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 if (*(mg->mg_ptr+1) == '\0') {
523 #ifdef MACOS_TRADITIONAL
527 sv_setnv(sv,(double)gMacPerl_OSErr);
528 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
533 # include <descrip.h>
534 # include <starlet.h>
536 $DESCRIPTOR(msgdsc,msg);
537 sv_setnv(sv,(NV) vaxc$errno);
538 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
539 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
545 if (!(_emx_env & 0x200)) { /* Under DOS */
546 sv_setnv(sv, (NV)errno);
547 sv_setpv(sv, errno ? Strerror(errno) : "");
549 if (errno != errno_isOS2) {
550 int tmp = _syserrno();
551 if (tmp) /* 2nd call to _syserrno() makes it 0 */
554 sv_setnv(sv, (NV)Perl_rc);
555 sv_setpv(sv, os2error(Perl_rc));
560 DWORD dwErr = GetLastError();
561 sv_setnv(sv, (NV)dwErr);
564 PerlProc_GetOSError(sv, dwErr);
571 sv_setnv(sv, (NV)errno);
572 sv_setpv(sv, errno ? Strerror(errno) : "");
577 SvNOK_on(sv); /* what a wonderful hack! */
579 else if (strEQ(mg->mg_ptr+1, "NCODING"))
580 sv_setsv(sv, PL_encoding);
582 case '\006': /* ^F */
583 sv_setiv(sv, (IV)PL_maxsysfd);
585 case '\010': /* ^H */
586 sv_setiv(sv, (IV)PL_hints);
588 case '\011': /* ^I */ /* NOT \t in EBCDIC */
590 sv_setpv(sv, PL_inplace);
592 sv_setsv(sv, &PL_sv_undef);
594 case '\017': /* ^O & ^OPEN */
595 if (*(mg->mg_ptr+1) == '\0')
596 sv_setpv(sv, PL_osname);
597 else if (strEQ(mg->mg_ptr, "\017PEN")) {
598 if (!PL_compiling.cop_io)
599 sv_setsv(sv, &PL_sv_undef);
601 sv_setsv(sv, PL_compiling.cop_io);
605 case '\020': /* ^P */
606 sv_setiv(sv, (IV)PL_perldb);
608 case '\023': /* ^S */
610 if (PL_lex_state != LEX_NOTPARSING)
613 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
618 case '\024': /* ^T */
619 if (*(mg->mg_ptr+1) == '\0') {
621 sv_setnv(sv, PL_basetime);
623 sv_setiv(sv, (IV)PL_basetime);
626 else if (strEQ(mg->mg_ptr, "\024AINT"))
627 sv_setiv(sv, PL_tainting);
629 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
630 if (*(mg->mg_ptr+1) == '\0')
631 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
632 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
633 if (PL_compiling.cop_warnings == pWARN_NONE ||
634 PL_compiling.cop_warnings == pWARN_STD)
636 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
638 else if (PL_compiling.cop_warnings == pWARN_ALL) {
639 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
642 sv_setsv(sv, PL_compiling.cop_warnings);
646 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
647 sv_setiv(sv, (IV)PL_widesyscalls);
649 case '1': case '2': case '3': case '4':
650 case '5': case '6': case '7': case '8': case '9': case '&':
651 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
655 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
656 * XXX Does the new way break anything?
