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)
174 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
175 MGVTBL* vtbl = mg->mg_virtual;
176 if (vtbl && vtbl->svt_len) {
179 mgs_ix = SSNEW(sizeof(MGS));
180 save_magic(mgs_ix, sv);
181 /* omit MGf_GSKIP -- not changed here */
182 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
183 restore_magic(aTHXo_ INT2PTR(void*, (IV)mgs_ix));
190 U8 *s = (U8*)SvPV(sv, len);
191 len = Perl_utf8_length(aTHX_ s, s + len);
199 Perl_mg_size(pTHX_ SV *sv)
204 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
205 MGVTBL* vtbl = mg->mg_virtual;
206 if (vtbl && vtbl->svt_len) {
209 mgs_ix = SSNEW(sizeof(MGS));
210 save_magic(mgs_ix, sv);
211 /* omit MGf_GSKIP -- not changed here */
212 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
213 restore_magic(aTHXo_ INT2PTR(void*, (IV)mgs_ix));
220 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
225 Perl_croak(aTHX_ "Size magic not implemented");
234 Clear something magical that the SV represents. See C<sv_magic>.
240 Perl_mg_clear(pTHX_ SV *sv)
245 mgs_ix = SSNEW(sizeof(MGS));
246 save_magic(mgs_ix, sv);
248 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
249 MGVTBL* vtbl = mg->mg_virtual;
250 /* omit GSKIP -- never set here */
252 if (vtbl && vtbl->svt_clear)
253 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
256 restore_magic(aTHXo_ INT2PTR(void*, (IV)mgs_ix));
263 Finds the magic pointer for type matching the SV. See C<sv_magic>.
269 Perl_mg_find(pTHX_ SV *sv, int type)
274 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
275 if (mg->mg_type == type)
284 Copies the magic from one SV to another. See C<sv_magic>.
290 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
294 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
295 if (isUPPER(mg->mg_type)) {
297 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
298 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
300 toLOWER(mg->mg_type), key, klen);
310 Free any magic storage used by the SV. See C<sv_magic>.
316 Perl_mg_free(pTHX_ SV *sv)
320 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
321 MGVTBL* vtbl = mg->mg_virtual;
322 moremagic = mg->mg_moremagic;
323 if (vtbl && vtbl->svt_free)
324 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
325 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
327 Safefree(mg->mg_ptr);
328 else if (mg->mg_len == HEf_SVKEY)
329 SvREFCNT_dec((SV*)mg->mg_ptr);
331 if (mg->mg_flags & MGf_REFCOUNTED)
332 SvREFCNT_dec(mg->mg_obj);
340 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
345 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
349 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
350 if (mg->mg_obj) /* @+ */
353 return rx->lastparen;
360 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
368 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
372 if (paren <= rx->nparens &&
373 (s = rx->startp[paren]) != -1 &&
374 (t = rx->endp[paren]) != -1)
376 if (mg->mg_obj) /* @+ */
381 if (i > 0 && DO_UTF8(PL_reg_sv)) {
382 char *b = rx->subbeg;
384 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
394 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
396 Perl_croak(aTHX_ PL_no_modify);
402 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
409 switch (*mg->mg_ptr) {
410 case '1': case '2': case '3': case '4':
411 case '5': case '6': case '7': case '8': case '9': case '&':
412 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
414 paren = atoi(mg->mg_ptr); /* $& is in [0] */
416 if (paren <= rx->nparens &&
417 (s1 = rx->startp[paren]) != -1 &&
418 (t1 = rx->endp[paren]) != -1)
422 if (i > 0 && DO_UTF8(PL_reg_sv)) {
423 char *s = rx->subbeg + s1;
424 char *send = rx->subbeg + t1;
427 if (is_utf8_string((U8*)s, i))
428 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
431 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
437 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
438 paren = rx->lastparen;
443 case '\016': /* ^N */
444 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
445 paren = rx->lastcloseparen;
451 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
452 if (rx->startp[0] != -1) {
463 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
464 if (rx->endp[0] != -1) {
465 i = rx->sublen - rx->endp[0];
476 if (!SvPOK(sv) && SvNIOK(sv)) {
486 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
493 switch (*mg->mg_ptr) {
494 case '\001': /* ^A */
495 sv_setsv(sv, PL_bodytarget);
497 case '\003': /* ^C */
498 sv_setiv(sv, (IV)PL_minus_c);
501 case '\004': /* ^D */
502 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
