3 * Copyright (c) 1991-2001, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
12 * come here, and I don't want to see no more magic,' he said, and fell silent."
19 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
28 static void restore_magic(pTHXo_ void *p);
29 static void unwind_handler_stack(pTHXo_ void *p);
32 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
40 /* MGS is typedef'ed to struct magic_state in perl.h */
43 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
46 assert(SvMAGICAL(sv));
48 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
50 mgs = SSPTR(mgs_ix, MGS*);
52 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
53 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
57 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
61 =for apidoc mg_magical
63 Turns on the magical status of an SV. See C<sv_magic>.
69 Perl_mg_magical(pTHX_ SV *sv)
72 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
73 MGVTBL* vtbl = mg->mg_virtual;
75 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
79 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
88 Do magic after a value is retrieved from the SV. See C<sv_magic>.
94 Perl_mg_get(pTHX_ SV *sv)
101 mgs_ix = SSNEW(sizeof(MGS));
102 save_magic(mgs_ix, sv);
105 while ((mg = *mgp) != 0) {
106 MGVTBL* vtbl = mg->mg_virtual;
107 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
108 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
109 /* Ignore this magic if it's been deleted */
110 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
111 (mg->mg_flags & MGf_GSKIP))
112 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
114 /* Advance to next magic (complicated by possible deletion) */
115 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
116 mgp = &mg->mg_moremagic;
120 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
123 restore_magic(aTHXo_ INT2PTR(void*, (IV)mgs_ix));
130 Do magic after a value is assigned to the SV. See C<sv_magic>.
136 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_ INT2PTR(void*, (IV)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_ INT2PTR(void*, (IV)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_ INT2PTR(void*, (IV)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_ INT2PTR(void*, (IV)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)
269 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
270 if (mg->mg_type == type)
279 Copies the magic from one SV to another. See C<sv_magic>.
285 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
289 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
290 if (isUPPER(mg->mg_type)) {
292 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
293 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
295 toLOWER(mg->mg_type), key, klen);
305 Free any magic storage used by the SV. See C<sv_magic>.
311 Perl_mg_free(pTHX_ SV *sv)
315 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
316 MGVTBL* vtbl = mg->mg_virtual;
317 moremagic = mg->mg_moremagic;
318 if (vtbl && vtbl->svt_free)
319 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
320 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
322 Safefree(mg->mg_ptr);
323 else if (mg->mg_len == HEf_SVKEY)
324 SvREFCNT_dec((SV*)mg->mg_ptr);
326 if (mg->mg_flags & MGf_REFCOUNTED)
327 SvREFCNT_dec(mg->mg_obj);
335 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
340 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
344 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
345 if (mg->mg_obj) /* @+ */
348 return rx->lastparen;
355 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
363 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
367 if (paren <= rx->nparens &&
368 (s = rx->startp[paren]) != -1 &&
369 (t = rx->endp[paren]) != -1)
371 if (mg->mg_obj) /* @+ */
376 if (i > 0 && DO_UTF8(PL_reg_sv)) {
377 char *b = rx->subbeg;
379 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
389 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
391 Perl_croak(aTHX_ PL_no_modify);
397 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
404 switch (*mg->mg_ptr) {
405 case '1': case '2': case '3': case '4':
406 case '5': case '6': case '7': case '8': case '9': case '&':
407 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
409 paren = atoi(mg->mg_ptr); /* $& is in [0] */
411 if (paren <= rx->nparens &&
412 (s1 = rx->startp[paren]) != -1 &&
413 (t1 = rx->endp[paren]) != -1)
417 if (i > 0 && DO_UTF8(PL_reg_sv)) {
418 char *s = rx->subbeg + s1;
419 char *send = rx->subbeg + t1;
422 if (is_utf8_string((U8*)s, i))
423 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
426 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
432 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
