3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
13 * not content." --Gandalf
16 /* This file contains assorted utility routines.
17 * Which is a polite way of saying any stuff that people couldn't think of
18 * a better place for. Amongst other things, it includes the warning and
19 * dieing stuff, plus wrappers for malloc code.
23 #define PERL_IN_UTIL_C
29 # define SIG_ERR ((Sighandler_t) -1)
34 /* Missing protos on LynxOS */
39 # include <sys/wait.h>
44 # include <sys/select.h>
50 #if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
51 # define FD_CLOEXEC 1 /* NeXT needs this */
54 /* NOTE: Do not call the next three routines directly. Use the macros
55 * in handy.h, so that we can easily redefine everything to do tracking of
56 * allocated hunks back to the original New to track down any memory leaks.
57 * XXX This advice seems to be widely ignored :-( --AD August 1996.
64 /* Can't use PerlIO to write as it allocates memory */
65 PerlLIO_write(PerlIO_fileno(Perl_error_log),
66 PL_no_mem, strlen(PL_no_mem));
68 NORETURN_FUNCTION_END;
71 /* paranoid version of system's malloc() */
74 Perl_safesysmalloc(MEM_SIZE size)
80 PerlIO_printf(Perl_error_log,
81 "Allocation too large: %lx\n", size) FLUSH;
84 #endif /* HAS_64K_LIMIT */
85 #ifdef PERL_TRACK_MEMPOOL
90 Perl_croak_nocontext("panic: malloc");
92 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
93 PERL_ALLOC_CHECK(ptr);
94 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
96 #ifdef PERL_TRACK_MEMPOOL
97 struct perl_memory_debug_header *const header
98 = (struct perl_memory_debug_header *)ptr;
102 PoisonNew(((char *)ptr), size, char);
105 #ifdef PERL_TRACK_MEMPOOL
106 header->interpreter = aTHX;
107 /* Link us into the list. */
108 header->prev = &PL_memory_debug_header;
109 header->next = PL_memory_debug_header.next;
110 PL_memory_debug_header.next = header;
111 header->next->prev = header;
115 ptr = (Malloc_t)((char*)ptr+sTHX);
122 return write_no_mem();
127 /* paranoid version of system's realloc() */
130 Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
134 #if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
135 Malloc_t PerlMem_realloc();
136 #endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
140 PerlIO_printf(Perl_error_log,
141 "Reallocation too large: %lx\n", size) FLUSH;
144 #endif /* HAS_64K_LIMIT */
151 return safesysmalloc(size);
152 #ifdef PERL_TRACK_MEMPOOL
153 where = (Malloc_t)((char*)where-sTHX);
156 struct perl_memory_debug_header *const header
157 = (struct perl_memory_debug_header *)where;
159 if (header->interpreter != aTHX) {
160 Perl_croak_nocontext("panic: realloc from wrong pool");
162 assert(header->next->prev == header);
163 assert(header->prev->next == header);
165 if (header->size > size) {
166 const MEM_SIZE freed_up = header->size - size;
167 char *start_of_freed = ((char *)where) + size;
168 PoisonFree(start_of_freed, freed_up, char);
176 Perl_croak_nocontext("panic: realloc");
178 ptr = (Malloc_t)PerlMem_realloc(where,size);
179 PERL_ALLOC_CHECK(ptr);
181 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
182 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
185 #ifdef PERL_TRACK_MEMPOOL
186 struct perl_memory_debug_header *const header
187 = (struct perl_memory_debug_header *)ptr;
190 if (header->size < size) {
191 const MEM_SIZE fresh = size - header->size;
192 char *start_of_fresh = ((char *)ptr) + size;
193 PoisonNew(start_of_fresh, fresh, char);
197 header->next->prev = header;
198 header->prev->next = header;
200 ptr = (Malloc_t)((char*)ptr+sTHX);
207 return write_no_mem();
212 /* safe version of system's free() */
215 Perl_safesysfree(Malloc_t where)
217 #if defined(PERL_IMPLICIT_SYS) || defined(PERL_TRACK_MEMPOOL)
222 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
224 #ifdef PERL_TRACK_MEMPOOL
225 where = (Malloc_t)((char*)where-sTHX);
227 struct perl_memory_debug_header *const header
228 = (struct perl_memory_debug_header *)where;
230 if (header->interpreter != aTHX) {
231 Perl_croak_nocontext("panic: free from wrong pool");
234 Perl_croak_nocontext("panic: duplicate free");
236 if (!(header->next) || header->next->prev != header
237 || header->prev->next != header) {
238 Perl_croak_nocontext("panic: bad free");
240 /* Unlink us from the chain. */
241 header->next->prev = header->prev;
242 header->prev->next = header->next;
244 PoisonNew(where, header->size, char);
246 /* Trigger the duplicate free warning. */
254 /* safe version of system's calloc() */
257 Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
263 if (size * count > 0xffff) {
264 PerlIO_printf(Perl_error_log,
265 "Allocation too large: %lx\n", size * count) FLUSH;
268 #endif /* HAS_64K_LIMIT */
270 if ((long)size < 0 || (long)count < 0)
271 Perl_croak_nocontext("panic: calloc");
274 #ifdef PERL_TRACK_MEMPOOL
277 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
278 PERL_ALLOC_CHECK(ptr);
279 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));
281 memset((void*)ptr, 0, size);
282 #ifdef PERL_TRACK_MEMPOOL
284 struct perl_memory_debug_header *const header
285 = (struct perl_memory_debug_header *)ptr;
287 header->interpreter = aTHX;
288 /* Link us into the list. */
289 header->prev = &PL_memory_debug_header;
290 header->next = PL_memory_debug_header.next;
291 PL_memory_debug_header.next = header;
292 header->next->prev = header;
296 ptr = (Malloc_t)((char*)ptr+sTHX);
303 return write_no_mem();
306 /* These must be defined when not using Perl's malloc for binary
311 Malloc_t Perl_malloc (MEM_SIZE nbytes)
314 return (Malloc_t)PerlMem_malloc(nbytes);
317 Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
320 return (Malloc_t)PerlMem_calloc(elements, size);
323 Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
326 return (Malloc_t)PerlMem_realloc(where, nbytes);
329 Free_t Perl_mfree (Malloc_t where)
337 /* copy a string up to some (non-backslashed) delimiter, if any */
340 Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
345 for (tolen = 0; from < fromend; from++, tolen++) {
347 if (from[1] != delim) {
354 else if (*from == delim)
365 /* return ptr to little string in big string, NULL if not found */
366 /* This routine was donated by Corey Satten. */
369 Perl_instr(pTHX_ register const char *big, register const char *little)
380 register const char *s, *x;
383 for (x=big,s=little; *s; /**/ ) {
394 return (char*)(big-1);
399 /* same as instr but allow embedded nulls */
402 Perl_ninstr(pTHX_ const char *big, const char *bigend, const char *little, const char *lend)
408 char first = *little++;
410 bigend -= lend - little;
412 while (big <= bigend) {
415 for (x=big,s=little; s < lend; x++,s++) {
419 return (char*)(big-1);
425 /* reverse of the above--find last substring */
428 Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
430 register const char *bigbeg;
431 register const I32 first = *little;
432 register const char * const littleend = lend;
435 if (little >= littleend)
436 return (char*)bigend;
438 big = bigend - (littleend - little++);
439 while (big >= bigbeg) {
440 register const char *s, *x;
443 for (x=big+2,s=little; s < littleend; /**/ ) {
452 return (char*)(big+1);
457 #define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
459 /* As a space optimization, we do not compile tables for strings of length
460 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
461 special-cased in fbm_instr().
463 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
466 =head1 Miscellaneous Functions
468 =for apidoc fbm_compile
470 Analyses the string in order to make fast searches on it using fbm_instr()
471 -- the Boyer-Moore algorithm.
477 Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
480 register const U8 *s;
486 if (flags & FBMcf_TAIL) {
487 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
488 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
489 if (mg && mg->mg_len >= 0)
492 s = (U8*)SvPV_force_mutable(sv, len);
493 SvUPGRADE(sv, SVt_PVBM);
494 if (len == 0) /* TAIL might be on a zero-length string. */
497 const unsigned char *sb;
498 const U8 mlen = (len>255) ? 255 : (U8)len;
501 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
502 table = (unsigned char*)(SvPVX_mutable(sv) + len + FBM_TABLE_OFFSET);
503 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
504 memset((void*)table, mlen, 256);
505 table[-1] = (U8)flags;
507 sb = s - mlen + 1; /* first char (maybe) */
509 if (table[*s] == mlen)
514 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
517 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
518 for (i = 0; i < len; i++) {
519 if (PL_freq[s[i]] < frequency) {
521 frequency = PL_freq[s[i]];
524 BmRARE(sv) = s[rarest];
525 BmPREVIOUS(sv) = (U16)rarest;
526 BmUSEFUL(sv) = 100; /* Initial value */
527 if (flags & FBMcf_TAIL)
529 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
530 BmRARE(sv),BmPREVIOUS(sv)));
533 /* If SvTAIL(littlestr), it has a fake '\n' at end. */
534 /* If SvTAIL is actually due to \Z or \z, this gives false positives
538 =for apidoc fbm_instr
540 Returns the location of the SV in the string delimited by C<str> and
541 C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
542 does not have to be fbm_compiled, but the search will not be as fast
549 Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
551 register unsigned char *s;
553 register const unsigned char *little
554 = (const unsigned char *)SvPV_const(littlestr,l);
555 register STRLEN littlelen = l;
556 register const I32 multiline = flags & FBMrf_MULTILINE;
558 if ((STRLEN)(bigend - big) < littlelen) {
559 if ( SvTAIL(littlestr)
560 && ((STRLEN)(bigend - big) == littlelen - 1)
562 || (*big == *little &&
563 memEQ((char *)big, (char *)little, littlelen - 1))))
568 if (littlelen <= 2) { /* Special-cased */
570 if (littlelen == 1) {
571 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
572 /* Know that bigend != big. */
573 if (bigend[-1] == '\n')
574 return (char *)(bigend - 1);
575 return (char *) bigend;
583 if (SvTAIL(littlestr))
584 return (char *) bigend;
588 return (char*)big; /* Cannot be SvTAIL! */
591 if (SvTAIL(littlestr) && !multiline) {
592 if (bigend[-1] == '\n' && bigend[-2] == *little)
593 return (char*)bigend - 2;
594 if (bigend[-1] == *little)
595 return (char*)bigend - 1;
599 /* This should be better than FBM if c1 == c2, and almost
600 as good otherwise: maybe better since we do less indirection.
601 And we save a lot of memory by caching no table. */
602 const unsigned char c1 = little[0];
603 const unsigned char c2 = little[1];
608 while (s <= bigend) {
618 goto check_1char_anchor;
629 goto check_1char_anchor;
632 while (s <= bigend) {
637 goto check_1char_anchor;
646 check_1char_anchor: /* One char and anchor! */
647 if (SvTAIL(littlestr) && (*bigend == *little))
648 return (char *)bigend; /* bigend is already decremented. */
651 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
652 s = bigend - littlelen;
653 if (s >= big && bigend[-1] == '\n' && *s == *little
654 /* Automatically of length > 2 */
655 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
657 return (char*)s; /* how sweet it is */
660 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
662 return (char*)s + 1; /* how sweet it is */
666 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
667 char * const b = ninstr((char*)big,(char*)bigend,
668 (char*)little, (char*)little + littlelen);
670 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
671 /* Chop \n from littlestr: */
672 s = bigend - littlelen + 1;
674 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
683 { /* Do actual FBM. */
684 register const unsigned char * const table = little + littlelen + FBM_TABLE_OFFSET;
685 register const unsigned char *oldlittle;
687 if (littlelen > (STRLEN)(bigend - big))
689 --littlelen; /* Last char found by table lookup */
692 little += littlelen; /* last char */
698 if ((tmp = table[*s])) {
699 if ((s += tmp) < bigend)
703 else { /* less expensive than calling strncmp() */
704 register unsigned char * const olds = s;
709 if (*--s == *--little)
711 s = olds + 1; /* here we pay the price for failure */
713 if (s < bigend) /* fake up continue to outer loop */
721 if ( s == bigend && (table[-1] & FBMcf_TAIL)
722 && memEQ((char *)(bigend - littlelen),
723 (char *)(oldlittle - littlelen), littlelen) )
724 return (char*)bigend - littlelen;
729 /* start_shift, end_shift are positive quantities which give offsets
730 of ends of some substring of bigstr.
731 If "last" we want the last occurrence.
732 old_posp is the way of communication between consequent calls if
733 the next call needs to find the .
