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(pTHX_ void *p);
29 static void unwind_handler_stack(pTHX_ 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)
97 MAGIC *newmg, *head, *cur, *mg;
98 I32 mgs_ix = SSNEW(sizeof(MGS));
100 save_magic(mgs_ix, sv);
102 /* We must call svt_get(sv, mg) for each valid entry in the linked
103 list of magic. svt_get() may delete the current entry, add new
104 magic to the head of the list, or upgrade the SV. AMS 20010810 */
106 newmg = cur = head = mg = SvMAGIC(sv);
108 MGVTBL *vtbl = mg->mg_virtual;
110 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
111 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
112 /* Don't restore the flags for this entry if it was deleted. */
113 if (mg->mg_flags & MGf_GSKIP)
114 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
117 mg = mg->mg_moremagic;
120 /* Have we finished with the new entries we saw? Start again
121 where we left off (unless there are more new entries). */
129 /* Were any new entries added? */
130 if (!new && (newmg = SvMAGIC(sv)) != head) {
137 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
144 Do magic after a value is assigned to the SV. See C<sv_magic>.
150 Perl_mg_set(pTHX_ SV *sv)
156 mgs_ix = SSNEW(sizeof(MGS));
157 save_magic(mgs_ix, sv);
159 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
160 MGVTBL* vtbl = mg->mg_virtual;
161 nextmg = mg->mg_moremagic; /* it may delete itself */
162 if (mg->mg_flags & MGf_GSKIP) {
163 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
164 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
166 if (vtbl && vtbl->svt_set)
167 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
170 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
175 =for apidoc mg_length
177 Report on the SV's length. See C<sv_magic>.
183 Perl_mg_length(pTHX_ SV *sv)
188 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
189 MGVTBL* vtbl = mg->mg_virtual;
190 if (vtbl && vtbl->svt_len) {
193 mgs_ix = SSNEW(sizeof(MGS));
194 save_magic(mgs_ix, sv);
195 /* omit MGf_GSKIP -- not changed here */
196 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
197 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
204 U8 *s = (U8*)SvPV(sv, len);
205 len = Perl_utf8_length(aTHX_ s, s + len);
213 Perl_mg_size(pTHX_ SV *sv)
218 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
219 MGVTBL* vtbl = mg->mg_virtual;
220 if (vtbl && vtbl->svt_len) {
223 mgs_ix = SSNEW(sizeof(MGS));
224 save_magic(mgs_ix, sv);
225 /* omit MGf_GSKIP -- not changed here */
226 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
227 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
234 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
239 Perl_croak(aTHX_ "Size magic not implemented");
248 Clear something magical that the SV represents. See C<sv_magic>.
254 Perl_mg_clear(pTHX_ SV *sv)
259 mgs_ix = SSNEW(sizeof(MGS));
260 save_magic(mgs_ix, sv);
262 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
263 MGVTBL* vtbl = mg->mg_virtual;
264 /* omit GSKIP -- never set here */
266 if (vtbl && vtbl->svt_clear)
267 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
270 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
277 Finds the magic pointer for type matching the SV. See C<sv_magic>.
283 Perl_mg_find(pTHX_ SV *sv, int type)
288 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
289 if (mg->mg_type == type)
298 Copies the magic from one SV to another. See C<sv_magic>.
304 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
308 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
309 if (isUPPER(mg->mg_type)) {
311 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
312 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
314 toLOWER(mg->mg_type), key, klen);
