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_vdie(pTHX_ const char* pat, va_list *args)
984 int was_in_eval = PL_in_eval;
991 DEBUG_S(PerlIO_printf(Perl_debug_log,
992 "%p: die: curstack = %p, mainstack = %p\n",
993 thr, PL_curstack, PL_mainstack));
996 msv = vmess(pat, args);
997 if (PL_errors && SvCUR(PL_errors)) {
998 sv_catsv(PL_errors, msv);
999 message = SvPV(PL_errors, msglen);
1000 SvCUR_set(PL_errors, 0);
1003 message = SvPV(msv,msglen);
1010 DEBUG_S(PerlIO_printf(Perl_debug_log,
1011 "%p: die: message = %s\ndiehook = %p\n",
1012 thr, message, PL_diehook));
1014 /* sv_2cv might call Perl_croak() */
1015 SV *olddiehook = PL_diehook;
1017 SAVESPTR(PL_diehook);
1018 PL_diehook = Nullsv;
1019 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1021 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1028 msg = newSVpvn(message, msglen);
1036 PUSHSTACKi(PERLSI_DIEHOOK);
1040 call_sv((SV*)cv, G_DISCARD);
1046 PL_restartop = die_where(message, msglen);
1047 DEBUG_S(PerlIO_printf(Perl_debug_log,
1048 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
1049 thr, PL_restartop, was_in_eval, PL_top_env));
1050 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
1052 return PL_restartop;
1055 #if defined(PERL_IMPLICIT_CONTEXT)
1057 Perl_die_nocontext(const char* pat, ...)
1062 va_start(args, pat);
1063 o = vdie(pat, &args);
1067 #endif /* PERL_IMPLICIT_CONTEXT */
1070 Perl_die(pTHX_ const char* pat, ...)
1074 va_start(args, pat);
1075 o = vdie(pat, &args);
1081 Perl_vcroak(pTHX_ const char* pat, va_list *args)
1091 msv = vmess(pat, args);
1092 if (PL_errors && SvCUR(PL_errors)) {
1093 sv_catsv(PL_errors, msv);
1094 message = SvPV(PL_errors, msglen);
1095 SvCUR_set(PL_errors, 0);
1098 message = SvPV(msv,msglen);
1105 DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s",
1106 PTR2UV(thr), message));
1109 /* sv_2cv might call Perl_croak() */
1110 SV *olddiehook = PL_diehook;
1112 SAVESPTR(PL_diehook);
1113 PL_diehook = Nullsv;
1114 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1116 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1123 msg = newSVpvn(message, msglen);
1131 PUSHSTACKi(PERLSI_DIEHOOK);
1135 call_sv((SV*)cv, G_DISCARD);
1141 PL_restartop = die_where(message, msglen);
1145 message = SvPVx(ERRSV, msglen);
1149 /* SFIO can really mess with your errno */
1152 PerlIO *serr = Perl_error_log;
1154 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1155 (void)PerlIO_flush(serr);
1163 #if defined(PERL_IMPLICIT_CONTEXT)
1165 Perl_croak_nocontext(const char *pat, ...)
1169 va_start(args, pat);
1174 #endif /* PERL_IMPLICIT_CONTEXT */
1177 =head1 Warning and Dieing
1181 This is the XSUB-writer's interface to Perl's C<die> function.
1182 Normally use this function the same way you use the C C<printf>
1183 function. See C<warn>.
1185 If you want to throw an exception object, assign the object to
1186 C<$@> and then pass C<Nullch> to croak():
1188 errsv = get_sv("@", TRUE);
1189 sv_setsv(errsv, exception_object);
1196 Perl_croak(pTHX_ const char *pat, ...)
1199 va_start(args, pat);
1206 Perl_vwarn(pTHX_ const char* pat, va_list *args)
1217 msv = vmess(pat, args);
1218 message = SvPV(msv, msglen);
1221 /* sv_2cv might call Perl_warn() */
1222 SV *oldwarnhook = PL_warnhook;
1224 SAVESPTR(PL_warnhook);
1225 PL_warnhook = Nullsv;
1226 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1228 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1234 msg = newSVpvn(message, msglen);
1238 PUSHSTACKi(PERLSI_WARNHOOK);
1242 call_sv((SV*)cv, G_DISCARD);
1249 /* if STDERR is tied, use it instead */
1250 if (PL_stderrgv && SvREFCNT(PL_stderrgv) && (io = GvIO(PL_stderrgv))
1251 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) {
1254 XPUSHs(SvTIED_obj((SV*)io, mg));
1255 XPUSHs(sv_2mortal(newSVpvn(message, msglen)));
1257 call_method("PRINT", G_SCALAR);
1263 PerlIO *serr = Perl_error_log;
1265 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1266 (void)PerlIO_flush(serr);
1270 #if defined(PERL_IMPLICIT_CONTEXT)
1272 Perl_warn_nocontext(const char *pat, ...)
1276 va_start(args, pat);
1280 #endif /* PERL_IMPLICIT_CONTEXT */
1285 This is the XSUB-writer's interface to Perl's C<warn> function. Use this
1286 function the same way you use the C C<printf> function. See
1293 Perl_warn(pTHX_ const char *pat, ...)
1296 va_start(args, pat);
1301 #if defined(PERL_IMPLICIT_CONTEXT)
1303 Perl_warner_nocontext(U32 err, const char *pat, ...)
1307 va_start(args, pat);
1308 vwarner(err, pat, &args);
1311 #endif /* PERL_IMPLICIT_CONTEXT */
1314 Perl_warner(pTHX_ U32 err, const char* pat,...)
1317 va_start(args, pat);
1318 vwarner(err, pat, &args);
1323 Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1332 msv = vmess(pat, args);
1333 message = SvPV(msv, msglen);
1337 /* sv_2cv might call Perl_croak() */
1338 SV *olddiehook = PL_diehook;
1340 SAVESPTR(PL_diehook);
1341 PL_diehook = Nullsv;
1342 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1344 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1350 msg = newSVpvn(message, msglen);
1354 PUSHSTACKi(PERLSI_DIEHOOK);
1358 call_sv((SV*)cv, G_DISCARD);
1364 PL_restartop = die_where(message, msglen);
1368 PerlIO *serr = Perl_error_log;
1369 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1370 (void)PerlIO_flush(serr);
1376 /* sv_2cv might call Perl_warn() */
1377 SV *oldwarnhook = PL_warnhook;
1379 SAVESPTR(PL_warnhook);
1380 PL_warnhook = Nullsv;
1381 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1383 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1389 msg = newSVpvn(message, msglen);
1393 PUSHSTACKi(PERLSI_WARNHOOK);
1397 call_sv((SV*)cv, G_DISCARD);
1404 PerlIO *serr = Perl_error_log;
1405 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1406 (void)PerlIO_flush(serr);
1411 /* since we've already done strlen() for both nam and val
1412 * we can use that info to make things faster than
1413 * sprintf(s, "%s=%s", nam, val)
1415 #define my_setenv_format(s, nam, nlen, val, vlen) \
1416 Copy(nam, s, nlen, char); \
1418 Copy(val, s+(nlen+1), vlen, char); \
1419 *(s+(nlen+1+vlen)) = '\0'
1421 #ifdef USE_ENVIRON_ARRAY
1422 /* VMS' my_setenv() is in vms.c */
1423 #if !defined(WIN32) && !defined(NETWARE)
1425 Perl_my_setenv(pTHX_ char *nam, char *val)
1428 /* only parent thread can modify process environment */
1429 if (PL_curinterp == aTHX)
1432 #ifndef PERL_USE_SAFE_PUTENV
1433 /* most putenv()s leak, so we manipulate environ directly */
1434 register I32 i=setenv_getix(nam); /* where does it go? */
1437 if (environ == PL_origenviron) { /* need we copy environment? */
1443 for (max = i; environ[max]; max++) ;
1444 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1445 for (j=0; j<max; j++) { /* copy environment */
1446 int len = strlen(environ[j]);
1447 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1448 Copy(environ[j], tmpenv[j], len+1, char);
1450 tmpenv[max] = Nullch;
1451 environ = tmpenv; /* tell exec where it is now */
1454 safesysfree(environ[i]);
1455 while (environ[i]) {
1456 environ[i] = environ[i+1];
1461 if (!environ[i]) { /* does not exist yet */
1462 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1463 environ[i+1] = Nullch; /* make sure it's null terminated */
1466 safesysfree(environ[i]);
1470 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1471 /* all that work just for this */
1472 my_setenv_format(environ[i], nam, nlen, val, vlen);
1474 #else /* PERL_USE_SAFE_PUTENV */
1475 # if defined(__CYGWIN__) || defined( EPOC)
1476 setenv(nam, val, 1);
1479 int nlen = strlen(nam), vlen;
1484 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1485 /* all that work just for this */
1486 my_setenv_format(new_env, nam, nlen, val, vlen);
1487 (void)putenv(new_env);
1488 # endif /* __CYGWIN__ */
1489 #endif /* PERL_USE_SAFE_PUTENV */
1493 #else /* WIN32 || NETWARE */
1496 Perl_my_setenv(pTHX_ char *nam,char *val)
1498 register char *envstr;
1499 int nlen = strlen(nam), vlen;
1505 New(904, envstr, nlen+vlen+2, char);
1506 my_setenv_format(envstr, nam, nlen, val, vlen);
1507 (void)PerlEnv_putenv(envstr);
1511 #endif /* WIN32 || NETWARE */
1514 Perl_setenv_getix(pTHX_ char *nam)
1516 register I32 i, len = strlen(nam);
1518 for (i = 0; environ[i]; i++) {
1521 strnicmp(environ[i],nam,len) == 0
1523 strnEQ(environ[i],nam,len)
