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;
439 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
440 if (rx->startp[0] != -1) {
451 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
452 if (rx->endp[0] != -1) {
453 i = rx->sublen - rx->endp[0];
464 if (!SvPOK(sv) && SvNIOK(sv)) {
474 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
481 switch (*mg->mg_ptr) {
482 case '\001': /* ^A */
483 sv_setsv(sv, PL_bodytarget);
485 case '\003': /* ^C */
486 sv_setiv(sv, (IV)PL_minus_c);
489 case '\004': /* ^D */
490 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
491 #if defined(YYDEBUG) && defined(DEBUGGING)
492 PL_yydebug = DEBUG_p_TEST;
495 case '\005': /* ^E */
496 #ifdef MACOS_TRADITIONAL
500 sv_setnv(sv,(double)gMacPerl_OSErr);
501 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
506 # include <descrip.h>
507 # include <starlet.h>
509 $DESCRIPTOR(msgdsc,msg);
510 sv_setnv(sv,(NV) vaxc$errno);
511 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
512 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
518 if (!(_emx_env & 0x200)) { /* Under DOS */
519 sv_setnv(sv, (NV)errno);
520 sv_setpv(sv, errno ? Strerror(errno) : "");
522 if (errno != errno_isOS2) {
523 int tmp = _syserrno();
524 if (tmp) /* 2nd call to _syserrno() makes it 0 */
527 sv_setnv(sv, (NV)Perl_rc);
528 sv_setpv(sv, os2error(Perl_rc));
533 DWORD dwErr = GetLastError();
534 sv_setnv(sv, (NV)dwErr);
537 PerlProc_GetOSError(sv, dwErr);
544 sv_setnv(sv, (NV)errno);
545 sv_setpv(sv, errno ? Strerror(errno) : "");
550 SvNOK_on(sv); /* what a wonderful hack! */
552 case '\006': /* ^F */
553 sv_setiv(sv, (IV)PL_maxsysfd);
555 case '\010': /* ^H */
556 sv_setiv(sv, (IV)PL_hints);
558 case '\011': /* ^I */ /* NOT \t in EBCDIC */
560 sv_setpv(sv, PL_inplace);
562 sv_setsv(sv, &PL_sv_undef);
564 case '\017': /* ^O & ^OPEN */
565 if (*(mg->mg_ptr+1) == '\0')
566 sv_setpv(sv, PL_osname);
567 else if (strEQ(mg->mg_ptr, "\017PEN")) {
568 if (!PL_compiling.cop_io)
569 sv_setsv(sv, &PL_sv_undef);
571 sv_setsv(sv, PL_compiling.cop_io);
575 case '\020': /* ^P */
576 sv_setiv(sv, (IV)PL_perldb);
578 case '\023': /* ^S */
580 if (PL_lex_state != LEX_NOTPARSING)
583 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
588 case '\024': /* ^T */
590 sv_setnv(sv, PL_basetime);
592 sv_setiv(sv, (IV)PL_basetime);
595 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
596 if (*(mg->mg_ptr+1) == '\0')
597 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
598 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
599 if (PL_compiling.cop_warnings == pWARN_NONE ||
600 PL_compiling.cop_warnings == pWARN_STD)
602 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
604 else if (PL_compiling.cop_warnings == pWARN_ALL) {
605 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
608 sv_setsv(sv, PL_compiling.cop_warnings);
612 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
613 sv_setiv(sv, (IV)PL_widesyscalls);
615 case '1': case '2': case '3': case '4':
616 case '5': case '6': case '7': case '8': case '9': case '&':
617 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
621 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
622 * XXX Does the new way break anything?
