This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
declare perl core's sig handler as 1-arg
[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 *
cdad3b53 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"
7dc86639 27#include "reentr.h"
62b28dd9 28
97cb92d6 29#if defined(USE_PERLIO)
2e0cfa16 30#include "perliol.h" /* For PerlIOUnix_refcnt */
6f408c34 31#endif
2e0cfa16 32
64ca3a65 33#ifndef PERL_MICRO
a687059c 34#include <signal.h>
36477c24
PP
35#ifndef SIG_ERR
36# define SIG_ERR ((Sighandler_t) -1)
37#endif
64ca3a65 38#endif
36477c24 39
3be8f094
TC
40#include <math.h>
41#include <stdlib.h>
42
172d2248
OS
43#ifdef __Lynx__
44/* Missing protos on LynxOS */
45int putenv(char *);
46#endif
47
40262ff4
AB
48#ifdef __amigaos__
49# include "amigaos4/amigaio.h"
50#endif
51
868439a2
JH
52#ifdef HAS_SELECT
53# ifdef I_SYS_SELECT
54# include <sys/select.h>
55# endif
56#endif
57
470dd224 58#ifdef USE_C_BACKTRACE
0762e42f
JH
59# ifdef I_BFD
60# define USE_BFD
61# ifdef PERL_DARWIN
62# undef USE_BFD /* BFD is useless in OS X. */
63# endif
64# ifdef USE_BFD
65# include <bfd.h>
66# endif
67# endif
470dd224
JH
68# ifdef I_DLFCN
69# include <dlfcn.h>
70# endif
71# ifdef I_EXECINFO
72# include <execinfo.h>
73# endif
74#endif
75
b001a0d1
FC
76#ifdef PERL_DEBUG_READONLY_COW
77# include <sys/mman.h>
78#endif
79
8d063cd8 80#define FLUSH
8d063cd8 81
a687059c
LW
82/* NOTE: Do not call the next three routines directly. Use the macros
83 * in handy.h, so that we can easily redefine everything to do tracking of
84 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 85 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW
86 */
87
79a92154 88#if defined (DEBUGGING) || defined(PERL_IMPLICIT_SYS) || defined (PERL_TRACK_MEMPOOL)
1f4d2d4e
NC
89# define ALWAYS_NEED_THX
90#endif
91
b001a0d1
FC
92#if defined(PERL_TRACK_MEMPOOL) && defined(PERL_DEBUG_READONLY_COW)
93static void
94S_maybe_protect_rw(pTHX_ struct perl_memory_debug_header *header)
95{
96 if (header->readonly
97 && mprotect(header, header->size, PROT_READ|PROT_WRITE))
98 Perl_warn(aTHX_ "mprotect for COW string %p %lu failed with %d",
99 header, header->size, errno);
100}
101
102static void
103S_maybe_protect_ro(pTHX_ struct perl_memory_debug_header *header)
104{
105 if (header->readonly
106 && mprotect(header, header->size, PROT_READ))
107 Perl_warn(aTHX_ "mprotect RW for COW string %p %lu failed with %d",
108 header, header->size, errno);
109}
110# define maybe_protect_rw(foo) S_maybe_protect_rw(aTHX_ foo)
111# define maybe_protect_ro(foo) S_maybe_protect_ro(aTHX_ foo)
112#else
113# define maybe_protect_rw(foo) NOOP
114# define maybe_protect_ro(foo) NOOP
115#endif
116
3f07c2bc
FC
117#if defined(PERL_TRACK_MEMPOOL) || defined(PERL_DEBUG_READONLY_COW)
118 /* Use memory_debug_header */
119# define USE_MDH
120# if (defined(PERL_POISON) && defined(PERL_TRACK_MEMPOOL)) \
121 || defined(PERL_DEBUG_READONLY_COW)
122# define MDH_HAS_SIZE
123# endif
124#endif
125
26fa51c3
AMS
126/* paranoid version of system's malloc() */
127
bd4080b3 128Malloc_t
4f63d024 129Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 130{
1f4d2d4e 131#ifdef ALWAYS_NEED_THX
54aff467 132 dTHX;
0cb20dae 133#endif
bd4080b3 134 Malloc_t ptr;
9f300641 135 dSAVEDERRNO;
9efda33a
TC
136
137#ifdef USE_MDH
138 if (size + PERL_MEMORY_DEBUG_HEADER_SIZE < size)
139 goto out_of_memory;
a78adc84 140 size += PERL_MEMORY_DEBUG_HEADER_SIZE;
9efda33a 141#endif
34de22dd 142#ifdef DEBUGGING
03c5309f 143 if ((SSize_t)size < 0)
147e3846 144 Perl_croak_nocontext("panic: malloc, size=%" UVuf, (UV) size);
34de22dd 145#endif
b001a0d1 146 if (!size) size = 1; /* malloc(0) is NASTY on our system */
9f300641 147 SAVE_ERRNO;
b001a0d1
FC
148#ifdef PERL_DEBUG_READONLY_COW
149 if ((ptr = mmap(0, size, PROT_READ|PROT_WRITE,
150 MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
151 perror("mmap failed");
152 abort();
153 }
154#else
155 ptr = (Malloc_t)PerlMem_malloc(size?size:1);
156#endif
da927450 157 PERL_ALLOC_CHECK(ptr);
bd61b366 158 if (ptr != NULL) {
3f07c2bc 159#ifdef USE_MDH
7cb608b5
NC
160 struct perl_memory_debug_header *const header
161 = (struct perl_memory_debug_header *)ptr;
9a083ecf
NC
162#endif
163
164#ifdef PERL_POISON
7e337ee0 165 PoisonNew(((char *)ptr), size, char);
9a083ecf 166#endif
7cb608b5 167
9a083ecf 168#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
169 header->interpreter = aTHX;
170 /* Link us into the list. */
171 header->prev = &PL_memory_debug_header;
172 header->next = PL_memory_debug_header.next;
173 PL_memory_debug_header.next = header;
b001a0d1 174 maybe_protect_rw(header->next);
7cb608b5 175 header->next->prev = header;
b001a0d1
FC
176 maybe_protect_ro(header->next);
177# ifdef PERL_DEBUG_READONLY_COW
178 header->readonly = 0;
cd1541b2 179# endif
e8dda941 180#endif
3f07c2bc 181#ifdef MDH_HAS_SIZE
b001a0d1
FC
182 header->size = size;
183#endif
b033d668 184 ptr = (Malloc_t)((char*)ptr+PERL_MEMORY_DEBUG_HEADER_SIZE);
147e3846 185 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%" UVxf ": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
b033d668 186
9f300641
TC
187 /* malloc() can modify errno() even on success, but since someone
188 writing perl code doesn't have any control over when perl calls
189 malloc() we need to hide that.
190 */
191 RESTORE_ERRNO;
b033d668 192 }
8d063cd8 193 else {
296f0d56 194#ifdef USE_MDH
9efda33a 195 out_of_memory:
296f0d56
TC
196#endif
197 {
198#ifndef ALWAYS_NEED_THX
199 dTHX;
200#endif
201 if (PL_nomemok)
202 ptr = NULL;
203 else
204 croak_no_mem();
205 }
8d063cd8 206 }
b033d668 207 return ptr;
8d063cd8
LW
208}
209
f2517201 210/* paranoid version of system's realloc() */
8d063cd8 211
bd4080b3 212Malloc_t
4f63d024 213Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 214{
1f4d2d4e 215#ifdef ALWAYS_NEED_THX
54aff467 216 dTHX;
0cb20dae 217#endif
bd4080b3 218 Malloc_t ptr;
b001a0d1
FC
219#ifdef PERL_DEBUG_READONLY_COW
220 const MEM_SIZE oldsize = where
a78adc84 221 ? ((struct perl_memory_debug_header *)((char *)where - PERL_MEMORY_DEBUG_HEADER_SIZE))->size
b001a0d1
FC
222 : 0;
223#endif
8d063cd8 224
7614df0c 225 if (!size) {
f2517201 226 safesysfree(where);
b033d668 227 ptr = NULL;
7614df0c 228 }
b033d668
DD
229 else if (!where) {
230 ptr = safesysmalloc(size);
231 }
232 else {
9f300641 233 dSAVE_ERRNO;
3f07c2bc 234#ifdef USE_MDH
b033d668 235 where = (Malloc_t)((char*)where-PERL_MEMORY_DEBUG_HEADER_SIZE);
9efda33a
TC
236 if (size + PERL_MEMORY_DEBUG_HEADER_SIZE < size)
237 goto out_of_memory;
b033d668
DD
238 size += PERL_MEMORY_DEBUG_HEADER_SIZE;
239 {
240 struct perl_memory_debug_header *const header
241 = (struct perl_memory_debug_header *)where;
7cb608b5 242
b001a0d1 243# ifdef PERL_TRACK_MEMPOOL
b033d668
DD
244 if (header->interpreter != aTHX) {
245 Perl_croak_nocontext("panic: realloc from wrong pool, %p!=%p",
246 header->interpreter, aTHX);
247 }
248 assert(header->next->prev == header);
249 assert(header->prev->next == header);
cd1541b2 250# ifdef PERL_POISON
b033d668
DD
251 if (header->size > size) {
252 const MEM_SIZE freed_up = header->size - size;
253 char *start_of_freed = ((char *)where) + size;
254 PoisonFree(start_of_freed, freed_up, char);
255 }
cd1541b2 256# endif
b001a0d1 257# endif
3f07c2bc 258# ifdef MDH_HAS_SIZE
b033d668 259 header->size = size;
b001a0d1 260# endif
b033d668 261 }
e8dda941 262#endif
34de22dd 263#ifdef DEBUGGING
b033d668 264 if ((SSize_t)size < 0)
147e3846 265 Perl_croak_nocontext("panic: realloc, size=%" UVuf, (UV)size);
34de22dd 266#endif
b001a0d1 267#ifdef PERL_DEBUG_READONLY_COW
b033d668
DD
268 if ((ptr = mmap(0, size, PROT_READ|PROT_WRITE,
269 MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
270 perror("mmap failed");
271 abort();
272 }
273 Copy(where,ptr,oldsize < size ? oldsize : size,char);
274 if (munmap(where, oldsize)) {
275 perror("munmap failed");
276 abort();
277 }
b001a0d1 278#else
b033d668 279 ptr = (Malloc_t)PerlMem_realloc(where,size);
b001a0d1 280#endif
b033d668 281 PERL_ALLOC_CHECK(ptr);
a1d180c4 282
4fd0a9b8
NC
283 /* MUST do this fixup first, before doing ANYTHING else, as anything else
284 might allocate memory/free/move memory, and until we do the fixup, it
285 may well be chasing (and writing to) free memory. */
b033d668 286 if (ptr != NULL) {
b001a0d1 287#ifdef PERL_TRACK_MEMPOOL
b033d668
DD
288 struct perl_memory_debug_header *const header
289 = (struct perl_memory_debug_header *)ptr;
7cb608b5 290
9a083ecf 291# ifdef PERL_POISON
b033d668
DD
292 if (header->size < size) {
293 const MEM_SIZE fresh = size - header->size;
294 char *start_of_fresh = ((char *)ptr) + size;
295 PoisonNew(start_of_fresh, fresh, char);
296 }
9a083ecf
NC
297# endif
298
b033d668
DD
299 maybe_protect_rw(header->next);
300 header->next->prev = header;
301 maybe_protect_ro(header->next);
302 maybe_protect_rw(header->prev);
303 header->prev->next = header;
304 maybe_protect_ro(header->prev);
b001a0d1 305#endif
b033d668 306 ptr = (Malloc_t)((char*)ptr+PERL_MEMORY_DEBUG_HEADER_SIZE);
9f300641
TC
307
308 /* realloc() can modify errno() even on success, but since someone
309 writing perl code doesn't have any control over when perl calls
310 realloc() we need to hide that.
311 */
312 RESTORE_ERRNO;
b033d668 313 }
4fd0a9b8
NC
314
315 /* In particular, must do that fixup above before logging anything via
316 *printf(), as it can reallocate memory, which can cause SEGVs. */
317
147e3846
KW
318 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%" UVxf ": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
319 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%" UVxf ": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
4fd0a9b8 320
b033d668 321 if (ptr == NULL) {
296f0d56 322#ifdef USE_MDH
9efda33a 323 out_of_memory:
296f0d56
TC
324#endif
325 {
326#ifndef ALWAYS_NEED_THX
327 dTHX;
328#endif
329 if (PL_nomemok)
330 ptr = NULL;
331 else
332 croak_no_mem();
333 }
0cb20dae 334 }
8d063cd8 335 }
b033d668 336 return ptr;
8d063cd8
LW
337}
338
f2517201 339/* safe version of system's free() */
8d063cd8 340
54310121 341Free_t
4f63d024 342Perl_safesysfree(Malloc_t where)
8d063cd8 343{
79a92154 344#ifdef ALWAYS_NEED_THX
54aff467 345 dTHX;
155aba94 346#endif
147e3846 347 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%" UVxf ": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 348 if (where) {
3f07c2bc 349#ifdef USE_MDH
6edcbed6 350 Malloc_t where_intrn = (Malloc_t)((char*)where-PERL_MEMORY_DEBUG_HEADER_SIZE);
cd1541b2 351 {
7cb608b5 352 struct perl_memory_debug_header *const header
6edcbed6 353 = (struct perl_memory_debug_header *)where_intrn;
7cb608b5 354
3f07c2bc 355# ifdef MDH_HAS_SIZE
b001a0d1
FC
356 const MEM_SIZE size = header->size;
357# endif
358# ifdef PERL_TRACK_MEMPOOL
7cb608b5 359 if (header->interpreter != aTHX) {
5637ef5b
NC
360 Perl_croak_nocontext("panic: free from wrong pool, %p!=%p",
361 header->interpreter, aTHX);
7cb608b5
NC
362 }
363 if (!header->prev) {
cd1541b2
NC
364 Perl_croak_nocontext("panic: duplicate free");
365 }
5637ef5b
NC
366 if (!(header->next))
367 Perl_croak_nocontext("panic: bad free, header->next==NULL");
368 if (header->next->prev != header || header->prev->next != header) {
369 Perl_croak_nocontext("panic: bad free, ->next->prev=%p, "
370 "header=%p, ->prev->next=%p",
371 header->next->prev, header,
372 header->prev->next);
cd1541b2 373 }
7cb608b5 374 /* Unlink us from the chain. */
b001a0d1 375 maybe_protect_rw(header->next);
7cb608b5 376 header->next->prev = header->prev;
b001a0d1
FC
377 maybe_protect_ro(header->next);
378 maybe_protect_rw(header->prev);
7cb608b5 379 header->prev->next = header->next;
b001a0d1
FC
380 maybe_protect_ro(header->prev);
381 maybe_protect_rw(header);
7cb608b5 382# ifdef PERL_POISON
6edcbed6 383 PoisonNew(where_intrn, size, char);
cd1541b2 384# endif
7cb608b5
NC
385 /* Trigger the duplicate free warning. */
386 header->next = NULL;
b001a0d1
FC
387# endif
388# ifdef PERL_DEBUG_READONLY_COW
6edcbed6 389 if (munmap(where_intrn, size)) {
b001a0d1
FC
390 perror("munmap failed");
391 abort();
392 }
393# endif
7cb608b5 394 }
6edcbed6
DD
395#else
396 Malloc_t where_intrn = where;
397#endif /* USE_MDH */
b001a0d1 398#ifndef PERL_DEBUG_READONLY_COW
6edcbed6 399 PerlMem_free(where_intrn);
b001a0d1 400#endif
378cc40b 401 }
8d063cd8
LW
402}
403
f2517201 404/* safe version of system's calloc() */
1050c9ca 405
bd4080b3 406Malloc_t
4f63d024 407Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 408{
1f4d2d4e 409#ifdef ALWAYS_NEED_THX
54aff467 410 dTHX;
0cb20dae 411#endif
bd4080b3 412 Malloc_t ptr;
3f07c2bc 413#if defined(USE_MDH) || defined(DEBUGGING)
ad7244db 414 MEM_SIZE total_size = 0;
4b1123b9 415#endif
1050c9ca 416
ad7244db 417 /* Even though calloc() for zero bytes is strange, be robust. */
4b1123b9 418 if (size && (count <= MEM_SIZE_MAX / size)) {
3f07c2bc 419#if defined(USE_MDH) || defined(DEBUGGING)
ad7244db 420 total_size = size * count;
4b1123b9
NC
421#endif
422 }
ad7244db 423 else
d1decf2b 424 croak_memory_wrap();
3f07c2bc 425#ifdef USE_MDH
a78adc84
DM
426 if (PERL_MEMORY_DEBUG_HEADER_SIZE <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
427 total_size += PERL_MEMORY_DEBUG_HEADER_SIZE;
ad7244db 428 else
d1decf2b 429 croak_memory_wrap();
ad7244db 430#endif
1050c9ca 431#ifdef DEBUGGING
03c5309f 432 if ((SSize_t)size < 0 || (SSize_t)count < 0)
147e3846 433 Perl_croak_nocontext("panic: calloc, size=%" UVuf ", count=%" UVuf,
5637ef5b 434 (UV)size, (UV)count);
1050c9ca 435#endif
b001a0d1
FC
436#ifdef PERL_DEBUG_READONLY_COW
437 if ((ptr = mmap(0, total_size ? total_size : 1, PROT_READ|PROT_WRITE,
438 MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
439 perror("mmap failed");
440 abort();
441 }
442#elif defined(PERL_TRACK_MEMPOOL)
e1a95402
NC
443 /* Have to use malloc() because we've added some space for our tracking
444 header. */
ad7244db
JH
445 /* malloc(0) is non-portable. */
446 ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1);
e1a95402
NC
447#else
448 /* Use calloc() because it might save a memset() if the memory is fresh
449 and clean from the OS. */
ad7244db
JH
450 if (count && size)
451 ptr = (Malloc_t)PerlMem_calloc(count, size);
452 else /* calloc(0) is non-portable. */
453 ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1);
e8dda941 454#endif
da927450 455 PERL_ALLOC_CHECK(ptr);
22730398 456 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%" UVxf ": (%05ld) calloc %zu x %zu = %zu bytes\n",PTR2UV(ptr),(long)PL_an++, count, size, total_size));
bd61b366 457 if (ptr != NULL) {
3f07c2bc 458#ifdef USE_MDH
7cb608b5
NC
459 {
460 struct perl_memory_debug_header *const header
461 = (struct perl_memory_debug_header *)ptr;
462
b001a0d1 463# ifndef PERL_DEBUG_READONLY_COW
e1a95402 464 memset((void*)ptr, 0, total_size);
b001a0d1
FC
465# endif
466# ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
467 header->interpreter = aTHX;
468 /* Link us into the list. */
469 header->prev = &PL_memory_debug_header;
470 header->next = PL_memory_debug_header.next;
471 PL_memory_debug_header.next = header;
b001a0d1 472 maybe_protect_rw(header->next);
7cb608b5 473 header->next->prev = header;
b001a0d1
FC
474 maybe_protect_ro(header->next);
475# ifdef PERL_DEBUG_READONLY_COW
476 header->readonly = 0;
477# endif
478# endif
3f07c2bc 479# ifdef MDH_HAS_SIZE
e1a95402 480 header->size = total_size;
cd1541b2 481# endif
a78adc84 482 ptr = (Malloc_t)((char*)ptr+PERL_MEMORY_DEBUG_HEADER_SIZE);
7cb608b5 483 }
e8dda941 484#endif
1050c9ca
PP
485 return ptr;
486 }
0cb20dae 487 else {
1f4d2d4e 488#ifndef ALWAYS_NEED_THX
0cb20dae
NC
489 dTHX;
490#endif
491 if (PL_nomemok)
492 return NULL;
4cbe3a7d 493 croak_no_mem();
0cb20dae 494 }
1050c9ca
PP
495}
496
cae6d0e5
GS
497/* These must be defined when not using Perl's malloc for binary
498 * compatibility */
499
500#ifndef MYMALLOC
501
502Malloc_t Perl_malloc (MEM_SIZE nbytes)
503{
20b7effb
JH
504#ifdef PERL_IMPLICIT_SYS
505 dTHX;
506#endif
077a72a9 507 return (Malloc_t)PerlMem_malloc(nbytes);
cae6d0e5
GS
508}
509
510Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
511{
20b7effb
JH
512#ifdef PERL_IMPLICIT_SYS
513 dTHX;
514#endif
077a72a9 515 return (Malloc_t)PerlMem_calloc(elements, size);
cae6d0e5
GS
516}
517
518Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
519{
20b7effb
JH
520#ifdef PERL_IMPLICIT_SYS
521 dTHX;
522#endif
077a72a9 523 return (Malloc_t)PerlMem_realloc(where, nbytes);
cae6d0e5
GS
524}
525
526Free_t Perl_mfree (Malloc_t where)
527{
20b7effb
JH
528#ifdef PERL_IMPLICIT_SYS
529 dTHX;
530#endif
cae6d0e5
GS
531 PerlMem_free(where);
532}
533
534#endif
535
19e16554
DM
536/* copy a string up to some (non-backslashed) delimiter, if any.
