3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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)
261 MEM_SIZE total_size = 0;
263 /* Even though calloc() for zero bytes is strange, be robust. */
264 if (size && (count <= MEM_SIZE_MAX / size))
265 total_size = size * count;
267 Perl_croak_nocontext(PL_memory_wrap);
268 #ifdef PERL_TRACK_MEMPOOL
269 if (sTHX <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
272 Perl_croak_nocontext(PL_memory_wrap);
275 if (total_size > 0xffff) {
276 PerlIO_printf(Perl_error_log,
277 "Allocation too large: %lx\n", total_size) FLUSH;
280 #endif /* HAS_64K_LIMIT */
282 if ((long)size < 0 || (long)count < 0)
283 Perl_croak_nocontext("panic: calloc");
285 #ifdef PERL_TRACK_MEMPOOL
286 /* Have to use malloc() because we've added some space for our tracking
288 /* malloc(0) is non-portable. */
289 ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1);
291 /* Use calloc() because it might save a memset() if the memory is fresh
292 and clean from the OS. */
294 ptr = (Malloc_t)PerlMem_calloc(count, size);
295 else /* calloc(0) is non-portable. */
296 ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1);
298 PERL_ALLOC_CHECK(ptr);
299 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)total_size));
301 #ifdef PERL_TRACK_MEMPOOL
303 struct perl_memory_debug_header *const header
304 = (struct perl_memory_debug_header *)ptr;
306 memset((void*)ptr, 0, total_size);
307 header->interpreter = aTHX;
308 /* Link us into the list. */
309 header->prev = &PL_memory_debug_header;
310 header->next = PL_memory_debug_header.next;
311 PL_memory_debug_header.next = header;
312 header->next->prev = header;
314 header->size = total_size;
316 ptr = (Malloc_t)((char*)ptr+sTHX);
323 return write_no_mem();
326 /* These must be defined when not using Perl's malloc for binary
331 Malloc_t Perl_malloc (MEM_SIZE nbytes)
334 return (Malloc_t)PerlMem_malloc(nbytes);
337 Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
340 return (Malloc_t)PerlMem_calloc(elements, size);
343 Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
346 return (Malloc_t)PerlMem_realloc(where, nbytes);
349 Free_t Perl_mfree (Malloc_t where)
357 /* copy a string up to some (non-backslashed) delimiter, if any */
360 Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
365 for (tolen = 0; from < fromend; from++, tolen++) {
367 if (from[1] != delim) {
374 else if (*from == delim)
385 /* return ptr to little string in big string, NULL if not found */
386 /* This routine was donated by Corey Satten. */
389 Perl_instr(pTHX_ register const char *big, register const char *little)
400 register const char *s, *x;
403 for (x=big,s=little; *s; /**/ ) {
414 return (char*)(big-1);
419 /* same as instr but allow embedded nulls */
422 Perl_ninstr(pTHX_ const char *big, const char *bigend, const char *little, const char *lend)
428 char first = *little++;
430 bigend -= lend - little;
432 while (big <= bigend) {
433 if (*big++ == first) {
434 for (x=big,s=little; s < lend; x++,s++) {
438 return (char*)(big-1);
445 /* reverse of the above--find last substring */
448 Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
450 register const char *bigbeg;
451 register const I32 first = *little;
452 register const char * const littleend = lend;
455 if (little >= littleend)
456 return (char*)bigend;
458 big = bigend - (littleend - little++);
459 while (big >= bigbeg) {
460 register const char *s, *x;
463 for (x=big+2,s=little; s < littleend; /**/ ) {
472 return (char*)(big+1);
477 /* As a space optimization, we do not compile tables for strings of length
478 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
479 special-cased in fbm_instr().
481 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
484 =head1 Miscellaneous Functions
486 =for apidoc fbm_compile
488 Analyses the string in order to make fast searches on it using fbm_instr()
489 -- the Boyer-Moore algorithm.
495 Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
498 register const U8 *s;
504 if (flags & FBMcf_TAIL) {
505 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
506 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
507 if (mg && mg->mg_len >= 0)
510 s = (U8*)SvPV_force_mutable(sv, len);
511 if (len == 0) /* TAIL might be on a zero-length string. */
513 SvUPGRADE(sv, SVt_PVGV);
518 const unsigned char *sb;
519 const U8 mlen = (len>255) ? 255 : (U8)len;
522 Sv_Grow(sv, len + 256 + PERL_FBM_TABLE_OFFSET);
524 = (unsigned char*)(SvPVX_mutable(sv) + len + PERL_FBM_TABLE_OFFSET);
525 s = table - 1 - PERL_FBM_TABLE_OFFSET; /* last char */
526 memset((void*)table, mlen, 256);
528 sb = s - mlen + 1; /* first char (maybe) */
530 if (table[*s] == mlen)
535 Sv_Grow(sv, len + PERL_FBM_TABLE_OFFSET);
537 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
539 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
540 for (i = 0; i < len; i++) {
541 if (PL_freq[s[i]] < frequency) {
543 frequency = PL_freq[s[i]];
546 BmFLAGS(sv) = (U8)flags;
547 BmRARE(sv) = s[rarest];
548 BmPREVIOUS(sv) = rarest;
549 BmUSEFUL(sv) = 100; /* Initial value */
550 if (flags & FBMcf_TAIL)
552 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %lu\n",
553 BmRARE(sv),(unsigned long)BmPREVIOUS(sv)));
556 /* If SvTAIL(littlestr), it has a fake '\n' at end. */
557 /* If SvTAIL is actually due to \Z or \z, this gives false positives
561 =for apidoc fbm_instr
563 Returns the location of the SV in the string delimited by C<str> and
564 C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
565 does not have to be fbm_compiled, but the search will not be as fast
572 Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
574 register unsigned char *s;
576 register const unsigned char *little
577 = (const unsigned char *)SvPV_const(littlestr,l);
578 register STRLEN littlelen = l;
579 register const I32 multiline = flags & FBMrf_MULTILINE;
581 if ((STRLEN)(bigend - big) < littlelen) {
582 if ( SvTAIL(littlestr)
583 && ((STRLEN)(bigend - big) == littlelen - 1)
585 || (*big == *little &&
586 memEQ((char *)big, (char *)little, littlelen - 1))))
591 if (littlelen <= 2) { /* Special-cased */
593 if (littlelen == 1) {
594 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
595 /* Know that bigend != big. */
596 if (bigend[-1] == '\n')
597 return (char *)(bigend - 1);
598 return (char *) bigend;
606 if (SvTAIL(littlestr))
607 return (char *) bigend;
611 return (char*)big; /* Cannot be SvTAIL! */
614 if (SvTAIL(littlestr) && !multiline) {
615 if (bigend[-1] == '\n' && bigend[-2] == *little)
616 return (char*)bigend - 2;
617 if (bigend[-1] == *little)
618 return (char*)bigend - 1;
622 /* This should be better than FBM if c1 == c2, and almost
623 as good otherwise: maybe better since we do less indirection.
624 And we save a lot of memory by caching no table. */
625 const unsigned char c1 = little[0];
626 const unsigned char c2 = little[1];
631 while (s <= bigend) {
641 goto check_1char_anchor;
652 goto check_1char_anchor;
655 while (s <= bigend) {
660 goto check_1char_anchor;
669 check_1char_anchor: /* One char and anchor! */
670 if (SvTAIL(littlestr) && (*bigend == *little))
671 return (char *)bigend; /* bigend is already decremented. */
674 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
675 s = bigend - littlelen;
676 if (s >= big && bigend[-1] == '\n' && *s == *little
677 /* Automatically of length > 2 */
678 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
680 return (char*)s; /* how sweet it is */
683 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
685 return (char*)s + 1; /* how sweet it is */
689 if (!SvVALID(littlestr)) {
690 char * const b = ninstr((char*)big,(char*)bigend,
691 (char*)little, (char*)little + littlelen);
693 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
694 /* Chop \n from littlestr: */
695 s = bigend - littlelen + 1;
697 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
707 if (littlelen > (STRLEN)(bigend - big))
711 register const unsigned char * const table
712 = little + littlelen + PERL_FBM_TABLE_OFFSET;
713 register const unsigned char *oldlittle;
715 --littlelen; /* Last char found by table lookup */
718 little += littlelen; /* last char */
724 if ((tmp = table[*s])) {
725 if ((s += tmp) < bigend)
729 else { /* less expensive than calling strncmp() */
730 register unsigned char * const olds = s;
735 if (*--s == *--little)
737 s = olds + 1; /* here we pay the price for failure */
739 if (s < bigend) /* fake up continue to outer loop */
748 && (BmFLAGS(littlestr) & FBMcf_TAIL)
749 && memEQ((char *)(bigend - littlelen),
750 (char *)(oldlittle - littlelen), littlelen) )
751 return (char*)bigend - littlelen;
756 /* start_shift, end_shift are positive quantities which give offsets
757 of ends of some substring of bigstr.
758 If "last" we want the last occurrence.
759 old_posp is the way of communication between consequent calls if
760 the next call needs to find the .
761 The initial *old_posp should be -1.
763 Note that we take into account SvTAIL, so one can get extra
764 optimizations if _ALL flag is set.
767 /* If SvTAIL is actually due to \Z or \z, this gives false positives
768 if PL_multiline. In fact if !PL_multiline the authoritative answer
769 is not supported yet. */
772 Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
775 register const unsigned char *big;
777 register I32 previous;
779 register const unsigned char *little;
780 register I32 stop_pos;
781 register const unsigned char *littleend;
784 assert(SvTYPE(littlestr) == SVt_PVGV);
785 assert(SvVALID(littlestr));
788 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
789 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
791 if ( BmRARE(littlestr) == '\n'
792 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
793 little = (const unsigned char *)(SvPVX_const(littlestr));
794 littleend = little + SvCUR(littlestr);
801 little = (const unsigned char *)(SvPVX_const(littlestr));
802 littleend = little + SvCUR(littlestr);
804 /* The value of pos we can start at: */
805 previous = BmPREVIOUS(littlestr);
806 big = (const unsigned char *)(SvPVX_const(bigstr));
807 /* The value of pos we can stop at: */
808 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
809 if (previous + start_shift > stop_pos) {
811 stop_pos does not include SvTAIL in the count, so this check is incorrect
812 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
815 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
820 while (pos < previous + start_shift) {
821 if (!(pos += PL_screamnext[pos]))
826 register const unsigned char *s, *x;
827 if (pos >= stop_pos) break;
828 if (big[pos] != first)
830 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
836 if (s == littleend) {
838 if (!last) return (char *)(big+pos);
841 } while ( pos += PL_screamnext[pos] );
843 return (char *)(big+(*old_posp));
845 if (!SvTAIL(littlestr) || (end_shift > 0))
847 /* Ignore the trailing "\n". This code is not microoptimized */
848 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
849 stop_pos = littleend - little; /* Actual littlestr len */
854 && ((stop_pos == 1) ||
855 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
861 Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
863 register const U8 *a = (const U8 *)s1;
864 register const U8 *b = (const U8 *)s2;
868 if (*a != *b && *a != PL_fold[*b])
876 Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
879 register const U8 *a = (const U8 *)s1;
880 register const U8 *b = (const U8 *)s2;
884 if (*a != *b && *a != PL_fold_locale[*b])
891 /* copy a string to a safe spot */
894 =head1 Memory Management
898 Perl's version of C<strdup()>. Returns a pointer to a newly allocated
899 string which is a duplicate of C<pv>. The size of the string is
900 determined by C<strlen()>. The memory allocated for the new string can
901 be freed with the C<Safefree()> function.
907 Perl_savepv(pTHX_ const char *pv)
914 const STRLEN pvlen = strlen(pv)+1;
915 Newx(newaddr, pvlen, char);
916 return (char*)memcpy(newaddr, pv, pvlen);
920 /* same thing but with a known length */
925 Perl's version of what C<strndup()> would be if it existed. Returns a
926 pointer to a newly allocated string which is a duplicate of the first
927 C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
928 the new string can be freed with the C<Safefree()> function.
934 Perl_savepvn(pTHX_ const char *pv, register I32 len)
936 register char *newaddr;
939 Newx(newaddr,len+1,char);
940 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
942 /* might not be null terminated */
944 return (char *) CopyD(pv,newaddr,len,char);
947 return (char *) ZeroD(newaddr,len+1,char);
952 =for apidoc savesharedpv
954 A version of C<savepv()> which allocates the duplicate string in memory
955 which is shared between threads.
960 Perl_savesharedpv(pTHX_ const char *pv)
962 register char *newaddr;
967 pvlen = strlen(pv)+1;
968 newaddr = (char*)PerlMemShared_malloc(pvlen);
970 return write_no_mem();
972 return (char*)memcpy(newaddr, pv, pvlen);
976 =for apidoc savesharedpvn
978 A version of C<savepvn()> which allocates the duplicate string in memory
979 which is shared between threads. (With the specific difference that a NULL
980 pointer is not acceptable)
985 Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
987 char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
990 return write_no_mem();
993 return (char*)memcpy(newaddr, pv, len);
999 A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
1000 the passed in SV using C<SvPV()>
1006 Perl_savesvpv(pTHX_ SV *sv)
1009 const char * const pv = SvPV_const(sv, len);
1010 register char *newaddr;
1013 Newx(newaddr,len,char);
1014 return (char *) CopyD(pv,newaddr,len,char);
1018 /* the SV for Perl_form() and mess() is not kept in an arena */
1028 return sv_2mortal(newSVpvs(""));
1033 /* Create as PVMG now, to avoid any upgrading later */
1035 Newxz(any, 1, XPVMG);
1036 SvFLAGS(sv) = SVt_PVMG;
1037 SvANY(sv) = (void*)any;
1039 SvREFCNT(sv) = 1 << 30; /* practically infinite */
1044 #if defined(PERL_IMPLICIT_CONTEXT)
1046 Perl_form_nocontext(const char* pat, ...)
1051 va_start(args, pat);
1052 retval = vform(pat, &args);
1056 #endif /* PERL_IMPLICIT_CONTEXT */
1059 =head1 Miscellaneous Functions
1062 Takes a sprintf-style format pattern and conventional
1063 (non-SV) arguments and returns the formatted string.
1065 (char *) Perl_form(pTHX_ const char* pat, ...)
