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Normalise 3 fatal pack/unpack error messages to "panic: %s"
[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 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 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 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 331 return ptr;
332 }
3280af22 333 else if (PL_nomemok)
bd61b366 334 return NULL;
0bd48802 335 return write_no_mem();
1050c9ca 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 *
04c9e624 372Perl_delimcpy(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;
35da51f7 375
7918f24d
NC		 376 PERL_ARGS_ASSERT_DELIMCPY;
377
fc36a67e 378 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b 379 if (*from == '\\') {
35da51f7 380 if (from[1] != delim) {
fc36a67e 381 if (to < toend)
382 *to++ = *from;
383 tolen++;
fc36a67e 384 }
35da51f7 385 from++;
378cc40b 386 }
bedebaa5 387 else if (*from == delim)
8d063cd8 388 break;
fc36a67e 389 if (to < toend)
390 *to++ = *from;
8d063cd8 391 }
bedebaa5
CS		 392 if (to < toend)
393 *to = '\0';
fc36a67e 394 *retlen = tolen;
73d840c0 395 return (char *)from;
8d063cd8
LW		 396}
397
398/* return ptr to little string in big string, NULL if not found */
378cc40b 399/* This routine was donated by Corey Satten. */
8d063cd8
LW		 400
401char *
04c9e624 402Perl_instr(register const char *big, register const char *little)
378cc40b 403{
79072805 404 register I32 first;
378cc40b 405
7918f24d
NC		 406 PERL_ARGS_ASSERT_INSTR;
407
a687059c 408 if (!little)
08105a92 409 return (char*)big;
a687059c 410 first = *little++;
378cc40b 411 if (!first)
08105a92 412 return (char*)big;
378cc40b 413 while (*big) {
66a1b24b 414 register const char *s, *x;
378cc40b
LW		 415 if (*big++ != first)
416 continue;
417 for (x=big,s=little; *s; /**/ ) {
418 if (!*x)
bd61b366 419 return NULL;
4fc877ac 420 if (*s != *x)
378cc40b 421 break;
4fc877ac
AL		 422 else {
423 s++;
424 x++;
378cc40b
LW		 425 }
426 }
427 if (!*s)
08105a92 428 return (char*)(big-1);
378cc40b 429 }
bd61b366 430 return NULL;
378cc40b 431}
8d063cd8 432
a687059c
LW		 433/* same as instr but allow embedded nulls */
434
435char *
04c9e624 436Perl_ninstr(const char *big, const char *bigend, const char *little, const char *lend)
8d063cd8 437{
7918f24d 438 PERL_ARGS_ASSERT_NINSTR;
4c8626be
GA		 439 if (little >= lend)
440 return (char*)big;
441 {
8ba22ff4 442 const char first = *little;
4c8626be 443 const char *s, *x;
8ba22ff4 444 bigend -= lend - little++;
4c8626be
GA		 445 OUTER:
446 while (big <= bigend) {
b0ca24ee
JH		 447 if (*big++ == first) {
448 for (x=big,s=little; s < lend; x++,s++) {
449 if (*s != *x)
450 goto OUTER;
451 }
452 return (char*)(big-1);
4c8626be 453 }
4c8626be 454 }
378cc40b 455 }
bd61b366 456 return NULL;
a687059c
LW		 457}
458
459/* reverse of the above--find last substring */
460
461char *
04c9e624 462Perl_rninstr(register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 463{
08105a92 464 register const char *bigbeg;
e1ec3a88 465 register const I32 first = *little;
7452cf6a 466 register const char * const littleend = lend;
a687059c 467
7918f24d
NC		 468 PERL_ARGS_ASSERT_RNINSTR;
469
260d78c9 470 if (little >= littleend)
08105a92 471 return (char*)bigend;
a687059c
LW		 472 bigbeg = big;
473 big = bigend - (littleend - little++);
474 while (big >= bigbeg) {
66a1b24b 475 register const char *s, *x;
a687059c
LW		 476 if (*big-- != first)
477 continue;
478 for (x=big+2,s=little; s < littleend; /**/ ) {
4fc877ac 479 if (*s != *x)
a687059c 480 break;
4fc877ac
AL		 481 else {
482 x++;
483 s++;
a687059c
LW		 484 }
485 }
486 if (s >= littleend)
08105a92 487 return (char*)(big+1);
378cc40b 488 }
bd61b366 489 return NULL;
378cc40b 490}
a687059c 491
cf93c79d
IZ		 492/* As a space optimization, we do not compile tables for strings of length
493 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
494 special-cased in fbm_instr().
495
496 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
497
954c1994 498/*
ccfc67b7
JH		 499=head1 Miscellaneous Functions
500
954c1994
GS		 501=for apidoc fbm_compile
502
503Analyses the string in order to make fast searches on it using fbm_instr()
504-- the Boyer-Moore algorithm.
505
506=cut
507*/
508
378cc40b 509void
7506f9c3 510Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 511{
97aff369 512 dVAR;
0d46e09a 513 register const U8 *s;
79072805 514 register U32 i;
0b71040e 515 STRLEN len;
cb742848 516 U32 rarest = 0;
79072805
LW		 517 U32 frequency = 256;
518
7918f24d
NC		 519 PERL_ARGS_ASSERT_FBM_COMPILE;
520
c517dc2b 521 if (flags & FBMcf_TAIL) {
890ce7af 522 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
396482e1 523 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
c517dc2b
JH		 524 if (mg && mg->mg_len >= 0)
525 mg->mg_len++;
526 }
9cbe880b 527 s = (U8*)SvPV_force_mutable(sv, len);
d1be9408 528 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 529 return;
cecf5685 530 SvUPGRADE(sv, SVt_PVGV);
78d0cf80 531 SvIOK_off(sv);
8eeaf79a
NC		 532 SvNOK_off(sv);
533 SvVALID_on(sv);
02128f11 534 if (len > 2) {
9cbe880b 535 const unsigned char *sb;
66a1b24b 536 const U8 mlen = (len>255) ? 255 : (U8)len;
890ce7af 537 register U8 *table;
cf93c79d 538
d8419e03
NC		 539 Sv_Grow(sv, len + 256 + PERL_FBM_TABLE_OFFSET);
540 table
541 = (unsigned char*)(SvPVX_mutable(sv) + len + PERL_FBM_TABLE_OFFSET);
542 s = table - 1 - PERL_FBM_TABLE_OFFSET; /* last char */
7506f9c3 543 memset((void*)table, mlen, 256);
02128f11 544 i = 0;
7506f9c3 545 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ		 546 while (s >= sb) {
547 if (table[*s] == mlen)
7506f9c3 548 table[*s] = (U8)i;
cf93c79d
IZ		 549 s--, i++;
550 }
d0688fc4
NC		 551 } else {
552 Sv_Grow(sv, len + PERL_FBM_TABLE_OFFSET);
378cc40b 553 }
a0714e2c 554 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
378cc40b 555
9cbe880b 556 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 557 for (i = 0; i < len; i++) {
22c35a8c 558 if (PL_freq[s[i]] < frequency) {
bbce6d69 559 rarest = i;
22c35a8c 560 frequency = PL_freq[s[i]];
378cc40b
LW		 561 }
562 }
610460f9 563 BmFLAGS(sv) = (U8)flags;
79072805 564 BmRARE(sv) = s[rarest];
44a10c71 565 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ		 566 BmUSEFUL(sv) = 100; /* Initial value */
567 if (flags & FBMcf_TAIL)
568 SvTAIL_on(sv);
8eeaf79a
NC		 569 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %lu\n",
570 BmRARE(sv),(unsigned long)BmPREVIOUS(sv)));
378cc40b
LW		 571}
572
cf93c79d
IZ		 573/* If SvTAIL(littlestr), it has a fake '\n' at end. */
574/* If SvTAIL is actually due to \Z or \z, this gives false positives
575 if multiline */
576
954c1994
GS		 577/*
578=for apidoc fbm_instr
579
580Returns the location of the SV in the string delimited by C<str> and
bd61b366 581C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
954c1994
GS		 582does not have to be fbm_compiled, but the search will not be as fast
583then.
584
585=cut
586*/
587
378cc40b 588char *
864dbfa3 589Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 590{
a687059c 591 register unsigned char *s;
cf93c79d 592 STRLEN l;
9cbe880b
NC		 593 register const unsigned char *little
594 = (const unsigned char *)SvPV_const(littlestr,l);
cf93c79d 595 register STRLEN littlelen = l;
e1ec3a88 596 register const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 597
7918f24d
NC		 598 PERL_ARGS_ASSERT_FBM_INSTR;
599
eb160463 600 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 601 if ( SvTAIL(littlestr)
eb160463 602 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 603 && (littlelen == 1
12ae5dfc 604 || (*big == *little &&
27da23d5 605 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d 606 return (char*)big;
bd61b366 607 return NULL;
cf93c79d 608 }
378cc40b 609
cf93c79d 610 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ		 611
612 if (littlelen == 1) {
613 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
614 /* Know that bigend != big. */
615 if (bigend[-1] == '\n')
616 return (char *)(bigend - 1);
617 return (char *) bigend;
618 }
619 s = big;
620 while (s < bigend) {
621 if (*s == *little)
622 return (char *)s;
623 s++;
624 }
625 if (SvTAIL(littlestr))
626 return (char *) bigend;
bd61b366 627 return NULL;
cf93c79d
IZ		 628 }
629 if (!littlelen)
630 return (char*)big; /* Cannot be SvTAIL! */
631
632 /* littlelen is 2 */
633 if (SvTAIL(littlestr) && !multiline) {
634 if (bigend[-1] == '\n' && bigend[-2] == *little)
635 return (char*)bigend - 2;
636 if (bigend[-1] == *little)
637 return (char*)bigend - 1;
bd61b366 638 return NULL;
cf93c79d
IZ		 639 }
640 {
641 /* This should be better than FBM if c1 == c2, and almost
642 as good otherwise: maybe better since we do less indirection.
643 And we save a lot of memory by caching no table. */
66a1b24b
AL		 644 const unsigned char c1 = little[0];
645 const unsigned char c2 = little[1];
cf93c79d
IZ		 646
647 s = big + 1;
648 bigend--;
649 if (c1 != c2) {
650 while (s <= bigend) {
651 if (s[0] == c2) {
652 if (s[-1] == c1)
653 return (char*)s - 1;
654 s += 2;
655 continue;
3fe6f2dc 656 }
cf93c79d
IZ		 657 next_chars:
658 if (s[0] == c1) {
659 if (s == bigend)
660 goto check_1char_anchor;
661 if (s[1] == c2)
662 return (char*)s;
663 else {
664 s++;
665 goto next_chars;
666 }
667 }
668 else
669 s += 2;
670 }
671 goto check_1char_anchor;
672 }
673 /* Now c1 == c2 */
674 while (s <= bigend) {
675 if (s[0] == c1) {
676 if (s[-1] == c1)
677 return (char*)s - 1;
678 if (s == bigend)
679 goto check_1char_anchor;
680 if (s[1] == c1)
681 return (char*)s;
682 s += 3;
02128f11 683 }
c277df42 684 else
cf93c79d 685 s += 2;
c277df42 686 }
c277df42 687 }
cf93c79d
IZ		 688 check_1char_anchor: /* One char and anchor! */
689 if (SvTAIL(littlestr) && (*bigend == *little))
690 return (char *)bigend; /* bigend is already decremented. */
bd61b366 691 return NULL;
d48672a2 692 }
cf93c79d 693 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 694 s = bigend - littlelen;
a1d180c4 695 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ		 696 /* Automatically of length > 2 */
697 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 698 {
bbce6d69 699 return (char*)s; /* how sweet it is */
7506f9c3
GS		 700 }
701 if (s[1] == *little
702 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
703 {
cf93c79d 704 return (char*)s + 1; /* how sweet it is */
7506f9c3 705 }
bd61b366 706 return NULL;
02128f11 707 }
cecf5685 708 if (!SvVALID(littlestr)) {
c4420975 709 char * const b = ninstr((char*)big,(char*)bigend,
cf93c79d
IZ		 710 (char*)little, (char*)little + littlelen);
711
712 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
713 /* Chop \n from littlestr: */
714 s = bigend - littlelen + 1;
7506f9c3
GS		 715 if (*s == *little
716 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
717 {
3fe6f2dc 718 return (char*)s;
7506f9c3 719 }
bd61b366 720 return NULL;
a687059c 721 }
cf93c79d 722 return b;
a687059c 723 }
a1d180c4 724
3566a07d
NC		 725 /* Do actual FBM. */
726 if (littlelen > (STRLEN)(bigend - big))
727 return NULL;
728
729 {
d8419e03
NC		 730 register const unsigned char * const table
731 = little + littlelen + PERL_FBM_TABLE_OFFSET;
0d46e09a 732 register const unsigned char *oldlittle;
cf93c79d 733
cf93c79d
IZ		 734 --littlelen; /* Last char found by table lookup */
735
736 s = big + littlelen;
737 little += littlelen; /* last char */
738 oldlittle = little;
739 if (s < bigend) {
740 register I32 tmp;
741
742 top2:
7506f9c3 743 if ((tmp = table[*s])) {
cf93c79d 744 if ((s += tmp) < bigend)
62b28dd9 745 goto top2;
cf93c79d
IZ		 746 goto check_end;
747 }
748 else { /* less expensive than calling strncmp() */
66a1b24b 749 register unsigned char * const olds = s;
cf93c79d
IZ		 750
751 tmp = littlelen;
752
753 while (tmp--) {
754 if (*--s == *--little)
755 continue;
cf93c79d
IZ		 756 s = olds + 1; /* here we pay the price for failure */
757 little = oldlittle;
758 if (s < bigend) /* fake up continue to outer loop */
759 goto top2;
760 goto check_end;
761 }
762 return (char *)s;
a687059c 763 }
378cc40b 764 }
cf93c79d 765 check_end:
c8029a41 766 if ( s == bigend
8eeaf79a 767 && (BmFLAGS(littlestr) & FBMcf_TAIL)
12ae5dfc
JH		 768 && memEQ((char *)(bigend - littlelen),
769 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d 770 return (char*)bigend - littlelen;
bd61b366 771 return NULL;
378cc40b 772 }
378cc40b
LW		 773}
774
c277df42
IZ		 775/* start_shift, end_shift are positive quantities which give offsets
776 of ends of some substring of bigstr.
