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)
33 # include <sys/pstat.h>
36 /* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
37 #if !defined(HAS_SIGACTION) && defined(VMS)
38 # define FAKE_PERSISTENT_SIGNAL_HANDLERS
40 /* if we're doing kill() with sys$sigprc on VMS, FAKE_DEFAULT_SIGNAL_HANDLERS */
41 #if defined(KILL_BY_SIGPRC)
42 # define FAKE_DEFAULT_SIGNAL_HANDLERS
45 static void restore_magic(pTHX_ void *p);
46 static void unwind_handler_stack(pTHX_ void *p);
49 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
57 /* MGS is typedef'ed to struct magic_state in perl.h */
60 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
63 assert(SvMAGICAL(sv));
65 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
67 mgs = SSPTR(mgs_ix, MGS*);
69 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
70 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
74 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
78 =for apidoc mg_magical
80 Turns on the magical status of an SV. See C<sv_magic>.
86 Perl_mg_magical(pTHX_ SV *sv)
89 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
90 MGVTBL* vtbl = mg->mg_virtual;
92 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
96 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
105 Do magic after a value is retrieved from the SV. See C<sv_magic>.
111 Perl_mg_get(pTHX_ SV *sv)
114 MAGIC *newmg, *head, *cur, *mg;
115 I32 mgs_ix = SSNEW(sizeof(MGS));
117 save_magic(mgs_ix, sv);
119 /* We must call svt_get(sv, mg) for each valid entry in the linked
120 list of magic. svt_get() may delete the current entry, add new
121 magic to the head of the list, or upgrade the SV. AMS 20010810 */
123 newmg = cur = head = mg = SvMAGIC(sv);
125 MGVTBL *vtbl = mg->mg_virtual;
127 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
128 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
129 /* Don't restore the flags for this entry if it was deleted. */
130 if (mg->mg_flags & MGf_GSKIP)
131 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
134 mg = mg->mg_moremagic;
137 /* Have we finished with the new entries we saw? Start again
138 where we left off (unless there are more new entries). */
146 /* Were any new entries added? */
147 if (!new && (newmg = SvMAGIC(sv)) != head) {
154 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
161 Do magic after a value is assigned to the SV. See C<sv_magic>.
167 Perl_mg_set(pTHX_ SV *sv)
173 mgs_ix = SSNEW(sizeof(MGS));
174 save_magic(mgs_ix, sv);
176 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
177 MGVTBL* vtbl = mg->mg_virtual;
178 nextmg = mg->mg_moremagic; /* it may delete itself */
179 if (mg->mg_flags & MGf_GSKIP) {
180 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
181 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
183 if (vtbl && vtbl->svt_set)
184 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
187 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
192 =for apidoc mg_length
194 Report on the SV's length. See C<sv_magic>.
200 Perl_mg_length(pTHX_ SV *sv)
205 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
206 MGVTBL* vtbl = mg->mg_virtual;
207 if (vtbl && vtbl->svt_len) {
210 mgs_ix = SSNEW(sizeof(MGS));
211 save_magic(mgs_ix, sv);
212 /* omit MGf_GSKIP -- not changed here */
213 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
214 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
221 U8 *s = (U8*)SvPV(sv, len);
222 len = Perl_utf8_length(aTHX_ s, s + len);
230 Perl_mg_size(pTHX_ SV *sv)
235 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
236 MGVTBL* vtbl = mg->mg_virtual;
237 if (vtbl && vtbl->svt_len) {
240 mgs_ix = SSNEW(sizeof(MGS));
241 save_magic(mgs_ix, sv);
242 /* omit MGf_GSKIP -- not changed here */
243 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
244 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
251 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
256 Perl_croak(aTHX_ "Size magic not implemented");
265 Clear something magical that the SV represents. See C<sv_magic>.
271 Perl_mg_clear(pTHX_ SV *sv)
276 mgs_ix = SSNEW(sizeof(MGS));
277 save_magic(mgs_ix, sv);
279 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
280 MGVTBL* vtbl = mg->mg_virtual;
281 /* omit GSKIP -- never set here */
283 if (vtbl && vtbl->svt_clear)
284 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
287 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
294 Finds the magic pointer for type matching the SV. See C<sv_magic>.
300 Perl_mg_find(pTHX_ SV *sv, int type)
305 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
306 if (mg->mg_type == type)
315 Copies the magic from one SV to another. See C<sv_magic>.
321 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
325 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
326 MGVTBL* vtbl = mg->mg_virtual;
327 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
328 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
330 else if (isUPPER(mg->mg_type)) {
332 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
333 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
335 toLOWER(mg->mg_type), key, klen);
