3 * Copyright (c) 1991-1999, 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."
19 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
24 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
30 static void restore_magic(pTHXo_ void *p);
31 static void unwind_handler_stack(pTHXo_ void *p);
34 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
42 /* MGS is typedef'ed to struct magic_state in perl.h */
45 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
49 assert(SvMAGICAL(sv));
51 SAVEDESTRUCTOR_X(restore_magic, (void*)mgs_ix);
53 mgs = SSPTR(mgs_ix, MGS*);
55 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
56 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
60 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
64 =for apidoc mg_magical
66 Turns on the magical status of an SV. See C<sv_magic>.
72 Perl_mg_magical(pTHX_ SV *sv)
75 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
76 MGVTBL* vtbl = mg->mg_virtual;
78 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
82 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
91 Do magic after a value is retrieved from the SV. See C<sv_magic>.
97 Perl_mg_get(pTHX_ SV *sv)
105 mgs_ix = SSNEW(sizeof(MGS));
106 save_magic(mgs_ix, sv);
109 while ((mg = *mgp) != 0) {
110 MGVTBL* vtbl = mg->mg_virtual;
111 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
112 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
113 /* Ignore this magic if it's been deleted */
114 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
115 (mg->mg_flags & MGf_GSKIP))
116 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
118 /* Advance to next magic (complicated by possible deletion) */
119 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
120 mgp = &mg->mg_moremagic;
124 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
127 restore_magic(aTHXo_ (void*)mgs_ix);
134 Do magic after a value is assigned to the SV. See C<sv_magic>.
140 Perl_mg_set(pTHX_ SV *sv)
147 mgs_ix = SSNEW(sizeof(MGS));
148 save_magic(mgs_ix, sv);
150 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
151 MGVTBL* vtbl = mg->mg_virtual;
152 nextmg = mg->mg_moremagic; /* it may delete itself */
153 if (mg->mg_flags & MGf_GSKIP) {
154 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
155 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
157 if (vtbl && vtbl->svt_set)
158 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
161 restore_magic(aTHXo_ (void*)mgs_ix);
166 =for apidoc mg_length
168 Report on the SV's length. See C<sv_magic>.
174 Perl_mg_length(pTHX_ SV *sv)
180 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
181 MGVTBL* vtbl = mg->mg_virtual;
182 if (vtbl && vtbl->svt_len) {
185 mgs_ix = SSNEW(sizeof(MGS));
186 save_magic(mgs_ix, sv);
187 /* omit MGf_GSKIP -- not changed here */
188 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
189 restore_magic(aTHXo_ (void*)mgs_ix);
194 junk = SvPV(sv, len);
199 Perl_mg_size(pTHX_ SV *sv)
204 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
205 MGVTBL* vtbl = mg->mg_virtual;
206 if (vtbl && vtbl->svt_len) {
209 mgs_ix = SSNEW(sizeof(MGS));
210 save_magic(mgs_ix, sv);
211 /* omit MGf_GSKIP -- not changed here */
212 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
213 restore_magic(aTHXo_ (void*)mgs_ix);
220 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
225 Perl_croak(aTHX_ "Size magic not implemented");
234 Clear something magical that the SV represents. See C<sv_magic>.
240 Perl_mg_clear(pTHX_ SV *sv)
245 mgs_ix = SSNEW(sizeof(MGS));
246 save_magic(mgs_ix, sv);
248 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
249 MGVTBL* vtbl = mg->mg_virtual;
250 /* omit GSKIP -- never set here */
252 if (vtbl && vtbl->svt_clear)
253 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
256 restore_magic(aTHXo_ (void*)mgs_ix);
263 Finds the magic pointer for type matching the SV. See C<sv_magic>.
269 Perl_mg_find(pTHX_ SV *sv, int type)
272 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
273 if (mg->mg_type == type)
282 Copies the magic from one SV to another. See C<sv_magic>.
288 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
292 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
293 if (isUPPER(mg->mg_type)) {
295 mg->mg_type == 'P' ? SvTIED_obj(sv, mg) : mg->mg_obj,
296 toLOWER(mg->mg_type), key, klen);