a0288114 777 If "last" we want the last occurrence.
c277df42 778 old_posp is the way of communication between consequent calls if
a1d180c4 779 the next call needs to find the .
c277df42 780 The initial *old_posp should be -1.
cf93c79d
IZ		 781
782 Note that we take into account SvTAIL, so one can get extra
783 optimizations if _ALL flag is set.
c277df42
IZ		 784 */
785
cf93c79d 786/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 787 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ		 788 is not supported yet. */
789
378cc40b 790char *
864dbfa3 791Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 792{
97aff369 793 dVAR;
0d46e09a 794 register const unsigned char *big;
79072805
LW		 795 register I32 pos;
796 register I32 previous;
797 register I32 first;
0d46e09a 798 register const unsigned char *little;
c277df42 799 register I32 stop_pos;
0d46e09a 800 register const unsigned char *littleend;
c277df42 801 I32 found = 0;
378cc40b 802
7918f24d
NC		 803 PERL_ARGS_ASSERT_SCREAMINSTR;
804
cecf5685
NC		 805 assert(SvTYPE(littlestr) == SVt_PVGV);
806 assert(SvVALID(littlestr));
d372c834 807
c277df42 808 if (*old_posp == -1
3280af22 809 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 810 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
811 cant_find:
a1d180c4 812 if ( BmRARE(littlestr) == '\n'
85c508c3 813 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
cfd0369c 814 little = (const unsigned char *)(SvPVX_const(littlestr));
cf93c79d
IZ		 815 littleend = little + SvCUR(littlestr);
816 first = *little++;
817 goto check_tail;
818 }
bd61b366 819 return NULL;
cf93c79d
IZ		 820 }
821
cfd0369c 822 little = (const unsigned char *)(SvPVX_const(littlestr));
79072805 823 littleend = little + SvCUR(littlestr);
378cc40b 824 first = *little++;
c277df42 825 /* The value of pos we can start at: */
79072805 826 previous = BmPREVIOUS(littlestr);
cfd0369c 827 big = (const unsigned char *)(SvPVX_const(bigstr));
c277df42
IZ		 828 /* The value of pos we can stop at: */
829 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 830 if (previous + start_shift > stop_pos) {
0fe87f7c
HS		 831/*
832 stop_pos does not include SvTAIL in the count, so this check is incorrect
833 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
834*/
835#if 0
cf93c79d
IZ		 836 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
837 goto check_tail;
0fe87f7c 838#endif
bd61b366 839 return NULL;
cf93c79d 840 }
c277df42 841 while (pos < previous + start_shift) {
3280af22 842 if (!(pos += PL_screamnext[pos]))
cf93c79d 843 goto cant_find;
378cc40b 844 }
de3bb511 845 big -= previous;
bbce6d69 846 do {
0d46e09a 847 register const unsigned char *s, *x;
ef64f398 848 if (pos >= stop_pos) break;
bbce6d69 849 if (big[pos] != first)
850 continue;
851 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69 852 if (*s++ != *x++) {
853 s--;
854 break;
378cc40b 855 }
bbce6d69 856 }
c277df42
IZ		 857 if (s == littleend) {
858 *old_posp = pos;
859 if (!last) return (char *)(big+pos);
860 found = 1;
861 }
3280af22 862 } while ( pos += PL_screamnext[pos] );
a1d180c4 863 if (last && found)
cf93c79d 864 return (char *)(big+(*old_posp));
cf93c79d
IZ		 865 check_tail:
866 if (!SvTAIL(littlestr) || (end_shift > 0))
bd61b366 867 return NULL;
cf93c79d 868 /* Ignore the trailing "\n". This code is not microoptimized */
cfd0369c 869 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
cf93c79d
IZ		 870 stop_pos = littleend - little; /* Actual littlestr len */
871 if (stop_pos == 0)
872 return (char*)big;
873 big -= stop_pos;
874 if (*big == first
12ae5dfc
JH		 875 && ((stop_pos == 1) ||
876 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d 877 return (char*)big;
bd61b366 878 return NULL;
8d063cd8
LW		 879}
880
79072805 881I32
04c9e624 882Perl_ibcmp(const char *s1, const char *s2, register I32 len)
79072805 883{
e1ec3a88
AL		 884 register const U8 *a = (const U8 *)s1;
885 register const U8 *b = (const U8 *)s2;
96a5add6 886
7918f24d
NC		 887 PERL_ARGS_ASSERT_IBCMP;
888
79072805 889 while (len--) {
22c35a8c 890 if (*a != *b && *a != PL_fold[*b])
bbce6d69 891 return 1;
892 a++,b++;
893 }
894 return 0;
895}
896
897I32
04c9e624 898Perl_ibcmp_locale(const char *s1, const char *s2, register I32 len)
bbce6d69 899{
27da23d5 900 dVAR;
e1ec3a88
AL		 901 register const U8 *a = (const U8 *)s1;
902 register const U8 *b = (const U8 *)s2;
96a5add6 903
7918f24d
NC		 904 PERL_ARGS_ASSERT_IBCMP_LOCALE;
905
bbce6d69 906 while (len--) {
22c35a8c 907 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69 908 return 1;
909 a++,b++;
79072805
LW		 910 }
911 return 0;
912}
913
8d063cd8
LW		 914/* copy a string to a safe spot */
915
954c1994 916/*
ccfc67b7
JH		 917=head1 Memory Management
918
954c1994
GS		 919=for apidoc savepv
920
61a925ed
AMS		 921Perl's version of C<strdup()>. Returns a pointer to a newly allocated
922string which is a duplicate of C<pv>. The size of the string is
923determined by C<strlen()>. The memory allocated for the new string can
924be freed with the C<Safefree()> function.
954c1994
GS		 925
926=cut
927*/
928
8d063cd8 929char *
efdfce31 930Perl_savepv(pTHX_ const char *pv)
8d063cd8 931{
96a5add6 932 PERL_UNUSED_CONTEXT;
e90e2364 933 if (!pv)
bd61b366 934 return NULL;
66a1b24b
AL		 935 else {
936 char *newaddr;
937 const STRLEN pvlen = strlen(pv)+1;
10edeb5d
JH		 938 Newx(newaddr, pvlen, char);
939 return (char*)memcpy(newaddr, pv, pvlen);
66a1b24b 940 }
8d063cd8
LW		 941}
942
a687059c
LW		 943/* same thing but with a known length */
944
954c1994
GS		 945/*
946=for apidoc savepvn
947
61a925ed
AMS		 948Perl's version of what C<strndup()> would be if it existed. Returns a
949pointer to a newly allocated string which is a duplicate of the first
cbf82dd0
NC		 950C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
951the new string can be freed with the C<Safefree()> function.
954c1994
GS		 952
953=cut
954*/
955
a687059c 956char *
efdfce31 957Perl_savepvn(pTHX_ const char *pv, register I32 len)
a687059c
LW		 958{
959 register char *newaddr;
96a5add6 960 PERL_UNUSED_CONTEXT;
a687059c 961
a02a5408 962 Newx(newaddr,len+1,char);
92110913 963 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 964 if (pv) {
e90e2364
NC		 965 /* might not be null terminated */
966 newaddr[len] = '\0';
07409e01 967 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS		 968 }
969 else {
07409e01 970 return (char *) ZeroD(newaddr,len+1,char);
92110913 971 }
a687059c
LW		 972}
973
05ec9bb3
NIS		 974/*
975=for apidoc savesharedpv
976
61a925ed
AMS		 977A version of C<savepv()> which allocates the duplicate string in memory
978which is shared between threads.
05ec9bb3
NIS		 979
980=cut
981*/
982char *
efdfce31 983Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 984{
e90e2364 985 register char *newaddr;
490a0e98 986 STRLEN pvlen;
e90e2364 987 if (!pv)
bd61b366 988 return NULL;
e90e2364 989
490a0e98
NC		 990 pvlen = strlen(pv)+1;
991 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364 992 if (!newaddr) {
0bd48802 993 return write_no_mem();
05ec9bb3 994 }
10edeb5d 995 return (char*)memcpy(newaddr, pv, pvlen);
05ec9bb3
NIS		 996}
997
2e0de35c 998/*
d9095cec
NC		 999=for apidoc savesharedpvn
1000
1001A version of C<savepvn()> which allocates the duplicate string in memory
1002which is shared between threads. (With the specific difference that a NULL
1003pointer is not acceptable)
1004
1005=cut
1006*/
1007char *
1008Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
1009{
1010 char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
7918f24d
NC		 1011
1012 PERL_ARGS_ASSERT_SAVESHAREDPVN;
1013
d9095cec
NC		 1014 if (!newaddr) {
1015 return write_no_mem();
1016 }
1017 newaddr[len] = '\0';
1018 return (char*)memcpy(newaddr, pv, len);
1019}
1020
1021/*
2e0de35c
NC		 1022=for apidoc savesvpv
1023
6832267f 1024A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC		 1025the passed in SV using C<SvPV()>
1026
1027=cut
1028*/
1029
1030char *
1031Perl_savesvpv(pTHX_ SV *sv)
1032{
1033 STRLEN len;
7452cf6a 1034 const char * const pv = SvPV_const(sv, len);
2e0de35c
NC		 1035 register char *newaddr;
1036
7918f24d
NC		 1037 PERL_ARGS_ASSERT_SAVESVPV;
1038
26866f99 1039 ++len;
a02a5408 1040 Newx(newaddr,len,char);
07409e01 1041 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 1042}
05ec9bb3
NIS		 1043
1044
cea2e8a9 1045/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 1046
76e3520e 1047STATIC SV *
cea2e8a9 1048S_mess_alloc(pTHX)
fc36a67e 1049{
97aff369 1050 dVAR;
fc36a67e 1051 SV *sv;
1052 XPVMG *any;
1053
e72dc28c 1054 if (!PL_dirty)
84bafc02 1055 return newSVpvs_flags("", SVs_TEMP);
e72dc28c 1056
0372dbb6
GS		 1057 if (PL_mess_sv)
1058 return PL_mess_sv;
1059
fc36a67e 1060 /* Create as PVMG now, to avoid any upgrading later */
a02a5408
JC		 1061 Newx(sv, 1, SV);
1062 Newxz(any, 1, XPVMG);
fc36a67e 1063 SvFLAGS(sv) = SVt_PVMG;
1064 SvANY(sv) = (void*)any;
6136c704 1065 SvPV_set(sv, NULL);
fc36a67e 1066 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 1067 PL_mess_sv = sv;
fc36a67e 1068 return sv;
1069}
1070
c5be433b 1071#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1072char *
1073Perl_form_nocontext(const char* pat, ...)
1074{
1075 dTHX;
c5be433b 1076 char *retval;
cea2e8a9 1077 va_list args;
7918f24d 1078 PERL_ARGS_ASSERT_FORM_NOCONTEXT;
cea2e8a9 1079 va_start(args, pat);
c5be433b 1080 retval = vform(pat, &args);
cea2e8a9 1081 va_end(args);
c5be433b 1082 return retval;
cea2e8a9 1083}
c5be433b 1084#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1085
7c9e965c 1086/*
ccfc67b7 1087=head1 Miscellaneous Functions
7c9e965c
JP		 1088=for apidoc form
1089
1090Takes a sprintf-style format pattern and conventional
1091(non-SV) arguments and returns the formatted string.
1092
1093 (char *) Perl_form(pTHX_ const char* pat, ...)
1094
1095can be used any place a string (char *) is required:
1096
1097 char * s = Perl_form("%d.%d",major,minor);
1098
1099Uses a single private buffer so if you want to format several strings you
1100must explicitly copy the earlier strings away (and free the copies when you
1101are done).
1102
1103=cut
1104*/
1105
8990e307 1106char *
864dbfa3 1107Perl_form(pTHX_ const char* pat, ...)
8990e307 1108{
c5be433b 1109 char *retval;
46fc3d4c 1110 va_list args;
7918f24d 1111 PERL_ARGS_ASSERT_FORM;
46fc3d4c 1112 va_start(args, pat);
c5be433b 1113 retval = vform(pat, &args);
46fc3d4c 1114 va_end(args);
c5be433b
GS		 1115 return retval;
1116}
1117
1118char *
1119Perl_vform(pTHX_ const char *pat, va_list *args)
1120{
2d03de9c 1121 SV * const sv = mess_alloc();
7918f24d 1122 PERL_ARGS_ASSERT_VFORM;
4608196e 1123 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
e72dc28c 1124 return SvPVX(sv);
46fc3d4c 1125}
a687059c 1126
5a844595
GS		 1127#if defined(PERL_IMPLICIT_CONTEXT)
1128SV *
1129Perl_mess_nocontext(const char *pat, ...)
1130{
1131 dTHX;
1132 SV *retval;
1133 va_list args;
7918f24d 1134 PERL_ARGS_ASSERT_MESS_NOCONTEXT;
5a844595
GS		 1135 va_start(args, pat);
1136 retval = vmess(pat, &args);
1137 va_end(args);
1138 return retval;
1139}
1140#endif /* PERL_IMPLICIT_CONTEXT */
1141
06bf62c7 1142SV *
5a844595
GS		 1143Perl_mess(pTHX_ const char *pat, ...)
