3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 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
17 #define PERL_IN_UTIL_C
21 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
26 # define SIG_ERR ((Sighandler_t) -1)
31 # include <sys/wait.h>
36 # include <sys/select.h>
42 #if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
43 # define FD_CLOEXEC 1 /* NeXT needs this */
46 /* NOTE: Do not call the next three routines directly. Use the macros
47 * in handy.h, so that we can easily redefine everything to do tracking of
48 * allocated hunks back to the original New to track down any memory leaks.
49 * XXX This advice seems to be widely ignored :-( --AD August 1996.
52 /* paranoid version of system's malloc() */
55 Perl_safesysmalloc(MEM_SIZE size)
61 PerlIO_printf(Perl_error_log,
62 "Allocation too large: %lx\n", size) FLUSH;
65 #endif /* HAS_64K_LIMIT */
68 Perl_croak_nocontext("panic: malloc");
70 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
71 PERL_ALLOC_CHECK(ptr);
72 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
78 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
85 /* paranoid version of system's realloc() */
88 Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
92 #if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
93 Malloc_t PerlMem_realloc();
94 #endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
98 PerlIO_printf(Perl_error_log,
99 "Reallocation too large: %lx\n", size) FLUSH;
102 #endif /* HAS_64K_LIMIT */
109 return safesysmalloc(size);
112 Perl_croak_nocontext("panic: realloc");
114 ptr = (Malloc_t)PerlMem_realloc(where,size);
115 PERL_ALLOC_CHECK(ptr);
117 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
118 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
125 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
132 /* safe version of system's free() */
135 Perl_safesysfree(Malloc_t where)
137 #ifdef PERL_IMPLICIT_SYS
140 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
147 /* safe version of system's calloc() */
150 Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
156 if (size * count > 0xffff) {
157 PerlIO_printf(Perl_error_log,
158 "Allocation too large: %lx\n", size * count) FLUSH;
161 #endif /* HAS_64K_LIMIT */
163 if ((long)size < 0 || (long)count < 0)
164 Perl_croak_nocontext("panic: calloc");
167 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
168 PERL_ALLOC_CHECK(ptr);
169 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)size));
171 memset((void*)ptr, 0, size);
177 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
184 /* These must be defined when not using Perl's malloc for binary
189 Malloc_t Perl_malloc (MEM_SIZE nbytes)
192 return (Malloc_t)PerlMem_malloc(nbytes);
195 Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
198 return (Malloc_t)PerlMem_calloc(elements, size);
201 Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
204 return (Malloc_t)PerlMem_realloc(where, nbytes);
207 Free_t Perl_mfree (Malloc_t where)
215 /* copy a string up to some (non-backslashed) delimiter, if any */
218 Perl_delimcpy(pTHX_ register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen)
221 for (tolen = 0; from < fromend; from++, tolen++) {
223 if (from[1] == delim)
232 else if (*from == delim)
243 /* return ptr to little string in big string, NULL if not found */
244 /* This routine was donated by Corey Satten. */
247 Perl_instr(pTHX_ register const char *big, register const char *little)
249 register const char *s, *x;
260 for (x=big,s=little; *s; /**/ ) {
269 return (char*)(big-1);
274 /* same as instr but allow embedded nulls */
277 Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
279 register const char *s, *x;
280 register I32 first = *little;
281 register const char *littleend = lend;
283 if (!first && little >= littleend)
285 if (bigend - big < littleend - little)
287 bigend -= littleend - little++;
288 while (big <= bigend) {
291 for (x=big,s=little; s < littleend; /**/ ) {
298 return (char*)(big-1);
303 /* reverse of the above--find last substring */
306 Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
308 register const char *bigbeg;
309 register const char *s, *x;
310 register I32 first = *little;
311 register const char *littleend = lend;
313 if (!first && little >= littleend)
314 return (char*)bigend;
316 big = bigend - (littleend - little++);
317 while (big >= bigbeg) {
320 for (x=big+2,s=little; s < littleend; /**/ ) {
327 return (char*)(big+1);
332 #define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
334 /* As a space optimization, we do not compile tables for strings of length
335 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
336 special-cased in fbm_instr().
338 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
341 =head1 Miscellaneous Functions
343 =for apidoc fbm_compile
345 Analyses the string in order to make fast searches on it using fbm_instr()
346 -- the Boyer-Moore algorithm.
352 Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
361 if (flags & FBMcf_TAIL) {
362 MAGIC *mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
363 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
364 if (mg && mg->mg_len >= 0)
367 s = (U8*)SvPV_force(sv, len);
368 (void)SvUPGRADE(sv, SVt_PVBM);
369 if (len == 0) /* TAIL might be on a zero-length string. */
379 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
380 table = (unsigned char*)(SvPVX(sv) + len + FBM_TABLE_OFFSET);
381 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
382 memset((void*)table, mlen, 256);
383 table[-1] = (U8)flags;
385 sb = s - mlen + 1; /* first char (maybe) */
387 if (table[*s] == mlen)
392 sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */
395 s = (unsigned char*)(SvPVX(sv)); /* deeper magic */
396 for (i = 0; i < len; i++) {
397 if (PL_freq[s[i]] < frequency) {
399 frequency = PL_freq[s[i]];
402 BmRARE(sv) = s[rarest];
403 BmPREVIOUS(sv) = (U16)rarest;
404 BmUSEFUL(sv) = 100; /* Initial value */
405 if (flags & FBMcf_TAIL)
407 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
408 BmRARE(sv),BmPREVIOUS(sv)));
411 /* If SvTAIL(littlestr), it has a fake '\n' at end. */
412 /* If SvTAIL is actually due to \Z or \z, this gives false positives
416 =for apidoc fbm_instr
418 Returns the location of the SV in the string delimited by C<str> and
419 C<strend>. It returns C<Nullch> if the string can't be found. The C<sv>
420 does not have to be fbm_compiled, but the search will not be as fast
427 Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
429 register unsigned char *s;
431 register unsigned char *little = (unsigned char *)SvPV(littlestr,l);
432 register STRLEN littlelen = l;
433 register I32 multiline = flags & FBMrf_MULTILINE;
435 if ((STRLEN)(bigend - big) < littlelen) {
436 if ( SvTAIL(littlestr)
437 && ((STRLEN)(bigend - big) == littlelen - 1)
439 || (*big == *little &&
440 memEQ((char *)big, (char *)little, littlelen - 1))))
445 if (littlelen <= 2) { /* Special-cased */
447 if (littlelen == 1) {
448 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
449 /* Know that bigend != big. */
450 if (bigend[-1] == '\n')
451 return (char *)(bigend - 1);
452 return (char *) bigend;
460 if (SvTAIL(littlestr))
461 return (char *) bigend;
465 return (char*)big; /* Cannot be SvTAIL! */
468 if (SvTAIL(littlestr) && !multiline) {
469 if (bigend[-1] == '\n' && bigend[-2] == *little)
470 return (char*)bigend - 2;
471 if (bigend[-1] == *little)
472 return (char*)bigend - 1;
476 /* This should be better than FBM if c1 == c2, and almost
477 as good otherwise: maybe better since we do less indirection.
478 And we save a lot of memory by caching no table. */
479 register unsigned char c1 = little[0];
480 register unsigned char c2 = little[1];
485 while (s <= bigend) {
495 goto check_1char_anchor;
506 goto check_1char_anchor;
509 while (s <= bigend) {
514 goto check_1char_anchor;
523 check_1char_anchor: /* One char and anchor! */
524 if (SvTAIL(littlestr) && (*bigend == *little))
525 return (char *)bigend; /* bigend is already decremented. */
528 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
529 s = bigend - littlelen;
530 if (s >= big && bigend[-1] == '\n' && *s == *little
531 /* Automatically of length > 2 */
532 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
534 return (char*)s; /* how sweet it is */
537 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
539 return (char*)s + 1; /* how sweet it is */
543 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
544 char *b = ninstr((char*)big,(char*)bigend,
545 (char*)little, (char*)little + littlelen);
547 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
548 /* Chop \n from littlestr: */
549 s = bigend - littlelen + 1;
551 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
560 { /* Do actual FBM. */
561 register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
562 register unsigned char *oldlittle;
564 if (littlelen > (STRLEN)(bigend - big))
566 --littlelen; /* Last char found by table lookup */
569 little += littlelen; /* last char */
576 if ((tmp = table[*s])) {
577 if ((s += tmp) < bigend)
581 else { /* less expensive than calling strncmp() */
582 register unsigned char *olds = s;
587 if (*--s == *--little)
589 s = olds + 1; /* here we pay the price for failure */
591 if (s < bigend) /* fake up continue to outer loop */
599 if ( s == bigend && (table[-1] & FBMcf_TAIL)
600 && memEQ((char *)(bigend - littlelen),
601 (char *)(oldlittle - littlelen), littlelen) )
602 return (char*)bigend - littlelen;
607 /* start_shift, end_shift are positive quantities which give offsets
608 of ends of some substring of bigstr.
609 If `last' we want the last occurrence.
610 old_posp is the way of communication between consequent calls if
611 the next call needs to find the .
612 The initial *old_posp should be -1.
614 Note that we take into account SvTAIL, so one can get extra
615 optimizations if _ALL flag is set.
618 /* If SvTAIL is actually due to \Z or \z, this gives false positives
619 if PL_multiline. In fact if !PL_multiline the authoritative answer
620 is not supported yet. */
623 Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
625 register unsigned char *s, *x;
626 register unsigned char *big;
628 register I32 previous;
630 register unsigned char *little;
631 register I32 stop_pos;
632 register unsigned char *littleend;
636 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
637 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
639 if ( BmRARE(littlestr) == '\n'
640 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
641 little = (unsigned char *)(SvPVX(littlestr));
642 littleend = little + SvCUR(littlestr);
649 little = (unsigned char *)(SvPVX(littlestr));
650 littleend = little + SvCUR(littlestr);
652 /* The value of pos we can start at: */
653 previous = BmPREVIOUS(littlestr);
654 big = (unsigned char *)(SvPVX(bigstr));
655 /* The value of pos we can stop at: */
656 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
657 if (previous + start_shift > stop_pos) {
659 stop_pos does not include SvTAIL in the count, so this check is incorrect
660 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
663 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
668 while (pos < previous + start_shift) {
669 if (!(pos += PL_screamnext[pos]))
674 if (pos >= stop_pos) break;
675 if (big[pos] != first)
677 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
683 if (s == littleend) {
685 if (!last) return (char *)(big+pos);
688 } while ( pos += PL_screamnext[pos] );
690 return (char *)(big+(*old_posp));
692 if (!SvTAIL(littlestr) || (end_shift > 0))
694 /* Ignore the trailing "\n". This code is not microoptimized */
695 big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr));
696 stop_pos = littleend - little; /* Actual littlestr len */
701 && ((stop_pos == 1) ||
702 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
708 Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
710 register U8 *a = (U8 *)s1;
711 register U8 *b = (U8 *)s2;
713 if (*a != *b && *a != PL_fold[*b])
721 Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
723 register U8 *a = (U8 *)s1;
724 register U8 *b = (U8 *)s2;
726 if (*a != *b && *a != PL_fold_locale[*b])
733 /* copy a string to a safe spot */
736 =head1 Memory Management
740 Perl's version of C<strdup()>. Returns a pointer to a newly allocated
741 string which is a duplicate of C<pv>. The size of the string is
742 determined by C<strlen()>. The memory allocated for the new string can
743 be freed with the C<Safefree()> function.
