This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Eliminate (SV *) casts from sv.c and [tu]*.c, except for the cast in
[perl5.git] / util.c
CommitLineData
a0d0e21e 1/* util.c
a687059c 2 *
1129b882
NC
3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a687059c 5 *
d48672a2
LW
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8d063cd8 8 *
8d063cd8 9 */
a0d0e21e
LW
10
11/*
12 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
13 * not content." --Gandalf
14 */
8d063cd8 15
166f8a29
DM
16/* This file contains assorted utility routines.
17 * Which is a polite way of saying any stuff that people couldn't think of
18 * a better place for. Amongst other things, it includes the warning and
19 * dieing stuff, plus wrappers for malloc code.
20 */
21
8d063cd8 22#include "EXTERN.h"
864dbfa3 23#define PERL_IN_UTIL_C
8d063cd8 24#include "perl.h"
62b28dd9 25
64ca3a65 26#ifndef PERL_MICRO
a687059c 27#include <signal.h>
36477c24
PP
28#ifndef SIG_ERR
29# define SIG_ERR ((Sighandler_t) -1)
30#endif
64ca3a65 31#endif
36477c24 32
172d2248
OS
33#ifdef __Lynx__
34/* Missing protos on LynxOS */
35int putenv(char *);
36#endif
37
ff68c719
PP
38#ifdef I_SYS_WAIT
39# include <sys/wait.h>
40#endif
41
868439a2
JH
42#ifdef HAS_SELECT
43# ifdef I_SYS_SELECT
44# include <sys/select.h>
45# endif
46#endif
47
8d063cd8 48#define FLUSH
8d063cd8 49
16cebae2
GS
50#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
51# define FD_CLOEXEC 1 /* NeXT needs this */
52#endif
53
a687059c
LW
54/* NOTE: Do not call the next three routines directly. Use the macros
55 * in handy.h, so that we can easily redefine everything to do tracking of
56 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 57 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW
58 */
59
ca8d8976
NC
60static char *
61S_write_no_mem(pTHX)
62{
97aff369 63 dVAR;
ca8d8976
NC
64 /* Can't use PerlIO to write as it allocates memory */
65 PerlLIO_write(PerlIO_fileno(Perl_error_log),
66 PL_no_mem, strlen(PL_no_mem));
67 my_exit(1);
1f440eb2 68 NORETURN_FUNCTION_END;
ca8d8976
NC
69}
70
26fa51c3
AMS
71/* paranoid version of system's malloc() */
72
bd4080b3 73Malloc_t
4f63d024 74Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 75{
54aff467 76 dTHX;
bd4080b3 77 Malloc_t ptr;
55497cff 78#ifdef HAS_64K_LIMIT
62b28dd9 79 if (size > 0xffff) {
bf49b057 80 PerlIO_printf(Perl_error_log,
16cebae2 81 "Allocation too large: %lx\n", size) FLUSH;
54aff467 82 my_exit(1);
62b28dd9 83 }
55497cff 84#endif /* HAS_64K_LIMIT */
e8dda941
JD
85#ifdef PERL_TRACK_MEMPOOL
86 size += sTHX;
87#endif
34de22dd
LW
88#ifdef DEBUGGING
89 if ((long)size < 0)
4f63d024 90 Perl_croak_nocontext("panic: malloc");
34de22dd 91#endif
12ae5dfc 92 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 93 PERL_ALLOC_CHECK(ptr);
97835f67 94 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
bd61b366 95 if (ptr != NULL) {
e8dda941 96#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
97 struct perl_memory_debug_header *const header
98 = (struct perl_memory_debug_header *)ptr;
9a083ecf
NC
99#endif
100
101#ifdef PERL_POISON
7e337ee0 102 PoisonNew(((char *)ptr), size, char);
9a083ecf 103#endif
7cb608b5 104
9a083ecf 105#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
106 header->interpreter = aTHX;
107 /* Link us into the list. */
108 header->prev = &PL_memory_debug_header;
109 header->next = PL_memory_debug_header.next;
110 PL_memory_debug_header.next = header;
111 header->next->prev = header;
cd1541b2 112# ifdef PERL_POISON
7cb608b5 113 header->size = size;
cd1541b2 114# endif
e8dda941
JD
115 ptr = (Malloc_t)((char*)ptr+sTHX);
116#endif
8d063cd8 117 return ptr;
e8dda941 118}
3280af22 119 else if (PL_nomemok)
bd61b366 120 return NULL;
8d063cd8 121 else {
0bd48802 122 return write_no_mem();
8d063cd8
LW
123 }
124 /*NOTREACHED*/
125}
126
f2517201 127/* paranoid version of system's realloc() */
8d063cd8 128
bd4080b3 129Malloc_t
4f63d024 130Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 131{
54aff467 132 dTHX;
bd4080b3 133 Malloc_t ptr;
9a34ef1d 134#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 135 Malloc_t PerlMem_realloc();
ecfc5424 136#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 137
a1d180c4 138#ifdef HAS_64K_LIMIT
5f05dabc 139 if (size > 0xffff) {
bf49b057 140 PerlIO_printf(Perl_error_log,
5f05dabc 141 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 142 my_exit(1);
5f05dabc 143 }
55497cff 144#endif /* HAS_64K_LIMIT */
7614df0c 145 if (!size) {
f2517201 146 safesysfree(where);
7614df0c
JD
147 return NULL;
148 }
149
378cc40b 150 if (!where)
f2517201 151 return safesysmalloc(size);
e8dda941
JD
152#ifdef PERL_TRACK_MEMPOOL
153 where = (Malloc_t)((char*)where-sTHX);
154 size += sTHX;
7cb608b5
NC
155 {
156 struct perl_memory_debug_header *const header
157 = (struct perl_memory_debug_header *)where;
158
159 if (header->interpreter != aTHX) {
160 Perl_croak_nocontext("panic: realloc from wrong pool");
161 }
162 assert(header->next->prev == header);
163 assert(header->prev->next == header);
cd1541b2 164# ifdef PERL_POISON
7cb608b5
NC
165 if (header->size > size) {
166 const MEM_SIZE freed_up = header->size - size;
167 char *start_of_freed = ((char *)where) + size;
7e337ee0 168 PoisonFree(start_of_freed, freed_up, char);
7cb608b5
NC
169 }
170 header->size = size;
cd1541b2 171# endif
7cb608b5 172 }
e8dda941 173#endif
34de22dd
LW
174#ifdef DEBUGGING
175 if ((long)size < 0)
4f63d024 176 Perl_croak_nocontext("panic: realloc");
34de22dd 177#endif
12ae5dfc 178 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 179 PERL_ALLOC_CHECK(ptr);
a1d180c4 180
4fd0a9b8
NC
181 /* MUST do this fixup first, before doing ANYTHING else, as anything else
182 might allocate memory/free/move memory, and until we do the fixup, it
183 may well be chasing (and writing to) free memory. */
e8dda941 184#ifdef PERL_TRACK_MEMPOOL
4fd0a9b8 185 if (ptr != NULL) {
7cb608b5
NC
186 struct perl_memory_debug_header *const header
187 = (struct perl_memory_debug_header *)ptr;
188
9a083ecf
NC
189# ifdef PERL_POISON
190 if (header->size < size) {
191 const MEM_SIZE fresh = size - header->size;
192 char *start_of_fresh = ((char *)ptr) + size;
7e337ee0 193 PoisonNew(start_of_fresh, fresh, char);
9a083ecf
NC
194 }
195# endif
196
7cb608b5
NC
197 header->next->prev = header;
198 header->prev->next = header;
199
e8dda941 200 ptr = (Malloc_t)((char*)ptr+sTHX);
4fd0a9b8 201 }
e8dda941 202#endif
4fd0a9b8
NC
203
204 /* In particular, must do that fixup above before logging anything via
205 *printf(), as it can reallocate memory, which can cause SEGVs. */
206
207 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
208 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
209
210
211 if (ptr != NULL) {
8d063cd8 212 return ptr;
e8dda941 213 }
3280af22 214 else if (PL_nomemok)
bd61b366 215 return NULL;
8d063cd8 216 else {
0bd48802 217 return write_no_mem();
8d063cd8
LW
218 }
219 /*NOTREACHED*/
220}
221
f2517201 222/* safe version of system's free() */
8d063cd8 223
54310121 224Free_t
4f63d024 225Perl_safesysfree(Malloc_t where)
8d063cd8 226{
e8dda941 227#if defined(PERL_IMPLICIT_SYS) || defined(PERL_TRACK_MEMPOOL)
54aff467 228 dTHX;
97aff369
JH
229#else
230 dVAR;
155aba94 231#endif
97835f67 232 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 233 if (where) {
e8dda941
JD
234#ifdef PERL_TRACK_MEMPOOL
235 where = (Malloc_t)((char*)where-sTHX);
cd1541b2 236 {
7cb608b5
NC
237 struct perl_memory_debug_header *const header
238 = (struct perl_memory_debug_header *)where;
239
240 if (header->interpreter != aTHX) {
241 Perl_croak_nocontext("panic: free from wrong pool");
242 }
243 if (!header->prev) {
cd1541b2
NC
244 Perl_croak_nocontext("panic: duplicate free");
245 }
7cb608b5
NC
246 if (!(header->next) || header->next->prev != header
247 || header->prev->next != header) {
248 Perl_croak_nocontext("panic: bad free");
cd1541b2 249 }
7cb608b5
NC
250 /* Unlink us from the chain. */
251 header->next->prev = header->prev;
252 header->prev->next = header->next;
253# ifdef PERL_POISON
7e337ee0 254 PoisonNew(where, header->size, char);
cd1541b2 255# endif
7cb608b5
NC
256 /* Trigger the duplicate free warning. */
257 header->next = NULL;
258 }
e8dda941 259#endif
6ad3d225 260 PerlMem_free(where);
378cc40b 261 }
8d063cd8
LW
262}
263
f2517201 264/* safe version of system's calloc() */
1050c9ca 265
bd4080b3 266Malloc_t
4f63d024 267Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 268{
54aff467 269 dTHX;
bd4080b3 270 Malloc_t ptr;
ad7244db 271 MEM_SIZE total_size = 0;
1050c9ca 272
ad7244db 273 /* Even though calloc() for zero bytes is strange, be robust. */
19a94d75 274 if (size && (count <= MEM_SIZE_MAX / size))
ad7244db
JH
275 total_size = size * count;
276 else
277 Perl_croak_nocontext(PL_memory_wrap);
278#ifdef PERL_TRACK_MEMPOOL
19a94d75 279 if (sTHX <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
ad7244db
JH
280 total_size += sTHX;
281 else
282 Perl_croak_nocontext(PL_memory_wrap);
283#endif
55497cff 284#ifdef HAS_64K_LIMIT
e1a95402 285 if (total_size > 0xffff) {
bf49b057 286 PerlIO_printf(Perl_error_log,
e1a95402 287 "Allocation too large: %lx\n", total_size) FLUSH;
54aff467 288 my_exit(1);
5f05dabc 289 }
55497cff 290#endif /* HAS_64K_LIMIT */
1050c9ca
PP
291#ifdef DEBUGGING
292 if ((long)size < 0 || (long)count < 0)
4f63d024 293 Perl_croak_nocontext("panic: calloc");
1050c9ca 294#endif
e8dda941 295#ifdef PERL_TRACK_MEMPOOL
e1a95402
NC
296 /* Have to use malloc() because we've added some space for our tracking
297 header. */
ad7244db
JH
298 /* malloc(0) is non-portable. */
299 ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1);
e1a95402
NC
300#else
301 /* Use calloc() because it might save a memset() if the memory is fresh
302 and clean from the OS. */
ad7244db
JH
303 if (count && size)
304 ptr = (Malloc_t)PerlMem_calloc(count, size);
305 else /* calloc(0) is non-portable. */
306 ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1);
e8dda941 307#endif
da927450 308 PERL_ALLOC_CHECK(ptr);
e1a95402 309 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)total_size));
bd61b366 310 if (ptr != NULL) {
e8dda941 311#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
312 {
313 struct perl_memory_debug_header *const header
314 = (struct perl_memory_debug_header *)ptr;
315
e1a95402 316 memset((void*)ptr, 0, total_size);
7cb608b5
NC
317 header->interpreter = aTHX;
318 /* Link us into the list. */
319 header->prev = &PL_memory_debug_header;
320 header->next = PL_memory_debug_header.next;
321 PL_memory_debug_header.next = header;
322 header->next->prev = header;
cd1541b2 323# ifdef PERL_POISON
e1a95402 324 header->size = total_size;
cd1541b2 325# endif
7cb608b5
NC
326 ptr = (Malloc_t)((char*)ptr+sTHX);
327 }
e8dda941 328#endif
1050c9ca
PP
329 return ptr;
330 }
3280af22 331 else if (PL_nomemok)
bd61b366 332 return NULL;
0bd48802 333 return write_no_mem();
1050c9ca
PP
334}
335
cae6d0e5
GS
336/* These must be defined when not using Perl's malloc for binary
337 * compatibility */
338
339#ifndef MYMALLOC
340
341Malloc_t Perl_malloc (MEM_SIZE nbytes)
342{
343 dTHXs;
077a72a9 344 return (Malloc_t)PerlMem_malloc(nbytes);
cae6d0e5
GS
345}
346
347Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
348{
349 dTHXs;
077a72a9 350 return (Malloc_t)PerlMem_calloc(elements, size);
cae6d0e5
GS
351}
352
353Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
354{
355 dTHXs;
077a72a9 356 return (Malloc_t)PerlMem_realloc(where, nbytes);
cae6d0e5
GS
357}
358
359Free_t Perl_mfree (Malloc_t where)
360{
361 dTHXs;
362 PerlMem_free(where);
363}
364
365#endif
366
8d063cd8
LW
367/* copy a string up to some (non-backslashed) delimiter, if any */
368
369char *
e1ec3a88 370Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
8d063cd8 371{
fc36a67e 372 register I32 tolen;
96a5add6 373 PERL_UNUSED_CONTEXT;
35da51f7 374
7918f24d
NC
375 PERL_ARGS_ASSERT_DELIMCPY;
376
fc36a67e 377 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b 378 if (*from == '\\') {
35da51f7 379 if (from[1] != delim) {
fc36a67e
PP
380 if (to < toend)
381 *to++ = *from;
382 tolen++;
fc36a67e 383 }
35da51f7 384 from++;
378cc40b 385 }
bedebaa5 386 else if (*from == delim)
8d063cd8 387 break;
fc36a67e
PP
388 if (to < toend)
389 *to++ = *from;
8d063cd8 390 }
bedebaa5
CS
391 if (to < toend)
392 *to = '\0';
fc36a67e 393 *retlen = tolen;
73d840c0 394 return (char *)from;
8d063cd8
LW
395}
396
397/* return ptr to little string in big string, NULL if not found */
378cc40b 398/* This routine was donated by Corey Satten. */
8d063cd8
LW
399
400char *
864dbfa3 401Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 402{
79072805 403 register I32 first;
96a5add6 404 PERL_UNUSED_CONTEXT;
378cc40b 405
7918f24d
NC
406 PERL_ARGS_ASSERT_INSTR;
407
a687059c 408 if (!little)
08105a92 409 return (char*)big;
a687059c 410 first = *little++;
378cc40b 411 if (!first)
08105a92 412 return (char*)big;
378cc40b 413 while (*big) {
66a1b24b 414 register const char *s, *x;
378cc40b
LW
415 if (*big++ != first)
416 continue;
417 for (x=big,s=little; *s; /**/ ) {
418 if (!*x)
bd61b366 419 return NULL;
4fc877ac 420 if (*s != *x)
378cc40b 421 break;
4fc877ac
AL
422 else {
423 s++;
424 x++;
378cc40b
LW
425 }
426 }
427 if (!*s)
08105a92 428 return (char*)(big-1);
378cc40b 429 }
bd61b366 430 return NULL;
378cc40b 431}
8d063cd8 432
a687059c
LW
433/* same as instr but allow embedded nulls */
434
435char *
4c8626be 436Perl_ninstr(pTHX_ const char *big, const char *bigend, const char *little, const char *lend)
8d063cd8 437{
7918f24d 438 PERL_ARGS_ASSERT_NINSTR;
96a5add6 439 PERL_UNUSED_CONTEXT;
4c8626be
GA
440 if (little >= lend)
441 return (char*)big;
442 {
8ba22ff4 443 const char first = *little;
4c8626be 444 const char *s, *x;
8ba22ff4 445 bigend -= lend - little++;
4c8626be
GA
446 OUTER:
447 while (big <= bigend) {
b0ca24ee
JH
448 if (*big++ == first) {
449 for (x=big,s=little; s < lend; x++,s++) {
450 if (*s != *x)
451 goto OUTER;
452 }
453 return (char*)(big-1);
4c8626be 454 }
4c8626be 455 }
378cc40b 456 }
bd61b366 457 return NULL;
a687059c
LW
458}
459
460/* reverse of the above--find last substring */
461
462char *
864dbfa3 463Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 464{
08105a92 465 register const char *bigbeg;
e1ec3a88 466 register const I32 first = *little;
7452cf6a 467 register const char * const littleend = lend;
96a5add6 468 PERL_UNUSED_CONTEXT;
a687059c 469
7918f24d
NC
470 PERL_ARGS_ASSERT_RNINSTR;
471
260d78c9 472 if (little >= littleend)
08105a92 473 return (char*)bigend;
a687059c
LW
474 bigbeg = big;
475 big = bigend - (littleend - little++);
476 while (big >= bigbeg) {
66a1b24b 477 register const char *s, *x;
a687059c
LW
478 if (*big-- != first)
479 continue;
480 for (x=big+2,s=little; s < littleend; /**/ ) {
4fc877ac 481 if (*s != *x)
a687059c 482 break;
4fc877ac
AL
483 else {
484 x++;
485 s++;
a687059c
LW
486 }
487 }
488 if (s >= littleend)
08105a92 489 return (char*)(big+1);
378cc40b 490 }
bd61b366 491 return NULL;
378cc40b 492}
a687059c 493
cf93c79d
IZ
494/* As a space optimization, we do not compile tables for strings of length
495 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
496 special-cased in fbm_instr().