1067 can be used any place a string (char *) is required:
1069 char * s = Perl_form("%d.%d",major,minor);
1071 Uses a single private buffer so if you want to format several strings you
1072 must explicitly copy the earlier strings away (and free the copies when you
1079 Perl_form(pTHX_ const char* pat, ...)
1083 va_start(args, pat);
1084 retval = vform(pat, &args);
1090 Perl_vform(pTHX_ const char *pat, va_list *args)
1092 SV * const sv = mess_alloc();
1093 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1097 #if defined(PERL_IMPLICIT_CONTEXT)
1099 Perl_mess_nocontext(const char *pat, ...)
1104 va_start(args, pat);
1105 retval = vmess(pat, &args);
1109 #endif /* PERL_IMPLICIT_CONTEXT */
1112 Perl_mess(pTHX_ const char *pat, ...)
1116 va_start(args, pat);
1117 retval = vmess(pat, &args);
1123 S_closest_cop(pTHX_ const COP *cop, const OP *o)
1126 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1128 if (!o || o == PL_op)
1131 if (o->op_flags & OPf_KIDS) {
1133 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1136 /* If the OP_NEXTSTATE has been optimised away we can still use it
1137 * the get the file and line number. */
1139 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
1140 cop = (const COP *)kid;
1142 /* Keep searching, and return when we've found something. */
1144 new_cop = closest_cop(cop, kid);
1150 /* Nothing found. */
1156 Perl_vmess(pTHX_ const char *pat, va_list *args)
1159 SV * const sv = mess_alloc();
1161 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1162 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
1164 * Try and find the file and line for PL_op. This will usually be
1165 * PL_curcop, but it might be a cop that has been optimised away. We
1166 * can try to find such a cop by searching through the optree starting
1167 * from the sibling of PL_curcop.
1170 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
1175 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
1176 OutCopFILE(cop), (IV)CopLINE(cop));
1177 /* Seems that GvIO() can be untrustworthy during global destruction. */
1178 if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO)
1179 && IoLINES(GvIOp(PL_last_in_gv)))
1181 const bool line_mode = (RsSIMPLE(PL_rs) &&
1182 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
1183 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
1184 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
1185 line_mode ? "line" : "chunk",
1186 (IV)IoLINES(GvIOp(PL_last_in_gv)));
1189 sv_catpvs(sv, " during global destruction");
1190 sv_catpvs(sv, ".\n");
1196 Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1202 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1203 && (io = GvIO(PL_stderrgv))
1204 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
1211 SAVESPTR(PL_stderrgv);
1214 PUSHSTACKi(PERLSI_MAGIC);
1218 PUSHs(SvTIED_obj((SV*)io, mg));
1219 PUSHs(sv_2mortal(newSVpvn(message, msglen)));
1221 call_method("PRINT", G_SCALAR);
1229 /* SFIO can really mess with your errno */
1230 const int e = errno;
1232 PerlIO * const serr = Perl_error_log;
1234 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1235 (void)PerlIO_flush(serr);
1242 /* Common code used by vcroak, vdie, vwarn and vwarner */
1245 S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
1251 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1252 /* sv_2cv might call Perl_croak() or Perl_warner() */
1253 SV * const oldhook = *hook;
1260 cv = sv_2cv(oldhook, &stash, &gv, 0);
1262 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1272 if (warn || message) {
1273 msg = newSVpvn(message, msglen);
1274 SvFLAGS(msg) |= utf8;
1282 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
1286 call_sv((SV*)cv, G_DISCARD);
1295 S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1299 const char *message;
1302 SV * const msv = vmess(pat, args);
1303 if (PL_errors && SvCUR(PL_errors)) {
1304 sv_catsv(PL_errors, msv);
1305 message = SvPV_const(PL_errors, *msglen);
1306 SvCUR_set(PL_errors, 0);
1309 message = SvPV_const(msv,*msglen);
1310 *utf8 = SvUTF8(msv);
1316 DEBUG_S(PerlIO_printf(Perl_debug_log,
1317 "%p: die/croak: message = %s\ndiehook = %p\n",
1318 (void*)thr, message, (void*)PL_diehook));
1320 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
1326 Perl_vdie(pTHX_ const char* pat, va_list *args)
1329 const char *message;
1330 const int was_in_eval = PL_in_eval;
1334 DEBUG_S(PerlIO_printf(Perl_debug_log,
1335 "%p: die: curstack = %p, mainstack = %p\n",
1336 (void*)thr, (void*)PL_curstack, (void*)PL_mainstack));
1338 message = vdie_croak_common(pat, args, &msglen, &utf8);
1340 PL_restartop = die_where(message, msglen);
1341 SvFLAGS(ERRSV) |= utf8;
1342 DEBUG_S(PerlIO_printf(Perl_debug_log,
1343 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
1344 (void*)thr, (void*)PL_restartop, was_in_eval, (void*)PL_top_env));
1345 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
1347 return PL_restartop;
1350 #if defined(PERL_IMPLICIT_CONTEXT)
1352 Perl_die_nocontext(const char* pat, ...)
1357 va_start(args, pat);
1358 o = vdie(pat, &args);
1362 #endif /* PERL_IMPLICIT_CONTEXT */
1365 Perl_die(pTHX_ const char* pat, ...)
1369 va_start(args, pat);
1370 o = vdie(pat, &args);
1376 Perl_vcroak(pTHX_ const char* pat, va_list *args)
1379 const char *message;
1383 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
1386 PL_restartop = die_where(message, msglen);
1387 SvFLAGS(ERRSV) |= utf8;
1391 message = SvPVx_const(ERRSV, msglen);
1393 write_to_stderr(message, msglen);
1397 #if defined(PERL_IMPLICIT_CONTEXT)
1399 Perl_croak_nocontext(const char *pat, ...)
1403 va_start(args, pat);
1408 #endif /* PERL_IMPLICIT_CONTEXT */
1411 =head1 Warning and Dieing
1415 This is the XSUB-writer's interface to Perl's C<die> function.
1416 Normally call this function the same way you call the C C<printf>
1417 function. Calling C<croak> returns control directly to Perl,
1418 sidestepping the normal C order of execution. See C<warn>.
1420 If you want to throw an exception object, assign the object to
1421 C<$@> and then pass C<NULL> to croak():
1423 errsv = get_sv("@", TRUE);
1424 sv_setsv(errsv, exception_object);
1431 Perl_croak(pTHX_ const char *pat, ...)
1434 va_start(args, pat);
1441 Perl_vwarn(pTHX_ const char* pat, va_list *args)
1445 SV * const msv = vmess(pat, args);
1446 const I32 utf8 = SvUTF8(msv);
1447 const char * const message = SvPV_const(msv, msglen);
1450 if (vdie_common(message, msglen, utf8, TRUE))
1454 write_to_stderr(message, msglen);
1457 #if defined(PERL_IMPLICIT_CONTEXT)
1459 Perl_warn_nocontext(const char *pat, ...)
1463 va_start(args, pat);
1467 #endif /* PERL_IMPLICIT_CONTEXT */
1472 This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1473 function the same way you call the C C<printf> function. See C<croak>.
1479 Perl_warn(pTHX_ const char *pat, ...)
1482 va_start(args, pat);
1487 #if defined(PERL_IMPLICIT_CONTEXT)
1489 Perl_warner_nocontext(U32 err, const char *pat, ...)
1493 va_start(args, pat);
1494 vwarner(err, pat, &args);
1497 #endif /* PERL_IMPLICIT_CONTEXT */
1500 Perl_warner(pTHX_ U32 err, const char* pat,...)
1503 va_start(args, pat);
1504 vwarner(err, pat, &args);
1509 Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1512 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
1513 SV * const msv = vmess(pat, args);
1515 const char * const message = SvPV_const(msv, msglen);
1516 const I32 utf8 = SvUTF8(msv);
1520 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
1523 PL_restartop = die_where(message, msglen);
1524 SvFLAGS(ERRSV) |= utf8;
1527 write_to_stderr(message, msglen);
1531 Perl_vwarn(aTHX_ pat, args);
1535 /* implements the ckWARN? macros */
1538 Perl_ckwarn(pTHX_ U32 w)
1544 && PL_curcop->cop_warnings != pWARN_NONE
1546 PL_curcop->cop_warnings == pWARN_ALL
1547 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1548 || (unpackWARN2(w) &&
1549 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1550 || (unpackWARN3(w) &&
1551 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1552 || (unpackWARN4(w) &&
1553 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1558 isLEXWARN_off && PL_dowarn & G_WARN_ON
1563 /* implements the ckWARN?_d macro */
1566 Perl_ckwarn_d(pTHX_ U32 w)
1571 || PL_curcop->cop_warnings == pWARN_ALL
1573 PL_curcop->cop_warnings != pWARN_NONE
1575 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1576 || (unpackWARN2(w) &&
1577 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1578 || (unpackWARN3(w) &&
1579 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1580 || (unpackWARN4(w) &&
1581 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1587 /* Set buffer=NULL to get a new one. */
1589 Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
1591 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
1592 PERL_UNUSED_CONTEXT;
1595 (specialWARN(buffer) ?
1596 PerlMemShared_malloc(len_wanted) :
1597 PerlMemShared_realloc(buffer, len_wanted));
1599 Copy(bits, (buffer + 1), size, char);
1603 /* since we've already done strlen() for both nam and val
1604 * we can use that info to make things faster than
1605 * sprintf(s, "%s=%s", nam, val)
1607 #define my_setenv_format(s, nam, nlen, val, vlen) \
1608 Copy(nam, s, nlen, char); \
1610 Copy(val, s+(nlen+1), vlen, char); \
1611 *(s+(nlen+1+vlen)) = '\0'
1613 #ifdef USE_ENVIRON_ARRAY
1614 /* VMS' my_setenv() is in vms.c */
1615 #if !defined(WIN32) && !defined(NETWARE)
1617 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1621 /* only parent thread can modify process environment */
1622 if (PL_curinterp == aTHX)
1625 #ifndef PERL_USE_SAFE_PUTENV
1626 if (!PL_use_safe_putenv) {
1627 /* most putenv()s leak, so we manipulate environ directly */
1628 register I32 i=setenv_getix(nam); /* where does it go? */
1631 if (environ == PL_origenviron) { /* need we copy environment? */
1637 while (environ[max])
1639 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1640 for (j=0; j<max; j++) { /* copy environment */
1641 const int len = strlen(environ[j]);
1642 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1643 Copy(environ[j], tmpenv[j], len+1, char);
1646 environ = tmpenv; /* tell exec where it is now */
1649 safesysfree(environ[i]);
1650 while (environ[i]) {
1651 environ[i] = environ[i+1];
1656 if (!environ[i]) { /* does not exist yet */
1657 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1658 environ[i+1] = NULL; /* make sure it's null terminated */
1661 safesysfree(environ[i]);
1665 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1666 /* all that work just for this */
1667 my_setenv_format(environ[i], nam, nlen, val, vlen);
1670 # if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
1671 # if defined(HAS_UNSETENV)
1673 (void)unsetenv(nam);
1675 (void)setenv(nam, val, 1);
1677 # else /* ! HAS_UNSETENV */
1678 (void)setenv(nam, val, 1);
1679 # endif /* HAS_UNSETENV */
1681 # if defined(HAS_UNSETENV)
1683 (void)unsetenv(nam);
1685 const int nlen = strlen(nam);
1686 const int vlen = strlen(val);
1687 char * const new_env =
1688 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1689 my_setenv_format(new_env, nam, nlen, val, vlen);
1690 (void)putenv(new_env);
1692 # else /* ! HAS_UNSETENV */
1694 const int nlen = strlen(nam);
1700 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1701 /* all that work just for this */
1702 my_setenv_format(new_env, nam, nlen, val, vlen);
1703 (void)putenv(new_env);
1704 # endif /* HAS_UNSETENV */
1705 # endif /* __CYGWIN__ */
1706 #ifndef PERL_USE_SAFE_PUTENV
1712 #else /* WIN32 || NETWARE */
1715 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1718 register char *envstr;
1719 const int nlen = strlen(nam);
1726 Newx(envstr, nlen+vlen+2, char);
1727 my_setenv_format(envstr, nam, nlen, val, vlen);
1728 (void)PerlEnv_putenv(envstr);
1732 #endif /* WIN32 || NETWARE */
1736 Perl_setenv_getix(pTHX_ const char *nam)
1739 register const I32 len = strlen(nam);
1740 PERL_UNUSED_CONTEXT;
1742 for (i = 0; environ[i]; i++) {
1745 strnicmp(environ[i],nam,len) == 0
1747 strnEQ(environ[i],nam,len)
1749 && environ[i][len] == '=')
1750 break; /* strnEQ must come first to avoid */
1751 } /* potential SEGV's */
1754 #endif /* !PERL_MICRO */
1756 #endif /* !VMS && !EPOC*/
1758 #ifdef UNLINK_ALL_VERSIONS
1760 Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
1764 while (PerlLIO_unlink(f) >= 0)
1766 return retries ? 0 : -1;
1770 /* this is a drop-in replacement for bcopy() */
1771 #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
1773 Perl_my_bcopy(register const char *from,register char *to,register I32 len)
1775 char * const retval = to;
1777 if (from - to >= 0) {
1785 *(--to) = *(--from);
1791 /* this is a drop-in replacement for memset() */
1794 Perl_my_memset(register char *loc, register I32 ch, register I32 len)
1796 char * const retval = loc;
1804 /* this is a drop-in replacement for bzero() */
1805 #if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
1807 Perl_my_bzero(register char *loc, register I32 len)
1809 char * const retval = loc;
1817 /* this is a drop-in replacement for memcmp() */
1818 #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
1820 Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
1822 register const U8 *a = (const U8 *)s1;
1823 register const U8 *b = (const U8 *)s2;
1827 if ((tmp = *a++ - *b++))
1832 #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
1836 #ifdef USE_CHAR_VSPRINTF
1841 vsprintf(char *dest, const char *pat, char *args)
1845 fakebuf._ptr = dest;
1846 fakebuf._cnt = 32767;
1850 fakebuf._flag = _IOWRT|_IOSTRG;
1851 _doprnt(pat, args, &fakebuf); /* what a kludge */
1852 (void)putc('\0', &fakebuf);
1853 #ifdef USE_CHAR_VSPRINTF
1856 return 0; /* perl doesn't use return value */
1860 #endif /* HAS_VPRINTF */
1863 #if BYTEORDER != 0x4321
1865 Perl_my_swap(pTHX_ short s)
1867 #if (BYTEORDER & 1) == 0
1870 result = ((s & 255) << 8) + ((s >> 8) & 255);
1878 Perl_my_htonl(pTHX_ long l)
1882 char c[sizeof(long)];
1885 #if BYTEORDER == 0x1234
1886 u.c[0] = (l >> 24) & 255;
1887 u.c[1] = (l >> 16) & 255;
1888 u.c[2] = (l >> 8) & 255;
1892 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1893 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1898 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1899 u.c[o & 0xf] = (l >> s) & 255;
1907 Perl_my_ntohl(pTHX_ long l)
1911 char c[sizeof(long)];
1914 #if BYTEORDER == 0x1234
1915 u.c[0] = (l >> 24) & 255;
1916 u.c[1] = (l >> 16) & 255;
1917 u.c[2] = (l >> 8) & 255;
1921 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1922 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1929 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1930 l |= (u.c[o & 0xf] & 255) << s;
1937 #endif /* BYTEORDER != 0x4321 */
1941 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1942 * If these functions are defined,
1943 * the BYTEORDER is neither 0x1234 nor 0x4321.
1944 * However, this is not assumed.