324 Free any magic storage used by the SV. See C<sv_magic>.
330 Perl_mg_free(pTHX_ SV *sv)
334 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
335 MGVTBL* vtbl = mg->mg_virtual;
336 moremagic = mg->mg_moremagic;
337 if (vtbl && vtbl->svt_free)
338 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
339 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
341 Safefree(mg->mg_ptr);
342 else if (mg->mg_len == HEf_SVKEY)
343 SvREFCNT_dec((SV*)mg->mg_ptr);
345 if (mg->mg_flags & MGf_REFCOUNTED)
346 SvREFCNT_dec(mg->mg_obj);
354 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
359 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
363 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
364 if (mg->mg_obj) /* @+ */
367 return rx->lastparen;
374 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
382 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
386 if (paren <= rx->nparens &&
387 (s = rx->startp[paren]) != -1 &&
388 (t = rx->endp[paren]) != -1)
390 if (mg->mg_obj) /* @+ */
395 if (i > 0 && PL_reg_match_utf8) {
396 char *b = rx->subbeg;
398 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
408 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
410 Perl_croak(aTHX_ PL_no_modify);
416 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
423 switch (*mg->mg_ptr) {
424 case '1': case '2': case '3': case '4':
425 case '5': case '6': case '7': case '8': case '9': case '&':
426 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
428 paren = atoi(mg->mg_ptr); /* $& is in [0] */
430 if (paren <= rx->nparens &&
431 (s1 = rx->startp[paren]) != -1 &&
432 (t1 = rx->endp[paren]) != -1)
436 if (i > 0 && PL_reg_match_utf8) {
437 char *s = rx->subbeg + s1;
438 char *send = rx->subbeg + t1;
441 if (is_utf8_string((U8*)s, i))
442 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
445 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
451 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
452 paren = rx->lastparen;
457 case '\016': /* ^N */
458 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
459 paren = rx->lastcloseparen;
465 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
466 if (rx->startp[0] != -1) {
477 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
478 if (rx->endp[0] != -1) {
479 i = rx->sublen - rx->endp[0];
490 if (!SvPOK(sv) && SvNIOK(sv)) {
500 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
507 switch (*mg->mg_ptr) {
508 case '\001': /* ^A */
509 sv_setsv(sv, PL_bodytarget);
511 case '\003': /* ^C */
512 sv_setiv(sv, (IV)PL_minus_c);
515 case '\004': /* ^D */
516 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
517 #if defined(YYDEBUG) && defined(DEBUGGING)
518 PL_yydebug = DEBUG_p_TEST;
521 case '\005': /* ^E */
522 #ifdef MACOS_TRADITIONAL
526 sv_setnv(sv,(double)gMacPerl_OSErr);
527 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
532 # include <descrip.h>
533 # include <starlet.h>
535 $DESCRIPTOR(msgdsc,msg);
536 sv_setnv(sv,(NV) vaxc$errno);
537 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
538 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
544 if (!(_emx_env & 0x200)) { /* Under DOS */
545 sv_setnv(sv, (NV)errno);
546 sv_setpv(sv, errno ? Strerror(errno) : "");
548 if (errno != errno_isOS2) {
549 int tmp = _syserrno();
550 if (tmp) /* 2nd call to _syserrno() makes it 0 */
553 sv_setnv(sv, (NV)Perl_rc);
554 sv_setpv(sv, os2error(Perl_rc));
559 DWORD dwErr = GetLastError();
560 sv_setnv(sv, (NV)dwErr);
563 PerlProc_GetOSError(sv, dwErr);
570 sv_setnv(sv, (NV)errno);
571 sv_setpv(sv, errno ? Strerror(errno) : "");
576 SvNOK_on(sv); /* what a wonderful hack! */
578 case '\006': /* ^F */
579 sv_setiv(sv, (IV)PL_maxsysfd);
581 case '\010': /* ^H */
582 sv_setiv(sv, (IV)PL_hints);
584 case '\011': /* ^I */ /* NOT \t in EBCDIC */
586 sv_setpv(sv, PL_inplace);
588 sv_setsv(sv, &PL_sv_undef);
590 case '\017': /* ^O & ^OPEN */
591 if (*(mg->mg_ptr+1) == '\0')
592 sv_setpv(sv, PL_osname);
593 else if (strEQ(mg->mg_ptr, "\017PEN")) {
594 if (!PL_compiling.cop_io)
595 sv_setsv(sv, &PL_sv_undef);
597 sv_setsv(sv, PL_compiling.cop_io);
601 case '\020': /* ^P */
602 sv_setiv(sv, (IV)PL_perldb);
604 case '\023': /* ^S */
606 if (PL_lex_state != LEX_NOTPARSING)
609 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
614 case '\024': /* ^T */
615 if (*(mg->mg_ptr+1) == '\0') {
617 sv_setnv(sv, PL_basetime);
619 sv_setiv(sv, (IV)PL_basetime);
622 else if (strEQ(mg->mg_ptr, "\024AINT"))
623 sv_setiv(sv, PL_tainting);
625 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
626 if (*(mg->mg_ptr+1) == '\0')
627 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
628 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
629 if (PL_compiling.cop_warnings == pWARN_NONE ||
630 PL_compiling.cop_warnings == pWARN_STD)
632 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
634 else if (PL_compiling.cop_warnings == pWARN_ALL) {
635 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
638 sv_setsv(sv, PL_compiling.cop_warnings);
642 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
643 sv_setiv(sv, (IV)PL_widesyscalls);
645 case '1': case '2': case '3': case '4':
646 case '5': case '6': case '7': case '8': case '9': case '&':
647 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
651 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
652 * XXX Does the new way break anything?