1144{
1145 SV *retval;
1146 va_list args;
7918f24d 1147 PERL_ARGS_ASSERT_MESS;
5a844595
GS		 1148 va_start(args, pat);
1149 retval = vmess(pat, &args);
1150 va_end(args);
1151 return retval;
1152}
1153
5f66b61c
AL		 1154STATIC const COP*
1155S_closest_cop(pTHX_ const COP *cop, const OP *o)
ae7d165c 1156{
97aff369 1157 dVAR;
ae7d165c
PJ		 1158 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1159
7918f24d
NC		 1160 PERL_ARGS_ASSERT_CLOSEST_COP;
1161
fabdb6c0
AL		 1162 if (!o || o == PL_op)
1163 return cop;
ae7d165c
PJ		 1164
1165 if (o->op_flags & OPf_KIDS) {
5f66b61c 1166 const OP *kid;
fabdb6c0 1167 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
5f66b61c 1168 const COP *new_cop;
ae7d165c
PJ		 1169
1170 /* If the OP_NEXTSTATE has been optimised away we can still use it
1171 * the get the file and line number. */
1172
1173 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
5f66b61c 1174 cop = (const COP *)kid;
ae7d165c
PJ		 1175
1176 /* Keep searching, and return when we've found something. */
1177
1178 new_cop = closest_cop(cop, kid);
fabdb6c0
AL		 1179 if (new_cop)
1180 return new_cop;
ae7d165c
PJ		 1181 }
1182 }
1183
1184 /* Nothing found. */
1185
5f66b61c 1186 return NULL;
ae7d165c
PJ		 1187}
1188
5a844595
GS		 1189SV *
1190Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1191{
97aff369 1192 dVAR;
c4420975 1193 SV * const sv = mess_alloc();
46fc3d4c 1194
7918f24d
NC		 1195 PERL_ARGS_ASSERT_VMESS;
1196
5f66b61c 1197 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
46fc3d4c 1198 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ		 1199 /*
1200 * Try and find the file and line for PL_op. This will usually be
1201 * PL_curcop, but it might be a cop that has been optimised away. We
1202 * can try to find such a cop by searching through the optree starting
1203 * from the sibling of PL_curcop.
1204 */
1205
e1ec3a88 1206 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
5f66b61c
AL		 1207 if (!cop)
1208 cop = PL_curcop;
ae7d165c
PJ		 1209
1210 if (CopLINE(cop))
ed094faf 1211 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
3aed30dc 1212 OutCopFILE(cop), (IV)CopLINE(cop));
191f87d5
DH		 1213 /* Seems that GvIO() can be untrustworthy during global destruction. */
1214 if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO)
1215 && IoLINES(GvIOp(PL_last_in_gv)))
1216 {
e1ec3a88 1217 const bool line_mode = (RsSIMPLE(PL_rs) &&
95a20fc0 1218 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
57def98f 1219 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
5f66b61c 1220 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
edc2eac3
JH		 1221 line_mode ? "line" : "chunk",
1222 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1223 }
5f66b61c
AL		 1224 if (PL_dirty)
1225 sv_catpvs(sv, " during global destruction");
1226 sv_catpvs(sv, ".\n");
a687059c 1227 }
06bf62c7 1228 return sv;
a687059c
LW		 1229}
1230
7ff03255
SG		 1231void
1232Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1233{
27da23d5 1234 dVAR;
7ff03255
SG		 1235 IO *io;
1236 MAGIC *mg;
1237
7918f24d
NC		 1238 PERL_ARGS_ASSERT_WRITE_TO_STDERR;
1239
7ff03255
SG		 1240 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1241 && (io = GvIO(PL_stderrgv))
daba3364 1242 && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
7ff03255
SG		 1243 {
1244 dSP;
1245 ENTER;
1246 SAVETMPS;
1247
1248 save_re_context();
1249 SAVESPTR(PL_stderrgv);
a0714e2c 1250 PL_stderrgv = NULL;
7ff03255
SG		 1251
1252 PUSHSTACKi(PERLSI_MAGIC);
1253
1254 PUSHMARK(SP);
1255 EXTEND(SP,2);
daba3364 1256 PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
6e449a3a 1257 mPUSHp(message, msglen);
7ff03255
SG		 1258 PUTBACK;
1259 call_method("PRINT", G_SCALAR);
1260
1261 POPSTACK;
1262 FREETMPS;
1263 LEAVE;
1264 }
1265 else {
1266#ifdef USE_SFIO
1267 /* SFIO can really mess with your errno */
4ee39169 1268 dSAVED_ERRNO;
7ff03255 1269#endif
53c1dcc0 1270 PerlIO * const serr = Perl_error_log;
7ff03255
SG		 1271
1272 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1273 (void)PerlIO_flush(serr);
1274#ifdef USE_SFIO
4ee39169 1275 RESTORE_ERRNO;
7ff03255
SG		 1276#endif
1277 }
1278}
1279
46d9c920 1280/* Common code used by vcroak, vdie, vwarn and vwarner */
3ab1ac99 1281
46d9c920
NC		 1282STATIC bool
1283S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
63315e18 1284{
97aff369 1285 dVAR;
63315e18
NC		 1286 HV *stash;
1287 GV *gv;
1288 CV *cv;
46d9c920
NC		 1289 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1290 /* sv_2cv might call Perl_croak() or Perl_warner() */
1291 SV * const oldhook = *hook;
1292
1293 assert(oldhook);
63315e18 1294
63315e18 1295 ENTER;
46d9c920
NC		 1296 SAVESPTR(*hook);
1297 *hook = NULL;
1298 cv = sv_2cv(oldhook, &stash, &gv, 0);
63315e18
NC		 1299 LEAVE;
1300 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1301 dSP;
1302 SV *msg;
1303
1304 ENTER;
1305 save_re_context();
46d9c920
NC		 1306 if (warn) {
1307 SAVESPTR(*hook);
1308 *hook = NULL;
1309 }
1310 if (warn || message) {
740cce10 1311 msg = newSVpvn_flags(message, msglen, utf8);
63315e18
NC		 1312 SvREADONLY_on(msg);
1313 SAVEFREESV(msg);
1314 }
1315 else {
1316 msg = ERRSV;
1317 }
1318
46d9c920 1319 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
63315e18
NC		 1320 PUSHMARK(SP);
1321 XPUSHs(msg);
1322 PUTBACK;
daba3364 1323 call_sv(MUTABLE_SV(cv), G_DISCARD);
63315e18
NC		 1324 POPSTACK;
1325 LEAVE;
46d9c920 1326 return TRUE;
63315e18 1327 }
46d9c920 1328 return FALSE;
63315e18
NC		 1329}
1330
cfd0369c 1331STATIC const char *
e07360fa
AT		 1332S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1333 I32* utf8)
1334{
1335 dVAR;
cfd0369c 1336 const char *message;
e07360fa
AT		 1337
1338 if (pat) {
890ce7af 1339 SV * const msv = vmess(pat, args);
e07360fa
AT		 1340 if (PL_errors && SvCUR(PL_errors)) {
1341 sv_catsv(PL_errors, msv);
cfd0369c 1342 message = SvPV_const(PL_errors, *msglen);
e07360fa
AT		 1343 SvCUR_set(PL_errors, 0);
1344 }
1345 else
cfd0369c 1346 message = SvPV_const(msv,*msglen);
e07360fa
AT		 1347 *utf8 = SvUTF8(msv);
1348 }
1349 else {
bd61b366 1350 message = NULL;
e07360fa
AT		 1351 }
1352
e07360fa 1353 if (PL_diehook) {
46d9c920 1354 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
e07360fa
AT		 1355 }
1356 return message;
1357}
1358
1f676739 1359static OP *
e3cf49e2 1360S_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1361{
97aff369 1362 dVAR;
73d840c0 1363 const char *message;
e1ec3a88 1364 const int was_in_eval = PL_in_eval;
06bf62c7 1365 STRLEN msglen;
ff882698 1366 I32 utf8 = 0;
36477c24 1367
890ce7af 1368 message = vdie_croak_common(pat, args, &msglen, &utf8);
36477c24 1369
06bf62c7 1370 PL_restartop = die_where(message, msglen);
ff882698 1371 SvFLAGS(ERRSV) |= utf8;
3280af22 1372 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1373 JMPENV_JUMP(3);
3280af22 1374 return PL_restartop;
36477c24 1375}
1376
c5be433b 1377#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1378OP *
1379Perl_die_nocontext(const char* pat, ...)
a687059c 1380{
cea2e8a9
GS		 1381 dTHX;
1382 OP *o;
a687059c 1383 va_list args;
cea2e8a9 1384 va_start(args, pat);
c5be433b 1385 o = vdie(pat, &args);
cea2e8a9
GS		 1386 va_end(args);
1387 return o;
1388}
c5be433b 1389#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS		 1390
1391OP *
1392Perl_die(pTHX_ const char* pat, ...)
1393{
1394 OP *o;
1395 va_list args;
1396 va_start(args, pat);
c5be433b 1397 o = vdie(pat, &args);
cea2e8a9
GS		 1398 va_end(args);
1399 return o;
1400}
1401
c5be433b
GS		 1402void
1403Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1404{
97aff369 1405 dVAR;
73d840c0 1406 const char *message;
06bf62c7 1407 STRLEN msglen;
ff882698 1408 I32 utf8 = 0;
a687059c 1409
3ab1ac99 1410 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
5a844595 1411
3280af22 1412 if (PL_in_eval) {
06bf62c7 1413 PL_restartop = die_where(message, msglen);
ff882698 1414 SvFLAGS(ERRSV) |= utf8;
6224f72b 1415 JMPENV_JUMP(3);
a0d0e21e 1416 }
84414e3e 1417 else if (!message)
cfd0369c 1418 message = SvPVx_const(ERRSV, msglen);
84414e3e 1419
7ff03255 1420 write_to_stderr(message, msglen);
f86702cc 1421 my_failure_exit();
a687059c
LW		 1422}
1423
c5be433b 1424#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1425void
cea2e8a9 1426Perl_croak_nocontext(const char *pat, ...)
a687059c 1427{
cea2e8a9 1428 dTHX;
a687059c 1429 va_list args;
cea2e8a9 1430 va_start(args, pat);
c5be433b 1431 vcroak(pat, &args);
cea2e8a9
GS		 1432 /* NOTREACHED */
1433 va_end(args);
1434}
1435#endif /* PERL_IMPLICIT_CONTEXT */
1436
954c1994 1437/*
ccfc67b7
JH		 1438=head1 Warning and Dieing
1439
954c1994
GS		 1440=for apidoc croak
1441
9983fa3c 1442This is the XSUB-writer's interface to Perl's C<die> function.
966353fd
MF		 1443Normally call this function the same way you call the C C<printf>
1444function. Calling C<croak> returns control directly to Perl,
1445sidestepping the normal C order of execution. See C<warn>.
9983fa3c
GS		 1446
1447If you want to throw an exception object, assign the object to
bd61b366 1448C<$@> and then pass C<NULL> to croak():
9983fa3c 1449
64ace3f8 1450 errsv = get_sv("@", GV_ADD);
9983fa3c 1451 sv_setsv(errsv, exception_object);
bd61b366 1452 croak(NULL);
954c1994
GS		 1453
1454=cut
1455*/
1456
cea2e8a9
GS		 1457void
1458Perl_croak(pTHX_ const char *pat, ...)
1459{
1460 va_list args;
1461 va_start(args, pat);
c5be433b 1462 vcroak(pat, &args);
cea2e8a9
GS		 1463 /* NOTREACHED */
1464 va_end(args);
1465}
1466
c5be433b
GS		 1467void
1468Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1469{
27da23d5 1470 dVAR;
06bf62c7 1471 STRLEN msglen;
53c1dcc0
AL		 1472 SV * const msv = vmess(pat, args);
1473 const I32 utf8 = SvUTF8(msv);
1474 const char * const message = SvPV_const(msv, msglen);
a687059c 1475
7918f24d
NC		 1476 PERL_ARGS_ASSERT_VWARN;
1477
3280af22 1478 if (PL_warnhook) {
46d9c920 1479 if (vdie_common(message, msglen, utf8, TRUE))
20cec16a 1480 return;
748a9306 1481 }
87582a92 1482
7ff03255 1483 write_to_stderr(message, msglen);
a687059c 1484}
8d063cd8 1485
c5be433b 1486#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1487void
1488Perl_warn_nocontext(const char *pat, ...)
1489{
1490 dTHX;
1491 va_list args;
7918f24d 1492 PERL_ARGS_ASSERT_WARN_NOCONTEXT;
cea2e8a9 1493 va_start(args, pat);
c5be433b 1494 vwarn(pat, &args);
cea2e8a9
GS		 1495 va_end(args);
1496}
1497#endif /* PERL_IMPLICIT_CONTEXT */
1498
954c1994
GS		 1499/*
1500=for apidoc warn
1501
966353fd
MF		 1502This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1503function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS		 1504
1505=cut
1506*/
1507
cea2e8a9
GS		 1508void
1509Perl_warn(pTHX_ const char *pat, ...)
1510{
1511 va_list args;
7918f24d 1512 PERL_ARGS_ASSERT_WARN;
cea2e8a9 1513 va_start(args, pat);
c5be433b 1514 vwarn(pat, &args);
cea2e8a9
GS		 1515 va_end(args);
1516}
1517
c5be433b
GS		 1518#if defined(PERL_IMPLICIT_CONTEXT)
1519void
1520Perl_warner_nocontext(U32 err, const char *pat, ...)