433 paren = rx->lastparen;
438 case '\016': /* ^N */
439 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
440 paren = rx->lastcloseparen;
446 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
447 if (rx->startp[0] != -1) {
458 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
459 if (rx->endp[0] != -1) {
460 i = rx->sublen - rx->endp[0];
471 if (!SvPOK(sv) && SvNIOK(sv)) {
481 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
488 switch (*mg->mg_ptr) {
489 case '\001': /* ^A */
490 sv_setsv(sv, PL_bodytarget);
492 case '\003': /* ^C */
493 sv_setiv(sv, (IV)PL_minus_c);
496 case '\004': /* ^D */
497 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
498 #if defined(YYDEBUG) && defined(DEBUGGING)
499 PL_yydebug = DEBUG_p_TEST;
502 case '\005': /* ^E */
503 #ifdef MACOS_TRADITIONAL
507 sv_setnv(sv,(double)gMacPerl_OSErr);
508 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
513 # include <descrip.h>
514 # include <starlet.h>
516 $DESCRIPTOR(msgdsc,msg);
517 sv_setnv(sv,(NV) vaxc$errno);
518 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
519 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
525 if (!(_emx_env & 0x200)) { /* Under DOS */
526 sv_setnv(sv, (NV)errno);
527 sv_setpv(sv, errno ? Strerror(errno) : "");
529 if (errno != errno_isOS2) {
530 int tmp = _syserrno();
531 if (tmp) /* 2nd call to _syserrno() makes it 0 */
534 sv_setnv(sv, (NV)Perl_rc);
535 sv_setpv(sv, os2error(Perl_rc));
540 DWORD dwErr = GetLastError();
541 sv_setnv(sv, (NV)dwErr);
544 PerlProc_GetOSError(sv, dwErr);
551 sv_setnv(sv, (NV)errno);
552 sv_setpv(sv, errno ? Strerror(errno) : "");
557 SvNOK_on(sv); /* what a wonderful hack! */
559 case '\006': /* ^F */
560 sv_setiv(sv, (IV)PL_maxsysfd);
562 case '\010': /* ^H */
563 sv_setiv(sv, (IV)PL_hints);
565 case '\011': /* ^I */ /* NOT \t in EBCDIC */
567 sv_setpv(sv, PL_inplace);
569 sv_setsv(sv, &PL_sv_undef);
571 case '\017': /* ^O & ^OPEN */
572 if (*(mg->mg_ptr+1) == '\0')
573 sv_setpv(sv, PL_osname);
574 else if (strEQ(mg->mg_ptr, "\017PEN")) {
575 if (!PL_compiling.cop_io)
576 sv_setsv(sv, &PL_sv_undef);
578 sv_setsv(sv, PL_compiling.cop_io);
582 case '\020': /* ^P */
583 sv_setiv(sv, (IV)PL_perldb);
585 case '\023': /* ^S */
587 if (PL_lex_state != LEX_NOTPARSING)
590 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
595 case '\024': /* ^T */
597 sv_setnv(sv, PL_basetime);
599 sv_setiv(sv, (IV)PL_basetime);
602 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
603 if (*(mg->mg_ptr+1) == '\0')
604 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
605 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
606 if (PL_compiling.cop_warnings == pWARN_NONE ||
607 PL_compiling.cop_warnings == pWARN_STD)
609 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
611 else if (PL_compiling.cop_warnings == pWARN_ALL) {
612 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
615 sv_setsv(sv, PL_compiling.cop_warnings);
619 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
620 sv_setiv(sv, (IV)PL_widesyscalls);
622 case '1': case '2': case '3': case '4':
623 case '5': case '6': case '7': case '8': case '9': case '&':
624 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
628 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
629 * XXX Does the new way break anything?
631 paren = atoi(mg->mg_ptr); /* $& is in [0] */
633 if (paren <= rx->nparens &&
634 (s1 = rx->startp[paren]) != -1 &&
635 (t1 = rx->endp[paren]) != -1)
644 bool was_tainted = FALSE;
646 was_tainted = PL_tainted;
650 if (PL_reg_sv && DO_UTF8(PL_reg_sv) && is_utf8_string((U8*)s, i))
655 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
660 sv_setsv(sv,&PL_sv_undef);
663 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
664 paren = rx->lastparen;
668 sv_setsv(sv,&PL_sv_undef);
670 case '\016': /* ^N */
671 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
672 paren = rx->lastcloseparen;
676 sv_setsv(sv,&PL_sv_undef);
679 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
680 if ((s = rx->subbeg) && rx->startp[0] != -1) {
685 sv_setsv(sv,&PL_sv_undef);
688 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
689 if (rx->subbeg && rx->endp[0] != -1) {
690 s = rx->subbeg + rx->endp[0];
691 i = rx->sublen - rx->endp[0];
695 sv_setsv(sv,&PL_sv_undef);
699 if (GvIO(PL_last_in_gv)) {
700 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
706 sv_setiv(sv, (IV)STATUS_CURRENT);
707 #ifdef COMPLEX_STATUS
708 LvTARGOFF(sv) = PL_statusvalue;
709 LvTARGLEN(sv) = PL_statusvalue_vms;
714 s = IoTOP_NAME(GvIOp(PL_defoutgv));
718 sv_setpv(sv,GvENAME(PL_defoutgv));
723 s = IoFMT_NAME(GvIOp(PL_defoutgv));
725 s = GvENAME(PL_defoutgv);
730 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
733 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