345 Free any magic storage used by the SV. See C<sv_magic>.
351 Perl_mg_free(pTHX_ SV *sv)
355 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
356 MGVTBL* vtbl = mg->mg_virtual;
357 moremagic = mg->mg_moremagic;
358 if (vtbl && vtbl->svt_free)
359 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
360 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
362 Safefree(mg->mg_ptr);
363 else if (mg->mg_len == HEf_SVKEY)
364 SvREFCNT_dec((SV*)mg->mg_ptr);
366 if (mg->mg_flags & MGf_REFCOUNTED)
367 SvREFCNT_dec(mg->mg_obj);
375 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
380 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
384 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
385 if (mg->mg_obj) /* @+ */
388 return rx->lastparen;
395 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
403 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
407 if (paren <= (I32)rx->nparens &&
408 (s = rx->startp[paren]) != -1 &&
409 (t = rx->endp[paren]) != -1)
411 if (mg->mg_obj) /* @+ */
416 if (i > 0 && RX_MATCH_UTF8(rx)) {
417 char *b = rx->subbeg;
419 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
429 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
431 Perl_croak(aTHX_ PL_no_modify);
437 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
444 switch (*mg->mg_ptr) {
445 case '1': case '2': case '3': case '4':
446 case '5': case '6': case '7': case '8': case '9': case '&':
447 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
449 paren = atoi(mg->mg_ptr); /* $& is in [0] */
451 if (paren <= (I32)rx->nparens &&
452 (s1 = rx->startp[paren]) != -1 &&
453 (t1 = rx->endp[paren]) != -1)
457 if (i > 0 && RX_MATCH_UTF8(rx)) {
458 char *s = rx->subbeg + s1;
459 char *send = rx->subbeg + t1;
462 if (is_utf8_string((U8*)s, i))
463 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
466 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
470 if (ckWARN(WARN_UNINITIALIZED))
475 if (ckWARN(WARN_UNINITIALIZED))
480 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
481 paren = rx->lastparen;
486 case '\016': /* ^N */
487 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
488 paren = rx->lastcloseparen;
494 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
495 if (rx->startp[0] != -1) {
506 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
507 if (rx->endp[0] != -1) {
508 i = rx->sublen - rx->endp[0];
519 if (!SvPOK(sv) && SvNIOK(sv)) {
529 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
536 switch (*mg->mg_ptr) {
537 case '\001': /* ^A */
538 sv_setsv(sv, PL_bodytarget);
540 case '\003': /* ^C */
541 sv_setiv(sv, (IV)PL_minus_c);
544 case '\004': /* ^D */
545 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
546 #if defined(YYDEBUG) && defined(DEBUGGING)
547 PL_yydebug = DEBUG_p_TEST;
550 case '\005': /* ^E */
551 if (*(mg->mg_ptr+1) == '\0') {
552 #ifdef MACOS_TRADITIONAL
556 sv_setnv(sv,(double)gMacPerl_OSErr);
557 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
562 # include <descrip.h>
563 # include <starlet.h>
565 $DESCRIPTOR(msgdsc,msg);
566 sv_setnv(sv,(NV) vaxc$errno);
567 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
568 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
574 if (!(_emx_env & 0x200)) { /* Under DOS */
575 sv_setnv(sv, (NV)errno);
576 sv_setpv(sv, errno ? Strerror(errno) : "");
578 if (errno != errno_isOS2) {
579 int tmp = _syserrno();
580 if (tmp) /* 2nd call to _syserrno() makes it 0 */
583 sv_setnv(sv, (NV)Perl_rc);
584 sv_setpv(sv, os2error(Perl_rc));
589 DWORD dwErr = GetLastError();
590 sv_setnv(sv, (NV)dwErr);
593 PerlProc_GetOSError(sv, dwErr);
600 sv_setnv(sv, (NV)errno);
601 sv_setpv(sv, errno ? Strerror(errno) : "");
606 SvNOK_on(sv); /* what a wonderful hack! */
608 else if (strEQ(mg->mg_ptr+1, "NCODING"))
609 sv_setsv(sv, PL_encoding);
611 case '\006': /* ^F */
612 sv_setiv(sv, (IV)PL_maxsysfd);
614 case '\010': /* ^H */
615 sv_setiv(sv, (IV)PL_hints);
617 case '\011': /* ^I */ /* NOT \t in EBCDIC */
619 sv_setpv(sv, PL_inplace);
621 sv_setsv(sv, &PL_sv_undef);
623 case '\017': /* ^O & ^OPEN */
624 if (*(mg->mg_ptr+1) == '\0')
625 sv_setpv(sv, PL_osname);
626 else if (strEQ(mg->mg_ptr, "\017PEN")) {
627 if (!PL_compiling.cop_io)
628 sv_setsv(sv, &PL_sv_undef);
630 sv_setsv(sv, PL_compiling.cop_io);
634 case '\020': /* ^P */
635 sv_setiv(sv, (IV)PL_perldb);
637 case '\023': /* ^S */
639 if (PL_lex_state != LEX_NOTPARSING)
642 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
647 case '\024': /* ^T */
648 if (*(mg->mg_ptr+1) == '\0') {
650 sv_setnv(sv, PL_basetime);
652 sv_setiv(sv, (IV)PL_basetime);
655 else if (strEQ(mg->mg_ptr, "\024AINT"))
656 sv_setiv(sv, PL_tainting
657 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
660 case '\025': /* $^UTF8_LOCALE */
661 if (strEQ(mg->mg_ptr, "\025TF8_LOCALE"))
662 sv_setiv(sv, (IV) (PL_wantutf8 && PL_utf8locale));
664 case '\027': /* ^W & $^WARNING_BITS */
665 if (*(mg->mg_ptr+1) == '\0')
666 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
667 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
668 if (PL_compiling.cop_warnings == pWARN_NONE ||
669 PL_compiling.cop_warnings == pWARN_STD)
671 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
673 else if (PL_compiling.cop_warnings == pWARN_ALL) {
674 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
677 sv_setsv(sv, PL_compiling.cop_warnings);
682 case '1': case '2': case '3': case '4':
683 case '5': case '6': case '7': case '8': case '9': case '&':
684 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
688 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
689 * XXX Does the new way break anything?