1525 && environ[i][len] == '=')
1526 break; /* strnEQ must come first to avoid */
1527 } /* potential SEGV's */
1531 #endif /* !VMS && !EPOC*/
1533 #ifdef UNLINK_ALL_VERSIONS
1535 Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
1539 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
1544 /* this is a drop-in replacement for bcopy() */
1545 #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
1547 Perl_my_bcopy(register const char *from,register char *to,register I32 len)
1551 if (from - to >= 0) {
1559 *(--to) = *(--from);
1565 /* this is a drop-in replacement for memset() */
1568 Perl_my_memset(register char *loc, register I32 ch, register I32 len)
1578 /* this is a drop-in replacement for bzero() */
1579 #if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
1581 Perl_my_bzero(register char *loc, register I32 len)
1591 /* this is a drop-in replacement for memcmp() */
1592 #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
1594 Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
1596 register U8 *a = (U8 *)s1;
1597 register U8 *b = (U8 *)s2;
1601 if (tmp = *a++ - *b++)
1606 #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
1610 #ifdef USE_CHAR_VSPRINTF
1615 vsprintf(char *dest, const char *pat, char *args)
1619 fakebuf._ptr = dest;
1620 fakebuf._cnt = 32767;
1624 fakebuf._flag = _IOWRT|_IOSTRG;
1625 _doprnt(pat, args, &fakebuf); /* what a kludge */
1626 (void)putc('\0', &fakebuf);
1627 #ifdef USE_CHAR_VSPRINTF
1630 return 0; /* perl doesn't use return value */
1634 #endif /* HAS_VPRINTF */
1637 #if BYTEORDER != 0x4321
1639 Perl_my_swap(pTHX_ short s)
1641 #if (BYTEORDER & 1) == 0
1644 result = ((s & 255) << 8) + ((s >> 8) & 255);
1652 Perl_my_htonl(pTHX_ long l)
1656 char c[sizeof(long)];
1659 #if BYTEORDER == 0x1234
1660 u.c[0] = (l >> 24) & 255;
1661 u.c[1] = (l >> 16) & 255;
1662 u.c[2] = (l >> 8) & 255;
1666 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1667 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1672 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1673 u.c[o & 0xf] = (l >> s) & 255;
1681 Perl_my_ntohl(pTHX_ long l)
1685 char c[sizeof(long)];
1688 #if BYTEORDER == 0x1234
1689 u.c[0] = (l >> 24) & 255;
1690 u.c[1] = (l >> 16) & 255;
1691 u.c[2] = (l >> 8) & 255;
1695 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1696 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1703 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1704 l |= (u.c[o & 0xf] & 255) << s;
1711 #endif /* BYTEORDER != 0x4321 */
1715 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1716 * If these functions are defined,
1717 * the BYTEORDER is neither 0x1234 nor 0x4321.
1718 * However, this is not assumed.
1722 #define HTOV(name,type) \
1724 name (register type n) \
1728 char c[sizeof(type)]; \
1732 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1733 u.c[i] = (n >> s) & 0xFF; \
1738 #define VTOH(name,type) \
1740 name (register type n) \
1744 char c[sizeof(type)]; \
1750 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1751 n += (u.c[i] & 0xFF) << s; \
1756 #if defined(HAS_HTOVS) && !defined(htovs)
1759 #if defined(HAS_HTOVL) && !defined(htovl)
1762 #if defined(HAS_VTOHS) && !defined(vtohs)
1765 #if defined(HAS_VTOHL) && !defined(vtohl)
1770 Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
1772 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
1774 register I32 This, that;
1780 PERL_FLUSHALL_FOR_CHILD;
1781 This = (*mode == 'w');
1785 taint_proper("Insecure %s%s", "EXEC");
1787 if (PerlProc_pipe(p) < 0)
1789 /* Try for another pipe pair for error return */
1790 if (PerlProc_pipe(pp) >= 0)
1792 while ((pid = PerlProc_fork()) < 0) {
1793 if (errno != EAGAIN) {
1794 PerlLIO_close(p[This]);
1795 PerlLIO_close(p[that]);
1797 PerlLIO_close(pp[0]);
1798 PerlLIO_close(pp[1]);
1810 /* Close parent's end of error status pipe (if any) */
1812 PerlLIO_close(pp[0]);
1813 #if defined(HAS_FCNTL) && defined(F_SETFD)
1814 /* Close error pipe automatically if exec works */
1815 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1818 /* Now dup our end of _the_ pipe to right position */
1819 if (p[THIS] != (*mode == 'r')) {
1820 PerlLIO_dup2(p[THIS], *mode == 'r');
1821 PerlLIO_close(p[THIS]);
1822 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
1823 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1826 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1827 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
1828 /* No automatic close - do it by hand */
1835 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
1841 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
1847 do_execfree(); /* free any memory malloced by child on fork */
1849 PerlLIO_close(pp[1]);
1850 /* Keep the lower of the two fd numbers */
1851 if (p[that] < p[This]) {
1852 PerlLIO_dup2(p[This], p[that]);
1853 PerlLIO_close(p[This]);
1857 PerlLIO_close(p[that]); /* close child's end of pipe */
1860 sv = *av_fetch(PL_fdpid,p[This],TRUE);
1862 (void)SvUPGRADE(sv,SVt_IV);
1864 PL_forkprocess = pid;
1865 /* If we managed to get status pipe check for exec fail */
1866 if (did_pipes && pid > 0) {
1870 while (n < sizeof(int)) {
1871 n1 = PerlLIO_read(pp[0],
1872 (void*)(((char*)&errkid)+n),
1878 PerlLIO_close(pp[0]);
1880 if (n) { /* Error */
1882 PerlLIO_close(p[This]);
1883 if (n != sizeof(int))
1884 Perl_croak(aTHX_ "panic: kid popen errno read");
1886 pid2 = wait4pid(pid, &status, 0);
1887 } while (pid2 == -1 && errno == EINTR);
1888 errno = errkid; /* Propagate errno from kid */
1893 PerlLIO_close(pp[0]);
1894 return PerlIO_fdopen(p[This], mode);
1896 Perl_croak(aTHX_ "List form of piped open not implemented");
1897 return (PerlIO *) NULL;
1901 /* VMS' my_popen() is in VMS.c, same with OS/2. */
1902 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
1904 Perl_my_popen(pTHX_ char *cmd, char *mode)
1907 register I32 This, that;
1910 I32 doexec = strNE(cmd,"-");
1914 PERL_FLUSHALL_FOR_CHILD;
1917 return my_syspopen(aTHX_ cmd,mode);
1920 This = (*mode == 'w');
1922 if (doexec && PL_tainting) {
1924 taint_proper("Insecure %s%s", "EXEC");
1926 if (PerlProc_pipe(p) < 0)
1928 if (doexec && PerlProc_pipe(pp) >= 0)
1930 while ((pid = PerlProc_fork()) < 0) {
1931 if (errno != EAGAIN) {
1932 PerlLIO_close(p[This]);
1933 PerlLIO_close(p[that]);
1935 PerlLIO_close(pp[0]);
1936 PerlLIO_close(pp[1]);
1939 Perl_croak(aTHX_ "Can't fork");
1952 PerlLIO_close(pp[0]);
1953 #if defined(HAS_FCNTL) && defined(F_SETFD)
1954 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1957 if (p[THIS] != (*mode == 'r')) {
1958 PerlLIO_dup2(p[THIS], *mode == 'r');
1959 PerlLIO_close(p[THIS]);
1960 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
1961 PerlLIO_close(p[THAT]);
1964 PerlLIO_close(p[THAT]);
1967 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
1976 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
1981 /* may or may not use the shell */
1982 do_exec3(cmd, pp[1], did_pipes);
1985 #endif /* defined OS2 */
1987 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
1988 SvREADONLY_off(GvSV(tmpgv));
1989 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
1990 SvREADONLY_on(GvSV(tmpgv));
1992 #ifdef THREADS_HAVE_PIDS
1993 PL_ppid = (IV)getppid();
1996 hv_clear(PL_pidstatus); /* we have no children */
2001 do_execfree(); /* free any memory malloced by child on vfork */
2003 PerlLIO_close(pp[1]);
2004 if (p[that] < p[This]) {
2005 PerlLIO_dup2(p[This], p[that]);
2006 PerlLIO_close(p[This]);
2010 PerlLIO_close(p[that]);
2013 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2015 (void)SvUPGRADE(sv,SVt_IV);
2017 PL_forkprocess = pid;
2018 if (did_pipes && pid > 0) {
2022 while (n < sizeof(int)) {
2023 n1 = PerlLIO_read(pp[0],
2024 (void*)(((char*)&errkid)+n),
2030 PerlLIO_close(pp[0]);
2032 if (n) { /* Error */
2034 PerlLIO_close(p[This]);
2035 if (n != sizeof(int))
2036 Perl_croak(aTHX_ "panic: kid popen errno read");
2038 pid2 = wait4pid(pid, &status, 0);
2039 } while (pid2 == -1 && errno == EINTR);
2040 errno = errkid; /* Propagate errno from kid */
2045 PerlLIO_close(pp[0]);
2046 return PerlIO_fdopen(p[This], mode);
2049 #if defined(atarist) || defined(EPOC)
2052 Perl_my_popen(pTHX_ char *cmd, char *mode)
2054 PERL_FLUSHALL_FOR_CHILD;
2055 /* Call system's popen() to get a FILE *, then import it.