1521{
27da23d5 1522 dTHX;
c5be433b 1523 va_list args;
7918f24d 1524 PERL_ARGS_ASSERT_WARNER_NOCONTEXT;
c5be433b
GS		 1525 va_start(args, pat);
1526 vwarner(err, pat, &args);
1527 va_end(args);
1528}
1529#endif /* PERL_IMPLICIT_CONTEXT */
1530
599cee73 1531void
864dbfa3 1532Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM		 1533{
1534 va_list args;
7918f24d 1535 PERL_ARGS_ASSERT_WARNER;
c5be433b
GS		 1536 va_start(args, pat);
1537 vwarner(err, pat, &args);
1538 va_end(args);
1539}
1540
1541void
1542Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1543{
27da23d5 1544 dVAR;
7918f24d 1545 PERL_ARGS_ASSERT_VWARNER;
5f2d9966 1546 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
a3b680e6 1547 SV * const msv = vmess(pat, args);
d13b0d77 1548 STRLEN msglen;
7452cf6a 1549 const char * const message = SvPV_const(msv, msglen);
a3b680e6 1550 const I32 utf8 = SvUTF8(msv);
599cee73 1551
3aed30dc 1552 if (PL_diehook) {
63315e18 1553 assert(message);
46d9c920 1554 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
3aed30dc
HS		 1555 }
1556 if (PL_in_eval) {
1557 PL_restartop = die_where(message, msglen);
ff882698 1558 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS		 1559 JMPENV_JUMP(3);
1560 }
7ff03255 1561 write_to_stderr(message, msglen);
3aed30dc 1562 my_failure_exit();
599cee73
PM		 1563 }
1564 else {
d13b0d77 1565 Perl_vwarn(aTHX_ pat, args);
599cee73
PM		 1566 }
1567}
1568
f54ba1c2
DM		 1569/* implements the ckWARN? macros */
1570
1571bool
1572Perl_ckwarn(pTHX_ U32 w)
1573{
97aff369 1574 dVAR;
f8279d10
NC		 1575 return isLEXWARN_on
1576 ? (PL_curcop->cop_warnings != pWARN_NONE
1577 && (
f54ba1c2
DM		 1578 PL_curcop->cop_warnings == pWARN_ALL
1579 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1580 || (unpackWARN2(w) &&
1581 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1582 || (unpackWARN3(w) &&
1583 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1584 || (unpackWARN4(w) &&
1585 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1586 )
f8279d10
NC		 1587 )
1588 : (PL_dowarn & G_WARN_ON);
f54ba1c2
DM		 1589}
1590
1591/* implements the ckWARN?_d macro */
1592
1593bool
1594Perl_ckwarn_d(pTHX_ U32 w)
1595{
97aff369 1596 dVAR;
f54ba1c2
DM		 1597 return
1598 isLEXWARN_off
1599 || PL_curcop->cop_warnings == pWARN_ALL
1600 || (
1601 PL_curcop->cop_warnings != pWARN_NONE
1602 && (
1603 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1604 || (unpackWARN2(w) &&
1605 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1606 || (unpackWARN3(w) &&
1607 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1608 || (unpackWARN4(w) &&
1609 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1610 )
1611 )
1612 ;
1613}
1614
72dc9ed5
NC		 1615/* Set buffer=NULL to get a new one. */
1616STRLEN *
8ee4cf24 1617Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
72dc9ed5
NC		 1618 STRLEN size) {
1619 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
35da51f7 1620 PERL_UNUSED_CONTEXT;
7918f24d 1621 PERL_ARGS_ASSERT_NEW_WARNINGS_BITFIELD;
72dc9ed5 1622
10edeb5d
JH		 1623 buffer = (STRLEN*)
1624 (specialWARN(buffer) ?
1625 PerlMemShared_malloc(len_wanted) :
1626 PerlMemShared_realloc(buffer, len_wanted));
72dc9ed5
NC		 1627 buffer[0] = size;
1628 Copy(bits, (buffer + 1), size, char);
1629 return buffer;
1630}
f54ba1c2 1631
e6587932
DM		 1632/* since we've already done strlen() for both nam and val
1633 * we can use that info to make things faster than
1634 * sprintf(s, "%s=%s", nam, val)
1635 */
1636#define my_setenv_format(s, nam, nlen, val, vlen) \
1637 Copy(nam, s, nlen, char); \
1638 *(s+nlen) = '='; \
1639 Copy(val, s+(nlen+1), vlen, char); \
1640 *(s+(nlen+1+vlen)) = '\0'
1641
c5d12488
JH		 1642#ifdef USE_ENVIRON_ARRAY
1643 /* VMS' my_setenv() is in vms.c */
1644#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1645void
e1ec3a88 1646Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1647{
27da23d5 1648 dVAR;
4efc5df6
GS		 1649#ifdef USE_ITHREADS
1650 /* only parent thread can modify process environment */
1651 if (PL_curinterp == aTHX)
1652#endif
1653 {
f2517201 1654#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1655 if (!PL_use_safe_putenv) {
c5d12488 1656 /* most putenv()s leak, so we manipulate environ directly */
3a9222be
JH		 1657 register I32 i;
1658 register const I32 len = strlen(nam);
c5d12488
JH		 1659 int nlen, vlen;
1660
3a9222be
JH		 1661 /* where does it go? */
1662 for (i = 0; environ[i]; i++) {
1663 if (strnEQ(environ[i],nam,len) && environ[i][len] == '=')
1664 break;
1665 }
1666
c5d12488
JH		 1667 if (environ == PL_origenviron) { /* need we copy environment? */
1668 I32 j;
1669 I32 max;
1670 char **tmpenv;
1671
1672 max = i;
1673 while (environ[max])
1674 max++;
1675 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1676 for (j=0; j<max; j++) { /* copy environment */
1677 const int len = strlen(environ[j]);
1678 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1679 Copy(environ[j], tmpenv[j], len+1, char);
1680 }
1681 tmpenv[max] = NULL;
1682 environ = tmpenv; /* tell exec where it is now */
1683 }
1684 if (!val) {
1685 safesysfree(environ[i]);
1686 while (environ[i]) {
1687 environ[i] = environ[i+1];
1688 i++;
a687059c 1689 }
c5d12488
JH		 1690 return;
1691 }
1692 if (!environ[i]) { /* does not exist yet */
1693 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1694 environ[i+1] = NULL; /* make sure it's null terminated */
1695 }
1696 else
1697 safesysfree(environ[i]);
1698 nlen = strlen(nam);
1699 vlen = strlen(val);
1700
1701 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1702 /* all that work just for this */
1703 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95 1704 } else {
c5d12488 1705# endif
7ee146b1 1706# if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
88f5bc07
AB		 1707# if defined(HAS_UNSETENV)
1708 if (val == NULL) {
1709 (void)unsetenv(nam);
1710 } else {
1711 (void)setenv(nam, val, 1);
1712 }
1713# else /* ! HAS_UNSETENV */
1714 (void)setenv(nam, val, 1);
1715# endif /* HAS_UNSETENV */
47dafe4d 1716# else
88f5bc07
AB		 1717# if defined(HAS_UNSETENV)
1718 if (val == NULL) {
1719 (void)unsetenv(nam);
1720 } else {
c4420975
AL		 1721 const int nlen = strlen(nam);
1722 const int vlen = strlen(val);
1723 char * const new_env =
88f5bc07
AB		 1724 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1725 my_setenv_format(new_env, nam, nlen, val, vlen);
1726 (void)putenv(new_env);
1727 }
1728# else /* ! HAS_UNSETENV */
1729 char *new_env;
c4420975
AL		 1730 const int nlen = strlen(nam);
1731 int vlen;
88f5bc07
AB		 1732 if (!val) {
1733 val = "";
1734 }
1735 vlen = strlen(val);
1736 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1737 /* all that work just for this */
1738 my_setenv_format(new_env, nam, nlen, val, vlen);
1739 (void)putenv(new_env);
1740# endif /* HAS_UNSETENV */
47dafe4d 1741# endif /* __CYGWIN__ */
50acdf95
MS		 1742#ifndef PERL_USE_SAFE_PUTENV
1743 }
1744#endif
4efc5df6 1745 }
8d063cd8
LW		 1746}
1747
c5d12488 1748#else /* WIN32 || NETWARE */
68dc0745 1749
1750void
72229eff 1751Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1752{
27da23d5 1753 dVAR;
c5d12488
JH		 1754 register char *envstr;
1755 const int nlen = strlen(nam);
1756 int vlen;
e6587932 1757
c5d12488
JH		 1758 if (!val) {
1759 val = "";
ac5c734f 1760 }
c5d12488
JH		 1761 vlen = strlen(val);
1762 Newx(envstr, nlen+vlen+2, char);
1763 my_setenv_format(envstr, nam, nlen, val, vlen);
1764 (void)PerlEnv_putenv(envstr);
1765 Safefree(envstr);
3e3baf6d
TB		 1766}
1767
c5d12488 1768#endif /* WIN32 || NETWARE */
3e3baf6d 1769
c5d12488 1770#endif /* !VMS && !EPOC*/
378cc40b 1771
16d20bd9 1772#ifdef UNLINK_ALL_VERSIONS
79072805 1773I32
6e732051 1774Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 1775{
35da51f7 1776 I32 retries = 0;
378cc40b 1777
7918f24d
NC		 1778 PERL_ARGS_ASSERT_UNLNK;
1779
35da51f7
AL		 1780 while (PerlLIO_unlink(f) >= 0)
1781 retries++;
1782 return retries ? 0 : -1;
378cc40b
LW		 1783}
1784#endif
1785
7a3f2258 1786/* this is a drop-in replacement for bcopy() */
2253333f 1787#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1788char *
7a3f2258 1789Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b 1790{
2d03de9c 1791 char * const retval = to;
378cc40b 1792
7918f24d
NC		 1793 PERL_ARGS_ASSERT_MY_BCOPY;
1794
7c0587c8
LW		 1795 if (from - to >= 0) {
1796 while (len--)
1797 *to++ = *from++;
1798 }
1799 else {
1800 to += len;
1801 from += len;
1802 while (len--)
faf8582f 1803 *(--to) = *(--from);
7c0587c8 1804 }
378cc40b
LW		 1805 return retval;
1806}
ffed7fef 1807#endif
378cc40b 1808
7a3f2258 1809/* this is a drop-in replacement for memset() */
fc36a67e 1810#ifndef HAS_MEMSET
1811void *
7a3f2258 1812Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1813{
2d03de9c 1814 char * const retval = loc;
fc36a67e 1815
7918f24d
NC		 1816 PERL_ARGS_ASSERT_MY_MEMSET;
1817
fc36a67e 1818 while (len--)
1819 *loc++ = ch;
1820 return retval;
1821}
1822#endif
1823
7a3f2258 1824/* this is a drop-in replacement for bzero() */
7c0587c8 1825#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1826char *
7a3f2258 1827Perl_my_bzero(register char *loc, register I32 len)
378cc40b 1828{
2d03de9c 1829 char * const retval = loc;
378cc40b 1830
7918f24d
NC		 1831 PERL_ARGS_ASSERT_MY_BZERO;
1832
378cc40b
LW		 1833 while (len--)
1834 *loc++ = 0;
1835 return retval;
1836}
1837#endif
7c0587c8 1838
7a3f2258 1839/* this is a drop-in replacement for memcmp() */
36477c24 1840#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1841I32
7a3f2258 1842Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1843{
e1ec3a88
AL		 1844 register const U8 *a = (const U8 *)s1;
1845 register const U8 *b = (const U8 *)s2;
79072805 1846 register I32 tmp;
7c0587c8 1847
7918f24d
NC		 1848 PERL_ARGS_ASSERT_MY_MEMCMP;
1849
7c0587c8 1850 while (len--) {
27da23d5 1851 if ((tmp = *a++ - *b++))
7c0587c8
LW		 1852 return tmp;
1853 }
1854 return 0;
1855}
36477c24 1856#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1857
fe14fcc3 1858#ifndef HAS_VPRINTF
d05d9be5
AD		 1859/* This vsprintf replacement should generally never get used, since
1860 vsprintf was available in both System V and BSD 2.11. (There may
1861 be some cross-compilation or embedded set-ups where it is needed,
1862 however.)
1863
1864 If you encounter a problem in this function, it's probably a symptom
1865 that Configure failed to detect your system's vprintf() function.
1866 See the section on "item vsprintf" in the INSTALL file.
1867
1868 This version may compile on systems with BSD-ish <stdio.h>,
1869 but probably won't on others.
1870*/
a687059c 1871
85e6fe83 1872#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1873char *
1874#else
1875int
1876#endif
d05d9be5 1877vsprintf(char *dest, const char *pat, void *args)
a687059c
LW		 1878{
1879 FILE fakebuf;
1880
d05d9be5
AD		 1881#if defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
1882 FILE_ptr(&fakebuf) = (STDCHAR *) dest;
1883 FILE_cnt(&fakebuf) = 32767;
1884#else
1885 /* These probably won't compile -- If you really need
1886 this, you'll have to figure out some other method. */
a687059c
LW		 1887 fakebuf._ptr = dest;
1888 fakebuf._cnt = 32767;
d05d9be5 1889#endif
35c8bce7
LW		 1890#ifndef _IOSTRG
1891#define _IOSTRG 0
1892#endif
a687059c
LW		 1893 fakebuf._flag = _IOWRT|_IOSTRG;
1894 _doprnt(pat, args, &fakebuf); /* what a kludge */
d05d9be5
AD		 1895#if defined(STDIO_PTR_LVALUE)
1896 *(FILE_ptr(&fakebuf)++) = '\0';
1897#else
1898 /* PerlIO has probably #defined away fputc, but we want it here. */
1899# ifdef fputc
1900# undef fputc /* XXX Should really restore it later */
1901# endif
1902 (void)fputc('\0', &fakebuf);
1903#endif
85e6fe83 1904#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1905 return(dest);
1906#else
1907 return 0; /* perl doesn't use return value */
1908#endif
1909}
1910
fe14fcc3 1911#endif /* HAS_VPRINTF */
a687059c
LW		 1912
1913#ifdef MYSWAP
ffed7fef 1914#if BYTEORDER != 0x4321
a687059c 1915short
864dbfa3 1916Perl_my_swap(pTHX_ short s)
a687059c
LW		 1917{
1918#if (BYTEORDER & 1) == 0
1919 short result;
1920
1921 result = ((s & 255) << 8) + ((s >> 8) & 255);
1922 return result;
1923#else
1924 return s;
1925#endif
1926}
1927
1928long
864dbfa3 1929Perl_my_htonl(pTHX_ long l)
a687059c
LW		 1930{
1931 union {
1932 long result;
ffed7fef 1933 char c[sizeof(long)];
a687059c
LW		 1934 } u;
1935
cef6ea9d
JH		 1936#if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
1937#if BYTEORDER == 0x12345678
1938 u.result = 0;
1939#endif
a687059c
LW		 1940 u.c[0] = (l >> 24) & 255;
1941 u.c[1] = (l >> 16) & 255;
1942 u.c[2] = (l >> 8) & 255;
1943 u.c[3] = l & 255;
1944 return u.result;
1945#else
ffed7fef 1946#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1947 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1948#else
79072805
LW		 1949 register I32 o;
1950 register I32 s;
a687059c 1951
ffed7fef
LW		 1952 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1953 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 1954 }
1955 return u.result;
1956#endif
1957#endif
1958}
1959
1960long
864dbfa3 1961Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 1962{
1963 union {
1964 long l;
ffed7fef 1965 char c[sizeof(long)];
a687059c
LW		 1966 } u;
1967
ffed7fef 1968#if BYTEORDER == 0x1234
a687059c
LW		 1969 u.c[0] = (l >> 24) & 255;
1970 u.c[1] = (l >> 16) & 255;
1971 u.c[2] = (l >> 8) & 255;
1972 u.c[3] = l & 255;
1973 return u.l;
1974#else
ffed7fef 1975#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1976 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1977#else
79072805
LW		 1978 register I32 o;
1979 register I32 s;
a687059c
LW		 1980
1981 u.l = l;
1982 l = 0;
ffed7fef
LW		 1983 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1984 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 1985 }
1986 return l;
1987#endif
1988#endif
1989}
1990
ffed7fef 1991#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 1992#endif /* MYSWAP */
1993
1994/*
1995 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1996 * If these functions are defined,
1997 * the BYTEORDER is neither 0x1234 nor 0x4321.