691 paren = atoi(mg->mg_ptr); /* $& is in [0] */
693 if (paren <= (I32)rx->nparens &&
694 (s1 = rx->startp[paren]) != -1 &&
695 (t1 = rx->endp[paren]) != -1)
705 if (RX_MATCH_UTF8(rx) && is_utf8_string((U8*)s, i))
710 if (RX_MATCH_TAINTED(rx)) {
711 MAGIC* mg = SvMAGIC(sv);
714 SvMAGIC(sv) = mg->mg_moremagic;
716 if ((mgt = SvMAGIC(sv))) {
717 mg->mg_moremagic = mgt;
727 sv_setsv(sv,&PL_sv_undef);
730 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
731 paren = rx->lastparen;
735 sv_setsv(sv,&PL_sv_undef);
737 case '\016': /* ^N */
738 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
739 paren = rx->lastcloseparen;
743 sv_setsv(sv,&PL_sv_undef);
746 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
747 if ((s = rx->subbeg) && rx->startp[0] != -1) {
752 sv_setsv(sv,&PL_sv_undef);
755 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
756 if (rx->subbeg && rx->endp[0] != -1) {
757 s = rx->subbeg + rx->endp[0];
758 i = rx->sublen - rx->endp[0];
762 sv_setsv(sv,&PL_sv_undef);
766 if (GvIO(PL_last_in_gv)) {
767 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
773 sv_setiv(sv, (IV)STATUS_CURRENT);
774 #ifdef COMPLEX_STATUS
775 LvTARGOFF(sv) = PL_statusvalue;
776 LvTARGLEN(sv) = PL_statusvalue_vms;
781 s = IoTOP_NAME(GvIOp(PL_defoutgv));
785 sv_setpv(sv,GvENAME(PL_defoutgv));
790 s = IoFMT_NAME(GvIOp(PL_defoutgv));
792 s = GvENAME(PL_defoutgv);
797 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
800 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
803 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
811 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
814 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
820 sv_copypv(sv, PL_ors_sv);
823 sv_setpv(sv,PL_ofmt);
827 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
828 sv_setpv(sv, errno ? Strerror(errno) : "");
831 int saveerrno = errno;
832 sv_setnv(sv, (NV)errno);
834 if (errno == errno_isOS2 || errno == errno_isOS2_set)
835 sv_setpv(sv, os2error(Perl_rc));
838 sv_setpv(sv, errno ? Strerror(errno) : "");
842 SvNOK_on(sv); /* what a wonderful hack! */
845 sv_setiv(sv, (IV)PL_uid);
848 sv_setiv(sv, (IV)PL_euid);
851 sv_setiv(sv, (IV)PL_gid);
853 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
857 sv_setiv(sv, (IV)PL_egid);
859 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
864 Groups_t gary[NGROUPS];
865 i = getgroups(NGROUPS,gary);
867 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
870 (void)SvIOK_on(sv); /* what a wonderful hack! */
874 #ifndef MACOS_TRADITIONAL
878 #ifdef USE_5005THREADS
880 sv_setsv(sv, thr->errsv);
882 #endif /* USE_5005THREADS */
888 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
890 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
892 if (uf && uf->uf_val)
893 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
898 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
908 #ifdef DYNAMIC_ENV_FETCH
909 /* We just undefd an environment var. Is a replacement */
910 /* waiting in the wings? */
913 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
914 s = SvPV(*valp, len);
918 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
919 /* And you'll never guess what the dog had */
920 /* in its mouth... */
922 MgTAINTEDDIR_off(mg);
924 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
925 char pathbuf[256], eltbuf[256], *cp, *elt = s;
929 do { /* DCL$PATH may be a search list */
930 while (1) { /* as may dev portion of any element */
931 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
932 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
933 cando_by_name(S_IWUSR,0,elt) ) {
938 if ((cp = strchr(elt, ':')) != Nullch)
940 if (my_trnlnm(elt, eltbuf, j++))
946 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
949 if (s && klen == 4 && strEQ(ptr,"PATH")) {
950 char *strend = s + len;
956 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
959 if (i >= sizeof tmpbuf /* too long -- assume the worst */
961 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
968 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
974 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
977 my_setenv(MgPV(mg,n_a),Nullch);
982 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
985 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
990 magic_clear_all_env(sv,mg);
991 hv_iterinit((HV*)sv);
992 while ((entry = hv_iternext((HV*)sv))) {
994 my_setenv(hv_iterkey(entry, &keylen),
995 SvPV(hv_iterval((HV*)sv, entry), n_a));
1003 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1005 #if defined(VMS) || defined(EPOC)
1006 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1008 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1011 # ifdef USE_ENVIRON_ARRAY
