3 * Copyright (c) 1991-2002, 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."
16 =head1 Magical Functions
23 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
32 /* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
33 #if !defined(HAS_SIGACTION) && defined(VMS)
34 # define FAKE_PERSISTENT_SIGNAL_HANDLERS
36 /* if we're doing kill() with sys$sigprc on VMS, FAKE_DEFAULT_SIGNAL_HANDLERS */
37 #if defined(KILL_BY_SIGPRC)
38 # define FAKE_DEFAULT_SIGNAL_HANDLERS
41 static void restore_magic(pTHX_ void *p);
42 static void unwind_handler_stack(pTHX_ void *p);
45 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
53 /* MGS is typedef'ed to struct magic_state in perl.h */
56 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
59 assert(SvMAGICAL(sv));
61 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
63 mgs = SSPTR(mgs_ix, MGS*);
65 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
66 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
70 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
74 =for apidoc mg_magical
76 Turns on the magical status of an SV. See C<sv_magic>.
82 Perl_mg_magical(pTHX_ SV *sv)
85 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
86 MGVTBL* vtbl = mg->mg_virtual;
88 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
92 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
101 Do magic after a value is retrieved from the SV. See C<sv_magic>.
107 Perl_mg_get(pTHX_ SV *sv)
110 MAGIC *newmg, *head, *cur, *mg;
111 I32 mgs_ix = SSNEW(sizeof(MGS));
113 save_magic(mgs_ix, sv);
115 /* We must call svt_get(sv, mg) for each valid entry in the linked
116 list of magic. svt_get() may delete the current entry, add new
117 magic to the head of the list, or upgrade the SV. AMS 20010810 */
119 newmg = cur = head = mg = SvMAGIC(sv);
121 MGVTBL *vtbl = mg->mg_virtual;
123 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
124 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
125 /* Don't restore the flags for this entry if it was deleted. */
126 if (mg->mg_flags & MGf_GSKIP)
127 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
130 mg = mg->mg_moremagic;
133 /* Have we finished with the new entries we saw? Start again
134 where we left off (unless there are more new entries). */
142 /* Were any new entries added? */
143 if (!new && (newmg = SvMAGIC(sv)) != head) {
150 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
157 Do magic after a value is assigned to the SV. See C<sv_magic>.
163 Perl_mg_set(pTHX_ SV *sv)
169 mgs_ix = SSNEW(sizeof(MGS));
170 save_magic(mgs_ix, sv);
172 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
173 MGVTBL* vtbl = mg->mg_virtual;
174 nextmg = mg->mg_moremagic; /* it may delete itself */
175 if (mg->mg_flags & MGf_GSKIP) {
176 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
177 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
179 if (vtbl && vtbl->svt_set)
180 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
183 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
188 =for apidoc mg_length
190 Report on the SV's length. See C<sv_magic>.
196 Perl_mg_length(pTHX_ SV *sv)
201 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
202 MGVTBL* vtbl = mg->mg_virtual;
203 if (vtbl && vtbl->svt_len) {
206 mgs_ix = SSNEW(sizeof(MGS));
207 save_magic(mgs_ix, sv);
208 /* omit MGf_GSKIP -- not changed here */
209 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
210 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
217 U8 *s = (U8*)SvPV(sv, len);
218 len = Perl_utf8_length(aTHX_ s, s + len);
226 Perl_mg_size(pTHX_ SV *sv)
231 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
232 MGVTBL* vtbl = mg->mg_virtual;
233 if (vtbl && vtbl->svt_len) {
236 mgs_ix = SSNEW(sizeof(MGS));
237 save_magic(mgs_ix, sv);
238 /* omit MGf_GSKIP -- not changed here */
239 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
240 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
247 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
252 Perl_croak(aTHX_ "Size magic not implemented");
261 Clear something magical that the SV represents. See C<sv_magic>.
267 Perl_mg_clear(pTHX_ SV *sv)
272 mgs_ix = SSNEW(sizeof(MGS));
273 save_magic(mgs_ix, sv);
275 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
276 MGVTBL* vtbl = mg->mg_virtual;
277 /* omit GSKIP -- never set here */
279 if (vtbl && vtbl->svt_clear)
280 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
283 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
290 Finds the magic pointer for type matching the SV. See C<sv_magic>.
296 Perl_mg_find(pTHX_ SV *sv, int type)
301 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
302 if (mg->mg_type == type)
311 Copies the magic from one SV to another. See C<sv_magic>.
317 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
321 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
322 MGVTBL* vtbl = mg->mg_virtual;
323 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
324 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
326 else if (isUPPER(mg->mg_type)) {
328 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
329 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
331 toLOWER(mg->mg_type), key, klen);