497
498 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
499
954c1994 500/*
ccfc67b7
JH
501=head1 Miscellaneous Functions
502
954c1994
GS
503=for apidoc fbm_compile
504
505Analyses the string in order to make fast searches on it using fbm_instr()
506-- the Boyer-Moore algorithm.
507
508=cut
509*/
510
378cc40b 511void
7506f9c3 512Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 513{
97aff369 514 dVAR;
0d46e09a 515 register const U8 *s;
79072805 516 register U32 i;
0b71040e 517 STRLEN len;
cb742848 518 U32 rarest = 0;
79072805
LW
519 U32 frequency = 256;
520
7918f24d
NC
521 PERL_ARGS_ASSERT_FBM_COMPILE;
522
c517dc2b 523 if (flags & FBMcf_TAIL) {
890ce7af 524 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
396482e1 525 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
c517dc2b
JH
526 if (mg && mg->mg_len >= 0)
527 mg->mg_len++;
528 }
9cbe880b 529 s = (U8*)SvPV_force_mutable(sv, len);
d1be9408 530 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 531 return;
cecf5685 532 SvUPGRADE(sv, SVt_PVGV);
78d0cf80 533 SvIOK_off(sv);
8eeaf79a
NC
534 SvNOK_off(sv);
535 SvVALID_on(sv);
02128f11 536 if (len > 2) {
9cbe880b 537 const unsigned char *sb;
66a1b24b 538 const U8 mlen = (len>255) ? 255 : (U8)len;
890ce7af 539 register U8 *table;
cf93c79d 540
d8419e03
NC
541 Sv_Grow(sv, len + 256 + PERL_FBM_TABLE_OFFSET);
542 table
543 = (unsigned char*)(SvPVX_mutable(sv) + len + PERL_FBM_TABLE_OFFSET);
544 s = table - 1 - PERL_FBM_TABLE_OFFSET; /* last char */
7506f9c3 545 memset((void*)table, mlen, 256);
02128f11 546 i = 0;
7506f9c3 547 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ
548 while (s >= sb) {
549 if (table[*s] == mlen)
7506f9c3 550 table[*s] = (U8)i;
cf93c79d
IZ
551 s--, i++;
552 }
d0688fc4
NC
553 } else {
554 Sv_Grow(sv, len + PERL_FBM_TABLE_OFFSET);
378cc40b 555 }
a0714e2c 556 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
378cc40b 557
9cbe880b 558 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 559 for (i = 0; i < len; i++) {
22c35a8c 560 if (PL_freq[s[i]] < frequency) {
bbce6d69 561 rarest = i;
22c35a8c 562 frequency = PL_freq[s[i]];
378cc40b
LW
563 }
564 }
610460f9 565 BmFLAGS(sv) = (U8)flags;
79072805 566 BmRARE(sv) = s[rarest];
44a10c71 567 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ
568 BmUSEFUL(sv) = 100; /* Initial value */
569 if (flags & FBMcf_TAIL)
570 SvTAIL_on(sv);
8eeaf79a
NC
571 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %lu\n",
572 BmRARE(sv),(unsigned long)BmPREVIOUS(sv)));
378cc40b
LW
573}
574
cf93c79d
IZ
575/* If SvTAIL(littlestr), it has a fake '\n' at end. */
576/* If SvTAIL is actually due to \Z or \z, this gives false positives
577 if multiline */
578
954c1994
GS
579/*
580=for apidoc fbm_instr
581
582Returns the location of the SV in the string delimited by C<str> and
bd61b366 583C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
954c1994
GS
584does not have to be fbm_compiled, but the search will not be as fast
585then.
586
587=cut
588*/
589
378cc40b 590char *
864dbfa3 591Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 592{
a687059c 593 register unsigned char *s;
cf93c79d 594 STRLEN l;
9cbe880b
NC
595 register const unsigned char *little
596 = (const unsigned char *)SvPV_const(littlestr,l);
cf93c79d 597 register STRLEN littlelen = l;
e1ec3a88 598 register const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 599
7918f24d
NC
600 PERL_ARGS_ASSERT_FBM_INSTR;
601
eb160463 602 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 603 if ( SvTAIL(littlestr)
eb160463 604 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 605 && (littlelen == 1
12ae5dfc 606 || (*big == *little &&
27da23d5 607 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d 608 return (char*)big;
bd61b366 609 return NULL;
cf93c79d 610 }
378cc40b 611
cf93c79d 612 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ
613
614 if (littlelen == 1) {
615 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
616 /* Know that bigend != big. */
617 if (bigend[-1] == '\n')
618 return (char *)(bigend - 1);
619 return (char *) bigend;
620 }
621 s = big;
622 while (s < bigend) {
623 if (*s == *little)
624 return (char *)s;
625 s++;
626 }
627 if (SvTAIL(littlestr))
628 return (char *) bigend;
bd61b366 629 return NULL;
cf93c79d
IZ
630 }
631 if (!littlelen)
632 return (char*)big; /* Cannot be SvTAIL! */
633
634 /* littlelen is 2 */
635 if (SvTAIL(littlestr) && !multiline) {
636 if (bigend[-1] == '\n' && bigend[-2] == *little)
637 return (char*)bigend - 2;
638 if (bigend[-1] == *little)
639 return (char*)bigend - 1;
bd61b366 640 return NULL;
cf93c79d
IZ
641 }
642 {
643 /* This should be better than FBM if c1 == c2, and almost
644 as good otherwise: maybe better since we do less indirection.
645 And we save a lot of memory by caching no table. */
66a1b24b
AL
646 const unsigned char c1 = little[0];
647 const unsigned char c2 = little[1];
cf93c79d
IZ
648
649 s = big + 1;
650 bigend--;
651 if (c1 != c2) {
652 while (s <= bigend) {
653 if (s[0] == c2) {
654 if (s[-1] == c1)
655 return (char*)s - 1;
656 s += 2;
657 continue;
3fe6f2dc 658 }
cf93c79d
IZ
659 next_chars:
660 if (s[0] == c1) {
661 if (s == bigend)
662 goto check_1char_anchor;
663 if (s[1] == c2)
664 return (char*)s;
665 else {
666 s++;
667 goto next_chars;
668 }
669 }
670 else
671 s += 2;
672 }
673 goto check_1char_anchor;
674 }
675 /* Now c1 == c2 */
676 while (s <= bigend) {
677 if (s[0] == c1) {
678 if (s[-1] == c1)
679 return (char*)s - 1;
680 if (s == bigend)
681 goto check_1char_anchor;
682 if (s[1] == c1)
683 return (char*)s;
684 s += 3;
02128f11 685 }
c277df42 686 else
cf93c79d 687 s += 2;
c277df42 688 }
c277df42 689 }
cf93c79d
IZ
690 check_1char_anchor: /* One char and anchor! */
691 if (SvTAIL(littlestr) && (*bigend == *little))
692 return (char *)bigend; /* bigend is already decremented. */
bd61b366 693 return NULL;
d48672a2 694 }
cf93c79d 695 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 696 s = bigend - littlelen;
a1d180c4 697 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ
698 /* Automatically of length > 2 */
699 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 700 {
bbce6d69 701 return (char*)s; /* how sweet it is */
7506f9c3
GS
702 }
703 if (s[1] == *little
704 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
705 {
cf93c79d 706 return (char*)s + 1; /* how sweet it is */
7506f9c3 707 }
bd61b366 708 return NULL;
02128f11 709 }
cecf5685 710 if (!SvVALID(littlestr)) {
c4420975 711 char * const b = ninstr((char*)big,(char*)bigend,
cf93c79d
IZ
712 (char*)little, (char*)little + littlelen);
713
714 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
715 /* Chop \n from littlestr: */
716 s = bigend - littlelen + 1;
7506f9c3
GS
717 if (*s == *little
718 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
719 {
3fe6f2dc 720 return (char*)s;
7506f9c3 721 }
bd61b366 722 return NULL;
a687059c 723 }
cf93c79d 724 return b;
a687059c 725 }
a1d180c4 726
3566a07d
NC
727 /* Do actual FBM. */
728 if (littlelen > (STRLEN)(bigend - big))
729 return NULL;
730
731 {
d8419e03
NC
732 register const unsigned char * const table
733 = little + littlelen + PERL_FBM_TABLE_OFFSET;
0d46e09a 734 register const unsigned char *oldlittle;
cf93c79d 735
cf93c79d
IZ
736 --littlelen; /* Last char found by table lookup */
737
738 s = big + littlelen;
739 little += littlelen; /* last char */
740 oldlittle = little;
741 if (s < bigend) {
742 register I32 tmp;
743
744 top2:
7506f9c3 745 if ((tmp = table[*s])) {
cf93c79d 746 if ((s += tmp) < bigend)
62b28dd9 747 goto top2;
cf93c79d
IZ
748 goto check_end;
749 }
750 else { /* less expensive than calling strncmp() */
66a1b24b 751 register unsigned char * const olds = s;
cf93c79d
IZ
752
753 tmp = littlelen;
754
755 while (tmp--) {
756 if (*--s == *--little)
757 continue;
cf93c79d
IZ
758 s = olds + 1; /* here we pay the price for failure */
759 little = oldlittle;
760 if (s < bigend) /* fake up continue to outer loop */
761 goto top2;
762 goto check_end;
763 }
764 return (char *)s;
a687059c 765 }
378cc40b 766 }
cf93c79d 767 check_end:
c8029a41 768 if ( s == bigend
8eeaf79a 769 && (BmFLAGS(littlestr) & FBMcf_TAIL)
12ae5dfc
JH
770 && memEQ((char *)(bigend - littlelen),
771 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d 772 return (char*)bigend - littlelen;
bd61b366 773 return NULL;
378cc40b 774 }
378cc40b
LW
775}
776
c277df42
IZ
777/* start_shift, end_shift are positive quantities which give offsets
778 of ends of some substring of bigstr.
a0288114 779 If "last" we want the last occurrence.
c277df42 780 old_posp is the way of communication between consequent calls if
a1d180c4 781 the next call needs to find the .
c277df42 782 The initial *old_posp should be -1.
cf93c79d
IZ
783
784 Note that we take into account SvTAIL, so one can get extra
785 optimizations if _ALL flag is set.
c277df42
IZ
786 */
787
cf93c79d 788/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 789 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ
790 is not supported yet. */
791
378cc40b 792char *
864dbfa3 793Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 794{
97aff369 795 dVAR;
0d46e09a 796 register const unsigned char *big;
79072805
LW
797 register I32 pos;
798 register I32 previous;
799 register I32 first;
0d46e09a 800 register const unsigned char *little;
c277df42 801 register I32 stop_pos;
0d46e09a 802 register const unsigned char *littleend;
c277df42 803 I32 found = 0;
378cc40b 804
7918f24d
NC
805 PERL_ARGS_ASSERT_SCREAMINSTR;
806
cecf5685
NC
807 assert(SvTYPE(littlestr) == SVt_PVGV);
808 assert(SvVALID(littlestr));
d372c834 809
c277df42 810 if (*old_posp == -1
3280af22 811 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ
812 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
813 cant_find:
a1d180c4 814 if ( BmRARE(littlestr) == '\n'
85c508c3 815 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
cfd0369c 816 little = (const unsigned char *)(SvPVX_const(littlestr));
cf93c79d
IZ
817 littleend = little + SvCUR(littlestr);
818 first = *little++;
819 goto check_tail;
820 }
bd61b366 821 return NULL;
cf93c79d
IZ
822 }
823
cfd0369c 824 little = (const unsigned char *)(SvPVX_const(littlestr));
79072805 825 littleend = little + SvCUR(littlestr);
378cc40b 826 first = *little++;
c277df42 827 /* The value of pos we can start at: */
79072805 828 previous = BmPREVIOUS(littlestr);
cfd0369c 829 big = (const unsigned char *)(SvPVX_const(bigstr));
c277df42
IZ
830 /* The value of pos we can stop at: */
831 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 832 if (previous + start_shift > stop_pos) {
0fe87f7c
HS
833/*
834 stop_pos does not include SvTAIL in the count, so this check is incorrect
835 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
836*/
837#if 0
cf93c79d
IZ
838 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
839 goto check_tail;
0fe87f7c 840#endif
bd61b366 841 return NULL;
cf93c79d 842 }
c277df42 843 while (pos < previous + start_shift) {
3280af22 844 if (!(pos += PL_screamnext[pos]))
cf93c79d 845 goto cant_find;
378cc40b 846 }
de3bb511 847 big -= previous;
bbce6d69 848 do {
0d46e09a 849 register const unsigned char *s, *x;
ef64f398 850 if (pos >= stop_pos) break;
bbce6d69
PP
851 if (big[pos] != first)
852 continue;
853 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69
PP
854 if (*s++ != *x++) {
855 s--;
856 break;
378cc40b 857 }
bbce6d69 858 }
c277df42
IZ
859 if (s == littleend) {
860 *old_posp = pos;
861 if (!last) return (char *)(big+pos);
862 found = 1;
863 }
3280af22 864 } while ( pos += PL_screamnext[pos] );
a1d180c4 865 if (last && found)
cf93c79d 866 return (char *)(big+(*old_posp));
cf93c79d
IZ
867 check_tail:
868 if (!SvTAIL(littlestr) || (end_shift > 0))
bd61b366 869 return NULL;
cf93c79d 870 /* Ignore the trailing "\n". This code is not microoptimized */
cfd0369c 871 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
cf93c79d
IZ
872 stop_pos = littleend - little; /* Actual littlestr len */
873 if (stop_pos == 0)
874 return (char*)big;
875 big -= stop_pos;
876 if (*big == first
12ae5dfc
JH
877 && ((stop_pos == 1) ||
878 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d 879 return (char*)big;
bd61b366 880 return NULL;
8d063cd8
LW
881}
882
79072805 883I32
864dbfa3 884Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 885{
e1ec3a88
AL
886 register const U8 *a = (const U8 *)s1;
887 register const U8 *b = (const U8 *)s2;
96a5add6
AL
888 PERL_UNUSED_CONTEXT;
889
7918f24d
NC
890 PERL_ARGS_ASSERT_IBCMP;
891
79072805 892 while (len--) {
22c35a8c 893 if (*a != *b && *a != PL_fold[*b])
bbce6d69
PP
894 return 1;
895 a++,b++;
896 }
897 return 0;
898}
899
900I32
864dbfa3 901Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 902{
27da23d5 903 dVAR;
e1ec3a88
AL
904 register const U8 *a = (const U8 *)s1;
905 register const U8 *b = (const U8 *)s2;
96a5add6
AL
906 PERL_UNUSED_CONTEXT;
907
7918f24d
NC
908 PERL_ARGS_ASSERT_IBCMP_LOCALE;
909
bbce6d69 910 while (len--) {
22c35a8c 911 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69
PP
912 return 1;
913 a++,b++;
79072805
LW
914 }
915 return 0;
916}
917
8d063cd8
LW
918/* copy a string to a safe spot */
919
954c1994 920/*
ccfc67b7
JH
921=head1 Memory Management
922
954c1994
GS
923=for apidoc savepv
924
61a925ed
AMS
925Perl's version of C<strdup()>. Returns a pointer to a newly allocated
926string which is a duplicate of C<pv>. The size of the string is
927determined by C<strlen()>. The memory allocated for the new string can
928be freed with the C<Safefree()> function.
