HS
3283 if (name && *name)
3284 Perl_warner(aTHX_ packWARN(WARN_IO),
3285 "Filehandle %s opened only for %sput",
fd322ea4 3286 name, direction);
3aed30dc
HS
3287 else
3288 Perl_warner(aTHX_ packWARN(WARN_IO),
fd322ea4 3289 "Filehandle opened only for %sput", direction);
3aed30dc 3290 }
2dd78f96
JH
3291 }
3292 else {
e1ec3a88 3293 const char *vile;
3aed30dc
HS
3294 I32 warn_type;
3295
3296 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3297 vile = "closed";
3298 warn_type = WARN_CLOSED;
3299 }
3300 else {
3301 vile = "unopened";
3302 warn_type = WARN_UNOPENED;
3303 }
3304
3305 if (ckWARN(warn_type)) {
3306 if (name && *name) {
3307 Perl_warner(aTHX_ packWARN(warn_type),
3308 "%s%s on %s %s %s", func, pars, vile, type, name);
3309 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3310 Perl_warner(
3311 aTHX_ packWARN(warn_type),
3312 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3313 func, pars, name
3314 );
3315 }
3316 else {
3317 Perl_warner(aTHX_ packWARN(warn_type),
3318 "%s%s on %s %s", func, pars, vile, type);
3319 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3320 Perl_warner(
3321 aTHX_ packWARN(warn_type),
3322 "\t(Are you trying to call %s%s on dirhandle?)\n",
3323 func, pars
3324 );
3325 }
3326 }
bc37a18f 3327 }
69282e91 3328}
a926ef6b
JH
3329
3330#ifdef EBCDIC
cbebf344
JH
3331/* in ASCII order, not that it matters */
3332static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3333
a926ef6b
JH
3334int
3335Perl_ebcdic_control(pTHX_ int ch)
3336{
3aed30dc 3337 if (ch > 'a') {
e1ec3a88 3338 const char *ctlp;
3aed30dc
HS
3339
3340 if (islower(ch))
3341 ch = toupper(ch);
3342
3343 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3344 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
a926ef6b 3345 }
3aed30dc
HS
3346
3347 if (ctlp == controllablechars)
3348 return('\177'); /* DEL */
3349 else
3350 return((unsigned char)(ctlp - controllablechars - 1));
3351 } else { /* Want uncontrol */
3352 if (ch == '\177' || ch == -1)
3353 return('?');
3354 else if (ch == '\157')
3355 return('\177');
3356 else if (ch == '\174')
3357 return('\000');
3358 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3359 return('\036');
3360 else if (ch == '\155')
3361 return('\037');
3362 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3363 return(controllablechars[ch+1]);
3364 else
3365 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3366 }
a926ef6b
JH
3367}
3368#endif
e72cf795 3369
f6adc668 3370/* To workaround core dumps from the uninitialised tm_zone we get the
e72cf795
JH
3371 * system to give us a reasonable struct to copy. This fix means that
3372 * strftime uses the tm_zone and tm_gmtoff values returned by
3373 * localtime(time()). That should give the desired result most of the
3374 * time. But probably not always!
3375 *
f6adc668
JH
3376 * This does not address tzname aspects of NETaa14816.
3377 *
e72cf795 3378 */
f6adc668 3379
e72cf795
JH
3380#ifdef HAS_GNULIBC
3381# ifndef STRUCT_TM_HASZONE
3382# define STRUCT_TM_HASZONE
3383# endif
3384#endif
3385
f6adc668
JH
3386#ifdef STRUCT_TM_HASZONE /* Backward compat */
3387# ifndef HAS_TM_TM_ZONE
3388# define HAS_TM_TM_ZONE
3389# endif
3390#endif
3391
e72cf795 3392void
f1208910 3393Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795 3394{
f6adc668 3395#ifdef HAS_TM_TM_ZONE
e72cf795 3396 Time_t now;
1b6737cc 3397 const struct tm* my_tm;
e72cf795 3398 (void)time(&now);
82c57498 3399 my_tm = localtime(&now);
ca46b8ee
SP
3400 if (my_tm)
3401 Copy(my_tm, ptm, 1, struct tm);
1b6737cc
AL
3402#else
3403 PERL_UNUSED_ARG(ptm);
e72cf795
JH
3404#endif
3405}
3406
3407/*
3408 * mini_mktime - normalise struct tm values without the localtime()
3409 * semantics (and overhead) of mktime().
