3 * Copyright (c) 1991-2003, 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 Signal_t Perl_csighandler(int sig);
38 /* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
39 #if !defined(HAS_SIGACTION) && defined(VMS)
40 # define FAKE_PERSISTENT_SIGNAL_HANDLERS
42 /* if we're doing kill() with sys$sigprc on VMS, FAKE_DEFAULT_SIGNAL_HANDLERS */
43 #if defined(KILL_BY_SIGPRC)
44 # define FAKE_DEFAULT_SIGNAL_HANDLERS
47 static void restore_magic(pTHX_ void *p);
48 static void unwind_handler_stack(pTHX_ void *p);
51 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
59 /* MGS is typedef'ed to struct magic_state in perl.h */
62 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
65 assert(SvMAGICAL(sv));
66 #ifdef PERL_COPY_ON_WRITE
67 /* Turning READONLY off for a copy-on-write scalar is a bad idea. */
72 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
74 mgs = SSPTR(mgs_ix, MGS*);
76 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
77 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
81 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
85 =for apidoc mg_magical
87 Turns on the magical status of an SV. See C<sv_magic>.
93 Perl_mg_magical(pTHX_ SV *sv)
96 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
97 MGVTBL* vtbl = mg->mg_virtual;
99 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
103 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
112 Do magic after a value is retrieved from the SV. See C<sv_magic>.
118 Perl_mg_get(pTHX_ SV *sv)
121 MAGIC *newmg, *head, *cur, *mg;
122 I32 mgs_ix = SSNEW(sizeof(MGS));
124 save_magic(mgs_ix, sv);
126 /* We must call svt_get(sv, mg) for each valid entry in the linked
127 list of magic. svt_get() may delete the current entry, add new
128 magic to the head of the list, or upgrade the SV. AMS 20010810 */
130 newmg = cur = head = mg = SvMAGIC(sv);
132 MGVTBL *vtbl = mg->mg_virtual;
134 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
135 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
136 /* Don't restore the flags for this entry if it was deleted. */
137 if (mg->mg_flags & MGf_GSKIP)
138 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
141 mg = mg->mg_moremagic;
144 /* Have we finished with the new entries we saw? Start again
145 where we left off (unless there are more new entries). */
153 /* Were any new entries added? */
154 if (!new && (newmg = SvMAGIC(sv)) != head) {
161 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
168 Do magic after a value is assigned to the SV. See C<sv_magic>.
174 Perl_mg_set(pTHX_ SV *sv)
180 mgs_ix = SSNEW(sizeof(MGS));
181 save_magic(mgs_ix, sv);
183 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
184 MGVTBL* vtbl = mg->mg_virtual;
185 nextmg = mg->mg_moremagic; /* it may delete itself */
186 if (mg->mg_flags & MGf_GSKIP) {
187 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
188 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
190 if (vtbl && vtbl->svt_set)
191 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
194 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
199 =for apidoc mg_length
201 Report on the SV's length. See C<sv_magic>.
207 Perl_mg_length(pTHX_ SV *sv)
212 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
213 MGVTBL* vtbl = mg->mg_virtual;
214 if (vtbl && vtbl->svt_len) {
217 mgs_ix = SSNEW(sizeof(MGS));
218 save_magic(mgs_ix, sv);
219 /* omit MGf_GSKIP -- not changed here */
220 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
221 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
228 U8 *s = (U8*)SvPV(sv, len);
229 len = Perl_utf8_length(aTHX_ s, s + len);
237 Perl_mg_size(pTHX_ SV *sv)
242 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
243 MGVTBL* vtbl = mg->mg_virtual;
244 if (vtbl && vtbl->svt_len) {
247 mgs_ix = SSNEW(sizeof(MGS));
248 save_magic(mgs_ix, sv);
249 /* omit MGf_GSKIP -- not changed here */
250 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
251 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
258 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
263 Perl_croak(aTHX_ "Size magic not implemented");
272 Clear something magical that the SV represents. See C<sv_magic>.
278 Perl_mg_clear(pTHX_ SV *sv)
283 mgs_ix = SSNEW(sizeof(MGS));
284 save_magic(mgs_ix, sv);
286 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
287 MGVTBL* vtbl = mg->mg_virtual;
288 /* omit GSKIP -- never set here */
290 if (vtbl && vtbl->svt_clear)
291 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
294 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
301 Finds the magic pointer for type matching the SV. See C<sv_magic>.
307 Perl_mg_find(pTHX_ SV *sv, int type)
312 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
313 if (mg->mg_type == type)
322 Copies the magic from one SV to another. See C<sv_magic>.
328 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
332 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
333 MGVTBL* vtbl = mg->mg_virtual;
334 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
335 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
337 else if (isUPPER(mg->mg_type)) {
339 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
340 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
342 toLOWER(mg->mg_type), key, klen);