2056 used 0 for 2nd parameter to PerlIO_importFILE;
2059 return PerlIO_importFILE(popen(cmd, mode), 0);
2063 FILE *djgpp_popen();
2065 Perl_my_popen(pTHX_ char *cmd, char *mode)
2067 PERL_FLUSHALL_FOR_CHILD;
2068 /* Call system's popen() to get a FILE *, then import it.
2069 used 0 for 2nd parameter to PerlIO_importFILE;
2072 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2077 #endif /* !DOSISH */
2079 /* this is called in parent before the fork() */
2081 Perl_atfork_lock(void)
2083 #if defined(USE_ITHREADS)
2084 /* locks must be held in locking order (if any) */
2086 MUTEX_LOCK(&PL_malloc_mutex);
2092 /* this is called in both parent and child after the fork() */
2094 Perl_atfork_unlock(void)
2096 #if defined(USE_ITHREADS)
2097 /* locks must be released in same order as in atfork_lock() */
2099 MUTEX_UNLOCK(&PL_malloc_mutex);
2108 #if defined(HAS_FORK)
2110 #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
2115 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2116 * handlers elsewhere in the code */
2121 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2122 Perl_croak_nocontext("fork() not available");
2124 #endif /* HAS_FORK */
2129 Perl_dump_fds(pTHX_ char *s)
2134 PerlIO_printf(Perl_debug_log,"%s", s);
2135 for (fd = 0; fd < 32; fd++) {
2136 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
2137 PerlIO_printf(Perl_debug_log," %d",fd);
2139 PerlIO_printf(Perl_debug_log,"\n");
2141 #endif /* DUMP_FDS */
2145 dup2(int oldfd, int newfd)
2147 #if defined(HAS_FCNTL) && defined(F_DUPFD)
2150 PerlLIO_close(newfd);
2151 return fcntl(oldfd, F_DUPFD, newfd);
2153 #define DUP2_MAX_FDS 256
2154 int fdtmp[DUP2_MAX_FDS];
2160 PerlLIO_close(newfd);
2161 /* good enough for low fd's... */
2162 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
2163 if (fdx >= DUP2_MAX_FDS) {
2171 PerlLIO_close(fdtmp[--fdx]);
2178 #ifdef HAS_SIGACTION
2180 #ifdef MACOS_TRADITIONAL
2181 /* We don't want restart behavior on MacOS */
2186 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2188 struct sigaction act, oact;
2191 /* only "parent" interpreter can diddle signals */
2192 if (PL_curinterp != aTHX)
2196 act.sa_handler = handler;
2197 sigemptyset(&act.sa_mask);
2200 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2201 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2204 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2205 act.sa_flags |= SA_NOCLDWAIT;
2207 if (sigaction(signo, &act, &oact) == -1)
2210 return oact.sa_handler;
2214 Perl_rsignal_state(pTHX_ int signo)
2216 struct sigaction oact;
2218 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2221 return oact.sa_handler;
2225 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2227 struct sigaction act;
2230 /* only "parent" interpreter can diddle signals */
2231 if (PL_curinterp != aTHX)
2235 act.sa_handler = handler;
2236 sigemptyset(&act.sa_mask);
2239 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2240 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2243 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2244 act.sa_flags |= SA_NOCLDWAIT;
2246 return sigaction(signo, &act, save);
2250 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2253 /* only "parent" interpreter can diddle signals */
2254 if (PL_curinterp != aTHX)
2258 return sigaction(signo, save, (struct sigaction *)NULL);
2261 #else /* !HAS_SIGACTION */
2264 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2266 #if defined(USE_ITHREADS) && !defined(WIN32)
2267 /* only "parent" interpreter can diddle signals */
2268 if (PL_curinterp != aTHX)
2272 return PerlProc_signal(signo, handler);
2275 static int sig_trapped; /* XXX signals are process-wide anyway, so we
2276 ignore the implications of this for threading */
2286 Perl_rsignal_state(pTHX_ int signo)
2288 Sighandler_t oldsig;
2290 #if defined(USE_ITHREADS) && !defined(WIN32)
2291 /* only "parent" interpreter can diddle signals */
2292 if (PL_curinterp != aTHX)
2297 oldsig = PerlProc_signal(signo, sig_trap);
2298 PerlProc_signal(signo, oldsig);
2300 PerlProc_kill(PerlProc_getpid(), signo);
2305 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2307 #if defined(USE_ITHREADS) && !defined(WIN32)
2308 /* only "parent" interpreter can diddle signals */
2309 if (PL_curinterp != aTHX)
2312 *save = PerlProc_signal(signo, handler);
2313 return (*save == SIG_ERR) ? -1 : 0;
2317 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2319 #if defined(USE_ITHREADS) && !defined(WIN32)
2320 /* only "parent" interpreter can diddle signals */
2321 if (PL_curinterp != aTHX)
2324 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
2327 #endif /* !HAS_SIGACTION */
2328 #endif /* !PERL_MICRO */
2330 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
2331 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
2333 Perl_my_pclose(pTHX_ PerlIO *ptr)
2335 Sigsave_t hstat, istat, qstat;
2341 int saved_errno = 0;
2343 int saved_vaxc_errno;
2346 int saved_win32_errno;
2350 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
2352 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
2354 *svp = &PL_sv_undef;
2356 if (pid == -1) { /* Opened by popen. */
2357 return my_syspclose(ptr);
2360 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2361 saved_errno = errno;
2363 saved_vaxc_errno = vaxc$errno;
2366 saved_win32_errno = GetLastError();
2370 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
2373 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2374 rsignal_save(SIGINT, SIG_IGN, &istat);
2375 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
2378 pid2 = wait4pid(pid, &status, 0);
2379 } while (pid2 == -1 && errno == EINTR);
2381 rsignal_restore(SIGHUP, &hstat);
2382 rsignal_restore(SIGINT, &istat);
2383 rsignal_restore(SIGQUIT, &qstat);
2386 SETERRNO(saved_errno, saved_vaxc_errno);
2389 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
2391 #endif /* !DOSISH */
2393 #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
2395 Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
2400 #if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2404 char spid[TYPE_CHARS(int)];
2407 sprintf(spid, "%"IVdf, (IV)pid);
2408 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2409 if (svp && *svp != &PL_sv_undef) {
2410 *statusp = SvIVX(*svp);
2411 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2418 hv_iterinit(PL_pidstatus);
2419 if ((entry = hv_iternext(PL_pidstatus))) {
2421 char spid[TYPE_CHARS(int)];
2423 pid = atoi(hv_iterkey(entry,(I32*)statusp));
2424 sv = hv_iterval(PL_pidstatus,entry);
2425 *statusp = SvIVX(sv);
2426 sprintf(spid, "%"IVdf, (IV)pid);
2427 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
2434 # ifdef HAS_WAITPID_RUNTIME
2435 if (!HAS_WAITPID_RUNTIME)
2438 result = PerlProc_waitpid(pid,statusp,flags);
2441 #if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
2442 result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
2445 #if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2449 Perl_croak(aTHX_ "Can't do waitpid with flags");
2451 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
2452 pidgone(result,*statusp);
2459 if (result < 0 && errno == EINTR) {
2464 #endif /* !DOSISH || OS2 || WIN32 || NETWARE */
2468 Perl_pidgone(pTHX_ Pid_t pid, int status)
2471 char spid[TYPE_CHARS(int)];
2473 sprintf(spid, "%"IVdf, (IV)pid);
2474 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
2475 (void)SvUPGRADE(sv,SVt_IV);
2480 #if defined(atarist) || defined(OS2) || defined(EPOC)
2483 int /* Cannot prototype with I32
2485 my_syspclose(PerlIO *ptr)
2488 Perl_my_pclose(pTHX_ PerlIO *ptr)
2491 /* Needs work for PerlIO ! */
2492 FILE *f = PerlIO_findFILE(ptr);
2493 I32 result = pclose(f);
2494 PerlIO_releaseFILE(ptr,f);
2502 Perl_my_pclose(pTHX_ PerlIO *ptr)
2504 /* Needs work for PerlIO ! */
2505 FILE *f = PerlIO_findFILE(ptr);
2506 I32 result = djgpp_pclose(f);
2507 result = (result << 8) & 0xff00;
2508 PerlIO_releaseFILE(ptr,f);
2514 Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
2517 register const char *frombase = from;
2520 register const char c = *from;
2525 while (count-- > 0) {
2526 for (todo = len; todo > 0; todo--) {
2535 Perl_same_dirent(pTHX_ char *a, char *b)
2537 char *fa = strrchr(a,'/');
2538 char *fb = strrchr(b,'/');
2541 SV *tmpsv = sv_newmortal();
2554 sv_setpv(tmpsv, ".");
2556 sv_setpvn(tmpsv, a, fa - a);
2557 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
2560 sv_setpv(tmpsv, ".");
2562 sv_setpvn(tmpsv, b, fb - b);
2563 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
2565 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2566 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2568 #endif /* !HAS_RENAME */
2571 Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
2573 char *xfound = Nullch;
2574 char *xfailed = Nullch;
2575 char tmpbuf[MAXPATHLEN];
2579 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2580 # define SEARCH_EXTS ".bat", ".cmd", NULL
2581 # define MAX_EXT_LEN 4
2584 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2585 # define MAX_EXT_LEN 4
2588 # define SEARCH_EXTS ".pl", ".com", NULL
2589 # define MAX_EXT_LEN 4
2591 /* additional extensions to try in each dir if scriptname not found */
2593 char *exts[] = { SEARCH_EXTS };
2594 char **ext = search_ext ? search_ext : exts;
2595 int extidx = 0, i = 0;
2596 char *curext = Nullch;
2598 # define MAX_EXT_LEN 0
2602 * If dosearch is true and if scriptname does not contain path
2603 * delimiters, search the PATH for scriptname.