341 Free any magic storage used by the SV. See C<sv_magic>.
347 Perl_mg_free(pTHX_ SV *sv)
351 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
352 MGVTBL* vtbl = mg->mg_virtual;
353 moremagic = mg->mg_moremagic;
354 if (vtbl && vtbl->svt_free)
355 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
356 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
358 Safefree(mg->mg_ptr);
359 else if (mg->mg_len == HEf_SVKEY)
360 SvREFCNT_dec((SV*)mg->mg_ptr);
362 if (mg->mg_flags & MGf_REFCOUNTED)
363 SvREFCNT_dec(mg->mg_obj);
371 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
376 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
380 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
381 if (mg->mg_obj) /* @+ */
384 return rx->lastparen;
391 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
399 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
403 if (paren <= rx->nparens &&
404 (s = rx->startp[paren]) != -1 &&
405 (t = rx->endp[paren]) != -1)
407 if (mg->mg_obj) /* @+ */
412 if (i > 0 && PL_reg_match_utf8) {
413 char *b = rx->subbeg;
415 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
425 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
427 Perl_croak(aTHX_ PL_no_modify);
433 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
440 switch (*mg->mg_ptr) {
441 case '1': case '2': case '3': case '4':
442 case '5': case '6': case '7': case '8': case '9': case '&':
443 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
445 paren = atoi(mg->mg_ptr); /* $& is in [0] */
447 if (paren <= rx->nparens &&
448 (s1 = rx->startp[paren]) != -1 &&
449 (t1 = rx->endp[paren]) != -1)
453 if (i > 0 && PL_reg_match_utf8) {
454 char *s = rx->subbeg + s1;
455 char *send = rx->subbeg + t1;
457 if (is_utf8_string((U8*)s, i))
458 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
461 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
465 if (ckWARN(WARN_UNINITIALIZED))
470 if (ckWARN(WARN_UNINITIALIZED))
475 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
476 paren = rx->lastparen;
481 case '\016': /* ^N */
482 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
483 paren = rx->lastcloseparen;
489 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
490 if (rx->startp[0] != -1) {
501 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
502 if (rx->endp[0] != -1) {
503 i = rx->sublen - rx->endp[0];
514 if (!SvPOK(sv) && SvNIOK(sv)) {
524 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
531 switch (*mg->mg_ptr) {
532 case '\001': /* ^A */
533 sv_setsv(sv, PL_bodytarget);
535 case '\003': /* ^C */
536 sv_setiv(sv, (IV)PL_minus_c);
539 case '\004': /* ^D */
540 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
541 #if defined(YYDEBUG) && defined(DEBUGGING)
542 PL_yydebug = DEBUG_p_TEST;
545 case '\005': /* ^E */
546 if (*(mg->mg_ptr+1) == '\0') {
547 #ifdef MACOS_TRADITIONAL
551 sv_setnv(sv,(double)gMacPerl_OSErr);
552 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
557 # include <descrip.h>
558 # include <starlet.h>
560 $DESCRIPTOR(msgdsc,msg);
561 sv_setnv(sv,(NV) vaxc$errno);
562 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
563 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
569 if (!(_emx_env & 0x200)) { /* Under DOS */
570 sv_setnv(sv, (NV)errno);
571 sv_setpv(sv, errno ? Strerror(errno) : "");
573 if (errno != errno_isOS2) {
574 int tmp = _syserrno();
575 if (tmp) /* 2nd call to _syserrno() makes it 0 */
578 sv_setnv(sv, (NV)Perl_rc);
579 sv_setpv(sv, os2error(Perl_rc));
584 DWORD dwErr = GetLastError();
585 sv_setnv(sv, (NV)dwErr);
588 PerlProc_GetOSError(sv, dwErr);
595 sv_setnv(sv, (NV)errno);
596 sv_setpv(sv, errno ? Strerror(errno) : "");
601 SvNOK_on(sv); /* what a wonderful hack! */
603 else if (strEQ(mg->mg_ptr+1, "NCODING"))
604 sv_setsv(sv, PL_encoding);
606 case '\006': /* ^F */
607 sv_setiv(sv, (IV)PL_maxsysfd);
609 case '\010': /* ^H */
610 sv_setiv(sv, (IV)PL_hints);
612 case '\011': /* ^I */ /* NOT \t in EBCDIC */
614 sv_setpv(sv, PL_inplace);
616 sv_setsv(sv, &PL_sv_undef);
618 case '\017': /* ^O & ^OPEN */
619 if (*(mg->mg_ptr+1) == '\0')
620 sv_setpv(sv, PL_osname);
621 else if (strEQ(mg->mg_ptr, "\017PEN")) {
622 if (!PL_compiling.cop_io)
623 sv_setsv(sv, &PL_sv_undef);
625 sv_setsv(sv, PL_compiling.cop_io);
629 case '\020': /* ^P */
630 sv_setiv(sv, (IV)PL_perldb);
632 case '\023': /* ^S */
634 if (PL_lex_state != LEX_NOTPARSING)
637 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
642 case '\024': /* ^T */
643 if (*(mg->mg_ptr+1) == '\0') {
645 sv_setnv(sv, PL_basetime);
647 sv_setiv(sv, (IV)PL_basetime);
650 else if (strEQ(mg->mg_ptr, "\024AINT"))
651 sv_setiv(sv, PL_tainting);
653 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
654 if (*(mg->mg_ptr+1) == '\0')
655 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
656 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
657 if (PL_compiling.cop_warnings == pWARN_NONE ||
658 PL_compiling.cop_warnings == pWARN_STD)
660 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
662 else if (PL_compiling.cop_warnings == pWARN_ALL) {
663 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
666 sv_setsv(sv, PL_compiling.cop_warnings);
670 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
671 sv_setiv(sv, (IV)PL_widesyscalls);
673 case '1': case '2': case '3': case '4':
674 case '5': case '6': case '7': case '8': case '9': case '&':
675 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
679 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
680 * XXX Does the new way break anything?