352 Free any magic storage used by the SV. See C<sv_magic>.
358 Perl_mg_free(pTHX_ SV *sv)
362 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
363 MGVTBL* vtbl = mg->mg_virtual;
364 moremagic = mg->mg_moremagic;
365 if (vtbl && vtbl->svt_free)
366 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
367 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
369 Safefree(mg->mg_ptr);
370 else if (mg->mg_len == HEf_SVKEY)
371 SvREFCNT_dec((SV*)mg->mg_ptr);
373 if (mg->mg_flags & MGf_REFCOUNTED)
374 SvREFCNT_dec(mg->mg_obj);
382 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
387 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
391 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
392 if (mg->mg_obj) /* @+ */
395 return rx->lastparen;
402 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
410 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
414 if (paren <= (I32)rx->nparens &&
415 (s = rx->startp[paren]) != -1 &&
416 (t = rx->endp[paren]) != -1)
418 if (mg->mg_obj) /* @+ */
423 if (i > 0 && RX_MATCH_UTF8(rx)) {
424 char *b = rx->subbeg;
426 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
436 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
438 Perl_croak(aTHX_ PL_no_modify);
444 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
451 switch (*mg->mg_ptr) {
452 case '1': case '2': case '3': case '4':
453 case '5': case '6': case '7': case '8': case '9': case '&':
454 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
456 paren = atoi(mg->mg_ptr); /* $& is in [0] */
458 if (paren <= (I32)rx->nparens &&
459 (s1 = rx->startp[paren]) != -1 &&
460 (t1 = rx->endp[paren]) != -1)
464 if (i > 0 && RX_MATCH_UTF8(rx)) {
465 char *s = rx->subbeg + s1;
466 char *send = rx->subbeg + t1;
469 if (is_utf8_string((U8*)s, i))
470 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
473 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
477 if (ckWARN(WARN_UNINITIALIZED))
482 if (ckWARN(WARN_UNINITIALIZED))
487 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
488 paren = rx->lastparen;
493 case '\016': /* ^N */
494 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
495 paren = rx->lastcloseparen;
501 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
502 if (rx->startp[0] != -1) {
513 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
514 if (rx->endp[0] != -1) {
515 i = rx->sublen - rx->endp[0];
526 if (!SvPOK(sv) && SvNIOK(sv)) {
536 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
543 switch (*mg->mg_ptr) {
544 case '\001': /* ^A */
545 sv_setsv(sv, PL_bodytarget);
547 case '\003': /* ^C */
548 sv_setiv(sv, (IV)PL_minus_c);
551 case '\004': /* ^D */
552 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
553 #if defined(YYDEBUG) && defined(DEBUGGING)
554 PL_yydebug = DEBUG_p_TEST;
557 case '\005': /* ^E */
558 if (*(mg->mg_ptr+1) == '\0') {
559 #ifdef MACOS_TRADITIONAL
563 sv_setnv(sv,(double)gMacPerl_OSErr);
564 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
569 # include <descrip.h>
570 # include <starlet.h>
572 $DESCRIPTOR(msgdsc,msg);
573 sv_setnv(sv,(NV) vaxc$errno);
574 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
575 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
581 if (!(_emx_env & 0x200)) { /* Under DOS */
582 sv_setnv(sv, (NV)errno);
583 sv_setpv(sv, errno ? Strerror(errno) : "");
585 if (errno != errno_isOS2) {
586 int tmp = _syserrno();
587 if (tmp) /* 2nd call to _syserrno() makes it 0 */
590 sv_setnv(sv, (NV)Perl_rc);
591 sv_setpv(sv, os2error(Perl_rc));
596 DWORD dwErr = GetLastError();
597 sv_setnv(sv, (NV)dwErr);
600 PerlProc_GetOSError(sv, dwErr);
607 sv_setnv(sv, (NV)errno);
608 sv_setpv(sv, errno ? Strerror(errno) : "");
613 SvNOK_on(sv); /* what a wonderful hack! */
615 else if (strEQ(mg->mg_ptr+1, "NCODING"))
616 sv_setsv(sv, PL_encoding);
618 case '\006': /* ^F */
619 sv_setiv(sv, (IV)PL_maxsysfd);
621 case '\010': /* ^H */
622 sv_setiv(sv, (IV)PL_hints);
624 case '\011': /* ^I */ /* NOT \t in EBCDIC */
626 sv_setpv(sv, PL_inplace);
628 sv_setsv(sv, &PL_sv_undef);
630 case '\017': /* ^O & ^OPEN */
631 if (*(mg->mg_ptr+1) == '\0')
632 sv_setpv(sv, PL_osname);
633 else if (strEQ(mg->mg_ptr, "\017PEN")) {
634 if (!PL_compiling.cop_io)
635 sv_setsv(sv, &PL_sv_undef);
637 sv_setsv(sv, PL_compiling.cop_io);
641 case '\020': /* ^P */
642 sv_setiv(sv, (IV)PL_perldb);
644 case '\023': /* ^S */
645 if (*(mg->mg_ptr+1) == '\0') {
646 if (PL_lex_state != LEX_NOTPARSING)
649 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
654 case '\024': /* ^T */
655 if (*(mg->mg_ptr+1) == '\0') {
657 sv_setnv(sv, PL_basetime);
659 sv_setiv(sv, (IV)PL_basetime);
662 else if (strEQ(mg->mg_ptr, "\024AINT"))
663 sv_setiv(sv, PL_tainting
664 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
667 case '\025': /* $^UNICODE */
668 if (strEQ(mg->mg_ptr, "\025NICODE"))
669 sv_setuv(sv, (UV) PL_unicode);
671 case '\027': /* ^W & $^WARNING_BITS */
672 if (*(mg->mg_ptr+1) == '\0')
673 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
674 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
675 if (PL_compiling.cop_warnings == pWARN_NONE ||
676 PL_compiling.cop_warnings == pWARN_STD)
678 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
680 else if (PL_compiling.cop_warnings == pWARN_ALL) {
681 /* Get the bit mask for $warnings::Bits{all}, because
682 * it could have been extended by warnings::register */
684 HV *bits=get_hv("warnings::Bits", FALSE);
685 if (bits && (bits_all=hv_fetch(bits, "all", 3, FALSE))) {
686 sv_setsv(sv, *bits_all);
689 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
693 sv_setsv(sv, PL_compiling.cop_warnings);
698 case '1': case '2': case '3': case '4':
699 case '5': case '6': case '7': case '8': case '9': case '&':
700 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
704 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
705 * XXX Does the new way break anything?