624 paren = atoi(mg->mg_ptr); /* $& is in [0] */
626 if (paren <= rx->nparens &&
627 (s1 = rx->startp[paren]) != -1 &&
628 (t1 = rx->endp[paren]) != -1)
637 bool was_tainted = FALSE;
639 was_tainted = PL_tainted;
643 if (PL_reg_sv && DO_UTF8(PL_reg_sv) && is_utf8_string((U8*)s, i))
648 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
653 sv_setsv(sv,&PL_sv_undef);
656 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
657 paren = rx->lastparen;
661 sv_setsv(sv,&PL_sv_undef);
664 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
665 if ((s = rx->subbeg) && rx->startp[0] != -1) {
670 sv_setsv(sv,&PL_sv_undef);
673 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
674 if (rx->subbeg && rx->endp[0] != -1) {
675 s = rx->subbeg + rx->endp[0];
676 i = rx->sublen - rx->endp[0];
680 sv_setsv(sv,&PL_sv_undef);
684 if (GvIO(PL_last_in_gv)) {
685 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
691 sv_setiv(sv, (IV)STATUS_CURRENT);
692 #ifdef COMPLEX_STATUS
693 LvTARGOFF(sv) = PL_statusvalue;
694 LvTARGLEN(sv) = PL_statusvalue_vms;
699 s = IoTOP_NAME(GvIOp(PL_defoutgv));
703 sv_setpv(sv,GvENAME(PL_defoutgv));
708 s = IoFMT_NAME(GvIOp(PL_defoutgv));
710 s = GvENAME(PL_defoutgv);
715 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
718 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
721 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
729 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
732 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
739 sv_setpv(sv,PL_ofmt);
743 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
744 sv_setpv(sv, errno ? Strerror(errno) : "");
747 int saveerrno = errno;
748 sv_setnv(sv, (NV)errno);
750 if (errno == errno_isOS2 || errno == errno_isOS2_set)
751 sv_setpv(sv, os2error(Perl_rc));
754 sv_setpv(sv, errno ? Strerror(errno) : "");
758 SvNOK_on(sv); /* what a wonderful hack! */
761 sv_setiv(sv, (IV)PL_uid);
764 sv_setiv(sv, (IV)PL_euid);
767 sv_setiv(sv, (IV)PL_gid);
769 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
773 sv_setiv(sv, (IV)PL_egid);
775 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
780 Groups_t gary[NGROUPS];
781 i = getgroups(NGROUPS,gary);
783 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
786 (void)SvIOK_on(sv); /* what a wonderful hack! */
790 #ifndef MACOS_TRADITIONAL
796 sv_setsv(sv, thr->errsv);
798 #endif /* USE_THREADS */
804 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
806 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
808 if (uf && uf->uf_val)
809 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
814 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
825 #ifdef DYNAMIC_ENV_FETCH
826 /* We just undefd an environment var. Is a replacement */
827 /* waiting in the wings? */
830 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
831 s = SvPV(*valp, len);
835 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
836 /* And you'll never guess what the dog had */
837 /* in its mouth... */
839 MgTAINTEDDIR_off(mg);
841 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
842 char pathbuf[256], eltbuf[256], *cp, *elt = s;
846 do { /* DCL$PATH may be a search list */
847 while (1) { /* as may dev portion of any element */
848 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
849 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
850 cando_by_name(S_IWUSR,0,elt) ) {
855 if ((cp = strchr(elt, ':')) != Nullch)
857 if (my_trnlnm(elt, eltbuf, j++))
863 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
866 if (s && klen == 4 && strEQ(ptr,"PATH")) {
867 char *strend = s + len;