954c1994
GS
929
930=cut
931*/
932
8d063cd8 933char *
efdfce31 934Perl_savepv(pTHX_ const char *pv)
8d063cd8 935{
96a5add6 936 PERL_UNUSED_CONTEXT;
e90e2364 937 if (!pv)
bd61b366 938 return NULL;
66a1b24b
AL
939 else {
940 char *newaddr;
941 const STRLEN pvlen = strlen(pv)+1;
10edeb5d
JH
942 Newx(newaddr, pvlen, char);
943 return (char*)memcpy(newaddr, pv, pvlen);
66a1b24b 944 }
8d063cd8
LW
945}
946
a687059c
LW
947/* same thing but with a known length */
948
954c1994
GS
949/*
950=for apidoc savepvn
951
61a925ed
AMS
952Perl's version of what C<strndup()> would be if it existed. Returns a
953pointer to a newly allocated string which is a duplicate of the first
cbf82dd0
NC
954C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
955the new string can be freed with the C<Safefree()> function.
954c1994
GS
956
957=cut
958*/
959
a687059c 960char *
efdfce31 961Perl_savepvn(pTHX_ const char *pv, register I32 len)
a687059c
LW
962{
963 register char *newaddr;
96a5add6 964 PERL_UNUSED_CONTEXT;
a687059c 965
a02a5408 966 Newx(newaddr,len+1,char);
92110913 967 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 968 if (pv) {
e90e2364
NC
969 /* might not be null terminated */
970 newaddr[len] = '\0';
07409e01 971 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS
972 }
973 else {
07409e01 974 return (char *) ZeroD(newaddr,len+1,char);
92110913 975 }
a687059c
LW
976}
977
05ec9bb3
NIS
978/*
979=for apidoc savesharedpv
980
61a925ed
AMS
981A version of C<savepv()> which allocates the duplicate string in memory
982which is shared between threads.
05ec9bb3
NIS
983
984=cut
985*/
986char *
efdfce31 987Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 988{
e90e2364 989 register char *newaddr;
490a0e98 990 STRLEN pvlen;
e90e2364 991 if (!pv)
bd61b366 992 return NULL;
e90e2364 993
490a0e98
NC
994 pvlen = strlen(pv)+1;
995 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364 996 if (!newaddr) {
0bd48802 997 return write_no_mem();
05ec9bb3 998 }
10edeb5d 999 return (char*)memcpy(newaddr, pv, pvlen);
05ec9bb3
NIS
1000}
1001
2e0de35c 1002/*
d9095cec
NC
1003=for apidoc savesharedpvn
1004
1005A version of C<savepvn()> which allocates the duplicate string in memory
1006which is shared between threads. (With the specific difference that a NULL
1007pointer is not acceptable)
1008
1009=cut
1010*/
1011char *
1012Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
1013{
1014 char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
7918f24d
NC
1015
1016 PERL_ARGS_ASSERT_SAVESHAREDPVN;
1017
d9095cec
NC
1018 if (!newaddr) {
1019 return write_no_mem();
1020 }
1021 newaddr[len] = '\0';
1022 return (char*)memcpy(newaddr, pv, len);
1023}
1024
1025/*
2e0de35c
NC
1026=for apidoc savesvpv
1027
6832267f 1028A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC
1029the passed in SV using C<SvPV()>
1030
1031=cut
1032*/
1033
1034char *
1035Perl_savesvpv(pTHX_ SV *sv)
1036{
1037 STRLEN len;
7452cf6a 1038 const char * const pv = SvPV_const(sv, len);
2e0de35c
NC
1039 register char *newaddr;
1040
7918f24d
NC
1041 PERL_ARGS_ASSERT_SAVESVPV;
1042
26866f99 1043 ++len;
a02a5408 1044 Newx(newaddr,len,char);
07409e01 1045 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 1046}
05ec9bb3
NIS
1047
1048
cea2e8a9 1049/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 1050
76e3520e 1051STATIC SV *
cea2e8a9 1052S_mess_alloc(pTHX)
fc36a67e 1053{
97aff369 1054 dVAR;
fc36a67e
PP
1055 SV *sv;
1056 XPVMG *any;
1057
e72dc28c 1058 if (!PL_dirty)
84bafc02 1059 return newSVpvs_flags("", SVs_TEMP);
e72dc28c 1060
0372dbb6
GS
1061 if (PL_mess_sv)
1062 return PL_mess_sv;
1063
fc36a67e 1064 /* Create as PVMG now, to avoid any upgrading later */
a02a5408
JC
1065 Newx(sv, 1, SV);
1066 Newxz(any, 1, XPVMG);
fc36a67e
PP
1067 SvFLAGS(sv) = SVt_PVMG;
1068 SvANY(sv) = (void*)any;
6136c704 1069 SvPV_set(sv, NULL);
fc36a67e 1070 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 1071 PL_mess_sv = sv;
fc36a67e
PP
1072 return sv;
1073}
1074
c5be433b 1075#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1076char *
1077Perl_form_nocontext(const char* pat, ...)
1078{
1079 dTHX;
c5be433b 1080 char *retval;
cea2e8a9 1081 va_list args;
7918f24d 1082 PERL_ARGS_ASSERT_FORM_NOCONTEXT;
cea2e8a9 1083 va_start(args, pat);
c5be433b 1084 retval = vform(pat, &args);
cea2e8a9 1085 va_end(args);
c5be433b 1086 return retval;
cea2e8a9 1087}
c5be433b 1088#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1089
7c9e965c 1090/*
ccfc67b7 1091=head1 Miscellaneous Functions
7c9e965c
JP
1092=for apidoc form
1093
1094Takes a sprintf-style format pattern and conventional
1095(non-SV) arguments and returns the formatted string.
1096
1097 (char *) Perl_form(pTHX_ const char* pat, ...)
1098
1099can be used any place a string (char *) is required:
1100
1101 char * s = Perl_form("%d.%d",major,minor);
1102
1103Uses a single private buffer so if you want to format several strings you
1104must explicitly copy the earlier strings away (and free the copies when you
1105are done).
1106
1107=cut
1108*/
1109
8990e307 1110char *
864dbfa3 1111Perl_form(pTHX_ const char* pat, ...)
8990e307 1112{
c5be433b 1113 char *retval;
46fc3d4c 1114 va_list args;
7918f24d 1115 PERL_ARGS_ASSERT_FORM;
46fc3d4c 1116 va_start(args, pat);
c5be433b 1117 retval = vform(pat, &args);
46fc3d4c 1118 va_end(args);
c5be433b
GS
1119 return retval;
1120}
1121
1122char *
1123Perl_vform(pTHX_ const char *pat, va_list *args)
1124{
2d03de9c 1125 SV * const sv = mess_alloc();
7918f24d 1126 PERL_ARGS_ASSERT_VFORM;
4608196e 1127 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
e72dc28c 1128 return SvPVX(sv);
46fc3d4c 1129}
a687059c 1130
5a844595
GS
1131#if defined(PERL_IMPLICIT_CONTEXT)
1132SV *
1133Perl_mess_nocontext(const char *pat, ...)
1134{
1135 dTHX;
1136 SV *retval;
1137 va_list args;
7918f24d 1138 PERL_ARGS_ASSERT_MESS_NOCONTEXT;
5a844595
GS
1139 va_start(args, pat);
1140 retval = vmess(pat, &args);
1141 va_end(args);
1142 return retval;
1143}
1144#endif /* PERL_IMPLICIT_CONTEXT */
1145
06bf62c7 1146SV *
5a844595
GS
1147Perl_mess(pTHX_ const char *pat, ...)
1148{
1149 SV *retval;
1150 va_list args;
7918f24d 1151 PERL_ARGS_ASSERT_MESS;
5a844595
GS
1152 va_start(args, pat);
1153 retval = vmess(pat, &args);
1154 va_end(args);
1155 return retval;
1156}
1157
5f66b61c
AL
1158STATIC const COP*
1159S_closest_cop(pTHX_ const COP *cop, const OP *o)
ae7d165c 1160{
97aff369 1161 dVAR;
ae7d165c
PJ
1162 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1163
7918f24d
NC
1164 PERL_ARGS_ASSERT_CLOSEST_COP;
1165
fabdb6c0
AL
1166 if (!o || o == PL_op)
1167 return cop;
ae7d165c
PJ
1168
1169 if (o->op_flags & OPf_KIDS) {
5f66b61c 1170 const OP *kid;
fabdb6c0 1171 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
5f66b61c 1172 const COP *new_cop;
ae7d165c
PJ
1173
1174 /* If the OP_NEXTSTATE has been optimised away we can still use it
1175 * the get the file and line number. */
1176
1177 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
5f66b61c 1178 cop = (const COP *)kid;
ae7d165c
PJ
1179
1180 /* Keep searching, and return when we've found something. */
1181
1182 new_cop = closest_cop(cop, kid);
fabdb6c0
AL
1183 if (new_cop)
1184 return new_cop;
ae7d165c
PJ
1185 }
1186 }
1187
1188 /* Nothing found. */
1189
5f66b61c 1190 return NULL;
ae7d165c
PJ
1191}
1192
5a844595
GS
1193SV *
1194Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1195{
97aff369 1196 dVAR;
c4420975 1197 SV * const sv = mess_alloc();
46fc3d4c 1198
7918f24d
NC
1199 PERL_ARGS_ASSERT_VMESS;
1200
5f66b61c 1201 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
46fc3d4c 1202 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ
1203 /*
1204 * Try and find the file and line for PL_op. This will usually be
1205 * PL_curcop, but it might be a cop that has been optimised away. We
1206 * can try to find such a cop by searching through the optree starting
1207 * from the sibling of PL_curcop.
1208 */
1209
e1ec3a88 1210 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
5f66b61c
AL
1211 if (!cop)
1212 cop = PL_curcop;
ae7d165c
PJ
1213
1214 if (CopLINE(cop))
ed094faf 1215 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
3aed30dc 1216 OutCopFILE(cop), (IV)CopLINE(cop));
191f87d5
DH
1217 /* Seems that GvIO() can be untrustworthy during global destruction. */
1218 if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO)
1219 && IoLINES(GvIOp(PL_last_in_gv)))
1220 {
e1ec3a88 1221 const bool line_mode = (RsSIMPLE(PL_rs) &&
95a20fc0 1222 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
57def98f 1223 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
5f66b61c 1224 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
edc2eac3
JH
1225 line_mode ? "line" : "chunk",
1226 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1227 }
5f66b61c
AL
1228 if (PL_dirty)
1229 sv_catpvs(sv, " during global destruction");
1230 sv_catpvs(sv, ".\n");
a687059c 1231 }
06bf62c7 1232 return sv;
a687059c
LW
1233}
1234
7ff03255
SG
1235void
1236Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1237{
27da23d5 1238 dVAR;
7ff03255
SG
1239 IO *io;
1240 MAGIC *mg;
1241
7918f24d
NC
1242 PERL_ARGS_ASSERT_WRITE_TO_STDERR;
1243
7ff03255
SG
1244 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1245 && (io = GvIO(PL_stderrgv))
daba3364 1246 && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
7ff03255
SG
1247 {
1248 dSP;
1249 ENTER;
1250 SAVETMPS;
1251
1252 save_re_context();
1253 SAVESPTR(PL_stderrgv);
a0714e2c 1254 PL_stderrgv = NULL;
7ff03255
SG
1255
1256 PUSHSTACKi(PERLSI_MAGIC);
1257
1258 PUSHMARK(SP);
1259 EXTEND(SP,2);
daba3364 1260 PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
6e449a3a 1261 mPUSHp(message, msglen);
7ff03255
SG
1262 PUTBACK;
1263 call_method("PRINT", G_SCALAR);
1264
1265 POPSTACK;
1266 FREETMPS;
1267 LEAVE;
1268 }
1269 else {
1270#ifdef USE_SFIO
1271 /* SFIO can really mess with your errno */
53c1dcc0 1272 const int e = errno;
7ff03255 1273#endif
53c1dcc0 1274 PerlIO * const serr = Perl_error_log;
7ff03255
SG
1275
1276 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1277 (void)PerlIO_flush(serr);
1278#ifdef USE_SFIO
1279 errno = e;
1280#endif
1281 }
1282}
1283
46d9c920 1284/* Common code used by vcroak, vdie, vwarn and vwarner */
3ab1ac99 1285
46d9c920
NC
1286STATIC bool
1287S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
63315e18 1288{
97aff369 1289 dVAR;
63315e18
NC
1290 HV *stash;
1291 GV *gv;
1292 CV *cv;
46d9c920
NC
1293 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1294 /* sv_2cv might call Perl_croak() or Perl_warner() */
1295 SV * const oldhook = *hook;
1296
1297 assert(oldhook);
63315e18 1298
63315e18 1299 ENTER;
46d9c920
NC
1300 SAVESPTR(*hook);
1301 *hook = NULL;
1302 cv = sv_2cv(oldhook, &stash, &gv, 0);
63315e18
NC
1303 LEAVE;
1304 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1305 dSP;
1306 SV *msg;
1307
1308 ENTER;
1309 save_re_context();
46d9c920
NC
1310 if (warn) {
1311 SAVESPTR(*hook);
1312 *hook = NULL;
1313 }
1314 if (warn || message) {
740cce10 1315 msg = newSVpvn_flags(message, msglen, utf8);
63315e18
NC
1316 SvREADONLY_on(msg);
1317 SAVEFREESV(msg);
1318 }
1319 else {
1320 msg = ERRSV;
1321 }
1322
46d9c920 1323 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
63315e18
NC
1324 PUSHMARK(SP);
1325 XPUSHs(msg);
1326 PUTBACK;
daba3364 1327 call_sv(MUTABLE_SV(cv), G_DISCARD);
63315e18
NC
1328 POPSTACK;
1329 LEAVE;
46d9c920 1330 return TRUE;
63315e18 1331 }
46d9c920 1332 return FALSE;
63315e18
NC
1333}
1334
cfd0369c 1335STATIC const char *
e07360fa
AT
1336S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1337 I32* utf8)
1338{
1339 dVAR;
cfd0369c 1340 const char *message;
e07360fa
AT
1341
1342 if (pat) {
890ce7af 1343 SV * const msv = vmess(pat, args);
e07360fa
AT
1344 if (PL_errors && SvCUR(PL_errors)) {
1345 sv_catsv(PL_errors, msv);
cfd0369c 1346 message = SvPV_const(PL_errors, *msglen);
e07360fa
AT
1347 SvCUR_set(PL_errors, 0);
1348 }
1349 else
cfd0369c 1350 message = SvPV_const(msv,*msglen);
e07360fa
AT
1351 *utf8 = SvUTF8(msv);
1352 }
1353 else {
bd61b366 1354 message = NULL;
e07360fa
AT
1355 }
1356
e07360fa 1357 if (PL_diehook) {
46d9c920 1358 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
e07360fa
AT
1359 }
1360 return message;
1361}
1362
c5be433b
GS
1363OP *
1364Perl_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1365{
97aff369 1366 dVAR;
73d840c0 1367 const char *message;
e1ec3a88 1368 const int was_in_eval = PL_in_eval;
06bf62c7 1369 STRLEN msglen;
ff882698 1370 I32 utf8 = 0;
36477c24 1371
890ce7af 1372 message = vdie_croak_common(pat, args, &msglen, &utf8);
36477c24 1373
06bf62c7 1374 PL_restartop = die_where(message, msglen);
ff882698 1375 SvFLAGS(ERRSV) |= utf8;
3280af22 1376 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1377 JMPENV_JUMP(3);
3280af22 1378 return PL_restartop;
36477c24
PP
1379}
1380
c5be433b 1381#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1382OP *
1383Perl_die_nocontext(const char* pat, ...)
a687059c 1384{
cea2e8a9
GS
1385 dTHX;
1386 OP *o;
a687059c 1387 va_list args;
7918f24d 1388 PERL_ARGS_ASSERT_DIE_NOCONTEXT;
cea2e8a9 1389 va_start(args, pat);
c5be433b 1390 o = vdie(pat, &args);
cea2e8a9
GS
1391 va_end(args);
1392 return o;
1393}
c5be433b 1394#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS
1395
1396OP *
1397Perl_die(pTHX_ const char* pat, ...)