734 The initial *old_posp should be -1.
736 Note that we take into account SvTAIL, so one can get extra
737 optimizations if _ALL flag is set.
740 /* If SvTAIL is actually due to \Z or \z, this gives false positives
741 if PL_multiline. In fact if !PL_multiline the authoritative answer
742 is not supported yet. */
745 Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
748 register const unsigned char *big;
750 register I32 previous;
752 register const unsigned char *little;
753 register I32 stop_pos;
754 register const unsigned char *littleend;
758 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
759 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
761 if ( BmRARE(littlestr) == '\n'
762 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
763 little = (const unsigned char *)(SvPVX_const(littlestr));
764 littleend = little + SvCUR(littlestr);
771 little = (const unsigned char *)(SvPVX_const(littlestr));
772 littleend = little + SvCUR(littlestr);
774 /* The value of pos we can start at: */
775 previous = BmPREVIOUS(littlestr);
776 big = (const unsigned char *)(SvPVX_const(bigstr));
777 /* The value of pos we can stop at: */
778 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
779 if (previous + start_shift > stop_pos) {
781 stop_pos does not include SvTAIL in the count, so this check is incorrect
782 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
785 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
790 while (pos < previous + start_shift) {
791 if (!(pos += PL_screamnext[pos]))
796 register const unsigned char *s, *x;
797 if (pos >= stop_pos) break;
798 if (big[pos] != first)
800 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
806 if (s == littleend) {
808 if (!last) return (char *)(big+pos);
811 } while ( pos += PL_screamnext[pos] );
813 return (char *)(big+(*old_posp));
815 if (!SvTAIL(littlestr) || (end_shift > 0))
817 /* Ignore the trailing "\n". This code is not microoptimized */
818 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
819 stop_pos = littleend - little; /* Actual littlestr len */
824 && ((stop_pos == 1) ||
825 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
831 Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
833 register const U8 *a = (const U8 *)s1;
834 register const U8 *b = (const U8 *)s2;
838 if (*a != *b && *a != PL_fold[*b])
846 Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
849 register const U8 *a = (const U8 *)s1;
850 register const U8 *b = (const U8 *)s2;
854 if (*a != *b && *a != PL_fold_locale[*b])
861 /* copy a string to a safe spot */
864 =head1 Memory Management
868 Perl's version of C<strdup()>. Returns a pointer to a newly allocated
869 string which is a duplicate of C<pv>. The size of the string is
870 determined by C<strlen()>. The memory allocated for the new string can
871 be freed with the C<Safefree()> function.
877 Perl_savepv(pTHX_ const char *pv)
884 const STRLEN pvlen = strlen(pv)+1;
885 Newx(newaddr, pvlen, char);
886 return (char*)memcpy(newaddr, pv, pvlen);
890 /* same thing but with a known length */
895 Perl's version of what C<strndup()> would be if it existed. Returns a
896 pointer to a newly allocated string which is a duplicate of the first
897 C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
898 the new string can be freed with the C<Safefree()> function.
904 Perl_savepvn(pTHX_ const char *pv, register I32 len)
906 register char *newaddr;
909 Newx(newaddr,len+1,char);
910 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
912 /* might not be null terminated */
914 return (char *) CopyD(pv,newaddr,len,char);
917 return (char *) ZeroD(newaddr,len+1,char);
922 =for apidoc savesharedpv
924 A version of C<savepv()> which allocates the duplicate string in memory
925 which is shared between threads.
930 Perl_savesharedpv(pTHX_ const char *pv)
932 register char *newaddr;
937 pvlen = strlen(pv)+1;
938 newaddr = (char*)PerlMemShared_malloc(pvlen);
940 return write_no_mem();
942 return (char*)memcpy(newaddr, pv, pvlen);
948 A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
949 the passed in SV using C<SvPV()>
955 Perl_savesvpv(pTHX_ SV *sv)
958 const char * const pv = SvPV_const(sv, len);
959 register char *newaddr;
962 Newx(newaddr,len,char);
963 return (char *) CopyD(pv,newaddr,len,char);
967 /* the SV for Perl_form() and mess() is not kept in an arena */
977 return sv_2mortal(newSVpvs(""));
982 /* Create as PVMG now, to avoid any upgrading later */
984 Newxz(any, 1, XPVMG);
985 SvFLAGS(sv) = SVt_PVMG;
986 SvANY(sv) = (void*)any;
988 SvREFCNT(sv) = 1 << 30; /* practically infinite */
993 #if defined(PERL_IMPLICIT_CONTEXT)
995 Perl_form_nocontext(const char* pat, ...)
1000 va_start(args, pat);
1001 retval = vform(pat, &args);
1005 #endif /* PERL_IMPLICIT_CONTEXT */
1008 =head1 Miscellaneous Functions
1011 Takes a sprintf-style format pattern and conventional
1012 (non-SV) arguments and returns the formatted string.
1014 (char *) Perl_form(pTHX_ const char* pat, ...)
1016 can be used any place a string (char *) is required:
1018 char * s = Perl_form("%d.%d",major,minor);
1020 Uses a single private buffer so if you want to format several strings you
1021 must explicitly copy the earlier strings away (and free the copies when you
1028 Perl_form(pTHX_ const char* pat, ...)
1032 va_start(args, pat);
1033 retval = vform(pat, &args);
1039 Perl_vform(pTHX_ const char *pat, va_list *args)
1041 SV * const sv = mess_alloc();
1042 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1046 #if defined(PERL_IMPLICIT_CONTEXT)
1048 Perl_mess_nocontext(const char *pat, ...)
1053 va_start(args, pat);
1054 retval = vmess(pat, &args);
1058 #endif /* PERL_IMPLICIT_CONTEXT */
1061 Perl_mess(pTHX_ const char *pat, ...)
1065 va_start(args, pat);
1066 retval = vmess(pat, &args);
1072 S_closest_cop(pTHX_ const COP *cop, const OP *o)
1075 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1077 if (!o || o == PL_op)
1080 if (o->op_flags & OPf_KIDS) {
1082 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1085 /* If the OP_NEXTSTATE has been optimised away we can still use it
1086 * the get the file and line number. */
1088 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
1089 cop = (const COP *)kid;
1091 /* Keep searching, and return when we've found something. */
1093 new_cop = closest_cop(cop, kid);
1099 /* Nothing found. */
1105 Perl_vmess(pTHX_ const char *pat, va_list *args)
1108 SV * const sv = mess_alloc();
1110 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1111 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
1113 * Try and find the file and line for PL_op. This will usually be
1114 * PL_curcop, but it might be a cop that has been optimised away. We
1115 * can try to find such a cop by searching through the optree starting
1116 * from the sibling of PL_curcop.
1119 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
1124 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
1125 OutCopFILE(cop), (IV)CopLINE(cop));
1126 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
1127 const bool line_mode = (RsSIMPLE(PL_rs) &&
1128 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
1129 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
1130 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
1131 line_mode ? "line" : "chunk",
1132 (IV)IoLINES(GvIOp(PL_last_in_gv)));
1135 sv_catpvs(sv, " during global destruction");
1136 sv_catpvs(sv, ".\n");
1142 Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1148 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1149 && (io = GvIO(PL_stderrgv))
1150 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
1157 SAVESPTR(PL_stderrgv);
1160 PUSHSTACKi(PERLSI_MAGIC);
1164 PUSHs(SvTIED_obj((SV*)io, mg));
1165 PUSHs(sv_2mortal(newSVpvn(message, msglen)));
1167 call_method("PRINT", G_SCALAR);
1175 /* SFIO can really mess with your errno */
1176 const int e = errno;
1178 PerlIO * const serr = Perl_error_log;
1180 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1181 (void)PerlIO_flush(serr);
1188 /* Common code used by vcroak, vdie, vwarn and vwarner */
1191 S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
1197 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1198 /* sv_2cv might call Perl_croak() or Perl_warner() */
1199 SV * const oldhook = *hook;
1206 cv = sv_2cv(oldhook, &stash, &gv, 0);
1208 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1218 if (warn || message) {
1219 msg = newSVpvn(message, msglen);
1220 SvFLAGS(msg) |= utf8;
1228 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
1232 call_sv((SV*)cv, G_DISCARD);
1241 S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1245 const char *message;
1248 SV * const msv = vmess(pat, args);
1249 if (PL_errors && SvCUR(PL_errors)) {
1250 sv_catsv(PL_errors, msv);
1251 message = SvPV_const(PL_errors, *msglen);
1252 SvCUR_set(PL_errors, 0);
1255 message = SvPV_const(msv,*msglen);
1256 *utf8 = SvUTF8(msv);
1262 DEBUG_S(PerlIO_printf(Perl_debug_log,
1263 "%p: die/croak: message = %s\ndiehook = %p\n",
1264 thr, message, PL_diehook));
1266 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
1272 Perl_vdie(pTHX_ const char* pat, va_list *args)
1275 const char *message;
1276 const int was_in_eval = PL_in_eval;
1280 DEBUG_S(PerlIO_printf(Perl_debug_log,
1281 "%p: die: curstack = %p, mainstack = %p\n",
1282 thr, PL_curstack, PL_mainstack));
1284 message = vdie_croak_common(pat, args, &msglen, &utf8);
1286 PL_restartop = die_where(message, msglen);
1287 SvFLAGS(ERRSV) |= utf8;
1288 DEBUG_S(PerlIO_printf(Perl_debug_log,
1289 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
1290 thr, PL_restartop, was_in_eval, PL_top_env));
1291 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
1293 return PL_restartop;
1296 #if defined(PERL_IMPLICIT_CONTEXT)
1298 Perl_die_nocontext(const char* pat, ...)
1303 va_start(args, pat);
1304 o = vdie(pat, &args);
1308 #endif /* PERL_IMPLICIT_CONTEXT */
1311 Perl_die(pTHX_ const char* pat, ...)
1315 va_start(args, pat);
1316 o = vdie(pat, &args);
1322 Perl_vcroak(pTHX_ const char* pat, va_list *args)
1325 const char *message;
1329 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
1332 PL_restartop = die_where(message, msglen);
1333 SvFLAGS(ERRSV) |= utf8;
1337 message = SvPVx_const(ERRSV, msglen);
1339 write_to_stderr(message, msglen);
1343 #if defined(PERL_IMPLICIT_CONTEXT)
1345 Perl_croak_nocontext(const char *pat, ...)
1349 va_start(args, pat);
1354 #endif /* PERL_IMPLICIT_CONTEXT */
1357 =head1 Warning and Dieing
1361 This is the XSUB-writer's interface to Perl's C<die> function.
1362 Normally call this function the same way you call the C C<printf>
1363 function. Calling C<croak> returns control directly to Perl,
1364 sidestepping the normal C order of execution. See C<warn>.
1366 If you want to throw an exception object, assign the object to
1367 C<$@> and then pass C<NULL> to croak():
1369 errsv = get_sv("@", TRUE);
1370 sv_setsv(errsv, exception_object);
1377 Perl_croak(pTHX_ const char *pat, ...)
1380 va_start(args, pat);
1387 Perl_vwarn(pTHX_ const char* pat, va_list *args)
1391 SV * const msv = vmess(pat, args);
1392 const I32 utf8 = SvUTF8(msv);
1393 const char * const message = SvPV_const(msv, msglen);
1396 if (vdie_common(message, msglen, utf8, TRUE))
1400 write_to_stderr(message, msglen);
1403 #if defined(PERL_IMPLICIT_CONTEXT)
1405 Perl_warn_nocontext(const char *pat, ...)
1409 va_start(args, pat);
1413 #endif /* PERL_IMPLICIT_CONTEXT */
1418 This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1419 function the same way you call the C C<printf> function. See C<croak>.
