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Netware patches from Ananth Kesari.
[perl5.git] / util.c
CommitLineData
a0d0e21e 1/* util.c
a687059c 2 *
bc89e66f 3 * Copyright (c) 1991-2001, Larry Wall
a687059c 4 *
d48672a2
LW		 5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
8d063cd8 7 *
8d063cd8 8 */
a0d0e21e
LW		 9
10/*
11 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
12 * not content." --Gandalf
13 */
8d063cd8 14
8d063cd8 15#include "EXTERN.h"
864dbfa3 16#define PERL_IN_UTIL_C
8d063cd8 17#include "perl.h"
62b28dd9 18
64ca3a65 19#ifndef PERL_MICRO
e1dfb34b 20#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
a687059c 21#include <signal.h>
62b28dd9 22#endif
a687059c 23
36477c24 24#ifndef SIG_ERR
25# define SIG_ERR ((Sighandler_t) -1)
26#endif
64ca3a65 27#endif
36477c24 28
a687059c
LW		 29#ifdef I_VFORK
30# include <vfork.h>
31#endif
32
94b6baf5
AD		 33/* Put this after #includes because fork and vfork prototypes may
34 conflict.
35*/
36#ifndef HAS_VFORK
37# define vfork fork
38#endif
39
ff68c719 40#ifdef I_SYS_WAIT
41# include <sys/wait.h>
42#endif
43
8d063cd8 44#define FLUSH
8d063cd8 45
a0d0e21e 46#ifdef LEAKTEST
a0d0e21e 47
8c52afec
IZ		 48long xcount[MAXXCOUNT];
49long lastxcount[MAXXCOUNT];
50long xycount[MAXXCOUNT][MAXYCOUNT];
51long lastxycount[MAXXCOUNT][MAXYCOUNT];
52
a0d0e21e 53#endif
a863c7d1 54
16cebae2
GS		 55#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
56# define FD_CLOEXEC 1 /* NeXT needs this */
57#endif
58
a687059c
LW		 59/* NOTE: Do not call the next three routines directly. Use the macros
60 * in handy.h, so that we can easily redefine everything to do tracking of
61 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 62 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW		 63 */
64
26fa51c3
AMS		 65/* paranoid version of system's malloc() */
66
bd4080b3 67Malloc_t
4f63d024 68Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 69{
54aff467 70 dTHX;
bd4080b3 71 Malloc_t ptr;
55497cff 72#ifdef HAS_64K_LIMIT
62b28dd9 73 if (size > 0xffff) {
bf49b057 74 PerlIO_printf(Perl_error_log,
16cebae2 75 "Allocation too large: %lx\n", size) FLUSH;
54aff467 76 my_exit(1);
62b28dd9 77 }
55497cff 78#endif /* HAS_64K_LIMIT */
34de22dd
LW		 79#ifdef DEBUGGING
80 if ((long)size < 0)
4f63d024 81 Perl_croak_nocontext("panic: malloc");
34de22dd 82#endif
12ae5dfc 83 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 84 PERL_ALLOC_CHECK(ptr);
97835f67 85 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
8d063cd8
LW		 86 if (ptr != Nullch)
87 return ptr;
3280af22 88 else if (PL_nomemok)
7c0587c8 89 return Nullch;
8d063cd8 90 else {
bf49b057 91 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 92 my_exit(1);
4e35701f 93 return Nullch;
8d063cd8
LW		 94 }
95 /*NOTREACHED*/
96}
97
f2517201 98/* paranoid version of system's realloc() */
8d063cd8 99
bd4080b3 100Malloc_t
4f63d024 101Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 102{
54aff467 103 dTHX;
bd4080b3 104 Malloc_t ptr;
9a34ef1d 105#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 106 Malloc_t PerlMem_realloc();
ecfc5424 107#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 108
a1d180c4 109#ifdef HAS_64K_LIMIT
5f05dabc 110 if (size > 0xffff) {
bf49b057 111 PerlIO_printf(Perl_error_log,
5f05dabc 112 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 113 my_exit(1);
5f05dabc 114 }
55497cff 115#endif /* HAS_64K_LIMIT */
7614df0c 116 if (!size) {
f2517201 117 safesysfree(where);
7614df0c
JD		 118 return NULL;
119 }
120
378cc40b 121 if (!where)
f2517201 122 return safesysmalloc(size);
34de22dd
LW		 123#ifdef DEBUGGING
124 if ((long)size < 0)
4f63d024 125 Perl_croak_nocontext("panic: realloc");
34de22dd 126#endif
12ae5dfc 127 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 128 PERL_ALLOC_CHECK(ptr);
a1d180c4 129
97835f67
JH		 130 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
131 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
79072805 132
8d063cd8
LW		 133 if (ptr != Nullch)
134 return ptr;
3280af22 135 else if (PL_nomemok)
7c0587c8 136 return Nullch;
8d063cd8 137 else {
bf49b057 138 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 139 my_exit(1);
4e35701f 140 return Nullch;
8d063cd8
LW		 141 }
142 /*NOTREACHED*/
143}
144
f2517201 145/* safe version of system's free() */
8d063cd8 146
54310121 147Free_t
4f63d024 148Perl_safesysfree(Malloc_t where)
8d063cd8 149{
155aba94 150#ifdef PERL_IMPLICIT_SYS
54aff467 151 dTHX;
155aba94 152#endif
97835f67 153 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 154 if (where) {
de3bb511 155 /*SUPPRESS 701*/
6ad3d225 156 PerlMem_free(where);
378cc40b 157 }
8d063cd8
LW		 158}
159
f2517201 160/* safe version of system's calloc() */
1050c9ca 161
bd4080b3 162Malloc_t
4f63d024 163Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 164{
54aff467 165 dTHX;
bd4080b3 166 Malloc_t ptr;
1050c9ca 167
55497cff 168#ifdef HAS_64K_LIMIT
5f05dabc 169 if (size * count > 0xffff) {
bf49b057 170 PerlIO_printf(Perl_error_log,
5f05dabc 171 "Allocation too large: %lx\n", size * count) FLUSH;
54aff467 172 my_exit(1);
5f05dabc 173 }
55497cff 174#endif /* HAS_64K_LIMIT */
1050c9ca 175#ifdef DEBUGGING
176 if ((long)size < 0 || (long)count < 0)
4f63d024 177 Perl_croak_nocontext("panic: calloc");
1050c9ca 178#endif
0b7c1c42 179 size *= count;
12ae5dfc 180 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 181 PERL_ALLOC_CHECK(ptr);
97835f67 182 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)size));
1050c9ca 183 if (ptr != Nullch) {
184 memset((void*)ptr, 0, size);
185 return ptr;
186 }
3280af22 187 else if (PL_nomemok)
1050c9ca 188 return Nullch;
189 else {
bf49b057 190 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 191 my_exit(1);
4e35701f 192 return Nullch;
1050c9ca 193 }
194 /*NOTREACHED*/
195}
196
a687059c
LW		 197#ifdef LEAKTEST
198
8c52afec
IZ		 199struct mem_test_strut {
200 union {
201 long type;
202 char c[2];
203 } u;
204 long size;
205};
206
207# define ALIGN sizeof(struct mem_test_strut)
208
209# define sizeof_chunk(ch) (((struct mem_test_strut*) (ch))->size)
210# define typeof_chunk(ch) \
211 (((struct mem_test_strut*) (ch))->u.c[0] + ((struct mem_test_strut*) (ch))->u.c[1]*100)
212# define set_typeof_chunk(ch,t) \
213 (((struct mem_test_strut*) (ch))->u.c[0] = t % 100, ((struct mem_test_strut*) (ch))->u.c[1] = t / 100)
214#define SIZE_TO_Y(size) ( (size) > MAXY_SIZE \
215 ? MAXYCOUNT - 1 \
216 : ( (size) > 40 \
217 ? ((size) - 1)/8 + 5 \
218 : ((size) - 1)/4))
8d063cd8 219
bd4080b3 220Malloc_t
4f63d024 221Perl_safexmalloc(I32 x, MEM_SIZE size)
8d063cd8 222{
8c52afec 223 register char* where = (char*)safemalloc(size + ALIGN);
8d063cd8 224
8c52afec
IZ		 225 xcount[x] += size;
226 xycount[x][SIZE_TO_Y(size)]++;
227 set_typeof_chunk(where, x);
228 sizeof_chunk(where) = size;
229 return (Malloc_t)(where + ALIGN);
8d063cd8 230}
8d063cd8 231
bd4080b3 232Malloc_t
4f63d024 233Perl_safexrealloc(Malloc_t wh, MEM_SIZE size)
a687059c 234{
8c52afec
IZ		 235 char *where = (char*)wh;
236
237 if (!wh)
238 return safexmalloc(0,size);
a1d180c4 239
8c52afec
IZ		 240 {
241 MEM_SIZE old = sizeof_chunk(where - ALIGN);
242 int t = typeof_chunk(where - ALIGN);
243 register char* new = (char*)saferealloc(where - ALIGN, size + ALIGN);
a1d180c4 244
8c52afec
IZ		 245 xycount[t][SIZE_TO_Y(old)]--;
246 xycount[t][SIZE_TO_Y(size)]++;
247 xcount[t] += size - old;
248 sizeof_chunk(new) = size;
249 return (Malloc_t)(new + ALIGN);
250 }
a687059c
LW		 251}
252
253void
4f63d024 254Perl_safexfree(Malloc_t wh)
a687059c 255{
79072805 256 I32 x;
8c52afec
IZ		 257 char *where = (char*)wh;
258 MEM_SIZE size;
a1d180c4 259
a687059c
LW		 260 if (!where)
261 return;
262 where -= ALIGN;
8c52afec 263 size = sizeof_chunk(where);
a687059c 264 x = where[0] + 100 * where[1];
8c52afec
IZ		 265 xcount[x] -= size;
266 xycount[x][SIZE_TO_Y(size)]--;
a687059c
LW		 267 safefree(where);
268}
269
bd4080b3 270Malloc_t
4f63d024 271Perl_safexcalloc(I32 x,MEM_SIZE count, MEM_SIZE size)
1050c9ca 272{
8c52afec
IZ		 273 register char * where = (char*)safexmalloc(x, size * count + ALIGN);
274 xcount[x] += size;
275 xycount[x][SIZE_TO_Y(size)]++;
276 memset((void*)(where + ALIGN), 0, size * count);
277 set_typeof_chunk(where, x);
278 sizeof_chunk(where) = size;
279 return (Malloc_t)(where + ALIGN);
1050c9ca 280}
281
864dbfa3 282STATIC void
cea2e8a9 283S_xstat(pTHX_ int flag)
8d063cd8 284{
8c52afec
IZ		 285 register I32 i, j, total = 0;
286 I32 subtot[MAXYCOUNT];
8d063cd8 287
8c52afec
IZ		 288 for (j = 0; j < MAXYCOUNT; j++) {
289 subtot[j] = 0;
290 }
a1d180c4 291
bf49b057 292 PerlIO_printf(Perl_debug_log, " Id subtot 4 8 12 16 20 24 28 32 36 40 48 56 64 72 80 80+\n", total);
a687059c 293 for (i = 0; i < MAXXCOUNT; i++) {
8c52afec
IZ		 294 total += xcount[i];
295 for (j = 0; j < MAXYCOUNT; j++) {
296 subtot[j] += xycount[i][j];
297 }
298 if (flag == 0
299 ? xcount[i] /* Have something */
a1d180c4 300 : (flag == 2
8c52afec
IZ		 301 ? xcount[i] != lastxcount[i] /* Changed */
302 : xcount[i] > lastxcount[i])) { /* Growed */
a1d180c4 303 PerlIO_printf(Perl_debug_log,"%2d %02d %7ld ", i / 100, i % 100,
8c52afec 304 flag == 2 ? xcount[i] - lastxcount[i] : xcount[i]);
a687059c 305 lastxcount[i] = xcount[i];
8c52afec 306 for (j = 0; j < MAXYCOUNT; j++) {
a1d180c4 307 if ( flag == 0
8c52afec 308 ? xycount[i][j] /* Have something */
a1d180c4 309 : (flag == 2
8c52afec
IZ		 310 ? xycount[i][j] != lastxycount[i][j] /* Changed */
311 : xycount[i][j] > lastxycount[i][j])) { /* Growed */
a1d180c4
NIS		 312 PerlIO_printf(Perl_debug_log,"%3ld ",
313 flag == 2
314 ? xycount[i][j] - lastxycount[i][j]
8c52afec
IZ		 315 : xycount[i][j]);
316 lastxycount[i][j] = xycount[i][j];
317 } else {
bf49b057 318 PerlIO_printf(Perl_debug_log, " . ", xycount[i][j]);
8c52afec
IZ		 319 }
320 }
bf49b057 321 PerlIO_printf(Perl_debug_log, "\n");
8c52afec
IZ		 322 }
323 }
324 if (flag != 2) {
bf49b057 325 PerlIO_printf(Perl_debug_log, "Total %7ld ", total);
8c52afec
IZ		 326 for (j = 0; j < MAXYCOUNT; j++) {
327 if (subtot[j]) {
bf49b057 328 PerlIO_printf(Perl_debug_log, "%3ld ", subtot[j]);
8c52afec 329 } else {
bf49b057 330 PerlIO_printf(Perl_debug_log, " . ");
8c52afec 331 }
8d063cd8 332 }
bf49b057 333 PerlIO_printf(Perl_debug_log, "\n");
8d063cd8 334 }
8d063cd8 335}
a687059c
LW		 336
337#endif /* LEAKTEST */
8d063cd8
LW		 338
339/* copy a string up to some (non-backslashed) delimiter, if any */
340
341char *
864dbfa3 342Perl_delimcpy(pTHX_ register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen)
8d063cd8 343{
fc36a67e 344 register I32 tolen;
345 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW		 346 if (*from == '\\') {
347 if (from[1] == delim)
348 from++;
fc36a67e 349 else {
350 if (to < toend)
351 *to++ = *from;
352 tolen++;
353 from++;
354 }
378cc40b 355 }
bedebaa5 356 else if (*from == delim)
8d063cd8 357 break;
fc36a67e 358 if (to < toend)
359 *to++ = *from;
8d063cd8 360 }
bedebaa5
CS		 361 if (to < toend)
362 *to = '\0';
fc36a67e 363 *retlen = tolen;
8d063cd8
LW		 364 return from;
365}
366
367/* return ptr to little string in big string, NULL if not found */
378cc40b 368/* This routine was donated by Corey Satten. */
8d063cd8
LW		 369
370char *
864dbfa3 371Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 372{
08105a92 373 register const char *s, *x;
79072805 374 register I32 first;
378cc40b 375
a687059c 376 if (!little)
08105a92 377 return (char*)big;
a687059c 378 first = *little++;
378cc40b 379 if (!first)
08105a92 380 return (char*)big;
378cc40b
LW		 381 while (*big) {
382 if (*big++ != first)
383 continue;
384 for (x=big,s=little; *s; /**/ ) {
385 if (!*x)
386 return Nullch;
387 if (*s++ != *x++) {
388 s--;
389 break;
390 }
391 }
392 if (!*s)
08105a92 393 return (char*)(big-1);
378cc40b
LW		 394 }
395 return Nullch;
396}
8d063cd8 397
a687059c
LW		 398/* same as instr but allow embedded nulls */
399
400char *
864dbfa3 401Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
8d063cd8 402{
08105a92 403 register const char *s, *x;
79072805 404 register I32 first = *little;
08105a92 405 register const char *littleend = lend;
378cc40b 406
a0d0e21e 407 if (!first && little >= littleend)
08105a92 408 return (char*)big;
de3bb511
LW		 409 if (bigend - big < littleend - little)
410 return Nullch;
a687059c
LW		 411 bigend -= littleend - little++;
412 while (big <= bigend) {
413 if (*big++ != first)
414 continue;
415 for (x=big,s=little; s < littleend; /**/ ) {
416 if (*s++ != *x++) {
417 s--;
418 break;
419 }
420 }
421 if (s >= littleend)
08105a92 422 return (char*)(big-1);
378cc40b 423 }
a687059c
LW		 424 return Nullch;
425}
426
427/* reverse of the above--find last substring */
428
429char *
864dbfa3 430Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 431{
08105a92
GS		 432 register const char *bigbeg;
433 register const char *s, *x;
79072805 434 register I32 first = *little;
08105a92 435 register const char *littleend = lend;
a687059c 436
a0d0e21e 437 if (!first && little >= littleend)
08105a92 438 return (char*)bigend;
a687059c
LW		 439 bigbeg = big;
440 big = bigend - (littleend - little++);
441 while (big >= bigbeg) {
442 if (*big-- != first)
443 continue;
444 for (x=big+2,s=little; s < littleend; /**/ ) {
445 if (*s++ != *x++) {
446 s--;
447 break;
448 }
449 }
450 if (s >= littleend)
08105a92 451 return (char*)(big+1);
378cc40b 452 }
a687059c 453 return Nullch;
378cc40b 454}
a687059c 455
cf93c79d
IZ		 456#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
457
458/* As a space optimization, we do not compile tables for strings of length
459 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
460 special-cased in fbm_instr().
