3 * Copyright (c) 1991-2001, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
12 * come here, and I don't want to see no more magic,' he said, and fell silent."
16 =head1 Magical Functions
23 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
32 /* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
33 #if !defined(HAS_SIGACTION) && defined(VMS)
34 # define FAKE_PERSISTENT_SIGNAL_HANDLERS
36 /* if we're doing kill() with sys$sigprc on VMS, FAKE_DEFAULT_SIGNAL_HANDLERS */
37 #if defined(KILL_BY_SIGPRC)
38 # define FAKE_DEFAULT_SIGNAL_HANDLERS
41 static void restore_magic(pTHX_ void *p);
42 static void unwind_handler_stack(pTHX_ void *p);
45 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
53 /* MGS is typedef'ed to struct magic_state in perl.h */
56 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
59 assert(SvMAGICAL(sv));
61 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
63 mgs = SSPTR(mgs_ix, MGS*);
65 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
66 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
70 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
74 =for apidoc mg_magical
76 Turns on the magical status of an SV. See C<sv_magic>.
82 Perl_mg_magical(pTHX_ SV *sv)
85 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
86 MGVTBL* vtbl = mg->mg_virtual;
88 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
92 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
101 Do magic after a value is retrieved from the SV. See C<sv_magic>.
107 Perl_mg_get(pTHX_ SV *sv)
110 MAGIC *newmg, *head, *cur, *mg;
111 I32 mgs_ix = SSNEW(sizeof(MGS));
113 save_magic(mgs_ix, sv);
115 /* We must call svt_get(sv, mg) for each valid entry in the linked
116 list of magic. svt_get() may delete the current entry, add new
117 magic to the head of the list, or upgrade the SV. AMS 20010810 */
119 newmg = cur = head = mg = SvMAGIC(sv);
121 MGVTBL *vtbl = mg->mg_virtual;
123 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
124 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
125 /* Don't restore the flags for this entry if it was deleted. */
126 if (mg->mg_flags & MGf_GSKIP)
127 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
130 mg = mg->mg_moremagic;
133 /* Have we finished with the new entries we saw? Start again
134 where we left off (unless there are more new entries). */
142 /* Were any new entries added? */
143 if (!new && (newmg = SvMAGIC(sv)) != head) {
150 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
157 Do magic after a value is assigned to the SV. See C<sv_magic>.
163 Perl_mg_set(pTHX_ SV *sv)
169 mgs_ix = SSNEW(sizeof(MGS));
170 save_magic(mgs_ix, sv);
172 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
173 MGVTBL* vtbl = mg->mg_virtual;
174 nextmg = mg->mg_moremagic; /* it may delete itself */
175 if (mg->mg_flags & MGf_GSKIP) {
176 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
177 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
179 if (vtbl && vtbl->svt_set)
180 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
183 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
188 =for apidoc mg_length
190 Report on the SV's length. See C<sv_magic>.
196 Perl_mg_length(pTHX_ SV *sv)
201 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
202 MGVTBL* vtbl = mg->mg_virtual;
203 if (vtbl && vtbl->svt_len) {
206 mgs_ix = SSNEW(sizeof(MGS));
207 save_magic(mgs_ix, sv);
208 /* omit MGf_GSKIP -- not changed here */
209 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
210 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
217 U8 *s = (U8*)SvPV(sv, len);
218 len = Perl_utf8_length(aTHX_ s, s + len);
226 Perl_mg_size(pTHX_ SV *sv)
231 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
232 MGVTBL* vtbl = mg->mg_virtual;
233 if (vtbl && vtbl->svt_len) {
236 mgs_ix = SSNEW(sizeof(MGS));
237 save_magic(mgs_ix, sv);
238 /* omit MGf_GSKIP -- not changed here */
239 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
240 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
247 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
252 Perl_croak(aTHX_ "Size magic not implemented");
261 Clear something magical that the SV represents. See C<sv_magic>.
267 Perl_mg_clear(pTHX_ SV *sv)
272 mgs_ix = SSNEW(sizeof(MGS));
273 save_magic(mgs_ix, sv);
275 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
276 MGVTBL* vtbl = mg->mg_virtual;
277 /* omit GSKIP -- never set here */
279 if (vtbl && vtbl->svt_clear)
280 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
283 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
290 Finds the magic pointer for type matching the SV. See C<sv_magic>.
296 Perl_mg_find(pTHX_ SV *sv, int type)
301 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
302 if (mg->mg_type == type)
311 Copies the magic from one SV to another. See C<sv_magic>.
317 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
321 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
322 if (isUPPER(mg->mg_type)) {
324 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
325 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
327 toLOWER(mg->mg_type), key, klen);