537 * With allow_escape, converts \<delimiter> to <delimiter>, while leaves
538 * \<non-delimiter> as-is.
539 * Returns the position in the src string of the closing delimiter, if
540 * any, or returns fromend otherwise.
541 * This is the internal implementation for Perl_delimcpy and
542 * Perl_delimcpy_no_escape.
543 */
8d063cd8 544
ba0a4150 545static char *
31ee10f1 546S_delimcpy_intern(char *to, const char *toend, const char *from,
ba0a4150
FC
547 const char *fromend, int delim, I32 *retlen,
548 const bool allow_escape)
8d063cd8 549{
eb578fdb 550 I32 tolen;
35da51f7 551
7918f24d
NC
552 PERL_ARGS_ASSERT_DELIMCPY;
553
fc36a67e 554 for (tolen = 0; from < fromend; from++, tolen++) {
19e16554 555 if (allow_escape && *from == '\\' && from + 1 < fromend) {
35da51f7 556 if (from[1] != delim) {
fc36a67e
PP
557 if (to < toend)
558 *to++ = *from;
559 tolen++;
fc36a67e 560 }
35da51f7 561 from++;
378cc40b 562 }
bedebaa5 563 else if (*from == delim)
8d063cd8 564 break;
fc36a67e
PP
565 if (to < toend)
566 *to++ = *from;
8d063cd8 567 }
bedebaa5
CS
568 if (to < toend)
569 *to = '\0';
fc36a67e 570 *retlen = tolen;
73d840c0 571 return (char *)from;
8d063cd8
LW
572}
573
ba0a4150
FC
574char *
575Perl_delimcpy(char *to, const char *toend, const char *from, const char *fromend, int delim, I32 *retlen)
576{
577 PERL_ARGS_ASSERT_DELIMCPY;
578
31ee10f1 579 return S_delimcpy_intern(to, toend, from, fromend, delim, retlen, 1);
ba0a4150
FC
580}
581
582char *
583Perl_delimcpy_no_escape(char *to, const char *toend, const char *from,
584 const char *fromend, int delim, I32 *retlen)
585{
586 PERL_ARGS_ASSERT_DELIMCPY_NO_ESCAPE;
587
31ee10f1 588 return S_delimcpy_intern(to, toend, from, fromend, delim, retlen, 0);
ba0a4150
FC
589}
590
fcfc5a27
KW
591/*
592=head1 Miscellaneous Functions
593
44170c9a 594=for apidoc ninstr
fcfc5a27
KW
595
596Find the first (leftmost) occurrence of a sequence of bytes within another
597sequence. This is the Perl version of C<strstr()>, extended to handle
598arbitrary sequences, potentially containing embedded C<NUL> characters (C<NUL>
599is what the initial C<n> in the function name stands for; some systems have an
600equivalent, C<memmem()>, but with a somewhat different API).
601
602Another way of thinking about this function is finding a needle in a haystack.
603C<big> points to the first byte in the haystack. C<big_end> points to one byte
604beyond the final byte in the haystack. C<little> points to the first byte in
605the needle. C<little_end> points to one byte beyond the final byte in the
606needle. All the parameters must be non-C<NULL>.
607
608The function returns C<NULL> if there is no occurrence of C<little> within
609C<big>. If C<little> is the empty string, C<big> is returned.
610
611Because this function operates at the byte level, and because of the inherent
612characteristics of UTF-8 (or UTF-EBCDIC), it will work properly if both the
613needle and the haystack are strings with the same UTF-8ness, but not if the
614UTF-8ness differs.
615
616=cut
617
618*/
a687059c
LW
619
620char *
04c9e624 621Perl_ninstr(const char *big, const char *bigend, const char *little, const char *lend)
8d063cd8 622{
7918f24d 623 PERL_ARGS_ASSERT_NINSTR;
b8070b07
KW
624
625#ifdef HAS_MEMMEM
626 return ninstr(big, bigend, little, lend);
627#else
628
4c8626be
GA
629 if (little >= lend)
630 return (char*)big;
631 {
8ba22ff4 632 const char first = *little;
8ba22ff4 633 bigend -= lend - little++;
4c8626be
GA
634 OUTER:
635 while (big <= bigend) {
b0ca24ee 636 if (*big++ == first) {
19742f39 637 const char *s, *x;
b0ca24ee
JH
638 for (x=big,s=little; s < lend; x++,s++) {
639 if (*s != *x)
640 goto OUTER;
641 }
642 return (char*)(big-1);
4c8626be 643 }
4c8626be 644 }
378cc40b 645 }
bd61b366 646 return NULL;
b8070b07
KW
647
648#endif
649
a687059c
LW
650}
651
fcfc5a27
KW
652/*
653=head1 Miscellaneous Functions
654
44170c9a 655=for apidoc rninstr
fcfc5a27
KW
656
657Like C<L</ninstr>>, but instead finds the final (rightmost) occurrence of a
658sequence of bytes within another sequence, returning C<NULL> if there is no
659such occurrence.
660
661=cut
662
663*/
a687059c
LW
664
665char *
5aaab254 666Perl_rninstr(const char *big, const char *bigend, const char *little, const char *lend)
a687059c 667{
eb578fdb
KW
668 const char *bigbeg;
669 const I32 first = *little;
670 const char * const littleend = lend;
a687059c 671
7918f24d
NC
672 PERL_ARGS_ASSERT_RNINSTR;
673
260d78c9 674 if (little >= littleend)
08105a92 675 return (char*)bigend;
a687059c
LW
676 bigbeg = big;
677 big = bigend - (littleend - little++);
678 while (big >= bigbeg) {
eb578fdb 679 const char *s, *x;
a687059c
LW
680 if (*big-- != first)
681 continue;
682 for (x=big+2,s=little; s < littleend; /**/ ) {
4fc877ac 683 if (*s != *x)
a687059c 684 break;
4fc877ac
AL
685 else {
686 x++;
687 s++;
a687059c
LW
688 }
689 }
690 if (s >= littleend)
08105a92 691 return (char*)(big+1);
378cc40b 692 }
bd61b366 693 return NULL;
378cc40b 694}
a687059c 695
cf93c79d
IZ
696/* As a space optimization, we do not compile tables for strings of length
697 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
698 special-cased in fbm_instr().
699
700 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
701
954c1994 702/*
ccfc67b7
JH
703=head1 Miscellaneous Functions
704
954c1994
GS
705=for apidoc fbm_compile
706
41715441 707Analyzes the string in order to make fast searches on it using C<fbm_instr()>
954c1994
GS
708-- the Boyer-Moore algorithm.
709
710=cut
711*/
712
378cc40b 713void
7506f9c3 714Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 715{
eb578fdb 716 const U8 *s;
ea725ce6 717 STRLEN i;
0b71040e 718 STRLEN len;
79072805 719 U32 frequency = 256;
2bda37ba 720 MAGIC *mg;
00cccd05 721 PERL_DEB( STRLEN rarest = 0 );
79072805 722
7918f24d
NC
723 PERL_ARGS_ASSERT_FBM_COMPILE;
724
948d2370 725 if (isGV_with_GP(sv) || SvROK(sv))
4265b45d
NC
726 return;
727
9402563a
NC
728 if (SvVALID(sv))
729 return;
730
c517dc2b 731 if (flags & FBMcf_TAIL) {
890ce7af 732 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
396482e1 733 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
c517dc2b
JH
734 if (mg && mg->mg_len >= 0)
735 mg->mg_len++;
736 }
11609d9c 737 if (!SvPOK(sv) || SvNIOKp(sv))
66379c06
FC
738 s = (U8*)SvPV_force_mutable(sv, len);
739 else s = (U8 *)SvPV_mutable(sv, len);
d1be9408 740 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 741 return;
c13a5c80 742 SvUPGRADE(sv, SVt_PVMG);
78d0cf80 743 SvIOK_off(sv);
8eeaf79a 744 SvNOK_off(sv);
2bda37ba 745
a5c7cb08 746 /* add PERL_MAGIC_bm magic holding the FBM lookup table */
2bda37ba
NC
747
748 assert(!mg_find(sv, PERL_MAGIC_bm));
749 mg = sv_magicext(sv, NULL, PERL_MAGIC_bm, &PL_vtbl_bm, NULL, 0);
750 assert(mg);
751
02128f11 752 if (len > 2) {
21aeb718
NC
753 /* Shorter strings are special-cased in Perl_fbm_instr(), and don't use
754 the BM table. */
66a1b24b 755 const U8 mlen = (len>255) ? 255 : (U8)len;
2bda37ba 756 const unsigned char *const sb = s + len - mlen; /* first char (maybe) */
eb578fdb 757 U8 *table;
cf93c79d 758
2bda37ba 759 Newx(table, 256, U8);
7506f9c3 760 memset((void*)table, mlen, 256);
2bda37ba
NC
761 mg->mg_ptr = (char *)table;
762 mg->mg_len = 256;
763
764 s += len - 1; /* last char */
02128f11 765 i = 0;
cf93c79d
IZ
766 while (s >= sb) {
767 if (table[*s] == mlen)
7506f9c3 768 table[*s] = (U8)i;
cf93c79d
IZ
769 s--, i++;
770 }
378cc40b 771 }
378cc40b 772
9cbe880b 773 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 774 for (i = 0; i < len; i++) {
22c35a8c 775 if (PL_freq[s[i]] < frequency) {
00cccd05 776 PERL_DEB( rarest = i );
22c35a8c 777 frequency = PL_freq[s[i]];
378cc40b
LW
778 }
779 }
cf93c79d 780 BmUSEFUL(sv) = 100; /* Initial value */
b4204fb6 781 ((XPVNV*)SvANY(sv))->xnv_u.xnv_bm_tail = cBOOL(flags & FBMcf_TAIL);
147e3846 782 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %" UVuf "\n",
d80cf470 783 s[rarest], (UV)rarest));
378cc40b
LW
784}
785
cf93c79d 786
954c1994
GS
787/*
788=for apidoc fbm_instr
789
3f4963df 790Returns the location of the SV in the string delimited by C<big> and
41c8d07a
DM
791C<bigend> (C<bigend>) is the char following the last char).
792It returns C<NULL> if the string can't be found. The C<sv>
796b6530 793does not have to be C<fbm_compiled>, but the search will not be as fast
954c1994
GS
794then.
795
796=cut
41c8d07a
DM
797
798If SvTAIL(littlestr) is true, a fake "\n" was appended to to the string
799during FBM compilation due to FBMcf_TAIL in flags. It indicates that
800the littlestr must be anchored to the end of bigstr (or to any \n if
801FBMrf_MULTILINE).
802
803E.g. The regex compiler would compile /abc/ to a littlestr of "abc",
804while /abc$/ compiles to "abc\n" with SvTAIL() true.
805
806A littlestr of "abc", !SvTAIL matches as /abc/;
807a littlestr of "ab\n", SvTAIL matches as:
808 without FBMrf_MULTILINE: /ab\n?\z/
809 with FBMrf_MULTILINE: /ab\n/ || /ab\z/;
810
811(According to Ilya from 1999; I don't know if this is still true, DAPM 2015):
812 "If SvTAIL is actually due to \Z or \z, this gives false positives
813 if multiline".
954c1994
GS
814*/
815
41c8d07a 816
378cc40b 817char *
5aaab254 818Perl_fbm_instr(pTHX_ unsigned char *big, unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 819{
eb578fdb 820 unsigned char *s;
cf93c79d 821 STRLEN l;
eb578fdb
KW
822 const unsigned char *little = (const unsigned char *)SvPV_const(littlestr,l);
823 STRLEN littlelen = l;
824 const I32 multiline = flags & FBMrf_MULTILINE;
4e8879f3
DM
825 bool valid = SvVALID(littlestr);
826 bool tail = valid ? cBOOL(SvTAIL(littlestr)) : FALSE;
cf93c79d 827
7918f24d
NC
828 PERL_ARGS_ASSERT_FBM_INSTR;
829
bb152a4b
DM
830 assert(bigend >= big);
831
eb160463 832 if ((STRLEN)(bigend - big) < littlelen) {
e08d24ff 833 if ( tail
eb160463 834 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 835 && (littlelen == 1
12ae5dfc 836 || (*big == *little &&
27da23d5 837 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d 838 return (char*)big;
bd61b366 839 return NULL;
cf93c79d 840 }
378cc40b 841
21aeb718
NC
842 switch (littlelen) { /* Special cases for 0, 1 and 2 */
843 case 0:
844 return (char*)big; /* Cannot be SvTAIL! */
41c8d07a 845
21aeb718 846 case 1:
e08d24ff 847 if (tail && !multiline) /* Anchor only! */
147f21b5
DM
848 /* [-1] is safe because we know that bigend != big. */
849 return (char *) (bigend - (bigend[-1] == '\n'));
850
851 s = (unsigned char *)memchr((void*)big, *little, bigend-big);
852 if (s)
853 return (char *)s;
e08d24ff 854 if (tail)
cf93c79d 855 return (char *) bigend;
bd61b366 856 return NULL;
41c8d07a 857
21aeb718 858 case 2:
e08d24ff 859 if (tail && !multiline) {
147f21b5
DM
860 /* a littlestr with SvTAIL must be of the form "X\n" (where X
861 * is a single char). It is anchored, and can only match
862 * "....X\n" or "....X" */
863 if (bigend[-2] == *little && bigend[-1] == '\n')
cf93c79d
IZ
864 return (char*)bigend - 2;
865 if (bigend[-1] == *little)
866 return (char*)bigend - 1;
bd61b366 867 return NULL;
cf93c79d 868 }
147f21b5 869
cf93c79d 870 {
147f21b5
DM
871 /* memchr() is likely to be very fast, possibly using whatever
872 * hardware support is available, such as checking a whole
873 * cache line in one instruction.