306 Free any magic storage used by the SV. See C<sv_magic>.
312 Perl_mg_free(pTHX_ SV *sv)
316 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
317 MGVTBL* vtbl = mg->mg_virtual;
318 moremagic = mg->mg_moremagic;
319 if (vtbl && vtbl->svt_free)
320 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
321 if (mg->mg_ptr && mg->mg_type != 'g')
323 Safefree(mg->mg_ptr);
324 else if (mg->mg_len == HEf_SVKEY)
325 SvREFCNT_dec((SV*)mg->mg_ptr);
326 if (mg->mg_flags & MGf_REFCOUNTED)
327 SvREFCNT_dec(mg->mg_obj);
334 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
339 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
347 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
348 if (mg->mg_obj) /* @+ */
351 return rx->lastparen;
358 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
367 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
371 if (paren <= rx->nparens &&
372 (s = rx->startp[paren]) != -1 &&
373 (t = rx->endp[paren]) != -1)
375 if (mg->mg_obj) /* @+ */
386 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
395 switch (*mg->mg_ptr) {
396 case '1': case '2': case '3': case '4':
397 case '5': case '6': case '7': case '8': case '9': case '&':
398 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
401 paren = atoi(mg->mg_ptr);
403 if (paren <= rx->nparens &&
404 (s1 = rx->startp[paren]) != -1 &&
405 (t1 = rx->endp[paren]) != -1)
414 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
415 paren = rx->lastparen;
421 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
422 if (rx->startp[0] != -1) {
430 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
431 if (rx->endp[0] != -1) {
432 i = rx->sublen - rx->endp[0];
439 return (STRLEN)PL_ofslen;
441 return (STRLEN)PL_orslen;
444 if (!SvPOK(sv) && SvNIOK(sv)) {
454 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
463 switch (*mg->mg_ptr) {
464 case '\001': /* ^A */
465 sv_setsv(sv, PL_bodytarget);
467 case '\003': /* ^C */
468 sv_setiv(sv, (IV)PL_minus_c);
471 case '\004': /* ^D */
472 sv_setiv(sv, (IV)(PL_debug & 32767));
473 #if defined(YYDEBUG) && defined(DEBUGGING)
474 PL_yydebug = (PL_debug & 1);
477 case '\005': /* ^E */
478 #ifdef MACOS_TRADITIONAL
482 sv_setnv(sv,(double)gLastMacOSErr);
483 sv_setpv(sv, gLastMacOSErr ? GetSysErrText(gLastMacOSErr, msg) : "");
488 # include <descrip.h>
489 # include <starlet.h>
491 $DESCRIPTOR(msgdsc,msg);
492 sv_setnv(sv,(NV) vaxc$errno);
493 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
494 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
500 if (!(_emx_env & 0x200)) { /* Under DOS */
501 sv_setnv(sv, (NV)errno);
502 sv_setpv(sv, errno ? Strerror(errno) : "");
504 if (errno != errno_isOS2) {
505 int tmp = _syserrno();
506 if (tmp) /* 2nd call to _syserrno() makes it 0 */
509 sv_setnv(sv, (NV)Perl_rc);
510 sv_setpv(sv, os2error(Perl_rc));
515 DWORD dwErr = GetLastError();
516 sv_setnv(sv, (NV)dwErr);
519 PerlProc_GetOSError(sv, dwErr);
526 sv_setnv(sv, (NV)errno);
527 sv_setpv(sv, errno ? Strerror(errno) : "");
532 SvNOK_on(sv); /* what a wonderful hack! */
534 case '\006': /* ^F */
535 sv_setiv(sv, (IV)PL_maxsysfd);
537 case '\010': /* ^H */
538 sv_setiv(sv, (IV)PL_hints);
540 case '\011': /* ^I */ /* NOT \t in EBCDIC */
542 sv_setpv(sv, PL_inplace);
544 sv_setsv(sv, &PL_sv_undef);
546 case '\017': /* ^O */
547 sv_setpv(sv, PL_osname);
549 case '\020': /* ^P */
550 sv_setiv(sv, (IV)PL_perldb);
552 case '\023': /* ^S */
555 if (PL_lex_state != LEX_NOTPARSING)
563 case '\024': /* ^T */
565 sv_setnv(sv, PL_basetime);
567 sv_setiv(sv, (IV)PL_basetime);
570 case '\027': /* ^W & $^Warnings*/
571 if (*(mg->mg_ptr+1) == '\0')
572 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
573 else if (strEQ(mg->mg_ptr, "\027arnings")) {
574 if (PL_compiling.cop_warnings == WARN_NONE ||
575 PL_compiling.cop_warnings == WARN_STD)
577 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
579 else if (PL_compiling.cop_warnings == WARN_ALL) {
580 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
583 sv_setsv(sv, PL_compiling.cop_warnings);
587 case '1': case '2': case '3': case '4':
588 case '5': case '6': case '7': case '8': case '9': case '&':
589 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
593 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
594 * XXX Does the new way break anything?
