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Change 34966 should also have removed the SSCHECK(4); from
[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/*
4ac71550
TC
12 * 'Very useful, no doubt, that was to Saruman; yet it seems that he was
13 * not content.' --Gandalf to Pippin
14 *
15 * [p.598 of _The Lord of the Rings_, III/xi: "The Palantír"]
a0d0e21e 16 */
8d063cd8 17
166f8a29
DM
18/* This file contains assorted utility routines.
19 * Which is a polite way of saying any stuff that people couldn't think of
20 * a better place for. Amongst other things, it includes the warning and
21 * dieing stuff, plus wrappers for malloc code.
22 */
23
8d063cd8 24#include "EXTERN.h"
864dbfa3 25#define PERL_IN_UTIL_C
8d063cd8 26#include "perl.h"
62b28dd9 27
64ca3a65 28#ifndef PERL_MICRO
a687059c 29#include <signal.h>
36477c24
PP
30#ifndef SIG_ERR
31# define SIG_ERR ((Sighandler_t) -1)
32#endif
64ca3a65 33#endif
36477c24 34
172d2248
OS
35#ifdef __Lynx__
36/* Missing protos on LynxOS */
37int putenv(char *);
38#endif
39
ff68c719
PP
40#ifdef I_SYS_WAIT
41# include <sys/wait.h>
42#endif
43
868439a2
JH
44#ifdef HAS_SELECT
45# ifdef I_SYS_SELECT
46# include <sys/select.h>
47# endif
48#endif
49
8d063cd8 50#define FLUSH
8d063cd8 51
16cebae2
GS
52#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
53# define FD_CLOEXEC 1 /* NeXT needs this */
54#endif
55
a687059c
LW
56/* NOTE: Do not call the next three routines directly. Use the macros
57 * in handy.h, so that we can easily redefine everything to do tracking of
58 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 59 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW
60 */
61
ca8d8976
NC
62static char *
63S_write_no_mem(pTHX)
64{
97aff369 65 dVAR;
ca8d8976
NC
66 /* Can't use PerlIO to write as it allocates memory */
67 PerlLIO_write(PerlIO_fileno(Perl_error_log),
68 PL_no_mem, strlen(PL_no_mem));
69 my_exit(1);
1f440eb2 70 NORETURN_FUNCTION_END;
ca8d8976
NC
71}
72
26fa51c3
AMS
73/* paranoid version of system's malloc() */
74
bd4080b3 75Malloc_t
4f63d024 76Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 77{
54aff467 78 dTHX;
bd4080b3 79 Malloc_t ptr;
55497cff 80#ifdef HAS_64K_LIMIT
62b28dd9 81 if (size > 0xffff) {
bf49b057 82 PerlIO_printf(Perl_error_log,
16cebae2 83 "Allocation too large: %lx\n", size) FLUSH;
54aff467 84 my_exit(1);
62b28dd9 85 }
55497cff 86#endif /* HAS_64K_LIMIT */
e8dda941
JD
87#ifdef PERL_TRACK_MEMPOOL
88 size += sTHX;
89#endif
34de22dd
LW
90#ifdef DEBUGGING
91 if ((long)size < 0)
4f63d024 92 Perl_croak_nocontext("panic: malloc");
34de22dd 93#endif
12ae5dfc 94 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 95 PERL_ALLOC_CHECK(ptr);
97835f67 96 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
bd61b366 97 if (ptr != NULL) {
e8dda941 98#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
99 struct perl_memory_debug_header *const header
100 = (struct perl_memory_debug_header *)ptr;
9a083ecf
NC
101#endif
102
103#ifdef PERL_POISON
7e337ee0 104 PoisonNew(((char *)ptr), size, char);
9a083ecf 105#endif
7cb608b5 106
9a083ecf 107#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
108 header->interpreter = aTHX;
109 /* Link us into the list. */
110 header->prev = &PL_memory_debug_header;
111 header->next = PL_memory_debug_header.next;
112 PL_memory_debug_header.next = header;
113 header->next->prev = header;
cd1541b2 114# ifdef PERL_POISON
7cb608b5 115 header->size = size;
cd1541b2 116# endif
e8dda941
JD
117 ptr = (Malloc_t)((char*)ptr+sTHX);
118#endif
8d063cd8 119 return ptr;
e8dda941 120}
3280af22 121 else if (PL_nomemok)
bd61b366 122 return NULL;
8d063cd8 123 else {
0bd48802 124 return write_no_mem();
8d063cd8
LW
125 }
126 /*NOTREACHED*/
127}
128
f2517201 129/* paranoid version of system's realloc() */
8d063cd8 130
bd4080b3 131Malloc_t
4f63d024 132Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 133{
54aff467 134 dTHX;
bd4080b3 135 Malloc_t ptr;
9a34ef1d 136#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 137 Malloc_t PerlMem_realloc();
ecfc5424 138#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 139
a1d180c4 140#ifdef HAS_64K_LIMIT
5f05dabc 141 if (size > 0xffff) {
bf49b057 142 PerlIO_printf(Perl_error_log,
5f05dabc 143 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 144 my_exit(1);
5f05dabc 145 }
55497cff 146#endif /* HAS_64K_LIMIT */
7614df0c 147 if (!size) {
f2517201 148 safesysfree(where);
7614df0c
JD
149 return NULL;
150 }
151
378cc40b 152 if (!where)
f2517201 153 return safesysmalloc(size);
e8dda941
JD
154#ifdef PERL_TRACK_MEMPOOL
155 where = (Malloc_t)((char*)where-sTHX);
156 size += sTHX;
7cb608b5
NC
157 {
158 struct perl_memory_debug_header *const header
159 = (struct perl_memory_debug_header *)where;
160
161 if (header->interpreter != aTHX) {
162 Perl_croak_nocontext("panic: realloc from wrong pool");
163 }
164 assert(header->next->prev == header);
165 assert(header->prev->next == header);
cd1541b2 166# ifdef PERL_POISON
7cb608b5
NC
167 if (header->size > size) {
168 const MEM_SIZE freed_up = header->size - size;
169 char *start_of_freed = ((char *)where) + size;
7e337ee0 170 PoisonFree(start_of_freed, freed_up, char);
7cb608b5
NC
171 }
172 header->size = size;
cd1541b2 173# endif
7cb608b5 174 }
e8dda941 175#endif
34de22dd
LW
176#ifdef DEBUGGING
177 if ((long)size < 0)
4f63d024 178 Perl_croak_nocontext("panic: realloc");
34de22dd 179#endif
12ae5dfc 180 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 181 PERL_ALLOC_CHECK(ptr);
a1d180c4 182
4fd0a9b8
NC
183 /* MUST do this fixup first, before doing ANYTHING else, as anything else
184 might allocate memory/free/move memory, and until we do the fixup, it
185 may well be chasing (and writing to) free memory. */
e8dda941 186#ifdef PERL_TRACK_MEMPOOL
4fd0a9b8 187 if (ptr != NULL) {
7cb608b5
NC
188 struct perl_memory_debug_header *const header
189 = (struct perl_memory_debug_header *)ptr;
190
9a083ecf
NC
191# ifdef PERL_POISON
192 if (header->size < size) {
193 const MEM_SIZE fresh = size - header->size;
194 char *start_of_fresh = ((char *)ptr) + size;
7e337ee0 195 PoisonNew(start_of_fresh, fresh, char);
9a083ecf
NC
196 }
197# endif
198
7cb608b5
NC
199 header->next->prev = header;
200 header->prev->next = header;
201
e8dda941 202 ptr = (Malloc_t)((char*)ptr+sTHX);
4fd0a9b8 203 }
e8dda941 204#endif
4fd0a9b8
NC
205
206 /* In particular, must do that fixup above before logging anything via
207 *printf(), as it can reallocate memory, which can cause SEGVs. */
208
209 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
210 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
211
212
213 if (ptr != NULL) {
8d063cd8 214 return ptr;
e8dda941 215 }
3280af22 216 else if (PL_nomemok)
bd61b366 217 return NULL;
8d063cd8 218 else {
0bd48802 219 return write_no_mem();
8d063cd8
LW
220 }
221 /*NOTREACHED*/
222}
223
f2517201 224/* safe version of system's free() */
8d063cd8 225
54310121 226Free_t
4f63d024 227Perl_safesysfree(Malloc_t where)
8d063cd8 228{
e8dda941 229#if defined(PERL_IMPLICIT_SYS) || defined(PERL_TRACK_MEMPOOL)
54aff467 230 dTHX;
97aff369
JH
231#else
232 dVAR;
155aba94 233#endif
97835f67 234 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 235 if (where) {
e8dda941
JD
236#ifdef PERL_TRACK_MEMPOOL
237 where = (Malloc_t)((char*)where-sTHX);
cd1541b2 238 {
7cb608b5
NC
239 struct perl_memory_debug_header *const header
240 = (struct perl_memory_debug_header *)where;
241
242 if (header->interpreter != aTHX) {
243 Perl_croak_nocontext("panic: free from wrong pool");
244 }
245 if (!header->prev) {
cd1541b2
NC
246 Perl_croak_nocontext("panic: duplicate free");
247 }
7cb608b5
NC
248 if (!(header->next) || header->next->prev != header
249 || header->prev->next != header) {
250 Perl_croak_nocontext("panic: bad free");
cd1541b2 251 }
7cb608b5
NC
252 /* Unlink us from the chain. */
253 header->next->prev = header->prev;
254 header->prev->next = header->next;
255# ifdef PERL_POISON
7e337ee0 256 PoisonNew(where, header->size, char);
cd1541b2 257# endif
7cb608b5
NC
258 /* Trigger the duplicate free warning. */
259 header->next = NULL;
260 }
e8dda941 261#endif
6ad3d225 262 PerlMem_free(where);
378cc40b 263 }
8d063cd8
LW
264}
265
f2517201 266/* safe version of system's calloc() */
1050c9ca 267
bd4080b3 268Malloc_t
4f63d024 269Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 270{
54aff467 271 dTHX;
bd4080b3 272 Malloc_t ptr;
ad7244db 273 MEM_SIZE total_size = 0;
1050c9ca 274
ad7244db 275 /* Even though calloc() for zero bytes is strange, be robust. */
19a94d75 276 if (size && (count <= MEM_SIZE_MAX / size))
ad7244db
JH
277 total_size = size * count;
278 else
f1f66076 279 Perl_croak_nocontext("%s", PL_memory_wrap);
ad7244db 280#ifdef PERL_TRACK_MEMPOOL
19a94d75 281 if (sTHX <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
ad7244db
JH
282 total_size += sTHX;
283 else
f1f66076 284 Perl_croak_nocontext("%s", PL_memory_wrap);
ad7244db 285#endif
55497cff 286#ifdef HAS_64K_LIMIT
e1a95402 287 if (total_size > 0xffff) {
bf49b057 288 PerlIO_printf(Perl_error_log,
e1a95402 289 "Allocation too large: %lx\n", total_size) FLUSH;
54aff467 290 my_exit(1);
5f05dabc 291 }
55497cff 292#endif /* HAS_64K_LIMIT */
1050c9ca
PP
293#ifdef DEBUGGING
294 if ((long)size < 0 || (long)count < 0)
4f63d024 295 Perl_croak_nocontext("panic: calloc");
1050c9ca 296#endif
e8dda941 297#ifdef PERL_TRACK_MEMPOOL
e1a95402
NC
298 /* Have to use malloc() because we've added some space for our tracking
299 header. */
ad7244db
JH
300 /* malloc(0) is non-portable. */
301 ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1);
e1a95402
NC
302#else
303 /* Use calloc() because it might save a memset() if the memory is fresh
304 and clean from the OS. */
ad7244db
JH
305 if (count && size)
306 ptr = (Malloc_t)PerlMem_calloc(count, size);
307 else /* calloc(0) is non-portable. */
308 ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1);
e8dda941 309#endif
da927450 310 PERL_ALLOC_CHECK(ptr);
e1a95402 311 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 312 if (ptr != NULL) {
e8dda941 313#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
314 {
315 struct perl_memory_debug_header *const header
316 = (struct perl_memory_debug_header *)ptr;
317
e1a95402 318 memset((void*)ptr, 0, total_size);
7cb608b5
NC
319 header->interpreter = aTHX;
320 /* Link us into the list. */
321 header->prev = &PL_memory_debug_header;
322 header->next = PL_memory_debug_header.next;
323 PL_memory_debug_header.next = header;
324 header->next->prev = header;
cd1541b2 325# ifdef PERL_POISON
e1a95402 326 header->size = total_size;
cd1541b2 327# endif
7cb608b5
NC
328 ptr = (Malloc_t)((char*)ptr+sTHX);
329 }
e8dda941 330#endif
1050c9ca
PP
331 return ptr;
332 }
3280af22 333 else if (PL_nomemok)
bd61b366 334 return NULL;
0bd48802 335 return write_no_mem();
1050c9ca
PP
336}
337
cae6d0e5
GS
338/* These must be defined when not using Perl's malloc for binary
339 * compatibility */
340
341#ifndef MYMALLOC
342
343Malloc_t Perl_malloc (MEM_SIZE nbytes)
344{
345 dTHXs;
077a72a9 346 return (Malloc_t)PerlMem_malloc(nbytes);
cae6d0e5
GS
347}
348
349Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
350{
351 dTHXs;
077a72a9 352 return (Malloc_t)PerlMem_calloc(elements, size);
cae6d0e5
GS
353}
354
355Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
356{
357 dTHXs;
077a72a9 358 return (Malloc_t)PerlMem_realloc(where, nbytes);
cae6d0e5
GS
359}
360
361Free_t Perl_mfree (Malloc_t where)
362{
363 dTHXs;
364 PerlMem_free(where);
365}
366
367#endif
368
8d063cd8
LW
369/* copy a string up to some (non-backslashed) delimiter, if any */
370
371char *
e1ec3a88 372Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
8d063cd8 373{
fc36a67e 374 register I32 tolen;
96a5add6 375 PERL_UNUSED_CONTEXT;
35da51f7 376
7918f24d
NC
377 PERL_ARGS_ASSERT_DELIMCPY;
378
fc36a67e 379 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b 380 if (*from == '\\') {
35da51f7 381 if (from[1] != delim) {
fc36a67e
PP
382 if (to < toend)
383 *to++ = *from;
384 tolen++;
fc36a67e 385 }
35da51f7 386 from++;
378cc40b 387 }
bedebaa5 388 else if (*from == delim)
8d063cd8 389 break;
fc36a67e
PP
390 if (to < toend)
391 *to++ = *from;
8d063cd8 392 }
bedebaa5
CS
393 if (to < toend)
394 *to = '\0';
fc36a67e 395 *retlen = tolen;
73d840c0 396 return (char *)from;
8d063cd8
LW
397}
398
399/* return ptr to little string in big string, NULL if not found */
378cc40b 400/* This routine was donated by Corey Satten. */
8d063cd8
LW
401
402char *
864dbfa3 403Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 404{
79072805 405 register I32 first;
96a5add6 406 PERL_UNUSED_CONTEXT;
378cc40b 407
7918f24d
NC
408 PERL_ARGS_ASSERT_INSTR;
409
a687059c 410 if (!little)
08105a92 411 return (char*)big;
a687059c 412 first = *little++;
378cc40b 413 if (!first)
08105a92 414 return (char*)big;
378cc40b 415 while (*big) {
66a1b24b 416 register const char *s, *x;
378cc40b
LW
417 if (*big++ != first)
418 continue;
419 for (x=big,s=little; *s; /**/ ) {
420 if (!*x)
bd61b366 421 return NULL;
4fc877ac 422 if (*s != *x)
378cc40b 423 break;
4fc877ac
AL
424 else {
425 s++;
426 x++;
378cc40b
LW
427 }
428 }
429 if (!*s)
08105a92 430 return (char*)(big-1);
378cc40b 431 }
bd61b366 432 return NULL;
378cc40b 433}
8d063cd8 434
a687059c
LW
435/* same as instr but allow embedded nulls */
436
437char *
4c8626be 438Perl_ninstr(pTHX_ const char *big, const char *bigend, const char *little, const char *lend)
8d063cd8 439{
7918f24d 440 PERL_ARGS_ASSERT_NINSTR;
96a5add6 441 PERL_UNUSED_CONTEXT;
4c8626be
GA
442 if (little >= lend)
443 return (char*)big;
444 {
8ba22ff4 445 const char first = *little;
4c8626be 446 const char *s, *x;
8ba22ff4 447 bigend -= lend - little++;
4c8626be
GA
448 OUTER:
449 while (big <= bigend) {
b0ca24ee
JH
450 if (*big++ == first) {
451 for (x=big,s=little; s < lend; x++,s++) {
452 if (*s != *x)
453 goto OUTER;
454 }
455 return (char*)(big-1);
4c8626be 456 }
4c8626be 457 }
378cc40b 458 }
bd61b366 459 return NULL;
a687059c
LW
460}
461
462/* reverse of the above--find last substring */
463
464char *
864dbfa3 465Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 466{
08105a92 467 register const char *bigbeg;
e1ec3a88 468 register const I32 first = *little;
7452cf6a 469 register const char * const littleend = lend;
96a5add6 470 PERL_UNUSED_CONTEXT;
a687059c 471
7918f24d
NC
472 PERL_ARGS_ASSERT_RNINSTR;
473
260d78c9 474 if (little >= littleend)
08105a92 475 return (char*)bigend;
a687059c
LW
476 bigbeg = big;
477 big = bigend - (littleend - little++);
478 while (big >= bigbeg) {
66a1b24b 479 register const char *s, *x;
a687059c
LW
480 if (*big-- != first)
481 continue;
482 for (x=big+2,s=little; s < littleend; /**/ ) {
4fc877ac 483 if (*s != *x)
a687059c 484 break;
4fc877ac
AL
485 else {
486 x++;
487 s++;
a687059c
LW
488 }
489 }
490 if (s >= littleend)
08105a92 491 return (char*)(big+1);
378cc40b 492 }
bd61b366 493 return NULL;
378cc40b 494}
a687059c 495
cf93c79d
IZ
496/* As a space optimization, we do not compile tables for strings of length
497 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
498 special-cased in fbm_instr().