872 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
875 if (i >= sizeof tmpbuf /* too long -- assume the worst */
877 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
884 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
890 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
893 my_setenv(MgPV(mg,n_a),Nullch);
898 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
901 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
906 magic_clear_all_env(sv,mg);
907 hv_iterinit((HV*)sv);
908 while ((entry = hv_iternext((HV*)sv))) {
910 my_setenv(hv_iterkey(entry, &keylen),
911 SvPV(hv_iterval((HV*)sv, entry), n_a));
919 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
921 #if defined(VMS) || defined(EPOC)
922 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
924 # ifdef PERL_IMPLICIT_SYS
928 char *envv = GetEnvironmentStrings();
932 char *end = strchr(cur,'=');
933 if (end && end != cur) {
935 my_setenv(cur,Nullch);
937 cur = end + strlen(end+1)+2;
939 else if ((len = strlen(cur)))
942 FreeEnvironmentStrings(envv);
944 #ifdef USE_ENVIRON_ARRAY
945 # ifndef PERL_USE_SAFE_PUTENV
948 if (environ == PL_origenviron)
949 environ = (char**)safesysmalloc(sizeof(char*));
951 for (i = 0; environ[i]; i++)
952 safesysfree(environ[i]);
953 # endif /* PERL_USE_SAFE_PUTENV */
957 #endif /* USE_ENVIRON_ARRAY */
959 # endif /* PERL_IMPLICIT_SYS */
966 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
970 /* Are we fetching a signal entry? */
971 i = whichsig(MgPV(mg,n_a));
974 sv_setsv(sv,PL_psig_ptr[i]);
976 Sighandler_t sigstate = rsignal_state(i);
978 /* cache state so we don't fetch it again */
979 if(sigstate == SIG_IGN)
980 sv_setpv(sv,"IGNORE");
982 sv_setsv(sv,&PL_sv_undef);
983 PL_psig_ptr[i] = SvREFCNT_inc(sv);
990 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
994 /* Are we clearing a signal entry? */
995 i = whichsig(MgPV(mg,n_a));
998 SvREFCNT_dec(PL_psig_ptr[i]);
1001 if(PL_psig_name[i]) {
1002 SvREFCNT_dec(PL_psig_name[i]);
1010 Perl_raise_signal(pTHX_ int sig)
1012 /* Set a flag to say this signal is pending */
1013 PL_psig_pend[sig]++;
1014 /* And one to say _a_ signal is pending */
1019 Perl_csighandler(int sig)
1021 #ifdef PERL_OLD_SIGNALS
1022 /* Call the perl level handler now with risk we may be in malloc() etc. */
1023 (*PL_sighandlerp)(sig);
1026 Perl_raise_signal(aTHX_ sig);
1031 Perl_despatch_signals(pTHX)
1035 for (sig = 1; sig < SIG_SIZE; sig++) {
1036 if (PL_psig_pend[sig]) {
1037 PL_psig_pend[sig] = 0;
1038 (*PL_sighandlerp)(sig);
1044 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1053 if (strEQ(s,"__DIE__"))
1055 else if (strEQ(s,"__WARN__"))
1058 Perl_croak(aTHX_ "No such hook: %s", s);
1066 i = whichsig(s); /* ...no, a brick */
1068 if (ckWARN(WARN_SIGNAL))
1069 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1072 SvREFCNT_dec(PL_psig_name[i]);
1073 SvREFCNT_dec(PL_psig_ptr[i]);
1074 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1075 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1076 PL_psig_name[i] = newSVpvn(s, len);
1077 SvREADONLY_on(PL_psig_name[i]);
1079 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1081 (void)rsignal(i, &Perl_csighandler);
1083 *svp = SvREFCNT_inc(sv);
1086 s = SvPV_force(sv,len);
1087 if (strEQ(s,"IGNORE")) {
1089 (void)rsignal(i, SIG_IGN);
1093 else if (strEQ(s,"DEFAULT") || !*s) {
1095 (void)rsignal(i, SIG_DFL);
1101 * We should warn if HINT_STRICT_REFS, but without
1102 * access to a known hint bit in a known OP, we can't
1103 * tell whether HINT_STRICT_REFS is in force or not.