658 paren = atoi(mg->mg_ptr); /* $& is in [0] */
660 if (paren <= rx->nparens &&
661 (s1 = rx->startp[paren]) != -1 &&
662 (t1 = rx->endp[paren]) != -1)
671 bool was_tainted = FALSE;
673 was_tainted = PL_tainted;
677 if (PL_reg_match_utf8 && is_utf8_string((U8*)s, i))
682 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
687 sv_setsv(sv,&PL_sv_undef);
690 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
691 paren = rx->lastparen;
695 sv_setsv(sv,&PL_sv_undef);
697 case '\016': /* ^N */
698 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
699 paren = rx->lastcloseparen;
703 sv_setsv(sv,&PL_sv_undef);
706 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
707 if ((s = rx->subbeg) && rx->startp[0] != -1) {
712 sv_setsv(sv,&PL_sv_undef);
715 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
716 if (rx->subbeg && rx->endp[0] != -1) {
717 s = rx->subbeg + rx->endp[0];
718 i = rx->sublen - rx->endp[0];
722 sv_setsv(sv,&PL_sv_undef);
726 if (GvIO(PL_last_in_gv)) {
727 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
733 sv_setiv(sv, (IV)STATUS_CURRENT);
734 #ifdef COMPLEX_STATUS
735 LvTARGOFF(sv) = PL_statusvalue;
736 LvTARGLEN(sv) = PL_statusvalue_vms;
741 s = IoTOP_NAME(GvIOp(PL_defoutgv));
745 sv_setpv(sv,GvENAME(PL_defoutgv));
750 s = IoFMT_NAME(GvIOp(PL_defoutgv));
752 s = GvENAME(PL_defoutgv);
757 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
760 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
763 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
771 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
774 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
781 sv_setpv(sv,PL_ofmt);
785 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
786 sv_setpv(sv, errno ? Strerror(errno) : "");
789 int saveerrno = errno;
790 sv_setnv(sv, (NV)errno);
792 if (errno == errno_isOS2 || errno == errno_isOS2_set)
793 sv_setpv(sv, os2error(Perl_rc));
796 sv_setpv(sv, errno ? Strerror(errno) : "");
800 SvNOK_on(sv); /* what a wonderful hack! */
803 sv_setiv(sv, (IV)PL_uid);
806 sv_setiv(sv, (IV)PL_euid);
809 sv_setiv(sv, (IV)PL_gid);
811 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
815 sv_setiv(sv, (IV)PL_egid);
817 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
822 Groups_t gary[NGROUPS];
823 i = getgroups(NGROUPS,gary);
825 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
828 (void)SvIOK_on(sv); /* what a wonderful hack! */
832 #ifndef MACOS_TRADITIONAL
836 #ifdef USE_5005THREADS
838 sv_setsv(sv, thr->errsv);
840 #endif /* USE_5005THREADS */
846 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
848 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
850 if (uf && uf->uf_val)
851 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
856 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
867 #ifdef DYNAMIC_ENV_FETCH
868 /* We just undefd an environment var. Is a replacement */
869 /* waiting in the wings? */
872 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
873 s = SvPV(*valp, len);
877 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
878 /* And you'll never guess what the dog had */
879 /* in its mouth... */
881 MgTAINTEDDIR_off(mg);
883 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
884 char pathbuf[256], eltbuf[256], *cp, *elt = s;
888 do { /* DCL$PATH may be a search list */
889 while (1) { /* as may dev portion of any element */
890 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
891 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
892 cando_by_name(S_IWUSR,0,elt) ) {
897 if ((cp = strchr(elt, ':')) != Nullch)
899 if (my_trnlnm(elt, eltbuf, j++))