749 Perl_savepv(pTHX_ const char *pv)
751 register char *newaddr = Nullch;
753 New(902,newaddr,strlen(pv)+1,char);
754 (void)strcpy(newaddr,pv);
759 /* same thing but with a known length */
764 Perl's version of what C<strndup()> would be if it existed. Returns a
765 pointer to a newly allocated string which is a duplicate of the first
766 C<len> bytes from C<pv>. The memory allocated for the new string can be
767 freed with the C<Safefree()> function.
773 Perl_savepvn(pTHX_ const char *pv, register I32 len)
775 register char *newaddr;
777 New(903,newaddr,len+1,char);
778 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
780 Copy(pv,newaddr,len,char); /* might not be null terminated */
781 newaddr[len] = '\0'; /* is now */
784 Zero(newaddr,len+1,char);
790 =for apidoc savesharedpv
792 A version of C<savepv()> which allocates the duplicate string in memory
793 which is shared between threads.
798 Perl_savesharedpv(pTHX_ const char *pv)
800 register char *newaddr = Nullch;
802 newaddr = (char*)PerlMemShared_malloc(strlen(pv)+1);
803 (void)strcpy(newaddr,pv);
810 /* the SV for Perl_form() and mess() is not kept in an arena */
819 return sv_2mortal(newSVpvn("",0));
824 /* Create as PVMG now, to avoid any upgrading later */
826 Newz(905, any, 1, XPVMG);
827 SvFLAGS(sv) = SVt_PVMG;
828 SvANY(sv) = (void*)any;
829 SvREFCNT(sv) = 1 << 30; /* practically infinite */
834 #if defined(PERL_IMPLICIT_CONTEXT)
836 Perl_form_nocontext(const char* pat, ...)
842 retval = vform(pat, &args);
846 #endif /* PERL_IMPLICIT_CONTEXT */
849 =head1 Miscellaneous Functions
852 Takes a sprintf-style format pattern and conventional
853 (non-SV) arguments and returns the formatted string.
855 (char *) Perl_form(pTHX_ const char* pat, ...)
857 can be used any place a string (char *) is required:
859 char * s = Perl_form("%d.%d",major,minor);
861 Uses a single private buffer so if you want to format several strings you
862 must explicitly copy the earlier strings away (and free the copies when you
869 Perl_form(pTHX_ const char* pat, ...)
874 retval = vform(pat, &args);
880 Perl_vform(pTHX_ const char *pat, va_list *args)
882 SV *sv = mess_alloc();
883 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
887 #if defined(PERL_IMPLICIT_CONTEXT)
889 Perl_mess_nocontext(const char *pat, ...)
895 retval = vmess(pat, &args);
899 #endif /* PERL_IMPLICIT_CONTEXT */
902 Perl_mess(pTHX_ const char *pat, ...)
907 retval = vmess(pat, &args);
913 S_closest_cop(pTHX_ COP *cop, OP *o)
915 /* Look for PL_op starting from o. cop is the last COP we've seen. */
917 if (!o || o == PL_op) return cop;
919 if (o->op_flags & OPf_KIDS) {
921 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
925 /* If the OP_NEXTSTATE has been optimised away we can still use it
926 * the get the file and line number. */
928 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
931 /* Keep searching, and return when we've found something. */
933 new_cop = closest_cop(cop, kid);
934 if (new_cop) return new_cop;
944 Perl_vmess(pTHX_ const char *pat, va_list *args)
946 SV *sv = mess_alloc();
947 static char dgd[] = " during global destruction.\n";
950 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
951 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
954 * Try and find the file and line for PL_op. This will usually be
955 * PL_curcop, but it might be a cop that has been optimised away. We
956 * can try to find such a cop by searching through the optree starting
957 * from the sibling of PL_curcop.
960 cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
961 if (!cop) cop = PL_curcop;
964 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
965 OutCopFILE(cop), (IV)CopLINE(cop));
966 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
967 bool line_mode = (RsSIMPLE(PL_rs) &&
968 SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
969 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
970 PL_last_in_gv == PL_argvgv ?
971 "" : GvNAME(PL_last_in_gv),
972 line_mode ? "line" : "chunk",
973 (IV)IoLINES(GvIOp(PL_last_in_gv)));
975 sv_catpv(sv, PL_dirty ? dgd : ".\n");
981 Perl_write_to_stderr(pTHX_ const char* message, int msglen)
986 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
987 && (io = GvIO(PL_stderrgv))
988 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
995 SAVESPTR(PL_stderrgv);
996 PL_stderrgv = Nullgv;
998 PUSHSTACKi(PERLSI_MAGIC);
1002 PUSHs(SvTIED_obj((SV*)io, mg));
1003 PUSHs(sv_2mortal(newSVpvn(message, msglen)));
1005 call_method("PRINT", G_SCALAR);
1013 /* SFIO can really mess with your errno */
1016 PerlIO *serr = Perl_error_log;
1018 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1019 (void)PerlIO_flush(serr);
1027 Perl_vdie(pTHX_ const char* pat, va_list *args)
1030 int was_in_eval = PL_in_eval;
1037 DEBUG_S(PerlIO_printf(Perl_debug_log,
1038 "%p: die: curstack = %p, mainstack = %p\n",
1039 thr, PL_curstack, PL_mainstack));
1042 msv = vmess(pat, args);
1043 if (PL_errors && SvCUR(PL_errors)) {
1044 sv_catsv(PL_errors, msv);
1045 message = SvPV(PL_errors, msglen);
1046 SvCUR_set(PL_errors, 0);
1049 message = SvPV(msv,msglen);
1056 DEBUG_S(PerlIO_printf(Perl_debug_log,
1057 "%p: die: message = %s\ndiehook = %p\n",
1058 thr, message, PL_diehook));
1060 /* sv_2cv might call Perl_croak() */
1061 SV *olddiehook = PL_diehook;
1063 SAVESPTR(PL_diehook);
1064 PL_diehook = Nullsv;
1065 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1067 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1074 msg = newSVpvn(message, msglen);
1082 PUSHSTACKi(PERLSI_DIEHOOK);
1086 call_sv((SV*)cv, G_DISCARD);
1092 PL_restartop = die_where(message, msglen);
1093 DEBUG_S(PerlIO_printf(Perl_debug_log,
1094 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
1095 thr, PL_restartop, was_in_eval, PL_top_env));
1096 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
1098 return PL_restartop;
1101 #if defined(PERL_IMPLICIT_CONTEXT)
1103 Perl_die_nocontext(const char* pat, ...)
1108 va_start(args, pat);
1109 o = vdie(pat, &args);
1113 #endif /* PERL_IMPLICIT_CONTEXT */
1116 Perl_die(pTHX_ const char* pat, ...)
1120 va_start(args, pat);
1121 o = vdie(pat, &args);
1127 Perl_vcroak(pTHX_ const char* pat, va_list *args)
1137 msv = vmess(pat, args);
1138 if (PL_errors && SvCUR(PL_errors)) {
1139 sv_catsv(PL_errors, msv);
1140 message = SvPV(PL_errors, msglen);
1141 SvCUR_set(PL_errors, 0);
1144 message = SvPV(msv,msglen);
1151 DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s",
1152 PTR2UV(thr), message));
1155 /* sv_2cv might call Perl_croak() */
1156 SV *olddiehook = PL_diehook;
1158 SAVESPTR(PL_diehook);
1159 PL_diehook = Nullsv;
1160 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1162 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1169 msg = newSVpvn(message, msglen);
1177 PUSHSTACKi(PERLSI_DIEHOOK);
1181 call_sv((SV*)cv, G_DISCARD);
1187 PL_restartop = die_where(message, msglen);
1191 message = SvPVx(ERRSV, msglen);
1193 write_to_stderr(message, msglen);
1197 #if defined(PERL_IMPLICIT_CONTEXT)
1199 Perl_croak_nocontext(const char *pat, ...)
1203 va_start(args, pat);
1208 #endif /* PERL_IMPLICIT_CONTEXT */
1211 =head1 Warning and Dieing
1215 This is the XSUB-writer's interface to Perl's C<die> function.
1216 Normally use this function the same way you use the C C<printf>
1217 function. See C<warn>.
1219 If you want to throw an exception object, assign the object to
1220 C<$@> and then pass C<Nullch> to croak():
1222 errsv = get_sv("@", TRUE);
1223 sv_setsv(errsv, exception_object);
1230 Perl_croak(pTHX_ const char *pat, ...)
1233 va_start(args, pat);
1240 Perl_vwarn(pTHX_ const char* pat, va_list *args)
1249 msv = vmess(pat, args);
1250 message = SvPV(msv, msglen);
1253 /* sv_2cv might call Perl_warn() */
1254 SV *oldwarnhook = PL_warnhook;
1256 SAVESPTR(PL_warnhook);
1257 PL_warnhook = Nullsv;
1258 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1260 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1266 msg = newSVpvn(message, msglen);
1270 PUSHSTACKi(PERLSI_WARNHOOK);
1274 call_sv((SV*)cv, G_DISCARD);
1281 write_to_stderr(message, msglen);
1284 #if defined(PERL_IMPLICIT_CONTEXT)
1286 Perl_warn_nocontext(const char *pat, ...)
1290 va_start(args, pat);
1294 #endif /* PERL_IMPLICIT_CONTEXT */
1299 This is the XSUB-writer's interface to Perl's C<warn> function. Use this
1300 function the same way you use the C C<printf> function. See
1307 Perl_warn(pTHX_ const char *pat, ...)
1310 va_start(args, pat);
1315 #if defined(PERL_IMPLICIT_CONTEXT)
1317 Perl_warner_nocontext(U32 err, const char *pat, ...)
1321 va_start(args, pat);
1322 vwarner(err, pat, &args);