499
500 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
501
954c1994 502/*
ccfc67b7
JH
503=head1 Miscellaneous Functions
504
954c1994
GS
505=for apidoc fbm_compile
506
507Analyses the string in order to make fast searches on it using fbm_instr()
508-- the Boyer-Moore algorithm.
509
510=cut
511*/
512
378cc40b 513void
7506f9c3 514Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 515{
97aff369 516 dVAR;
0d46e09a 517 register const U8 *s;
79072805 518 register U32 i;
0b71040e 519 STRLEN len;
cb742848 520 U32 rarest = 0;
79072805
LW
521 U32 frequency = 256;
522
7918f24d
NC
523 PERL_ARGS_ASSERT_FBM_COMPILE;
524
c517dc2b 525 if (flags & FBMcf_TAIL) {
890ce7af 526 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
396482e1 527 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
c517dc2b
JH
528 if (mg && mg->mg_len >= 0)
529 mg->mg_len++;
530 }
9cbe880b 531 s = (U8*)SvPV_force_mutable(sv, len);
d1be9408 532 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 533 return;
cecf5685 534 SvUPGRADE(sv, SVt_PVGV);
78d0cf80 535 SvIOK_off(sv);
8eeaf79a
NC
536 SvNOK_off(sv);
537 SvVALID_on(sv);
02128f11 538 if (len > 2) {
9cbe880b 539 const unsigned char *sb;
66a1b24b 540 const U8 mlen = (len>255) ? 255 : (U8)len;
890ce7af 541 register U8 *table;
cf93c79d 542
d8419e03
NC
543 Sv_Grow(sv, len + 256 + PERL_FBM_TABLE_OFFSET);
544 table
545 = (unsigned char*)(SvPVX_mutable(sv) + len + PERL_FBM_TABLE_OFFSET);
546 s = table - 1 - PERL_FBM_TABLE_OFFSET; /* last char */
7506f9c3 547 memset((void*)table, mlen, 256);
02128f11 548 i = 0;
7506f9c3 549 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ
550 while (s >= sb) {
551 if (table[*s] == mlen)
7506f9c3 552 table[*s] = (U8)i;
cf93c79d
IZ
553 s--, i++;
554 }
d0688fc4
NC
555 } else {
556 Sv_Grow(sv, len + PERL_FBM_TABLE_OFFSET);
378cc40b 557 }
a0714e2c 558 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
378cc40b 559
9cbe880b 560 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 561 for (i = 0; i < len; i++) {
22c35a8c 562 if (PL_freq[s[i]] < frequency) {
bbce6d69 563 rarest = i;
22c35a8c 564 frequency = PL_freq[s[i]];
378cc40b
LW
565 }
566 }
610460f9 567 BmFLAGS(sv) = (U8)flags;
79072805 568 BmRARE(sv) = s[rarest];
44a10c71 569 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ
570 BmUSEFUL(sv) = 100; /* Initial value */
571 if (flags & FBMcf_TAIL)
572 SvTAIL_on(sv);
8eeaf79a
NC
573 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %lu\n",
574 BmRARE(sv),(unsigned long)BmPREVIOUS(sv)));
378cc40b
LW
575}
576
cf93c79d
IZ
577/* If SvTAIL(littlestr), it has a fake '\n' at end. */
578/* If SvTAIL is actually due to \Z or \z, this gives false positives
579 if multiline */
580
954c1994
GS
581/*
582=for apidoc fbm_instr
583
584Returns the location of the SV in the string delimited by C<str> and
bd61b366 585C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
954c1994
GS
586does not have to be fbm_compiled, but the search will not be as fast
587then.
588
589=cut
590*/
591
378cc40b 592char *
864dbfa3 593Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 594{
a687059c 595 register unsigned char *s;
cf93c79d 596 STRLEN l;
9cbe880b
NC
597 register const unsigned char *little
598 = (const unsigned char *)SvPV_const(littlestr,l);
cf93c79d 599 register STRLEN littlelen = l;
e1ec3a88 600 register const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 601
7918f24d
NC
602 PERL_ARGS_ASSERT_FBM_INSTR;
603
eb160463 604 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 605 if ( SvTAIL(littlestr)
eb160463 606 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 607 && (littlelen == 1
12ae5dfc 608 || (*big == *little &&
27da23d5 609 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d 610 return (char*)big;
bd61b366 611 return NULL;
cf93c79d 612 }
378cc40b 613
cf93c79d 614 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ
615
616 if (littlelen == 1) {
617 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
618 /* Know that bigend != big. */
619 if (bigend[-1] == '\n')
620 return (char *)(bigend - 1);
621 return (char *) bigend;
622 }
623 s = big;
624 while (s < bigend) {
625 if (*s == *little)
626 return (char *)s;
627 s++;
628 }
629 if (SvTAIL(littlestr))
630 return (char *) bigend;
bd61b366 631 return NULL;
cf93c79d
IZ
632 }
633 if (!littlelen)
634 return (char*)big; /* Cannot be SvTAIL! */
635
636 /* littlelen is 2 */
637 if (SvTAIL(littlestr) && !multiline) {
638 if (bigend[-1] == '\n' && bigend[-2] == *little)
639 return (char*)bigend - 2;
640 if (bigend[-1] == *little)
641 return (char*)bigend - 1;
bd61b366 642 return NULL;
cf93c79d
IZ
643 }
644 {
645 /* This should be better than FBM if c1 == c2, and almost
646 as good otherwise: maybe better since we do less indirection.
647 And we save a lot of memory by caching no table. */
66a1b24b
AL
648 const unsigned char c1 = little[0];
649 const unsigned char c2 = little[1];
cf93c79d
IZ
650
651 s = big + 1;
652 bigend--;
653 if (c1 != c2) {
654 while (s <= bigend) {
655 if (s[0] == c2) {
656 if (s[-1] == c1)
657 return (char*)s - 1;
658 s += 2;
659 continue;
3fe6f2dc 660 }
cf93c79d
IZ
661 next_chars:
662 if (s[0] == c1) {
663 if (s == bigend)
664 goto check_1char_anchor;
665 if (s[1] == c2)
666 return (char*)s;
667 else {
668 s++;
669 goto next_chars;
670 }
671 }
672 else
673 s += 2;
674 }
675 goto check_1char_anchor;
676 }
677 /* Now c1 == c2 */
678 while (s <= bigend) {
679 if (s[0] == c1) {
680 if (s[-1] == c1)
681 return (char*)s - 1;
682 if (s == bigend)
683 goto check_1char_anchor;
684 if (s[1] == c1)
685 return (char*)s;
686 s += 3;
02128f11 687 }
c277df42 688 else
cf93c79d 689 s += 2;
c277df42 690 }
c277df42 691 }
cf93c79d
IZ
692 check_1char_anchor: /* One char and anchor! */
693 if (SvTAIL(littlestr) && (*bigend == *little))
694 return (char *)bigend; /* bigend is already decremented. */
bd61b366 695 return NULL;
d48672a2 696 }
cf93c79d 697 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 698 s = bigend - littlelen;
a1d180c4 699 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ
700 /* Automatically of length > 2 */
701 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 702 {
bbce6d69 703 return (char*)s; /* how sweet it is */
7506f9c3
GS
704 }
705 if (s[1] == *little
706 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
707 {
cf93c79d 708 return (char*)s + 1; /* how sweet it is */
7506f9c3 709 }
bd61b366 710 return NULL;
02128f11 711 }
cecf5685 712 if (!SvVALID(littlestr)) {
c4420975 713 char * const b = ninstr((char*)big,(char*)bigend,
cf93c79d
IZ
714 (char*)little, (char*)little + littlelen);
715
716 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
717 /* Chop \n from littlestr: */
718 s = bigend - littlelen + 1;
7506f9c3
GS
719 if (*s == *little
720 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
721 {
3fe6f2dc 722 return (char*)s;
7506f9c3 723 }
bd61b366 724 return NULL;
a687059c 725 }
cf93c79d 726 return b;
a687059c 727 }
a1d180c4 728
3566a07d
NC
729 /* Do actual FBM. */
730 if (littlelen > (STRLEN)(bigend - big))
731 return NULL;
732
733 {
d8419e03
NC
734 register const unsigned char * const table
735 = little + littlelen + PERL_FBM_TABLE_OFFSET;
0d46e09a 736 register const unsigned char *oldlittle;
cf93c79d 737
cf93c79d
IZ
738 --littlelen; /* Last char found by table lookup */
739
740 s = big + littlelen;
741 little += littlelen; /* last char */
742 oldlittle = little;
743 if (s < bigend) {
744 register I32 tmp;
745
746 top2:
7506f9c3 747 if ((tmp = table[*s])) {
cf93c79d 748 if ((s += tmp) < bigend)
62b28dd9 749 goto top2;
cf93c79d
IZ
750 goto check_end;
751 }
752 else { /* less expensive than calling strncmp() */
66a1b24b 753 register unsigned char * const olds = s;
cf93c79d
IZ
754
755 tmp = littlelen;
756
757 while (tmp--) {
758 if (*--s == *--little)
759 continue;
cf93c79d
IZ
760 s = olds + 1; /* here we pay the price for failure */
761 little = oldlittle;
762 if (s < bigend) /* fake up continue to outer loop */
763 goto top2;
764 goto check_end;
765 }
766 return (char *)s;
a687059c 767 }
378cc40b 768 }
cf93c79d 769 check_end:
c8029a41 770 if ( s == bigend
8eeaf79a 771 && (BmFLAGS(littlestr) & FBMcf_TAIL)
12ae5dfc
JH
772 && memEQ((char *)(bigend - littlelen),
773 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d 774 return (char*)bigend - littlelen;
bd61b366 775 return NULL;
378cc40b 776 }
378cc40b
LW
777}
778
c277df42
IZ
779/* start_shift, end_shift are positive quantities which give offsets
780 of ends of some substring of bigstr.
a0288114 781 If "last" we want the last occurrence.
c277df42 782 old_posp is the way of communication between consequent calls if
a1d180c4 783 the next call needs to find the .
c277df42 784 The initial *old_posp should be -1.
cf93c79d
IZ
785
786 Note that we take into account SvTAIL, so one can get extra
787 optimizations if _ALL flag is set.
c277df42
IZ
788 */
789
cf93c79d 790/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 791 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ
792 is not supported yet. */
793
378cc40b 794char *
864dbfa3 795Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 796{
97aff369 797 dVAR;
0d46e09a 798 register const unsigned char *big;
79072805
LW
799 register I32 pos;
800 register I32 previous;
801 register I32 first;
0d46e09a 802 register const unsigned char *little;
c277df42 803 register I32 stop_pos;
0d46e09a 804 register const unsigned char *littleend;
c277df42 805 I32 found = 0;
378cc40b 806
7918f24d
NC
807 PERL_ARGS_ASSERT_SCREAMINSTR;
808
cecf5685
NC
809 assert(SvTYPE(littlestr) == SVt_PVGV);
810 assert(SvVALID(littlestr));
d372c834 811
c277df42 812 if (*old_posp == -1
3280af22 813 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ
814 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
815 cant_find:
a1d180c4 816 if ( BmRARE(littlestr) == '\n'
85c508c3 817 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
cfd0369c 818 little = (const unsigned char *)(SvPVX_const(littlestr));
cf93c79d
IZ
819 littleend = little + SvCUR(littlestr);
820 first = *little++;
821 goto check_tail;
822 }
bd61b366 823 return NULL;
cf93c79d
IZ
824 }
825
cfd0369c 826 little = (const unsigned char *)(SvPVX_const(littlestr));
79072805 827 littleend = little + SvCUR(littlestr);
378cc40b 828 first = *little++;
c277df42 829 /* The value of pos we can start at: */
79072805 830 previous = BmPREVIOUS(littlestr);
cfd0369c 831 big = (const unsigned char *)(SvPVX_const(bigstr));
c277df42
IZ
832 /* The value of pos we can stop at: */
833 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 834 if (previous + start_shift > stop_pos) {
0fe87f7c
HS
835/*
836 stop_pos does not include SvTAIL in the count, so this check is incorrect
837 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
838*/
839#if 0
cf93c79d
IZ
840 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
841 goto check_tail;
0fe87f7c 842#endif
bd61b366 843 return NULL;
cf93c79d 844 }
c277df42 845 while (pos < previous + start_shift) {
3280af22 846 if (!(pos += PL_screamnext[pos]))
cf93c79d 847 goto cant_find;
378cc40b 848 }
de3bb511 849 big -= previous;
bbce6d69 850 do {
0d46e09a 851 register const unsigned char *s, *x;
ef64f398 852 if (pos >= stop_pos) break;
bbce6d69
PP
853 if (big[pos] != first)
854 continue;
855 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69
PP
856 if (*s++ != *x++) {
857 s--;
858 break;
378cc40b 859 }
bbce6d69 860 }
c277df42
IZ
861 if (s == littleend) {
862 *old_posp = pos;
863 if (!last) return (char *)(big+pos);
864 found = 1;
865 }
3280af22 866 } while ( pos += PL_screamnext[pos] );
a1d180c4 867 if (last && found)
cf93c79d 868 return (char *)(big+(*old_posp));
cf93c79d
IZ
869 check_tail:
870 if (!SvTAIL(littlestr) || (end_shift > 0))
bd61b366 871 return NULL;
cf93c79d 872 /* Ignore the trailing "\n". This code is not microoptimized */
cfd0369c 873 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
cf93c79d
IZ
874 stop_pos = littleend - little; /* Actual littlestr len */
875 if (stop_pos == 0)
876 return (char*)big;
877 big -= stop_pos;
878 if (*big == first
12ae5dfc
JH
879 && ((stop_pos == 1) ||
880 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d 881 return (char*)big;
bd61b366 882 return NULL;
8d063cd8
LW
883}
884
79072805 885I32
864dbfa3 886Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 887{
e1ec3a88
AL
888 register const U8 *a = (const U8 *)s1;
889 register const U8 *b = (const U8 *)s2;
96a5add6
AL
890 PERL_UNUSED_CONTEXT;
891
7918f24d
NC
892 PERL_ARGS_ASSERT_IBCMP;
893
79072805 894 while (len--) {
22c35a8c 895 if (*a != *b && *a != PL_fold[*b])
bbce6d69
PP
896 return 1;
897 a++,b++;
898 }
899 return 0;
900}
901
902I32
864dbfa3 903Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 904{
27da23d5 905 dVAR;
e1ec3a88
AL
906 register const U8 *a = (const U8 *)s1;
907 register const U8 *b = (const U8 *)s2;
96a5add6
AL
908 PERL_UNUSED_CONTEXT;
909
7918f24d
NC
910 PERL_ARGS_ASSERT_IBCMP_LOCALE;
911
bbce6d69 912 while (len--) {
22c35a8c 913 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69
PP
914 return 1;
915 a++,b++;
79072805
LW
916 }
917 return 0;
918}
919
8d063cd8
LW
920/* copy a string to a safe spot */
921
954c1994 922/*
ccfc67b7
JH
923=head1 Memory Management
924
954c1994
GS
925=for apidoc savepv
926
61a925ed
AMS
927Perl's version of C<strdup()>. Returns a pointer to a newly allocated
928string which is a duplicate of C<pv>. The size of the string is
929determined by C<strlen()>. The memory allocated for the new string can
930be freed with the C<Safefree()> function.
