3 * Copyright (c) 1991-2000, 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)
344 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
345 if (mg->mg_obj) /* @+ */
348 return rx->lastparen;
355 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
364 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
368 if (paren <= rx->nparens &&
369 (s = rx->startp[paren]) != -1 &&
370 (t = rx->endp[paren]) != -1)
372 if (mg->mg_obj) /* @+ */
383 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
390 switch (*mg->mg_ptr) {
391 case '1': case '2': case '3': case '4':
392 case '5': case '6': case '7': case '8': case '9': case '&':
393 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
396 paren = atoi(mg->mg_ptr);
398 if (paren <= rx->nparens &&
399 (s1 = rx->startp[paren]) != -1 &&
400 (t1 = rx->endp[paren]) != -1)
409 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
410 paren = rx->lastparen;
416 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
417 if (rx->startp[0] != -1) {
425 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
426 if (rx->endp[0] != -1) {
427 i = rx->sublen - rx->endp[0];
434 return (STRLEN)PL_ofslen;
436 return (STRLEN)PL_orslen;
439 if (!SvPOK(sv) && SvNIOK(sv)) {
449 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
457 switch (*mg->mg_ptr) {
458 case '\001': /* ^A */
459 sv_setsv(sv, PL_bodytarget);
461 case '\003': /* ^C */
462 sv_setiv(sv, (IV)PL_minus_c);
465 case '\004': /* ^D */
466 sv_setiv(sv, (IV)(PL_debug & 32767));
467 #if defined(YYDEBUG) && defined(DEBUGGING)
468 PL_yydebug = (PL_debug & 1);
471 case '\005': /* ^E */
472 #ifdef MACOS_TRADITIONAL
476 sv_setnv(sv,(double)gLastMacOSErr);
477 sv_setpv(sv, gLastMacOSErr ? GetSysErrText(gLastMacOSErr, msg) : "");
482 # include <descrip.h>
483 # include <starlet.h>
485 $DESCRIPTOR(msgdsc,msg);
486 sv_setnv(sv,(NV) vaxc$errno);
487 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
488 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
494 if (!(_emx_env & 0x200)) { /* Under DOS */
495 sv_setnv(sv, (NV)errno);
496 sv_setpv(sv, errno ? Strerror(errno) : "");
498 if (errno != errno_isOS2) {
499 int tmp = _syserrno();
500 if (tmp) /* 2nd call to _syserrno() makes it 0 */
503 sv_setnv(sv, (NV)Perl_rc);
504 sv_setpv(sv, os2error(Perl_rc));
509 DWORD dwErr = GetLastError();
510 sv_setnv(sv, (NV)dwErr);
513 PerlProc_GetOSError(sv, dwErr);
520 sv_setnv(sv, (NV)errno);
521 sv_setpv(sv, errno ? Strerror(errno) : "");
526 SvNOK_on(sv); /* what a wonderful hack! */
528 case '\006': /* ^F */
529 sv_setiv(sv, (IV)PL_maxsysfd);
531 case '\010': /* ^H */
532 sv_setiv(sv, (IV)PL_hints);
534 case '\011': /* ^I */ /* NOT \t in EBCDIC */
536 sv_setpv(sv, PL_inplace);
538 sv_setsv(sv, &PL_sv_undef);
540 case '\017': /* ^O */
541 sv_setpv(sv, PL_osname);
543 case '\020': /* ^P */
544 sv_setiv(sv, (IV)PL_perldb);
546 case '\023': /* ^S */
549 if (PL_lex_state != LEX_NOTPARSING)
557 case '\024': /* ^T */
559 sv_setnv(sv, PL_basetime);
561 sv_setiv(sv, (IV)PL_basetime);
564 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
565 if (*(mg->mg_ptr+1) == '\0')
566 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
567 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
568 if (PL_compiling.cop_warnings == pWARN_NONE ||
569 PL_compiling.cop_warnings == pWARN_STD)
571 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
573 else if (PL_compiling.cop_warnings == pWARN_ALL) {
574 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
577 sv_setsv(sv, PL_compiling.cop_warnings);
581 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
582 sv_setiv(sv, (IV)PL_widesyscalls);
584 case '1': case '2': case '3': case '4':
585 case '5': case '6': case '7': case '8': case '9': case '&':
586 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
590 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
591 * XXX Does the new way break anything?