461
462 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
463
954c1994
GS		 464/*
465=for apidoc fbm_compile
466
467Analyses the string in order to make fast searches on it using fbm_instr()
468-- the Boyer-Moore algorithm.
469
470=cut
471*/
472
378cc40b 473void
7506f9c3 474Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 475{
942e002e
GS		 476 register U8 *s;
477 register U8 *table;
79072805 478 register U32 i;
0b71040e 479 STRLEN len;
79072805
LW		 480 I32 rarest = 0;
481 U32 frequency = 256;
482
cf93c79d
IZ		 483 if (flags & FBMcf_TAIL)
484 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
942e002e 485 s = (U8*)SvPV_force(sv, len);
07f14f54 486 (void)SvUPGRADE(sv, SVt_PVBM);
cf93c79d
IZ		 487 if (len == 0) /* TAIL might be on on a zero-length string. */
488 return;
02128f11 489 if (len > 2) {
7506f9c3 490 U8 mlen;
cf93c79d
IZ		 491 unsigned char *sb;
492
7506f9c3 493 if (len > 255)
cf93c79d 494 mlen = 255;
7506f9c3
GS		 495 else
496 mlen = (U8)len;
497 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
cf93c79d 498 table = (unsigned char*)(SvPVX(sv) + len + FBM_TABLE_OFFSET);
7506f9c3
GS		 499 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
500 memset((void*)table, mlen, 256);
501 table[-1] = (U8)flags;
02128f11 502 i = 0;
7506f9c3 503 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ		 504 while (s >= sb) {
505 if (table[*s] == mlen)
7506f9c3 506 table[*s] = (U8)i;
cf93c79d
IZ		 507 s--, i++;
508 }
378cc40b 509 }
14befaf4 510 sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */
79072805 511 SvVALID_on(sv);
378cc40b 512
463ee0b2 513 s = (unsigned char*)(SvPVX(sv)); /* deeper magic */
bbce6d69 514 for (i = 0; i < len; i++) {
22c35a8c 515 if (PL_freq[s[i]] < frequency) {
bbce6d69 516 rarest = i;
22c35a8c 517 frequency = PL_freq[s[i]];
378cc40b
LW		 518 }
519 }
79072805
LW		 520 BmRARE(sv) = s[rarest];
521 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ		 522 BmUSEFUL(sv) = 100; /* Initial value */
523 if (flags & FBMcf_TAIL)
524 SvTAIL_on(sv);
7506f9c3
GS		 525 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
526 BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW		 527}
528
cf93c79d
IZ		 529/* If SvTAIL(littlestr), it has a fake '\n' at end. */
530/* If SvTAIL is actually due to \Z or \z, this gives false positives
531 if multiline */
532
954c1994
GS		 533/*
534=for apidoc fbm_instr
535
536Returns the location of the SV in the string delimited by C<str> and
537C<strend>. It returns C<Nullch> if the string can't be found. The C<sv>
538does not have to be fbm_compiled, but the search will not be as fast
539then.
540
541=cut
542*/
543
378cc40b 544char *
864dbfa3 545Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 546{
a687059c 547 register unsigned char *s;
cf93c79d
IZ		 548 STRLEN l;
549 register unsigned char *little = (unsigned char *)SvPV(littlestr,l);
550 register STRLEN littlelen = l;
551 register I32 multiline = flags & FBMrf_MULTILINE;
552
553 if (bigend - big < littlelen) {
a1d180c4 554 if ( SvTAIL(littlestr)
cf93c79d 555 && (bigend - big == littlelen - 1)
a1d180c4 556 && (littlelen == 1
12ae5dfc
JH		 557 || (*big == *little &&
558 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d
IZ		 559 return (char*)big;
560 return Nullch;
561 }
378cc40b 562
cf93c79d 563 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ		 564
565 if (littlelen == 1) {
566 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
567 /* Know that bigend != big. */
568 if (bigend[-1] == '\n')
569 return (char *)(bigend - 1);
570 return (char *) bigend;
571 }
572 s = big;
573 while (s < bigend) {
574 if (*s == *little)
575 return (char *)s;
576 s++;
577 }
578 if (SvTAIL(littlestr))
579 return (char *) bigend;
580 return Nullch;
581 }
582 if (!littlelen)
583 return (char*)big; /* Cannot be SvTAIL! */
584
585 /* littlelen is 2 */
586 if (SvTAIL(littlestr) && !multiline) {
587 if (bigend[-1] == '\n' && bigend[-2] == *little)
588 return (char*)bigend - 2;
589 if (bigend[-1] == *little)
590 return (char*)bigend - 1;
591 return Nullch;
592 }
593 {
594 /* This should be better than FBM if c1 == c2, and almost
595 as good otherwise: maybe better since we do less indirection.
596 And we save a lot of memory by caching no table. */
597 register unsigned char c1 = little[0];
598 register unsigned char c2 = little[1];
599
600 s = big + 1;
601 bigend--;
602 if (c1 != c2) {
603 while (s <= bigend) {
604 if (s[0] == c2) {
605 if (s[-1] == c1)
606 return (char*)s - 1;
607 s += 2;
608 continue;
3fe6f2dc 609 }
cf93c79d
IZ		 610 next_chars:
611 if (s[0] == c1) {
612 if (s == bigend)
613 goto check_1char_anchor;
614 if (s[1] == c2)
615 return (char*)s;
616 else {
617 s++;
618 goto next_chars;
619 }
620 }
621 else
622 s += 2;
623 }
624 goto check_1char_anchor;
625 }
626 /* Now c1 == c2 */
627 while (s <= bigend) {
628 if (s[0] == c1) {
629 if (s[-1] == c1)
630 return (char*)s - 1;
631 if (s == bigend)
632 goto check_1char_anchor;
633 if (s[1] == c1)
634 return (char*)s;
635 s += 3;
02128f11 636 }
c277df42 637 else
cf93c79d 638 s += 2;
c277df42 639 }
c277df42 640 }
cf93c79d
IZ		 641 check_1char_anchor: /* One char and anchor! */
642 if (SvTAIL(littlestr) && (*bigend == *little))
643 return (char *)bigend; /* bigend is already decremented. */
644 return Nullch;
d48672a2 645 }
cf93c79d 646 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 647 s = bigend - littlelen;
a1d180c4 648 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ		 649 /* Automatically of length > 2 */
650 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 651 {
bbce6d69 652 return (char*)s; /* how sweet it is */
7506f9c3
GS		 653 }
654 if (s[1] == *little
655 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
656 {
cf93c79d 657 return (char*)s + 1; /* how sweet it is */
7506f9c3 658 }
02128f11
IZ		 659 return Nullch;
660 }
cf93c79d
IZ		 661 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
662 char *b = ninstr((char*)big,(char*)bigend,
663 (char*)little, (char*)little + littlelen);
664
665 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
666 /* Chop \n from littlestr: */
667 s = bigend - littlelen + 1;
7506f9c3
GS		 668 if (*s == *little
669 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
670 {
3fe6f2dc 671 return (char*)s;
7506f9c3 672 }
cf93c79d 673 return Nullch;
a687059c 674 }
cf93c79d 675 return b;
a687059c 676 }
a1d180c4 677
cf93c79d
IZ		 678 { /* Do actual FBM. */
679 register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
680 register unsigned char *oldlittle;
681
682 if (littlelen > bigend - big)
683 return Nullch;
684 --littlelen; /* Last char found by table lookup */
685
686 s = big + littlelen;
687 little += littlelen; /* last char */
688 oldlittle = little;
689 if (s < bigend) {
690 register I32 tmp;
691
692 top2:
693 /*SUPPRESS 560*/
7506f9c3 694 if ((tmp = table[*s])) {
62b28dd9 695#ifdef POINTERRIGOR
cf93c79d
IZ		 696 if (bigend - s > tmp) {
697 s += tmp;
698 goto top2;
699 }
bbce6d69 700 s += tmp;
62b28dd9 701#else
cf93c79d 702 if ((s += tmp) < bigend)
62b28dd9 703 goto top2;
cf93c79d
IZ		 704#endif
705 goto check_end;
706 }
707 else { /* less expensive than calling strncmp() */
708 register unsigned char *olds = s;
709
710 tmp = littlelen;
711
712 while (tmp--) {
713 if (*--s == *--little)
714 continue;
cf93c79d
IZ		 715 s = olds + 1; /* here we pay the price for failure */
716 little = oldlittle;
717 if (s < bigend) /* fake up continue to outer loop */
718 goto top2;
719 goto check_end;
720 }
721 return (char *)s;
a687059c 722 }
378cc40b 723 }
cf93c79d
IZ		 724 check_end:
725 if ( s == bigend && (table[-1] & FBMcf_TAIL)
12ae5dfc
JH		 726 && memEQ((char *)(bigend - littlelen),
727 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d
IZ		 728 return (char*)bigend - littlelen;
729 return Nullch;
378cc40b 730 }
378cc40b
LW		 731}
732
c277df42
IZ		 733/* start_shift, end_shift are positive quantities which give offsets
734 of ends of some substring of bigstr.
735 If `last' we want the last occurence.
736 old_posp is the way of communication between consequent calls if
a1d180c4 737 the next call needs to find the .
c277df42 738 The initial *old_posp should be -1.
cf93c79d
IZ		 739
740 Note that we take into account SvTAIL, so one can get extra
741 optimizations if _ALL flag is set.
c277df42
IZ		 742 */
743
cf93c79d 744/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 745 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ		 746 is not supported yet. */
747
378cc40b 748char *
864dbfa3 749Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 750{
a687059c
LW		 751 register unsigned char *s, *x;
752 register unsigned char *big;
79072805
LW		 753 register I32 pos;
754 register I32 previous;
755 register I32 first;
a687059c 756 register unsigned char *little;
c277df42 757 register I32 stop_pos;
a687059c 758 register unsigned char *littleend;
c277df42 759 I32 found = 0;
378cc40b 760
c277df42 761 if (*old_posp == -1
3280af22 762 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 763 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
764 cant_find:
a1d180c4 765 if ( BmRARE(littlestr) == '\n'
cf93c79d
IZ		 766 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
767 little = (unsigned char *)(SvPVX(littlestr));
768 littleend = little + SvCUR(littlestr);
769 first = *little++;
770 goto check_tail;
771 }
378cc40b 772 return Nullch;
cf93c79d
IZ		 773 }
774
463ee0b2 775 little = (unsigned char *)(SvPVX(littlestr));
79072805 776 littleend = little + SvCUR(littlestr);
378cc40b 777 first = *little++;
c277df42 778 /* The value of pos we can start at: */
79072805 779 previous = BmPREVIOUS(littlestr);
463ee0b2 780 big = (unsigned char *)(SvPVX(bigstr));
c277df42
IZ		 781 /* The value of pos we can stop at: */
782 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 783 if (previous + start_shift > stop_pos) {
0fe87f7c
HS		 784/*
785 stop_pos does not include SvTAIL in the count, so this check is incorrect
786 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
787*/
788#if 0
cf93c79d
IZ		 789 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
790 goto check_tail;
0fe87f7c 791#endif
cf93c79d
IZ		 792 return Nullch;
793 }
c277df42 794 while (pos < previous + start_shift) {
3280af22 795 if (!(pos += PL_screamnext[pos]))
cf93c79d 796 goto cant_find;
378cc40b 797 }
de3bb511 798#ifdef POINTERRIGOR
bbce6d69 799 do {
ef64f398 800 if (pos >= stop_pos) break;
bbce6d69 801 if (big[pos-previous] != first)
802 continue;
803 for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) {
bbce6d69 804 if (*s++ != *x++) {
805 s--;
806 break;
de3bb511 807 }
bbce6d69 808 }
c277df42
IZ		 809 if (s == littleend) {
810 *old_posp = pos;
811 if (!last) return (char *)(big+pos-previous);
812 found = 1;
813 }
6b88bc9c 814 } while ( pos += PL_screamnext[pos] );
c277df42 815 return (last && found) ? (char *)(big+(*old_posp)-previous) : Nullch;
de3bb511
LW		 816#else /* !POINTERRIGOR */
817 big -= previous;
bbce6d69 818 do {
ef64f398 819 if (pos >= stop_pos) break;
bbce6d69 820 if (big[pos] != first)
821 continue;
822 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69 823 if (*s++ != *x++) {
824 s--;
825 break;
378cc40b 826 }
bbce6d69 827 }
c277df42
IZ		 828 if (s == littleend) {
829 *old_posp = pos;
830 if (!last) return (char *)(big+pos);
831 found = 1;
832 }
3280af22 833 } while ( pos += PL_screamnext[pos] );
a1d180c4 834 if (last && found)
cf93c79d 835 return (char *)(big+(*old_posp));
de3bb511 836#endif /* POINTERRIGOR */
cf93c79d
IZ		 837 check_tail:
838 if (!SvTAIL(littlestr) || (end_shift > 0))
839 return Nullch;
840 /* Ignore the trailing "\n". This code is not microoptimized */
841 big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr));
842 stop_pos = littleend - little; /* Actual littlestr len */
843 if (stop_pos == 0)
844 return (char*)big;
845 big -= stop_pos;
846 if (*big == first
12ae5dfc
JH		 847 && ((stop_pos == 1) ||
848 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d
IZ		 849 return (char*)big;
850 return Nullch;
8d063cd8
LW		 851}
852
79072805 853I32
864dbfa3 854Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 855{
bbce6d69 856 register U8 *a = (U8 *)s1;
857 register U8 *b = (U8 *)s2;
79072805 858 while (len--) {
22c35a8c 859 if (*a != *b && *a != PL_fold[*b])
bbce6d69 860 return 1;
861 a++,b++;
862 }
863 return 0;
864}
865
866I32
864dbfa3 867Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 868{
869 register U8 *a = (U8 *)s1;
870 register U8 *b = (U8 *)s2;
871 while (len--) {
22c35a8c 872 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69 873 return 1;
874 a++,b++;
79072805
LW		 875 }
876 return 0;
877}
878
8d063cd8
LW		 879/* copy a string to a safe spot */
880
954c1994
GS		 881/*
882=for apidoc savepv
883
884Copy a string to a safe spot. This does not use an SV.
885
886=cut
887*/
888
8d063cd8 889char *
864dbfa3 890Perl_savepv(pTHX_ const char *sv)
8d063cd8 891{
a687059c 892 register char *newaddr;
8d063cd8 893
79072805
LW		 894 New(902,newaddr,strlen(sv)+1,char);
895 (void)strcpy(newaddr,sv);
8d063cd8
LW		 896 return newaddr;
897}
898
a687059c
LW		 899/* same thing but with a known length */
900
954c1994
GS		 901/*
902=for apidoc savepvn
903
904Copy a string to a safe spot. The C<len> indicates number of bytes to
905copy. This does not use an SV.
906
907=cut
908*/
909
a687059c 910char *
864dbfa3 911Perl_savepvn(pTHX_ const char *sv, register I32 len)
a687059c
LW		 912{
913 register char *newaddr;
914
915 New(903,newaddr,len+1,char);
79072805 916 Copy(sv,newaddr,len,char); /* might not be null terminated */
a687059c
LW		 917 newaddr[len] = '\0'; /* is now */
918 return newaddr;
919}
920
cea2e8a9 921/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 922
76e3520e 923STATIC SV *
cea2e8a9 924S_mess_alloc(pTHX)
fc36a67e 925{
926 SV *sv;
927 XPVMG *any;
928
e72dc28c
GS		 929 if (!PL_dirty)
930 return sv_2mortal(newSVpvn("",0));
931
0372dbb6
GS		 932 if (PL_mess_sv)
933 return PL_mess_sv;
934
fc36a67e 935 /* Create as PVMG now, to avoid any upgrading later */
936 New(905, sv, 1, SV);
937 Newz(905, any, 1, XPVMG);
938 SvFLAGS(sv) = SVt_PVMG;
939 SvANY(sv) = (void*)any;
940 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 941 PL_mess_sv = sv;
fc36a67e 942 return sv;
943}
944
c5be433b 945#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 946char *
947Perl_form_nocontext(const char* pat, ...)
