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));
67 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
69 mgs = SSPTR(mgs_ix, MGS*);
71 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
72 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
76 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
80 =for apidoc mg_magical
82 Turns on the magical status of an SV. See C<sv_magic>.
88 Perl_mg_magical(pTHX_ SV *sv)
91 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
92 MGVTBL* vtbl = mg->mg_virtual;
94 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
98 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
107 Do magic after a value is retrieved from the SV. See C<sv_magic>.
113 Perl_mg_get(pTHX_ SV *sv)
116 MAGIC *newmg, *head, *cur, *mg;
117 I32 mgs_ix = SSNEW(sizeof(MGS));
119 save_magic(mgs_ix, sv);
121 /* We must call svt_get(sv, mg) for each valid entry in the linked
122 list of magic. svt_get() may delete the current entry, add new
123 magic to the head of the list, or upgrade the SV. AMS 20010810 */
125 newmg = cur = head = mg = SvMAGIC(sv);
127 MGVTBL *vtbl = mg->mg_virtual;
129 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
130 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
132 /* guard against sv having been freed */
133 if (SvTYPE(sv) == SVTYPEMASK) {
134 Perl_croak(aTHX_ "Tied variable freed while still in use");
137 /* Don't restore the flags for this entry if it was deleted. */
138 if (mg->mg_flags & MGf_GSKIP)
139 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
142 mg = mg->mg_moremagic;
145 /* Have we finished with the new entries we saw? Start again
146 where we left off (unless there are more new entries). */
154 /* Were any new entries added? */
155 if (!new && (newmg = SvMAGIC(sv)) != head) {
162 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
169 Do magic after a value is assigned to the SV. See C<sv_magic>.
175 Perl_mg_set(pTHX_ SV *sv)
181 mgs_ix = SSNEW(sizeof(MGS));
182 save_magic(mgs_ix, sv);
184 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
185 MGVTBL* vtbl = mg->mg_virtual;
186 nextmg = mg->mg_moremagic; /* it may delete itself */
187 if (mg->mg_flags & MGf_GSKIP) {
188 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
189 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
191 if (vtbl && vtbl->svt_set)
192 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
195 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
200 =for apidoc mg_length
202 Report on the SV's length. See C<sv_magic>.
208 Perl_mg_length(pTHX_ SV *sv)
213 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
214 MGVTBL* vtbl = mg->mg_virtual;
215 if (vtbl && vtbl->svt_len) {
218 mgs_ix = SSNEW(sizeof(MGS));
219 save_magic(mgs_ix, sv);
220 /* omit MGf_GSKIP -- not changed here */
221 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
222 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
229 U8 *s = (U8*)SvPV(sv, len);
230 len = Perl_utf8_length(aTHX_ s, s + len);
238 Perl_mg_size(pTHX_ SV *sv)
243 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
244 MGVTBL* vtbl = mg->mg_virtual;
245 if (vtbl && vtbl->svt_len) {
248 mgs_ix = SSNEW(sizeof(MGS));
249 save_magic(mgs_ix, sv);
250 /* omit MGf_GSKIP -- not changed here */
251 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
252 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
259 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
264 Perl_croak(aTHX_ "Size magic not implemented");
273 Clear something magical that the SV represents. See C<sv_magic>.
279 Perl_mg_clear(pTHX_ SV *sv)
284 mgs_ix = SSNEW(sizeof(MGS));
285 save_magic(mgs_ix, sv);
287 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
288 MGVTBL* vtbl = mg->mg_virtual;
289 /* omit GSKIP -- never set here */
291 if (vtbl && vtbl->svt_clear)
292 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
295 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
302 Finds the magic pointer for type matching the SV. See C<sv_magic>.
308 Perl_mg_find(pTHX_ SV *sv, int type)
313 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
314 if (mg->mg_type == type)
323 Copies the magic from one SV to another. See C<sv_magic>.
329 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
333 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
334 MGVTBL* vtbl = mg->mg_virtual;
335 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
336 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
338 else if (isUPPER(mg->mg_type)) {
340 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
341 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
343 toLOWER(mg->mg_type), key, klen);