905 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
908 if (s && klen == 4 && strEQ(ptr,"PATH")) {
909 char *strend = s + len;
914 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
917 if (i >= sizeof tmpbuf /* too long -- assume the worst */
919 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
926 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
932 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
935 my_setenv(MgPV(mg,n_a),Nullch);
940 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
943 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
948 magic_clear_all_env(sv,mg);
949 hv_iterinit((HV*)sv);
950 while ((entry = hv_iternext((HV*)sv))) {
952 my_setenv(hv_iterkey(entry, &keylen),
953 SvPV(hv_iterval((HV*)sv, entry), n_a));
961 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
963 #if defined(VMS) || defined(EPOC)
964 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
966 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
969 # ifdef USE_ENVIRON_ARRAY
970 # ifndef PERL_USE_SAFE_PUTENV
973 if (environ == PL_origenviron)
974 environ = (char**)safesysmalloc(sizeof(char*));
976 for (i = 0; environ[i]; i++)
977 safesysfree(environ[i]);
978 # endif /* PERL_USE_SAFE_PUTENV */
982 # endif /* USE_ENVIRON_ARRAY */
983 # endif /* PERL_IMPLICIT_SYS || WIN32 */
984 #endif /* VMS || EPC */
990 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
994 /* Are we fetching a signal entry? */
995 i = whichsig(MgPV(mg,n_a));
998 sv_setsv(sv,PL_psig_ptr[i]);
1000 Sighandler_t sigstate = rsignal_state(i);
1002 /* cache state so we don't fetch it again */
1003 if(sigstate == SIG_IGN)
1004 sv_setpv(sv,"IGNORE");
1006 sv_setsv(sv,&PL_sv_undef);
1007 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1014 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1018 /* Are we clearing a signal entry? */
1019 i = whichsig(MgPV(mg,n_a));
1021 if(PL_psig_ptr[i]) {
1022 SvREFCNT_dec(PL_psig_ptr[i]);
1025 if(PL_psig_name[i]) {
1026 SvREFCNT_dec(PL_psig_name[i]);
1034 Perl_raise_signal(pTHX_ int sig)
1036 /* Set a flag to say this signal is pending */
1037 PL_psig_pend[sig]++;
1038 /* And one to say _a_ signal is pending */
1043 Perl_csighandler(int sig)
1045 #ifdef PERL_OLD_SIGNALS
1046 /* Call the perl level handler now with risk we may be in malloc() etc. */
1047 (*PL_sighandlerp)(sig);
1050 Perl_raise_signal(aTHX_ sig);
1055 Perl_despatch_signals(pTHX)
1059 for (sig = 1; sig < SIG_SIZE; sig++) {
1060 if (PL_psig_pend[sig]) {
1061 PL_psig_pend[sig] = 0;
1062 (*PL_sighandlerp)(sig);
1068 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1077 if (strEQ(s,"__DIE__"))
1079 else if (strEQ(s,"__WARN__"))
1082 Perl_croak(aTHX_ "No such hook: %s", s);
1090 i = whichsig(s); /* ...no, a brick */
1092 if (ckWARN(WARN_SIGNAL))
1093 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1096 SvREFCNT_dec(PL_psig_name[i]);
1097 SvREFCNT_dec(PL_psig_ptr[i]);
1098 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1099 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1100 PL_psig_name[i] = newSVpvn(s, len);
1101 SvREADONLY_on(PL_psig_name[i]);
1103 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1105 (void)rsignal(i, &Perl_csighandler);
1107 *svp = SvREFCNT_inc(sv);
1110 s = SvPV_force(sv,len);
1111 if (strEQ(s,"IGNORE")) {
1113 (void)rsignal(i, SIG_IGN);
1117 else if (strEQ(s,"DEFAULT") || !*s) {
1119 (void)rsignal(i, SIG_DFL);
1125 * We should warn if HINT_STRICT_REFS, but without
1126 * access to a known hint bit in a known OP, we can't
1127 * tell whether HINT_STRICT_REFS is in force or not.