948{
949 dTHX;
c5be433b 950 char *retval;
cea2e8a9
GS		 951 va_list args;
952 va_start(args, pat);
c5be433b 953 retval = vform(pat, &args);
cea2e8a9 954 va_end(args);
c5be433b 955 return retval;
cea2e8a9 956}
c5be433b 957#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 958
8990e307 959char *
864dbfa3 960Perl_form(pTHX_ const char* pat, ...)
8990e307 961{
c5be433b 962 char *retval;
46fc3d4c 963 va_list args;
46fc3d4c 964 va_start(args, pat);
c5be433b 965 retval = vform(pat, &args);
46fc3d4c 966 va_end(args);
c5be433b
GS		 967 return retval;
968}
969
970char *
971Perl_vform(pTHX_ const char *pat, va_list *args)
972{
973 SV *sv = mess_alloc();
974 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
e72dc28c 975 return SvPVX(sv);
46fc3d4c 976}
a687059c 977
5a844595
GS		 978#if defined(PERL_IMPLICIT_CONTEXT)
979SV *
980Perl_mess_nocontext(const char *pat, ...)
981{
982 dTHX;
983 SV *retval;
984 va_list args;
985 va_start(args, pat);
986 retval = vmess(pat, &args);
987 va_end(args);
988 return retval;
989}
990#endif /* PERL_IMPLICIT_CONTEXT */
991
06bf62c7 992SV *
5a844595
GS		 993Perl_mess(pTHX_ const char *pat, ...)
994{
995 SV *retval;
996 va_list args;
997 va_start(args, pat);
998 retval = vmess(pat, &args);
999 va_end(args);
1000 return retval;
1001}
1002
1003SV *
1004Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1005{
e72dc28c 1006 SV *sv = mess_alloc();
46fc3d4c 1007 static char dgd[] = " during global destruction.\n";
1008
fc36a67e 1009 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
46fc3d4c 1010 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
57843af0 1011 if (CopLINE(PL_curcop))
ed094faf
GS		 1012 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
1013 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
515f54a1
GS		 1014 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
1015 bool line_mode = (RsSIMPLE(PL_rs) &&
7c1e0849 1016 SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
57def98f 1017 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
cf2093f6 1018 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
a1d180c4 1019 line_mode ? "line" : "chunk",
cf2093f6 1020 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1021 }
9efbc0eb 1022#ifdef USE_THREADS
e8e6f333
GS		 1023 if (thr->tid)
1024 Perl_sv_catpvf(aTHX_ sv, " thread %ld", thr->tid);
9efbc0eb 1025#endif
515f54a1 1026 sv_catpv(sv, PL_dirty ? dgd : ".\n");
a687059c 1027 }
06bf62c7 1028 return sv;
a687059c
LW		 1029}
1030
c5be433b
GS		 1031OP *
1032Perl_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1033{
36477c24 1034 char *message;
3280af22 1035 int was_in_eval = PL_in_eval;
36477c24 1036 HV *stash;
1037 GV *gv;
1038 CV *cv;
06bf62c7
GS		 1039 SV *msv;
1040 STRLEN msglen;
36477c24 1041
bf49b057 1042 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1043 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1044 thr, PL_curstack, PL_mainstack));
36477c24 1045
06bf62c7 1046 if (pat) {
5a844595
GS		 1047 msv = vmess(pat, args);
1048 if (PL_errors && SvCUR(PL_errors)) {
1049 sv_catsv(PL_errors, msv);
1050 message = SvPV(PL_errors, msglen);
1051 SvCUR_set(PL_errors, 0);
1052 }
1053 else
1054 message = SvPV(msv,msglen);
06bf62c7
GS		 1055 }
1056 else {
1057 message = Nullch;
0f79a09d 1058 msglen = 0;
06bf62c7 1059 }
36477c24 1060
bf49b057 1061 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1062 "%p: die: message = %s\ndiehook = %p\n",
533c011a 1063 thr, message, PL_diehook));
3280af22 1064 if (PL_diehook) {
cea2e8a9 1065 /* sv_2cv might call Perl_croak() */
3280af22 1066 SV *olddiehook = PL_diehook;
1738f5c4 1067 ENTER;
3280af22
NIS		 1068 SAVESPTR(PL_diehook);
1069 PL_diehook = Nullsv;
1738f5c4
CS		 1070 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1071 LEAVE;
1072 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1073 dSP;
774d564b 1074 SV *msg;
1075
1076 ENTER;
3a1f2dc9 1077 save_re_context();
79cb57f6 1078 if (message) {
06bf62c7 1079 msg = newSVpvn(message, msglen);
4e6ea2c3
GS		 1080 SvREADONLY_on(msg);
1081 SAVEFREESV(msg);
1082 }
1083 else {
1084 msg = ERRSV;
1085 }
1738f5c4 1086
e788e7d3 1087 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1088 PUSHMARK(SP);
1738f5c4
CS		 1089 XPUSHs(msg);
1090 PUTBACK;
0cdb2077 1091 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1092 POPSTACK;
774d564b 1093 LEAVE;
1738f5c4 1094 }
36477c24 1095 }
1096
06bf62c7 1097 PL_restartop = die_where(message, msglen);
bf49b057 1098 DEBUG_S(PerlIO_printf(Perl_debug_log,
7c06b590 1099 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1100 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1101 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1102 JMPENV_JUMP(3);
3280af22 1103 return PL_restartop;
36477c24 1104}
1105
c5be433b 1106#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1107OP *
1108Perl_die_nocontext(const char* pat, ...)
a687059c 1109{
cea2e8a9
GS		 1110 dTHX;
1111 OP *o;
a687059c 1112 va_list args;
cea2e8a9 1113 va_start(args, pat);
c5be433b 1114 o = vdie(pat, &args);
cea2e8a9
GS		 1115 va_end(args);
1116 return o;
1117}
c5be433b 1118#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS		 1119
1120OP *
1121Perl_die(pTHX_ const char* pat, ...)
1122{
1123 OP *o;
1124 va_list args;
1125 va_start(args, pat);
c5be433b 1126 o = vdie(pat, &args);
cea2e8a9
GS		 1127 va_end(args);
1128 return o;
1129}
1130
c5be433b
GS		 1131void
1132Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1133{
de3bb511 1134 char *message;
748a9306
LW		 1135 HV *stash;
1136 GV *gv;
1137 CV *cv;
06bf62c7
GS		 1138 SV *msv;
1139 STRLEN msglen;
a687059c 1140
9983fa3c
GS		 1141 if (pat) {
1142 msv = vmess(pat, args);
1143 if (PL_errors && SvCUR(PL_errors)) {
1144 sv_catsv(PL_errors, msv);
1145 message = SvPV(PL_errors, msglen);
1146 SvCUR_set(PL_errors, 0);
1147 }
1148 else
1149 message = SvPV(msv,msglen);
1150 }
1151 else {
1152 message = Nullch;
1153 msglen = 0;
5a844595 1154 }
5a844595 1155
b900a521
JH		 1156 DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s",
1157 PTR2UV(thr), message));
5a844595 1158
3280af22 1159 if (PL_diehook) {
cea2e8a9 1160 /* sv_2cv might call Perl_croak() */
3280af22 1161 SV *olddiehook = PL_diehook;
1738f5c4 1162 ENTER;
3280af22
NIS		 1163 SAVESPTR(PL_diehook);
1164 PL_diehook = Nullsv;
20cec16a 1165 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1738f5c4
CS		 1166 LEAVE;
1167 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1168 dSP;
774d564b 1169 SV *msg;
1170
1171 ENTER;
3a1f2dc9 1172 save_re_context();
9983fa3c
GS		 1173 if (message) {
1174 msg = newSVpvn(message, msglen);
1175 SvREADONLY_on(msg);
1176 SAVEFREESV(msg);
1177 }
1178 else {
1179 msg = ERRSV;
1180 }
20cec16a 1181
e788e7d3 1182 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1183 PUSHMARK(SP);
1738f5c4 1184 XPUSHs(msg);
20cec16a 1185 PUTBACK;
864dbfa3 1186 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1187 POPSTACK;
774d564b 1188 LEAVE;
20cec16a 1189 }
748a9306 1190 }
3280af22 1191 if (PL_in_eval) {
06bf62c7 1192 PL_restartop = die_where(message, msglen);
6224f72b 1193 JMPENV_JUMP(3);
a0d0e21e 1194 }
d175a3f0
GS		 1195 {
1196#ifdef USE_SFIO
1197 /* SFIO can really mess with your errno */
1198 int e = errno;
1199#endif
bf49b057
GS		 1200 PerlIO *serr = Perl_error_log;
1201
1202 PerlIO_write(serr, message, msglen);
1203 (void)PerlIO_flush(serr);
d175a3f0
GS		 1204#ifdef USE_SFIO
1205 errno = e;
1206#endif
1207 }
f86702cc 1208 my_failure_exit();
a687059c
LW		 1209}
1210
c5be433b 1211#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1212void
cea2e8a9 1213Perl_croak_nocontext(const char *pat, ...)
a687059c 1214{
cea2e8a9 1215 dTHX;
a687059c 1216 va_list args;
cea2e8a9 1217 va_start(args, pat);
c5be433b 1218 vcroak(pat, &args);
cea2e8a9
GS		 1219 /* NOTREACHED */
1220 va_end(args);
1221}
1222#endif /* PERL_IMPLICIT_CONTEXT */
1223
954c1994
GS		 1224/*
1225=for apidoc croak
1226
9983fa3c
GS		 1227This is the XSUB-writer's interface to Perl's C<die> function.
1228Normally use this function the same way you use the C C<printf>
1229function. See C<warn>.
1230
1231If you want to throw an exception object, assign the object to
1232C<$@> and then pass C<Nullch> to croak():
1233
1234 errsv = get_sv("@", TRUE);
1235 sv_setsv(errsv, exception_object);
1236 croak(Nullch);
954c1994
GS		 1237
1238=cut
1239*/
1240
cea2e8a9
GS		 1241void
1242Perl_croak(pTHX_ const char *pat, ...)
1243{
1244 va_list args;
1245 va_start(args, pat);
c5be433b 1246 vcroak(pat, &args);
cea2e8a9
GS		 1247 /* NOTREACHED */
1248 va_end(args);
1249}
1250
c5be433b
GS		 1251void
1252Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1253{
de3bb511 1254 char *message;
748a9306
LW		 1255 HV *stash;
1256 GV *gv;
1257 CV *cv;
06bf62c7
GS		 1258 SV *msv;
1259 STRLEN msglen;
a687059c 1260
5a844595 1261 msv = vmess(pat, args);
06bf62c7 1262 message = SvPV(msv, msglen);
a687059c 1263
3280af22 1264 if (PL_warnhook) {
cea2e8a9 1265 /* sv_2cv might call Perl_warn() */
3280af22 1266 SV *oldwarnhook = PL_warnhook;
1738f5c4 1267 ENTER;
3280af22
NIS		 1268 SAVESPTR(PL_warnhook);
1269 PL_warnhook = Nullsv;
20cec16a 1270 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS		 1271 LEAVE;
1272 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1273 dSP;
774d564b 1274 SV *msg;
1275
1276 ENTER;
3a1f2dc9 1277 save_re_context();
06bf62c7 1278 msg = newSVpvn(message, msglen);
774d564b 1279 SvREADONLY_on(msg);
1280 SAVEFREESV(msg);
1281
e788e7d3 1282 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1283 PUSHMARK(SP);
774d564b 1284 XPUSHs(msg);
20cec16a 1285 PUTBACK;
864dbfa3 1286 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1287 POPSTACK;
774d564b 1288 LEAVE;
20cec16a 1289 return;
1290 }
748a9306 1291 }
bf49b057
GS		 1292 {
1293 PerlIO *serr = Perl_error_log;
1294
1295 PerlIO_write(serr, message, msglen);
a687059c 1296#ifdef LEAKTEST
a1d180c4 1297 DEBUG_L(*message == '!'
bf49b057
GS		 1298 ? (xstat(message[1]=='!'
1299 ? (message[2]=='!' ? 2 : 1)
1300 : 0)
1301 , 0)
1302 : 0);
a687059c 1303#endif
bf49b057
GS		 1304 (void)PerlIO_flush(serr);
1305 }
a687059c 1306}
8d063cd8 1307
c5be433b 1308#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1309void
1310Perl_warn_nocontext(const char *pat, ...)
1311{
1312 dTHX;
1313 va_list args;
1314 va_start(args, pat);
c5be433b 1315 vwarn(pat, &args);
cea2e8a9
GS		 1316 va_end(args);
1317}
1318#endif /* PERL_IMPLICIT_CONTEXT */
1319
954c1994
GS		 1320/*
1321=for apidoc warn
1322
1323This is the XSUB-writer's interface to Perl's C<warn> function. Use this
1324function the same way you use the C C<printf> function. See
1325C<croak>.
1326
1327=cut
1328*/
1329
cea2e8a9
GS		 1330void
1331Perl_warn(pTHX_ const char *pat, ...)
1332{
1333 va_list args;
1334 va_start(args, pat);
c5be433b 1335 vwarn(pat, &args);
cea2e8a9
GS		 1336 va_end(args);
1337}
1338
c5be433b
GS		 1339#if defined(PERL_IMPLICIT_CONTEXT)
1340void
1341Perl_warner_nocontext(U32 err, const char *pat, ...)
1342{
1343 dTHX;
1344 va_list args;
1345 va_start(args, pat);
1346 vwarner(err, pat, &args);
1347 va_end(args);
1348}
1349#endif /* PERL_IMPLICIT_CONTEXT */
1350
599cee73 1351void
864dbfa3 1352Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM		 1353{
1354 va_list args;
c5be433b
GS		 1355 va_start(args, pat);
1356 vwarner(err, pat, &args);
1357 va_end(args);
1358}
1359
1360void
1361Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1362{
599cee73
PM		 1363 char *message;
1364 HV *stash;
1365 GV *gv;
1366 CV *cv;
06bf62c7
GS		 1367 SV *msv;
1368 STRLEN msglen;
599cee73 1369
5a844595 1370 msv = vmess(pat, args);
06bf62c7 1371 message = SvPV(msv, msglen);
599cee73
PM		 1372
1373 if (ckDEAD(err)) {
1374#ifdef USE_THREADS
b900a521 1375 DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s", PTR2UV(thr), message));
599cee73
PM		 1376#endif /* USE_THREADS */
1377 if (PL_diehook) {
cea2e8a9 1378 /* sv_2cv might call Perl_croak() */
599cee73
PM		 1379 SV *olddiehook = PL_diehook;
1380 ENTER;
1381 SAVESPTR(PL_diehook);
1382 PL_diehook = Nullsv;
1383 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1384 LEAVE;
1385 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1386 dSP;
1387 SV *msg;
a1d180c4 1388
599cee73 1389 ENTER;
3a1f2dc9 1390 save_re_context();
06bf62c7 1391 msg = newSVpvn(message, msglen);
599cee73
PM		 1392 SvREADONLY_on(msg);
1393 SAVEFREESV(msg);
a1d180c4 1394
3a1f2dc9 1395 PUSHSTACKi(PERLSI_DIEHOOK);
599cee73
PM		 1396 PUSHMARK(sp);
1397 XPUSHs(msg);
1398 PUTBACK;
864dbfa3 1399 call_sv((SV*)cv, G_DISCARD);
3a1f2dc9 1400 POPSTACK;
599cee73
PM		 1401 LEAVE;
1402 }
1403 }
1404 if (PL_in_eval) {
06bf62c7 1405 PL_restartop = die_where(message, msglen);
599cee73
PM		 1406 JMPENV_JUMP(3);
1407 }
bf49b057
GS		 1408 {
1409 PerlIO *serr = Perl_error_log;
1410 PerlIO_write(serr, message, msglen);
1411 (void)PerlIO_flush(serr);
1412 }
599cee73
PM		 1413 my_failure_exit();
1414
1415 }
1416 else {
1417 if (PL_warnhook) {
cea2e8a9 1418 /* sv_2cv might call Perl_warn() */
599cee73
PM		 1419 SV *oldwarnhook = PL_warnhook;
1420 ENTER;
1421 SAVESPTR(PL_warnhook);
1422 PL_warnhook = Nullsv;
1423 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
3a1f2dc9 1424 LEAVE;
599cee73
PM		 1425 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1426 dSP;
1427 SV *msg;
a1d180c4 1428
599cee73 1429 ENTER;
3a1f2dc9 1430 save_re_context();
06bf62c7 1431 msg = newSVpvn(message, msglen);
599cee73
PM		 1432 SvREADONLY_on(msg);
1433 SAVEFREESV(msg);
a1d180c4 1434
3a1f2dc9 1435 PUSHSTACKi(PERLSI_WARNHOOK);
599cee73
PM		 1436 PUSHMARK(sp);
1437 XPUSHs(msg);
1438 PUTBACK;
864dbfa3 1439 call_sv((SV*)cv, G_DISCARD);
3a1f2dc9 1440 POPSTACK;
599cee73
PM		 1441 LEAVE;
1442 return;
1443 }
1444 }
bf49b057
GS		 1445 {
1446 PerlIO *serr = Perl_error_log;
1447 PerlIO_write(serr, message, msglen);
599cee73 1448#ifdef LEAKTEST
a1d180c4 1449 DEBUG_L(*message == '!'