2605 * If SEARCH_EXTS is also defined, will look for each
2606 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2607 * while searching the PATH.
2609 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2610 * proceeds as follows:
2611 * If DOSISH or VMSISH:
2612 * + look for ./scriptname{,.foo,.bar}
2613 * + search the PATH for scriptname{,.foo,.bar}
2616 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2617 * this will not look in '.' if it's not in the PATH)
2622 # ifdef ALWAYS_DEFTYPES
2623 len = strlen(scriptname);
2624 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2625 int hasdir, idx = 0, deftypes = 1;
2628 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2631 int hasdir, idx = 0, deftypes = 1;
2634 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2636 /* The first time through, just add SEARCH_EXTS to whatever we
2637 * already have, so we can check for default file types. */
2639 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
2645 if ((strlen(tmpbuf) + strlen(scriptname)
2646 + MAX_EXT_LEN) >= sizeof tmpbuf)
2647 continue; /* don't search dir with too-long name */
2648 strcat(tmpbuf, scriptname);
2652 if (strEQ(scriptname, "-"))
2654 if (dosearch) { /* Look in '.' first. */
2655 char *cur = scriptname;
2657 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2659 if (strEQ(ext[i++],curext)) {
2660 extidx = -1; /* already has an ext */
2665 DEBUG_p(PerlIO_printf(Perl_debug_log,
2666 "Looking for %s\n",cur));
2667 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2668 && !S_ISDIR(PL_statbuf.st_mode)) {
2676 if (cur == scriptname) {
2677 len = strlen(scriptname);
2678 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
2680 cur = strcpy(tmpbuf, scriptname);
2682 } while (extidx >= 0 && ext[extidx] /* try an extension? */
2683 && strcpy(tmpbuf+len, ext[extidx++]));
2688 #ifdef MACOS_TRADITIONAL
2689 if (dosearch && !strchr(scriptname, ':') &&
2690 (s = PerlEnv_getenv("Commands")))
2692 if (dosearch && !strchr(scriptname, '/')
2694 && !strchr(scriptname, '\\')
2696 && (s = PerlEnv_getenv("PATH")))
2701 PL_bufend = s + strlen(s);
2702 while (s < PL_bufend) {
2703 #ifdef MACOS_TRADITIONAL
2704 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2708 #if defined(atarist) || defined(DOSISH)
2713 && *s != ';'; len++, s++) {
2714 if (len < sizeof tmpbuf)
2717 if (len < sizeof tmpbuf)
2719 #else /* ! (atarist || DOSISH) */
2720 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2723 #endif /* ! (atarist || DOSISH) */
2724 #endif /* MACOS_TRADITIONAL */
2727 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
2728 continue; /* don't search dir with too-long name */
2729 #ifdef MACOS_TRADITIONAL
2730 if (len && tmpbuf[len - 1] != ':')
2731 tmpbuf[len++] = ':';
2734 #if defined(atarist) || defined(__MINT__) || defined(DOSISH)
2735 && tmpbuf[len - 1] != '/'
2736 && tmpbuf[len - 1] != '\\'
2739 tmpbuf[len++] = '/';
2740 if (len == 2 && tmpbuf[0] == '.')
2743 (void)strcpy(tmpbuf + len, scriptname);
2747 len = strlen(tmpbuf);
2748 if (extidx > 0) /* reset after previous loop */
2752 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
2753 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
2754 if (S_ISDIR(PL_statbuf.st_mode)) {
2758 } while ( retval < 0 /* not there */
2759 && extidx>=0 && ext[extidx] /* try an extension? */
2760 && strcpy(tmpbuf+len, ext[extidx++])
2765 if (S_ISREG(PL_statbuf.st_mode)
2766 && cando(S_IRUSR,TRUE,&PL_statbuf)
2767 #if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
2768 && cando(S_IXUSR,TRUE,&PL_statbuf)
2772 xfound = tmpbuf; /* bingo! */
2776 xfailed = savepv(tmpbuf);
2779 if (!xfound && !seen_dot && !xfailed &&
2780 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
2781 || S_ISDIR(PL_statbuf.st_mode)))
2783 seen_dot = 1; /* Disable message. */
2785 if (flags & 1) { /* do or die? */
2786 Perl_croak(aTHX_ "Can't %s %s%s%s",
2787 (xfailed ? "execute" : "find"),
2788 (xfailed ? xfailed : scriptname),
2789 (xfailed ? "" : " on PATH"),
2790 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2792 scriptname = Nullch;
2796 scriptname = xfound;
2798 return (scriptname ? savepv(scriptname) : Nullch);
2801 #ifndef PERL_GET_CONTEXT_DEFINED
2804 Perl_get_context(void)
2806 #if defined(USE_ITHREADS)
2807 # ifdef OLD_PTHREADS_API
2809 if (pthread_getspecific(PL_thr_key, &t))
2810 Perl_croak_nocontext("panic: pthread_getspecific");
2813 # ifdef I_MACH_CTHREADS
2814 return (void*)cthread_data(cthread_self());
2816 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
2825 Perl_set_context(void *t)
2827 #if defined(USE_ITHREADS)
2828 # ifdef I_MACH_CTHREADS
2829 cthread_set_data(cthread_self(), t);
2831 if (pthread_setspecific(PL_thr_key, t))
2832 Perl_croak_nocontext("panic: pthread_setspecific");
2837 #endif /* !PERL_GET_CONTEXT_DEFINED */
2839 #ifdef PERL_GLOBAL_STRUCT
2848 Perl_get_op_names(pTHX)
2854 Perl_get_op_descs(pTHX)
2860 Perl_get_no_modify(pTHX)
2862 return (char*)PL_no_modify;
2866 Perl_get_opargs(pTHX)
2872 Perl_get_ppaddr(pTHX)
2874 return (PPADDR_t*)PL_ppaddr;
2877 #ifndef HAS_GETENV_LEN
2879 Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
2881 char *env_trans = PerlEnv_getenv(env_elem);
2883 *len = strlen(env_trans);
2890 Perl_get_vtbl(pTHX_ int vtbl_id)
2892 MGVTBL* result = Null(MGVTBL*);
2896 result = &PL_vtbl_sv;
2899 result = &PL_vtbl_env;
2901 case want_vtbl_envelem:
2902 result = &PL_vtbl_envelem;
2905 result = &PL_vtbl_sig;
2907 case want_vtbl_sigelem:
2908 result = &PL_vtbl_sigelem;
2910 case want_vtbl_pack:
2911 result = &PL_vtbl_pack;
2913 case want_vtbl_packelem:
2914 result = &PL_vtbl_packelem;
2916 case want_vtbl_dbline:
2917 result = &PL_vtbl_dbline;
2920 result = &PL_vtbl_isa;
2922 case want_vtbl_isaelem:
2923 result = &PL_vtbl_isaelem;
2925 case want_vtbl_arylen:
2926 result = &PL_vtbl_arylen;
2928 case want_vtbl_glob:
2929 result = &PL_vtbl_glob;
2931 case want_vtbl_mglob:
2932 result = &PL_vtbl_mglob;
2934 case want_vtbl_nkeys:
2935 result = &PL_vtbl_nkeys;
2937 case want_vtbl_taint:
2938 result = &PL_vtbl_taint;
2940 case want_vtbl_substr:
2941 result = &PL_vtbl_substr;
2944 result = &PL_vtbl_vec;
2947 result = &PL_vtbl_pos;
2950 result = &PL_vtbl_bm;
2953 result = &PL_vtbl_fm;
2955 case want_vtbl_uvar:
2956 result = &PL_vtbl_uvar;
2958 case want_vtbl_defelem:
2959 result = &PL_vtbl_defelem;
2961 case want_vtbl_regexp:
2962 result = &PL_vtbl_regexp;
2964 case want_vtbl_regdata:
2965 result = &PL_vtbl_regdata;
2967 case want_vtbl_regdatum:
2968 result = &PL_vtbl_regdatum;
2970 #ifdef USE_LOCALE_COLLATE
2971 case want_vtbl_collxfrm:
2972 result = &PL_vtbl_collxfrm;
2975 case want_vtbl_amagic:
2976 result = &PL_vtbl_amagic;
2978 case want_vtbl_amagicelem:
2979 result = &PL_vtbl_amagicelem;
2981 case want_vtbl_backref:
2982 result = &PL_vtbl_backref;
2984 case want_vtbl_utf8:
2985 result = &PL_vtbl_utf8;
2992 Perl_my_fflush_all(pTHX)
2994 #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
2995 return PerlIO_flush(NULL);
2997 # if defined(HAS__FWALK)
2998 extern int fflush(FILE *);
2999 /* undocumented, unprototyped, but very useful BSDism */
3000 extern void _fwalk(int (*)(FILE *));
3004 # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