503 #if defined(YYDEBUG) && defined(DEBUGGING)
504 PL_yydebug = DEBUG_p_TEST;
507 case '\005': /* ^E */
508 #ifdef MACOS_TRADITIONAL
512 sv_setnv(sv,(double)gMacPerl_OSErr);
513 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
518 # include <descrip.h>
519 # include <starlet.h>
521 $DESCRIPTOR(msgdsc,msg);
522 sv_setnv(sv,(NV) vaxc$errno);
523 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
524 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
530 if (!(_emx_env & 0x200)) { /* Under DOS */
531 sv_setnv(sv, (NV)errno);
532 sv_setpv(sv, errno ? Strerror(errno) : "");
534 if (errno != errno_isOS2) {
535 int tmp = _syserrno();
536 if (tmp) /* 2nd call to _syserrno() makes it 0 */
539 sv_setnv(sv, (NV)Perl_rc);
540 sv_setpv(sv, os2error(Perl_rc));
545 DWORD dwErr = GetLastError();
546 sv_setnv(sv, (NV)dwErr);
549 PerlProc_GetOSError(sv, dwErr);
556 sv_setnv(sv, (NV)errno);
557 sv_setpv(sv, errno ? Strerror(errno) : "");
562 SvNOK_on(sv); /* what a wonderful hack! */
564 case '\006': /* ^F */
565 sv_setiv(sv, (IV)PL_maxsysfd);
567 case '\010': /* ^H */
568 sv_setiv(sv, (IV)PL_hints);
570 case '\011': /* ^I */ /* NOT \t in EBCDIC */
572 sv_setpv(sv, PL_inplace);
574 sv_setsv(sv, &PL_sv_undef);
576 case '\017': /* ^O & ^OPEN */
577 if (*(mg->mg_ptr+1) == '\0')
578 sv_setpv(sv, PL_osname);
579 else if (strEQ(mg->mg_ptr, "\017PEN")) {
580 if (!PL_compiling.cop_io)
581 sv_setsv(sv, &PL_sv_undef);
583 sv_setsv(sv, PL_compiling.cop_io);
587 case '\020': /* ^P */
588 sv_setiv(sv, (IV)PL_perldb);
590 case '\023': /* ^S */
592 if (PL_lex_state != LEX_NOTPARSING)
595 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
600 case '\024': /* ^T */
602 sv_setnv(sv, PL_basetime);
604 sv_setiv(sv, (IV)PL_basetime);
607 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
608 if (*(mg->mg_ptr+1) == '\0')
609 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
610 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
611 if (PL_compiling.cop_warnings == pWARN_NONE ||
612 PL_compiling.cop_warnings == pWARN_STD)
614 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
616 else if (PL_compiling.cop_warnings == pWARN_ALL) {
617 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
620 sv_setsv(sv, PL_compiling.cop_warnings);
624 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
625 sv_setiv(sv, (IV)PL_widesyscalls);
627 case '1': case '2': case '3': case '4':
628 case '5': case '6': case '7': case '8': case '9': case '&':
629 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
633 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
634 * XXX Does the new way break anything?
636 paren = atoi(mg->mg_ptr); /* $& is in [0] */
638 if (paren <= rx->nparens &&
639 (s1 = rx->startp[paren]) != -1 &&
640 (t1 = rx->endp[paren]) != -1)
649 bool was_tainted = FALSE;
651 was_tainted = PL_tainted;
655 if (PL_reg_sv && DO_UTF8(PL_reg_sv) && is_utf8_string((U8*)s, i))
660 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
665 sv_setsv(sv,&PL_sv_undef);
668 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
669 paren = rx->lastparen;
673 sv_setsv(sv,&PL_sv_undef);
675 case '\016': /* ^N */
676 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
677 paren = rx->lastcloseparen;
681 sv_setsv(sv,&PL_sv_undef);
684 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
685 if ((s = rx->subbeg) && rx->startp[0] != -1) {
690 sv_setsv(sv,&PL_sv_undef);
693 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
694 if (rx->subbeg && rx->endp[0] != -1) {
695 s = rx->subbeg + rx->endp[0];
696 i = rx->sublen - rx->endp[0];
700 sv_setsv(sv,&PL_sv_undef);
704 if (GvIO(PL_last_in_gv)) {
705 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
711 sv_setiv(sv, (IV)STATUS_CURRENT);
712 #ifdef COMPLEX_STATUS
713 LvTARGOFF(sv) = PL_statusvalue;
714 LvTARGLEN(sv) = PL_statusvalue_vms;
719 s = IoTOP_NAME(GvIOp(PL_defoutgv));
723 sv_setpv(sv,GvENAME(PL_defoutgv));
728 s = IoFMT_NAME(GvIOp(PL_defoutgv));
730 s = GvENAME(PL_defoutgv);
735 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
738 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
741 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
749 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
752 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
759 sv_setpv(sv,PL_ofmt);
763 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
764 sv_setpv(sv, errno ? Strerror(errno) : "");
767 int saveerrno = errno;
768 sv_setnv(sv, (NV)errno);
770 if (errno == errno_isOS2 || errno == errno_isOS2_set)
771 sv_setpv(sv, os2error(Perl_rc));