682 paren = atoi(mg->mg_ptr); /* $& is in [0] */
684 if (paren <= rx->nparens &&
685 (s1 = rx->startp[paren]) != -1 &&
686 (t1 = rx->endp[paren]) != -1)
695 bool was_tainted = FALSE;
697 was_tainted = PL_tainted;
701 if (PL_reg_match_utf8 && is_utf8_string((U8*)s, i))
706 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
711 sv_setsv(sv,&PL_sv_undef);
714 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
715 paren = rx->lastparen;
719 sv_setsv(sv,&PL_sv_undef);
721 case '\016': /* ^N */
722 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
723 paren = rx->lastcloseparen;
727 sv_setsv(sv,&PL_sv_undef);
730 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
731 if ((s = rx->subbeg) && rx->startp[0] != -1) {
736 sv_setsv(sv,&PL_sv_undef);
739 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
740 if (rx->subbeg && rx->endp[0] != -1) {
741 s = rx->subbeg + rx->endp[0];
742 i = rx->sublen - rx->endp[0];
746 sv_setsv(sv,&PL_sv_undef);
750 if (GvIO(PL_last_in_gv)) {
751 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
757 sv_setiv(sv, (IV)STATUS_CURRENT);
758 #ifdef COMPLEX_STATUS
759 LvTARGOFF(sv) = PL_statusvalue;
760 LvTARGLEN(sv) = PL_statusvalue_vms;
765 s = IoTOP_NAME(GvIOp(PL_defoutgv));
769 sv_setpv(sv,GvENAME(PL_defoutgv));
774 s = IoFMT_NAME(GvIOp(PL_defoutgv));
776 s = GvENAME(PL_defoutgv);
781 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
784 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
787 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
795 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
798 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
804 sv_setpv(sv,SvPVX(PL_ors_sv));
807 sv_setpv(sv,PL_ofmt);
811 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
812 sv_setpv(sv, errno ? Strerror(errno) : "");
815 int saveerrno = errno;
816 sv_setnv(sv, (NV)errno);
818 if (errno == errno_isOS2 || errno == errno_isOS2_set)
819 sv_setpv(sv, os2error(Perl_rc));
822 sv_setpv(sv, errno ? Strerror(errno) : "");
826 SvNOK_on(sv); /* what a wonderful hack! */
829 sv_setiv(sv, (IV)PL_uid);
832 sv_setiv(sv, (IV)PL_euid);
835 sv_setiv(sv, (IV)PL_gid);
837 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
841 sv_setiv(sv, (IV)PL_egid);
843 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
848 Groups_t gary[NGROUPS];
849 i = getgroups(NGROUPS,gary);
851 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
854 (void)SvIOK_on(sv); /* what a wonderful hack! */
858 #ifndef MACOS_TRADITIONAL
862 #ifdef USE_5005THREADS
864 sv_setsv(sv, thr->errsv);
866 #endif /* USE_5005THREADS */
872 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
874 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
876 if (uf && uf->uf_val)
877 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
882 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
892 #ifdef DYNAMIC_ENV_FETCH
893 /* We just undefd an environment var. Is a replacement */
894 /* waiting in the wings? */
897 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
898 s = SvPV(*valp, len);
902 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
903 /* And you'll never guess what the dog had */
904 /* in its mouth... */
906 MgTAINTEDDIR_off(mg);
908 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
909 char pathbuf[256], eltbuf[256], *cp, *elt = s;
913 do { /* DCL$PATH may be a search list */
914 while (1) { /* as may dev portion of any element */
915 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
916 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
917 cando_by_name(S_IWUSR,0,elt) ) {
922 if ((cp = strchr(elt, ':')) != Nullch)
924 if (my_trnlnm(elt, eltbuf, j++))
930 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
933 if (s && klen == 4 && strEQ(ptr,"PATH")) {
934 char *strend = s + len;
940 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
943 if (i >= sizeof tmpbuf /* too long -- assume the worst */
945 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
952 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
958 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
961 my_setenv(MgPV(mg,n_a),Nullch);
966 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
969 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
974 magic_clear_all_env(sv,mg);
975 hv_iterinit((HV*)sv);
976 while ((entry = hv_iternext((HV*)sv))) {
978 my_setenv(hv_iterkey(entry, &keylen),
979 SvPV(hv_iterval((HV*)sv, entry), n_a));
987 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
989 #if defined(VMS) || defined(EPOC)
990 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