874 * So for a 2 char pattern, calling memchr() is likely to be
875 * faster than running FBM, or rolling our own. The previous
876 * version of this code was roll-your-own which typically
877 * only needed to read every 2nd char, which was good back in
878 * the day, but no longer.
879 */
880 unsigned char c1 = little[0];
881 unsigned char c2 = little[1];
882
883 /* *** for all this case, bigend points to the last char,
884 * not the trailing \0: this makes the conditions slightly
885 * simpler */
886 bigend--;
887 s = big;
888 if (c1 != c2) {
889 while (s < bigend) {
890 /* do a quick test for c1 before calling memchr();
891 * this avoids the expensive fn call overhead when
892 * there are lots of c1's */
893 if (LIKELY(*s != c1)) {
894 s++;
895 s = (unsigned char *)memchr((void*)s, c1, bigend - s);
896 if (!s)
897 break;
898 }
899 if (s[1] == c2)
900 return (char*)s;
901
902 /* failed; try searching for c2 this time; that way
903 * we don't go pathologically slow when the string
904 * consists mostly of c1's or vice versa.
905 */
906 s += 2;
907 if (s > bigend)
908 break;
909 s = (unsigned char *)memchr((void*)s, c2, bigend - s + 1);
910 if (!s)
911 break;
912 if (s[-1] == c1)
913 return (char*)s - 1;
914 }
915 }
916 else {
917 /* c1, c2 the same */
918 while (s < bigend) {
919 if (s[0] == c1) {
920 got_1char:
921 if (s[1] == c1)
922 return (char*)s;
923 s += 2;
924 }
925 else {
926 s++;
927 s = (unsigned char *)memchr((void*)s, c1, bigend - s);
928 if (!s || s >= bigend)
929 break;
930 goto got_1char;
931 }
932 }
933 }
934
935 /* failed to find 2 chars; try anchored match at end without
936 * the \n */
e08d24ff 937 if (tail && bigend[0] == little[0])
147f21b5
DM
938 return (char *)bigend;
939 return NULL;
940 }
41c8d07a 941
21aeb718
NC
942 default:
943 break; /* Only lengths 0 1 and 2 have special-case code. */
d48672a2 944 }
21aeb718 945
e08d24ff 946 if (tail && !multiline) { /* tail anchored? */
bbce6d69 947 s = bigend - littlelen;
a1d180c4 948 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ
949 /* Automatically of length > 2 */
950 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 951 {
bbce6d69 952 return (char*)s; /* how sweet it is */
7506f9c3
GS
953 }
954 if (s[1] == *little
955 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
956 {
cf93c79d 957 return (char*)s + 1; /* how sweet it is */
7506f9c3 958 }
bd61b366 959 return NULL;
02128f11 960 }
41c8d07a 961
4e8879f3 962 if (!valid) {
147f21b5 963 /* not compiled; use Perl_ninstr() instead */
c4420975 964 char * const b = ninstr((char*)big,(char*)bigend,
cf93c79d
IZ
965 (char*)little, (char*)little + littlelen);
966
add424da 967 assert(!tail); /* valid => FBM; tail only set on SvVALID SVs */
cf93c79d 968 return b;
a687059c 969 }
a1d180c4 970
3566a07d
NC
971 /* Do actual FBM. */
972 if (littlelen > (STRLEN)(bigend - big))
973 return NULL;
974
975 {
2bda37ba 976 const MAGIC *const mg = mg_find(littlestr, PERL_MAGIC_bm);
eb578fdb 977 const unsigned char *oldlittle;
cf93c79d 978
316ebaf2
JH
979 assert(mg);
980
cf93c79d
IZ
981 --littlelen; /* Last char found by table lookup */
982
983 s = big + littlelen;
984 little += littlelen; /* last char */
985 oldlittle = little;
986 if (s < bigend) {
316ebaf2 987 const unsigned char * const table = (const unsigned char *) mg->mg_ptr;
147f21b5 988 const unsigned char lastc = *little;
eb578fdb 989 I32 tmp;
cf93c79d
IZ
990
991 top2:
7506f9c3 992 if ((tmp = table[*s])) {
147f21b5
DM
993 /* *s != lastc; earliest position it could match now is
994 * tmp slots further on */
995 if ((s += tmp) >= bigend)
996 goto check_end;
997 if (LIKELY(*s != lastc)) {
998 s++;
999 s = (unsigned char *)memchr((void*)s, lastc, bigend - s);
1000 if (!s) {
1001 s = bigend;
1002 goto check_end;
1003 }
1004 goto top2;
1005 }
cf93c79d 1006 }
147f21b5
DM
1007
1008
1009 /* hand-rolled strncmp(): less expensive than calling the
1010 * real function (maybe???) */
1011 {
eb578fdb 1012 unsigned char * const olds = s;
cf93c79d
IZ
1013
1014 tmp = littlelen;
1015
1016 while (tmp--) {
1017 if (*--s == *--little)
1018 continue;
cf93c79d
IZ
1019 s = olds + 1; /* here we pay the price for failure */
1020 little = oldlittle;
1021 if (s < bigend) /* fake up continue to outer loop */
1022 goto top2;
1023 goto check_end;
1024 }
1025 return (char *)s;
a687059c 1026 }
378cc40b 1027 }
cf93c79d 1028 check_end:
c8029a41 1029 if ( s == bigend
e08d24ff 1030 && tail
12ae5dfc
JH
1031 && memEQ((char *)(bigend - littlelen),
1032 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d 1033 return (char*)bigend - littlelen;
bd61b366 1034 return NULL;
378cc40b 1035 }
378cc40b
LW
1036}
1037
8d063cd8
LW
1038/* copy a string to a safe spot */
1039
954c1994 1040/*
ccfc67b7
JH
1041=head1 Memory Management
1042
954c1994
GS
1043=for apidoc savepv
1044
72d33970
FC
1045Perl's version of C<strdup()>. Returns a pointer to a newly allocated
1046string which is a duplicate of C<pv>. The size of the string is
30a15352
KW
1047determined by C<strlen()>, which means it may not contain embedded C<NUL>
1048characters and must have a trailing C<NUL>. The memory allocated for the new
1049string can be freed with the C<Safefree()> function.
954c1994 1050
0358c255
KW
1051On some platforms, Windows for example, all allocated memory owned by a thread
1052is deallocated when that thread ends. So if you need that not to happen, you
1053need to use the shared memory functions, such as C<L</savesharedpv>>.
1054
954c1994
GS
1055=cut
1056*/
1057
8d063cd8 1058char *
efdfce31 1059Perl_savepv(pTHX_ const char *pv)
8d063cd8 1060{
96a5add6 1061 PERL_UNUSED_CONTEXT;
e90e2364 1062 if (!pv)
bd61b366 1063 return NULL;
66a1b24b
AL
1064 else {
1065 char *newaddr;
1066 const STRLEN pvlen = strlen(pv)+1;
10edeb5d
JH
1067 Newx(newaddr, pvlen, char);
1068 return (char*)memcpy(newaddr, pv, pvlen);
66a1b24b 1069 }
8d063cd8
LW
1070}
1071
a687059c
LW
1072/* same thing but with a known length */
1073
954c1994
GS
1074/*
1075=for apidoc savepvn
1076
72d33970 1077Perl's version of what C<strndup()> would be if it existed. Returns a
61a925ed 1078pointer to a newly allocated string which is a duplicate of the first
72d33970 1079C<len> bytes from C<pv>, plus a trailing
6602b933 1080C<NUL> byte. The memory allocated for
cbf82dd0 1081the new string can be freed with the C<Safefree()> function.
954c1994 1082
0358c255
KW
1083On some platforms, Windows for example, all allocated memory owned by a thread
1084is deallocated when that thread ends. So if you need that not to happen, you
1085need to use the shared memory functions, such as C<L</savesharedpvn>>.
1086
954c1994
GS
1087=cut
1088*/
1089
a687059c 1090char *
5aaab254 1091Perl_savepvn(pTHX_ const char *pv, I32 len)
a687059c 1092{
eb578fdb 1093 char *newaddr;
96a5add6 1094 PERL_UNUSED_CONTEXT;
a687059c 1095
223f01db
KW
1096 assert(len >= 0);
1097
a02a5408 1098 Newx(newaddr,len+1,char);
92110913 1099 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 1100 if (pv) {
e90e2364
NC
1101 /* might not be null terminated */
1102 newaddr[len] = '\0';
07409e01 1103 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS
1104 }
1105 else {
07409e01 1106 return (char *) ZeroD(newaddr,len+1,char);
92110913 1107 }
a687059c
LW
1108}
1109
05ec9bb3
NIS
1110/*
1111=for apidoc savesharedpv
1112
61a925ed
AMS
1113A version of C<savepv()> which allocates the duplicate string in memory
1114which is shared between threads.
05ec9bb3
NIS
1115
1116=cut
1117*/
1118char *
efdfce31 1119Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 1120{
eb578fdb 1121 char *newaddr;
490a0e98 1122 STRLEN pvlen;
dc3bf405
BF
1123
1124 PERL_UNUSED_CONTEXT;
1125
e90e2364 1126 if (!pv)
bd61b366 1127 return NULL;
e90e2364 1128
490a0e98
NC
1129 pvlen = strlen(pv)+1;
1130 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364 1131 if (!newaddr) {
4cbe3a7d 1132 croak_no_mem();
05ec9bb3 1133 }
10edeb5d 1134 return (char*)memcpy(newaddr, pv, pvlen);
05ec9bb3
NIS
1135}
1136
2e0de35c 1137/*
d9095cec
NC
1138=for apidoc savesharedpvn
1139
1140A version of C<savepvn()> which allocates the duplicate string in memory
796b6530 1141which is shared between threads. (With the specific difference that a C<NULL>
d9095cec
NC
1142pointer is not acceptable)
1143
1144=cut
1145*/
1146char *
1147Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
1148{
1149 char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
7918f24d 1150
dc3bf405 1151 PERL_UNUSED_CONTEXT;
6379d4a9 1152 /* PERL_ARGS_ASSERT_SAVESHAREDPVN; */
7918f24d 1153
d9095cec 1154 if (!newaddr) {
4cbe3a7d 1155 croak_no_mem();
d9095cec
NC
1156 }
1157 newaddr[len] = '\0';
1158 return (char*)memcpy(newaddr, pv, len);
1159}
1160
1161/*
2e0de35c
NC
1162=for apidoc savesvpv
1163
6832267f 1164A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC
1165the passed in SV using C<SvPV()>
1166
0358c255
KW
1167On some platforms, Windows for example, all allocated memory owned by a thread
1168is deallocated when that thread ends. So if you need that not to happen, you
1169need to use the shared memory functions, such as C<L</savesharedsvpv>>.
1170
2e0de35c
NC
1171=cut
1172*/
1173
1174char *
1175Perl_savesvpv(pTHX_ SV *sv)
1176{
1177 STRLEN len;
7452cf6a 1178 const char * const pv = SvPV_const(sv, len);
eb578fdb 1179 char *newaddr;
2e0de35c 1180
7918f24d
NC
1181 PERL_ARGS_ASSERT_SAVESVPV;
1182
26866f99 1183 ++len;
a02a5408 1184 Newx(newaddr,len,char);
07409e01 1185 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 1186}
05ec9bb3 1187
9dcc53ea
Z
1188/*
1189=for apidoc savesharedsvpv
1190
1191A version of C<savesharedpv()> which allocates the duplicate string in
1192memory which is shared between threads.
1193
1194=cut
1195*/
1196
1197char *
1198Perl_savesharedsvpv(pTHX_ SV *sv)
1199{
1200 STRLEN len;
1201 const char * const pv = SvPV_const(sv, len);
1202
1203 PERL_ARGS_ASSERT_SAVESHAREDSVPV;
1204
1205 return savesharedpvn(pv, len);
1206}
05ec9bb3 1207
cea2e8a9 1208/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 1209
76e3520e 1210STATIC SV *
cea2e8a9 1211S_mess_alloc(pTHX)
fc36a67e
PP
1212{
1213 SV *sv;
1214 XPVMG *any;
1215
627364f1 1216 if (PL_phase != PERL_PHASE_DESTRUCT)
84bafc02 1217 return newSVpvs_flags("", SVs_TEMP);
e72dc28c 1218
0372dbb6
GS
1219 if (PL_mess_sv)
1220 return PL_mess_sv;
1221
fc36a67e 1222 /* Create as PVMG now, to avoid any upgrading later */
a02a5408
JC
1223 Newx(sv, 1, SV);
1224 Newxz(any, 1, XPVMG);
fc36a67e
PP
1225 SvFLAGS(sv) = SVt_PVMG;
1226 SvANY(sv) = (void*)any;
6136c704 1227 SvPV_set(sv, NULL);
fc36a67e 1228 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 1229 PL_mess_sv = sv;
fc36a67e
PP
1230 return sv;
1231}
1232
c5be433b 1233#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1234char *
1235Perl_form_nocontext(const char* pat, ...)
1236{
1237 dTHX;
c5be433b 1238 char *retval;
cea2e8a9 1239 va_list args;
7918f24d 1240 PERL_ARGS_ASSERT_FORM_NOCONTEXT;
cea2e8a9 1241 va_start(args, pat);
c5be433b 1242 retval = vform(pat, &args);
cea2e8a9 1243 va_end(args);
c5be433b 1244 return retval;
cea2e8a9 1245}
c5be433b 1246#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1247
7c9e965c 1248/*
ccfc67b7 1249=head1 Miscellaneous Functions
7c9e965c
JP
1250=for apidoc form
1251
1252Takes a sprintf-style format pattern and conventional
1253(non-SV) arguments and returns the formatted string.
1254
1255 (char *) Perl_form(pTHX_ const char* pat, ...)
1256
1257can be used any place a string (char *) is required:
1258
1259 char * s = Perl_form("%d.%d",major,minor);
1260
1261Uses a single private buffer so if you want to format several strings you
1262must explicitly copy the earlier strings away (and free the copies when you
1263are done).
1264
1265=cut
1266*/
1267
8990e307 1268char *
864dbfa3 1269Perl_form(pTHX_ const char* pat, ...)
8990e307 1270{
c5be433b 1271 char *retval;
46fc3d4c 1272 va_list args;
7918f24d 1273 PERL_ARGS_ASSERT_FORM;
46fc3d4c 1274 va_start(args, pat);
c5be433b 1275 retval = vform(pat, &args);
46fc3d4c 1276 va_end(args);
c5be433b
GS
1277 return retval;
1278}
1279
1280char *
1281Perl_vform(pTHX_ const char *pat, va_list *args)
1282{
2d03de9c 1283 SV * const sv = mess_alloc();
7918f24d 1284 PERL_ARGS_ASSERT_VFORM;
4608196e 1285 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
e72dc28c 1286 return SvPVX(sv);
46fc3d4c 1287}
a687059c 1288
c5df3096 1289/*
44170c9a 1290=for apidoc mess
c5df3096
Z
1291
1292Take a sprintf-style format pattern and argument list. These are used to
1293generate a string message. If the message does not end with a newline,
1294then it will be extended with some indication of the current location
1295in the code, as described for L</mess_sv>.
1296
1297Normally, the resulting message is returned in a new mortal SV.
1298During global destruction a single SV may be shared between uses of
1299this function.
1300
1301=cut
1302*/
1303
5a844595
GS
1304#if defined(PERL_IMPLICIT_CONTEXT)
1305SV *
1306Perl_mess_nocontext(const char *pat, ...)
1307{
1308 dTHX;
1309 SV *retval;
1310 va_list args;
7918f24d 1311 PERL_ARGS_ASSERT_MESS_NOCONTEXT;
5a844595
GS
1312 va_start(args, pat);
1313 retval = vmess(pat, &args);
1314 va_end(args);
1315 return retval;
1316}
1317#endif /* PERL_IMPLICIT_CONTEXT */
1318
06bf62c7 1319SV *
5a844595
GS
1320Perl_mess(pTHX_ const char *pat, ...)