954c1994
GS
931
932=cut
933*/
934
8d063cd8 935char *
efdfce31 936Perl_savepv(pTHX_ const char *pv)
8d063cd8 937{
96a5add6 938 PERL_UNUSED_CONTEXT;
e90e2364 939 if (!pv)
bd61b366 940 return NULL;
66a1b24b
AL
941 else {
942 char *newaddr;
943 const STRLEN pvlen = strlen(pv)+1;
10edeb5d
JH
944 Newx(newaddr, pvlen, char);
945 return (char*)memcpy(newaddr, pv, pvlen);
66a1b24b 946 }
8d063cd8
LW
947}
948
a687059c
LW
949/* same thing but with a known length */
950
954c1994
GS
951/*
952=for apidoc savepvn
953
61a925ed
AMS
954Perl's version of what C<strndup()> would be if it existed. Returns a
955pointer to a newly allocated string which is a duplicate of the first
cbf82dd0
NC
956C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
957the new string can be freed with the C<Safefree()> function.
954c1994
GS
958
959=cut
960*/
961
a687059c 962char *
efdfce31 963Perl_savepvn(pTHX_ const char *pv, register I32 len)
a687059c
LW
964{
965 register char *newaddr;
96a5add6 966 PERL_UNUSED_CONTEXT;
a687059c 967
a02a5408 968 Newx(newaddr,len+1,char);
92110913 969 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 970 if (pv) {
e90e2364
NC
971 /* might not be null terminated */
972 newaddr[len] = '\0';
07409e01 973 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS
974 }
975 else {
07409e01 976 return (char *) ZeroD(newaddr,len+1,char);
92110913 977 }
a687059c
LW
978}
979
05ec9bb3
NIS
980/*
981=for apidoc savesharedpv
982
61a925ed
AMS
983A version of C<savepv()> which allocates the duplicate string in memory
984which is shared between threads.
05ec9bb3
NIS
985
986=cut
987*/
988char *
efdfce31 989Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 990{
e90e2364 991 register char *newaddr;
490a0e98 992 STRLEN pvlen;
e90e2364 993 if (!pv)
bd61b366 994 return NULL;
e90e2364 995
490a0e98
NC
996 pvlen = strlen(pv)+1;
997 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364 998 if (!newaddr) {
0bd48802 999 return write_no_mem();
05ec9bb3 1000 }
10edeb5d 1001 return (char*)memcpy(newaddr, pv, pvlen);
05ec9bb3
NIS
1002}
1003
2e0de35c 1004/*
d9095cec
NC
1005=for apidoc savesharedpvn
1006
1007A version of C<savepvn()> which allocates the duplicate string in memory
1008which is shared between threads. (With the specific difference that a NULL
1009pointer is not acceptable)
1010
1011=cut
1012*/
1013char *
1014Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
1015{
1016 char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
7918f24d
NC
1017
1018 PERL_ARGS_ASSERT_SAVESHAREDPVN;
1019
d9095cec
NC
1020 if (!newaddr) {
1021 return write_no_mem();
1022 }
1023 newaddr[len] = '\0';
1024 return (char*)memcpy(newaddr, pv, len);
1025}
1026
1027/*
2e0de35c
NC
1028=for apidoc savesvpv
1029
6832267f 1030A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC
1031the passed in SV using C<SvPV()>
1032
1033=cut
1034*/
1035
1036char *
1037Perl_savesvpv(pTHX_ SV *sv)
1038{
1039 STRLEN len;
7452cf6a 1040 const char * const pv = SvPV_const(sv, len);
2e0de35c
NC
1041 register char *newaddr;
1042
7918f24d
NC
1043 PERL_ARGS_ASSERT_SAVESVPV;
1044
26866f99 1045 ++len;
a02a5408 1046 Newx(newaddr,len,char);
07409e01 1047 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 1048}
05ec9bb3
NIS
1049
1050
cea2e8a9 1051/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 1052
76e3520e 1053STATIC SV *
cea2e8a9 1054S_mess_alloc(pTHX)
fc36a67e 1055{
97aff369 1056 dVAR;
fc36a67e
PP
1057 SV *sv;
1058 XPVMG *any;
1059
e72dc28c 1060 if (!PL_dirty)
84bafc02 1061 return newSVpvs_flags("", SVs_TEMP);
e72dc28c 1062
0372dbb6
GS
1063 if (PL_mess_sv)
1064 return PL_mess_sv;
1065
fc36a67e 1066 /* Create as PVMG now, to avoid any upgrading later */
a02a5408
JC
1067 Newx(sv, 1, SV);
1068 Newxz(any, 1, XPVMG);
fc36a67e
PP
1069 SvFLAGS(sv) = SVt_PVMG;
1070 SvANY(sv) = (void*)any;
6136c704 1071 SvPV_set(sv, NULL);
fc36a67e 1072 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 1073 PL_mess_sv = sv;
fc36a67e
PP
1074 return sv;
1075}
1076
c5be433b 1077#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1078char *
1079Perl_form_nocontext(const char* pat, ...)
1080{
1081 dTHX;
c5be433b 1082 char *retval;
cea2e8a9 1083 va_list args;
7918f24d 1084 PERL_ARGS_ASSERT_FORM_NOCONTEXT;
cea2e8a9 1085 va_start(args, pat);
c5be433b 1086 retval = vform(pat, &args);
cea2e8a9 1087 va_end(args);
c5be433b 1088 return retval;
cea2e8a9 1089}
c5be433b 1090#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1091
7c9e965c 1092/*
ccfc67b7 1093=head1 Miscellaneous Functions
7c9e965c
JP
1094=for apidoc form
1095
1096Takes a sprintf-style format pattern and conventional
1097(non-SV) arguments and returns the formatted string.
1098
1099 (char *) Perl_form(pTHX_ const char* pat, ...)
1100
1101can be used any place a string (char *) is required:
1102
1103 char * s = Perl_form("%d.%d",major,minor);
1104
1105Uses a single private buffer so if you want to format several strings you
1106must explicitly copy the earlier strings away (and free the copies when you
1107are done).
1108
1109=cut
1110*/
1111
8990e307 1112char *
864dbfa3 1113Perl_form(pTHX_ const char* pat, ...)
8990e307 1114{
c5be433b 1115 char *retval;
46fc3d4c 1116 va_list args;
7918f24d 1117 PERL_ARGS_ASSERT_FORM;
46fc3d4c 1118 va_start(args, pat);
c5be433b 1119 retval = vform(pat, &args);
46fc3d4c 1120 va_end(args);
c5be433b
GS
1121 return retval;
1122}
1123
1124char *
1125Perl_vform(pTHX_ const char *pat, va_list *args)
1126{
2d03de9c 1127 SV * const sv = mess_alloc();
7918f24d 1128 PERL_ARGS_ASSERT_VFORM;
4608196e 1129 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
e72dc28c 1130 return SvPVX(sv);
46fc3d4c 1131}
a687059c 1132
5a844595
GS
1133#if defined(PERL_IMPLICIT_CONTEXT)
1134SV *
1135Perl_mess_nocontext(const char *pat, ...)
1136{
1137 dTHX;
1138 SV *retval;
1139 va_list args;
7918f24d 1140 PERL_ARGS_ASSERT_MESS_NOCONTEXT;
5a844595
GS
1141 va_start(args, pat);
1142 retval = vmess(pat, &args);
1143 va_end(args);
1144 return retval;
1145}
1146#endif /* PERL_IMPLICIT_CONTEXT */
1147
06bf62c7 1148SV *
5a844595
GS
1149Perl_mess(pTHX_ const char *pat, ...)
1150{
1151 SV *retval;
1152 va_list args;
7918f24d 1153 PERL_ARGS_ASSERT_MESS;
5a844595
GS
1154 va_start(args, pat);
1155 retval = vmess(pat, &args);
1156 va_end(args);
1157 return retval;
1158}
1159
5f66b61c
AL
1160STATIC const COP*
1161S_closest_cop(pTHX_ const COP *cop, const OP *o)
ae7d165c 1162{
97aff369 1163 dVAR;
ae7d165c
PJ
1164 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1165
7918f24d
NC
1166 PERL_ARGS_ASSERT_CLOSEST_COP;
1167
fabdb6c0
AL
1168 if (!o || o == PL_op)
1169 return cop;
ae7d165c
PJ
1170
1171 if (o->op_flags & OPf_KIDS) {
5f66b61c 1172 const OP *kid;
fabdb6c0 1173 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
5f66b61c 1174 const COP *new_cop;
ae7d165c
PJ
1175
1176 /* If the OP_NEXTSTATE has been optimised away we can still use it
1177 * the get the file and line number. */
1178
1179 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
5f66b61c 1180 cop = (const COP *)kid;
ae7d165c
PJ
1181
1182 /* Keep searching, and return when we've found something. */
1183
1184 new_cop = closest_cop(cop, kid);
fabdb6c0
AL
1185 if (new_cop)
1186 return new_cop;
ae7d165c
PJ
1187 }
1188 }
1189
1190 /* Nothing found. */
1191
5f66b61c 1192 return NULL;
ae7d165c
PJ
1193}
1194
5a844595
GS
1195SV *
1196Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1197{
97aff369 1198 dVAR;
c4420975 1199 SV * const sv = mess_alloc();
46fc3d4c 1200
7918f24d
NC
1201 PERL_ARGS_ASSERT_VMESS;
1202
5f66b61c 1203 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
46fc3d4c 1204 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ
1205 /*
1206 * Try and find the file and line for PL_op. This will usually be
1207 * PL_curcop, but it might be a cop that has been optimised away. We
1208 * can try to find such a cop by searching through the optree starting
1209 * from the sibling of PL_curcop.
1210 */
1211
e1ec3a88 1212 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
5f66b61c
AL
1213 if (!cop)
1214 cop = PL_curcop;
ae7d165c
PJ
1215
1216 if (CopLINE(cop))
ed094faf 1217 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
3aed30dc 1218 OutCopFILE(cop), (IV)CopLINE(cop));
191f87d5
DH
1219 /* Seems that GvIO() can be untrustworthy during global destruction. */
1220 if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO)
1221 && IoLINES(GvIOp(PL_last_in_gv)))
1222 {
e1ec3a88 1223 const bool line_mode = (RsSIMPLE(PL_rs) &&
95a20fc0 1224 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
57def98f 1225 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
5f66b61c 1226 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
edc2eac3
JH
1227 line_mode ? "line" : "chunk",
1228 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1229 }
5f66b61c
AL
1230 if (PL_dirty)
1231 sv_catpvs(sv, " during global destruction");
1232 sv_catpvs(sv, ".\n");
a687059c 1233 }
06bf62c7 1234 return sv;
a687059c
LW
1235}
1236
7ff03255
SG
1237void
1238Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1239{
27da23d5 1240 dVAR;
7ff03255
SG
1241 IO *io;
1242 MAGIC *mg;
1243
7918f24d
NC
1244 PERL_ARGS_ASSERT_WRITE_TO_STDERR;
1245
7ff03255
SG
1246 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1247 && (io = GvIO(PL_stderrgv))
daba3364 1248 && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
7ff03255
SG
1249 {
1250 dSP;
1251 ENTER;
1252 SAVETMPS;
1253
1254 save_re_context();
1255 SAVESPTR(PL_stderrgv);
a0714e2c 1256 PL_stderrgv = NULL;
7ff03255
SG
1257
1258 PUSHSTACKi(PERLSI_MAGIC);
1259
1260 PUSHMARK(SP);
1261 EXTEND(SP,2);
daba3364 1262 PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
6e449a3a 1263 mPUSHp(message, msglen);
7ff03255
SG
1264 PUTBACK;
1265 call_method("PRINT", G_SCALAR);
1266
1267 POPSTACK;
1268 FREETMPS;
1269 LEAVE;
1270 }
1271 else {
1272#ifdef USE_SFIO
1273 /* SFIO can really mess with your errno */
53c1dcc0 1274 const int e = errno;
7ff03255 1275#endif
53c1dcc0 1276 PerlIO * const serr = Perl_error_log;
7ff03255
SG
1277
1278 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1279 (void)PerlIO_flush(serr);
1280#ifdef USE_SFIO
1281 errno = e;
1282#endif
1283 }
1284}
1285
46d9c920 1286/* Common code used by vcroak, vdie, vwarn and vwarner */
3ab1ac99 1287
46d9c920
NC
1288STATIC bool
1289S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
63315e18 1290{
97aff369 1291 dVAR;
63315e18
NC
1292 HV *stash;
1293 GV *gv;
1294 CV *cv;
46d9c920
NC
1295 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1296 /* sv_2cv might call Perl_croak() or Perl_warner() */
1297 SV * const oldhook = *hook;
1298
1299 assert(oldhook);
63315e18 1300
63315e18 1301 ENTER;
46d9c920
NC
1302 SAVESPTR(*hook);
1303 *hook = NULL;
1304 cv = sv_2cv(oldhook, &stash, &gv, 0);
63315e18
NC
1305 LEAVE;
1306 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1307 dSP;
1308 SV *msg;
1309
1310 ENTER;
1311 save_re_context();
46d9c920
NC
1312 if (warn) {
1313 SAVESPTR(*hook);
1314 *hook = NULL;
1315 }
1316 if (warn || message) {
740cce10 1317 msg = newSVpvn_flags(message, msglen, utf8);
63315e18
NC
1318 SvREADONLY_on(msg);
1319 SAVEFREESV(msg);
1320 }
1321 else {
1322 msg = ERRSV;
1323 }
1324
46d9c920 1325 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
63315e18
NC
1326 PUSHMARK(SP);
1327 XPUSHs(msg);
1328 PUTBACK;
daba3364 1329 call_sv(MUTABLE_SV(cv), G_DISCARD);
63315e18
NC
1330 POPSTACK;
1331 LEAVE;
46d9c920 1332 return TRUE;
63315e18 1333 }
46d9c920 1334 return FALSE;
63315e18
NC
1335}
1336
cfd0369c 1337STATIC const char *
e07360fa
AT
1338S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1339 I32* utf8)
1340{
1341 dVAR;
cfd0369c 1342 const char *message;
e07360fa
AT
1343
1344 if (pat) {
890ce7af 1345 SV * const msv = vmess(pat, args);
e07360fa
AT
1346 if (PL_errors && SvCUR(PL_errors)) {
1347 sv_catsv(PL_errors, msv);
cfd0369c 1348 message = SvPV_const(PL_errors, *msglen);
e07360fa
AT
1349 SvCUR_set(PL_errors, 0);
1350 }
1351 else
cfd0369c 1352 message = SvPV_const(msv,*msglen);
e07360fa
AT
1353 *utf8 = SvUTF8(msv);
1354 }
1355 else {
bd61b366 1356 message = NULL;
e07360fa
AT
1357 }
1358
e07360fa 1359 if (PL_diehook) {
46d9c920 1360 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
e07360fa
AT
1361 }
1362 return message;
1363}
1364
1f676739 1365static OP *
e3cf49e2 1366S_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1367{
97aff369 1368 dVAR;
73d840c0 1369 const char *message;
e1ec3a88 1370 const int was_in_eval = PL_in_eval;
06bf62c7 1371 STRLEN msglen;
ff882698 1372 I32 utf8 = 0;
36477c24 1373
890ce7af 1374 message = vdie_croak_common(pat, args, &msglen, &utf8);
36477c24 1375
06bf62c7 1376 PL_restartop = die_where(message, msglen);
ff882698 1377 SvFLAGS(ERRSV) |= utf8;
3280af22 1378 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1379 JMPENV_JUMP(3);
3280af22 1380 return PL_restartop;
36477c24
PP
1381}
1382
c5be433b 1383#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1384OP *
1385Perl_die_nocontext(const char* pat, ...)