1105 if (!strchr(s,':') && !strchr(s,'\''))
1106 sv_insert(sv, 0, 0, "main::", 6);
1108 (void)rsignal(i, &Perl_csighandler);
1110 *svp = SvREFCNT_inc(sv);
1114 #endif /* !PERL_MICRO */
1117 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1119 PL_sub_generation++;
1124 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1126 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1127 PL_amagic_generation++;
1133 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1135 HV *hv = (HV*)LvTARG(sv);
1140 (void) hv_iterinit(hv);
1141 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1145 while ((entry = hv_iternext(hv))) {
1151 sv_setiv(sv, (IV)i);
1156 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1159 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1164 /* caller is responsible for stack switching/cleanup */
1166 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1172 PUSHs(SvTIED_obj(sv, mg));
1175 if (mg->mg_len >= 0)
1176 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1177 else if (mg->mg_len == HEf_SVKEY)
1178 PUSHs((SV*)mg->mg_ptr);
1180 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1181 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1189 return call_method(meth, flags);
1193 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1199 PUSHSTACKi(PERLSI_MAGIC);
1201 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1202 sv_setsv(sv, *PL_stack_sp--);
1212 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1214 magic_methpack(sv,mg,"FETCH");
1216 mg->mg_flags |= MGf_GSKIP;
1221 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1225 PUSHSTACKi(PERLSI_MAGIC);
1226 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1233 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1235 return magic_methpack(sv,mg,"DELETE");
1240 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1247 PUSHSTACKi(PERLSI_MAGIC);
1248 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1249 sv = *PL_stack_sp--;
1250 retval = (U32) SvIV(sv)-1;
1259 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1264 PUSHSTACKi(PERLSI_MAGIC);
1266 XPUSHs(SvTIED_obj(sv, mg));
1268 call_method("CLEAR", G_SCALAR|G_DISCARD);
1275 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1278 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1282 PUSHSTACKi(PERLSI_MAGIC);
1285 PUSHs(SvTIED_obj(sv, mg));
1290 if (call_method(meth, G_SCALAR))
1291 sv_setsv(key, *PL_stack_sp--);
1300 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1302 return magic_methpack(sv,mg,"EXISTS");
1306 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1316 svp = av_fetch(GvAV(gv),
1317 atoi(MgPV(mg,n_a)), FALSE);
1318 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1324 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1326 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1331 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1333 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1338 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1340 SV* lsv = LvTARG(sv);
1342 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1343 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1344 if (mg && mg->mg_len >= 0) {
1347 sv_pos_b2u(lsv, &i);
1348 sv_setiv(sv, i + PL_curcop->cop_arybase);
1357 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1359 SV* lsv = LvTARG(sv);
1366 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1367 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1371 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1372 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1374 else if (!SvOK(sv)) {
1378 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1380 pos = SvIV(sv) - PL_curcop->cop_arybase;
1383 ulen = sv_len_utf8(lsv);
1398 sv_pos_u2b(lsv, &p, 0);
1403 mg->mg_flags &= ~MGf_MINMATCH;
1409 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1411 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1413 gv_efullname3(sv,((GV*)sv), "*");
1417 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1422 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1431 if (*s == '*' && s[1])
1433 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1438 GvGP(sv) = gp_ref(GvGP(gv));
1443 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1446 SV *lsv = LvTARG(sv);
1447 char *tmps = SvPV(lsv,len);
1448 I32 offs = LvTARGOFF(sv);
1449 I32 rem = LvTARGLEN(sv);
1452 sv_pos_u2b(lsv, &offs, &rem);