337 Free any magic storage used by the SV. See C<sv_magic>.
343 Perl_mg_free(pTHX_ SV *sv)
347 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
348 MGVTBL* vtbl = mg->mg_virtual;
349 moremagic = mg->mg_moremagic;
350 if (vtbl && vtbl->svt_free)
351 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
352 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
354 Safefree(mg->mg_ptr);
355 else if (mg->mg_len == HEf_SVKEY)
356 SvREFCNT_dec((SV*)mg->mg_ptr);
358 if (mg->mg_flags & MGf_REFCOUNTED)
359 SvREFCNT_dec(mg->mg_obj);
367 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
372 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
376 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
377 if (mg->mg_obj) /* @+ */
380 return rx->lastparen;
387 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
395 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
399 if (paren <= rx->nparens &&
400 (s = rx->startp[paren]) != -1 &&
401 (t = rx->endp[paren]) != -1)
403 if (mg->mg_obj) /* @+ */
408 if (i > 0 && PL_reg_match_utf8) {
409 char *b = rx->subbeg;
411 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
421 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
423 Perl_croak(aTHX_ PL_no_modify);
429 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
436 switch (*mg->mg_ptr) {
437 case '1': case '2': case '3': case '4':
438 case '5': case '6': case '7': case '8': case '9': case '&':
439 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
441 paren = atoi(mg->mg_ptr); /* $& is in [0] */
443 if (paren <= rx->nparens &&
444 (s1 = rx->startp[paren]) != -1 &&
445 (t1 = rx->endp[paren]) != -1)
449 if (i > 0 && PL_reg_match_utf8) {
450 char *s = rx->subbeg + s1;
451 char *send = rx->subbeg + t1;
454 if (is_utf8_string((U8*)s, i))
455 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
458 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
464 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
465 paren = rx->lastparen;
470 case '\016': /* ^N */
471 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
472 paren = rx->lastcloseparen;
478 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
479 if (rx->startp[0] != -1) {
490 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
491 if (rx->endp[0] != -1) {
492 i = rx->sublen - rx->endp[0];
503 if (!SvPOK(sv) && SvNIOK(sv)) {
513 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
520 switch (*mg->mg_ptr) {
521 case '\001': /* ^A */
522 sv_setsv(sv, PL_bodytarget);
524 case '\003': /* ^C */
525 sv_setiv(sv, (IV)PL_minus_c);
528 case '\004': /* ^D */
529 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
530 #if defined(YYDEBUG) && defined(DEBUGGING)
531 PL_yydebug = DEBUG_p_TEST;
534 case '\005': /* ^E */
535 if (*(mg->mg_ptr+1) == '\0') {
536 #ifdef MACOS_TRADITIONAL
540 sv_setnv(sv,(double)gMacPerl_OSErr);
541 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
546 # include <descrip.h>
547 # include <starlet.h>
549 $DESCRIPTOR(msgdsc,msg);
550 sv_setnv(sv,(NV) vaxc$errno);
551 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
552 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
558 if (!(_emx_env & 0x200)) { /* Under DOS */
559 sv_setnv(sv, (NV)errno);
560 sv_setpv(sv, errno ? Strerror(errno) : "");
562 if (errno != errno_isOS2) {
563 int tmp = _syserrno();
564 if (tmp) /* 2nd call to _syserrno() makes it 0 */
567 sv_setnv(sv, (NV)Perl_rc);
568 sv_setpv(sv, os2error(Perl_rc));
573 DWORD dwErr = GetLastError();
574 sv_setnv(sv, (NV)dwErr);
577 PerlProc_GetOSError(sv, dwErr);
584 sv_setnv(sv, (NV)errno);
585 sv_setpv(sv, errno ? Strerror(errno) : "");
590 SvNOK_on(sv); /* what a wonderful hack! */
592 else if (strEQ(mg->mg_ptr+1, "NCODING"))
593 sv_setsv(sv, PL_encoding);
595 case '\006': /* ^F */
596 sv_setiv(sv, (IV)PL_maxsysfd);
598 case '\010': /* ^H */
599 sv_setiv(sv, (IV)PL_hints);
601 case '\011': /* ^I */ /* NOT \t in EBCDIC */
603 sv_setpv(sv, PL_inplace);
605 sv_setsv(sv, &PL_sv_undef);
607 case '\017': /* ^O & ^OPEN */
608 if (*(mg->mg_ptr+1) == '\0')
609 sv_setpv(sv, PL_osname);
610 else if (strEQ(mg->mg_ptr, "\017PEN")) {
611 if (!PL_compiling.cop_io)
612 sv_setsv(sv, &PL_sv_undef);
614 sv_setsv(sv, PL_compiling.cop_io);
618 case '\020': /* ^P */
619 sv_setiv(sv, (IV)PL_perldb);
621 case '\023': /* ^S */
623 if (PL_lex_state != LEX_NOTPARSING)
626 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
631 case '\024': /* ^T */
632 if (*(mg->mg_ptr+1) == '\0') {
634 sv_setnv(sv, PL_basetime);
636 sv_setiv(sv, (IV)PL_basetime);
639 else if (strEQ(mg->mg_ptr, "\024AINT"))
640 sv_setiv(sv, PL_tainting);
642 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
643 if (*(mg->mg_ptr+1) == '\0')
644 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
645 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
646 if (PL_compiling.cop_warnings == pWARN_NONE ||
647 PL_compiling.cop_warnings == pWARN_STD)
649 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
651 else if (PL_compiling.cop_warnings == pWARN_ALL) {
652 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
655 sv_setsv(sv, PL_compiling.cop_warnings);
659 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
660 sv_setiv(sv, (IV)PL_widesyscalls);
662 case '1': case '2': case '3': case '4':
663 case '5': case '6': case '7': case '8': case '9': case '&':
664 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
668 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
669 * XXX Does the new way break anything?