1129 if (!strchr(s,':') && !strchr(s,'\''))
1130 sv_insert(sv, 0, 0, "main::", 6);
1132 (void)rsignal(i, &Perl_csighandler);
1134 *svp = SvREFCNT_inc(sv);
1138 #endif /* !PERL_MICRO */
1141 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1143 PL_sub_generation++;
1148 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1150 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1151 PL_amagic_generation++;
1157 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1159 HV *hv = (HV*)LvTARG(sv);
1163 (void) hv_iterinit(hv);
1164 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1167 while (hv_iternext(hv))
1172 sv_setiv(sv, (IV)i);
1177 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1180 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1185 /* caller is responsible for stack switching/cleanup */
1187 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1193 PUSHs(SvTIED_obj(sv, mg));
1196 if (mg->mg_len >= 0)
1197 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1198 else if (mg->mg_len == HEf_SVKEY)
1199 PUSHs((SV*)mg->mg_ptr);
1201 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1202 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1210 return call_method(meth, flags);
1214 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1220 PUSHSTACKi(PERLSI_MAGIC);
1222 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1223 sv_setsv(sv, *PL_stack_sp--);
1233 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1235 magic_methpack(sv,mg,"FETCH");
1237 mg->mg_flags |= MGf_GSKIP;
1242 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1246 PUSHSTACKi(PERLSI_MAGIC);
1247 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1254 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1256 return magic_methpack(sv,mg,"DELETE");
1261 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1268 PUSHSTACKi(PERLSI_MAGIC);
1269 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1270 sv = *PL_stack_sp--;
1271 retval = (U32) SvIV(sv)-1;
1280 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1285 PUSHSTACKi(PERLSI_MAGIC);
1287 XPUSHs(SvTIED_obj(sv, mg));
1289 call_method("CLEAR", G_SCALAR|G_DISCARD);
1296 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1299 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1303 PUSHSTACKi(PERLSI_MAGIC);
1306 PUSHs(SvTIED_obj(sv, mg));
1311 if (call_method(meth, G_SCALAR))
1312 sv_setsv(key, *PL_stack_sp--);
1321 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1323 return magic_methpack(sv,mg,"EXISTS");
1327 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1337 svp = av_fetch(GvAV(gv),
1338 atoi(MgPV(mg,n_a)), FALSE);
1339 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1345 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1347 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1352 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1354 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1359 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1361 SV* lsv = LvTARG(sv);
1363 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1364 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1365 if (mg && mg->mg_len >= 0) {
1368 sv_pos_b2u(lsv, &i);
1369 sv_setiv(sv, i + PL_curcop->cop_arybase);
1378 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1380 SV* lsv = LvTARG(sv);
1387 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1388 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1392 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1393 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1395 else if (!SvOK(sv)) {
1399 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1401 pos = SvIV(sv) - PL_curcop->cop_arybase;
1404 ulen = sv_len_utf8(lsv);
1419 sv_pos_u2b(lsv, &p, 0);
1424 mg->mg_flags &= ~MGf_MINMATCH;
1430 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1432 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1434 gv_efullname3(sv,((GV*)sv), "*");
1438 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1443 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1452 if (*s == '*' && s[1])
1454 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1459 GvGP(sv) = gp_ref(GvGP(gv));
1464 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1467 SV *lsv = LvTARG(sv);
1468 char *tmps = SvPV(lsv,len);
1469 I32 offs = LvTARGOFF(sv);
1470 I32 rem = LvTARGLEN(sv);
1473 sv_pos_u2b(lsv, &offs, &rem);
1476 if (rem + offs > len)