1998 * However, this is not assumed.
1999 * -DWS
2000 */
2001
1109a392 2002#define HTOLE(name,type) \
988174c1 2003 type \
ba106d47 2004 name (register type n) \
988174c1
LW		 2005 { \
2006 union { \
2007 type value; \
2008 char c[sizeof(type)]; \
2009 } u; \
bb7a0f54
MHM		 2010 register U32 i; \
2011 register U32 s = 0; \
1109a392 2012 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW		 2013 u.c[i] = (n >> s) & 0xFF; \
2014 } \
2015 return u.value; \
2016 }
2017
1109a392 2018#define LETOH(name,type) \
988174c1 2019 type \
ba106d47 2020 name (register type n) \
988174c1
LW		 2021 { \
2022 union { \
2023 type value; \
2024 char c[sizeof(type)]; \
2025 } u; \
bb7a0f54
MHM		 2026 register U32 i; \
2027 register U32 s = 0; \
988174c1
LW		 2028 u.value = n; \
2029 n = 0; \
1109a392
MHM		 2030 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
2031 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW		 2032 } \
2033 return n; \
2034 }
2035
1109a392
MHM		 2036/*
2037 * Big-endian byte order functions.
2038 */
2039
2040#define HTOBE(name,type) \
2041 type \
2042 name (register type n) \
2043 { \
2044 union { \
2045 type value; \
2046 char c[sizeof(type)]; \
2047 } u; \
bb7a0f54
MHM		 2048 register U32 i; \
2049 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM		 2050 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2051 u.c[i] = (n >> s) & 0xFF; \
2052 } \
2053 return u.value; \
2054 }
2055
2056#define BETOH(name,type) \
2057 type \
2058 name (register type n) \
2059 { \
2060 union { \
2061 type value; \
2062 char c[sizeof(type)]; \
2063 } u; \
bb7a0f54
MHM		 2064 register U32 i; \
2065 register U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM		 2066 u.value = n; \
2067 n = 0; \
2068 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2069 n |= ((type)(u.c[i] & 0xFF)) << s; \
2070 } \
2071 return n; \
2072 }
2073
2074/*
2075 * If we just can't do it...
2076 */
2077
2078#define NOT_AVAIL(name,type) \
2079 type \
2080 name (register type n) \
2081 { \
2082 Perl_croak_nocontext(#name "() not available"); \
2083 return n; /* not reached */ \
2084 }
2085
2086
988174c1 2087#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 2088HTOLE(htovs,short)
988174c1
LW		 2089#endif
2090#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 2091HTOLE(htovl,long)
988174c1
LW		 2092#endif
2093#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 2094LETOH(vtohs,short)
988174c1
LW		 2095#endif
2096#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM		 2097LETOH(vtohl,long)
2098#endif
2099
2100#ifdef PERL_NEED_MY_HTOLE16
2101# if U16SIZE == 2
2102HTOLE(Perl_my_htole16,U16)
2103# else
2104NOT_AVAIL(Perl_my_htole16,U16)
2105# endif
2106#endif
2107#ifdef PERL_NEED_MY_LETOH16
2108# if U16SIZE == 2
2109LETOH(Perl_my_letoh16,U16)
2110# else
2111NOT_AVAIL(Perl_my_letoh16,U16)
2112# endif
2113#endif
2114#ifdef PERL_NEED_MY_HTOBE16
2115# if U16SIZE == 2
2116HTOBE(Perl_my_htobe16,U16)
2117# else
2118NOT_AVAIL(Perl_my_htobe16,U16)
2119# endif
2120#endif
2121#ifdef PERL_NEED_MY_BETOH16
2122# if U16SIZE == 2
2123BETOH(Perl_my_betoh16,U16)
2124# else
2125NOT_AVAIL(Perl_my_betoh16,U16)
2126# endif
2127#endif
2128
2129#ifdef PERL_NEED_MY_HTOLE32
2130# if U32SIZE == 4
2131HTOLE(Perl_my_htole32,U32)
2132# else
2133NOT_AVAIL(Perl_my_htole32,U32)
2134# endif
2135#endif
2136#ifdef PERL_NEED_MY_LETOH32
2137# if U32SIZE == 4
2138LETOH(Perl_my_letoh32,U32)
2139# else
2140NOT_AVAIL(Perl_my_letoh32,U32)
2141# endif
2142#endif
2143#ifdef PERL_NEED_MY_HTOBE32
2144# if U32SIZE == 4
2145HTOBE(Perl_my_htobe32,U32)
2146# else
2147NOT_AVAIL(Perl_my_htobe32,U32)
2148# endif
2149#endif
2150#ifdef PERL_NEED_MY_BETOH32
2151# if U32SIZE == 4
2152BETOH(Perl_my_betoh32,U32)
2153# else
2154NOT_AVAIL(Perl_my_betoh32,U32)
2155# endif
2156#endif
2157
2158#ifdef PERL_NEED_MY_HTOLE64
2159# if U64SIZE == 8
2160HTOLE(Perl_my_htole64,U64)
2161# else
2162NOT_AVAIL(Perl_my_htole64,U64)
2163# endif
2164#endif
2165#ifdef PERL_NEED_MY_LETOH64
2166# if U64SIZE == 8
2167LETOH(Perl_my_letoh64,U64)
2168# else
2169NOT_AVAIL(Perl_my_letoh64,U64)
2170# endif
2171#endif
2172#ifdef PERL_NEED_MY_HTOBE64
2173# if U64SIZE == 8
2174HTOBE(Perl_my_htobe64,U64)
2175# else
2176NOT_AVAIL(Perl_my_htobe64,U64)
2177# endif
2178#endif
2179#ifdef PERL_NEED_MY_BETOH64
2180# if U64SIZE == 8
2181BETOH(Perl_my_betoh64,U64)
2182# else
2183NOT_AVAIL(Perl_my_betoh64,U64)
2184# endif
988174c1 2185#endif
a687059c 2186
1109a392
MHM		 2187#ifdef PERL_NEED_MY_HTOLES
2188HTOLE(Perl_my_htoles,short)
2189#endif
2190#ifdef PERL_NEED_MY_LETOHS
2191LETOH(Perl_my_letohs,short)
2192#endif
2193#ifdef PERL_NEED_MY_HTOBES
2194HTOBE(Perl_my_htobes,short)
2195#endif
2196#ifdef PERL_NEED_MY_BETOHS
2197BETOH(Perl_my_betohs,short)
2198#endif
2199
2200#ifdef PERL_NEED_MY_HTOLEI
2201HTOLE(Perl_my_htolei,int)
2202#endif
2203#ifdef PERL_NEED_MY_LETOHI
2204LETOH(Perl_my_letohi,int)
2205#endif
2206#ifdef PERL_NEED_MY_HTOBEI
2207HTOBE(Perl_my_htobei,int)
2208#endif
2209#ifdef PERL_NEED_MY_BETOHI
2210BETOH(Perl_my_betohi,int)
2211#endif
2212
2213#ifdef PERL_NEED_MY_HTOLEL
2214HTOLE(Perl_my_htolel,long)
2215#endif
2216#ifdef PERL_NEED_MY_LETOHL
2217LETOH(Perl_my_letohl,long)
2218#endif
2219#ifdef PERL_NEED_MY_HTOBEL
2220HTOBE(Perl_my_htobel,long)
2221#endif
2222#ifdef PERL_NEED_MY_BETOHL
2223BETOH(Perl_my_betohl,long)
2224#endif
2225
2226void
2227Perl_my_swabn(void *ptr, int n)
2228{
2229 register char *s = (char *)ptr;
2230 register char *e = s + (n-1);
2231 register char tc;
2232
7918f24d
NC		 2233 PERL_ARGS_ASSERT_MY_SWABN;
2234
1109a392
MHM		 2235 for (n /= 2; n > 0; s++, e--, n--) {
2236 tc = *s;
2237 *s = *e;
2238 *e = tc;
2239 }
2240}
2241
4a7d1889 2242PerlIO *
c9289b7b 2243Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args)
4a7d1889 2244{
e37778c2 2245#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__)
97aff369 2246 dVAR;
1f852d0d
NIS		 2247 int p[2];
2248 register I32 This, that;
2249 register Pid_t pid;
2250 SV *sv;
2251 I32 did_pipes = 0;
2252 int pp[2];
2253
7918f24d
NC		 2254 PERL_ARGS_ASSERT_MY_POPEN_LIST;
2255
1f852d0d
NIS		 2256 PERL_FLUSHALL_FOR_CHILD;
2257 This = (*mode == 'w');
2258 that = !This;
2259 if (PL_tainting) {
2260 taint_env();
2261 taint_proper("Insecure %s%s", "EXEC");
2262 }
2263 if (PerlProc_pipe(p) < 0)
4608196e 2264 return NULL;
1f852d0d
NIS		 2265 /* Try for another pipe pair for error return */
2266 if (PerlProc_pipe(pp) >= 0)
2267 did_pipes = 1;
52e18b1f 2268 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS		 2269 if (errno != EAGAIN) {
2270 PerlLIO_close(p[This]);
4e6dfe71 2271 PerlLIO_close(p[that]);
1f852d0d
NIS		 2272 if (did_pipes) {
2273 PerlLIO_close(pp[0]);
2274 PerlLIO_close(pp[1]);
2275 }
4608196e 2276 return NULL;
1f852d0d 2277 }
b3647a36
SR		 2278 if (ckWARN(WARN_PIPE))
2279 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds");
1f852d0d
NIS		 2280 sleep(5);
2281 }
2282 if (pid == 0) {
2283 /* Child */
1f852d0d
NIS		 2284#undef THIS
2285#undef THAT
2286#define THIS that
2287#define THAT This
1f852d0d
NIS		 2288 /* Close parent's end of error status pipe (if any) */
2289 if (did_pipes) {
2290 PerlLIO_close(pp[0]);
2291#if defined(HAS_FCNTL) && defined(F_SETFD)
2292 /* Close error pipe automatically if exec works */
2293 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2294#endif
2295 }
2296 /* Now dup our end of _the_ pipe to right position */
2297 if (p[THIS] != (*mode == 'r')) {
2298 PerlLIO_dup2(p[THIS], *mode == 'r');
2299 PerlLIO_close(p[THIS]);
4e6dfe71
GS		 2300 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2301 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2302 }
4e6dfe71
GS		 2303 else
2304 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS		 2305#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2306 /* No automatic close - do it by hand */
b7953727
JH		 2307# ifndef NOFILE
2308# define NOFILE 20
2309# endif
a080fe3d
NIS		 2310 {
2311 int fd;
2312
2313 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2314 if (fd != pp[1])
a080fe3d
NIS		 2315 PerlLIO_close(fd);
2316 }
1f852d0d
NIS		 2317 }
2318#endif
a0714e2c 2319 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
1f852d0d
NIS		 2320 PerlProc__exit(1);
2321#undef THIS
2322#undef THAT
2323 }
2324 /* Parent */
52e18b1f 2325 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS		 2326 if (did_pipes)
2327 PerlLIO_close(pp[1]);
2328 /* Keep the lower of the two fd numbers */
2329 if (p[that] < p[This]) {
2330 PerlLIO_dup2(p[This], p[that]);
2331 PerlLIO_close(p[This]);
2332 p[This] = p[that];
2333 }
4e6dfe71
GS		 2334 else
2335 PerlLIO_close(p[that]); /* close child's end of pipe */
2336
1f852d0d 2337 sv = *av_fetch(PL_fdpid,p[This],TRUE);
862a34c6 2338 SvUPGRADE(sv,SVt_IV);
45977657 2339 SvIV_set(sv, pid);
1f852d0d
NIS		 2340 PL_forkprocess = pid;
2341 /* If we managed to get status pipe check for exec fail */
2342 if (did_pipes && pid > 0) {
2343 int errkid;
bb7a0f54
MHM		 2344 unsigned n = 0;
2345 SSize_t n1;
1f852d0d
NIS		 2346
2347 while (n < sizeof(int)) {
2348 n1 = PerlLIO_read(pp[0],
2349 (void*)(((char*)&errkid)+n),
2350 (sizeof(int)) - n);
2351 if (n1 <= 0)
2352 break;
2353 n += n1;
2354 }
2355 PerlLIO_close(pp[0]);
2356 did_pipes = 0;
2357 if (n) { /* Error */
2358 int pid2, status;
8c51524e 2359 PerlLIO_close(p[This]);
1f852d0d
NIS		 2360 if (n != sizeof(int))
2361 Perl_croak(aTHX_ "panic: kid popen errno read");
2362 do {
2363 pid2 = wait4pid(pid, &status, 0);
2364 } while (pid2 == -1 && errno == EINTR);
2365 errno = errkid; /* Propagate errno from kid */
4608196e 2366 return NULL;
1f852d0d
NIS		 2367 }
2368 }
2369 if (did_pipes)
2370 PerlLIO_close(pp[0]);
2371 return PerlIO_fdopen(p[This], mode);
2372#else
9d419b5f 2373# ifdef OS2 /* Same, without fork()ing and all extra overhead... */
4e205ed6 2374 return my_syspopen4(aTHX_ NULL, mode, n, args);
9d419b5f 2375# else
4a7d1889
NIS		 2376 Perl_croak(aTHX_ "List form of piped open not implemented");
2377 return (PerlIO *) NULL;
9d419b5f 2378# endif
1f852d0d 2379#endif
4a7d1889
NIS		 2380}
2381
5f05dabc 2382 /* VMS' my_popen() is in VMS.c, same with OS/2. */
e37778c2 2383#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(__LIBCATAMOUNT__)
760ac839 2384PerlIO *
3dd43144 2385Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c 2386{
97aff369 2387 dVAR;
a687059c 2388 int p[2];
8ac85365 2389 register I32 This, that;
d8a83dd3 2390 register Pid_t pid;
79072805 2391 SV *sv;
bfce84ec 2392 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ		 2393 I32 did_pipes = 0;
2394 int pp[2];
a687059c 2395
7918f24d
NC		 2396 PERL_ARGS_ASSERT_MY_POPEN;
2397
45bc9206 2398 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2399#ifdef OS2
2400 if (doexec) {
23da6c43 2401 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2402 }
a1d180c4 2403#endif
8ac85365
NIS		 2404 This = (*mode == 'w');
2405 that = !This;
3280af22 2406 if (doexec && PL_tainting) {
bbce6d69 2407 taint_env();
2408 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2409 }
c2267164 2410 if (PerlProc_pipe(p) < 0)
4608196e 2411 return NULL;
e446cec8
IZ		 2412 if (doexec && PerlProc_pipe(pp) >= 0)
2413 did_pipes = 1;
52e18b1f 2414 while ((pid = PerlProc_fork()) < 0) {
a687059c 2415 if (errno != EAGAIN) {
6ad3d225 2416 PerlLIO_close(p[This]);
b5ac89c3 2417 PerlLIO_close(p[that]);
e446cec8