1455 if (rem + offs > len)
1457 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1464 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1467 char *tmps = SvPV(sv, len);
1468 SV *lsv = LvTARG(sv);
1469 I32 lvoff = LvTARGOFF(sv);
1470 I32 lvlen = LvTARGLEN(sv);
1473 sv_utf8_upgrade(lsv);
1474 sv_pos_u2b(lsv, &lvoff, &lvlen);
1475 sv_insert(lsv, lvoff, lvlen, tmps, len);
1478 else if (SvUTF8(lsv)) {
1479 sv_pos_u2b(lsv, &lvoff, &lvlen);
1480 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1481 sv_insert(lsv, lvoff, lvlen, tmps, len);
1485 sv_insert(lsv, lvoff, lvlen, tmps, len);
1491 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1493 TAINT_IF((mg->mg_len & 1) ||
1494 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1499 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1501 if (PL_localizing) {
1502 if (PL_localizing == 1)
1507 else if (PL_tainted)
1515 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1517 SV *lsv = LvTARG(sv);
1524 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1529 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1531 do_vecset(sv); /* XXX slurp this routine */
1536 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1539 if (LvTARGLEN(sv)) {
1541 SV *ahv = LvTARG(sv);
1542 if (SvTYPE(ahv) == SVt_PVHV) {
1543 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1548 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1554 AV* av = (AV*)LvTARG(sv);
1555 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1556 targ = AvARRAY(av)[LvTARGOFF(sv)];
1558 if (targ && targ != &PL_sv_undef) {
1559 /* somebody else defined it for us */
1560 SvREFCNT_dec(LvTARG(sv));
1561 LvTARG(sv) = SvREFCNT_inc(targ);
1563 SvREFCNT_dec(mg->mg_obj);
1564 mg->mg_obj = Nullsv;
1565 mg->mg_flags &= ~MGf_REFCOUNTED;
1570 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1575 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1580 sv_setsv(LvTARG(sv), sv);
1581 SvSETMAGIC(LvTARG(sv));
1587 Perl_vivify_defelem(pTHX_ SV *sv)
1592 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1595 SV *ahv = LvTARG(sv);
1597 if (SvTYPE(ahv) == SVt_PVHV) {
1598 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1603 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1607 if (!value || value == &PL_sv_undef)
1608 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1611 AV* av = (AV*)LvTARG(sv);
1612 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1613 LvTARG(sv) = Nullsv; /* array can't be extended */
1615 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1616 if (!svp || (value = *svp) == &PL_sv_undef)
1617 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1620 (void)SvREFCNT_inc(value);
1621 SvREFCNT_dec(LvTARG(sv));
1624 SvREFCNT_dec(mg->mg_obj);
1625 mg->mg_obj = Nullsv;
1626 mg->mg_flags &= ~MGf_REFCOUNTED;
1630 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1632 AV *av = (AV*)mg->mg_obj;
1633 SV **svp = AvARRAY(av);
1634 I32 i = AvFILLp(av);
1636 if (svp[i] && svp[i] != &PL_sv_undef) {
1637 if (!SvWEAKREF(svp[i]))
1638 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1639 /* XXX Should we check that it hasn't changed? */
1641 (void)SvOK_off(svp[i]);
1642 SvWEAKREF_off(svp[i]);
1643 svp[i] = &PL_sv_undef;
1651 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1659 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1661 sv_unmagic(sv, PERL_MAGIC_bm);
1667 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1669 sv_unmagic(sv, PERL_MAGIC_fm);
1675 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1677 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1679 if (uf && uf->uf_set)
1680 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1685 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1687 regexp *re = (regexp *)mg->mg_obj;
1692 #ifdef USE_LOCALE_COLLATE
1694 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1697 * RenE<eacute> Descartes said "I think not."
1698 * and vanished with a faint plop.
1701 Safefree(mg->mg_ptr);
1707 #endif /* USE_LOCALE_COLLATE */
1710 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1715 switch (*mg->mg_ptr) {
1716 case '\001': /* ^A */
1717 sv_setsv(PL_bodytarget, sv);
1719 case '\003': /* ^C */
1720 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1723 case '\004': /* ^D */
1724 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1725 DEBUG_x(dump_all());