a687059c 1386{
cea2e8a9
GS
1387 dTHX;
1388 OP *o;
a687059c 1389 va_list args;
7918f24d 1390 PERL_ARGS_ASSERT_DIE_NOCONTEXT;
cea2e8a9 1391 va_start(args, pat);
c5be433b 1392 o = vdie(pat, &args);
cea2e8a9
GS
1393 va_end(args);
1394 return o;
1395}
c5be433b 1396#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS
1397
1398OP *
1399Perl_die(pTHX_ const char* pat, ...)
1400{
1401 OP *o;
1402 va_list args;
1403 va_start(args, pat);
c5be433b 1404 o = vdie(pat, &args);
cea2e8a9
GS
1405 va_end(args);
1406 return o;
1407}
1408
c5be433b
GS
1409void
1410Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1411{
97aff369 1412 dVAR;
73d840c0 1413 const char *message;
06bf62c7 1414 STRLEN msglen;
ff882698 1415 I32 utf8 = 0;
a687059c 1416
3ab1ac99 1417 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
5a844595 1418
3280af22 1419 if (PL_in_eval) {
06bf62c7 1420 PL_restartop = die_where(message, msglen);
ff882698 1421 SvFLAGS(ERRSV) |= utf8;
6224f72b 1422 JMPENV_JUMP(3);
a0d0e21e 1423 }
84414e3e 1424 else if (!message)
cfd0369c 1425 message = SvPVx_const(ERRSV, msglen);
84414e3e 1426
7ff03255 1427 write_to_stderr(message, msglen);
f86702cc 1428 my_failure_exit();
a687059c
LW
1429}
1430
c5be433b 1431#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1432void
cea2e8a9 1433Perl_croak_nocontext(const char *pat, ...)
a687059c 1434{
cea2e8a9 1435 dTHX;
a687059c 1436 va_list args;
cea2e8a9 1437 va_start(args, pat);
c5be433b 1438 vcroak(pat, &args);
cea2e8a9
GS
1439 /* NOTREACHED */
1440 va_end(args);
1441}
1442#endif /* PERL_IMPLICIT_CONTEXT */
1443
954c1994 1444/*
ccfc67b7
JH
1445=head1 Warning and Dieing
1446
954c1994
GS
1447=for apidoc croak
1448
9983fa3c 1449This is the XSUB-writer's interface to Perl's C<die> function.
966353fd
MF
1450Normally call this function the same way you call the C C<printf>
1451function. Calling C<croak> returns control directly to Perl,
1452sidestepping the normal C order of execution. See C<warn>.
9983fa3c
GS
1453
1454If you want to throw an exception object, assign the object to
bd61b366 1455C<$@> and then pass C<NULL> to croak():
9983fa3c
GS
1456
1457 errsv = get_sv("@", TRUE);
1458 sv_setsv(errsv, exception_object);
bd61b366 1459 croak(NULL);
954c1994
GS
1460
1461=cut
1462*/
1463
cea2e8a9
GS
1464void
1465Perl_croak(pTHX_ const char *pat, ...)
1466{
1467 va_list args;
1468 va_start(args, pat);
c5be433b 1469 vcroak(pat, &args);
cea2e8a9
GS
1470 /* NOTREACHED */
1471 va_end(args);
1472}
1473
c5be433b
GS
1474void
1475Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1476{
27da23d5 1477 dVAR;
06bf62c7 1478 STRLEN msglen;
53c1dcc0
AL
1479 SV * const msv = vmess(pat, args);
1480 const I32 utf8 = SvUTF8(msv);
1481 const char * const message = SvPV_const(msv, msglen);
a687059c 1482
7918f24d
NC
1483 PERL_ARGS_ASSERT_VWARN;
1484
3280af22 1485 if (PL_warnhook) {
46d9c920 1486 if (vdie_common(message, msglen, utf8, TRUE))
20cec16a 1487 return;
748a9306 1488 }
87582a92 1489
7ff03255 1490 write_to_stderr(message, msglen);
a687059c 1491}
8d063cd8 1492
c5be433b 1493#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1494void
1495Perl_warn_nocontext(const char *pat, ...)
1496{
1497 dTHX;
1498 va_list args;
7918f24d 1499 PERL_ARGS_ASSERT_WARN_NOCONTEXT;
cea2e8a9 1500 va_start(args, pat);
c5be433b 1501 vwarn(pat, &args);
cea2e8a9
GS
1502 va_end(args);
1503}
1504#endif /* PERL_IMPLICIT_CONTEXT */
1505
954c1994
GS
1506/*
1507=for apidoc warn
1508
966353fd
MF
1509This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1510function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS
1511
1512=cut
1513*/
1514
cea2e8a9
GS
1515void
1516Perl_warn(pTHX_ const char *pat, ...)
1517{
1518 va_list args;
7918f24d 1519 PERL_ARGS_ASSERT_WARN;
cea2e8a9 1520 va_start(args, pat);
c5be433b 1521 vwarn(pat, &args);
cea2e8a9
GS
1522 va_end(args);
1523}
1524
c5be433b
GS
1525#if defined(PERL_IMPLICIT_CONTEXT)
1526void
1527Perl_warner_nocontext(U32 err, const char *pat, ...)
1528{
27da23d5 1529 dTHX;
c5be433b 1530 va_list args;
7918f24d 1531 PERL_ARGS_ASSERT_WARNER_NOCONTEXT;
c5be433b
GS
1532 va_start(args, pat);
1533 vwarner(err, pat, &args);
1534 va_end(args);
1535}
1536#endif /* PERL_IMPLICIT_CONTEXT */
1537
599cee73 1538void
864dbfa3 1539Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM
1540{
1541 va_list args;
7918f24d 1542 PERL_ARGS_ASSERT_WARNER;
c5be433b
GS
1543 va_start(args, pat);
1544 vwarner(err, pat, &args);
1545 va_end(args);
1546}
1547
1548void
1549Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1550{
27da23d5 1551 dVAR;
7918f24d 1552 PERL_ARGS_ASSERT_VWARNER;
5f2d9966 1553 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
a3b680e6 1554 SV * const msv = vmess(pat, args);
d13b0d77 1555 STRLEN msglen;
7452cf6a 1556 const char * const message = SvPV_const(msv, msglen);
a3b680e6 1557 const I32 utf8 = SvUTF8(msv);
599cee73 1558
3aed30dc 1559 if (PL_diehook) {
63315e18 1560 assert(message);
46d9c920 1561 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
3aed30dc
HS
1562 }
1563 if (PL_in_eval) {
1564 PL_restartop = die_where(message, msglen);
ff882698 1565 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS
1566 JMPENV_JUMP(3);
1567 }
7ff03255 1568 write_to_stderr(message, msglen);
3aed30dc 1569 my_failure_exit();
599cee73
PM
1570 }
1571 else {
d13b0d77 1572 Perl_vwarn(aTHX_ pat, args);
599cee73
PM
1573 }
1574}
1575
f54ba1c2
DM
1576/* implements the ckWARN? macros */
1577
1578bool
1579Perl_ckwarn(pTHX_ U32 w)
1580{
97aff369 1581 dVAR;
f54ba1c2
DM
1582 return
1583 (
1584 isLEXWARN_on
1585 && PL_curcop->cop_warnings != pWARN_NONE
1586 && (
1587 PL_curcop->cop_warnings == pWARN_ALL
1588 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1589 || (unpackWARN2(w) &&
1590 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1591 || (unpackWARN3(w) &&
1592 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1593 || (unpackWARN4(w) &&
1594 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1595 )
1596 )
1597 ||
1598 (
1599 isLEXWARN_off && PL_dowarn & G_WARN_ON
1600 )
1601 ;
1602}
1603
1604/* implements the ckWARN?_d macro */
1605
1606bool
1607Perl_ckwarn_d(pTHX_ U32 w)
1608{
97aff369 1609 dVAR;
f54ba1c2
DM
1610 return
1611 isLEXWARN_off
1612 || PL_curcop->cop_warnings == pWARN_ALL
1613 || (
1614 PL_curcop->cop_warnings != pWARN_NONE
1615 && (
1616 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1617 || (unpackWARN2(w) &&
1618 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1619 || (unpackWARN3(w) &&
1620 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1621 || (unpackWARN4(w) &&
1622 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1623 )
1624 )
1625 ;
1626}
1627
72dc9ed5
NC
1628/* Set buffer=NULL to get a new one. */
1629STRLEN *
8ee4cf24 1630Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
72dc9ed5
NC
1631 STRLEN size) {
1632 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
35da51f7 1633 PERL_UNUSED_CONTEXT;
7918f24d 1634 PERL_ARGS_ASSERT_NEW_WARNINGS_BITFIELD;
72dc9ed5 1635
10edeb5d
JH
1636 buffer = (STRLEN*)
1637 (specialWARN(buffer) ?
1638 PerlMemShared_malloc(len_wanted) :
1639 PerlMemShared_realloc(buffer, len_wanted));
72dc9ed5
NC
1640 buffer[0] = size;
1641 Copy(bits, (buffer + 1), size, char);
1642 return buffer;
1643}
f54ba1c2 1644
e6587932
DM
1645/* since we've already done strlen() for both nam and val
1646 * we can use that info to make things faster than
1647 * sprintf(s, "%s=%s", nam, val)
1648 */
1649#define my_setenv_format(s, nam, nlen, val, vlen) \
1650 Copy(nam, s, nlen, char); \
1651 *(s+nlen) = '='; \
1652 Copy(val, s+(nlen+1), vlen, char); \
1653 *(s+(nlen+1+vlen)) = '\0'
1654
c5d12488
JH
1655#ifdef USE_ENVIRON_ARRAY
1656 /* VMS' my_setenv() is in vms.c */
1657#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1658void
e1ec3a88 1659Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1660{
27da23d5 1661 dVAR;
4efc5df6
GS
1662#ifdef USE_ITHREADS
1663 /* only parent thread can modify process environment */
1664 if (PL_curinterp == aTHX)
1665#endif
1666 {
f2517201 1667#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1668 if (!PL_use_safe_putenv) {
c5d12488
JH
1669 /* most putenv()s leak, so we manipulate environ directly */
1670 register I32 i=setenv_getix(nam); /* where does it go? */
1671 int nlen, vlen;
1672
1673 if (environ == PL_origenviron) { /* need we copy environment? */
1674 I32 j;
1675 I32 max;
1676 char **tmpenv;
1677
1678 max = i;
1679 while (environ[max])
1680 max++;
1681 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1682 for (j=0; j<max; j++) { /* copy environment */
1683 const int len = strlen(environ[j]);
1684 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1685 Copy(environ[j], tmpenv[j], len+1, char);
1686 }
1687 tmpenv[max] = NULL;
1688 environ = tmpenv; /* tell exec where it is now */
1689 }
1690 if (!val) {
1691 safesysfree(environ[i]);
1692 while (environ[i]) {
1693 environ[i] = environ[i+1];
1694 i++;
a687059c 1695 }
c5d12488
JH
1696 return;
1697 }
1698 if (!environ[i]) { /* does not exist yet */
1699 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1700 environ[i+1] = NULL; /* make sure it's null terminated */
1701 }
1702 else
1703 safesysfree(environ[i]);
1704 nlen = strlen(nam);
1705 vlen = strlen(val);
1706
1707 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1708 /* all that work just for this */
1709 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95 1710 } else {
c5d12488 1711# endif
7ee146b1 1712# if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
88f5bc07
AB
1713# if defined(HAS_UNSETENV)
1714 if (val == NULL) {
1715 (void)unsetenv(nam);
1716 } else {
1717 (void)setenv(nam, val, 1);
1718 }
1719# else /* ! HAS_UNSETENV */
1720 (void)setenv(nam, val, 1);
1721# endif /* HAS_UNSETENV */
47dafe4d 1722# else
88f5bc07
AB
1723# if defined(HAS_UNSETENV)
1724 if (val == NULL) {
1725 (void)unsetenv(nam);
1726 } else {
c4420975
AL
1727 const int nlen = strlen(nam);
1728 const int vlen = strlen(val);
1729 char * const new_env =
88f5bc07
AB
1730 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1731 my_setenv_format(new_env, nam, nlen, val, vlen);
1732 (void)putenv(new_env);
1733 }
1734# else /* ! HAS_UNSETENV */
1735 char *new_env;
c4420975
AL
1736 const int nlen = strlen(nam);
1737 int vlen;
88f5bc07
AB
1738 if (!val) {
1739 val = "";
1740 }
1741 vlen = strlen(val);
1742 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1743 /* all that work just for this */
1744 my_setenv_format(new_env, nam, nlen, val, vlen);
1745 (void)putenv(new_env);
1746# endif /* HAS_UNSETENV */
47dafe4d 1747# endif /* __CYGWIN__ */
50acdf95
MS
1748#ifndef PERL_USE_SAFE_PUTENV
1749 }
1750#endif
4efc5df6 1751 }
8d063cd8
LW
1752}
1753
c5d12488 1754#else /* WIN32 || NETWARE */
68dc0745
PP
1755
1756void
72229eff 1757Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1758{
27da23d5 1759 dVAR;
c5d12488
JH
1760 register char *envstr;
1761 const int nlen = strlen(nam);
1762 int vlen;
e6587932 1763
c5d12488
JH
1764 if (!val) {
1765 val = "";
ac5c734f 1766 }
c5d12488
JH
1767 vlen = strlen(val);
1768 Newx(envstr, nlen+vlen+2, char);
1769 my_setenv_format(envstr, nam, nlen, val, vlen);
1770 (void)PerlEnv_putenv(envstr);
1771 Safefree(envstr);
3e3baf6d
TB
1772}
1773
c5d12488 1774#endif /* WIN32 || NETWARE */
3e3baf6d 1775
c5d12488 1776#ifndef PERL_MICRO
051b305d
NC
1777static I32
1778S_setenv_getix(pTHX_ const char *nam)
3e3baf6d 1779{
c5d12488 1780 register I32 i;
0d46e09a 1781 register const I32 len = strlen(nam);
7918f24d
NC
1782
1783 PERL_ARGS_ASSERT_SETENV_GETIX;
96a5add6 1784 PERL_UNUSED_CONTEXT;
3e3baf6d
TB
1785
1786 for (i = 0; environ[i]; i++) {
1787 if (
1788#ifdef WIN32
1789 strnicmp(environ[i],nam,len) == 0
1790#else
1791 strnEQ(environ[i],nam,len)
1792#endif
1793 && environ[i][len] == '=')
1794 break; /* strnEQ must come first to avoid */
1795 } /* potential SEGV's */
1796 return i;
68dc0745 1797}
c5d12488 1798#endif /* !PERL_MICRO */
68dc0745 1799
c5d12488 1800#endif /* !VMS && !EPOC*/
378cc40b 1801
16d20bd9 1802#ifdef UNLINK_ALL_VERSIONS
79072805 1803I32
6e732051 1804Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 1805{
35da51f7 1806 I32 retries = 0;
378cc40b 1807
7918f24d
NC
1808 PERL_ARGS_ASSERT_UNLNK;
1809
35da51f7
AL
1810 while (PerlLIO_unlink(f) >= 0)
1811 retries++;
1812 return retries ? 0 : -1;
378cc40b
LW
1813}
1814#endif
1815
7a3f2258 1816/* this is a drop-in replacement for bcopy() */
2253333f 1817#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1818char *
7a3f2258 1819Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b 1820{
2d03de9c 1821 char * const retval = to;
378cc40b 1822
7918f24d
NC
1823 PERL_ARGS_ASSERT_MY_BCOPY;
1824
7c0587c8
LW
1825 if (from - to >= 0) {
1826 while (len--)
1827 *to++ = *from++;
1828 }
1829 else {
1830 to += len;
1831 from += len;
1832 while (len--)
faf8582f 1833 *(--to) = *(--from);
7c0587c8 1834 }
378cc40b
LW
1835 return retval;
1836}
ffed7fef 1837#endif
378cc40b 1838
7a3f2258 1839/* this is a drop-in replacement for memset() */
fc36a67e
PP
1840#ifndef HAS_MEMSET
1841void *
7a3f2258 1842Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1843{
2d03de9c 1844 char * const retval = loc;
fc36a67e 1845
7918f24d
NC
1846 PERL_ARGS_ASSERT_MY_MEMSET;
1847
fc36a67e
PP
1848 while (len--)
1849 *loc++ = ch;
1850 return retval;
1851}
1852#endif
1853
7a3f2258 1854/* this is a drop-in replacement for bzero() */
7c0587c8 1855#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1856char *
7a3f2258 1857Perl_my_bzero(register char *loc, register I32 len)
378cc40b 1858{
2d03de9c 1859 char * const retval = loc;
378cc40b 1860
7918f24d
NC
1861 PERL_ARGS_ASSERT_MY_BZERO;
1862
378cc40b
LW
1863 while (len--)
1864 *loc++ = 0;
1865 return retval;
1866}
1867#endif
7c0587c8 1868
7a3f2258 1869/* this is a drop-in replacement for memcmp() */
36477c24 1870#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1871I32
7a3f2258 1872Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1873{
e1ec3a88
AL
1874 register const U8 *a = (const U8 *)s1;
1875 register const U8 *b = (const U8 *)s2;
79072805 1876 register I32 tmp;
7c0587c8 1877
7918f24d
NC
1878 PERL_ARGS_ASSERT_MY_MEMCMP;
1879
7c0587c8 1880 while (len--) {
27da23d5 1881 if ((tmp = *a++ - *b++))
7c0587c8
LW
1882 return tmp;
1883 }
1884 return 0;
1885}
36477c24 1886#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1887
fe14fcc3 1888#ifndef HAS_VPRINTF
d05d9be5
AD
1889/* This vsprintf replacement should generally never get used, since
1890 vsprintf was available in both System V and BSD 2.11. (There may
1891 be some cross-compilation or embedded set-ups where it is needed,
1892 however.)