671 paren = atoi(mg->mg_ptr); /* $& is in [0] */
673 if (paren <= rx->nparens &&
674 (s1 = rx->startp[paren]) != -1 &&
675 (t1 = rx->endp[paren]) != -1)
684 bool was_tainted = FALSE;
686 was_tainted = PL_tainted;
690 if (PL_reg_match_utf8 && is_utf8_string((U8*)s, i))
695 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
700 sv_setsv(sv,&PL_sv_undef);
703 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
704 paren = rx->lastparen;
708 sv_setsv(sv,&PL_sv_undef);
710 case '\016': /* ^N */
711 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
712 paren = rx->lastcloseparen;
716 sv_setsv(sv,&PL_sv_undef);
719 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
720 if ((s = rx->subbeg) && rx->startp[0] != -1) {
725 sv_setsv(sv,&PL_sv_undef);
728 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
729 if (rx->subbeg && rx->endp[0] != -1) {
730 s = rx->subbeg + rx->endp[0];
731 i = rx->sublen - rx->endp[0];
735 sv_setsv(sv,&PL_sv_undef);
739 if (GvIO(PL_last_in_gv)) {
740 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
746 sv_setiv(sv, (IV)STATUS_CURRENT);
747 #ifdef COMPLEX_STATUS
748 LvTARGOFF(sv) = PL_statusvalue;
749 LvTARGLEN(sv) = PL_statusvalue_vms;
754 s = IoTOP_NAME(GvIOp(PL_defoutgv));
758 sv_setpv(sv,GvENAME(PL_defoutgv));
763 s = IoFMT_NAME(GvIOp(PL_defoutgv));
765 s = GvENAME(PL_defoutgv);
770 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
773 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
776 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
784 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
787 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
793 sv_setpv(sv,SvPVX(PL_ors_sv));
796 sv_setpv(sv,PL_ofmt);
800 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
801 sv_setpv(sv, errno ? Strerror(errno) : "");
804 int saveerrno = errno;
805 sv_setnv(sv, (NV)errno);
807 if (errno == errno_isOS2 || errno == errno_isOS2_set)
808 sv_setpv(sv, os2error(Perl_rc));
811 sv_setpv(sv, errno ? Strerror(errno) : "");
815 SvNOK_on(sv); /* what a wonderful hack! */
818 sv_setiv(sv, (IV)PL_uid);
821 sv_setiv(sv, (IV)PL_euid);
824 sv_setiv(sv, (IV)PL_gid);
826 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
830 sv_setiv(sv, (IV)PL_egid);
832 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
837 Groups_t gary[NGROUPS];
838 i = getgroups(NGROUPS,gary);
840 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
843 (void)SvIOK_on(sv); /* what a wonderful hack! */
847 #ifndef MACOS_TRADITIONAL
851 #ifdef USE_5005THREADS
853 sv_setsv(sv, thr->errsv);
855 #endif /* USE_5005THREADS */
861 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
863 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
865 if (uf && uf->uf_val)
866 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
871 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
881 #ifdef DYNAMIC_ENV_FETCH
882 /* We just undefd an environment var. Is a replacement */
883 /* waiting in the wings? */
886 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
887 s = SvPV(*valp, len);
891 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
892 /* And you'll never guess what the dog had */
893 /* in its mouth... */
895 MgTAINTEDDIR_off(mg);
897 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
898 char pathbuf[256], eltbuf[256], *cp, *elt = s;
902 do { /* DCL$PATH may be a search list */
903 while (1) { /* as may dev portion of any element */
904 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
905 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
906 cando_by_name(S_IWUSR,0,elt) ) {
911 if ((cp = strchr(elt, ':')) != Nullch)
913 if (my_trnlnm(elt, eltbuf, j++))
919 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
922 if (s && klen == 4 && strEQ(ptr,"PATH")) {
923 char *strend = s + len;
929 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
932 if (i >= sizeof tmpbuf /* too long -- assume the worst */
934 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
941 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
947 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
950 my_setenv(MgPV(mg,n_a),Nullch);
955 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
958 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
963 magic_clear_all_env(sv,mg);
964 hv_iterinit((HV*)sv);
965 while ((entry = hv_iternext((HV*)sv))) {
967 my_setenv(hv_iterkey(entry, &keylen),
968 SvPV(hv_iterval((HV*)sv, entry), n_a));
976 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
978 #if defined(VMS) || defined(EPOC)
979 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