654 paren = atoi(mg->mg_ptr); /* $& is in [0] */
656 if (paren <= rx->nparens &&
657 (s1 = rx->startp[paren]) != -1 &&
658 (t1 = rx->endp[paren]) != -1)
667 bool was_tainted = FALSE;
669 was_tainted = PL_tainted;
673 if (PL_reg_match_utf8 && is_utf8_string((U8*)s, i))
678 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
683 sv_setsv(sv,&PL_sv_undef);
686 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
687 paren = rx->lastparen;
691 sv_setsv(sv,&PL_sv_undef);
693 case '\016': /* ^N */
694 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
695 paren = rx->lastcloseparen;
699 sv_setsv(sv,&PL_sv_undef);
702 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
703 if ((s = rx->subbeg) && rx->startp[0] != -1) {
708 sv_setsv(sv,&PL_sv_undef);
711 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
712 if (rx->subbeg && rx->endp[0] != -1) {
713 s = rx->subbeg + rx->endp[0];
714 i = rx->sublen - rx->endp[0];
718 sv_setsv(sv,&PL_sv_undef);
722 if (GvIO(PL_last_in_gv)) {
723 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
729 sv_setiv(sv, (IV)STATUS_CURRENT);
730 #ifdef COMPLEX_STATUS
731 LvTARGOFF(sv) = PL_statusvalue;
732 LvTARGLEN(sv) = PL_statusvalue_vms;
737 s = IoTOP_NAME(GvIOp(PL_defoutgv));
741 sv_setpv(sv,GvENAME(PL_defoutgv));
746 s = IoFMT_NAME(GvIOp(PL_defoutgv));
748 s = GvENAME(PL_defoutgv);
753 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
756 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
759 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
767 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
770 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
777 sv_setpv(sv,PL_ofmt);
781 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
782 sv_setpv(sv, errno ? Strerror(errno) : "");
785 int saveerrno = errno;
786 sv_setnv(sv, (NV)errno);
788 if (errno == errno_isOS2 || errno == errno_isOS2_set)
789 sv_setpv(sv, os2error(Perl_rc));
792 sv_setpv(sv, errno ? Strerror(errno) : "");
796 SvNOK_on(sv); /* what a wonderful hack! */
799 sv_setiv(sv, (IV)PL_uid);
802 sv_setiv(sv, (IV)PL_euid);
805 sv_setiv(sv, (IV)PL_gid);
807 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
811 sv_setiv(sv, (IV)PL_egid);
813 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
818 Groups_t gary[NGROUPS];
819 i = getgroups(NGROUPS,gary);
821 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
824 (void)SvIOK_on(sv); /* what a wonderful hack! */
828 #ifndef MACOS_TRADITIONAL
832 #ifdef USE_5005THREADS
834 sv_setsv(sv, thr->errsv);
836 #endif /* USE_5005THREADS */
842 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
844 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
846 if (uf && uf->uf_val)
847 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
852 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
863 #ifdef DYNAMIC_ENV_FETCH
864 /* We just undefd an environment var. Is a replacement */
865 /* waiting in the wings? */
868 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
869 s = SvPV(*valp, len);
873 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
874 /* And you'll never guess what the dog had */
875 /* in its mouth... */
877 MgTAINTEDDIR_off(mg);
879 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
880 char pathbuf[256], eltbuf[256], *cp, *elt = s;
884 do { /* DCL$PATH may be a search list */
885 while (1) { /* as may dev portion of any element */
886 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
887 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
888 cando_by_name(S_IWUSR,0,elt) ) {
893 if ((cp = strchr(elt, ':')) != Nullch)
895 if (my_trnlnm(elt, eltbuf, j++))
901 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
904 if (s && klen == 4 && strEQ(ptr,"PATH")) {
905 char *strend = s + len;
910 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
913 if (i >= sizeof tmpbuf /* too long -- assume the worst */
915 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
922 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
928 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
931 my_setenv(MgPV(mg,n_a),Nullch);
936 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
939 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
944 magic_clear_all_env(sv,mg);
945 hv_iterinit((HV*)sv);
946 while ((entry = hv_iternext((HV*)sv))) {
948 my_setenv(hv_iterkey(entry, &keylen),
949 SvPV(hv_iterval((HV*)sv, entry), n_a));
957 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
959 #if defined(VMS) || defined(EPOC)
960 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
962 # ifdef PERL_IMPLICIT_SYS
966 char *envv = GetEnvironmentStrings();
970 char *end = strchr(cur,'=');
971 if (end && end != cur) {
973 my_setenv(cur,Nullch);
975 cur = end + strlen(end+1)+2;
977 else if ((len = strlen(cur)))
980 FreeEnvironmentStrings(envv);
982 #ifdef USE_ENVIRON_ARRAY
983 # ifndef PERL_USE_SAFE_PUTENV
986 if (environ == PL_origenviron)
987 environ = (char**)safesysmalloc(sizeof(char*));
989 for (i = 0; environ[i]; i++)
990 safesysfree(environ[i]);
991 # endif /* PERL_USE_SAFE_PUTENV */
995 #endif /* USE_ENVIRON_ARRAY */
997 # endif /* PERL_IMPLICIT_SYS */
1004 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1008 /* Are we fetching a signal entry? */