1398{
1399 OP *o;
1400 va_list args;
1401 va_start(args, pat);
c5be433b 1402 o = vdie(pat, &args);
cea2e8a9
GS
1403 va_end(args);
1404 return o;
1405}
1406
c5be433b
GS
1407void
1408Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1409{
97aff369 1410 dVAR;
73d840c0 1411 const char *message;
06bf62c7 1412 STRLEN msglen;
ff882698 1413 I32 utf8 = 0;
a687059c 1414
3ab1ac99 1415 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
5a844595 1416
3280af22 1417 if (PL_in_eval) {
06bf62c7 1418 PL_restartop = die_where(message, msglen);
ff882698 1419 SvFLAGS(ERRSV) |= utf8;
6224f72b 1420 JMPENV_JUMP(3);
a0d0e21e 1421 }
84414e3e 1422 else if (!message)
cfd0369c 1423 message = SvPVx_const(ERRSV, msglen);
84414e3e 1424
7ff03255 1425 write_to_stderr(message, msglen);
f86702cc 1426 my_failure_exit();
a687059c
LW
1427}
1428
c5be433b 1429#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1430void
cea2e8a9 1431Perl_croak_nocontext(const char *pat, ...)
a687059c 1432{
cea2e8a9 1433 dTHX;
a687059c 1434 va_list args;
cea2e8a9 1435 va_start(args, pat);
c5be433b 1436 vcroak(pat, &args);
cea2e8a9
GS
1437 /* NOTREACHED */
1438 va_end(args);
1439}
1440#endif /* PERL_IMPLICIT_CONTEXT */
1441
954c1994 1442/*
ccfc67b7
JH
1443=head1 Warning and Dieing
1444
954c1994
GS
1445=for apidoc croak
1446
9983fa3c 1447This is the XSUB-writer's interface to Perl's C<die> function.
966353fd
MF
1448Normally call this function the same way you call the C C<printf>
1449function. Calling C<croak> returns control directly to Perl,
1450sidestepping the normal C order of execution. See C<warn>.
9983fa3c
GS
1451
1452If you want to throw an exception object, assign the object to
bd61b366 1453C<$@> and then pass C<NULL> to croak():
9983fa3c
GS
1454
1455 errsv = get_sv("@", TRUE);
1456 sv_setsv(errsv, exception_object);
bd61b366 1457 croak(NULL);
954c1994
GS
1458
1459=cut
1460*/
1461
cea2e8a9
GS
1462void
1463Perl_croak(pTHX_ const char *pat, ...)
1464{
1465 va_list args;
1466 va_start(args, pat);
c5be433b 1467 vcroak(pat, &args);
cea2e8a9
GS
1468 /* NOTREACHED */
1469 va_end(args);
1470}
1471
c5be433b
GS
1472void
1473Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1474{
27da23d5 1475 dVAR;
06bf62c7 1476 STRLEN msglen;
53c1dcc0
AL
1477 SV * const msv = vmess(pat, args);
1478 const I32 utf8 = SvUTF8(msv);
1479 const char * const message = SvPV_const(msv, msglen);
a687059c 1480
7918f24d
NC
1481 PERL_ARGS_ASSERT_VWARN;
1482
3280af22 1483 if (PL_warnhook) {
46d9c920 1484 if (vdie_common(message, msglen, utf8, TRUE))
20cec16a 1485 return;
748a9306 1486 }
87582a92 1487
7ff03255 1488 write_to_stderr(message, msglen);
a687059c 1489}
8d063cd8 1490
c5be433b 1491#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1492void
1493Perl_warn_nocontext(const char *pat, ...)
1494{
1495 dTHX;
1496 va_list args;
7918f24d 1497 PERL_ARGS_ASSERT_WARN_NOCONTEXT;
cea2e8a9 1498 va_start(args, pat);
c5be433b 1499 vwarn(pat, &args);
cea2e8a9
GS
1500 va_end(args);
1501}
1502#endif /* PERL_IMPLICIT_CONTEXT */
1503
954c1994
GS
1504/*
1505=for apidoc warn
1506
966353fd
MF
1507This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1508function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS
1509
1510=cut
1511*/
1512
cea2e8a9
GS
1513void
1514Perl_warn(pTHX_ const char *pat, ...)
1515{
1516 va_list args;
7918f24d 1517 PERL_ARGS_ASSERT_WARN;
cea2e8a9 1518 va_start(args, pat);
c5be433b 1519 vwarn(pat, &args);
cea2e8a9
GS
1520 va_end(args);
1521}
1522
c5be433b
GS
1523#if defined(PERL_IMPLICIT_CONTEXT)
1524void
1525Perl_warner_nocontext(U32 err, const char *pat, ...)
1526{
27da23d5 1527 dTHX;
c5be433b 1528 va_list args;
7918f24d 1529 PERL_ARGS_ASSERT_WARNER_NOCONTEXT;
c5be433b
GS
1530 va_start(args, pat);
1531 vwarner(err, pat, &args);
1532 va_end(args);
1533}
1534#endif /* PERL_IMPLICIT_CONTEXT */
1535
599cee73 1536void
864dbfa3 1537Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM
1538{
1539 va_list args;
7918f24d 1540 PERL_ARGS_ASSERT_WARNER;
c5be433b
GS
1541 va_start(args, pat);
1542 vwarner(err, pat, &args);
1543 va_end(args);
1544}
1545
1546void
1547Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1548{
27da23d5 1549 dVAR;
7918f24d 1550 PERL_ARGS_ASSERT_VWARNER;
5f2d9966 1551 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
a3b680e6 1552 SV * const msv = vmess(pat, args);
d13b0d77 1553 STRLEN msglen;
7452cf6a 1554 const char * const message = SvPV_const(msv, msglen);
a3b680e6 1555 const I32 utf8 = SvUTF8(msv);
599cee73 1556
3aed30dc 1557 if (PL_diehook) {
63315e18 1558 assert(message);
46d9c920 1559 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
3aed30dc
HS
1560 }
1561 if (PL_in_eval) {
1562 PL_restartop = die_where(message, msglen);
ff882698 1563 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS
1564 JMPENV_JUMP(3);
1565 }
7ff03255 1566 write_to_stderr(message, msglen);
3aed30dc 1567 my_failure_exit();
599cee73
PM
1568 }
1569 else {
d13b0d77 1570 Perl_vwarn(aTHX_ pat, args);
599cee73
PM
1571 }
1572}
1573
f54ba1c2
DM
1574/* implements the ckWARN? macros */
1575
1576bool
1577Perl_ckwarn(pTHX_ U32 w)
1578{
97aff369 1579 dVAR;
f54ba1c2
DM
1580 return
1581 (
1582 isLEXWARN_on
1583 && PL_curcop->cop_warnings != pWARN_NONE
1584 && (
1585 PL_curcop->cop_warnings == pWARN_ALL
1586 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1587 || (unpackWARN2(w) &&
1588 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1589 || (unpackWARN3(w) &&
1590 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1591 || (unpackWARN4(w) &&
1592 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1593 )
1594 )
1595 ||
1596 (
1597 isLEXWARN_off && PL_dowarn & G_WARN_ON
1598 )
1599 ;
1600}
1601
1602/* implements the ckWARN?_d macro */
1603
1604bool
1605Perl_ckwarn_d(pTHX_ U32 w)
1606{
97aff369 1607 dVAR;
f54ba1c2
DM
1608 return
1609 isLEXWARN_off
1610 || PL_curcop->cop_warnings == pWARN_ALL
1611 || (
1612 PL_curcop->cop_warnings != pWARN_NONE
1613 && (
1614 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1615 || (unpackWARN2(w) &&
1616 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1617 || (unpackWARN3(w) &&
1618 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1619 || (unpackWARN4(w) &&
1620 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1621 )
1622 )
1623 ;
1624}
1625
72dc9ed5
NC
1626/* Set buffer=NULL to get a new one. */
1627STRLEN *
8ee4cf24 1628Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
72dc9ed5
NC
1629 STRLEN size) {
1630 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
35da51f7 1631 PERL_UNUSED_CONTEXT;
7918f24d 1632 PERL_ARGS_ASSERT_NEW_WARNINGS_BITFIELD;
72dc9ed5 1633
10edeb5d
JH
1634 buffer = (STRLEN*)
1635 (specialWARN(buffer) ?
1636 PerlMemShared_malloc(len_wanted) :
1637 PerlMemShared_realloc(buffer, len_wanted));
72dc9ed5
NC
1638 buffer[0] = size;
1639 Copy(bits, (buffer + 1), size, char);
1640 return buffer;
1641}
f54ba1c2 1642
e6587932
DM
1643/* since we've already done strlen() for both nam and val
1644 * we can use that info to make things faster than
1645 * sprintf(s, "%s=%s", nam, val)
1646 */
1647#define my_setenv_format(s, nam, nlen, val, vlen) \
1648 Copy(nam, s, nlen, char); \
1649 *(s+nlen) = '='; \
1650 Copy(val, s+(nlen+1), vlen, char); \
1651 *(s+(nlen+1+vlen)) = '\0'
1652
c5d12488
JH
1653#ifdef USE_ENVIRON_ARRAY
1654 /* VMS' my_setenv() is in vms.c */
1655#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1656void
e1ec3a88 1657Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1658{
27da23d5 1659 dVAR;
4efc5df6
GS
1660#ifdef USE_ITHREADS
1661 /* only parent thread can modify process environment */
1662 if (PL_curinterp == aTHX)
1663#endif
1664 {
f2517201 1665#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1666 if (!PL_use_safe_putenv) {
c5d12488
JH
1667 /* most putenv()s leak, so we manipulate environ directly */
1668 register I32 i=setenv_getix(nam); /* where does it go? */
1669 int nlen, vlen;
1670
1671 if (environ == PL_origenviron) { /* need we copy environment? */
1672 I32 j;
1673 I32 max;
1674 char **tmpenv;
1675
1676 max = i;
1677 while (environ[max])
1678 max++;
1679 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1680 for (j=0; j<max; j++) { /* copy environment */
1681 const int len = strlen(environ[j]);
1682 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1683 Copy(environ[j], tmpenv[j], len+1, char);
1684 }
1685 tmpenv[max] = NULL;
1686 environ = tmpenv; /* tell exec where it is now */
1687 }
1688 if (!val) {
1689 safesysfree(environ[i]);
1690 while (environ[i]) {
1691 environ[i] = environ[i+1];
1692 i++;
a687059c 1693 }
c5d12488
JH
1694 return;
1695 }
1696 if (!environ[i]) { /* does not exist yet */
1697 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1698 environ[i+1] = NULL; /* make sure it's null terminated */
1699 }
1700 else
1701 safesysfree(environ[i]);
1702 nlen = strlen(nam);
1703 vlen = strlen(val);
1704
1705 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1706 /* all that work just for this */
1707 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95 1708 } else {
c5d12488 1709# endif
7ee146b1 1710# if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
88f5bc07
AB
1711# if defined(HAS_UNSETENV)
1712 if (val == NULL) {
1713 (void)unsetenv(nam);
1714 } else {
1715 (void)setenv(nam, val, 1);
1716 }
1717# else /* ! HAS_UNSETENV */
1718 (void)setenv(nam, val, 1);
1719# endif /* HAS_UNSETENV */
47dafe4d 1720# else
88f5bc07
AB
1721# if defined(HAS_UNSETENV)
1722 if (val == NULL) {
1723 (void)unsetenv(nam);
1724 } else {
c4420975
AL
1725 const int nlen = strlen(nam);
1726 const int vlen = strlen(val);
1727 char * const new_env =
88f5bc07
AB
1728 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1729 my_setenv_format(new_env, nam, nlen, val, vlen);
1730 (void)putenv(new_env);
1731 }
1732# else /* ! HAS_UNSETENV */
1733 char *new_env;
c4420975
AL
1734 const int nlen = strlen(nam);
1735 int vlen;
88f5bc07
AB
1736 if (!val) {
1737 val = "";
1738 }
1739 vlen = strlen(val);
1740 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1741 /* all that work just for this */
1742 my_setenv_format(new_env, nam, nlen, val, vlen);
1743 (void)putenv(new_env);
1744# endif /* HAS_UNSETENV */
47dafe4d 1745# endif /* __CYGWIN__ */
50acdf95
MS
1746#ifndef PERL_USE_SAFE_PUTENV
1747 }
1748#endif
4efc5df6 1749 }
8d063cd8
LW
1750}
1751
c5d12488 1752#else /* WIN32 || NETWARE */
68dc0745
PP
1753
1754void
72229eff 1755Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1756{
27da23d5 1757 dVAR;
c5d12488
JH
1758 register char *envstr;
1759 const int nlen = strlen(nam);
1760 int vlen;
e6587932 1761
c5d12488
JH
1762 if (!val) {
1763 val = "";
ac5c734f 1764 }
c5d12488
JH
1765 vlen = strlen(val);
1766 Newx(envstr, nlen+vlen+2, char);
1767 my_setenv_format(envstr, nam, nlen, val, vlen);
1768 (void)PerlEnv_putenv(envstr);
1769 Safefree(envstr);
3e3baf6d
TB
1770}
1771
c5d12488 1772#endif /* WIN32 || NETWARE */
3e3baf6d 1773
c5d12488 1774#ifndef PERL_MICRO
3e3baf6d 1775I32
e1ec3a88 1776Perl_setenv_getix(pTHX_ const char *nam)
3e3baf6d 1777{
c5d12488 1778 register I32 i;
0d46e09a 1779 register const I32 len = strlen(nam);
7918f24d
NC
1780
1781 PERL_ARGS_ASSERT_SETENV_GETIX;
96a5add6 1782 PERL_UNUSED_CONTEXT;
3e3baf6d
TB
1783
1784 for (i = 0; environ[i]; i++) {
1785 if (
1786#ifdef WIN32
1787 strnicmp(environ[i],nam,len) == 0
1788#else
1789 strnEQ(environ[i],nam,len)
1790#endif
1791 && environ[i][len] == '=')
1792 break; /* strnEQ must come first to avoid */
1793 } /* potential SEGV's */
1794 return i;
68dc0745 1795}
c5d12488 1796#endif /* !PERL_MICRO */
68dc0745 1797
c5d12488 1798#endif /* !VMS && !EPOC*/
378cc40b 1799
16d20bd9 1800#ifdef UNLINK_ALL_VERSIONS
79072805 1801I32
6e732051 1802Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 1803{
35da51f7 1804 I32 retries = 0;
378cc40b 1805
7918f24d
NC
1806 PERL_ARGS_ASSERT_UNLNK;
1807
35da51f7
AL
1808 while (PerlLIO_unlink(f) >= 0)
1809 retries++;
1810 return retries ? 0 : -1;
378cc40b
LW
1811}
1812#endif
1813
7a3f2258 1814/* this is a drop-in replacement for bcopy() */
2253333f 1815#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1816char *
7a3f2258 1817Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b 1818{
2d03de9c 1819 char * const retval = to;
378cc40b 1820
7918f24d
NC
1821 PERL_ARGS_ASSERT_MY_BCOPY;
1822
7c0587c8
LW
1823 if (from - to >= 0) {
1824 while (len--)
1825 *to++ = *from++;
1826 }
1827 else {
1828 to += len;
1829 from += len;
1830 while (len--)
faf8582f 1831 *(--to) = *(--from);
7c0587c8 1832 }
378cc40b
LW
1833 return retval;
1834}
ffed7fef 1835#endif
378cc40b 1836
7a3f2258 1837/* this is a drop-in replacement for memset() */
fc36a67e
PP
1838#ifndef HAS_MEMSET
1839void *
7a3f2258 1840Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1841{
2d03de9c 1842 char * const retval = loc;
fc36a67e 1843
7918f24d
NC
1844 PERL_ARGS_ASSERT_MY_MEMSET;
1845
fc36a67e
PP
1846 while (len--)
1847 *loc++ = ch;
1848 return retval;
1849}
1850#endif
1851
7a3f2258 1852/* this is a drop-in replacement for bzero() */
7c0587c8 1853#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1854char *
7a3f2258 1855Perl_my_bzero(register char *loc, register I32 len)
378cc40b 1856{
2d03de9c 1857 char * const retval = loc;
378cc40b 1858
7918f24d
NC
1859 PERL_ARGS_ASSERT_MY_BZERO;
1860
378cc40b
LW
1861 while (len--)
1862 *loc++ = 0;
1863 return retval;
1864}
1865#endif
7c0587c8 1866
7a3f2258 1867/* this is a drop-in replacement for memcmp() */
36477c24 1868#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1869I32
7a3f2258 1870Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1871{
e1ec3a88
AL
1872 register const U8 *a = (const U8 *)s1;
1873 register const U8 *b = (const U8 *)s2;
79072805 1874 register I32 tmp;
7c0587c8 1875
7918f24d
NC
1876 PERL_ARGS_ASSERT_MY_MEMCMP;
1877
7c0587c8 1878 while (len--) {
27da23d5 1879 if ((tmp = *a++ - *b++))
7c0587c8
LW
1880 return tmp;
1881 }
1882 return 0;
1883}
36477c24 1884#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1885
fe14fcc3 1886#ifndef HAS_VPRINTF
d05d9be5
AD
1887/* This vsprintf replacement should generally never get used, since
1888 vsprintf was available in both System V and BSD 2.11. (There may
1889 be some cross-compilation or embedded set-ups where it is needed,
1890 however.)