981 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
984 # ifdef USE_ENVIRON_ARRAY
985 # ifndef PERL_USE_SAFE_PUTENV
988 if (environ == PL_origenviron)
989 environ = (char**)safesysmalloc(sizeof(char*));
991 for (i = 0; environ[i]; i++)
992 safesysfree(environ[i]);
993 # endif /* PERL_USE_SAFE_PUTENV */
997 # endif /* USE_ENVIRON_ARRAY */
998 # endif /* PERL_IMPLICIT_SYS || WIN32 */
999 #endif /* VMS || EPC */
1003 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1004 static int sig_handlers_initted = 0;
1006 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1007 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1009 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1010 static int sig_defaulting[SIG_SIZE];
1015 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1019 /* Are we fetching a signal entry? */
1020 i = whichsig(MgPV(mg,n_a));
1023 sv_setsv(sv,PL_psig_ptr[i]);
1025 Sighandler_t sigstate;
1026 sigstate = rsignal_state(i);
1027 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1028 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1030 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1031 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1033 /* cache state so we don't fetch it again */
1034 if(sigstate == SIG_IGN)
1035 sv_setpv(sv,"IGNORE");
1037 sv_setsv(sv,&PL_sv_undef);
1038 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1045 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1049 /* Are we clearing a signal entry? */
1050 i = whichsig(MgPV(mg,n_a));
1052 if(PL_psig_ptr[i]) {
1053 SvREFCNT_dec(PL_psig_ptr[i]);
1056 if(PL_psig_name[i]) {
1057 SvREFCNT_dec(PL_psig_name[i]);
1065 Perl_raise_signal(pTHX_ int sig)
1067 /* Set a flag to say this signal is pending */
1068 PL_psig_pend[sig]++;
1069 /* And one to say _a_ signal is pending */
1074 Perl_csighandler(int sig)
1076 #ifndef PERL_OLD_SIGNALS
1079 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1080 (void) rsignal(sig, &Perl_csighandler);
1081 if (sig_ignoring[sig]) return;
1083 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1084 if (sig_defaulting[sig])
1085 #ifdef KILL_BY_SIGPRC
1086 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1092 #ifdef PERL_OLD_SIGNALS
1093 /* Call the perl level handler now with risk we may be in malloc() etc. */
1094 (*PL_sighandlerp)(sig);
1096 Perl_raise_signal(aTHX_ sig);
1100 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1102 Perl_csighandler_init(void)
1105 if (sig_handlers_initted) return;
1107 for (sig = 1; sig < SIG_SIZE; sig++) {
1108 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1110 sig_defaulting[sig] = 1;
1111 (void) rsignal(sig, &Perl_csighandler);
1113 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1114 sig_ignoring[sig] = 0;
1117 sig_handlers_initted = 1;
1122 Perl_despatch_signals(pTHX)
1126 for (sig = 1; sig < SIG_SIZE; sig++) {
1127 if (PL_psig_pend[sig]) {
1128 PL_psig_pend[sig] = 0;
1129 (*PL_sighandlerp)(sig);
1135 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1144 if (strEQ(s,"__DIE__"))
1146 else if (strEQ(s,"__WARN__"))
1149 Perl_croak(aTHX_ "No such hook: %s", s);
1157 i = whichsig(s); /* ...no, a brick */
1159 if (ckWARN(WARN_SIGNAL))
1160 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1163 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1164 if (!sig_handlers_initted) Perl_csighandler_init();
1166 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1167 sig_ignoring[i] = 0;
1169 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1170 sig_defaulting[i] = 0;
1172 SvREFCNT_dec(PL_psig_name[i]);
1173 SvREFCNT_dec(PL_psig_ptr[i]);
1174 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1175 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1176 PL_psig_name[i] = newSVpvn(s, len);
1177 SvREADONLY_on(PL_psig_name[i]);
1179 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1181 (void)rsignal(i, &Perl_csighandler);
1183 *svp = SvREFCNT_inc(sv);
1186 s = SvPV_force(sv,len);
1187 if (strEQ(s,"IGNORE")) {
1189 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1190 sig_ignoring[i] = 1;
1191 (void)rsignal(i, &Perl_csighandler);
1193 (void)rsignal(i, SIG_IGN);
1198 else if (strEQ(s,"DEFAULT") || !*s) {
1200 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1202 sig_defaulting[i] = 1;
1203 (void)rsignal(i, &Perl_csighandler);
1206 (void)rsignal(i, SIG_DFL);
1213 * We should warn if HINT_STRICT_REFS, but without
1214 * access to a known hint bit in a known OP, we can't
1215 * tell whether HINT_STRICT_REFS is in force or not.