1948 #define HTOLE(name,type) \
1950 name (register type n) \
1954 char c[sizeof(type)]; \
1957 register U32 s = 0; \
1958 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1959 u.c[i] = (n >> s) & 0xFF; \
1964 #define LETOH(name,type) \
1966 name (register type n) \
1970 char c[sizeof(type)]; \
1973 register U32 s = 0; \
1976 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1977 n |= ((type)(u.c[i] & 0xFF)) << s; \
1983 * Big-endian byte order functions.
1986 #define HTOBE(name,type) \
1988 name (register type n) \
1992 char c[sizeof(type)]; \
1995 register U32 s = 8*(sizeof(u.c)-1); \
1996 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1997 u.c[i] = (n >> s) & 0xFF; \
2002 #define BETOH(name,type) \
2004 name (register type n) \
2008 char c[sizeof(type)]; \
2011 register U32 s = 8*(sizeof(u.c)-1); \
2014 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2015 n |= ((type)(u.c[i] & 0xFF)) << s; \
2021 * If we just can't do it...
2024 #define NOT_AVAIL(name,type) \
2026 name (register type n) \
2028 Perl_croak_nocontext(#name "() not available"); \
2029 return n; /* not reached */ \
2033 #if defined(HAS_HTOVS) && !defined(htovs)
2036 #if defined(HAS_HTOVL) && !defined(htovl)
2039 #if defined(HAS_VTOHS) && !defined(vtohs)
2042 #if defined(HAS_VTOHL) && !defined(vtohl)
2046 #ifdef PERL_NEED_MY_HTOLE16
2048 HTOLE(Perl_my_htole16,U16)
2050 NOT_AVAIL(Perl_my_htole16,U16)
2053 #ifdef PERL_NEED_MY_LETOH16
2055 LETOH(Perl_my_letoh16,U16)
2057 NOT_AVAIL(Perl_my_letoh16,U16)
2060 #ifdef PERL_NEED_MY_HTOBE16
2062 HTOBE(Perl_my_htobe16,U16)
2064 NOT_AVAIL(Perl_my_htobe16,U16)
2067 #ifdef PERL_NEED_MY_BETOH16
2069 BETOH(Perl_my_betoh16,U16)
2071 NOT_AVAIL(Perl_my_betoh16,U16)
2075 #ifdef PERL_NEED_MY_HTOLE32
2077 HTOLE(Perl_my_htole32,U32)
2079 NOT_AVAIL(Perl_my_htole32,U32)
2082 #ifdef PERL_NEED_MY_LETOH32
2084 LETOH(Perl_my_letoh32,U32)
2086 NOT_AVAIL(Perl_my_letoh32,U32)
2089 #ifdef PERL_NEED_MY_HTOBE32
2091 HTOBE(Perl_my_htobe32,U32)
2093 NOT_AVAIL(Perl_my_htobe32,U32)
2096 #ifdef PERL_NEED_MY_BETOH32
2098 BETOH(Perl_my_betoh32,U32)
2100 NOT_AVAIL(Perl_my_betoh32,U32)
2104 #ifdef PERL_NEED_MY_HTOLE64
2106 HTOLE(Perl_my_htole64,U64)
2108 NOT_AVAIL(Perl_my_htole64,U64)
2111 #ifdef PERL_NEED_MY_LETOH64
2113 LETOH(Perl_my_letoh64,U64)
2115 NOT_AVAIL(Perl_my_letoh64,U64)
2118 #ifdef PERL_NEED_MY_HTOBE64
2120 HTOBE(Perl_my_htobe64,U64)
2122 NOT_AVAIL(Perl_my_htobe64,U64)
2125 #ifdef PERL_NEED_MY_BETOH64
2127 BETOH(Perl_my_betoh64,U64)
2129 NOT_AVAIL(Perl_my_betoh64,U64)
2133 #ifdef PERL_NEED_MY_HTOLES
2134 HTOLE(Perl_my_htoles,short)
2136 #ifdef PERL_NEED_MY_LETOHS
2137 LETOH(Perl_my_letohs,short)
2139 #ifdef PERL_NEED_MY_HTOBES
2140 HTOBE(Perl_my_htobes,short)
2142 #ifdef PERL_NEED_MY_BETOHS
2143 BETOH(Perl_my_betohs,short)
2146 #ifdef PERL_NEED_MY_HTOLEI
2147 HTOLE(Perl_my_htolei,int)
2149 #ifdef PERL_NEED_MY_LETOHI
2150 LETOH(Perl_my_letohi,int)
2152 #ifdef PERL_NEED_MY_HTOBEI
2153 HTOBE(Perl_my_htobei,int)
2155 #ifdef PERL_NEED_MY_BETOHI
2156 BETOH(Perl_my_betohi,int)
2159 #ifdef PERL_NEED_MY_HTOLEL
2160 HTOLE(Perl_my_htolel,long)
2162 #ifdef PERL_NEED_MY_LETOHL
2163 LETOH(Perl_my_letohl,long)
2165 #ifdef PERL_NEED_MY_HTOBEL
2166 HTOBE(Perl_my_htobel,long)
2168 #ifdef PERL_NEED_MY_BETOHL
2169 BETOH(Perl_my_betohl,long)
2173 Perl_my_swabn(void *ptr, int n)
2175 register char *s = (char *)ptr;
2176 register char *e = s + (n-1);
2179 for (n /= 2; n > 0; s++, e--, n--) {
2187 Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
2189 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
2192 register I32 This, that;
2198 PERL_FLUSHALL_FOR_CHILD;
2199 This = (*mode == 'w');
2203 taint_proper("Insecure %s%s", "EXEC");
2205 if (PerlProc_pipe(p) < 0)
2207 /* Try for another pipe pair for error return */
2208 if (PerlProc_pipe(pp) >= 0)
2210 while ((pid = PerlProc_fork()) < 0) {
2211 if (errno != EAGAIN) {
2212 PerlLIO_close(p[This]);
2213 PerlLIO_close(p[that]);
2215 PerlLIO_close(pp[0]);
2216 PerlLIO_close(pp[1]);
2228 /* Close parent's end of error status pipe (if any) */
2230 PerlLIO_close(pp[0]);
2231 #if defined(HAS_FCNTL) && defined(F_SETFD)
2232 /* Close error pipe automatically if exec works */
2233 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2236 /* Now dup our end of _the_ pipe to right position */
2237 if (p[THIS] != (*mode == 'r')) {
2238 PerlLIO_dup2(p[THIS], *mode == 'r');
2239 PerlLIO_close(p[THIS]);
2240 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2241 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2244 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2245 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2246 /* No automatic close - do it by hand */
2253 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
2259 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
2265 do_execfree(); /* free any memory malloced by child on fork */
2267 PerlLIO_close(pp[1]);
2268 /* Keep the lower of the two fd numbers */
2269 if (p[that] < p[This]) {
2270 PerlLIO_dup2(p[This], p[that]);
2271 PerlLIO_close(p[This]);
2275 PerlLIO_close(p[that]); /* close child's end of pipe */
2278 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2280 SvUPGRADE(sv,SVt_IV);
2282 PL_forkprocess = pid;
2283 /* If we managed to get status pipe check for exec fail */
2284 if (did_pipes && pid > 0) {
2289 while (n < sizeof(int)) {
2290 n1 = PerlLIO_read(pp[0],
2291 (void*)(((char*)&errkid)+n),
2297 PerlLIO_close(pp[0]);
2299 if (n) { /* Error */
2301 PerlLIO_close(p[This]);
2302 if (n != sizeof(int))
2303 Perl_croak(aTHX_ "panic: kid popen errno read");
2305 pid2 = wait4pid(pid, &status, 0);
2306 } while (pid2 == -1 && errno == EINTR);
2307 errno = errkid; /* Propagate errno from kid */
2312 PerlLIO_close(pp[0]);
2313 return PerlIO_fdopen(p[This], mode);
2315 # ifdef OS2 /* Same, without fork()ing and all extra overhead... */
2316 return my_syspopen4(aTHX_ Nullch, mode, n, args);
2318 Perl_croak(aTHX_ "List form of piped open not implemented");
2319 return (PerlIO *) NULL;
2324 /* VMS' my_popen() is in VMS.c, same with OS/2. */
2325 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
2327 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2331 register I32 This, that;
2334 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
2338 PERL_FLUSHALL_FOR_CHILD;
2341 return my_syspopen(aTHX_ cmd,mode);
2344 This = (*mode == 'w');
2346 if (doexec && PL_tainting) {
2348 taint_proper("Insecure %s%s", "EXEC");
2350 if (PerlProc_pipe(p) < 0)
2352 if (doexec && PerlProc_pipe(pp) >= 0)
2354 while ((pid = PerlProc_fork()) < 0) {
2355 if (errno != EAGAIN) {
2356 PerlLIO_close(p[This]);
2357 PerlLIO_close(p[that]);
2359 PerlLIO_close(pp[0]);
2360 PerlLIO_close(pp[1]);
2363 Perl_croak(aTHX_ "Can't fork");
2376 PerlLIO_close(pp[0]);
2377 #if defined(HAS_FCNTL) && defined(F_SETFD)
2378 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2381 if (p[THIS] != (*mode == 'r')) {
2382 PerlLIO_dup2(p[THIS], *mode == 'r');
2383 PerlLIO_close(p[THIS]);
2384 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2385 PerlLIO_close(p[THAT]);
2388 PerlLIO_close(p[THAT]);
2391 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2398 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2403 /* may or may not use the shell */
2404 do_exec3(cmd, pp[1], did_pipes);
2407 #endif /* defined OS2 */
2409 #ifdef PERLIO_USING_CRLF
2410 /* Since we circumvent IO layers when we manipulate low-level
2411 filedescriptors directly, need to manually switch to the
2412 default, binary, low-level mode; see PerlIOBuf_open(). */
2413 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2416 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
2417 SvREADONLY_off(GvSV(tmpgv));
2418 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
2419 SvREADONLY_on(GvSV(tmpgv));
2421 #ifdef THREADS_HAVE_PIDS
2422 PL_ppid = (IV)getppid();
2425 #ifdef PERL_USES_PL_PIDSTATUS
2426 hv_clear(PL_pidstatus); /* we have no children */
2432 do_execfree(); /* free any memory malloced by child on vfork */
2434 PerlLIO_close(pp[1]);
2435 if (p[that] < p[This]) {
2436 PerlLIO_dup2(p[This], p[that]);
2437 PerlLIO_close(p[This]);
2441 PerlLIO_close(p[that]);
2444 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2446 SvUPGRADE(sv,SVt_IV);
2448 PL_forkprocess = pid;
2449 if (did_pipes && pid > 0) {
2454 while (n < sizeof(int)) {
2455 n1 = PerlLIO_read(pp[0],
2456 (void*)(((char*)&errkid)+n),
2462 PerlLIO_close(pp[0]);
2464 if (n) { /* Error */
2466 PerlLIO_close(p[This]);
2467 if (n != sizeof(int))
2468 Perl_croak(aTHX_ "panic: kid popen errno read");
2470 pid2 = wait4pid(pid, &status, 0);
2471 } while (pid2 == -1 && errno == EINTR);
2472 errno = errkid; /* Propagate errno from kid */
2477 PerlLIO_close(pp[0]);
2478 return PerlIO_fdopen(p[This], mode);
2481 #if defined(atarist) || defined(EPOC)
2484 Perl_my_popen((pTHX_ const char *cmd, const char *mode)
2486 PERL_FLUSHALL_FOR_CHILD;
2487 /* Call system's popen() to get a FILE *, then import it.
2488 used 0 for 2nd parameter to PerlIO_importFILE;
2491 return PerlIO_importFILE(popen(cmd, mode), 0);
2495 FILE *djgpp_popen();
2497 Perl_my_popen((pTHX_ const char *cmd, const char *mode)
2499 PERL_FLUSHALL_FOR_CHILD;
2500 /* Call system's popen() to get a FILE *, then import it.