1893
1894 If you encounter a problem in this function, it's probably a symptom
1895 that Configure failed to detect your system's vprintf() function.
1896 See the section on "item vsprintf" in the INSTALL file.
1897
1898 This version may compile on systems with BSD-ish <stdio.h>,
1899 but probably won't on others.
1900*/
a687059c 1901
85e6fe83 1902#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1903char *
1904#else
1905int
1906#endif
d05d9be5 1907vsprintf(char *dest, const char *pat, void *args)
a687059c
LW
1908{
1909 FILE fakebuf;
1910
d05d9be5
AD
1911#if defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
1912 FILE_ptr(&fakebuf) = (STDCHAR *) dest;
1913 FILE_cnt(&fakebuf) = 32767;
1914#else
1915 /* These probably won't compile -- If you really need
1916 this, you'll have to figure out some other method. */
a687059c
LW
1917 fakebuf._ptr = dest;
1918 fakebuf._cnt = 32767;
d05d9be5 1919#endif
35c8bce7
LW
1920#ifndef _IOSTRG
1921#define _IOSTRG 0
1922#endif
a687059c
LW
1923 fakebuf._flag = _IOWRT|_IOSTRG;
1924 _doprnt(pat, args, &fakebuf); /* what a kludge */
d05d9be5
AD
1925#if defined(STDIO_PTR_LVALUE)
1926 *(FILE_ptr(&fakebuf)++) = '\0';
1927#else
1928 /* PerlIO has probably #defined away fputc, but we want it here. */
1929# ifdef fputc
1930# undef fputc /* XXX Should really restore it later */
1931# endif
1932 (void)fputc('\0', &fakebuf);
1933#endif
85e6fe83 1934#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1935 return(dest);
1936#else
1937 return 0; /* perl doesn't use return value */
1938#endif
1939}
1940
fe14fcc3 1941#endif /* HAS_VPRINTF */
a687059c
LW
1942
1943#ifdef MYSWAP
ffed7fef 1944#if BYTEORDER != 0x4321
a687059c 1945short
864dbfa3 1946Perl_my_swap(pTHX_ short s)
a687059c
LW
1947{
1948#if (BYTEORDER & 1) == 0
1949 short result;
1950
1951 result = ((s & 255) << 8) + ((s >> 8) & 255);
1952 return result;
1953#else
1954 return s;
1955#endif
1956}
1957
1958long
864dbfa3 1959Perl_my_htonl(pTHX_ long l)
a687059c
LW
1960{
1961 union {
1962 long result;
ffed7fef 1963 char c[sizeof(long)];
a687059c
LW
1964 } u;
1965
cef6ea9d
JH
1966#if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
1967#if BYTEORDER == 0x12345678
1968 u.result = 0;
1969#endif
a687059c
LW
1970 u.c[0] = (l >> 24) & 255;
1971 u.c[1] = (l >> 16) & 255;
1972 u.c[2] = (l >> 8) & 255;
1973 u.c[3] = l & 255;
1974 return u.result;
1975#else
ffed7fef 1976#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1977 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1978#else
79072805
LW
1979 register I32 o;
1980 register I32 s;
a687059c 1981
ffed7fef
LW
1982 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1983 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW
1984 }
1985 return u.result;
1986#endif
1987#endif
1988}
1989
1990long
864dbfa3 1991Perl_my_ntohl(pTHX_ long l)
a687059c
LW
1992{
1993 union {
1994 long l;
ffed7fef 1995 char c[sizeof(long)];
a687059c
LW
1996 } u;
1997
ffed7fef 1998#if BYTEORDER == 0x1234
a687059c
LW
1999 u.c[0] = (l >> 24) & 255;
2000 u.c[1] = (l >> 16) & 255;
2001 u.c[2] = (l >> 8) & 255;
2002 u.c[3] = l & 255;
2003 return u.l;
2004#else
ffed7fef 2005#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 2006 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 2007#else
79072805
LW
2008 register I32 o;
2009 register I32 s;
a687059c
LW
2010
2011 u.l = l;
2012 l = 0;
ffed7fef
LW
2013 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
2014 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW
2015 }
2016 return l;
2017#endif
2018#endif
2019}
2020
ffed7fef 2021#endif /* BYTEORDER != 0x4321 */
988174c1
LW
2022#endif /* MYSWAP */
2023
2024/*
2025 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
2026 * If these functions are defined,
2027 * the BYTEORDER is neither 0x1234 nor 0x4321.
2028 * However, this is not assumed.
2029 * -DWS
2030 */
2031
1109a392 2032#define HTOLE(name,type) \
988174c1 2033 type \
ba106d47 2034 name (register type n) \
988174c1
LW
2035 { \
2036 union { \
2037 type value; \
2038 char c[sizeof(type)]; \
2039 } u; \
bb7a0f54
MHM
2040 register U32 i; \
2041 register U32 s = 0; \
1109a392 2042 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW
2043 u.c[i] = (n >> s) & 0xFF; \
2044 } \
2045 return u.value; \
2046 }
2047
1109a392 2048#define LETOH(name,type) \
988174c1 2049 type \
ba106d47 2050 name (register type n) \
988174c1
LW
2051 { \
2052 union { \
2053 type value; \
2054 char c[sizeof(type)]; \
2055 } u; \
bb7a0f54
MHM
2056 register U32 i; \
2057 register U32 s = 0; \
988174c1
LW
2058 u.value = n; \
2059 n = 0; \
1109a392
MHM
2060 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
2061 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW
2062 } \
2063 return n; \
2064 }
2065
1109a392
MHM
2066/*
2067 * Big-endian byte order functions.
2068 */
2069
2070#define HTOBE(name,type) \
2071 type \
2072 name (register type n) \
2073 { \
2074 union { \
2075 type value; \
2076 char c[sizeof(type)]; \
2077 } u; \
bb7a0f54
MHM
2078 register U32 i; \
2079 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM
2080 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2081 u.c[i] = (n >> s) & 0xFF; \
2082 } \
2083 return u.value; \
2084 }
2085
2086#define BETOH(name,type) \
2087 type \
2088 name (register type n) \
2089 { \
2090 union { \
2091 type value; \
2092 char c[sizeof(type)]; \
2093 } u; \
bb7a0f54
MHM
2094 register U32 i; \
2095 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM
2096 u.value = n; \
2097 n = 0; \
2098 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2099 n |= ((type)(u.c[i] & 0xFF)) << s; \
2100 } \
2101 return n; \
2102 }
2103
2104/*
2105 * If we just can't do it...
2106 */
2107
2108#define NOT_AVAIL(name,type) \
2109 type \
2110 name (register type n) \
2111 { \
2112 Perl_croak_nocontext(#name "() not available"); \
2113 return n; /* not reached */ \
2114 }
2115
2116
988174c1 2117#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 2118HTOLE(htovs,short)
988174c1
LW
2119#endif
2120#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 2121HTOLE(htovl,long)
988174c1
LW
2122#endif
2123#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 2124LETOH(vtohs,short)
988174c1
LW
2125#endif
2126#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM
2127LETOH(vtohl,long)
2128#endif
2129
2130#ifdef PERL_NEED_MY_HTOLE16
2131# if U16SIZE == 2
2132HTOLE(Perl_my_htole16,U16)
2133# else
2134NOT_AVAIL(Perl_my_htole16,U16)
2135# endif
2136#endif
2137#ifdef PERL_NEED_MY_LETOH16
2138# if U16SIZE == 2
2139LETOH(Perl_my_letoh16,U16)
2140# else
2141NOT_AVAIL(Perl_my_letoh16,U16)
2142# endif
2143#endif
2144#ifdef PERL_NEED_MY_HTOBE16
2145# if U16SIZE == 2
2146HTOBE(Perl_my_htobe16,U16)
2147# else
2148NOT_AVAIL(Perl_my_htobe16,U16)
2149# endif
2150#endif
2151#ifdef PERL_NEED_MY_BETOH16
2152# if U16SIZE == 2
2153BETOH(Perl_my_betoh16,U16)
2154# else
2155NOT_AVAIL(Perl_my_betoh16,U16)
2156# endif
2157#endif
2158
2159#ifdef PERL_NEED_MY_HTOLE32
2160# if U32SIZE == 4
2161HTOLE(Perl_my_htole32,U32)
2162# else
2163NOT_AVAIL(Perl_my_htole32,U32)
2164# endif
2165#endif
2166#ifdef PERL_NEED_MY_LETOH32
2167# if U32SIZE == 4
2168LETOH(Perl_my_letoh32,U32)
2169# else
2170NOT_AVAIL(Perl_my_letoh32,U32)
2171# endif
2172#endif
2173#ifdef PERL_NEED_MY_HTOBE32
2174# if U32SIZE == 4
2175HTOBE(Perl_my_htobe32,U32)
2176# else
2177NOT_AVAIL(Perl_my_htobe32,U32)
2178# endif
2179#endif
2180#ifdef PERL_NEED_MY_BETOH32
2181# if U32SIZE == 4
2182BETOH(Perl_my_betoh32,U32)
2183# else
2184NOT_AVAIL(Perl_my_betoh32,U32)
2185# endif
2186#endif
2187
2188#ifdef PERL_NEED_MY_HTOLE64
2189# if U64SIZE == 8
2190HTOLE(Perl_my_htole64,U64)
2191# else
2192NOT_AVAIL(Perl_my_htole64,U64)
2193# endif
2194#endif
2195#ifdef PERL_NEED_MY_LETOH64
2196# if U64SIZE == 8
2197LETOH(Perl_my_letoh64,U64)
2198# else
2199NOT_AVAIL(Perl_my_letoh64,U64)
2200# endif
2201#endif
2202#ifdef PERL_NEED_MY_HTOBE64
2203# if U64SIZE == 8
2204HTOBE(Perl_my_htobe64,U64)
2205# else
2206NOT_AVAIL(Perl_my_htobe64,U64)
2207# endif
2208#endif
2209#ifdef PERL_NEED_MY_BETOH64
2210# if U64SIZE == 8
2211BETOH(Perl_my_betoh64,U64)
2212# else
2213NOT_AVAIL(Perl_my_betoh64,U64)
2214# endif
988174c1 2215#endif
a687059c 2216
1109a392
MHM
2217#ifdef PERL_NEED_MY_HTOLES
2218HTOLE(Perl_my_htoles,short)
2219#endif
2220#ifdef PERL_NEED_MY_LETOHS
2221LETOH(Perl_my_letohs,short)
2222#endif
2223#ifdef PERL_NEED_MY_HTOBES
2224HTOBE(Perl_my_htobes,short)
2225#endif
2226#ifdef PERL_NEED_MY_BETOHS
2227BETOH(Perl_my_betohs,short)
2228#endif
2229
2230#ifdef PERL_NEED_MY_HTOLEI
2231HTOLE(Perl_my_htolei,int)
2232#endif
2233#ifdef PERL_NEED_MY_LETOHI
2234LETOH(Perl_my_letohi,int)
2235#endif
2236#ifdef PERL_NEED_MY_HTOBEI
2237HTOBE(Perl_my_htobei,int)
2238#endif
2239#ifdef PERL_NEED_MY_BETOHI
2240BETOH(Perl_my_betohi,int)
2241#endif
2242
2243#ifdef PERL_NEED_MY_HTOLEL
2244HTOLE(Perl_my_htolel,long)
2245#endif
2246#ifdef PERL_NEED_MY_LETOHL
2247LETOH(Perl_my_letohl,long)
2248#endif
2249#ifdef PERL_NEED_MY_HTOBEL
2250HTOBE(Perl_my_htobel,long)
2251#endif
2252#ifdef PERL_NEED_MY_BETOHL
2253BETOH(Perl_my_betohl,long)
2254#endif
2255
2256void
2257Perl_my_swabn(void *ptr, int n)
2258{
2259 register char *s = (char *)ptr;
2260 register char *e = s + (n-1);
2261 register char tc;
2262
7918f24d
NC
2263 PERL_ARGS_ASSERT_MY_SWABN;
2264
1109a392
MHM
2265 for (n /= 2; n > 0; s++, e--, n--) {
2266 tc = *s;
2267 *s = *e;
2268 *e = tc;
2269 }
2270}
2271
4a7d1889 2272PerlIO *
c9289b7b 2273Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args)
4a7d1889 2274{
9c12f1e5 2275#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 2276 dVAR;
1f852d0d
NIS
2277 int p[2];
2278 register I32 This, that;
2279 register Pid_t pid;
2280 SV *sv;
2281 I32 did_pipes = 0;
2282 int pp[2];