IZ		 2418 if (did_pipes) {
2419 PerlLIO_close(pp[0]);
2420 PerlLIO_close(pp[1]);
2421 }
a687059c 2422 if (!doexec)
b3647a36 2423 Perl_croak(aTHX_ "Can't fork: %s", Strerror(errno));
4608196e 2424 return NULL;
a687059c 2425 }
b3647a36
SR		 2426 if (ckWARN(WARN_PIPE))
2427 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds");
a687059c
LW		 2428 sleep(5);
2429 }
2430 if (pid == 0) {
79072805
LW		 2431 GV* tmpgv;
2432
30ac6d9b
GS		 2433#undef THIS
2434#undef THAT
a687059c 2435#define THIS that
8ac85365 2436#define THAT This
e446cec8
IZ		 2437 if (did_pipes) {
2438 PerlLIO_close(pp[0]);
2439#if defined(HAS_FCNTL) && defined(F_SETFD)
2440 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2441#endif
2442 }
a687059c 2443 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2444 PerlLIO_dup2(p[THIS], *mode == 'r');
2445 PerlLIO_close(p[THIS]);
b5ac89c3
NIS		 2446 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2447 PerlLIO_close(p[THAT]);
a687059c 2448 }
b5ac89c3
NIS		 2449 else
2450 PerlLIO_close(p[THAT]);
4435c477 2451#ifndef OS2
a687059c 2452 if (doexec) {
a0d0e21e 2453#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2454#ifndef NOFILE
2455#define NOFILE 20
2456#endif
a080fe3d 2457 {
3aed30dc 2458 int fd;
a080fe3d
NIS		 2459
2460 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2461 if (fd != pp[1])
3aed30dc 2462 PerlLIO_close(fd);
a080fe3d 2463 }
ae986130 2464#endif
a080fe3d
NIS		 2465 /* may or may not use the shell */
2466 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2467 PerlProc__exit(1);
a687059c 2468 }
4435c477 2469#endif /* defined OS2 */
713cef20
IZ		 2470
2471#ifdef PERLIO_USING_CRLF
2472 /* Since we circumvent IO layers when we manipulate low-level
2473 filedescriptors directly, need to manually switch to the
2474 default, binary, low-level mode; see PerlIOBuf_open(). */
2475 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2476#endif
2477
fafc274c 2478 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4d76a344 2479 SvREADONLY_off(GvSV(tmpgv));
7766f137 2480 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS		 2481 SvREADONLY_on(GvSV(tmpgv));
2482 }
2483#ifdef THREADS_HAVE_PIDS
2484 PL_ppid = (IV)getppid();
2485#endif
3280af22 2486 PL_forkprocess = 0;
ca0c25f6 2487#ifdef PERL_USES_PL_PIDSTATUS
3280af22 2488 hv_clear(PL_pidstatus); /* we have no children */
ca0c25f6 2489#endif
4608196e 2490 return NULL;
a687059c
LW		 2491#undef THIS
2492#undef THAT
2493 }
b5ac89c3 2494 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ		 2495 if (did_pipes)
2496 PerlLIO_close(pp[1]);
8ac85365 2497 if (p[that] < p[This]) {
6ad3d225
GS		 2498 PerlLIO_dup2(p[This], p[that]);
2499 PerlLIO_close(p[This]);
8ac85365 2500 p[This] = p[that];
62b28dd9 2501 }
b5ac89c3
NIS		 2502 else
2503 PerlLIO_close(p[that]);
2504
3280af22 2505 sv = *av_fetch(PL_fdpid,p[This],TRUE);
862a34c6 2506 SvUPGRADE(sv,SVt_IV);
45977657 2507 SvIV_set(sv, pid);
3280af22 2508 PL_forkprocess = pid;
e446cec8
IZ		 2509 if (did_pipes && pid > 0) {
2510 int errkid;
bb7a0f54
MHM		 2511 unsigned n = 0;
2512 SSize_t n1;
e446cec8
IZ		 2513
2514 while (n < sizeof(int)) {
2515 n1 = PerlLIO_read(pp[0],
2516 (void*)(((char*)&errkid)+n),
2517 (sizeof(int)) - n);
2518 if (n1 <= 0)
2519 break;
2520 n += n1;
2521 }
2f96c702
IZ		 2522 PerlLIO_close(pp[0]);
2523 did_pipes = 0;
e446cec8 2524 if (n) { /* Error */
faa466a7 2525 int pid2, status;
8c51524e 2526 PerlLIO_close(p[This]);
e446cec8 2527 if (n != sizeof(int))
cea2e8a9 2528 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG		 2529 do {
2530 pid2 = wait4pid(pid, &status, 0);
2531 } while (pid2 == -1 && errno == EINTR);
e446cec8 2532 errno = errkid; /* Propagate errno from kid */
4608196e 2533 return NULL;
e446cec8
IZ		 2534 }
2535 }
2536 if (did_pipes)
2537 PerlLIO_close(pp[0]);
8ac85365 2538 return PerlIO_fdopen(p[This], mode);
a687059c 2539}
7c0587c8 2540#else
85ca448a 2541#if defined(atarist) || defined(EPOC)
7c0587c8 2542FILE *popen();
760ac839 2543PerlIO *
cef6ea9d 2544Perl_my_popen(pTHX_ const char *cmd, const char *mode)
7c0587c8 2545{
7918f24d 2546 PERL_ARGS_ASSERT_MY_POPEN;
45bc9206 2547 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS		 2548 /* Call system's popen() to get a FILE *, then import it.
2549 used 0 for 2nd parameter to PerlIO_importFILE;
2550 apparently not used
2551 */
2552 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2553}
2b96b0a5
JH		 2554#else
2555#if defined(DJGPP)
2556FILE *djgpp_popen();
2557PerlIO *
cef6ea9d 2558Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2b96b0a5
JH		 2559{
2560 PERL_FLUSHALL_FOR_CHILD;
2561 /* Call system's popen() to get a FILE *, then import it.
2562 used 0 for 2nd parameter to PerlIO_importFILE;
2563 apparently not used
2564 */
2565 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2566}
9c12f1e5
RGS		 2567#else
2568#if defined(__LIBCATAMOUNT__)
2569PerlIO *
2570Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2571{
2572 return NULL;
2573}
2574#endif
2b96b0a5 2575#endif
7c0587c8
LW		 2576#endif
2577
2578#endif /* !DOSISH */
a687059c 2579
52e18b1f
GS		 2580/* this is called in parent before the fork() */
2581void
2582Perl_atfork_lock(void)
2583{
27da23d5 2584 dVAR;
3db8f154 2585#if defined(USE_ITHREADS)
52e18b1f
GS		 2586 /* locks must be held in locking order (if any) */
2587# ifdef MYMALLOC
2588 MUTEX_LOCK(&PL_malloc_mutex);
2589# endif
2590 OP_REFCNT_LOCK;
2591#endif
2592}
2593
2594/* this is called in both parent and child after the fork() */
2595void
2596Perl_atfork_unlock(void)
2597{
27da23d5 2598 dVAR;
3db8f154 2599#if defined(USE_ITHREADS)
52e18b1f
GS		 2600 /* locks must be released in same order as in atfork_lock() */
2601# ifdef MYMALLOC
2602 MUTEX_UNLOCK(&PL_malloc_mutex);
2603# endif
2604 OP_REFCNT_UNLOCK;
2605#endif
2606}
2607
2608Pid_t
2609Perl_my_fork(void)
2610{
2611#if defined(HAS_FORK)
2612 Pid_t pid;
3db8f154 2613#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS		 2614 atfork_lock();
2615 pid = fork();
2616 atfork_unlock();
2617#else
2618 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2619 * handlers elsewhere in the code */
2620 pid = fork();
2621#endif
2622 return pid;
2623#else
2624 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2625 Perl_croak_nocontext("fork() not available");
b961a566 2626 return 0;
52e18b1f
GS		 2627#endif /* HAS_FORK */
2628}
2629
748a9306 2630#ifdef DUMP_FDS
35ff7856 2631void
c9289b7b 2632Perl_dump_fds(pTHX_ const char *const s)
ae986130
LW		 2633{
2634 int fd;
c623ac67 2635 Stat_t tmpstatbuf;
ae986130 2636
7918f24d
NC		 2637 PERL_ARGS_ASSERT_DUMP_FDS;
2638
bf49b057 2639 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2640 for (fd = 0; fd < 32; fd++) {
6ad3d225 2641 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2642 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2643 }
bf49b057 2644 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2645 return;
ae986130 2646}
35ff7856 2647#endif /* DUMP_FDS */
ae986130 2648
fe14fcc3 2649#ifndef HAS_DUP2
fec02dd3 2650int
ba106d47 2651dup2(int oldfd, int newfd)
a687059c 2652{
a0d0e21e 2653#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2654 if (oldfd == newfd)
2655 return oldfd;
6ad3d225 2656 PerlLIO_close(newfd);
fec02dd3 2657 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2658#else
fc36a67e 2659#define DUP2_MAX_FDS 256
2660 int fdtmp[DUP2_MAX_FDS];
79072805 2661 I32 fdx = 0;
ae986130
LW		 2662 int fd;
2663
fe14fcc3 2664 if (oldfd == newfd)
fec02dd3 2665 return oldfd;
6ad3d225 2666 PerlLIO_close(newfd);
fc36a67e 2667 /* good enough for low fd's... */
6ad3d225 2668 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2669 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2670 PerlLIO_close(fd);
fc36a67e 2671 fd = -1;
2672 break;
2673 }
ae986130 2674 fdtmp[fdx++] = fd;
fc36a67e 2675 }
ae986130 2676 while (fdx > 0)
6ad3d225 2677 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2678 return fd;
62b28dd9 2679#endif
a687059c
LW		 2680}
2681#endif
2682
64ca3a65 2683#ifndef PERL_MICRO
ff68c719 2684#ifdef HAS_SIGACTION
2685
2686Sighandler_t
864dbfa3 2687Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2688{
27da23d5 2689 dVAR;
ff68c719 2690 struct sigaction act, oact;
2691
a10b1e10
JH		 2692#ifdef USE_ITHREADS
2693 /* only "parent" interpreter can diddle signals */
2694 if (PL_curinterp != aTHX)
8aad04aa 2695 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2696#endif
2697
8aad04aa 2698 act.sa_handler = (void(*)(int))handler;
ff68c719 2699 sigemptyset(&act.sa_mask);
2700 act.sa_flags = 0;
2701#ifdef SA_RESTART
4ffa73a3
JH		 2702 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2703 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2704#endif
358837b8 2705#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2706 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS		 2707 act.sa_flags |= SA_NOCLDWAIT;
2708#endif
ff68c719 2709 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2710 return (Sighandler_t) SIG_ERR;
ff68c719 2711 else
8aad04aa 2712 return (Sighandler_t) oact.sa_handler;
ff68c719 2713}
2714
2715Sighandler_t
864dbfa3 2716Perl_rsignal_state(pTHX_ int signo)
ff68c719 2717{
2718 struct sigaction oact;
96a5add6 2719 PERL_UNUSED_CONTEXT;
ff68c719 2720
2721 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2722 return (Sighandler_t) SIG_ERR;
ff68c719 2723 else
8aad04aa 2724 return (Sighandler_t) oact.sa_handler;
ff68c719 2725}
2726
2727int
864dbfa3 2728Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2729{
27da23d5 2730 dVAR;
ff68c719 2731 struct sigaction act;
2732
7918f24d
NC		 2733 PERL_ARGS_ASSERT_RSIGNAL_SAVE;
2734
a10b1e10
JH		 2735#ifdef USE_ITHREADS
2736 /* only "parent" interpreter can diddle signals */
2737 if (PL_curinterp != aTHX)
2738 return -1;
2739#endif
2740
8aad04aa 2741 act.sa_handler = (void(*)(int))handler;
ff68c719 2742 sigemptyset(&act.sa_mask);
2743 act.sa_flags = 0;
2744#ifdef SA_RESTART
4ffa73a3
JH		 2745 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2746 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2747#endif
36b5d377 2748#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2749 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS		 2750 act.sa_flags |= SA_NOCLDWAIT;
2751#endif
ff68c719 2752 return sigaction(signo, &act, save);
2753}
2754
2755int
864dbfa3 2756Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2757{
27da23d5 2758 dVAR;
a10b1e10
JH		 2759#ifdef USE_ITHREADS
2760 /* only "parent" interpreter can diddle signals */
2761 if (PL_curinterp != aTHX)
2762 return -1;
2763#endif
2764
ff68c719 2765 return sigaction(signo, save, (struct sigaction *)NULL);
2766}
2767
2768#else /* !HAS_SIGACTION */
2769
2770Sighandler_t
864dbfa3 2771Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2772{
39f1703b 2773#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2774 /* only "parent" interpreter can diddle signals */
2775 if (PL_curinterp != aTHX)
8aad04aa 2776 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2777#endif
2778
6ad3d225 2779 return PerlProc_signal(signo, handler);
ff68c719 2780}
2781
fabdb6c0 2782static Signal_t
4e35701f 2783sig_trap(int signo)
ff68c719 2784{
27da23d5
JH		 2785 dVAR;
2786 PL_sig_trapped++;
ff68c719 2787}
2788
2789Sighandler_t
864dbfa3 2790Perl_rsignal_state(pTHX_ int signo)
ff68c719 2791{
27da23d5 2792 dVAR;