1012 # if defined(USE_ITHREADS)
1013 /* only the parent thread can clobber the process environment */
1014 if (PL_curinterp == aTHX)
1017 # ifndef PERL_USE_SAFE_PUTENV
1020 if (environ == PL_origenviron)
1021 environ = (char**)safesysmalloc(sizeof(char*));
1023 for (i = 0; environ[i]; i++)
1024 safesysfree(environ[i]);
1025 # endif /* PERL_USE_SAFE_PUTENV */
1027 environ[0] = Nullch;
1029 # endif /* USE_ENVIRON_ARRAY */
1030 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1031 #endif /* VMS || EPC */
1035 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1036 static int sig_handlers_initted = 0;
1038 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1039 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1041 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1042 static int sig_defaulting[SIG_SIZE];
1047 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1051 /* Are we fetching a signal entry? */
1052 i = whichsig(MgPV(mg,n_a));
1055 sv_setsv(sv,PL_psig_ptr[i]);
1057 Sighandler_t sigstate;
1058 sigstate = rsignal_state(i);
1059 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1060 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1062 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1063 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1065 /* cache state so we don't fetch it again */
1066 if(sigstate == SIG_IGN)
1067 sv_setpv(sv,"IGNORE");
1069 sv_setsv(sv,&PL_sv_undef);
1070 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1077 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1081 /* Are we clearing a signal entry? */
1082 i = whichsig(MgPV(mg,n_a));
1084 if(PL_psig_ptr[i]) {
1085 SvREFCNT_dec(PL_psig_ptr[i]);
1088 if(PL_psig_name[i]) {
1089 SvREFCNT_dec(PL_psig_name[i]);
1097 Perl_raise_signal(pTHX_ int sig)
1099 /* Set a flag to say this signal is pending */
1100 PL_psig_pend[sig]++;
1101 /* And one to say _a_ signal is pending */
1106 Perl_csighandler(int sig)
1108 #ifdef PERL_GET_SIG_CONTEXT
1109 dTHXa(PERL_GET_SIG_CONTEXT);
1113 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1114 (void) rsignal(sig, &Perl_csighandler);
1115 if (sig_ignoring[sig]) return;
1117 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1118 if (sig_defaulting[sig])
1119 #ifdef KILL_BY_SIGPRC
1120 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1126 #ifdef PERL_OLD_SIGNALS
1127 /* Call the perl level handler now with risk we may be in malloc() etc. */
1128 (*PL_sighandlerp)(sig);
1130 Perl_raise_signal(aTHX_ sig);
1134 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1136 Perl_csighandler_init(void)
1139 if (sig_handlers_initted) return;
1141 for (sig = 1; sig < SIG_SIZE; sig++) {
1142 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1144 sig_defaulting[sig] = 1;
1145 (void) rsignal(sig, &Perl_csighandler);
1147 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1148 sig_ignoring[sig] = 0;
1151 sig_handlers_initted = 1;
1156 Perl_despatch_signals(pTHX)
1160 for (sig = 1; sig < SIG_SIZE; sig++) {
1161 if (PL_psig_pend[sig]) {
1162 PL_psig_pend[sig] = 0;
1163 (*PL_sighandlerp)(sig);
1169 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1178 if (strEQ(s,"__DIE__"))
1180 else if (strEQ(s,"__WARN__"))
1183 Perl_croak(aTHX_ "No such hook: %s", s);
1191 i = whichsig(s); /* ...no, a brick */
1193 if (ckWARN(WARN_SIGNAL))
1194 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1197 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1198 if (!sig_handlers_initted) Perl_csighandler_init();
1200 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1201 sig_ignoring[i] = 0;
1203 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1204 sig_defaulting[i] = 0;
1206 SvREFCNT_dec(PL_psig_name[i]);
1207 SvREFCNT_dec(PL_psig_ptr[i]);
1208 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1209 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1210 PL_psig_name[i] = newSVpvn(s, len);
1211 SvREADONLY_on(PL_psig_name[i]);
1213 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1215 (void)rsignal(i, &Perl_csighandler);
1217 *svp = SvREFCNT_inc(sv);
1220 s = SvPV_force(sv,len);
1221 if (strEQ(s,"IGNORE")) {
1223 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1224 sig_ignoring[i] = 1;
1225 (void)rsignal(i, &Perl_csighandler);
1227 (void)rsignal(i, SIG_IGN);
1232 else if (strEQ(s,"DEFAULT") || !*s) {
1234 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1236 sig_defaulting[i] = 1;
1237 (void)rsignal(i, &Perl_csighandler);
1240 (void)rsignal(i, SIG_DFL);
1247 * We should warn if HINT_STRICT_REFS, but without
1248 * access to a known hint bit in a known OP, we can't
1249 * tell whether HINT_STRICT_REFS is in force or not.