1425 Perl_warn(pTHX_ const char *pat, ...)
1428 va_start(args, pat);
1433 #if defined(PERL_IMPLICIT_CONTEXT)
1435 Perl_warner_nocontext(U32 err, const char *pat, ...)
1439 va_start(args, pat);
1440 vwarner(err, pat, &args);
1443 #endif /* PERL_IMPLICIT_CONTEXT */
1446 Perl_warner(pTHX_ U32 err, const char* pat,...)
1449 va_start(args, pat);
1450 vwarner(err, pat, &args);
1455 Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1458 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
1459 SV * const msv = vmess(pat, args);
1461 const char * const message = SvPV_const(msv, msglen);
1462 const I32 utf8 = SvUTF8(msv);
1466 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
1469 PL_restartop = die_where(message, msglen);
1470 SvFLAGS(ERRSV) |= utf8;
1473 write_to_stderr(message, msglen);
1477 Perl_vwarn(aTHX_ pat, args);
1481 /* implements the ckWARN? macros */
1484 Perl_ckwarn(pTHX_ U32 w)
1490 && PL_curcop->cop_warnings != pWARN_NONE
1492 PL_curcop->cop_warnings == pWARN_ALL
1493 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1494 || (unpackWARN2(w) &&
1495 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1496 || (unpackWARN3(w) &&
1497 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1498 || (unpackWARN4(w) &&
1499 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1504 isLEXWARN_off && PL_dowarn & G_WARN_ON
1509 /* implements the ckWARN?_d macro */
1512 Perl_ckwarn_d(pTHX_ U32 w)
1517 || PL_curcop->cop_warnings == pWARN_ALL
1519 PL_curcop->cop_warnings != pWARN_NONE
1521 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1522 || (unpackWARN2(w) &&
1523 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1524 || (unpackWARN3(w) &&
1525 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1526 || (unpackWARN4(w) &&
1527 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1533 /* Set buffer=NULL to get a new one. */
1535 Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
1537 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
1538 PERL_UNUSED_CONTEXT;
1541 (specialWARN(buffer) ?
1542 PerlMemShared_malloc(len_wanted) :
1543 PerlMemShared_realloc(buffer, len_wanted));
1545 Copy(bits, (buffer + 1), size, char);
1549 /* since we've already done strlen() for both nam and val
1550 * we can use that info to make things faster than
1551 * sprintf(s, "%s=%s", nam, val)
1553 #define my_setenv_format(s, nam, nlen, val, vlen) \
1554 Copy(nam, s, nlen, char); \
1556 Copy(val, s+(nlen+1), vlen, char); \
1557 *(s+(nlen+1+vlen)) = '\0'
1559 #if defined(USE_ENVIRON_ARRAY) && !defined(WIN32) && !defined(NETWARE)
1561 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1565 /* only parent thread can modify process environment */
1566 if (PL_curinterp == aTHX)
1569 #ifndef PERL_USE_SAFE_PUTENV
1570 if (!PL_use_safe_putenv) {
1571 /* The excuse for this code was that many putenv()s used to
1572 * leak, so we manipulate environ directly -- but the claim is
1573 * somewhat doubtful, since manipulating environment CANNOT be
1574 * made in a safe way, the env API and the whole concept are
1575 * fundamentally broken. */
1576 register I32 i = setenv_getix(nam); /* where does it go? */
1580 if (environ == PL_origenviron) { /* need we copy environment? */
1586 while (environ[max])
1588 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1589 for (j=0; j<max; j++) { /* copy environment */
1590 const int len = strlen(environ[j]);
1591 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1592 Copy(environ[j], tmpenv[j], len+1, char);
1595 environ = tmpenv; /* tell exec where it is now */
1598 safesysfree(environ[i]);
1599 while (environ[i]) {
1600 environ[i] = environ[i+1];
1605 if (!environ[i]) { /* does not exist yet */
1606 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1607 environ[i+1] = NULL; /* make sure it's null terminated */
1610 safesysfree(environ[i]);
1614 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1615 /* all that work just for this */
1616 my_setenv_format(environ[i], nam, nlen, val, vlen);
1620 # if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
1621 # if defined(HAS_UNSETENV)
1623 (void)unsetenv(nam);
1625 (void)setenv(nam, val, 1);
1627 # else /* ! HAS_UNSETENV */
1628 (void)setenv(nam, val, 1);
1629 # endif /* HAS_UNSETENV */
1631 # if defined(HAS_UNSETENV)
1633 (void)unsetenv(nam);
1635 const int nlen = strlen(nam);
1636 const int vlen = strlen(val);
1637 char * const new_env =
1638 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1639 my_setenv_format(new_env, nam, nlen, val, vlen);
1640 (void)putenv(new_env);
1642 # else /* ! HAS_UNSETENV */
1644 const int nlen = strlen(nam);
1650 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1651 /* all that work just for this */
1652 my_setenv_format(new_env, nam, nlen, val, vlen);
1653 (void)putenv(new_env);
1654 # endif /* HAS_UNSETENV */
1655 # endif /* __CYGWIN__ */
1656 #ifndef PERL_USE_SAFE_PUTENV
1662 #elif !defined(VMS) /* VMS has my_setenv in vms.c */
1665 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1668 #if !(defined(WIN32) || defined(NETWARE))
1669 # ifdef USE_ITHREADS
1670 /* only parent thread can modify process environment */
1671 if (PL_curinterp == aTHX)
1675 register char *envstr;
1676 const int nlen = strlen(nam);
1683 Newx(envstr, nlen+vlen+2, char);
1684 my_setenv_format(envstr, nam, nlen, val, vlen);
1685 (void)PerlEnv_putenv(envstr);
1690 #endif /* defined(USE_ENVIRON_ARRAY) && !defined(WIN32) && !defined(NETWARE) */
1695 Perl_setenv_getix(pTHX_ const char *nam)
1697 register I32 i = -1;
1698 register const I32 len = strlen(nam);
1699 PERL_UNUSED_CONTEXT;
1701 #ifdef USE_ENVIRON_ARRAY
1702 for (i = 0; environ[i]; i++) {
1705 strnicmp(environ[i],nam,len) == 0
1707 strnEQ(environ[i],nam,len)
1709 && environ[i][len] == '=')
1710 break; /* strnEQ must come first to avoid */
1711 } /* potential SEGV's */
1712 #endif /* USE_ENVIRON_ARRAY */
1717 #endif /* !PERL_VMS */
1719 #ifdef UNLINK_ALL_VERSIONS
1721 Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
1725 while (PerlLIO_unlink(f) >= 0)
1727 return retries ? 0 : -1;
1731 /* this is a drop-in replacement for bcopy() */
1732 #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
1734 Perl_my_bcopy(register const char *from,register char *to,register I32 len)
1736 char * const retval = to;
1738 if (from - to >= 0) {
1746 *(--to) = *(--from);
1752 /* this is a drop-in replacement for memset() */
1755 Perl_my_memset(register char *loc, register I32 ch, register I32 len)
1757 char * const retval = loc;
1765 /* this is a drop-in replacement for bzero() */
1766 #if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
1768 Perl_my_bzero(register char *loc, register I32 len)
1770 char * const retval = loc;
1778 /* this is a drop-in replacement for memcmp() */
1779 #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
1781 Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
1783 register const U8 *a = (const U8 *)s1;
1784 register const U8 *b = (const U8 *)s2;
1788 if ((tmp = *a++ - *b++))
1793 #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
1797 #ifdef USE_CHAR_VSPRINTF
1802 vsprintf(char *dest, const char *pat, char *args)
1806 fakebuf._ptr = dest;
1807 fakebuf._cnt = 32767;
1811 fakebuf._flag = _IOWRT|_IOSTRG;
1812 _doprnt(pat, args, &fakebuf); /* what a kludge */
1813 (void)putc('\0', &fakebuf);
1814 #ifdef USE_CHAR_VSPRINTF
1817 return 0; /* perl doesn't use return value */
1821 #endif /* HAS_VPRINTF */
1824 #if BYTEORDER != 0x4321
1826 Perl_my_swap(pTHX_ short s)
1828 #if (BYTEORDER & 1) == 0
1831 result = ((s & 255) << 8) + ((s >> 8) & 255);
1839 Perl_my_htonl(pTHX_ long l)
1843 char c[sizeof(long)];
1846 #if BYTEORDER == 0x1234
1847 u.c[0] = (l >> 24) & 255;
1848 u.c[1] = (l >> 16) & 255;
1849 u.c[2] = (l >> 8) & 255;
1853 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1854 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1859 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1860 u.c[o & 0xf] = (l >> s) & 255;
1868 Perl_my_ntohl(pTHX_ long l)
1872 char c[sizeof(long)];
1875 #if BYTEORDER == 0x1234
1876 u.c[0] = (l >> 24) & 255;
1877 u.c[1] = (l >> 16) & 255;
1878 u.c[2] = (l >> 8) & 255;
1882 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1883 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1890 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1891 l |= (u.c[o & 0xf] & 255) << s;
1898 #endif /* BYTEORDER != 0x4321 */
1902 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1903 * If these functions are defined,
1904 * the BYTEORDER is neither 0x1234 nor 0x4321.
1905 * However, this is not assumed.
1909 #define HTOLE(name,type) \
1911 name (register type n) \
1915 char c[sizeof(type)]; \
1918 register U32 s = 0; \
1919 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1920 u.c[i] = (n >> s) & 0xFF; \
1925 #define LETOH(name,type) \
1927 name (register type n) \
1931 char c[sizeof(type)]; \
1934 register U32 s = 0; \
1937 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1938 n |= ((type)(u.c[i] & 0xFF)) << s; \
1944 * Big-endian byte order functions.
1947 #define HTOBE(name,type) \
1949 name (register type n) \
1953 char c[sizeof(type)]; \
1956 register U32 s = 8*(sizeof(u.c)-1); \
1957 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1958 u.c[i] = (n >> s) & 0xFF; \
1963 #define BETOH(name,type) \
1965 name (register type n) \
1969 char c[sizeof(type)]; \
1972 register U32 s = 8*(sizeof(u.c)-1); \
1975 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1976 n |= ((type)(u.c[i] & 0xFF)) << s; \
1982 * If we just can't do it...