1009 i = whichsig(MgPV(mg,n_a));
1012 sv_setsv(sv,PL_psig_ptr[i]);
1014 Sighandler_t sigstate = rsignal_state(i);
1016 /* cache state so we don't fetch it again */
1017 if(sigstate == SIG_IGN)
1018 sv_setpv(sv,"IGNORE");
1020 sv_setsv(sv,&PL_sv_undef);
1021 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1028 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1032 /* Are we clearing a signal entry? */
1033 i = whichsig(MgPV(mg,n_a));
1035 if(PL_psig_ptr[i]) {
1036 SvREFCNT_dec(PL_psig_ptr[i]);
1039 if(PL_psig_name[i]) {
1040 SvREFCNT_dec(PL_psig_name[i]);
1048 Perl_raise_signal(pTHX_ int sig)
1050 /* Set a flag to say this signal is pending */
1051 PL_psig_pend[sig]++;
1052 /* And one to say _a_ signal is pending */
1057 Perl_csighandler(int sig)
1059 #ifdef PERL_OLD_SIGNALS
1060 /* Call the perl level handler now with risk we may be in malloc() etc. */
1061 (*PL_sighandlerp)(sig);
1064 Perl_raise_signal(aTHX_ sig);
1069 Perl_despatch_signals(pTHX)
1073 for (sig = 1; sig < SIG_SIZE; sig++) {
1074 if (PL_psig_pend[sig]) {
1075 PL_psig_pend[sig] = 0;
1076 (*PL_sighandlerp)(sig);
1082 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1091 if (strEQ(s,"__DIE__"))
1093 else if (strEQ(s,"__WARN__"))
1096 Perl_croak(aTHX_ "No such hook: %s", s);
1104 i = whichsig(s); /* ...no, a brick */
1106 if (ckWARN(WARN_SIGNAL))
1107 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1110 SvREFCNT_dec(PL_psig_name[i]);
1111 SvREFCNT_dec(PL_psig_ptr[i]);
1112 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1113 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1114 PL_psig_name[i] = newSVpvn(s, len);
1115 SvREADONLY_on(PL_psig_name[i]);
1117 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1119 (void)rsignal(i, &Perl_csighandler);
1121 *svp = SvREFCNT_inc(sv);
1124 s = SvPV_force(sv,len);
1125 if (strEQ(s,"IGNORE")) {
1127 (void)rsignal(i, SIG_IGN);
1131 else if (strEQ(s,"DEFAULT") || !*s) {
1133 (void)rsignal(i, SIG_DFL);
1139 * We should warn if HINT_STRICT_REFS, but without
1140 * access to a known hint bit in a known OP, we can't
1141 * tell whether HINT_STRICT_REFS is in force or not.
1143 if (!strchr(s,':') && !strchr(s,'\''))
1144 sv_insert(sv, 0, 0, "main::", 6);
1146 (void)rsignal(i, &Perl_csighandler);
1148 *svp = SvREFCNT_inc(sv);
1152 #endif /* !PERL_MICRO */
1155 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1157 PL_sub_generation++;
1162 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1164 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1165 PL_amagic_generation++;
1171 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1173 HV *hv = (HV*)LvTARG(sv);
1177 (void) hv_iterinit(hv);
1178 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1181 while (hv_iternext(hv))
1186 sv_setiv(sv, (IV)i);
1191 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1194 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1199 /* caller is responsible for stack switching/cleanup */
1201 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1207 PUSHs(SvTIED_obj(sv, mg));
1210 if (mg->mg_len >= 0)
1211 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1212 else if (mg->mg_len == HEf_SVKEY)
1213 PUSHs((SV*)mg->mg_ptr);
1215 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1216 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1224 return call_method(meth, flags);
1228 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1234 PUSHSTACKi(PERLSI_MAGIC);
1236 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1237 sv_setsv(sv, *PL_stack_sp--);
1247 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1249 magic_methpack(sv,mg,"FETCH");
1251 mg->mg_flags |= MGf_GSKIP;
1256 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1260 PUSHSTACKi(PERLSI_MAGIC);
1261 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1268 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1270 return magic_methpack(sv,mg,"DELETE");
1275 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1282 PUSHSTACKi(PERLSI_MAGIC);
1283 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1284 sv = *PL_stack_sp--;
1285 retval = (U32) SvIV(sv)-1;
1294 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1299 PUSHSTACKi(PERLSI_MAGIC);
1301 XPUSHs(SvTIED_obj(sv, mg));
1303 call_method("CLEAR", G_SCALAR|G_DISCARD);
1310 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1313 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1317 PUSHSTACKi(PERLSI_MAGIC);
1320 PUSHs(SvTIED_obj(sv, mg));
1325 if (call_method(meth, G_SCALAR))
1326 sv_setsv(key, *PL_stack_sp--);
1335 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1337 return magic_methpack(sv,mg,"EXISTS");
1341 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1351 svp = av_fetch(GvAV(gv),
1352 atoi(MgPV(mg,n_a)), FALSE);
1353 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1359 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1361 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1366 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1368 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1373 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1375 SV* lsv = LvTARG(sv);