736 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
744 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
747 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
754 sv_setpv(sv,PL_ofmt);
758 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
759 sv_setpv(sv, errno ? Strerror(errno) : "");
762 int saveerrno = errno;
763 sv_setnv(sv, (NV)errno);
765 if (errno == errno_isOS2 || errno == errno_isOS2_set)
766 sv_setpv(sv, os2error(Perl_rc));
769 sv_setpv(sv, errno ? Strerror(errno) : "");
773 SvNOK_on(sv); /* what a wonderful hack! */
776 sv_setiv(sv, (IV)PL_uid);
779 sv_setiv(sv, (IV)PL_euid);
782 sv_setiv(sv, (IV)PL_gid);
784 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
788 sv_setiv(sv, (IV)PL_egid);
790 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
795 Groups_t gary[NGROUPS];
796 i = getgroups(NGROUPS,gary);
798 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
801 (void)SvIOK_on(sv); /* what a wonderful hack! */
805 #ifndef MACOS_TRADITIONAL
811 sv_setsv(sv, thr->errsv);
813 #endif /* USE_THREADS */
819 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
821 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
823 if (uf && uf->uf_val)
824 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
829 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
840 #ifdef DYNAMIC_ENV_FETCH
841 /* We just undefd an environment var. Is a replacement */
842 /* waiting in the wings? */
845 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
846 s = SvPV(*valp, len);
850 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
851 /* And you'll never guess what the dog had */
852 /* in its mouth... */
854 MgTAINTEDDIR_off(mg);
856 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
857 char pathbuf[256], eltbuf[256], *cp, *elt = s;
861 do { /* DCL$PATH may be a search list */
862 while (1) { /* as may dev portion of any element */
863 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
864 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
865 cando_by_name(S_IWUSR,0,elt) ) {
870 if ((cp = strchr(elt, ':')) != Nullch)
872 if (my_trnlnm(elt, eltbuf, j++))
878 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
881 if (s && klen == 4 && strEQ(ptr,"PATH")) {
882 char *strend = s + len;
887 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
890 if (i >= sizeof tmpbuf /* too long -- assume the worst */
892 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
899 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
905 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
908 my_setenv(MgPV(mg,n_a),Nullch);
913 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
916 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
921 magic_clear_all_env(sv,mg);
922 hv_iterinit((HV*)sv);
923 while ((entry = hv_iternext((HV*)sv))) {
925 my_setenv(hv_iterkey(entry, &keylen),
926 SvPV(hv_iterval((HV*)sv, entry), n_a));
934 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
936 #if defined(VMS) || defined(EPOC)
937 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
939 # ifdef PERL_IMPLICIT_SYS
943 char *envv = GetEnvironmentStrings();
947 char *end = strchr(cur,'=');
948 if (end && end != cur) {
950 my_setenv(cur,Nullch);
952 cur = end + strlen(end+1)+2;
954 else if ((len = strlen(cur)))
957 FreeEnvironmentStrings(envv);
959 #ifdef USE_ENVIRON_ARRAY
960 # ifndef PERL_USE_SAFE_PUTENV
963 if (environ == PL_origenviron)
964 environ = (char**)safesysmalloc(sizeof(char*));
966 for (i = 0; environ[i]; i++)
967 safesysfree(environ[i]);
968 # endif /* PERL_USE_SAFE_PUTENV */
972 #endif /* USE_ENVIRON_ARRAY */
974 # endif /* PERL_IMPLICIT_SYS */
981 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
985 /* Are we fetching a signal entry? */
986 i = whichsig(MgPV(mg,n_a));
989 sv_setsv(sv,PL_psig_ptr[i]);
991 Sighandler_t sigstate = rsignal_state(i);
993 /* cache state so we don't fetch it again */
994 if(sigstate == SIG_IGN)
995 sv_setpv(sv,"IGNORE");
997 sv_setsv(sv,&PL_sv_undef);
998 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1005 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1009 /* Are we clearing a signal entry? */
1010 i = whichsig(MgPV(mg,n_a));
1012 if(PL_psig_ptr[i]) {
1013 SvREFCNT_dec(PL_psig_ptr[i]);
1016 if(PL_psig_name[i]) {
1017 SvREFCNT_dec(PL_psig_name[i]);
1025 Perl_raise_signal(pTHX_ int sig)
1027 /* Set a flag to say this signal is pending */
1028 PL_psig_pend[sig]++;
1029 /* And one to say _a_ signal is pending */
1034 Perl_csighandler(int sig)
1036 #ifdef PERL_OLD_SIGNALS
1037 /* Call the perl level handler now with risk we may be in malloc() etc. */
1038 (*PL_sighandlerp)(sig);
1041 Perl_raise_signal(aTHX_ sig);
1046 Perl_despatch_signals(pTHX)