1891
1892 If you encounter a problem in this function, it's probably a symptom
1893 that Configure failed to detect your system's vprintf() function.
1894 See the section on "item vsprintf" in the INSTALL file.
1895
1896 This version may compile on systems with BSD-ish <stdio.h>,
1897 but probably won't on others.
1898*/
a687059c 1899
85e6fe83 1900#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1901char *
1902#else
1903int
1904#endif
d05d9be5 1905vsprintf(char *dest, const char *pat, void *args)
a687059c
LW
1906{
1907 FILE fakebuf;
1908
d05d9be5
AD
1909#if defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
1910 FILE_ptr(&fakebuf) = (STDCHAR *) dest;
1911 FILE_cnt(&fakebuf) = 32767;
1912#else
1913 /* These probably won't compile -- If you really need
1914 this, you'll have to figure out some other method. */
a687059c
LW
1915 fakebuf._ptr = dest;
1916 fakebuf._cnt = 32767;
d05d9be5 1917#endif
35c8bce7
LW
1918#ifndef _IOSTRG
1919#define _IOSTRG 0
1920#endif
a687059c
LW
1921 fakebuf._flag = _IOWRT|_IOSTRG;
1922 _doprnt(pat, args, &fakebuf); /* what a kludge */
d05d9be5
AD
1923#if defined(STDIO_PTR_LVALUE)
1924 *(FILE_ptr(&fakebuf)++) = '\0';
1925#else
1926 /* PerlIO has probably #defined away fputc, but we want it here. */
1927# ifdef fputc
1928# undef fputc /* XXX Should really restore it later */
1929# endif
1930 (void)fputc('\0', &fakebuf);
1931#endif
85e6fe83 1932#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1933 return(dest);
1934#else
1935 return 0; /* perl doesn't use return value */
1936#endif
1937}
1938
fe14fcc3 1939#endif /* HAS_VPRINTF */
a687059c
LW
1940
1941#ifdef MYSWAP
ffed7fef 1942#if BYTEORDER != 0x4321
a687059c 1943short
864dbfa3 1944Perl_my_swap(pTHX_ short s)
a687059c
LW
1945{
1946#if (BYTEORDER & 1) == 0
1947 short result;
1948
1949 result = ((s & 255) << 8) + ((s >> 8) & 255);
1950 return result;
1951#else
1952 return s;
1953#endif
1954}
1955
1956long
864dbfa3 1957Perl_my_htonl(pTHX_ long l)
a687059c
LW
1958{
1959 union {
1960 long result;
ffed7fef 1961 char c[sizeof(long)];
a687059c
LW
1962 } u;
1963
cef6ea9d
JH
1964#if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
1965#if BYTEORDER == 0x12345678
1966 u.result = 0;
1967#endif
a687059c
LW
1968 u.c[0] = (l >> 24) & 255;
1969 u.c[1] = (l >> 16) & 255;
1970 u.c[2] = (l >> 8) & 255;
1971 u.c[3] = l & 255;
1972 return u.result;
1973#else
ffed7fef 1974#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1975 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1976#else
79072805
LW
1977 register I32 o;
1978 register I32 s;
a687059c 1979
ffed7fef
LW
1980 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1981 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW
1982 }
1983 return u.result;
1984#endif
1985#endif
1986}
1987
1988long
864dbfa3 1989Perl_my_ntohl(pTHX_ long l)
a687059c
LW
1990{
1991 union {
1992 long l;
ffed7fef 1993 char c[sizeof(long)];
a687059c
LW
1994 } u;
1995
ffed7fef 1996#if BYTEORDER == 0x1234
a687059c
LW
1997 u.c[0] = (l >> 24) & 255;
1998 u.c[1] = (l >> 16) & 255;
1999 u.c[2] = (l >> 8) & 255;
2000 u.c[3] = l & 255;
2001 return u.l;
2002#else
ffed7fef 2003#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 2004 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 2005#else
79072805
LW
2006 register I32 o;
2007 register I32 s;
a687059c
LW
2008
2009 u.l = l;
2010 l = 0;
ffed7fef
LW
2011 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
2012 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW
2013 }
2014 return l;
2015#endif
2016#endif
2017}
2018
ffed7fef 2019#endif /* BYTEORDER != 0x4321 */
988174c1
LW
2020#endif /* MYSWAP */
2021
2022/*
2023 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
2024 * If these functions are defined,
2025 * the BYTEORDER is neither 0x1234 nor 0x4321.
2026 * However, this is not assumed.
2027 * -DWS
2028 */
2029
1109a392 2030#define HTOLE(name,type) \
988174c1 2031 type \
ba106d47 2032 name (register type n) \
988174c1
LW
2033 { \
2034 union { \
2035 type value; \
2036 char c[sizeof(type)]; \
2037 } u; \
bb7a0f54
MHM
2038 register U32 i; \
2039 register U32 s = 0; \
1109a392 2040 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW
2041 u.c[i] = (n >> s) & 0xFF; \
2042 } \
2043 return u.value; \
2044 }
2045
1109a392 2046#define LETOH(name,type) \
988174c1 2047 type \
ba106d47 2048 name (register type n) \
988174c1
LW
2049 { \
2050 union { \
2051 type value; \
2052 char c[sizeof(type)]; \
2053 } u; \
bb7a0f54
MHM
2054 register U32 i; \
2055 register U32 s = 0; \
988174c1
LW
2056 u.value = n; \
2057 n = 0; \
1109a392
MHM
2058 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
2059 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW
2060 } \
2061 return n; \
2062 }
2063
1109a392
MHM
2064/*
2065 * Big-endian byte order functions.
2066 */
2067
2068#define HTOBE(name,type) \
2069 type \
2070 name (register type n) \
2071 { \
2072 union { \
2073 type value; \
2074 char c[sizeof(type)]; \
2075 } u; \
bb7a0f54
MHM
2076 register U32 i; \
2077 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM
2078 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2079 u.c[i] = (n >> s) & 0xFF; \
2080 } \
2081 return u.value; \
2082 }
2083
2084#define BETOH(name,type) \
2085 type \
2086 name (register type n) \
2087 { \
2088 union { \
2089 type value; \
2090 char c[sizeof(type)]; \
2091 } u; \
bb7a0f54
MHM
2092 register U32 i; \
2093 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM
2094 u.value = n; \
2095 n = 0; \
2096 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2097 n |= ((type)(u.c[i] & 0xFF)) << s; \
2098 } \
2099 return n; \
2100 }
2101
2102/*
2103 * If we just can't do it...
2104 */
2105
2106#define NOT_AVAIL(name,type) \
2107 type \
2108 name (register type n) \
2109 { \
2110 Perl_croak_nocontext(#name "() not available"); \
2111 return n; /* not reached */ \
2112 }
2113
2114
988174c1 2115#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 2116HTOLE(htovs,short)
988174c1
LW
2117#endif
2118#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 2119HTOLE(htovl,long)
988174c1
LW
2120#endif
2121#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 2122LETOH(vtohs,short)
988174c1
LW
2123#endif
2124#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM
2125LETOH(vtohl,long)
2126#endif
2127
2128#ifdef PERL_NEED_MY_HTOLE16
2129# if U16SIZE == 2
2130HTOLE(Perl_my_htole16,U16)
2131# else
2132NOT_AVAIL(Perl_my_htole16,U16)
2133# endif
2134#endif
2135#ifdef PERL_NEED_MY_LETOH16
2136# if U16SIZE == 2
2137LETOH(Perl_my_letoh16,U16)
2138# else
2139NOT_AVAIL(Perl_my_letoh16,U16)
2140# endif
2141#endif
2142#ifdef PERL_NEED_MY_HTOBE16
2143# if U16SIZE == 2
2144HTOBE(Perl_my_htobe16,U16)
2145# else
2146NOT_AVAIL(Perl_my_htobe16,U16)
2147# endif
2148#endif
2149#ifdef PERL_NEED_MY_BETOH16
2150# if U16SIZE == 2
2151BETOH(Perl_my_betoh16,U16)
2152# else
2153NOT_AVAIL(Perl_my_betoh16,U16)
2154# endif
2155#endif
2156
2157#ifdef PERL_NEED_MY_HTOLE32
2158# if U32SIZE == 4
2159HTOLE(Perl_my_htole32,U32)
2160# else
2161NOT_AVAIL(Perl_my_htole32,U32)
2162# endif
2163#endif
2164#ifdef PERL_NEED_MY_LETOH32
2165# if U32SIZE == 4
2166LETOH(Perl_my_letoh32,U32)
2167# else
2168NOT_AVAIL(Perl_my_letoh32,U32)
2169# endif
2170#endif
2171#ifdef PERL_NEED_MY_HTOBE32
2172# if U32SIZE == 4
2173HTOBE(Perl_my_htobe32,U32)
2174# else
2175NOT_AVAIL(Perl_my_htobe32,U32)
2176# endif
2177#endif
2178#ifdef PERL_NEED_MY_BETOH32
2179# if U32SIZE == 4
2180BETOH(Perl_my_betoh32,U32)
2181# else
2182NOT_AVAIL(Perl_my_betoh32,U32)
2183# endif
2184#endif
2185
2186#ifdef PERL_NEED_MY_HTOLE64
2187# if U64SIZE == 8
2188HTOLE(Perl_my_htole64,U64)
2189# else
2190NOT_AVAIL(Perl_my_htole64,U64)
2191# endif
2192#endif
2193#ifdef PERL_NEED_MY_LETOH64
2194# if U64SIZE == 8
2195LETOH(Perl_my_letoh64,U64)
2196# else
2197NOT_AVAIL(Perl_my_letoh64,U64)
2198# endif
2199#endif
2200#ifdef PERL_NEED_MY_HTOBE64
2201# if U64SIZE == 8
2202HTOBE(Perl_my_htobe64,U64)
2203# else
2204NOT_AVAIL(Perl_my_htobe64,U64)
2205# endif
2206#endif
2207#ifdef PERL_NEED_MY_BETOH64
2208# if U64SIZE == 8
2209BETOH(Perl_my_betoh64,U64)
2210# else
2211NOT_AVAIL(Perl_my_betoh64,U64)
2212# endif
988174c1 2213#endif
a687059c 2214
1109a392
MHM
2215#ifdef PERL_NEED_MY_HTOLES
2216HTOLE(Perl_my_htoles,short)
2217#endif
2218#ifdef PERL_NEED_MY_LETOHS
2219LETOH(Perl_my_letohs,short)
2220#endif
2221#ifdef PERL_NEED_MY_HTOBES
2222HTOBE(Perl_my_htobes,short)
2223#endif
2224#ifdef PERL_NEED_MY_BETOHS
2225BETOH(Perl_my_betohs,short)
2226#endif
2227
2228#ifdef PERL_NEED_MY_HTOLEI
2229HTOLE(Perl_my_htolei,int)
2230#endif
2231#ifdef PERL_NEED_MY_LETOHI
2232LETOH(Perl_my_letohi,int)
2233#endif
2234#ifdef PERL_NEED_MY_HTOBEI
2235HTOBE(Perl_my_htobei,int)
2236#endif
2237#ifdef PERL_NEED_MY_BETOHI
2238BETOH(Perl_my_betohi,int)
2239#endif
2240
2241#ifdef PERL_NEED_MY_HTOLEL
2242HTOLE(Perl_my_htolel,long)
2243#endif
2244#ifdef PERL_NEED_MY_LETOHL
2245LETOH(Perl_my_letohl,long)
2246#endif
2247#ifdef PERL_NEED_MY_HTOBEL
2248HTOBE(Perl_my_htobel,long)
2249#endif
2250#ifdef PERL_NEED_MY_BETOHL
2251BETOH(Perl_my_betohl,long)
2252#endif
2253
2254void
2255Perl_my_swabn(void *ptr, int n)
2256{
2257 register char *s = (char *)ptr;
2258 register char *e = s + (n-1);
2259 register char tc;
2260
7918f24d
NC
2261 PERL_ARGS_ASSERT_MY_SWABN;
2262
1109a392
MHM
2263 for (n /= 2; n > 0; s++, e--, n--) {
2264 tc = *s;
2265 *s = *e;
2266 *e = tc;
2267 }
2268}
2269
4a7d1889 2270PerlIO *
c9289b7b 2271Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args)
4a7d1889 2272{
9c12f1e5 2273#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__)
97aff369 2274 dVAR;
1f852d0d
NIS
2275 int p[2];
2276 register I32 This, that;
2277 register Pid_t pid;
2278 SV *sv;
2279 I32 did_pipes = 0;
2280 int pp[2];