707 paren = atoi(mg->mg_ptr); /* $& is in [0] */
709 if (paren <= (I32)rx->nparens &&
710 (s1 = rx->startp[paren]) != -1 &&
711 (t1 = rx->endp[paren]) != -1)
721 if (RX_MATCH_UTF8(rx) && is_utf8_string((U8*)s, i))
726 if (RX_MATCH_TAINTED(rx)) {
727 MAGIC* mg = SvMAGIC(sv);
730 SvMAGIC(sv) = mg->mg_moremagic;
732 if ((mgt = SvMAGIC(sv))) {
733 mg->mg_moremagic = mgt;
743 sv_setsv(sv,&PL_sv_undef);
746 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
747 paren = rx->lastparen;
751 sv_setsv(sv,&PL_sv_undef);
753 case '\016': /* ^N */
754 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
755 paren = rx->lastcloseparen;
759 sv_setsv(sv,&PL_sv_undef);
762 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
763 if ((s = rx->subbeg) && rx->startp[0] != -1) {
768 sv_setsv(sv,&PL_sv_undef);
771 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
772 if (rx->subbeg && rx->endp[0] != -1) {
773 s = rx->subbeg + rx->endp[0];
774 i = rx->sublen - rx->endp[0];
778 sv_setsv(sv,&PL_sv_undef);
782 if (GvIO(PL_last_in_gv)) {
783 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
789 sv_setiv(sv, (IV)STATUS_CURRENT);
790 #ifdef COMPLEX_STATUS
791 LvTARGOFF(sv) = PL_statusvalue;
792 LvTARGLEN(sv) = PL_statusvalue_vms;
797 s = IoTOP_NAME(GvIOp(PL_defoutgv));
801 sv_setpv(sv,GvENAME(PL_defoutgv));
806 s = IoFMT_NAME(GvIOp(PL_defoutgv));
808 s = GvENAME(PL_defoutgv);
813 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
816 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
819 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
827 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
830 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
836 sv_copypv(sv, PL_ors_sv);
839 sv_setpv(sv,PL_ofmt);
843 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
844 sv_setpv(sv, errno ? Strerror(errno) : "");
847 int saveerrno = errno;
848 sv_setnv(sv, (NV)errno);
850 if (errno == errno_isOS2 || errno == errno_isOS2_set)
851 sv_setpv(sv, os2error(Perl_rc));
854 sv_setpv(sv, errno ? Strerror(errno) : "");
858 SvNOK_on(sv); /* what a wonderful hack! */
861 sv_setiv(sv, (IV)PL_uid);
864 sv_setiv(sv, (IV)PL_euid);
867 sv_setiv(sv, (IV)PL_gid);
869 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
873 sv_setiv(sv, (IV)PL_egid);
875 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
880 Groups_t gary[NGROUPS];
881 i = getgroups(NGROUPS,gary);
883 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
886 (void)SvIOK_on(sv); /* what a wonderful hack! */
890 #ifndef MACOS_TRADITIONAL
899 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
901 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
903 if (uf && uf->uf_val)
904 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
909 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
919 #ifdef DYNAMIC_ENV_FETCH
920 /* We just undefd an environment var. Is a replacement */
921 /* waiting in the wings? */
924 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
925 s = SvPV(*valp, len);
929 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
930 /* And you'll never guess what the dog had */
931 /* in its mouth... */
933 MgTAINTEDDIR_off(mg);
935 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
936 char pathbuf[256], eltbuf[256], *cp, *elt = s;
940 do { /* DCL$PATH may be a search list */
941 while (1) { /* as may dev portion of any element */
942 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
943 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
944 cando_by_name(S_IWUSR,0,elt) ) {
949 if ((cp = strchr(elt, ':')) != Nullch)
951 if (my_trnlnm(elt, eltbuf, j++))
957 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
960 if (s && klen == 4 && strEQ(ptr,"PATH")) {
961 char *strend = s + len;
967 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
970 if (i >= sizeof tmpbuf /* too long -- assume the worst */
972 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
979 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
985 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
988 my_setenv(MgPV(mg,n_a),Nullch);
993 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
996 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1001 magic_clear_all_env(sv,mg);
1002 hv_iterinit((HV*)sv);
1003 while ((entry = hv_iternext((HV*)sv))) {
1005 my_setenv(hv_iterkey(entry, &keylen),
1006 SvPV(hv_iterval((HV*)sv, entry), n_a));
1014 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1016 #if defined(VMS) || defined(EPOC)
1017 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1019 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1022 # ifdef USE_ENVIRON_ARRAY
1023 # if defined(USE_ITHREADS)
1024 /* only the parent thread can clobber the process environment */
1025 if (PL_curinterp == aTHX)
1028 # ifndef PERL_USE_SAFE_PUTENV
1031 if (environ == PL_origenviron)
1032 environ = (char**)safesysmalloc(sizeof(char*));
1034 for (i = 0; environ[i]; i++)
1035 safesysfree(environ[i]);
1036 # endif /* PERL_USE_SAFE_PUTENV */
1038 environ[0] = Nullch;
1040 # endif /* USE_ENVIRON_ARRAY */
1041 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1042 #endif /* VMS || EPC */
1046 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1047 static int sig_handlers_initted = 0;
1049 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1050 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1052 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1053 static int sig_defaulting[SIG_SIZE];
1057 #ifdef HAS_SIGPROCMASK
1059 restore_sigmask(pTHX_ SV *save_sv)
1061 sigset_t *ossetp = (sigset_t *) SvPV_nolen( save_sv );
1062 (void)sigprocmask(SIG_SETMASK, ossetp, (sigset_t *)0);
1066 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1070 /* Are we fetching a signal entry? */
1071 i = whichsig(MgPV(mg,n_a));
1074 sv_setsv(sv,PL_psig_ptr[i]);
1076 Sighandler_t sigstate;
1077 sigstate = rsignal_state(i);
1078 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1079 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1081 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1082 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1084 /* cache state so we don't fetch it again */
1085 if(sigstate == SIG_IGN)
1086 sv_setpv(sv,"IGNORE");
1088 sv_setsv(sv,&PL_sv_undef);
1089 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1096 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1098 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1099 * refactoring might be in order.