1217 if (!strchr(s,':') && !strchr(s,'\''))
1218 sv_insert(sv, 0, 0, "main::", 6);
1220 (void)rsignal(i, &Perl_csighandler);
1222 *svp = SvREFCNT_inc(sv);
1226 #endif /* !PERL_MICRO */
1229 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1231 PL_sub_generation++;
1236 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1238 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1239 PL_amagic_generation++;
1245 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1247 HV *hv = (HV*)LvTARG(sv);
1251 (void) hv_iterinit(hv);
1252 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1255 while (hv_iternext(hv))
1260 sv_setiv(sv, (IV)i);
1265 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1268 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1273 /* caller is responsible for stack switching/cleanup */
1275 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1281 PUSHs(SvTIED_obj(sv, mg));
1284 if (mg->mg_len >= 0)
1285 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1286 else if (mg->mg_len == HEf_SVKEY)
1287 PUSHs((SV*)mg->mg_ptr);
1289 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1290 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1298 return call_method(meth, flags);
1302 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1308 PUSHSTACKi(PERLSI_MAGIC);
1310 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1311 sv_setsv(sv, *PL_stack_sp--);
1321 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1323 magic_methpack(sv,mg,"FETCH");
1325 mg->mg_flags |= MGf_GSKIP;
1330 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1334 PUSHSTACKi(PERLSI_MAGIC);
1335 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1342 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1344 return magic_methpack(sv,mg,"DELETE");
1349 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1356 PUSHSTACKi(PERLSI_MAGIC);
1357 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1358 sv = *PL_stack_sp--;
1359 retval = (U32) SvIV(sv)-1;
1368 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1373 PUSHSTACKi(PERLSI_MAGIC);
1375 XPUSHs(SvTIED_obj(sv, mg));
1377 call_method("CLEAR", G_SCALAR|G_DISCARD);
1384 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1387 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1391 PUSHSTACKi(PERLSI_MAGIC);
1394 PUSHs(SvTIED_obj(sv, mg));
1399 if (call_method(meth, G_SCALAR))
1400 sv_setsv(key, *PL_stack_sp--);
1409 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1411 return magic_methpack(sv,mg,"EXISTS");
1415 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1425 svp = av_fetch(GvAV(gv),
1426 atoi(MgPV(mg,n_a)), FALSE);
1427 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1433 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1435 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1440 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1442 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1447 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1449 SV* lsv = LvTARG(sv);
1451 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1452 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1453 if (mg && mg->mg_len >= 0) {
1456 sv_pos_b2u(lsv, &i);
1457 sv_setiv(sv, i + PL_curcop->cop_arybase);
1466 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1468 SV* lsv = LvTARG(sv);
1475 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1476 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1480 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1481 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1483 else if (!SvOK(sv)) {
1487 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1489 pos = SvIV(sv) - PL_curcop->cop_arybase;
1492 ulen = sv_len_utf8(lsv);
1507 sv_pos_u2b(lsv, &p, 0);
1512 mg->mg_flags &= ~MGf_MINMATCH;
1518 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1520 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1522 gv_efullname3(sv,((GV*)sv), "*");
1526 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1531 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1540 if (*s == '*' && s[1])
1542 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1547 GvGP(sv) = gp_ref(GvGP(gv));
1552 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1555 SV *lsv = LvTARG(sv);
1556 char *tmps = SvPV(lsv,len);
1557 I32 offs = LvTARGOFF(sv);
1558 I32 rem = LvTARGLEN(sv);
1561 sv_pos_u2b(lsv, &offs, &rem);
1564 if (rem + offs > len)
1566 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1573 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1576 char *tmps = SvPV(sv, len);
1577 SV *lsv = LvTARG(sv);
1578 I32 lvoff = LvTARGOFF(sv);
1579 I32 lvlen = LvTARGLEN(sv);
1582 sv_utf8_upgrade(lsv);
1583 sv_pos_u2b(lsv, &lvoff, &lvlen);
1584 sv_insert(lsv, lvoff, lvlen, tmps, len);
1587 else if (lsv && SvUTF8(lsv)) {
1588 sv_pos_u2b(lsv, &lvoff, &lvlen);
1589 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1590 sv_insert(lsv, lvoff, lvlen, tmps, len);
1594 sv_insert(lsv, lvoff, lvlen, tmps, len);
1600 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1602 TAINT_IF((mg->mg_len & 1) ||
1603 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1608 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1610 if (PL_localizing) {
1611 if (PL_localizing == 1)
1616 else if (PL_tainted)
1624 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1626 SV *lsv = LvTARG(sv);
1633 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1638 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1640 do_vecset(sv); /* XXX slurp this routine */
1645 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1648 if (LvTARGLEN(sv)) {
1650 SV *ahv = LvTARG(sv);
1651 if (SvTYPE(ahv) == SVt_PVHV) {
1652 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1657 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1663 AV* av = (AV*)LvTARG(sv);
1664 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1665 targ = AvARRAY(av)[LvTARGOFF(sv)];
1667 if (targ && targ != &PL_sv_undef) {
1668 /* somebody else defined it for us */
1669 SvREFCNT_dec(LvTARG(sv));
1670 LvTARG(sv) = SvREFCNT_inc(targ);
1672 SvREFCNT_dec(mg->mg_obj);
1673 mg->mg_obj = Nullsv;
1674 mg->mg_flags &= ~MGf_REFCOUNTED;
1679 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1684 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1689 sv_setsv(LvTARG(sv), sv);
1690 SvSETMAGIC(LvTARG(sv));
1696 Perl_vivify_defelem(pTHX_ SV *sv)
1701 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1704 SV *ahv = LvTARG(sv);
1706 if (SvTYPE(ahv) == SVt_PVHV) {
1707 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1712 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1716 if (!value || value == &PL_sv_undef)
1717 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1720 AV* av = (AV*)LvTARG(sv);
1721 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1722 LvTARG(sv) = Nullsv; /* array can't be extended */
1724 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1725 if (!svp || (value = *svp) == &PL_sv_undef)
1726 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1729 (void)SvREFCNT_inc(value);
1730 SvREFCNT_dec(LvTARG(sv));
1733 SvREFCNT_dec(mg->mg_obj);
1734 mg->mg_obj = Nullsv;
1735 mg->mg_flags &= ~MGf_REFCOUNTED;
1739 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1741 AV *av = (AV*)mg->mg_obj;
1742 SV **svp = AvARRAY(av);
1743 I32 i = AvFILLp(av);
1745 if (svp[i] && svp[i] != &PL_sv_undef) {
1746 if (!SvWEAKREF(svp[i]))
1747 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1748 /* XXX Should we check that it hasn't changed? */
1750 (void)SvOK_off(svp[i]);
1751 SvWEAKREF_off(svp[i]);
1752 svp[i] = &PL_sv_undef;
1760 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1768 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1770 sv_unmagic(sv, PERL_MAGIC_bm);
1776 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1778 sv_unmagic(sv, PERL_MAGIC_fm);
1784 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1786 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1788 if (uf && uf->uf_set)
1789 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1794 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1796 regexp *re = (regexp *)mg->mg_obj;
1801 #ifdef USE_LOCALE_COLLATE
1803 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1806 * RenE<eacute> Descartes said "I think not."