2281
7918f24d
NC
2282 PERL_ARGS_ASSERT_MY_POPEN_LIST;
2283
1f852d0d
NIS
2284 PERL_FLUSHALL_FOR_CHILD;
2285 This = (*mode == 'w');
2286 that = !This;
2287 if (PL_tainting) {
2288 taint_env();
2289 taint_proper("Insecure %s%s", "EXEC");
2290 }
2291 if (PerlProc_pipe(p) < 0)
4608196e 2292 return NULL;
1f852d0d
NIS
2293 /* Try for another pipe pair for error return */
2294 if (PerlProc_pipe(pp) >= 0)
2295 did_pipes = 1;
52e18b1f 2296 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS
2297 if (errno != EAGAIN) {
2298 PerlLIO_close(p[This]);
4e6dfe71 2299 PerlLIO_close(p[that]);
1f852d0d
NIS
2300 if (did_pipes) {
2301 PerlLIO_close(pp[0]);
2302 PerlLIO_close(pp[1]);
2303 }
4608196e 2304 return NULL;
1f852d0d
NIS
2305 }
2306 sleep(5);
2307 }
2308 if (pid == 0) {
2309 /* Child */
1f852d0d
NIS
2310#undef THIS
2311#undef THAT
2312#define THIS that
2313#define THAT This
1f852d0d
NIS
2314 /* Close parent's end of error status pipe (if any) */
2315 if (did_pipes) {
2316 PerlLIO_close(pp[0]);
2317#if defined(HAS_FCNTL) && defined(F_SETFD)
2318 /* Close error pipe automatically if exec works */
2319 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2320#endif
2321 }
2322 /* Now dup our end of _the_ pipe to right position */
2323 if (p[THIS] != (*mode == 'r')) {
2324 PerlLIO_dup2(p[THIS], *mode == 'r');
2325 PerlLIO_close(p[THIS]);
4e6dfe71
GS
2326 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2327 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2328 }
4e6dfe71
GS
2329 else
2330 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS
2331#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2332 /* No automatic close - do it by hand */
b7953727
JH
2333# ifndef NOFILE
2334# define NOFILE 20
2335# endif
a080fe3d
NIS
2336 {
2337 int fd;
2338
2339 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2340 if (fd != pp[1])
a080fe3d
NIS
2341 PerlLIO_close(fd);
2342 }
1f852d0d
NIS
2343 }
2344#endif
a0714e2c 2345 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
1f852d0d
NIS
2346 PerlProc__exit(1);
2347#undef THIS
2348#undef THAT
2349 }
2350 /* Parent */
52e18b1f 2351 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS
2352 if (did_pipes)
2353 PerlLIO_close(pp[1]);
2354 /* Keep the lower of the two fd numbers */
2355 if (p[that] < p[This]) {
2356 PerlLIO_dup2(p[This], p[that]);
2357 PerlLIO_close(p[This]);
2358 p[This] = p[that];
2359 }
4e6dfe71
GS
2360 else
2361 PerlLIO_close(p[that]); /* close child's end of pipe */
2362
1f852d0d
NIS
2363 LOCK_FDPID_MUTEX;
2364 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2365 UNLOCK_FDPID_MUTEX;
862a34c6 2366 SvUPGRADE(sv,SVt_IV);
45977657 2367 SvIV_set(sv, pid);
1f852d0d
NIS
2368 PL_forkprocess = pid;
2369 /* If we managed to get status pipe check for exec fail */
2370 if (did_pipes && pid > 0) {
2371 int errkid;
bb7a0f54
MHM
2372 unsigned n = 0;
2373 SSize_t n1;
1f852d0d
NIS
2374
2375 while (n < sizeof(int)) {
2376 n1 = PerlLIO_read(pp[0],
2377 (void*)(((char*)&errkid)+n),
2378 (sizeof(int)) - n);
2379 if (n1 <= 0)
2380 break;
2381 n += n1;
2382 }
2383 PerlLIO_close(pp[0]);
2384 did_pipes = 0;
2385 if (n) { /* Error */
2386 int pid2, status;
8c51524e 2387 PerlLIO_close(p[This]);
1f852d0d
NIS
2388 if (n != sizeof(int))
2389 Perl_croak(aTHX_ "panic: kid popen errno read");
2390 do {
2391 pid2 = wait4pid(pid, &status, 0);
2392 } while (pid2 == -1 && errno == EINTR);
2393 errno = errkid; /* Propagate errno from kid */
4608196e 2394 return NULL;
1f852d0d
NIS
2395 }
2396 }
2397 if (did_pipes)
2398 PerlLIO_close(pp[0]);
2399 return PerlIO_fdopen(p[This], mode);
2400#else
9d419b5f 2401# ifdef OS2 /* Same, without fork()ing and all extra overhead... */
4e205ed6 2402 return my_syspopen4(aTHX_ NULL, mode, n, args);
9d419b5f 2403# else
4a7d1889
NIS
2404 Perl_croak(aTHX_ "List form of piped open not implemented");
2405 return (PerlIO *) NULL;
9d419b5f 2406# endif
1f852d0d 2407#endif
4a7d1889
NIS
2408}
2409
5f05dabc 2410 /* VMS' my_popen() is in VMS.c, same with OS/2. */
9c12f1e5 2411#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
760ac839 2412PerlIO *
3dd43144 2413Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c 2414{
97aff369 2415 dVAR;
a687059c 2416 int p[2];
8ac85365 2417 register I32 This, that;
d8a83dd3 2418 register Pid_t pid;
79072805 2419 SV *sv;
bfce84ec 2420 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ
2421 I32 did_pipes = 0;
2422 int pp[2];
a687059c 2423
7918f24d
NC
2424 PERL_ARGS_ASSERT_MY_POPEN;
2425
45bc9206 2426 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ
2427#ifdef OS2
2428 if (doexec) {
23da6c43 2429 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2430 }
a1d180c4 2431#endif
8ac85365
NIS
2432 This = (*mode == 'w');
2433 that = !This;
3280af22 2434 if (doexec && PL_tainting) {
bbce6d69
PP
2435 taint_env();
2436 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2437 }
c2267164 2438 if (PerlProc_pipe(p) < 0)
4608196e 2439 return NULL;
e446cec8
IZ
2440 if (doexec && PerlProc_pipe(pp) >= 0)
2441 did_pipes = 1;
52e18b1f 2442 while ((pid = PerlProc_fork()) < 0) {
a687059c 2443 if (errno != EAGAIN) {
6ad3d225 2444 PerlLIO_close(p[This]);
b5ac89c3 2445 PerlLIO_close(p[that]);
e446cec8
IZ
2446 if (did_pipes) {
2447 PerlLIO_close(pp[0]);
2448 PerlLIO_close(pp[1]);
2449 }
a687059c 2450 if (!doexec)
cea2e8a9 2451 Perl_croak(aTHX_ "Can't fork");
4608196e 2452 return NULL;
a687059c
LW
2453 }
2454 sleep(5);
2455 }
2456 if (pid == 0) {
79072805
LW
2457 GV* tmpgv;
2458
30ac6d9b
GS
2459#undef THIS
2460#undef THAT
a687059c 2461#define THIS that
8ac85365 2462#define THAT This
e446cec8
IZ
2463 if (did_pipes) {
2464 PerlLIO_close(pp[0]);
2465#if defined(HAS_FCNTL) && defined(F_SETFD)
2466 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2467#endif
2468 }
a687059c 2469 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS
2470 PerlLIO_dup2(p[THIS], *mode == 'r');
2471 PerlLIO_close(p[THIS]);
b5ac89c3
NIS
2472 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2473 PerlLIO_close(p[THAT]);
a687059c 2474 }
b5ac89c3
NIS
2475 else
2476 PerlLIO_close(p[THAT]);
4435c477 2477#ifndef OS2
a687059c 2478 if (doexec) {
a0d0e21e 2479#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW
2480#ifndef NOFILE
2481#define NOFILE 20
2482#endif
a080fe3d 2483 {
3aed30dc 2484 int fd;
a080fe3d
NIS
2485
2486 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2487 if (fd != pp[1])
3aed30dc 2488 PerlLIO_close(fd);
a080fe3d 2489 }
ae986130 2490#endif
a080fe3d
NIS
2491 /* may or may not use the shell */
2492 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2493 PerlProc__exit(1);
a687059c 2494 }
4435c477 2495#endif /* defined OS2 */
713cef20
IZ
2496
2497#ifdef PERLIO_USING_CRLF
2498 /* Since we circumvent IO layers when we manipulate low-level
2499 filedescriptors directly, need to manually switch to the
2500 default, binary, low-level mode; see PerlIOBuf_open(). */
2501 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2502#endif
2503
fafc274c 2504 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4d76a344 2505 SvREADONLY_off(GvSV(tmpgv));
7766f137 2506 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS
2507 SvREADONLY_on(GvSV(tmpgv));
2508 }
2509#ifdef THREADS_HAVE_PIDS
2510 PL_ppid = (IV)getppid();
2511#endif
3280af22 2512 PL_forkprocess = 0;
ca0c25f6 2513#ifdef PERL_USES_PL_PIDSTATUS
3280af22 2514 hv_clear(PL_pidstatus); /* we have no children */
ca0c25f6 2515#endif
4608196e 2516 return NULL;
a687059c
LW
2517#undef THIS
2518#undef THAT
2519 }
b5ac89c3 2520 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ
2521 if (did_pipes)
2522 PerlLIO_close(pp[1]);
8ac85365 2523 if (p[that] < p[This]) {
6ad3d225
GS
2524 PerlLIO_dup2(p[This], p[that]);
2525 PerlLIO_close(p[This]);
8ac85365 2526 p[This] = p[that];
62b28dd9 2527 }
b5ac89c3
NIS
2528 else
2529 PerlLIO_close(p[that]);
2530
4755096e 2531 LOCK_FDPID_MUTEX;
3280af22 2532 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2533 UNLOCK_FDPID_MUTEX;
862a34c6 2534 SvUPGRADE(sv,SVt_IV);
45977657 2535 SvIV_set(sv, pid);
3280af22 2536 PL_forkprocess = pid;
e446cec8
IZ
2537 if (did_pipes && pid > 0) {
2538 int errkid;
bb7a0f54
MHM
2539 unsigned n = 0;
2540 SSize_t n1;
e446cec8
IZ
2541
2542 while (n < sizeof(int)) {
2543 n1 = PerlLIO_read(pp[0],
2544 (void*)(((char*)&errkid)+n),
2545 (sizeof(int)) - n);
2546 if (n1 <= 0)
2547 break;
2548 n += n1;
2549 }
2f96c702
IZ
2550 PerlLIO_close(pp[0]);
2551 did_pipes = 0;
e446cec8 2552 if (n) { /* Error */
faa466a7 2553 int pid2, status;
8c51524e 2554 PerlLIO_close(p[This]);
e446cec8 2555 if (n != sizeof(int))
cea2e8a9 2556 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG
2557 do {
2558 pid2 = wait4pid(pid, &status, 0);
2559 } while (pid2 == -1 && errno == EINTR);
e446cec8 2560 errno = errkid; /* Propagate errno from kid */
4608196e 2561 return NULL;
e446cec8
IZ
2562 }
2563 }
2564 if (did_pipes)
2565 PerlLIO_close(pp[0]);
8ac85365 2566 return PerlIO_fdopen(p[This], mode);
a687059c 2567}
7c0587c8 2568#else
85ca448a 2569#if defined(atarist) || defined(EPOC)
7c0587c8 2570FILE *popen();
760ac839 2571PerlIO *
cef6ea9d 2572Perl_my_popen(pTHX_ const char *cmd, const char *mode)
7c0587c8 2573{
7918f24d 2574 PERL_ARGS_ASSERT_MY_POPEN;
45bc9206 2575 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS
2576 /* Call system's popen() to get a FILE *, then import it.
2577 used 0 for 2nd parameter to PerlIO_importFILE;
2578 apparently not used
2579 */
2580 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2581}
2b96b0a5
JH
2582#else
2583#if defined(DJGPP)
2584FILE *djgpp_popen();
2585PerlIO *
cef6ea9d 2586Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2b96b0a5
JH
2587{
2588 PERL_FLUSHALL_FOR_CHILD;
2589 /* Call system's popen() to get a FILE *, then import it.