1107 if (strEQ(s,"__DIE__"))
1109 else if (strEQ(s,"__WARN__"))
1112 Perl_croak(aTHX_ "No such hook: %s", s);
1116 SvREFCNT_dec(to_dec);
1121 /* Are we clearing a signal entry? */
1124 #ifdef HAS_SIGPROCMASK
1127 /* Avoid having the signal arrive at a bad time, if possible. */
1130 sigprocmask(SIG_BLOCK, &set, &save);
1132 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1133 SAVEFREESV(save_sv);
1134 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1137 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1138 if (!sig_handlers_initted) Perl_csighandler_init();
1140 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1141 sig_defaulting[i] = 1;
1142 (void)rsignal(i, &Perl_csighandler);
1144 (void)rsignal(i, SIG_DFL);
1146 if(PL_psig_name[i]) {
1147 SvREFCNT_dec(PL_psig_name[i]);
1150 if(PL_psig_ptr[i]) {
1151 to_dec=PL_psig_ptr[i];
1154 SvREFCNT_dec(to_dec);
1164 Perl_raise_signal(pTHX_ int sig)
1166 /* Set a flag to say this signal is pending */
1167 PL_psig_pend[sig]++;
1168 /* And one to say _a_ signal is pending */
1173 Perl_csighandler(int sig)
1175 #ifdef PERL_GET_SIG_CONTEXT
1176 dTHXa(PERL_GET_SIG_CONTEXT);
1180 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1181 (void) rsignal(sig, &Perl_csighandler);
1182 if (sig_ignoring[sig]) return;
1184 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1185 if (sig_defaulting[sig])
1186 #ifdef KILL_BY_SIGPRC
1187 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1192 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
1193 /* Call the perl level handler now--
1194 * with risk we may be in malloc() etc. */
1195 (*PL_sighandlerp)(sig);
1197 Perl_raise_signal(aTHX_ sig);
1200 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1202 Perl_csighandler_init(void)
1205 if (sig_handlers_initted) return;
1207 for (sig = 1; sig < SIG_SIZE; sig++) {
1208 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1210 sig_defaulting[sig] = 1;
1211 (void) rsignal(sig, &Perl_csighandler);
1213 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1214 sig_ignoring[sig] = 0;
1217 sig_handlers_initted = 1;
1222 Perl_despatch_signals(pTHX)
1226 for (sig = 1; sig < SIG_SIZE; sig++) {
1227 if (PL_psig_pend[sig]) {
1228 PERL_BLOCKSIG_ADD(set, sig);
1229 PL_psig_pend[sig] = 0;
1230 PERL_BLOCKSIG_BLOCK(set);
1231 (*PL_sighandlerp)(sig);
1232 PERL_BLOCKSIG_UNBLOCK(set);
1238 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1243 /* Need to be careful with SvREFCNT_dec(), because that can have side
1244 * effects (due to closures). We must make sure that the new disposition
1245 * is in place before it is called.
1249 #ifdef HAS_SIGPROCMASK
1256 if (strEQ(s,"__DIE__"))
1258 else if (strEQ(s,"__WARN__"))
1261 Perl_croak(aTHX_ "No such hook: %s", s);
1269 i = whichsig(s); /* ...no, a brick */
1271 if (ckWARN(WARN_SIGNAL))
1272 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1275 #ifdef HAS_SIGPROCMASK
1276 /* Avoid having the signal arrive at a bad time, if possible. */
1279 sigprocmask(SIG_BLOCK, &set, &save);
1281 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1282 SAVEFREESV(save_sv);
1283 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1286 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1287 if (!sig_handlers_initted) Perl_csighandler_init();
1289 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1290 sig_ignoring[i] = 0;
1292 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1293 sig_defaulting[i] = 0;
1295 SvREFCNT_dec(PL_psig_name[i]);
1296 to_dec = PL_psig_ptr[i];
1297 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1298 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1299 PL_psig_name[i] = newSVpvn(s, len);
1300 SvREADONLY_on(PL_psig_name[i]);
1302 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1304 (void)rsignal(i, &Perl_csighandler);
1305 #ifdef HAS_SIGPROCMASK
1310 *svp = SvREFCNT_inc(sv);
1312 SvREFCNT_dec(to_dec);
1315 s = SvPV_force(sv,len);
1316 if (strEQ(s,"IGNORE")) {
1318 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1319 sig_ignoring[i] = 1;
1320 (void)rsignal(i, &Perl_csighandler);
1322 (void)rsignal(i, SIG_IGN);
1326 else if (strEQ(s,"DEFAULT") || !*s) {
1328 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1330 sig_defaulting[i] = 1;
1331 (void)rsignal(i, &Perl_csighandler);
1334 (void)rsignal(i, SIG_DFL);
1339 * We should warn if HINT_STRICT_REFS, but without
1340 * access to a known hint bit in a known OP, we can't
1341 * tell whether HINT_STRICT_REFS is in force or not.