1807 * and vanished with a faint plop.
1810 Safefree(mg->mg_ptr);
1816 #endif /* USE_LOCALE_COLLATE */
1819 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1824 switch (*mg->mg_ptr) {
1825 case '\001': /* ^A */
1826 sv_setsv(PL_bodytarget, sv);
1828 case '\003': /* ^C */
1829 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1832 case '\004': /* ^D */
1833 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1834 DEBUG_x(dump_all());
1836 case '\005': /* ^E */
1837 if (*(mg->mg_ptr+1) == '\0') {
1838 #ifdef MACOS_TRADITIONAL
1839 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1842 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1845 SetLastError( SvIV(sv) );
1848 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1850 /* will anyone ever use this? */
1851 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1857 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
1859 sv_setsv(PL_encoding, sv);
1861 PL_encoding = newSVsv(sv);
1863 case '\006': /* ^F */
1864 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1866 case '\010': /* ^H */
1867 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1869 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1871 Safefree(PL_inplace);
1873 PL_inplace = savepv(SvPV(sv,len));
1875 PL_inplace = Nullch;
1877 case '\017': /* ^O */
1878 if (*(mg->mg_ptr+1) == '\0') {
1880 Safefree(PL_osname);
1882 PL_osname = savepv(SvPV(sv,len));
1886 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1887 if (!PL_compiling.cop_io)
1888 PL_compiling.cop_io = newSVsv(sv);
1890 sv_setsv(PL_compiling.cop_io,sv);
1893 case '\020': /* ^P */
1894 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1895 if (PL_perldb && !PL_DBsingle)
1898 case '\024': /* ^T */
1900 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1902 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1905 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1906 if (*(mg->mg_ptr+1) == '\0') {
1907 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1908 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1909 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1910 | (i ? G_WARN_ON : G_WARN_OFF) ;
1913 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
1914 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1915 if (!SvPOK(sv) && PL_localizing) {
1916 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1917 PL_compiling.cop_warnings = pWARN_NONE;
1922 int accumulate = 0 ;
1923 int any_fatals = 0 ;
1924 char * ptr = (char*)SvPV(sv, len) ;
1925 for (i = 0 ; i < len ; ++i) {
1926 accumulate |= ptr[i] ;
1927 any_fatals |= (ptr[i] & 0xAA) ;
1930 PL_compiling.cop_warnings = pWARN_NONE;
1931 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1932 PL_compiling.cop_warnings = pWARN_ALL;
1933 PL_dowarn |= G_WARN_ONCE ;
1936 if (specialWARN(PL_compiling.cop_warnings))
1937 PL_compiling.cop_warnings = newSVsv(sv) ;
1939 sv_setsv(PL_compiling.cop_warnings, sv);
1940 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1941 PL_dowarn |= G_WARN_ONCE ;
1947 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
1948 PL_widesyscalls = SvTRUE(sv);
1951 if (PL_localizing) {
1952 if (PL_localizing == 1)
1953 SAVESPTR(PL_last_in_gv);
1955 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1956 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
1959 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1960 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1961 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1964 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1965 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1966 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1969 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1972 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1973 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1974 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1977 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1981 IO *io = GvIOp(PL_defoutgv);
1984 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1985 IoFLAGS(io) &= ~IOf_FLUSH;
1987 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1988 PerlIO *ofp = IoOFP(io);
1990 (void)PerlIO_flush(ofp);
1991 IoFLAGS(io) |= IOf_FLUSH;
1997 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1998 PL_multiline = (i != 0);