2501 used 0 for 2nd parameter to PerlIO_importFILE;
2504 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2509 #endif /* !DOSISH */
2511 /* this is called in parent before the fork() */
2513 Perl_atfork_lock(void)
2516 #if defined(USE_ITHREADS)
2517 /* locks must be held in locking order (if any) */
2519 MUTEX_LOCK(&PL_malloc_mutex);
2525 /* this is called in both parent and child after the fork() */
2527 Perl_atfork_unlock(void)
2530 #if defined(USE_ITHREADS)
2531 /* locks must be released in same order as in atfork_lock() */
2533 MUTEX_UNLOCK(&PL_malloc_mutex);
2542 #if defined(HAS_FORK)
2544 #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
2549 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2550 * handlers elsewhere in the code */
2555 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2556 Perl_croak_nocontext("fork() not available");
2558 #endif /* HAS_FORK */
2563 Perl_dump_fds(pTHX_ char *s)
2568 PerlIO_printf(Perl_debug_log,"%s", s);
2569 for (fd = 0; fd < 32; fd++) {
2570 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
2571 PerlIO_printf(Perl_debug_log," %d",fd);
2573 PerlIO_printf(Perl_debug_log,"\n");
2576 #endif /* DUMP_FDS */
2580 dup2(int oldfd, int newfd)
2582 #if defined(HAS_FCNTL) && defined(F_DUPFD)
2585 PerlLIO_close(newfd);
2586 return fcntl(oldfd, F_DUPFD, newfd);
2588 #define DUP2_MAX_FDS 256
2589 int fdtmp[DUP2_MAX_FDS];
2595 PerlLIO_close(newfd);
2596 /* good enough for low fd's... */
2597 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
2598 if (fdx >= DUP2_MAX_FDS) {
2606 PerlLIO_close(fdtmp[--fdx]);
2613 #ifdef HAS_SIGACTION
2615 #ifdef MACOS_TRADITIONAL
2616 /* We don't want restart behavior on MacOS */
2621 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2624 struct sigaction act, oact;
2627 /* only "parent" interpreter can diddle signals */
2628 if (PL_curinterp != aTHX)
2629 return (Sighandler_t) SIG_ERR;
2632 act.sa_handler = (void(*)(int))handler;
2633 sigemptyset(&act.sa_mask);
2636 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2637 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2639 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2640 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2641 act.sa_flags |= SA_NOCLDWAIT;
2643 if (sigaction(signo, &act, &oact) == -1)
2644 return (Sighandler_t) SIG_ERR;
2646 return (Sighandler_t) oact.sa_handler;
2650 Perl_rsignal_state(pTHX_ int signo)
2652 struct sigaction oact;
2653 PERL_UNUSED_CONTEXT;
2655 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2656 return (Sighandler_t) SIG_ERR;
2658 return (Sighandler_t) oact.sa_handler;
2662 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2665 struct sigaction act;
2668 /* only "parent" interpreter can diddle signals */
2669 if (PL_curinterp != aTHX)
2673 act.sa_handler = (void(*)(int))handler;
2674 sigemptyset(&act.sa_mask);
2677 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2678 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2680 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2681 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2682 act.sa_flags |= SA_NOCLDWAIT;
2684 return sigaction(signo, &act, save);
2688 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2692 /* only "parent" interpreter can diddle signals */
2693 if (PL_curinterp != aTHX)
2697 return sigaction(signo, save, (struct sigaction *)NULL);
2700 #else /* !HAS_SIGACTION */
2703 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2705 #if defined(USE_ITHREADS) && !defined(WIN32)
2706 /* only "parent" interpreter can diddle signals */
2707 if (PL_curinterp != aTHX)
2708 return (Sighandler_t) SIG_ERR;
2711 return PerlProc_signal(signo, handler);
2722 Perl_rsignal_state(pTHX_ int signo)
2725 Sighandler_t oldsig;
2727 #if defined(USE_ITHREADS) && !defined(WIN32)
2728 /* only "parent" interpreter can diddle signals */
2729 if (PL_curinterp != aTHX)
2730 return (Sighandler_t) SIG_ERR;
2734 oldsig = PerlProc_signal(signo, sig_trap);
2735 PerlProc_signal(signo, oldsig);
2737 PerlProc_kill(PerlProc_getpid(), signo);
2742 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2744 #if defined(USE_ITHREADS) && !defined(WIN32)
2745 /* only "parent" interpreter can diddle signals */
2746 if (PL_curinterp != aTHX)
2749 *save = PerlProc_signal(signo, handler);
2750 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
2754 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2756 #if defined(USE_ITHREADS) && !defined(WIN32)
2757 /* only "parent" interpreter can diddle signals */
2758 if (PL_curinterp != aTHX)
2761 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
2764 #endif /* !HAS_SIGACTION */
2765 #endif /* !PERL_MICRO */
2767 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
2768 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
2770 Perl_my_pclose(pTHX_ PerlIO *ptr)
2773 Sigsave_t hstat, istat, qstat;
2779 int saved_errno = 0;
2781 int saved_win32_errno;
2785 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
2787 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
2789 *svp = &PL_sv_undef;
2791 if (pid == -1) { /* Opened by popen. */
2792 return my_syspclose(ptr);
2795 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2796 saved_errno = errno;
2798 saved_win32_errno = GetLastError();
2802 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
2805 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2806 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2807 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
2810 pid2 = wait4pid(pid, &status, 0);
2811 } while (pid2 == -1 && errno == EINTR);
2813 rsignal_restore(SIGHUP, &hstat);
2814 rsignal_restore(SIGINT, &istat);
2815 rsignal_restore(SIGQUIT, &qstat);
2818 SETERRNO(saved_errno, 0);
2821 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
2823 #endif /* !DOSISH */
2825 #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
2827 Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
2833 #ifdef PERL_USES_PL_PIDSTATUS
2836 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2837 pid, rather than a string form. */
2838 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
2839 if (svp && *svp != &PL_sv_undef) {
2840 *statusp = SvIVX(*svp);
2841 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2849 hv_iterinit(PL_pidstatus);
2850 if ((entry = hv_iternext(PL_pidstatus))) {
2851 SV * const sv = hv_iterval(PL_pidstatus,entry);
2853 const char * const spid = hv_iterkey(entry,&len);
2855 assert (len == sizeof(Pid_t));
2856 memcpy((char *)&pid, spid, len);
2857 *statusp = SvIVX(sv);
2858 /* The hash iterator is currently on this entry, so simply
2859 calling hv_delete would trigger the lazy delete, which on
2860 aggregate does more work, beacuse next call to hv_iterinit()
2861 would spot the flag, and have to call the delete routine,
2862 while in the meantime any new entries can't re-use that
2864 hv_iterinit(PL_pidstatus);
2865 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
2872 # ifdef HAS_WAITPID_RUNTIME
2873 if (!HAS_WAITPID_RUNTIME)
2876 result = PerlProc_waitpid(pid,statusp,flags);
2879 #if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
2880 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
2883 #ifdef PERL_USES_PL_PIDSTATUS
2884 #if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
2889 Perl_croak(aTHX_ "Can't do waitpid with flags");
2891 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
2892 pidgone(result,*statusp);
2898 #if defined(HAS_WAITPID) || defined(HAS_WAIT4)
2901 if (result < 0 && errno == EINTR) {
2906 #endif /* !DOSISH || OS2 || WIN32 || NETWARE */
2908 #ifdef PERL_USES_PL_PIDSTATUS
2910 Perl_pidgone(pTHX_ Pid_t pid, int status)
2914 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
2915 SvUPGRADE(sv,SVt_IV);
2916 SvIV_set(sv, status);
2921 #if defined(atarist) || defined(OS2) || defined(EPOC)
2924 int /* Cannot prototype with I32
2926 my_syspclose(PerlIO *ptr)
2929 Perl_my_pclose(pTHX_ PerlIO *ptr)
2932 /* Needs work for PerlIO ! */
2933 FILE * const f = PerlIO_findFILE(ptr);
2934 const I32 result = pclose(f);
2935 PerlIO_releaseFILE(ptr,f);
2943 Perl_my_pclose(pTHX_ PerlIO *ptr)
2945 /* Needs work for PerlIO ! */
2946 FILE * const f = PerlIO_findFILE(ptr);
2947 I32 result = djgpp_pclose(f);
2948 result = (result << 8) & 0xff00;
2949 PerlIO_releaseFILE(ptr,f);
2955 Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
2958 register const char * const frombase = from;
2959 PERL_UNUSED_CONTEXT;
2962 register const char c = *from;
2967 while (count-- > 0) {
2968 for (todo = len; todo > 0; todo--) {
2977 Perl_same_dirent(pTHX_ const char *a, const char *b)
2979 char *fa = strrchr(a,'/');
2980 char *fb = strrchr(b,'/');
2983 SV * const tmpsv = sv_newmortal();
2996 sv_setpvn(tmpsv, ".", 1);
2998 sv_setpvn(tmpsv, a, fa - a);
2999 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
3002 sv_setpvn(tmpsv, ".", 1);
3004 sv_setpvn(tmpsv, b, fb - b);
3005 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
3007 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3008 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3010 #endif /* !HAS_RENAME */
3013 Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3014 const char *const *const search_ext, I32 flags)
3017 const char *xfound = NULL;
3018 char *xfailed = NULL;
3019 char tmpbuf[MAXPATHLEN];
3024 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
3025 # define SEARCH_EXTS ".bat", ".cmd", NULL
3026 # define MAX_EXT_LEN 4
3029 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3030 # define MAX_EXT_LEN 4
3033 # define SEARCH_EXTS ".pl", ".com", NULL
3034 # define MAX_EXT_LEN 4
3036 /* additional extensions to try in each dir if scriptname not found */
3038 static const char *const exts[] = { SEARCH_EXTS };
3039 const char *const *const ext = search_ext ? search_ext : exts;
3040 int extidx = 0, i = 0;
3041 const char *curext = NULL;
3043 PERL_UNUSED_ARG(search_ext);
3044 # define MAX_EXT_LEN 0
3048 * If dosearch is true and if scriptname does not contain path
3049 * delimiters, search the PATH for scriptname.
3051 * If SEARCH_EXTS is also defined, will look for each
3052 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3053 * while searching the PATH.
3055 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3056 * proceeds as follows:
3057 * If DOSISH or VMSISH:
3058 * + look for ./scriptname{,.foo,.bar}
3059 * + search the PATH for scriptname{,.foo,.bar}
3062 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3063 * this will not look in '.' if it's not in the PATH)
3068 # ifdef ALWAYS_DEFTYPES
3069 len = strlen(scriptname);
3070 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
3071 int idx = 0, deftypes = 1;
3074 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
3077 int idx = 0, deftypes = 1;
3080 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
3082 /* The first time through, just add SEARCH_EXTS to whatever we
3083 * already have, so we can check for default file types. */
3085 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
3091 if ((strlen(tmpbuf) + strlen(scriptname)
3092 + MAX_EXT_LEN) >= sizeof tmpbuf)
3093 continue; /* don't search dir with too-long name */
3094 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
3098 if (strEQ(scriptname, "-"))
3100 if (dosearch) { /* Look in '.' first. */
3101 const char *cur = scriptname;
3103 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3105 if (strEQ(ext[i++],curext)) {
3106 extidx = -1; /* already has an ext */
3111 DEBUG_p(PerlIO_printf(Perl_debug_log,
3112 "Looking for %s\n",cur));
3113 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3114 && !S_ISDIR(PL_statbuf.st_mode)) {
3122 if (cur == scriptname) {
3123 len = strlen(scriptname);
3124 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
3126 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3129 } while (extidx >= 0 && ext[extidx] /* try an extension? */
3130 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
3135 #ifdef MACOS_TRADITIONAL
3136 if (dosearch && !strchr(scriptname, ':') &&
3137 (s = PerlEnv_getenv("Commands")))
3139 if (dosearch && !strchr(scriptname, '/')
3141 && !strchr(scriptname, '\\')
3143 && (s = PerlEnv_getenv("PATH")))
3148 bufend = s + strlen(s);
3149 while (s < bufend) {
3150 #ifdef MACOS_TRADITIONAL
3151 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
3155 #if defined(atarist) || defined(DOSISH)
3160 && *s != ';'; len++, s++) {
3161 if (len < sizeof tmpbuf)
3164 if (len < sizeof tmpbuf)
3166 #else /* ! (atarist || DOSISH) */
3167 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
3170 #endif /* ! (atarist || DOSISH) */
3171 #endif /* MACOS_TRADITIONAL */
3174 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
3175 continue; /* don't search dir with too-long name */
3176 #ifdef MACOS_TRADITIONAL
3177 if (len && tmpbuf[len - 1] != ':')
3178 tmpbuf[len++] = ':';
3181 # if defined(atarist) || defined(__MINT__) || defined(DOSISH)
3182 && tmpbuf[len - 1] != '/'
3183 && tmpbuf[len - 1] != '\\'
3186 tmpbuf[len++] = '/';
3187 if (len == 2 && tmpbuf[0] == '.')
3190 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
3194 len = strlen(tmpbuf);
3195 if (extidx > 0) /* reset after previous loop */
3199 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3200 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
3201 if (S_ISDIR(PL_statbuf.st_mode)) {
3205 } while ( retval < 0 /* not there */
3206 && extidx>=0 && ext[extidx] /* try an extension? */
3207 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
3212 if (S_ISREG(PL_statbuf.st_mode)
3213 && cando(S_IRUSR,TRUE,&PL_statbuf)
3214 #if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3215 && cando(S_IXUSR,TRUE,&PL_statbuf)
3219 xfound = tmpbuf; /* bingo! */
3223 xfailed = savepv(tmpbuf);
3226 if (!xfound && !seen_dot && !xfailed &&
3227 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
3228 || S_ISDIR(PL_statbuf.st_mode)))
3230 seen_dot = 1; /* Disable message. */
3232 if (flags & 1) { /* do or die? */
3233 Perl_croak(aTHX_ "Can't %s %s%s%s",
3234 (xfailed ? "execute" : "find"),
3235 (xfailed ? xfailed : scriptname),
3236 (xfailed ? "" : " on PATH"),
3237 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3242 scriptname = xfound;
3244 return (scriptname ? savepv(scriptname) : NULL);
3247 #ifndef PERL_GET_CONTEXT_DEFINED
3250 Perl_get_context(void)
3253 #if defined(USE_ITHREADS)
3254 # ifdef OLD_PTHREADS_API
3256 if (pthread_getspecific(PL_thr_key, &t))
3257 Perl_croak_nocontext("panic: pthread_getspecific");
3260 # ifdef I_MACH_CTHREADS
3261 return (void*)cthread_data(cthread_self());
3263 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3272 Perl_set_context(void *t)
3275 #if defined(USE_ITHREADS)
3276 # ifdef I_MACH_CTHREADS
3277 cthread_set_data(cthread_self(), t);
3279 if (pthread_setspecific(PL_thr_key, t))
3280 Perl_croak_nocontext("panic: pthread_setspecific");
3287 #endif /* !PERL_GET_CONTEXT_DEFINED */
3289 #if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
3298 Perl_get_op_names(pTHX)
3300 PERL_UNUSED_CONTEXT;
3301 return (char **)PL_op_name;
3305 Perl_get_op_descs(pTHX)
3307 PERL_UNUSED_CONTEXT;
3308 return (char **)PL_op_desc;
3312 Perl_get_no_modify(pTHX)
3314 PERL_UNUSED_CONTEXT;
3315 return PL_no_modify;
3319 Perl_get_opargs(pTHX)
3321 PERL_UNUSED_CONTEXT;
3322 return (U32 *)PL_opargs;
3326 Perl_get_ppaddr(pTHX)
3329 PERL_UNUSED_CONTEXT;
3330 return (PPADDR_t*)PL_ppaddr;
3333 #ifndef HAS_GETENV_LEN
3335 Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
3337 char * const env_trans = PerlEnv_getenv(env_elem);
3338 PERL_UNUSED_CONTEXT;
3340 *len = strlen(env_trans);
3347 Perl_get_vtbl(pTHX_ int vtbl_id)
3349 const MGVTBL* result;
3350 PERL_UNUSED_CONTEXT;
3354 result = &PL_vtbl_sv;
3357 result = &PL_vtbl_env;
3359 case want_vtbl_envelem:
3360 result = &PL_vtbl_envelem;
3363 result = &PL_vtbl_sig;
3365 case want_vtbl_sigelem:
3366 result = &PL_vtbl_sigelem;
3368 case want_vtbl_pack:
3369 result = &PL_vtbl_pack;
3371 case want_vtbl_packelem:
3372 result = &PL_vtbl_packelem;
3374 case want_vtbl_dbline:
3375 result = &PL_vtbl_dbline;
3378 result = &PL_vtbl_isa;
3380 case want_vtbl_isaelem:
3381 result = &PL_vtbl_isaelem;
3383 case want_vtbl_arylen:
3384 result = &PL_vtbl_arylen;
3386 case want_vtbl_mglob:
3387 result = &PL_vtbl_mglob;
3389 case want_vtbl_nkeys:
3390 result = &PL_vtbl_nkeys;
3392 case want_vtbl_taint:
3393 result = &PL_vtbl_taint;
3395 case want_vtbl_substr:
3396 result = &PL_vtbl_substr;
3399 result = &PL_vtbl_vec;
3402 result = &PL_vtbl_pos;
3405 result = &PL_vtbl_bm;
3408 result = &PL_vtbl_fm;
3410 case want_vtbl_uvar:
3411 result = &PL_vtbl_uvar;
3413 case want_vtbl_defelem:
3414 result = &PL_vtbl_defelem;
3416 case want_vtbl_regexp:
3417 result = &PL_vtbl_regexp;
3419 case want_vtbl_regdata:
3420 result = &PL_vtbl_regdata;
3422 case want_vtbl_regdatum:
3423 result = &PL_vtbl_regdatum;
3425 #ifdef USE_LOCALE_COLLATE
3426 case want_vtbl_collxfrm:
3427 result = &PL_vtbl_collxfrm;
3430 case want_vtbl_amagic:
3431 result = &PL_vtbl_amagic;
3433 case want_vtbl_amagicelem:
3434 result = &PL_vtbl_amagicelem;
3436 case want_vtbl_backref:
3437 result = &PL_vtbl_backref;
3439 case want_vtbl_utf8:
3440 result = &PL_vtbl_utf8;
3446 return (MGVTBL*)result;
3450 Perl_my_fflush_all(pTHX)
3452 #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
3453 return PerlIO_flush(NULL);
3455 # if defined(HAS__FWALK)
3456 extern int fflush(FILE *);
3457 /* undocumented, unprototyped, but very useful BSDism */
3458 extern void _fwalk(int (*)(FILE *));
3462 # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
3464 # ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3465 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3467 # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3468 open_max = sysconf(_SC_OPEN_MAX);
3471 open_max = FOPEN_MAX;
3474 open_max = OPEN_MAX;
3485 for (i = 0; i < open_max; i++)
3486 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3487 STDIO_STREAM_ARRAY[i]._file < open_max &&
3488 STDIO_STREAM_ARRAY[i]._flag)
3489 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
3493 SETERRNO(EBADF,RMS_IFI);
3500 Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
3502 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
3504 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3505 if (ckWARN(WARN_IO)) {
3506 const char * const direction =
3507 (const char *)((op == OP_phoney_INPUT_ONLY) ? "in" : "out");
3509 Perl_warner(aTHX_ packWARN(WARN_IO),
3510 "Filehandle %s opened only for %sput",
3513 Perl_warner(aTHX_ packWARN(WARN_IO),
3514 "Filehandle opened only for %sput", direction);
3521 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3523 warn_type = WARN_CLOSED;
3527 warn_type = WARN_UNOPENED;
3530 if (ckWARN(warn_type)) {
3531 const char * const pars =
3532 (const char *)(OP_IS_FILETEST(op) ? "" : "()");
3533 const char * const func =
3535 (op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3536 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3537 op < 0 ? "" : /* handle phoney cases */
3539 const char * const type =
3541 (OP_IS_SOCKET(op) ||
3542 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
3543 "socket" : "filehandle");
3544 if (name && *name) {
3545 Perl_warner(aTHX_ packWARN(warn_type),
3546 "%s%s on %s %s %s", func, pars, vile, type, name);
3547 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3549 aTHX_ packWARN(warn_type),
3550 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3555 Perl_warner(aTHX_ packWARN(warn_type),
3556 "%s%s on %s %s", func, pars, vile, type);
3557 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3559 aTHX_ packWARN(warn_type),
3560 "\t(Are you trying to call %s%s on dirhandle?)\n",
3569 /* in ASCII order, not that it matters */
3570 static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3573 Perl_ebcdic_control(pTHX_ int ch)
3581 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3582 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3585 if (ctlp == controllablechars)
3586 return('\177'); /* DEL */
3588 return((unsigned char)(ctlp - controllablechars - 1));
3589 } else { /* Want uncontrol */
3590 if (ch == '\177' || ch == -1)
3592 else if (ch == '\157')
3594 else if (ch == '\174')
3596 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3598 else if (ch == '\155')
3600 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3601 return(controllablechars[ch+1]);
3603 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3608 /* To workaround core dumps from the uninitialised tm_zone we get the
3609 * system to give us a reasonable struct to copy. This fix means that
3610 * strftime uses the tm_zone and tm_gmtoff values returned by
3611 * localtime(time()). That should give the desired result most of the
3612 * time. But probably not always!