774 sv_setpv(sv, errno ? Strerror(errno) : "");
778 SvNOK_on(sv); /* what a wonderful hack! */
781 sv_setiv(sv, (IV)PL_uid);
784 sv_setiv(sv, (IV)PL_euid);
787 sv_setiv(sv, (IV)PL_gid);
789 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
793 sv_setiv(sv, (IV)PL_egid);
795 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
800 Groups_t gary[NGROUPS];
801 i = getgroups(NGROUPS,gary);
803 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
806 (void)SvIOK_on(sv); /* what a wonderful hack! */
810 #ifndef MACOS_TRADITIONAL
816 sv_setsv(sv, thr->errsv);
818 #endif /* USE_THREADS */
824 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
826 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
828 if (uf && uf->uf_val)
829 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
834 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
845 #ifdef DYNAMIC_ENV_FETCH
846 /* We just undefd an environment var. Is a replacement */
847 /* waiting in the wings? */
850 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
851 s = SvPV(*valp, len);
855 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
856 /* And you'll never guess what the dog had */
857 /* in its mouth... */
859 MgTAINTEDDIR_off(mg);
861 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
862 char pathbuf[256], eltbuf[256], *cp, *elt = s;
866 do { /* DCL$PATH may be a search list */
867 while (1) { /* as may dev portion of any element */
868 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
869 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
870 cando_by_name(S_IWUSR,0,elt) ) {
875 if ((cp = strchr(elt, ':')) != Nullch)
877 if (my_trnlnm(elt, eltbuf, j++))
883 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
886 if (s && klen == 4 && strEQ(ptr,"PATH")) {
887 char *strend = s + len;
892 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
895 if (i >= sizeof tmpbuf /* too long -- assume the worst */
897 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
904 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
910 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
913 my_setenv(MgPV(mg,n_a),Nullch);
918 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
921 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
926 magic_clear_all_env(sv,mg);
927 hv_iterinit((HV*)sv);
928 while ((entry = hv_iternext((HV*)sv))) {
930 my_setenv(hv_iterkey(entry, &keylen),
931 SvPV(hv_iterval((HV*)sv, entry), n_a));
939 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
941 #if defined(VMS) || defined(EPOC)
942 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
944 # ifdef PERL_IMPLICIT_SYS
948 char *envv = GetEnvironmentStrings();
952 char *end = strchr(cur,'=');
953 if (end && end != cur) {
955 my_setenv(cur,Nullch);
957 cur = end + strlen(end+1)+2;
959 else if ((len = strlen(cur)))
962 FreeEnvironmentStrings(envv);
964 #ifdef USE_ENVIRON_ARRAY
965 # ifndef PERL_USE_SAFE_PUTENV
968 if (environ == PL_origenviron)
969 environ = (char**)safesysmalloc(sizeof(char*));
971 for (i = 0; environ[i]; i++)
972 safesysfree(environ[i]);
973 # endif /* PERL_USE_SAFE_PUTENV */
977 #endif /* USE_ENVIRON_ARRAY */
979 # endif /* PERL_IMPLICIT_SYS */
986 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
990 /* Are we fetching a signal entry? */
991 i = whichsig(MgPV(mg,n_a));
994 sv_setsv(sv,PL_psig_ptr[i]);
996 Sighandler_t sigstate = rsignal_state(i);
998 /* cache state so we don't fetch it again */
999 if(sigstate == SIG_IGN)
1000 sv_setpv(sv,"IGNORE");
1002 sv_setsv(sv,&PL_sv_undef);
1003 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1010 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1014 /* Are we clearing a signal entry? */
1015 i = whichsig(MgPV(mg,n_a));
1017 if(PL_psig_ptr[i]) {
1018 SvREFCNT_dec(PL_psig_ptr[i]);
1021 if(PL_psig_name[i]) {
1022 SvREFCNT_dec(PL_psig_name[i]);
1030 Perl_raise_signal(pTHX_ int sig)
1032 /* Set a flag to say this signal is pending */
1033 PL_psig_pend[sig]++;
1034 /* And one to say _a_ signal is pending */
1039 Perl_csighandler(int sig)
1041 #ifdef PERL_OLD_SIGNALS
1042 /* Call the perl level handler now with risk we may be in malloc() etc. */
1043 (*PL_sighandlerp)(sig);
1046 Perl_raise_signal(aTHX_ sig);
1051 Perl_despatch_signals(pTHX)
1055 for (sig = 1; sig < SIG_SIZE; sig++) {
1056 if (PL_psig_pend[sig]) {
1057 PL_psig_pend[sig] = 0;
1058 (*PL_sighandlerp)(sig);
1064 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1073 if (strEQ(s,"__DIE__"))
1075 else if (strEQ(s,"__WARN__"))
1078 Perl_croak(aTHX_ "No such hook: %s", s);
1086 i = whichsig(s); /* ...no, a brick */