1251 if (!strchr(s,':') && !strchr(s,'\''))
1252 sv_insert(sv, 0, 0, "main::", 6);
1254 (void)rsignal(i, &Perl_csighandler);
1256 *svp = SvREFCNT_inc(sv);
1260 #endif /* !PERL_MICRO */
1263 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1265 PL_sub_generation++;
1270 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1272 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1273 PL_amagic_generation++;
1279 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1281 HV *hv = (HV*)LvTARG(sv);
1285 (void) hv_iterinit(hv);
1286 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1289 while (hv_iternext(hv))
1294 sv_setiv(sv, (IV)i);
1299 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1302 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1307 /* caller is responsible for stack switching/cleanup */
1309 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1315 PUSHs(SvTIED_obj(sv, mg));
1318 if (mg->mg_len >= 0)
1319 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1320 else if (mg->mg_len == HEf_SVKEY)
1321 PUSHs((SV*)mg->mg_ptr);
1323 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1324 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1332 return call_method(meth, flags);
1336 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1342 PUSHSTACKi(PERLSI_MAGIC);
1344 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1345 sv_setsv(sv, *PL_stack_sp--);
1355 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1357 magic_methpack(sv,mg,"FETCH");
1359 mg->mg_flags |= MGf_GSKIP;
1364 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1368 PUSHSTACKi(PERLSI_MAGIC);
1369 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1376 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1378 return magic_methpack(sv,mg,"DELETE");
1383 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1390 PUSHSTACKi(PERLSI_MAGIC);
1391 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1392 sv = *PL_stack_sp--;
1393 retval = (U32) SvIV(sv)-1;
1402 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1407 PUSHSTACKi(PERLSI_MAGIC);
1409 XPUSHs(SvTIED_obj(sv, mg));
1411 call_method("CLEAR", G_SCALAR|G_DISCARD);
1418 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1421 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1425 PUSHSTACKi(PERLSI_MAGIC);
1428 PUSHs(SvTIED_obj(sv, mg));
1433 if (call_method(meth, G_SCALAR))
1434 sv_setsv(key, *PL_stack_sp--);
1443 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1445 return magic_methpack(sv,mg,"EXISTS");
1449 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1459 svp = av_fetch(GvAV(gv),
1460 atoi(MgPV(mg,n_a)), FALSE);
1461 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp)))) {
1462 /* set or clear breakpoint in the relevant control op */
1464 o->op_flags |= OPf_SPECIAL;
1466 o->op_flags &= ~OPf_SPECIAL;
1472 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1474 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1479 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1481 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1486 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1488 SV* lsv = LvTARG(sv);
1490 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1491 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1492 if (mg && mg->mg_len >= 0) {
1495 sv_pos_b2u(lsv, &i);
1496 sv_setiv(sv, i + PL_curcop->cop_arybase);
1505 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1507 SV* lsv = LvTARG(sv);
1514 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1515 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1519 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1520 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1522 else if (!SvOK(sv)) {
1526 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1528 pos = SvIV(sv) - PL_curcop->cop_arybase;
1531 ulen = sv_len_utf8(lsv);
1541 else if (pos > (SSize_t)len)
1546 sv_pos_u2b(lsv, &p, 0);
1551 mg->mg_flags &= ~MGf_MINMATCH;
1557 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1559 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1561 gv_efullname3(sv,((GV*)sv), "*");
1565 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1570 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1579 if (*s == '*' && s[1])
1581 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1586 GvGP(sv) = gp_ref(GvGP(gv));
1591 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1594 SV *lsv = LvTARG(sv);
1595 char *tmps = SvPV(lsv,len);
1596 I32 offs = LvTARGOFF(sv);
1597 I32 rem = LvTARGLEN(sv);
1600 sv_pos_u2b(lsv, &offs, &rem);
1601 if (offs > (I32)len)
1603 if (rem + offs > (I32)len)
1605 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1612 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1615 char *tmps = SvPV(sv, len);
1616 SV *lsv = LvTARG(sv);
1617 I32 lvoff = LvTARGOFF(sv);
1618 I32 lvlen = LvTARGLEN(sv);
1621 sv_utf8_upgrade(lsv);
1622 sv_pos_u2b(lsv, &lvoff, &lvlen);
1623 sv_insert(lsv, lvoff, lvlen, tmps, len);
1626 else if (lsv && SvUTF8(lsv)) {
1627 sv_pos_u2b(lsv, &lvoff, &lvlen);
1628 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1629 sv_insert(lsv, lvoff, lvlen, tmps, len);
1633 sv_insert(lsv, lvoff, lvlen, tmps, len);
1639 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1641 TAINT_IF((mg->mg_len & 1) ||
1642 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1647 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1649 if (PL_localizing) {
1650 if (PL_localizing == 1)
1655 else if (PL_tainted)
1663 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1665 SV *lsv = LvTARG(sv);
1672 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1677 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1679 do_vecset(sv); /* XXX slurp this routine */
1684 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1687 if (LvTARGLEN(sv)) {
1689 SV *ahv = LvTARG(sv);
1690 if (SvTYPE(ahv) == SVt_PVHV) {
1691 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1696 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1702 AV* av = (AV*)LvTARG(sv);
1703 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1704 targ = AvARRAY(av)[LvTARGOFF(sv)];
1706 if (targ && targ != &PL_sv_undef) {
1707 /* somebody else defined it for us */
1708 SvREFCNT_dec(LvTARG(sv));
1709 LvTARG(sv) = SvREFCNT_inc(targ);
1711 SvREFCNT_dec(mg->mg_obj);
1712 mg->mg_obj = Nullsv;
1713 mg->mg_flags &= ~MGf_REFCOUNTED;
1718 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1723 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1728 sv_setsv(LvTARG(sv), sv);
1729 SvSETMAGIC(LvTARG(sv));
1735 Perl_vivify_defelem(pTHX_ SV *sv)
1740 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1743 SV *ahv = LvTARG(sv);
1745 if (SvTYPE(ahv) == SVt_PVHV) {
1746 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1751 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1755 if (!value || value == &PL_sv_undef)
1756 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1759 AV* av = (AV*)LvTARG(sv);
1760 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1761 LvTARG(sv) = Nullsv; /* array can't be extended */
1763 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1764 if (!svp || (value = *svp) == &PL_sv_undef)
1765 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1768 (void)SvREFCNT_inc(value);
1769 SvREFCNT_dec(LvTARG(sv));
1772 SvREFCNT_dec(mg->mg_obj);
1773 mg->mg_obj = Nullsv;
1774 mg->mg_flags &= ~MGf_REFCOUNTED;
1778 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1780 AV *av = (AV*)mg->mg_obj;
1781 SV **svp = AvARRAY(av);
1782 I32 i = AvFILLp(av);
1784 if (svp[i] && svp[i] != &PL_sv_undef) {
1785 if (!SvWEAKREF(svp[i]))
1786 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1787 /* XXX Should we check that it hasn't changed? */
1789 (void)SvOK_off(svp[i]);
1790 SvWEAKREF_off(svp[i]);
1791 svp[i] = &PL_sv_undef;
1799 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1807 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1809 sv_unmagic(sv, PERL_MAGIC_bm);
1815 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1817 sv_unmagic(sv, PERL_MAGIC_fm);
1823 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1825 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1827 if (uf && uf->uf_set)
1828 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1833 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1835 regexp *re = (regexp *)mg->mg_obj;
1840 #ifdef USE_LOCALE_COLLATE
1842 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1845 * RenE<eacute> Descartes said "I think not."