ff68c719 2793 Sighandler_t oldsig;
2794
39f1703b 2795#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2796 /* only "parent" interpreter can diddle signals */
2797 if (PL_curinterp != aTHX)
8aad04aa 2798 return (Sighandler_t) SIG_ERR;
a10b1e10
JH		 2799#endif
2800
27da23d5 2801 PL_sig_trapped = 0;
6ad3d225
GS		 2802 oldsig = PerlProc_signal(signo, sig_trap);
2803 PerlProc_signal(signo, oldsig);
27da23d5 2804 if (PL_sig_trapped)
3aed30dc 2805 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719 2806 return oldsig;
2807}
2808
2809int
864dbfa3 2810Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2811{
39f1703b 2812#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2813 /* only "parent" interpreter can diddle signals */
2814 if (PL_curinterp != aTHX)
2815 return -1;
2816#endif
6ad3d225 2817 *save = PerlProc_signal(signo, handler);
8aad04aa 2818 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719 2819}
2820
2821int
864dbfa3 2822Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2823{
39f1703b 2824#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH		 2825 /* only "parent" interpreter can diddle signals */
2826 if (PL_curinterp != aTHX)
2827 return -1;
2828#endif
8aad04aa 2829 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719 2830}
2831
2832#endif /* !HAS_SIGACTION */
64ca3a65 2833#endif /* !PERL_MICRO */
ff68c719 2834
5f05dabc 2835 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
e37778c2 2836#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(__LIBCATAMOUNT__)
79072805 2837I32
864dbfa3 2838Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2839{
97aff369 2840 dVAR;
ff68c719 2841 Sigsave_t hstat, istat, qstat;
a687059c 2842 int status;
a0d0e21e 2843 SV **svp;
d8a83dd3
JH		 2844 Pid_t pid;
2845 Pid_t pid2;
03136e13 2846 bool close_failed;
4ee39169 2847 dSAVEDERRNO;
a687059c 2848
3280af22 2849 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
25d92023 2850 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2851 SvREFCNT_dec(*svp);
3280af22 2852 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2853#ifdef OS2
2854 if (pid == -1) { /* Opened by popen. */
2855 return my_syspclose(ptr);
2856 }
a1d180c4 2857#endif
f1618b10
CS		 2858 close_failed = (PerlIO_close(ptr) == EOF);
2859 SAVE_ERRNO;
7c0587c8 2860#ifdef UTS
6ad3d225 2861 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2862#endif
64ca3a65 2863#ifndef PERL_MICRO
8aad04aa
JH		 2864 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2865 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2866 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
64ca3a65 2867#endif
748a9306 2868 do {
1d3434b8
GS		 2869 pid2 = wait4pid(pid, &status, 0);
2870 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2871#ifndef PERL_MICRO
ff68c719 2872 rsignal_restore(SIGHUP, &hstat);
2873 rsignal_restore(SIGINT, &istat);
2874 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2875#endif
03136e13 2876 if (close_failed) {
4ee39169 2877 RESTORE_ERRNO;
03136e13
CS		 2878 return -1;
2879 }
1d3434b8 2880 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2881}
9c12f1e5
RGS		 2882#else
2883#if defined(__LIBCATAMOUNT__)
2884I32
2885Perl_my_pclose(pTHX_ PerlIO *ptr)
2886{
2887 return -1;
2888}
2889#endif
4633a7c4
LW		 2890#endif /* !DOSISH */
2891
e37778c2 2892#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(__LIBCATAMOUNT__)
79072805 2893I32
d8a83dd3 2894Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2895{
97aff369 2896 dVAR;
27da23d5 2897 I32 result = 0;
7918f24d 2898 PERL_ARGS_ASSERT_WAIT4PID;
b7953727
JH		 2899 if (!pid)
2900 return -1;
ca0c25f6 2901#ifdef PERL_USES_PL_PIDSTATUS
b7953727 2902 {
3aed30dc 2903 if (pid > 0) {
12072db5
NC		 2904 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2905 pid, rather than a string form. */
c4420975 2906 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
3aed30dc
HS		 2907 if (svp && *svp != &PL_sv_undef) {
2908 *statusp = SvIVX(*svp);
12072db5
NC		 2909 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2910 G_DISCARD);
3aed30dc
HS		 2911 return pid;
2912 }
2913 }
2914 else {
2915 HE *entry;
2916
2917 hv_iterinit(PL_pidstatus);
2918 if ((entry = hv_iternext(PL_pidstatus))) {
c4420975 2919 SV * const sv = hv_iterval(PL_pidstatus,entry);
7ea75b61 2920 I32 len;
0bcc34c2 2921 const char * const spid = hv_iterkey(entry,&len);
27da23d5 2922
12072db5
NC		 2923 assert (len == sizeof(Pid_t));
2924 memcpy((char *)&pid, spid, len);
3aed30dc 2925 *statusp = SvIVX(sv);
7b9a3241
NC		 2926 /* The hash iterator is currently on this entry, so simply
2927 calling hv_delete would trigger the lazy delete, which on
2928 aggregate does more work, beacuse next call to hv_iterinit()
2929 would spot the flag, and have to call the delete routine,
2930 while in the meantime any new entries can't re-use that
2931 memory. */
2932 hv_iterinit(PL_pidstatus);
7ea75b61 2933 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
3aed30dc
HS		 2934 return pid;
2935 }
20188a90
LW		 2936 }
2937 }
68a29c53 2938#endif
79072805 2939#ifdef HAS_WAITPID
367f3c24
IZ		 2940# ifdef HAS_WAITPID_RUNTIME
2941 if (!HAS_WAITPID_RUNTIME)
2942 goto hard_way;
2943# endif
cddd4526 2944 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2945 goto finish;
367f3c24
IZ		 2946#endif
2947#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
4608196e 2948 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
dfcfdb64 2949 goto finish;
367f3c24 2950#endif
ca0c25f6 2951#ifdef PERL_USES_PL_PIDSTATUS
27da23d5 2952#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2953 hard_way:
27da23d5 2954#endif
a0d0e21e 2955 {
a0d0e21e 2956 if (flags)
cea2e8a9 2957 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2958 else {
76e3520e 2959 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2960 pidgone(result,*statusp);
2961 if (result < 0)
2962 *statusp = -1;
2963 }
a687059c
LW		 2964 }
2965#endif
27da23d5 2966#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 2967 finish:
27da23d5 2968#endif
cddd4526
NIS		 2969 if (result < 0 && errno == EINTR) {
2970 PERL_ASYNC_CHECK();
48dbb59e 2971 errno = EINTR; /* reset in case a signal handler changed $! */
cddd4526
NIS		 2972 }
2973 return result;
a687059c 2974}
2986a63f 2975#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2976
ca0c25f6 2977#ifdef PERL_USES_PL_PIDSTATUS
7c0587c8 2978void
ed4173ef 2979S_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2980{
79072805 2981 register SV *sv;
a687059c 2982
12072db5 2983 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
862a34c6 2984 SvUPGRADE(sv,SVt_IV);
45977657 2985 SvIV_set(sv, status);
20188a90 2986 return;
a687059c 2987}
ca0c25f6 2988#endif
a687059c 2989
85ca448a 2990#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 2991int pclose();
ddcf38b7
IZ		 2992#ifdef HAS_FORK
2993int /* Cannot prototype with I32
2994 in os2ish.h. */
ba106d47 2995my_syspclose(PerlIO *ptr)
ddcf38b7 2996#else
79072805 2997I32
864dbfa3 2998Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2999#endif
a687059c 3000{
760ac839 3001 /* Needs work for PerlIO ! */
c4420975 3002 FILE * const f = PerlIO_findFILE(ptr);
7452cf6a 3003 const I32 result = pclose(f);
2b96b0a5
JH		 3004 PerlIO_releaseFILE(ptr,f);
3005 return result;
3006}
3007#endif
3008
933fea7f 3009#if defined(DJGPP)
2b96b0a5
JH		 3010int djgpp_pclose();
3011I32
3012Perl_my_pclose(pTHX_ PerlIO *ptr)
3013{
3014 /* Needs work for PerlIO ! */
c4420975 3015 FILE * const f = PerlIO_findFILE(ptr);
2b96b0a5 3016 I32 result = djgpp_pclose(f);
933fea7f 3017 result = (result << 8) & 0xff00;
760ac839
LW		 3018 PerlIO_releaseFILE(ptr,f);
3019 return result;
a687059c 3020}
7c0587c8 3021#endif
9f68db38 3022
16fa5c11 3023#define PERL_REPEATCPY_LINEAR 4
9f68db38 3024void
16fa5c11 3025Perl_repeatcpy(register char *to, register const char *from, I32 len, register I32 count)
9f68db38 3026{
7918f24d
NC		 3027 PERL_ARGS_ASSERT_REPEATCPY;
3028
16fa5c11
VP		 3029 if (len == 1)
3030 memset(to, *from, count);
3031 else if (count) {
3032 register char *p = to;
3033 I32 items, linear, half;
3034
3035 linear = count < PERL_REPEATCPY_LINEAR ? count : PERL_REPEATCPY_LINEAR;
3036 for (items = 0; items < linear; ++items) {
3037 register const char *q = from;
3038 I32 todo;
3039 for (todo = len; todo > 0; todo--)
3040 *p++ = *q++;
3041 }
3042
3043 half = count / 2;
3044 while (items <= half) {
3045 I32 size = items * len;
3046 memcpy(p, to, size);
3047 p += size;
3048 items *= 2;
9f68db38 3049 }
16fa5c11
VP		 3050
3051 if (count > items)
3052 memcpy(p, to, (count - items) * len);
9f68db38
LW		 3053 }
3054}
0f85fab0 3055
fe14fcc3 3056#ifndef HAS_RENAME
79072805 3057I32
4373e329 3058Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 3059{
93a17b20
LW		 3060 char *fa = strrchr(a,'/');
3061 char *fb = strrchr(b,'/');
c623ac67
GS		 3062 Stat_t tmpstatbuf1;
3063 Stat_t tmpstatbuf2;
c4420975 3064 SV * const tmpsv = sv_newmortal();
62b28dd9 3065
7918f24d
NC		 3066 PERL_ARGS_ASSERT_SAME_DIRENT;
3067
62b28dd9
LW		 3068 if (fa)
3069 fa++;
3070 else
3071 fa = a;
3072 if (fb)
3073 fb++;
3074 else
3075 fb = b;
3076 if (strNE(a,b))
3077 return FALSE;
3078 if (fa == a)
76f68e9b 3079 sv_setpvs(tmpsv, ".");
62b28dd9 3080 else
46fc3d4c 3081 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 3082 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 3083 return FALSE;
3084 if (fb == b)
76f68e9b 3085 sv_setpvs(tmpsv, ".");
62b28dd9 3086 else
46fc3d4c 3087 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 3088 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 3089 return FALSE;
3090 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3091 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3092}
fe14fcc3
LW		 3093#endif /* !HAS_RENAME */
3094
491527d0 3095char*
7f315aed
NC		 3096Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3097 const char *const *const search_ext, I32 flags)
491527d0 3098{
97aff369 3099 dVAR;
bd61b366
SS		 3100 const char *xfound = NULL;
3101 char *xfailed = NULL;
0f31cffe 3102 char tmpbuf[MAXPATHLEN];
491527d0 3103 register char *s;
5f74f29c 3104 I32 len = 0;
491527d0 3105 int retval;
39a02377 3106 char *bufend;
491527d0
GS		 3107#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
3108# define SEARCH_EXTS ".bat", ".cmd", NULL
3109# define MAX_EXT_LEN 4
3110#endif
3111#ifdef OS2
3112# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3113# define MAX_EXT_LEN 4
3114#endif
3115#ifdef VMS
3116# define SEARCH_EXTS ".pl", ".com", NULL
3117# define MAX_EXT_LEN 4
3118#endif
3119 /* additional extensions to try in each dir if scriptname not found */
3120#ifdef SEARCH_EXTS
0bcc34c2 3121 static const char *const exts[] = { SEARCH_EXTS };
7f315aed 3122 const char *const *const ext = search_ext ? search_ext : exts;
491527d0 3123 int extidx = 0, i = 0;
bd61b366 3124 const char *curext = NULL;
491527d0 3125#else
53c1dcc0 3126 PERL_UNUSED_ARG(search_ext);
491527d0
GS		 3127# define MAX_EXT_LEN 0
3128#endif
3129
7918f24d
NC		 3130 PERL_ARGS_ASSERT_FIND_SCRIPT;
3131
491527d0
GS		 3132 /*
3133 * If dosearch is true and if scriptname does not contain path
3134 * delimiters, search the PATH for scriptname.
3135 *
3136 * If SEARCH_EXTS is also defined, will look for each
3137 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3138 * while searching the PATH.