1050 for (sig = 1; sig < SIG_SIZE; sig++) {
1051 if (PL_psig_pend[sig]) {
1052 PL_psig_pend[sig] = 0;
1053 (*PL_sighandlerp)(sig);
1059 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1068 if (strEQ(s,"__DIE__"))
1070 else if (strEQ(s,"__WARN__"))
1073 Perl_croak(aTHX_ "No such hook: %s", s);
1081 i = whichsig(s); /* ...no, a brick */
1083 if (ckWARN(WARN_SIGNAL))
1084 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1087 SvREFCNT_dec(PL_psig_name[i]);
1088 SvREFCNT_dec(PL_psig_ptr[i]);
1089 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1090 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1091 PL_psig_name[i] = newSVpvn(s, len);
1092 SvREADONLY_on(PL_psig_name[i]);
1094 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1096 (void)rsignal(i, &Perl_csighandler);
1098 *svp = SvREFCNT_inc(sv);
1101 s = SvPV_force(sv,len);
1102 if (strEQ(s,"IGNORE")) {
1104 (void)rsignal(i, SIG_IGN);
1108 else if (strEQ(s,"DEFAULT") || !*s) {
1110 (void)rsignal(i, SIG_DFL);
1116 * We should warn if HINT_STRICT_REFS, but without
1117 * access to a known hint bit in a known OP, we can't
1118 * tell whether HINT_STRICT_REFS is in force or not.
1120 if (!strchr(s,':') && !strchr(s,'\''))
1121 sv_insert(sv, 0, 0, "main::", 6);
1123 (void)rsignal(i, &Perl_csighandler);
1125 *svp = SvREFCNT_inc(sv);
1129 #endif /* !PERL_MICRO */
1132 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1134 PL_sub_generation++;
1139 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1141 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1142 PL_amagic_generation++;
1148 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1150 HV *hv = (HV*)LvTARG(sv);
1155 (void) hv_iterinit(hv);
1156 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1160 while ((entry = hv_iternext(hv))) {
1166 sv_setiv(sv, (IV)i);
1171 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1174 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1179 /* caller is responsible for stack switching/cleanup */
1181 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1187 PUSHs(SvTIED_obj(sv, mg));
1190 if (mg->mg_len >= 0)
1191 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1192 else if (mg->mg_len == HEf_SVKEY)
1193 PUSHs((SV*)mg->mg_ptr);
1195 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1196 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1204 return call_method(meth, flags);
1208 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1214 PUSHSTACKi(PERLSI_MAGIC);
1216 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1217 sv_setsv(sv, *PL_stack_sp--);
1227 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1229 magic_methpack(sv,mg,"FETCH");
1231 mg->mg_flags |= MGf_GSKIP;
1236 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1240 PUSHSTACKi(PERLSI_MAGIC);
1241 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1248 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1250 return magic_methpack(sv,mg,"DELETE");
1255 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1262 PUSHSTACKi(PERLSI_MAGIC);
1263 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1264 sv = *PL_stack_sp--;
1265 retval = (U32) SvIV(sv)-1;
1274 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1279 PUSHSTACKi(PERLSI_MAGIC);
1281 XPUSHs(SvTIED_obj(sv, mg));
1283 call_method("CLEAR", G_SCALAR|G_DISCARD);
1290 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1293 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1297 PUSHSTACKi(PERLSI_MAGIC);
1300 PUSHs(SvTIED_obj(sv, mg));
1305 if (call_method(meth, G_SCALAR))
1306 sv_setsv(key, *PL_stack_sp--);
1315 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1317 return magic_methpack(sv,mg,"EXISTS");
1321 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1331 svp = av_fetch(GvAV(gv),
1332 atoi(MgPV(mg,n_a)), FALSE);
1333 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1339 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1341 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1346 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1348 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1353 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1355 SV* lsv = LvTARG(sv);
1357 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1358 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1359 if (mg && mg->mg_len >= 0) {
1362 sv_pos_b2u(lsv, &i);
1363 sv_setiv(sv, i + PL_curcop->cop_arybase);
1372 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1374 SV* lsv = LvTARG(sv);
1381 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1382 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1386 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1387 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1389 else if (!SvOK(sv)) {