1478 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1485 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1488 char *tmps = SvPV(sv, len);
1489 SV *lsv = LvTARG(sv);
1490 I32 lvoff = LvTARGOFF(sv);
1491 I32 lvlen = LvTARGLEN(sv);
1494 sv_utf8_upgrade(lsv);
1495 sv_pos_u2b(lsv, &lvoff, &lvlen);
1496 sv_insert(lsv, lvoff, lvlen, tmps, len);
1499 else if (lsv && SvUTF8(lsv)) {
1500 sv_pos_u2b(lsv, &lvoff, &lvlen);
1501 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1502 sv_insert(lsv, lvoff, lvlen, tmps, len);
1506 sv_insert(lsv, lvoff, lvlen, tmps, len);
1512 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1514 TAINT_IF((mg->mg_len & 1) ||
1515 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1520 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1522 if (PL_localizing) {
1523 if (PL_localizing == 1)
1528 else if (PL_tainted)
1536 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1538 SV *lsv = LvTARG(sv);
1545 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1550 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1552 do_vecset(sv); /* XXX slurp this routine */
1557 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1560 if (LvTARGLEN(sv)) {
1562 SV *ahv = LvTARG(sv);
1563 if (SvTYPE(ahv) == SVt_PVHV) {
1564 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1569 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1575 AV* av = (AV*)LvTARG(sv);
1576 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1577 targ = AvARRAY(av)[LvTARGOFF(sv)];
1579 if (targ && targ != &PL_sv_undef) {
1580 /* somebody else defined it for us */
1581 SvREFCNT_dec(LvTARG(sv));
1582 LvTARG(sv) = SvREFCNT_inc(targ);
1584 SvREFCNT_dec(mg->mg_obj);
1585 mg->mg_obj = Nullsv;
1586 mg->mg_flags &= ~MGf_REFCOUNTED;
1591 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1596 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1601 sv_setsv(LvTARG(sv), sv);
1602 SvSETMAGIC(LvTARG(sv));
1608 Perl_vivify_defelem(pTHX_ SV *sv)
1613 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1616 SV *ahv = LvTARG(sv);
1618 if (SvTYPE(ahv) == SVt_PVHV) {
1619 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1624 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1628 if (!value || value == &PL_sv_undef)
1629 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1632 AV* av = (AV*)LvTARG(sv);
1633 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1634 LvTARG(sv) = Nullsv; /* array can't be extended */
1636 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1637 if (!svp || (value = *svp) == &PL_sv_undef)
1638 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1641 (void)SvREFCNT_inc(value);
1642 SvREFCNT_dec(LvTARG(sv));
1645 SvREFCNT_dec(mg->mg_obj);
1646 mg->mg_obj = Nullsv;
1647 mg->mg_flags &= ~MGf_REFCOUNTED;
1651 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1653 AV *av = (AV*)mg->mg_obj;
1654 SV **svp = AvARRAY(av);
1655 I32 i = AvFILLp(av);
1657 if (svp[i] && svp[i] != &PL_sv_undef) {
1658 if (!SvWEAKREF(svp[i]))
1659 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1660 /* XXX Should we check that it hasn't changed? */
1662 (void)SvOK_off(svp[i]);
1663 SvWEAKREF_off(svp[i]);
1664 svp[i] = &PL_sv_undef;
1672 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1680 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1682 sv_unmagic(sv, PERL_MAGIC_bm);
1688 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1690 sv_unmagic(sv, PERL_MAGIC_fm);
1696 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1698 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1700 if (uf && uf->uf_set)
1701 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1706 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1708 regexp *re = (regexp *)mg->mg_obj;
1713 #ifdef USE_LOCALE_COLLATE
1715 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1718 * RenE<eacute> Descartes said "I think not."
1719 * and vanished with a faint plop.
1722 Safefree(mg->mg_ptr);
1728 #endif /* USE_LOCALE_COLLATE */
1731 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1736 switch (*mg->mg_ptr) {
1737 case '\001': /* ^A */
1738 sv_setsv(PL_bodytarget, sv);
1740 case '\003': /* ^C */
1741 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1744 case '\004': /* ^D */
1745 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1746 DEBUG_x(dump_all());
1748 case '\005': /* ^E */
1749 if (*(mg->mg_ptr+1) == '\0') {