1325 #endif /* PERL_IMPLICIT_CONTEXT */
1328 Perl_warner(pTHX_ U32 err, const char* pat,...)
1331 va_start(args, pat);
1332 vwarner(err, pat, &args);
1337 Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1346 msv = vmess(pat, args);
1347 message = SvPV(msv, msglen);
1351 /* sv_2cv might call Perl_croak() */
1352 SV *olddiehook = PL_diehook;
1354 SAVESPTR(PL_diehook);
1355 PL_diehook = Nullsv;
1356 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1358 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1364 msg = newSVpvn(message, msglen);
1368 PUSHSTACKi(PERLSI_DIEHOOK);
1372 call_sv((SV*)cv, G_DISCARD);
1378 PL_restartop = die_where(message, msglen);
1381 write_to_stderr(message, msglen);
1386 /* sv_2cv might call Perl_warn() */
1387 SV *oldwarnhook = PL_warnhook;
1389 SAVESPTR(PL_warnhook);
1390 PL_warnhook = Nullsv;
1391 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1393 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1399 msg = newSVpvn(message, msglen);
1403 PUSHSTACKi(PERLSI_WARNHOOK);
1407 call_sv((SV*)cv, G_DISCARD);
1413 write_to_stderr(message, msglen);
1417 /* since we've already done strlen() for both nam and val
1418 * we can use that info to make things faster than
1419 * sprintf(s, "%s=%s", nam, val)
1421 #define my_setenv_format(s, nam, nlen, val, vlen) \
1422 Copy(nam, s, nlen, char); \
1424 Copy(val, s+(nlen+1), vlen, char); \
1425 *(s+(nlen+1+vlen)) = '\0'
1427 #ifdef USE_ENVIRON_ARRAY
1428 /* VMS' my_setenv() is in vms.c */
1429 #if !defined(WIN32) && !defined(NETWARE)
1431 Perl_my_setenv(pTHX_ char *nam, char *val)
1434 /* only parent thread can modify process environment */
1435 if (PL_curinterp == aTHX)
1438 #ifndef PERL_USE_SAFE_PUTENV
1439 /* most putenv()s leak, so we manipulate environ directly */
1440 register I32 i=setenv_getix(nam); /* where does it go? */
1443 if (environ == PL_origenviron) { /* need we copy environment? */
1449 for (max = i; environ[max]; max++) ;
1450 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1451 for (j=0; j<max; j++) { /* copy environment */
1452 int len = strlen(environ[j]);
1453 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1454 Copy(environ[j], tmpenv[j], len+1, char);
1456 tmpenv[max] = Nullch;
1457 environ = tmpenv; /* tell exec where it is now */
1460 safesysfree(environ[i]);
1461 while (environ[i]) {
1462 environ[i] = environ[i+1];
1467 if (!environ[i]) { /* does not exist yet */
1468 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1469 environ[i+1] = Nullch; /* make sure it's null terminated */
1472 safesysfree(environ[i]);
1476 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1477 /* all that work just for this */
1478 my_setenv_format(environ[i], nam, nlen, val, vlen);
1480 #else /* PERL_USE_SAFE_PUTENV */
1481 # if defined(__CYGWIN__) || defined( EPOC)
1482 setenv(nam, val, 1);
1485 int nlen = strlen(nam), vlen;
1490 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1491 /* all that work just for this */
1492 my_setenv_format(new_env, nam, nlen, val, vlen);
1493 (void)putenv(new_env);
1494 # endif /* __CYGWIN__ */
1495 #endif /* PERL_USE_SAFE_PUTENV */
1499 #else /* WIN32 || NETWARE */
1502 Perl_my_setenv(pTHX_ char *nam,char *val)
1504 register char *envstr;
1505 int nlen = strlen(nam), vlen;
1511 New(904, envstr, nlen+vlen+2, char);
1512 my_setenv_format(envstr, nam, nlen, val, vlen);
1513 (void)PerlEnv_putenv(envstr);
1517 #endif /* WIN32 || NETWARE */
1520 Perl_setenv_getix(pTHX_ char *nam)
1522 register I32 i, len = strlen(nam);
1524 for (i = 0; environ[i]; i++) {
1527 strnicmp(environ[i],nam,len) == 0
1529 strnEQ(environ[i],nam,len)
1531 && environ[i][len] == '=')
1532 break; /* strnEQ must come first to avoid */
1533 } /* potential SEGV's */
1537 #endif /* !VMS && !EPOC*/
1539 #ifdef UNLINK_ALL_VERSIONS
1541 Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
1545 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
1550 /* this is a drop-in replacement for bcopy() */
1551 #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
1553 Perl_my_bcopy(register const char *from,register char *to,register I32 len)
1557 if (from - to >= 0) {
1565 *(--to) = *(--from);
1571 /* this is a drop-in replacement for memset() */
1574 Perl_my_memset(register char *loc, register I32 ch, register I32 len)
1584 /* this is a drop-in replacement for bzero() */
1585 #if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
1587 Perl_my_bzero(register char *loc, register I32 len)
1597 /* this is a drop-in replacement for memcmp() */
1598 #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
1600 Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
1602 register U8 *a = (U8 *)s1;
1603 register U8 *b = (U8 *)s2;
1607 if (tmp = *a++ - *b++)
1612 #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
1616 #ifdef USE_CHAR_VSPRINTF
1621 vsprintf(char *dest, const char *pat, char *args)
1625 fakebuf._ptr = dest;
1626 fakebuf._cnt = 32767;
1630 fakebuf._flag = _IOWRT|_IOSTRG;
1631 _doprnt(pat, args, &fakebuf); /* what a kludge */
1632 (void)putc('\0', &fakebuf);
1633 #ifdef USE_CHAR_VSPRINTF
1636 return 0; /* perl doesn't use return value */
1640 #endif /* HAS_VPRINTF */
1643 #if BYTEORDER != 0x4321
1645 Perl_my_swap(pTHX_ short s)
1647 #if (BYTEORDER & 1) == 0
1650 result = ((s & 255) << 8) + ((s >> 8) & 255);
1658 Perl_my_htonl(pTHX_ long l)
1662 char c[sizeof(long)];
1665 #if BYTEORDER == 0x1234
1666 u.c[0] = (l >> 24) & 255;
1667 u.c[1] = (l >> 16) & 255;
1668 u.c[2] = (l >> 8) & 255;
1672 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1673 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1678 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1679 u.c[o & 0xf] = (l >> s) & 255;
1687 Perl_my_ntohl(pTHX_ long l)
1691 char c[sizeof(long)];
1694 #if BYTEORDER == 0x1234
1695 u.c[0] = (l >> 24) & 255;
1696 u.c[1] = (l >> 16) & 255;
1697 u.c[2] = (l >> 8) & 255;
1701 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1702 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1709 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1710 l |= (u.c[o & 0xf] & 255) << s;
1717 #endif /* BYTEORDER != 0x4321 */
1721 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1722 * If these functions are defined,
1723 * the BYTEORDER is neither 0x1234 nor 0x4321.
1724 * However, this is not assumed.
1728 #define HTOV(name,type) \
1730 name (register type n) \
1734 char c[sizeof(type)]; \
1738 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1739 u.c[i] = (n >> s) & 0xFF; \
1744 #define VTOH(name,type) \
1746 name (register type n) \
1750 char c[sizeof(type)]; \
1756 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1757 n += (u.c[i] & 0xFF) << s; \
1762 #if defined(HAS_HTOVS) && !defined(htovs)
1765 #if defined(HAS_HTOVL) && !defined(htovl)
1768 #if defined(HAS_VTOHS) && !defined(vtohs)
1771 #if defined(HAS_VTOHL) && !defined(vtohl)
1776 Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
1778 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
1780 register I32 This, that;
1786 PERL_FLUSHALL_FOR_CHILD;
1787 This = (*mode == 'w');
1791 taint_proper("Insecure %s%s", "EXEC");
1793 if (PerlProc_pipe(p) < 0)
1795 /* Try for another pipe pair for error return */
1796 if (PerlProc_pipe(pp) >= 0)
1798 while ((pid = PerlProc_fork()) < 0) {
1799 if (errno != EAGAIN) {
1800 PerlLIO_close(p[This]);
1801 PerlLIO_close(p[that]);
1803 PerlLIO_close(pp[0]);
1804 PerlLIO_close(pp[1]);
1816 /* Close parent's end of error status pipe (if any) */
1818 PerlLIO_close(pp[0]);
1819 #if defined(HAS_FCNTL) && defined(F_SETFD)
1820 /* Close error pipe automatically if exec works */
1821 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1824 /* Now dup our end of _the_ pipe to right position */
1825 if (p[THIS] != (*mode == 'r')) {
1826 PerlLIO_dup2(p[THIS], *mode == 'r');
1827 PerlLIO_close(p[THIS]);
1828 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
1829 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1832 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1833 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
1834 /* No automatic close - do it by hand */
1841 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
1847 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
1853 do_execfree(); /* free any memory malloced by child on fork */
1855 PerlLIO_close(pp[1]);
1856 /* Keep the lower of the two fd numbers */
1857 if (p[that] < p[This]) {
1858 PerlLIO_dup2(p[This], p[that]);
1859 PerlLIO_close(p[This]);
1863 PerlLIO_close(p[that]); /* close child's end of pipe */
1866 sv = *av_fetch(PL_fdpid,p[This],TRUE);
1868 (void)SvUPGRADE(sv,SVt_IV);
1870 PL_forkprocess = pid;
1871 /* If we managed to get status pipe check for exec fail */
1872 if (did_pipes && pid > 0) {
1876 while (n < sizeof(int)) {
1877 n1 = PerlLIO_read(pp[0],
1878 (void*)(((char*)&errkid)+n),
1884 PerlLIO_close(pp[0]);
1886 if (n) { /* Error */
1888 PerlLIO_close(p[This]);
1889 if (n != sizeof(int))
1890 Perl_croak(aTHX_ "panic: kid popen errno read");
1892 pid2 = wait4pid(pid, &status, 0);
1893 } while (pid2 == -1 && errno == EINTR);
1894 errno = errkid; /* Propagate errno from kid */
1899 PerlLIO_close(pp[0]);
1900 return PerlIO_fdopen(p[This], mode);
1902 Perl_croak(aTHX_ "List form of piped open not implemented");
1903 return (PerlIO *) NULL;
1907 /* VMS' my_popen() is in VMS.c, same with OS/2. */
1908 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
1910 Perl_my_popen(pTHX_ char *cmd, char *mode)
1913 register I32 This, that;
1916 I32 doexec = strNE(cmd,"-");
1920 PERL_FLUSHALL_FOR_CHILD;
1923 return my_syspopen(aTHX_ cmd,mode);
1926 This = (*mode == 'w');
1928 if (doexec && PL_tainting) {
1930 taint_proper("Insecure %s%s", "EXEC");
1932 if (PerlProc_pipe(p) < 0)
1934 if (doexec && PerlProc_pipe(pp) >= 0)
1936 while ((pid = PerlProc_fork()) < 0) {
1937 if (errno != EAGAIN) {
1938 PerlLIO_close(p[This]);
1939 PerlLIO_close(p[that]);
1941 PerlLIO_close(pp[0]);
1942 PerlLIO_close(pp[1]);
1945 Perl_croak(aTHX_ "Can't fork");
1958 PerlLIO_close(pp[0]);
1959 #if defined(HAS_FCNTL) && defined(F_SETFD)
1960 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1963 if (p[THIS] != (*mode == 'r')) {
1964 PerlLIO_dup2(p[THIS], *mode == 'r');
1965 PerlLIO_close(p[THIS]);
1966 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
1967 PerlLIO_close(p[THAT]);
1970 PerlLIO_close(p[THAT]);
1973 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
1982 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
1987 /* may or may not use the shell */
1988 do_exec3(cmd, pp[1], did_pipes);
1991 #endif /* defined OS2 */
1993 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
1994 SvREADONLY_off(GvSV(tmpgv));
1995 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
1996 SvREADONLY_on(GvSV(tmpgv));
1998 #ifdef THREADS_HAVE_PIDS
1999 PL_ppid = (IV)getppid();
2002 hv_clear(PL_pidstatus); /* we have no children */
2007 do_execfree(); /* free any memory malloced by child on vfork */
2009 PerlLIO_close(pp[1]);
2010 if (p[that] < p[This]) {
2011 PerlLIO_dup2(p[This], p[that]);
2012 PerlLIO_close(p[This]);
2016 PerlLIO_close(p[that]);
2019 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2021 (void)SvUPGRADE(sv,SVt_IV);
2023 PL_forkprocess = pid;
2024 if (did_pipes && pid > 0) {
2028 while (n < sizeof(int)) {
2029 n1 = PerlLIO_read(pp[0],
2030 (void*)(((char*)&errkid)+n),
2036 PerlLIO_close(pp[0]);
2038 if (n) { /* Error */
2040 PerlLIO_close(p[This]);
2041 if (n != sizeof(int))
2042 Perl_croak(aTHX_ "panic: kid popen errno read");
2044 pid2 = wait4pid(pid, &status, 0);
2045 } while (pid2 == -1 && errno == EINTR);
2046 errno = errkid; /* Propagate errno from kid */
2051 PerlLIO_close(pp[0]);
2052 return PerlIO_fdopen(p[This], mode);
2055 #if defined(atarist) || defined(EPOC)
2058 Perl_my_popen(pTHX_ char *cmd, char *mode)
2060 PERL_FLUSHALL_FOR_CHILD;
2061 /* Call system's popen() to get a FILE *, then import it.