1393 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1395 pos = SvIV(sv) - PL_curcop->cop_arybase;
1398 ulen = sv_len_utf8(lsv);
1413 sv_pos_u2b(lsv, &p, 0);
1418 mg->mg_flags &= ~MGf_MINMATCH;
1424 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1426 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1428 gv_efullname3(sv,((GV*)sv), "*");
1432 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1437 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1446 if (*s == '*' && s[1])
1448 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1453 GvGP(sv) = gp_ref(GvGP(gv));
1458 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1461 SV *lsv = LvTARG(sv);
1462 char *tmps = SvPV(lsv,len);
1463 I32 offs = LvTARGOFF(sv);
1464 I32 rem = LvTARGLEN(sv);
1467 sv_pos_u2b(lsv, &offs, &rem);
1470 if (rem + offs > len)
1472 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1479 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1482 char *tmps = SvPV(sv, len);
1483 SV *lsv = LvTARG(sv);
1484 I32 lvoff = LvTARGOFF(sv);
1485 I32 lvlen = LvTARGLEN(sv);
1488 sv_utf8_upgrade(lsv);
1489 sv_pos_u2b(lsv, &lvoff, &lvlen);
1490 sv_insert(lsv, lvoff, lvlen, tmps, len);
1493 else if (SvUTF8(lsv)) {
1494 sv_pos_u2b(lsv, &lvoff, &lvlen);
1495 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1496 sv_insert(lsv, lvoff, lvlen, tmps, len);
1500 sv_insert(lsv, lvoff, lvlen, tmps, len);
1506 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1508 TAINT_IF((mg->mg_len & 1) ||
1509 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1514 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1516 if (PL_localizing) {
1517 if (PL_localizing == 1)
1522 else if (PL_tainted)
1530 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1532 SV *lsv = LvTARG(sv);
1539 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1544 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1546 do_vecset(sv); /* XXX slurp this routine */
1551 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1554 if (LvTARGLEN(sv)) {
1556 SV *ahv = LvTARG(sv);
1557 if (SvTYPE(ahv) == SVt_PVHV) {
1558 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1563 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1569 AV* av = (AV*)LvTARG(sv);
1570 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1571 targ = AvARRAY(av)[LvTARGOFF(sv)];
1573 if (targ && targ != &PL_sv_undef) {
1574 /* somebody else defined it for us */
1575 SvREFCNT_dec(LvTARG(sv));
1576 LvTARG(sv) = SvREFCNT_inc(targ);
1578 SvREFCNT_dec(mg->mg_obj);
1579 mg->mg_obj = Nullsv;
1580 mg->mg_flags &= ~MGf_REFCOUNTED;
1585 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1590 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1595 sv_setsv(LvTARG(sv), sv);
1596 SvSETMAGIC(LvTARG(sv));
1602 Perl_vivify_defelem(pTHX_ SV *sv)
1607 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1610 SV *ahv = LvTARG(sv);
1612 if (SvTYPE(ahv) == SVt_PVHV) {
1613 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1618 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1622 if (!value || value == &PL_sv_undef)
1623 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1626 AV* av = (AV*)LvTARG(sv);
1627 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1628 LvTARG(sv) = Nullsv; /* array can't be extended */
1630 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1631 if (!svp || (value = *svp) == &PL_sv_undef)
1632 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1635 (void)SvREFCNT_inc(value);
1636 SvREFCNT_dec(LvTARG(sv));
1639 SvREFCNT_dec(mg->mg_obj);
1640 mg->mg_obj = Nullsv;
1641 mg->mg_flags &= ~MGf_REFCOUNTED;
1645 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1647 AV *av = (AV*)mg->mg_obj;
1648 SV **svp = AvARRAY(av);
1649 I32 i = AvFILLp(av);
1651 if (svp[i] && svp[i] != &PL_sv_undef) {
1652 if (!SvWEAKREF(svp[i]))
1653 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1654 /* XXX Should we check that it hasn't changed? */
1656 (void)SvOK_off(svp[i]);
1657 SvWEAKREF_off(svp[i]);
1658 svp[i] = &PL_sv_undef;
1666 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1674 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1676 sv_unmagic(sv, PERL_MAGIC_bm);
1682 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1684 sv_unmagic(sv, PERL_MAGIC_fm);
1690 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1692 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1694 if (uf && uf->uf_set)
1695 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1700 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1702 regexp *re = (regexp *)mg->mg_obj;
1707 #ifdef USE_LOCALE_COLLATE
1709 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1712 * RenE<eacute> Descartes said "I think not."
1713 * and vanished with a faint plop.