06247ec9
JH		 1450 ? (xstat(message[1]=='!'
1451 ? (message[2]=='!' ? 2 : 1)
1452 : 0)
1453 , 0)
1454 : 0);
599cee73 1455#endif
bf49b057
GS		 1456 (void)PerlIO_flush(serr);
1457 }
599cee73
PM		 1458 }
1459}
1460
13b6e58c
JH		 1461#ifdef USE_ENVIRON_ARRAY
1462 /* VMS' and EPOC's my_setenv() is in vms.c and epoc.c */
2986a63f 1463#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1464void
864dbfa3 1465Perl_my_setenv(pTHX_ char *nam, char *val)
8d063cd8 1466{
f2517201
GS		 1467#ifndef PERL_USE_SAFE_PUTENV
1468 /* most putenv()s leak, so we manipulate environ directly */
79072805 1469 register I32 i=setenv_getix(nam); /* where does it go? */
8d063cd8 1470
3280af22 1471 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW		 1472 I32 j;
1473 I32 max;
fe14fcc3
LW		 1474 char **tmpenv;
1475
de3bb511 1476 /*SUPPRESS 530*/
fe14fcc3 1477 for (max = i; environ[max]; max++) ;
f2517201
GS		 1478 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1479 for (j=0; j<max; j++) { /* copy environment */
1480 tmpenv[j] = (char*)safesysmalloc((strlen(environ[j])+1)*sizeof(char));
1481 strcpy(tmpenv[j], environ[j]);
1482 }
fe14fcc3
LW		 1483 tmpenv[max] = Nullch;
1484 environ = tmpenv; /* tell exec where it is now */
1485 }
a687059c 1486 if (!val) {
f2517201 1487 safesysfree(environ[i]);
a687059c
LW		 1488 while (environ[i]) {
1489 environ[i] = environ[i+1];
1490 i++;
1491 }
1492 return;
1493 }
8d063cd8 1494 if (!environ[i]) { /* does not exist yet */
f2517201 1495 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW		 1496 environ[i+1] = Nullch; /* make sure it's null terminated */
1497 }
fe14fcc3 1498 else
f2517201
GS		 1499 safesysfree(environ[i]);
1500 environ[i] = (char*)safesysmalloc((strlen(nam)+strlen(val)+2) * sizeof(char));
1501
a687059c 1502 (void)sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */
f2517201
GS		 1503
1504#else /* PERL_USE_SAFE_PUTENV */
47dafe4d
EF		 1505# if defined(__CYGWIN__)
1506 setenv(nam, val, 1);
1507# else
f2517201
GS		 1508 char *new_env;
1509
1510 new_env = (char*)safesysmalloc((strlen(nam) + strlen(val) + 2) * sizeof(char));
f2517201 1511 (void)sprintf(new_env,"%s=%s",nam,val);/* all that work just for this */
f2517201 1512 (void)putenv(new_env);
47dafe4d 1513# endif /* __CYGWIN__ */
f2517201 1514#endif /* PERL_USE_SAFE_PUTENV */
8d063cd8
LW		 1515}
1516
2986a63f 1517#else /* WIN32 || NETWARE */
68dc0745 1518
1519void
864dbfa3 1520Perl_my_setenv(pTHX_ char *nam,char *val)
68dc0745 1521{
ac5c734f
GS		 1522 register char *envstr;
1523 STRLEN len = strlen(nam) + 3;
1524 if (!val) {
1525 val = "";
1526 }
1527 len += strlen(val);
1528 New(904, envstr, len, char);
1529 (void)sprintf(envstr,"%s=%s",nam,val);
1530 (void)PerlEnv_putenv(envstr);
1531 Safefree(envstr);
3e3baf6d
TB		 1532}
1533
2986a63f 1534#endif /* WIN32 || NETWARE */
3e3baf6d
TB		 1535
1536I32
864dbfa3 1537Perl_setenv_getix(pTHX_ char *nam)
3e3baf6d
TB		 1538{
1539 register I32 i, len = strlen(nam);
1540
1541 for (i = 0; environ[i]; i++) {
1542 if (
1543#ifdef WIN32
1544 strnicmp(environ[i],nam,len) == 0
1545#else
1546 strnEQ(environ[i],nam,len)
1547#endif
1548 && environ[i][len] == '=')
1549 break; /* strnEQ must come first to avoid */
1550 } /* potential SEGV's */
1551 return i;
68dc0745 1552}
1553
ed79a026 1554#endif /* !VMS && !EPOC*/
378cc40b 1555
16d20bd9 1556#ifdef UNLINK_ALL_VERSIONS
79072805 1557I32
864dbfa3 1558Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
378cc40b 1559{
79072805 1560 I32 i;
378cc40b 1561
6ad3d225 1562 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW		 1563 return i ? 0 : -1;
1564}
1565#endif
1566
7a3f2258 1567/* this is a drop-in replacement for bcopy() */
2253333f 1568#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1569char *
7a3f2258 1570Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b
LW		 1571{
1572 char *retval = to;
1573
7c0587c8
LW		 1574 if (from - to >= 0) {
1575 while (len--)
1576 *to++ = *from++;
1577 }
1578 else {
1579 to += len;
1580 from += len;
1581 while (len--)
faf8582f 1582 *(--to) = *(--from);
7c0587c8 1583 }
378cc40b
LW		 1584 return retval;
1585}
ffed7fef 1586#endif
378cc40b 1587
7a3f2258 1588/* this is a drop-in replacement for memset() */
fc36a67e 1589#ifndef HAS_MEMSET
1590void *
7a3f2258 1591Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1592{
1593 char *retval = loc;
1594
1595 while (len--)
1596 *loc++ = ch;
1597 return retval;
1598}
1599#endif
1600
7a3f2258 1601/* this is a drop-in replacement for bzero() */
7c0587c8 1602#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1603char *
7a3f2258 1604Perl_my_bzero(register char *loc, register I32 len)
378cc40b
LW		 1605{
1606 char *retval = loc;
1607
1608 while (len--)
1609 *loc++ = 0;
1610 return retval;
1611}
1612#endif
7c0587c8 1613
7a3f2258 1614/* this is a drop-in replacement for memcmp() */
36477c24 1615#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1616I32
7a3f2258 1617Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1618{
36477c24 1619 register U8 *a = (U8 *)s1;
1620 register U8 *b = (U8 *)s2;
79072805 1621 register I32 tmp;
7c0587c8
LW		 1622
1623 while (len--) {
36477c24 1624 if (tmp = *a++ - *b++)
7c0587c8
LW		 1625 return tmp;
1626 }
1627 return 0;
1628}
36477c24 1629#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1630
fe14fcc3 1631#ifndef HAS_VPRINTF
a687059c 1632
85e6fe83 1633#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1634char *
1635#else
1636int
1637#endif
08105a92 1638vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 1639{
1640 FILE fakebuf;
1641
1642 fakebuf._ptr = dest;
1643 fakebuf._cnt = 32767;
35c8bce7
LW		 1644#ifndef _IOSTRG
1645#define _IOSTRG 0
1646#endif
a687059c
LW		 1647 fakebuf._flag = _IOWRT|_IOSTRG;
1648 _doprnt(pat, args, &fakebuf); /* what a kludge */
1649 (void)putc('\0', &fakebuf);
85e6fe83 1650#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1651 return(dest);
1652#else
1653 return 0; /* perl doesn't use return value */
1654#endif
1655}
1656
fe14fcc3 1657#endif /* HAS_VPRINTF */
a687059c
LW		 1658
1659#ifdef MYSWAP
ffed7fef 1660#if BYTEORDER != 0x4321
a687059c 1661short
864dbfa3 1662Perl_my_swap(pTHX_ short s)
a687059c
LW		 1663{
1664#if (BYTEORDER & 1) == 0
1665 short result;
1666
1667 result = ((s & 255) << 8) + ((s >> 8) & 255);
1668 return result;
1669#else
1670 return s;
1671#endif
1672}
1673
1674long
864dbfa3 1675Perl_my_htonl(pTHX_ long l)
a687059c
LW		 1676{
1677 union {
1678 long result;
ffed7fef 1679 char c[sizeof(long)];
a687059c
LW		 1680 } u;
1681
ffed7fef 1682#if BYTEORDER == 0x1234
a687059c
LW		 1683 u.c[0] = (l >> 24) & 255;
1684 u.c[1] = (l >> 16) & 255;
1685 u.c[2] = (l >> 8) & 255;
1686 u.c[3] = l & 255;
1687 return u.result;
1688#else
ffed7fef 1689#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1690 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1691#else
79072805
LW		 1692 register I32 o;
1693 register I32 s;
a687059c 1694
ffed7fef
LW		 1695 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1696 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 1697 }
1698 return u.result;
1699#endif
1700#endif
1701}
1702
1703long
864dbfa3 1704Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 1705{
1706 union {
1707 long l;
ffed7fef 1708 char c[sizeof(long)];
a687059c
LW		 1709 } u;
1710
ffed7fef 1711#if BYTEORDER == 0x1234
a687059c
LW		 1712 u.c[0] = (l >> 24) & 255;
1713 u.c[1] = (l >> 16) & 255;
1714 u.c[2] = (l >> 8) & 255;
1715 u.c[3] = l & 255;
1716 return u.l;
1717#else
ffed7fef 1718#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1719 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1720#else
79072805
LW		 1721 register I32 o;
1722 register I32 s;
a687059c
LW		 1723
1724 u.l = l;
1725 l = 0;
ffed7fef
LW		 1726 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1727 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 1728 }
1729 return l;
1730#endif
1731#endif
1732}
1733
ffed7fef 1734#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 1735#endif /* MYSWAP */
1736
1737/*
1738 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1739 * If these functions are defined,
1740 * the BYTEORDER is neither 0x1234 nor 0x4321.
1741 * However, this is not assumed.
1742 * -DWS
1743 */
1744
1745#define HTOV(name,type) \
1746 type \
ba106d47 1747 name (register type n) \
988174c1
LW		 1748 { \
1749 union { \
1750 type value; \
1751 char c[sizeof(type)]; \
1752 } u; \
79072805
LW		 1753 register I32 i; \
1754 register I32 s; \
988174c1
LW		 1755 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1756 u.c[i] = (n >> s) & 0xFF; \
1757 } \
1758 return u.value; \
1759 }
1760
1761#define VTOH(name,type) \
1762 type \
ba106d47 1763 name (register type n) \
988174c1
LW		 1764 { \
1765 union { \
1766 type value; \
1767 char c[sizeof(type)]; \
1768 } u; \
79072805
LW		 1769 register I32 i; \
1770 register I32 s; \
988174c1
LW		 1771 u.value = n; \
1772 n = 0; \
1773 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1774 n += (u.c[i] & 0xFF) << s; \
1775 } \
1776 return n; \
1777 }
1778
1779#if defined(HAS_HTOVS) && !defined(htovs)
1780HTOV(htovs,short)
1781#endif
1782#if defined(HAS_HTOVL) && !defined(htovl)
1783HTOV(htovl,long)
1784#endif
1785#if defined(HAS_VTOHS) && !defined(vtohs)
1786VTOH(vtohs,short)
1787#endif
1788#if defined(HAS_VTOHL) && !defined(vtohl)
1789VTOH(vtohl,long)
1790#endif
a687059c 1791
4a7d1889
NIS		 1792PerlIO *
1793Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
1794{
2986a63f 1795#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
1f852d0d
NIS		 1796 int p[2];
1797 register I32 This, that;
1798 register Pid_t pid;
1799 SV *sv;
1800 I32 did_pipes = 0;
1801 int pp[2];
1802
1803 PERL_FLUSHALL_FOR_CHILD;
1804 This = (*mode == 'w');
1805 that = !This;
1806 if (PL_tainting) {
1807 taint_env();
1808 taint_proper("Insecure %s%s", "EXEC");
1809 }
1810 if (PerlProc_pipe(p) < 0)
1811 return Nullfp;
1812 /* Try for another pipe pair for error return */
1813 if (PerlProc_pipe(pp) >= 0)
1814 did_pipes = 1;
1815 while ((pid = vfork()) < 0) {
1816 if (errno != EAGAIN) {
1817 PerlLIO_close(p[This]);
1818 if (did_pipes) {
1819 PerlLIO_close(pp[0]);
1820 PerlLIO_close(pp[1]);
1821 }
1822 return Nullfp;
1823 }
1824 sleep(5);
1825 }
1826 if (pid == 0) {
1827 /* Child */
1f852d0d
NIS		 1828#undef THIS
1829#undef THAT
1830#define THIS that
1831#define THAT This
1832 /* Close parent's end of _the_ pipe */
1833 PerlLIO_close(p[THAT]);
1834 /* Close parent's end of error status pipe (if any) */
1835 if (did_pipes) {
1836 PerlLIO_close(pp[0]);
1837#if defined(HAS_FCNTL) && defined(F_SETFD)
1838 /* Close error pipe automatically if exec works */
1839 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1840#endif
1841 }
1842 /* Now dup our end of _the_ pipe to right position */
1843 if (p[THIS] != (*mode == 'r')) {
1844 PerlLIO_dup2(p[THIS], *mode == 'r');
1845 PerlLIO_close(p[THIS]);
1846 }
1847#if !defined(HAS_FCNTL) || !defined(F_SETFD)
1848 /* No automatic close - do it by hand */
b7953727
JH		 1849# ifndef NOFILE
1850# define NOFILE 20
1851# endif
a080fe3d
NIS		 1852 {
1853 int fd;
1854
1855 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
1856 if (fd != pp[1])
1857 PerlLIO_close(fd);
1858 }
1f852d0d
NIS		 1859 }
1860#endif
1861 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
1862 PerlProc__exit(1);
1863#undef THIS
1864#undef THAT
1865 }
1866 /* Parent */
1867 do_execfree(); /* free any memory malloced by child on vfork */
1868 /* Close child's end of pipe */
1869 PerlLIO_close(p[that]);
1870 if (did_pipes)
1871 PerlLIO_close(pp[1]);
1872 /* Keep the lower of the two fd numbers */
1873 if (p[that] < p[This]) {
1874 PerlLIO_dup2(p[This], p[that]);
1875 PerlLIO_close(p[This]);
1876 p[This] = p[that];
1877 }
1878 LOCK_FDPID_MUTEX;
1879 sv = *av_fetch(PL_fdpid,p[This],TRUE);
1880 UNLOCK_FDPID_MUTEX;
1881 (void)SvUPGRADE(sv,SVt_IV);
1882 SvIVX(sv) = pid;
1883 PL_forkprocess = pid;
1884 /* If we managed to get status pipe check for exec fail */
1885 if (did_pipes && pid > 0) {
1886 int errkid;
1887 int n = 0, n1;
1888
1889 while (n < sizeof(int)) {
1890 n1 = PerlLIO_read(pp[0],
1891 (void*)(((char*)&errkid)+n),
1892 (sizeof(int)) - n);
1893 if (n1 <= 0)
1894 break;
1895 n += n1;
1896 }
1897 PerlLIO_close(pp[0]);
1898 did_pipes = 0;
1899 if (n) { /* Error */
1900 int pid2, status;
1901 if (n != sizeof(int))
1902 Perl_croak(aTHX_ "panic: kid popen errno read");
1903 do {
1904 pid2 = wait4pid(pid, &status, 0);
1905 } while (pid2 == -1 && errno == EINTR);
1906 errno = errkid; /* Propagate errno from kid */
1907 return Nullfp;
1908 }
1909 }
1910 if (did_pipes)
1911 PerlLIO_close(pp[0]);
1912 return PerlIO_fdopen(p[This], mode);
1913#else
4a7d1889
NIS		 1914 Perl_croak(aTHX_ "List form of piped open not implemented");
1915 return (PerlIO *) NULL;
1f852d0d 1916#endif
4a7d1889
NIS		 1917}
1918
5f05dabc 1919 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 1920#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 1921PerlIO *
864dbfa3 1922Perl_my_popen(pTHX_ char *cmd, char *mode)
a687059c
LW		 1923{
1924 int p[2];
8ac85365 1925 register I32 This, that;
d8a83dd3 1926 register Pid_t pid;
79072805 1927 SV *sv;
1738f5c4 1928 I32 doexec = strNE(cmd,"-");
e446cec8
IZ		 1929 I32 did_pipes = 0;
1930 int pp[2];
a687059c 1931
45bc9206 1932 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 1933#ifdef OS2
1934 if (doexec) {
23da6c43 1935 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 1936 }
a1d180c4 1937#endif
8ac85365
NIS		 1938 This = (*mode == 'w');
1939 that = !This;
3280af22 1940 if (doexec && PL_tainting) {
bbce6d69 1941 taint_env();
1942 taint_proper("Insecure %s%s", "EXEC");
d48672a2 1943 }
c2267164
IZ		 1944 if (PerlProc_pipe(p) < 0)
1945 return Nullfp;
e446cec8
IZ		 1946 if (doexec && PerlProc_pipe(pp) >= 0)
1947 did_pipes = 1;
a687059c
LW		 1948 while ((pid = (doexec?vfork():fork())) < 0) {
1949 if (errno != EAGAIN) {
6ad3d225 1950 PerlLIO_close(p[This]);
e446cec8
IZ		 1951 if (did_pipes) {
1952 PerlLIO_close(pp[0]);
1953 PerlLIO_close(pp[1]);
1954 }
a687059c 1955 if (!doexec)
cea2e8a9 1956 Perl_croak(aTHX_ "Can't fork");
a687059c
LW		 1957 return Nullfp;
1958 }
1959 sleep(5);
1960 }
1961 if (pid == 0) {
79072805
LW		 1962 GV* tmpgv;
1963
30ac6d9b
GS		 1964#undef THIS
1965#undef THAT
a687059c 1966#define THIS that
8ac85365 1967#define THAT This
6ad3d225 1968 PerlLIO_close(p[THAT]);
e446cec8
IZ		 1969 if (did_pipes) {
1970 PerlLIO_close(pp[0]);
1971#if defined(HAS_FCNTL) && defined(F_SETFD)
1972 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1973#endif
1974 }
a687059c 1975 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 1976 PerlLIO_dup2(p[THIS], *mode == 'r');
1977 PerlLIO_close(p[THIS]);
a687059c 1978 }
4435c477 1979#ifndef OS2
a687059c 1980 if (doexec) {
a0d0e21e 1981#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 1982 int fd;
1983
1984#ifndef NOFILE
1985#define NOFILE 20
1986#endif
a080fe3d
NIS		 1987 {
1988 int fd;
1989