1985 #define NOT_AVAIL(name,type) \
1987 name (register type n) \
1989 Perl_croak_nocontext(#name "() not available"); \
1990 return n; /* not reached */ \
1994 #if defined(HAS_HTOVS) && !defined(htovs)
1997 #if defined(HAS_HTOVL) && !defined(htovl)
2000 #if defined(HAS_VTOHS) && !defined(vtohs)
2003 #if defined(HAS_VTOHL) && !defined(vtohl)
2007 #ifdef PERL_NEED_MY_HTOLE16
2009 HTOLE(Perl_my_htole16,U16)
2011 NOT_AVAIL(Perl_my_htole16,U16)
2014 #ifdef PERL_NEED_MY_LETOH16
2016 LETOH(Perl_my_letoh16,U16)
2018 NOT_AVAIL(Perl_my_letoh16,U16)
2021 #ifdef PERL_NEED_MY_HTOBE16
2023 HTOBE(Perl_my_htobe16,U16)
2025 NOT_AVAIL(Perl_my_htobe16,U16)
2028 #ifdef PERL_NEED_MY_BETOH16
2030 BETOH(Perl_my_betoh16,U16)
2032 NOT_AVAIL(Perl_my_betoh16,U16)
2036 #ifdef PERL_NEED_MY_HTOLE32
2038 HTOLE(Perl_my_htole32,U32)
2040 NOT_AVAIL(Perl_my_htole32,U32)
2043 #ifdef PERL_NEED_MY_LETOH32
2045 LETOH(Perl_my_letoh32,U32)
2047 NOT_AVAIL(Perl_my_letoh32,U32)
2050 #ifdef PERL_NEED_MY_HTOBE32
2052 HTOBE(Perl_my_htobe32,U32)
2054 NOT_AVAIL(Perl_my_htobe32,U32)
2057 #ifdef PERL_NEED_MY_BETOH32
2059 BETOH(Perl_my_betoh32,U32)
2061 NOT_AVAIL(Perl_my_betoh32,U32)
2065 #ifdef PERL_NEED_MY_HTOLE64
2067 HTOLE(Perl_my_htole64,U64)
2069 NOT_AVAIL(Perl_my_htole64,U64)
2072 #ifdef PERL_NEED_MY_LETOH64
2074 LETOH(Perl_my_letoh64,U64)
2076 NOT_AVAIL(Perl_my_letoh64,U64)
2079 #ifdef PERL_NEED_MY_HTOBE64
2081 HTOBE(Perl_my_htobe64,U64)
2083 NOT_AVAIL(Perl_my_htobe64,U64)
2086 #ifdef PERL_NEED_MY_BETOH64
2088 BETOH(Perl_my_betoh64,U64)
2090 NOT_AVAIL(Perl_my_betoh64,U64)
2094 #ifdef PERL_NEED_MY_HTOLES
2095 HTOLE(Perl_my_htoles,short)
2097 #ifdef PERL_NEED_MY_LETOHS
2098 LETOH(Perl_my_letohs,short)
2100 #ifdef PERL_NEED_MY_HTOBES
2101 HTOBE(Perl_my_htobes,short)
2103 #ifdef PERL_NEED_MY_BETOHS
2104 BETOH(Perl_my_betohs,short)
2107 #ifdef PERL_NEED_MY_HTOLEI
2108 HTOLE(Perl_my_htolei,int)
2110 #ifdef PERL_NEED_MY_LETOHI
2111 LETOH(Perl_my_letohi,int)
2113 #ifdef PERL_NEED_MY_HTOBEI
2114 HTOBE(Perl_my_htobei,int)
2116 #ifdef PERL_NEED_MY_BETOHI
2117 BETOH(Perl_my_betohi,int)
2120 #ifdef PERL_NEED_MY_HTOLEL
2121 HTOLE(Perl_my_htolel,long)
2123 #ifdef PERL_NEED_MY_LETOHL
2124 LETOH(Perl_my_letohl,long)
2126 #ifdef PERL_NEED_MY_HTOBEL
2127 HTOBE(Perl_my_htobel,long)
2129 #ifdef PERL_NEED_MY_BETOHL
2130 BETOH(Perl_my_betohl,long)
2134 Perl_my_swabn(void *ptr, int n)
2136 register char *s = (char *)ptr;
2137 register char *e = s + (n-1);
2140 for (n /= 2; n > 0; s++, e--, n--) {
2148 Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
2150 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
2153 register I32 This, that;
2159 PERL_FLUSHALL_FOR_CHILD;
2160 This = (*mode == 'w');
2164 taint_proper("Insecure %s%s", "EXEC");
2166 if (PerlProc_pipe(p) < 0)
2168 /* Try for another pipe pair for error return */
2169 if (PerlProc_pipe(pp) >= 0)
2171 while ((pid = PerlProc_fork()) < 0) {
2172 if (errno != EAGAIN) {
2173 PerlLIO_close(p[This]);
2174 PerlLIO_close(p[that]);
2176 PerlLIO_close(pp[0]);
2177 PerlLIO_close(pp[1]);
2189 /* Close parent's end of error status pipe (if any) */
2191 PerlLIO_close(pp[0]);
2192 #if defined(HAS_FCNTL) && defined(F_SETFD)
2193 /* Close error pipe automatically if exec works */
2194 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2197 /* Now dup our end of _the_ pipe to right position */
2198 if (p[THIS] != (*mode == 'r')) {
2199 PerlLIO_dup2(p[THIS], *mode == 'r');
2200 PerlLIO_close(p[THIS]);
2201 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2202 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2205 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2206 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2207 /* No automatic close - do it by hand */
2214 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
2220 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
2226 do_execfree(); /* free any memory malloced by child on fork */
2228 PerlLIO_close(pp[1]);
2229 /* Keep the lower of the two fd numbers */
2230 if (p[that] < p[This]) {
2231 PerlLIO_dup2(p[This], p[that]);
2232 PerlLIO_close(p[This]);
2236 PerlLIO_close(p[that]); /* close child's end of pipe */
2239 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2241 SvUPGRADE(sv,SVt_IV);
2243 PL_forkprocess = pid;
2244 /* If we managed to get status pipe check for exec fail */
2245 if (did_pipes && pid > 0) {
2250 while (n < sizeof(int)) {
2251 n1 = PerlLIO_read(pp[0],
2252 (void*)(((char*)&errkid)+n),
2258 PerlLIO_close(pp[0]);
2260 if (n) { /* Error */
2262 PerlLIO_close(p[This]);
2263 if (n != sizeof(int))
2264 Perl_croak(aTHX_ "panic: kid popen errno read");
2266 pid2 = wait4pid(pid, &status, 0);
2267 } while (pid2 == -1 && errno == EINTR);
2268 errno = errkid; /* Propagate errno from kid */
2273 PerlLIO_close(pp[0]);
2274 return PerlIO_fdopen(p[This], mode);
2276 Perl_croak(aTHX_ "List form of piped open not implemented");
2277 return (PerlIO *) NULL;
2281 /* VMS' my_popen() is in VMS.c, same with OS/2. */
2282 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
2284 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2288 register I32 This, that;
2291 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
2295 PERL_FLUSHALL_FOR_CHILD;
2298 return my_syspopen(aTHX_ cmd,mode);
2301 This = (*mode == 'w');
2303 if (doexec && PL_tainting) {
2305 taint_proper("Insecure %s%s", "EXEC");
2307 if (PerlProc_pipe(p) < 0)
2309 if (doexec && PerlProc_pipe(pp) >= 0)
2311 while ((pid = PerlProc_fork()) < 0) {
2312 if (errno != EAGAIN) {
2313 PerlLIO_close(p[This]);
2314 PerlLIO_close(p[that]);
2316 PerlLIO_close(pp[0]);
2317 PerlLIO_close(pp[1]);
2320 Perl_croak(aTHX_ "Can't fork");
2333 PerlLIO_close(pp[0]);
2334 #if defined(HAS_FCNTL) && defined(F_SETFD)
2335 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2338 if (p[THIS] != (*mode == 'r')) {
2339 PerlLIO_dup2(p[THIS], *mode == 'r');
2340 PerlLIO_close(p[THIS]);
2341 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2342 PerlLIO_close(p[THAT]);
2345 PerlLIO_close(p[THAT]);
2348 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2355 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2360 /* may or may not use the shell */
2361 do_exec3(cmd, pp[1], did_pipes);
2364 #endif /* defined OS2 */
2365 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
2366 SvREADONLY_off(GvSV(tmpgv));
2367 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
2368 SvREADONLY_on(GvSV(tmpgv));
2370 #ifdef THREADS_HAVE_PIDS
2371 PL_ppid = (IV)getppid();
2374 #ifdef PERL_USES_PL_PIDSTATUS
2375 hv_clear(PL_pidstatus); /* we have no children */
2381 do_execfree(); /* free any memory malloced by child on vfork */
2383 PerlLIO_close(pp[1]);
2384 if (p[that] < p[This]) {
2385 PerlLIO_dup2(p[This], p[that]);
2386 PerlLIO_close(p[This]);
2390 PerlLIO_close(p[that]);
2393 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2395 SvUPGRADE(sv,SVt_IV);
2397 PL_forkprocess = pid;
2398 if (did_pipes && pid > 0) {
2403 while (n < sizeof(int)) {
2404 n1 = PerlLIO_read(pp[0],
2405 (void*)(((char*)&errkid)+n),
2411 PerlLIO_close(pp[0]);
2413 if (n) { /* Error */
2415 PerlLIO_close(p[This]);
2416 if (n != sizeof(int))
2417 Perl_croak(aTHX_ "panic: kid popen errno read");
2419 pid2 = wait4pid(pid, &status, 0);
2420 } while (pid2 == -1 && errno == EINTR);
2421 errno = errkid; /* Propagate errno from kid */
2426 PerlLIO_close(pp[0]);
2427 return PerlIO_fdopen(p[This], mode);
2430 #if defined(atarist) || defined(EPOC)
2433 Perl_my_popen(pTHX_ char *cmd, char *mode)
2435 PERL_FLUSHALL_FOR_CHILD;
2436 /* Call system's popen() to get a FILE *, then import it.
2437 used 0 for 2nd parameter to PerlIO_importFILE;
2440 return PerlIO_importFILE(popen(cmd, mode), 0);
2444 FILE *djgpp_popen();
2446 Perl_my_popen(pTHX_ char *cmd, char *mode)
2448 PERL_FLUSHALL_FOR_CHILD;
2449 /* Call system's popen() to get a FILE *, then import it.
2450 used 0 for 2nd parameter to PerlIO_importFILE;
2453 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2458 #endif /* !DOSISH */
2460 /* this is called in parent before the fork() */
2462 Perl_atfork_lock(void)
2465 #if defined(USE_ITHREADS)
2466 /* locks must be held in locking order (if any) */
2468 MUTEX_LOCK(&PL_malloc_mutex);
2474 /* this is called in both parent and child after the fork() */
2476 Perl_atfork_unlock(void)
2479 #if defined(USE_ITHREADS)
2480 /* locks must be released in same order as in atfork_lock() */
2482 MUTEX_UNLOCK(&PL_malloc_mutex);
2491 #if defined(HAS_FORK)
2493 #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
2498 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2499 * handlers elsewhere in the code */
2504 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2505 Perl_croak_nocontext("fork() not available");
2507 #endif /* HAS_FORK */
2512 Perl_dump_fds(pTHX_ char *s)
2517 PerlIO_printf(Perl_debug_log,"%s", s);
2518 for (fd = 0; fd < 32; fd++) {
2519 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
2520 PerlIO_printf(Perl_debug_log," %d",fd);
2522 PerlIO_printf(Perl_debug_log,"\n");
2525 #endif /* DUMP_FDS */
2529 dup2(int oldfd, int newfd)
2531 #if defined(HAS_FCNTL) && defined(F_DUPFD)
2534 PerlLIO_close(newfd);
2535 return fcntl(oldfd, F_DUPFD, newfd);
2537 #define DUP2_MAX_FDS 256
2538 int fdtmp[DUP2_MAX_FDS];
2544 PerlLIO_close(newfd);
2545 /* good enough for low fd's... */
2546 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
2547 if (fdx >= DUP2_MAX_FDS) {
2555 PerlLIO_close(fdtmp[--fdx]);
2562 #ifdef HAS_SIGACTION
2564 #ifdef MACOS_TRADITIONAL
2565 /* We don't want restart behavior on MacOS */
2570 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2573 struct sigaction act, oact;
2576 /* only "parent" interpreter can diddle signals */
2577 if (PL_curinterp != aTHX)
2578 return (Sighandler_t) SIG_ERR;
2581 act.sa_handler = (void(*)(int))handler;
2582 sigemptyset(&act.sa_mask);
2585 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2586 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2588 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2589 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2590 act.sa_flags |= SA_NOCLDWAIT;
2592 if (sigaction(signo, &act, &oact) == -1)
2593 return (Sighandler_t) SIG_ERR;
2595 return (Sighandler_t) oact.sa_handler;
2599 Perl_rsignal_state(pTHX_ int signo)
2601 struct sigaction oact;
2602 PERL_UNUSED_CONTEXT;
2604 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2605 return (Sighandler_t) SIG_ERR;
2607 return (Sighandler_t) oact.sa_handler;
2611 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2614 struct sigaction act;
2617 /* only "parent" interpreter can diddle signals */
2618 if (PL_curinterp != aTHX)
2622 act.sa_handler = (void(*)(int))handler;
2623 sigemptyset(&act.sa_mask);
2626 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2627 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2629 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2630 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2631 act.sa_flags |= SA_NOCLDWAIT;
2633 return sigaction(signo, &act, save);
2637 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2641 /* only "parent" interpreter can diddle signals */
2642 if (PL_curinterp != aTHX)
2646 return sigaction(signo, save, (struct sigaction *)NULL);
2649 #else /* !HAS_SIGACTION */
2652 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2654 #if defined(USE_ITHREADS) && !defined(WIN32)
2655 /* only "parent" interpreter can diddle signals */
2656 if (PL_curinterp != aTHX)
2657 return (Sighandler_t) SIG_ERR;
2660 return PerlProc_signal(signo, handler);
2671 Perl_rsignal_state(pTHX_ int signo)
2674 Sighandler_t oldsig;
2676 #if defined(USE_ITHREADS) && !defined(WIN32)
2677 /* only "parent" interpreter can diddle signals */
2678 if (PL_curinterp != aTHX)
2679 return (Sighandler_t) SIG_ERR;
2683 oldsig = PerlProc_signal(signo, sig_trap);
2684 PerlProc_signal(signo, oldsig);
2686 PerlProc_kill(PerlProc_getpid(), signo);
2691 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2693 #if defined(USE_ITHREADS) && !defined(WIN32)
2694 /* only "parent" interpreter can diddle signals */
2695 if (PL_curinterp != aTHX)
2698 *save = PerlProc_signal(signo, handler);
2699 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
2703 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2705 #if defined(USE_ITHREADS) && !defined(WIN32)
2706 /* only "parent" interpreter can diddle signals */
2707 if (PL_curinterp != aTHX)
2710 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
2713 #endif /* !HAS_SIGACTION */
2714 #endif /* !PERL_MICRO */
2716 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
2717 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
2719 Perl_my_pclose(pTHX_ PerlIO *ptr)
2722 Sigsave_t hstat, istat, qstat;
2728 int saved_errno = 0;
2730 int saved_win32_errno;
2734 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
2736 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
2738 *svp = &PL_sv_undef;
2740 if (pid == -1) { /* Opened by popen. */
2741 return my_syspclose(ptr);
2744 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2745 saved_errno = errno;
2747 saved_win32_errno = GetLastError();
2751 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
2754 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2755 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2756 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
2759 pid2 = wait4pid(pid, &status, 0);
2760 } while (pid2 == -1 && errno == EINTR);
2762 rsignal_restore(SIGHUP, &hstat);
2763 rsignal_restore(SIGINT, &istat);
2764 rsignal_restore(SIGQUIT, &qstat);
2767 SETERRNO(saved_errno, 0);
2770 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
2772 #endif /* !DOSISH */
2774 #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
2776 Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
2782 #ifdef PERL_USES_PL_PIDSTATUS
2785 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2786 pid, rather than a string form. */
2787 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
2788 if (svp && *svp != &PL_sv_undef) {
2789 *statusp = SvIVX(*svp);
2790 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2798 hv_iterinit(PL_pidstatus);
2799 if ((entry = hv_iternext(PL_pidstatus))) {
2800 SV * const sv = hv_iterval(PL_pidstatus,entry);
2802 const char * const spid = hv_iterkey(entry,&len);