2062 used 0 for 2nd parameter to PerlIO_importFILE;
2065 return PerlIO_importFILE(popen(cmd, mode), 0);
2069 FILE *djgpp_popen();
2071 Perl_my_popen(pTHX_ char *cmd, char *mode)
2073 PERL_FLUSHALL_FOR_CHILD;
2074 /* Call system's popen() to get a FILE *, then import it.
2075 used 0 for 2nd parameter to PerlIO_importFILE;
2078 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2083 #endif /* !DOSISH */
2085 /* this is called in parent before the fork() */
2087 Perl_atfork_lock(void)
2089 #if defined(USE_ITHREADS)
2090 /* locks must be held in locking order (if any) */
2092 MUTEX_LOCK(&PL_malloc_mutex);
2098 /* this is called in both parent and child after the fork() */
2100 Perl_atfork_unlock(void)
2102 #if defined(USE_ITHREADS)
2103 /* locks must be released in same order as in atfork_lock() */
2105 MUTEX_UNLOCK(&PL_malloc_mutex);
2114 #if defined(HAS_FORK)
2116 #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
2121 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2122 * handlers elsewhere in the code */
2127 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2128 Perl_croak_nocontext("fork() not available");
2130 #endif /* HAS_FORK */
2135 Perl_dump_fds(pTHX_ char *s)
2140 PerlIO_printf(Perl_debug_log,"%s", s);
2141 for (fd = 0; fd < 32; fd++) {
2142 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
2143 PerlIO_printf(Perl_debug_log," %d",fd);
2145 PerlIO_printf(Perl_debug_log,"\n");
2147 #endif /* DUMP_FDS */
2151 dup2(int oldfd, int newfd)
2153 #if defined(HAS_FCNTL) && defined(F_DUPFD)
2156 PerlLIO_close(newfd);
2157 return fcntl(oldfd, F_DUPFD, newfd);
2159 #define DUP2_MAX_FDS 256
2160 int fdtmp[DUP2_MAX_FDS];
2166 PerlLIO_close(newfd);
2167 /* good enough for low fd's... */
2168 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
2169 if (fdx >= DUP2_MAX_FDS) {
2177 PerlLIO_close(fdtmp[--fdx]);
2184 #ifdef HAS_SIGACTION
2186 #ifdef MACOS_TRADITIONAL
2187 /* We don't want restart behavior on MacOS */
2192 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2194 struct sigaction act, oact;
2197 /* only "parent" interpreter can diddle signals */
2198 if (PL_curinterp != aTHX)
2202 act.sa_handler = handler;
2203 sigemptyset(&act.sa_mask);
2206 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2207 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2209 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2210 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2211 act.sa_flags |= SA_NOCLDWAIT;
2213 if (sigaction(signo, &act, &oact) == -1)
2216 return oact.sa_handler;
2220 Perl_rsignal_state(pTHX_ int signo)
2222 struct sigaction oact;
2224 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2227 return oact.sa_handler;
2231 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2233 struct sigaction act;
2236 /* only "parent" interpreter can diddle signals */
2237 if (PL_curinterp != aTHX)
2241 act.sa_handler = handler;
2242 sigemptyset(&act.sa_mask);
2245 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2246 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2248 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2249 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2250 act.sa_flags |= SA_NOCLDWAIT;
2252 return sigaction(signo, &act, save);
2256 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2259 /* only "parent" interpreter can diddle signals */
2260 if (PL_curinterp != aTHX)
2264 return sigaction(signo, save, (struct sigaction *)NULL);
2267 #else /* !HAS_SIGACTION */
2270 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2272 #if defined(USE_ITHREADS) && !defined(WIN32)
2273 /* only "parent" interpreter can diddle signals */
2274 if (PL_curinterp != aTHX)
2278 return PerlProc_signal(signo, handler);
2281 static int sig_trapped; /* XXX signals are process-wide anyway, so we
2282 ignore the implications of this for threading */
2292 Perl_rsignal_state(pTHX_ int signo)
2294 Sighandler_t oldsig;
2296 #if defined(USE_ITHREADS) && !defined(WIN32)
2297 /* only "parent" interpreter can diddle signals */
2298 if (PL_curinterp != aTHX)
2303 oldsig = PerlProc_signal(signo, sig_trap);
2304 PerlProc_signal(signo, oldsig);
2306 PerlProc_kill(PerlProc_getpid(), signo);
2311 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2313 #if defined(USE_ITHREADS) && !defined(WIN32)
2314 /* only "parent" interpreter can diddle signals */
2315 if (PL_curinterp != aTHX)
2318 *save = PerlProc_signal(signo, handler);
2319 return (*save == SIG_ERR) ? -1 : 0;
2323 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2325 #if defined(USE_ITHREADS) && !defined(WIN32)
2326 /* only "parent" interpreter can diddle signals */
2327 if (PL_curinterp != aTHX)
2330 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
2333 #endif /* !HAS_SIGACTION */
2334 #endif /* !PERL_MICRO */
2336 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
2337 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
2339 Perl_my_pclose(pTHX_ PerlIO *ptr)
2341 Sigsave_t hstat, istat, qstat;
2347 int saved_errno = 0;
2349 int saved_vaxc_errno;
2352 int saved_win32_errno;
2356 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
2358 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
2360 *svp = &PL_sv_undef;
2362 if (pid == -1) { /* Opened by popen. */
2363 return my_syspclose(ptr);
2366 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2367 saved_errno = errno;
2369 saved_vaxc_errno = vaxc$errno;
2372 saved_win32_errno = GetLastError();
2376 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
2379 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2380 rsignal_save(SIGINT, SIG_IGN, &istat);
2381 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
2384 pid2 = wait4pid(pid, &status, 0);
2385 } while (pid2 == -1 && errno == EINTR);
2387 rsignal_restore(SIGHUP, &hstat);
2388 rsignal_restore(SIGINT, &istat);
2389 rsignal_restore(SIGQUIT, &qstat);
2392 SETERRNO(saved_errno, saved_vaxc_errno);
2395 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
2397 #endif /* !DOSISH */
2399 #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
2401 Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
2406 #if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2410 char spid[TYPE_CHARS(int)];
2413 sprintf(spid, "%"IVdf, (IV)pid);
2414 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2415 if (svp && *svp != &PL_sv_undef) {
2416 *statusp = SvIVX(*svp);
2417 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2424 hv_iterinit(PL_pidstatus);
2425 if ((entry = hv_iternext(PL_pidstatus))) {
2427 char spid[TYPE_CHARS(int)];
2429 pid = atoi(hv_iterkey(entry,(I32*)statusp));
2430 sv = hv_iterval(PL_pidstatus,entry);
2431 *statusp = SvIVX(sv);
2432 sprintf(spid, "%"IVdf, (IV)pid);
2433 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2440 # ifdef HAS_WAITPID_RUNTIME
2441 if (!HAS_WAITPID_RUNTIME)
2444 result = PerlProc_waitpid(pid,statusp,flags);
2447 #if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
2448 result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
2451 #if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2455 Perl_croak(aTHX_ "Can't do waitpid with flags");
2457 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
2458 pidgone(result,*statusp);
2465 if (result < 0 && errno == EINTR) {
2470 #endif /* !DOSISH || OS2 || WIN32 || NETWARE */
2474 Perl_pidgone(pTHX_ Pid_t pid, int status)
2477 char spid[TYPE_CHARS(int)];
2479 sprintf(spid, "%"IVdf, (IV)pid);
2480 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
2481 (void)SvUPGRADE(sv,SVt_IV);
2486 #if defined(atarist) || defined(OS2) || defined(EPOC)
2489 int /* Cannot prototype with I32
2491 my_syspclose(PerlIO *ptr)
2494 Perl_my_pclose(pTHX_ PerlIO *ptr)
2497 /* Needs work for PerlIO ! */
2498 FILE *f = PerlIO_findFILE(ptr);
2499 I32 result = pclose(f);
2500 PerlIO_releaseFILE(ptr,f);
2508 Perl_my_pclose(pTHX_ PerlIO *ptr)
2510 /* Needs work for PerlIO ! */
2511 FILE *f = PerlIO_findFILE(ptr);
2512 I32 result = djgpp_pclose(f);
2513 result = (result << 8) & 0xff00;
2514 PerlIO_releaseFILE(ptr,f);
2520 Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
2523 register const char *frombase = from;
2526 register const char c = *from;
2531 while (count-- > 0) {
2532 for (todo = len; todo > 0; todo--) {
2541 Perl_same_dirent(pTHX_ char *a, char *b)
2543 char *fa = strrchr(a,'/');
2544 char *fb = strrchr(b,'/');
2547 SV *tmpsv = sv_newmortal();
2560 sv_setpv(tmpsv, ".");
2562 sv_setpvn(tmpsv, a, fa - a);
2563 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
2566 sv_setpv(tmpsv, ".");
2568 sv_setpvn(tmpsv, b, fb - b);
2569 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
2571 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2572 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2574 #endif /* !HAS_RENAME */
2577 Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
2579 char *xfound = Nullch;
2580 char *xfailed = Nullch;
2581 char tmpbuf[MAXPATHLEN];
2585 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2586 # define SEARCH_EXTS ".bat", ".cmd", NULL
2587 # define MAX_EXT_LEN 4
2590 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2591 # define MAX_EXT_LEN 4
2594 # define SEARCH_EXTS ".pl", ".com", NULL
2595 # define MAX_EXT_LEN 4
2597 /* additional extensions to try in each dir if scriptname not found */
2599 char *exts[] = { SEARCH_EXTS };
2600 char **ext = search_ext ? search_ext : exts;
2601 int extidx = 0, i = 0;
2602 char *curext = Nullch;
2604 # define MAX_EXT_LEN 0
2608 * If dosearch is true and if scriptname does not contain path
2609 * delimiters, search the PATH for scriptname.