992 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
995 # ifdef USE_ENVIRON_ARRAY
996 # ifndef PERL_USE_SAFE_PUTENV
999 if (environ == PL_origenviron)
1000 environ = (char**)safesysmalloc(sizeof(char*));
1002 for (i = 0; environ[i]; i++)
1003 safesysfree(environ[i]);
1004 # endif /* PERL_USE_SAFE_PUTENV */
1006 environ[0] = Nullch;
1008 # endif /* USE_ENVIRON_ARRAY */
1009 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1010 #endif /* VMS || EPC */
1014 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1015 static int sig_handlers_initted = 0;
1017 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1018 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1020 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1021 static int sig_defaulting[SIG_SIZE];
1026 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1030 /* Are we fetching a signal entry? */
1031 i = whichsig(MgPV(mg,n_a));
1034 sv_setsv(sv,PL_psig_ptr[i]);
1036 Sighandler_t sigstate;
1037 sigstate = rsignal_state(i);
1038 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1039 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1041 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1042 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1044 /* cache state so we don't fetch it again */
1045 if(sigstate == SIG_IGN)
1046 sv_setpv(sv,"IGNORE");
1048 sv_setsv(sv,&PL_sv_undef);
1049 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1056 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1060 /* Are we clearing a signal entry? */
1061 i = whichsig(MgPV(mg,n_a));
1063 if(PL_psig_ptr[i]) {
1064 SvREFCNT_dec(PL_psig_ptr[i]);
1067 if(PL_psig_name[i]) {
1068 SvREFCNT_dec(PL_psig_name[i]);
1076 Perl_raise_signal(pTHX_ int sig)
1078 /* Set a flag to say this signal is pending */
1079 PL_psig_pend[sig]++;
1080 /* And one to say _a_ signal is pending */
1085 Perl_csighandler(int sig)
1087 #ifdef PERL_GET_SIG_CONTEXT
1088 dTHXa(PERL_GET_SIG_CONTEXT);
1092 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1093 (void) rsignal(sig, &Perl_csighandler);
1094 if (sig_ignoring[sig]) return;
1096 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1097 if (sig_defaulting[sig])
1098 #ifdef KILL_BY_SIGPRC
1099 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1105 #ifdef PERL_OLD_SIGNALS
1106 /* Call the perl level handler now with risk we may be in malloc() etc. */
1107 (*PL_sighandlerp)(sig);
1109 Perl_raise_signal(aTHX_ sig);
1113 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1115 Perl_csighandler_init(void)
1118 if (sig_handlers_initted) return;
1120 for (sig = 1; sig < SIG_SIZE; sig++) {
1121 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1123 sig_defaulting[sig] = 1;
1124 (void) rsignal(sig, &Perl_csighandler);
1126 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1127 sig_ignoring[sig] = 0;
1130 sig_handlers_initted = 1;
1135 Perl_despatch_signals(pTHX)
1139 for (sig = 1; sig < SIG_SIZE; sig++) {
1140 if (PL_psig_pend[sig]) {
1141 PL_psig_pend[sig] = 0;
1142 (*PL_sighandlerp)(sig);
1148 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1157 if (strEQ(s,"__DIE__"))
1159 else if (strEQ(s,"__WARN__"))
1162 Perl_croak(aTHX_ "No such hook: %s", s);
1170 i = whichsig(s); /* ...no, a brick */
1172 if (ckWARN(WARN_SIGNAL))
1173 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1176 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1177 if (!sig_handlers_initted) Perl_csighandler_init();
1179 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1180 sig_ignoring[i] = 0;
1182 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1183 sig_defaulting[i] = 0;
1185 SvREFCNT_dec(PL_psig_name[i]);
1186 SvREFCNT_dec(PL_psig_ptr[i]);
1187 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1188 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1189 PL_psig_name[i] = newSVpvn(s, len);
1190 SvREADONLY_on(PL_psig_name[i]);
1192 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1194 (void)rsignal(i, &Perl_csighandler);
1196 *svp = SvREFCNT_inc(sv);
1199 s = SvPV_force(sv,len);
1200 if (strEQ(s,"IGNORE")) {
1202 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1203 sig_ignoring[i] = 1;
1204 (void)rsignal(i, &Perl_csighandler);
1206 (void)rsignal(i, SIG_IGN);
1211 else if (strEQ(s,"DEFAULT") || !*s) {
1213 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1215 sig_defaulting[i] = 1;
1216 (void)rsignal(i, &Perl_csighandler);
1219 (void)rsignal(i, SIG_DFL);
1226 * We should warn if HINT_STRICT_REFS, but without
1227 * access to a known hint bit in a known OP, we can't
1228 * tell whether HINT_STRICT_REFS is in force or not.