2001 SvREFCNT_dec(PL_rs);
2002 PL_rs = newSVsv(sv);
2006 SvREFCNT_dec(PL_ors_sv);
2007 if (SvOK(sv) || SvGMAGICAL(sv)) {
2008 PL_ors_sv = newSVsv(sv);
2016 SvREFCNT_dec(PL_ofs_sv);
2017 if (SvOK(sv) || SvGMAGICAL(sv)) {
2018 PL_ofs_sv = newSVsv(sv);
2027 PL_ofmt = savepv(SvPV(sv,len));
2030 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2033 #ifdef COMPLEX_STATUS
2034 if (PL_localizing == 2) {
2035 PL_statusvalue = LvTARGOFF(sv);
2036 PL_statusvalue_vms = LvTARGLEN(sv);
2040 #ifdef VMSISH_STATUS
2042 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2045 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2048 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2049 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
2052 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2053 if (PL_delaymagic) {
2054 PL_delaymagic |= DM_RUID;
2055 break; /* don't do magic till later */
2058 (void)setruid((Uid_t)PL_uid);
2061 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2063 #ifdef HAS_SETRESUID
2064 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2066 if (PL_uid == PL_euid) /* special case $< = $> */
2067 (void)PerlProc_setuid(PL_uid);
2069 PL_uid = PerlProc_getuid();
2070 Perl_croak(aTHX_ "setruid() not implemented");
2075 PL_uid = PerlProc_getuid();
2076 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2079 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2080 if (PL_delaymagic) {
2081 PL_delaymagic |= DM_EUID;
2082 break; /* don't do magic till later */
2085 (void)seteuid((Uid_t)PL_euid);
2088 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2090 #ifdef HAS_SETRESUID
2091 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2093 if (PL_euid == PL_uid) /* special case $> = $< */
2094 PerlProc_setuid(PL_euid);
2096 PL_euid = PerlProc_geteuid();
2097 Perl_croak(aTHX_ "seteuid() not implemented");
2102 PL_euid = PerlProc_geteuid();
2103 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2106 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2107 if (PL_delaymagic) {
2108 PL_delaymagic |= DM_RGID;
2109 break; /* don't do magic till later */
2112 (void)setrgid((Gid_t)PL_gid);
2115 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2117 #ifdef HAS_SETRESGID
2118 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2120 if (PL_gid == PL_egid) /* special case $( = $) */
2121 (void)PerlProc_setgid(PL_gid);
2123 PL_gid = PerlProc_getgid();
2124 Perl_croak(aTHX_ "setrgid() not implemented");
2129 PL_gid = PerlProc_getgid();
2130 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2133 #ifdef HAS_SETGROUPS
2135 char *p = SvPV(sv, len);
2136 Groups_t gary[NGROUPS];
2141 for (i = 0; i < NGROUPS; ++i) {
2142 while (*p && !isSPACE(*p))
2151 (void)setgroups(i, gary);
2153 #else /* HAS_SETGROUPS */
2154 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2155 #endif /* HAS_SETGROUPS */
2156 if (PL_delaymagic) {
2157 PL_delaymagic |= DM_EGID;
2158 break; /* don't do magic till later */
2161 (void)setegid((Gid_t)PL_egid);
2164 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2166 #ifdef HAS_SETRESGID
2167 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2169 if (PL_egid == PL_gid) /* special case $) = $( */
2170 (void)PerlProc_setgid(PL_egid);
2172 PL_egid = PerlProc_getegid();
2173 Perl_croak(aTHX_ "setegid() not implemented");
2178 PL_egid = PerlProc_getegid();
2179 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2182 PL_chopset = SvPV_force(sv,len);
2184 #ifndef MACOS_TRADITIONAL
2186 #ifdef HAS_SETPROCTITLE
2187 /* The BSDs don't show the argv[] in ps(1) output, they
2188 * show a string from the process struct and provide
2189 * the setproctitle() routine to manipulate that. */
2192 # if __FreeBSD_version > 410001
2193 /* The leading "-" removes the "perl: " prefix,
2194 * but not the "(perl) suffix from the ps(1)
2195 * output, because that's what ps(1) shows if the
2196 * argv[] is modified. */
2197 setproctitle("-%s", s);
2198 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2199 /* This doesn't really work if you assume that
2200 * $0 = 'foobar'; will wipe out 'perl' from the $0
2201 * because in ps(1) output the result will be like
2202 * sprintf("perl: %s (perl)", s)
2203 * I guess this is a security feature:
2204 * one (a user process) cannot get rid of the original name.