3410 */
3411void
f1208910 3412Perl_mini_mktime(pTHX_ struct tm *ptm)
e72cf795
JH
3413{
3414 int yearday;
3415 int secs;
3416 int month, mday, year, jday;
3417 int odd_cent, odd_year;
3418
3419#define DAYS_PER_YEAR 365
3420#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3421#define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3422#define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3423#define SECS_PER_HOUR (60*60)
3424#define SECS_PER_DAY (24*SECS_PER_HOUR)
3425/* parentheses deliberately absent on these two, otherwise they don't work */
3426#define MONTH_TO_DAYS 153/5
3427#define DAYS_TO_MONTH 5/153
3428/* offset to bias by March (month 4) 1st between month/mday & year finding */
3429#define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3430/* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3431#define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3432
3433/*
3434 * Year/day algorithm notes:
3435 *
3436 * With a suitable offset for numeric value of the month, one can find
3437 * an offset into the year by considering months to have 30.6 (153/5) days,
3438 * using integer arithmetic (i.e., with truncation). To avoid too much
3439 * messing about with leap days, we consider January and February to be
3440 * the 13th and 14th month of the previous year. After that transformation,
3441 * we need the month index we use to be high by 1 from 'normal human' usage,
3442 * so the month index values we use run from 4 through 15.
3443 *
3444 * Given that, and the rules for the Gregorian calendar (leap years are those
3445 * divisible by 4 unless also divisible by 100, when they must be divisible
3446 * by 400 instead), we can simply calculate the number of days since some
3447 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3448 * the days we derive from our month index, and adding in the day of the
3449 * month. The value used here is not adjusted for the actual origin which
3450 * it normally would use (1 January A.D. 1), since we're not exposing it.
3451 * We're only building the value so we can turn around and get the
3452 * normalised values for the year, month, day-of-month, and day-of-year.
3453 *
3454 * For going backward, we need to bias the value we're using so that we find
3455 * the right year value. (Basically, we don't want the contribution of
3456 * March 1st to the number to apply while deriving the year). Having done
3457 * that, we 'count up' the contribution to the year number by accounting for
3458 * full quadracenturies (400-year periods) with their extra leap days, plus
3459 * the contribution from full centuries (to avoid counting in the lost leap
3460 * days), plus the contribution from full quad-years (to count in the normal
3461 * leap days), plus the leftover contribution from any non-leap years.
3462 * At this point, if we were working with an actual leap day, we'll have 0
3463 * days left over. This is also true for March 1st, however. So, we have
3464 * to special-case that result, and (earlier) keep track of the 'odd'
3465 * century and year contributions. If we got 4 extra centuries in a qcent,
3466 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3467 * Otherwise, we add back in the earlier bias we removed (the 123 from
3468 * figuring in March 1st), find the month index (integer division by 30.6),
3469 * and the remainder is the day-of-month. We then have to convert back to
3470 * 'real' months (including fixing January and February from being 14/15 in
3471 * the previous year to being in the proper year). After that, to get
3472 * tm_yday, we work with the normalised year and get a new yearday value for
3473 * January 1st, which we subtract from the yearday value we had earlier,
3474 * representing the date we've re-built. This is done from January 1
3475 * because tm_yday is 0-origin.
3476 *
3477 * Since POSIX time routines are only guaranteed to work for times since the
3478 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3479 * applies Gregorian calendar rules even to dates before the 16th century
3480 * doesn't bother me. Besides, you'd need cultural context for a given
3481 * date to know whether it was Julian or Gregorian calendar, and that's
3482 * outside the scope for this routine. Since we convert back based on the
3483 * same rules we used to build the yearday, you'll only get strange results
3484 * for input which needed normalising, or for the 'odd' century years which
3485 * were leap years in the Julian calander but not in the Gregorian one.