2611 * If SEARCH_EXTS is also defined, will look for each
2612 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2613 * while searching the PATH.
2615 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2616 * proceeds as follows:
2617 * If DOSISH or VMSISH:
2618 * + look for ./scriptname{,.foo,.bar}
2619 * + search the PATH for scriptname{,.foo,.bar}
2622 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2623 * this will not look in '.' if it's not in the PATH)
2628 # ifdef ALWAYS_DEFTYPES
2629 len = strlen(scriptname);
2630 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2631 int hasdir, idx = 0, deftypes = 1;
2634 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2637 int hasdir, idx = 0, deftypes = 1;
2640 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2642 /* The first time through, just add SEARCH_EXTS to whatever we
2643 * already have, so we can check for default file types. */
2645 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
2651 if ((strlen(tmpbuf) + strlen(scriptname)
2652 + MAX_EXT_LEN) >= sizeof tmpbuf)
2653 continue; /* don't search dir with too-long name */
2654 strcat(tmpbuf, scriptname);
2658 if (strEQ(scriptname, "-"))
2660 if (dosearch) { /* Look in '.' first. */
2661 char *cur = scriptname;
2663 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2665 if (strEQ(ext[i++],curext)) {
2666 extidx = -1; /* already has an ext */
2671 DEBUG_p(PerlIO_printf(Perl_debug_log,
2672 "Looking for %s\n",cur));
2673 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2674 && !S_ISDIR(PL_statbuf.st_mode)) {
2682 if (cur == scriptname) {
2683 len = strlen(scriptname);
2684 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
2686 cur = strcpy(tmpbuf, scriptname);
2688 } while (extidx >= 0 && ext[extidx] /* try an extension? */
2689 && strcpy(tmpbuf+len, ext[extidx++]));
2694 #ifdef MACOS_TRADITIONAL
2695 if (dosearch && !strchr(scriptname, ':') &&
2696 (s = PerlEnv_getenv("Commands")))
2698 if (dosearch && !strchr(scriptname, '/')
2700 && !strchr(scriptname, '\\')
2702 && (s = PerlEnv_getenv("PATH")))
2707 PL_bufend = s + strlen(s);
2708 while (s < PL_bufend) {
2709 #ifdef MACOS_TRADITIONAL
2710 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2714 #if defined(atarist) || defined(DOSISH)
2719 && *s != ';'; len++, s++) {
2720 if (len < sizeof tmpbuf)
2723 if (len < sizeof tmpbuf)
2725 #else /* ! (atarist || DOSISH) */
2726 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2729 #endif /* ! (atarist || DOSISH) */
2730 #endif /* MACOS_TRADITIONAL */
2733 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
2734 continue; /* don't search dir with too-long name */
2735 #ifdef MACOS_TRADITIONAL
2736 if (len && tmpbuf[len - 1] != ':')
2737 tmpbuf[len++] = ':';
2740 #if defined(atarist) || defined(__MINT__) || defined(DOSISH)
2741 && tmpbuf[len - 1] != '/'
2742 && tmpbuf[len - 1] != '\\'
2745 tmpbuf[len++] = '/';
2746 if (len == 2 && tmpbuf[0] == '.')
2749 (void)strcpy(tmpbuf + len, scriptname);
2753 len = strlen(tmpbuf);
2754 if (extidx > 0) /* reset after previous loop */
2758 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
2759 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
2760 if (S_ISDIR(PL_statbuf.st_mode)) {
2764 } while ( retval < 0 /* not there */
2765 && extidx>=0 && ext[extidx] /* try an extension? */
2766 && strcpy(tmpbuf+len, ext[extidx++])
2771 if (S_ISREG(PL_statbuf.st_mode)
2772 && cando(S_IRUSR,TRUE,&PL_statbuf)
2773 #if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
2774 && cando(S_IXUSR,TRUE,&PL_statbuf)
2778 xfound = tmpbuf; /* bingo! */
2782 xfailed = savepv(tmpbuf);
2785 if (!xfound && !seen_dot && !xfailed &&
2786 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
2787 || S_ISDIR(PL_statbuf.st_mode)))
2789 seen_dot = 1; /* Disable message. */
2791 if (flags & 1) { /* do or die? */
2792 Perl_croak(aTHX_ "Can't %s %s%s%s",
2793 (xfailed ? "execute" : "find"),
2794 (xfailed ? xfailed : scriptname),
2795 (xfailed ? "" : " on PATH"),
2796 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2798 scriptname = Nullch;
2802 scriptname = xfound;
2804 return (scriptname ? savepv(scriptname) : Nullch);
2807 #ifndef PERL_GET_CONTEXT_DEFINED
2810 Perl_get_context(void)
2812 #if defined(USE_ITHREADS)
2813 # ifdef OLD_PTHREADS_API
2815 if (pthread_getspecific(PL_thr_key, &t))
2816 Perl_croak_nocontext("panic: pthread_getspecific");
2819 # ifdef I_MACH_CTHREADS
2820 return (void*)cthread_data(cthread_self());
2822 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
2831 Perl_set_context(void *t)
2833 #if defined(USE_ITHREADS)
2834 # ifdef I_MACH_CTHREADS
2835 cthread_set_data(cthread_self(), t);
2837 if (pthread_setspecific(PL_thr_key, t))
2838 Perl_croak_nocontext("panic: pthread_setspecific");
2843 #endif /* !PERL_GET_CONTEXT_DEFINED */
2845 #ifdef PERL_GLOBAL_STRUCT
2854 Perl_get_op_names(pTHX)
2860 Perl_get_op_descs(pTHX)
2866 Perl_get_no_modify(pTHX)
2868 return (char*)PL_no_modify;
2872 Perl_get_opargs(pTHX)
2878 Perl_get_ppaddr(pTHX)
2880 return (PPADDR_t*)PL_ppaddr;
2883 #ifndef HAS_GETENV_LEN
2885 Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
2887 char *env_trans = PerlEnv_getenv(env_elem);
2889 *len = strlen(env_trans);
2896 Perl_get_vtbl(pTHX_ int vtbl_id)
2898 MGVTBL* result = Null(MGVTBL*);
2902 result = &PL_vtbl_sv;
2905 result = &PL_vtbl_env;
2907 case want_vtbl_envelem:
2908 result = &PL_vtbl_envelem;
2911 result = &PL_vtbl_sig;
2913 case want_vtbl_sigelem:
2914 result = &PL_vtbl_sigelem;
2916 case want_vtbl_pack:
2917 result = &PL_vtbl_pack;
2919 case want_vtbl_packelem:
2920 result = &PL_vtbl_packelem;
2922 case want_vtbl_dbline:
2923 result = &PL_vtbl_dbline;
2926 result = &PL_vtbl_isa;
2928 case want_vtbl_isaelem:
2929 result = &PL_vtbl_isaelem;
2931 case want_vtbl_arylen:
2932 result = &PL_vtbl_arylen;
2934 case want_vtbl_glob:
2935 result = &PL_vtbl_glob;
2937 case want_vtbl_mglob:
2938 result = &PL_vtbl_mglob;
2940 case want_vtbl_nkeys:
2941 result = &PL_vtbl_nkeys;
2943 case want_vtbl_taint:
2944 result = &PL_vtbl_taint;
2946 case want_vtbl_substr:
2947 result = &PL_vtbl_substr;
2950 result = &PL_vtbl_vec;
2953 result = &PL_vtbl_pos;
2956 result = &PL_vtbl_bm;
2959 result = &PL_vtbl_fm;
2961 case want_vtbl_uvar:
2962 result = &PL_vtbl_uvar;
2964 case want_vtbl_defelem:
2965 result = &PL_vtbl_defelem;
2967 case want_vtbl_regexp:
2968 result = &PL_vtbl_regexp;
2970 case want_vtbl_regdata:
2971 result = &PL_vtbl_regdata;
2973 case want_vtbl_regdatum:
2974 result = &PL_vtbl_regdatum;
2976 #ifdef USE_LOCALE_COLLATE
2977 case want_vtbl_collxfrm:
2978 result = &PL_vtbl_collxfrm;
2981 case want_vtbl_amagic:
2982 result = &PL_vtbl_amagic;
2984 case want_vtbl_amagicelem:
2985 result = &PL_vtbl_amagicelem;
2987 case want_vtbl_backref:
2988 result = &PL_vtbl_backref;
2990 case want_vtbl_utf8:
2991 result = &PL_vtbl_utf8;
2998 Perl_my_fflush_all(pTHX)
3000 #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
3001 return PerlIO_flush(NULL);
3003 # if defined(HAS__FWALK)
3004 extern int fflush(FILE *);
3005 /* undocumented, unprototyped, but very useful BSDism */
3006 extern void _fwalk(int (*)(FILE *));
3010 # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
3012 # ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3013 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3015 # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3016 open_max = sysconf(_SC_OPEN_MAX);
3019 open_max = FOPEN_MAX;
3022 open_max = OPEN_MAX;
3033 for (i = 0; i < open_max; i++)
3034 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3035 STDIO_STREAM_ARRAY[i]._file < open_max &&
3036 STDIO_STREAM_ARRAY[i]._flag)
3037 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
3041 SETERRNO(EBADF,RMS_IFI);
3048 Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op)
3051 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3052 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3054 char *pars = OP_IS_FILETEST(op) ? "" : "()";
3055 char *type = OP_IS_SOCKET(op)
3056 || (gv && io && IoTYPE(io) == IoTYPE_SOCKET)
3057 ? "socket" : "filehandle";
3060 if (gv && isGV(gv)) {
3064 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3065 if (ckWARN(WARN_IO)) {
3066 const char *direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out";
3068 Perl_warner(aTHX_ packWARN(WARN_IO),
3069 "Filehandle %s opened only for %sput",
3072 Perl_warner(aTHX_ packWARN(WARN_IO),
3073 "Filehandle opened only for %sput", direction);
3080 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3082 warn_type = WARN_CLOSED;
3086 warn_type = WARN_UNOPENED;
3089 if (ckWARN(warn_type)) {
3090 if (name && *name) {
3091 Perl_warner(aTHX_ packWARN(warn_type),
3092 "%s%s on %s %s %s", func, pars, vile, type, name);
3093 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3095 aTHX_ packWARN(warn_type),
3096 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3101 Perl_warner(aTHX_ packWARN(warn_type),
3102 "%s%s on %s %s", func, pars, vile, type);
3103 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3105 aTHX_ packWARN(warn_type),
3106 "\t(Are you trying to call %s%s on dirhandle?)\n",
3115 /* in ASCII order, not that it matters */
3116 static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3119 Perl_ebcdic_control(pTHX_ int ch)
3127 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3128 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3131 if (ctlp == controllablechars)
3132 return('\177'); /* DEL */
3134 return((unsigned char)(ctlp - controllablechars - 1));
3135 } else { /* Want uncontrol */
3136 if (ch == '\177' || ch == -1)
3138 else if (ch == '\157')
3140 else if (ch == '\174')
3142 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3144 else if (ch == '\155')
3146 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3147 return(controllablechars[ch+1]);
3149 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3154 /* To workaround core dumps from the uninitialised tm_zone we get the
3155 * system to give us a reasonable struct to copy. This fix means that
3156 * strftime uses the tm_zone and tm_gmtoff values returned by
3157 * localtime(time()). That should give the desired result most of the
3158 * time. But probably not always!