1716 Safefree(mg->mg_ptr);
1722 #endif /* USE_LOCALE_COLLATE */
1725 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1730 switch (*mg->mg_ptr) {
1731 case '\001': /* ^A */
1732 sv_setsv(PL_bodytarget, sv);
1734 case '\003': /* ^C */
1735 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1738 case '\004': /* ^D */
1739 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1740 DEBUG_x(dump_all());
1742 case '\005': /* ^E */
1743 #ifdef MACOS_TRADITIONAL
1744 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1747 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1750 SetLastError( SvIV(sv) );
1753 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1755 /* will anyone ever use this? */
1756 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1762 case '\006': /* ^F */
1763 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1765 case '\010': /* ^H */
1766 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1768 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1770 Safefree(PL_inplace);
1772 PL_inplace = savepv(SvPV(sv,len));
1774 PL_inplace = Nullch;
1776 case '\017': /* ^O */
1777 if (*(mg->mg_ptr+1) == '\0') {
1779 Safefree(PL_osname);
1781 PL_osname = savepv(SvPV(sv,len));
1785 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1786 if (!PL_compiling.cop_io)
1787 PL_compiling.cop_io = newSVsv(sv);
1789 sv_setsv(PL_compiling.cop_io,sv);
1792 case '\020': /* ^P */
1793 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1794 if (PL_perldb && !PL_DBsingle)
1797 case '\024': /* ^T */
1799 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1801 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1804 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1805 if (*(mg->mg_ptr+1) == '\0') {
1806 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1807 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1808 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1809 | (i ? G_WARN_ON : G_WARN_OFF) ;
1812 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1813 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1814 if (!SvPOK(sv) && PL_localizing) {
1815 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1816 PL_compiling.cop_warnings = pWARN_NONE;
1821 int accumulate = 0 ;
1822 int any_fatals = 0 ;
1823 char * ptr = (char*)SvPV(sv, len) ;
1824 for (i = 0 ; i < len ; ++i) {
1825 accumulate |= ptr[i] ;
1826 any_fatals |= (ptr[i] & 0xAA) ;
1829 PL_compiling.cop_warnings = pWARN_NONE;
1830 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1831 PL_compiling.cop_warnings = pWARN_ALL;
1832 PL_dowarn |= G_WARN_ONCE ;
1835 if (specialWARN(PL_compiling.cop_warnings))
1836 PL_compiling.cop_warnings = newSVsv(sv) ;
1838 sv_setsv(PL_compiling.cop_warnings, sv);
1839 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1840 PL_dowarn |= G_WARN_ONCE ;
1846 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1847 PL_widesyscalls = SvTRUE(sv);
1850 if (PL_localizing) {
1851 if (PL_localizing == 1)
1852 SAVESPTR(PL_last_in_gv);
1854 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1855 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1858 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1859 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1860 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1863 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1864 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1865 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1868 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1871 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1872 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1873 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1876 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1880 IO *io = GvIOp(PL_defoutgv);
1881 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1882 IoFLAGS(io) &= ~IOf_FLUSH;
1884 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1885 PerlIO *ofp = IoOFP(io);
1887 (void)PerlIO_flush(ofp);
1888 IoFLAGS(io) |= IOf_FLUSH;
1894 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1895 PL_multiline = (i != 0);
1898 SvREFCNT_dec(PL_nrs);
1899 PL_nrs = newSVsv(sv);
1900 SvREFCNT_dec(PL_rs);
1901 PL_rs = SvREFCNT_inc(PL_nrs);