2590 used 0 for 2nd parameter to PerlIO_importFILE;
2591 apparently not used
2592 */
2593 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2594}
9c12f1e5
RGS
2595#else
2596#if defined(__LIBCATAMOUNT__)
2597PerlIO *
2598Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2599{
2600 return NULL;
2601}
2602#endif
2b96b0a5 2603#endif
7c0587c8
LW
2604#endif
2605
2606#endif /* !DOSISH */
a687059c 2607
52e18b1f
GS
2608/* this is called in parent before the fork() */
2609void
2610Perl_atfork_lock(void)
2611{
27da23d5 2612 dVAR;
3db8f154 2613#if defined(USE_ITHREADS)
52e18b1f
GS
2614 /* locks must be held in locking order (if any) */
2615# ifdef MYMALLOC
2616 MUTEX_LOCK(&PL_malloc_mutex);
2617# endif
2618 OP_REFCNT_LOCK;
2619#endif
2620}
2621
2622/* this is called in both parent and child after the fork() */
2623void
2624Perl_atfork_unlock(void)
2625{
27da23d5 2626 dVAR;
3db8f154 2627#if defined(USE_ITHREADS)
52e18b1f
GS
2628 /* locks must be released in same order as in atfork_lock() */
2629# ifdef MYMALLOC
2630 MUTEX_UNLOCK(&PL_malloc_mutex);
2631# endif
2632 OP_REFCNT_UNLOCK;
2633#endif
2634}
2635
2636Pid_t
2637Perl_my_fork(void)
2638{
2639#if defined(HAS_FORK)
2640 Pid_t pid;
3db8f154 2641#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS
2642 atfork_lock();
2643 pid = fork();
2644 atfork_unlock();
2645#else
2646 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2647 * handlers elsewhere in the code */
2648 pid = fork();
2649#endif
2650 return pid;
2651#else
2652 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2653 Perl_croak_nocontext("fork() not available");
b961a566 2654 return 0;
52e18b1f
GS
2655#endif /* HAS_FORK */
2656}
2657
748a9306 2658#ifdef DUMP_FDS
35ff7856 2659void
c9289b7b 2660Perl_dump_fds(pTHX_ const char *const s)
ae986130
LW
2661{
2662 int fd;
c623ac67 2663 Stat_t tmpstatbuf;
ae986130 2664
7918f24d
NC
2665 PERL_ARGS_ASSERT_DUMP_FDS;
2666
bf49b057 2667 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2668 for (fd = 0; fd < 32; fd++) {
6ad3d225 2669 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2670 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2671 }
bf49b057 2672 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2673 return;
ae986130 2674}
35ff7856 2675#endif /* DUMP_FDS */
ae986130 2676
fe14fcc3 2677#ifndef HAS_DUP2
fec02dd3 2678int
ba106d47 2679dup2(int oldfd, int newfd)
a687059c 2680{
a0d0e21e 2681#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD
2682 if (oldfd == newfd)
2683 return oldfd;
6ad3d225 2684 PerlLIO_close(newfd);
fec02dd3 2685 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2686#else
fc36a67e
PP
2687#define DUP2_MAX_FDS 256
2688 int fdtmp[DUP2_MAX_FDS];
79072805 2689 I32 fdx = 0;
ae986130
LW
2690 int fd;
2691
fe14fcc3 2692 if (oldfd == newfd)
fec02dd3 2693 return oldfd;
6ad3d225 2694 PerlLIO_close(newfd);
fc36a67e 2695 /* good enough for low fd's... */
6ad3d225 2696 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2697 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2698 PerlLIO_close(fd);
fc36a67e
PP
2699 fd = -1;
2700 break;
2701 }
ae986130 2702 fdtmp[fdx++] = fd;
fc36a67e 2703 }
ae986130 2704 while (fdx > 0)
6ad3d225 2705 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2706 return fd;
62b28dd9 2707#endif
a687059c
LW
2708}
2709#endif
2710
64ca3a65 2711#ifndef PERL_MICRO
ff68c719
PP
2712#ifdef HAS_SIGACTION
2713
abea2c45
HS
2714#ifdef MACOS_TRADITIONAL
2715/* We don't want restart behavior on MacOS */
2716#undef SA_RESTART
2717#endif
2718
ff68c719 2719Sighandler_t
864dbfa3 2720Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2721{
27da23d5 2722 dVAR;
ff68c719
PP
2723 struct sigaction act, oact;
2724
a10b1e10
JH
2725#ifdef USE_ITHREADS
2726 /* only "parent" interpreter can diddle signals */
2727 if (PL_curinterp != aTHX)
8aad04aa 2728 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2729#endif
2730
8aad04aa 2731 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2732 sigemptyset(&act.sa_mask);
2733 act.sa_flags = 0;
2734#ifdef SA_RESTART
4ffa73a3
JH
2735 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2736 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2737#endif
358837b8 2738#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2739 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2740 act.sa_flags |= SA_NOCLDWAIT;
2741#endif
ff68c719 2742 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2743 return (Sighandler_t) SIG_ERR;
ff68c719 2744 else
8aad04aa 2745 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2746}
2747
2748Sighandler_t
864dbfa3 2749Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP
2750{
2751 struct sigaction oact;
96a5add6 2752 PERL_UNUSED_CONTEXT;
ff68c719
PP
2753
2754 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2755 return (Sighandler_t) SIG_ERR;
ff68c719 2756 else
8aad04aa 2757 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2758}
2759
2760int
864dbfa3 2761Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2762{
27da23d5 2763 dVAR;
ff68c719
PP
2764 struct sigaction act;
2765
7918f24d
NC
2766 PERL_ARGS_ASSERT_RSIGNAL_SAVE;
2767
a10b1e10
JH
2768#ifdef USE_ITHREADS
2769 /* only "parent" interpreter can diddle signals */
2770 if (PL_curinterp != aTHX)
2771 return -1;
2772#endif
2773
8aad04aa 2774 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2775 sigemptyset(&act.sa_mask);
2776 act.sa_flags = 0;
2777#ifdef SA_RESTART
4ffa73a3
JH
2778 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2779 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2780#endif
36b5d377 2781#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2782 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2783 act.sa_flags |= SA_NOCLDWAIT;
2784#endif
ff68c719
PP
2785 return sigaction(signo, &act, save);
2786}
2787
2788int
864dbfa3 2789Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2790{
27da23d5 2791 dVAR;
a10b1e10
JH
2792#ifdef USE_ITHREADS
2793 /* only "parent" interpreter can diddle signals */
2794 if (PL_curinterp != aTHX)
2795 return -1;
2796#endif
2797
ff68c719
PP
2798 return sigaction(signo, save, (struct sigaction *)NULL);
2799}
2800
2801#else /* !HAS_SIGACTION */
2802
2803Sighandler_t
864dbfa3 2804Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2805{
39f1703b 2806#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2807 /* only "parent" interpreter can diddle signals */
2808 if (PL_curinterp != aTHX)
8aad04aa 2809 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2810#endif
2811
6ad3d225 2812 return PerlProc_signal(signo, handler);
ff68c719
PP
2813}
2814
fabdb6c0 2815static Signal_t
4e35701f 2816sig_trap(int signo)
ff68c719 2817{
27da23d5
JH
2818 dVAR;
2819 PL_sig_trapped++;
ff68c719
PP
2820}
2821
2822Sighandler_t
864dbfa3 2823Perl_rsignal_state(pTHX_ int signo)
ff68c719 2824{
27da23d5 2825 dVAR;
ff68c719
PP
2826 Sighandler_t oldsig;
2827
39f1703b 2828#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2829 /* only "parent" interpreter can diddle signals */
2830 if (PL_curinterp != aTHX)
8aad04aa 2831 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2832#endif
2833
27da23d5 2834 PL_sig_trapped = 0;
6ad3d225
GS
2835 oldsig = PerlProc_signal(signo, sig_trap);
2836 PerlProc_signal(signo, oldsig);
27da23d5 2837 if (PL_sig_trapped)
3aed30dc 2838 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719
PP
2839 return oldsig;
2840}
2841
2842int
864dbfa3 2843Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2844{
39f1703b 2845#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2846 /* only "parent" interpreter can diddle signals */
2847 if (PL_curinterp != aTHX)
2848 return -1;
2849#endif
6ad3d225 2850 *save = PerlProc_signal(signo, handler);
8aad04aa 2851 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2852}
2853
2854int
864dbfa3 2855Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2856{
39f1703b 2857#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2858 /* only "parent" interpreter can diddle signals */
2859 if (PL_curinterp != aTHX)
2860 return -1;
2861#endif
8aad04aa 2862 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2863}
2864
2865#endif /* !HAS_SIGACTION */
64ca3a65 2866#endif /* !PERL_MICRO */
ff68c719 2867
5f05dabc 2868 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
9c12f1e5 2869#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
79072805 2870I32
864dbfa3 2871Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2872{
97aff369 2873 dVAR;
ff68c719 2874 Sigsave_t hstat, istat, qstat;
a687059c 2875 int status;
a0d0e21e 2876 SV **svp;
d8a83dd3
JH
2877 Pid_t pid;
2878 Pid_t pid2;
03136e13 2879 bool close_failed;
b7953727 2880 int saved_errno = 0;
22fae026
TM
2881#ifdef WIN32
2882 int saved_win32_errno;
2883#endif
a687059c 2884
4755096e 2885 LOCK_FDPID_MUTEX;
3280af22 2886 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2887 UNLOCK_FDPID_MUTEX;
25d92023 2888 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2889 SvREFCNT_dec(*svp);
3280af22 2890 *svp = &PL_sv_undef;
ddcf38b7
IZ
2891#ifdef OS2
2892 if (pid == -1) { /* Opened by popen. */
2893 return my_syspclose(ptr);
2894 }
a1d180c4 2895#endif
03136e13
CS
2896 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2897 saved_errno = errno;
22fae026
TM
2898#ifdef WIN32
2899 saved_win32_errno = GetLastError();
2900#endif
03136e13 2901 }
7c0587c8 2902#ifdef UTS
6ad3d225 2903 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2904#endif
64ca3a65 2905#ifndef PERL_MICRO
8aad04aa
JH
2906 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2907 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2908 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
64ca3a65 2909#endif
748a9306 2910 do {
1d3434b8
GS
2911 pid2 = wait4pid(pid, &status, 0);
2912 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2913#ifndef PERL_MICRO
ff68c719
PP
2914 rsignal_restore(SIGHUP, &hstat);
2915 rsignal_restore(SIGINT, &istat);
2916 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2917#endif
03136e13 2918 if (close_failed) {
ce6e1103 2919 SETERRNO(saved_errno, 0);
03136e13
CS
2920 return -1;
2921 }
1d3434b8 2922 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2923}
9c12f1e5
RGS
2924#else
2925#if defined(__LIBCATAMOUNT__)
2926I32
2927Perl_my_pclose(pTHX_ PerlIO *ptr)
2928{
2929 return -1;
2930}
2931#endif
4633a7c4
LW
2932#endif /* !DOSISH */
2933
9c12f1e5 2934#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
79072805 2935I32
d8a83dd3 2936Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2937{
97aff369 2938 dVAR;
27da23d5 2939 I32 result = 0;
7918f24d 2940 PERL_ARGS_ASSERT_WAIT4PID;
b7953727
JH
2941 if (!pid)
2942 return -1;
ca0c25f6 2943#ifdef PERL_USES_PL_PIDSTATUS
b7953727 2944 {
3aed30dc 2945 if (pid > 0) {
12072db5
NC
2946 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2947 pid, rather than a string form. */
c4420975 2948 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
3aed30dc
HS
2949 if (svp && *svp != &PL_sv_undef) {
2950 *statusp = SvIVX(*svp);
12072db5
NC
2951 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2952 G_DISCARD);
3aed30dc
HS
2953 return pid;
2954 }
2955 }
2956 else {
2957 HE *entry;
2958
2959 hv_iterinit(PL_pidstatus);
2960 if ((entry = hv_iternext(PL_pidstatus))) {
c4420975 2961 SV * const sv = hv_iterval(PL_pidstatus,entry);
7ea75b61 2962 I32 len;
0bcc34c2 2963 const char * const spid = hv_iterkey(entry,&len);
27da23d5 2964
12072db5
NC
2965 assert (len == sizeof(Pid_t));
2966 memcpy((char *)&pid, spid, len);
3aed30dc 2967 *statusp = SvIVX(sv);
7b9a3241
NC
2968 /* The hash iterator is currently on this entry, so simply
2969 calling hv_delete would trigger the lazy delete, which on
2970 aggregate does more work, beacuse next call to hv_iterinit()
2971 would spot the flag, and have to call the delete routine,
2972 while in the meantime any new entries can't re-use that
2973 memory. */
2974 hv_iterinit(PL_pidstatus);
7ea75b61 2975 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
3aed30dc
HS
2976 return pid;
2977 }
20188a90
LW
2978 }
2979 }
68a29c53 2980#endif
79072805 2981#ifdef HAS_WAITPID
367f3c24
IZ
2982# ifdef HAS_WAITPID_RUNTIME
2983 if (!HAS_WAITPID_RUNTIME)
2984 goto hard_way;
2985# endif
cddd4526 2986 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2987 goto finish;
367f3c24
IZ
2988#endif
2989#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
4608196e 2990 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
dfcfdb64 2991 goto finish;
367f3c24 2992#endif
ca0c25f6 2993#ifdef PERL_USES_PL_PIDSTATUS
27da23d5 2994#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2995 hard_way:
27da23d5 2996#endif
a0d0e21e 2997 {
a0d0e21e 2998 if (flags)
cea2e8a9 2999 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 3000 else {
76e3520e 3001 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW
3002 pidgone(result,*statusp);
3003 if (result < 0)
3004 *statusp = -1;
3005 }
a687059c
LW
3006 }
3007#endif
27da23d5 3008#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 3009 finish:
27da23d5 3010#endif
cddd4526
NIS
3011 if (result < 0 && errno == EINTR) {
3012 PERL_ASYNC_CHECK();
48dbb59e 3013 errno = EINTR; /* reset in case a signal handler changed $! */
cddd4526
NIS
3014 }
3015 return result;
a687059c 3016}
2986a63f 3017#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 3018
ca0c25f6 3019#ifdef PERL_USES_PL_PIDSTATUS
7c0587c8 3020void
d8a83dd3 3021Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 3022{
79072805 3023 register SV *sv;
a687059c 3024
12072db5 3025 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
862a34c6 3026 SvUPGRADE(sv,SVt_IV);
45977657 3027 SvIV_set(sv, status);
20188a90 3028 return;
a687059c 3029}
ca0c25f6 3030#endif
a687059c 3031
85ca448a 3032#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 3033int pclose();
ddcf38b7
IZ
3034#ifdef HAS_FORK
3035int /* Cannot prototype with I32
3036 in os2ish.h. */
ba106d47 3037my_syspclose(PerlIO *ptr)
ddcf38b7 3038#else
79072805 3039I32
864dbfa3 3040Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 3041#endif
a687059c 3042{
760ac839 3043 /* Needs work for PerlIO ! */
c4420975 3044 FILE * const f = PerlIO_findFILE(ptr);
7452cf6a 3045 const I32 result = pclose(f);
2b96b0a5
JH
3046 PerlIO_releaseFILE(ptr,f);
3047 return result;
3048}
3049#endif
3050
933fea7f 3051#if defined(DJGPP)
2b96b0a5
JH
3052int djgpp_pclose();
3053I32
3054Perl_my_pclose(pTHX_ PerlIO *ptr)
3055{
3056 /* Needs work for PerlIO ! */
c4420975 3057 FILE * const f = PerlIO_findFILE(ptr);
2b96b0a5 3058 I32 result = djgpp_pclose(f);
933fea7f 3059 result = (result << 8) & 0xff00;
760ac839
LW
3060 PerlIO_releaseFILE(ptr,f);
3061 return result;
a687059c 3062}
7c0587c8 3063#endif
9f68db38
LW
3064
3065void
864dbfa3 3066Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 3067{
79072805 3068 register I32 todo;
c4420975 3069 register const char * const frombase = from;
96a5add6 3070 PERL_UNUSED_CONTEXT;
9f68db38 3071
7918f24d
NC
3072 PERL_ARGS_ASSERT_REPEATCPY;
3073
9f68db38 3074 if (len == 1) {
08105a92 3075 register const char c = *from;
9f68db38 3076 while (count-- > 0)
5926133d 3077 *to++ = c;
9f68db38
LW
3078 return;
3079 }
3080 while (count-- > 0) {
3081 for (todo = len; todo > 0; todo--) {
3082 *to++ = *from++;
3083 }
3084 from = frombase;
3085 }
3086}
0f85fab0 3087
fe14fcc3 3088#ifndef HAS_RENAME
79072805 3089I32
4373e329 3090Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 3091{
93a17b20
LW
3092 char *fa = strrchr(a,'/');
3093 char *fb = strrchr(b,'/');
c623ac67
GS
3094 Stat_t tmpstatbuf1;
3095 Stat_t tmpstatbuf2;
c4420975 3096 SV * const tmpsv = sv_newmortal();
62b28dd9 3097
7918f24d
NC
3098 PERL_ARGS_ASSERT_SAME_DIRENT;
3099
62b28dd9
LW
3100 if (fa)
3101 fa++;
3102 else
3103 fa = a;
3104 if (fb)
3105 fb++;
3106 else
3107 fb = b;
3108 if (strNE(a,b))
3109 return FALSE;
3110 if (fa == a)
76f68e9b 3111 sv_setpvs(tmpsv, ".");
62b28dd9 3112 else
46fc3d4c 3113 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 3114 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW
3115 return FALSE;
3116 if (fb == b)
76f68e9b 3117 sv_setpvs(tmpsv, ".");
62b28dd9 3118 else
46fc3d4c 3119 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 3120 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW
3121 return FALSE;
3122 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3123 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3124}
fe14fcc3
LW
3125#endif /* !HAS_RENAME */
3126
491527d0 3127char*
7f315aed
NC
3128Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3129 const char *const *const search_ext, I32 flags)
491527d0 3130{
97aff369 3131 dVAR;
bd61b366
SS
3132 const char *xfound = NULL;
3133 char *xfailed = NULL;
0f31cffe 3134 char tmpbuf[MAXPATHLEN];
491527d0 3135 register char *s;
5f74f29c 3136 I32 len = 0;
491527d0 3137 int retval;
39a02377 3138 char *bufend;
491527d0
GS
3139#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
3140# define SEARCH_EXTS ".bat", ".cmd", NULL
3141# define MAX_EXT_LEN 4
3142#endif
3143#ifdef OS2
3144# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3145# define MAX_EXT_LEN 4
3146#endif
3147#ifdef VMS
3148# define SEARCH_EXTS ".pl", ".com", NULL
3149# define MAX_EXT_LEN 4
3150#endif
3151 /* additional extensions to try in each dir if scriptname not found */
3152#ifdef SEARCH_EXTS
0bcc34c2 3153 static const char *const exts[] = { SEARCH_EXTS };
7f315aed 3154 const char *const *const ext = search_ext ? search_ext : exts;
491527d0 3155 int extidx = 0, i = 0;
bd61b366 3156 const char *curext = NULL;
491527d0 3157#else
53c1dcc0 3158 PERL_UNUSED_ARG(search_ext);
491527d0
GS
3159# define MAX_EXT_LEN 0
3160#endif
3161
7918f24d
NC
3162 PERL_ARGS_ASSERT_FIND_SCRIPT;
3163
491527d0
GS
3164 /*
3165 * If dosearch is true and if scriptname does not contain path
3166 * delimiters, search the PATH for scriptname.