596 paren = atoi(mg->mg_ptr);
598 if (paren <= rx->nparens &&
599 (s1 = rx->startp[paren]) != -1 &&
600 (t1 = rx->endp[paren]) != -1)
608 was_tainted = PL_tainted;
612 if ((PL_curpm->op_pmdynflags & PMdf_UTF8) && !IN_BYTE)
617 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
622 sv_setsv(sv,&PL_sv_undef);
625 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
626 paren = rx->lastparen;
630 sv_setsv(sv,&PL_sv_undef);
633 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
634 if ((s = rx->subbeg) && rx->startp[0] != -1) {
639 sv_setsv(sv,&PL_sv_undef);
642 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
643 if (rx->subbeg && rx->endp[0] != -1) {
644 s = rx->subbeg + rx->endp[0];
645 i = rx->sublen - rx->endp[0];
649 sv_setsv(sv,&PL_sv_undef);
653 if (GvIO(PL_last_in_gv)) {
654 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
660 sv_setiv(sv, (IV)STATUS_CURRENT);
661 #ifdef COMPLEX_STATUS
662 LvTARGOFF(sv) = PL_statusvalue;
663 LvTARGLEN(sv) = PL_statusvalue_vms;
668 s = IoTOP_NAME(GvIOp(PL_defoutgv));
672 sv_setpv(sv,GvENAME(PL_defoutgv));
677 s = IoFMT_NAME(GvIOp(PL_defoutgv));
679 s = GvENAME(PL_defoutgv);
684 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
687 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
690 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
698 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
701 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
704 sv_setpvn(sv,PL_ofs,PL_ofslen);
707 sv_setpvn(sv,PL_ors,PL_orslen);
710 sv_setpv(sv,PL_ofmt);
714 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
715 sv_setpv(sv, errno ? Strerror(errno) : "");
718 int saveerrno = errno;
719 sv_setnv(sv, (NV)errno);
721 if (errno == errno_isOS2 || errno == errno_isOS2_set)
722 sv_setpv(sv, os2error(Perl_rc));
725 sv_setpv(sv, errno ? Strerror(errno) : "");
729 SvNOK_on(sv); /* what a wonderful hack! */
732 sv_setiv(sv, (IV)PL_uid);
735 sv_setiv(sv, (IV)PL_euid);
738 sv_setiv(sv, (IV)PL_gid);
740 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
744 sv_setiv(sv, (IV)PL_egid);
746 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
751 Groups_t gary[NGROUPS];
752 i = getgroups(NGROUPS,gary);
754 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
757 SvIOK_on(sv); /* what a wonderful hack! */
761 #ifndef MACOS_TRADITIONAL
767 sv_setsv(sv, thr->errsv);
769 #endif /* USE_THREADS */
775 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
777 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
779 if (uf && uf->uf_val)
780 (*uf->uf_val)(uf->uf_index, sv);
785 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
796 #ifdef DYNAMIC_ENV_FETCH
797 /* We just undefd an environment var. Is a replacement */
798 /* waiting in the wings? */
801 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
802 s = SvPV(*valp, len);
806 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
807 /* And you'll never guess what the dog had */
808 /* in its mouth... */
810 MgTAINTEDDIR_off(mg);
812 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
813 char pathbuf[256], eltbuf[256], *cp, *elt = s;
817 do { /* DCL$PATH may be a search list */
818 while (1) { /* as may dev portion of any element */
819 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