3614 * This does not address tzname aspects of NETaa14816.
3619 # ifndef STRUCT_TM_HASZONE
3620 # define STRUCT_TM_HASZONE
3624 #ifdef STRUCT_TM_HASZONE /* Backward compat */
3625 # ifndef HAS_TM_TM_ZONE
3626 # define HAS_TM_TM_ZONE
3631 Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
3633 #ifdef HAS_TM_TM_ZONE
3635 const struct tm* my_tm;
3637 my_tm = localtime(&now);
3639 Copy(my_tm, ptm, 1, struct tm);
3641 PERL_UNUSED_ARG(ptm);
3646 * mini_mktime - normalise struct tm values without the localtime()
3647 * semantics (and overhead) of mktime().
3650 Perl_mini_mktime(pTHX_ struct tm *ptm)
3654 int month, mday, year, jday;
3655 int odd_cent, odd_year;
3656 PERL_UNUSED_CONTEXT;
3658 #define DAYS_PER_YEAR 365
3659 #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3660 #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3661 #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3662 #define SECS_PER_HOUR (60*60)
3663 #define SECS_PER_DAY (24*SECS_PER_HOUR)
3664 /* parentheses deliberately absent on these two, otherwise they don't work */
3665 #define MONTH_TO_DAYS 153/5
3666 #define DAYS_TO_MONTH 5/153
3667 /* offset to bias by March (month 4) 1st between month/mday & year finding */
3668 #define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3669 /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3670 #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3673 * Year/day algorithm notes:
3675 * With a suitable offset for numeric value of the month, one can find
3676 * an offset into the year by considering months to have 30.6 (153/5) days,
3677 * using integer arithmetic (i.e., with truncation). To avoid too much
3678 * messing about with leap days, we consider January and February to be
3679 * the 13th and 14th month of the previous year. After that transformation,
3680 * we need the month index we use to be high by 1 from 'normal human' usage,
3681 * so the month index values we use run from 4 through 15.
3683 * Given that, and the rules for the Gregorian calendar (leap years are those
3684 * divisible by 4 unless also divisible by 100, when they must be divisible
3685 * by 400 instead), we can simply calculate the number of days since some
3686 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3687 * the days we derive from our month index, and adding in the day of the
3688 * month. The value used here is not adjusted for the actual origin which
3689 * it normally would use (1 January A.D. 1), since we're not exposing it.
3690 * We're only building the value so we can turn around and get the
3691 * normalised values for the year, month, day-of-month, and day-of-year.
3693 * For going backward, we need to bias the value we're using so that we find
3694 * the right year value. (Basically, we don't want the contribution of
3695 * March 1st to the number to apply while deriving the year). Having done
3696 * that, we 'count up' the contribution to the year number by accounting for
3697 * full quadracenturies (400-year periods) with their extra leap days, plus
3698 * the contribution from full centuries (to avoid counting in the lost leap
3699 * days), plus the contribution from full quad-years (to count in the normal
3700 * leap days), plus the leftover contribution from any non-leap years.
3701 * At this point, if we were working with an actual leap day, we'll have 0
3702 * days left over. This is also true for March 1st, however. So, we have
3703 * to special-case that result, and (earlier) keep track of the 'odd'
3704 * century and year contributions. If we got 4 extra centuries in a qcent,
3705 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3706 * Otherwise, we add back in the earlier bias we removed (the 123 from
3707 * figuring in March 1st), find the month index (integer division by 30.6),
3708 * and the remainder is the day-of-month. We then have to convert back to
3709 * 'real' months (including fixing January and February from being 14/15 in
3710 * the previous year to being in the proper year). After that, to get
3711 * tm_yday, we work with the normalised year and get a new yearday value for
3712 * January 1st, which we subtract from the yearday value we had earlier,
3713 * representing the date we've re-built. This is done from January 1
3714 * because tm_yday is 0-origin.
3716 * Since POSIX time routines are only guaranteed to work for times since the
3717 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3718 * applies Gregorian calendar rules even to dates before the 16th century
3719 * doesn't bother me. Besides, you'd need cultural context for a given
3720 * date to know whether it was Julian or Gregorian calendar, and that's
3721 * outside the scope for this routine. Since we convert back based on the
3722 * same rules we used to build the yearday, you'll only get strange results
3723 * for input which needed normalising, or for the 'odd' century years which
3724 * were leap years in the Julian calander but not in the Gregorian one.
3725 * I can live with that.
3727 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3728 * that's still outside the scope for POSIX time manipulation, so I don't
3732 year = 1900 + ptm->tm_year;
3733 month = ptm->tm_mon;
3734 mday = ptm->tm_mday;
3735 /* allow given yday with no month & mday to dominate the result */
3736 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3739 jday = 1 + ptm->tm_yday;
3748 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3749 yearday += month*MONTH_TO_DAYS + mday + jday;
3751 * Note that we don't know when leap-seconds were or will be,
3752 * so we have to trust the user if we get something which looks
3753 * like a sensible leap-second. Wild values for seconds will
3754 * be rationalised, however.
3756 if ((unsigned) ptm->tm_sec <= 60) {
3763 secs += 60 * ptm->tm_min;
3764 secs += SECS_PER_HOUR * ptm->tm_hour;
3766 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3767 /* got negative remainder, but need positive time */
3768 /* back off an extra day to compensate */
3769 yearday += (secs/SECS_PER_DAY)-1;
3770 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3773 yearday += (secs/SECS_PER_DAY);
3774 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3777 else if (secs >= SECS_PER_DAY) {
3778 yearday += (secs/SECS_PER_DAY);
3779 secs %= SECS_PER_DAY;
3781 ptm->tm_hour = secs/SECS_PER_HOUR;
3782 secs %= SECS_PER_HOUR;
3783 ptm->tm_min = secs/60;
3785 ptm->tm_sec += secs;
3786 /* done with time of day effects */
3788 * The algorithm for yearday has (so far) left it high by 428.
3789 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3790 * bias it by 123 while trying to figure out what year it
3791 * really represents. Even with this tweak, the reverse
3792 * translation fails for years before A.D. 0001.
3793 * It would still fail for Feb 29, but we catch that one below.
3795 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3796 yearday -= YEAR_ADJUST;
3797 year = (yearday / DAYS_PER_QCENT) * 400;
3798 yearday %= DAYS_PER_QCENT;
3799 odd_cent = yearday / DAYS_PER_CENT;
3800 year += odd_cent * 100;
3801 yearday %= DAYS_PER_CENT;
3802 year += (yearday / DAYS_PER_QYEAR) * 4;
3803 yearday %= DAYS_PER_QYEAR;
3804 odd_year = yearday / DAYS_PER_YEAR;
3806 yearday %= DAYS_PER_YEAR;
3807 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3812 yearday += YEAR_ADJUST; /* recover March 1st crock */
3813 month = yearday*DAYS_TO_MONTH;
3814 yearday -= month*MONTH_TO_DAYS;
3815 /* recover other leap-year adjustment */
3824 ptm->tm_year = year - 1900;
3826 ptm->tm_mday = yearday;
3827 ptm->tm_mon = month;
3831 ptm->tm_mon = month - 1;
3833 /* re-build yearday based on Jan 1 to get tm_yday */
3835 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3836 yearday += 14*MONTH_TO_DAYS + 1;
3837 ptm->tm_yday = jday - yearday;
3838 /* fix tm_wday if not overridden by caller */
3839 if ((unsigned)ptm->tm_wday > 6)
3840 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3844 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)
3852 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3855 mytm.tm_hour = hour;
3856 mytm.tm_mday = mday;
3858 mytm.tm_year = year;
3859 mytm.tm_wday = wday;
3860 mytm.tm_yday = yday;
3861 mytm.tm_isdst = isdst;
3863 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3864 #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3869 #ifdef HAS_TM_TM_GMTOFF
3870 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3872 #ifdef HAS_TM_TM_ZONE
3873 mytm.tm_zone = mytm2.tm_zone;
3878 Newx(buf, buflen, char);
3879 len = strftime(buf, buflen, fmt, &mytm);
3881 ** The following is needed to handle to the situation where
3882 ** tmpbuf overflows. Basically we want to allocate a buffer
3883 ** and try repeatedly. The reason why it is so complicated
3884 ** is that getting a return value of 0 from strftime can indicate
3885 ** one of the following:
3886 ** 1. buffer overflowed,
3887 ** 2. illegal conversion specifier, or
3888 ** 3. the format string specifies nothing to be returned(not
3889 ** an error). This could be because format is an empty string
3890 ** or it specifies %p that yields an empty string in some locale.
3891 ** If there is a better way to make it portable, go ahead by
3894 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3897 /* Possibly buf overflowed - try again with a bigger buf */
3898 const int fmtlen = strlen(fmt);
3899 int bufsize = fmtlen + buflen;
3901 Newx(buf, bufsize, char);
3903 buflen = strftime(buf, bufsize, fmt, &mytm);
3904 if (buflen > 0 && buflen < bufsize)
3906 /* heuristic to prevent out-of-memory errors */
3907 if (bufsize > 100*fmtlen) {
3913 Renew(buf, bufsize, char);
3918 Perl_croak(aTHX_ "panic: no strftime");
3924 #define SV_CWD_RETURN_UNDEF \
3925 sv_setsv(sv, &PL_sv_undef); \
3928 #define SV_CWD_ISDOT(dp) \
3929 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3930 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
3933 =head1 Miscellaneous Functions
3935 =for apidoc getcwd_sv
3937 Fill the sv with current working directory
3942 /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3943 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3944 * getcwd(3) if available
3945 * Comments from the orignal:
3946 * This is a faster version of getcwd. It's also more dangerous
3947 * because you might chdir out of a directory that you can't chdir
3951 Perl_getcwd_sv(pTHX_ register SV *sv)
3955 #ifndef INCOMPLETE_TAINTS
3961 char buf[MAXPATHLEN];
3963 /* Some getcwd()s automatically allocate a buffer of the given
3964 * size from the heap if they are given a NULL buffer pointer.