3139 *
3140 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3141 * proceeds as follows:
3142 * If DOSISH or VMSISH:
3143 * + look for ./scriptname{,.foo,.bar}
3144 * + search the PATH for scriptname{,.foo,.bar}
3145 *
3146 * If !DOSISH:
3147 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3148 * this will not look in '.' if it's not in the PATH)
3149 */
84486fc6 3150 tmpbuf[0] = '\0';
491527d0
GS		 3151
3152#ifdef VMS
3153# ifdef ALWAYS_DEFTYPES
3154 len = strlen(scriptname);
3155 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
c4420975 3156 int idx = 0, deftypes = 1;
491527d0
GS		 3157 bool seen_dot = 1;
3158
bd61b366 3159 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
491527d0
GS		 3160# else
3161 if (dosearch) {
c4420975 3162 int idx = 0, deftypes = 1;
491527d0
GS		 3163 bool seen_dot = 1;
3164
bd61b366 3165 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
491527d0
GS		 3166# endif
3167 /* The first time through, just add SEARCH_EXTS to whatever we
3168 * already have, so we can check for default file types. */
3169 while (deftypes ||
84486fc6 3170 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 3171 {
3172 if (deftypes) {
3173 deftypes = 0;
84486fc6 3174 *tmpbuf = '\0';
491527d0 3175 }
84486fc6
GS		 3176 if ((strlen(tmpbuf) + strlen(scriptname)
3177 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 3178 continue; /* don't search dir with too-long name */
6fca0082 3179 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
491527d0
GS		 3180#else /* !VMS */
3181
3182#ifdef DOSISH
3183 if (strEQ(scriptname, "-"))
3184 dosearch = 0;
3185 if (dosearch) { /* Look in '.' first. */
fe2774ed 3186 const char *cur = scriptname;
491527d0
GS		 3187#ifdef SEARCH_EXTS
3188 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3189 while (ext[i])
3190 if (strEQ(ext[i++],curext)) {
3191 extidx = -1; /* already has an ext */
3192 break;
3193 }
3194 do {
3195#endif
3196 DEBUG_p(PerlIO_printf(Perl_debug_log,
3197 "Looking for %s\n",cur));
017f25f1
IZ		 3198 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3199 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 3200 dosearch = 0;
3201 scriptname = cur;
3202#ifdef SEARCH_EXTS
3203 break;
3204#endif
3205 }
3206#ifdef SEARCH_EXTS
3207 if (cur == scriptname) {
3208 len = strlen(scriptname);
84486fc6 3209 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 3210 break;
9e4425f7
SH		 3211 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3212 cur = tmpbuf;
491527d0
GS		 3213 }
3214 } while (extidx >= 0 && ext[extidx] /* try an extension? */
6fca0082 3215 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
491527d0
GS		 3216#endif
3217 }
3218#endif
3219
3220 if (dosearch && !strchr(scriptname, '/')
3221#ifdef DOSISH
3222 && !strchr(scriptname, '\\')
3223#endif
cd39f2b6 3224 && (s = PerlEnv_getenv("PATH")))
cd39f2b6 3225 {
491527d0 3226 bool seen_dot = 0;
92f0c265 3227
39a02377
DM		 3228 bufend = s + strlen(s);
3229 while (s < bufend) {
491527d0
GS		 3230#if defined(atarist) || defined(DOSISH)
3231 for (len = 0; *s
3232# ifdef atarist
3233 && *s != ','
3234# endif
3235 && *s != ';'; len++, s++) {
84486fc6
GS		 3236 if (len < sizeof tmpbuf)
3237 tmpbuf[len] = *s;
491527d0 3238 }
84486fc6
GS		 3239 if (len < sizeof tmpbuf)
3240 tmpbuf[len] = '\0';
491527d0 3241#else /* ! (atarist || DOSISH) */
39a02377 3242 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
491527d0
GS		 3243 ':',
3244 &len);
3245#endif /* ! (atarist || DOSISH) */
39a02377 3246 if (s < bufend)
491527d0 3247 s++;
84486fc6 3248 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0
GS		 3249 continue; /* don't search dir with too-long name */
3250 if (len
cd86ed9d 3251# if defined(atarist) || defined(DOSISH)
84486fc6
GS		 3252 && tmpbuf[len - 1] != '/'
3253 && tmpbuf[len - 1] != '\\'
490a0e98 3254# endif
491527d0 3255 )
84486fc6
GS		 3256 tmpbuf[len++] = '/';
3257 if (len == 2 && tmpbuf[0] == '.')
491527d0 3258 seen_dot = 1;
28f0d0ec 3259 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
491527d0
GS		 3260#endif /* !VMS */
3261
3262#ifdef SEARCH_EXTS
84486fc6 3263 len = strlen(tmpbuf);
491527d0
GS		 3264 if (extidx > 0) /* reset after previous loop */
3265 extidx = 0;
3266 do {
3267#endif
84486fc6 3268 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 3269 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 3270 if (S_ISDIR(PL_statbuf.st_mode)) {
3271 retval = -1;
3272 }
491527d0
GS		 3273#ifdef SEARCH_EXTS
3274 } while ( retval < 0 /* not there */
3275 && extidx>=0 && ext[extidx] /* try an extension? */
6fca0082 3276 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
491527d0
GS		 3277 );
3278#endif
3279 if (retval < 0)
3280 continue;
3280af22
NIS		 3281 if (S_ISREG(PL_statbuf.st_mode)
3282 && cando(S_IRUSR,TRUE,&PL_statbuf)
e37778c2 3283#if !defined(DOSISH)
3280af22 3284 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 3285#endif
3286 )
3287 {
3aed30dc 3288 xfound = tmpbuf; /* bingo! */
491527d0
GS		 3289 break;
3290 }
3291 if (!xfailed)
84486fc6 3292 xfailed = savepv(tmpbuf);
491527d0
GS		 3293 }
3294#ifndef DOSISH
017f25f1 3295 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3296 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3297 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 3298#endif
3299 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 3300 if (!xfound) {
3301 if (flags & 1) { /* do or die? */
3aed30dc 3302 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 3303 (xfailed ? "execute" : "find"),
3304 (xfailed ? xfailed : scriptname),
3305 (xfailed ? "" : " on PATH"),
3306 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3307 }
bd61b366 3308 scriptname = NULL;
9ccb31f9 3309 }
43c5f42d 3310 Safefree(xfailed);
491527d0
GS		 3311 scriptname = xfound;
3312 }
bd61b366 3313 return (scriptname ? savepv(scriptname) : NULL);
491527d0
GS		 3314}
3315
ba869deb
GS		 3316#ifndef PERL_GET_CONTEXT_DEFINED
3317
3318void *
3319Perl_get_context(void)
3320{
27da23d5 3321 dVAR;
3db8f154 3322#if defined(USE_ITHREADS)
ba869deb
GS		 3323# ifdef OLD_PTHREADS_API
3324 pthread_addr_t t;
3325 if (pthread_getspecific(PL_thr_key, &t))
3326 Perl_croak_nocontext("panic: pthread_getspecific");
3327 return (void*)t;
3328# else
bce813aa 3329# ifdef I_MACH_CTHREADS
8b8b35ab 3330 return (void*)cthread_data(cthread_self());
bce813aa 3331# else
8b8b35ab
JH		 3332 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3333# endif
c44d3fdb 3334# endif
ba869deb
GS		 3335#else
3336 return (void*)NULL;
3337#endif
3338}
3339
3340void
3341Perl_set_context(void *t)
3342{
8772537c 3343 dVAR;
7918f24d 3344 PERL_ARGS_ASSERT_SET_CONTEXT;
3db8f154 3345#if defined(USE_ITHREADS)
c44d3fdb
GS		 3346# ifdef I_MACH_CTHREADS
3347 cthread_set_data(cthread_self(), t);
3348# else
ba869deb
GS		 3349 if (pthread_setspecific(PL_thr_key, t))
3350 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3351# endif
b464bac0 3352#else
8772537c 3353 PERL_UNUSED_ARG(t);
ba869deb
GS		 3354#endif
3355}
3356
3357#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3358
27da23d5 3359#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3360struct perl_vars *
864dbfa3 3361Perl_GetVars(pTHX)
22239a37 3362{
533c011a 3363 return &PL_Vars;
22239a37 3364}
31fb1209
NIS		 3365#endif
3366
1cb0ed9b 3367char **
864dbfa3 3368Perl_get_op_names(pTHX)
31fb1209 3369{
96a5add6
AL		 3370 PERL_UNUSED_CONTEXT;
3371 return (char **)PL_op_name;
31fb1209
NIS		 3372}
3373
1cb0ed9b 3374char **
864dbfa3 3375Perl_get_op_descs(pTHX)
31fb1209 3376{
96a5add6
AL		 3377 PERL_UNUSED_CONTEXT;
3378 return (char **)PL_op_desc;
31fb1209 3379}
9e6b2b00 3380
e1ec3a88 3381const char *
864dbfa3 3382Perl_get_no_modify(pTHX)
9e6b2b00 3383{
96a5add6
AL		 3384 PERL_UNUSED_CONTEXT;
3385 return PL_no_modify;
9e6b2b00
GS		 3386}
3387
3388U32 *
864dbfa3 3389Perl_get_opargs(pTHX)
9e6b2b00 3390{
96a5add6
AL		 3391 PERL_UNUSED_CONTEXT;
3392 return (U32 *)PL_opargs;
9e6b2b00 3393}
51aa15f3 3394
0cb96387
GS		 3395PPADDR_t*
3396Perl_get_ppaddr(pTHX)
3397{
96a5add6
AL		 3398 dVAR;
3399 PERL_UNUSED_CONTEXT;
3400 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS		 3401}
3402
a6c40364
GS		 3403#ifndef HAS_GETENV_LEN
3404char *
bf4acbe4 3405Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3406{
8772537c 3407 char * const env_trans = PerlEnv_getenv(env_elem);
96a5add6 3408 PERL_UNUSED_CONTEXT;
7918f24d 3409 PERL_ARGS_ASSERT_GETENV_LEN;
a6c40364
GS		 3410 if (env_trans)
3411 *len = strlen(env_trans);
3412 return env_trans;
f675dbe5
CB		 3413}
3414#endif
3415
dc9e4912
GS		 3416
3417MGVTBL*
864dbfa3 3418Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3419{
7452cf6a 3420 const MGVTBL* result;
96a5add6 3421 PERL_UNUSED_CONTEXT;
dc9e4912
GS		 3422
3423 switch(vtbl_id) {
3424 case want_vtbl_sv:
3425 result = &PL_vtbl_sv;
3426 break;
3427 case want_vtbl_env:
3428 result = &PL_vtbl_env;
3429 break;
3430 case want_vtbl_envelem:
3431 result = &PL_vtbl_envelem;
3432 break;
3433 case want_vtbl_sig:
3434 result = &PL_vtbl_sig;
3435 break;
3436 case want_vtbl_sigelem:
3437 result = &PL_vtbl_sigelem;
3438 break;
3439 case want_vtbl_pack:
3440 result = &PL_vtbl_pack;
3441 break;
3442 case want_vtbl_packelem:
3443 result = &PL_vtbl_packelem;
3444 break;
3445 case want_vtbl_dbline:
3446 result = &PL_vtbl_dbline;
3447 break;
3448 case want_vtbl_isa:
3449 result = &PL_vtbl_isa;
3450 break;
3451 case want_vtbl_isaelem:
3452 result = &PL_vtbl_isaelem;
3453 break;
3454 case want_vtbl_arylen:
3455 result = &PL_vtbl_arylen;
3456 break;
dc9e4912
GS		 3457 case want_vtbl_mglob:
3458 result = &PL_vtbl_mglob;
3459 break;
3460 case want_vtbl_nkeys:
3461 result = &PL_vtbl_nkeys;
3462 break;
3463 case want_vtbl_taint:
3464 result = &PL_vtbl_taint;
3465 break;
3466 case want_vtbl_substr:
3467 result = &PL_vtbl_substr;
3468 break;
3469 case want_vtbl_vec:
3470 result = &PL_vtbl_vec;
3471 break;
3472 case want_vtbl_pos:
3473 result = &PL_vtbl_pos;
3474 break;
3475 case want_vtbl_bm:
3476 result = &PL_vtbl_bm;
3477 break;
3478 case want_vtbl_fm:
3479 result = &PL_vtbl_fm;
3480 break;
3481 case want_vtbl_uvar:
3482 result = &PL_vtbl_uvar;
3483 break;
dc9e4912
GS		 3484 case want_vtbl_defelem:
3485 result = &PL_vtbl_defelem;
3486 break;
3487 case want_vtbl_regexp:
3488 result = &PL_vtbl_regexp;
3489 break;
3490 case want_vtbl_regdata:
3491 result = &PL_vtbl_regdata;
3492 break;
3493 case want_vtbl_regdatum:
3494 result = &PL_vtbl_regdatum;
3495 break;
3c90161d 3496#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3497 case want_vtbl_collxfrm:
3498 result = &PL_vtbl_collxfrm;
3499 break;
3c90161d 3500#endif
dc9e4912
GS		 3501 case want_vtbl_amagic:
3502 result = &PL_vtbl_amagic;
3503 break;
3504 case want_vtbl_amagicelem:
3505 result = &PL_vtbl_amagicelem;
3506 break;
810b8aa5
GS		 3507 case want_vtbl_backref:
3508 result = &PL_vtbl_backref;
3509 break;
7e8c5dac
HS		 3510 case want_vtbl_utf8:
3511 result = &PL_vtbl_utf8;
3512 break;
7452cf6a 3513 default:
4608196e 3514 result = NULL;
7452cf6a 3515 break;
dc9e4912 3516 }
27da23d5 3517 return (MGVTBL*)result;
dc9e4912
GS		 3518}
3519
767df6a1 3520I32
864dbfa3 3521Perl_my_fflush_all(pTHX)
767df6a1 3522{
f800e14d 3523#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3524 return PerlIO_flush(NULL);
767df6a1 3525#else
8fbdfb7c 3526# if defined(HAS__FWALK)
f13a2bc0 3527 extern int fflush(FILE *);
74cac757
JH		 3528 /* undocumented, unprototyped, but very useful BSDism */
3529 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3530 _fwalk(&fflush);
74cac757 3531 return 0;
8fa7f367 3532# else
8fbdfb7c 3533# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3534 long open_max = -1;
8fbdfb7c 3535# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3536 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3537# else
8fa7f367 3538# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3539 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH		 3540# else
3541# ifdef FOPEN_MAX
74cac757 3542 open_max = FOPEN_MAX;
8fa7f367
JH		 3543# else
3544# ifdef OPEN_MAX
74cac757 3545 open_max = OPEN_MAX;
8fa7f367
JH		 3546# else
3547# ifdef _NFILE
d2201af2 3548 open_max = _NFILE;
8fa7f367
JH		 3549# endif
3550# endif
74cac757 3551# endif
767df6a1
JH		 3552# endif
3553# endif
767df6a1
JH		 3554 if (open_max > 0) {
3555 long i;
3556 for (i = 0; i < open_max; i++)
d2201af2
AD		 3557 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3558 STDIO_STREAM_ARRAY[i]._file < open_max &&
3559 STDIO_STREAM_ARRAY[i]._flag)
3560 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3561 return 0;
3562 }
8fbdfb7c 3563# endif
93189314 3564 SETERRNO(EBADF,RMS_IFI);
767df6a1 3565 return EOF;
74cac757 3566# endif
767df6a1
JH		 3567#endif
3568}
097ee67d 3569
69282e91 3570void
e1ec3a88