1727 case '\005': /* ^E */
1728 #ifdef MACOS_TRADITIONAL
1729 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1732 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1735 SetLastError( SvIV(sv) );
1738 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1740 /* will anyone ever use this? */
1741 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1747 case '\006': /* ^F */
1748 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1750 case '\010': /* ^H */
1751 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1753 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1755 Safefree(PL_inplace);
1757 PL_inplace = savepv(SvPV(sv,len));
1759 PL_inplace = Nullch;
1761 case '\017': /* ^O */
1762 if (*(mg->mg_ptr+1) == '\0') {
1764 Safefree(PL_osname);
1766 PL_osname = savepv(SvPV(sv,len));
1770 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1771 if (!PL_compiling.cop_io)
1772 PL_compiling.cop_io = newSVsv(sv);
1774 sv_setsv(PL_compiling.cop_io,sv);
1777 case '\020': /* ^P */
1778 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1779 if (PL_perldb && !PL_DBsingle)
1782 case '\024': /* ^T */
1784 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1786 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1789 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1790 if (*(mg->mg_ptr+1) == '\0') {
1791 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1792 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1793 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1794 | (i ? G_WARN_ON : G_WARN_OFF) ;
1797 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1798 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1799 if (!SvPOK(sv) && PL_localizing) {
1800 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1801 PL_compiling.cop_warnings = pWARN_NONE;
1806 int accumulate = 0 ;
1807 int any_fatals = 0 ;
1808 char * ptr = (char*)SvPV(sv, len) ;
1809 for (i = 0 ; i < len ; ++i) {
1810 accumulate |= ptr[i] ;
1811 any_fatals |= (ptr[i] & 0xAA) ;
1814 PL_compiling.cop_warnings = pWARN_NONE;
1815 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1816 PL_compiling.cop_warnings = pWARN_ALL;
1817 PL_dowarn |= G_WARN_ONCE ;
1820 if (specialWARN(PL_compiling.cop_warnings))
1821 PL_compiling.cop_warnings = newSVsv(sv) ;
1823 sv_setsv(PL_compiling.cop_warnings, sv);
1824 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1825 PL_dowarn |= G_WARN_ONCE ;
1831 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1832 PL_widesyscalls = SvTRUE(sv);
1835 if (PL_localizing) {
1836 if (PL_localizing == 1)
1837 SAVESPTR(PL_last_in_gv);
1839 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1840 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1843 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1844 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1845 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1848 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1849 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1850 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1853 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1856 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1857 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1858 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1861 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1865 IO *io = GvIOp(PL_defoutgv);
1866 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1867 IoFLAGS(io) &= ~IOf_FLUSH;
1869 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1870 PerlIO *ofp = IoOFP(io);
1872 (void)PerlIO_flush(ofp);
1873 IoFLAGS(io) |= IOf_FLUSH;
1879 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1880 PL_multiline = (i != 0);
1883 SvREFCNT_dec(PL_nrs);
1884 PL_nrs = newSVsv(sv);
1885 SvREFCNT_dec(PL_rs);
1886 PL_rs = SvREFCNT_inc(PL_nrs);
1890 SvREFCNT_dec(PL_ors_sv);
1891 if (SvOK(sv) || SvGMAGICAL(sv)) {
1892 PL_ors_sv = newSVsv(sv);
1900 SvREFCNT_dec(PL_ofs_sv);
1901 if (SvOK(sv) || SvGMAGICAL(sv)) {
1902 PL_ofs_sv = newSVsv(sv);
1911 PL_ofmt = savepv(SvPV(sv,len));
1914 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1917 #ifdef COMPLEX_STATUS
1918 if (PL_localizing == 2) {
1919 PL_statusvalue = LvTARGOFF(sv);
1920 PL_statusvalue_vms = LvTARGLEN(sv);
1924 #ifdef VMSISH_STATUS