3167 *
3168 * If SEARCH_EXTS is also defined, will look for each
3169 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3170 * while searching the PATH.
3171 *
3172 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3173 * proceeds as follows:
3174 * If DOSISH or VMSISH:
3175 * + look for ./scriptname{,.foo,.bar}
3176 * + search the PATH for scriptname{,.foo,.bar}
3177 *
3178 * If !DOSISH:
3179 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3180 * this will not look in '.' if it's not in the PATH)
3181 */
84486fc6 3182 tmpbuf[0] = '\0';
491527d0
GS
3183
3184#ifdef VMS
3185# ifdef ALWAYS_DEFTYPES
3186 len = strlen(scriptname);
3187 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
c4420975 3188 int idx = 0, deftypes = 1;
491527d0
GS
3189 bool seen_dot = 1;
3190
bd61b366 3191 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
491527d0
GS
3192# else
3193 if (dosearch) {
c4420975 3194 int idx = 0, deftypes = 1;
491527d0
GS
3195 bool seen_dot = 1;
3196
bd61b366 3197 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
491527d0
GS
3198# endif
3199 /* The first time through, just add SEARCH_EXTS to whatever we
3200 * already have, so we can check for default file types. */
3201 while (deftypes ||
84486fc6 3202 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS
3203 {
3204 if (deftypes) {
3205 deftypes = 0;
84486fc6 3206 *tmpbuf = '\0';
491527d0 3207 }
84486fc6
GS
3208 if ((strlen(tmpbuf) + strlen(scriptname)
3209 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 3210 continue; /* don't search dir with too-long name */
6fca0082 3211 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
491527d0
GS
3212#else /* !VMS */
3213
3214#ifdef DOSISH
3215 if (strEQ(scriptname, "-"))
3216 dosearch = 0;
3217 if (dosearch) { /* Look in '.' first. */
fe2774ed 3218 const char *cur = scriptname;
491527d0
GS
3219#ifdef SEARCH_EXTS
3220 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3221 while (ext[i])
3222 if (strEQ(ext[i++],curext)) {
3223 extidx = -1; /* already has an ext */
3224 break;
3225 }
3226 do {
3227#endif
3228 DEBUG_p(PerlIO_printf(Perl_debug_log,
3229 "Looking for %s\n",cur));
017f25f1
IZ
3230 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3231 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS
3232 dosearch = 0;
3233 scriptname = cur;
3234#ifdef SEARCH_EXTS
3235 break;
3236#endif
3237 }
3238#ifdef SEARCH_EXTS
3239 if (cur == scriptname) {
3240 len = strlen(scriptname);
84486fc6 3241 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 3242 break;
9e4425f7
SH
3243 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3244 cur = tmpbuf;
491527d0
GS
3245 }
3246 } while (extidx >= 0 && ext[extidx] /* try an extension? */
6fca0082 3247 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
491527d0
GS
3248#endif
3249 }
3250#endif
3251
cd39f2b6
JH
3252#ifdef MACOS_TRADITIONAL
3253 if (dosearch && !strchr(scriptname, ':') &&
3254 (s = PerlEnv_getenv("Commands")))
3255#else
491527d0
GS
3256 if (dosearch && !strchr(scriptname, '/')
3257#ifdef DOSISH
3258 && !strchr(scriptname, '\\')
3259#endif
cd39f2b6
JH
3260 && (s = PerlEnv_getenv("PATH")))
3261#endif
3262 {
491527d0 3263 bool seen_dot = 0;
92f0c265 3264
39a02377
DM
3265 bufend = s + strlen(s);
3266 while (s < bufend) {
cd39f2b6 3267#ifdef MACOS_TRADITIONAL
39a02377 3268 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
cd39f2b6
JH
3269 ',',
3270 &len);
3271#else
491527d0
GS
3272#if defined(atarist) || defined(DOSISH)
3273 for (len = 0; *s
3274# ifdef atarist
3275 && *s != ','
3276# endif
3277 && *s != ';'; len++, s++) {
84486fc6
GS
3278 if (len < sizeof tmpbuf)
3279 tmpbuf[len] = *s;
491527d0 3280 }
84486fc6
GS
3281 if (len < sizeof tmpbuf)
3282 tmpbuf[len] = '\0';
491527d0 3283#else /* ! (atarist || DOSISH) */
39a02377 3284 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
491527d0
GS
3285 ':',
3286 &len);
3287#endif /* ! (atarist || DOSISH) */
cd39f2b6 3288#endif /* MACOS_TRADITIONAL */
39a02377 3289 if (s < bufend)
491527d0 3290 s++;
84486fc6 3291 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 3292 continue; /* don't search dir with too-long name */
cd39f2b6
JH
3293#ifdef MACOS_TRADITIONAL
3294 if (len && tmpbuf[len - 1] != ':')
3295 tmpbuf[len++] = ':';
3296#else
491527d0 3297 if (len
490a0e98 3298# if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS
3299 && tmpbuf[len - 1] != '/'
3300 && tmpbuf[len - 1] != '\\'
490a0e98 3301# endif
491527d0 3302 )
84486fc6
GS
3303 tmpbuf[len++] = '/';
3304 if (len == 2 && tmpbuf[0] == '.')
491527d0 3305 seen_dot = 1;
cd39f2b6 3306#endif
28f0d0ec 3307 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
491527d0
GS
3308#endif /* !VMS */
3309
3310#ifdef SEARCH_EXTS
84486fc6 3311 len = strlen(tmpbuf);
491527d0
GS
3312 if (extidx > 0) /* reset after previous loop */
3313 extidx = 0;
3314 do {
3315#endif
84486fc6 3316 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 3317 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ
3318 if (S_ISDIR(PL_statbuf.st_mode)) {
3319 retval = -1;
3320 }
491527d0
GS
3321#ifdef SEARCH_EXTS
3322 } while ( retval < 0 /* not there */
3323 && extidx>=0 && ext[extidx] /* try an extension? */
6fca0082 3324 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
491527d0
GS
3325 );
3326#endif
3327 if (retval < 0)
3328 continue;
3280af22
NIS
3329 if (S_ISREG(PL_statbuf.st_mode)
3330 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 3331#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 3332 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS
3333#endif
3334 )
3335 {
3aed30dc 3336 xfound = tmpbuf; /* bingo! */
491527d0
GS
3337 break;
3338 }
3339 if (!xfailed)
84486fc6 3340 xfailed = savepv(tmpbuf);
491527d0
GS
3341 }
3342#ifndef DOSISH
017f25f1 3343 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3344 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3345 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS
3346#endif
3347 seen_dot = 1; /* Disable message. */
9ccb31f9
GS
3348 if (!xfound) {
3349 if (flags & 1) { /* do or die? */
3aed30dc 3350 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS
3351 (xfailed ? "execute" : "find"),
3352 (xfailed ? xfailed : scriptname),
3353 (xfailed ? "" : " on PATH"),
3354 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3355 }
bd61b366 3356 scriptname = NULL;
9ccb31f9 3357 }
43c5f42d 3358 Safefree(xfailed);
491527d0
GS
3359 scriptname = xfound;
3360 }
bd61b366 3361 return (scriptname ? savepv(scriptname) : NULL);
491527d0
GS
3362}
3363
ba869deb
GS
3364#ifndef PERL_GET_CONTEXT_DEFINED
3365
3366void *
3367Perl_get_context(void)
3368{
27da23d5 3369 dVAR;
3db8f154 3370#if defined(USE_ITHREADS)
ba869deb
GS
3371# ifdef OLD_PTHREADS_API
3372 pthread_addr_t t;
3373 if (pthread_getspecific(PL_thr_key, &t))
3374 Perl_croak_nocontext("panic: pthread_getspecific");
3375 return (void*)t;
3376# else
bce813aa 3377# ifdef I_MACH_CTHREADS
8b8b35ab 3378 return (void*)cthread_data(cthread_self());
bce813aa 3379# else
8b8b35ab
JH
3380 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3381# endif
c44d3fdb 3382# endif
ba869deb
GS
3383#else
3384 return (void*)NULL;
3385#endif
3386}
3387
3388void
3389Perl_set_context(void *t)
3390{
8772537c 3391 dVAR;
7918f24d 3392 PERL_ARGS_ASSERT_SET_CONTEXT;
3db8f154 3393#if defined(USE_ITHREADS)
c44d3fdb
GS
3394# ifdef I_MACH_CTHREADS
3395 cthread_set_data(cthread_self(), t);
3396# else
ba869deb
GS
3397 if (pthread_setspecific(PL_thr_key, t))
3398 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3399# endif
b464bac0 3400#else
8772537c 3401 PERL_UNUSED_ARG(t);
ba869deb
GS
3402#endif
3403}
3404
3405#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3406
27da23d5 3407#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3408struct perl_vars *
864dbfa3 3409Perl_GetVars(pTHX)
22239a37 3410{
533c011a 3411 return &PL_Vars;
22239a37 3412}
31fb1209
NIS
3413#endif
3414
1cb0ed9b 3415char **
864dbfa3 3416Perl_get_op_names(pTHX)
31fb1209 3417{
96a5add6
AL
3418 PERL_UNUSED_CONTEXT;
3419 return (char **)PL_op_name;
31fb1209
NIS
3420}
3421
1cb0ed9b 3422char **
864dbfa3 3423Perl_get_op_descs(pTHX)
31fb1209 3424{
96a5add6
AL
3425 PERL_UNUSED_CONTEXT;
3426 return (char **)PL_op_desc;
31fb1209 3427}
9e6b2b00 3428
e1ec3a88 3429const char *
864dbfa3 3430Perl_get_no_modify(pTHX)
9e6b2b00 3431{
96a5add6
AL
3432 PERL_UNUSED_CONTEXT;
3433 return PL_no_modify;
9e6b2b00
GS
3434}
3435
3436U32 *
864dbfa3 3437Perl_get_opargs(pTHX)
9e6b2b00 3438{
96a5add6
AL
3439 PERL_UNUSED_CONTEXT;
3440 return (U32 *)PL_opargs;
9e6b2b00 3441}
51aa15f3 3442
0cb96387
GS
3443PPADDR_t*
3444Perl_get_ppaddr(pTHX)
3445{
96a5add6
AL
3446 dVAR;
3447 PERL_UNUSED_CONTEXT;
3448 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS
3449}
3450
a6c40364
GS
3451#ifndef HAS_GETENV_LEN
3452char *
bf4acbe4 3453Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3454{
8772537c 3455 char * const env_trans = PerlEnv_getenv(env_elem);
96a5add6 3456 PERL_UNUSED_CONTEXT;
7918f24d 3457 PERL_ARGS_ASSERT_GETENV_LEN;
a6c40364
GS
3458 if (env_trans)
3459 *len = strlen(env_trans);
3460 return env_trans;
f675dbe5
CB
3461}
3462#endif
3463
dc9e4912
GS
3464
3465MGVTBL*
864dbfa3 3466Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3467{
7452cf6a 3468 const MGVTBL* result;
96a5add6 3469 PERL_UNUSED_CONTEXT;
dc9e4912
GS
3470
3471 switch(vtbl_id) {
3472 case want_vtbl_sv:
3473 result = &PL_vtbl_sv;
3474 break;
3475 case want_vtbl_env:
3476 result = &PL_vtbl_env;
3477 break;
3478 case want_vtbl_envelem:
3479 result = &PL_vtbl_envelem;
3480 break;
3481 case want_vtbl_sig:
3482 result = &PL_vtbl_sig;
3483 break;
3484 case want_vtbl_sigelem:
3485 result = &PL_vtbl_sigelem;
3486 break;
3487 case want_vtbl_pack:
3488 result = &PL_vtbl_pack;
3489 break;
3490 case want_vtbl_packelem:
3491 result = &PL_vtbl_packelem;
3492 break;
3493 case want_vtbl_dbline:
3494 result = &PL_vtbl_dbline;
3495 break;
3496 case want_vtbl_isa:
3497 result = &PL_vtbl_isa;
3498 break;
3499 case want_vtbl_isaelem:
3500 result = &PL_vtbl_isaelem;
3501 break;
3502 case want_vtbl_arylen:
3503 result = &PL_vtbl_arylen;
3504 break;
dc9e4912
GS
3505 case want_vtbl_mglob:
3506 result = &PL_vtbl_mglob;
3507 break;
3508 case want_vtbl_nkeys:
3509 result = &PL_vtbl_nkeys;
3510 break;
3511 case want_vtbl_taint:
3512 result = &PL_vtbl_taint;
3513 break;
3514 case want_vtbl_substr:
3515 result = &PL_vtbl_substr;
3516 break;
3517 case want_vtbl_vec:
3518 result = &PL_vtbl_vec;
3519 break;
3520 case want_vtbl_pos:
3521 result = &PL_vtbl_pos;
3522 break;
3523 case want_vtbl_bm:
3524 result = &PL_vtbl_bm;
3525 break;
3526 case want_vtbl_fm:
3527 result = &PL_vtbl_fm;
3528 break;
3529 case want_vtbl_uvar:
3530 result = &PL_vtbl_uvar;
3531 break;
dc9e4912
GS
3532 case want_vtbl_defelem:
3533 result = &PL_vtbl_defelem;
3534 break;
3535 case want_vtbl_regexp:
3536 result = &PL_vtbl_regexp;
3537 break;
3538 case want_vtbl_regdata:
3539 result = &PL_vtbl_regdata;
3540 break;
3541 case want_vtbl_regdatum:
3542 result = &PL_vtbl_regdatum;
3543 break;
3c90161d 3544#ifdef USE_LOCALE_COLLATE
dc9e4912
GS
3545 case want_vtbl_collxfrm:
3546 result = &PL_vtbl_collxfrm;
3547 break;
3c90161d 3548#endif
dc9e4912
GS
3549 case want_vtbl_amagic:
3550 result = &PL_vtbl_amagic;
3551 break;
3552 case want_vtbl_amagicelem:
3553 result = &PL_vtbl_amagicelem;
3554 break;
810b8aa5
GS
3555 case want_vtbl_backref:
3556 result = &PL_vtbl_backref;
3557 break;
7e8c5dac
HS
3558 case want_vtbl_utf8:
3559 result = &PL_vtbl_utf8;
3560 break;
7452cf6a 3561 default:
4608196e 3562 result = NULL;
7452cf6a 3563 break;
dc9e4912 3564 }
27da23d5 3565 return (MGVTBL*)result;
dc9e4912
GS
3566}
3567
767df6a1 3568I32
864dbfa3 3569Perl_my_fflush_all(pTHX)
767df6a1 3570{
f800e14d 3571#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3572 return PerlIO_flush(NULL);
767df6a1 3573#else
8fbdfb7c 3574# if defined(HAS__FWALK)
f13a2bc0 3575 extern int fflush(FILE *);
74cac757
JH
3576 /* undocumented, unprototyped, but very useful BSDism */
3577 extern void _fwalk(int (*)(FILE *));
8fbdfb