1750 #ifdef MACOS_TRADITIONAL
1751 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1754 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1757 SetLastError( SvIV(sv) );
1760 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1762 /* will anyone ever use this? */
1763 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1769 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
1771 sv_setsv(PL_encoding, sv);
1773 PL_encoding = newSVsv(sv);
1775 case '\006': /* ^F */
1776 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1778 case '\010': /* ^H */
1779 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1781 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1783 Safefree(PL_inplace);
1785 PL_inplace = savepv(SvPV(sv,len));
1787 PL_inplace = Nullch;
1789 case '\017': /* ^O */
1790 if (*(mg->mg_ptr+1) == '\0') {
1792 Safefree(PL_osname);
1794 PL_osname = savepv(SvPV(sv,len));
1798 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1799 if (!PL_compiling.cop_io)
1800 PL_compiling.cop_io = newSVsv(sv);
1802 sv_setsv(PL_compiling.cop_io,sv);
1805 case '\020': /* ^P */
1806 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1807 if (PL_perldb && !PL_DBsingle)
1810 case '\024': /* ^T */
1812 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1814 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1817 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1818 if (*(mg->mg_ptr+1) == '\0') {
1819 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1820 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1821 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1822 | (i ? G_WARN_ON : G_WARN_OFF) ;
1825 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
1826 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1827 if (!SvPOK(sv) && PL_localizing) {
1828 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1829 PL_compiling.cop_warnings = pWARN_NONE;
1834 int accumulate = 0 ;
1835 int any_fatals = 0 ;
1836 char * ptr = (char*)SvPV(sv, len) ;
1837 for (i = 0 ; i < len ; ++i) {
1838 accumulate |= ptr[i] ;
1839 any_fatals |= (ptr[i] & 0xAA) ;
1842 PL_compiling.cop_warnings = pWARN_NONE;
1843 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1844 PL_compiling.cop_warnings = pWARN_ALL;
1845 PL_dowarn |= G_WARN_ONCE ;
1848 if (specialWARN(PL_compiling.cop_warnings))
1849 PL_compiling.cop_warnings = newSVsv(sv) ;
1851 sv_setsv(PL_compiling.cop_warnings, sv);
1852 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1853 PL_dowarn |= G_WARN_ONCE ;
1859 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
1860 PL_widesyscalls = SvTRUE(sv);
1863 if (PL_localizing) {
1864 if (PL_localizing == 1)
1865 SAVESPTR(PL_last_in_gv);
1867 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1868 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1871 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1872 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1873 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1876 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1877 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1878 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1881 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1884 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1885 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1886 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1889 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1893 IO *io = GvIOp(PL_defoutgv);
1896 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1897 IoFLAGS(io) &= ~IOf_FLUSH;
1899 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1900 PerlIO *ofp = IoOFP(io);
1902 (void)PerlIO_flush(ofp);
1903 IoFLAGS(io) |= IOf_FLUSH;
1909 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1910 PL_multiline = (i != 0);
1913 SvREFCNT_dec(PL_rs);
1914 PL_rs = newSVsv(sv);
1918 SvREFCNT_dec(PL_ors_sv);
1919 if (SvOK(sv) || SvGMAGICAL(sv)) {
1920 PL_ors_sv = newSVsv(sv);
1928 SvREFCNT_dec(PL_ofs_sv);
1929 if (SvOK(sv) || SvGMAGICAL(sv)) {
1930 PL_ofs_sv = newSVsv(sv);
1939 PL_ofmt = savepv(SvPV(sv,len));
1942 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1945 #ifdef COMPLEX_STATUS
1946 if (PL_localizing == 2) {
1947 PL_statusvalue = LvTARGOFF(sv);
1948 PL_statusvalue_vms = LvTARGLEN(sv);
1952 #ifdef VMSISH_STATUS