1343 if (!strchr(s,':') && !strchr(s,'\''))
1344 sv_insert(sv, 0, 0, "main::", 6);
1346 (void)rsignal(i, &Perl_csighandler);
1348 *svp = SvREFCNT_inc(sv);
1350 #ifdef HAS_SIGPROCMASK
1355 SvREFCNT_dec(to_dec);
1358 #endif /* !PERL_MICRO */
1361 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1363 PL_sub_generation++;
1368 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1370 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1371 PL_amagic_generation++;
1377 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1379 HV *hv = (HV*)LvTARG(sv);
1383 (void) hv_iterinit(hv);
1384 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1387 while (hv_iternext(hv))
1392 sv_setiv(sv, (IV)i);
1397 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1400 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1405 /* caller is responsible for stack switching/cleanup */
1407 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1413 PUSHs(SvTIED_obj(sv, mg));
1416 if (mg->mg_len >= 0)
1417 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1418 else if (mg->mg_len == HEf_SVKEY)
1419 PUSHs((SV*)mg->mg_ptr);
1421 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1422 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1430 return call_method(meth, flags);
1434 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1440 PUSHSTACKi(PERLSI_MAGIC);
1442 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1443 sv_setsv(sv, *PL_stack_sp--);
1453 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1455 magic_methpack(sv,mg,"FETCH");
1457 mg->mg_flags |= MGf_GSKIP;
1462 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1466 PUSHSTACKi(PERLSI_MAGIC);
1467 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1474 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1476 return magic_methpack(sv,mg,"DELETE");
1481 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1488 PUSHSTACKi(PERLSI_MAGIC);
1489 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1490 sv = *PL_stack_sp--;
1491 retval = (U32) SvIV(sv)-1;
1500 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1505 PUSHSTACKi(PERLSI_MAGIC);
1507 XPUSHs(SvTIED_obj(sv, mg));
1509 call_method("CLEAR", G_SCALAR|G_DISCARD);
1516 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1519 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1523 PUSHSTACKi(PERLSI_MAGIC);
1526 PUSHs(SvTIED_obj(sv, mg));
1531 if (call_method(meth, G_SCALAR))
1532 sv_setsv(key, *PL_stack_sp--);
1541 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1543 return magic_methpack(sv,mg,"EXISTS");
1547 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1557 svp = av_fetch(GvAV(gv),
1558 atoi(MgPV(mg,n_a)), FALSE);
1559 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp)))) {
1560 /* set or clear breakpoint in the relevant control op */
1562 o->op_flags |= OPf_SPECIAL;
1564 o->op_flags &= ~OPf_SPECIAL;
1570 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1572 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1577 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1579 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1584 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1586 SV* lsv = LvTARG(sv);
1588 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1589 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1590 if (mg && mg->mg_len >= 0) {
1593 sv_pos_b2u(lsv, &i);
1594 sv_setiv(sv, i + PL_curcop->cop_arybase);
1603 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1605 SV* lsv = LvTARG(sv);
1612 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1613 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1617 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1618 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1620 else if (!SvOK(sv)) {
1624 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1626 pos = SvIV(sv) - PL_curcop->cop_arybase;
1629 ulen = sv_len_utf8(lsv);
1639 else if (pos > (SSize_t)len)
1644 sv_pos_u2b(lsv, &p, 0);
1649 mg->mg_flags &= ~MGf_MINMATCH;
1655 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1657 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1659 gv_efullname3(sv,((GV*)sv), "*");
1663 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1668 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1677 if (*s == '*' && s[1])
1679 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1684 GvGP(sv) = gp_ref(GvGP(gv));
1689 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1692 SV *lsv = LvTARG(sv);
1693 char *tmps = SvPV(lsv,len);
1694 I32 offs = LvTARGOFF(sv);
1695 I32 rem = LvTARGLEN(sv);
1698 sv_pos_u2b(lsv, &offs, &rem);
1699 if (offs > (I32)len)
1701 if (rem + offs > (I32)len)
1703 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1710 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1713 char *tmps = SvPV(sv, len);
1714 SV *lsv = LvTARG(sv);
1715 I32 lvoff = LvTARGOFF(sv);
1716 I32 lvlen = LvTARGLEN(sv);
1719 sv_utf8_upgrade(lsv);
1720 sv_pos_u2b(lsv, &lvoff, &lvlen);
1721 sv_insert(lsv, lvoff, lvlen, tmps, len);
1724 else if (lsv && SvUTF8(lsv)) {
1725 sv_pos_u2b(lsv, &lvoff, &lvlen);
1726 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1727 sv_insert(lsv, lvoff, lvlen, tmps, len);
1731 sv_insert(lsv, lvoff, lvlen, tmps, len);
1737 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1739 TAINT_IF((mg->mg_len & 1) ||
1740 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1745 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1747 if (PL_localizing) {
1748 if (PL_localizing == 1)
1753 else if (PL_tainted)
1761 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1763 SV *lsv = LvTARG(sv);
1770 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1775 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1777 do_vecset(sv); /* XXX slurp this routine */