1321{
1322 SV *retval;
1323 va_list args;
7918f24d 1324 PERL_ARGS_ASSERT_MESS;
5a844595
GS
1325 va_start(args, pat);
1326 retval = vmess(pat, &args);
1327 va_end(args);
1328 return retval;
1329}
1330
25502127
FC
1331const COP*
1332Perl_closest_cop(pTHX_ const COP *cop, const OP *o, const OP *curop,
1333 bool opnext)
ae7d165c 1334{
25502127
FC
1335 /* Look for curop starting from o. cop is the last COP we've seen. */
1336 /* opnext means that curop is actually the ->op_next of the op we are
1337 seeking. */
ae7d165c 1338
7918f24d
NC
1339 PERL_ARGS_ASSERT_CLOSEST_COP;
1340
25502127
FC
1341 if (!o || !curop || (
1342 opnext ? o->op_next == curop && o->op_type != OP_SCOPE : o == curop
1343 ))
fabdb6c0 1344 return cop;
ae7d165c
PJ
1345
1346 if (o->op_flags & OPf_KIDS) {
5f66b61c 1347 const OP *kid;
e6dae479 1348 for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
5f66b61c 1349 const COP *new_cop;
ae7d165c
PJ
1350
1351 /* If the OP_NEXTSTATE has been optimised away we can still use it
1352 * the get the file and line number. */
1353
1354 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
5f66b61c 1355 cop = (const COP *)kid;
ae7d165c
PJ
1356
1357 /* Keep searching, and return when we've found something. */
1358
25502127 1359 new_cop = closest_cop(cop, kid, curop, opnext);
fabdb6c0
AL
1360 if (new_cop)
1361 return new_cop;
ae7d165c
PJ
1362 }
1363 }
1364
1365 /* Nothing found. */
1366
5f66b61c 1367 return NULL;
ae7d165c
PJ
1368}
1369
c5df3096 1370/*
44170c9a 1371=for apidoc mess_sv
c5df3096
Z
1372
1373Expands a message, intended for the user, to include an indication of
1374the current location in the code, if the message does not already appear
1375to be complete.
1376
1377C<basemsg> is the initial message or object. If it is a reference, it
1378will be used as-is and will be the result of this function. Otherwise it
1379is used as a string, and if it already ends with a newline, it is taken
1380to be complete, and the result of this function will be the same string.
1381If the message does not end with a newline, then a segment such as C<at
1382foo.pl line 37> will be appended, and possibly other clauses indicating
1383the current state of execution. The resulting message will end with a
1384dot and a newline.
1385
1386Normally, the resulting message is returned in a new mortal SV.
1387During global destruction a single SV may be shared between uses of this
1388function. If C<consume> is true, then the function is permitted (but not
1389required) to modify and return C<basemsg> instead of allocating a new SV.
1390
1391=cut
1392*/
1393
5a844595 1394SV *
c5df3096 1395Perl_mess_sv(pTHX_ SV *basemsg, bool consume)
46fc3d4c 1396{
c5df3096 1397 SV *sv;
46fc3d4c 1398
0762e42f 1399#if defined(USE_C_BACKTRACE) && defined(USE_C_BACKTRACE_ON_ERROR)
470dd224
JH
1400 {
1401 char *ws;
22ff3130 1402 UV wi;
470dd224 1403 /* The PERL_C_BACKTRACE_ON_WARN must be an integer of one or more. */
22ff3130
HS
1404 if ((ws = PerlEnv_getenv("PERL_C_BACKTRACE_ON_ERROR"))
1405 && grok_atoUV(ws, &wi, NULL)
1406 && wi <= PERL_INT_MAX
1407 ) {
1408 Perl_dump_c_backtrace(aTHX_ Perl_debug_log, (int)wi, 1);
470dd224
JH
1409 }
1410 }
1411#endif
1412
c5df3096
Z
1413 PERL_ARGS_ASSERT_MESS_SV;
1414
1415 if (SvROK(basemsg)) {
1416 if (consume) {
1417 sv = basemsg;
1418 }
1419 else {
1420 sv = mess_alloc();
1421 sv_setsv(sv, basemsg);
1422 }
1423 return sv;
1424 }
1425
1426 if (SvPOK(basemsg) && consume) {
1427 sv = basemsg;
1428 }
1429 else {
1430 sv = mess_alloc();
1431 sv_copypv(sv, basemsg);
1432 }
7918f24d 1433
46fc3d4c 1434 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ
1435 /*
1436 * Try and find the file and line for PL_op. This will usually be
1437 * PL_curcop, but it might be a cop that has been optimised away. We
1438 * can try to find such a cop by searching through the optree starting
1439 * from the sibling of PL_curcop.
1440 */
1441
f4c61774
DM
1442 if (PL_curcop) {
1443 const COP *cop =
1444 closest_cop(PL_curcop, OpSIBLING(PL_curcop), PL_op, FALSE);
1445 if (!cop)
1446 cop = PL_curcop;
1447
1448 if (CopLINE(cop))
1449 Perl_sv_catpvf(aTHX_ sv, " at %s line %" IVdf,
1450 OutCopFILE(cop), (IV)CopLINE(cop));
1451 }
1452
191f87d5
DH
1453 /* Seems that GvIO() can be untrustworthy during global destruction. */
1454 if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO)
1455 && IoLINES(GvIOp(PL_last_in_gv)))
1456 {
2748e602 1457 STRLEN l;
e1ec3a88 1458 const bool line_mode = (RsSIMPLE(PL_rs) &&
2748e602 1459 *SvPV_const(PL_rs,l) == '\n' && l == 1);
147e3846 1460 Perl_sv_catpvf(aTHX_ sv, ", <%" SVf "> %s %" IVdf,
3b46b707
BF
1461 SVfARG(PL_last_in_gv == PL_argvgv
1462 ? &PL_sv_no
1463 : sv_2mortal(newSVhek(GvNAME_HEK(PL_last_in_gv)))),
edc2eac3
JH
1464 line_mode ? "line" : "chunk",
1465 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1466 }
627364f1 1467 if (PL_phase == PERL_PHASE_DESTRUCT)
5f66b61c
AL
1468 sv_catpvs(sv, " during global destruction");
1469 sv_catpvs(sv, ".\n");
a687059c 1470 }
06bf62c7 1471 return sv;
a687059c
LW
1472}
1473
c5df3096 1474/*
44170c9a 1475=for apidoc vmess
c5df3096
Z
1476
1477C<pat> and C<args> are a sprintf-style format pattern and encapsulated
801caa78
KW
1478argument list, respectively. These are used to generate a string message. If
1479the
c5df3096
Z
1480message does not end with a newline, then it will be extended with
1481some indication of the current location in the code, as described for
1482L</mess_sv>.
1483
1484Normally, the resulting message is returned in a new mortal SV.
1485During global destruction a single SV may be shared between uses of
1486this function.
1487
1488=cut
1489*/
1490
1491SV *
1492Perl_vmess(pTHX_ const char *pat, va_list *args)
1493{
c5df3096
Z
1494 SV * const sv = mess_alloc();
1495
1496 PERL_ARGS_ASSERT_VMESS;
1497
1498 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1499 return mess_sv(sv, 1);
1500}
1501
7ff03255 1502void
7d0994e0 1503Perl_write_to_stderr(pTHX_ SV* msv)
7ff03255
SG
1504{
1505 IO *io;
1506 MAGIC *mg;
1507
7918f24d
NC
1508 PERL_ARGS_ASSERT_WRITE_TO_STDERR;
1509
7ff03255
SG
1510 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1511 && (io = GvIO(PL_stderrgv))
daba3364 1512 && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
36925d9e 1513 Perl_magic_methcall(aTHX_ MUTABLE_SV(io), mg, SV_CONST(PRINT),
d1d7a15d 1514 G_SCALAR | G_DISCARD | G_WRITING_TO_STDERR, 1, msv);
7ff03255 1515 else {
53c1dcc0 1516 PerlIO * const serr = Perl_error_log;
7ff03255 1517
83c55556 1518 do_print(msv, serr);
7ff03255 1519 (void)PerlIO_flush(serr);
7ff03255
SG
1520 }
1521}
1522
c5df3096
Z
1523/*
1524=head1 Warning and Dieing
1525*/
1526
1527/* Common code used in dieing and warning */
1528
1529STATIC SV *
1530S_with_queued_errors(pTHX_ SV *ex)
1531{
1532 PERL_ARGS_ASSERT_WITH_QUEUED_ERRORS;
1533 if (PL_errors && SvCUR(PL_errors) && !SvROK(ex)) {
1534 sv_catsv(PL_errors, ex);
1535 ex = sv_mortalcopy(PL_errors);
1536 SvCUR_set(PL_errors, 0);
1537 }
1538 return ex;
1539}
3ab1ac99 1540
46d9c920 1541STATIC bool
c5df3096 1542S_invoke_exception_hook(pTHX_ SV *ex, bool warn)
63315e18 1543{
1565c085 1544 dVAR;
63315e18
NC
1545 HV *stash;
1546 GV *gv;
1547 CV *cv;
46d9c920
NC
1548 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1549 /* sv_2cv might call Perl_croak() or Perl_warner() */
1550 SV * const oldhook = *hook;
1551
2460a496 1552 if (!oldhook || oldhook == PERL_WARNHOOK_FATAL)
c5df3096 1553 return FALSE;
63315e18 1554
63315e18 1555 ENTER;
46d9c920
NC
1556 SAVESPTR(*hook);
1557 *hook = NULL;
1558 cv = sv_2cv(oldhook, &stash, &gv, 0);
63315e18
NC
1559 LEAVE;
1560 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1561 dSP;
c5df3096 1562 SV *exarg;
63315e18
NC
1563
1564 ENTER;
2782061f 1565 save_re_context();
46d9c920
NC
1566 if (warn) {
1567 SAVESPTR(*hook);
1568 *hook = NULL;
1569 }
c5df3096
Z
1570 exarg = newSVsv(ex);
1571 SvREADONLY_on(exarg);
1572 SAVEFREESV(exarg);
63315e18 1573
46d9c920 1574 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
63315e18 1575 PUSHMARK(SP);
c5df3096 1576 XPUSHs(exarg);
63315e18 1577 PUTBACK;
daba3364 1578 call_sv(MUTABLE_SV(cv), G_DISCARD);
63315e18
NC
1579 POPSTACK;
1580 LEAVE;
46d9c920 1581 return TRUE;
63315e18 1582 }
46d9c920 1583 return FALSE;
63315e18
NC
1584}
1585
c5df3096 1586/*
44170c9a 1587=for apidoc die_sv
e07360fa 1588
c5df3096
Z
1589Behaves the same as L</croak_sv>, except for the return type.
1590It should be used only where the C<OP *> return type is required.
1591The function never actually returns.
e07360fa 1592
c5df3096
Z
1593=cut
1594*/
e07360fa 1595
6879a07b
TK
1596/* silence __declspec(noreturn) warnings */
1597MSVC_DIAG_IGNORE(4646 4645)
c5df3096
Z
1598OP *
1599Perl_die_sv(pTHX_ SV *baseex)
36477c24 1600{
c5df3096
Z
1601 PERL_ARGS_ASSERT_DIE_SV;
1602 croak_sv(baseex);
e5964223 1603 /* NOTREACHED */
117af67d 1604 NORETURN_FUNCTION_END;
36477c24 1605}
6879a07b 1606MSVC_DIAG_RESTORE
36477c24 1607
c5df3096 1608/*
44170c9a 1609=for apidoc die
c5df3096
Z
1610
1611Behaves the same as L</croak>, except for the return type.
1612It should be used only where the C<OP *> return type is required.
1613The function never actually returns.
1614
1615=cut
1616*/
1617
c5be433b 1618#if defined(PERL_IMPLICIT_CONTEXT)
6879a07b
TK
1619
1620/* silence __declspec(noreturn) warnings */
1621MSVC_DIAG_IGNORE(4646 4645)
cea2e8a9
GS
1622OP *
1623Perl_die_nocontext(const char* pat, ...)
a687059c 1624{
cea2e8a9 1625 dTHX;
a687059c 1626 va_list args;
cea2e8a9 1627 va_start(args, pat);
c5df3096 1628 vcroak(pat, &args);
e5964223 1629 NOT_REACHED; /* NOTREACHED */
cea2e8a9 1630 va_end(args);
117af67d 1631 NORETURN_FUNCTION_END;
cea2e8a9 1632}
6879a07b
TK
1633MSVC_DIAG_RESTORE
1634
c5be433b 1635#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1636
6879a07b
TK
1637/* silence __declspec(noreturn) warnings */
1638MSVC_DIAG_IGNORE(4646 4645)
cea2e8a9
GS
1639OP *
1640Perl_die(pTHX_ const char* pat, ...)
1641{
cea2e8a9
GS
1642 va_list args;
1643 va_start(args, pat);
c5df3096 1644 vcroak(pat, &args);
e5964223 1645 NOT_REACHED; /* NOTREACHED */
cea2e8a9 1646 va_end(args);
117af67d 1647 NORETURN_FUNCTION_END;
cea2e8a9 1648}
6879a07b 1649MSVC_DIAG_RESTORE
cea2e8a9 1650
c5df3096 1651/*
44170c9a 1652=for apidoc croak_sv
c5df3096
Z
1653
1654This is an XS interface to Perl's C<die> function.
1655
1656C<baseex> is the error message or object. If it is a reference, it
1657will be used as-is. Otherwise it is used as a string, and if it does
1658not end with a newline then it will be extended with some indication of
1659the current location in the code, as described for L</mess_sv>.
1660
1661The error message or object will be used as an exception, by default
1662returning control to the nearest enclosing C<eval>, but subject to
1663modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak_sv>
1664function never returns normally.
1665
1666To die with a simple string message, the L</croak> function may be
1667more convenient.
1668
1669=cut
1670*/
1671
c5be433b 1672void
c5df3096 1673Perl_croak_sv(pTHX_ SV *baseex)
cea2e8a9 1674{
c5df3096
Z
1675 SV *ex = with_queued_errors(mess_sv(baseex, 0));
1676 PERL_ARGS_ASSERT_CROAK_SV;
1677 invoke_exception_hook(ex, FALSE);
1678 die_unwind(ex);
1679}
1680
1681/*
44170c9a 1682=for apidoc vcroak
c5df3096
Z
1683
1684This is an XS interface to Perl's C<die> function.
1685
1686C<pat> and C<args> are a sprintf-style format pattern and encapsulated
1687argument list. These are used to generate a string message. If the
1688message does not end with a newline, then it will be extended with
1689some indication of the current location in the code, as described for
1690L</mess_sv>.
1691
1692The error message will be used as an exception, by default
1693returning control to the nearest enclosing C<eval>, but subject to
1694modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak>
1695function never returns normally.
a687059c 1696
c5df3096
Z
1697For historical reasons, if C<pat> is null then the contents of C<ERRSV>
1698(C<$@>) will be used as an error message or object instead of building an
1699error message from arguments. If you want to throw a non-string object,
1700or build an error message in an SV yourself, it is preferable to use
1701the L</croak_sv> function, which does not involve clobbering C<ERRSV>.
5a844595 1702
c5df3096
Z
1703=cut
1704*/
1705
1706void
1707Perl_vcroak(pTHX_ const char* pat, va_list *args)
1708{
1709 SV *ex = with_queued_errors(pat ? vmess(pat, args) : mess_sv(ERRSV, 0));
1710 invoke_exception_hook(ex, FALSE);
1711 die_unwind(ex);
a687059c
LW
1712}
1713
c5df3096 1714/*
44170c9a 1715=for apidoc croak
c5df3096
Z
1716
1717This is an XS interface to Perl's C<die> function.
1718
1719Take a sprintf-style format pattern and argument list. These are used to
1720generate a string message. If the message does not end with a newline,
1721then it will be extended with some indication of the current location
1722in the code, as described for L</mess_sv>.
1723
1724The error message will be used as an exception, by default
1725returning control to the nearest enclosing C<eval>, but subject to
1726modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak>
1727function never returns normally.
1728
1729For historical reasons, if C<pat> is null then the contents of C<ERRSV>
1730(C<$@>) will be used as an error message or object instead of building an
1731error message from arguments. If you want to throw a non-string object,
1732or build an error message in an SV yourself, it is preferable to use
1733the L</croak_sv> function, which does not involve clobbering C<ERRSV>.
1734
1735=cut
1736*/
1737
c5be433b 1738#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1739void
cea2e8a9 1740Perl_croak_nocontext(const char *pat, ...)
a687059c 1741{
cea2e8a9 1742 dTHX;
a687059c 1743 va_list args;
cea2e8a9 1744 va_start(args, pat);
c5be433b 1745 vcroak(pat, &args);
e5964223 1746 NOT_REACHED; /* NOTREACHED */
cea2e8a9
GS
1747 va_end(args);
1748}
1749#endif /* PERL_IMPLICIT_CONTEXT */
1750
c5df3096
Z
1751void
1752Perl_croak(pTHX_ const char *pat, ...)
1753{
1754 va_list args;
1755 va_start(args, pat);
1756 vcroak(pat, &args);
e5964223 1757 NOT_REACHED; /* NOTREACHED */
c5df3096
Z
1758 va_end(args);
1759}
1760
954c1994 1761/*
44170c9a 1762=for apidoc croak_no_modify
6ad8f254
NC
1763
1764Exactly equivalent to C<Perl_croak(aTHX_ "%s", PL_no_modify)>, but generates
72d33970 1765terser object code than using C<Perl_croak>. Less code used on exception code
6ad8f254
NC
1766paths reduces CPU cache pressure.