1088 if (ckWARN(WARN_SIGNAL))
1089 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1092 SvREFCNT_dec(PL_psig_name[i]);
1093 SvREFCNT_dec(PL_psig_ptr[i]);
1094 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1095 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1096 PL_psig_name[i] = newSVpvn(s, len);
1097 SvREADONLY_on(PL_psig_name[i]);
1099 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1101 (void)rsignal(i, &Perl_csighandler);
1103 *svp = SvREFCNT_inc(sv);
1106 s = SvPV_force(sv,len);
1107 if (strEQ(s,"IGNORE")) {
1109 (void)rsignal(i, SIG_IGN);
1113 else if (strEQ(s,"DEFAULT") || !*s) {
1115 (void)rsignal(i, SIG_DFL);
1121 * We should warn if HINT_STRICT_REFS, but without
1122 * access to a known hint bit in a known OP, we can't
1123 * tell whether HINT_STRICT_REFS is in force or not.
1125 if (!strchr(s,':') && !strchr(s,'\''))
1126 sv_insert(sv, 0, 0, "main::", 6);
1128 (void)rsignal(i, &Perl_csighandler);
1130 *svp = SvREFCNT_inc(sv);
1134 #endif /* !PERL_MICRO */
1137 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1139 PL_sub_generation++;
1144 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1146 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1147 PL_amagic_generation++;
1153 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1155 HV *hv = (HV*)LvTARG(sv);
1159 (void) hv_iterinit(hv);
1160 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1163 while (hv_iternext(hv))
1168 sv_setiv(sv, (IV)i);
1173 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1176 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1181 /* caller is responsible for stack switching/cleanup */
1183 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1189 PUSHs(SvTIED_obj(sv, mg));
1192 if (mg->mg_len >= 0)
1193 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1194 else if (mg->mg_len == HEf_SVKEY)
1195 PUSHs((SV*)mg->mg_ptr);
1197 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1198 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1206 return call_method(meth, flags);
1210 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1216 PUSHSTACKi(PERLSI_MAGIC);
1218 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1219 sv_setsv(sv, *PL_stack_sp--);
1229 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1231 magic_methpack(sv,mg,"FETCH");
1233 mg->mg_flags |= MGf_GSKIP;
1238 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1242 PUSHSTACKi(PERLSI_MAGIC);
1243 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1250 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1252 return magic_methpack(sv,mg,"DELETE");
1257 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1264 PUSHSTACKi(PERLSI_MAGIC);
1265 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1266 sv = *PL_stack_sp--;
1267 retval = (U32) SvIV(sv)-1;
1276 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1281 PUSHSTACKi(PERLSI_MAGIC);
1283 XPUSHs(SvTIED_obj(sv, mg));
1285 call_method("CLEAR", G_SCALAR|G_DISCARD);
1292 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1295 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1299 PUSHSTACKi(PERLSI_MAGIC);
1302 PUSHs(SvTIED_obj(sv, mg));
1307 if (call_method(meth, G_SCALAR))
1308 sv_setsv(key, *PL_stack_sp--);
1317 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1319 return magic_methpack(sv,mg,"EXISTS");
1323 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1333 svp = av_fetch(GvAV(gv),
1334 atoi(MgPV(mg,n_a)), FALSE);
1335 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1341 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1343 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1348 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1350 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1355 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1357 SV* lsv = LvTARG(sv);
1359 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1360 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1361 if (mg && mg->mg_len >= 0) {
1364 sv_pos_b2u(lsv, &i);
1365 sv_setiv(sv, i + PL_curcop->cop_arybase);
1374 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1376 SV* lsv = LvTARG(sv);
1383 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1384 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1388 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1389 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1391 else if (!SvOK(sv)) {
1395 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1397 pos = SvIV(sv) - PL_curcop->cop_arybase;
1400 ulen = sv_len_utf8(lsv);
1415 sv_pos_u2b(lsv, &p, 0);