1954 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1957 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1960 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1961 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1964 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1965 if (PL_delaymagic) {
1966 PL_delaymagic |= DM_RUID;
1967 break; /* don't do magic till later */
1970 (void)setruid((Uid_t)PL_uid);
1973 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1975 #ifdef HAS_SETRESUID
1976 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1978 if (PL_uid == PL_euid) /* special case $< = $> */
1979 (void)PerlProc_setuid(PL_uid);
1981 PL_uid = PerlProc_getuid();
1982 Perl_croak(aTHX_ "setruid() not implemented");
1987 PL_uid = PerlProc_getuid();
1988 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1991 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1992 if (PL_delaymagic) {
1993 PL_delaymagic |= DM_EUID;
1994 break; /* don't do magic till later */
1997 (void)seteuid((Uid_t)PL_euid);
2000 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2002 #ifdef HAS_SETRESUID
2003 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2005 if (PL_euid == PL_uid) /* special case $> = $< */
2006 PerlProc_setuid(PL_euid);
2008 PL_euid = PerlProc_geteuid();
2009 Perl_croak(aTHX_ "seteuid() not implemented");
2014 PL_euid = PerlProc_geteuid();
2015 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2018 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2019 if (PL_delaymagic) {
2020 PL_delaymagic |= DM_RGID;
2021 break; /* don't do magic till later */
2024 (void)setrgid((Gid_t)PL_gid);
2027 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2029 #ifdef HAS_SETRESGID
2030 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2032 if (PL_gid == PL_egid) /* special case $( = $) */
2033 (void)PerlProc_setgid(PL_gid);
2035 PL_gid = PerlProc_getgid();
2036 Perl_croak(aTHX_ "setrgid() not implemented");
2041 PL_gid = PerlProc_getgid();
2042 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2045 #ifdef HAS_SETGROUPS
2047 char *p = SvPV(sv, len);
2048 Groups_t gary[NGROUPS];
2053 for (i = 0; i < NGROUPS; ++i) {
2054 while (*p && !isSPACE(*p))
2063 (void)setgroups(i, gary);
2065 #else /* HAS_SETGROUPS */
2066 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2067 #endif /* HAS_SETGROUPS */
2068 if (PL_delaymagic) {
2069 PL_delaymagic |= DM_EGID;
2070 break; /* don't do magic till later */
2073 (void)setegid((Gid_t)PL_egid);
2076 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2078 #ifdef HAS_SETRESGID
2079 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2081 if (PL_egid == PL_gid) /* special case $) = $( */
2082 (void)PerlProc_setgid(PL_egid);
2084 PL_egid = PerlProc_getegid();
2085 Perl_croak(aTHX_ "setegid() not implemented");
2090 PL_egid = PerlProc_getegid();
2091 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2094 PL_chopset = SvPV_force(sv,len);
2096 #ifndef MACOS_TRADITIONAL
2098 #ifdef HAS_SETPROCTITLE
2099 /* The BSDs don't show the argv[] in ps(1) output, they
2100 * show a string from the process struct and provide
2101 * the setproctitle() routine to manipulate that. */
2104 # if __FreeBSD_version > 410001
2105 /* The leading "-" removes the "perl: " prefix,
2106 * but not the "(perl) suffix from the ps(1)
2107 * output, because that's what ps(1) shows if the
2108 * argv[] is modified. */
2109 setproctitle("-%s", s);
2110 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2111 /* This doesn't really work if you assume that
2112 * $0 = 'foobar'; will wipe out 'perl' from the $0
2113 * because in ps(1) output the result will be like
2114 * sprintf("perl: %s (perl)", s)
2115 * I guess this is a security feature:
2116 * one (a user process) cannot get rid of the original name.
2118 setproctitle("%s", s);
2125 /* See if all the arguments are contiguous in memory */
2126 for (i = 1; i < PL_origargc; i++) {
2127 if (PL_origargv[i] == s + 1
2129 || PL_origargv[i] == s + 2
2134 s += strlen(s); /* this one is ok too */
2139 /* can grab env area too? */
2140 if (PL_origenviron && (PL_origenviron[0] == s + 1)) {
2141 my_setenv("NoNe SuCh", Nullch);
2142 /* force copy of environment */
2143 for (i = 0; PL_origenviron[i]; i++)
2144 if (PL_origenviron[i] == s + 1) {
2151 PL_origalen = s - PL_origargv[0];
2153 s = SvPV_force(sv,len);
2155 if (i >= PL_origalen) {
2157 /* don't allow system to limit $0 seen by script */
2158 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2159 Copy(s, PL_origargv[0], i, char);