1990 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
1991 if (fd != pp[1])
1992 PerlLIO_close(fd);
1993 }
ae986130 1994#endif
a080fe3d
NIS		 1995 /* may or may not use the shell */
1996 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 1997 PerlProc__exit(1);
a687059c 1998 }
4435c477 1999#endif /* defined OS2 */
de3bb511 2000 /*SUPPRESS 560*/
155aba94 2001 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV)))
7766f137 2002 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
3280af22
NIS		 2003 PL_forkprocess = 0;
2004 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW		 2005 return Nullfp;
2006#undef THIS
2007#undef THAT
2008 }
62b28dd9 2009 do_execfree(); /* free any memory malloced by child on vfork */
6ad3d225 2010 PerlLIO_close(p[that]);
e446cec8
IZ		 2011 if (did_pipes)
2012 PerlLIO_close(pp[1]);
8ac85365 2013 if (p[that] < p[This]) {
6ad3d225
GS		 2014 PerlLIO_dup2(p[This], p[that]);
2015 PerlLIO_close(p[This]);
8ac85365 2016 p[This] = p[that];
62b28dd9 2017 }
4755096e 2018 LOCK_FDPID_MUTEX;
3280af22 2019 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2020 UNLOCK_FDPID_MUTEX;
a0d0e21e 2021 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2022 SvIVX(sv) = pid;
3280af22 2023 PL_forkprocess = pid;
e446cec8
IZ		 2024 if (did_pipes && pid > 0) {
2025 int errkid;
2026 int n = 0, n1;
2027
2028 while (n < sizeof(int)) {
2029 n1 = PerlLIO_read(pp[0],
2030 (void*)(((char*)&errkid)+n),
2031 (sizeof(int)) - n);
2032 if (n1 <= 0)
2033 break;
2034 n += n1;
2035 }
2f96c702
IZ		 2036 PerlLIO_close(pp[0]);
2037 did_pipes = 0;
e446cec8 2038 if (n) { /* Error */
faa466a7 2039 int pid2, status;
e446cec8 2040 if (n != sizeof(int))
cea2e8a9 2041 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG		 2042 do {
2043 pid2 = wait4pid(pid, &status, 0);
2044 } while (pid2 == -1 && errno == EINTR);
e446cec8
IZ		 2045 errno = errkid; /* Propagate errno from kid */
2046 return Nullfp;
2047 }
2048 }
2049 if (did_pipes)
2050 PerlLIO_close(pp[0]);
8ac85365 2051 return PerlIO_fdopen(p[This], mode);
a687059c 2052}
7c0587c8 2053#else
55497cff 2054#if defined(atarist) || defined(DJGPP)
7c0587c8 2055FILE *popen();
760ac839 2056PerlIO *
864dbfa3 2057Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2058{
45bc9206 2059 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS		 2060 /* Call system's popen() to get a FILE *, then import it.
2061 used 0 for 2nd parameter to PerlIO_importFILE;
2062 apparently not used
2063 */
2064 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8
LW		 2065}
2066#endif
2067
2068#endif /* !DOSISH */
a687059c 2069
748a9306 2070#ifdef DUMP_FDS
35ff7856 2071void
864dbfa3 2072Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2073{
2074 int fd;
2075 struct stat tmpstatbuf;
2076
bf49b057 2077 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2078 for (fd = 0; fd < 32; fd++) {
6ad3d225 2079 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2080 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2081 }
bf49b057 2082 PerlIO_printf(Perl_debug_log,"\n");
ae986130 2083}
35ff7856 2084#endif /* DUMP_FDS */
ae986130 2085
fe14fcc3 2086#ifndef HAS_DUP2
fec02dd3 2087int
ba106d47 2088dup2(int oldfd, int newfd)
a687059c 2089{
a0d0e21e 2090#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2091 if (oldfd == newfd)
2092 return oldfd;
6ad3d225 2093 PerlLIO_close(newfd);
fec02dd3 2094 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2095#else
fc36a67e 2096#define DUP2_MAX_FDS 256
2097 int fdtmp[DUP2_MAX_FDS];
79072805 2098 I32 fdx = 0;
ae986130
LW		 2099 int fd;
2100
fe14fcc3 2101 if (oldfd == newfd)
fec02dd3 2102 return oldfd;
6ad3d225 2103 PerlLIO_close(newfd);
fc36a67e 2104 /* good enough for low fd's... */
6ad3d225 2105 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2106 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2107 PerlLIO_close(fd);
fc36a67e 2108 fd = -1;
2109 break;
2110 }
ae986130 2111 fdtmp[fdx++] = fd;
fc36a67e 2112 }
ae986130 2113 while (fdx > 0)
6ad3d225 2114 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2115 return fd;
62b28dd9 2116#endif
a687059c
LW		 2117}
2118#endif
2119
64ca3a65 2120#ifndef PERL_MICRO
ff68c719 2121#ifdef HAS_SIGACTION
2122
2123Sighandler_t
864dbfa3 2124Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2125{
2126 struct sigaction act, oact;
2127
2128 act.sa_handler = handler;
2129 sigemptyset(&act.sa_mask);
2130 act.sa_flags = 0;
2131#ifdef SA_RESTART
0a8e0eff 2132#if !defined(USE_PERLIO) || defined(PERL_OLD_SIGNALS)
ff68c719 2133 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2134#endif
0a8e0eff 2135#endif
85264bed
CS		 2136#ifdef SA_NOCLDWAIT
2137 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2138 act.sa_flags |= SA_NOCLDWAIT;
2139#endif
ff68c719 2140 if (sigaction(signo, &act, &oact) == -1)
36477c24 2141 return SIG_ERR;
ff68c719 2142 else
36477c24 2143 return oact.sa_handler;
ff68c719 2144}
2145
2146Sighandler_t
864dbfa3 2147Perl_rsignal_state(pTHX_ int signo)
ff68c719 2148{
2149 struct sigaction oact;
2150
2151 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2152 return SIG_ERR;
2153 else
2154 return oact.sa_handler;
2155}
2156
2157int
864dbfa3 2158Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2159{
2160 struct sigaction act;
2161
2162 act.sa_handler = handler;
2163 sigemptyset(&act.sa_mask);
2164 act.sa_flags = 0;
2165#ifdef SA_RESTART
0a8e0eff 2166#if !defined(USE_PERLIO) || defined(PERL_OLD_SIGNALS)
ff68c719 2167 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2168#endif
0a8e0eff 2169#endif
85264bed
CS		 2170#ifdef SA_NOCLDWAIT
2171 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2172 act.sa_flags |= SA_NOCLDWAIT;
2173#endif
ff68c719 2174 return sigaction(signo, &act, save);
2175}
2176
2177int
864dbfa3 2178Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2179{
2180 return sigaction(signo, save, (struct sigaction *)NULL);
2181}
2182
2183#else /* !HAS_SIGACTION */
2184
2185Sighandler_t
864dbfa3 2186Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2187{
6ad3d225 2188 return PerlProc_signal(signo, handler);
ff68c719 2189}
2190
2191static int sig_trapped;
2192
2193static
2194Signal_t
4e35701f 2195sig_trap(int signo)
ff68c719 2196{
2197 sig_trapped++;
2198}
2199
2200Sighandler_t
864dbfa3 2201Perl_rsignal_state(pTHX_ int signo)
ff68c719 2202{
2203 Sighandler_t oldsig;
2204
2205 sig_trapped = 0;
6ad3d225
GS		 2206 oldsig = PerlProc_signal(signo, sig_trap);
2207 PerlProc_signal(signo, oldsig);
ff68c719 2208 if (sig_trapped)
7766f137 2209 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719 2210 return oldsig;
2211}
2212
2213int
864dbfa3 2214Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2215{
6ad3d225 2216 *save = PerlProc_signal(signo, handler);
ff68c719 2217 return (*save == SIG_ERR) ? -1 : 0;
2218}
2219
2220int
864dbfa3 2221Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2222{
6ad3d225 2223 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
ff68c719 2224}
2225
2226#endif /* !HAS_SIGACTION */
64ca3a65 2227#endif /* !PERL_MICRO */
ff68c719 2228
5f05dabc 2229 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2230#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2231I32
864dbfa3 2232Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2233{
ff68c719 2234 Sigsave_t hstat, istat, qstat;
a687059c 2235 int status;
a0d0e21e 2236 SV **svp;
d8a83dd3
JH		 2237 Pid_t pid;
2238 Pid_t pid2;
03136e13 2239 bool close_failed;
b7953727 2240 int saved_errno = 0;
03136e13
CS		 2241#ifdef VMS
2242 int saved_vaxc_errno;
2243#endif
22fae026
TM		 2244#ifdef WIN32
2245 int saved_win32_errno;
2246#endif
a687059c 2247
4755096e 2248 LOCK_FDPID_MUTEX;
3280af22 2249 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2250 UNLOCK_FDPID_MUTEX;
25d92023 2251 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2252 SvREFCNT_dec(*svp);
3280af22 2253 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2254#ifdef OS2
2255 if (pid == -1) { /* Opened by popen. */
2256 return my_syspclose(ptr);
2257 }
a1d180c4 2258#endif
03136e13
CS		 2259 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2260 saved_errno = errno;
2261#ifdef VMS
2262 saved_vaxc_errno = vaxc$errno;
2263#endif
22fae026
TM		 2264#ifdef WIN32
2265 saved_win32_errno = GetLastError();
2266#endif
03136e13 2267 }
7c0587c8 2268#ifdef UTS
6ad3d225 2269 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2270#endif
64ca3a65 2271#ifndef PERL_MICRO
ff68c719 2272 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2273 rsignal_save(SIGINT, SIG_IGN, &istat);
2274 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
64ca3a65 2275#endif
748a9306 2276 do {
1d3434b8
GS		 2277 pid2 = wait4pid(pid, &status, 0);
2278 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2279#ifndef PERL_MICRO
ff68c719 2280 rsignal_restore(SIGHUP, &hstat);
2281 rsignal_restore(SIGINT, &istat);
2282 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2283#endif
03136e13
CS		 2284 if (close_failed) {
2285 SETERRNO(saved_errno, saved_vaxc_errno);
2286 return -1;
2287 }
1d3434b8 2288 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2289}
4633a7c4
LW		 2290#endif /* !DOSISH */
2291
2986a63f 2292#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
79072805 2293I32
d8a83dd3 2294Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2295{
b7953727
JH		 2296 if (!pid)
2297 return -1;
2298#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2299 {
79072805
LW		 2300 SV *sv;
2301 SV** svp;
fc36a67e 2302 char spid[TYPE_CHARS(int)];
20188a90 2303
20188a90 2304 if (pid > 0) {
7b0972df 2305 sprintf(spid, "%"IVdf, (IV)pid);
3280af22
NIS		 2306 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2307 if (svp && *svp != &PL_sv_undef) {
463ee0b2 2308 *statusp = SvIVX(*svp);
3280af22 2309 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2310 return pid;
2311 }
2312 }
2313 else {
79072805 2314 HE *entry;
20188a90 2315
3280af22 2316 hv_iterinit(PL_pidstatus);
155aba94 2317 if ((entry = hv_iternext(PL_pidstatus))) {
a0d0e21e 2318 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3280af22 2319 sv = hv_iterval(PL_pidstatus,entry);
463ee0b2 2320 *statusp = SvIVX(sv);
7b0972df 2321 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2322 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2323 return pid;
2324 }
b7953727 2325 }
20188a90 2326 }
68a29c53 2327#endif
79072805 2328#ifdef HAS_WAITPID
367f3c24
IZ		 2329# ifdef HAS_WAITPID_RUNTIME
2330 if (!HAS_WAITPID_RUNTIME)
2331 goto hard_way;
2332# endif
f55ee38a 2333 return PerlProc_waitpid(pid,statusp,flags);
367f3c24
IZ		 2334#endif
2335#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
a0d0e21e 2336 return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
367f3c24
IZ		 2337#endif
2338#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2339 hard_way:
a0d0e21e
LW		 2340 {
2341 I32 result;
2342 if (flags)
cea2e8a9 2343 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2344 else {
76e3520e 2345 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2346 pidgone(result,*statusp);
2347 if (result < 0)
2348 *statusp = -1;
2349 }
2350 return result;
a687059c
LW		 2351 }
2352#endif
a687059c 2353}
2986a63f 2354#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2355
7c0587c8 2356void
de3bb511 2357/*SUPPRESS 590*/
d8a83dd3 2358Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2359{
79072805 2360 register SV *sv;
fc36a67e 2361 char spid[TYPE_CHARS(int)];
a687059c 2362
7b0972df 2363 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2364 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
a0d0e21e 2365 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2366 SvIVX(sv) = status;
20188a90 2367 return;
a687059c
LW		 2368}
2369
55497cff 2370#if defined(atarist) || defined(OS2) || defined(DJGPP)
7c0587c8 2371int pclose();
ddcf38b7
IZ		 2372#ifdef HAS_FORK
2373int /* Cannot prototype with I32
2374 in os2ish.h. */
ba106d47 2375my_syspclose(PerlIO *ptr)
ddcf38b7 2376#else
79072805 2377I32
864dbfa3 2378Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2379#endif
a687059c 2380{
760ac839
LW		 2381 /* Needs work for PerlIO ! */
2382 FILE *f = PerlIO_findFILE(ptr);
2383 I32 result = pclose(f);
933fea7f
GS		 2384#if defined(DJGPP)
2385 result = (result << 8) & 0xff00;
2386#endif
760ac839
LW		 2387 PerlIO_releaseFILE(ptr,f);
2388 return result;
a687059c 2389}
7c0587c8 2390#endif
9f68db38
LW		 2391
2392void
864dbfa3 2393Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2394{
79072805 2395 register I32 todo;
08105a92 2396 register const char *frombase = from;
9f68db38
LW		 2397
2398 if (len == 1) {
08105a92 2399 register const char c = *from;
9f68db38 2400 while (count-- > 0)
5926133d 2401 *to++ = c;
9f68db38
LW		 2402 return;
2403 }
2404 while (count-- > 0) {
2405 for (todo = len; todo > 0; todo--) {
2406 *to++ = *from++;
2407 }
2408 from = frombase;
2409 }
2410}
0f85fab0 2411
fe14fcc3 2412#ifndef HAS_RENAME
79072805 2413I32
864dbfa3 2414Perl_same_dirent(pTHX_ char *a, char *b)
62b28dd9 2415{
93a17b20
LW		 2416 char *fa = strrchr(a,'/');
2417 char *fb = strrchr(b,'/');
62b28dd9
LW		 2418 struct stat tmpstatbuf1;
2419 struct stat tmpstatbuf2;
46fc3d4c 2420 SV *tmpsv = sv_newmortal();
62b28dd9
LW		 2421
2422 if (fa)
2423 fa++;
2424 else
2425 fa = a;
2426 if (fb)
2427 fb++;
2428 else
2429 fb = b;
2430 if (strNE(a,b))
2431 return FALSE;
2432 if (fa == a)
46fc3d4c 2433 sv_setpv(tmpsv, ".");
62b28dd9 2434 else
46fc3d4c 2435 sv_setpvn(tmpsv, a, fa - a);
c6ed36e1 2436 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 2437 return FALSE;
2438 if (fb == b)
46fc3d4c 2439 sv_setpv(tmpsv, ".");
62b28dd9 2440 else
46fc3d4c 2441 sv_setpvn(tmpsv, b, fb - b);
c6ed36e1 2442 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 2443 return FALSE;
2444 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2445 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2446}
fe14fcc3
LW		 2447#endif /* !HAS_RENAME */
2448
491527d0 2449char*
864dbfa3 2450Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
491527d0 2451{
491527d0
GS		 2452 char *xfound = Nullch;
2453 char *xfailed = Nullch;
0f31cffe 2454 char tmpbuf[MAXPATHLEN];
491527d0
GS		 2455 register char *s;
2456 I32 len;
2457 int retval;
2458#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2459# define SEARCH_EXTS ".bat", ".cmd", NULL
2460# define MAX_EXT_LEN 4
2461#endif
2462#ifdef OS2
2463# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2464# define MAX_EXT_LEN 4
2465#endif
2466#ifdef VMS
2467# define SEARCH_EXTS ".pl", ".com", NULL
2468# define MAX_EXT_LEN 4
2469#endif
2470 /* additional extensions to try in each dir if scriptname not found */
2471#ifdef SEARCH_EXTS
2472 char *exts[] = { SEARCH_EXTS };
2473 char **ext = search_ext ? search_ext : exts;
2474 int extidx = 0, i = 0;
2475 char *curext = Nullch;
2476#else
2477# define MAX_EXT_LEN 0
2478#endif
2479
2480 /*
2481 * If dosearch is true and if scriptname does not contain path
2482 * delimiters, search the PATH for scriptname.