820 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
821 cando_by_name(S_IWUSR,0,elt) ) {
826 if ((cp = strchr(elt, ':')) != Nullch)
828 if (my_trnlnm(elt, eltbuf, j++))
834 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
837 if (s && klen == 4 && strEQ(ptr,"PATH")) {
838 char *strend = s + len;
843 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
846 if (i >= sizeof tmpbuf /* too long -- assume the worst */
848 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
855 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
861 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
864 my_setenv(MgPV(mg,n_a),Nullch);
869 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
872 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
878 magic_clear_all_env(sv,mg);
879 hv_iterinit((HV*)sv);
880 while (entry = hv_iternext((HV*)sv)) {
882 my_setenv(hv_iterkey(entry, &keylen),
883 SvPV(hv_iterval((HV*)sv, entry), n_a));
891 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
894 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
896 # ifdef PERL_IMPLICIT_SYS
900 char *envv = GetEnvironmentStrings();
904 char *end = strchr(cur,'=');
905 if (end && end != cur) {
907 my_setenv(cur,Nullch);
909 cur = end + strlen(end+1)+2;
911 else if ((len = strlen(cur)))
914 FreeEnvironmentStrings(envv);
918 for (i = 0; environ[i]; i++)
919 safesysfree(environ[i]);
921 # ifndef PERL_USE_SAFE_PUTENV
924 if (environ == PL_origenviron)
925 environ = (char**)safesysmalloc(sizeof(char*));
927 for (i = 0; environ[i]; i++)
928 safesysfree(environ[i]);
929 # endif /* PERL_USE_SAFE_PUTENV */
935 # endif /* PERL_IMPLICIT_SYS */
941 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
945 /* Are we fetching a signal entry? */
946 i = whichsig(MgPV(mg,n_a));
949 sv_setsv(sv,PL_psig_ptr[i]);
951 Sighandler_t sigstate = rsignal_state(i);
953 /* cache state so we don't fetch it again */
954 if(sigstate == SIG_IGN)
955 sv_setpv(sv,"IGNORE");
957 sv_setsv(sv,&PL_sv_undef);
958 PL_psig_ptr[i] = SvREFCNT_inc(sv);
965 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
969 /* Are we clearing a signal entry? */
970 i = whichsig(MgPV(mg,n_a));
973 SvREFCNT_dec(PL_psig_ptr[i]);
976 if(PL_psig_name[i]) {
977 SvREFCNT_dec(PL_psig_name[i]);
985 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
995 if (strEQ(s,"__DIE__"))
997 else if (strEQ(s,"__WARN__"))
1000 Perl_croak(aTHX_ "No such hook: %s", s);
1008 i = whichsig(s); /* ...no, a brick */
1010 if (ckWARN(WARN_SIGNAL) || strEQ(s,"ALARM"))
1011 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1014 SvREFCNT_dec(PL_psig_name[i]);
1015 SvREFCNT_dec(PL_psig_ptr[i]);
1016 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1017 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1018 PL_psig_name[i] = newSVpvn(s, len);
1019 SvREADONLY_on(PL_psig_name[i]);
1021 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1023 (void)rsignal(i, PL_sighandlerp);
1025 *svp = SvREFCNT_inc(sv);
1028 s = SvPV_force(sv,len);
1029 if (strEQ(s,"IGNORE")) {
1031 (void)rsignal(i, SIG_IGN);
1035 else if (strEQ(s,"DEFAULT") || !*s) {
1037 (void)rsignal(i, SIG_DFL);
1043 * We should warn if HINT_STRICT_REFS, but without
1044 * access to a known hint bit in a known OP, we can't
1045 * tell whether HINT_STRICT_REFS is in force or not.