2804 assert (len == sizeof(Pid_t));
2805 memcpy((char *)&pid, spid, len);
2806 *statusp = SvIVX(sv);
2807 /* The hash iterator is currently on this entry, so simply
2808 calling hv_delete would trigger the lazy delete, which on
2809 aggregate does more work, beacuse next call to hv_iterinit()
2810 would spot the flag, and have to call the delete routine,
2811 while in the meantime any new entries can't re-use that
2813 hv_iterinit(PL_pidstatus);
2814 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
2821 # ifdef HAS_WAITPID_RUNTIME
2822 if (!HAS_WAITPID_RUNTIME)
2825 result = PerlProc_waitpid(pid,statusp,flags);
2828 #if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
2829 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
2832 #ifdef PERL_USES_PL_PIDSTATUS
2833 #if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
2838 Perl_croak(aTHX_ "Can't do waitpid with flags");
2840 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
2841 pidgone(result,*statusp);
2847 #if defined(HAS_WAITPID) || defined(HAS_WAIT4)
2850 if (result < 0 && errno == EINTR) {
2855 #endif /* !DOSISH || OS2 || WIN32 || NETWARE */
2857 #ifdef PERL_USES_PL_PIDSTATUS
2859 Perl_pidgone(pTHX_ Pid_t pid, int status)
2863 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
2864 SvUPGRADE(sv,SVt_IV);
2865 SvIV_set(sv, status);
2870 #if defined(atarist) || defined(OS2) || defined(EPOC)
2873 int /* Cannot prototype with I32
2875 my_syspclose(PerlIO *ptr)
2878 Perl_my_pclose(pTHX_ PerlIO *ptr)
2881 /* Needs work for PerlIO ! */
2882 FILE * const f = PerlIO_findFILE(ptr);
2883 const I32 result = pclose(f);
2884 PerlIO_releaseFILE(ptr,f);
2892 Perl_my_pclose(pTHX_ PerlIO *ptr)
2894 /* Needs work for PerlIO ! */
2895 FILE * const f = PerlIO_findFILE(ptr);
2896 I32 result = djgpp_pclose(f);
2897 result = (result << 8) & 0xff00;
2898 PerlIO_releaseFILE(ptr,f);
2904 Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
2907 register const char * const frombase = from;
2908 PERL_UNUSED_CONTEXT;
2911 register const char c = *from;
2916 while (count-- > 0) {
2917 for (todo = len; todo > 0; todo--) {
2926 Perl_same_dirent(pTHX_ const char *a, const char *b)
2928 char *fa = strrchr(a,'/');
2929 char *fb = strrchr(b,'/');
2932 SV * const tmpsv = sv_newmortal();
2945 sv_setpvn(tmpsv, ".", 1);
2947 sv_setpvn(tmpsv, a, fa - a);
2948 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
2951 sv_setpvn(tmpsv, ".", 1);
2953 sv_setpvn(tmpsv, b, fb - b);
2954 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
2956 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2957 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2959 #endif /* !HAS_RENAME */
2962 Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
2963 const char *const *const search_ext, I32 flags)
2966 const char *xfound = NULL;
2967 char *xfailed = NULL;
2968 char tmpbuf[MAXPATHLEN];
2972 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2973 # define SEARCH_EXTS ".bat", ".cmd", NULL
2974 # define MAX_EXT_LEN 4
2977 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2978 # define MAX_EXT_LEN 4
2981 # define SEARCH_EXTS ".pl", ".com", NULL
2982 # define MAX_EXT_LEN 4
2984 /* additional extensions to try in each dir if scriptname not found */
2986 static const char *const exts[] = { SEARCH_EXTS };
2987 const char *const *const ext = search_ext ? search_ext : exts;
2988 int extidx = 0, i = 0;
2989 const char *curext = NULL;
2991 PERL_UNUSED_ARG(search_ext);
2992 # define MAX_EXT_LEN 0
2996 * If dosearch is true and if scriptname does not contain path
2997 * delimiters, search the PATH for scriptname.
2999 * If SEARCH_EXTS is also defined, will look for each
3000 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3001 * while searching the PATH.
3003 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3004 * proceeds as follows:
3005 * If DOSISH or VMSISH:
3006 * + look for ./scriptname{,.foo,.bar}
3007 * + search the PATH for scriptname{,.foo,.bar}
3010 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3011 * this will not look in '.' if it's not in the PATH)
3016 # ifdef ALWAYS_DEFTYPES
3017 len = strlen(scriptname);
3018 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
3019 int idx = 0, deftypes = 1;
3022 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
3025 int idx = 0, deftypes = 1;
3028 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
3030 /* The first time through, just add SEARCH_EXTS to whatever we
3031 * already have, so we can check for default file types. */
3033 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
3039 if ((strlen(tmpbuf) + strlen(scriptname)
3040 + MAX_EXT_LEN) >= sizeof tmpbuf)
3041 continue; /* don't search dir with too-long name */
3042 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
3046 if (strEQ(scriptname, "-"))
3048 if (dosearch) { /* Look in '.' first. */
3049 const char *cur = scriptname;
3051 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3053 if (strEQ(ext[i++],curext)) {
3054 extidx = -1; /* already has an ext */
3059 DEBUG_p(PerlIO_printf(Perl_debug_log,
3060 "Looking for %s\n",cur));
3061 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3062 && !S_ISDIR(PL_statbuf.st_mode)) {
3070 if (cur == scriptname) {
3071 len = strlen(scriptname);
3072 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
3074 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3077 } while (extidx >= 0 && ext[extidx] /* try an extension? */
3078 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
3083 #ifdef MACOS_TRADITIONAL
3084 if (dosearch && !strchr(scriptname, ':') &&
3085 (s = PerlEnv_getenv("Commands")))
3087 if (dosearch && !strchr(scriptname, '/')
3089 && !strchr(scriptname, '\\')
3091 && (s = PerlEnv_getenv("PATH")))
3096 PL_bufend = s + strlen(s);
3097 while (s < PL_bufend) {
3098 #ifdef MACOS_TRADITIONAL
3099 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
3103 #if defined(atarist) || defined(DOSISH)
3108 && *s != ';'; len++, s++) {
3109 if (len < sizeof tmpbuf)
3112 if (len < sizeof tmpbuf)
3114 #else /* ! (atarist || DOSISH) */
3115 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
3118 #endif /* ! (atarist || DOSISH) */
3119 #endif /* MACOS_TRADITIONAL */
3122 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
3123 continue; /* don't search dir with too-long name */
3124 #ifdef MACOS_TRADITIONAL
3125 if (len && tmpbuf[len - 1] != ':')
3126 tmpbuf[len++] = ':';
3129 # if defined(atarist) || defined(__MINT__) || defined(DOSISH)
3130 && tmpbuf[len - 1] != '/'
3131 && tmpbuf[len - 1] != '\\'
3134 tmpbuf[len++] = '/';
3135 if (len == 2 && tmpbuf[0] == '.')
3138 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
3142 len = strlen(tmpbuf);
3143 if (extidx > 0) /* reset after previous loop */
3147 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3148 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
3149 if (S_ISDIR(PL_statbuf.st_mode)) {
3153 } while ( retval < 0 /* not there */
3154 && extidx>=0 && ext[extidx] /* try an extension? */
3155 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
3160 if (S_ISREG(PL_statbuf.st_mode)
3161 && cando(S_IRUSR,TRUE,&PL_statbuf)
3162 #if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3163 && cando(S_IXUSR,TRUE,&PL_statbuf)
3167 xfound = tmpbuf; /* bingo! */
3171 xfailed = savepv(tmpbuf);
3174 if (!xfound && !seen_dot && !xfailed &&
3175 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
3176 || S_ISDIR(PL_statbuf.st_mode)))
3178 seen_dot = 1; /* Disable message. */
3180 if (flags & 1) { /* do or die? */
3181 Perl_croak(aTHX_ "Can't %s %s%s%s",
3182 (xfailed ? "execute" : "find"),
3183 (xfailed ? xfailed : scriptname),
3184 (xfailed ? "" : " on PATH"),
3185 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3190 scriptname = xfound;
3192 return (scriptname ? savepv(scriptname) : NULL);
3195 #ifndef PERL_GET_CONTEXT_DEFINED
3198 Perl_get_context(void)
3201 #if defined(USE_ITHREADS)
3202 # ifdef OLD_PTHREADS_API
3204 if (pthread_getspecific(PL_thr_key, &t))
3205 Perl_croak_nocontext("panic: pthread_getspecific");
3208 # ifdef I_MACH_CTHREADS
3209 return (void*)cthread_data(cthread_self());
3211 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3220 Perl_set_context(void *t)
3223 #if defined(USE_ITHREADS)
3224 # ifdef I_MACH_CTHREADS
3225 cthread_set_data(cthread_self(), t);
3227 if (pthread_setspecific(PL_thr_key, t))
3228 Perl_croak_nocontext("panic: pthread_setspecific");
3235 #endif /* !PERL_GET_CONTEXT_DEFINED */
3237 #if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
3246 Perl_get_op_names(pTHX)
3248 PERL_UNUSED_CONTEXT;
3249 return (char **)PL_op_name;
3253 Perl_get_op_descs(pTHX)
3255 PERL_UNUSED_CONTEXT;
3256 return (char **)PL_op_desc;
3260 Perl_get_no_modify(pTHX)
3262 PERL_UNUSED_CONTEXT;
3263 return PL_no_modify;
3267 Perl_get_opargs(pTHX)
3269 PERL_UNUSED_CONTEXT;
3270 return (U32 *)PL_opargs;
3274 Perl_get_ppaddr(pTHX)
3277 PERL_UNUSED_CONTEXT;
3278 return (PPADDR_t*)PL_ppaddr;
3281 #ifndef HAS_GETENV_LEN
3283 Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
3285 char * const env_trans = PerlEnv_getenv(env_elem);
3286 PERL_UNUSED_CONTEXT;
3288 *len = strlen(env_trans);
3295 Perl_get_vtbl(pTHX_ int vtbl_id)
3297 const MGVTBL* result;
3298 PERL_UNUSED_CONTEXT;
3302 result = &PL_vtbl_sv;
3305 result = &PL_vtbl_env;
3307 case want_vtbl_envelem:
3308 result = &PL_vtbl_envelem;
3311 result = &PL_vtbl_sig;
3313 case want_vtbl_sigelem:
3314 result = &PL_vtbl_sigelem;
3316 case want_vtbl_pack:
3317 result = &PL_vtbl_pack;
3319 case want_vtbl_packelem:
3320 result = &PL_vtbl_packelem;
3322 case want_vtbl_dbline:
3323 result = &PL_vtbl_dbline;
3326 result = &PL_vtbl_isa;
3328 case want_vtbl_isaelem:
3329 result = &PL_vtbl_isaelem;
3331 case want_vtbl_arylen:
3332 result = &PL_vtbl_arylen;
3334 case want_vtbl_mglob:
3335 result = &PL_vtbl_mglob;
3337 case want_vtbl_nkeys:
3338 result = &PL_vtbl_nkeys;
3340 case want_vtbl_taint:
3341 result = &PL_vtbl_taint;
3343 case want_vtbl_substr:
3344 result = &PL_vtbl_substr;
3347 result = &PL_vtbl_vec;
3350 result = &PL_vtbl_pos;
3353 result = &PL_vtbl_bm;
3356 result = &PL_vtbl_fm;
3358 case want_vtbl_uvar:
3359 result = &PL_vtbl_uvar;
3361 case want_vtbl_defelem:
3362 result = &PL_vtbl_defelem;
3364 case want_vtbl_regexp:
3365 result = &PL_vtbl_regexp;
3367 case want_vtbl_regdata:
3368 result = &PL_vtbl_regdata;
3370 case want_vtbl_regdatum:
3371 result = &PL_vtbl_regdatum;
3373 #ifdef USE_LOCALE_COLLATE
3374 case want_vtbl_collxfrm:
3375 result = &PL_vtbl_collxfrm;
3378 case want_vtbl_amagic:
3379 result = &PL_vtbl_amagic;
3381 case want_vtbl_amagicelem:
3382 result = &PL_vtbl_amagicelem;
3384 case want_vtbl_backref:
3385 result = &PL_vtbl_backref;
3387 case want_vtbl_utf8:
3388 result = &PL_vtbl_utf8;
3394 return (MGVTBL*)result;
3398 Perl_my_fflush_all(pTHX)
3400 #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
3401 return PerlIO_flush(NULL);
3403 # if defined(HAS__FWALK)
3404 extern int fflush(FILE *);
3405 /* undocumented, unprototyped, but very useful BSDism */
3406 extern void _fwalk(int (*)(FILE *));
3410 # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
3412 # ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3413 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3415 # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3416 open_max = sysconf(_SC_OPEN_MAX);
3419 open_max = FOPEN_MAX;
3422 open_max = OPEN_MAX;
3433 for (i = 0; i < open_max; i++)
3434 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3435 STDIO_STREAM_ARRAY[i]._file < open_max &&
3436 STDIO_STREAM_ARRAY[i]._flag)
3437 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
3441 SETERRNO(EBADF,RMS_IFI);
3448 Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
3450 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
3452 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3453 if (ckWARN(WARN_IO)) {
3454 const char * const direction =
3455 (const char *)((op == OP_phoney_INPUT_ONLY) ? "in" : "out");
3457 Perl_warner(aTHX_ packWARN(WARN_IO),
3458 "Filehandle %s opened only for %sput",
3461 Perl_warner(aTHX_ packWARN(WARN_IO),
3462 "Filehandle opened only for %sput", direction);
3469 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3471 warn_type = WARN_CLOSED;
3475 warn_type = WARN_UNOPENED;
3478 if (ckWARN(warn_type)) {
3479 const char * const pars =
3480 (const char *)(OP_IS_FILETEST(op) ? "" : "()");
3481 const char * const func =
3483 (op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3484 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3485 op < 0 ? "" : /* handle phoney cases */
3487 const char * const type =
3489 (OP_IS_SOCKET(op) ||
3490 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
3491 "socket" : "filehandle");
3492 if (name && *name) {
3493 Perl_warner(aTHX_ packWARN(warn_type),
3494 "%s%s on %s %s %s", func, pars, vile, type, name);
3495 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3497 aTHX_ packWARN(warn_type),
3498 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3503 Perl_warner(aTHX_ packWARN(warn_type),
3504 "%s%s on %s %s", func, pars, vile, type);
3505 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3507 aTHX_ packWARN(warn_type),
3508 "\t(Are you trying to call %s%s on dirhandle?)\n",
3517 /* in ASCII order, not that it matters */
3518 static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3521 Perl_ebcdic_control(pTHX_ int ch)
3529 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3530 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3533 if (ctlp == controllablechars)
3534 return('\177'); /* DEL */
3536 return((unsigned char)(ctlp - controllablechars - 1));
3537 } else { /* Want uncontrol */
3538 if (ch == '\177' || ch == -1)
3540 else if (ch == '\157')
3542 else if (ch == '\174')
3544 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3546 else if (ch == '\155')
3548 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3549 return(controllablechars[ch+1]);
3551 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3556 /* To workaround core dumps from the uninitialised tm_zone we get the
3557 * system to give us a reasonable struct to copy. This fix means that
3558 * strftime uses the tm_zone and tm_gmtoff values returned by
3559 * localtime(time()). That should give the desired result most of the
3560 * time. But probably not always!