2483 *
2484 * If SEARCH_EXTS is also defined, will look for each
2485 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2486 * while searching the PATH.
2487 *
2488 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2489 * proceeds as follows:
2490 * If DOSISH or VMSISH:
2491 * + look for ./scriptname{,.foo,.bar}
2492 * + search the PATH for scriptname{,.foo,.bar}
2493 *
2494 * If !DOSISH:
2495 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2496 * this will not look in '.' if it's not in the PATH)
2497 */
84486fc6 2498 tmpbuf[0] = '\0';
491527d0
GS		 2499
2500#ifdef VMS
2501# ifdef ALWAYS_DEFTYPES
2502 len = strlen(scriptname);
2503 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2504 int hasdir, idx = 0, deftypes = 1;
2505 bool seen_dot = 1;
2506
2507 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2508# else
2509 if (dosearch) {
2510 int hasdir, idx = 0, deftypes = 1;
2511 bool seen_dot = 1;
2512
2513 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2514# endif
2515 /* The first time through, just add SEARCH_EXTS to whatever we
2516 * already have, so we can check for default file types. */
2517 while (deftypes ||
84486fc6 2518 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 2519 {
2520 if (deftypes) {
2521 deftypes = 0;
84486fc6 2522 *tmpbuf = '\0';
491527d0 2523 }
84486fc6
GS		 2524 if ((strlen(tmpbuf) + strlen(scriptname)
2525 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2526 continue; /* don't search dir with too-long name */
84486fc6 2527 strcat(tmpbuf, scriptname);
491527d0
GS		 2528#else /* !VMS */
2529
2530#ifdef DOSISH
2531 if (strEQ(scriptname, "-"))
2532 dosearch = 0;
2533 if (dosearch) { /* Look in '.' first. */
2534 char *cur = scriptname;
2535#ifdef SEARCH_EXTS
2536 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2537 while (ext[i])
2538 if (strEQ(ext[i++],curext)) {
2539 extidx = -1; /* already has an ext */
2540 break;
2541 }
2542 do {
2543#endif
2544 DEBUG_p(PerlIO_printf(Perl_debug_log,
2545 "Looking for %s\n",cur));
017f25f1
IZ		 2546 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2547 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 2548 dosearch = 0;
2549 scriptname = cur;
2550#ifdef SEARCH_EXTS
2551 break;
2552#endif
2553 }
2554#ifdef SEARCH_EXTS
2555 if (cur == scriptname) {
2556 len = strlen(scriptname);
84486fc6 2557 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2558 break;
84486fc6 2559 cur = strcpy(tmpbuf, scriptname);
491527d0
GS		 2560 }
2561 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2562 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS		 2563#endif
2564 }
2565#endif
2566
cd39f2b6
JH		 2567#ifdef MACOS_TRADITIONAL
2568 if (dosearch && !strchr(scriptname, ':') &&
2569 (s = PerlEnv_getenv("Commands")))
2570#else
491527d0
GS		 2571 if (dosearch && !strchr(scriptname, '/')
2572#ifdef DOSISH
2573 && !strchr(scriptname, '\\')
2574#endif
cd39f2b6
JH		 2575 && (s = PerlEnv_getenv("PATH")))
2576#endif
2577 {
491527d0
GS		 2578 bool seen_dot = 0;
2579
3280af22
NIS		 2580 PL_bufend = s + strlen(s);
2581 while (s < PL_bufend) {
cd39f2b6
JH		 2582#ifdef MACOS_TRADITIONAL
2583 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2584 ',',
2585 &len);
2586#else
491527d0
GS		 2587#if defined(atarist) || defined(DOSISH)
2588 for (len = 0; *s
2589# ifdef atarist
2590 && *s != ','
2591# endif
2592 && *s != ';'; len++, s++) {
84486fc6
GS		 2593 if (len < sizeof tmpbuf)
2594 tmpbuf[len] = *s;
491527d0 2595 }
84486fc6
GS		 2596 if (len < sizeof tmpbuf)
2597 tmpbuf[len] = '\0';
491527d0 2598#else /* ! (atarist || DOSISH) */
3280af22 2599 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 2600 ':',
2601 &len);
2602#endif /* ! (atarist || DOSISH) */
cd39f2b6 2603#endif /* MACOS_TRADITIONAL */
3280af22 2604 if (s < PL_bufend)
491527d0 2605 s++;
84486fc6 2606 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 2607 continue; /* don't search dir with too-long name */
cd39f2b6
JH		 2608#ifdef MACOS_TRADITIONAL
2609 if (len && tmpbuf[len - 1] != ':')
2610 tmpbuf[len++] = ':';
2611#else
491527d0 2612 if (len
61ae2fbf 2613#if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 2614 && tmpbuf[len - 1] != '/'
2615 && tmpbuf[len - 1] != '\\'
491527d0
GS		 2616#endif
2617 )
84486fc6
GS		 2618 tmpbuf[len++] = '/';
2619 if (len == 2 && tmpbuf[0] == '.')
491527d0 2620 seen_dot = 1;
cd39f2b6 2621#endif
84486fc6 2622 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS		 2623#endif /* !VMS */
2624
2625#ifdef SEARCH_EXTS
84486fc6 2626 len = strlen(tmpbuf);
491527d0
GS		 2627 if (extidx > 0) /* reset after previous loop */
2628 extidx = 0;
2629 do {
2630#endif
84486fc6 2631 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 2632 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 2633 if (S_ISDIR(PL_statbuf.st_mode)) {
2634 retval = -1;
2635 }
491527d0
GS		 2636#ifdef SEARCH_EXTS
2637 } while ( retval < 0 /* not there */
2638 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 2639 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS		 2640 );
2641#endif
2642 if (retval < 0)
2643 continue;
3280af22
NIS		 2644 if (S_ISREG(PL_statbuf.st_mode)
2645 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 2646#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 2647 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 2648#endif
2649 )
2650 {
84486fc6 2651 xfound = tmpbuf; /* bingo! */
491527d0
GS		 2652 break;
2653 }
2654 if (!xfailed)
84486fc6 2655 xfailed = savepv(tmpbuf);
491527d0
GS		 2656 }
2657#ifndef DOSISH
017f25f1 2658 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 2659 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 2660 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 2661#endif
2662 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 2663 if (!xfound) {
2664 if (flags & 1) { /* do or die? */
cea2e8a9 2665 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 2666 (xfailed ? "execute" : "find"),
2667 (xfailed ? xfailed : scriptname),
2668 (xfailed ? "" : " on PATH"),
2669 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2670 }
2671 scriptname = Nullch;
2672 }
491527d0
GS		 2673 if (xfailed)
2674 Safefree(xfailed);
2675 scriptname = xfound;
2676 }
9ccb31f9 2677 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS		 2678}
2679
ba869deb
GS		 2680#ifndef PERL_GET_CONTEXT_DEFINED
2681
2682void *
2683Perl_get_context(void)
2684{
2685#if defined(USE_THREADS) || defined(USE_ITHREADS)
2686# ifdef OLD_PTHREADS_API
2687 pthread_addr_t t;
2688 if (pthread_getspecific(PL_thr_key, &t))
2689 Perl_croak_nocontext("panic: pthread_getspecific");
2690 return (void*)t;
2691# else
bce813aa 2692# ifdef I_MACH_CTHREADS
8b8b35ab 2693 return (void*)cthread_data(cthread_self());
bce813aa 2694# else
8b8b35ab
JH		 2695 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
2696# endif
c44d3fdb 2697# endif
ba869deb
GS		 2698#else
2699 return (void*)NULL;
2700#endif
2701}
2702
2703void
2704Perl_set_context(void *t)
2705{
2706#if defined(USE_THREADS) || defined(USE_ITHREADS)
c44d3fdb
GS		 2707# ifdef I_MACH_CTHREADS
2708 cthread_set_data(cthread_self(), t);
2709# else
ba869deb
GS		 2710 if (pthread_setspecific(PL_thr_key, t))
2711 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 2712# endif
ba869deb
GS		 2713#endif
2714}
2715
2716#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 2717
11343788 2718#ifdef USE_THREADS
ba869deb 2719
12ca11f6
MB		 2720#ifdef FAKE_THREADS
2721/* Very simplistic scheduler for now */
2722void
2723schedule(void)
2724{
c7848ba1 2725 thr = thr->i.next_run;
12ca11f6
MB		 2726}
2727
2728void
864dbfa3 2729Perl_cond_init(pTHX_ perl_cond *cp)
12ca11f6
MB		 2730{
2731 *cp = 0;
2732}
2733
2734void
864dbfa3 2735Perl_cond_signal(pTHX_ perl_cond *cp)
12ca11f6 2736{
51dd5992 2737 perl_os_thread t;
12ca11f6 2738 perl_cond cond = *cp;
a1d180c4 2739
12ca11f6
MB		 2740 if (!cond)
2741 return;
2742 t = cond->thread;
2743 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 2744 t->i.next_run = thr->i.next_run;
2745 thr->i.next_run->i.prev_run = t;
2746 t->i.prev_run = thr;
2747 thr->i.next_run = t;
2748 thr->i.wait_queue = 0;
12ca11f6
MB		 2749 /* Remove from the wait queue */
2750 *cp = cond->next;
2751 Safefree(cond);
2752}
2753
2754void
864dbfa3 2755Perl_cond_broadcast(pTHX_ perl_cond *cp)
12ca11f6 2756{
51dd5992 2757 perl_os_thread t;
12ca11f6 2758 perl_cond cond, cond_next;
a1d180c4 2759
12ca11f6
MB		 2760 for (cond = *cp; cond; cond = cond_next) {
2761 t = cond->thread;
2762 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 2763 t->i.next_run = thr->i.next_run;
2764 thr->i.next_run->i.prev_run = t;
2765 t->i.prev_run = thr;
2766 thr->i.next_run = t;
2767 thr->i.wait_queue = 0;
12ca11f6
MB		 2768 /* Remove from the wait queue */
2769 cond_next = cond->next;
2770 Safefree(cond);
2771 }
2772 *cp = 0;
2773}
2774
2775void
864dbfa3 2776Perl_cond_wait(pTHX_ perl_cond *cp)
12ca11f6
MB		 2777{
2778 perl_cond cond;
2779
c7848ba1 2780 if (thr->i.next_run == thr)
cea2e8a9 2781 Perl_croak(aTHX_ "panic: perl_cond_wait called by last runnable thread");
a1d180c4 2782
0f15f207 2783 New(666, cond, 1, struct perl_wait_queue);
12ca11f6
MB		 2784 cond->thread = thr;
2785 cond->next = *cp;
2786 *cp = cond;
c7848ba1 2787 thr->i.wait_queue = cond;
12ca11f6 2788 /* Remove ourselves from runnable queue */
c7848ba1
MB		 2789 thr->i.next_run->i.prev_run = thr->i.prev_run;
2790 thr->i.prev_run->i.next_run = thr->i.next_run;
12ca11f6
MB		 2791}
2792#endif /* FAKE_THREADS */
2793
f93b4edd 2794MAGIC *
864dbfa3 2795Perl_condpair_magic(pTHX_ SV *sv)
f93b4edd
MB		 2796{
2797 MAGIC *mg;
a1d180c4 2798
3e209e71 2799 (void)SvUPGRADE(sv, SVt_PVMG);
14befaf4 2800 mg = mg_find(sv, PERL_MAGIC_mutex);
f93b4edd
MB		 2801 if (!mg) {
2802 condpair_t *cp;
2803
2804 New(53, cp, 1, condpair_t);
2805 MUTEX_INIT(&cp->mutex);
2806 COND_INIT(&cp->owner_cond);
2807 COND_INIT(&cp->cond);
2808 cp->owner = 0;
1feb2720 2809 LOCK_CRED_MUTEX; /* XXX need separate mutex? */
14befaf4 2810 mg = mg_find(sv, PERL_MAGIC_mutex);
f93b4edd
MB		 2811 if (mg) {
2812 /* someone else beat us to initialising it */
1feb2720 2813 UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
f93b4edd
MB		 2814 MUTEX_DESTROY(&cp->mutex);
2815 COND_DESTROY(&cp->owner_cond);
2816 COND_DESTROY(&cp->cond);
2817 Safefree(cp);
2818 }
2819 else {
14befaf4 2820 sv_magic(sv, Nullsv, PERL_MAGIC_mutex, 0, 0);
f93b4edd
MB		 2821 mg = SvMAGIC(sv);
2822 mg->mg_ptr = (char *)cp;
565764a8 2823 mg->mg_len = sizeof(cp);
1feb2720 2824 UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
bf49b057 2825 DEBUG_S(WITH_THR(PerlIO_printf(Perl_debug_log,
c7848ba1 2826 "%p: condpair_magic %p\n", thr, sv));)
f93b4edd
MB		 2827 }
2828 }
2829 return mg;
2830}
a863c7d1 2831
3d35f11b 2832SV *
4755096e 2833Perl_sv_lock(pTHX_ SV *osv)
3d35f11b
GS		 2834{
2835 MAGIC *mg;
2836 SV *sv = osv;
2837
631cfb58 2838 LOCK_SV_LOCK_MUTEX;
3d35f11b
GS		 2839 if (SvROK(sv)) {
2840 sv = SvRV(sv);
3d35f11b
GS		 2841 }
2842
2843 mg = condpair_magic(sv);
2844 MUTEX_LOCK(MgMUTEXP(mg));
2845 if (MgOWNER(mg) == thr)
2846 MUTEX_UNLOCK(MgMUTEXP(mg));
4755096e 2847 else {
3d35f11b
GS		 2848 while (MgOWNER(mg))
2849 COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
2850 MgOWNER(mg) = thr;
4755096e
GS		 2851 DEBUG_S(PerlIO_printf(Perl_debug_log,
2852 "0x%"UVxf": Perl_lock lock 0x%"UVxf"\n",
3d35f11b
GS		 2853 PTR2UV(thr), PTR2UV(sv));)
2854 MUTEX_UNLOCK(MgMUTEXP(mg));
2855 SAVEDESTRUCTOR_X(Perl_unlock_condpair, sv);
2856 }
631cfb58 2857 UNLOCK_SV_LOCK_MUTEX;
4755096e 2858 return sv;
3d35f11b
GS		 2859}
2860
a863c7d1 2861/*
199100c8
MB		 2862 * Make a new perl thread structure using t as a prototype. Some of the
2863 * fields for the new thread are copied from the prototype thread, t,
2864 * so t should not be running in perl at the time this function is
2865 * called. The use by ext/Thread/Thread.xs in core perl (where t is the
2866 * thread calling new_struct_thread) clearly satisfies this constraint.