593 paren = atoi(mg->mg_ptr);
595 if (paren <= rx->nparens &&
596 (s1 = rx->startp[paren]) != -1 &&
597 (t1 = rx->endp[paren]) != -1)
605 was_tainted = PL_tainted;
609 if ((PL_curpm->op_pmdynflags & PMdf_UTF8) && !IN_BYTE)
614 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
619 sv_setsv(sv,&PL_sv_undef);
622 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
623 paren = rx->lastparen;
627 sv_setsv(sv,&PL_sv_undef);
630 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
631 if ((s = rx->subbeg) && rx->startp[0] != -1) {
636 sv_setsv(sv,&PL_sv_undef);
639 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
640 if (rx->subbeg && rx->endp[0] != -1) {
641 s = rx->subbeg + rx->endp[0];
642 i = rx->sublen - rx->endp[0];
646 sv_setsv(sv,&PL_sv_undef);
650 if (GvIO(PL_last_in_gv)) {
651 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
657 sv_setiv(sv, (IV)STATUS_CURRENT);
658 #ifdef COMPLEX_STATUS
659 LvTARGOFF(sv) = PL_statusvalue;
660 LvTARGLEN(sv) = PL_statusvalue_vms;
665 s = IoTOP_NAME(GvIOp(PL_defoutgv));
669 sv_setpv(sv,GvENAME(PL_defoutgv));
674 s = IoFMT_NAME(GvIOp(PL_defoutgv));
676 s = GvENAME(PL_defoutgv);
681 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
684 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
687 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
695 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
698 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
701 sv_setpvn(sv,PL_ofs,PL_ofslen);
704 sv_setpvn(sv,PL_ors,PL_orslen);
707 sv_setpv(sv,PL_ofmt);
711 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
712 sv_setpv(sv, errno ? Strerror(errno) : "");
715 int saveerrno = errno;
716 sv_setnv(sv, (NV)errno);
718 if (errno == errno_isOS2 || errno == errno_isOS2_set)
719 sv_setpv(sv, os2error(Perl_rc));
722 sv_setpv(sv, errno ? Strerror(errno) : "");
726 SvNOK_on(sv); /* what a wonderful hack! */
729 sv_setiv(sv, (IV)PL_uid);
732 sv_setiv(sv, (IV)PL_euid);
735 sv_setiv(sv, (IV)PL_gid);
737 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
741 sv_setiv(sv, (IV)PL_egid);
743 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
748 Groups_t gary[NGROUPS];
749 i = getgroups(NGROUPS,gary);
751 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
754 (void)SvIOK_on(sv); /* what a wonderful hack! */
758 #ifndef MACOS_TRADITIONAL
764 sv_setsv(sv, thr->errsv);
766 #endif /* USE_THREADS */
772 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
774 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
776 if (uf && uf->uf_val)
777 (*uf->uf_val)(uf->uf_index, sv);
782 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
793 #ifdef DYNAMIC_ENV_FETCH
794 /* We just undefd an environment var. Is a replacement */
795 /* waiting in the wings? */
798 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
799 s = SvPV(*valp, len);
803 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
804 /* And you'll never guess what the dog had */
805 /* in its mouth... */
807 MgTAINTEDDIR_off(mg);
809 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
810 char pathbuf[256], eltbuf[256], *cp, *elt = s;
814 do { /* DCL$PATH may be a search list */
815 while (1) { /* as may dev portion of any element */
816 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
817 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
818 cando_by_name(S_IWUSR,0,elt) ) {
823 if ((cp = strchr(elt, ':')) != Nullch)
825 if (my_trnlnm(elt, eltbuf, j++))
831 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
834 if (s && klen == 4 && strEQ(ptr,"PATH")) {
835 char *strend = s + len;
840 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
843 if (i >= sizeof tmpbuf /* too long -- assume the worst */
845 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
852 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
858 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
861 my_setenv(MgPV(mg,n_a),Nullch);
866 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
869 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
875 magic_clear_all_env(sv,mg);
876 hv_iterinit((HV*)sv);
877 while ((entry = hv_iternext((HV*)sv))) {
879 my_setenv(hv_iterkey(entry, &keylen),
880 SvPV(hv_iterval((HV*)sv, entry), n_a));
888 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
891 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
893 # ifdef PERL_IMPLICIT_SYS
897 char *envv = GetEnvironmentStrings();
901 char *end = strchr(cur,'=');
902 if (end && end != cur) {
904 my_setenv(cur,Nullch);
906 cur = end + strlen(end+1)+2;
908 else if ((len = strlen(cur)))
911 FreeEnvironmentStrings(envv);
915 for (i = 0; environ[i]; i++)
916 safesysfree(environ[i]);
918 # ifndef PERL_USE_SAFE_PUTENV
921 if (environ == PL_origenviron)
922 environ = (char**)safesysmalloc(sizeof(char*));
924 for (i = 0; environ[i]; i++)
925 safesysfree(environ[i]);