2283
7918f24d
NC
2284 PERL_ARGS_ASSERT_MY_POPEN_LIST;
2285
1f852d0d
NIS
2286 PERL_FLUSHALL_FOR_CHILD;
2287 This = (*mode == 'w');
2288 that = !This;
2289 if (PL_tainting) {
2290 taint_env();
2291 taint_proper("Insecure %s%s", "EXEC");
2292 }
2293 if (PerlProc_pipe(p) < 0)
4608196e 2294 return NULL;
1f852d0d
NIS
2295 /* Try for another pipe pair for error return */
2296 if (PerlProc_pipe(pp) >= 0)
2297 did_pipes = 1;
52e18b1f 2298 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS
2299 if (errno != EAGAIN) {
2300 PerlLIO_close(p[This]);
4e6dfe71 2301 PerlLIO_close(p[that]);
1f852d0d
NIS
2302 if (did_pipes) {
2303 PerlLIO_close(pp[0]);
2304 PerlLIO_close(pp[1]);
2305 }
4608196e 2306 return NULL;
1f852d0d
NIS
2307 }
2308 sleep(5);
2309 }
2310 if (pid == 0) {
2311 /* Child */
1f852d0d
NIS
2312#undef THIS
2313#undef THAT
2314#define THIS that
2315#define THAT This
1f852d0d
NIS
2316 /* Close parent's end of error status pipe (if any) */
2317 if (did_pipes) {
2318 PerlLIO_close(pp[0]);
2319#if defined(HAS_FCNTL) && defined(F_SETFD)
2320 /* Close error pipe automatically if exec works */
2321 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2322#endif
2323 }
2324 /* Now dup our end of _the_ pipe to right position */
2325 if (p[THIS] != (*mode == 'r')) {
2326 PerlLIO_dup2(p[THIS], *mode == 'r');
2327 PerlLIO_close(p[THIS]);
4e6dfe71
GS
2328 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2329 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2330 }
4e6dfe71
GS
2331 else
2332 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS
2333#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2334 /* No automatic close - do it by hand */
b7953727
JH
2335# ifndef NOFILE
2336# define NOFILE 20
2337# endif
a080fe3d
NIS
2338 {
2339 int fd;
2340
2341 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2342 if (fd != pp[1])
a080fe3d
NIS
2343 PerlLIO_close(fd);
2344 }
1f852d0d
NIS
2345 }
2346#endif
a0714e2c 2347 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
1f852d0d
NIS
2348 PerlProc__exit(1);
2349#undef THIS
2350#undef THAT
2351 }
2352 /* Parent */
52e18b1f 2353 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS
2354 if (did_pipes)
2355 PerlLIO_close(pp[1]);
2356 /* Keep the lower of the two fd numbers */
2357 if (p[that] < p[This]) {
2358 PerlLIO_dup2(p[This], p[that]);
2359 PerlLIO_close(p[This]);
2360 p[This] = p[that];
2361 }
4e6dfe71
GS
2362 else
2363 PerlLIO_close(p[that]); /* close child's end of pipe */
2364
1f852d0d
NIS
2365 LOCK_FDPID_MUTEX;
2366 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2367 UNLOCK_FDPID_MUTEX;
862a34c6 2368 SvUPGRADE(sv,SVt_IV);
45977657 2369 SvIV_set(sv, pid);
1f852d0d
NIS
2370 PL_forkprocess = pid;
2371 /* If we managed to get status pipe check for exec fail */
2372 if (did_pipes && pid > 0) {
2373 int errkid;
bb7a0f54
MHM
2374 unsigned n = 0;
2375 SSize_t n1;
1f852d0d
NIS
2376
2377 while (n < sizeof(int)) {
2378 n1 = PerlLIO_read(pp[0],
2379 (void*)(((char*)&errkid)+n),
2380 (sizeof(int)) - n);
2381 if (n1 <= 0)
2382 break;
2383 n += n1;
2384 }
2385 PerlLIO_close(pp[0]);
2386 did_pipes = 0;
2387 if (n) { /* Error */
2388 int pid2, status;
8c51524e 2389 PerlLIO_close(p[This]);
1f852d0d
NIS
2390 if (n != sizeof(int))
2391 Perl_croak(aTHX_ "panic: kid popen errno read");
2392 do {
2393 pid2 = wait4pid(pid, &status, 0);
2394 } while (pid2 == -1 && errno == EINTR);
2395 errno = errkid; /* Propagate errno from kid */
4608196e 2396 return NULL;
1f852d0d
NIS
2397 }
2398 }
2399 if (did_pipes)
2400 PerlLIO_close(pp[0]);
2401 return PerlIO_fdopen(p[This], mode);
2402#else
9d419b5f 2403# ifdef OS2 /* Same, without fork()ing and all extra overhead... */
4e205ed6 2404 return my_syspopen4(aTHX_ NULL, mode, n, args);
9d419b5f 2405# else
4a7d1889
NIS
2406 Perl_croak(aTHX_ "List form of piped open not implemented");
2407 return (PerlIO *) NULL;
9d419b5f 2408# endif
1f852d0d 2409#endif
4a7d1889
NIS
2410}
2411
5f05dabc 2412 /* VMS' my_popen() is in VMS.c, same with OS/2. */
9c12f1e5 2413#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
760ac839 2414PerlIO *
3dd43144 2415Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c 2416{
97aff369 2417 dVAR;
a687059c 2418 int p[2];
8ac85365 2419 register I32 This, that;
d8a83dd3 2420 register Pid_t pid;
79072805 2421 SV *sv;
bfce84ec 2422 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ
2423 I32 did_pipes = 0;
2424 int pp[2];
a687059c 2425
7918f24d
NC
2426 PERL_ARGS_ASSERT_MY_POPEN;
2427
45bc9206 2428 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ
2429#ifdef OS2
2430 if (doexec) {
23da6c43 2431 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2432 }
a1d180c4 2433#endif
8ac85365
NIS
2434 This = (*mode == 'w');
2435 that = !This;
3280af22 2436 if (doexec && PL_tainting) {
bbce6d69
PP
2437 taint_env();
2438 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2439 }
c2267164 2440 if (PerlProc_pipe(p) < 0)
4608196e 2441 return NULL;
e446cec8
IZ
2442 if (doexec && PerlProc_pipe(pp) >= 0)
2443 did_pipes = 1;
52e18b1f 2444 while ((pid = PerlProc_fork()) < 0) {
a687059c 2445 if (errno != EAGAIN) {
6ad3d225 2446 PerlLIO_close(p[This]);
b5ac89c3 2447 PerlLIO_close(p[that]);
e446cec8
IZ
2448 if (did_pipes) {
2449 PerlLIO_close(pp[0]);
2450 PerlLIO_close(pp[1]);
2451 }
a687059c 2452 if (!doexec)
cea2e8a9 2453 Perl_croak(aTHX_ "Can't fork");
4608196e 2454 return NULL;
a687059c
LW
2455 }
2456 sleep(5);
2457 }
2458 if (pid == 0) {
79072805
LW
2459 GV* tmpgv;
2460
30ac6d9b
GS
2461#undef THIS
2462#undef THAT
a687059c 2463#define THIS that
8ac85365 2464#define THAT This
e446cec8
IZ
2465 if (did_pipes) {
2466 PerlLIO_close(pp[0]);
2467#if defined(HAS_FCNTL) && defined(F_SETFD)
2468 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2469#endif
2470 }
a687059c 2471 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS
2472 PerlLIO_dup2(p[THIS], *mode == 'r');
2473 PerlLIO_close(p[THIS]);
b5ac89c3
NIS
2474 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2475 PerlLIO_close(p[THAT]);
a687059c 2476 }
b5ac89c3
NIS
2477 else
2478 PerlLIO_close(p[THAT]);
4435c477 2479#ifndef OS2
a687059c 2480 if (doexec) {
a0d0e21e 2481#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW
2482#ifndef NOFILE
2483#define NOFILE 20
2484#endif
a080fe3d 2485 {
3aed30dc 2486 int fd;
a080fe3d
NIS
2487
2488 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2489 if (fd != pp[1])
3aed30dc 2490 PerlLIO_close(fd);
a080fe3d 2491 }
ae986130 2492#endif
a080fe3d
NIS
2493 /* may or may not use the shell */
2494 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2495 PerlProc__exit(1);
a687059c 2496 }
4435c477 2497#endif /* defined OS2 */
713cef20
IZ
2498
2499#ifdef PERLIO_USING_CRLF
2500 /* Since we circumvent IO layers when we manipulate low-level
2501 filedescriptors directly, need to manually switch to the
2502 default, binary, low-level mode; see PerlIOBuf_open(). */
2503 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2504#endif
2505
fafc274c 2506 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4d76a344 2507 SvREADONLY_off(GvSV(tmpgv));
7766f137 2508 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS
2509 SvREADONLY_on(GvSV(tmpgv));
2510 }
2511#ifdef THREADS_HAVE_PIDS
2512 PL_ppid = (IV)getppid();
2513#endif
3280af22 2514 PL_forkprocess = 0;
ca0c25f6 2515#ifdef PERL_USES_PL_PIDSTATUS
3280af22 2516 hv_clear(PL_pidstatus); /* we have no children */
ca0c25f6 2517#endif
4608196e 2518 return NULL;
a687059c
LW
2519#undef THIS
2520#undef THAT
2521 }
b5ac89c3 2522 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ
2523 if (did_pipes)
2524 PerlLIO_close(pp[1]);
8ac85365 2525 if (p[that] < p[This]) {
6ad3d225
GS
2526 PerlLIO_dup2(p[This], p[that]);
2527 PerlLIO_close(p[This]);
8ac85365 2528 p[This] = p[that];
62b28dd9 2529 }
b5ac89c3
NIS
2530 else
2531 PerlLIO_close(p[that]);
2532
4755096e 2533 LOCK_FDPID_MUTEX;
3280af22 2534 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2535 UNLOCK_FDPID_MUTEX;
862a34c6 2536 SvUPGRADE(sv,SVt_IV);
45977657 2537 SvIV_set(sv, pid);
3280af22 2538 PL_forkprocess = pid;
e446cec8
IZ
2539 if (did_pipes && pid > 0) {
2540 int errkid;
bb7a0f54
MHM
2541 unsigned n = 0;
2542 SSize_t n1;
e446cec8
IZ
2543
2544 while (n < sizeof(int)) {
2545 n1 = PerlLIO_read(pp[0],
2546 (void*)(((char*)&errkid)+n),
2547 (sizeof(int)) - n);
2548 if (n1 <= 0)
2549 break;
2550 n += n1;
2551 }
2f96c702
IZ
2552 PerlLIO_close(pp[0]);
2553 did_pipes = 0;
e446cec8 2554 if (n) { /* Error */
faa466a7 2555 int pid2, status;
8c51524e 2556 PerlLIO_close(p[This]);
e446cec8 2557 if (n != sizeof(int))
cea2e8a9 2558 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG
2559 do {
2560 pid2 = wait4pid(pid, &status, 0);
2561 } while (pid2 == -1 && errno == EINTR);
e446cec8 2562 errno = errkid; /* Propagate errno from kid */
4608196e 2563 return NULL;
e446cec8
IZ
2564 }
2565 }
2566 if (did_pipes)
2567 PerlLIO_close(pp[0]);
8ac85365 2568 return PerlIO_fdopen(p[This], mode);
a687059c 2569}
7c0587c8 2570#else
85ca448a 2571#if defined(atarist) || defined(EPOC)
7c0587c8 2572FILE *popen();
760ac839 2573PerlIO *
cef6ea9d 2574Perl_my_popen(pTHX_ const char *cmd, const char *mode)
7c0587c8 2575{
7918f24d 2576 PERL_ARGS_ASSERT_MY_POPEN;
45bc9206 2577 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS
2578 /* Call system's popen() to get a FILE *, then import it.
2579 used 0 for 2nd parameter to PerlIO_importFILE;
2580 apparently not used
2581 */
2582 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2583}
2b96b0a5
JH
2584#else
2585#if defined(DJGPP)
2586FILE *djgpp_popen();
2587PerlIO *
cef6ea9d 2588Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2b96b0a5
JH
2589{
2590 PERL_FLUSHALL_FOR_CHILD;
2591 /* Call system's popen() to get a FILE *, then import it.