a863c7d1 2867 */
52e1cb5e 2868struct perl_thread *
864dbfa3 2869Perl_new_struct_thread(pTHX_ struct perl_thread *t)
a863c7d1 2870{
c5be433b 2871#if !defined(PERL_IMPLICIT_CONTEXT)
52e1cb5e 2872 struct perl_thread *thr;
cea2e8a9 2873#endif
a863c7d1 2874 SV *sv;
199100c8
MB		 2875 SV **svp;
2876 I32 i;
2877
79cb57f6 2878 sv = newSVpvn("", 0);
52e1cb5e
JH		 2879 SvGROW(sv, sizeof(struct perl_thread) + 1);
2880 SvCUR_set(sv, sizeof(struct perl_thread));
199100c8 2881 thr = (Thread) SvPVX(sv);
949ced2d 2882#ifdef DEBUGGING
52e1cb5e 2883 memset(thr, 0xab, sizeof(struct perl_thread));
533c011a
NIS		 2884 PL_markstack = 0;
2885 PL_scopestack = 0;
2886 PL_savestack = 0;
2887 PL_retstack = 0;
2888 PL_dirty = 0;
2889 PL_localizing = 0;
949ced2d 2890 Zero(&PL_hv_fetch_ent_mh, 1, HE);
d0e9ca0c
HS		 2891 PL_efloatbuf = (char*)NULL;
2892 PL_efloatsize = 0;
949ced2d
GS		 2893#else
2894 Zero(thr, 1, struct perl_thread);
2895#endif
199100c8
MB		 2896
2897 thr->oursv = sv;
cea2e8a9 2898 init_stacks();
a863c7d1 2899
533c011a 2900 PL_curcop = &PL_compiling;
c5be433b 2901 thr->interp = t->interp;
199100c8 2902 thr->cvcache = newHV();
54b9620d 2903 thr->threadsv = newAV();
a863c7d1 2904 thr->specific = newAV();
79cb57f6 2905 thr->errsv = newSVpvn("", 0);
a863c7d1 2906 thr->flags = THRf_R_JOINABLE;
8dcd6f7b 2907 thr->thr_done = 0;
a863c7d1 2908 MUTEX_INIT(&thr->mutex);
199100c8 2909
5c831c24 2910 JMPENV_BOOTSTRAP;
533c011a 2911
6dc8a9e4 2912 PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR|EVAL_INREQUIRE) */
533c011a
NIS		 2913 PL_restartop = 0;
2914
b099ddc0 2915 PL_statname = NEWSV(66,0);
5a844595 2916 PL_errors = newSVpvn("", 0);
b099ddc0 2917 PL_maxscream = -1;
0b94c7bb
GS		 2918 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
2919 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
2920 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
2921 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
2922 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
b099ddc0
GS		 2923 PL_regindent = 0;
2924 PL_reginterp_cnt = 0;
2925 PL_lastscream = Nullsv;
2926 PL_screamfirst = 0;
2927 PL_screamnext = 0;
2928 PL_reg_start_tmp = 0;
2929 PL_reg_start_tmpl = 0;
14ed4b74 2930 PL_reg_poscache = Nullch;
b099ddc0
GS		 2931
2932 /* parent thread's data needs to be locked while we make copy */
2933 MUTEX_LOCK(&t->mutex);
2934
14dd3ad8 2935#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2936 PL_protect = t->Tprotect;
14dd3ad8 2937#endif
312caa8e 2938
b099ddc0
GS		 2939 PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
2940 PL_defstash = t->Tdefstash; /* XXX maybe these should */
2941 PL_curstash = t->Tcurstash; /* always be set to main? */
2942
6b88bc9c 2943 PL_tainted = t->Ttainted;
84fee439
NIS		 2944 PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
2945 PL_nrs = newSVsv(t->Tnrs);
7d3de3d5 2946 PL_rs = t->Tnrs ? SvREFCNT_inc(PL_nrs) : Nullsv;
84fee439 2947 PL_last_in_gv = Nullgv;
7d3de3d5 2948 PL_ofs_sv = t->Tofs_sv ? SvREFCNT_inc(PL_ofs_sv) : Nullsv;
84fee439
NIS		 2949 PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
2950 PL_chopset = t->Tchopset;
84fee439
NIS		 2951 PL_bodytarget = newSVsv(t->Tbodytarget);
2952 PL_toptarget = newSVsv(t->Ttoptarget);
5c831c24
GS		 2953 if (t->Tformtarget == t->Ttoptarget)
2954 PL_formtarget = PL_toptarget;
2955 else
2956 PL_formtarget = PL_bodytarget;
533c011a 2957
54b9620d
MB		 2958 /* Initialise all per-thread SVs that the template thread used */
2959 svp = AvARRAY(t->threadsv);
93965878 2960 for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
533c011a 2961 if (*svp && *svp != &PL_sv_undef) {
199100c8 2962 SV *sv = newSVsv(*svp);
54b9620d 2963 av_store(thr->threadsv, i, sv);
14befaf4 2964 sv_magic(sv, 0, PERL_MAGIC_sv, &PL_threadsv_names[i], 1);
bf49b057 2965 DEBUG_S(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 2966 "new_struct_thread: copied threadsv %"IVdf" %p->%p\n",
2967 (IV)i, t, thr));
199100c8 2968 }
a1d180c4 2969 }
940cb80d 2970 thr->threadsvp = AvARRAY(thr->threadsv);
199100c8 2971
533c011a
NIS		 2972 MUTEX_LOCK(&PL_threads_mutex);
2973 PL_nthreads++;
2974 thr->tid = ++PL_threadnum;
199100c8
MB		 2975 thr->next = t->next;
2976 thr->prev = t;
2977 t->next = thr;
2978 thr->next->prev = thr;
533c011a 2979 MUTEX_UNLOCK(&PL_threads_mutex);
a863c7d1 2980
b099ddc0
GS		 2981 /* done copying parent's state */
2982 MUTEX_UNLOCK(&t->mutex);
2983
a863c7d1 2984#ifdef HAVE_THREAD_INTERN
4f63d024 2985 Perl_init_thread_intern(thr);
a863c7d1 2986#endif /* HAVE_THREAD_INTERN */
a863c7d1
MB		 2987 return thr;
2988}
11343788 2989#endif /* USE_THREADS */
760ac839 2990
22239a37
NIS		 2991#ifdef PERL_GLOBAL_STRUCT
2992struct perl_vars *
864dbfa3 2993Perl_GetVars(pTHX)
22239a37 2994{
533c011a 2995 return &PL_Vars;
22239a37 2996}
31fb1209
NIS		 2997#endif
2998
2999char **
864dbfa3 3000Perl_get_op_names(pTHX)
31fb1209 3001{
22c35a8c 3002 return PL_op_name;
31fb1209
NIS		 3003}
3004
3005char **
864dbfa3 3006Perl_get_op_descs(pTHX)
31fb1209 3007{
22c35a8c 3008 return PL_op_desc;
31fb1209 3009}
9e6b2b00
GS		 3010
3011char *
864dbfa3 3012Perl_get_no_modify(pTHX)
9e6b2b00 3013{
22c35a8c 3014 return (char*)PL_no_modify;
9e6b2b00
GS		 3015}
3016
3017U32 *
864dbfa3 3018Perl_get_opargs(pTHX)
9e6b2b00 3019{
22c35a8c 3020 return PL_opargs;
9e6b2b00 3021}
51aa15f3 3022
0cb96387
GS		 3023PPADDR_t*
3024Perl_get_ppaddr(pTHX)
3025{
12ae5dfc 3026 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS		 3027}
3028
a6c40364
GS		 3029#ifndef HAS_GETENV_LEN
3030char *
bf4acbe4 3031Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364
GS		 3032{
3033 char *env_trans = PerlEnv_getenv(env_elem);
3034 if (env_trans)
3035 *len = strlen(env_trans);
3036 return env_trans;
f675dbe5
CB		 3037}
3038#endif
3039
dc9e4912
GS		 3040
3041MGVTBL*
864dbfa3 3042Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912
GS		 3043{
3044 MGVTBL* result = Null(MGVTBL*);
3045
3046 switch(vtbl_id) {
3047 case want_vtbl_sv:
3048 result = &PL_vtbl_sv;
3049 break;
3050 case want_vtbl_env:
3051 result = &PL_vtbl_env;
3052 break;
3053 case want_vtbl_envelem:
3054 result = &PL_vtbl_envelem;
3055 break;
3056 case want_vtbl_sig:
3057 result = &PL_vtbl_sig;
3058 break;
3059 case want_vtbl_sigelem:
3060 result = &PL_vtbl_sigelem;
3061 break;
3062 case want_vtbl_pack:
3063 result = &PL_vtbl_pack;
3064 break;
3065 case want_vtbl_packelem:
3066 result = &PL_vtbl_packelem;
3067 break;
3068 case want_vtbl_dbline:
3069 result = &PL_vtbl_dbline;
3070 break;
3071 case want_vtbl_isa:
3072 result = &PL_vtbl_isa;
3073 break;
3074 case want_vtbl_isaelem:
3075 result = &PL_vtbl_isaelem;
3076 break;
3077 case want_vtbl_arylen:
3078 result = &PL_vtbl_arylen;
3079 break;
3080 case want_vtbl_glob:
3081 result = &PL_vtbl_glob;
3082 break;
3083 case want_vtbl_mglob:
3084 result = &PL_vtbl_mglob;
3085 break;
3086 case want_vtbl_nkeys:
3087 result = &PL_vtbl_nkeys;
3088 break;
3089 case want_vtbl_taint:
3090 result = &PL_vtbl_taint;
3091 break;
3092 case want_vtbl_substr:
3093 result = &PL_vtbl_substr;
3094 break;
3095 case want_vtbl_vec:
3096 result = &PL_vtbl_vec;
3097 break;
3098 case want_vtbl_pos:
3099 result = &PL_vtbl_pos;
3100 break;
3101 case want_vtbl_bm:
3102 result = &PL_vtbl_bm;
3103 break;
3104 case want_vtbl_fm:
3105 result = &PL_vtbl_fm;
3106 break;
3107 case want_vtbl_uvar:
3108 result = &PL_vtbl_uvar;
3109 break;
3110#ifdef USE_THREADS
3111 case want_vtbl_mutex:
3112 result = &PL_vtbl_mutex;
3113 break;
3114#endif
3115 case want_vtbl_defelem:
3116 result = &PL_vtbl_defelem;
3117 break;
3118 case want_vtbl_regexp:
3119 result = &PL_vtbl_regexp;
3120 break;
3121 case want_vtbl_regdata:
3122 result = &PL_vtbl_regdata;
3123 break;
3124 case want_vtbl_regdatum:
3125 result = &PL_vtbl_regdatum;
3126 break;
3c90161d 3127#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3128 case want_vtbl_collxfrm:
3129 result = &PL_vtbl_collxfrm;
3130 break;
3c90161d 3131#endif
dc9e4912
GS		 3132 case want_vtbl_amagic:
3133 result = &PL_vtbl_amagic;
3134 break;
3135 case want_vtbl_amagicelem:
3136 result = &PL_vtbl_amagicelem;
3137 break;
810b8aa5
GS		 3138 case want_vtbl_backref:
3139 result = &PL_vtbl_backref;
3140 break;
dc9e4912
GS		 3141 }
3142 return result;
3143}
3144
767df6a1 3145I32
864dbfa3 3146Perl_my_fflush_all(pTHX)
767df6a1 3147{
8fbdfb7c 3148#if defined(FFLUSH_NULL)
ce720889 3149 return PerlIO_flush(NULL);
767df6a1 3150#else
8fbdfb7c 3151# if defined(HAS__FWALK)
74cac757
JH		 3152 /* undocumented, unprototyped, but very useful BSDism */
3153 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3154 _fwalk(&fflush);
74cac757 3155 return 0;
8fa7f367 3156# else
8fbdfb7c 3157# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3158 long open_max = -1;
8fbdfb7c 3159# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3160 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3161# else
8fa7f367 3162# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3163 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH		 3164# else
3165# ifdef FOPEN_MAX
74cac757 3166 open_max = FOPEN_MAX;
8fa7f367
JH		 3167# else
3168# ifdef OPEN_MAX
74cac757 3169 open_max = OPEN_MAX;
8fa7f367
JH		 3170# else
3171# ifdef _NFILE
d2201af2 3172 open_max = _NFILE;
8fa7f367
JH		 3173# endif
3174# endif
74cac757 3175# endif
767df6a1
JH		 3176# endif
3177# endif
767df6a1
JH		 3178 if (open_max > 0) {
3179 long i;
3180 for (i = 0; i < open_max; i++)
d2201af2
AD		 3181 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3182 STDIO_STREAM_ARRAY[i]._file < open_max &&
3183 STDIO_STREAM_ARRAY[i]._flag)
3184 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3185 return 0;
3186 }
8fbdfb7c 3187# endif
767df6a1
JH		 3188 SETERRNO(EBADF,RMS$_IFI);
3189 return EOF;
74cac757 3190# endif
767df6a1
JH		 3191#endif
3192}
097ee67d 3193
69282e91 3194void
bc37a18f
RG		 3195Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op)
3196{
9c0fcd4f 3197 char *vile;
4e34385f 3198 I32 warn_type;
bc37a18f 3199 char *func =
66fc2fa5
JH		 3200 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3201 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
bc37a18f
RG		 3202 PL_op_desc[op];
3203 char *pars = OP_IS_FILETEST(op) ? "" : "()";
21865922
JH		 3204 char *type = OP_IS_SOCKET(op) ||
3205 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
2dd78f96 3206 "socket" : "filehandle";
9c0fcd4f 3207 char *name = NULL;
bc37a18f 3208
21865922 3209 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
9c0fcd4f 3210 vile = "closed";
4e34385f 3211 warn_type = WARN_CLOSED;
2dd78f96
JH		 3212 }
3213 else {
9c0fcd4f 3214 vile = "unopened";
4e34385f 3215 warn_type = WARN_UNOPENED;
9c0fcd4f 3216 }
bc37a18f 3217
66fc2fa5
JH		 3218 if (gv && isGV(gv)) {
3219 SV *sv = sv_newmortal();
3220 gv_efullname4(sv, gv, Nullch, FALSE);
3221 name = SvPVX(sv);
3222 }
3223
4c80c0b2
NC		 3224 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3225 if (name && *name)
3226 Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for %sput",
7889fe52 3227 name,
4c80c0b2
NC		 3228 (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
3229 else
3230 Perl_warner(aTHX_ WARN_IO, "Filehandle opened only for %sput",
3231 (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
3232 } else if (name && *name) {
4e34385f 3233 Perl_warner(aTHX_ warn_type,
9c0fcd4f 3234 "%s%s on %s %s %s", func, pars, vile, type, name);
3e11456d 3235 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
4e34385f 3236 Perl_warner(aTHX_ warn_type,
bc37a18f
RG		 3237 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3238 func, pars, name);
2dd78f96
JH		 3239 }
3240 else {
4e34385f 3241 Perl_warner(aTHX_ warn_type,
9c0fcd4f 3242 "%s%s on %s %s", func, pars, vile, type);
21865922 3243 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
4e34385f 3244 Perl_warner(aTHX_ warn_type,
bc37a18f
RG		 3245 "\t(Are you trying to call %s%s on dirhandle?)\n",
3246 func, pars);
3247 }
69282e91 3248}
a926ef6b
JH		 3249
3250#ifdef EBCDIC
cbebf344
JH		 3251/* in ASCII order, not that it matters */
3252static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3253
a926ef6b
JH		 3254int
3255Perl_ebcdic_control(pTHX_ int ch)
3256{
3257 if (ch > 'a') {
3258 char *ctlp;
4a7d1889 3259
a926ef6b
JH		 3260 if (islower(ch))
3261 ch = toupper(ch);
4a7d1889 3262
a926ef6b
JH		 3263 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3264 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3265 }
4a7d1889 3266
a926ef6b
JH		 3267 if (ctlp == controllablechars)
3268 return('\177'); /* DEL */
3269 else
3270 return((unsigned char)(ctlp - controllablechars - 1));
3271 } else { /* Want uncontrol */
3272 if (ch == '\177' || ch == -1)
3273 return('?');
3274 else if (ch == '\157')
3275 return('\177');
3276 else if (ch == '\174')
3277 return('\000');
3278 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3279 return('\036');
3280 else if (ch == '\155')
3281 return('\037');
3282 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3283 return(controllablechars[ch+1]);
3284 else
3285 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3286 }
3287}
3288#endif
e72cf795 3289
e72cf795
JH		 3290/* XXX struct tm on some systems (SunOS4/BSD) contains extra (non POSIX)
3291 * fields for which we don't have Configure support yet:
3292 * char *tm_zone; -- abbreviation of timezone name
3293 * long tm_gmtoff; -- offset from GMT in seconds
3294 * To workaround core dumps from the uninitialised tm_zone we get the
3295 * system to give us a reasonable struct to copy. This fix means that
3296 * strftime uses the tm_zone and tm_gmtoff values returned by
3297 * localtime(time()). That should give the desired result most of the
3298 * time. But probably not always!