926 # endif /* PERL_USE_SAFE_PUTENV */
927 # endif /* __CYGWIN__ */
932 # endif /* PERL_IMPLICIT_SYS */
938 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
942 /* Are we fetching a signal entry? */
943 i = whichsig(MgPV(mg,n_a));
946 sv_setsv(sv,PL_psig_ptr[i]);
948 Sighandler_t sigstate = rsignal_state(i);
950 /* cache state so we don't fetch it again */
951 if(sigstate == SIG_IGN)
952 sv_setpv(sv,"IGNORE");
954 sv_setsv(sv,&PL_sv_undef);
955 PL_psig_ptr[i] = SvREFCNT_inc(sv);
962 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
966 /* Are we clearing a signal entry? */
967 i = whichsig(MgPV(mg,n_a));
970 SvREFCNT_dec(PL_psig_ptr[i]);
973 if(PL_psig_name[i]) {
974 SvREFCNT_dec(PL_psig_name[i]);
982 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
992 if (strEQ(s,"__DIE__"))
994 else if (strEQ(s,"__WARN__"))
997 Perl_croak(aTHX_ "No such hook: %s", s);
1005 i = whichsig(s); /* ...no, a brick */
1007 if (ckWARN(WARN_SIGNAL))
1008 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1011 SvREFCNT_dec(PL_psig_name[i]);
1012 SvREFCNT_dec(PL_psig_ptr[i]);
1013 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1014 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1015 PL_psig_name[i] = newSVpvn(s, len);
1016 SvREADONLY_on(PL_psig_name[i]);
1018 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1020 (void)rsignal(i, PL_sighandlerp);
1022 *svp = SvREFCNT_inc(sv);
1025 s = SvPV_force(sv,len);
1026 if (strEQ(s,"IGNORE")) {
1028 (void)rsignal(i, SIG_IGN);
1032 else if (strEQ(s,"DEFAULT") || !*s) {
1034 (void)rsignal(i, SIG_DFL);
1040 * We should warn if HINT_STRICT_REFS, but without
1041 * access to a known hint bit in a known OP, we can't
1042 * tell whether HINT_STRICT_REFS is in force or not.
1044 if (!strchr(s,':') && !strchr(s,'\''))
1045 sv_insert(sv, 0, 0, "main::", 6);
1047 (void)rsignal(i, PL_sighandlerp);
1049 *svp = SvREFCNT_inc(sv);
1055 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1057 PL_sub_generation++;
1062 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1064 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1065 PL_amagic_generation++;
1071 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1073 HV *hv = (HV*)LvTARG(sv);
1078 (void) hv_iterinit(hv);
1079 if (! SvTIED_mg((SV*)hv, 'P'))
1083 while ((entry = hv_iternext(hv))) {
1089 sv_setiv(sv, (IV)i);
1094 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1097 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1102 /* caller is responsible for stack switching/cleanup */
1104 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1110 PUSHs(SvTIED_obj(sv, mg));
1113 if (mg->mg_len >= 0)
1114 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1115 else if (mg->mg_len == HEf_SVKEY)
1116 PUSHs((SV*)mg->mg_ptr);
1118 else if (mg->mg_type == 'p') {
1119 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1127 return call_method(meth, flags);
1131 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1137 PUSHSTACKi(PERLSI_MAGIC);
1139 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1140 sv_setsv(sv, *PL_stack_sp--);
1150 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1152 magic_methpack(sv,mg,"FETCH");
1154 mg->mg_flags |= MGf_GSKIP;
1159 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1163 PUSHSTACKi(PERLSI_MAGIC);
1164 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1171 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1173 return magic_methpack(sv,mg,"DELETE");
1178 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1185 PUSHSTACKi(PERLSI_MAGIC);
1186 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1187 sv = *PL_stack_sp--;
1188 retval = (U32) SvIV(sv)-1;
1197 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1202 PUSHSTACKi(PERLSI_MAGIC);
1204 XPUSHs(SvTIED_obj(sv, mg));
1206 call_method("CLEAR", G_SCALAR|G_DISCARD);
1213 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1216 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1220 PUSHSTACKi(PERLSI_MAGIC);
1223 PUSHs(SvTIED_obj(sv, mg));
1228 if (call_method(meth, G_SCALAR))
1229 sv_setsv(key, *PL_stack_sp--);
1238 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1240 return magic_methpack(sv,mg,"EXISTS");
1244 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1255 svp = av_fetch(GvAV(gv),
1256 atoi(MgPV(mg,n_a)), FALSE);
1257 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1259 else if (ckWARN_d(WARN_INTERNAL))
1260 Perl_warner(aTHX_ WARN_INTERNAL, "Can't break at that line\n");
1265 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1268 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1273 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1276 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1281 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1283 SV* lsv = LvTARG(sv);