1767
d8e47b5c 1768=cut
6ad8f254
NC
1769*/
1770
1771void
88772978 1772Perl_croak_no_modify(void)
6ad8f254 1773{
cb077ed2 1774 Perl_croak_nocontext( "%s", PL_no_modify);
6ad8f254
NC
1775}
1776
4cbe3a7d
DD
1777/* does not return, used in util.c perlio.c and win32.c
1778 This is typically called when malloc returns NULL.
1779*/
1780void
88772978 1781Perl_croak_no_mem(void)
4cbe3a7d
DD
1782{
1783 dTHX;
77c1c05b 1784
375ed12a
JH
1785 int fd = PerlIO_fileno(Perl_error_log);
1786 if (fd < 0)
1787 SETERRNO(EBADF,RMS_IFI);
1788 else {
1789 /* Can't use PerlIO to write as it allocates memory */
b469f1e0 1790 PERL_UNUSED_RESULT(PerlLIO_write(fd, PL_no_mem, sizeof(PL_no_mem)-1));
375ed12a 1791 }
4cbe3a7d
DD
1792 my_exit(1);
1793}
1794
3d04513d
DD
1795/* does not return, used only in POPSTACK */
1796void
1797Perl_croak_popstack(void)
1798{
1799 dTHX;
1800 PerlIO_printf(Perl_error_log, "panic: POPSTACK\n");
1801 my_exit(1);
1802}
1803
6ad8f254 1804/*
44170c9a 1805=for apidoc warn_sv
ccfc67b7 1806
c5df3096 1807This is an XS interface to Perl's C<warn> function.
954c1994 1808
c5df3096
Z
1809C<baseex> is the error message or object. If it is a reference, it
1810will be used as-is. Otherwise it is used as a string, and if it does
1811not end with a newline then it will be extended with some indication of
1812the current location in the code, as described for L</mess_sv>.
9983fa3c 1813
c5df3096
Z
1814The error message or object will by default be written to standard error,
1815but this is subject to modification by a C<$SIG{__WARN__}> handler.
9983fa3c 1816
c5df3096
Z
1817To warn with a simple string message, the L</warn> function may be
1818more convenient.
954c1994
GS
1819
1820=cut
1821*/
1822
cea2e8a9 1823void
c5df3096 1824Perl_warn_sv(pTHX_ SV *baseex)
cea2e8a9 1825{
c5df3096
Z
1826 SV *ex = mess_sv(baseex, 0);
1827 PERL_ARGS_ASSERT_WARN_SV;
1828 if (!invoke_exception_hook(ex, TRUE))
1829 write_to_stderr(ex);
cea2e8a9
GS
1830}
1831
c5df3096 1832/*
44170c9a 1833=for apidoc vwarn
c5df3096
Z
1834
1835This is an XS interface to Perl's C<warn> function.
1836
1837C<pat> and C<args> are a sprintf-style format pattern and encapsulated
1838argument list. These are used to generate a string message. If the
1839message does not end with a newline, then it will be extended with
1840some indication of the current location in the code, as described for
1841L</mess_sv>.
1842
1843The error message or object will by default be written to standard error,
1844but this is subject to modification by a C<$SIG{__WARN__}> handler.
1845
1846Unlike with L</vcroak>, C<pat> is not permitted to be null.
1847
1848=cut
1849*/
1850
c5be433b
GS
1851void
1852Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1853{
c5df3096 1854 SV *ex = vmess(pat, args);
7918f24d 1855 PERL_ARGS_ASSERT_VWARN;
c5df3096
Z
1856 if (!invoke_exception_hook(ex, TRUE))
1857 write_to_stderr(ex);
1858}
7918f24d 1859
c5df3096 1860/*
44170c9a 1861=for apidoc warn
87582a92 1862
c5df3096
Z
1863This is an XS interface to Perl's C<warn> function.
1864
1865Take a sprintf-style format pattern and argument list. These are used to
1866generate a string message. If the message does not end with a newline,
1867then it will be extended with some indication of the current location
1868in the code, as described for L</mess_sv>.
1869
1870The error message or object will by default be written to standard error,
1871but this is subject to modification by a C<$SIG{__WARN__}> handler.
1872
1873Unlike with L</croak>, C<pat> is not permitted to be null.
1874
1875=cut
1876*/
8d063cd8 1877
c5be433b 1878#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1879void
1880Perl_warn_nocontext(const char *pat, ...)
1881{
1882 dTHX;
1883 va_list args;
7918f24d 1884 PERL_ARGS_ASSERT_WARN_NOCONTEXT;
cea2e8a9 1885 va_start(args, pat);
c5be433b 1886 vwarn(pat, &args);
cea2e8a9
GS
1887 va_end(args);
1888}
1889#endif /* PERL_IMPLICIT_CONTEXT */
1890
1891void
1892Perl_warn(pTHX_ const char *pat, ...)
1893{
1894 va_list args;
7918f24d 1895 PERL_ARGS_ASSERT_WARN;
cea2e8a9 1896 va_start(args, pat);
c5be433b 1897 vwarn(pat, &args);
cea2e8a9
GS
1898 va_end(args);
1899}
1900
c5be433b
GS
1901#if defined(PERL_IMPLICIT_CONTEXT)
1902void
1903Perl_warner_nocontext(U32 err, const char *pat, ...)
1904{
27da23d5 1905 dTHX;
c5be433b 1906 va_list args;
7918f24d 1907 PERL_ARGS_ASSERT_WARNER_NOCONTEXT;
c5be433b
GS
1908 va_start(args, pat);
1909 vwarner(err, pat, &args);
1910 va_end(args);
1911}
1912#endif /* PERL_IMPLICIT_CONTEXT */
1913
599cee73 1914void
9b387841
NC
1915Perl_ck_warner_d(pTHX_ U32 err, const char* pat, ...)
1916{
1917 PERL_ARGS_ASSERT_CK_WARNER_D;
1918
1919 if (Perl_ckwarn_d(aTHX_ err)) {
1920 va_list args;
1921 va_start(args, pat);
1922 vwarner(err, pat, &args);
1923 va_end(args);
1924 }
1925}
1926
1927void
a2a5de95
NC
1928Perl_ck_warner(pTHX_ U32 err, const char* pat, ...)
1929{
1930 PERL_ARGS_ASSERT_CK_WARNER;
1931
1932 if (Perl_ckwarn(aTHX_ err)) {
1933 va_list args;
1934 va_start(args, pat);
1935 vwarner(err, pat, &args);
1936 va_end(args);
1937 }
1938}
1939
1940void
864dbfa3 1941Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM
1942{
1943 va_list args;
7918f24d 1944 PERL_ARGS_ASSERT_WARNER;
c5be433b
GS
1945 va_start(args, pat);
1946 vwarner(err, pat, &args);
1947 va_end(args);
1948}
1949
1950void
1951Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1952{
27da23d5 1953 dVAR;
7918f24d 1954 PERL_ARGS_ASSERT_VWARNER;
46b27d2f
LM
1955 if (
1956 (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) &&
1957 !(PL_in_eval & EVAL_KEEPERR)
1958 ) {
a3b680e6 1959 SV * const msv = vmess(pat, args);
599cee73 1960
594b6fac
LM
1961 if (PL_parser && PL_parser->error_count) {
1962 qerror(msv);
1963 }
1964 else {
1965 invoke_exception_hook(msv, FALSE);
1966 die_unwind(msv);
1967 }
599cee73
PM
1968 }
1969 else {
d13b0d77 1970 Perl_vwarn(aTHX_ pat, args);
599cee73
PM
1971 }
1972}
1973
f54ba1c2
DM
1974/* implements the ckWARN? macros */
1975
1976bool
1977Perl_ckwarn(pTHX_ U32 w)
1978{
ad287e37 1979 /* If lexical warnings have not been set, use $^W. */
3c3f8cd6
AB
1980 if (isLEXWARN_off)
1981 return PL_dowarn & G_WARN_ON;
ad287e37 1982
26c7b074 1983 return ckwarn_common(w);
f54ba1c2
DM
1984}
1985
1986/* implements the ckWARN?_d macro */
1987
1988bool
1989Perl_ckwarn_d(pTHX_ U32 w)
1990{
ad287e37 1991 /* If lexical warnings have not been set then default classes warn. */
3c3f8cd6
AB
1992 if (isLEXWARN_off)
1993 return TRUE;
ad287e37 1994
26c7b074
NC
1995 return ckwarn_common(w);
1996}
1997
1998static bool
1999S_ckwarn_common(pTHX_ U32 w)
2000{
3c3f8cd6
AB
2001 if (PL_curcop->cop_warnings == pWARN_ALL)
2002 return TRUE;
ad287e37
NC
2003
2004 if (PL_curcop->cop_warnings == pWARN_NONE)
2005 return FALSE;
2006
98fe6610
NC
2007 /* Check the assumption that at least the first slot is non-zero. */
2008 assert(unpackWARN1(w));
2009
2010 /* Check the assumption that it is valid to stop as soon as a zero slot is
2011 seen. */
2012 if (!unpackWARN2(w)) {
2013 assert(!unpackWARN3(w));
2014 assert(!unpackWARN4(w));
2015 } else if (!unpackWARN3(w)) {
2016 assert(!unpackWARN4(w));
2017 }
2018
26c7b074
NC
2019 /* Right, dealt with all the special cases, which are implemented as non-
2020 pointers, so there is a pointer to a real warnings mask. */
98fe6610
NC
2021 do {
2022 if (isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w)))
2023 return TRUE;
2024 } while (w >>= WARNshift);
2025
2026 return FALSE;
f54ba1c2
DM
2027}
2028
72dc9ed5
NC
2029/* Set buffer=NULL to get a new one. */
2030STRLEN *
8ee4cf24 2031Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
72dc9ed5 2032 STRLEN size) {
5af88345
FC
2033 const MEM_SIZE len_wanted =
2034 sizeof(STRLEN) + (size > WARNsize ? size : WARNsize);
35da51f7 2035 PERL_UNUSED_CONTEXT;
7918f24d 2036 PERL_ARGS_ASSERT_NEW_WARNINGS_BITFIELD;
72dc9ed5 2037
10edeb5d
JH
2038 buffer = (STRLEN*)
2039 (specialWARN(buffer) ?
2040 PerlMemShared_malloc(len_wanted) :
2041 PerlMemShared_realloc(buffer, len_wanted));
72dc9ed5
NC
2042 buffer[0] = size;
2043 Copy(bits, (buffer + 1), size, char);
5af88345
FC
2044 if (size < WARNsize)
2045 Zero((char *)(buffer + 1) + size, WARNsize - size, char);
72dc9ed5
NC
2046 return buffer;
2047}
f54ba1c2 2048
e6587932
DM
2049/* since we've already done strlen() for both nam and val
2050 * we can use that info to make things faster than
2051 * sprintf(s, "%s=%s", nam, val)
2052 */
2053#define my_setenv_format(s, nam, nlen, val, vlen) \
2054 Copy(nam, s, nlen, char); \
2055 *(s+nlen) = '='; \
2056 Copy(val, s+(nlen+1), vlen, char); \
2057 *(s+(nlen+1+vlen)) = '\0'
2058
adebb90d
DM
2059
2060
c5d12488 2061#ifdef USE_ENVIRON_ARRAY
de5576aa 2062/* NB: VMS' my_setenv() is in vms.c */
34716e2a 2063
3d50648c
DM
2064/* Configure doesn't test for HAS_SETENV yet, so decide based on platform.
2065 * For Solaris, setenv() and unsetenv() were introduced in Solaris 9, so
2066 * testing for HAS UNSETENV is sufficient.
2067 */
2068# if defined(__CYGWIN__)|| defined(__SYMBIAN32__) || defined(__riscos__) || (defined(__sun) && defined(HAS_UNSETENV)) || defined(PERL_DARWIN)
2069# define MY_HAS_SETENV
2070# endif
2071
34716e2a
DM
2072/* small wrapper for use by Perl_my_setenv that mallocs, or reallocs if
2073 * 'current' is non-null, with up to three sizes that are added together.
2074 * It handles integer overflow.
2075 */
3d50648c 2076# ifndef MY_HAS_SETENV
34716e2a
DM
2077static char *
2078S_env_alloc(void *current, Size_t l1, Size_t l2, Size_t l3, Size_t size)
2079{
2080 void *p;
2081 Size_t sl, l = l1 + l2;
2082
2083 if (l < l2)
2084 goto panic;
2085 l += l3;
2086 if (l < l3)
2087 goto panic;
2088 sl = l * size;
2089 if (sl < l)
2090 goto panic;
2091
2092 p = current
2093 ? safesysrealloc(current, sl)
2094 : safesysmalloc(sl);
2095 if (p)
2096 return (char*)p;
2097
2098 panic:
2099 croak_memory_wrap();
2100}
3d50648c 2101# endif
34716e2a
DM
2102
2103
adebb90d 2104# if !defined(WIN32) && !defined(NETWARE)
34716e2a 2105
df641d45
KW
2106/*
2107=for apidoc my_setenv
2108
2109A wrapper for the C library L<setenv(3)>. Don't use the latter, as the perl
2110version has desirable safeguards
2111
2112=cut
2113*/
2114
8d063cd8 2115void
e1ec3a88 2116Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 2117{
27da23d5 2118 dVAR;
adebb90d 2119# ifdef __amigaos4__
6e3136a6 2120 amigaos4_obtain_environ(__FUNCTION__);
adebb90d
DM
2121# endif
2122
2123# ifdef USE_ITHREADS
4efc5df6
GS
2124 /* only parent thread can modify process environment */
2125 if (PL_curinterp == aTHX)
adebb90d 2126# endif
4efc5df6 2127 {
adebb90d
DM
2128
2129# ifndef PERL_USE_SAFE_PUTENV
50acdf95 2130 if (!PL_use_safe_putenv) {
b7d87861 2131 /* most putenv()s leak, so we manipulate environ directly */
34716e2a
DM
2132 UV i;
2133 Size_t vlen, nlen = strlen(nam);
b7d87861
JH
2134
2135 /* where does it go? */
2136 for (i = 0; environ[i]; i++) {
34716e2a 2137 if (strnEQ(environ[i], nam, nlen) && environ[i][nlen] == '=')
b7d87861
JH
2138 break;
2139 }
c5d12488 2140
b7d87861 2141 if (environ == PL_origenviron) { /* need we copy environment? */
34716e2a 2142 UV j, max;
b7d87861
JH
2143 char **tmpenv;
2144
2145 max = i;
2146 while (environ[max])
2147 max++;
adebb90d 2148
34716e2a
DM
2149 /* XXX shouldn't that be max+1 rather than max+2 ??? - DAPM */
2150 tmpenv = (char**)S_env_alloc(NULL, max, 2, 0, sizeof(char*));
adebb90d 2151
b7d87861 2152 for (j=0; j<max; j++) { /* copy environment */
34716e2a
DM
2153 const Size_t len = strlen(environ[j]);
2154 tmpenv[j] = S_env_alloc(NULL, len, 1, 0, 1);
b7d87861
JH
2155 Copy(environ[j], tmpenv[j], len+1, char);
2156 }
adebb90d 2157
b7d87861
JH
2158 tmpenv[max] = NULL;
2159 environ = tmpenv; /* tell exec where it is now */
2160 }
adebb90d 2161
b7d87861
JH
2162 if (!val) {
2163 safesysfree(environ[i]);
2164 while (environ[i]) {
2165 environ[i] = environ[i+1];
2166 i++;
2167 }
adebb90d 2168# ifdef __amigaos4__
6e3136a6 2169 goto my_setenv_out;
adebb90d 2170# else
b7d87861 2171 return;
adebb90d 2172# endif
b7d87861 2173 }
adebb90d 2174
b7d87861 2175 if (!environ[i]) { /* does not exist yet */
34716e2a 2176 environ = (char**)S_env_alloc(environ, i, 2, 0, sizeof(char*));
b7d87861
JH
2177 environ[i+1] = NULL; /* make sure it's null terminated */
2178 }
2179 else
2180 safesysfree(environ[i]);
34716e2a 2181
b7d87861
JH
2182 vlen = strlen(val);
2183
34716e2a 2184 environ[i] = S_env_alloc(NULL, nlen, vlen, 2, 1);