3486 * I can live with that.
3487 *
3488 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3489 * that's still outside the scope for POSIX time manipulation, so I don't
3490 * care.
3491 */
3492
3493 year = 1900 + ptm->tm_year;
3494 month = ptm->tm_mon;
3495 mday = ptm->tm_mday;
3496 /* allow given yday with no month & mday to dominate the result */
3497 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3498 month = 0;
3499 mday = 0;
3500 jday = 1 + ptm->tm_yday;
3501 }
3502 else {
3503 jday = 0;
3504 }
3505 if (month >= 2)
3506 month+=2;
3507 else
3508 month+=14, year--;
3509 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3510 yearday += month*MONTH_TO_DAYS + mday + jday;
3511 /*
3512 * Note that we don't know when leap-seconds were or will be,
3513 * so we have to trust the user if we get something which looks
3514 * like a sensible leap-second. Wild values for seconds will
3515 * be rationalised, however.
3516 */
3517 if ((unsigned) ptm->tm_sec <= 60) {
3518 secs = 0;
3519 }
3520 else {
3521 secs = ptm->tm_sec;
3522 ptm->tm_sec = 0;
3523 }
3524 secs += 60 * ptm->tm_min;
3525 secs += SECS_PER_HOUR * ptm->tm_hour;
3526 if (secs < 0) {
3527 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3528 /* got negative remainder, but need positive time */
3529 /* back off an extra day to compensate */
3530 yearday += (secs/SECS_PER_DAY)-1;
3531 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3532 }
3533 else {
3534 yearday += (secs/SECS_PER_DAY);
3535 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3536 }
3537 }
3538 else if (secs >= SECS_PER_DAY) {
3539 yearday += (secs/SECS_PER_DAY);
3540 secs %= SECS_PER_DAY;
3541 }
3542 ptm->tm_hour = secs/SECS_PER_HOUR;
3543 secs %= SECS_PER_HOUR;
3544 ptm->tm_min = secs/60;
3545 secs %= 60;
3546 ptm->tm_sec += secs;
3547 /* done with time of day effects */
3548 /*
3549 * The algorithm for yearday has (so far) left it high by 428.
3550 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3551 * bias it by 123 while trying to figure out what year it
3552 * really represents. Even with this tweak, the reverse
3553 * translation fails for years before A.D. 0001.
3554 * It would still fail for Feb 29, but we catch that one below.
3555 */
3556 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3557 yearday -= YEAR_ADJUST;
3558 year = (yearday / DAYS_PER_QCENT) * 400;
3559 yearday %= DAYS_PER_QCENT;
3560 odd_cent = yearday / DAYS_PER_CENT;
3561 year += odd_cent * 100;
3562 yearday %= DAYS_PER_CENT;
3563 year += (yearday / DAYS_PER_QYEAR) * 4;
3564 yearday %= DAYS_PER_QYEAR;
3565 odd_year = yearday / DAYS_PER_YEAR;
3566 year += odd_year;
3567 yearday %= DAYS_PER_YEAR;
3568 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3569 month = 1;
3570 yearday = 29;
3571 }
3572 else {
3573 yearday += YEAR_ADJUST; /* recover March 1st crock */
3574 month = yearday*DAYS_TO_MONTH;
3575 yearday -= month*MONTH_TO_DAYS;
3576 /* recover other leap-year adjustment */
3577 if (month > 13) {
3578 month-=14;
3579 year++;
3580 }
3581 else {
3582 month-=2;
3583 }
3584 }
3585 ptm->tm_year = year - 1900;
3586 if (yearday) {
3587 ptm->tm_mday = yearday;
3588 ptm->tm_mon = month;
3589 }
3590 else {
3591 ptm->tm_mday = 31;
3592 ptm->tm_mon = month - 1;
3593 }
3594 /* re-build yearday based on Jan 1 to get tm_yday */
3595 year--;