1905 SvREFCNT_dec(PL_ors_sv);
1906 if (SvOK(sv) || SvGMAGICAL(sv)) {
1907 PL_ors_sv = newSVsv(sv);
1915 SvREFCNT_dec(PL_ofs_sv);
1916 if (SvOK(sv) || SvGMAGICAL(sv)) {
1917 PL_ofs_sv = newSVsv(sv);
1926 PL_ofmt = savepv(SvPV(sv,len));
1929 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1932 #ifdef COMPLEX_STATUS
1933 if (PL_localizing == 2) {
1934 PL_statusvalue = LvTARGOFF(sv);
1935 PL_statusvalue_vms = LvTARGLEN(sv);
1939 #ifdef VMSISH_STATUS
1941 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1944 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1947 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1948 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1951 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1952 if (PL_delaymagic) {
1953 PL_delaymagic |= DM_RUID;
1954 break; /* don't do magic till later */
1957 (void)setruid((Uid_t)PL_uid);
1960 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1962 #ifdef HAS_SETRESUID
1963 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1965 if (PL_uid == PL_euid) /* special case $< = $> */
1966 (void)PerlProc_setuid(PL_uid);
1968 PL_uid = PerlProc_getuid();
1969 Perl_croak(aTHX_ "setruid() not implemented");
1974 PL_uid = PerlProc_getuid();
1975 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1978 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1979 if (PL_delaymagic) {
1980 PL_delaymagic |= DM_EUID;
1981 break; /* don't do magic till later */
1984 (void)seteuid((Uid_t)PL_euid);
1987 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1989 #ifdef HAS_SETRESUID
1990 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1992 if (PL_euid == PL_uid) /* special case $> = $< */
1993 PerlProc_setuid(PL_euid);
1995 PL_euid = PerlProc_geteuid();
1996 Perl_croak(aTHX_ "seteuid() not implemented");
2001 PL_euid = PerlProc_geteuid();
2002 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2005 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2006 if (PL_delaymagic) {
2007 PL_delaymagic |= DM_RGID;
2008 break; /* don't do magic till later */
2011 (void)setrgid((Gid_t)PL_gid);
2014 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2016 #ifdef HAS_SETRESGID
2017 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2019 if (PL_gid == PL_egid) /* special case $( = $) */
2020 (void)PerlProc_setgid(PL_gid);
2022 PL_gid = PerlProc_getgid();
2023 Perl_croak(aTHX_ "setrgid() not implemented");
2028 PL_gid = PerlProc_getgid();
2029 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2032 #ifdef HAS_SETGROUPS
2034 char *p = SvPV(sv, len);
2035 Groups_t gary[NGROUPS];
2040 for (i = 0; i < NGROUPS; ++i) {
2041 while (*p && !isSPACE(*p))
2050 (void)setgroups(i, gary);
2052 #else /* HAS_SETGROUPS */
2053 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2054 #endif /* HAS_SETGROUPS */
2055 if (PL_delaymagic) {
2056 PL_delaymagic |= DM_EGID;
2057 break; /* don't do magic till later */
2060 (void)setegid((Gid_t)PL_egid);
2063 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2065 #ifdef HAS_SETRESGID
2066 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2068 if (PL_egid == PL_gid) /* special case $) = $( */
2069 (void)PerlProc_setgid(PL_egid);
2071 PL_egid = PerlProc_getegid();
2072 Perl_croak(aTHX_ "setegid() not implemented");
2077 PL_egid = PerlProc_getegid();
2078 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2081 PL_chopset = SvPV_force(sv,len);
2083 #ifndef MACOS_TRADITIONAL
2085 #ifdef HAS_SETPROCTITLE
2086 /* The BSDs don't show the argv[] in ps(1) output, they
2087 * show a string from the process struct and provide
2088 * the setproctitle() routine to manipulate that. */
2091 # if __FreeBSD_version >= 410001
2092 /* The leading "-" removes the "perl: " prefix,
2093 * but not the "(perl) suffix from the ps(1)
2094 * output, because that's what ps(1) shows if the
2095 * argv[] is modified. */
2096 setproctitle("-%s", s, len + 1);
2097 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2098 /* This doesn't really work if you assume that
2099 * $0 = 'foobar'; will wipe out 'perl' from the $0
2100 * because in ps(1) output the result will be like
2101 * sprintf("perl: %s (perl)", s)
2102 * I guess this is a security feature:
2103 * one (a user process) cannot get rid of the original name.