1230 if (!strchr(s,':') && !strchr(s,'\''))
1231 sv_insert(sv, 0, 0, "main::", 6);
1233 (void)rsignal(i, &Perl_csighandler);
1235 *svp = SvREFCNT_inc(sv);
1239 #endif /* !PERL_MICRO */
1242 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1244 PL_sub_generation++;
1249 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1251 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1252 PL_amagic_generation++;
1258 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1260 HV *hv = (HV*)LvTARG(sv);
1264 (void) hv_iterinit(hv);
1265 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1268 while (hv_iternext(hv))
1273 sv_setiv(sv, (IV)i);
1278 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1281 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1286 /* caller is responsible for stack switching/cleanup */
1288 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1294 PUSHs(SvTIED_obj(sv, mg));
1297 if (mg->mg_len >= 0)
1298 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1299 else if (mg->mg_len == HEf_SVKEY)
1300 PUSHs((SV*)mg->mg_ptr);
1302 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1303 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1311 return call_method(meth, flags);
1315 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1321 PUSHSTACKi(PERLSI_MAGIC);
1323 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1324 sv_setsv(sv, *PL_stack_sp--);
1334 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1336 magic_methpack(sv,mg,"FETCH");
1338 mg->mg_flags |= MGf_GSKIP;
1343 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1347 PUSHSTACKi(PERLSI_MAGIC);
1348 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1355 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1357 return magic_methpack(sv,mg,"DELETE");
1362 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1369 PUSHSTACKi(PERLSI_MAGIC);
1370 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1371 sv = *PL_stack_sp--;
1372 retval = (U32) SvIV(sv)-1;
1381 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1386 PUSHSTACKi(PERLSI_MAGIC);
1388 XPUSHs(SvTIED_obj(sv, mg));
1390 call_method("CLEAR", G_SCALAR|G_DISCARD);
1397 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1400 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1404 PUSHSTACKi(PERLSI_MAGIC);
1407 PUSHs(SvTIED_obj(sv, mg));
1412 if (call_method(meth, G_SCALAR))
1413 sv_setsv(key, *PL_stack_sp--);
1422 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1424 return magic_methpack(sv,mg,"EXISTS");
1428 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1438 svp = av_fetch(GvAV(gv),
1439 atoi(MgPV(mg,n_a)), FALSE);
1440 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1446 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1448 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1453 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1455 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1460 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1462 SV* lsv = LvTARG(sv);
1464 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1465 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1466 if (mg && mg->mg_len >= 0) {
1469 sv_pos_b2u(lsv, &i);
1470 sv_setiv(sv, i + PL_curcop->cop_arybase);
1479 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1481 SV* lsv = LvTARG(sv);
1488 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1489 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1493 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1494 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1496 else if (!SvOK(sv)) {
1500 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1502 pos = SvIV(sv) - PL_curcop->cop_arybase;
1505 ulen = sv_len_utf8(lsv);
1520 sv_pos_u2b(lsv, &p, 0);
1525 mg->mg_flags &= ~MGf_MINMATCH;
1531 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1533 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1535 gv_efullname3(sv,((GV*)sv), "*");
1539 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1544 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1553 if (*s == '*' && s[1])
1555 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1560 GvGP(sv) = gp_ref(GvGP(gv));
1565 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1568 SV *lsv = LvTARG(sv);
1569 char *tmps = SvPV(lsv,len);
1570 I32 offs = LvTARGOFF(sv);
1571 I32 rem = LvTARGLEN(sv);
1574 sv_pos_u2b(lsv, &offs, &rem);
1577 if (rem + offs > len)
1579 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1586 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1589 char *tmps = SvPV(sv, len);
1590 SV *lsv = LvTARG(sv);
1591 I32 lvoff = LvTARGOFF(sv);
1592 I32 lvlen = LvTARGLEN(sv);
1595 sv_utf8_upgrade(lsv);
1596 sv_pos_u2b(lsv, &lvoff, &lvlen);
1597 sv_insert(lsv, lvoff, lvlen, tmps, len);
1600 else if (lsv && SvUTF8(lsv)) {
1601 sv_pos_u2b(lsv, &lvoff, &lvlen);
1602 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1603 sv_insert(lsv, lvoff, lvlen, tmps, len);
1607 sv_insert(lsv, lvoff, lvlen, tmps, len);
1613 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1615 TAINT_IF((mg->mg_len & 1) ||
1616 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1621 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1623 if (PL_localizing) {
1624 if (PL_localizing == 1)
1629 else if (PL_tainted)
1637 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1639 SV *lsv = LvTARG(sv);
1646 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1651 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1653 do_vecset(sv); /* XXX slurp this routine */
1658 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1661 if (LvTARGLEN(sv)) {
1663 SV *ahv = LvTARG(sv);
1664 if (SvTYPE(ahv) == SVt_PVHV) {
1665 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1670 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1676 AV* av = (AV*)LvTARG(sv);
1677 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1678 targ = AvARRAY(av)[LvTARGOFF(sv)];
1680 if (targ && targ != &PL_sv_undef) {
1681 /* somebody else defined it for us */
1682 SvREFCNT_dec(LvTARG(sv));
1683 LvTARG(sv) = SvREFCNT_inc(targ);
1685 SvREFCNT_dec(mg->mg_obj);
1686 mg->mg_obj = Nullsv;
1687 mg->mg_flags &= ~MGf_REFCOUNTED;
1692 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1697 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1702 sv_setsv(LvTARG(sv), sv);
1703 SvSETMAGIC(LvTARG(sv));
1709 Perl_vivify_defelem(pTHX_ SV *sv)
1714 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1717 SV *ahv = LvTARG(sv);
1719 if (SvTYPE(ahv) == SVt_PVHV) {
1720 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1725 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1729 if (!value || value == &PL_sv_undef)
1730 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1733 AV* av = (AV*)LvTARG(sv);
1734 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1735 LvTARG(sv) = Nullsv; /* array can't be extended */
1737 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1738 if (!svp || (value = *svp) == &PL_sv_undef)
1739 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1742 (void)SvREFCNT_inc(value);
1743 SvREFCNT_dec(LvTARG(sv));
1746 SvREFCNT_dec(mg->mg_obj);
1747 mg->mg_obj = Nullsv;
1748 mg->mg_flags &= ~MGf_REFCOUNTED;
1752 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1754 AV *av = (AV*)mg->mg_obj;
1755 SV **svp = AvARRAY(av);
1756 I32 i = AvFILLp(av);
1758 if (svp[i] && svp[i] != &PL_sv_undef) {
1759 if (!SvWEAKREF(svp[i]))
1760 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1761 /* XXX Should we check that it hasn't changed? */
1763 (void)SvOK_off(svp[i]);
1764 SvWEAKREF_off(svp[i]);
1765 svp[i] = &PL_sv_undef;
1773 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1781 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1783 sv_unmagic(sv, PERL_MAGIC_bm);
1789 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1791 sv_unmagic(sv, PERL_MAGIC_fm);
1797 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1799 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1801 if (uf && uf->uf_set)
1802 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1807 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1809 regexp *re = (regexp *)mg->mg_obj;
1814 #ifdef USE_LOCALE_COLLATE
1816 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1819 * RenE<eacute> Descartes said "I think not."