1420 mg->mg_flags &= ~MGf_MINMATCH;
1426 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1428 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1430 gv_efullname3(sv,((GV*)sv), "*");
1434 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1439 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1448 if (*s == '*' && s[1])
1450 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1455 GvGP(sv) = gp_ref(GvGP(gv));
1460 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1463 SV *lsv = LvTARG(sv);
1464 char *tmps = SvPV(lsv,len);
1465 I32 offs = LvTARGOFF(sv);
1466 I32 rem = LvTARGLEN(sv);
1469 sv_pos_u2b(lsv, &offs, &rem);
1472 if (rem + offs > len)
1474 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1481 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1484 char *tmps = SvPV(sv, len);
1485 SV *lsv = LvTARG(sv);
1486 I32 lvoff = LvTARGOFF(sv);
1487 I32 lvlen = LvTARGLEN(sv);
1490 sv_utf8_upgrade(lsv);
1491 sv_pos_u2b(lsv, &lvoff, &lvlen);
1492 sv_insert(lsv, lvoff, lvlen, tmps, len);
1495 else if (SvUTF8(lsv)) {
1496 sv_pos_u2b(lsv, &lvoff, &lvlen);
1497 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1498 sv_insert(lsv, lvoff, lvlen, tmps, len);
1502 sv_insert(lsv, lvoff, lvlen, tmps, len);
1508 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1510 TAINT_IF((mg->mg_len & 1) ||
1511 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1516 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1518 if (PL_localizing) {
1519 if (PL_localizing == 1)
1524 else if (PL_tainted)
1532 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1534 SV *lsv = LvTARG(sv);
1541 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1546 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1548 do_vecset(sv); /* XXX slurp this routine */
1553 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1556 if (LvTARGLEN(sv)) {
1558 SV *ahv = LvTARG(sv);
1559 if (SvTYPE(ahv) == SVt_PVHV) {
1560 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1565 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1571 AV* av = (AV*)LvTARG(sv);
1572 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1573 targ = AvARRAY(av)[LvTARGOFF(sv)];
1575 if (targ && targ != &PL_sv_undef) {
1576 /* somebody else defined it for us */
1577 SvREFCNT_dec(LvTARG(sv));
1578 LvTARG(sv) = SvREFCNT_inc(targ);
1580 SvREFCNT_dec(mg->mg_obj);
1581 mg->mg_obj = Nullsv;
1582 mg->mg_flags &= ~MGf_REFCOUNTED;
1587 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1592 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1597 sv_setsv(LvTARG(sv), sv);
1598 SvSETMAGIC(LvTARG(sv));
1604 Perl_vivify_defelem(pTHX_ SV *sv)
1609 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1612 SV *ahv = LvTARG(sv);
1614 if (SvTYPE(ahv) == SVt_PVHV) {
1615 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1620 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1624 if (!value || value == &PL_sv_undef)
1625 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1628 AV* av = (AV*)LvTARG(sv);
1629 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1630 LvTARG(sv) = Nullsv; /* array can't be extended */
1632 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1633 if (!svp || (value = *svp) == &PL_sv_undef)
1634 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1637 (void)SvREFCNT_inc(value);
1638 SvREFCNT_dec(LvTARG(sv));
1641 SvREFCNT_dec(mg->mg_obj);
1642 mg->mg_obj = Nullsv;
1643 mg->mg_flags &= ~MGf_REFCOUNTED;
1647 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1649 AV *av = (AV*)mg->mg_obj;
1650 SV **svp = AvARRAY(av);
1651 I32 i = AvFILLp(av);
1653 if (svp[i] && svp[i] != &PL_sv_undef) {
1654 if (!SvWEAKREF(svp[i]))
1655 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1656 /* XXX Should we check that it hasn't changed? */
1658 (void)SvOK_off(svp[i]);
1659 SvWEAKREF_off(svp[i]);
1660 svp[i] = &PL_sv_undef;
1668 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1676 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1678 sv_unmagic(sv, PERL_MAGIC_bm);
1684 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1686 sv_unmagic(sv, PERL_MAGIC_fm);
1692 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1694 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1696 if (uf && uf->uf_set)
1697 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1702 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1704 regexp *re = (regexp *)mg->mg_obj;
1709 #ifdef USE_LOCALE_COLLATE
1711 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1714 * RenE<eacute> Descartes said "I think not."
1715 * and vanished with a faint plop.