3299 *
3300 * This is a temporary workaround to be removed once Configure
3301 * support is added and NETaa14816 is considered in full.
3302 * It does not address tzname aspects of NETaa14816.
3303 */
3304#ifdef HAS_GNULIBC
3305# ifndef STRUCT_TM_HASZONE
3306# define STRUCT_TM_HASZONE
3307# endif
3308#endif
3309
3310void
f1208910 3311Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795
JH		 3312{
3313#ifdef STRUCT_TM_HASZONE
3314 Time_t now;
3315 (void)time(&now);
3316 Copy(localtime(&now), ptm, 1, struct tm);
3317#endif
3318}
3319
3320/*
3321 * mini_mktime - normalise struct tm values without the localtime()
3322 * semantics (and overhead) of mktime().
3323 */
3324void
f1208910 3325Perl_mini_mktime(pTHX_ struct tm *ptm)
e72cf795
JH		 3326{
3327 int yearday;
3328 int secs;
3329 int month, mday, year, jday;
3330 int odd_cent, odd_year;
3331
3332#define DAYS_PER_YEAR 365
3333#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3334#define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3335#define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3336#define SECS_PER_HOUR (60*60)
3337#define SECS_PER_DAY (24*SECS_PER_HOUR)
3338/* parentheses deliberately absent on these two, otherwise they don't work */
3339#define MONTH_TO_DAYS 153/5
3340#define DAYS_TO_MONTH 5/153
3341/* offset to bias by March (month 4) 1st between month/mday & year finding */
3342#define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3343/* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3344#define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3345
3346/*
3347 * Year/day algorithm notes:
3348 *
3349 * With a suitable offset for numeric value of the month, one can find
3350 * an offset into the year by considering months to have 30.6 (153/5) days,
3351 * using integer arithmetic (i.e., with truncation). To avoid too much
3352 * messing about with leap days, we consider January and February to be
3353 * the 13th and 14th month of the previous year. After that transformation,
3354 * we need the month index we use to be high by 1 from 'normal human' usage,
3355 * so the month index values we use run from 4 through 15.
3356 *
3357 * Given that, and the rules for the Gregorian calendar (leap years are those
3358 * divisible by 4 unless also divisible by 100, when they must be divisible
3359 * by 400 instead), we can simply calculate the number of days since some
3360 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3361 * the days we derive from our month index, and adding in the day of the
3362 * month. The value used here is not adjusted for the actual origin which
3363 * it normally would use (1 January A.D. 1), since we're not exposing it.
3364 * We're only building the value so we can turn around and get the
3365 * normalised values for the year, month, day-of-month, and day-of-year.
3366 *
3367 * For going backward, we need to bias the value we're using so that we find
3368 * the right year value. (Basically, we don't want the contribution of
3369 * March 1st to the number to apply while deriving the year). Having done
3370 * that, we 'count up' the contribution to the year number by accounting for
3371 * full quadracenturies (400-year periods) with their extra leap days, plus
3372 * the contribution from full centuries (to avoid counting in the lost leap
3373 * days), plus the contribution from full quad-years (to count in the normal
3374 * leap days), plus the leftover contribution from any non-leap years.
3375 * At this point, if we were working with an actual leap day, we'll have 0
3376 * days left over. This is also true for March 1st, however. So, we have
3377 * to special-case that result, and (earlier) keep track of the 'odd'
3378 * century and year contributions. If we got 4 extra centuries in a qcent,
3379 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3380 * Otherwise, we add back in the earlier bias we removed (the 123 from
3381 * figuring in March 1st), find the month index (integer division by 30.6),
3382 * and the remainder is the day-of-month. We then have to convert back to
3383 * 'real' months (including fixing January and February from being 14/15 in
3384 * the previous year to being in the proper year). After that, to get
3385 * tm_yday, we work with the normalised year and get a new yearday value for
3386 * January 1st, which we subtract from the yearday value we had earlier,
3387 * representing the date we've re-built. This is done from January 1
3388 * because tm_yday is 0-origin.
3389 *
3390 * Since POSIX time routines are only guaranteed to work for times since the
3391 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3392 * applies Gregorian calendar rules even to dates before the 16th century
3393 * doesn't bother me. Besides, you'd need cultural context for a given
3394 * date to know whether it was Julian or Gregorian calendar, and that's
3395 * outside the scope for this routine. Since we convert back based on the
3396 * same rules we used to build the yearday, you'll only get strange results
3397 * for input which needed normalising, or for the 'odd' century years which
3398 * were leap years in the Julian calander but not in the Gregorian one.
3399 * I can live with that.
3400 *
3401 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3402 * that's still outside the scope for POSIX time manipulation, so I don't
3403 * care.
3404 */
3405
3406 year = 1900 + ptm->tm_year;
3407 month = ptm->tm_mon;
3408 mday = ptm->tm_mday;
3409 /* allow given yday with no month & mday to dominate the result */
3410 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3411 month = 0;
3412 mday = 0;
3413 jday = 1 + ptm->tm_yday;
3414 }
3415 else {
3416 jday = 0;
3417 }
3418 if (month >= 2)
3419 month+=2;
3420 else
3421 month+=14, year--;
3422 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3423 yearday += month*MONTH_TO_DAYS + mday + jday;
3424 /*
3425 * Note that we don't know when leap-seconds were or will be,
3426 * so we have to trust the user if we get something which looks
3427 * like a sensible leap-second. Wild values for seconds will
3428 * be rationalised, however.
3429 */
3430 if ((unsigned) ptm->tm_sec <= 60) {
3431 secs = 0;
3432 }
3433 else {
3434 secs = ptm->tm_sec;
3435 ptm->tm_sec = 0;
3436 }
3437 secs += 60 * ptm->tm_min;
3438 secs += SECS_PER_HOUR * ptm->tm_hour;
3439 if (secs < 0) {
3440 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3441 /* got negative remainder, but need positive time */
3442 /* back off an extra day to compensate */
3443 yearday += (secs/SECS_PER_DAY)-1;
3444 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3445 }
3446 else {
3447 yearday += (secs/SECS_PER_DAY);
3448 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3449 }
3450 }
3451 else if (secs >= SECS_PER_DAY) {
3452 yearday += (secs/SECS_PER_DAY);
3453 secs %= SECS_PER_DAY;
3454 }
3455 ptm->tm_hour = secs/SECS_PER_HOUR;
3456 secs %= SECS_PER_HOUR;
3457 ptm->tm_min = secs/60;
3458 secs %= 60;
3459 ptm->tm_sec += secs;
3460 /* done with time of day effects */
3461 /*
3462 * The algorithm for yearday has (so far) left it high by 428.
3463 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3464 * bias it by 123 while trying to figure out what year it
3465 * really represents. Even with this tweak, the reverse
3466 * translation fails for years before A.D. 0001.
3467 * It would still fail for Feb 29, but we catch that one below.
3468 */
3469 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3470 yearday -= YEAR_ADJUST;
3471 year = (yearday / DAYS_PER_QCENT) * 400;
3472 yearday %= DAYS_PER_QCENT;
3473 odd_cent = yearday / DAYS_PER_CENT;
3474 year += odd_cent * 100;
3475 yearday %= DAYS_PER_CENT;
3476 year += (yearday / DAYS_PER_QYEAR) * 4;
3477 yearday %= DAYS_PER_QYEAR;
3478 odd_year = yearday / DAYS_PER_YEAR;
3479 year += odd_year;
3480 yearday %= DAYS_PER_YEAR;
3481 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3482 month = 1;
3483 yearday = 29;
3484 }
3485 else {
3486 yearday += YEAR_ADJUST; /* recover March 1st crock */
3487 month = yearday*DAYS_TO_MONTH;
3488 yearday -= month*MONTH_TO_DAYS;
3489 /* recover other leap-year adjustment */
3490 if (month > 13) {
3491 month-=14;
3492 year++;
3493 }
3494 else {
3495 month-=2;
3496 }
3497 }
3498 ptm->tm_year = year - 1900;
3499 if (yearday) {
3500 ptm->tm_mday = yearday;
3501 ptm->tm_mon = month;
3502 }
3503 else {
3504 ptm->tm_mday = 31;
3505 ptm->tm_mon = month - 1;
3506 }
3507 /* re-build yearday based on Jan 1 to get tm_yday */
3508 year--;
3509 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3510 yearday += 14*MONTH_TO_DAYS + 1;
3511 ptm->tm_yday = jday - yearday;
3512 /* fix tm_wday if not overridden by caller */
3513 if ((unsigned)ptm->tm_wday > 6)
3514 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3515}
b3c85772
JH		 3516
3517char *
f1208910 3518Perl_my_strftime(pTHX_ char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
b3c85772
JH		 3519{
3520#ifdef HAS_STRFTIME
3521 char *buf;
3522 int buflen;
3523 struct tm mytm;
3524 int len;
3525
3526 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3527 mytm.tm_sec = sec;
3528 mytm.tm_min = min;
3529 mytm.tm_hour = hour;
3530 mytm.tm_mday = mday;
3531 mytm.tm_mon = mon;
3532 mytm.tm_year = year;
3533 mytm.tm_wday = wday;
3534 mytm.tm_yday = yday;
3535 mytm.tm_isdst = isdst;
3536 mini_mktime(&mytm);
3537 buflen = 64;
3538 New(0, buf, buflen, char);
3539 len = strftime(buf, buflen, fmt, &mytm);
3540 /*
877f6a72 3541 ** The following is needed to handle to the situation where
b3c85772
JH		 3542 ** tmpbuf overflows. Basically we want to allocate a buffer
3543 ** and try repeatedly. The reason why it is so complicated
3544 ** is that getting a return value of 0 from strftime can indicate
3545 ** one of the following:
3546 ** 1. buffer overflowed,
3547 ** 2. illegal conversion specifier, or
3548 ** 3. the format string specifies nothing to be returned(not
3549 ** an error). This could be because format is an empty string
3550 ** or it specifies %p that yields an empty string in some locale.
3551 ** If there is a better way to make it portable, go ahead by
3552 ** all means.
3553 */
3554 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3555 return buf;
3556 else {
3557 /* Possibly buf overflowed - try again with a bigger buf */
3558 int fmtlen = strlen(fmt);
3559 int bufsize = fmtlen + buflen;
877f6a72 3560
b3c85772
JH		 3561 New(0, buf, bufsize, char);
3562 while (buf) {
3563 buflen = strftime(buf, bufsize, fmt, &mytm);
3564 if (buflen > 0 && buflen < bufsize)
3565 break;
3566 /* heuristic to prevent out-of-memory errors */
3567 if (bufsize > 100*fmtlen) {
3568 Safefree(buf);
3569 buf = NULL;
3570 break;
3571 }
3572 bufsize *= 2;
3573 Renew(buf, bufsize, char);
3574 }
3575 return buf;
3576 }
3577#else
3578 Perl_croak(aTHX_ "panic: no strftime");
3579#endif
3580}
3581
877f6a72
NIS		 3582
3583#define SV_CWD_RETURN_UNDEF \
3584sv_setsv(sv, &PL_sv_undef); \
3585return FALSE
3586
3587#define SV_CWD_ISDOT(dp) \
3588 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3589 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
3590
3591/*
3592=for apidoc sv_getcwd
3593
3594Fill the sv with current working directory
3595
3596=cut
3597*/
3598
3599/* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3600 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3601 * getcwd(3) if available
3602 * Comments from the orignal:
3603 * This is a faster version of getcwd. It's also more dangerous
3604 * because you might chdir out of a directory that you can't chdir
3605 * back into. */
3606
877f6a72
NIS		 3607int
3608Perl_sv_getcwd(pTHX_ register SV *sv)
3609{
3610#ifndef PERL_MICRO
3611
8f95b30d
JH		 3612#ifdef HAS_GETCWD
3613 {
60e110a8
DM		 3614 char buf[MAXPATHLEN];
3615
3616 /* Some getcwd()s automatically allocate a buffer of the given
3617 * size from the heap if they are given a NULL buffer pointer.
3618 * The problem is that this behaviour is not portable. */
3619 if (getcwd(buf, sizeof(buf) - 1)) {
3620 STRLEN len = strlen(buf);
3621 sv_setpvn(sv, buf, len);
3622 return TRUE;
3623 }
3624 else {
3625 sv_setsv(sv, &PL_sv_undef);
3626 return FALSE;
3627 }
8f95b30d
JH		 3628 }
3629
3630#else
3631
877f6a72
NIS		 3632 struct stat statbuf;
3633 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
3634 int namelen, pathlen=0;
3635 DIR *dir;
3636 Direntry_t *dp;
877f6a72
NIS		 3637
3638 (void)SvUPGRADE(sv, SVt_PV);
3639
877f6a72 3640 if (PerlLIO_lstat(".", &statbuf) < 0) {
a87ab2eb 3641 SV_CWD_RETURN_UNDEF;
877f6a72
NIS		 3642 }
3643
3644 orig_cdev = statbuf.st_dev;
3645 orig_cino = statbuf.st_ino;
3646 cdev = orig_cdev;
3647 cino = orig_cino;
3648
3649 for (;;) {
3650 odev = cdev;
3651 oino = cino;
3652
3653 if (PerlDir_chdir("..") < 0) {
3654 SV_CWD_RETURN_UNDEF;
3655 }
3656 if (PerlLIO_stat(".", &statbuf) < 0) {
3657 SV_CWD_RETURN_UNDEF;
3658 }
3659
3660 cdev = statbuf.st_dev;
3661 cino = statbuf.st_ino;
3662
3663 if (odev == cdev && oino == cino) {
3664 break;
3665 }
3666 if (!(dir = PerlDir_open("."))) {
3667 SV_CWD_RETURN_UNDEF;
3668 }
3669
3670 while ((dp = PerlDir_read(dir)) != NULL) {
3671#ifdef DIRNAMLEN
3672 namelen = dp->d_namlen;
3673#else
3674 namelen = strlen(dp->d_name);
3675#endif
3676 /* skip . and .. */
a87ab2eb 3677 if (SV_CWD_ISDOT(dp)) {
877f6a72
NIS		 3678 continue;
3679 }
3680
3681 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
3682 SV_CWD_RETURN_UNDEF;
3683 }
3684
3685 tdev = statbuf.st_dev;
3686 tino = statbuf.st_ino;
3687 if (tino == oino && tdev == odev) {
3688 break;
3689 }
3690 }
3691
3692 if (!dp) {
3693 SV_CWD_RETURN_UNDEF;
3694 }
3695
cb5953d6
JH