b7d87861
JH
2185 /* all that work just for this */
2186 my_setenv_format(environ[i], nam, nlen, val, vlen);
adebb90d
DM
2187 }
2188 else {
2189
2190# endif /* !PERL_USE_SAFE_PUTENV */
2191
3d50648c 2192# ifdef MY_HAS_SETENV
adebb90d 2193# if defined(HAS_UNSETENV)
88f5bc07
AB
2194 if (val == NULL) {
2195 (void)unsetenv(nam);
2196 } else {
2197 (void)setenv(nam, val, 1);
2198 }
adebb90d 2199# else /* ! HAS_UNSETENV */
88f5bc07 2200 (void)setenv(nam, val, 1);
adebb90d
DM
2201# endif /* HAS_UNSETENV */
2202
2203# elif defined(HAS_UNSETENV)
2204
88f5bc07 2205 if (val == NULL) {
ba88ff58
MJ
2206 if (environ) /* old glibc can crash with null environ */
2207 (void)unsetenv(nam);
88f5bc07 2208 } else {
34716e2a
DM
2209 const Size_t nlen = strlen(nam);
2210 const Size_t vlen = strlen(val);
2211 char * const new_env = S_env_alloc(NULL, nlen, vlen, 2, 1);
88f5bc07
AB
2212 my_setenv_format(new_env, nam, nlen, val, vlen);
2213 (void)putenv(new_env);
2214 }
adebb90d
DM
2215
2216# else /* ! HAS_UNSETENV */
2217
88f5bc07 2218 char *new_env;
34716e2a
DM
2219 const Size_t nlen = strlen(nam);
2220 Size_t vlen;
88f5bc07
AB
2221 if (!val) {
2222 val = "";
2223 }
2224 vlen = strlen(val);
34716e2a 2225 new_env = S_env_alloc(NULL, nlen, vlen, 2, 1);
88f5bc07
AB
2226 /* all that work just for this */
2227 my_setenv_format(new_env, nam, nlen, val, vlen);
2228 (void)putenv(new_env);
adebb90d 2229
3d50648c 2230# endif /* MY_HAS_SETENV */
adebb90d
DM
2231
2232# ifndef PERL_USE_SAFE_PUTENV
50acdf95 2233 }
adebb90d 2234# endif
4efc5df6 2235 }
adebb90d
DM
2236
2237# ifdef __amigaos4__
6e3136a6
AB
2238my_setenv_out:
2239 amigaos4_release_environ(__FUNCTION__);
adebb90d 2240# endif
8d063cd8
LW
2241}
2242
adebb90d 2243# else /* WIN32 || NETWARE */
68dc0745
PP
2244
2245void
72229eff 2246Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 2247{
27da23d5 2248 dVAR;
eb578fdb 2249 char *envstr;
34716e2a
DM
2250 const Size_t nlen = strlen(nam);
2251 Size_t vlen;
e6587932 2252
c5d12488
JH
2253 if (!val) {
2254 val = "";
ac5c734f 2255 }
c5d12488 2256 vlen = strlen(val);
34716e2a 2257 envstr = S_env_alloc(NULL, nlen, vlen, 2, 1);
c5d12488
JH
2258 my_setenv_format(envstr, nam, nlen, val, vlen);
2259 (void)PerlEnv_putenv(envstr);
2260 Safefree(envstr);
3e3baf6d
TB
2261}
2262
adebb90d
DM
2263# endif /* WIN32 || NETWARE */
2264
2265#endif /* USE_ENVIRON_ARRAY */
2266
2267
3e3baf6d 2268
378cc40b 2269
16d20bd9 2270#ifdef UNLINK_ALL_VERSIONS
79072805 2271I32
6e732051 2272Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 2273{
35da51f7 2274 I32 retries = 0;
378cc40b 2275
7918f24d
NC
2276 PERL_ARGS_ASSERT_UNLNK;
2277
35da51f7
AL
2278 while (PerlLIO_unlink(f) >= 0)
2279 retries++;
2280 return retries ? 0 : -1;
378cc40b
LW
2281}
2282#endif
2283
4a7d1889 2284PerlIO *
c9289b7b 2285Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args)
4a7d1889 2286{
f6fb4e44 2287#if (!defined(DOSISH) || defined(HAS_FORK)) && !defined(OS2) && !defined(VMS) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__) && !defined(__amigaos4__)
1f852d0d 2288 int p[2];
eb578fdb
KW
2289 I32 This, that;
2290 Pid_t pid;
1f852d0d
NIS
2291 SV *sv;
2292 I32 did_pipes = 0;
2293 int pp[2];
2294
7918f24d
NC
2295 PERL_ARGS_ASSERT_MY_POPEN_LIST;
2296
1f852d0d
NIS
2297 PERL_FLUSHALL_FOR_CHILD;
2298 This = (*mode == 'w');
2299 that = !This;
284167a5 2300 if (TAINTING_get) {
1f852d0d
NIS
2301 taint_env();
2302 taint_proper("Insecure %s%s", "EXEC");
2303 }
884fc2d3 2304 if (PerlProc_pipe_cloexec(p) < 0)
4608196e 2305 return NULL;
1f852d0d 2306 /* Try for another pipe pair for error return */
74df577f 2307 if (PerlProc_pipe_cloexec(pp) >= 0)
1f852d0d 2308 did_pipes = 1;
52e18b1f 2309 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS
2310 if (errno != EAGAIN) {
2311 PerlLIO_close(p[This]);
4e6dfe71 2312 PerlLIO_close(p[that]);
1f852d0d
NIS
2313 if (did_pipes) {
2314 PerlLIO_close(pp[0]);
2315 PerlLIO_close(pp[1]);
2316 }
4608196e 2317 return NULL;
1f852d0d 2318 }
a2a5de95 2319 Perl_ck_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds");
1f852d0d
NIS
2320 sleep(5);
2321 }
2322 if (pid == 0) {
2323 /* Child */
1f852d0d
NIS
2324#undef THIS
2325#undef THAT
2326#define THIS that
2327#define THAT This
1f852d0d 2328 /* Close parent's end of error status pipe (if any) */
74df577f 2329 if (did_pipes)
1f852d0d 2330 PerlLIO_close(pp[0]);
1f852d0d
NIS
2331 /* Now dup our end of _the_ pipe to right position */
2332 if (p[THIS] != (*mode == 'r')) {
2333 PerlLIO_dup2(p[THIS], *mode == 'r');
2334 PerlLIO_close(p[THIS]);
4e6dfe71
GS
2335 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2336 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2337 }
30c869b8
LT
2338 else {
2339 setfd_cloexec_or_inhexec_by_sysfdness(p[THIS]);
4e6dfe71 2340 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
30c869b8 2341 }
1f852d0d
NIS
2342#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2343 /* No automatic close - do it by hand */
b7953727
JH
2344# ifndef NOFILE
2345# define NOFILE 20
2346# endif
a080fe3d
NIS
2347 {
2348 int fd;
2349
2350 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2351 if (fd != pp[1])
a080fe3d
NIS
2352 PerlLIO_close(fd);
2353 }
1f852d0d
NIS
2354 }
2355#endif
a0714e2c 2356 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
1f852d0d
NIS
2357 PerlProc__exit(1);
2358#undef THIS
2359#undef THAT
2360 }
2361 /* Parent */
1f852d0d
NIS
2362 if (did_pipes)
2363 PerlLIO_close(pp[1]);
2364 /* Keep the lower of the two fd numbers */
2365 if (p[that] < p[This]) {
884fc2d3 2366 PerlLIO_dup2_cloexec(p[This], p[that]);
1f852d0d
NIS
2367 PerlLIO_close(p[This]);
2368 p[This] = p[that];
2369 }
4e6dfe71
GS
2370 else
2371 PerlLIO_close(p[that]); /* close child's end of pipe */
2372
1f852d0d 2373 sv = *av_fetch(PL_fdpid,p[This],TRUE);
862a34c6 2374 SvUPGRADE(sv,SVt_IV);
45977657 2375 SvIV_set(sv, pid);
1f852d0d
NIS
2376 PL_forkprocess = pid;
2377 /* If we managed to get status pipe check for exec fail */
2378 if (did_pipes && pid > 0) {
2379 int errkid;
35bc1e35 2380 unsigned read_total = 0;
1f852d0d 2381
35bc1e35 2382 while (read_total < sizeof(int)) {
19742f39 2383 const SSize_t n1 = PerlLIO_read(pp[0],
35bc1e35
JK
2384 (void*)(((char*)&errkid)+read_total),
2385 (sizeof(int)) - read_total);
1f852d0d
NIS
2386 if (n1 <= 0)
2387 break;
35bc1e35 2388 read_total += n1;
1f852d0d
NIS
2389 }
2390 PerlLIO_close(pp[0]);
2391 did_pipes = 0;
35bc1e35 2392 if (read_total) { /* Error */
1f852d0d 2393 int pid2, status;
8c51524e 2394 PerlLIO_close(p[This]);
35bc1e35
JK
2395 if (read_total != sizeof(int))
2396 Perl_croak(aTHX_ "panic: kid popen errno read, n=%u", read_total);
1f852d0d
NIS
2397 do {
2398 pid2 = wait4pid(pid, &status, 0);
2399 } while (pid2 == -1 && errno == EINTR);
2400 errno = errkid; /* Propagate errno from kid */
4608196e 2401 return NULL;
1f852d0d
NIS
2402 }
2403 }
2404 if (did_pipes)
2405 PerlLIO_close(pp[0]);
2406 return PerlIO_fdopen(p[This], mode);
2407#else
8492b23f 2408# if defined(OS2) /* Same, without fork()ing and all extra overhead... */
4e205ed6 2409 return my_syspopen4(aTHX_ NULL, mode, n, args);
8492b23f
TC
2410# elif defined(WIN32)
2411 return win32_popenlist(mode, n, args);
9d419b5f 2412# else
4a7d1889
NIS
2413 Perl_croak(aTHX_ "List form of piped open not implemented");
2414 return (PerlIO *) NULL;
9d419b5f 2415# endif
1f852d0d 2416#endif
4a7d1889
NIS
2417}
2418
4dd5370d
AB
2419 /* VMS' my_popen() is in VMS.c, same with OS/2 and AmigaOS 4. */
2420#if (!defined(DOSISH) || defined(HAS_FORK)) && !defined(VMS) && !defined(__LIBCATAMOUNT__) && !defined(__amigaos4__)
760ac839 2421PerlIO *
3dd43144 2422Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c
LW
2423{
2424 int p[2];
eb578fdb
KW
2425 I32 This, that;
2426 Pid_t pid;
79072805 2427 SV *sv;
bfce84ec 2428 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ
2429 I32 did_pipes = 0;
2430 int pp[2];
a687059c 2431
7918f24d
NC
2432 PERL_ARGS_ASSERT_MY_POPEN;
2433
45bc9206 2434 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ
2435#ifdef OS2
2436 if (doexec) {
23da6c43 2437 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2438 }
a1d180c4 2439#endif
8ac85365
NIS
2440 This = (*mode == 'w');
2441 that = !This;
284167a5 2442 if (doexec && TAINTING_get) {
bbce6d69
PP
2443 taint_env();
2444 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2445 }
884fc2d3 2446 if (PerlProc_pipe_cloexec(p) < 0)
4608196e 2447 return NULL;
74df577f 2448 if (doexec && PerlProc_pipe_cloexec(pp) >= 0)
e446cec8 2449 did_pipes = 1;
52e18b1f 2450 while ((pid = PerlProc_fork()) < 0) {
a687059c 2451 if (errno != EAGAIN) {
6ad3d225 2452 PerlLIO_close(p[This]);
b5ac89c3 2453 PerlLIO_close(p[that]);
e446cec8
IZ
2454 if (did_pipes) {
2455 PerlLIO_close(pp[0]);
2456 PerlLIO_close(pp[1]);
2457 }
a687059c 2458 if (!doexec)
b3647a36 2459 Perl_croak(aTHX_ "Can't fork: %s", Strerror(errno));
4608196e 2460 return NULL;
a687059c 2461 }
a2a5de95 2462 Perl_ck_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds");
a687059c
LW
2463 sleep(5);
2464 }
2465 if (pid == 0) {
79072805 2466
30ac6d9b
GS
2467#undef THIS
2468#undef THAT
a687059c 2469#define THIS that
8ac85365 2470#define THAT This
74df577f 2471 if (did_pipes)
e446cec8 2472 PerlLIO_close(pp[0]);
a687059c 2473 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS
2474 PerlLIO_dup2(p[THIS], *mode == 'r');
2475 PerlLIO_close(p[THIS]);
b5ac89c3
NIS
2476 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2477 PerlLIO_close(p[THAT]);
a687059c 2478 }
c6fe5b98
LT
2479 else {
2480 setfd_cloexec_or_inhexec_by_sysfdness(p[THIS]);
b5ac89c3 2481 PerlLIO_close(p[THAT]);
c6fe5b98 2482 }
4435c477 2483#ifndef OS2
a687059c 2484 if (doexec) {
a0d0e21e 2485#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW
2486#ifndef NOFILE
2487#define NOFILE 20
2488#endif
a080fe3d 2489 {
3aed30dc 2490 int fd;
a080fe3d
NIS
2491
2492 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2493 if (fd != pp[1])
3aed30dc 2494 PerlLIO_close(fd);
a080fe3d 2495 }
ae986130 2496#endif
a080fe3d
NIS
2497 /* may or may not use the shell */
2498 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2499 PerlProc__exit(1);
a687059c 2500 }
4435c477 2501#endif /* defined OS2 */
713cef20
IZ
2502
2503#ifdef PERLIO_USING_CRLF
2504 /* Since we circumvent IO layers when we manipulate low-level
2505 filedescriptors directly, need to manually switch to the
2506 default, binary, low-level mode; see PerlIOBuf_open(). */
2507 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2508#endif
3280af22 2509 PL_forkprocess = 0;
ca0c25f6 2510#ifdef PERL_USES_PL_PIDSTATUS
3280af22 2511 hv_clear(PL_pidstatus); /* we have no children */
ca0c25f6 2512#endif
4608196e 2513 return NULL;
a687059c
LW
2514#undef THIS
2515#undef THAT
2516 }
e446cec8
IZ
2517 if (did_pipes)
2518 PerlLIO_close(pp[1]);
8ac85365 2519 if (p[that] < p[This]) {
884fc2d3 2520 PerlLIO_dup2_cloexec(p[This], p[that]);
6ad3d225 2521 PerlLIO_close(p[This]);
8ac85365 2522 p[This] = p[that];
62b28dd9 2523 }
b5ac89c3
NIS
2524 else
2525 PerlLIO_close(p[that]);
2526
3280af22 2527 sv = *av_fetch(PL_fdpid,p[This],TRUE);
862a34c6 2528 SvUPGRADE(sv,SVt_IV);
45977657 2529 SvIV_set(sv, pid);
3280af22 2530 PL_forkprocess = pid;
e446cec8
IZ
2531 if (did_pipes && pid > 0) {
2532 int errkid;
bb7a0f54 2533 unsigned n = 0;
e446cec8
IZ
2534
2535 while (n < sizeof(int)) {
19742f39 2536 const SSize_t n1 = PerlLIO_read(pp[0],
e446cec8
IZ
2537 (void*)(((char*)&errkid)+n),
2538 (sizeof(int)) - n);
2539 if (n1 <= 0)
2540 break;
2541 n += n1;
2542 }
2f96c702
IZ
2543 PerlLIO_close(pp[0]);
2544 did_pipes = 0;
e446cec8 2545 if (n) { /* Error */
faa466a7 2546 int pid2, status;
8c51524e 2547 PerlLIO_close(p[This]);
e446cec8 2548 if (n != sizeof(int))
5637ef5b 2549 Perl_croak(aTHX_ "panic: kid popen errno read, n=%u", n);
faa466a7
RG
2550 do {
2551 pid2 = wait4pid(pid, &status, 0);
2552 } while (pid2 == -1 && errno == EINTR);
e446cec8 2553 errno = errkid; /* Propagate errno from kid */
4608196e 2554 return NULL;
e446cec8
IZ
2555 }
2556 }
2557 if (did_pipes)
2558 PerlLIO_close(pp[0]);
8ac85365 2559 return PerlIO_fdopen(p[This], mode);
a687059c 2560}
8ad758c7 2561#elif defined(DJGPP)
2b96b0a5
JH
2562FILE *djgpp_popen();
2563PerlIO *
cef6ea9d 2564Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2b96b0a5
JH
2565{
2566 PERL_FLUSHALL_FOR_CHILD;
2567 /* Call system's popen() to get a FILE *, then import it.