1718 Safefree(mg->mg_ptr);
1724 #endif /* USE_LOCALE_COLLATE */
1727 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1732 switch (*mg->mg_ptr) {
1733 case '\001': /* ^A */
1734 sv_setsv(PL_bodytarget, sv);
1736 case '\003': /* ^C */
1737 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1740 case '\004': /* ^D */
1741 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1742 DEBUG_x(dump_all());
1744 case '\005': /* ^E */
1745 #ifdef MACOS_TRADITIONAL
1746 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1749 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1752 SetLastError( SvIV(sv) );
1755 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1757 /* will anyone ever use this? */
1758 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1764 case '\006': /* ^F */
1765 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1767 case '\010': /* ^H */
1768 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1770 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1772 Safefree(PL_inplace);
1774 PL_inplace = savepv(SvPV(sv,len));
1776 PL_inplace = Nullch;
1778 case '\017': /* ^O */
1779 if (*(mg->mg_ptr+1) == '\0') {
1781 Safefree(PL_osname);
1783 PL_osname = savepv(SvPV(sv,len));
1787 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1788 if (!PL_compiling.cop_io)
1789 PL_compiling.cop_io = newSVsv(sv);
1791 sv_setsv(PL_compiling.cop_io,sv);
1794 case '\020': /* ^P */
1795 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1796 if (PL_perldb && !PL_DBsingle)
1799 case '\024': /* ^T */
1801 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1803 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1806 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1807 if (*(mg->mg_ptr+1) == '\0') {
1808 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1809 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1810 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1811 | (i ? G_WARN_ON : G_WARN_OFF) ;
1814 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1815 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1816 if (!SvPOK(sv) && PL_localizing) {
1817 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1818 PL_compiling.cop_warnings = pWARN_NONE;
1823 int accumulate = 0 ;
1824 int any_fatals = 0 ;
1825 char * ptr = (char*)SvPV(sv, len) ;
1826 for (i = 0 ; i < len ; ++i) {
1827 accumulate |= ptr[i] ;
1828 any_fatals |= (ptr[i] & 0xAA) ;
1831 PL_compiling.cop_warnings = pWARN_NONE;
1832 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1833 PL_compiling.cop_warnings = pWARN_ALL;
1834 PL_dowarn |= G_WARN_ONCE ;
1837 if (specialWARN(PL_compiling.cop_warnings))
1838 PL_compiling.cop_warnings = newSVsv(sv) ;
1840 sv_setsv(PL_compiling.cop_warnings, sv);
1841 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1842 PL_dowarn |= G_WARN_ONCE ;
1848 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1849 PL_widesyscalls = SvTRUE(sv);
1852 if (PL_localizing) {
1853 if (PL_localizing == 1)
1854 SAVESPTR(PL_last_in_gv);
1856 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1857 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1860 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1861 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1862 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1865 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1866 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1867 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1870 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1873 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1874 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1875 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1878 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1882 IO *io = GvIOp(PL_defoutgv);
1883 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1884 IoFLAGS(io) &= ~IOf_FLUSH;
1886 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1887 PerlIO *ofp = IoOFP(io);
1889 (void)PerlIO_flush(ofp);
1890 IoFLAGS(io) |= IOf_FLUSH;
1896 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1897 PL_multiline = (i != 0);
1900 SvREFCNT_dec(PL_nrs);
1901 PL_nrs = newSVsv(sv);
1902 SvREFCNT_dec(PL_rs);
1903 PL_rs = SvREFCNT_inc(PL_nrs);