3006 # ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3007 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3009 # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3010 open_max = sysconf(_SC_OPEN_MAX);
3013 open_max = FOPEN_MAX;
3016 open_max = OPEN_MAX;
3027 for (i = 0; i < open_max; i++)
3028 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3029 STDIO_STREAM_ARRAY[i]._file < open_max &&
3030 STDIO_STREAM_ARRAY[i]._flag)
3031 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
3035 SETERRNO(EBADF,RMS_IFI);
3042 Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op)
3045 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3046 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3048 char *pars = OP_IS_FILETEST(op) ? "" : "()";
3049 char *type = OP_IS_SOCKET(op)
3050 || (gv && io && IoTYPE(io) == IoTYPE_SOCKET)
3051 ? "socket" : "filehandle";
3054 if (gv && isGV(gv)) {
3058 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3059 if (ckWARN(WARN_IO)) {
3060 const char *direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out";
3062 Perl_warner(aTHX_ packWARN(WARN_IO),
3063 "Filehandle %s opened only for %sput",
3066 Perl_warner(aTHX_ packWARN(WARN_IO),
3067 "Filehandle opened only for %sput", direction);
3074 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3076 warn_type = WARN_CLOSED;
3080 warn_type = WARN_UNOPENED;
3083 if (ckWARN(warn_type)) {
3084 if (name && *name) {
3085 Perl_warner(aTHX_ packWARN(warn_type),
3086 "%s%s on %s %s %s", func, pars, vile, type, name);
3087 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3089 aTHX_ packWARN(warn_type),
3090 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3095 Perl_warner(aTHX_ packWARN(warn_type),
3096 "%s%s on %s %s", func, pars, vile, type);
3097 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3099 aTHX_ packWARN(warn_type),
3100 "\t(Are you trying to call %s%s on dirhandle?)\n",
3109 /* in ASCII order, not that it matters */
3110 static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3113 Perl_ebcdic_control(pTHX_ int ch)
3121 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3122 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3125 if (ctlp == controllablechars)
3126 return('\177'); /* DEL */
3128 return((unsigned char)(ctlp - controllablechars - 1));
3129 } else { /* Want uncontrol */
3130 if (ch == '\177' || ch == -1)
3132 else if (ch == '\157')
3134 else if (ch == '\174')
3136 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3138 else if (ch == '\155')
3140 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3141 return(controllablechars[ch+1]);
3143 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3148 /* To workaround core dumps from the uninitialised tm_zone we get the
3149 * system to give us a reasonable struct to copy. This fix means that
3150 * strftime uses the tm_zone and tm_gmtoff values returned by
3151 * localtime(time()). That should give the desired result most of the
3152 * time. But probably not always!
3154 * This does not address tzname aspects of NETaa14816.
3159 # ifndef STRUCT_TM_HASZONE
3160 # define STRUCT_TM_HASZONE
3164 #ifdef STRUCT_TM_HASZONE /* Backward compat */
3165 # ifndef HAS_TM_TM_ZONE
3166 # define HAS_TM_TM_ZONE
3171 Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
3173 #ifdef HAS_TM_TM_ZONE
3176 Copy(localtime(&now), ptm, 1, struct tm);
3181 * mini_mktime - normalise struct tm values without the localtime()
3182 * semantics (and overhead) of mktime().
3185 Perl_mini_mktime(pTHX_ struct tm *ptm)
3189 int month, mday, year, jday;
3190 int odd_cent, odd_year;
3192 #define DAYS_PER_YEAR 365
3193 #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3194 #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3195 #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3196 #define SECS_PER_HOUR (60*60)
3197 #define SECS_PER_DAY (24*SECS_PER_HOUR)
3198 /* parentheses deliberately absent on these two, otherwise they don't work */
3199 #define MONTH_TO_DAYS 153/5
3200 #define DAYS_TO_MONTH 5/153
3201 /* offset to bias by March (month 4) 1st between month/mday & year finding */
3202 #define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3203 /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3204 #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3207 * Year/day algorithm notes:
3209 * With a suitable offset for numeric value of the month, one can find
3210 * an offset into the year by considering months to have 30.6 (153/5) days,
3211 * using integer arithmetic (i.e., with truncation). To avoid too much
3212 * messing about with leap days, we consider January and February to be
3213 * the 13th and 14th month of the previous year. After that transformation,
3214 * we need the month index we use to be high by 1 from 'normal human' usage,
3215 * so the month index values we use run from 4 through 15.
3217 * Given that, and the rules for the Gregorian calendar (leap years are those
3218 * divisible by 4 unless also divisible by 100, when they must be divisible
3219 * by 400 instead), we can simply calculate the number of days since some
3220 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3221 * the days we derive from our month index, and adding in the day of the
3222 * month. The value used here is not adjusted for the actual origin which
3223 * it normally would use (1 January A.D. 1), since we're not exposing it.
3224 * We're only building the value so we can turn around and get the
3225 * normalised values for the year, month, day-of-month, and day-of-year.
3227 * For going backward, we need to bias the value we're using so that we find
3228 * the right year value. (Basically, we don't want the contribution of
3229 * March 1st to the number to apply while deriving the year). Having done
3230 * that, we 'count up' the contribution to the year number by accounting for
3231 * full quadracenturies (400-year periods) with their extra leap days, plus
3232 * the contribution from full centuries (to avoid counting in the lost leap
3233 * days), plus the contribution from full quad-years (to count in the normal
3234 * leap days), plus the leftover contribution from any non-leap years.
3235 * At this point, if we were working with an actual leap day, we'll have 0
3236 * days left over. This is also true for March 1st, however. So, we have
3237 * to special-case that result, and (earlier) keep track of the 'odd'
3238 * century and year contributions. If we got 4 extra centuries in a qcent,
3239 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3240 * Otherwise, we add back in the earlier bias we removed (the 123 from
3241 * figuring in March 1st), find the month index (integer division by 30.6),
3242 * and the remainder is the day-of-month. We then have to convert back to
3243 * 'real' months (including fixing January and February from being 14/15 in
3244 * the previous year to being in the proper year). After that, to get
3245 * tm_yday, we work with the normalised year and get a new yearday value for
3246 * January 1st, which we subtract from the yearday value we had earlier,
3247 * representing the date we've re-built. This is done from January 1
3248 * because tm_yday is 0-origin.