2105 setproctitle("%s", s);
2112 /* See if all the arguments are contiguous in memory */
2113 for (i = 1; i < PL_origargc; i++) {
2114 if (PL_origargv[i] == s + 1
2116 || PL_origargv[i] == s + 2
2121 s += strlen(s); /* this one is ok too */
2126 /* can grab env area too? */
2127 if (PL_origenviron && (PL_origenviron[0] == s + 1
2129 || (PL_origenviron[0] == s + 9 && (s += 8))
2132 my_setenv("NoNe SuCh", Nullch);
2133 /* force copy of environment */
2134 for (i = 0; PL_origenviron[i]; i++)
2135 if (PL_origenviron[i] == s + 1) {
2142 PL_origalen = s - PL_origargv[0];
2144 s = SvPV_force(sv,len);
2146 if (i >= PL_origalen) {
2148 /* don't allow system to limit $0 seen by script */
2149 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2150 Copy(s, PL_origargv[0], i, char);
2151 s = PL_origargv[0]+i;
2155 Copy(s, PL_origargv[0], i, char);
2156 s = PL_origargv[0]+i;
2158 while (++i < PL_origalen)
2160 s = PL_origargv[0]+i;
2161 for (i = 1; i < PL_origargc; i++)
2162 PL_origargv[i] = Nullch;
2168 sv_setsv(thr->errsv, sv);
2170 #endif /* USE_THREADS */
2177 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2179 DEBUG_S(PerlIO_printf(Perl_debug_log,
2180 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2181 PTR2UV(thr), PTR2UV(sv)));
2183 Perl_croak(aTHX_ "panic: magic_mutexfree");
2184 MUTEX_DESTROY(MgMUTEXP(mg));
2185 COND_DESTROY(MgCONDP(mg));
2188 #endif /* USE_THREADS */
2191 Perl_whichsig(pTHX_ char *sig)
2193 register char **sigv;
2195 for (sigv = PL_sig_name+1; *sigv; sigv++)
2196 if (strEQ(sig,*sigv))
2197 return PL_sig_num[sigv - PL_sig_name];
2199 if (strEQ(sig,"CHLD"))
2203 if (strEQ(sig,"CLD"))
2212 Perl_sighandler(int sig)
2214 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2215 dTHXoa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2222 SV *sv = Nullsv, *tSv = PL_Sv;
2226 I32 o_save_i = PL_savestack_ix;
2229 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2230 PERL_SET_THX(aTHXo); /* fake TLS, see above */
2233 if (PL_savestack_ix + 15 <= PL_savestack_max)
2235 if (PL_markstack_ptr < PL_markstack_max - 2)
2237 if (PL_retstack_ix < PL_retstack_max - 2)
2239 if (PL_scopestack_ix < PL_scopestack_max - 3)
2242 if (!PL_psig_ptr[sig])
2243 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2246 /* Max number of items pushed there is 3*n or 4. We cannot fix
2247 infinity, so we fix 4 (in fact 5): */
2249 PL_savestack_ix += 5; /* Protect save in progress. */
2250 o_save_i = PL_savestack_ix;
2251 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2254 PL_markstack_ptr++; /* Protect mark. */
2257 PL_retstack[PL_retstack_ix] = NULL;
2260 PL_scopestack_ix += 1;
2261 /* sv_2cv is too complicated, try a simpler variant first: */
2262 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2263 || SvTYPE(cv) != SVt_PVCV)
2264 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2266 if (!cv || !CvROOT(cv)) {
2267 if (ckWARN(WARN_SIGNAL))
2268 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2269 PL_sig_name[sig], (gv ? GvENAME(gv)
2276 if(PL_psig_name[sig]) {
2277 sv = SvREFCNT_inc(PL_psig_name[sig]);
2281 sv = sv_newmortal();
2282 sv_setpv(sv,PL_sig_name[sig]);
2285 PUSHSTACKi(PERLSI_SIGNAL);
2290 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2293 if (SvTRUE(ERRSV)) {
2295 #ifdef HAS_SIGPROCMASK
2296 /* Handler "died", for example to get out of a restart-able read().
2297 * Before we re-do that on its behalf re-enable the signal which was
2298 * blocked by the system when we entered.
2302 sigaddset(&set,sig);
2303 sigprocmask(SIG_UNBLOCK, &set, NULL);
2305 /* Not clear if this will work */
2306 (void)rsignal(sig, SIG_IGN);
2307 (void)rsignal(sig, &Perl_csighandler);
2309 #endif /* !PERL_MICRO */
2310 Perl_die(aTHX_ Nullch);
2314 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2320 PL_scopestack_ix -= 1;
2323 PL_op = myop; /* Apparently not needed... */
2325 PL_Sv = tSv; /* Restore global temporaries. */
2336 restore_magic(pTHXo_ void *p)
2338 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2339 SV* sv = mgs->mgs_sv;
2344 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2347 SvFLAGS(sv) |= mgs->mgs_flags;
2351 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2354 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2356 /* If we're still on top of the stack, pop us off. (That condition
2357 * will be satisfied if restore_magic was called explicitly, but *not*
2358 * if it's being called via leave_scope.)
2359 * The reason for doing this is that otherwise, things like sv_2cv()
2360 * may leave alloc gunk on the savestack, and some code
2361 * (e.g. sighandler) doesn't expect that...
2363 if (PL_savestack_ix == mgs->mgs_ss_ix)
2365 I32 popval = SSPOPINT;
2366 assert(popval == SAVEt_DESTRUCTOR_X);
2367 PL_savestack_ix -= 2;
2369 assert(popval == SAVEt_ALLOC);
2371 PL_savestack_ix -= popval;
2377 unwind_handler_stack(pTHXo_ void *p)
2379 U32 flags = *(U32*)p;
2382 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2383 /* cxstack_ix-- Not needed, die already unwound it. */
2385 SvREFCNT_dec(sig_sv);