1907 SvREFCNT_dec(PL_ors_sv);
1908 if (SvOK(sv) || SvGMAGICAL(sv)) {
1909 PL_ors_sv = newSVsv(sv);
1917 SvREFCNT_dec(PL_ofs_sv);
1918 if (SvOK(sv) || SvGMAGICAL(sv)) {
1919 PL_ofs_sv = newSVsv(sv);
1928 PL_ofmt = savepv(SvPV(sv,len));
1931 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1934 #ifdef COMPLEX_STATUS
1935 if (PL_localizing == 2) {
1936 PL_statusvalue = LvTARGOFF(sv);
1937 PL_statusvalue_vms = LvTARGLEN(sv);
1941 #ifdef VMSISH_STATUS
1943 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1946 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1949 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1950 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1953 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1954 if (PL_delaymagic) {
1955 PL_delaymagic |= DM_RUID;
1956 break; /* don't do magic till later */
1959 (void)setruid((Uid_t)PL_uid);
1962 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1964 #ifdef HAS_SETRESUID
1965 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1967 if (PL_uid == PL_euid) /* special case $< = $> */
1968 (void)PerlProc_setuid(PL_uid);
1970 PL_uid = PerlProc_getuid();
1971 Perl_croak(aTHX_ "setruid() not implemented");
1976 PL_uid = PerlProc_getuid();
1977 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1980 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1981 if (PL_delaymagic) {
1982 PL_delaymagic |= DM_EUID;
1983 break; /* don't do magic till later */
1986 (void)seteuid((Uid_t)PL_euid);
1989 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1991 #ifdef HAS_SETRESUID
1992 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1994 if (PL_euid == PL_uid) /* special case $> = $< */
1995 PerlProc_setuid(PL_euid);
1997 PL_euid = PerlProc_geteuid();
1998 Perl_croak(aTHX_ "seteuid() not implemented");
2003 PL_euid = PerlProc_geteuid();
2004 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2007 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2008 if (PL_delaymagic) {
2009 PL_delaymagic |= DM_RGID;
2010 break; /* don't do magic till later */
2013 (void)setrgid((Gid_t)PL_gid);
2016 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2018 #ifdef HAS_SETRESGID
2019 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2021 if (PL_gid == PL_egid) /* special case $( = $) */
2022 (void)PerlProc_setgid(PL_gid);
2024 PL_gid = PerlProc_getgid();
2025 Perl_croak(aTHX_ "setrgid() not implemented");
2030 PL_gid = PerlProc_getgid();
2031 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2034 #ifdef HAS_SETGROUPS
2036 char *p = SvPV(sv, len);
2037 Groups_t gary[NGROUPS];
2042 for (i = 0; i < NGROUPS; ++i) {
2043 while (*p && !isSPACE(*p))
2052 (void)setgroups(i, gary);
2054 #else /* HAS_SETGROUPS */
2055 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2056 #endif /* HAS_SETGROUPS */
2057 if (PL_delaymagic) {
2058 PL_delaymagic |= DM_EGID;
2059 break; /* don't do magic till later */
2062 (void)setegid((Gid_t)PL_egid);
2065 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2067 #ifdef HAS_SETRESGID
2068 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2070 if (PL_egid == PL_gid) /* special case $) = $( */
2071 (void)PerlProc_setgid(PL_egid);
2073 PL_egid = PerlProc_getegid();
2074 Perl_croak(aTHX_ "setegid() not implemented");
2079 PL_egid = PerlProc_getegid();
2080 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2083 PL_chopset = SvPV_force(sv,len);
2085 #ifndef MACOS_TRADITIONAL
2087 #ifdef HAS_SETPROCTITLE
2088 /* The BSDs don't show the argv[] in ps(1) output, they
2089 * show a string from the process struct and provide
2090 * the setproctitle() routine to manipulate that. */
2093 # if __FreeBSD_version > 410001
2094 /* The leading "-" removes the "perl: " prefix,
2095 * but not the "(perl) suffix from the ps(1)
2096 * output, because that's what ps(1) shows if the
2097 * argv[] is modified. */
2098 setproctitle("-%s", s);
2099 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2100 /* This doesn't really work if you assume that
2101 * $0 = 'foobar'; will wipe out 'perl' from the $0
2102 * because in ps(1) output the result will be like
2103 * sprintf("perl: %s (perl)", s)
2104 * I guess this is a security feature:
2105 * one (a user process) cannot get rid of the original name.