2568 used 0 for 2nd parameter to PerlIO_importFILE;
2569 apparently not used
2570 */
2571 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2572}
8ad758c7 2573#elif defined(__LIBCATAMOUNT__)
9c12f1e5
RGS
2574PerlIO *
2575Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2576{
2577 return NULL;
2578}
7c0587c8
LW
2579
2580#endif /* !DOSISH */
a687059c 2581
52e18b1f
GS
2582/* this is called in parent before the fork() */
2583void
2584Perl_atfork_lock(void)
80b94025
JH
2585#if defined(USE_ITHREADS)
2586# ifdef USE_PERLIO
2587 PERL_TSA_ACQUIRE(PL_perlio_mutex)
2588# endif
2589# ifdef MYMALLOC
2590 PERL_TSA_ACQUIRE(PL_malloc_mutex)
2591# endif
2592 PERL_TSA_ACQUIRE(PL_op_mutex)
2593#endif
52e18b1f 2594{
3db8f154 2595#if defined(USE_ITHREADS)
20b7effb 2596 dVAR;
52e18b1f 2597 /* locks must be held in locking order (if any) */
4da80956
P
2598# ifdef USE_PERLIO
2599 MUTEX_LOCK(&PL_perlio_mutex);
2600# endif
52e18b1f
GS
2601# ifdef MYMALLOC
2602 MUTEX_LOCK(&PL_malloc_mutex);
2603# endif
2604 OP_REFCNT_LOCK;
2605#endif
2606}
2607
2608/* this is called in both parent and child after the fork() */
2609void
2610Perl_atfork_unlock(void)
80b94025
JH
2611#if defined(USE_ITHREADS)
2612# ifdef USE_PERLIO
2613 PERL_TSA_RELEASE(PL_perlio_mutex)
2614# endif
2615# ifdef MYMALLOC
2616 PERL_TSA_RELEASE(PL_malloc_mutex)
2617# endif
2618 PERL_TSA_RELEASE(PL_op_mutex)
2619#endif
52e18b1f 2620{
3db8f154 2621#if defined(USE_ITHREADS)
20b7effb 2622 dVAR;
52e18b1f 2623 /* locks must be released in same order as in atfork_lock() */
4da80956
P
2624# ifdef USE_PERLIO
2625 MUTEX_UNLOCK(&PL_perlio_mutex);
2626# endif
52e18b1f
GS
2627# ifdef MYMALLOC
2628 MUTEX_UNLOCK(&PL_malloc_mutex);
2629# endif
2630 OP_REFCNT_UNLOCK;
2631#endif
2632}
2633
2634Pid_t
2635Perl_my_fork(void)
2636{
2637#if defined(HAS_FORK)
2638 Pid_t pid;
3db8f154 2639#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS
2640 atfork_lock();
2641 pid = fork();
2642 atfork_unlock();
2643#else
2644 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2645 * handlers elsewhere in the code */
2646 pid = fork();
2647#endif
2648 return pid;
40262ff4
AB
2649#elif defined(__amigaos4__)
2650 return amigaos_fork();
52e18b1f
GS
2651#else
2652 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2653 Perl_croak_nocontext("fork() not available");
b961a566 2654 return 0;
52e18b1f
GS
2655#endif /* HAS_FORK */
2656}
2657
fe14fcc3 2658#ifndef HAS_DUP2
fec02dd3 2659int
ba106d47 2660dup2(int oldfd, int newfd)
a687059c 2661{
a0d0e21e 2662#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD
2663 if (oldfd == newfd)
2664 return oldfd;
6ad3d225 2665 PerlLIO_close(newfd);
fec02dd3 2666 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2667#else
fc36a67e
PP
2668#define DUP2_MAX_FDS 256
2669 int fdtmp[DUP2_MAX_FDS];
79072805 2670 I32 fdx = 0;
ae986130
LW
2671 int fd;
2672
fe14fcc3 2673 if (oldfd == newfd)
fec02dd3 2674 return oldfd;
6ad3d225 2675 PerlLIO_close(newfd);
fc36a67e 2676 /* good enough for low fd's... */
6ad3d225 2677 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2678 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2679 PerlLIO_close(fd);
fc36a67e
PP
2680 fd = -1;
2681 break;
2682 }
ae986130 2683 fdtmp[fdx++] = fd;
fc36a67e 2684 }
ae986130 2685 while (fdx > 0)
6ad3d225 2686 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2687 return fd;
62b28dd9 2688#endif
a687059c
LW
2689}
2690#endif
2691
64ca3a65 2692#ifndef PERL_MICRO
ff68c719
PP
2693#ifdef HAS_SIGACTION
2694
962fce0f
KW
2695/*
2696=for apidoc rsignal
2697
2698A wrapper for the C library L<signal(2)>. Don't use the latter, as the Perl
2699version knows things that interact with the rest of the perl interpreter.
2700
2701=cut
2702*/
2703
ff68c719 2704Sighandler_t
864dbfa3 2705Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719
PP
2706{
2707 struct sigaction act, oact;
2708
a10b1e10 2709#ifdef USE_ITHREADS
20b7effb 2710 dVAR;
a10b1e10
JH
2711 /* only "parent" interpreter can diddle signals */
2712 if (PL_curinterp != aTHX)
8aad04aa 2713 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2714#endif
2715
8aad04aa 2716 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2717 sigemptyset(&act.sa_mask);
2718 act.sa_flags = 0;
2719#ifdef SA_RESTART
4ffa73a3
JH
2720 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2721 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2722#endif
358837b8 2723#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2724 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2725 act.sa_flags |= SA_NOCLDWAIT;
2726#endif
ff68c719 2727 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2728 return (Sighandler_t) SIG_ERR;
ff68c719 2729 else
8aad04aa 2730 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2731}
2732
2733Sighandler_t
864dbfa3 2734Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP
2735{
2736 struct sigaction oact;
96a5add6 2737 PERL_UNUSED_CONTEXT;
ff68c719
PP
2738
2739 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2740 return (Sighandler_t) SIG_ERR;
ff68c719 2741 else
8aad04aa 2742 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2743}
2744
2745int
864dbfa3 2746Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2747{
20b7effb 2748#ifdef USE_ITHREADS
27da23d5 2749 dVAR;
20b7effb 2750#endif
ff68c719
PP
2751 struct sigaction act;
2752
7918f24d
NC
2753 PERL_ARGS_ASSERT_RSIGNAL_SAVE;
2754
a10b1e10
JH
2755#ifdef USE_ITHREADS
2756 /* only "parent" interpreter can diddle signals */
2757 if (PL_curinterp != aTHX)
2758 return -1;
2759#endif
2760
8aad04aa 2761 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2762 sigemptyset(&act.sa_mask);
2763 act.sa_flags = 0;
2764#ifdef SA_RESTART
4ffa73a3
JH
2765 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2766 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2767#endif
36b5d377 2768#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2769 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2770 act.sa_flags |= SA_NOCLDWAIT;
2771#endif
ff68c719
PP
2772 return sigaction(signo, &act, save);
2773}
2774
2775int
864dbfa3 2776Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2777{
20b7effb 2778#ifdef USE_ITHREADS
27da23d5 2779 dVAR;
20b7effb
JH
2780#endif
2781 PERL_UNUSED_CONTEXT;
a10b1e10
JH
2782#ifdef USE_ITHREADS
2783 /* only "parent" interpreter can diddle signals */
2784 if (PL_curinterp != aTHX)
2785 return -1;
2786#endif
2787
ff68c719
PP
2788 return sigaction(signo, save, (struct sigaction *)NULL);
2789}
2790
2791#else /* !HAS_SIGACTION */
2792
2793Sighandler_t
864dbfa3 2794Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2795{
39f1703b 2796#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2797 /* only "parent" interpreter can diddle signals */
2798 if (PL_curinterp != aTHX)
8aad04aa 2799 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2800#endif
2801
6ad3d225 2802 return PerlProc_signal(signo, handler);
ff68c719
PP
2803}
2804
fabdb6c0 2805static Signal_t
4e35701f 2806sig_trap(int signo)
ff68c719 2807{
27da23d5
JH
2808 dVAR;
2809 PL_sig_trapped++;
ff68c719
PP
2810}
2811
2812Sighandler_t
864dbfa3 2813Perl_rsignal_state(pTHX_ int signo)
ff68c719 2814{
27da23d5 2815 dVAR;
ff68c719
PP
2816 Sighandler_t oldsig;
2817
39f1703b 2818#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2819 /* only "parent" interpreter can diddle signals */
2820 if (PL_curinterp != aTHX)
8aad04aa 2821 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2822#endif
2823
27da23d5 2824 PL_sig_trapped = 0;
6ad3d225
GS
2825 oldsig = PerlProc_signal(signo, sig_trap);
2826 PerlProc_signal(signo, oldsig);
27da23d5 2827 if (PL_sig_trapped)
3aed30dc 2828 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719
PP
2829 return oldsig;
2830}
2831
2832int
864dbfa3 2833Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2834{
39f1703b 2835#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2836 /* only "parent" interpreter can diddle signals */
2837 if (PL_curinterp != aTHX)
2838 return -1;
2839#endif
6ad3d225 2840 *save = PerlProc_signal(signo, handler);
8aad04aa 2841 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2842}
2843
2844int
864dbfa3 2845Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2846{
39f1703b 2847#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2848 /* only "parent" interpreter can diddle signals */
2849 if (PL_curinterp != aTHX)
2850 return -1;
2851#endif
8aad04aa 2852 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2853}
2854
2855#endif /* !HAS_SIGACTION */
64ca3a65 2856#endif /* !PERL_MICRO */
ff68c719 2857
5f05dabc 2858 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
53f73940 2859#if (!defined(DOSISH) || defined(HAS_FORK)) && !defined(VMS) && !defined(__LIBCATAMOUNT__) && !defined(__amigaos4__)
79072805 2860I32
864dbfa3 2861Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2862{
a687059c 2863 int status;
a0d0e21e 2864 SV **svp;
d8a83dd3 2865 Pid_t pid;
2e0cfa16 2866 Pid_t pid2 = 0;
03136e13 2867 bool close_failed;
4ee39169 2868 dSAVEDERRNO;
2e0cfa16 2869 const int fd = PerlIO_fileno(ptr);
e9d373c4
TC
2870 bool should_wait;
2871
2872 svp = av_fetch(PL_fdpid,fd,TRUE);
2873 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
2874 SvREFCNT_dec(*svp);
2875 *svp = NULL;
2e0cfa16 2876
97cb92d6 2877#if defined(USE_PERLIO)
2e0cfa16
FC
2878 /* Find out whether the refcount is low enough for us to wait for the
2879 child proc without blocking. */
e9d373c4 2880 should_wait = PerlIOUnix_refcnt(fd) == 1 && pid > 0;
b6ae43b7 2881#else
e9d373c4 2882 should_wait = pid > 0;
b6ae43b7 2883#endif
a687059c 2884
ddcf38b7
IZ
2885#ifdef OS2
2886 if (pid == -1) { /* Opened by popen. */
2887 return my_syspclose(ptr);
2888 }
a1d180c4 2889#endif
f1618b10
CS
2890 close_failed = (PerlIO_close(ptr) == EOF);
2891 SAVE_ERRNO;
2e0cfa16 2892 if (should_wait) do {
1d3434b8
GS
2893 pid2 = wait4pid(pid, &status, 0);
2894 } while (pid2 == -1 && errno == EINTR);
03136e13 2895 if (close_failed) {
4ee39169 2896 RESTORE_ERRNO;
03136e13
CS
2897 return -1;
2898 }
2e0cfa16
FC
2899 return(
2900 should_wait
2901 ? pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status)
2902 : 0
2903 );
20188a90 2904}
8ad758c7 2905#elif defined(__LIBCATAMOUNT__)
9c12f1e5
RGS
2906I32
2907Perl_my_pclose(pTHX_ PerlIO *ptr)
2908{
2909 return -1;
2910}
4633a7c4
LW
2911#endif /* !DOSISH */
2912
e37778c2 2913#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(__LIBCATAMOUNT__)
79072805 2914I32
d8a83dd3 2915Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2916{
27da23d5 2917 I32 result = 0;
7918f24d 2918 PERL_ARGS_ASSERT_WAIT4PID;
ca0c25f6 2919#ifdef PERL_USES_PL_PIDSTATUS
d4c02743
TC
2920 if (!pid) {
2921 /* PERL_USES_PL_PIDSTATUS is only defined when neither
2922 waitpid() nor wait4() is available, or on OS/2, which
2923 doesn't appear to support waiting for a progress group
2924 member, so we can only treat a 0 pid as an unknown child.
2925 */
2926 errno = ECHILD;
2927 return -1;
2928 }
b7953727 2929 {
3aed30dc 2930 if (pid > 0) {
12072db5
NC
2931 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2932 pid, rather than a string form. */
c4420975 2933 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
3aed30dc
HS
2934 if (svp && *svp != &PL_sv_undef) {
2935 *statusp = SvIVX(*svp);
12072db5
NC
2936 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2937 G_DISCARD);
3aed30dc
HS
2938 return pid;
2939 }
2940 }
2941 else {
2942 HE *entry;
2943
2944 hv_iterinit(PL_pidstatus);
2945 if ((entry = hv_iternext(PL_pidstatus))) {
c4420975 2946 SV * const sv = hv_iterval(PL_pidstatus,entry);
7ea75b61 2947 I32 len;
0bcc34c2 2948 const char * const spid = hv_iterkey(entry,&len);
27da23d5 2949
12072db5
NC
2950 assert (len == sizeof(Pid_t));
2951 memcpy((char *)&pid, spid, len);
3aed30dc 2952 *statusp = SvIVX(sv);
7b9a3241
NC
2953 /* The hash iterator is currently on this entry, so simply
2954 calling hv_delete would trigger the lazy delete, which on
f6bab5f6 2955 aggregate does more work, because next call to hv_iterinit()
7b9a3241
NC
2956 would spot the flag, and have to call the delete routine,
2957 while in the meantime any new entries can't re-use that
2958 memory. */
2959 hv_iterinit(PL_pidstatus);
7ea75b61 2960 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
3aed30dc
HS
2961 return pid;
2962 }
20188a90
LW
2963 }
2964 }
68a29c53 2965#endif
79072805 2966#ifdef HAS_WAITPID
367f3c24
IZ
2967# ifdef HAS_WAITPID_RUNTIME
2968 if (!HAS_WAITPID_RUNTIME)
2969 goto hard_way;
2970# endif
cddd4526 2971 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2972 goto finish;
367f3c24
IZ
2973#endif
2974#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
d4c02743 2975 result = wait4(pid,statusp,flags,NULL);
dfcfdb64 2976 goto finish;
367f3c24 2977#endif
ca0c25f6 2978#ifdef PERL_USES_PL_PIDSTATUS
27da23d5 2979#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2980 hard_way:
27da23d5 2981#endif
a0d0e21e 2982 {
a0d0e21e 2983 if (flags)
cea2e8a9 2984 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2985 else {
76e3520e 2986 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW
2987 pidgone(result,*statusp);
2988 if (result < 0)
2989 *statusp = -1;
2990 }
a687059c
LW
2991 }
2992#endif
27da23d5 2993#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 2994 finish:
27da23d5 2995#endif
cddd4526
NIS
2996 if (result < 0 && errno == EINTR) {
2997 PERL_ASYNC_CHECK();
48dbb59e 2998 errno = EINTR; /* reset in case a signal handler changed $! */
cddd4526
NIS
2999 }
3000 return result;
a687059c 3001}
2986a63f 3002#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 3003
ca0c25f6 3004#ifdef PERL_USES_PL_PIDSTATUS
7c0587c8 3005void
ed4173ef 3006S_pidgone(pTHX_ Pid_t pid, int status)
a687059c 3007{
eb578fdb 3008 SV *sv;
a687059c 3009
12072db5 3010 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
862a34c6 3011 SvUPGRADE(sv,SVt_IV);
45977657 3012 SvIV_set(sv, status);
20188a90 3013 return;
a687059c 3014}
ca0c25f6 3015#endif
a687059c 3016
6de23f80 3017#if defined(OS2)
7c0587c8 3018int pclose();
ddcf38b7
IZ
3019#ifdef HAS_FORK
3020int /* Cannot prototype with I32
3021 in os2ish.h. */
ba106d47 3022my_syspclose(PerlIO *ptr)
ddcf38b7 3023#else
79072805 3024I32
864dbfa3 3025Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 3026#endif
a687059c 3027{
760ac839 3028 /* Needs work for PerlIO ! */
c4420975 3029 FILE * const f = PerlIO_findFILE(ptr);
7452cf6a 3030 const I32 result = pclose(f);
2b96b0a5
JH
3031 PerlIO_releaseFILE(ptr,f);
3032 return result;
3033}
3034#endif
3035
933fea7f 3036#if defined(DJGPP)
2b96b0a5
JH
3037int djgpp_pclose();
3038I32
3039Perl_my_pclose(pTHX_ PerlIO *ptr)
3040{
3041 /* Needs work for PerlIO ! */
c4420975 3042 FILE * const f = PerlIO_findFILE(ptr);
2b96b0a5 3043 I32 result = djgpp_pclose(f);
933fea7f 3044 result = (result << 8) & 0xff00;
760ac839
LW
3045 PerlIO_releaseFILE(ptr,f);
3046 return result;
a687059c 3047}
7c0587c8 3048#endif
9f68db38 3049
16fa5c11 3050#define PERL_REPEATCPY_LINEAR 4
9f68db38 3051void
5aaab254 3052Perl_repeatcpy(char *to, const char *from, I32 len, IV count)
9f68db38 3053{
7918f24d
NC
3054 PERL_ARGS_ASSERT_REPEATCPY;
3055
223f01db
KW
3056 assert(len >= 0);
3057
2709980d 3058 if (count < 0)
d1decf2b 3059 croak_memory_wrap();
2709980d 3060
16fa5c11
VP
3061 if (len == 1)
3062 memset(to, *from, count);
3063 else if (count) {
eb578fdb 3064 char *p = to;
26e1303d 3065 IV items, linear, half;
16fa5c11
VP
3066
3067 linear = count < PERL_REPEATCPY_LINEAR ? count : PERL_REPEATCPY_LINEAR;
3068 for (items = 0; items < linear; ++items) {
eb578fdb 3069 const char *q = from;
26e1303d 3070 IV todo;
16fa5c11
VP
3071 for (todo = len; todo > 0; todo--)
3072 *p++ = *q++;
3073 }
3074
3075 half = count / 2;
3076 while (items <= half) {
26e1303d 3077 IV size = items * len;
16fa5c11
VP
3078 memcpy(p, to, size);
3079 p += size;
3080 items *= 2;
9f68db38 3081 }
16fa5c11
VP
3082
3083 if (count > items)
3084 memcpy(p, to, (count - items) * len);
9f68db38
LW
3085 }
3086}
0f85fab0 3087
fe14fcc3 3088#ifndef HAS_RENAME
79072805 3089I32
4373e329 3090Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 3091{
93a17b20
LW
3092 char *fa = strrchr(a,'/');
3093 char *fb = strrchr(b,'/');
c623ac67
GS
3094 Stat_t tmpstatbuf1;
3095 Stat_t tmpstatbuf2;
c4420975 3096 SV * const tmpsv = sv_newmortal();
62b28dd9 3097
7918f24d
NC
3098 PERL_ARGS_ASSERT_SAME_DIRENT;
3099
62b28dd9
LW
3100 if (fa)
3101 fa++;
3102 else
3103 fa = a;
3104 if (fb)
3105 fb++;
3106 else
3107 fb = b;
3108 if (strNE(a,b))
3109 return FALSE;
3110 if (fa == a)
76f68e9b 3111 sv_setpvs(tmpsv, ".");
62b28dd9 3112 else
46fc3d4c 3113 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 3114 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW
3115 return FALSE;
3116 if (fb == b)
76f68e9b 3117 sv_setpvs(tmpsv, ".");
62b28dd9 3118 else
46fc3d4c 3119 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 3120 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW
3121 return FALSE;
3122 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3123 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3124}
fe14fcc3
LW
3125#endif /* !HAS_RENAME */
3126
491527d0 3127char*
7f315aed
NC
3128Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3129 const char *const *const search_ext, I32 flags)
491527d0 3130{
bd61b366
SS
3131 const char *xfound = NULL;
3132 char *xfailed = NULL;
0f31cffe 3133 char tmpbuf[MAXPATHLEN];
eb578fdb 3134 char *s;
5f74f29c 3135 I32 len = 0;
491527d0 3136 int retval;
39a02377 3137 char *bufend;
7c458fae 3138#if defined(DOSISH) && !defined(OS2)
491527d0
GS
3139# define SEARCH_EXTS ".bat", ".cmd", NULL
3140# define MAX_EXT_LEN 4
3141#endif
3142#ifdef OS2
3143# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3144# define MAX_EXT_LEN 4
3145#endif
3146#ifdef VMS
3147# define SEARCH_EXTS ".pl", ".com", NULL
3148# define MAX_EXT_LEN 4
3149#endif
3150 /* additional extensions to try in each dir if scriptname not found */
3151#ifdef SEARCH_EXTS
0bcc34c2 3152 static const char *const exts[] = { SEARCH_EXTS };
7f315aed 3153 const char *const *const ext = search_ext ? search_ext : exts;
491527d0 3154 int extidx = 0, i = 0;
bd61b366 3155 const char *curext = NULL;
491527d0 3156#else
53c1dcc0 3157 PERL_UNUSED_ARG(search_ext);
491527d0
GS
3158# define MAX_EXT_LEN 0
3159#endif
3160
7918f24d
NC
3161 PERL_ARGS_ASSERT_FIND_SCRIPT;
3162
491527d0
GS
3163 /*
3164 * If dosearch is true and if scriptname does not contain path
3165 * delimiters, search the PATH for scriptname.