3160 * This does not address tzname aspects of NETaa14816.
3165 # ifndef STRUCT_TM_HASZONE
3166 # define STRUCT_TM_HASZONE
3170 #ifdef STRUCT_TM_HASZONE /* Backward compat */
3171 # ifndef HAS_TM_TM_ZONE
3172 # define HAS_TM_TM_ZONE
3177 Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
3179 #ifdef HAS_TM_TM_ZONE
3182 Copy(localtime(&now), ptm, 1, struct tm);
3187 * mini_mktime - normalise struct tm values without the localtime()
3188 * semantics (and overhead) of mktime().
3191 Perl_mini_mktime(pTHX_ struct tm *ptm)
3195 int month, mday, year, jday;
3196 int odd_cent, odd_year;
3198 #define DAYS_PER_YEAR 365
3199 #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3200 #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3201 #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3202 #define SECS_PER_HOUR (60*60)
3203 #define SECS_PER_DAY (24*SECS_PER_HOUR)
3204 /* parentheses deliberately absent on these two, otherwise they don't work */
3205 #define MONTH_TO_DAYS 153/5
3206 #define DAYS_TO_MONTH 5/153
3207 /* offset to bias by March (month 4) 1st between month/mday & year finding */
3208 #define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3209 /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3210 #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3213 * Year/day algorithm notes:
3215 * With a suitable offset for numeric value of the month, one can find
3216 * an offset into the year by considering months to have 30.6 (153/5) days,
3217 * using integer arithmetic (i.e., with truncation). To avoid too much
3218 * messing about with leap days, we consider January and February to be
3219 * the 13th and 14th month of the previous year. After that transformation,
3220 * we need the month index we use to be high by 1 from 'normal human' usage,
3221 * so the month index values we use run from 4 through 15.
3223 * Given that, and the rules for the Gregorian calendar (leap years are those
3224 * divisible by 4 unless also divisible by 100, when they must be divisible
3225 * by 400 instead), we can simply calculate the number of days since some
3226 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3227 * the days we derive from our month index, and adding in the day of the
3228 * month. The value used here is not adjusted for the actual origin which
3229 * it normally would use (1 January A.D. 1), since we're not exposing it.
3230 * We're only building the value so we can turn around and get the
3231 * normalised values for the year, month, day-of-month, and day-of-year.
3233 * For going backward, we need to bias the value we're using so that we find
3234 * the right year value. (Basically, we don't want the contribution of
3235 * March 1st to the number to apply while deriving the year). Having done
3236 * that, we 'count up' the contribution to the year number by accounting for
3237 * full quadracenturies (400-year periods) with their extra leap days, plus
3238 * the contribution from full centuries (to avoid counting in the lost leap
3239 * days), plus the contribution from full quad-years (to count in the normal
3240 * leap days), plus the leftover contribution from any non-leap years.
3241 * At this point, if we were working with an actual leap day, we'll have 0
3242 * days left over. This is also true for March 1st, however. So, we have
3243 * to special-case that result, and (earlier) keep track of the 'odd'
3244 * century and year contributions. If we got 4 extra centuries in a qcent,
3245 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3246 * Otherwise, we add back in the earlier bias we removed (the 123 from
3247 * figuring in March 1st), find the month index (integer division by 30.6),
3248 * and the remainder is the day-of-month. We then have to convert back to
3249 * 'real' months (including fixing January and February from being 14/15 in
3250 * the previous year to being in the proper year). After that, to get
3251 * tm_yday, we work with the normalised year and get a new yearday value for
3252 * January 1st, which we subtract from the yearday value we had earlier,
3253 * representing the date we've re-built. This is done from January 1
3254 * because tm_yday is 0-origin.
3256 * Since POSIX time routines are only guaranteed to work for times since the
3257 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3258 * applies Gregorian calendar rules even to dates before the 16th century
3259 * doesn't bother me. Besides, you'd need cultural context for a given
3260 * date to know whether it was Julian or Gregorian calendar, and that's
3261 * outside the scope for this routine. Since we convert back based on the
3262 * same rules we used to build the yearday, you'll only get strange results
3263 * for input which needed normalising, or for the 'odd' century years which
3264 * were leap years in the Julian calander but not in the Gregorian one.
3265 * I can live with that.
3267 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3268 * that's still outside the scope for POSIX time manipulation, so I don't
3272 year = 1900 + ptm->tm_year;
3273 month = ptm->tm_mon;
3274 mday = ptm->tm_mday;
3275 /* allow given yday with no month & mday to dominate the result */
3276 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3279 jday = 1 + ptm->tm_yday;
3288 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3289 yearday += month*MONTH_TO_DAYS + mday + jday;
3291 * Note that we don't know when leap-seconds were or will be,
3292 * so we have to trust the user if we get something which looks
3293 * like a sensible leap-second. Wild values for seconds will
3294 * be rationalised, however.
3296 if ((unsigned) ptm->tm_sec <= 60) {
3303 secs += 60 * ptm->tm_min;
3304 secs += SECS_PER_HOUR * ptm->tm_hour;
3306 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3307 /* got negative remainder, but need positive time */
3308 /* back off an extra day to compensate */
3309 yearday += (secs/SECS_PER_DAY)-1;
3310 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3313 yearday += (secs/SECS_PER_DAY);
3314 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3317 else if (secs >= SECS_PER_DAY) {
3318 yearday += (secs/SECS_PER_DAY);
3319 secs %= SECS_PER_DAY;
3321 ptm->tm_hour = secs/SECS_PER_HOUR;
3322 secs %= SECS_PER_HOUR;
3323 ptm->tm_min = secs/60;
3325 ptm->tm_sec += secs;
3326 /* done with time of day effects */
3328 * The algorithm for yearday has (so far) left it high by 428.
3329 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3330 * bias it by 123 while trying to figure out what year it
3331 * really represents. Even with this tweak, the reverse
3332 * translation fails for years before A.D. 0001.
3333 * It would still fail for Feb 29, but we catch that one below.
3335 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3336 yearday -= YEAR_ADJUST;
3337 year = (yearday / DAYS_PER_QCENT) * 400;
3338 yearday %= DAYS_PER_QCENT;
3339 odd_cent = yearday / DAYS_PER_CENT;
3340 year += odd_cent * 100;
3341 yearday %= DAYS_PER_CENT;
3342 year += (yearday / DAYS_PER_QYEAR) * 4;
3343 yearday %= DAYS_PER_QYEAR;
3344 odd_year = yearday / DAYS_PER_YEAR;
3346 yearday %= DAYS_PER_YEAR;
3347 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3352 yearday += YEAR_ADJUST; /* recover March 1st crock */
3353 month = yearday*DAYS_TO_MONTH;
3354 yearday -= month*MONTH_TO_DAYS;
3355 /* recover other leap-year adjustment */
3364 ptm->tm_year = year - 1900;
3366 ptm->tm_mday = yearday;
3367 ptm->tm_mon = month;
3371 ptm->tm_mon = month - 1;
3373 /* re-build yearday based on Jan 1 to get tm_yday */
3375 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3376 yearday += 14*MONTH_TO_DAYS + 1;
3377 ptm->tm_yday = jday - yearday;
3378 /* fix tm_wday if not overridden by caller */
3379 if ((unsigned)ptm->tm_wday > 6)
3380 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3384 Perl_my_strftime(pTHX_ char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
3392 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3395 mytm.tm_hour = hour;
3396 mytm.tm_mday = mday;
3398 mytm.tm_year = year;
3399 mytm.tm_wday = wday;
3400 mytm.tm_yday = yday;
3401 mytm.tm_isdst = isdst;
3403 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3404 #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3409 #ifdef HAS_TM_TM_GMTOFF
3410 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3412 #ifdef HAS_TM_TM_ZONE
3413 mytm.tm_zone = mytm2.tm_zone;
3418 New(0, buf, buflen, char);
3419 len = strftime(buf, buflen, fmt, &mytm);
3421 ** The following is needed to handle to the situation where
3422 ** tmpbuf overflows. Basically we want to allocate a buffer
3423 ** and try repeatedly. The reason why it is so complicated
3424 ** is that getting a return value of 0 from strftime can indicate
3425 ** one of the following:
3426 ** 1. buffer overflowed,
3427 ** 2. illegal conversion specifier, or
3428 ** 3. the format string specifies nothing to be returned(not
3429 ** an error). This could be because format is an empty string
3430 ** or it specifies %p that yields an empty string in some locale.
3431 ** If there is a better way to make it portable, go ahead by
3434 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3437 /* Possibly buf overflowed - try again with a bigger buf */
3438 int fmtlen = strlen(fmt);
3439 int bufsize = fmtlen + buflen;
3441 New(0, buf, bufsize, char);
3443 buflen = strftime(buf, bufsize, fmt, &mytm);
3444 if (buflen > 0 && buflen < bufsize)
3446 /* heuristic to prevent out-of-memory errors */
3447 if (bufsize > 100*fmtlen) {
3453 Renew(buf, bufsize, char);
3458 Perl_croak(aTHX_ "panic: no strftime");
3463 #define SV_CWD_RETURN_UNDEF \
3464 sv_setsv(sv, &PL_sv_undef); \
3467 #define SV_CWD_ISDOT(dp) \
3468 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3469 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
3472 =head1 Miscellaneous Functions
3474 =for apidoc getcwd_sv
3476 Fill the sv with current working directory
3481 /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3482 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3483 * getcwd(3) if available
3484 * Comments from the orignal:
3485 * This is a faster version of getcwd. It's also more dangerous
3486 * because you might chdir out of a directory that you can't chdir
3490 Perl_getcwd_sv(pTHX_ register SV *sv)
3494 #ifndef INCOMPLETE_TAINTS
3500 char buf[MAXPATHLEN];
3502 /* Some getcwd()s automatically allocate a buffer of the given
3503 * size from the heap if they are given a NULL buffer pointer.