1820 * and vanished with a faint plop.
1823 Safefree(mg->mg_ptr);
1829 #endif /* USE_LOCALE_COLLATE */
1832 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1837 switch (*mg->mg_ptr) {
1838 case '\001': /* ^A */
1839 sv_setsv(PL_bodytarget, sv);
1841 case '\003': /* ^C */
1842 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1845 case '\004': /* ^D */
1846 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1847 DEBUG_x(dump_all());
1849 case '\005': /* ^E */
1850 if (*(mg->mg_ptr+1) == '\0') {
1851 #ifdef MACOS_TRADITIONAL
1852 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1855 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1858 SetLastError( SvIV(sv) );
1861 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1863 /* will anyone ever use this? */
1864 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1870 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
1872 sv_setsv(PL_encoding, sv);
1874 PL_encoding = newSVsv(sv);
1876 case '\006': /* ^F */
1877 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1879 case '\010': /* ^H */
1880 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1882 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1884 Safefree(PL_inplace);
1886 PL_inplace = savepv(SvPV(sv,len));
1888 PL_inplace = Nullch;
1890 case '\017': /* ^O */
1891 if (*(mg->mg_ptr+1) == '\0') {
1893 Safefree(PL_osname);
1895 PL_osname = savepv(SvPV(sv,len));
1899 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1900 if (!PL_compiling.cop_io)
1901 PL_compiling.cop_io = newSVsv(sv);
1903 sv_setsv(PL_compiling.cop_io,sv);
1906 case '\020': /* ^P */
1907 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1908 if (PL_perldb && !PL_DBsingle)
1911 case '\024': /* ^T */
1913 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1915 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1918 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1919 if (*(mg->mg_ptr+1) == '\0') {
1920 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1921 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1922 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1923 | (i ? G_WARN_ON : G_WARN_OFF) ;
1926 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
1927 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1928 if (!SvPOK(sv) && PL_localizing) {
1929 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1930 PL_compiling.cop_warnings = pWARN_NONE;
1935 int accumulate = 0 ;
1936 int any_fatals = 0 ;
1937 char * ptr = (char*)SvPV(sv, len) ;
1938 for (i = 0 ; i < len ; ++i) {
1939 accumulate |= ptr[i] ;
1940 any_fatals |= (ptr[i] & 0xAA) ;
1943 PL_compiling.cop_warnings = pWARN_NONE;
1944 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1945 PL_compiling.cop_warnings = pWARN_ALL;
1946 PL_dowarn |= G_WARN_ONCE ;
1949 if (specialWARN(PL_compiling.cop_warnings))
1950 PL_compiling.cop_warnings = newSVsv(sv) ;
1952 sv_setsv(PL_compiling.cop_warnings, sv);
1953 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1954 PL_dowarn |= G_WARN_ONCE ;
1960 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
1961 PL_widesyscalls = SvTRUE(sv);
1964 if (PL_localizing) {
1965 if (PL_localizing == 1)
1966 SAVESPTR(PL_last_in_gv);
1968 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1969 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
1972 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1973 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1974 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1977 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1978 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1979 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1982 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1985 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1986 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1987 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1990 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1994 IO *io = GvIOp(PL_defoutgv);
1997 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1998 IoFLAGS(io) &= ~IOf_FLUSH;
2000 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2001 PerlIO *ofp = IoOFP(io);
2003 (void)PerlIO_flush(ofp);
2004 IoFLAGS(io) |= IOf_FLUSH;
2010 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2011 PL_multiline = (i != 0);