1377 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1378 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1379 if (mg && mg->mg_len >= 0) {
1382 sv_pos_b2u(lsv, &i);
1383 sv_setiv(sv, i + PL_curcop->cop_arybase);
1392 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1394 SV* lsv = LvTARG(sv);
1401 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1402 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1406 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1407 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1409 else if (!SvOK(sv)) {
1413 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1415 pos = SvIV(sv) - PL_curcop->cop_arybase;
1418 ulen = sv_len_utf8(lsv);
1433 sv_pos_u2b(lsv, &p, 0);
1438 mg->mg_flags &= ~MGf_MINMATCH;
1444 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1446 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1448 gv_efullname3(sv,((GV*)sv), "*");
1452 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1457 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1466 if (*s == '*' && s[1])
1468 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1473 GvGP(sv) = gp_ref(GvGP(gv));
1478 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1481 SV *lsv = LvTARG(sv);
1482 char *tmps = SvPV(lsv,len);
1483 I32 offs = LvTARGOFF(sv);
1484 I32 rem = LvTARGLEN(sv);
1487 sv_pos_u2b(lsv, &offs, &rem);
1490 if (rem + offs > len)
1492 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1499 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1502 char *tmps = SvPV(sv, len);
1503 SV *lsv = LvTARG(sv);
1504 I32 lvoff = LvTARGOFF(sv);
1505 I32 lvlen = LvTARGLEN(sv);
1508 sv_utf8_upgrade(lsv);
1509 sv_pos_u2b(lsv, &lvoff, &lvlen);
1510 sv_insert(lsv, lvoff, lvlen, tmps, len);
1513 else if (lsv && SvUTF8(lsv)) {
1514 sv_pos_u2b(lsv, &lvoff, &lvlen);
1515 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1516 sv_insert(lsv, lvoff, lvlen, tmps, len);
1520 sv_insert(lsv, lvoff, lvlen, tmps, len);
1526 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1528 TAINT_IF((mg->mg_len & 1) ||
1529 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1534 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1536 if (PL_localizing) {
1537 if (PL_localizing == 1)
1542 else if (PL_tainted)
1550 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1552 SV *lsv = LvTARG(sv);
1559 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1564 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1566 do_vecset(sv); /* XXX slurp this routine */
1571 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1574 if (LvTARGLEN(sv)) {
1576 SV *ahv = LvTARG(sv);
1577 if (SvTYPE(ahv) == SVt_PVHV) {
1578 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1583 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1589 AV* av = (AV*)LvTARG(sv);
1590 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1591 targ = AvARRAY(av)[LvTARGOFF(sv)];
1593 if (targ && targ != &PL_sv_undef) {
1594 /* somebody else defined it for us */
1595 SvREFCNT_dec(LvTARG(sv));
1596 LvTARG(sv) = SvREFCNT_inc(targ);
1598 SvREFCNT_dec(mg->mg_obj);
1599 mg->mg_obj = Nullsv;
1600 mg->mg_flags &= ~MGf_REFCOUNTED;
1605 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1610 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1615 sv_setsv(LvTARG(sv), sv);
1616 SvSETMAGIC(LvTARG(sv));
1622 Perl_vivify_defelem(pTHX_ SV *sv)
1627 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1630 SV *ahv = LvTARG(sv);
1632 if (SvTYPE(ahv) == SVt_PVHV) {
1633 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1638 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1642 if (!value || value == &PL_sv_undef)
1643 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1646 AV* av = (AV*)LvTARG(sv);
1647 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1648 LvTARG(sv) = Nullsv; /* array can't be extended */
1650 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1651 if (!svp || (value = *svp) == &PL_sv_undef)
1652 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1655 (void)SvREFCNT_inc(value);
1656 SvREFCNT_dec(LvTARG(sv));
1659 SvREFCNT_dec(mg->mg_obj);
1660 mg->mg_obj = Nullsv;
1661 mg->mg_flags &= ~MGf_REFCOUNTED;
1665 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1667 AV *av = (AV*)mg->mg_obj;
1668 SV **svp = AvARRAY(av);
1669 I32 i = AvFILLp(av);
1671 if (svp[i] && svp[i] != &PL_sv_undef) {
1672 if (!SvWEAKREF(svp[i]))
1673 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1674 /* XXX Should we check that it hasn't changed? */
1676 (void)SvOK_off(svp[i]);
1677 SvWEAKREF_off(svp[i]);
1678 svp[i] = &PL_sv_undef;
1686 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1694 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1696 sv_unmagic(sv, PERL_MAGIC_bm);
1702 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1704 sv_unmagic(sv, PERL_MAGIC_fm);
1710 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1712 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1714 if (uf && uf->uf_set)
1715 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1720 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1722 regexp *re = (regexp *)mg->mg_obj;
1727 #ifdef USE_LOCALE_COLLATE
1729 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1732 * RenE<eacute> Descartes said "I think not."