3250 * Since POSIX time routines are only guaranteed to work for times since the
3251 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3252 * applies Gregorian calendar rules even to dates before the 16th century
3253 * doesn't bother me. Besides, you'd need cultural context for a given
3254 * date to know whether it was Julian or Gregorian calendar, and that's
3255 * outside the scope for this routine. Since we convert back based on the
3256 * same rules we used to build the yearday, you'll only get strange results
3257 * for input which needed normalising, or for the 'odd' century years which
3258 * were leap years in the Julian calander but not in the Gregorian one.
3259 * I can live with that.
3261 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3262 * that's still outside the scope for POSIX time manipulation, so I don't
3266 year = 1900 + ptm->tm_year;
3267 month = ptm->tm_mon;
3268 mday = ptm->tm_mday;
3269 /* allow given yday with no month & mday to dominate the result */
3270 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3273 jday = 1 + ptm->tm_yday;
3282 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3283 yearday += month*MONTH_TO_DAYS + mday + jday;
3285 * Note that we don't know when leap-seconds were or will be,
3286 * so we have to trust the user if we get something which looks
3287 * like a sensible leap-second. Wild values for seconds will
3288 * be rationalised, however.
3290 if ((unsigned) ptm->tm_sec <= 60) {
3297 secs += 60 * ptm->tm_min;
3298 secs += SECS_PER_HOUR * ptm->tm_hour;
3300 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3301 /* got negative remainder, but need positive time */
3302 /* back off an extra day to compensate */
3303 yearday += (secs/SECS_PER_DAY)-1;
3304 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3307 yearday += (secs/SECS_PER_DAY);
3308 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3311 else if (secs >= SECS_PER_DAY) {
3312 yearday += (secs/SECS_PER_DAY);
3313 secs %= SECS_PER_DAY;
3315 ptm->tm_hour = secs/SECS_PER_HOUR;
3316 secs %= SECS_PER_HOUR;
3317 ptm->tm_min = secs/60;
3319 ptm->tm_sec += secs;
3320 /* done with time of day effects */
3322 * The algorithm for yearday has (so far) left it high by 428.
3323 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3324 * bias it by 123 while trying to figure out what year it
3325 * really represents. Even with this tweak, the reverse
3326 * translation fails for years before A.D. 0001.
3327 * It would still fail for Feb 29, but we catch that one below.
3329 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3330 yearday -= YEAR_ADJUST;
3331 year = (yearday / DAYS_PER_QCENT) * 400;
3332 yearday %= DAYS_PER_QCENT;
3333 odd_cent = yearday / DAYS_PER_CENT;
3334 year += odd_cent * 100;
3335 yearday %= DAYS_PER_CENT;
3336 year += (yearday / DAYS_PER_QYEAR) * 4;
3337 yearday %= DAYS_PER_QYEAR;
3338 odd_year = yearday / DAYS_PER_YEAR;
3340 yearday %= DAYS_PER_YEAR;
3341 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3346 yearday += YEAR_ADJUST; /* recover March 1st crock */
3347 month = yearday*DAYS_TO_MONTH;
3348 yearday -= month*MONTH_TO_DAYS;
3349 /* recover other leap-year adjustment */
3358 ptm->tm_year = year - 1900;
3360 ptm->tm_mday = yearday;
3361 ptm->tm_mon = month;
3365 ptm->tm_mon = month - 1;
3367 /* re-build yearday based on Jan 1 to get tm_yday */
3369 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3370 yearday += 14*MONTH_TO_DAYS + 1;
3371 ptm->tm_yday = jday - yearday;
3372 /* fix tm_wday if not overridden by caller */
3373 if ((unsigned)ptm->tm_wday > 6)
3374 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3378 Perl_my_strftime(pTHX_ char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
3386 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3389 mytm.tm_hour = hour;
3390 mytm.tm_mday = mday;
3392 mytm.tm_year = year;
3393 mytm.tm_wday = wday;
3394 mytm.tm_yday = yday;
3395 mytm.tm_isdst = isdst;
3397 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3398 #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3403 #ifdef HAS_TM_TM_GMTOFF
3404 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3406 #ifdef HAS_TM_TM_ZONE
3407 mytm.tm_zone = mytm2.tm_zone;
3412 New(0, buf, buflen, char);
3413 len = strftime(buf, buflen, fmt, &mytm);
3415 ** The following is needed to handle to the situation where
3416 ** tmpbuf overflows. Basically we want to allocate a buffer
3417 ** and try repeatedly. The reason why it is so complicated
3418 ** is that getting a return value of 0 from strftime can indicate
3419 ** one of the following:
3420 ** 1. buffer overflowed,
3421 ** 2. illegal conversion specifier, or
3422 ** 3. the format string specifies nothing to be returned(not
3423 ** an error). This could be because format is an empty string
3424 ** or it specifies %p that yields an empty string in some locale.
3425 ** If there is a better way to make it portable, go ahead by
3428 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3431 /* Possibly buf overflowed - try again with a bigger buf */
3432 int fmtlen = strlen(fmt);
3433 int bufsize = fmtlen + buflen;
3435 New(0, buf, bufsize, char);
3437 buflen = strftime(buf, bufsize, fmt, &mytm);
3438 if (buflen > 0 && buflen < bufsize)
3440 /* heuristic to prevent out-of-memory errors */
3441 if (bufsize > 100*fmtlen) {
3447 Renew(buf, bufsize, char);
3452 Perl_croak(aTHX_ "panic: no strftime");
3457 #define SV_CWD_RETURN_UNDEF \
3458 sv_setsv(sv, &PL_sv_undef); \
3461 #define SV_CWD_ISDOT(dp) \
3462 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3463 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
3466 =head1 Miscellaneous Functions
3468 =for apidoc getcwd_sv
3470 Fill the sv with current working directory
3475 /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3476 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3477 * getcwd(3) if available
3478 * Comments from the orignal:
3479 * This is a faster version of getcwd. It's also more dangerous
3480 * because you might chdir out of a directory that you can't chdir
3484 Perl_getcwd_sv(pTHX_ register SV *sv)
3488 #ifndef INCOMPLETE_TAINTS
3494 char buf[MAXPATHLEN];
3496 /* Some getcwd()s automatically allocate a buffer of the given
3497 * size from the heap if they are given a NULL buffer pointer.
3498 * The problem is that this behaviour is not portable. */
3499 if (getcwd(buf, sizeof(buf) - 1)) {
3500 STRLEN len = strlen(buf);
3501 sv_setpvn(sv, buf, len);
3505 sv_setsv(sv, &PL_sv_undef);
3513 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
3514 int namelen, pathlen=0;
3518 (void)SvUPGRADE(sv, SVt_PV);
3520 if (PerlLIO_lstat(".", &statbuf) < 0) {
3521 SV_CWD_RETURN_UNDEF;
3524 orig_cdev = statbuf.st_dev;
3525 orig_cino = statbuf.st_ino;
3533 if (PerlDir_chdir("..") < 0) {
3534 SV_CWD_RETURN_UNDEF;
3536 if (PerlLIO_stat(".", &statbuf) < 0) {
3537 SV_CWD_RETURN_UNDEF;
3540 cdev = statbuf.st_dev;
3541 cino = statbuf.st_ino;
3543 if (odev == cdev && oino == cino) {
3546 if (!(dir = PerlDir_open("."))) {
3547 SV_CWD_RETURN_UNDEF;
3550 while ((dp = PerlDir_read(dir)) != NULL) {
3552 namelen = dp->d_namlen;
3554 namelen = strlen(dp->d_name);
3557 if (SV_CWD_ISDOT(dp)) {
3561 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
3562 SV_CWD_RETURN_UNDEF;
3565 tdev = statbuf.st_dev;
3566 tino = statbuf.st_ino;
3567 if (tino == oino && tdev == odev) {
3573 SV_CWD_RETURN_UNDEF;
3576 if (pathlen + namelen + 1 >= MAXPATHLEN) {
3577 SV_CWD_RETURN_UNDEF;
3580 SvGROW(sv, pathlen + namelen + 1);
3584 Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char);
3587 /* prepend current directory to the front */
3589 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
3590 pathlen += (namelen + 1);
3592 #ifdef VOID_CLOSEDIR
3595 if (PerlDir_close(dir) < 0) {
3596 SV_CWD_RETURN_UNDEF;
3602 SvCUR_set(sv, pathlen);
3606 if (PerlDir_chdir(SvPVX(sv)) < 0) {
3607 SV_CWD_RETURN_UNDEF;
3610 if (PerlLIO_stat(".", &statbuf) < 0) {
3611 SV_CWD_RETURN_UNDEF;
3614 cdev = statbuf.st_dev;
3615 cino = statbuf.st_ino;
3617 if (cdev != orig_cdev || cino != orig_cino) {
3618 Perl_croak(aTHX_ "Unstable directory path, "
3619 "current directory changed unexpectedly");
3631 =head1 SV Manipulation Functions
3633 =for apidoc scan_vstring
3635 Returns a pointer to the next character after the parsed
3636 vstring, as well as updating the passed in sv.