1782 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1785 if (LvTARGLEN(sv)) {
1787 SV *ahv = LvTARG(sv);
1788 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1793 AV* av = (AV*)LvTARG(sv);
1794 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1795 targ = AvARRAY(av)[LvTARGOFF(sv)];
1797 if (targ && targ != &PL_sv_undef) {
1798 /* somebody else defined it for us */
1799 SvREFCNT_dec(LvTARG(sv));
1800 LvTARG(sv) = SvREFCNT_inc(targ);
1802 SvREFCNT_dec(mg->mg_obj);
1803 mg->mg_obj = Nullsv;
1804 mg->mg_flags &= ~MGf_REFCOUNTED;
1809 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1814 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1819 sv_setsv(LvTARG(sv), sv);
1820 SvSETMAGIC(LvTARG(sv));
1826 Perl_vivify_defelem(pTHX_ SV *sv)
1831 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1834 SV *ahv = LvTARG(sv);
1836 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1839 if (!value || value == &PL_sv_undef)
1840 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1843 AV* av = (AV*)LvTARG(sv);
1844 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1845 LvTARG(sv) = Nullsv; /* array can't be extended */
1847 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1848 if (!svp || (value = *svp) == &PL_sv_undef)
1849 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1852 (void)SvREFCNT_inc(value);
1853 SvREFCNT_dec(LvTARG(sv));
1856 SvREFCNT_dec(mg->mg_obj);
1857 mg->mg_obj = Nullsv;
1858 mg->mg_flags &= ~MGf_REFCOUNTED;
1862 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1864 AV *av = (AV*)mg->mg_obj;
1865 SV **svp = AvARRAY(av);
1866 I32 i = AvFILLp(av);
1868 if (svp[i] && svp[i] != &PL_sv_undef) {
1869 if (!SvWEAKREF(svp[i]))
1870 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1871 /* XXX Should we check that it hasn't changed? */
1873 (void)SvOK_off(svp[i]);
1874 SvWEAKREF_off(svp[i]);
1875 svp[i] = &PL_sv_undef;
1883 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1891 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1893 sv_unmagic(sv, PERL_MAGIC_bm);
1899 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1901 sv_unmagic(sv, PERL_MAGIC_fm);
1907 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1909 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1911 if (uf && uf->uf_set)
1912 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1917 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
1919 sv_unmagic(sv, PERL_MAGIC_qr);
1924 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1926 regexp *re = (regexp *)mg->mg_obj;
1931 #ifdef USE_LOCALE_COLLATE
1933 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1936 * RenE<eacute> Descartes said "I think not."
1937 * and vanished with a faint plop.
1940 Safefree(mg->mg_ptr);
1946 #endif /* USE_LOCALE_COLLATE */
1948 /* Just clear the UTF-8 cache data. */
1950 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
1952 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
1954 mg->mg_len = -1; /* The mg_len holds the len cache. */
1959 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1964 switch (*mg->mg_ptr) {
1965 case '\001': /* ^A */
1966 sv_setsv(PL_bodytarget, sv);
1968 case '\003': /* ^C */
1969 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1972 case '\004': /* ^D */
1973 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1974 DEBUG_x(dump_all());
1976 case '\005': /* ^E */
1977 if (*(mg->mg_ptr+1) == '\0') {
1978 #ifdef MACOS_TRADITIONAL
1979 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1982 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1985 SetLastError( SvIV(sv) );
1988 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1990 /* will anyone ever use this? */
1991 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1997 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
1999 SvREFCNT_dec(PL_encoding);
2000 if (SvOK(sv) || SvGMAGICAL(sv)) {
2001 PL_encoding = newSVsv(sv);
2004 PL_encoding = Nullsv;
2008 case '\006': /* ^F */
2009 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2011 case '\010': /* ^H */
2012 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2014 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2016 Safefree(PL_inplace);
2018 PL_inplace = savepv(SvPV(sv,len));
2020 PL_inplace = Nullch;
2022 case '\017': /* ^O */
2023 if (*(mg->mg_ptr+1) == '\0') {
2025 Safefree(PL_osname);
2027 PL_osname = savepv(SvPV(sv,len));
2031 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2032 if (!PL_compiling.cop_io)
2033 PL_compiling.cop_io = newSVsv(sv);
2035 sv_setsv(PL_compiling.cop_io,sv);
2038 case '\020': /* ^P */
2039 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2040 if (PL_perldb && !PL_DBsingle)
2043 case '\024': /* ^T */
2045 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2047 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2050 case '\027': /* ^W & $^WARNING_BITS */
2051 if (*(mg->mg_ptr+1) == '\0') {
2052 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2053 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2054 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2055 | (i ? G_WARN_ON : G_WARN_OFF) ;
2058 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2059 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2060 if (!SvPOK(sv) && PL_localizing) {
2061 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2062 PL_compiling.cop_warnings = pWARN_NONE;
2067 int accumulate = 0 ;
2068 int any_fatals = 0 ;
2069 char * ptr = (char*)SvPV(sv, len) ;
2070 for (i = 0 ; i < len ; ++i) {
2071 accumulate |= ptr[i] ;
2072 any_fatals |= (ptr[i] & 0xAA) ;
2075 PL_compiling.cop_warnings = pWARN_NONE;
2076 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
2077 PL_compiling.cop_warnings = pWARN_ALL;
2078 PL_dowarn |= G_WARN_ONCE ;
2081 if (specialWARN(PL_compiling.cop_warnings))