1047 if (!strchr(s,':') && !strchr(s,'\''))
1048 sv_insert(sv, 0, 0, "main::", 6);
1050 (void)rsignal(i, PL_sighandlerp);
1052 *svp = SvREFCNT_inc(sv);
1058 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1060 PL_sub_generation++;
1065 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1067 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1068 PL_amagic_generation++;
1074 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1076 HV *hv = (HV*)LvTARG(sv);
1081 (void) hv_iterinit(hv);
1082 if (! SvTIED_mg((SV*)hv, 'P'))
1086 while (entry = hv_iternext(hv)) {
1092 sv_setiv(sv, (IV)i);
1097 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1100 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1105 /* caller is responsible for stack switching/cleanup */
1107 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1113 PUSHs(SvTIED_obj(sv, mg));
1116 if (mg->mg_len >= 0)
1117 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1118 else if (mg->mg_len == HEf_SVKEY)
1119 PUSHs((SV*)mg->mg_ptr);
1121 else if (mg->mg_type == 'p') {
1122 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1130 return call_method(meth, flags);
1134 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1140 PUSHSTACKi(PERLSI_MAGIC);
1142 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1143 sv_setsv(sv, *PL_stack_sp--);
1153 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1155 magic_methpack(sv,mg,"FETCH");
1157 mg->mg_flags |= MGf_GSKIP;
1162 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1166 PUSHSTACKi(PERLSI_MAGIC);
1167 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1174 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1176 return magic_methpack(sv,mg,"DELETE");
1181 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1188 PUSHSTACKi(PERLSI_MAGIC);
1189 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1190 sv = *PL_stack_sp--;
1191 retval = (U32) SvIV(sv)-1;
1200 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1205 PUSHSTACKi(PERLSI_MAGIC);
1207 XPUSHs(SvTIED_obj(sv, mg));
1209 call_method("CLEAR", G_SCALAR|G_DISCARD);
1216 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1219 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1223 PUSHSTACKi(PERLSI_MAGIC);
1226 PUSHs(SvTIED_obj(sv, mg));
1231 if (call_method(meth, G_SCALAR))
1232 sv_setsv(key, *PL_stack_sp--);
1241 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1243 return magic_methpack(sv,mg,"EXISTS");
1247 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1258 svp = av_fetch(GvAV(gv),
1259 atoi(MgPV(mg,n_a)), FALSE);
1260 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1262 else if (ckWARN_d(WARN_INTERNAL))
1263 Perl_warner(aTHX_ WARN_INTERNAL, "Can't break at that line\n");
1268 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1271 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1276 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1279 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1284 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1286 SV* lsv = LvTARG(sv);
1288 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1289 mg = mg_find(lsv, 'g');
1290 if (mg && mg->mg_len >= 0) {
1294 sv_pos_b2u(lsv, &i);
1295 sv_setiv(sv, i + PL_curcop->cop_arybase);
1304 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1306 SV* lsv = LvTARG(sv);
1314 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1315 mg = mg_find(lsv, 'g');
1319 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1320 mg = mg_find(lsv, 'g');
1322 else if (!SvOK(sv)) {
1326 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1328 pos = SvIV(sv) - PL_curcop->cop_arybase;
1331 ulen = sv_len_utf8(lsv);
1346 sv_pos_u2b(lsv, &p, 0);
1351 mg->mg_flags &= ~MGf_MINMATCH;
1357 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1359 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1361 gv_efullname3(sv,((GV*)sv), "*");
1365 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1370 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1379 if (*s == '*' && s[1])
1381 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1386 GvGP(sv) = gp_ref(GvGP(gv));
1391 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1394 SV *lsv = LvTARG(sv);
1395 char *tmps = SvPV(lsv,len);
1396 I32 offs = LvTARGOFF(sv);
1397 I32 rem = LvTARGLEN(sv);
1401 if (rem + offs > len)
1403 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1408 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1411 char *tmps = SvPV(sv,len);
1412 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1417 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1420 TAINT_IF((mg->mg_len & 1) ||
1421 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1426 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1429 if (PL_localizing) {