3965 * The problem is that this behaviour is not portable. */
3966 if (getcwd(buf, sizeof(buf) - 1)) {
3971 sv_setsv(sv, &PL_sv_undef);
3979 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
3983 SvUPGRADE(sv, SVt_PV);
3985 if (PerlLIO_lstat(".", &statbuf) < 0) {
3986 SV_CWD_RETURN_UNDEF;
3989 orig_cdev = statbuf.st_dev;
3990 orig_cino = statbuf.st_ino;
3999 if (PerlDir_chdir("..") < 0) {
4000 SV_CWD_RETURN_UNDEF;
4002 if (PerlLIO_stat(".", &statbuf) < 0) {
4003 SV_CWD_RETURN_UNDEF;
4006 cdev = statbuf.st_dev;
4007 cino = statbuf.st_ino;
4009 if (odev == cdev && oino == cino) {
4012 if (!(dir = PerlDir_open("."))) {
4013 SV_CWD_RETURN_UNDEF;
4016 while ((dp = PerlDir_read(dir)) != NULL) {
4018 const int namelen = dp->d_namlen;
4020 const int namelen = strlen(dp->d_name);
4023 if (SV_CWD_ISDOT(dp)) {
4027 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
4028 SV_CWD_RETURN_UNDEF;
4031 tdev = statbuf.st_dev;
4032 tino = statbuf.st_ino;
4033 if (tino == oino && tdev == odev) {
4039 SV_CWD_RETURN_UNDEF;
4042 if (pathlen + namelen + 1 >= MAXPATHLEN) {
4043 SV_CWD_RETURN_UNDEF;
4046 SvGROW(sv, pathlen + namelen + 1);
4050 Move(SvPVX_const(sv), SvPVX(sv) + namelen + 1, pathlen, char);
4053 /* prepend current directory to the front */
4055 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
4056 pathlen += (namelen + 1);
4058 #ifdef VOID_CLOSEDIR
4061 if (PerlDir_close(dir) < 0) {
4062 SV_CWD_RETURN_UNDEF;
4068 SvCUR_set(sv, pathlen);
4072 if (PerlDir_chdir(SvPVX_const(sv)) < 0) {
4073 SV_CWD_RETURN_UNDEF;
4076 if (PerlLIO_stat(".", &statbuf) < 0) {
4077 SV_CWD_RETURN_UNDEF;
4080 cdev = statbuf.st_dev;
4081 cino = statbuf.st_ino;
4083 if (cdev != orig_cdev || cino != orig_cino) {
4084 Perl_croak(aTHX_ "Unstable directory path, "
4085 "current directory changed unexpectedly");
4097 =for apidoc scan_version
4099 Returns a pointer to the next character after the parsed
4100 version string, as well as upgrading the passed in SV to
4103 Function must be called with an already existing SV like
4106 s = scan_version(s, SV *sv, bool qv);
4108 Performs some preprocessing to the string to ensure that
4109 it has the correct characteristics of a version. Flags the
4110 object if it contains an underscore (which denotes this
4111 is an alpha version). The boolean qv denotes that the version
4112 should be interpreted as if it had multiple decimals, even if
4119 Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv)
4127 AV * const av = newAV();
4128 SV * const hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
4129 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4131 #ifndef NODEFAULT_SHAREKEYS
4132 HvSHAREKEYS_on(hv); /* key-sharing on by default */
4135 while (isSPACE(*s)) /* leading whitespace is OK */
4141 s++; /* get past 'v' */
4142 qv = 1; /* force quoted version processing */
4147 /* pre-scan the input string to check for decimals/underbars */
4148 while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) )
4153 Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
4157 else if ( *pos == '_' )
4160 Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
4162 width = pos - last - 1; /* natural width of sub-version */
4167 if ( alpha && !saw_period )
4168 Perl_croak(aTHX_ "Invalid version format (alpha without decimal)");
4170 if ( alpha && saw_period && width == 0 )
4171 Perl_croak(aTHX_ "Invalid version format (misplaced _ in number)");
4173 if ( saw_period > 1 )
4174 qv = 1; /* force quoted version processing */
4179 hv_store((HV *)hv, "qv", 2, newSViv(qv), 0);
4181 hv_store((HV *)hv, "alpha", 5, newSViv(alpha), 0);
4182 if ( !qv && width < 3 )
4183 hv_store((HV *)hv, "width", 5, newSViv(width), 0);
4185 while (isDIGIT(*pos))
4187 if (!isALPHA(*pos)) {
4193 /* this is atoi() that delimits on underscores */
4194 const char *end = pos;
4198 /* the following if() will only be true after the decimal
4199 * point of a version originally created with a bare
4200 * floating point number, i.e. not quoted in any way
4202 if ( !qv && s > start && saw_period == 1 ) {
4206 rev += (*s - '0') * mult;
4208 if ( PERL_ABS(orev) > PERL_ABS(rev) )
4209 Perl_croak(aTHX_ "Integer overflow in version");
4216 while (--end >= s) {
4218 rev += (*end - '0') * mult;
4220 if ( PERL_ABS(orev) > PERL_ABS(rev) )
4221 Perl_croak(aTHX_ "Integer overflow in version");
4226 /* Append revision */
4227 av_push(av, newSViv(rev));
4230 else if ( *pos == '_' && isDIGIT(pos[1]) )
4232 else if ( isDIGIT(*pos) )
4239 while ( isDIGIT(*pos) )
4244 while ( ( isDIGIT(*pos) || *pos == '_' ) && digits < 3 ) {
4252 if ( qv ) { /* quoted versions always get at least three terms*/
4253 I32 len = av_len(av);
4254 /* This for loop appears to trigger a compiler bug on OS X, as it
4255 loops infinitely. Yes, len is negative. No, it makes no sense.
4256 Compiler in question is:
4257 gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
4258 for ( len = 2 - len; len > 0; len-- )
4259 av_push((AV *)sv, newSViv(0));
4263 av_push(av, newSViv(0));
4266 /* need to save off the current version string for later */
4268 SV * orig = newSVpvn(start,s-start);
4269 if ( qv && saw_period == 1 && *start != 'v' ) {
4270 /* need to insert a v to be consistent */
4271 sv_insert(orig, 0, 0, "v", 1);
4273 hv_store((HV *)hv, "original", 8, orig, 0);
4276 hv_store((HV *)hv, "original", 8, newSVpvn("0",1), 0);
4277 av_push(av, newSViv(0));
4280 /* And finally, store the AV in the hash */
4281 hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0);
4283 /* fix RT#19517 - special case 'undef' as string */
4284 if ( *s == 'u' && strEQ(s,"undef") ) {
4292 =for apidoc new_version
4294 Returns a new version object based on the passed in SV:
4296 SV *sv = new_version(SV *ver);
4298 Does not alter the passed in ver SV. See "upg_version" if you
4299 want to upgrade the SV.
4305 Perl_new_version(pTHX_ SV *ver)
4308 SV * const rv = newSV(0);
4309 if ( sv_derived_from(ver,"version") ) /* can just copy directly */
4312 AV * const av = newAV();
4314 /* This will get reblessed later if a derived class*/
4315 SV * const hv = newSVrv(rv, "version");
4316 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4317 #ifndef NODEFAULT_SHAREKEYS
4318 HvSHAREKEYS_on(hv); /* key-sharing on by default */
4324 /* Begin copying all of the elements */
4325 if ( hv_exists((HV *)ver, "qv", 2) )
4326 hv_store((HV *)hv, "qv", 2, &PL_sv_yes, 0);
4328 if ( hv_exists((HV *)ver, "alpha", 5) )
4329 hv_store((HV *)hv, "alpha", 5, &PL_sv_yes, 0);
4331 if ( hv_exists((HV*)ver, "width", 5 ) )
4333 const I32 width = SvIV(*hv_fetchs((HV*)ver, "width", FALSE));
4334 hv_store((HV *)hv, "width", 5, newSViv(width), 0);
4337 if ( hv_exists((HV*)ver, "original", 8 ) )
4339 SV * pv = *hv_fetchs((HV*)ver, "original", FALSE);
4340 hv_store((HV *)hv, "original", 8, newSVsv(pv), 0);
4343 sav = (AV *)SvRV(*hv_fetchs((HV*)ver, "version", FALSE));
4344 /* This will get reblessed later if a derived class*/
4345 for ( key = 0; key <= av_len(sav); key++ )
4347 const I32 rev = SvIV(*av_fetch(sav, key, FALSE));
4348 av_push(av, newSViv(rev));
4351 hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0);
4356 const MAGIC* const mg = SvVSTRING_mg(ver);
4357 if ( mg ) { /* already a v-string */
4358 const STRLEN len = mg->mg_len;
4359 char * const version = savepvn( (const char*)mg->mg_ptr, len);
4360 sv_setpvn(rv,version,len);
4361 /* this is for consistency with the pure Perl class */
4362 if ( *version != 'v' )
4363 sv_insert(rv, 0, 0, "v", 1);
4368 sv_setsv(rv,ver); /* make a duplicate */
4373 return upg_version(rv, FALSE);
4377 =for apidoc upg_version
4379 In-place upgrade of the supplied SV to a version object.
4381 SV *sv = upg_version(SV *sv, bool qv);
4383 Returns a pointer to the upgraded SV. Set the boolean qv if you want
4384 to force this SV to be interpreted as an "extended" version.
4390 Perl_upg_version(pTHX_ SV *ver, bool qv)
4392 const char *version, *s;
4397 if ( SvNOK(ver) && !( SvPOK(ver) && sv_len(ver) == 3 ) )
4399 /* may get too much accuracy */
4401 #ifdef USE_LOCALE_NUMERIC
4402 char *loc = setlocale(LC_NUMERIC, "C");
4404 STRLEN len = my_snprintf(tbuf, sizeof(tbuf), "%.9"NVff, SvNVX(ver));
4405 #ifdef USE_LOCALE_NUMERIC
4406 setlocale(LC_NUMERIC, loc);
4408 while (tbuf[len-1] == '0' && len > 0) len--;
4409 if ( tbuf[len-1] == '.' ) len--; /* eat the trailing decimal */
4410 version = savepvn(tbuf, len);
4413 else if ( (mg = SvVSTRING_mg(ver)) ) { /* already a v-string */
4414 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
4418 else /* must be a string or something like a string */
4421 version = savepv(SvPV(ver,len));
4423 # if PERL_VERSION > 5
4424 /* This will only be executed for 5.6.0 - 5.8.0 inclusive */
4425 if ( len == 3 && !instr(version,".") && !instr(version,"_") ) {
4426 /* may be a v-string */
4427 SV * const nsv = sv_newmortal();
4431 sv_setpvf(nsv,"v%vd",ver);
4432 pos = nver = savepv(SvPV_nolen(nsv));
4434 /* scan the resulting formatted string */
4435 pos++; /* skip the leading 'v' */
4436 while ( *pos == '.' || isDIGIT(*pos) ) {
4442 /* is definitely a v-string */
4443 if ( saw_period == 2 ) {
4452 s = scan_version(version, ver, qv);
4454 if(ckWARN(WARN_MISC))
4455 Perl_warner(aTHX_ packWARN(WARN_MISC),
4456 "Version string '%s' contains invalid data; "
4457 "ignoring: '%s'", version, s);
4465 Validates that the SV contains a valid version object.
4467 bool vverify(SV *vobj);
4469 Note that it only confirms the bare minimum structure (so as not to get
4470 confused by derived classes which may contain additional hash entries):
4474 =item * The SV contains a [reference to a] hash
4476 =item * The hash contains a "version" key
4478 =item * The "version" key has [a reference to] an AV as its value
4486 Perl_vverify(pTHX_ SV *vs)
4492 /* see if the appropriate elements exist */
4493 if ( SvTYPE(vs) == SVt_PVHV
4494 && hv_exists((HV*)vs, "version", 7)
4495 && (sv = SvRV(*hv_fetchs((HV*)vs, "version", FALSE)))
4496 && SvTYPE(sv) == SVt_PVAV )
4505 Accepts a version object and returns the normalized floating
4506 point representation. Call like:
4510 NOTE: you can pass either the object directly or the SV
4511 contained within the RV.
4517 Perl_vnumify(pTHX_ SV *vs)
4522 SV * const sv = newSV(0);
4528 Perl_croak(aTHX_ "Invalid version object");
4530 /* see if various flags exist */
4531 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4533 if ( hv_exists((HV*)vs, "width", 5 ) )
4534 width = SvIV(*hv_fetchs((HV*)vs, "width", FALSE));
4539 /* attempt to retrieve the version array */
4540 if ( !(av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE)) ) ) {
4552 digit = SvIV(*av_fetch(av, 0, 0));
4553 Perl_sv_setpvf(aTHX_ sv, "%d.", (int)PERL_ABS(digit));
4554 for ( i = 1 ; i < len ; i++ )
4556 digit = SvIV(*av_fetch(av, i, 0));
4558 const int denom = (width == 2 ? 10 : 100);
4559 const div_t term = div((int)PERL_ABS(digit),denom);
4560 Perl_sv_catpvf(aTHX_ sv, "%0*d_%d", width, term.quot, term.rem);
4563 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4569 digit = SvIV(*av_fetch(av, len, 0));
4570 if ( alpha && width == 3 ) /* alpha version */
4572 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4576 sv_catpvs(sv, "000");
4584 Accepts a version object and returns the normalized string
4585 representation. Call like:
4589 NOTE: you can pass either the object directly or the SV
4590 contained within the RV.
4596 Perl_vnormal(pTHX_ SV *vs)
4600 SV * const sv = newSV(0);
4606 Perl_croak(aTHX_ "Invalid version object");
4608 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4610 av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE));
4618 digit = SvIV(*av_fetch(av, 0, 0));
4619 Perl_sv_setpvf(aTHX_ sv, "v%"IVdf, (IV)digit);
4620 for ( i = 1 ; i < len ; i++ ) {
4621 digit = SvIV(*av_fetch(av, i, 0));
4622 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4627 /* handle last digit specially */
4628 digit = SvIV(*av_fetch(av, len, 0));
4630 Perl_sv_catpvf(aTHX_ sv, "_%"IVdf, (IV)digit);
4632 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4635 if ( len <= 2 ) { /* short version, must be at least three */
4636 for ( len = 2 - len; len != 0; len-- )
4643 =for apidoc vstringify
4645 In order to maintain maximum compatibility with earlier versions
4646 of Perl, this function will return either the floating point
4647 notation or the multiple dotted notation, depending on whether
4648 the original version contained 1 or more dots, respectively
4654 Perl_vstringify(pTHX_ SV *vs)
4661 Perl_croak(aTHX_ "Invalid version object");
4663 pv = *hv_fetchs((HV*)vs, "original", FALSE);
4667 return &PL_sv_undef;
4673 Version object aware cmp. Both operands must already have been
4674 converted into version objects.
4680 Perl_vcmp(pTHX_ SV *lhv, SV *rhv)
4683 bool lalpha = FALSE;
4684 bool ralpha = FALSE;
4693 if ( !vverify(lhv) )
4694 Perl_croak(aTHX_ "Invalid version object");
4696 if ( !vverify(rhv) )
4697 Perl_croak(aTHX_ "Invalid version object");
4699 /* get the left hand term */
4700 lav = (AV *)SvRV(*hv_fetchs((HV*)lhv, "version", FALSE));
4701 if ( hv_exists((HV*)lhv, "alpha", 5 ) )
4704 /* and the right hand term */
4705 rav = (AV *)SvRV(*hv_fetchs((HV*)rhv, "version", FALSE));
4706 if ( hv_exists((HV*)rhv, "alpha", 5 ) )
4714 while ( i <= m && retval == 0 )
4716 left = SvIV(*av_fetch(lav,i,0));
4717 right = SvIV(*av_fetch(rav,i,0));
4725 /* tiebreaker for alpha with identical terms */
4726 if ( retval == 0 && l == r && left == right && ( lalpha || ralpha ) )
4728 if ( lalpha && !ralpha )
4732 else if ( ralpha && !lalpha)
4738 if ( l != r && retval == 0 ) /* possible match except for trailing 0's */
4742 while ( i <= r && retval == 0 )
4744 if ( SvIV(*av_fetch(rav,i,0)) != 0 )
4745 retval = -1; /* not a match after all */
4751 while ( i <= l && retval == 0 )
4753 if ( SvIV(*av_fetch(lav,i,0)) != 0 )
4754 retval = +1; /* not a match after all */
4762 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
4763 # define EMULATE_SOCKETPAIR_UDP
4766 #ifdef EMULATE_SOCKETPAIR_UDP
4768 S_socketpair_udp (int fd[2]) {
4770 /* Fake a datagram socketpair using UDP to localhost. */
4771 int sockets[2] = {-1, -1};
4772 struct sockaddr_in addresses[2];
4774 Sock_size_t size = sizeof(struct sockaddr_in);
4775 unsigned short port;
4778 memset(&addresses, 0, sizeof(addresses));
4781 sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
4782 if (sockets[i] == -1)
4783 goto tidy_up_and_fail;
4785 addresses[i].sin_family = AF_INET;
4786 addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4787 addresses[i].sin_port = 0; /* kernel choses port. */
4788 if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
4789 sizeof(struct sockaddr_in)) == -1)
4790 goto tidy_up_and_fail;
4793 /* Now have 2 UDP sockets. Find out which port each is connected to, and
4794 for each connect the other socket to it. */
4797 if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
4799 goto tidy_up_and_fail;
4800 if (size != sizeof(struct sockaddr_in))
4801 goto abort_tidy_up_and_fail;
4802 /* !1 is 0, !0 is 1 */
4803 if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
4804 sizeof(struct sockaddr_in)) == -1)
4805 goto tidy_up_and_fail;
4808 /* Now we have 2 sockets connected to each other. I don't trust some other
4809 process not to have already sent a packet to us (by random) so send
4810 a packet from each to the other. */
4813 /* I'm going to send my own port number. As a short.