2107 setproctitle("%s", s);
2114 /* See if all the arguments are contiguous in memory */
2115 for (i = 1; i < PL_origargc; i++) {
2116 if (PL_origargv[i] == s + 1
2118 || PL_origargv[i] == s + 2
2123 s += strlen(s); /* this one is ok too */
2128 /* can grab env area too? */
2129 if (PL_origenviron && (PL_origenviron[0] == s + 1)) {
2130 my_setenv("NoNe SuCh", Nullch);
2131 /* force copy of environment */
2132 for (i = 0; PL_origenviron[i]; i++)
2133 if (PL_origenviron[i] == s + 1) {
2140 PL_origalen = s - PL_origargv[0];
2142 s = SvPV_force(sv,len);
2144 if (i >= PL_origalen) {
2146 /* don't allow system to limit $0 seen by script */
2147 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2148 Copy(s, PL_origargv[0], i, char);
2149 s = PL_origargv[0]+i;
2153 Copy(s, PL_origargv[0], i, char);
2154 s = PL_origargv[0]+i;
2156 while (++i < PL_origalen)
2158 s = PL_origargv[0]+i;
2159 for (i = 1; i < PL_origargc; i++)
2160 PL_origargv[i] = Nullch;
2166 sv_setsv(thr->errsv, sv);
2168 #endif /* USE_THREADS */
2175 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2177 DEBUG_S(PerlIO_printf(Perl_debug_log,
2178 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2179 PTR2UV(thr), PTR2UV(sv)));
2181 Perl_croak(aTHX_ "panic: magic_mutexfree");
2182 MUTEX_DESTROY(MgMUTEXP(mg));
2183 COND_DESTROY(MgCONDP(mg));
2186 #endif /* USE_THREADS */
2189 Perl_whichsig(pTHX_ char *sig)
2191 register char **sigv;
2193 for (sigv = PL_sig_name+1; *sigv; sigv++)
2194 if (strEQ(sig,*sigv))
2195 return PL_sig_num[sigv - PL_sig_name];
2197 if (strEQ(sig,"CHLD"))
2201 if (strEQ(sig,"CLD"))
2210 Perl_sighandler(int sig)
2212 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2213 dTHXoa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2220 SV *sv = Nullsv, *tSv = PL_Sv;
2226 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2227 PERL_SET_THX(aTHXo); /* fake TLS, see above */
2230 if (PL_savestack_ix + 15 <= PL_savestack_max)
2232 if (PL_markstack_ptr < PL_markstack_max - 2)
2234 if (PL_retstack_ix < PL_retstack_max - 2)
2236 if (PL_scopestack_ix < PL_scopestack_max - 3)
2239 if (!PL_psig_ptr[sig])
2240 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2243 /* Max number of items pushed there is 3*n or 4. We cannot fix
2244 infinity, so we fix 4 (in fact 5): */
2246 PL_savestack_ix += 5; /* Protect save in progress. */
2247 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2250 PL_markstack_ptr++; /* Protect mark. */
2253 PL_retstack[PL_retstack_ix] = NULL;
2256 PL_scopestack_ix += 1;
2257 /* sv_2cv is too complicated, try a simpler variant first: */
2258 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2259 || SvTYPE(cv) != SVt_PVCV)
2260 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2262 if (!cv || !CvROOT(cv)) {
2263 if (ckWARN(WARN_SIGNAL))
2264 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2265 PL_sig_name[sig], (gv ? GvENAME(gv)
2272 if(PL_psig_name[sig]) {
2273 sv = SvREFCNT_inc(PL_psig_name[sig]);
2277 sv = sv_newmortal();
2278 sv_setpv(sv,PL_sig_name[sig]);
2281 PUSHSTACKi(PERLSI_SIGNAL);
2286 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2289 if (SvTRUE(ERRSV)) {
2291 #ifdef HAS_SIGPROCMASK
2292 /* Handler "died", for example to get out of a restart-able read().
2293 * Before we re-do that on its behalf re-enable the signal which was
2294 * blocked by the system when we entered.
2298 sigaddset(&set,sig);
2299 sigprocmask(SIG_UNBLOCK, &set, NULL);
2301 /* Not clear if this will work */
2302 (void)rsignal(sig, SIG_IGN);
2303 (void)rsignal(sig, &Perl_csighandler);
2305 #endif /* !PERL_MICRO */
2306 Perl_die(aTHX_ Nullch);
2310 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2316 PL_scopestack_ix -= 1;
2319 PL_op = myop; /* Apparently not needed... */
2321 PL_Sv = tSv; /* Restore global temporaries. */
2332 restore_magic(pTHXo_ void *p)
2334 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2335 SV* sv = mgs->mgs_sv;
2340 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2343 SvFLAGS(sv) |= mgs->mgs_flags;
2347 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2350 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2352 /* If we're still on top of the stack, pop us off. (That condition
2353 * will be satisfied if restore_magic was called explicitly, but *not*
2354 * if it's being called via leave_scope.)
2355 * The reason for doing this is that otherwise, things like sv_2cv()
2356 * may leave alloc gunk on the savestack, and some code
2357 * (e.g. sighandler) doesn't expect that...
2359 if (PL_savestack_ix == mgs->mgs_ss_ix)
2361 I32 popval = SSPOPINT;
2362 assert(popval == SAVEt_DESTRUCTOR_X);
2363 PL_savestack_ix -= 2;
2365 assert(popval == SAVEt_ALLOC);
2367 PL_savestack_ix -= popval;
2373 unwind_handler_stack(pTHXo_ void *p)
2375 U32 flags = *(U32*)p;
2378 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2379 /* cxstack_ix-- Not needed, die already unwound it. */
2381 SvREFCNT_dec(sig_sv);