3504 * The problem is that this behaviour is not portable. */
3505 if (getcwd(buf, sizeof(buf) - 1)) {
3506 STRLEN len = strlen(buf);
3507 sv_setpvn(sv, buf, len);
3511 sv_setsv(sv, &PL_sv_undef);
3519 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
3520 int namelen, pathlen=0;
3524 (void)SvUPGRADE(sv, SVt_PV);
3526 if (PerlLIO_lstat(".", &statbuf) < 0) {
3527 SV_CWD_RETURN_UNDEF;
3530 orig_cdev = statbuf.st_dev;
3531 orig_cino = statbuf.st_ino;
3539 if (PerlDir_chdir("..") < 0) {
3540 SV_CWD_RETURN_UNDEF;
3542 if (PerlLIO_stat(".", &statbuf) < 0) {
3543 SV_CWD_RETURN_UNDEF;
3546 cdev = statbuf.st_dev;
3547 cino = statbuf.st_ino;
3549 if (odev == cdev && oino == cino) {
3552 if (!(dir = PerlDir_open("."))) {
3553 SV_CWD_RETURN_UNDEF;
3556 while ((dp = PerlDir_read(dir)) != NULL) {
3558 namelen = dp->d_namlen;
3560 namelen = strlen(dp->d_name);
3563 if (SV_CWD_ISDOT(dp)) {
3567 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
3568 SV_CWD_RETURN_UNDEF;
3571 tdev = statbuf.st_dev;
3572 tino = statbuf.st_ino;
3573 if (tino == oino && tdev == odev) {
3579 SV_CWD_RETURN_UNDEF;
3582 if (pathlen + namelen + 1 >= MAXPATHLEN) {
3583 SV_CWD_RETURN_UNDEF;
3586 SvGROW(sv, pathlen + namelen + 1);
3590 Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char);
3593 /* prepend current directory to the front */
3595 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
3596 pathlen += (namelen + 1);
3598 #ifdef VOID_CLOSEDIR
3601 if (PerlDir_close(dir) < 0) {
3602 SV_CWD_RETURN_UNDEF;
3608 SvCUR_set(sv, pathlen);
3612 if (PerlDir_chdir(SvPVX(sv)) < 0) {
3613 SV_CWD_RETURN_UNDEF;
3616 if (PerlLIO_stat(".", &statbuf) < 0) {
3617 SV_CWD_RETURN_UNDEF;
3620 cdev = statbuf.st_dev;
3621 cino = statbuf.st_ino;
3623 if (cdev != orig_cdev || cino != orig_cino) {
3624 Perl_croak(aTHX_ "Unstable directory path, "
3625 "current directory changed unexpectedly");
3637 =for apidoc scan_version
3639 Returns a pointer to the next character after the parsed
3640 version string, as well as upgrading the passed in SV to
3643 Function must be called with an already existing SV like
3646 s = scan_version(s,sv);
3648 Performs some preprocessing to the string to ensure that
3649 it has the correct characteristics of a version. Flags the
3650 object if it contains an underscore (which denotes this
3657 Perl_scan_version(pTHX_ char *s, SV *rv)
3659 const char *start = s;
3663 SV* sv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
3664 (void)sv_upgrade(sv, SVt_PVAV); /* needs to be an AV type */
3666 /* pre-scan the imput string to check for decimals */
3667 while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) )
3672 Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
3675 else if ( *pos == '_' )
3678 Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
3685 if (*pos == 'v') pos++; /* get past 'v' */
3686 while (isDIGIT(*pos))
3688 if (!isALPHA(*pos)) {
3691 if (*s == 'v') s++; /* get past 'v' */
3696 /* this is atoi() that delimits on underscores */
3700 if ( s < pos && s > start && *(s-1) == '_' ) {
3701 mult *= -1; /* beta version */
3703 /* the following if() will only be true after the decimal
3704 * point of a version originally created with a bare
3705 * floating point number, i.e. not quoted in any way
3707 if ( s > start+1 && saw_period == 1 && !saw_under ) {
3711 rev += (*s - '0') * mult;
3713 if ( PERL_ABS(orev) > PERL_ABS(rev) )
3714 Perl_croak(aTHX_ "Integer overflow in version");
3719 while (--end >= s) {
3721 rev += (*end - '0') * mult;
3723 if ( PERL_ABS(orev) > PERL_ABS(rev) )
3724 Perl_croak(aTHX_ "Integer overflow in version");
3729 /* Append revision */
3730 av_push((AV *)sv, newSViv(rev));
3731 if ( (*pos == '.' || *pos == '_') && isDIGIT(pos[1]))
3733 else if ( isDIGIT(*pos) )
3739 while ( isDIGIT(*pos) ) {
3740 if ( !saw_under && saw_period == 1 && pos-s == 3 )
3750 =for apidoc new_version
3752 Returns a new version object based on the passed in SV:
3754 SV *sv = new_version(SV *ver);
3756 Does not alter the passed in ver SV. See "upg_version" if you
3757 want to upgrade the SV.
3763 Perl_new_version(pTHX_ SV *ver)
3767 if ( SvNOK(ver) ) /* may get too much accuracy */
3770 sprintf(tbuf,"%.9"NVgf, SvNVX(ver));
3771 version = savepv(tbuf);
3774 else if ( SvVOK(ver) ) { /* already a v-string */
3775 MAGIC* mg = mg_find(ver,PERL_MAGIC_vstring);
3776 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
3779 else /* must be a string or something like a string */
3781 version = (char *)SvPV(ver,PL_na);
3783 version = scan_version(version,rv);
3788 =for apidoc upg_version
3790 In-place upgrade of the supplied SV to a version object.
3792 SV *sv = upg_version(SV *sv);
3794 Returns a pointer to the upgraded SV.
3800 Perl_upg_version(pTHX_ SV *ver)
3802 char *version = savepvn(SvPVX(ver),SvCUR(ver));
3804 if ( SvVOK(ver) ) { /* already a v-string */
3805 MAGIC* mg = mg_find(ver,PERL_MAGIC_vstring);
3806 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
3809 version = scan_version(version,ver);
3817 Accepts a version object and returns the normalized floating
3818 point representation. Call like:
3822 NOTE: you can pass either the object directly or the SV
3823 contained within the RV.
3829 Perl_vnumify(pTHX_ SV *vs)
3832 SV *sv = NEWSV(92,0);
3835 len = av_len((AV *)vs);
3838 Perl_sv_catpv(aTHX_ sv,"0");
3841 digit = SvIVX(*av_fetch((AV *)vs, 0, 0));
3842 Perl_sv_setpvf(aTHX_ sv,"%d.", PERL_ABS(digit));
3843 for ( i = 1 ; i <= len ; i++ )
3845 digit = SvIVX(*av_fetch((AV *)vs, i, 0));
3846 Perl_sv_catpvf(aTHX_ sv,"%03d", PERL_ABS(digit));
3849 Perl_sv_catpv(aTHX_ sv,"000");
3850 sv_setnv(sv, SvNV(sv));
3855 =for apidoc vstringify
3857 Accepts a version object and returns the normalized string
3858 representation. Call like:
3860 sv = vstringify(rv);
3862 NOTE: you can pass either the object directly or the SV
3863 contained within the RV.
3869 Perl_vstringify(pTHX_ SV *vs)
3872 SV *sv = NEWSV(92,0);
3875 len = av_len((AV *)vs);
3878 Perl_sv_catpv(aTHX_ sv,"");
3881 digit = SvIVX(*av_fetch((AV *)vs, 0, 0));
3882 Perl_sv_setpvf(aTHX_ sv,"%"IVdf,(IV)digit);
3883 for ( i = 1 ; i <= len ; i++ )
3885 digit = SvIVX(*av_fetch((AV *)vs, i, 0));
3887 Perl_sv_catpvf(aTHX_ sv,"_%"IVdf,(IV)-digit);
3889 Perl_sv_catpvf(aTHX_ sv,".%"IVdf,(IV)digit);
3892 Perl_sv_catpv(aTHX_ sv,".0");
3899 Version object aware cmp. Both operands must already have been
3900 converted into version objects.
3906 Perl_vcmp(pTHX_ SV *lsv, SV *rsv)
3913 l = av_len((AV *)lsv);
3914 r = av_len((AV *)rsv);
3918 while ( i <= m && retval == 0 )
3920 I32 left = SvIV(*av_fetch((AV *)lsv,i,0));
3921 I32 right = SvIV(*av_fetch((AV *)rsv,i,0));
3922 bool lbeta = left < 0 ? 1 : 0;
3923 bool rbeta = right < 0 ? 1 : 0;
3924 left = PERL_ABS(left);
3925 right = PERL_ABS(right);
3926 if ( left < right || (left == right && lbeta && !rbeta) )
3928 if ( left > right || (left == right && rbeta && !lbeta) )
3933 if ( l != r && retval == 0 ) /* possible match except for trailing 0 */
3935 if ( !( l < r && r-l == 1 && SvIV(*av_fetch((AV *)rsv,r,0)) == 0 ) &&
3936 !( l-r == 1 && SvIV(*av_fetch((AV *)lsv,l,0)) == 0 ) )
3938 retval = l < r ? -1 : +1; /* not a match after all */
3944 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
3945 # define EMULATE_SOCKETPAIR_UDP
3948 #ifdef EMULATE_SOCKETPAIR_UDP
3950 S_socketpair_udp (int fd[2]) {
3952 /* Fake a datagram socketpair using UDP to localhost. */
3953 int sockets[2] = {-1, -1};
3954 struct sockaddr_in addresses[2];
3956 Sock_size_t size = sizeof(struct sockaddr_in);
3957 unsigned short port;
3960 memset(&addresses, 0, sizeof(addresses));
3963 sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
3964 if (sockets[i] == -1)
3965 goto tidy_up_and_fail;
3967 addresses[i].sin_family = AF_INET;
3968 addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
3969 addresses[i].sin_port = 0; /* kernel choses port. */
3970 if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
3971 sizeof(struct sockaddr_in)) == -1)
3972 goto tidy_up_and_fail;
3975 /* Now have 2 UDP sockets. Find out which port each is connected to, and
3976 for each connect the other socket to it. */
3979 if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
3981 goto tidy_up_and_fail;
3982 if (size != sizeof(struct sockaddr_in))
3983 goto abort_tidy_up_and_fail;
3984 /* !1 is 0, !0 is 1 */
3985 if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
3986 sizeof(struct sockaddr_in)) == -1)
3987 goto tidy_up_and_fail;
3990 /* Now we have 2 sockets connected to each other. I don't trust some other
3991 process not to have already sent a packet to us (by random) so send
3992 a packet from each to the other. */
3995 /* I'm going to send my own port number. As a short.