2014 SvREFCNT_dec(PL_rs);
2015 PL_rs = newSVsv(sv);
2019 SvREFCNT_dec(PL_ors_sv);
2020 if (SvOK(sv) || SvGMAGICAL(sv)) {
2021 PL_ors_sv = newSVsv(sv);
2029 SvREFCNT_dec(PL_ofs_sv);
2030 if (SvOK(sv) || SvGMAGICAL(sv)) {
2031 PL_ofs_sv = newSVsv(sv);
2040 PL_ofmt = savepv(SvPV(sv,len));
2043 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2046 #ifdef COMPLEX_STATUS
2047 if (PL_localizing == 2) {
2048 PL_statusvalue = LvTARGOFF(sv);
2049 PL_statusvalue_vms = LvTARGLEN(sv);
2053 #ifdef VMSISH_STATUS
2055 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2058 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2061 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2062 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
2065 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2066 if (PL_delaymagic) {
2067 PL_delaymagic |= DM_RUID;
2068 break; /* don't do magic till later */
2071 (void)setruid((Uid_t)PL_uid);
2074 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2076 #ifdef HAS_SETRESUID
2077 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2079 if (PL_uid == PL_euid) /* special case $< = $> */
2080 (void)PerlProc_setuid(PL_uid);
2082 PL_uid = PerlProc_getuid();
2083 Perl_croak(aTHX_ "setruid() not implemented");
2088 PL_uid = PerlProc_getuid();
2089 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2092 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2093 if (PL_delaymagic) {
2094 PL_delaymagic |= DM_EUID;
2095 break; /* don't do magic till later */
2098 (void)seteuid((Uid_t)PL_euid);
2101 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2103 #ifdef HAS_SETRESUID
2104 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2106 if (PL_euid == PL_uid) /* special case $> = $< */
2107 PerlProc_setuid(PL_euid);
2109 PL_euid = PerlProc_geteuid();
2110 Perl_croak(aTHX_ "seteuid() not implemented");
2115 PL_euid = PerlProc_geteuid();
2116 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2119 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2120 if (PL_delaymagic) {
2121 PL_delaymagic |= DM_RGID;
2122 break; /* don't do magic till later */
2125 (void)setrgid((Gid_t)PL_gid);
2128 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2130 #ifdef HAS_SETRESGID
2131 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2133 if (PL_gid == PL_egid) /* special case $( = $) */
2134 (void)PerlProc_setgid(PL_gid);
2136 PL_gid = PerlProc_getgid();
2137 Perl_croak(aTHX_ "setrgid() not implemented");
2142 PL_gid = PerlProc_getgid();
2143 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2146 #ifdef HAS_SETGROUPS
2148 char *p = SvPV(sv, len);
2149 Groups_t gary[NGROUPS];
2154 for (i = 0; i < NGROUPS; ++i) {
2155 while (*p && !isSPACE(*p))
2164 (void)setgroups(i, gary);
2166 #else /* HAS_SETGROUPS */
2167 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2168 #endif /* HAS_SETGROUPS */
2169 if (PL_delaymagic) {
2170 PL_delaymagic |= DM_EGID;
2171 break; /* don't do magic till later */
2174 (void)setegid((Gid_t)PL_egid);
2177 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2179 #ifdef HAS_SETRESGID
2180 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2182 if (PL_egid == PL_gid) /* special case $) = $( */
2183 (void)PerlProc_setgid(PL_egid);
2185 PL_egid = PerlProc_getegid();
2186 Perl_croak(aTHX_ "setegid() not implemented");
2191 PL_egid = PerlProc_getegid();
2192 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2195 PL_chopset = SvPV_force(sv,len);
2197 #ifndef MACOS_TRADITIONAL
2199 #ifdef HAS_SETPROCTITLE
2200 /* The BSDs don't show the argv[] in ps(1) output, they
2201 * show a string from the process struct and provide
2202 * the setproctitle() routine to manipulate that. */
2205 # if __FreeBSD_version > 410001
2206 /* The leading "-" removes the "perl: " prefix,
2207 * but not the "(perl) suffix from the ps(1)
2208 * output, because that's what ps(1) shows if the
2209 * argv[] is modified. */
2210 setproctitle("-%s", s);
2211 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2212 /* This doesn't really work if you assume that
2213 * $0 = 'foobar'; will wipe out 'perl' from the $0
2214 * because in ps(1) output the result will be like
2215 * sprintf("perl: %s (perl)", s)
2216 * I guess this is a security feature:
2217 * one (a user process) cannot get rid of the original name.