2082 PL_compiling.cop_warnings = newSVsv(sv) ;
2084 sv_setsv(PL_compiling.cop_warnings, sv);
2085 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2086 PL_dowarn |= G_WARN_ONCE ;
2094 if (PL_localizing) {
2095 if (PL_localizing == 1)
2096 SAVESPTR(PL_last_in_gv);
2098 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2099 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2102 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2103 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
2104 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
2107 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2108 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
2109 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
2112 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2115 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2116 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2117 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2120 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2124 IO *io = GvIOp(PL_defoutgv);
2127 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2128 IoFLAGS(io) &= ~IOf_FLUSH;
2130 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2131 PerlIO *ofp = IoOFP(io);
2133 (void)PerlIO_flush(ofp);
2134 IoFLAGS(io) |= IOf_FLUSH;
2140 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2141 PL_multiline = (i != 0);
2144 SvREFCNT_dec(PL_rs);
2145 PL_rs = newSVsv(sv);
2149 SvREFCNT_dec(PL_ors_sv);
2150 if (SvOK(sv) || SvGMAGICAL(sv)) {
2151 PL_ors_sv = newSVsv(sv);
2159 SvREFCNT_dec(PL_ofs_sv);
2160 if (SvOK(sv) || SvGMAGICAL(sv)) {
2161 PL_ofs_sv = newSVsv(sv);
2170 PL_ofmt = savepv(SvPV(sv,len));
2173 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2176 #ifdef COMPLEX_STATUS
2177 if (PL_localizing == 2) {
2178 PL_statusvalue = LvTARGOFF(sv);
2179 PL_statusvalue_vms = LvTARGLEN(sv);
2183 #ifdef VMSISH_STATUS
2185 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2188 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2193 # define PERL_VMS_BANG vaxc$errno
2195 # define PERL_VMS_BANG 0
2197 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2198 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2202 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2203 if (PL_delaymagic) {
2204 PL_delaymagic |= DM_RUID;
2205 break; /* don't do magic till later */
2208 (void)setruid((Uid_t)PL_uid);
2211 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2213 #ifdef HAS_SETRESUID
2214 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2216 if (PL_uid == PL_euid) /* special case $< = $> */
2217 (void)PerlProc_setuid(PL_uid);
2219 PL_uid = PerlProc_getuid();
2220 Perl_croak(aTHX_ "setruid() not implemented");
2225 PL_uid = PerlProc_getuid();
2226 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2229 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2230 if (PL_delaymagic) {
2231 PL_delaymagic |= DM_EUID;
2232 break; /* don't do magic till later */
2235 (void)seteuid((Uid_t)PL_euid);
2238 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2240 #ifdef HAS_SETRESUID
2241 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2243 if (PL_euid == PL_uid) /* special case $> = $< */
2244 PerlProc_setuid(PL_euid);
2246 PL_euid = PerlProc_geteuid();
2247 Perl_croak(aTHX_ "seteuid() not implemented");
2252 PL_euid = PerlProc_geteuid();
2253 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2256 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2257 if (PL_delaymagic) {
2258 PL_delaymagic |= DM_RGID;
2259 break; /* don't do magic till later */
2262 (void)setrgid((Gid_t)PL_gid);
2265 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2267 #ifdef HAS_SETRESGID
2268 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2270 if (PL_gid == PL_egid) /* special case $( = $) */
2271 (void)PerlProc_setgid(PL_gid);
2273 PL_gid = PerlProc_getgid();
2274 Perl_croak(aTHX_ "setrgid() not implemented");
2279 PL_gid = PerlProc_getgid();
2280 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2283 #ifdef HAS_SETGROUPS
2285 char *p = SvPV(sv, len);
2286 Groups_t gary[NGROUPS];
2291 for (i = 0; i < NGROUPS; ++i) {
2292 while (*p && !isSPACE(*p))
2301 (void)setgroups(i, gary);
2303 #else /* HAS_SETGROUPS */
2304 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2305 #endif /* HAS_SETGROUPS */
2306 if (PL_delaymagic) {
2307 PL_delaymagic |= DM_EGID;
2308 break; /* don't do magic till later */
2311 (void)setegid((Gid_t)PL_egid);
2314 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2316 #ifdef HAS_SETRESGID
2317 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2319 if (PL_egid == PL_gid) /* special case $) = $( */
2320 (void)PerlProc_setgid(PL_egid);
2322 PL_egid = PerlProc_getegid();
2323 Perl_croak(aTHX_ "setegid() not implemented");
2328 PL_egid = PerlProc_getegid();
2329 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2332 PL_chopset = SvPV_force(sv,len);
2334 #ifndef MACOS_TRADITIONAL
2336 LOCK_DOLLARZERO_MUTEX;
2337 #ifdef HAS_SETPROCTITLE
2338 /* The BSDs don't show the argv[] in ps(1) output, they
2339 * show a string from the process struct and provide
2340 * the setproctitle() routine to manipulate that. */
2343 # if __FreeBSD_version > 410001
2344 /* The leading "-" removes the "perl: " prefix,
2345 * but not the "(perl) suffix from the ps(1)
2346 * output, because that's what ps(1) shows if the
2347 * argv[] is modified. */
2348 setproctitle("-%s", s);
2349 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2350 /* This doesn't really work if you assume that
2351 * $0 = 'foobar'; will wipe out 'perl' from the $0
2352 * because in ps(1) output the result will be like
2353 * sprintf("perl: %s (perl)", s)
2354 * I guess this is a security feature:
2355 * one (a user process) cannot get rid of the original name.
2357 setproctitle("%s", s);
2361 #if defined(__hpux) && defined(PSTAT_SETCMD)
2366 pstat(PSTAT_SETCMD, un, len, 0, 0);
2372 /* See if all the arguments are contiguous in memory */
2373 for (i = 1; i < PL_origargc; i++) {
2374 if (PL_origargv[i] == s + 1
2376 || PL_origargv[i] == s + 2
2381 s += strlen(s); /* this one is ok too */
2386 /* can grab env area too? */
2389 && PL_curinterp == aTHX
2391 && (PL_origenviron[0] == s + 1))
2393 my_setenv("NoNe SuCh", Nullch);
2394 /* force copy of environment */
2395 for (i = 0; PL_origenviron[i]; i++)
2396 if (PL_origenviron[i] == s + 1) {
2403 PL_origalen = s - PL_origargv[0];
2405 s = SvPV_force(sv,len);
2407 if (i >= (I32)PL_origalen) {
2409 /* don't allow system to limit $0 seen by script */
2410 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2411 Copy(s, PL_origargv[0], i, char);
2412 s = PL_origargv[0]+i;
2416 Copy(s, PL_origargv[0], i, char);
2417 s = PL_origargv[0]+i;
2419 while (++i < (I32)PL_origalen)
2421 for (i = 1; i < PL_origargc; i++)
2422 PL_origargv[i] = Nullch;
2424 UNLOCK_DOLLARZERO_MUTEX;
2432 Perl_whichsig(pTHX_ char *sig)
2434 register char **sigv;
2436 for (sigv = PL_sig_name+1; *sigv; sigv++)
2437 if (strEQ(sig,*sigv))
2438 return PL_sig_num[sigv - PL_sig_name];
2440 if (strEQ(sig,"CHLD"))
2444 if (strEQ(sig,"CLD"))
2450 #if !defined(PERL_IMPLICIT_CONTEXT)
2455 Perl_sighandler(int sig)
2457 #ifdef PERL_GET_SIG_CONTEXT
2458 dTHXa(PERL_GET_SIG_CONTEXT);
2465 SV *sv = Nullsv, *tSv = PL_Sv;
2471 if (PL_savestack_ix + 15 <= PL_savestack_max)
2473 if (PL_markstack_ptr < PL_markstack_max - 2)
2475 if (PL_retstack_ix < PL_retstack_max - 2)
2477 if (PL_scopestack_ix < PL_scopestack_max - 3)
2480 if (!PL_psig_ptr[sig]) {
2481 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2486 /* Max number of items pushed there is 3*n or 4. We cannot fix
2487 infinity, so we fix 4 (in fact 5): */
2489 PL_savestack_ix += 5; /* Protect save in progress. */
2490 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2493 PL_markstack_ptr++; /* Protect mark. */
2496 PL_retstack[PL_retstack_ix] = NULL;
2499 PL_scopestack_ix += 1;
2500 /* sv_2cv is too complicated, try a simpler variant first: */
2501 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2502 || SvTYPE(cv) != SVt_PVCV)
2503 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2505 if (!cv || !CvROOT(cv)) {
2506 if (ckWARN(WARN_SIGNAL))
2507 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2508 PL_sig_name[sig], (gv ? GvENAME(gv)
2515 if(PL_psig_name[sig]) {
2516 sv = SvREFCNT_inc(PL_psig_name[sig]);
2518 #if !defined(PERL_IMPLICIT_CONTEXT)
2522 sv = sv_newmortal();
2523 sv_setpv(sv,PL_sig_name[sig]);
2526 PUSHSTACKi(PERLSI_SIGNAL);
2531 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2534 if (SvTRUE(ERRSV)) {
2536 #ifdef HAS_SIGPROCMASK
2537 /* Handler "died", for example to get out of a restart-able read().
2538 * Before we re-do that on its behalf re-enable the signal which was
2539 * blocked by the system when we entered.
2543 sigaddset(&set,sig);
2544 sigprocmask(SIG_UNBLOCK, &set, NULL);
2546 /* Not clear if this will work */
2547 (void)rsignal(sig, SIG_IGN);
2548 (void)rsignal(sig, &Perl_csighandler);
2550 #endif /* !PERL_MICRO */
2551 Perl_die(aTHX_ Nullformat);
2555 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2561 PL_scopestack_ix -= 1;
2564 PL_op = myop; /* Apparently not needed... */
2566 PL_Sv = tSv; /* Restore global temporaries. */
2573 restore_magic(pTHX_ void *p)
2575 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2576 SV* sv = mgs->mgs_sv;
2581 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2584 SvFLAGS(sv) |= mgs->mgs_flags;
2588 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2591 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2593 /* If we're still on top of the stack, pop us off. (That condition
2594 * will be satisfied if restore_magic was called explicitly, but *not*
2595 * if it's being called via leave_scope.)
2596 * The reason for doing this is that otherwise, things like sv_2cv()
2597 * may leave alloc gunk on the savestack, and some code
2598 * (e.g. sighandler) doesn't expect that...
2600 if (PL_savestack_ix == mgs->mgs_ss_ix)
2602 I32 popval = SSPOPINT;
2603 assert(popval == SAVEt_DESTRUCTOR_X);
2604 PL_savestack_ix -= 2;
2606 assert(popval == SAVEt_ALLOC);
2608 PL_savestack_ix -= popval;
2614 unwind_handler_stack(pTHX_ void *p)
2616 U32 flags = *(U32*)p;
2619 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2620 /* cxstack_ix-- Not needed, die already unwound it. */
2621 #if !defined(PERL_IMPLICIT_CONTEXT)
2623 SvREFCNT_dec(sig_sv);