3996 (Who knows if someone somewhere has sin_port as a bitfield and needs
3997 this routine. (I'm assuming crays have socketpair)) */
3998 port = addresses[i].sin_port;
3999 got = PerlLIO_write(sockets[i], &port, sizeof(port));
4000 if (got != sizeof(port)) {
4002 goto tidy_up_and_fail;
4003 goto abort_tidy_up_and_fail;
4007 /* Packets sent. I don't trust them to have arrived though.
4008 (As I understand it Solaris TCP stack is multithreaded. Non-blocking
4009 connect to localhost will use a second kernel thread. In 2.6 the
4010 first thread running the connect() returns before the second completes,
4011 so EINPROGRESS> In 2.7 the improved stack is faster and connect()
4012 returns 0. Poor programs have tripped up. One poor program's authors'
4013 had a 50-1 reverse stock split. Not sure how connected these were.)
4014 So I don't trust someone not to have an unpredictable UDP stack.
4018 struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
4019 int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
4023 FD_SET(sockets[0], &rset);
4024 FD_SET(sockets[1], &rset);
4026 got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
4027 if (got != 2 || !FD_ISSET(sockets[0], &rset)
4028 || !FD_ISSET(sockets[1], &rset)) {
4029 /* I hope this is portable and appropriate. */
4031 goto tidy_up_and_fail;
4032 goto abort_tidy_up_and_fail;
4036 /* And the paranoia department even now doesn't trust it to have arrive
4037 (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
4039 struct sockaddr_in readfrom;
4040 unsigned short buffer[2];
4045 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4046 sizeof(buffer), MSG_DONTWAIT,
4047 (struct sockaddr *) &readfrom, &size);
4049 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4051 (struct sockaddr *) &readfrom, &size);
4055 goto tidy_up_and_fail;
4056 if (got != sizeof(port)
4057 || size != sizeof(struct sockaddr_in)
4058 /* Check other socket sent us its port. */
4059 || buffer[0] != (unsigned short) addresses[!i].sin_port
4060 /* Check kernel says we got the datagram from that socket */
4061 || readfrom.sin_family != addresses[!i].sin_family
4062 || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
4063 || readfrom.sin_port != addresses[!i].sin_port)
4064 goto abort_tidy_up_and_fail;
4067 /* My caller (my_socketpair) has validated that this is non-NULL */
4070 /* I hereby declare this connection open. May God bless all who cross
4074 abort_tidy_up_and_fail:
4075 errno = ECONNABORTED;
4078 int save_errno = errno;
4079 if (sockets[0] != -1)
4080 PerlLIO_close(sockets[0]);
4081 if (sockets[1] != -1)
4082 PerlLIO_close(sockets[1]);
4087 #endif /* EMULATE_SOCKETPAIR_UDP */
4089 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
4091 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4092 /* Stevens says that family must be AF_LOCAL, protocol 0.
4093 I'm going to enforce that, then ignore it, and use TCP (or UDP). */
4098 struct sockaddr_in listen_addr;
4099 struct sockaddr_in connect_addr;
4104 || family != AF_UNIX
4107 errno = EAFNOSUPPORT;
4115 #ifdef EMULATE_SOCKETPAIR_UDP
4116 if (type == SOCK_DGRAM)
4117 return S_socketpair_udp(fd);
4120 listener = PerlSock_socket(AF_INET, type, 0);
4123 memset(&listen_addr, 0, sizeof(listen_addr));
4124 listen_addr.sin_family = AF_INET;
4125 listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4126 listen_addr.sin_port = 0; /* kernel choses port. */
4127 if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
4128 sizeof(listen_addr)) == -1)
4129 goto tidy_up_and_fail;
4130 if (PerlSock_listen(listener, 1) == -1)
4131 goto tidy_up_and_fail;
4133 connector = PerlSock_socket(AF_INET, type, 0);
4134 if (connector == -1)
4135 goto tidy_up_and_fail;
4136 /* We want to find out the port number to connect to. */
4137 size = sizeof(connect_addr);
4138 if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
4140 goto tidy_up_and_fail;
4141 if (size != sizeof(connect_addr))
4142 goto abort_tidy_up_and_fail;
4143 if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
4144 sizeof(connect_addr)) == -1)
4145 goto tidy_up_and_fail;
4147 size = sizeof(listen_addr);
4148 acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
4151 goto tidy_up_and_fail;
4152 if (size != sizeof(listen_addr))
4153 goto abort_tidy_up_and_fail;
4154 PerlLIO_close(listener);
4155 /* Now check we are talking to ourself by matching port and host on the
4157 if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
4159 goto tidy_up_and_fail;
4160 if (size != sizeof(connect_addr)
4161 || listen_addr.sin_family != connect_addr.sin_family
4162 || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
4163 || listen_addr.sin_port != connect_addr.sin_port) {
4164 goto abort_tidy_up_and_fail;
4170 abort_tidy_up_and_fail:
4171 errno = ECONNABORTED; /* I hope this is portable and appropriate. */
4174 int save_errno = errno;
4176 PerlLIO_close(listener);
4177 if (connector != -1)
4178 PerlLIO_close(connector);
4180 PerlLIO_close(acceptor);
4186 /* In any case have a stub so that there's code corresponding
4187 * to the my_socketpair in global.sym. */
4189 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4190 #ifdef HAS_SOCKETPAIR
4191 return socketpair(family, type, protocol, fd);
4200 =for apidoc sv_nosharing
4202 Dummy routine which "shares" an SV when there is no sharing module present.
4203 Exists to avoid test for a NULL function pointer and because it could potentially warn under
4204 some level of strict-ness.
4210 Perl_sv_nosharing(pTHX_ SV *sv)
4215 =for apidoc sv_nolocking
4217 Dummy routine which "locks" an SV when there is no locking module present.
4218 Exists to avoid test for a NULL function pointer and because it could potentially warn under
4219 some level of strict-ness.
4225 Perl_sv_nolocking(pTHX_ SV *sv)
4231 =for apidoc sv_nounlocking
4233 Dummy routine which "unlocks" an SV when there is no locking module present.
4234 Exists to avoid test for a NULL function pointer and because it could potentially warn under
4235 some level of strict-ness.
4241 Perl_sv_nounlocking(pTHX_ SV *sv)
4246 Perl_parse_unicode_opts(pTHX_ char **popt)
4253 opt = (U32) atoi(p);
4254 while (isDIGIT(*p)) p++;
4255 if (*p && *p != '\n' && *p != '\r')
4256 Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
4261 case PERL_UNICODE_STDIN:
4262 opt |= PERL_UNICODE_STDIN_FLAG; break;
4263 case PERL_UNICODE_STDOUT:
4264 opt |= PERL_UNICODE_STDOUT_FLAG; break;
4265 case PERL_UNICODE_STDERR:
4266 opt |= PERL_UNICODE_STDERR_FLAG; break;
4267 case PERL_UNICODE_STD:
4268 opt |= PERL_UNICODE_STD_FLAG; break;
4269 case PERL_UNICODE_IN:
4270 opt |= PERL_UNICODE_IN_FLAG; break;
4271 case PERL_UNICODE_OUT:
4272 opt |= PERL_UNICODE_OUT_FLAG; break;
4273 case PERL_UNICODE_INOUT:
4274 opt |= PERL_UNICODE_INOUT_FLAG; break;
4275 case PERL_UNICODE_LOCALE:
4276 opt |= PERL_UNICODE_LOCALE_FLAG; break;
4277 case PERL_UNICODE_ARGV:
4278 opt |= PERL_UNICODE_ARGV_FLAG; break;
4280 if (*p != '\n' && *p != '\r')
4282 "Unknown Unicode option letter '%c'", *p);
4288 opt = PERL_UNICODE_DEFAULT_FLAGS;
4290 if (opt & ~PERL_UNICODE_ALL_FLAGS)
4291 Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
4292 (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
4303 * This is really just a quick hack which grabs various garbage
4304 * values. It really should be a real hash algorithm which
4305 * spreads the effect of every input bit onto every output bit,
4306 * if someone who knows about such things would bother to write it.
4307 * Might be a good idea to add that function to CORE as well.
4308 * No numbers below come from careful analysis or anything here,
4309 * except they are primes and SEED_C1 > 1E6 to get a full-width
4310 * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
4311 * probably be bigger too.
4314 # define SEED_C1 1000003
4315 #define SEED_C4 73819
4317 # define SEED_C1 25747
4318 #define SEED_C4 20639
4322 #define SEED_C5 26107
4324 #ifndef PERL_NO_DEV_RANDOM
4329 # include <starlet.h>
4330 /* when[] = (low 32 bits, high 32 bits) of time since epoch
4331 * in 100-ns units, typically incremented ever 10 ms. */
4332 unsigned int when[2];
4334 # ifdef HAS_GETTIMEOFDAY
4335 struct timeval when;
4341 /* This test is an escape hatch, this symbol isn't set by Configure. */
4342 #ifndef PERL_NO_DEV_RANDOM
4343 #ifndef PERL_RANDOM_DEVICE
4344 /* /dev/random isn't used by default because reads from it will block
4345 * if there isn't enough entropy available. You can compile with
4346 * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there
4347 * is enough real entropy to fill the seed. */
4348 # define PERL_RANDOM_DEVICE "/dev/urandom"
4350 fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0);
4352 if (PerlLIO_read(fd, &u, sizeof u) != sizeof u)
4361 _ckvmssts(sys$gettim(when));
4362 u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1];
4364 # ifdef HAS_GETTIMEOFDAY
4365 PerlProc_gettimeofday(&when,NULL);
4366 u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec;
4369 u = (U32)SEED_C1 * when;
4372 u += SEED_C3 * (U32)PerlProc_getpid();
4373 u += SEED_C4 * (U32)PTR2UV(PL_stack_sp);
4374 #ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */
4375 u += SEED_C5 * (U32)PTR2UV(&when);
4381 Perl_get_hash_seed(pTHX)
4383 char *s = PerlEnv_getenv("PERL_HASH_SEED");
4387 while (isSPACE(*s)) s++;
4388 if (s && isDIGIT(*s))
4389 myseed = (UV)Atoul(s);
4391 #ifdef USE_HASH_SEED_EXPLICIT
4395 /* Compute a random seed */
4396 (void)seedDrand01((Rand_seed_t)seed());
4397 PL_srand_called = TRUE;
4398 myseed = (UV)(Drand01() * (NV)UV_MAX);
4399 #if RANDBITS < (UVSIZE * 8)
4400 /* Since there are not enough randbits to to reach all
4401 * the bits of a UV, the low bits might need extra
4402 * help. Sum in another random number that will
4403 * fill in the low bits. */
4405 (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
4406 #endif /* RANDBITS < (UVSIZE * 8) */
4408 PL_hash_seed_set = TRUE;