1285 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1286 mg = mg_find(lsv, 'g');
1287 if (mg && mg->mg_len >= 0) {
1291 sv_pos_b2u(lsv, &i);
1292 sv_setiv(sv, i + PL_curcop->cop_arybase);
1301 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1303 SV* lsv = LvTARG(sv);
1311 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1312 mg = mg_find(lsv, 'g');
1316 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1317 mg = mg_find(lsv, 'g');
1319 else if (!SvOK(sv)) {
1323 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1325 pos = SvIV(sv) - PL_curcop->cop_arybase;
1328 ulen = sv_len_utf8(lsv);
1343 sv_pos_u2b(lsv, &p, 0);
1348 mg->mg_flags &= ~MGf_MINMATCH;
1354 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1356 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1358 gv_efullname3(sv,((GV*)sv), "*");
1362 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1367 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1376 if (*s == '*' && s[1])
1378 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1383 GvGP(sv) = gp_ref(GvGP(gv));
1388 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1391 SV *lsv = LvTARG(sv);
1392 char *tmps = SvPV(lsv,len);
1393 I32 offs = LvTARGOFF(sv);
1394 I32 rem = LvTARGLEN(sv);
1398 if (rem + offs > len)
1400 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1405 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1408 char *tmps = SvPV(sv,len);
1409 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1414 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1417 TAINT_IF((mg->mg_len & 1) ||
1418 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1423 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1426 if (PL_localizing) {
1427 if (PL_localizing == 1)
1432 else if (PL_tainted)
1440 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1442 SV *lsv = LvTARG(sv);
1449 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1454 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1456 do_vecset(sv); /* XXX slurp this routine */
1461 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1464 if (LvTARGLEN(sv)) {
1466 SV *ahv = LvTARG(sv);
1467 if (SvTYPE(ahv) == SVt_PVHV) {
1468 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1473 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1479 AV* av = (AV*)LvTARG(sv);
1480 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1481 targ = AvARRAY(av)[LvTARGOFF(sv)];
1483 if (targ && targ != &PL_sv_undef) {
1484 dTHR; /* just for SvREFCNT_dec */
1485 /* somebody else defined it for us */
1486 SvREFCNT_dec(LvTARG(sv));
1487 LvTARG(sv) = SvREFCNT_inc(targ);
1489 SvREFCNT_dec(mg->mg_obj);
1490 mg->mg_obj = Nullsv;
1491 mg->mg_flags &= ~MGf_REFCOUNTED;
1496 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1501 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1506 sv_setsv(LvTARG(sv), sv);
1507 SvSETMAGIC(LvTARG(sv));
1513 Perl_vivify_defelem(pTHX_ SV *sv)
1515 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1519 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1522 SV *ahv = LvTARG(sv);
1524 if (SvTYPE(ahv) == SVt_PVHV) {
1525 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1530 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1534 if (!value || value == &PL_sv_undef)
1535 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1538 AV* av = (AV*)LvTARG(sv);
1539 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1540 LvTARG(sv) = Nullsv; /* array can't be extended */
1542 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1543 if (!svp || (value = *svp) == &PL_sv_undef)
1544 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1547 (void)SvREFCNT_inc(value);
1548 SvREFCNT_dec(LvTARG(sv));
1551 SvREFCNT_dec(mg->mg_obj);
1552 mg->mg_obj = Nullsv;
1553 mg->mg_flags &= ~MGf_REFCOUNTED;
1557 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1559 AV *av = (AV*)mg->mg_obj;
1560 SV **svp = AvARRAY(av);
1561 I32 i = AvFILLp(av);
1563 if (svp[i] && svp[i] != &PL_sv_undef) {
1564 if (!SvWEAKREF(svp[i]))
1565 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1566 /* XXX Should we check that it hasn't changed? */
1568 (void)SvOK_off(svp[i]);
1569 SvWEAKREF_off(svp[i]);
1570 svp[i] = &PL_sv_undef;
1578 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1586 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1588 sv_unmagic(sv, 'B');
1594 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1596 sv_unmagic(sv, 'f');
1602 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1604 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1606 if (uf && uf->uf_set)
1607 (*uf->uf_set)(uf->uf_index, sv);
1612 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1614 regexp *re = (regexp *)mg->mg_obj;
1619 #ifdef USE_LOCALE_COLLATE
1621 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1624 * RenE<eacute> Descartes said "I think not."