1733 * and vanished with a faint plop.
1736 Safefree(mg->mg_ptr);
1742 #endif /* USE_LOCALE_COLLATE */
1745 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1750 switch (*mg->mg_ptr) {
1751 case '\001': /* ^A */
1752 sv_setsv(PL_bodytarget, sv);
1754 case '\003': /* ^C */
1755 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1758 case '\004': /* ^D */
1759 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1760 DEBUG_x(dump_all());
1762 case '\005': /* ^E */
1763 #ifdef MACOS_TRADITIONAL
1764 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1767 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1770 SetLastError( SvIV(sv) );
1773 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1775 /* will anyone ever use this? */
1776 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1782 case '\006': /* ^F */
1783 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1785 case '\010': /* ^H */
1786 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1788 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1790 Safefree(PL_inplace);
1792 PL_inplace = savepv(SvPV(sv,len));
1794 PL_inplace = Nullch;
1796 case '\017': /* ^O */
1797 if (*(mg->mg_ptr+1) == '\0') {
1799 Safefree(PL_osname);
1801 PL_osname = savepv(SvPV(sv,len));
1805 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1806 if (!PL_compiling.cop_io)
1807 PL_compiling.cop_io = newSVsv(sv);
1809 sv_setsv(PL_compiling.cop_io,sv);
1812 case '\020': /* ^P */
1813 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1814 if (PL_perldb && !PL_DBsingle)
1817 case '\024': /* ^T */
1819 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1821 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1824 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1825 if (*(mg->mg_ptr+1) == '\0') {
1826 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1827 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1828 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1829 | (i ? G_WARN_ON : G_WARN_OFF) ;
1832 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1833 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1834 if (!SvPOK(sv) && PL_localizing) {
1835 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1836 PL_compiling.cop_warnings = pWARN_NONE;
1841 int accumulate = 0 ;
1842 int any_fatals = 0 ;
1843 char * ptr = (char*)SvPV(sv, len) ;
1844 for (i = 0 ; i < len ; ++i) {
1845 accumulate |= ptr[i] ;
1846 any_fatals |= (ptr[i] & 0xAA) ;
1849 PL_compiling.cop_warnings = pWARN_NONE;
1850 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1851 PL_compiling.cop_warnings = pWARN_ALL;
1852 PL_dowarn |= G_WARN_ONCE ;
1855 if (specialWARN(PL_compiling.cop_warnings))
1856 PL_compiling.cop_warnings = newSVsv(sv) ;
1858 sv_setsv(PL_compiling.cop_warnings, sv);
1859 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1860 PL_dowarn |= G_WARN_ONCE ;
1866 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1867 PL_widesyscalls = SvTRUE(sv);
1870 if (PL_localizing) {
1871 if (PL_localizing == 1)
1872 SAVESPTR(PL_last_in_gv);
1874 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1875 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1878 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1879 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1880 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1883 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1884 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1885 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1888 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1891 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1892 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1893 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1896 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1900 IO *io = GvIOp(PL_defoutgv);
1903 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1904 IoFLAGS(io) &= ~IOf_FLUSH;
1906 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1907 PerlIO *ofp = IoOFP(io);
1909 (void)PerlIO_flush(ofp);
1910 IoFLAGS(io) |= IOf_FLUSH;
1916 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1917 PL_multiline = (i != 0);
1920 SvREFCNT_dec(PL_rs);
1921 PL_rs = newSVsv(sv);
1925 SvREFCNT_dec(PL_ors_sv);