2592 used 0 for 2nd parameter to PerlIO_importFILE;
2593 apparently not used
2594 */
2595 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2596}
9c12f1e5
RGS
2597#else
2598#if defined(__LIBCATAMOUNT__)
2599PerlIO *
2600Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2601{
2602 return NULL;
2603}
2604#endif
2b96b0a5 2605#endif
7c0587c8
LW
2606#endif
2607
2608#endif /* !DOSISH */
a687059c 2609
52e18b1f
GS
2610/* this is called in parent before the fork() */
2611void
2612Perl_atfork_lock(void)
2613{
27da23d5 2614 dVAR;
3db8f154 2615#if defined(USE_ITHREADS)
52e18b1f
GS
2616 /* locks must be held in locking order (if any) */
2617# ifdef MYMALLOC
2618 MUTEX_LOCK(&PL_malloc_mutex);
2619# endif
2620 OP_REFCNT_LOCK;
2621#endif
2622}
2623
2624/* this is called in both parent and child after the fork() */
2625void
2626Perl_atfork_unlock(void)
2627{
27da23d5 2628 dVAR;
3db8f154 2629#if defined(USE_ITHREADS)
52e18b1f
GS
2630 /* locks must be released in same order as in atfork_lock() */
2631# ifdef MYMALLOC
2632 MUTEX_UNLOCK(&PL_malloc_mutex);
2633# endif
2634 OP_REFCNT_UNLOCK;
2635#endif
2636}
2637
2638Pid_t
2639Perl_my_fork(void)
2640{
2641#if defined(HAS_FORK)
2642 Pid_t pid;
3db8f154 2643#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS
2644 atfork_lock();
2645 pid = fork();
2646 atfork_unlock();
2647#else
2648 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2649 * handlers elsewhere in the code */
2650 pid = fork();
2651#endif
2652 return pid;
2653#else
2654 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2655 Perl_croak_nocontext("fork() not available");
b961a566 2656 return 0;
52e18b1f
GS
2657#endif /* HAS_FORK */
2658}
2659
748a9306 2660#ifdef DUMP_FDS
35ff7856 2661void
c9289b7b 2662Perl_dump_fds(pTHX_ const char *const s)
ae986130
LW
2663{
2664 int fd;
c623ac67 2665 Stat_t tmpstatbuf;
ae986130 2666
7918f24d
NC
2667 PERL_ARGS_ASSERT_DUMP_FDS;
2668
bf49b057 2669 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2670 for (fd = 0; fd < 32; fd++) {
6ad3d225 2671 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2672 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2673 }
bf49b057 2674 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2675 return;
ae986130 2676}
35ff7856 2677#endif /* DUMP_FDS */
ae986130 2678
fe14fcc3 2679#ifndef HAS_DUP2
fec02dd3 2680int
ba106d47 2681dup2(int oldfd, int newfd)
a687059c 2682{
a0d0e21e 2683#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD
2684 if (oldfd == newfd)
2685 return oldfd;
6ad3d225 2686 PerlLIO_close(newfd);
fec02dd3 2687 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2688#else
fc36a67e
PP
2689#define DUP2_MAX_FDS 256
2690 int fdtmp[DUP2_MAX_FDS];
79072805 2691 I32 fdx = 0;
ae986130
LW
2692 int fd;
2693
fe14fcc3 2694 if (oldfd == newfd)
fec02dd3 2695 return oldfd;
6ad3d225 2696 PerlLIO_close(newfd);
fc36a67e 2697 /* good enough for low fd's... */
6ad3d225 2698 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2699 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2700 PerlLIO_close(fd);
fc36a67e
PP
2701 fd = -1;
2702 break;
2703 }
ae986130 2704 fdtmp[fdx++] = fd;
fc36a67e 2705 }
ae986130 2706 while (fdx > 0)
6ad3d225 2707 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2708 return fd;
62b28dd9 2709#endif
a687059c
LW
2710}
2711#endif
2712
64ca3a65 2713#ifndef PERL_MICRO
ff68c719
PP
2714#ifdef HAS_SIGACTION
2715
abea2c45
HS
2716#ifdef MACOS_TRADITIONAL
2717/* We don't want restart behavior on MacOS */
2718#undef SA_RESTART
2719#endif
2720
ff68c719 2721Sighandler_t
864dbfa3 2722Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2723{
27da23d5 2724 dVAR;
ff68c719
PP
2725 struct sigaction act, oact;
2726
a10b1e10
JH
2727#ifdef USE_ITHREADS
2728 /* only "parent" interpreter can diddle signals */
2729 if (PL_curinterp != aTHX)
8aad04aa 2730 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2731#endif
2732
8aad04aa 2733 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2734 sigemptyset(&act.sa_mask);
2735 act.sa_flags = 0;
2736#ifdef SA_RESTART
4ffa73a3
JH
2737 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2738 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2739#endif
358837b8 2740#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2741 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2742 act.sa_flags |= SA_NOCLDWAIT;
2743#endif
ff68c719 2744 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2745 return (Sighandler_t) SIG_ERR;
ff68c719 2746 else
8aad04aa 2747 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2748}
2749
2750Sighandler_t
864dbfa3 2751Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP
2752{
2753 struct sigaction oact;
96a5add6 2754 PERL_UNUSED_CONTEXT;
ff68c719
PP
2755
2756 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2757 return (Sighandler_t) SIG_ERR;
ff68c719 2758 else
8aad04aa 2759 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2760}
2761
2762int
864dbfa3 2763Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2764{
27da23d5 2765 dVAR;
ff68c719
PP
2766 struct sigaction act;
2767
7918f24d
NC
2768 PERL_ARGS_ASSERT_RSIGNAL_SAVE;
2769
a10b1e10
JH
2770#ifdef USE_ITHREADS
2771 /* only "parent" interpreter can diddle signals */
2772 if (PL_curinterp != aTHX)
2773 return -1;
2774#endif
2775
8aad04aa 2776 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2777 sigemptyset(&act.sa_mask);
2778 act.sa_flags = 0;
2779#ifdef SA_RESTART
4ffa73a3
JH
2780 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2781 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2782#endif
36b5d377 2783#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2784 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2785 act.sa_flags |= SA_NOCLDWAIT;
2786#endif
ff68c719
PP
2787 return sigaction(signo, &act, save);
2788}
2789
2790int
864dbfa3 2791Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2792{
27da23d5 2793 dVAR;
a10b1e10
JH
2794#ifdef USE_ITHREADS
2795 /* only "parent" interpreter can diddle signals */
2796 if (PL_curinterp != aTHX)
2797 return -1;
2798#endif
2799
ff68c719
PP
2800 return sigaction(signo, save, (struct sigaction *)NULL);
2801}
2802
2803#else /* !HAS_SIGACTION */
2804
2805Sighandler_t
864dbfa3 2806Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2807{
39f1703b 2808#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2809 /* only "parent" interpreter can diddle signals */
2810 if (PL_curinterp != aTHX)
8aad04aa 2811 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2812#endif
2813
6ad3d225 2814 return PerlProc_signal(signo, handler);
ff68c719
PP
2815}
2816
fabdb6c0 2817static Signal_t
4e35701f 2818sig_trap(int signo)
ff68c719 2819{
27da23d5
JH
2820 dVAR;
2821 PL_sig_trapped++;
ff68c719
PP
2822}
2823
2824Sighandler_t
864dbfa3 2825Perl_rsignal_state(pTHX_ int signo)
ff68c719 2826{
27da23d5 2827 dVAR;
ff68c719
PP
2828 Sighandler_t oldsig;
2829
39f1703b 2830#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2831 /* only "parent" interpreter can diddle signals */
2832 if (PL_curinterp != aTHX)
8aad04aa 2833 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2834#endif
2835
27da23d5 2836 PL_sig_trapped = 0;
6ad3d225
GS
2837 oldsig = PerlProc_signal(signo, sig_trap);
2838 PerlProc_signal(signo, oldsig);
27da23d5 2839 if (PL_sig_trapped)
3aed30dc 2840 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719
PP
2841 return oldsig;
2842}
2843
2844int
864dbfa3 2845Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2846{
39f1703b 2847#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2848 /* only "parent" interpreter can diddle signals */
2849 if (PL_curinterp != aTHX)
2850 return -1;
2851#endif
6ad3d225 2852 *save = PerlProc_signal(signo, handler);
8aad04aa 2853 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2854}
2855
2856int
864dbfa3 2857Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2858{
39f1703b 2859#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2860 /* only "parent" interpreter can diddle signals */
2861 if (PL_curinterp != aTHX)
2862 return -1;
2863#endif
8aad04aa 2864 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2865}
2866
2867#endif /* !HAS_SIGACTION */
64ca3a65 2868#endif /* !PERL_MICRO */
ff68c719 2869
5f05dabc 2870 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
9c12f1e5 2871#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
79072805 2872I32
864dbfa3 2873Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2874{
97aff369 2875 dVAR;
ff68c719 2876 Sigsave_t hstat, istat, qstat;
a687059c 2877 int status;
a0d0e21e 2878 SV **svp;
d8a83dd3
JH
2879 Pid_t pid;
2880 Pid_t pid2;
03136e13 2881 bool close_failed;
b7953727 2882 int saved_errno = 0;
22fae026
TM
2883#ifdef WIN32
2884 int saved_win32_errno;
2885#endif
a687059c 2886
4755096e 2887 LOCK_FDPID_MUTEX;
3280af22 2888 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2889 UNLOCK_FDPID_MUTEX;
25d92023 2890 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2891 SvREFCNT_dec(*svp);
3280af22 2892 *svp = &PL_sv_undef;
ddcf38b7
IZ
2893#ifdef OS2
2894 if (pid == -1) { /* Opened by popen. */
2895 return my_syspclose(ptr);
2896 }
a1d180c4 2897#endif
03136e13
CS
2898 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2899 saved_errno = errno;
22fae026
TM
2900#ifdef WIN32
2901 saved_win32_errno = GetLastError();
2902#endif
03136e13 2903 }
7c0587c8 2904#ifdef UTS
6ad3d225 2905 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2906#endif
64ca3a65 2907#ifndef PERL_MICRO
8aad04aa
JH
2908 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2909 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2910 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
64ca3a65 2911#endif
748a9306 2912 do {
1d3434b8
GS
2913 pid2 = wait4pid(pid, &status, 0);
2914 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2915#ifndef PERL_MICRO
ff68c719
PP
2916 rsignal_restore(SIGHUP, &hstat);
2917 rsignal_restore(SIGINT, &istat);
2918 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2919#endif
03136e13 2920 if (close_failed) {
ce6e1103 2921 SETERRNO(saved_errno, 0);
03136e13
CS
2922 return -1;
2923 }
1d3434b8 2924 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2925}
9c12f1e5
RGS
2926#else
2927#if defined(__LIBCATAMOUNT__)
2928I32
2929Perl_my_pclose(pTHX_ PerlIO *ptr)
2930{
2931 return -1;
2932}
2933#endif
4633a7c4
LW
2934#endif /* !DOSISH */
2935
9c12f1e5 2936#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
79072805 2937I32
d8a83dd3 2938Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2939{
97aff369 2940 dVAR;
27da23d5 2941 I32 result = 0;
7918f24d 2942 PERL_ARGS_ASSERT_WAIT4PID;
b7953727
JH
2943 if (!pid)
2944 return -1;
ca0c25f6 2945#ifdef PERL_USES_PL_PIDSTATUS
b7953727 2946 {
3aed30dc 2947 if (pid > 0) {
12072db5
NC
2948 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2949 pid, rather than a string form. */
c4420975 2950 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
3aed30dc
HS
2951 if (svp && *svp != &PL_sv_undef) {
2952 *statusp = SvIVX(*svp);
12072db5
NC
2953 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2954 G_DISCARD);
3aed30dc
HS
2955 return pid;
2956 }
2957 }
2958 else {
2959 HE *entry;
2960
2961 hv_iterinit(PL_pidstatus);
2962 if ((entry = hv_iternext(PL_pidstatus))) {
c4420975 2963 SV * const sv = hv_iterval(PL_pidstatus,entry);
7ea75b61 2964 I32 len;
0bcc34c2 2965 const char * const spid = hv_iterkey(entry,&len);
27da23d5 2966
12072db5
NC
2967 assert (len == sizeof(Pid_t));
2968 memcpy((char *)&pid, spid, len);
3aed30dc 2969 *statusp = SvIVX(sv);
7b9a3241
NC
2970 /* The hash iterator is currently on this entry, so simply
2971 calling hv_delete would trigger the lazy delete, which on
2972 aggregate does more work, beacuse next call to hv_iterinit()
2973 would spot the flag, and have to call the delete routine,
2974 while in the meantime any new entries can't re-use that
2975 memory. */
2976 hv_iterinit(PL_pidstatus);
7ea75b61 2977 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
3aed30dc
HS
2978 return pid;
2979 }
20188a90
LW
2980 }
2981 }
68a29c53 2982#endif
79072805 2983#ifdef HAS_WAITPID
367f3c24
IZ
2984# ifdef HAS_WAITPID_RUNTIME
2985 if (!HAS_WAITPID_RUNTIME)
2986 goto hard_way;
2987# endif
cddd4526 2988 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2989 goto finish;
367f3c24
IZ
2990#endif
2991#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
4608196e 2992 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
dfcfdb64 2993 goto finish;
367f3c24 2994#endif
ca0c25f6 2995#ifdef PERL_USES_PL_PIDSTATUS
27da23d5 2996#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2997 hard_way:
27da23d5 2998#endif
a0d0e21e 2999 {
a0d0e21e 3000 if (flags)
cea2e8a9 3001 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 3002 else {
76e3520e 3003 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW
3004 pidgone(result,*statusp);
3005 if (result < 0)
3006 *statusp = -1;
3007 }
a687059c
LW
3008 }
3009#endif
27da23d5 3010#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 3011 finish:
27da23d5 3012#endif
cddd4526
NIS
3013 if (result < 0 && errno == EINTR) {
3014 PERL_ASYNC_CHECK();
48dbb59e 3015 errno = EINTR; /* reset in case a signal handler changed $! */
cddd4526
NIS
3016 }
3017 return result;
a687059c 3018}
2986a63f 3019#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 3020
ca0c25f6 3021#ifdef PERL_USES_PL_PIDSTATUS
7c0587c8 3022void
ed4173ef 3023S_pidgone(pTHX_ Pid_t pid, int status)
a687059c 3024{
79072805 3025 register SV *sv;
a687059c 3026
12072db5 3027 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
862a34c6 3028 SvUPGRADE(sv,SVt_IV);
45977657 3029 SvIV_set(sv, status);
20188a90 3030 return;
a687059c 3031}
ca0c25f6 3032#endif
a687059c 3033
85ca448a 3034#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 3035int pclose();
ddcf38b7
IZ
3036#ifdef HAS_FORK
3037int /* Cannot prototype with I32
3038 in os2ish.h. */
ba106d47 3039my_syspclose(PerlIO *ptr)
ddcf38b7 3040#else
79072805 3041I32
864dbfa3 3042Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 3043#endif
a687059c 3044{
760ac839 3045 /* Needs work for PerlIO ! */
c4420975 3046 FILE * const f = PerlIO_findFILE(ptr);
7452cf6a 3047 const I32 result = pclose(f);
2b96b0a5
JH
3048 PerlIO_releaseFILE(ptr,f);
3049 return result;
3050}
3051#endif
3052
933fea7f 3053#if defined(DJGPP)
2b96b0a5
JH
3054int djgpp_pclose();
3055I32
3056Perl_my_pclose(pTHX_ PerlIO *ptr)
3057{
3058 /* Needs work for PerlIO ! */
c4420975 3059 FILE * const f = PerlIO_findFILE(ptr);
2b96b0a5 3060 I32 result = djgpp_pclose(f);
933fea7f 3061 result = (result << 8) & 0xff00;
760ac839
LW
3062 PerlIO_releaseFILE(ptr,f);
3063 return result;
a687059c 3064}
7c0587c8 3065#endif
9f68db38
LW
3066
3067void
864dbfa3 3068Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 3069{
79072805 3070 register I32 todo;
c4420975 3071 register const char * const frombase = from;
96a5add6 3072 PERL_UNUSED_CONTEXT;
9f68db38 3073
7918f24d
NC
3074 PERL_ARGS_ASSERT_REPEATCPY;
3075
9f68db38 3076 if (len == 1) {
08105a92 3077 register const char c = *from;
9f68db38 3078 while (count-- > 0)
5926133d 3079 *to++ = c;
9f68db38
LW
3080 return;
3081 }
3082 while (count-- > 0) {
3083 for (todo = len; todo > 0; todo--) {
3084 *to++ = *from++;
3085 }
3086 from = frombase;
3087 }
3088}
0f85fab0 3089
fe14fcc3 3090#ifndef HAS_RENAME
79072805 3091I32
4373e329 3092Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 3093{
93a17b20
LW
3094 char *fa = strrchr(a,'/');
3095 char *fb = strrchr(b,'/');
c623ac67
GS
3096 Stat_t tmpstatbuf1;
3097 Stat_t tmpstatbuf2;
c4420975 3098 SV * const tmpsv = sv_newmortal();
62b28dd9 3099
7918f24d
NC
3100 PERL_ARGS_ASSERT_SAME_DIRENT;
3101
62b28dd9
LW
3102 if (fa)
3103 fa++;
3104 else
3105 fa = a;
3106 if (fb)
3107 fb++;
3108 else
3109 fb = b;
3110 if (strNE(a,b))
3111 return FALSE;
3112 if (fa == a)
76f68e9b 3113 sv_setpvs(tmpsv, ".");
62b28dd9 3114 else
46fc3d4c 3115 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 3116 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW
3117 return FALSE;
3118 if (fb == b)
76f68e9b 3119 sv_setpvs(tmpsv, ".");
62b28dd9 3120 else
46fc3d4c 3121 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 3122 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW
3123 return FALSE;
3124 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3125 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3126}
fe14fcc3
LW
3127#endif /* !HAS_RENAME */
3128
491527d0 3129char*
7f315aed
NC
3130Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3131 const char *const *const search_ext, I32 flags)
491527d0 3132{
97aff369 3133 dVAR;
bd61b366
SS
3134 const char *xfound = NULL;
3135 char *xfailed = NULL;
0f31cffe 3136 char tmpbuf[MAXPATHLEN];
491527d0 3137 register char *s;
5f74f29c 3138 I32 len = 0;
491527d0 3139 int retval;
39a02377 3140 char *bufend;
491527d0
GS
3141#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
3142# define SEARCH_EXTS ".bat", ".cmd", NULL
3143# define MAX_EXT_LEN 4
3144#endif
3145#ifdef OS2
3146# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3147# define MAX_EXT_LEN 4
3148#endif
3149#ifdef VMS
3150# define SEARCH_EXTS ".pl", ".com", NULL
3151# define MAX_EXT_LEN 4
3152#endif
3153 /* additional extensions to try in each dir if scriptname not found */
3154#ifdef SEARCH_EXTS
0bcc34c2 3155 static const char *const exts[] = { SEARCH_EXTS };
7f315aed 3156 const char *const *const ext = search_ext ? search_ext : exts;
491527d0 3157 int extidx = 0, i = 0;
bd61b366 3158 const char *curext = NULL;
491527d0 3159#else
53c1dcc0 3160 PERL_UNUSED_ARG(search_ext);
491527d0
GS
3161# define MAX_EXT_LEN 0
3162#endif
3163
7918f24d
NC
3164 PERL_ARGS_ASSERT_FIND_SCRIPT;
3165
491527d0
GS
3166 /*
3167 * If dosearch is true and if scriptname does not contain path
3168 * delimiters, search the PATH for scriptname.