1846 * and vanished with a faint plop.
1849 Safefree(mg->mg_ptr);
1855 #endif /* USE_LOCALE_COLLATE */
1857 /* Just clear the UTF-8 cache data. */
1859 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
1861 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
1863 mg->mg_len = -1; /* The mg_len holds the len cache. */
1868 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1873 switch (*mg->mg_ptr) {
1874 case '\001': /* ^A */
1875 sv_setsv(PL_bodytarget, sv);
1877 case '\003': /* ^C */
1878 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1881 case '\004': /* ^D */
1882 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1883 DEBUG_x(dump_all());
1885 case '\005': /* ^E */
1886 if (*(mg->mg_ptr+1) == '\0') {
1887 #ifdef MACOS_TRADITIONAL
1888 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1891 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1894 SetLastError( SvIV(sv) );
1897 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1899 /* will anyone ever use this? */
1900 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1906 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
1908 SvREFCNT_dec(PL_encoding);
1909 if (SvOK(sv) || SvGMAGICAL(sv)) {
1910 PL_encoding = newSVsv(sv);
1913 PL_encoding = Nullsv;
1917 case '\006': /* ^F */
1918 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1920 case '\010': /* ^H */
1921 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1923 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1925 Safefree(PL_inplace);
1927 PL_inplace = savepv(SvPV(sv,len));
1929 PL_inplace = Nullch;
1931 case '\017': /* ^O */
1932 if (*(mg->mg_ptr+1) == '\0') {
1934 Safefree(PL_osname);
1936 PL_osname = savepv(SvPV(sv,len));
1940 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1941 if (!PL_compiling.cop_io)
1942 PL_compiling.cop_io = newSVsv(sv);
1944 sv_setsv(PL_compiling.cop_io,sv);
1947 case '\020': /* ^P */
1948 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1949 if (PL_perldb && !PL_DBsingle)
1952 case '\024': /* ^T */
1954 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1956 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1959 case '\025': /* $^UTF8_LOCALE */
1960 if (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1961 PL_wantutf8 = PL_utf8locale;
1963 PL_wantutf8 = FALSE;
1965 case '\027': /* ^W & $^WARNING_BITS */
1966 if (*(mg->mg_ptr+1) == '\0') {
1967 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1968 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1969 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1970 | (i ? G_WARN_ON : G_WARN_OFF) ;
1973 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
1974 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1975 if (!SvPOK(sv) && PL_localizing) {
1976 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1977 PL_compiling.cop_warnings = pWARN_NONE;
1982 int accumulate = 0 ;
1983 int any_fatals = 0 ;
1984 char * ptr = (char*)SvPV(sv, len) ;
1985 for (i = 0 ; i < len ; ++i) {
1986 accumulate |= ptr[i] ;
1987 any_fatals |= (ptr[i] & 0xAA) ;
1990 PL_compiling.cop_warnings = pWARN_NONE;
1991 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1992 PL_compiling.cop_warnings = pWARN_ALL;
1993 PL_dowarn |= G_WARN_ONCE ;
1996 if (specialWARN(PL_compiling.cop_warnings))
1997 PL_compiling.cop_warnings = newSVsv(sv) ;
1999 sv_setsv(PL_compiling.cop_warnings, sv);
2000 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2001 PL_dowarn |= G_WARN_ONCE ;
2009 if (PL_localizing) {
2010 if (PL_localizing == 1)
2011 SAVESPTR(PL_last_in_gv);
2013 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2014 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2017 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2018 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
2019 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
2022 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2023 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
2024 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
2027 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2030 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2031 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2032 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2035 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2039 IO *io = GvIOp(PL_defoutgv);
2042 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2043 IoFLAGS(io) &= ~IOf_FLUSH;
2045 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2046 PerlIO *ofp = IoOFP(io);
2048 (void)PerlIO_flush(ofp);