3562 * This does not address tzname aspects of NETaa14816.
3567 # ifndef STRUCT_TM_HASZONE
3568 # define STRUCT_TM_HASZONE
3572 #ifdef STRUCT_TM_HASZONE /* Backward compat */
3573 # ifndef HAS_TM_TM_ZONE
3574 # define HAS_TM_TM_ZONE
3579 Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
3581 #ifdef HAS_TM_TM_ZONE
3583 const struct tm* my_tm;
3585 my_tm = localtime(&now);
3587 Copy(my_tm, ptm, 1, struct tm);
3589 PERL_UNUSED_ARG(ptm);
3594 * mini_mktime - normalise struct tm values without the localtime()
3595 * semantics (and overhead) of mktime().
3598 Perl_mini_mktime(pTHX_ struct tm *ptm)
3602 int month, mday, year, jday;
3603 int odd_cent, odd_year;
3604 PERL_UNUSED_CONTEXT;
3606 #define DAYS_PER_YEAR 365
3607 #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3608 #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3609 #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3610 #define SECS_PER_HOUR (60*60)
3611 #define SECS_PER_DAY (24*SECS_PER_HOUR)
3612 /* parentheses deliberately absent on these two, otherwise they don't work */
3613 #define MONTH_TO_DAYS 153/5
3614 #define DAYS_TO_MONTH 5/153
3615 /* offset to bias by March (month 4) 1st between month/mday & year finding */
3616 #define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3617 /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3618 #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3621 * Year/day algorithm notes:
3623 * With a suitable offset for numeric value of the month, one can find
3624 * an offset into the year by considering months to have 30.6 (153/5) days,
3625 * using integer arithmetic (i.e., with truncation). To avoid too much
3626 * messing about with leap days, we consider January and February to be
3627 * the 13th and 14th month of the previous year. After that transformation,
3628 * we need the month index we use to be high by 1 from 'normal human' usage,
3629 * so the month index values we use run from 4 through 15.
3631 * Given that, and the rules for the Gregorian calendar (leap years are those
3632 * divisible by 4 unless also divisible by 100, when they must be divisible
3633 * by 400 instead), we can simply calculate the number of days since some
3634 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3635 * the days we derive from our month index, and adding in the day of the
3636 * month. The value used here is not adjusted for the actual origin which
3637 * it normally would use (1 January A.D. 1), since we're not exposing it.
3638 * We're only building the value so we can turn around and get the
3639 * normalised values for the year, month, day-of-month, and day-of-year.
3641 * For going backward, we need to bias the value we're using so that we find
3642 * the right year value. (Basically, we don't want the contribution of
3643 * March 1st to the number to apply while deriving the year). Having done
3644 * that, we 'count up' the contribution to the year number by accounting for
3645 * full quadracenturies (400-year periods) with their extra leap days, plus
3646 * the contribution from full centuries (to avoid counting in the lost leap
3647 * days), plus the contribution from full quad-years (to count in the normal
3648 * leap days), plus the leftover contribution from any non-leap years.
3649 * At this point, if we were working with an actual leap day, we'll have 0
3650 * days left over. This is also true for March 1st, however. So, we have
3651 * to special-case that result, and (earlier) keep track of the 'odd'
3652 * century and year contributions. If we got 4 extra centuries in a qcent,
3653 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3654 * Otherwise, we add back in the earlier bias we removed (the 123 from
3655 * figuring in March 1st), find the month index (integer division by 30.6),
3656 * and the remainder is the day-of-month. We then have to convert back to
3657 * 'real' months (including fixing January and February from being 14/15 in
3658 * the previous year to being in the proper year). After that, to get
3659 * tm_yday, we work with the normalised year and get a new yearday value for
3660 * January 1st, which we subtract from the yearday value we had earlier,
3661 * representing the date we've re-built. This is done from January 1
3662 * because tm_yday is 0-origin.
3664 * Since POSIX time routines are only guaranteed to work for times since the
3665 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3666 * applies Gregorian calendar rules even to dates before the 16th century
3667 * doesn't bother me. Besides, you'd need cultural context for a given
3668 * date to know whether it was Julian or Gregorian calendar, and that's
3669 * outside the scope for this routine. Since we convert back based on the
3670 * same rules we used to build the yearday, you'll only get strange results
3671 * for input which needed normalising, or for the 'odd' century years which
3672 * were leap years in the Julian calander but not in the Gregorian one.
3673 * I can live with that.
3675 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3676 * that's still outside the scope for POSIX time manipulation, so I don't
3680 year = 1900 + ptm->tm_year;
3681 month = ptm->tm_mon;
3682 mday = ptm->tm_mday;
3683 /* allow given yday with no month & mday to dominate the result */
3684 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3687 jday = 1 + ptm->tm_yday;
3696 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3697 yearday += month*MONTH_TO_DAYS + mday + jday;
3699 * Note that we don't know when leap-seconds were or will be,
3700 * so we have to trust the user if we get something which looks
3701 * like a sensible leap-second. Wild values for seconds will
3702 * be rationalised, however.
3704 if ((unsigned) ptm->tm_sec <= 60) {
3711 secs += 60 * ptm->tm_min;
3712 secs += SECS_PER_HOUR * ptm->tm_hour;
3714 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3715 /* got negative remainder, but need positive time */
3716 /* back off an extra day to compensate */
3717 yearday += (secs/SECS_PER_DAY)-1;
3718 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3721 yearday += (secs/SECS_PER_DAY);
3722 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3725 else if (secs >= SECS_PER_DAY) {
3726 yearday += (secs/SECS_PER_DAY);
3727 secs %= SECS_PER_DAY;
3729 ptm->tm_hour = secs/SECS_PER_HOUR;
3730 secs %= SECS_PER_HOUR;
3731 ptm->tm_min = secs/60;
3733 ptm->tm_sec += secs;
3734 /* done with time of day effects */
3736 * The algorithm for yearday has (so far) left it high by 428.
3737 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3738 * bias it by 123 while trying to figure out what year it
3739 * really represents. Even with this tweak, the reverse
3740 * translation fails for years before A.D. 0001.
3741 * It would still fail for Feb 29, but we catch that one below.
3743 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3744 yearday -= YEAR_ADJUST;
3745 year = (yearday / DAYS_PER_QCENT) * 400;
3746 yearday %= DAYS_PER_QCENT;
3747 odd_cent = yearday / DAYS_PER_CENT;
3748 year += odd_cent * 100;
3749 yearday %= DAYS_PER_CENT;
3750 year += (yearday / DAYS_PER_QYEAR) * 4;
3751 yearday %= DAYS_PER_QYEAR;
3752 odd_year = yearday / DAYS_PER_YEAR;
3754 yearday %= DAYS_PER_YEAR;
3755 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3760 yearday += YEAR_ADJUST; /* recover March 1st crock */
3761 month = yearday*DAYS_TO_MONTH;
3762 yearday -= month*MONTH_TO_DAYS;
3763 /* recover other leap-year adjustment */
3772 ptm->tm_year = year - 1900;
3774 ptm->tm_mday = yearday;
3775 ptm->tm_mon = month;
3779 ptm->tm_mon = month - 1;
3781 /* re-build yearday based on Jan 1 to get tm_yday */
3783 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3784 yearday += 14*MONTH_TO_DAYS + 1;
3785 ptm->tm_yday = jday - yearday;
3786 /* fix tm_wday if not overridden by caller */
3787 if ((unsigned)ptm->tm_wday > 6)
3788 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3792 Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
3800 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3803 mytm.tm_hour = hour;
3804 mytm.tm_mday = mday;
3806 mytm.tm_year = year;
3807 mytm.tm_wday = wday;
3808 mytm.tm_yday = yday;
3809 mytm.tm_isdst = isdst;
3811 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3812 #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3817 #ifdef HAS_TM_TM_GMTOFF
3818 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3820 #ifdef HAS_TM_TM_ZONE
3821 mytm.tm_zone = mytm2.tm_zone;
3826 Newx(buf, buflen, char);
3827 len = strftime(buf, buflen, fmt, &mytm);
3829 ** The following is needed to handle to the situation where
3830 ** tmpbuf overflows. Basically we want to allocate a buffer
3831 ** and try repeatedly. The reason why it is so complicated
3832 ** is that getting a return value of 0 from strftime can indicate
3833 ** one of the following:
3834 ** 1. buffer overflowed,
3835 ** 2. illegal conversion specifier, or
3836 ** 3. the format string specifies nothing to be returned(not
3837 ** an error). This could be because format is an empty string
3838 ** or it specifies %p that yields an empty string in some locale.
3839 ** If there is a better way to make it portable, go ahead by
3842 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3845 /* Possibly buf overflowed - try again with a bigger buf */
3846 const int fmtlen = strlen(fmt);
3847 const int bufsize = fmtlen + buflen;
3849 Newx(buf, bufsize, char);
3851 buflen = strftime(buf, bufsize, fmt, &mytm);
3852 if (buflen > 0 && buflen < bufsize)
3854 /* heuristic to prevent out-of-memory errors */
3855 if (bufsize > 100*fmtlen) {
3860 Renew(buf, bufsize*2, char);
3865 Perl_croak(aTHX_ "panic: no strftime");
3871 #define SV_CWD_RETURN_UNDEF \
3872 sv_setsv(sv, &PL_sv_undef); \
3875 #define SV_CWD_ISDOT(dp) \
3876 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3877 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
3880 =head1 Miscellaneous Functions
3882 =for apidoc getcwd_sv
3884 Fill the sv with current working directory
3889 /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3890 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3891 * getcwd(3) if available
3892 * Comments from the orignal:
3893 * This is a faster version of getcwd. It's also more dangerous
3894 * because you might chdir out of a directory that you can't chdir
3898 Perl_getcwd_sv(pTHX_ register SV *sv)
3902 #ifndef INCOMPLETE_TAINTS
3908 char buf[MAXPATHLEN];
3910 /* Some getcwd()s automatically allocate a buffer of the given
3911 * size from the heap if they are given a NULL buffer pointer.