3638 Function must be called like
3641 s = scan_vstring(s,sv);
3643 The sv should already be large enough to store the vstring
3644 passed in, for performance reasons.
3650 Perl_scan_vstring(pTHX_ char *s, SV *sv)
3654 if (*pos == 'v') pos++; /* get past 'v' */
3655 while (isDIGIT(*pos) || *pos == '_')
3657 if (!isALPHA(*pos)) {
3659 U8 tmpbuf[UTF8_MAXLEN+1];
3662 if (*s == 'v') s++; /* get past 'v' */
3664 sv_setpvn(sv, "", 0);
3669 /* this is atoi() that tolerates underscores */
3672 while (--end >= s) {
3677 rev += (*end - '0') * mult;
3679 if (orev > rev && ckWARN_d(WARN_OVERFLOW))
3680 Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
3681 "Integer overflow in decimal number");
3685 if (rev > 0x7FFFFFFF)
3686 Perl_croak(aTHX_ "In EBCDIC the v-string components cannot exceed 2147483647");
3688 /* Append native character for the rev point */
3689 tmpend = uvchr_to_utf8(tmpbuf, rev);
3690 sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
3691 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev)))
3693 if (*pos == '.' && isDIGIT(pos[1]))
3699 while (isDIGIT(*pos) || *pos == '_')
3703 sv_magic(sv,NULL,PERL_MAGIC_vstring,(const char*)start, pos-start);
3710 =for apidoc scan_version
3712 Returns a pointer to the next character after the parsed
3713 version string, as well as upgrading the passed in SV to
3716 Function must be called with an already existing SV like
3719 s = scan_version(s,sv);
3721 Performs some preprocessing to the string to ensure that
3722 it has the correct characteristics of a version. Flags the
3723 object if it contains an underscore (which denotes this
3730 Perl_scan_version(pTHX_ char *s, SV *rv)
3732 const char *start = s;
3736 SV* sv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
3737 (void)sv_upgrade(sv, SVt_PVAV); /* needs to be an AV type */
3739 /* pre-scan the imput string to check for decimals */
3740 while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) )
3745 Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
3748 else if ( *pos == '_' )
3751 Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
3758 if (*pos == 'v') pos++; /* get past 'v' */
3759 while (isDIGIT(*pos))
3761 if (!isALPHA(*pos)) {
3764 if (*s == 'v') s++; /* get past 'v' */
3769 /* this is atoi() that delimits on underscores */
3773 if ( s < pos && s > start && *(s-1) == '_' ) {
3774 mult *= -1; /* beta version */
3776 /* the following if() will only be true after the decimal
3777 * point of a version originally created with a bare
3778 * floating point number, i.e. not quoted in any way
3780 if ( s > start+1 && saw_period == 1 && !saw_under ) {
3784 rev += (*s - '0') * mult;
3786 if ( PERL_ABS(orev) > PERL_ABS(rev) )
3787 Perl_croak(aTHX_ "Integer overflow in version");
3792 while (--end >= s) {
3794 rev += (*end - '0') * mult;
3796 if ( PERL_ABS(orev) > PERL_ABS(rev) )
3797 Perl_croak(aTHX_ "Integer overflow in version");
3802 /* Append revision */
3803 av_push((AV *)sv, newSViv(rev));
3804 if ( (*pos == '.' || *pos == '_') && isDIGIT(pos[1]))
3806 else if ( isDIGIT(*pos) )
3812 while ( isDIGIT(*pos) ) {
3813 if ( !saw_under && saw_period == 1 && pos-s == 3 )
3823 =for apidoc new_version
3825 Returns a new version object based on the passed in SV:
3827 SV *sv = new_version(SV *ver);
3829 Does not alter the passed in ver SV. See "upg_version" if you
3830 want to upgrade the SV.
3836 Perl_new_version(pTHX_ SV *ver)
3840 if ( SvNOK(ver) ) /* may get too much accuracy */
3843 sprintf(tbuf,"%.9"NVgf, SvNVX(ver));
3844 version = savepv(tbuf);
3847 else if ( SvVOK(ver) ) { /* already a v-string */
3848 MAGIC* mg = mg_find(ver,PERL_MAGIC_vstring);
3849 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
3852 else /* must be a string or something like a string */
3854 version = (char *)SvPV(ver,PL_na);
3856 version = scan_version(version,rv);
3861 =for apidoc upg_version
3863 In-place upgrade of the supplied SV to a version object.
3865 SV *sv = upg_version(SV *sv);
3867 Returns a pointer to the upgraded SV.
3873 Perl_upg_version(pTHX_ SV *ver)
3875 char *version = savepvn(SvPVX(ver),SvCUR(ver));
3877 if ( SvVOK(ver) ) { /* already a v-string */
3878 MAGIC* mg = mg_find(ver,PERL_MAGIC_vstring);
3879 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
3882 version = scan_version(version,ver);
3890 Accepts a version object and returns the normalized floating
3891 point representation. Call like:
3895 NOTE: you can pass either the object directly or the SV
3896 contained within the RV.
3902 Perl_vnumify(pTHX_ SV *vs)
3905 SV *sv = NEWSV(92,0);
3908 len = av_len((AV *)vs);
3911 Perl_sv_catpv(aTHX_ sv,"0");
3914 digit = SvIVX(*av_fetch((AV *)vs, 0, 0));
3915 Perl_sv_setpvf(aTHX_ sv,"%d.", PERL_ABS(digit));
3916 for ( i = 1 ; i <= len ; i++ )
3918 digit = SvIVX(*av_fetch((AV *)vs, i, 0));
3919 Perl_sv_catpvf(aTHX_ sv,"%03d", PERL_ABS(digit));
3922 Perl_sv_catpv(aTHX_ sv,"000");
3923 sv_setnv(sv, SvNV(sv));
3928 =for apidoc vstringify
3930 Accepts a version object and returns the normalized string
3931 representation. Call like:
3933 sv = vstringify(rv);
3935 NOTE: you can pass either the object directly or the SV
3936 contained within the RV.
3942 Perl_vstringify(pTHX_ SV *vs)
3945 SV *sv = NEWSV(92,0);
3948 len = av_len((AV *)vs);
3951 Perl_sv_catpv(aTHX_ sv,"");
3954 digit = SvIVX(*av_fetch((AV *)vs, 0, 0));
3955 Perl_sv_setpvf(aTHX_ sv,"%"IVdf,(IV)digit);
3956 for ( i = 1 ; i <= len ; i++ )
3958 digit = SvIVX(*av_fetch((AV *)vs, i, 0));
3960 Perl_sv_catpvf(aTHX_ sv,"_%"IVdf,(IV)-digit);
3962 Perl_sv_catpvf(aTHX_ sv,".%"IVdf,(IV)digit);
3965 Perl_sv_catpv(aTHX_ sv,".0");
3972 Version object aware cmp. Both operands must already have been
3973 converted into version objects.
3979 Perl_vcmp(pTHX_ SV *lsv, SV *rsv)
3986 l = av_len((AV *)lsv);
3987 r = av_len((AV *)rsv);
3991 while ( i <= m && retval == 0 )
3993 I32 left = SvIV(*av_fetch((AV *)lsv,i,0));
3994 I32 right = SvIV(*av_fetch((AV *)rsv,i,0));
3995 bool lbeta = left < 0 ? 1 : 0;
3996 bool rbeta = right < 0 ? 1 : 0;
3997 left = PERL_ABS(left);
3998 right = PERL_ABS(right);
3999 if ( left < right || (left == right && lbeta && !rbeta) )
4001 if ( left > right || (left == right && rbeta && !lbeta) )
4006 if ( l != r && retval == 0 ) /* possible match except for trailing 0 */
4008 if ( !( l < r && r-l == 1 && SvIV(*av_fetch((AV *)rsv,r,0)) == 0 ) &&
4009 !( l-r == 1 && SvIV(*av_fetch((AV *)lsv,l,0)) == 0 ) )
4011 retval = l < r ? -1 : +1; /* not a match after all */
4017 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
4018 # define EMULATE_SOCKETPAIR_UDP
4021 #ifdef EMULATE_SOCKETPAIR_UDP
4023 S_socketpair_udp (int fd[2]) {
4025 /* Fake a datagram socketpair using UDP to localhost. */
4026 int sockets[2] = {-1, -1};
4027 struct sockaddr_in addresses[2];
4029 Sock_size_t size = sizeof(struct sockaddr_in);
4030 unsigned short port;
4033 memset(&addresses, 0, sizeof(addresses));
4036 sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
4037 if (sockets[i] == -1)
4038 goto tidy_up_and_fail;
4040 addresses[i].sin_family = AF_INET;
4041 addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4042 addresses[i].sin_port = 0; /* kernel choses port. */
4043 if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
4044 sizeof(struct sockaddr_in)) == -1)
4045 goto tidy_up_and_fail;
4048 /* Now have 2 UDP sockets. Find out which port each is connected to, and
4049 for each connect the other socket to it. */
4052 if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
4054 goto tidy_up_and_fail;
4055 if (size != sizeof(struct sockaddr_in))
4056 goto abort_tidy_up_and_fail;
4057 /* !1 is 0, !0 is 1 */
4058 if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
4059 sizeof(struct sockaddr_in)) == -1)
4060 goto tidy_up_and_fail;
4063 /* Now we have 2 sockets connected to each other. I don't trust some other
4064 process not to have already sent a packet to us (by random) so send
4065 a packet from each to the other. */
4068 /* I'm going to send my own port number. As a short.