3166 *
3167 * If SEARCH_EXTS is also defined, will look for each
3168 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3169 * while searching the PATH.
3170 *
3171 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3172 * proceeds as follows:
3173 * If DOSISH or VMSISH:
3174 * + look for ./scriptname{,.foo,.bar}
3175 * + search the PATH for scriptname{,.foo,.bar}
3176 *
3177 * If !DOSISH:
3178 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3179 * this will not look in '.' if it's not in the PATH)
3180 */
84486fc6 3181 tmpbuf[0] = '\0';
491527d0
GS
3182
3183#ifdef VMS
3184# ifdef ALWAYS_DEFTYPES
3185 len = strlen(scriptname);
3186 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
c4420975 3187 int idx = 0, deftypes = 1;
491527d0
GS
3188 bool seen_dot = 1;
3189
bd61b366 3190 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
491527d0
GS
3191# else
3192 if (dosearch) {
c4420975 3193 int idx = 0, deftypes = 1;
491527d0
GS
3194 bool seen_dot = 1;
3195
bd61b366 3196 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
491527d0
GS
3197# endif
3198 /* The first time through, just add SEARCH_EXTS to whatever we
3199 * already have, so we can check for default file types. */
3200 while (deftypes ||
84486fc6 3201 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0 3202 {
2aa28b86 3203 Stat_t statbuf;
491527d0
GS
3204 if (deftypes) {
3205 deftypes = 0;
84486fc6 3206 *tmpbuf = '\0';
491527d0 3207 }
84486fc6
GS
3208 if ((strlen(tmpbuf) + strlen(scriptname)
3209 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 3210 continue; /* don't search dir with too-long name */
6fca0082 3211 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
491527d0
GS
3212#else /* !VMS */
3213
3214#ifdef DOSISH
3215 if (strEQ(scriptname, "-"))
3216 dosearch = 0;
3217 if (dosearch) { /* Look in '.' first. */
fe2774ed 3218 const char *cur = scriptname;
491527d0
GS
3219#ifdef SEARCH_EXTS
3220 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3221 while (ext[i])
3222 if (strEQ(ext[i++],curext)) {
3223 extidx = -1; /* already has an ext */
3224 break;
3225 }
3226 do {
3227#endif
3228 DEBUG_p(PerlIO_printf(Perl_debug_log,
3229 "Looking for %s\n",cur));
45a23732 3230 {
0cc19a43 3231 Stat_t statbuf;
45a23732
DD
3232 if (PerlLIO_stat(cur,&statbuf) >= 0
3233 && !S_ISDIR(statbuf.st_mode)) {
3234 dosearch = 0;
3235 scriptname = cur;
491527d0 3236#ifdef SEARCH_EXTS
45a23732 3237 break;
491527d0 3238#endif
45a23732 3239 }
491527d0
GS
3240 }
3241#ifdef SEARCH_EXTS
3242 if (cur == scriptname) {
3243 len = strlen(scriptname);
84486fc6 3244 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 3245 break;
9e4425f7
SH
3246 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3247 cur = tmpbuf;
491527d0
GS
3248 }
3249 } while (extidx >= 0 && ext[extidx] /* try an extension? */
6fca0082 3250 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
491527d0
GS
3251#endif
3252 }
3253#endif
3254
3255 if (dosearch && !strchr(scriptname, '/')
3256#ifdef DOSISH
3257 && !strchr(scriptname, '\\')
3258#endif
cd39f2b6 3259 && (s = PerlEnv_getenv("PATH")))
cd39f2b6 3260 {
491527d0 3261 bool seen_dot = 0;
92f0c265 3262
39a02377
DM
3263 bufend = s + strlen(s);
3264 while (s < bufend) {
45a23732 3265 Stat_t statbuf;
7c458fae 3266# ifdef DOSISH
491527d0 3267 for (len = 0; *s
491527d0 3268 && *s != ';'; len++, s++) {
84486fc6
GS
3269 if (len < sizeof tmpbuf)
3270 tmpbuf[len] = *s;
491527d0 3271 }
84486fc6
GS
3272 if (len < sizeof tmpbuf)
3273 tmpbuf[len] = '\0';
7c458fae 3274# else
e80af1fd
TC
3275 s = delimcpy_no_escape(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
3276 ':', &len);
7c458fae 3277# endif
39a02377 3278 if (s < bufend)
491527d0 3279 s++;
84486fc6 3280 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0
GS
3281 continue; /* don't search dir with too-long name */
3282 if (len
7c458fae 3283# ifdef DOSISH
84486fc6
GS
3284 && tmpbuf[len - 1] != '/'
3285 && tmpbuf[len - 1] != '\\'
490a0e98 3286# endif
491527d0 3287 )
84486fc6
GS
3288 tmpbuf[len++] = '/';
3289 if (len == 2 && tmpbuf[0] == '.')
491527d0 3290 seen_dot = 1;
28f0d0ec 3291 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
491527d0
GS
3292#endif /* !VMS */
3293
3294#ifdef SEARCH_EXTS
84486fc6 3295 len = strlen(tmpbuf);
491527d0
GS
3296 if (extidx > 0) /* reset after previous loop */
3297 extidx = 0;
3298 do {
3299#endif
84486fc6 3300 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
45a23732
DD
3301 retval = PerlLIO_stat(tmpbuf,&statbuf);
3302 if (S_ISDIR(statbuf.st_mode)) {
017f25f1
IZ
3303 retval = -1;
3304 }
491527d0
GS
3305#ifdef SEARCH_EXTS
3306 } while ( retval < 0 /* not there */
3307 && extidx>=0 && ext[extidx] /* try an extension? */
6fca0082 3308 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
491527d0
GS
3309 );
3310#endif
3311 if (retval < 0)
3312 continue;
45a23732
DD
3313 if (S_ISREG(statbuf.st_mode)
3314 && cando(S_IRUSR,TRUE,&statbuf)
e37778c2 3315#if !defined(DOSISH)
45a23732 3316 && cando(S_IXUSR,TRUE,&statbuf)
491527d0
GS
3317#endif
3318 )
3319 {
3aed30dc 3320 xfound = tmpbuf; /* bingo! */
491527d0
GS
3321 break;
3322 }
3323 if (!xfailed)
84486fc6 3324 xfailed = savepv(tmpbuf);
491527d0
GS
3325 }
3326#ifndef DOSISH
45a23732
DD
3327 {
3328 Stat_t statbuf;
3329 if (!xfound && !seen_dot && !xfailed &&
3330 (PerlLIO_stat(scriptname,&statbuf) < 0
3331 || S_ISDIR(statbuf.st_mode)))
3332#endif
3333 seen_dot = 1; /* Disable message. */
3334#ifndef DOSISH
3335 }
491527d0 3336#endif
9ccb31f9
GS
3337 if (!xfound) {
3338 if (flags & 1) { /* do or die? */
6ad282c7 3339 /* diag_listed_as: Can't execute %s */
3aed30dc 3340 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS
3341 (xfailed ? "execute" : "find"),
3342 (xfailed ? xfailed : scriptname),
3343 (xfailed ? "" : " on PATH"),
3344 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3345 }
bd61b366 3346 scriptname = NULL;
9ccb31f9 3347 }
43c5f42d 3348 Safefree(xfailed);
491527d0
GS
3349 scriptname = xfound;
3350 }
bd61b366 3351 return (scriptname ? savepv(scriptname) : NULL);
491527d0
GS
3352}
3353
ba869deb
GS
3354#ifndef PERL_GET_CONTEXT_DEFINED
3355
3356void *
3357Perl_get_context(void)
3358{
3db8f154 3359#if defined(USE_ITHREADS)
20b7effb 3360 dVAR;
ba869deb
GS
3361# ifdef OLD_PTHREADS_API
3362 pthread_addr_t t;
6535c371 3363 int error = pthread_getspecific(PL_thr_key, &t);
5637ef5b
NC
3364 if (error)
3365 Perl_croak_nocontext("panic: pthread_getspecific, error=%d", error);
ba869deb 3366 return (void*)t;
8ad758c7 3367# elif defined(I_MACH_CTHREADS)
8b8b35ab 3368 return (void*)cthread_data(cthread_self());
8ad758c7 3369# else
8b8b35ab 3370 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
c44d3fdb 3371# endif
ba869deb
GS
3372#else
3373 return (void*)NULL;
3374#endif
3375}
3376
3377void
3378Perl_set_context(void *t)
3379{
20b7effb 3380#if defined(USE_ITHREADS)
8772537c 3381 dVAR;
20b7effb 3382#endif
7918f24d 3383 PERL_ARGS_ASSERT_SET_CONTEXT;
3db8f154 3384#if defined(USE_ITHREADS)
c44d3fdb
GS
3385# ifdef I_MACH_CTHREADS
3386 cthread_set_data(cthread_self(), t);
3387# else
5637ef5b
NC
3388 {
3389 const int error = pthread_setspecific(PL_thr_key, t);
3390 if (error)
3391 Perl_croak_nocontext("panic: pthread_setspecific, error=%d", error);
3392 }
c44d3fdb 3393# endif
b464bac0 3394#else
8772537c 3395 PERL_UNUSED_ARG(t);
ba869deb
GS
3396#endif
3397}
3398
3399#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3400
27da23d5 3401#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3402struct perl_vars *
864dbfa3 3403Perl_GetVars(pTHX)
22239a37 3404{
23491f1d
JH
3405 PERL_UNUSED_CONTEXT;
3406 return &PL_Vars;
22239a37 3407}
31fb1209
NIS
3408#endif
3409
1cb0ed9b 3410char **
864dbfa3 3411Perl_get_op_names(pTHX)
31fb1209 3412{
96a5add6
AL
3413 PERL_UNUSED_CONTEXT;
3414 return (char **)PL_op_name;
31fb1209
NIS
3415}
3416
1cb0ed9b 3417char **
864dbfa3 3418Perl_get_op_descs(pTHX)
31fb1209 3419{
96a5add6
AL
3420 PERL_UNUSED_CONTEXT;
3421 return (char **)PL_op_desc;
31fb1209 3422}
9e6b2b00 3423
e1ec3a88 3424const char *
864dbfa3 3425Perl_get_no_modify(pTHX)
9e6b2b00 3426{
96a5add6
AL
3427 PERL_UNUSED_CONTEXT;
3428 return PL_no_modify;
9e6b2b00
GS
3429}
3430
3431U32 *
864dbfa3 3432Perl_get_opargs(pTHX)
9e6b2b00 3433{
96a5add6
AL
3434 PERL_UNUSED_CONTEXT;
3435 return (U32 *)PL_opargs;
9e6b2b00 3436}
51aa15f3 3437
0cb96387
GS
3438PPADDR_t*
3439Perl_get_ppaddr(pTHX)
3440{
96a5add6
AL
3441 dVAR;
3442 PERL_UNUSED_CONTEXT;
3443 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS
3444}
3445
a6c40364
GS
3446#ifndef HAS_GETENV_LEN
3447char *
bf4acbe4 3448Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3449{
8772537c 3450 char * const env_trans = PerlEnv_getenv(env_elem);
96a5add6 3451 PERL_UNUSED_CONTEXT;
7918f24d 3452 PERL_ARGS_ASSERT_GETENV_LEN;
a6c40364
GS
3453 if (env_trans)
3454 *len = strlen(env_trans);
3455 return env_trans;
f675dbe5
CB
3456}
3457#endif
3458
dc9e4912
GS
3459
3460MGVTBL*
864dbfa3 3461Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3462{
96a5add6 3463 PERL_UNUSED_CONTEXT;
dc9e4912 3464
c7fdacb9 3465 return (vtbl_id < 0 || vtbl_id >= magic_vtable_max)
31114fe9 3466 ? NULL : (MGVTBL*)PL_magic_vtables + vtbl_id;
dc9e4912
GS
3467}
3468
767df6a1 3469I32
864dbfa3 3470Perl_my_fflush_all(pTHX)
767df6a1 3471{
97cb92d6 3472#if defined(USE_PERLIO) || defined(FFLUSH_NULL)
ce720889 3473 return PerlIO_flush(NULL);
767df6a1 3474#else
8fbdfb7c 3475# if defined(HAS__FWALK)
f13a2bc0 3476 extern int fflush(FILE *);
74cac757
JH
3477 /* undocumented, unprototyped, but very useful BSDism */
3478 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3479 _fwalk(&fflush);
74cac757 3480 return 0;
8fa7f367 3481# else
8fbdfb7c 3482# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3483 long open_max = -1;
8fbdfb7c 3484# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3485 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8ad758c7 3486# elif defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3487 open_max = sysconf(_SC_OPEN_MAX);
8ad758c7 3488# elif defined(FOPEN_MAX)
74cac757 3489 open_max = FOPEN_MAX;
8ad758c7 3490# elif defined(OPEN_MAX)
74cac757 3491 open_max = OPEN_MAX;
8ad758c7 3492# elif defined(_NFILE)
d2201af2 3493 open_max = _NFILE;
8ad758c7 3494# endif
767df6a1
JH
3495 if (open_max > 0) {
3496 long i;
3497 for (i = 0; i < open_max; i++)
d2201af2
AD
3498 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3499 STDIO_STREAM_ARRAY[i]._file < open_max &&
3500 STDIO_STREAM_ARRAY[i]._flag)
3501 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH
3502 return 0;
3503 }
8fbdfb7c 3504# endif
93189314 3505 SETERRNO(EBADF,RMS_IFI);
767df6a1 3506 return EOF;
74cac757 3507# endif
767df6a1
JH
3508#endif
3509}
097ee67d 3510
69282e91 3511void
45219de6 3512Perl_report_wrongway_fh(pTHX_ const GV *gv, const char have)
a5390457
NC
3513{
3514 if (ckWARN(WARN_IO)) {
0223a801 3515 HEK * const name
c6e4ff34 3516 = gv && (isGV_with_GP(gv))
0223a801 3517 ? GvENAME_HEK((gv))
3b46b707 3518 : NULL;
a5390457
NC
3519 const char * const direction = have == '>' ? "out" : "in";
3520
b3c81598 3521 if (name && HEK_LEN(name))
a5390457 3522 Perl_warner(aTHX_ packWARN(WARN_IO),
147e3846 3523 "Filehandle %" HEKf " opened only for %sput",
10bafe90 3524 HEKfARG(name), direction);
a5390457
NC
3525 else
3526 Perl_warner(aTHX_ packWARN(WARN_IO),
3527 "Filehandle opened only for %sput", direction);
3528 }
3529}
3530
<