2049 IoFLAGS(io) |= IOf_FLUSH;
2055 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2056 PL_multiline = (i != 0);
2059 SvREFCNT_dec(PL_rs);
2060 PL_rs = newSVsv(sv);
2064 SvREFCNT_dec(PL_ors_sv);
2065 if (SvOK(sv) || SvGMAGICAL(sv)) {
2066 PL_ors_sv = newSVsv(sv);
2074 SvREFCNT_dec(PL_ofs_sv);
2075 if (SvOK(sv) || SvGMAGICAL(sv)) {
2076 PL_ofs_sv = newSVsv(sv);
2085 PL_ofmt = savepv(SvPV(sv,len));
2088 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2091 #ifdef COMPLEX_STATUS
2092 if (PL_localizing == 2) {
2093 PL_statusvalue = LvTARGOFF(sv);
2094 PL_statusvalue_vms = LvTARGLEN(sv);
2098 #ifdef VMSISH_STATUS
2100 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2103 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2108 # define PERL_VMS_BANG vaxc$errno
2110 # define PERL_VMS_BANG 0
2112 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2113 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2117 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2118 if (PL_delaymagic) {
2119 PL_delaymagic |= DM_RUID;
2120 break; /* don't do magic till later */
2123 (void)setruid((Uid_t)PL_uid);
2126 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2128 #ifdef HAS_SETRESUID
2129 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2131 if (PL_uid == PL_euid) /* special case $< = $> */
2132 (void)PerlProc_setuid(PL_uid);
2134 PL_uid = PerlProc_getuid();
2135 Perl_croak(aTHX_ "setruid() not implemented");
2140 PL_uid = PerlProc_getuid();
2141 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2144 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2145 if (PL_delaymagic) {
2146 PL_delaymagic |= DM_EUID;
2147 break; /* don't do magic till later */
2150 (void)seteuid((Uid_t)PL_euid);
2153 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2155 #ifdef HAS_SETRESUID
2156 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2158 if (PL_euid == PL_uid) /* special case $> = $< */
2159 PerlProc_setuid(PL_euid);
2161 PL_euid = PerlProc_geteuid();
2162 Perl_croak(aTHX_ "seteuid() not implemented");
2167 PL_euid = PerlProc_geteuid();
2168 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2171 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2172 if (PL_delaymagic) {
2173 PL_delaymagic |= DM_RGID;
2174 break; /* don't do magic till later */
2177 (void)setrgid((Gid_t)PL_gid);
2180 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2182 #ifdef HAS_SETRESGID
2183 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2185 if (PL_gid == PL_egid) /* special case $( = $) */
2186 (void)PerlProc_setgid(PL_gid);
2188 PL_gid = PerlProc_getgid();
2189 Perl_croak(aTHX_ "setrgid() not implemented");
2194 PL_gid = PerlProc_getgid();
2195 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2198 #ifdef HAS_SETGROUPS
2200 char *p = SvPV(sv, len);
2201 Groups_t gary[NGROUPS];
2206 for (i = 0; i < NGROUPS; ++i) {
2207 while (*p && !isSPACE(*p))
2216 (void)setgroups(i, gary);
2218 #else /* HAS_SETGROUPS */
2219 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2220 #endif /* HAS_SETGROUPS */
2221 if (PL_delaymagic) {
2222 PL_delaymagic |= DM_EGID;
2223 break; /* don't do magic till later */
2226 (void)setegid((Gid_t)PL_egid);
2229 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2231 #ifdef HAS_SETRESGID
2232 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2234 if (PL_egid == PL_gid) /* special case $) = $( */
2235 (void)PerlProc_setgid(PL_egid);
2237 PL_egid = PerlProc_getegid();
2238 Perl_croak(aTHX_ "setegid() not implemented");
2243 PL_egid = PerlProc_getegid();
2244 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2247 PL_chopset = SvPV_force(sv,len);
2249 #ifndef MACOS_TRADITIONAL
2251 LOCK_DOLLARZERO_MUTEX;
2252 #ifdef HAS_SETPROCTITLE
2253 /* The BSDs don't show the argv[] in ps(1) output, they
2254 * show a string from the process struct and provide
2255 * the setproctitle() routine to manipulate that. */
2258 # if __FreeBSD_version > 410001
2259 /* The leading "-" removes the "perl: " prefix,
2260 * but not the "(perl) suffix from the ps(1)
2261 * output, because that's what ps(1) shows if the
2262 * argv[] is modified. */
2263 setproctitle("-%s", s);
2264 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2265 /* This doesn't really work if you assume that
2266 * $0 = 'foobar'; will wipe out 'perl' from the $0
2267 * because in ps(1) output the result will be like
2268 * sprintf("perl: %s (perl)", s)
2269 * I guess this is a security feature:
2270 * one (a user process) cannot get rid of the original name.