1430 if (PL_localizing == 1)
1435 else if (PL_tainted)
1443 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1445 SV *lsv = LvTARG(sv);
1452 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1457 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1459 do_vecset(sv); /* XXX slurp this routine */
1464 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1467 if (LvTARGLEN(sv)) {
1469 SV *ahv = LvTARG(sv);
1470 if (SvTYPE(ahv) == SVt_PVHV) {
1471 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1476 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1482 AV* av = (AV*)LvTARG(sv);
1483 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1484 targ = AvARRAY(av)[LvTARGOFF(sv)];
1486 if (targ && targ != &PL_sv_undef) {
1487 dTHR; /* just for SvREFCNT_dec */
1488 /* somebody else defined it for us */
1489 SvREFCNT_dec(LvTARG(sv));
1490 LvTARG(sv) = SvREFCNT_inc(targ);
1492 SvREFCNT_dec(mg->mg_obj);
1493 mg->mg_obj = Nullsv;
1494 mg->mg_flags &= ~MGf_REFCOUNTED;
1499 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1504 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1509 sv_setsv(LvTARG(sv), sv);
1510 SvSETMAGIC(LvTARG(sv));
1516 Perl_vivify_defelem(pTHX_ SV *sv)
1518 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1522 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1525 SV *ahv = LvTARG(sv);
1527 if (SvTYPE(ahv) == SVt_PVHV) {
1528 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1533 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1537 if (!value || value == &PL_sv_undef)
1538 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1541 AV* av = (AV*)LvTARG(sv);
1542 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1543 LvTARG(sv) = Nullsv; /* array can't be extended */
1545 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1546 if (!svp || (value = *svp) == &PL_sv_undef)
1547 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1550 (void)SvREFCNT_inc(value);
1551 SvREFCNT_dec(LvTARG(sv));
1554 SvREFCNT_dec(mg->mg_obj);
1555 mg->mg_obj = Nullsv;
1556 mg->mg_flags &= ~MGf_REFCOUNTED;
1560 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1562 AV *av = (AV*)mg->mg_obj;
1563 SV **svp = AvARRAY(av);
1564 I32 i = AvFILLp(av);
1566 if (svp[i] && svp[i] != &PL_sv_undef) {
1567 if (!SvWEAKREF(svp[i]))
1568 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1569 /* XXX Should we check that it hasn't changed? */
1572 SvWEAKREF_off(svp[i]);
1573 svp[i] = &PL_sv_undef;
1581 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1589 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1591 sv_unmagic(sv, 'B');
1597 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1599 sv_unmagic(sv, 'f');
1605 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1607 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1609 if (uf && uf->uf_set)
1610 (*uf->uf_set)(uf->uf_index, sv);
1615 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1617 regexp *re = (regexp *)mg->mg_obj;
1622 #ifdef USE_LOCALE_COLLATE
1624 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1627 * RenE<eacute> Descartes said "I think not."
1628 * and vanished with a faint plop.
1631 Safefree(mg->mg_ptr);
1637 #endif /* USE_LOCALE_COLLATE */
1640 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1646 switch (*mg->mg_ptr) {
1647 case '\001': /* ^A */
1648 sv_setsv(PL_bodytarget, sv);
1650 case '\003': /* ^C */
1651 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1654 case '\004': /* ^D */
1655 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1656 DEBUG_x(dump_all());
1658 case '\005': /* ^E */
1659 #ifdef MACOS_TRADITIONAL
1660 gLastMacOSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1663 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1666 SetLastError( SvIV(sv) );
1669 /* will anyone ever use this? */
1670 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1676 case '\006': /* ^F */
1677 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1679 case '\010': /* ^H */
1680 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1682 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1684 Safefree(PL_inplace);
1686 PL_inplace = savepv(SvPV(sv,len));
1688 PL_inplace = Nullch;
1690 case '\017': /* ^O */
1692 Safefree(PL_osname);
1694 PL_osname = savepv(SvPV(sv,len));
1698 case '\020': /* ^P */
1699 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1700 if (PL_perldb && !PL_DBsingle)
1703 case '\024': /* ^T */
1705 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1707 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1710 case '\027': /* ^W & $^Warnings */
1711 if (*(mg->mg_ptr+1) == '\0') {
1712 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1713 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1714 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1715 | (i ? G_WARN_ON : G_WARN_OFF) ;