1926 if (SvOK(sv) || SvGMAGICAL(sv)) {
1927 PL_ors_sv = newSVsv(sv);
1935 SvREFCNT_dec(PL_ofs_sv);
1936 if (SvOK(sv) || SvGMAGICAL(sv)) {
1937 PL_ofs_sv = newSVsv(sv);
1946 PL_ofmt = savepv(SvPV(sv,len));
1949 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1952 #ifdef COMPLEX_STATUS
1953 if (PL_localizing == 2) {
1954 PL_statusvalue = LvTARGOFF(sv);
1955 PL_statusvalue_vms = LvTARGLEN(sv);
1959 #ifdef VMSISH_STATUS
1961 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1964 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1967 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1968 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1971 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1972 if (PL_delaymagic) {
1973 PL_delaymagic |= DM_RUID;
1974 break; /* don't do magic till later */
1977 (void)setruid((Uid_t)PL_uid);
1980 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1982 #ifdef HAS_SETRESUID
1983 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1985 if (PL_uid == PL_euid) /* special case $< = $> */
1986 (void)PerlProc_setuid(PL_uid);
1988 PL_uid = PerlProc_getuid();
1989 Perl_croak(aTHX_ "setruid() not implemented");
1994 PL_uid = PerlProc_getuid();
1995 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1998 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1999 if (PL_delaymagic) {
2000 PL_delaymagic |= DM_EUID;
2001 break; /* don't do magic till later */
2004 (void)seteuid((Uid_t)PL_euid);
2007 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2009 #ifdef HAS_SETRESUID
2010 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2012 if (PL_euid == PL_uid) /* special case $> = $< */
2013 PerlProc_setuid(PL_euid);
2015 PL_euid = PerlProc_geteuid();
2016 Perl_croak(aTHX_ "seteuid() not implemented");
2021 PL_euid = PerlProc_geteuid();
2022 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2025 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2026 if (PL_delaymagic) {
2027 PL_delaymagic |= DM_RGID;
2028 break; /* don't do magic till later */
2031 (void)setrgid((Gid_t)PL_gid);
2034 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2036 #ifdef HAS_SETRESGID
2037 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2039 if (PL_gid == PL_egid) /* special case $( = $) */
2040 (void)PerlProc_setgid(PL_gid);
2042 PL_gid = PerlProc_getgid();
2043 Perl_croak(aTHX_ "setrgid() not implemented");
2048 PL_gid = PerlProc_getgid();
2049 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2052 #ifdef HAS_SETGROUPS
2054 char *p = SvPV(sv, len);
2055 Groups_t gary[NGROUPS];
2060 for (i = 0; i < NGROUPS; ++i) {
2061 while (*p && !isSPACE(*p))
2070 (void)setgroups(i, gary);
2072 #else /* HAS_SETGROUPS */
2073 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2074 #endif /* HAS_SETGROUPS */
2075 if (PL_delaymagic) {
2076 PL_delaymagic |= DM_EGID;
2077 break; /* don't do magic till later */
2080 (void)setegid((Gid_t)PL_egid);
2083 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2085 #ifdef HAS_SETRESGID
2086 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2088 if (PL_egid == PL_gid) /* special case $) = $( */
2089 (void)PerlProc_setgid(PL_egid);
2091 PL_egid = PerlProc_getegid();
2092 Perl_croak(aTHX_ "setegid() not implemented");
2097 PL_egid = PerlProc_getegid();
2098 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2101 PL_chopset = SvPV_force(sv,len);
2103 #ifndef MACOS_TRADITIONAL
2105 #ifdef HAS_SETPROCTITLE
2106 /* The BSDs don't show the argv[] in ps(1) output, they
2107 * show a string from the process struct and provide
2108 * the setproctitle() routine to manipulate that. */
2111 # if __FreeBSD_version > 410001
2112 /* The leading "-" removes the "perl: " prefix,
2113 * but not the "(perl) suffix from the ps(1)
2114 * output, because that's what ps(1) shows if the
2115 * argv[] is modified. */
2116 setproctitle("-%s", s);
2117 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2118 /* This doesn't really work if you assume that
2119 * $0 = 'foobar'; will wipe out 'perl' from the $0
2120 * because in ps(1) output the result will be like
2121 * sprintf("perl: %s (perl)", s)
2122 * I guess this is a security feature:
2123 * one (a user process) cannot get rid of the original name.