2206 setproctitle("%s", s);
2213 /* See if all the arguments are contiguous in memory */
2214 for (i = 1; i < PL_origargc; i++) {
2215 if (PL_origargv[i] == s + 1
2217 || PL_origargv[i] == s + 2
2222 s += strlen(s); /* this one is ok too */
2227 /* can grab env area too? */
2228 if (PL_origenviron && (PL_origenviron[0] == s + 1)) {
2229 my_setenv("NoNe SuCh", Nullch);
2230 /* force copy of environment */
2231 for (i = 0; PL_origenviron[i]; i++)
2232 if (PL_origenviron[i] == s + 1) {
2239 PL_origalen = s - PL_origargv[0];
2241 s = SvPV_force(sv,len);
2243 if (i >= PL_origalen) {
2245 /* don't allow system to limit $0 seen by script */
2246 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2247 Copy(s, PL_origargv[0], i, char);
2248 s = PL_origargv[0]+i;
2252 Copy(s, PL_origargv[0], i, char);
2253 s = PL_origargv[0]+i;
2255 while (++i < PL_origalen)
2257 s = PL_origargv[0]+i;
2258 for (i = 1; i < PL_origargc; i++)
2259 PL_origargv[i] = Nullch;
2263 #ifdef USE_5005THREADS
2265 sv_setsv(thr->errsv, sv);
2267 #endif /* USE_5005THREADS */
2272 #ifdef USE_5005THREADS
2274 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2276 DEBUG_S(PerlIO_printf(Perl_debug_log,
2277 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2278 PTR2UV(thr), PTR2UV(sv)));
2280 Perl_croak(aTHX_ "panic: magic_mutexfree");
2281 MUTEX_DESTROY(MgMUTEXP(mg));
2282 COND_DESTROY(MgCONDP(mg));
2285 #endif /* USE_5005THREADS */
2288 Perl_whichsig(pTHX_ char *sig)
2290 register char **sigv;
2292 for (sigv = PL_sig_name+1; *sigv; sigv++)
2293 if (strEQ(sig,*sigv))
2294 return PL_sig_num[sigv - PL_sig_name];
2296 if (strEQ(sig,"CHLD"))
2300 if (strEQ(sig,"CLD"))
2306 #if !defined(PERL_IMPLICIT_CONTEXT)
2311 Perl_sighandler(int sig)
2313 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2314 dTHXa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2321 SV *sv = Nullsv, *tSv = PL_Sv;
2327 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2328 PERL_SET_THX(aTHX); /* fake TLS, see above */
2331 if (PL_savestack_ix + 15 <= PL_savestack_max)
2333 if (PL_markstack_ptr < PL_markstack_max - 2)
2335 if (PL_retstack_ix < PL_retstack_max - 2)
2337 if (PL_scopestack_ix < PL_scopestack_max - 3)
2340 if (!PL_psig_ptr[sig])
2341 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2344 /* Max number of items pushed there is 3*n or 4. We cannot fix
2345 infinity, so we fix 4 (in fact 5): */
2347 PL_savestack_ix += 5; /* Protect save in progress. */
2348 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2351 PL_markstack_ptr++; /* Protect mark. */
2354 PL_retstack[PL_retstack_ix] = NULL;
2357 PL_scopestack_ix += 1;
2358 /* sv_2cv is too complicated, try a simpler variant first: */
2359 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2360 || SvTYPE(cv) != SVt_PVCV)
2361 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2363 if (!cv || !CvROOT(cv)) {
2364 if (ckWARN(WARN_SIGNAL))
2365 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2366 PL_sig_name[sig], (gv ? GvENAME(gv)
2373 if(PL_psig_name[sig]) {
2374 sv = SvREFCNT_inc(PL_psig_name[sig]);
2376 #if !defined(PERL_IMPLICIT_CONTEXT)
2380 sv = sv_newmortal();
2381 sv_setpv(sv,PL_sig_name[sig]);
2384 PUSHSTACKi(PERLSI_SIGNAL);
2389 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2392 if (SvTRUE(ERRSV)) {
2394 #ifdef HAS_SIGPROCMASK
2395 /* Handler "died", for example to get out of a restart-able read().
2396 * Before we re-do that on its behalf re-enable the signal which was
2397 * blocked by the system when we entered.
2401 sigaddset(&set,sig);
2402 sigprocmask(SIG_UNBLOCK, &set, NULL);
2404 /* Not clear if this will work */
2405 (void)rsignal(sig, SIG_IGN);
2406 (void)rsignal(sig, &Perl_csighandler);
2408 #endif /* !PERL_MICRO */
2409 Perl_die(aTHX_ Nullformat);
2413 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2419 PL_scopestack_ix -= 1;
2422 PL_op = myop; /* Apparently not needed... */
2424 PL_Sv = tSv; /* Restore global temporaries. */
2431 restore_magic(pTHX_ void *p)
2433 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2434 SV* sv = mgs->mgs_sv;
2439 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2442 SvFLAGS(sv) |= mgs->mgs_flags;
2446 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2449 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2451 /* If we're still on top of the stack, pop us off. (That condition
2452 * will be satisfied if restore_magic was called explicitly, but *not*
2453 * if it's being called via leave_scope.)
2454 * The reason for doing this is that otherwise, things like sv_2cv()
2455 * may leave alloc gunk on the savestack, and some code
2456 * (e.g. sighandler) doesn't expect that...
2458 if (PL_savestack_ix == mgs->mgs_ss_ix)
2460 I32 popval = SSPOPINT;
2461 assert(popval == SAVEt_DESTRUCTOR_X);
2462 PL_savestack_ix -= 2;
2464 assert(popval == SAVEt_ALLOC);
2466 PL_savestack_ix -= popval;
2472 unwind_handler_stack(pTHX_ void *p)
2474 U32 flags = *(U32*)p;
2477 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2478 /* cxstack_ix-- Not needed, die already unwound it. */
2479 #if !defined(PERL_IMPLICIT_CONTEXT)
2481 SvREFCNT_dec(sig_sv);