1926 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1929 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1932 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1933 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1936 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1937 if (PL_delaymagic) {
1938 PL_delaymagic |= DM_RUID;
1939 break; /* don't do magic till later */
1942 (void)setruid((Uid_t)PL_uid);
1945 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1947 #ifdef HAS_SETRESUID
1948 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1950 if (PL_uid == PL_euid) /* special case $< = $> */
1951 (void)PerlProc_setuid(PL_uid);
1953 PL_uid = PerlProc_getuid();
1954 Perl_croak(aTHX_ "setruid() not implemented");
1959 PL_uid = PerlProc_getuid();
1960 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1963 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1964 if (PL_delaymagic) {
1965 PL_delaymagic |= DM_EUID;
1966 break; /* don't do magic till later */
1969 (void)seteuid((Uid_t)PL_euid);
1972 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1974 #ifdef HAS_SETRESUID
1975 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1977 if (PL_euid == PL_uid) /* special case $> = $< */
1978 PerlProc_setuid(PL_euid);
1980 PL_euid = PerlProc_geteuid();
1981 Perl_croak(aTHX_ "seteuid() not implemented");
1986 PL_euid = PerlProc_geteuid();
1987 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1990 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1991 if (PL_delaymagic) {
1992 PL_delaymagic |= DM_RGID;
1993 break; /* don't do magic till later */
1996 (void)setrgid((Gid_t)PL_gid);
1999 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2001 #ifdef HAS_SETRESGID
2002 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2004 if (PL_gid == PL_egid) /* special case $( = $) */
2005 (void)PerlProc_setgid(PL_gid);
2007 PL_gid = PerlProc_getgid();
2008 Perl_croak(aTHX_ "setrgid() not implemented");
2013 PL_gid = PerlProc_getgid();
2014 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2017 #ifdef HAS_SETGROUPS
2019 char *p = SvPV(sv, len);
2020 Groups_t gary[NGROUPS];
2025 for (i = 0; i < NGROUPS; ++i) {
2026 while (*p && !isSPACE(*p))
2035 (void)setgroups(i, gary);
2037 #else /* HAS_SETGROUPS */
2038 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2039 #endif /* HAS_SETGROUPS */
2040 if (PL_delaymagic) {
2041 PL_delaymagic |= DM_EGID;
2042 break; /* don't do magic till later */
2045 (void)setegid((Gid_t)PL_egid);
2048 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2050 #ifdef HAS_SETRESGID
2051 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2053 if (PL_egid == PL_gid) /* special case $) = $( */
2054 (void)PerlProc_setgid(PL_egid);
2056 PL_egid = PerlProc_getegid();
2057 Perl_croak(aTHX_ "setegid() not implemented");
2062 PL_egid = PerlProc_getegid();
2063 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2066 PL_chopset = SvPV_force(sv,len);
2068 #ifndef MACOS_TRADITIONAL
2070 #ifdef HAS_SETPROCTITLE
2071 /* The BSDs don't show the argv[] in ps(1) output, they
2072 * show a string from the process struct and provide
2073 * the setproctitle() routine to manipulate that. */
2076 # if __FreeBSD_version >= 410001
2077 /* The leading "-" removes the "perl: " prefix,
2078 * but not the "(perl) suffix from the ps(1)
2079 * output, because that's what ps(1) shows if the
2080 * argv[] is modified. */
2081 setproctitle("-%s", s, len + 1);
2082 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2083 /* This doesn't really work if you assume that
2084 * $0 = 'foobar'; will wipe out 'perl' from the $0
2085 * because in ps(1) output the result will be like
2086 * sprintf("perl: %s (perl)", s)
2087 * I guess this is a security feature:
2088 * one (a user process) cannot get rid of the original name.
2090 setproctitle("%s", s);
2097 /* See if all the arguments are contiguous in memory */
2098 for (i = 1; i < PL_origargc; i++) {
2099 if (PL_origargv[i] == s + 1
2101 || PL_origargv[i] == s + 2
2106 s += strlen(s); /* this one is ok too */
2111 /* can grab env area too? */
2112 if (PL_origenviron && (PL_origenviron[0] == s + 1
2114 || (PL_origenviron[0] == s + 9 && (s += 8))
2117 my_setenv("NoNe SuCh", Nullch);
2118 /* force copy of environment */
2119 for (i = 0; PL_origenviron[i]; i++)
2120 if (PL_origenviron[i] == s + 1) {
2127 PL_origalen = s - PL_origargv[0];
2129 s = SvPV_force(sv,len);
2131 if (i >= PL_origalen) {
2133 /* don't allow system to limit $0 seen by script */