2125 setproctitle("%s", s);
2132 /* See if all the arguments are contiguous in memory */
2133 for (i = 1; i < PL_origargc; i++) {
2134 if (PL_origargv[i] == s + 1
2136 || PL_origargv[i] == s + 2
2141 s += strlen(s); /* this one is ok too */
2146 /* can grab env area too? */
2147 if (PL_origenviron && (PL_origenviron[0] == s + 1)) {
2148 my_setenv("NoNe SuCh", Nullch);
2149 /* force copy of environment */
2150 for (i = 0; PL_origenviron[i]; i++)
2151 if (PL_origenviron[i] == s + 1) {
2158 PL_origalen = s - PL_origargv[0];
2160 s = SvPV_force(sv,len);
2162 if (i >= PL_origalen) {
2164 /* don't allow system to limit $0 seen by script */
2165 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2166 Copy(s, PL_origargv[0], i, char);
2167 s = PL_origargv[0]+i;
2171 Copy(s, PL_origargv[0], i, char);
2172 s = PL_origargv[0]+i;
2174 while (++i < PL_origalen)
2176 s = PL_origargv[0]+i;
2177 for (i = 1; i < PL_origargc; i++)
2178 PL_origargv[i] = Nullch;
2182 #ifdef USE_5005THREADS
2184 sv_setsv(thr->errsv, sv);
2186 #endif /* USE_5005THREADS */
2191 #ifdef USE_5005THREADS
2193 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2195 DEBUG_S(PerlIO_printf(Perl_debug_log,
2196 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2197 PTR2UV(thr), PTR2UV(sv)));
2199 Perl_croak(aTHX_ "panic: magic_mutexfree");
2200 MUTEX_DESTROY(MgMUTEXP(mg));
2201 COND_DESTROY(MgCONDP(mg));
2204 #endif /* USE_5005THREADS */
2207 Perl_whichsig(pTHX_ char *sig)
2209 register char **sigv;
2211 for (sigv = PL_sig_name+1; *sigv; sigv++)
2212 if (strEQ(sig,*sigv))
2213 return PL_sig_num[sigv - PL_sig_name];
2215 if (strEQ(sig,"CHLD"))
2219 if (strEQ(sig,"CLD"))
2228 Perl_sighandler(int sig)
2230 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2231 dTHXa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2238 SV *sv = Nullsv, *tSv = PL_Sv;
2244 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2245 PERL_SET_THX(aTHX); /* fake TLS, see above */
2248 if (PL_savestack_ix + 15 <= PL_savestack_max)
2250 if (PL_markstack_ptr < PL_markstack_max - 2)
2252 if (PL_retstack_ix < PL_retstack_max - 2)
2254 if (PL_scopestack_ix < PL_scopestack_max - 3)
2257 if (!PL_psig_ptr[sig])
2258 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2261 /* Max number of items pushed there is 3*n or 4. We cannot fix
2262 infinity, so we fix 4 (in fact 5): */
2264 PL_savestack_ix += 5; /* Protect save in progress. */
2265 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2268 PL_markstack_ptr++; /* Protect mark. */
2271 PL_retstack[PL_retstack_ix] = NULL;
2274 PL_scopestack_ix += 1;
2275 /* sv_2cv is too complicated, try a simpler variant first: */
2276 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2277 || SvTYPE(cv) != SVt_PVCV)
2278 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2280 if (!cv || !CvROOT(cv)) {
2281 if (ckWARN(WARN_SIGNAL))
2282 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2283 PL_sig_name[sig], (gv ? GvENAME(gv)
2290 if(PL_psig_name[sig]) {
2291 sv = SvREFCNT_inc(PL_psig_name[sig]);
2295 sv = sv_newmortal();
2296 sv_setpv(sv,PL_sig_name[sig]);
2299 PUSHSTACKi(PERLSI_SIGNAL);
2304 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2307 if (SvTRUE(ERRSV)) {
2309 #ifdef HAS_SIGPROCMASK
2310 /* Handler "died", for example to get out of a restart-able read().
2311 * Before we re-do that on its behalf re-enable the signal which was
2312 * blocked by the system when we entered.
2316 sigaddset(&set,sig);
2317 sigprocmask(SIG_UNBLOCK, &set, NULL);
2319 /* Not clear if this will work */
2320 (void)rsignal(sig, SIG_IGN);
2321 (void)rsignal(sig, &Perl_csighandler);
2323 #endif /* !PERL_MICRO */
2324 Perl_die(aTHX_ Nullformat);
2328 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2334 PL_scopestack_ix -= 1;
2337 PL_op = myop; /* Apparently not needed... */
2339 PL_Sv = tSv; /* Restore global temporaries. */
2346 restore_magic(pTHX_ void *p)
2348 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2349 SV* sv = mgs->mgs_sv;
2354 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2357 SvFLAGS(sv) |= mgs->mgs_flags;
2361 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2364 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2366 /* If we're still on top of the stack, pop us off. (That condition
2367 * will be satisfied if restore_magic was called explicitly, but *not*
2368 * if it's being called via leave_scope.)
2369 * The reason for doing this is that otherwise, things like sv_2cv()
2370 * may leave alloc gunk on the savestack, and some code
2371 * (e.g. sighandler) doesn't expect that...
2373 if (PL_savestack_ix == mgs->mgs_ss_ix)
2375 I32 popval = SSPOPINT;
2376 assert(popval == SAVEt_DESTRUCTOR_X);
2377 PL_savestack_ix -= 2;
2379 assert(popval == SAVEt_ALLOC);
2381 PL_savestack_ix -= popval;
2387 unwind_handler_stack(pTHX_ void *p)
2389 U32 flags = *(U32*)p;
2392 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2393 /* cxstack_ix-- Not needed, die already unwound it. */
2395 SvREFCNT_dec(sig_sv);