3596 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3597 yearday += 14*MONTH_TO_DAYS + 1;
3598 ptm->tm_yday = jday - yearday;
3599 /* fix tm_wday if not overridden by caller */
3600 if ((unsigned)ptm->tm_wday > 6)
3601 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3602}
b3c85772
JH
3603
3604char *
e1ec3a88 3605Perl_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
3606{
3607#ifdef HAS_STRFTIME
3608 char *buf;
3609 int buflen;
3610 struct tm mytm;
3611 int len;
3612
3613 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3614 mytm.tm_sec = sec;
3615 mytm.tm_min = min;
3616 mytm.tm_hour = hour;
3617 mytm.tm_mday = mday;
3618 mytm.tm_mon = mon;
3619 mytm.tm_year = year;
3620 mytm.tm_wday = wday;
3621 mytm.tm_yday = yday;
3622 mytm.tm_isdst = isdst;
3623 mini_mktime(&mytm);
c473feec
SR
3624 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3625#if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3626 STMT_START {
3627 struct tm mytm2;
3628 mytm2 = mytm;
3629 mktime(&mytm2);
3630#ifdef HAS_TM_TM_GMTOFF
3631 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3632#endif
3633#ifdef HAS_TM_TM_ZONE
3634 mytm.tm_zone = mytm2.tm_zone;
3635#endif
3636 } STMT_END;
3637#endif
b3c85772 3638 buflen = 64;
a02a5408 3639 Newx(buf, buflen, char);
b3c85772
JH
3640 len = strftime(buf, buflen, fmt, &mytm);
3641 /*
877f6a72 3642 ** The following is needed to handle to the situation where
b3c85772
JH
3643 ** tmpbuf overflows. Basically we want to allocate a buffer
3644 ** and try repeatedly. The reason why it is so complicated
3645 ** is that getting a return value of 0 from strftime can indicate
3646 ** one of the following:
3647 ** 1. buffer overflowed,
3648 ** 2. illegal conversion specifier, or
3649 ** 3. the format string specifies nothing to be returned(not
3650 ** an error). This could be because format is an empty string
3651 ** or it specifies %p that yields an empty string in some locale.
3652 ** If there is a better way to make it portable, go ahead by
3653 ** all means.
3654 */
3655 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3656 return buf;
3657 else {
3658 /* Possibly buf overflowed - try again with a bigger buf */
e1ec3a88
AL
3659 const int fmtlen = strlen(fmt);
3660 const int bufsize = fmtlen + buflen;
877f6a72 3661
a02a5408 3662 Newx(buf, bufsize, char);
b3c85772
JH
3663 while (buf) {
3664 buflen = strftime(buf, bufsize, fmt, &mytm);
3665 if (buflen > 0 && buflen < bufsize)
3666 break;
3667 /* heuristic to prevent out-of-memory errors */
3668 if (bufsize > 100*fmtlen) {
3669 Safefree(buf);
3670 buf = NULL;
3671 break;
3672 }
e1ec3a88 3673 Renew(buf, bufsize*2, char);
b3c85772
JH
3674 }
3675 return buf;
3676 }
3677#else
3678 Perl_croak(aTHX_ "panic: no strftime");
27da23d5 3679 return NULL;
b3c85772
JH
3680#endif
3681}
3682
877f6a72
NIS
3683
3684#define SV_CWD_RETURN_UNDEF \
3685sv_setsv(sv, &PL_sv_undef); \
3686return FALSE
3687
3688#define SV_CWD_ISDOT(dp) \
3689 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3aed30dc 3690 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
877f6a72
NIS
3691
3692/*
ccfc67b7
JH
3693=head1 Miscellaneous Functions
3694
89423764 3695=for apidoc getcwd_sv
877f6a72
NIS
3696
3697Fill the sv with current working directory
3698
3699=cut
3700*/
3701
3702/* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3703 * rewritten again by dougm, optimized for use with xs TARG, and to prefer