3169 *
3170 * If SEARCH_EXTS is also defined, will look for each
3171 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3172 * while searching the PATH.
3173 *
3174 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3175 * proceeds as follows:
3176 * If DOSISH or VMSISH:
3177 * + look for ./scriptname{,.foo,.bar}
3178 * + search the PATH for scriptname{,.foo,.bar}
3179 *
3180 * If !DOSISH:
3181 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3182 * this will not look in '.' if it's not in the PATH)
3183 */
84486fc6 3184 tmpbuf[0] = '\0';
491527d0
GS
3185
3186#ifdef VMS
3187# ifdef ALWAYS_DEFTYPES
3188 len = strlen(scriptname);
3189 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
c4420975 3190 int idx = 0, deftypes = 1;
491527d0
GS
3191 bool seen_dot = 1;
3192
bd61b366 3193 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
491527d0
GS
3194# else
3195 if (dosearch) {
c4420975 3196 int idx = 0, deftypes = 1;
491527d0
GS
3197 bool seen_dot = 1;
3198
bd61b366 3199 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
491527d0
GS
3200# endif
3201 /* The first time through, just add SEARCH_EXTS to whatever we
3202 * already have, so we can check for default file types. */
3203 while (deftypes ||
84486fc6 3204 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS
3205 {
3206 if (deftypes) {
3207 deftypes = 0;
84486fc6 3208 *tmpbuf = '\0';
491527d0 3209 }
84486fc6
GS
3210 if ((strlen(tmpbuf) + strlen(scriptname)
3211 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 3212 continue; /* don't search dir with too-long name */
6fca0082 3213 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
491527d0
GS
3214#else /* !VMS */
3215
3216#ifdef DOSISH
3217 if (strEQ(scriptname, "-"))
3218 dosearch = 0;
3219 if (dosearch) { /* Look in '.' first. */
fe2774ed 3220 const char *cur = scriptname;
491527d0
GS
3221#ifdef SEARCH_EXTS
3222 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3223 while (ext[i])
3224 if (strEQ(ext[i++],curext)) {
3225 extidx = -1; /* already has an ext */
3226 break;
3227 }
3228 do {
3229#endif
3230 DEBUG_p(PerlIO_printf(Perl_debug_log,
3231 "Looking for %s\n",cur));
017f25f1
IZ
3232 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3233 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS
3234 dosearch = 0;
3235 scriptname = cur;
3236#ifdef SEARCH_EXTS
3237 break;
3238#endif
3239 }
3240#ifdef SEARCH_EXTS
3241 if (cur == scriptname) {
3242 len = strlen(scriptname);
84486fc6 3243 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 3244 break;
9e4425f7
SH
3245 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3246 cur = tmpbuf;
491527d0
GS
3247 }
3248 } while (extidx >= 0 && ext[extidx] /* try an extension? */
6fca0082 3249 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
491527d0
GS
3250#endif
3251 }
3252#endif
3253
cd39f2b6
JH
3254#ifdef MACOS_TRADITIONAL
3255 if (dosearch && !strchr(scriptname, ':') &&
3256 (s = PerlEnv_getenv("Commands")))
3257#else
491527d0
GS
3258 if (dosearch && !strchr(scriptname, '/')
3259#ifdef DOSISH
3260 && !strchr(scriptname, '\\')
3261#endif
cd39f2b6
JH
3262 && (s = PerlEnv_getenv("PATH")))
3263#endif
3264 {
491527d0 3265 bool seen_dot = 0;
92f0c265 3266
39a02377
DM
3267 bufend = s + strlen(s);
3268 while (s < bufend) {
cd39f2b6 3269#ifdef MACOS_TRADITIONAL
39a02377 3270 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
cd39f2b6
JH
3271 ',',
3272 &len);
3273#else
491527d0
GS
3274#if defined(atarist) || defined(DOSISH)
3275 for (len = 0; *s
3276# ifdef atarist
3277 && *s != ','
3278# endif
3279 && *s != ';'; len++, s++) {
84486fc6
GS
3280 if (len < sizeof tmpbuf)
3281 tmpbuf[len] = *s;
491527d0 3282 }
84486fc6
GS
3283 if (len < sizeof tmpbuf)
3284 tmpbuf[len] = '\0';
491527d0 3285#else /* ! (atarist || DOSISH) */
39a02377 3286 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
491527d0
GS
3287 ':',
3288 &len);
3289#endif /* ! (atarist || DOSISH) */
cd39f2b6 3290#endif /* MACOS_TRADITIONAL */
39a02377 3291 if (s < bufend)
491527d0 3292 s++;
84486fc6 3293 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 3294 continue; /* don't search dir with too-long name */
cd39f2b6
JH
3295#ifdef MACOS_TRADITIONAL
3296 if (len && tmpbuf[len - 1] != ':')
3297 tmpbuf[len++] = ':';
3298#else
491527d0 3299 if (len
490a0e98 3300# if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS
3301 && tmpbuf[len - 1] != '/'
3302 && tmpbuf[len - 1] != '\\'
490a0e98 3303# endif
491527d0 3304 )
84486fc6
GS
3305 tmpbuf[len++] = '/';
3306 if (len == 2 && tmpbuf[0] == '.')
491527d0 3307 seen_dot = 1;
cd39f2b6 3308#endif
28f0d0ec 3309 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
491527d0
GS
3310#endif /* !VMS */
3311
3312#ifdef SEARCH_EXTS
84486fc6 3313 len = strlen(tmpbuf);
491527d0
GS
3314 if (extidx > 0) /* reset after previous loop */
3315 extidx = 0;
3316 do {
3317#endif
84486fc6 3318 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 3319 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ
3320 if (S_ISDIR(PL_statbuf.st_mode)) {
3321 retval = -1;
3322 }
491527d0
GS
3323#ifdef SEARCH_EXTS
3324 } while ( retval < 0 /* not there */
3325 && extidx>=0 && ext[extidx] /* try an extension? */
6fca0082 3326 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
491527d0
GS
3327 );
3328#endif
3329 if (retval < 0)
3330 continue;
3280af22
NIS
3331 if (S_ISREG(PL_statbuf.st_mode)
3332 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 3333#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 3334 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS
3335#endif
3336 )
3337 {
3aed30dc 3338 xfound = tmpbuf; /* bingo! */
491527d0
GS
3339 break;
3340 }
3341 if (!xfailed)
84486fc6 3342 xfailed = savepv(tmpbuf);
491527d0
GS
3343 }
3344#ifndef DOSISH
017f25f1 3345 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3346 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3347 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS
3348#endif
3349 seen_dot = 1; /* Disable message. */
9ccb31f9
GS
3350 if (!xfound) {
3351 if (flags & 1) { /* do or die? */
3aed30dc 3352 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS
3353 (xfailed ? "execute" : "find"),
3354 (xfailed ? xfailed : scriptname),
3355 (xfailed ? "" : " on PATH"),
3356 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3357 }
bd61b366 3358 scriptname = NULL;
9ccb31f9 3359 }
43c5f42d 3360 Safefree(xfailed);
491527d0
GS
3361 scriptname = xfound;
3362 }
bd61b366 3363 return (scriptname ? savepv(scriptname) : NULL);
491527d0
GS
3364}
3365
ba869deb
GS
3366#ifndef PERL_GET_CONTEXT_DEFINED
3367
3368void *
3369Perl_get_context(void)
3370{
27da23d5 3371 dVAR;
3db8f154 3372#if defined(USE_ITHREADS)
ba869deb
GS
3373# ifdef OLD_PTHREADS_API
3374 pthread_addr_t t;
3375 if (pthread_getspecific(PL_thr_key, &t))
3376 Perl_croak_nocontext("panic: pthread_getspecific");
3377 return (void*)t;
3378# else
bce813aa 3379# ifdef I_MACH_CTHREADS
8b8b35ab 3380 return (void*)cthread_data(cthread_self());
bce813aa 3381# else
8b8b35ab
JH
3382 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3383# endif
c44d3fdb 3384# endif
ba869deb
GS
3385#else
3386 return (void*)NULL;
3387#endif
3388}
3389
3390void
3391Perl_set_context(void *t)
3392{
8772537c 3393 dVAR;
7918f24d 3394 PERL_ARGS_ASSERT_SET_CONTEXT;
3db8f154 3395#if defined(USE_ITHREADS)
c44d3fdb
GS
3396# ifdef I_MACH_CTHREADS
3397 cthread_set_data(cthread_self(), t);
3398# else
ba869deb
GS
3399 if (pthread_setspecific(PL_thr_key, t))
3400 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3401# endif
b464bac0 3402#else
8772537c 3403 PERL_UNUSED_ARG(t);
ba869deb
GS
3404#endif
3405}
3406
3407#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3408
27da23d5 3409#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3410struct perl_vars *
864dbfa3 3411Perl_GetVars(pTHX)
22239a37 3412{
533c011a 3413 return &PL_Vars;
22239a37 3414}
31fb1209
NIS
3415#endif
3416
1cb0ed9b 3417char **
864dbfa3 3418Perl_get_op_names(pTHX)
31fb1209 3419{
96a5add6
AL
3420 PERL_UNUSED_CONTEXT;
3421 return (char **)PL_op_name;
31fb1209
NIS
3422}
3423
1cb0ed9b 3424char **
864dbfa3 3425Perl_get_op_descs(pTHX)
31fb1209 3426{
96a5add6
AL
3427 PERL_UNUSED_CONTEXT;
3428 return (char **)PL_op_desc;
31fb1209 3429}
9e6b2b00 3430
e1ec3a88 3431const char *
864dbfa3 3432Perl_get_no_modify(pTHX)
9e6b2b00 3433{
96a5add6
AL
3434 PERL_UNUSED_CONTEXT;
3435 return PL_no_modify;
9e6b2b00
GS
3436}
3437
3438U32 *
864dbfa3 3439Perl_get_opargs(pTHX)
9e6b2b00 3440{
96a5add6
AL
3441 PERL_UNUSED_CONTEXT;
3442 return (U32 *)PL_opargs;
9e6b2b00 3443}
51aa15f3 3444
0cb96387
GS
3445PPADDR_t*
3446Perl_get_ppaddr(pTHX)
3447{
96a5add6
AL
3448 dVAR;
3449 PERL_UNUSED_CONTEXT;
3450 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS
3451}
3452
a6c40364
GS
3453#ifndef HAS_GETENV_LEN
3454char *
bf4acbe4 3455Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3456{
8772537c 3457 char * const env_trans = PerlEnv_getenv(env_elem);
96a5add6 3458 PERL_UNUSED_CONTEXT;
7918f24d 3459 PERL_ARGS_ASSERT_GETENV_LEN;
a6c40364
GS
3460 if (env_trans)
3461 *len = strlen(env_trans);
3462 return env_trans;
f675dbe5
CB
3463}
3464#endif
3465
dc9e4912
GS
3466
3467MGVTBL*
864dbfa3 3468Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3469{
7452cf6a 3470 const MGVTBL* result;
96a5add6 3471 PERL_UNUSED_CONTEXT;
dc9e4912
GS
3472
3473 switch(vtbl_id) {
3474 case want_vtbl_sv:
3475 result = &PL_vtbl_sv;
3476 break;
3477 case want_vtbl_env:
3478 result = &PL_vtbl_env;
3479 break;
3480 case want_vtbl_envelem:
3481 result = &PL_vtbl_envelem;
3482 break;
3483 case want_vtbl_sig:
3484 result = &PL_vtbl_sig;
3485 break;
3486 case want_vtbl_sigelem:
3487 result = &PL_vtbl_sigelem;
3488 break;
3489 case want_vtbl_pack:
3490 result = &PL_vtbl_pack;
3491 break;
3492 case want_vtbl_packelem:
3493 result = &PL_vtbl_packelem;
3494 break;
3495 case want_vtbl_dbline:
3496 result = &PL_vtbl_dbline;
3497 break;
3498 case want_vtbl_isa:
3499 result = &PL_vtbl_isa;
3500 break;
3501 case want_vtbl_isaelem:
3502 result = &PL_vtbl_isaelem;
3503 break;
3504 case want_vtbl_arylen:
3505 result = &PL_vtbl_arylen;
3506 break;
dc9e4912
GS
3507 case want_vtbl_mglob:
3508 result = &PL_vtbl_mglob;
3509 break;
3510 case want_vtbl_nkeys:
3511 result = &PL_vtbl_nkeys;
3512 break;
3513 case want_vtbl_taint:
3514 result = &PL_vtbl_taint;
3515 break;
3516 case want_vtbl_substr:
3517 result = &PL_vtbl_substr;
3518 break;
3519 case want_vtbl_vec:
3520 result = &PL_vtbl_vec;
3521 break;
3522 case want_vtbl_pos:
3523 result = &PL_vtbl_pos;
3524 break;
3525 case want_vtbl_bm:
3526 result = &PL_vtbl_bm;
3527 break;
3528 case want_vtbl_fm:
3529 result = &PL_vtbl_fm;
3530 break;
3531 case want_vtbl_uvar:
3532 result = &PL_vtbl_uvar;
3533 break;
dc9e4912
GS
3534 case want_vtbl_defelem:
3535 result = &PL_vtbl_defelem;
3536 break;
3537 case want_vtbl_regexp:
3538 result = &PL_vtbl_regexp;
3539 break;
3540 case want_vtbl_regdata:
3541 result = &PL_vtbl_regdata;
3542 break;
3543 case want_vtbl_regdatum:
3544 result = &PL_vtbl_regdatum;
3545 break;
3c90161d 3546#ifdef USE_LOCALE_COLLATE
dc9e4912
GS
3547 case want_vtbl_collxfrm:
3548 result = &PL_vtbl_collxfrm;
3549 break;
3c90161d 3550#endif
dc9e4912
GS
3551 case want_vtbl_amagic:
3552 result = &PL_vtbl_amagic;
3553 break;
3554 case want_vtbl_amagicelem:
3555 result = &PL_vtbl_amagicelem;
3556 break;
810b8aa5
GS
3557 case want_vtbl_backref:
3558 result = &PL_vtbl_backref;
3559 break;
7e8c5dac
HS
3560 case want_vtbl_utf8:
3561 result = &PL_vtbl_utf8;
3562 break;
7452cf6a 3563 default:
4608196e 3564 result = NULL;
7452cf6a 3565 break;
dc9e4912 3566 }
27da23d5 3567 return (MGVTBL*)result;
dc9e4912
GS
3568}
3569
767df6a1 3570I32
864dbfa3 3571Perl_my_fflush_all(pTHX)
767df6a1 3572{
f800e14d 3573#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3574 return PerlIO_flush(NULL);
767df6a1 3575#else