1718 else if (strEQ(mg->mg_ptr, "\027arnings")) {
1719 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1720 if (memEQ(SvPVX(sv), WARN_ALLstring, WARNsize)) {
1721 PL_compiling.cop_warnings = WARN_ALL;
1722 PL_dowarn |= G_WARN_ONCE ;
1724 else if (memEQ(SvPVX(sv), WARN_NONEstring, WARNsize))
1725 PL_compiling.cop_warnings = WARN_NONE;
1727 if (specialWARN(PL_compiling.cop_warnings))
1728 PL_compiling.cop_warnings = newSVsv(sv) ;
1730 sv_setsv(PL_compiling.cop_warnings, sv);
1731 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1732 PL_dowarn |= G_WARN_ONCE ;
1738 if (PL_localizing) {
1739 if (PL_localizing == 1)
1740 SAVESPTR(PL_last_in_gv);
1742 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1743 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1746 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1747 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1748 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1751 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1752 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1753 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1756 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1759 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1760 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1761 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1764 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1768 IO *io = GvIOp(PL_defoutgv);
1769 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1770 IoFLAGS(io) &= ~IOf_FLUSH;
1772 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1773 PerlIO *ofp = IoOFP(io);
1775 (void)PerlIO_flush(ofp);
1776 IoFLAGS(io) |= IOf_FLUSH;
1782 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1783 PL_multiline = (i != 0);
1786 SvREFCNT_dec(PL_nrs);
1787 PL_nrs = newSVsv(sv);
1788 SvREFCNT_dec(PL_rs);
1789 PL_rs = SvREFCNT_inc(PL_nrs);
1794 if (SvOK(sv) || SvGMAGICAL(sv)) {
1795 s = SvPV(sv,PL_orslen);
1796 PL_ors = savepvn(s,PL_orslen);
1806 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1811 PL_ofmt = savepv(SvPV(sv,len));
1814 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1817 #ifdef COMPLEX_STATUS
1818 if (PL_localizing == 2) {
1819 PL_statusvalue = LvTARGOFF(sv);
1820 PL_statusvalue_vms = LvTARGLEN(sv);
1824 #ifdef VMSISH_STATUS
1826 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1829 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1832 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1833 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1836 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1837 if (PL_delaymagic) {
1838 PL_delaymagic |= DM_RUID;
1839 break; /* don't do magic till later */
1842 (void)setruid((Uid_t)PL_uid);
1845 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1847 #ifdef HAS_SETRESUID
1848 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1850 if (PL_uid == PL_euid) /* special case $< = $> */
1851 (void)PerlProc_setuid(PL_uid);
1853 PL_uid = PerlProc_getuid();
1854 Perl_croak(aTHX_ "setruid() not implemented");
1859 PL_uid = PerlProc_getuid();
1860 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1863 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1864 if (PL_delaymagic) {
1865 PL_delaymagic |= DM_EUID;
1866 break; /* don't do magic till later */
1869 (void)seteuid((Uid_t)PL_euid);
1872 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1874 #ifdef HAS_SETRESUID
1875 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1877 if (PL_euid == PL_uid) /* special case $> = $< */
1878 PerlProc_setuid(PL_euid);
1880 PL_euid = PerlProc_geteuid();
1881 Perl_croak(aTHX_ "seteuid() not implemented");
1886 PL_euid = PerlProc_geteuid();
1887 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1890 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1891 if (PL_delaymagic) {
1892 PL_delaymagic |= DM_RGID;
1893 break; /* don't do magic till later */
1896 (void)setrgid((Gid_t)PL_gid);
1899 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1901 #ifdef HAS_SETRESGID
1902 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1904 if (PL_gid == PL_egid) /* special case $( = $) */
1905 (void)PerlProc_setgid(PL_gid);
1907 PL_gid = PerlProc_getgid();
1908 Perl_croak(aTHX_ "setrgid() not implemented");
1913 PL_gid = PerlProc_getgid();
1914 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1917 #ifdef HAS_SETGROUPS
1919 char *p = SvPV(sv, len);
1920 Groups_t gary[NGROUPS];
1925 for (i = 0; i < NGROUPS; ++i) {
1926 while (*p && !isSPACE(*p))
1935 (void)setgroups(i, gary);
1937 #else /* HAS_SETGROUPS */
1938 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1939 #endif /* HAS_SETGROUPS */
1940 if (PL_delaymagic) {
1941 PL_delaymagic |= DM_EGID;
1942 break; /* don't do magic till later */