2134 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2135 Copy(s, PL_origargv[0], i, char);
2136 s = PL_origargv[0]+i;
2140 Copy(s, PL_origargv[0], i, char);
2141 s = PL_origargv[0]+i;
2143 while (++i < PL_origalen)
2145 s = PL_origargv[0]+i;
2146 for (i = 1; i < PL_origargc; i++)
2147 PL_origargv[i] = Nullch;
2153 sv_setsv(thr->errsv, sv);
2155 #endif /* USE_THREADS */
2162 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2164 DEBUG_S(PerlIO_printf(Perl_debug_log,
2165 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2166 PTR2UV(thr), PTR2UV(sv));)
2168 Perl_croak(aTHX_ "panic: magic_mutexfree");
2169 MUTEX_DESTROY(MgMUTEXP(mg));
2170 COND_DESTROY(MgCONDP(mg));
2173 #endif /* USE_THREADS */
2176 Perl_whichsig(pTHX_ char *sig)
2178 register char **sigv;
2180 for (sigv = PL_sig_name+1; *sigv; sigv++)
2181 if (strEQ(sig,*sigv))
2182 return PL_sig_num[sigv - PL_sig_name];
2184 if (strEQ(sig,"CHLD"))
2188 if (strEQ(sig,"CLD"))
2197 Perl_sighandler(int sig)
2199 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2200 dTHXoa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2207 SV *sv = Nullsv, *tSv = PL_Sv;
2211 I32 o_save_i = PL_savestack_ix;
2214 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2215 PERL_SET_THX(aTHXo); /* fake TLS, see above */
2218 if (PL_savestack_ix + 15 <= PL_savestack_max)
2220 if (PL_markstack_ptr < PL_markstack_max - 2)
2222 if (PL_retstack_ix < PL_retstack_max - 2)
2224 if (PL_scopestack_ix < PL_scopestack_max - 3)
2227 if (!PL_psig_ptr[sig])
2228 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2231 /* Max number of items pushed there is 3*n or 4. We cannot fix
2232 infinity, so we fix 4 (in fact 5): */
2234 PL_savestack_ix += 5; /* Protect save in progress. */
2235 o_save_i = PL_savestack_ix;
2236 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2239 PL_markstack_ptr++; /* Protect mark. */
2242 PL_retstack[PL_retstack_ix] = NULL;
2245 PL_scopestack_ix += 1;
2246 /* sv_2cv is too complicated, try a simpler variant first: */
2247 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2248 || SvTYPE(cv) != SVt_PVCV)
2249 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2251 if (!cv || !CvROOT(cv)) {
2252 if (ckWARN(WARN_SIGNAL))
2253 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2254 PL_sig_name[sig], (gv ? GvENAME(gv)
2261 if(PL_psig_name[sig]) {
2262 sv = SvREFCNT_inc(PL_psig_name[sig]);
2266 sv = sv_newmortal();
2267 sv_setpv(sv,PL_sig_name[sig]);
2270 PUSHSTACKi(PERLSI_SIGNAL);
2275 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2278 if (SvTRUE(ERRSV)) {
2280 #ifdef HAS_SIGPROCMASK
2281 /* Handler "died", for example to get out of a restart-able read().
2282 * Before we re-do that on its behalf re-enable the signal which was
2283 * blocked by the system when we entered.
2287 sigaddset(&set,sig);
2288 sigprocmask(SIG_UNBLOCK, &set, NULL);
2290 /* Not clear if this will work */
2291 (void)rsignal(sig, SIG_IGN);
2292 (void)rsignal(sig, &Perl_csighandler);
2294 #endif /* !PERL_MICRO */
2295 Perl_die(aTHX_ Nullch);
2299 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2305 PL_scopestack_ix -= 1;
2308 PL_op = myop; /* Apparently not needed... */
2310 PL_Sv = tSv; /* Restore global temporaries. */
2321 restore_magic(pTHXo_ void *p)
2323 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2324 SV* sv = mgs->mgs_sv;
2329 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2332 SvFLAGS(sv) |= mgs->mgs_flags;
2336 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2339 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2341 /* If we're still on top of the stack, pop us off. (That condition
2342 * will be satisfied if restore_magic was called explicitly, but *not*
2343 * if it's being called via leave_scope.)
2344 * The reason for doing this is that otherwise, things like sv_2cv()
2345 * may leave alloc gunk on the savestack, and some code
2346 * (e.g. sighandler) doesn't expect that...
2348 if (PL_savestack_ix == mgs->mgs_ss_ix)
2350 I32 popval = SSPOPINT;
2351 assert(popval == SAVEt_DESTRUCTOR_X);
2352 PL_savestack_ix -= 2;
2354 assert(popval == SAVEt_ALLOC);
2356 PL_savestack_ix -= popval;
2362 unwind_handler_stack(pTHXo_ void *p)
2364 U32 flags = *(U32*)p;
2367 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2368 /* cxstack_ix-- Not needed, die already unwound it. */
2370 SvREFCNT_dec(sig_sv);