2160 s = PL_origargv[0]+i;
2164 Copy(s, PL_origargv[0], i, char);
2165 s = PL_origargv[0]+i;
2167 while (++i < PL_origalen)
2169 s = PL_origargv[0]+i;
2170 for (i = 1; i < PL_origargc; i++)
2171 PL_origargv[i] = Nullch;
2175 #ifdef USE_5005THREADS
2177 sv_setsv(thr->errsv, sv);
2179 #endif /* USE_5005THREADS */
2184 #ifdef USE_5005THREADS
2186 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2188 DEBUG_S(PerlIO_printf(Perl_debug_log,
2189 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2190 PTR2UV(thr), PTR2UV(sv)));
2192 Perl_croak(aTHX_ "panic: magic_mutexfree");
2193 MUTEX_DESTROY(MgMUTEXP(mg));
2194 COND_DESTROY(MgCONDP(mg));
2197 #endif /* USE_5005THREADS */
2200 Perl_whichsig(pTHX_ char *sig)
2202 register char **sigv;
2204 for (sigv = PL_sig_name+1; *sigv; sigv++)
2205 if (strEQ(sig,*sigv))
2206 return PL_sig_num[sigv - PL_sig_name];
2208 if (strEQ(sig,"CHLD"))
2212 if (strEQ(sig,"CLD"))
2218 #if !defined(PERL_IMPLICIT_CONTEXT)
2223 Perl_sighandler(int sig)
2225 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2226 dTHXa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2233 SV *sv = Nullsv, *tSv = PL_Sv;
2239 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2240 PERL_SET_THX(aTHX); /* fake TLS, see above */
2243 if (PL_savestack_ix + 15 <= PL_savestack_max)
2245 if (PL_markstack_ptr < PL_markstack_max - 2)
2247 if (PL_retstack_ix < PL_retstack_max - 2)
2249 if (PL_scopestack_ix < PL_scopestack_max - 3)
2252 if (!PL_psig_ptr[sig])
2253 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2256 /* Max number of items pushed there is 3*n or 4. We cannot fix
2257 infinity, so we fix 4 (in fact 5): */
2259 PL_savestack_ix += 5; /* Protect save in progress. */
2260 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2263 PL_markstack_ptr++; /* Protect mark. */
2266 PL_retstack[PL_retstack_ix] = NULL;
2269 PL_scopestack_ix += 1;
2270 /* sv_2cv is too complicated, try a simpler variant first: */
2271 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2272 || SvTYPE(cv) != SVt_PVCV)
2273 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2275 if (!cv || !CvROOT(cv)) {
2276 if (ckWARN(WARN_SIGNAL))
2277 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2278 PL_sig_name[sig], (gv ? GvENAME(gv)
2285 if(PL_psig_name[sig]) {
2286 sv = SvREFCNT_inc(PL_psig_name[sig]);
2288 #if !defined(PERL_IMPLICIT_CONTEXT)
2292 sv = sv_newmortal();
2293 sv_setpv(sv,PL_sig_name[sig]);
2296 PUSHSTACKi(PERLSI_SIGNAL);
2301 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2304 if (SvTRUE(ERRSV)) {
2306 #ifdef HAS_SIGPROCMASK
2307 /* Handler "died", for example to get out of a restart-able read().
2308 * Before we re-do that on its behalf re-enable the signal which was
2309 * blocked by the system when we entered.
2313 sigaddset(&set,sig);
2314 sigprocmask(SIG_UNBLOCK, &set, NULL);
2316 /* Not clear if this will work */
2317 (void)rsignal(sig, SIG_IGN);
2318 (void)rsignal(sig, &Perl_csighandler);
2320 #endif /* !PERL_MICRO */
2321 Perl_die(aTHX_ Nullformat);
2325 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2331 PL_scopestack_ix -= 1;
2334 PL_op = myop; /* Apparently not needed... */
2336 PL_Sv = tSv; /* Restore global temporaries. */
2343 restore_magic(pTHX_ void *p)
2345 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2346 SV* sv = mgs->mgs_sv;
2351 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2354 SvFLAGS(sv) |= mgs->mgs_flags;
2358 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2361 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2363 /* If we're still on top of the stack, pop us off. (That condition
2364 * will be satisfied if restore_magic was called explicitly, but *not*
2365 * if it's being called via leave_scope.)
2366 * The reason for doing this is that otherwise, things like sv_2cv()
2367 * may leave alloc gunk on the savestack, and some code
2368 * (e.g. sighandler) doesn't expect that...
2370 if (PL_savestack_ix == mgs->mgs_ss_ix)
2372 I32 popval = SSPOPINT;
2373 assert(popval == SAVEt_DESTRUCTOR_X);
2374 PL_savestack_ix -= 2;
2376 assert(popval == SAVEt_ALLOC);
2378 PL_savestack_ix -= popval;
2384 unwind_handler_stack(pTHX_ void *p)
2386 U32 flags = *(U32*)p;
2389 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2390 /* cxstack_ix-- Not needed, die already unwound it. */
2391 #if !defined(PERL_IMPLICIT_CONTEXT)
2393 SvREFCNT_dec(sig_sv);