2219 setproctitle("%s", s);
2226 /* See if all the arguments are contiguous in memory */
2227 for (i = 1; i < PL_origargc; i++) {
2228 if (PL_origargv[i] == s + 1
2230 || PL_origargv[i] == s + 2
2235 s += strlen(s); /* this one is ok too */
2240 /* can grab env area too? */
2241 if (PL_origenviron && (PL_origenviron[0] == s + 1)) {
2242 my_setenv("NoNe SuCh", Nullch);
2243 /* force copy of environment */
2244 for (i = 0; PL_origenviron[i]; i++)
2245 if (PL_origenviron[i] == s + 1) {
2252 PL_origalen = s - PL_origargv[0];
2254 s = SvPV_force(sv,len);
2256 if (i >= PL_origalen) {
2258 /* don't allow system to limit $0 seen by script */
2259 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2260 Copy(s, PL_origargv[0], i, char);
2261 s = PL_origargv[0]+i;
2265 Copy(s, PL_origargv[0], i, char);
2266 s = PL_origargv[0]+i;
2268 while (++i < PL_origalen)
2270 s = PL_origargv[0]+i;
2271 for (i = 1; i < PL_origargc; i++)
2272 PL_origargv[i] = Nullch;
2276 #ifdef USE_5005THREADS
2278 sv_setsv(thr->errsv, sv);
2280 #endif /* USE_5005THREADS */
2285 #ifdef USE_5005THREADS
2287 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2289 DEBUG_S(PerlIO_printf(Perl_debug_log,
2290 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2291 PTR2UV(thr), PTR2UV(sv)));
2293 Perl_croak(aTHX_ "panic: magic_mutexfree");
2294 MUTEX_DESTROY(MgMUTEXP(mg));
2295 COND_DESTROY(MgCONDP(mg));
2298 #endif /* USE_5005THREADS */
2301 Perl_whichsig(pTHX_ char *sig)
2303 register char **sigv;
2305 for (sigv = PL_sig_name+1; *sigv; sigv++)
2306 if (strEQ(sig,*sigv))
2307 return PL_sig_num[sigv - PL_sig_name];
2309 if (strEQ(sig,"CHLD"))
2313 if (strEQ(sig,"CLD"))
2319 #if !defined(PERL_IMPLICIT_CONTEXT)
2324 Perl_sighandler(int sig)
2326 #ifdef PERL_GET_SIG_CONTEXT
2327 dTHXa(PERL_GET_SIG_CONTEXT);
2334 SV *sv = Nullsv, *tSv = PL_Sv;
2340 if (PL_savestack_ix + 15 <= PL_savestack_max)
2342 if (PL_markstack_ptr < PL_markstack_max - 2)
2344 if (PL_retstack_ix < PL_retstack_max - 2)
2346 if (PL_scopestack_ix < PL_scopestack_max - 3)
2349 if (!PL_psig_ptr[sig]) {
2350 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2355 /* Max number of items pushed there is 3*n or 4. We cannot fix
2356 infinity, so we fix 4 (in fact 5): */
2358 PL_savestack_ix += 5; /* Protect save in progress. */
2359 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2362 PL_markstack_ptr++; /* Protect mark. */
2365 PL_retstack[PL_retstack_ix] = NULL;
2368 PL_scopestack_ix += 1;
2369 /* sv_2cv is too complicated, try a simpler variant first: */
2370 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2371 || SvTYPE(cv) != SVt_PVCV)
2372 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2374 if (!cv || !CvROOT(cv)) {
2375 if (ckWARN(WARN_SIGNAL))
2376 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2377 PL_sig_name[sig], (gv ? GvENAME(gv)
2384 if(PL_psig_name[sig]) {
2385 sv = SvREFCNT_inc(PL_psig_name[sig]);
2387 #if !defined(PERL_IMPLICIT_CONTEXT)
2391 sv = sv_newmortal();
2392 sv_setpv(sv,PL_sig_name[sig]);
2395 PUSHSTACKi(PERLSI_SIGNAL);
2400 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2403 if (SvTRUE(ERRSV)) {
2405 #ifdef HAS_SIGPROCMASK
2406 /* Handler "died", for example to get out of a restart-able read().
2407 * Before we re-do that on its behalf re-enable the signal which was
2408 * blocked by the system when we entered.
2412 sigaddset(&set,sig);
2413 sigprocmask(SIG_UNBLOCK, &set, NULL);
2415 /* Not clear if this will work */
2416 (void)rsignal(sig, SIG_IGN);
2417 (void)rsignal(sig, &Perl_csighandler);
2419 #endif /* !PERL_MICRO */
2420 Perl_die(aTHX_ Nullformat);
2424 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2430 PL_scopestack_ix -= 1;
2433 PL_op = myop; /* Apparently not needed... */
2435 PL_Sv = tSv; /* Restore global temporaries. */
2442 restore_magic(pTHX_ void *p)
2444 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2445 SV* sv = mgs->mgs_sv;
2450 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2453 SvFLAGS(sv) |= mgs->mgs_flags;
2457 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2460 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2462 /* If we're still on top of the stack, pop us off. (That condition
2463 * will be satisfied if restore_magic was called explicitly, but *not*
2464 * if it's being called via leave_scope.)
2465 * The reason for doing this is that otherwise, things like sv_2cv()
2466 * may leave alloc gunk on the savestack, and some code
2467 * (e.g. sighandler) doesn't expect that...
2469 if (PL_savestack_ix == mgs->mgs_ss_ix)
2471 I32 popval = SSPOPINT;
2472 assert(popval == SAVEt_DESTRUCTOR_X);
2473 PL_savestack_ix -= 2;
2475 assert(popval == SAVEt_ALLOC);
2477 PL_savestack_ix -= popval;
2483 unwind_handler_stack(pTHX_ void *p)
2485 U32 flags = *(U32*)p;
2488 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2489 /* cxstack_ix-- Not needed, die already unwound it. */
2490 #if !defined(PERL_IMPLICIT_CONTEXT)
2492 SvREFCNT_dec(sig_sv);