4814 (Who knows if someone somewhere has sin_port as a bitfield and needs
4815 this routine. (I'm assuming crays have socketpair)) */
4816 port = addresses[i].sin_port;
4817 got = PerlLIO_write(sockets[i], &port, sizeof(port));
4818 if (got != sizeof(port)) {
4820 goto tidy_up_and_fail;
4821 goto abort_tidy_up_and_fail;
4825 /* Packets sent. I don't trust them to have arrived though.
4826 (As I understand it Solaris TCP stack is multithreaded. Non-blocking
4827 connect to localhost will use a second kernel thread. In 2.6 the
4828 first thread running the connect() returns before the second completes,
4829 so EINPROGRESS> In 2.7 the improved stack is faster and connect()
4830 returns 0. Poor programs have tripped up. One poor program's authors'
4831 had a 50-1 reverse stock split. Not sure how connected these were.)
4832 So I don't trust someone not to have an unpredictable UDP stack.
4836 struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
4837 int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
4841 FD_SET((unsigned int)sockets[0], &rset);
4842 FD_SET((unsigned int)sockets[1], &rset);
4844 got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
4845 if (got != 2 || !FD_ISSET(sockets[0], &rset)
4846 || !FD_ISSET(sockets[1], &rset)) {
4847 /* I hope this is portable and appropriate. */
4849 goto tidy_up_and_fail;
4850 goto abort_tidy_up_and_fail;
4854 /* And the paranoia department even now doesn't trust it to have arrive
4855 (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
4857 struct sockaddr_in readfrom;
4858 unsigned short buffer[2];
4863 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4864 sizeof(buffer), MSG_DONTWAIT,
4865 (struct sockaddr *) &readfrom, &size);
4867 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4869 (struct sockaddr *) &readfrom, &size);
4873 goto tidy_up_and_fail;
4874 if (got != sizeof(port)
4875 || size != sizeof(struct sockaddr_in)
4876 /* Check other socket sent us its port. */
4877 || buffer[0] != (unsigned short) addresses[!i].sin_port
4878 /* Check kernel says we got the datagram from that socket */
4879 || readfrom.sin_family != addresses[!i].sin_family
4880 || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
4881 || readfrom.sin_port != addresses[!i].sin_port)
4882 goto abort_tidy_up_and_fail;
4885 /* My caller (my_socketpair) has validated that this is non-NULL */
4888 /* I hereby declare this connection open. May God bless all who cross
4892 abort_tidy_up_and_fail:
4893 errno = ECONNABORTED;
4896 const int save_errno = errno;
4897 if (sockets[0] != -1)
4898 PerlLIO_close(sockets[0]);
4899 if (sockets[1] != -1)
4900 PerlLIO_close(sockets[1]);
4905 #endif /* EMULATE_SOCKETPAIR_UDP */
4907 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
4909 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4910 /* Stevens says that family must be AF_LOCAL, protocol 0.
4911 I'm going to enforce that, then ignore it, and use TCP (or UDP). */
4916 struct sockaddr_in listen_addr;
4917 struct sockaddr_in connect_addr;
4922 || family != AF_UNIX
4925 errno = EAFNOSUPPORT;
4933 #ifdef EMULATE_SOCKETPAIR_UDP
4934 if (type == SOCK_DGRAM)
4935 return S_socketpair_udp(fd);
4938 listener = PerlSock_socket(AF_INET, type, 0);
4941 memset(&listen_addr, 0, sizeof(listen_addr));
4942 listen_addr.sin_family = AF_INET;
4943 listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4944 listen_addr.sin_port = 0; /* kernel choses port. */
4945 if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
4946 sizeof(listen_addr)) == -1)
4947 goto tidy_up_and_fail;
4948 if (PerlSock_listen(listener, 1) == -1)
4949 goto tidy_up_and_fail;
4951 connector = PerlSock_socket(AF_INET, type, 0);
4952 if (connector == -1)
4953 goto tidy_up_and_fail;
4954 /* We want to find out the port number to connect to. */
4955 size = sizeof(connect_addr);
4956 if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
4958 goto tidy_up_and_fail;
4959 if (size != sizeof(connect_addr))
4960 goto abort_tidy_up_and_fail;
4961 if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
4962 sizeof(connect_addr)) == -1)
4963 goto tidy_up_and_fail;
4965 size = sizeof(listen_addr);
4966 acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
4969 goto tidy_up_and_fail;
4970 if (size != sizeof(listen_addr))
4971 goto abort_tidy_up_and_fail;
4972 PerlLIO_close(listener);
4973 /* Now check we are talking to ourself by matching port and host on the
4975 if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
4977 goto tidy_up_and_fail;
4978 if (size != sizeof(connect_addr)
4979 || listen_addr.sin_family != connect_addr.sin_family
4980 || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
4981 || listen_addr.sin_port != connect_addr.sin_port) {
4982 goto abort_tidy_up_and_fail;
4988 abort_tidy_up_and_fail:
4990 errno = ECONNABORTED; /* This would be the standard thing to do. */
4992 # ifdef ECONNREFUSED
4993 errno = ECONNREFUSED; /* E.g. Symbian does not have ECONNABORTED. */
4995 errno = ETIMEDOUT; /* Desperation time. */
5000 const int save_errno = errno;
5002 PerlLIO_close(listener);
5003 if (connector != -1)
5004 PerlLIO_close(connector);
5006 PerlLIO_close(acceptor);
5012 /* In any case have a stub so that there's code corresponding
5013 * to the my_socketpair in global.sym. */
5015 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
5016 #ifdef HAS_SOCKETPAIR
5017 return socketpair(family, type, protocol, fd);
5026 =for apidoc sv_nosharing
5028 Dummy routine which "shares" an SV when there is no sharing module present.
5029 Or "locks" it. Or "unlocks" it. In other words, ignores its single SV argument.
5030 Exists to avoid test for a NULL function pointer and because it could
5031 potentially warn under some level of strict-ness.
5037 Perl_sv_nosharing(pTHX_ SV *sv)
5039 PERL_UNUSED_CONTEXT;
5040 PERL_UNUSED_ARG(sv);
5044 Perl_parse_unicode_opts(pTHX_ const char **popt)
5046 const char *p = *popt;
5051 opt = (U32) atoi(p);
5054 if (*p && *p != '\n' && *p != '\r')
5055 Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
5060 case PERL_UNICODE_STDIN:
5061 opt |= PERL_UNICODE_STDIN_FLAG; break;
5062 case PERL_UNICODE_STDOUT:
5063 opt |= PERL_UNICODE_STDOUT_FLAG; break;
5064 case PERL_UNICODE_STDERR:
5065 opt |= PERL_UNICODE_STDERR_FLAG; break;
5066 case PERL_UNICODE_STD:
5067 opt |= PERL_UNICODE_STD_FLAG; break;
5068 case PERL_UNICODE_IN:
5069 opt |= PERL_UNICODE_IN_FLAG; break;
5070 case PERL_UNICODE_OUT:
5071 opt |= PERL_UNICODE_OUT_FLAG; break;
5072 case PERL_UNICODE_INOUT:
5073 opt |= PERL_UNICODE_INOUT_FLAG; break;
5074 case PERL_UNICODE_LOCALE:
5075 opt |= PERL_UNICODE_LOCALE_FLAG; break;
5076 case PERL_UNICODE_ARGV:
5077 opt |= PERL_UNICODE_ARGV_FLAG; break;
5078 case PERL_UNICODE_UTF8CACHEASSERT:
5079 opt |= PERL_UNICODE_UTF8CACHEASSERT_FLAG; break;
5081 if (*p != '\n' && *p != '\r')
5083 "Unknown Unicode option letter '%c'", *p);
5089 opt = PERL_UNICODE_DEFAULT_FLAGS;
5091 if (opt & ~PERL_UNICODE_ALL_FLAGS)
5092 Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
5093 (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
5105 * This is really just a quick hack which grabs various garbage
5106 * values. It really should be a real hash algorithm which
5107 * spreads the effect of every input bit onto every output bit,
5108 * if someone who knows about such things would bother to write it.
5109 * Might be a good idea to add that function to CORE as well.
5110 * No numbers below come from careful analysis or anything here,
5111 * except they are primes and SEED_C1 > 1E6 to get a full-width
5112 * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
5113 * probably be bigger too.
5116 # define SEED_C1 1000003
5117 #define SEED_C4 73819
5119 # define SEED_C1 25747
5120 #define SEED_C4 20639
5124 #define SEED_C5 26107
5126 #ifndef PERL_NO_DEV_RANDOM
5131 # include <starlet.h>
5132 /* when[] = (low 32 bits, high 32 bits) of time since epoch
5133 * in 100-ns units, typically incremented ever 10 ms. */
5134 unsigned int when[2];
5136 # ifdef HAS_GETTIMEOFDAY
5137 struct timeval when;
5143 /* This test is an escape hatch, this symbol isn't set by Configure. */
5144 #ifndef PERL_NO_DEV_RANDOM
5145 #ifndef PERL_RANDOM_DEVICE
5146 /* /dev/random isn't used by default because reads from it will block
5147 * if there isn't enough entropy available. You can compile with
5148 * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there
5149 * is enough real entropy to fill the seed. */
5150 # define PERL_RANDOM_DEVICE "/dev/urandom"
5152 fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0);
5154 if (PerlLIO_read(fd, (void*)&u, sizeof u) != sizeof u)
5163 _ckvmssts(sys$gettim(when));
5164 u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1];
5166 # ifdef HAS_GETTIMEOFDAY
5167 PerlProc_gettimeofday(&when,NULL);
5168 u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec;
5171 u = (U32)SEED_C1 * when;
5174 u += SEED_C3 * (U32)PerlProc_getpid();
5175 u += SEED_C4 * (U32)PTR2UV(PL_stack_sp);
5176 #ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */
5177 u += SEED_C5 * (U32)PTR2UV(&when);
5183 Perl_get_hash_seed(pTHX)
5186 const char *s = PerlEnv_getenv("PERL_HASH_SEED");
5192 if (s && isDIGIT(*s))
5193 myseed = (UV)Atoul(s);
5195 #ifdef USE_HASH_SEED_EXPLICIT
5199 /* Compute a random seed */
5200 (void)seedDrand01((Rand_seed_t)seed());
5201 myseed = (UV)(Drand01() * (NV)UV_MAX);
5202 #if RANDBITS < (UVSIZE * 8)
5203 /* Since there are not enough randbits to to reach all
5204 * the bits of a UV, the low bits might need extra
5205 * help. Sum in another random number that will
5206 * fill in the low bits. */
5208 (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
5209 #endif /* RANDBITS < (UVSIZE * 8) */
5210 if (myseed == 0) { /* Superparanoia. */
5211 myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */
5213 Perl_croak(aTHX_ "Your random numbers are not that random");
5216 PL_rehash_seed_set = TRUE;
5223 Perl_stashpv_hvname_match(pTHX_ const COP *c, const HV *hv)
5225 const char * const stashpv = CopSTASHPV(c);
5226 const char * const name = HvNAME_get(hv);
5227 PERL_UNUSED_CONTEXT;
5229 if (stashpv == name)
5231 if (stashpv && name)
5232 if (strEQ(stashpv, name))
5239 #ifdef PERL_GLOBAL_STRUCT
5241 #define PERL_GLOBAL_STRUCT_INIT
5242 #include "opcode.h" /* the ppaddr and check */
5245 Perl_init_global_struct(pTHX)
5247 struct perl_vars *plvarsp = NULL;
5248 # ifdef PERL_GLOBAL_STRUCT
5249 const IV nppaddr = sizeof(Gppaddr)/sizeof(Perl_ppaddr_t);
5250 const IV ncheck = sizeof(Gcheck) /sizeof(Perl_check_t);
5251 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
5252 /* PerlMem_malloc() because can't use even safesysmalloc() this early. */
5253 plvarsp = (struct perl_vars*)PerlMem_malloc(sizeof(struct perl_vars));
5257 plvarsp = PL_VarsPtr;
5258 # endif /* PERL_GLOBAL_STRUCT_PRIVATE */
5264 # define PERLVAR(var,type) /**/
5265 # define PERLVARA(var,n,type) /**/
5266 # define PERLVARI(var,type,init) plvarsp->var = init;
5267 # define PERLVARIC(var,type,init) plvarsp->var = init;
5268 # define PERLVARISC(var,init) Copy(init, plvarsp->var, sizeof(init), char);
5269 # include "perlvars.h"
5275 # ifdef PERL_GLOBAL_STRUCT
5278 PerlMem_malloc(nppaddr * sizeof(Perl_ppaddr_t));
5279 if (!plvarsp->Gppaddr)
5283 PerlMem_malloc(ncheck * sizeof(Perl_check_t));
5284 if (!plvarsp->Gcheck)
5286 Copy(Gppaddr, plvarsp->Gppaddr, nppaddr, Perl_ppaddr_t);
5287 Copy(Gcheck, plvarsp->Gcheck, ncheck, Perl_check_t);
5289 # ifdef PERL_SET_VARS
5290 PERL_SET_VARS(plvarsp);
5292 # undef PERL_GLOBAL_STRUCT_INIT
5297 #endif /* PERL_GLOBAL_STRUCT */
5299 #ifdef PERL_GLOBAL_STRUCT
5302 Perl_free_global_struct(pTHX_ struct perl_vars *plvarsp)
5304 # ifdef PERL_GLOBAL_STRUCT
5305 # ifdef PERL_UNSET_VARS
5306 PERL_UNSET_VARS(plvarsp);
5308 free(plvarsp->Gppaddr);
5309 free(plvarsp->Gcheck);
5310 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
5316 #endif /* PERL_GLOBAL_STRUCT */
5321 * PERL_MEM_LOG: the Perl_mem_log_..() will be compiled.