4069 (Who knows if someone somewhere has sin_port as a bitfield and needs
4070 this routine. (I'm assuming crays have socketpair)) */
4071 port = addresses[i].sin_port;
4072 got = PerlLIO_write(sockets[i], &port, sizeof(port));
4073 if (got != sizeof(port)) {
4075 goto tidy_up_and_fail;
4076 goto abort_tidy_up_and_fail;
4080 /* Packets sent. I don't trust them to have arrived though.
4081 (As I understand it Solaris TCP stack is multithreaded. Non-blocking
4082 connect to localhost will use a second kernel thread. In 2.6 the
4083 first thread running the connect() returns before the second completes,
4084 so EINPROGRESS> In 2.7 the improved stack is faster and connect()
4085 returns 0. Poor programs have tripped up. One poor program's authors'
4086 had a 50-1 reverse stock split. Not sure how connected these were.)
4087 So I don't trust someone not to have an unpredictable UDP stack.
4091 struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
4092 int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
4096 FD_SET(sockets[0], &rset);
4097 FD_SET(sockets[1], &rset);
4099 got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
4100 if (got != 2 || !FD_ISSET(sockets[0], &rset)
4101 || !FD_ISSET(sockets[1], &rset)) {
4102 /* I hope this is portable and appropriate. */
4104 goto tidy_up_and_fail;
4105 goto abort_tidy_up_and_fail;
4109 /* And the paranoia department even now doesn't trust it to have arrive
4110 (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
4112 struct sockaddr_in readfrom;
4113 unsigned short buffer[2];
4118 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4119 sizeof(buffer), MSG_DONTWAIT,
4120 (struct sockaddr *) &readfrom, &size);
4122 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4124 (struct sockaddr *) &readfrom, &size);
4128 goto tidy_up_and_fail;
4129 if (got != sizeof(port)
4130 || size != sizeof(struct sockaddr_in)
4131 /* Check other socket sent us its port. */
4132 || buffer[0] != (unsigned short) addresses[!i].sin_port
4133 /* Check kernel says we got the datagram from that socket */
4134 || readfrom.sin_family != addresses[!i].sin_family
4135 || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
4136 || readfrom.sin_port != addresses[!i].sin_port)
4137 goto abort_tidy_up_and_fail;
4140 /* My caller (my_socketpair) has validated that this is non-NULL */
4143 /* I hereby declare this connection open. May God bless all who cross
4147 abort_tidy_up_and_fail:
4148 errno = ECONNABORTED;
4151 int save_errno = errno;
4152 if (sockets[0] != -1)
4153 PerlLIO_close(sockets[0]);
4154 if (sockets[1] != -1)
4155 PerlLIO_close(sockets[1]);
4160 #endif /* EMULATE_SOCKETPAIR_UDP */
4162 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
4164 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4165 /* Stevens says that family must be AF_LOCAL, protocol 0.
4166 I'm going to enforce that, then ignore it, and use TCP (or UDP). */
4171 struct sockaddr_in listen_addr;
4172 struct sockaddr_in connect_addr;
4177 || family != AF_UNIX
4180 errno = EAFNOSUPPORT;
4188 #ifdef EMULATE_SOCKETPAIR_UDP
4189 if (type == SOCK_DGRAM)
4190 return S_socketpair_udp(fd);
4193 listener = PerlSock_socket(AF_INET, type, 0);
4196 memset(&listen_addr, 0, sizeof(listen_addr));
4197 listen_addr.sin_family = AF_INET;
4198 listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4199 listen_addr.sin_port = 0; /* kernel choses port. */
4200 if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
4201 sizeof(listen_addr)) == -1)
4202 goto tidy_up_and_fail;
4203 if (PerlSock_listen(listener, 1) == -1)
4204 goto tidy_up_and_fail;
4206 connector = PerlSock_socket(AF_INET, type, 0);
4207 if (connector == -1)
4208 goto tidy_up_and_fail;
4209 /* We want to find out the port number to connect to. */
4210 size = sizeof(connect_addr);
4211 if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
4213 goto tidy_up_and_fail;
4214 if (size != sizeof(connect_addr))
4215 goto abort_tidy_up_and_fail;
4216 if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
4217 sizeof(connect_addr)) == -1)
4218 goto tidy_up_and_fail;
4220 size = sizeof(listen_addr);
4221 acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
4224 goto tidy_up_and_fail;
4225 if (size != sizeof(listen_addr))
4226 goto abort_tidy_up_and_fail;
4227 PerlLIO_close(listener);
4228 /* Now check we are talking to ourself by matching port and host on the
4230 if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
4232 goto tidy_up_and_fail;
4233 if (size != sizeof(connect_addr)
4234 || listen_addr.sin_family != connect_addr.sin_family
4235 || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
4236 || listen_addr.sin_port != connect_addr.sin_port) {
4237 goto abort_tidy_up_and_fail;
4243 abort_tidy_up_and_fail:
4244 errno = ECONNABORTED; /* I hope this is portable and appropriate. */
4247 int save_errno = errno;
4249 PerlLIO_close(listener);
4250 if (connector != -1)
4251 PerlLIO_close(connector);
4253 PerlLIO_close(acceptor);
4259 /* In any case have a stub so that there's code corresponding
4260 * to the my_socketpair in global.sym. */
4262 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4263 #ifdef HAS_SOCKETPAIR
4264 return socketpair(family, type, protocol, fd);
4273 =for apidoc sv_nosharing
4275 Dummy routine which "shares" an SV when there is no sharing module present.
4276 Exists to avoid test for a NULL function pointer and because it could potentially warn under
4277 some level of strict-ness.
4283 Perl_sv_nosharing(pTHX_ SV *sv)
4288 =for apidoc sv_nolocking
4290 Dummy routine which "locks" an SV when there is no locking module present.
4291 Exists to avoid test for a NULL function pointer and because it could potentially warn under
4292 some level of strict-ness.
4298 Perl_sv_nolocking(pTHX_ SV *sv)
4304 =for apidoc sv_nounlocking
4306 Dummy routine which "unlocks" an SV when there is no locking module present.
4307 Exists to avoid test for a NULL function pointer and because it could potentially warn under
4308 some level of strict-ness.
4314 Perl_sv_nounlocking(pTHX_ SV *sv)
4319 Perl_parse_unicode_opts(pTHX_ char **popt)
4326 opt = (U32) atoi(p);
4327 while (isDIGIT(*p)) p++;
4328 if (*p && *p != '\n' && *p != '\r')
4329 Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
4334 case PERL_UNICODE_STDIN:
4335 opt |= PERL_UNICODE_STDIN_FLAG; break;
4336 case PERL_UNICODE_STDOUT:
4337 opt |= PERL_UNICODE_STDOUT_FLAG; break;
4338 case PERL_UNICODE_STDERR:
4339 opt |= PERL_UNICODE_STDERR_FLAG; break;
4340 case PERL_UNICODE_STD:
4341 opt |= PERL_UNICODE_STD_FLAG; break;
4342 case PERL_UNICODE_IN:
4343 opt |= PERL_UNICODE_IN_FLAG; break;
4344 case PERL_UNICODE_OUT:
4345 opt |= PERL_UNICODE_OUT_FLAG; break;
4346 case PERL_UNICODE_INOUT:
4347 opt |= PERL_UNICODE_INOUT_FLAG; break;
4348 case PERL_UNICODE_LOCALE:
4349 opt |= PERL_UNICODE_LOCALE_FLAG; break;
4350 case PERL_UNICODE_ARGV:
4351 opt |= PERL_UNICODE_ARGV_FLAG; break;
4353 if (*p != '\n' && *p != '\r')
4355 "Unknown Unicode option letter '%c'", *p);
4361 opt = PERL_UNICODE_DEFAULT_FLAGS;
4363 if (opt & ~PERL_UNICODE_ALL_FLAGS)
4364 Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
4365 (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));