1625 * and vanished with a faint plop.
1628 Safefree(mg->mg_ptr);
1634 #endif /* USE_LOCALE_COLLATE */
1637 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1643 switch (*mg->mg_ptr) {
1644 case '\001': /* ^A */
1645 sv_setsv(PL_bodytarget, sv);
1647 case '\003': /* ^C */
1648 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1651 case '\004': /* ^D */
1652 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1653 DEBUG_x(dump_all());
1655 case '\005': /* ^E */
1656 #ifdef MACOS_TRADITIONAL
1657 gLastMacOSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1660 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1663 SetLastError( SvIV(sv) );
1666 /* will anyone ever use this? */
1667 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1673 case '\006': /* ^F */
1674 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1676 case '\010': /* ^H */
1677 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1679 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1681 Safefree(PL_inplace);
1683 PL_inplace = savepv(SvPV(sv,len));
1685 PL_inplace = Nullch;
1687 case '\017': /* ^O */
1689 Safefree(PL_osname);
1691 PL_osname = savepv(SvPV(sv,len));
1695 case '\020': /* ^P */
1696 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1697 if (PL_perldb && !PL_DBsingle)
1700 case '\024': /* ^T */
1702 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1704 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1707 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1708 if (*(mg->mg_ptr+1) == '\0') {
1709 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1710 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1711 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1712 | (i ? G_WARN_ON : G_WARN_OFF) ;
1715 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1716 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1717 if (!SvPOK(sv) && PL_localizing) {
1718 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1719 PL_compiling.cop_warnings = pWARN_NONE;
1722 if (isWARN_on(sv, WARN_ALL)) {
1723 PL_compiling.cop_warnings = pWARN_ALL;
1724 PL_dowarn |= G_WARN_ONCE ;
1728 int accumulate = 0 ;
1729 char * ptr = (char*)SvPV(sv, len) ;
1730 for (i = 0 ; i < len ; ++i)
1731 accumulate += ptr[i] ;
1733 PL_compiling.cop_warnings = pWARN_NONE;
1735 if (specialWARN(PL_compiling.cop_warnings))
1736 PL_compiling.cop_warnings = newSVsv(sv) ;
1738 sv_setsv(PL_compiling.cop_warnings, sv);
1739 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1740 PL_dowarn |= G_WARN_ONCE ;
1745 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1746 PL_widesyscalls = SvTRUE(sv);
1749 if (PL_localizing) {
1750 if (PL_localizing == 1)
1751 SAVESPTR(PL_last_in_gv);
1753 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1754 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1757 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1758 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1759 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1762 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1763 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1764 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1767 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1770 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1771 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1772 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1775 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1779 IO *io = GvIOp(PL_defoutgv);
1780 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1781 IoFLAGS(io) &= ~IOf_FLUSH;
1783 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1784 PerlIO *ofp = IoOFP(io);
1786 (void)PerlIO_flush(ofp);
1787 IoFLAGS(io) |= IOf_FLUSH;
1793 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1794 PL_multiline = (i != 0);
1797 SvREFCNT_dec(PL_nrs);
1798 PL_nrs = newSVsv(sv);
1799 SvREFCNT_dec(PL_rs);
1800 PL_rs = SvREFCNT_inc(PL_nrs);
1805 if (SvOK(sv) || SvGMAGICAL(sv)) {
1806 s = SvPV(sv,PL_orslen);
1807 PL_ors = savepvn(s,PL_orslen);
1817 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1822 PL_ofmt = savepv(SvPV(sv,len));
1825 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1828 #ifdef COMPLEX_STATUS
1829 if (PL_localizing == 2) {
1830 PL_statusvalue = LvTARGOFF(sv);
1831 PL_statusvalue_vms = LvTARGLEN(sv);
1835 #ifdef VMSISH_STATUS
1837 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1840 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1843 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1844 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1847 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1848 if (PL_delaymagic) {
1849 PL_delaymagic |= DM_RUID;
1850 break; /* don't do magic till later */
1853 (void)setruid((Uid_t)PL_uid);
1856 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1858 #ifdef HAS_SETRESUID
1859 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1861 if (PL_uid == PL_euid) /* special case $< = $> */
1862 (void)PerlProc_setuid(PL_uid);
1864 PL_uid = PerlProc_getuid();
1865 Perl_croak(aTHX_ "setruid() not implemented");
1870 PL_uid = PerlProc_getuid();
1871 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1874 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1875 if (PL_delaymagic) {
1876 PL_delaymagic |= DM_EUID;
1877 break; /* don't do magic till later */
1880 (void)seteuid((Uid_t)PL_euid);
1883 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1885 #ifdef HAS_SETRESUID
1886 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1888 if (PL_euid == PL_uid) /* special case $> = $< */
1889 PerlProc_setuid(PL_euid);
1891 PL_euid = PerlProc_geteuid();
1892 Perl_croak(aTHX_ "seteuid() not implemented");
1897 PL_euid = PerlProc_geteuid();
1898 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1901 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1902 if (PL_delaymagic) {
1903 PL_delaymagic |= DM_RGID;
1904 break; /* don't do magic till later */
1907 (void)setrgid((Gid_t)PL_gid);
1910 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1912 #ifdef HAS_SETRESGID
1913 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1915 if (PL_gid == PL_egid) /* special case $( = $) */
1916 (void)PerlProc_setgid(PL_gid);
1918 PL_gid = PerlProc_getgid();
1919 Perl_croak(aTHX_ "setrgid() not implemented");
1924 PL_gid = PerlProc_getgid();
1925 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1928 #ifdef HAS_SETGROUPS
1930 char *p = SvPV(sv, len);
1931 Groups_t gary[NGROUPS];
1936 for (i = 0; i < NGROUPS; ++i) {
1937 while (*p && !isSPACE(*p))
1946 (void)setgroups(i, gary);
1948 #else /* HAS_SETGROUPS */
1949 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1950 #endif /* HAS_SETGROUPS */
1951 if (PL_delaymagic) {
1952 PL_delaymagic |= DM_EGID;
1953 break; /* don't do magic till later */
1956 (void)setegid((Gid_t)PL_egid);
1959 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1961 #ifdef HAS_SETRESGID
1962 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1964 if (PL_egid == PL_gid) /* special case $) = $( */
1965 (void)PerlProc_setgid(PL_egid);
1967 PL_egid = PerlProc_getegid();
1968 Perl_croak(aTHX_ "setegid() not implemented");
1973 PL_egid = PerlProc_getegid();
1974 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1977 PL_chopset = SvPV_force(sv,len);
1979 #ifndef MACOS_TRADITIONAL
1984 /* See if all the arguments are contiguous in memory */
1985 for (i = 1; i < PL_origargc; i++) {
1986 if (PL_origargv[i] == s + 1
1988 || PL_origargv[i] == s + 2
1993 s += strlen(s); /* this one is ok too */
1998 /* can grab env area too? */
1999 if (PL_origenviron && (PL_origenviron[0] == s + 1
2001 || (PL_origenviron[0] == s + 9 && (s += 8))
2004 my_setenv("NoNe SuCh", Nullch);
2005 /* force copy of environment */
2006 for (i = 0; PL_origenviron[i]; i++)
2007 if (PL_origenviron[i] == s + 1) {
2014 PL_origalen = s - PL_origargv[0];
2016 s = SvPV_force(sv,len);
2018 if (i >= PL_origalen) {
2020 /* don't allow system to limit $0 seen by script */
2021 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2022 Copy(s, PL_origargv[0], i, char);
2023 s = PL_origargv[0]+i;
2027 Copy(s, PL_origargv[0], i, char);
2028 s = PL_origargv[0]+i;
2030 while (++i < PL_origalen)
2032 s = PL_origargv[0]+i;
2033 for (i = 1; i < PL_origargc; i++)
2034 PL_origargv[i] = Nullch;
2040 sv_setsv(thr->errsv, sv);
2042 #endif /* USE_THREADS */
2049 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2052 DEBUG_S(PerlIO_printf(Perl_debug_log,
2053 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2054 PTR2UV(thr), PTR2UV(sv));)
2056 Perl_croak(aTHX_ "panic: magic_mutexfree");
2057 MUTEX_DESTROY(MgMUTEXP(mg));
2058 COND_DESTROY(MgCONDP(mg));
2061 #endif /* USE_THREADS */
2064 Perl_whichsig(pTHX_ char *sig)
2066 register char **sigv;
2068 for (sigv = PL_sig_name+1; *sigv; sigv++)
2069 if (strEQ(sig,*sigv))
2070 return PL_sig_num[sigv - PL_sig_name];
2072 if (strEQ(sig,"CHLD"))
2076 if (strEQ(sig,"CLD"))
2085 Perl_sighandler(int sig)
2091 SV *sv, *tSv = PL_Sv;
2095 I32 o_save_i = PL_savestack_ix;
2098 if (PL_savestack_ix + 15 <= PL_savestack_max)
2100 if (PL_markstack_ptr < PL_markstack_max - 2)
2102 if (PL_retstack_ix < PL_retstack_max - 2)
2104 if (PL_scopestack_ix < PL_scopestack_max - 3)
2107 if (!PL_psig_ptr[sig])
2108 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2111 /* Max number of items pushed there is 3*n or 4. We cannot fix
2112 infinity, so we fix 4 (in fact 5): */
2114 PL_savestack_ix += 5; /* Protect save in progress. */
2115 o_save_i = PL_savestack_ix;
2116 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2119 PL_markstack_ptr++; /* Protect mark. */
2122 PL_retstack[PL_retstack_ix] = NULL;
2125 PL_scopestack_ix += 1;
2126 /* sv_2cv is too complicated, try a simpler variant first: */
2127 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2128 || SvTYPE(cv) != SVt_PVCV)
2129 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2131 if (!cv || !CvROOT(cv)) {
2132 if (ckWARN(WARN_SIGNAL))
2133 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2134 PL_sig_name[sig], (gv ? GvENAME(gv)
2141 if(PL_psig_name[sig]) {
2142 sv = SvREFCNT_inc(PL_psig_name[sig]);
2146 sv = sv_newmortal();
2147 sv_setpv(sv,PL_sig_name[sig]);
2150 PUSHSTACKi(PERLSI_SIGNAL);
2155 call_sv((SV*)cv, G_DISCARD);
2160 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2166 PL_scopestack_ix -= 1;
2169 PL_op = myop; /* Apparently not needed... */
2171 PL_Sv = tSv; /* Restore global temporaries. */
2182 restore_magic(pTHXo_ void *p)
2185 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2186 SV* sv = mgs->mgs_sv;
2191 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2194 SvFLAGS(sv) |= mgs->mgs_flags;
2198 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2201 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2203 /* If we're still on top of the stack, pop us off. (That condition
2204 * will be satisfied if restore_magic was called explicitly, but *not*
2205 * if it's being called via leave_scope.)
2206 * The reason for doing this is that otherwise, things like sv_2cv()
2207 * may leave alloc gunk on the savestack, and some code
2208 * (e.g. sighandler) doesn't expect that...
2210 if (PL_savestack_ix == mgs->mgs_ss_ix)
2212 I32 popval = SSPOPINT;
2213 assert(popval == SAVEt_DESTRUCTOR_X);
2214 PL_savestack_ix -= 2;
2216 assert(popval == SAVEt_ALLOC);
2218 PL_savestack_ix -= popval;
2224 unwind_handler_stack(pTHXo_ void *p)
2227 U32 flags = *(U32*)p;
2230 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2231 /* cxstack_ix-- Not needed, die already unwound it. */
2233 SvREFCNT_dec(sig_sv);