3912 * The problem is that this behaviour is not portable. */
3913 if (getcwd(buf, sizeof(buf) - 1)) {
3918 sv_setsv(sv, &PL_sv_undef);
3926 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
3930 SvUPGRADE(sv, SVt_PV);
3932 if (PerlLIO_lstat(".", &statbuf) < 0) {
3933 SV_CWD_RETURN_UNDEF;
3936 orig_cdev = statbuf.st_dev;
3937 orig_cino = statbuf.st_ino;
3946 if (PerlDir_chdir("..") < 0) {
3947 SV_CWD_RETURN_UNDEF;
3949 if (PerlLIO_stat(".", &statbuf) < 0) {
3950 SV_CWD_RETURN_UNDEF;
3953 cdev = statbuf.st_dev;
3954 cino = statbuf.st_ino;
3956 if (odev == cdev && oino == cino) {
3959 if (!(dir = PerlDir_open("."))) {
3960 SV_CWD_RETURN_UNDEF;
3963 while ((dp = PerlDir_read(dir)) != NULL) {
3965 const int namelen = dp->d_namlen;
3967 const int namelen = strlen(dp->d_name);
3970 if (SV_CWD_ISDOT(dp)) {
3974 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
3975 SV_CWD_RETURN_UNDEF;
3978 tdev = statbuf.st_dev;
3979 tino = statbuf.st_ino;
3980 if (tino == oino && tdev == odev) {
3986 SV_CWD_RETURN_UNDEF;
3989 if (pathlen + namelen + 1 >= MAXPATHLEN) {
3990 SV_CWD_RETURN_UNDEF;
3993 SvGROW(sv, pathlen + namelen + 1);
3997 Move(SvPVX_const(sv), SvPVX(sv) + namelen + 1, pathlen, char);
4000 /* prepend current directory to the front */
4002 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
4003 pathlen += (namelen + 1);
4005 #ifdef VOID_CLOSEDIR
4008 if (PerlDir_close(dir) < 0) {
4009 SV_CWD_RETURN_UNDEF;
4015 SvCUR_set(sv, pathlen);
4019 if (PerlDir_chdir(SvPVX_const(sv)) < 0) {
4020 SV_CWD_RETURN_UNDEF;
4023 if (PerlLIO_stat(".", &statbuf) < 0) {
4024 SV_CWD_RETURN_UNDEF;
4027 cdev = statbuf.st_dev;
4028 cino = statbuf.st_ino;
4030 if (cdev != orig_cdev || cino != orig_cino) {
4031 Perl_croak(aTHX_ "Unstable directory path, "
4032 "current directory changed unexpectedly");
4044 =for apidoc scan_version
4046 Returns a pointer to the next character after the parsed
4047 version string, as well as upgrading the passed in SV to
4050 Function must be called with an already existing SV like
4053 s = scan_version(s,SV *sv, bool qv);
4055 Performs some preprocessing to the string to ensure that
4056 it has the correct characteristics of a version. Flags the
4057 object if it contains an underscore (which denotes this
4058 is a alpha version). The boolean qv denotes that the version
4059 should be interpreted as if it had multiple decimals, even if
4066 Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv)
4074 AV * const av = newAV();
4075 SV * const hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
4076 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4078 #ifndef NODEFAULT_SHAREKEYS
4079 HvSHAREKEYS_on(hv); /* key-sharing on by default */
4082 while (isSPACE(*s)) /* leading whitespace is OK */
4086 s++; /* get past 'v' */
4087 qv = 1; /* force quoted version processing */
4090 start = last = pos = s;
4092 /* pre-scan the input string to check for decimals/underbars */
4093 while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) )
4098 Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
4102 else if ( *pos == '_' )
4105 Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
4107 width = pos - last - 1; /* natural width of sub-version */
4112 if ( alpha && !saw_period )
4113 Perl_croak(aTHX_ "Invalid version format (alpha without decimal)");
4115 if ( saw_period > 1 )
4116 qv = 1; /* force quoted version processing */
4121 hv_store((HV *)hv, "qv", 2, newSViv(qv), 0);
4123 hv_store((HV *)hv, "alpha", 5, newSViv(alpha), 0);
4124 if ( !qv && width < 3 )
4125 hv_store((HV *)hv, "width", 5, newSViv(width), 0);
4127 while (isDIGIT(*pos))
4129 if (!isALPHA(*pos)) {
4135 /* this is atoi() that delimits on underscores */
4136 const char *end = pos;
4140 /* the following if() will only be true after the decimal
4141 * point of a version originally created with a bare
4142 * floating point number, i.e. not quoted in any way
4144 if ( !qv && s > start && saw_period == 1 ) {
4148 rev += (*s - '0') * mult;
4150 if ( PERL_ABS(orev) > PERL_ABS(rev) )
4151 Perl_croak(aTHX_ "Integer overflow in version");
4158 while (--end >= s) {
4160 rev += (*end - '0') * mult;
4162 if ( PERL_ABS(orev) > PERL_ABS(rev) )
4163 Perl_croak(aTHX_ "Integer overflow in version");
4168 /* Append revision */
4169 av_push(av, newSViv(rev));
4172 else if ( *pos == '_' && isDIGIT(pos[1]) )
4174 else if ( isDIGIT(*pos) )
4181 while ( isDIGIT(*pos) )
4186 while ( ( isDIGIT(*pos) || *pos == '_' ) && digits < 3 ) {
4194 if ( qv ) { /* quoted versions always get at least three terms*/
4195 I32 len = av_len(av);
4196 /* This for loop appears to trigger a compiler bug on OS X, as it
4197 loops infinitely. Yes, len is negative. No, it makes no sense.
4198 Compiler in question is:
4199 gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
4200 for ( len = 2 - len; len > 0; len-- )
4201 av_push((AV *)sv, newSViv(0));
4205 av_push(av, newSViv(0));
4208 if ( av_len(av) == -1 ) /* oops, someone forgot to pass a value */
4209 av_push(av, newSViv(0));
4211 /* fix RT#19517 - special case 'undef' as string */
4212 if ( *s == 'u' && strEQ(s,"undef") ) {
4216 /* And finally, store the AV in the hash */
4217 hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0);
4222 =for apidoc new_version
4224 Returns a new version object based on the passed in SV:
4226 SV *sv = new_version(SV *ver);
4228 Does not alter the passed in ver SV. See "upg_version" if you
4229 want to upgrade the SV.
4235 Perl_new_version(pTHX_ SV *ver)
4238 SV * const rv = newSV(0);
4239 if ( sv_derived_from(ver,"version") ) /* can just copy directly */
4242 AV * const av = newAV();
4244 /* This will get reblessed later if a derived class*/
4245 SV * const hv = newSVrv(rv, "version");
4246 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4247 #ifndef NODEFAULT_SHAREKEYS
4248 HvSHAREKEYS_on(hv); /* key-sharing on by default */
4254 /* Begin copying all of the elements */
4255 if ( hv_exists((HV *)ver, "qv", 2) )
4256 hv_store((HV *)hv, "qv", 2, &PL_sv_yes, 0);
4258 if ( hv_exists((HV *)ver, "alpha", 5) )
4259 hv_store((HV *)hv, "alpha", 5, &PL_sv_yes, 0);
4261 if ( hv_exists((HV*)ver, "width", 5 ) )
4263 const I32 width = SvIV(*hv_fetchs((HV*)ver, "width", FALSE));
4264 hv_store((HV *)hv, "width", 5, newSViv(width), 0);
4267 sav = (AV *)SvRV(*hv_fetchs((HV*)ver, "version", FALSE));
4268 /* This will get reblessed later if a derived class*/
4269 for ( key = 0; key <= av_len(sav); key++ )
4271 const I32 rev = SvIV(*av_fetch(sav, key, FALSE));
4272 av_push(av, newSViv(rev));
4275 hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0);
4280 const MAGIC* const mg = SvVSTRING_mg(ver);
4281 if ( mg ) { /* already a v-string */
4282 const STRLEN len = mg->mg_len;
4283 char * const version = savepvn( (const char*)mg->mg_ptr, len);
4284 sv_setpvn(rv,version,len);
4289 sv_setsv(rv,ver); /* make a duplicate */
4294 return upg_version(rv);
4298 =for apidoc upg_version
4300 In-place upgrade of the supplied SV to a version object.
4302 SV *sv = upg_version(SV *sv);
4304 Returns a pointer to the upgraded SV.
4310 Perl_upg_version(pTHX_ SV *ver)
4312 const char *version, *s;
4318 if ( SvNOK(ver) ) /* may get too much accuracy */
4321 SET_NUMERIC_STANDARD();
4322 STRLEN len = my_snprintf(tbuf, sizeof(tbuf), "%.9"NVff, SvNVX(ver));
4323 SET_NUMERIC_LOCAL();
4324 while (tbuf[len-1] == '0' && len > 0) len--;
4325 version = savepvn(tbuf, len);
4328 else if ( (mg = SvVSTRING_mg(ver)) ) { /* already a v-string */
4329 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
4333 else /* must be a string or something like a string */
4335 version = savepv(SvPV_nolen(ver));
4338 s = scan_version(version, ver, qv);
4340 if(ckWARN(WARN_MISC))
4341 Perl_warner(aTHX_ packWARN(WARN_MISC),
4342 "Version string '%s' contains invalid data; "
4343 "ignoring: '%s'", version, s);
4351 Validates that the SV contains a valid version object.
4353 bool vverify(SV *vobj);
4355 Note that it only confirms the bare minimum structure (so as not to get
4356 confused by derived classes which may contain additional hash entries):
4360 =item * The SV contains a [reference to a] hash
4362 =item * The hash contains a "version" key
4364 =item * The "version" key has [a reference to] an AV as its value
4372 Perl_vverify(pTHX_ SV *vs)
4378 /* see if the appropriate elements exist */
4379 if ( SvTYPE(vs) == SVt_PVHV
4380 && hv_exists((HV*)vs, "version", 7)
4381 && (sv = SvRV(*hv_fetchs((HV*)vs, "version", FALSE)))
4382 && SvTYPE(sv) == SVt_PVAV )
4391 Accepts a version object and returns the normalized floating
4392 point representation. Call like:
4396 NOTE: you can pass either the object directly or the SV
4397 contained within the RV.
4403 Perl_vnumify(pTHX_ SV *vs)
4408 SV * const sv = newSV(0);
4414 Perl_croak(aTHX_ "Invalid version object");
4416 /* see if various flags exist */
4417 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4419 if ( hv_exists((HV*)vs, "width", 5 ) )
4420 width = SvIV(*hv_fetchs((HV*)vs, "width", FALSE));
4425 /* attempt to retrieve the version array */
4426 if ( !(av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE)) ) ) {
4438 digit = SvIV(*av_fetch(av, 0, 0));
4439 Perl_sv_setpvf(aTHX_ sv, "%d.", (int)PERL_ABS(digit));
4440 for ( i = 1 ; i < len ; i++ )
4442 digit = SvIV(*av_fetch(av, i, 0));
4444 const int denom = (width == 2 ? 10 : 100);
4445 const div_t term = div((int)PERL_ABS(digit),denom);
4446 Perl_sv_catpvf(aTHX_ sv, "%0*d_%d", width, term.quot, term.rem);
4449 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4455 digit = SvIV(*av_fetch(av, len, 0));
4456 if ( alpha && width == 3 ) /* alpha version */
4458 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4462 sv_catpvs(sv, "000");
4470 Accepts a version object and returns the normalized string
4471 representation. Call like:
4475 NOTE: you can pass either the object directly or the SV
4476 contained within the RV.