1945 (void)setegid((Gid_t)PL_egid);
1948 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1950 #ifdef HAS_SETRESGID
1951 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1953 if (PL_egid == PL_gid) /* special case $) = $( */
1954 (void)PerlProc_setgid(PL_egid);
1956 PL_egid = PerlProc_getegid();
1957 Perl_croak(aTHX_ "setegid() not implemented");
1962 PL_egid = PerlProc_getegid();
1963 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1966 PL_chopset = SvPV_force(sv,len);
1968 #ifndef MACOS_TRADITIONAL
1973 /* See if all the arguments are contiguous in memory */
1974 for (i = 1; i < PL_origargc; i++) {
1975 if (PL_origargv[i] == s + 1
1977 || PL_origargv[i] == s + 2
1982 s += strlen(s); /* this one is ok too */
1987 /* can grab env area too? */
1988 if (PL_origenviron && (PL_origenviron[0] == s + 1
1990 || (PL_origenviron[0] == s + 9 && (s += 8))
1993 my_setenv("NoNe SuCh", Nullch);
1994 /* force copy of environment */
1995 for (i = 0; PL_origenviron[i]; i++)
1996 if (PL_origenviron[i] == s + 1) {
2003 PL_origalen = s - PL_origargv[0];
2005 s = SvPV_force(sv,len);
2007 if (i >= PL_origalen) {
2009 /* don't allow system to limit $0 seen by script */
2010 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2011 Copy(s, PL_origargv[0], i, char);
2012 s = PL_origargv[0]+i;
2016 Copy(s, PL_origargv[0], i, char);
2017 s = PL_origargv[0]+i;
2019 while (++i < PL_origalen)
2021 s = PL_origargv[0]+i;
2022 for (i = 1; i < PL_origargc; i++)
2023 PL_origargv[i] = Nullch;
2029 sv_setsv(thr->errsv, sv);
2031 #endif /* USE_THREADS */
2038 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2041 DEBUG_S(PerlIO_printf(Perl_debug_log,
2042 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2043 PTR2UV(thr), PTR2UV(sv));)
2045 Perl_croak(aTHX_ "panic: magic_mutexfree");
2046 MUTEX_DESTROY(MgMUTEXP(mg));
2047 COND_DESTROY(MgCONDP(mg));
2050 #endif /* USE_THREADS */
2053 Perl_whichsig(pTHX_ char *sig)
2055 register char **sigv;
2057 for (sigv = PL_sig_name+1; *sigv; sigv++)
2058 if (strEQ(sig,*sigv))
2059 return PL_sig_num[sigv - PL_sig_name];
2061 if (strEQ(sig,"CHLD"))
2065 if (strEQ(sig,"CLD"))
2074 Perl_sighandler(int sig)
2080 SV *sv, *tSv = PL_Sv;
2084 I32 o_save_i = PL_savestack_ix, type;
2087 if (PL_savestack_ix + 15 <= PL_savestack_max)
2089 if (PL_markstack_ptr < PL_markstack_max - 2)
2091 if (PL_retstack_ix < PL_retstack_max - 2)
2093 if (PL_scopestack_ix < PL_scopestack_max - 3)
2096 if (!PL_psig_ptr[sig])
2097 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2100 /* Max number of items pushed there is 3*n or 4. We cannot fix
2101 infinity, so we fix 4 (in fact 5): */
2103 PL_savestack_ix += 5; /* Protect save in progress. */
2104 o_save_i = PL_savestack_ix;
2105 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2108 PL_markstack_ptr++; /* Protect mark. */
2111 PL_retstack[PL_retstack_ix] = NULL;
2114 PL_scopestack_ix += 1;
2115 /* sv_2cv is too complicated, try a simpler variant first: */
2116 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2117 || SvTYPE(cv) != SVt_PVCV)
2118 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2120 if (!cv || !CvROOT(cv)) {
2121 if (ckWARN(WARN_SIGNAL))
2122 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2123 PL_sig_name[sig], (gv ? GvENAME(gv)
2130 if(PL_psig_name[sig]) {
2131 sv = SvREFCNT_inc(PL_psig_name[sig]);
2135 sv = sv_newmortal();
2136 sv_setpv(sv,PL_sig_name[sig]);
2139 PUSHSTACKi(PERLSI_SIGNAL);
2144 call_sv((SV*)cv, G_DISCARD);
2149 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2155 PL_scopestack_ix -= 1;
2158 PL_op = myop; /* Apparently not needed... */
2160 PL_Sv = tSv; /* Restore global temporaries. */
2171 restore_magic(pTHXo_ void *p)
2174 MGS* mgs = SSPTR((I32)p, MGS*);
2175 SV* sv = mgs->mgs_sv;
2180 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2183 SvFLAGS(sv) |= mgs->mgs_flags;
2187 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2190 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2192 /* If we're still on top of the stack, pop us off. (That condition
2193 * will be satisfied if restore_magic was called explicitly, but *not*
2194 * if it's being called via leave_scope.)
2195 * The reason for doing this is that otherwise, things like sv_2cv()
2196 * may leave alloc gunk on the savestack, and some code
2197 * (e.g. sighandler) doesn't expect that...
2199 if (PL_savestack_ix == mgs->mgs_ss_ix)
2201 I32 popval = SSPOPINT;
2202 assert(popval == SAVEt_DESTRUCTOR_X);
2203 PL_savestack_ix -= 2;
2205 assert(popval == SAVEt_ALLOC);
2207 PL_savestack_ix -= popval;
2213 unwind_handler_stack(pTHXo_ void *p)
2216 U32 flags = *(U32*)p;
2219 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2220 /* cxstack_ix-- Not needed, die already unwound it. */
2222 SvREFCNT_dec(sig_sv);