5323 * PERL_MEM_LOG_ENV: if defined, during run time the environment
5324 * variable PERL_MEM_LOG will be consulted, and if the integer value
5325 * of that is true, the logging will happen. (The default is to
5326 * always log if the PERL_MEM_LOG define was in effect.)
5330 * PERL_MEM_LOG_SPRINTF_BUF_SIZE: size of a (stack-allocated) buffer
5331 * the Perl_mem_log_...() will use (either via sprintf or snprintf).
5333 #define PERL_MEM_LOG_SPRINTF_BUF_SIZE 128
5336 * PERL_MEM_LOG_FD: the file descriptor the Perl_mem_log_...() will
5337 * log to. You can also define in compile time PERL_MEM_LOG_ENV_FD,
5338 * in which case the environment variable PERL_MEM_LOG_FD will be
5339 * consulted for the file descriptor number to use.
5341 #ifndef PERL_MEM_LOG_FD
5342 # define PERL_MEM_LOG_FD 2 /* If STDERR is too boring for you. */
5346 Perl_mem_log_alloc(const UV n, const UV typesize, const char *typename, Malloc_t newalloc, const char *filename, const int linenumber, const char *funcname)
5348 #ifdef PERL_MEM_LOG_STDERR
5349 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5352 # ifdef PERL_MEM_LOG_ENV
5353 s = getenv("PERL_MEM_LOG");
5354 if (s ? atoi(s) : 0)
5357 /* We can't use SVs or PerlIO for obvious reasons,
5358 * so we'll use stdio and low-level IO instead. */
5359 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5360 # ifdef PERL_MEM_LOG_TIMESTAMP
5362 # ifdef HAS_GETTIMEOFDAY
5363 gettimeofday(&tv, 0);
5365 /* If there are other OS specific ways of hires time than
5366 * gettimeofday() (see ext/Time/HiRes), the easiest way is
5367 * probably that they would be used to fill in the struct
5374 # ifdef PERL_MEM_LOG_TIMESTAMP
5377 "alloc: %s:%d:%s: %"IVdf" %"UVuf
5378 " %s = %"IVdf": %"UVxf"\n",
5379 # ifdef PERL_MEM_LOG_TIMESTAMP
5380 (int)tv.tv_sec, (int)tv.tv_usec,
5382 filename, linenumber, funcname, n, typesize,
5383 typename, n * typesize, PTR2UV(newalloc));
5384 # ifdef PERL_MEM_LOG_ENV_FD
5385 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5386 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5388 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5397 Perl_mem_log_realloc(const UV n, const UV typesize, const char *typename, Malloc_t oldalloc, Malloc_t newalloc, const char *filename, const int linenumber, const char *funcname)
5399 #ifdef PERL_MEM_LOG_STDERR
5400 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5403 # ifdef PERL_MEM_LOG_ENV
5404 s = PerlEnv_getenv("PERL_MEM_LOG");
5405 if (s ? atoi(s) : 0)
5408 /* We can't use SVs or PerlIO for obvious reasons,
5409 * so we'll use stdio and low-level IO instead. */
5410 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5411 # ifdef PERL_MEM_LOG_TIMESTAMP
5413 gettimeofday(&tv, 0);
5419 # ifdef PERL_MEM_LOG_TIMESTAMP
5422 "realloc: %s:%d:%s: %"IVdf" %"UVuf
5423 " %s = %"IVdf": %"UVxf" -> %"UVxf"\n",
5424 # ifdef PERL_MEM_LOG_TIMESTAMP
5425 (int)tv.tv_sec, (int)tv.tv_usec,
5427 filename, linenumber, funcname, n, typesize,
5428 typename, n * typesize, PTR2UV(oldalloc),
5430 # ifdef PERL_MEM_LOG_ENV_FD
5431 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5432 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5434 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5443 Perl_mem_log_free(Malloc_t oldalloc, const char *filename, const int linenumber, const char *funcname)
5445 #ifdef PERL_MEM_LOG_STDERR
5446 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5449 # ifdef PERL_MEM_LOG_ENV
5450 s = PerlEnv_getenv("PERL_MEM_LOG");
5451 if (s ? atoi(s) : 0)
5454 /* We can't use SVs or PerlIO for obvious reasons,
5455 * so we'll use stdio and low-level IO instead. */
5456 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5457 # ifdef PERL_MEM_LOG_TIMESTAMP
5459 gettimeofday(&tv, 0);
5465 # ifdef PERL_MEM_LOG_TIMESTAMP
5468 "free: %s:%d:%s: %"UVxf"\n",
5469 # ifdef PERL_MEM_LOG_TIMESTAMP
5470 (int)tv.tv_sec, (int)tv.tv_usec,
5472 filename, linenumber, funcname,
5474 # ifdef PERL_MEM_LOG_ENV_FD
5475 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5476 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5478 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5486 #endif /* PERL_MEM_LOG */
5489 =for apidoc my_sprintf
5491 The C library C<sprintf>, wrapped if necessary, to ensure that it will return
5492 the length of the string written to the buffer. Only rare pre-ANSI systems
5493 need the wrapper function - usually this is a direct call to C<sprintf>.
5497 #ifndef SPRINTF_RETURNS_STRLEN
5499 Perl_my_sprintf(char *buffer, const char* pat, ...)
5502 va_start(args, pat);
5503 vsprintf(buffer, pat, args);
5505 return strlen(buffer);
5510 =for apidoc my_snprintf
5512 The C library C<snprintf> functionality, if available and
5513 standards-compliant (uses C<vsnprintf>, actually). However, if the
5514 C<vsnprintf> is not available, will unfortunately use the unsafe
5515 C<vsprintf> which can overrun the buffer (there is an overrun check,
5516 but that may be too late). Consider using C<sv_vcatpvf> instead, or
5517 getting C<vsnprintf>.
5522 Perl_my_snprintf(char *buffer, const Size_t len, const char *format, ...)
5527 va_start(ap, format);
5528 #ifdef HAS_VSNPRINTF
5529 retval = vsnprintf(buffer, len, format, ap);
5531 retval = vsprintf(buffer, format, ap);
5534 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5535 if (retval < 0 || (len > 0 && (Size_t)retval >= len))
5536 Perl_croak(aTHX_ "panic: my_snprintf buffer overflow");
5541 =for apidoc my_vsnprintf
5543 The C library C<vsnprintf> if available and standards-compliant.
5544 However, if if the C<vsnprintf> is not available, will unfortunately
5545 use the unsafe C<vsprintf> which can overrun the buffer (there is an
5546 overrun check, but that may be too late). Consider using
5547 C<sv_vcatpvf> instead, or getting C<vsnprintf>.
5552 Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap)
5558 Perl_va_copy(ap, apc);
5559 # ifdef HAS_VSNPRINTF
5560 retval = vsnprintf(buffer, len, format, apc);
5562 retval = vsprintf(buffer, format, apc);
5565 # ifdef HAS_VSNPRINTF
5566 retval = vsnprintf(buffer, len, format, ap);
5568 retval = vsprintf(buffer, format, ap);
5570 #endif /* #ifdef NEED_VA_COPY */
5571 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5572 if (retval < 0 || (len > 0 && (Size_t)retval >= len))
5573 Perl_croak(aTHX_ "panic: my_vsnprintf buffer overflow");
5578 Perl_my_clearenv(pTHX)
5581 #if ! defined(PERL_MICRO)
5582 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
5584 # else /* ! (PERL_IMPLICIT_SYS || WIN32) */
5585 # if defined(USE_ENVIRON_ARRAY)
5586 # if defined(USE_ITHREADS)
5587 /* only the parent thread can clobber the process environment */
5588 if (PL_curinterp == aTHX)
5589 # endif /* USE_ITHREADS */
5591 # if ! defined(PERL_USE_SAFE_PUTENV)
5592 if ( !PL_use_safe_putenv) {
5594 if (environ == PL_origenviron)
5595 environ = (char**)safesysmalloc(sizeof(char*));
5597 for (i = 0; environ[i]; i++)
5598 (void)safesysfree(environ[i]);
5601 # else /* PERL_USE_SAFE_PUTENV */
5602 # if defined(HAS_CLEARENV)
5604 # elif defined(HAS_UNSETENV)
5605 int bsiz = 80; /* Most envvar names will be shorter than this. */
5606 int bufsiz = bsiz * sizeof(char); /* sizeof(char) paranoid? */
5607 char *buf = (char*)safesysmalloc(bufsiz);
5608 while (*environ != NULL) {
5609 char *e = strchr(*environ, '=');
5610 int l = e ? e - *environ : (int)strlen(*environ);
5612 (void)safesysfree(buf);
5613 bsiz = l + 1; /* + 1 for the \0. */
5614 buf = (char*)safesysmalloc(bufsiz);
5616 my_strlcpy(buf, *environ, l + 1);
5617 (void)unsetenv(buf);
5619 (void)safesysfree(buf);
5620 # else /* ! HAS_CLEARENV && ! HAS_UNSETENV */
5621 /* Just null environ and accept the leakage. */
5623 # endif /* HAS_CLEARENV || HAS_UNSETENV */
5624 # endif /* ! PERL_USE_SAFE_PUTENV */
5626 # endif /* USE_ENVIRON_ARRAY */
5627 # endif /* PERL_IMPLICIT_SYS || WIN32 */
5628 #endif /* PERL_MICRO */
5631 #ifdef PERL_IMPLICIT_CONTEXT
5633 /* Implements the MY_CXT_INIT macro. The first time a module is loaded,
5634 the global PL_my_cxt_index is incremented, and that value is assigned to
5635 that module's static my_cxt_index (who's address is passed as an arg).
5636 Then, for each interpreter this function is called for, it makes sure a
5637 void* slot is available to hang the static data off, by allocating or
5638 extending the interpreter's PL_my_cxt_list array */
5640 #ifndef PERL_GLOBAL_STRUCT_PRIVATE
5642 Perl_my_cxt_init(pTHX_ int *index, size_t size)
5647 /* this module hasn't been allocated an index yet */
5648 MUTEX_LOCK(&PL_my_ctx_mutex);
5649 *index = PL_my_cxt_index++;
5650 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5653 /* make sure the array is big enough */
5654 if (PL_my_cxt_size <= *index) {
5655 if (PL_my_cxt_size) {
5656 while (PL_my_cxt_size <= *index)
5657 PL_my_cxt_size *= 2;
5658 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5661 PL_my_cxt_size = 16;
5662 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5665 /* newSV() allocates one more than needed */
5666 p = (void*)SvPVX(newSV(size-1));
5667 PL_my_cxt_list[*index] = p;
5668 Zero(p, size, char);
5672 #else /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */
5675 Perl_my_cxt_index(pTHX_ const char *my_cxt_key)
5680 for (index = 0; index < PL_my_cxt_index; index++) {
5681 const char *key = PL_my_cxt_keys[index];
5682 /* try direct pointer compare first - there are chances to success,
5683 * and it's much faster.
5685 if ((key == my_cxt_key) || strEQ(key, my_cxt_key))
5692 Perl_my_cxt_init(pTHX_ const char *my_cxt_key, size_t size)
5698 index = Perl_my_cxt_index(aTHX_ my_cxt_key);
5700 /* this module hasn't been allocated an index yet */
5701 MUTEX_LOCK(&PL_my_ctx_mutex);
5702 index = PL_my_cxt_index++;
5703 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5706 /* make sure the array is big enough */
5707 if (PL_my_cxt_size <= index) {
5708 int old_size = PL_my_cxt_size;
5710 if (PL_my_cxt_size) {
5711 while (PL_my_cxt_size <= index)
5712 PL_my_cxt_size *= 2;
5713 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5714 Renew(PL_my_cxt_keys, PL_my_cxt_size, const char *);
5717 PL_my_cxt_size = 16;
5718 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5719 Newx(PL_my_cxt_keys, PL_my_cxt_size, const char *);
5721 for (i = old_size; i < PL_my_cxt_size; i++) {
5722 PL_my_cxt_keys[i] = 0;
5723 PL_my_cxt_list[i] = 0;
5726 PL_my_cxt_keys[index] = my_cxt_key;
5727 /* newSV() allocates one more than needed */
5728 p = (void*)SvPVX(newSV(size-1));
5729 PL_my_cxt_list[index] = p;
5730 Zero(p, size, char);
5733 #endif /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */
5734 #endif /* PERL_IMPLICIT_CONTEXT */
5738 Perl_my_strlcat(char *dst, const char *src, Size_t size)
5740 Size_t used, length, copy;
5743 length = strlen(src);
5744 if (size > 0 && used < size - 1) {
5745 copy = (length >= size - used) ? size - used - 1 : length;
5746 memcpy(dst + used, src, copy);
5747 dst[used + copy] = '\0';
5749 return used + length;
5755 Perl_my_strlcpy(char *dst, const char *src, Size_t size)
5757 Size_t length, copy;
5759 length = strlen(src);
5761 copy = (length >= size) ? size - 1 : length;
5762 memcpy(dst, src, copy);
5769 #if defined(_MSC_VER) && (_MSC_VER >= 1300) && (_MSC_VER < 1400) && (WINVER < 0x0500)
5770 /* VC7 or 7.1, building with pre-VC7 runtime libraries. */
5771 long _ftol( double ); /* Defined by VC6 C libs. */
5772 long _ftol2( double dblSource ) { return _ftol( dblSource ); }
5776 Perl_get_db_sub(pTHX_ SV **svp, CV *cv)
5779 SV * const dbsv = GvSVn(PL_DBsub);
5780 /* We do not care about using sv to call CV;
5781 * it's for informational purposes only.
5785 if (!PERLDB_SUB_NN) {
5786 GV * const gv = CvGV(cv);
5788 if ( svp && ((CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
5789 || strEQ(GvNAME(gv), "END")
5790 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
5791 !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv) )))) {
5792 /* Use GV from the stack as a fallback. */
5793 /* GV is potentially non-unique, or contain different CV. */
5794 SV * const tmp = newRV((SV*)cv);
5795 sv_setsv(dbsv, tmp);
5799 gv_efullname3(dbsv, gv, NULL);
5803 const int type = SvTYPE(dbsv);
5804 if (type < SVt_PVIV && type != SVt_IV)
5805 sv_upgrade(dbsv, SVt_PVIV);
5806 (void)SvIOK_on(dbsv);
5807 SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */
5812 Perl_my_dirfd(pTHX_ DIR * dir) {
5814 /* Most dirfd implementations have problems when passed NULL. */
5819 #elif defined(HAS_DIR_DD_FD)
5822 Perl_die(aTHX_ PL_no_func, "dirfd");
5830 * c-indentation-style: bsd
5832 * indent-tabs-mode: t
5835 * ex: set ts=8 sts=4 sw=4 noet: