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 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
25 static void restore_magic(pTHXo_ void *p);
26 static void unwind_handler_stack(pTHXo_ void *p);
29 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
37 /* MGS is typedef'ed to struct magic_state in perl.h */
40 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
44 assert(SvMAGICAL(sv));
46 SAVEDESTRUCTOR_X(restore_magic, (void*)mgs_ix);
48 mgs = SSPTR(mgs_ix, MGS*);
50 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
51 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
55 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
59 =for apidoc mg_magical
61 Turns on the magical status of an SV. See C<sv_magic>.
67 Perl_mg_magical(pTHX_ SV *sv)
70 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
71 MGVTBL* vtbl = mg->mg_virtual;
73 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
77 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
86 Do magic after a value is retrieved from the SV. See C<sv_magic>.
92 Perl_mg_get(pTHX_ SV *sv)
100 mgs_ix = SSNEW(sizeof(MGS));
101 save_magic(mgs_ix, sv);
104 while ((mg = *mgp) != 0) {
105 MGVTBL* vtbl = mg->mg_virtual;
106 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
107 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
108 /* Ignore this magic if it's been deleted */
109 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
110 (mg->mg_flags & MGf_GSKIP))
111 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
113 /* Advance to next magic (complicated by possible deletion) */
114 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
115 mgp = &mg->mg_moremagic;
119 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
122 restore_magic(aTHXo_ (void*)mgs_ix);
129 Do magic after a value is assigned to the SV. See C<sv_magic>.
135 Perl_mg_set(pTHX_ SV *sv)
142 mgs_ix = SSNEW(sizeof(MGS));
143 save_magic(mgs_ix, sv);
145 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
146 MGVTBL* vtbl = mg->mg_virtual;
147 nextmg = mg->mg_moremagic; /* it may delete itself */
148 if (mg->mg_flags & MGf_GSKIP) {
149 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
150 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
152 if (vtbl && vtbl->svt_set)
153 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
156 restore_magic(aTHXo_ (void*)mgs_ix);
161 =for apidoc mg_length
163 Report on the SV's length. See C<sv_magic>.
169 Perl_mg_length(pTHX_ SV *sv)
175 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
176 MGVTBL* vtbl = mg->mg_virtual;
177 if (vtbl && vtbl->svt_len) {
180 mgs_ix = SSNEW(sizeof(MGS));
181 save_magic(mgs_ix, sv);
182 /* omit MGf_GSKIP -- not changed here */
183 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
184 restore_magic(aTHXo_ (void*)mgs_ix);
189 junk = SvPV(sv, len);
194 Perl_mg_size(pTHX_ SV *sv)
199 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
200 MGVTBL* vtbl = mg->mg_virtual;
201 if (vtbl && vtbl->svt_len) {
204 mgs_ix = SSNEW(sizeof(MGS));
205 save_magic(mgs_ix, sv);
206 /* omit MGf_GSKIP -- not changed here */
207 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
208 restore_magic(aTHXo_ (void*)mgs_ix);
215 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
220 Perl_croak(aTHX_ "Size magic not implemented");
229 Clear something magical that the SV represents. See C<sv_magic>.
235 Perl_mg_clear(pTHX_ SV *sv)
240 mgs_ix = SSNEW(sizeof(MGS));
241 save_magic(mgs_ix, sv);
243 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
244 MGVTBL* vtbl = mg->mg_virtual;
245 /* omit GSKIP -- never set here */
247 if (vtbl && vtbl->svt_clear)
248 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
251 restore_magic(aTHXo_ (void*)mgs_ix);
258 Finds the magic pointer for type matching the SV. See C<sv_magic>.
264 Perl_mg_find(pTHX_ SV *sv, int type)
267 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
268 if (mg->mg_type == type)
277 Copies the magic from one SV to another. See C<sv_magic>.
283 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
287 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
288 if (isUPPER(mg->mg_type)) {
290 mg->mg_type == 'P' ? SvTIED_obj(sv, mg) :
291 (mg->mg_type == 'D' && mg->mg_obj) ? sv : mg->mg_obj,
292 toLOWER(mg->mg_type), key, klen);
302 Free any magic storage used by the SV. See C<sv_magic>.
308 Perl_mg_free(pTHX_ SV *sv)
312 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
313 MGVTBL* vtbl = mg->mg_virtual;
314 moremagic = mg->mg_moremagic;
315 if (vtbl && vtbl->svt_free)
316 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
317 if (mg->mg_ptr && mg->mg_type != 'g')
319 Safefree(mg->mg_ptr);
320 else if (mg->mg_len == HEf_SVKEY)
321 SvREFCNT_dec((SV*)mg->mg_ptr);
322 if (mg->mg_flags & MGf_REFCOUNTED)
323 SvREFCNT_dec(mg->mg_obj);
330 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
335 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
340 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
341 if (mg->mg_obj) /* @+ */
344 return rx->lastparen;
351 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
360 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
364 if (paren <= rx->nparens &&
365 (s = rx->startp[paren]) != -1 &&
366 (t = rx->endp[paren]) != -1)
368 if (mg->mg_obj) /* @+ */
379 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
382 Perl_croak(aTHX_ PL_no_modify);
388 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
396 switch (*mg->mg_ptr) {
397 case '1': case '2': case '3': case '4':
398 case '5': case '6': case '7': case '8': case '9': case '&':
399 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)
409 if (i > 0 && (PL_curpm->op_pmdynflags & PMdf_UTF8) && !IN_BYTE) {
410 char *s = rx->subbeg + s1;
411 char *send = rx->subbeg + t1;
424 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
425 paren = rx->lastparen;
431 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
432 if (rx->startp[0] != -1) {
443 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
444 if (rx->endp[0] != -1) {
445 i = rx->sublen - rx->endp[0];
455 return (STRLEN)PL_ofslen;
457 return (STRLEN)PL_orslen;
460 if (!SvPOK(sv) && SvNIOK(sv)) {
470 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
478 switch (*mg->mg_ptr) {
479 case '\001': /* ^A */
480 sv_setsv(sv, PL_bodytarget);
482 case '\003': /* ^C */
483 sv_setiv(sv, (IV)PL_minus_c);
486 case '\004': /* ^D */
487 sv_setiv(sv, (IV)(PL_debug & 32767));
488 #if defined(YYDEBUG) && defined(DEBUGGING)
489 PL_yydebug = (PL_debug & 1);
492 case '\005': /* ^E */
493 #ifdef MACOS_TRADITIONAL
497 sv_setnv(sv,(double)gMacPerl_OSErr);
498 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
503 # include <descrip.h>
504 # include <starlet.h>
506 $DESCRIPTOR(msgdsc,msg);
507 sv_setnv(sv,(NV) vaxc$errno);
508 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
509 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
515 if (!(_emx_env & 0x200)) { /* Under DOS */
516 sv_setnv(sv, (NV)errno);
517 sv_setpv(sv, errno ? Strerror(errno) : "");
519 if (errno != errno_isOS2) {
520 int tmp = _syserrno();
521 if (tmp) /* 2nd call to _syserrno() makes it 0 */
524 sv_setnv(sv, (NV)Perl_rc);
525 sv_setpv(sv, os2error(Perl_rc));
530 DWORD dwErr = GetLastError();
531 sv_setnv(sv, (NV)dwErr);
534 PerlProc_GetOSError(sv, dwErr);
541 sv_setnv(sv, (NV)errno);
542 sv_setpv(sv, errno ? Strerror(errno) : "");
547 SvNOK_on(sv); /* what a wonderful hack! */
549 case '\006': /* ^F */
550 sv_setiv(sv, (IV)PL_maxsysfd);
552 case '\010': /* ^H */
553 sv_setiv(sv, (IV)PL_hints);
555 case '\011': /* ^I */ /* NOT \t in EBCDIC */
557 sv_setpv(sv, PL_inplace);
559 sv_setsv(sv, &PL_sv_undef);
561 case '\017': /* ^O & ^OPEN */
562 if (*(mg->mg_ptr+1) == '\0')
563 sv_setpv(sv, PL_osname);
564 else if (strEQ(mg->mg_ptr, "\017PEN")) {
565 if (!PL_compiling.cop_io)
566 sv_setsv(sv, &PL_sv_undef);
568 sv_setsv(sv, PL_compiling.cop_io);
572 case '\020': /* ^P */
573 sv_setiv(sv, (IV)PL_perldb);
575 case '\023': /* ^S */
578 if (PL_lex_state != LEX_NOTPARSING)
581 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
584 case '\024': /* ^T */
586 sv_setnv(sv, PL_basetime);
588 sv_setiv(sv, (IV)PL_basetime);
591 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
592 if (*(mg->mg_ptr+1) == '\0')
593 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
594 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
595 if (PL_compiling.cop_warnings == pWARN_NONE ||
596 PL_compiling.cop_warnings == pWARN_STD)
598 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
600 else if (PL_compiling.cop_warnings == pWARN_ALL) {
601 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
604 sv_setsv(sv, PL_compiling.cop_warnings);
608 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
609 sv_setiv(sv, (IV)PL_widesyscalls);
611 case '1': case '2': case '3': case '4':
612 case '5': case '6': case '7': case '8': case '9': case '&':
613 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
617 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
618 * XXX Does the new way break anything?
620 paren = atoi(mg->mg_ptr);
622 if (paren <= rx->nparens &&
623 (s1 = rx->startp[paren]) != -1 &&
624 (t1 = rx->endp[paren]) != -1)
635 was_tainted = PL_tainted;
639 if ((PL_curpm->op_pmdynflags & PMdf_UTF8) && !IN_BYTE)
644 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
649 sv_setsv(sv,&PL_sv_undef);
652 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
653 paren = rx->lastparen;
657 sv_setsv(sv,&PL_sv_undef);
660 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
661 if ((s = rx->subbeg) && rx->startp[0] != -1) {
666 sv_setsv(sv,&PL_sv_undef);
669 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
670 if (rx->subbeg && rx->endp[0] != -1) {
671 s = rx->subbeg + rx->endp[0];
672 i = rx->sublen - rx->endp[0];
676 sv_setsv(sv,&PL_sv_undef);
680 if (GvIO(PL_last_in_gv)) {
681 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
687 sv_setiv(sv, (IV)STATUS_CURRENT);
688 #ifdef COMPLEX_STATUS
689 LvTARGOFF(sv) = PL_statusvalue;
690 LvTARGLEN(sv) = PL_statusvalue_vms;
695 s = IoTOP_NAME(GvIOp(PL_defoutgv));
699 sv_setpv(sv,GvENAME(PL_defoutgv));
704 s = IoFMT_NAME(GvIOp(PL_defoutgv));
706 s = GvENAME(PL_defoutgv);
711 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
714 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
717 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
725 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
728 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
731 sv_setpvn(sv,PL_ofs,PL_ofslen);
734 sv_setpvn(sv,PL_ors,PL_orslen);
737 sv_setpv(sv,PL_ofmt);
741 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
742 sv_setpv(sv, errno ? Strerror(errno) : "");
745 int saveerrno = errno;
746 sv_setnv(sv, (NV)errno);
748 if (errno == errno_isOS2 || errno == errno_isOS2_set)
749 sv_setpv(sv, os2error(Perl_rc));
752 sv_setpv(sv, errno ? Strerror(errno) : "");
756 SvNOK_on(sv); /* what a wonderful hack! */
759 sv_setiv(sv, (IV)PL_uid);
762 sv_setiv(sv, (IV)PL_euid);
765 sv_setiv(sv, (IV)PL_gid);
767 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
771 sv_setiv(sv, (IV)PL_egid);
773 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
778 Groups_t gary[NGROUPS];
779 i = getgroups(NGROUPS,gary);
781 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
784 (void)SvIOK_on(sv); /* what a wonderful hack! */
788 #ifndef MACOS_TRADITIONAL
794 sv_setsv(sv, thr->errsv);
796 #endif /* USE_THREADS */
802 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
804 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
806 if (uf && uf->uf_val)
807 (*uf->uf_val)(uf->uf_index, sv);
812 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
823 #ifdef DYNAMIC_ENV_FETCH
824 /* We just undefd an environment var. Is a replacement */
825 /* waiting in the wings? */
828 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
829 s = SvPV(*valp, len);
833 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
834 /* And you'll never guess what the dog had */
835 /* in its mouth... */
837 MgTAINTEDDIR_off(mg);
839 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
840 char pathbuf[256], eltbuf[256], *cp, *elt = s;
844 do { /* DCL$PATH may be a search list */
845 while (1) { /* as may dev portion of any element */
846 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
847 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
848 cando_by_name(S_IWUSR,0,elt) ) {
853 if ((cp = strchr(elt, ':')) != Nullch)
855 if (my_trnlnm(elt, eltbuf, j++))
861 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
864 if (s && klen == 4 && strEQ(ptr,"PATH")) {
865 char *strend = s + len;
870 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
873 if (i >= sizeof tmpbuf /* too long -- assume the worst */
875 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
882 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
888 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
891 my_setenv(MgPV(mg,n_a),Nullch);
896 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
899 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
905 magic_clear_all_env(sv,mg);
906 hv_iterinit((HV*)sv);
907 while ((entry = hv_iternext((HV*)sv))) {
909 my_setenv(hv_iterkey(entry, &keylen),
910 SvPV(hv_iterval((HV*)sv, entry), n_a));
918 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
920 #if defined(VMS) || defined(EPOC)
921 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
923 # ifdef PERL_IMPLICIT_SYS
927 char *envv = GetEnvironmentStrings();
931 char *end = strchr(cur,'=');
932 if (end && end != cur) {
934 my_setenv(cur,Nullch);
936 cur = end + strlen(end+1)+2;
938 else if ((len = strlen(cur)))
941 FreeEnvironmentStrings(envv);
943 # ifndef PERL_USE_SAFE_PUTENV
946 if (environ == PL_origenviron)
947 environ = (char**)safesysmalloc(sizeof(char*));
949 for (i = 0; environ[i]; i++)
950 safesysfree(environ[i]);
951 # endif /* PERL_USE_SAFE_PUTENV */
956 # endif /* PERL_IMPLICIT_SYS */
963 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
967 /* Are we fetching a signal entry? */
968 i = whichsig(MgPV(mg,n_a));
971 sv_setsv(sv,PL_psig_ptr[i]);
973 Sighandler_t sigstate = rsignal_state(i);
975 /* cache state so we don't fetch it again */
976 if(sigstate == SIG_IGN)
977 sv_setpv(sv,"IGNORE");
979 sv_setsv(sv,&PL_sv_undef);
980 PL_psig_ptr[i] = SvREFCNT_inc(sv);
987 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
991 /* Are we clearing a signal entry? */
992 i = whichsig(MgPV(mg,n_a));
995 SvREFCNT_dec(PL_psig_ptr[i]);
998 if(PL_psig_name[i]) {
999 SvREFCNT_dec(PL_psig_name[i]);
1007 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1017 if (strEQ(s,"__DIE__"))
1019 else if (strEQ(s,"__WARN__"))
1022 Perl_croak(aTHX_ "No such hook: %s", s);
1030 i = whichsig(s); /* ...no, a brick */
1032 if (ckWARN(WARN_SIGNAL))
1033 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1036 SvREFCNT_dec(PL_psig_name[i]);
1037 SvREFCNT_dec(PL_psig_ptr[i]);
1038 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1039 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1040 PL_psig_name[i] = newSVpvn(s, len);
1041 SvREADONLY_on(PL_psig_name[i]);
1043 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1045 (void)rsignal(i, PL_sighandlerp);
1047 *svp = SvREFCNT_inc(sv);
1050 s = SvPV_force(sv,len);
1051 if (strEQ(s,"IGNORE")) {
1053 (void)rsignal(i, SIG_IGN);
1057 else if (strEQ(s,"DEFAULT") || !*s) {
1059 (void)rsignal(i, SIG_DFL);
1065 * We should warn if HINT_STRICT_REFS, but without
1066 * access to a known hint bit in a known OP, we can't
1067 * tell whether HINT_STRICT_REFS is in force or not.
1069 if (!strchr(s,':') && !strchr(s,'\''))
1070 sv_insert(sv, 0, 0, "main::", 6);
1072 (void)rsignal(i, PL_sighandlerp);
1074 *svp = SvREFCNT_inc(sv);
1078 #endif /* !PERL_MICRO */
1081 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1083 PL_sub_generation++;
1088 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1090 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1091 PL_amagic_generation++;
1097 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1099 HV *hv = (HV*)LvTARG(sv);
1104 (void) hv_iterinit(hv);
1105 if (! SvTIED_mg((SV*)hv, 'P'))
1109 while ((entry = hv_iternext(hv))) {
1115 sv_setiv(sv, (IV)i);
1120 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1123 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1128 /* caller is responsible for stack switching/cleanup */
1130 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1136 PUSHs(SvTIED_obj(sv, mg));
1139 if (mg->mg_len >= 0)
1140 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1141 else if (mg->mg_len == HEf_SVKEY)
1142 PUSHs((SV*)mg->mg_ptr);
1144 else if (mg->mg_type == 'p') {
1145 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1153 return call_method(meth, flags);
1157 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1163 PUSHSTACKi(PERLSI_MAGIC);
1165 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1166 sv_setsv(sv, *PL_stack_sp--);
1176 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1178 magic_methpack(sv,mg,"FETCH");
1180 mg->mg_flags |= MGf_GSKIP;
1185 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1189 PUSHSTACKi(PERLSI_MAGIC);
1190 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1197 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1199 return magic_methpack(sv,mg,"DELETE");
1204 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1211 PUSHSTACKi(PERLSI_MAGIC);
1212 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1213 sv = *PL_stack_sp--;
1214 retval = (U32) SvIV(sv)-1;
1223 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1228 PUSHSTACKi(PERLSI_MAGIC);
1230 XPUSHs(SvTIED_obj(sv, mg));
1232 call_method("CLEAR", G_SCALAR|G_DISCARD);
1239 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1242 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1246 PUSHSTACKi(PERLSI_MAGIC);
1249 PUSHs(SvTIED_obj(sv, mg));
1254 if (call_method(meth, G_SCALAR))
1255 sv_setsv(key, *PL_stack_sp--);
1264 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1266 return magic_methpack(sv,mg,"EXISTS");
1270 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1281 svp = av_fetch(GvAV(gv),
1282 atoi(MgPV(mg,n_a)), FALSE);
1283 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1289 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1292 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1297 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1300 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1305 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1307 SV* lsv = LvTARG(sv);
1309 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1310 mg = mg_find(lsv, 'g');
1311 if (mg && mg->mg_len >= 0) {
1315 sv_pos_b2u(lsv, &i);
1316 sv_setiv(sv, i + PL_curcop->cop_arybase);
1325 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1327 SV* lsv = LvTARG(sv);
1335 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1336 mg = mg_find(lsv, 'g');
1340 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1341 mg = mg_find(lsv, 'g');
1343 else if (!SvOK(sv)) {
1347 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1349 pos = SvIV(sv) - PL_curcop->cop_arybase;
1352 ulen = sv_len_utf8(lsv);
1367 sv_pos_u2b(lsv, &p, 0);
1372 mg->mg_flags &= ~MGf_MINMATCH;
1378 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1380 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1382 gv_efullname3(sv,((GV*)sv), "*");
1386 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1391 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1400 if (*s == '*' && s[1])
1402 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1407 GvGP(sv) = gp_ref(GvGP(gv));
1412 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1415 SV *lsv = LvTARG(sv);
1416 char *tmps = SvPV(lsv,len);
1417 I32 offs = LvTARGOFF(sv);
1418 I32 rem = LvTARGLEN(sv);
1422 if (rem + offs > len)
1424 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1431 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1434 char *tmps = SvPV(sv,len);
1435 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1440 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1443 TAINT_IF((mg->mg_len & 1) ||
1444 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1449 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1452 if (PL_localizing) {
1453 if (PL_localizing == 1)
1458 else if (PL_tainted)
1466 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1468 SV *lsv = LvTARG(sv);
1475 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1480 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1482 do_vecset(sv); /* XXX slurp this routine */
1487 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1490 if (LvTARGLEN(sv)) {
1492 SV *ahv = LvTARG(sv);
1493 if (SvTYPE(ahv) == SVt_PVHV) {
1494 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1499 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1505 AV* av = (AV*)LvTARG(sv);
1506 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1507 targ = AvARRAY(av)[LvTARGOFF(sv)];
1509 if (targ && targ != &PL_sv_undef) {
1510 dTHR; /* just for SvREFCNT_dec */
1511 /* somebody else defined it for us */
1512 SvREFCNT_dec(LvTARG(sv));
1513 LvTARG(sv) = SvREFCNT_inc(targ);
1515 SvREFCNT_dec(mg->mg_obj);
1516 mg->mg_obj = Nullsv;
1517 mg->mg_flags &= ~MGf_REFCOUNTED;
1522 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1527 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1532 sv_setsv(LvTARG(sv), sv);
1533 SvSETMAGIC(LvTARG(sv));
1539 Perl_vivify_defelem(pTHX_ SV *sv)
1541 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1545 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1548 SV *ahv = LvTARG(sv);
1550 if (SvTYPE(ahv) == SVt_PVHV) {
1551 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1556 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1560 if (!value || value == &PL_sv_undef)
1561 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1564 AV* av = (AV*)LvTARG(sv);
1565 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1566 LvTARG(sv) = Nullsv; /* array can't be extended */
1568 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1569 if (!svp || (value = *svp) == &PL_sv_undef)
1570 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1573 (void)SvREFCNT_inc(value);
1574 SvREFCNT_dec(LvTARG(sv));
1577 SvREFCNT_dec(mg->mg_obj);
1578 mg->mg_obj = Nullsv;
1579 mg->mg_flags &= ~MGf_REFCOUNTED;
1583 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1585 AV *av = (AV*)mg->mg_obj;
1586 SV **svp = AvARRAY(av);
1587 I32 i = AvFILLp(av);
1589 if (svp[i] && svp[i] != &PL_sv_undef) {
1590 if (!SvWEAKREF(svp[i]))
1591 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1592 /* XXX Should we check that it hasn't changed? */
1594 (void)SvOK_off(svp[i]);
1595 SvWEAKREF_off(svp[i]);
1596 svp[i] = &PL_sv_undef;
1604 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1612 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1614 sv_unmagic(sv, 'B');
1620 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1622 sv_unmagic(sv, 'f');
1628 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1630 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1632 if (uf && uf->uf_set)
1633 (*uf->uf_set)(uf->uf_index, sv);
1638 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1640 regexp *re = (regexp *)mg->mg_obj;
1645 #ifdef USE_LOCALE_COLLATE
1647 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1650 * RenE<eacute> Descartes said "I think not."
1651 * and vanished with a faint plop.
1654 Safefree(mg->mg_ptr);
1660 #endif /* USE_LOCALE_COLLATE */
1663 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1669 switch (*mg->mg_ptr) {
1670 case '\001': /* ^A */
1671 sv_setsv(PL_bodytarget, sv);
1673 case '\003': /* ^C */
1674 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1677 case '\004': /* ^D */
1678 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1679 DEBUG_x(dump_all());
1681 case '\005': /* ^E */
1682 #ifdef MACOS_TRADITIONAL
1683 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1686 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1689 SetLastError( SvIV(sv) );
1692 /* will anyone ever use this? */
1693 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1699 case '\006': /* ^F */
1700 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1702 case '\010': /* ^H */
1703 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1705 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1707 Safefree(PL_inplace);
1709 PL_inplace = savepv(SvPV(sv,len));
1711 PL_inplace = Nullch;
1713 case '\017': /* ^O */
1714 if (*(mg->mg_ptr+1) == '\0') {
1716 Safefree(PL_osname);
1718 PL_osname = savepv(SvPV(sv,len));
1722 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1723 if (!PL_compiling.cop_io)
1724 PL_compiling.cop_io = newSVsv(sv);
1726 sv_setsv(PL_compiling.cop_io,sv);
1729 case '\020': /* ^P */
1730 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1731 if (PL_perldb && !PL_DBsingle)
1734 case '\024': /* ^T */
1736 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1738 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1741 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1742 if (*(mg->mg_ptr+1) == '\0') {
1743 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1744 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1745 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1746 | (i ? G_WARN_ON : G_WARN_OFF) ;
1749 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1750 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1751 if (!SvPOK(sv) && PL_localizing) {
1752 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1753 PL_compiling.cop_warnings = pWARN_NONE;
1758 int accumulate = 0 ;
1759 int any_fatals = 0 ;
1760 char * ptr = (char*)SvPV(sv, len) ;
1761 for (i = 0 ; i < len ; ++i) {
1762 accumulate |= ptr[i] ;
1763 any_fatals |= (ptr[i] & 0xAA) ;
1766 PL_compiling.cop_warnings = pWARN_NONE;
1767 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1768 PL_compiling.cop_warnings = pWARN_ALL;
1769 PL_dowarn |= G_WARN_ONCE ;
1772 if (specialWARN(PL_compiling.cop_warnings))
1773 PL_compiling.cop_warnings = newSVsv(sv) ;
1775 sv_setsv(PL_compiling.cop_warnings, sv);
1776 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1777 PL_dowarn |= G_WARN_ONCE ;
1783 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1784 PL_widesyscalls = SvTRUE(sv);
1787 if (PL_localizing) {
1788 if (PL_localizing == 1)
1789 SAVESPTR(PL_last_in_gv);
1791 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1792 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1795 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1796 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1797 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1800 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1801 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1802 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1805 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1808 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1809 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1810 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1813 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1817 IO *io = GvIOp(PL_defoutgv);
1818 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1819 IoFLAGS(io) &= ~IOf_FLUSH;
1821 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1822 PerlIO *ofp = IoOFP(io);
1824 (void)PerlIO_flush(ofp);
1825 IoFLAGS(io) |= IOf_FLUSH;
1831 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1832 PL_multiline = (i != 0);
1835 SvREFCNT_dec(PL_nrs);
1836 PL_nrs = newSVsv(sv);
1837 SvREFCNT_dec(PL_rs);
1838 PL_rs = SvREFCNT_inc(PL_nrs);
1843 if (SvOK(sv) || SvGMAGICAL(sv)) {
1844 s = SvPV(sv,PL_orslen);
1845 PL_ors = savepvn(s,PL_orslen);
1855 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1860 PL_ofmt = savepv(SvPV(sv,len));
1863 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1866 #ifdef COMPLEX_STATUS
1867 if (PL_localizing == 2) {
1868 PL_statusvalue = LvTARGOFF(sv);
1869 PL_statusvalue_vms = LvTARGLEN(sv);
1873 #ifdef VMSISH_STATUS
1875 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1878 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1881 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1882 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1885 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1886 if (PL_delaymagic) {
1887 PL_delaymagic |= DM_RUID;
1888 break; /* don't do magic till later */
1891 (void)setruid((Uid_t)PL_uid);
1894 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1896 #ifdef HAS_SETRESUID
1897 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1899 if (PL_uid == PL_euid) /* special case $< = $> */
1900 (void)PerlProc_setuid(PL_uid);
1902 PL_uid = PerlProc_getuid();
1903 Perl_croak(aTHX_ "setruid() not implemented");
1908 PL_uid = PerlProc_getuid();
1909 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1912 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1913 if (PL_delaymagic) {
1914 PL_delaymagic |= DM_EUID;
1915 break; /* don't do magic till later */
1918 (void)seteuid((Uid_t)PL_euid);
1921 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1923 #ifdef HAS_SETRESUID
1924 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1926 if (PL_euid == PL_uid) /* special case $> = $< */
1927 PerlProc_setuid(PL_euid);
1929 PL_euid = PerlProc_geteuid();
1930 Perl_croak(aTHX_ "seteuid() not implemented");
1935 PL_euid = PerlProc_geteuid();
1936 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1939 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1940 if (PL_delaymagic) {
1941 PL_delaymagic |= DM_RGID;
1942 break; /* don't do magic till later */
1945 (void)setrgid((Gid_t)PL_gid);
1948 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1950 #ifdef HAS_SETRESGID
1951 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1953 if (PL_gid == PL_egid) /* special case $( = $) */
1954 (void)PerlProc_setgid(PL_gid);
1956 PL_gid = PerlProc_getgid();
1957 Perl_croak(aTHX_ "setrgid() not implemented");
1962 PL_gid = PerlProc_getgid();
1963 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1966 #ifdef HAS_SETGROUPS
1968 char *p = SvPV(sv, len);
1969 Groups_t gary[NGROUPS];
1974 for (i = 0; i < NGROUPS; ++i) {
1975 while (*p && !isSPACE(*p))
1984 (void)setgroups(i, gary);
1986 #else /* HAS_SETGROUPS */
1987 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1988 #endif /* HAS_SETGROUPS */
1989 if (PL_delaymagic) {
1990 PL_delaymagic |= DM_EGID;
1991 break; /* don't do magic till later */
1994 (void)setegid((Gid_t)PL_egid);
1997 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1999 #ifdef HAS_SETRESGID
2000 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2002 if (PL_egid == PL_gid) /* special case $) = $( */
2003 (void)PerlProc_setgid(PL_egid);
2005 PL_egid = PerlProc_getegid();
2006 Perl_croak(aTHX_ "setegid() not implemented");
2011 PL_egid = PerlProc_getegid();
2012 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2015 PL_chopset = SvPV_force(sv,len);
2017 #ifndef MACOS_TRADITIONAL
2019 #ifdef HAS_SETPROCTITLE
2020 /* The BSDs don't show the argv[] in ps(1) output, they
2021 * show a string from the process struct and provide
2022 * the setproctitle() routine to manipulate that. */
2025 # if __FreeBSD_version >= 410001
2026 /* The leading "-" removes the "perl: " prefix,
2027 * but not the "(perl) suffix from the ps(1)
2028 * output, because that's what ps(1) shows if the
2029 * argv[] is modified. */
2030 setproctitle("-%s", s, len + 1);
2031 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2032 /* This doesn't really work if you assume that
2033 * $0 = 'foobar'; will wipe out 'perl' from the $0
2034 * because in ps(1) output the result will be like
2035 * sprintf("perl: %s (perl)", s)
2036 * I guess this is a security feature:
2037 * one (a user process) cannot get rid of the original name.
2039 setproctitle("%s", s);
2046 /* See if all the arguments are contiguous in memory */
2047 for (i = 1; i < PL_origargc; i++) {
2048 if (PL_origargv[i] == s + 1
2050 || PL_origargv[i] == s + 2
2055 s += strlen(s); /* this one is ok too */
2060 /* can grab env area too? */
2061 if (PL_origenviron && (PL_origenviron[0] == s + 1
2063 || (PL_origenviron[0] == s + 9 && (s += 8))
2066 my_setenv("NoNe SuCh", Nullch);
2067 /* force copy of environment */
2068 for (i = 0; PL_origenviron[i]; i++)
2069 if (PL_origenviron[i] == s + 1) {
2076 PL_origalen = s - PL_origargv[0];
2078 s = SvPV_force(sv,len);
2080 if (i >= PL_origalen) {
2082 /* don't allow system to limit $0 seen by script */
2083 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2084 Copy(s, PL_origargv[0], i, char);
2085 s = PL_origargv[0]+i;
2089 Copy(s, PL_origargv[0], i, char);
2090 s = PL_origargv[0]+i;
2092 while (++i < PL_origalen)
2094 s = PL_origargv[0]+i;
2095 for (i = 1; i < PL_origargc; i++)
2096 PL_origargv[i] = Nullch;
2102 sv_setsv(thr->errsv, sv);
2104 #endif /* USE_THREADS */
2111 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2114 DEBUG_S(PerlIO_printf(Perl_debug_log,
2115 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2116 PTR2UV(thr), PTR2UV(sv));)
2118 Perl_croak(aTHX_ "panic: magic_mutexfree");
2119 MUTEX_DESTROY(MgMUTEXP(mg));
2120 COND_DESTROY(MgCONDP(mg));
2123 #endif /* USE_THREADS */
2126 Perl_whichsig(pTHX_ char *sig)
2128 register char **sigv;
2130 for (sigv = PL_sig_name+1; *sigv; sigv++)
2131 if (strEQ(sig,*sigv))
2132 return PL_sig_num[sigv - PL_sig_name];
2134 if (strEQ(sig,"CHLD"))
2138 if (strEQ(sig,"CLD"))
2147 Perl_sighandler(int sig)
2149 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2150 dTHXoa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2157 SV *sv, *tSv = PL_Sv;
2161 I32 o_save_i = PL_savestack_ix;
2164 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2165 PERL_SET_THX(aTHXo); /* fake TLS, see above */
2168 if (PL_savestack_ix + 15 <= PL_savestack_max)
2170 if (PL_markstack_ptr < PL_markstack_max - 2)
2172 if (PL_retstack_ix < PL_retstack_max - 2)
2174 if (PL_scopestack_ix < PL_scopestack_max - 3)
2177 if (!PL_psig_ptr[sig])
2178 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2181 /* Max number of items pushed there is 3*n or 4. We cannot fix
2182 infinity, so we fix 4 (in fact 5): */
2184 PL_savestack_ix += 5; /* Protect save in progress. */
2185 o_save_i = PL_savestack_ix;
2186 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2189 PL_markstack_ptr++; /* Protect mark. */
2192 PL_retstack[PL_retstack_ix] = NULL;
2195 PL_scopestack_ix += 1;
2196 /* sv_2cv is too complicated, try a simpler variant first: */
2197 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2198 || SvTYPE(cv) != SVt_PVCV)
2199 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2201 if (!cv || !CvROOT(cv)) {
2202 if (ckWARN(WARN_SIGNAL))
2203 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2204 PL_sig_name[sig], (gv ? GvENAME(gv)
2211 if(PL_psig_name[sig]) {
2212 sv = SvREFCNT_inc(PL_psig_name[sig]);
2216 sv = sv_newmortal();
2217 sv_setpv(sv,PL_sig_name[sig]);
2220 PUSHSTACKi(PERLSI_SIGNAL);
2225 call_sv((SV*)cv, G_DISCARD);
2230 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2236 PL_scopestack_ix -= 1;
2239 PL_op = myop; /* Apparently not needed... */
2241 PL_Sv = tSv; /* Restore global temporaries. */
2252 restore_magic(pTHXo_ void *p)
2255 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2256 SV* sv = mgs->mgs_sv;
2261 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2264 SvFLAGS(sv) |= mgs->mgs_flags;
2268 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2271 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2273 /* If we're still on top of the stack, pop us off. (That condition
2274 * will be satisfied if restore_magic was called explicitly, but *not*
2275 * if it's being called via leave_scope.)
2276 * The reason for doing this is that otherwise, things like sv_2cv()
2277 * may leave alloc gunk on the savestack, and some code
2278 * (e.g. sighandler) doesn't expect that...
2280 if (PL_savestack_ix == mgs->mgs_ss_ix)
2282 I32 popval = SSPOPINT;
2283 assert(popval == SAVEt_DESTRUCTOR_X);
2284 PL_savestack_ix -= 2;
2286 assert(popval == SAVEt_ALLOC);
2288 PL_savestack_ix -= popval;
2294 unwind_handler_stack(pTHXo_ void *p)
2297 U32 flags = *(U32*)p;
2300 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2301 /* cxstack_ix-- Not needed, die already unwound it. */
2303 SvREFCNT_dec(sig_sv);