2272 setproctitle("%s", s);
2276 #if defined(__hpux) && defined(PSTAT_SETCMD)
2281 pstat(PSTAT_SETCMD, un, len, 0, 0);
2287 /* See if all the arguments are contiguous in memory */
2288 for (i = 1; i < PL_origargc; i++) {
2289 if (PL_origargv[i] == s + 1
2291 || PL_origargv[i] == s + 2
2296 s += strlen(s); /* this one is ok too */
2301 /* can grab env area too? */
2304 && PL_curinterp == aTHX
2306 && (PL_origenviron[0] == s + 1))
2308 my_setenv("NoNe SuCh", Nullch);
2309 /* force copy of environment */
2310 for (i = 0; PL_origenviron[i]; i++)
2311 if (PL_origenviron[i] == s + 1) {
2318 PL_origalen = s - PL_origargv[0];
2320 s = SvPV_force(sv,len);
2322 if (i >= (I32)PL_origalen) {
2324 /* don't allow system to limit $0 seen by script */
2325 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2326 Copy(s, PL_origargv[0], i, char);
2327 s = PL_origargv[0]+i;
2331 Copy(s, PL_origargv[0], i, char);
2332 s = PL_origargv[0]+i;
2334 while (++i < (I32)PL_origalen)
2336 for (i = 1; i < PL_origargc; i++)
2337 PL_origargv[i] = Nullch;
2339 UNLOCK_DOLLARZERO_MUTEX;
2342 #ifdef USE_5005THREADS
2344 sv_setsv(thr->errsv, sv);
2346 #endif /* USE_5005THREADS */
2351 #ifdef USE_5005THREADS
2353 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2355 DEBUG_S(PerlIO_printf(Perl_debug_log,
2356 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2357 PTR2UV(thr), PTR2UV(sv)));
2359 Perl_croak(aTHX_ "panic: magic_mutexfree");
2360 MUTEX_DESTROY(MgMUTEXP(mg));
2361 COND_DESTROY(MgCONDP(mg));
2364 #endif /* USE_5005THREADS */
2367 Perl_whichsig(pTHX_ char *sig)
2369 register char **sigv;
2371 for (sigv = PL_sig_name+1; *sigv; sigv++)
2372 if (strEQ(sig,*sigv))
2373 return PL_sig_num[sigv - PL_sig_name];
2375 if (strEQ(sig,"CHLD"))
2379 if (strEQ(sig,"CLD"))
2385 #if !defined(PERL_IMPLICIT_CONTEXT)
2390 Perl_sighandler(int sig)
2392 #ifdef PERL_GET_SIG_CONTEXT
2393 dTHXa(PERL_GET_SIG_CONTEXT);
2400 SV *sv = Nullsv, *tSv = PL_Sv;
2406 if (PL_savestack_ix + 15 <= PL_savestack_max)
2408 if (PL_markstack_ptr < PL_markstack_max - 2)
2410 if (PL_retstack_ix < PL_retstack_max - 2)
2412 if (PL_scopestack_ix < PL_scopestack_max - 3)
2415 if (!PL_psig_ptr[sig]) {
2416 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2421 /* Max number of items pushed there is 3*n or 4. We cannot fix
2422 infinity, so we fix 4 (in fact 5): */
2424 PL_savestack_ix += 5; /* Protect save in progress. */
2425 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2428 PL_markstack_ptr++; /* Protect mark. */
2431 PL_retstack[PL_retstack_ix] = NULL;
2434 PL_scopestack_ix += 1;
2435 /* sv_2cv is too complicated, try a simpler variant first: */
2436 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2437 || SvTYPE(cv) != SVt_PVCV)
2438 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2440 if (!cv || !CvROOT(cv)) {
2441 if (ckWARN(WARN_SIGNAL))
2442 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2443 PL_sig_name[sig], (gv ? GvENAME(gv)
2450 if(PL_psig_name[sig]) {
2451 sv = SvREFCNT_inc(PL_psig_name[sig]);
2453 #if !defined(PERL_IMPLICIT_CONTEXT)
2457 sv = sv_newmortal();
2458 sv_setpv(sv,PL_sig_name[sig]);
2461 PUSHSTACKi(PERLSI_SIGNAL);
2466 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2469 if (SvTRUE(ERRSV)) {
2471 #ifdef HAS_SIGPROCMASK
2472 /* Handler "died", for example to get out of a restart-able read().
2473 * Before we re-do that on its behalf re-enable the signal which was
2474 * blocked by the system when we entered.
2478 sigaddset(&set,sig);
2479 sigprocmask(SIG_UNBLOCK, &set, NULL);
2481 /* Not clear if this will work */
2482 (void)rsignal(sig, SIG_IGN);
2483 (void)rsignal(sig, &Perl_csighandler);
2485 #endif /* !PERL_MICRO */
2486 Perl_die(aTHX_ Nullformat);
2490 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2496 PL_scopestack_ix -= 1;
2499 PL_op = myop; /* Apparently not needed... */
2501 PL_Sv = tSv; /* Restore global temporaries. */
2508 restore_magic(pTHX_ void *p)
2510 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2511 SV* sv = mgs->mgs_sv;
2516 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2519 SvFLAGS(sv) |= mgs->mgs_flags;
2523 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2526 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2528 /* If we're still on top of the stack, pop us off. (That condition
2529 * will be satisfied if restore_magic was called explicitly, but *not*
2530 * if it's being called via leave_scope.)
2531 * The reason for doing this is that otherwise, things like sv_2cv()
2532 * may leave alloc gunk on the savestack, and some code
2533 * (e.g. sighandler) doesn't expect that...
2535 if (PL_savestack_ix == mgs->mgs_ss_ix)
2537 I32 popval = SSPOPINT;
2538 assert(popval == SAVEt_DESTRUCTOR_X);
2539 PL_savestack_ix -= 2;
2541 assert(popval == SAVEt_ALLOC);
2543 PL_savestack_ix -= popval;
2549 unwind_handler_stack(pTHX_ void *p)
2551 U32 flags = *(U32*)p;
2554 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2555 /* cxstack_ix-- Not needed, die already unwound it. */
2556 #if !defined(PERL_IMPLICIT_CONTEXT)
2558 SvREFCNT_dec(sig_sv);