4482 Perl_vnormal(pTHX_ SV *vs)
4486 SV * const sv = newSV(0);
4492 Perl_croak(aTHX_ "Invalid version object");
4494 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4496 av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE));
4504 digit = SvIV(*av_fetch(av, 0, 0));
4505 Perl_sv_setpvf(aTHX_ sv, "v%"IVdf, (IV)digit);
4506 for ( i = 1 ; i < len ; i++ ) {
4507 digit = SvIV(*av_fetch(av, i, 0));
4508 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4513 /* handle last digit specially */
4514 digit = SvIV(*av_fetch(av, len, 0));
4516 Perl_sv_catpvf(aTHX_ sv, "_%"IVdf, (IV)digit);
4518 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4521 if ( len <= 2 ) { /* short version, must be at least three */
4522 for ( len = 2 - len; len != 0; len-- )
4529 =for apidoc vstringify
4531 In order to maintain maximum compatibility with earlier versions
4532 of Perl, this function will return either the floating point
4533 notation or the multiple dotted notation, depending on whether
4534 the original version contained 1 or more dots, respectively
4540 Perl_vstringify(pTHX_ SV *vs)
4546 Perl_croak(aTHX_ "Invalid version object");
4548 if ( hv_exists((HV *)vs, "qv", 2) )
4557 Version object aware cmp. Both operands must already have been
4558 converted into version objects.
4564 Perl_vcmp(pTHX_ SV *lhv, SV *rhv)
4567 bool lalpha = FALSE;
4568 bool ralpha = FALSE;
4577 if ( !vverify(lhv) )
4578 Perl_croak(aTHX_ "Invalid version object");
4580 if ( !vverify(rhv) )
4581 Perl_croak(aTHX_ "Invalid version object");
4583 /* get the left hand term */
4584 lav = (AV *)SvRV(*hv_fetchs((HV*)lhv, "version", FALSE));
4585 if ( hv_exists((HV*)lhv, "alpha", 5 ) )
4588 /* and the right hand term */
4589 rav = (AV *)SvRV(*hv_fetchs((HV*)rhv, "version", FALSE));
4590 if ( hv_exists((HV*)rhv, "alpha", 5 ) )
4598 while ( i <= m && retval == 0 )
4600 left = SvIV(*av_fetch(lav,i,0));
4601 right = SvIV(*av_fetch(rav,i,0));
4609 /* tiebreaker for alpha with identical terms */
4610 if ( retval == 0 && l == r && left == right && ( lalpha || ralpha ) )
4612 if ( lalpha && !ralpha )
4616 else if ( ralpha && !lalpha)
4622 if ( l != r && retval == 0 ) /* possible match except for trailing 0's */
4626 while ( i <= r && retval == 0 )
4628 if ( SvIV(*av_fetch(rav,i,0)) != 0 )
4629 retval = -1; /* not a match after all */
4635 while ( i <= l && retval == 0 )
4637 if ( SvIV(*av_fetch(lav,i,0)) != 0 )
4638 retval = +1; /* not a match after all */
4646 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
4647 # define EMULATE_SOCKETPAIR_UDP
4650 #ifdef EMULATE_SOCKETPAIR_UDP
4652 S_socketpair_udp (int fd[2]) {
4654 /* Fake a datagram socketpair using UDP to localhost. */
4655 int sockets[2] = {-1, -1};
4656 struct sockaddr_in addresses[2];
4658 Sock_size_t size = sizeof(struct sockaddr_in);
4659 unsigned short port;
4662 memset(&addresses, 0, sizeof(addresses));
4665 sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
4666 if (sockets[i] == -1)
4667 goto tidy_up_and_fail;
4669 addresses[i].sin_family = AF_INET;
4670 addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4671 addresses[i].sin_port = 0; /* kernel choses port. */
4672 if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
4673 sizeof(struct sockaddr_in)) == -1)
4674 goto tidy_up_and_fail;
4677 /* Now have 2 UDP sockets. Find out which port each is connected to, and
4678 for each connect the other socket to it. */
4681 if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
4683 goto tidy_up_and_fail;
4684 if (size != sizeof(struct sockaddr_in))
4685 goto abort_tidy_up_and_fail;
4686 /* !1 is 0, !0 is 1 */
4687 if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
4688 sizeof(struct sockaddr_in)) == -1)
4689 goto tidy_up_and_fail;
4692 /* Now we have 2 sockets connected to each other. I don't trust some other
4693 process not to have already sent a packet to us (by random) so send
4694 a packet from each to the other. */
4697 /* I'm going to send my own port number. As a short.
4698 (Who knows if someone somewhere has sin_port as a bitfield and needs
4699 this routine. (I'm assuming crays have socketpair)) */
4700 port = addresses[i].sin_port;
4701 got = PerlLIO_write(sockets[i], &port, sizeof(port));
4702 if (got != sizeof(port)) {
4704 goto tidy_up_and_fail;
4705 goto abort_tidy_up_and_fail;
4709 /* Packets sent. I don't trust them to have arrived though.
4710 (As I understand it Solaris TCP stack is multithreaded. Non-blocking
4711 connect to localhost will use a second kernel thread. In 2.6 the
4712 first thread running the connect() returns before the second completes,
4713 so EINPROGRESS> In 2.7 the improved stack is faster and connect()
4714 returns 0. Poor programs have tripped up. One poor program's authors'
4715 had a 50-1 reverse stock split. Not sure how connected these were.)
4716 So I don't trust someone not to have an unpredictable UDP stack.
4720 struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
4721 int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
4725 FD_SET((unsigned int)sockets[0], &rset);
4726 FD_SET((unsigned int)sockets[1], &rset);
4728 got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
4729 if (got != 2 || !FD_ISSET(sockets[0], &rset)
4730 || !FD_ISSET(sockets[1], &rset)) {
4731 /* I hope this is portable and appropriate. */
4733 goto tidy_up_and_fail;
4734 goto abort_tidy_up_and_fail;
4738 /* And the paranoia department even now doesn't trust it to have arrive
4739 (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
4741 struct sockaddr_in readfrom;
4742 unsigned short buffer[2];
4747 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4748 sizeof(buffer), MSG_DONTWAIT,
4749 (struct sockaddr *) &readfrom, &size);
4751 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4753 (struct sockaddr *) &readfrom, &size);
4757 goto tidy_up_and_fail;
4758 if (got != sizeof(port)
4759 || size != sizeof(struct sockaddr_in)
4760 /* Check other socket sent us its port. */
4761 || buffer[0] != (unsigned short) addresses[!i].sin_port
4762 /* Check kernel says we got the datagram from that socket */
4763 || readfrom.sin_family != addresses[!i].sin_family
4764 || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
4765 || readfrom.sin_port != addresses[!i].sin_port)
4766 goto abort_tidy_up_and_fail;
4769 /* My caller (my_socketpair) has validated that this is non-NULL */
4772 /* I hereby declare this connection open. May God bless all who cross
4776 abort_tidy_up_and_fail:
4777 errno = ECONNABORTED;
4780 const int save_errno = errno;
4781 if (sockets[0] != -1)
4782 PerlLIO_close(sockets[0]);
4783 if (sockets[1] != -1)
4784 PerlLIO_close(sockets[1]);
4789 #endif /* EMULATE_SOCKETPAIR_UDP */
4791 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
4793 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4794 /* Stevens says that family must be AF_LOCAL, protocol 0.
4795 I'm going to enforce that, then ignore it, and use TCP (or UDP). */
4800 struct sockaddr_in listen_addr;
4801 struct sockaddr_in connect_addr;
4806 || family != AF_UNIX
4809 errno = EAFNOSUPPORT;
4817 #ifdef EMULATE_SOCKETPAIR_UDP
4818 if (type == SOCK_DGRAM)
4819 return S_socketpair_udp(fd);
4822 listener = PerlSock_socket(AF_INET, type, 0);
4825 memset(&listen_addr, 0, sizeof(listen_addr));
4826 listen_addr.sin_family = AF_INET;
4827 listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4828 listen_addr.sin_port = 0; /* kernel choses port. */
4829 if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
4830 sizeof(listen_addr)) == -1)
4831 goto tidy_up_and_fail;
4832 if (PerlSock_listen(listener, 1) == -1)
4833 goto tidy_up_and_fail;
4835 connector = PerlSock_socket(AF_INET, type, 0);
4836 if (connector == -1)
4837 goto tidy_up_and_fail;
4838 /* We want to find out the port number to connect to. */
4839 size = sizeof(connect_addr);
4840 if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
4842 goto tidy_up_and_fail;
4843 if (size != sizeof(connect_addr))
4844 goto abort_tidy_up_and_fail;
4845 if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
4846 sizeof(connect_addr)) == -1)
4847 goto tidy_up_and_fail;
4849 size = sizeof(listen_addr);
4850 acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
4853 goto tidy_up_and_fail;
4854 if (size != sizeof(listen_addr))
4855 goto abort_tidy_up_and_fail;
4856 PerlLIO_close(listener);
4857 /* Now check we are talking to ourself by matching port and host on the
4859 if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
4861 goto tidy_up_and_fail;
4862 if (size != sizeof(connect_addr)
4863 || listen_addr.sin_family != connect_addr.sin_family
4864 || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
4865 || listen_addr.sin_port != connect_addr.sin_port) {
4866 goto abort_tidy_up_and_fail;
4872 abort_tidy_up_and_fail:
4874 errno = ECONNABORTED; /* This would be the standard thing to do. */
4876 # ifdef ECONNREFUSED
4877 errno = ECONNREFUSED; /* E.g. Symbian does not have ECONNABORTED. */
4879 errno = ETIMEDOUT; /* Desperation time. */
4884 const int save_errno = errno;
4886 PerlLIO_close(listener);
4887 if (connector != -1)
4888 PerlLIO_close(connector);
4890 PerlLIO_close(acceptor);
4896 /* In any case have a stub so that there's code corresponding
4897 * to the my_socketpair in global.sym. */
4899 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4900 #ifdef HAS_SOCKETPAIR
4901 return socketpair(family, type, protocol, fd);
4910 =for apidoc sv_nosharing
4912 Dummy routine which "shares" an SV when there is no sharing module present.
4913 Or "locks" it. Or "unlocks" it. In other words, ignores its single SV argument.
4914 Exists to avoid test for a NULL function pointer and because it could
4915 potentially warn under some level of strict-ness.
4921 Perl_sv_nosharing(pTHX_ SV *sv)
4923 PERL_UNUSED_CONTEXT;
4924 PERL_UNUSED_ARG(sv);
4928 Perl_parse_unicode_opts(pTHX_ const char **popt)
4930 const char *p = *popt;
4935 opt = (U32) atoi(p);
4938 if (*p && *p != '\n' && *p != '\r')
4939 Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
4944 case PERL_UNICODE_STDIN:
4945 opt |= PERL_UNICODE_STDIN_FLAG; break;
4946 case PERL_UNICODE_STDOUT:
4947 opt |= PERL_UNICODE_STDOUT_FLAG; break;
4948 case PERL_UNICODE_STDERR:
4949 opt |= PERL_UNICODE_STDERR_FLAG; break;
4950 case PERL_UNICODE_STD:
4951 opt |= PERL_UNICODE_STD_FLAG; break;
4952 case PERL_UNICODE_IN:
4953 opt |= PERL_UNICODE_IN_FLAG; break;
4954 case PERL_UNICODE_OUT:
4955 opt |= PERL_UNICODE_OUT_FLAG; break;
4956 case PERL_UNICODE_INOUT:
4957 opt |= PERL_UNICODE_INOUT_FLAG; break;
4958 case PERL_UNICODE_LOCALE:
4959 opt |= PERL_UNICODE_LOCALE_FLAG; break;
4960 case PERL_UNICODE_ARGV:
4961 opt |= PERL_UNICODE_ARGV_FLAG; break;
4962 case PERL_UNICODE_UTF8CACHEASSERT:
4963 opt |= PERL_UNICODE_UTF8CACHEASSERT_FLAG; break;
4965 if (*p != '\n' && *p != '\r')
4967 "Unknown Unicode option letter '%c'", *p);
4973 opt = PERL_UNICODE_DEFAULT_FLAGS;
4975 if (opt & ~PERL_UNICODE_ALL_FLAGS)
4976 Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
4977 (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
4989 * This is really just a quick hack which grabs various garbage
4990 * values. It really should be a real hash algorithm which
4991 * spreads the effect of every input bit onto every output bit,
4992 * if someone who knows about such things would bother to write it.
4993 * Might be a good idea to add that function to CORE as well.
4994 * No numbers below come from careful analysis or anything here,
4995 * except they are primes and SEED_C1 > 1E6 to get a full-width
4996 * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
4997 * probably be bigger too.
5000 # define SEED_C1 1000003
5001 #define SEED_C4 73819
5003 # define SEED_C1 25747
5004 #define SEED_C4 20639
5008 #define SEED_C5 26107
5010 #ifndef PERL_NO_DEV_RANDOM
5015 # include <starlet.h>