353 Free any magic storage used by the SV. See C<sv_magic>.
359 Perl_mg_free(pTHX_ SV *sv)
363 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
364 MGVTBL* vtbl = mg->mg_virtual;
365 moremagic = mg->mg_moremagic;
366 if (vtbl && vtbl->svt_free)
367 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
368 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
370 Safefree(mg->mg_ptr);
371 else if (mg->mg_len == HEf_SVKEY)
372 SvREFCNT_dec((SV*)mg->mg_ptr);
374 if (mg->mg_flags & MGf_REFCOUNTED)
375 SvREFCNT_dec(mg->mg_obj);
383 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
388 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
392 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
393 if (mg->mg_obj) /* @+ */
396 return rx->lastparen;
403 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
411 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
415 if (paren <= (I32)rx->nparens &&
416 (s = rx->startp[paren]) != -1 &&
417 (t = rx->endp[paren]) != -1)
419 if (mg->mg_obj) /* @+ */
424 if (i > 0 && RX_MATCH_UTF8(rx)) {
425 char *b = rx->subbeg;
427 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
437 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
439 Perl_croak(aTHX_ PL_no_modify);
445 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
452 switch (*mg->mg_ptr) {
453 case '1': case '2': case '3': case '4':
454 case '5': case '6': case '7': case '8': case '9': case '&':
455 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
457 paren = atoi(mg->mg_ptr); /* $& is in [0] */
459 if (paren <= (I32)rx->nparens &&
460 (s1 = rx->startp[paren]) != -1 &&
461 (t1 = rx->endp[paren]) != -1)
465 if (i > 0 && RX_MATCH_UTF8(rx)) {
466 char *s = rx->subbeg + s1;
467 char *send = rx->subbeg + t1;
470 if (is_utf8_string((U8*)s, i))
471 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
474 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
478 if (ckWARN(WARN_UNINITIALIZED))
483 if (ckWARN(WARN_UNINITIALIZED))
488 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
489 paren = rx->lastparen;
494 case '\016': /* ^N */
495 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
496 paren = rx->lastcloseparen;
502 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
503 if (rx->startp[0] != -1) {
514 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
515 if (rx->endp[0] != -1) {
516 i = rx->sublen - rx->endp[0];
527 if (!SvPOK(sv) && SvNIOK(sv)) {
537 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
544 switch (*mg->mg_ptr) {
545 case '\001': /* ^A */
546 sv_setsv(sv, PL_bodytarget);
548 case '\003': /* ^C */
549 sv_setiv(sv, (IV)PL_minus_c);
552 case '\004': /* ^D */
553 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
554 #if defined(YYDEBUG) && defined(DEBUGGING)
555 PL_yydebug = DEBUG_p_TEST;
558 case '\005': /* ^E */
559 if (*(mg->mg_ptr+1) == '\0') {
560 #ifdef MACOS_TRADITIONAL
564 sv_setnv(sv,(double)gMacPerl_OSErr);
565 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
570 # include <descrip.h>
571 # include <starlet.h>
573 $DESCRIPTOR(msgdsc,msg);
574 sv_setnv(sv,(NV) vaxc$errno);
575 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
576 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
582 if (!(_emx_env & 0x200)) { /* Under DOS */
583 sv_setnv(sv, (NV)errno);
584 sv_setpv(sv, errno ? Strerror(errno) : "");
586 if (errno != errno_isOS2) {
587 int tmp = _syserrno();
588 if (tmp) /* 2nd call to _syserrno() makes it 0 */
591 sv_setnv(sv, (NV)Perl_rc);
592 sv_setpv(sv, os2error(Perl_rc));
597 DWORD dwErr = GetLastError();
598 sv_setnv(sv, (NV)dwErr);
601 PerlProc_GetOSError(sv, dwErr);
608 sv_setnv(sv, (NV)errno);
609 sv_setpv(sv, errno ? Strerror(errno) : "");
614 SvNOK_on(sv); /* what a wonderful hack! */
616 else if (strEQ(mg->mg_ptr+1, "NCODING"))
617 sv_setsv(sv, PL_encoding);
619 case '\006': /* ^F */
620 sv_setiv(sv, (IV)PL_maxsysfd);
622 case '\010': /* ^H */
623 sv_setiv(sv, (IV)PL_hints);
625 case '\011': /* ^I */ /* NOT \t in EBCDIC */
627 sv_setpv(sv, PL_inplace);
629 sv_setsv(sv, &PL_sv_undef);
631 case '\017': /* ^O & ^OPEN */
632 if (*(mg->mg_ptr+1) == '\0')
633 sv_setpv(sv, PL_osname);
634 else if (strEQ(mg->mg_ptr, "\017PEN")) {
635 if (!PL_compiling.cop_io)
636 sv_setsv(sv, &PL_sv_undef);
638 sv_setsv(sv, PL_compiling.cop_io);
642 case '\020': /* ^P */
643 sv_setiv(sv, (IV)PL_perldb);
645 case '\023': /* ^S */
646 if (*(mg->mg_ptr+1) == '\0') {
647 if (PL_lex_state != LEX_NOTPARSING)
650 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
655 case '\024': /* ^T */
656 if (*(mg->mg_ptr+1) == '\0') {
658 sv_setnv(sv, PL_basetime);
660 sv_setiv(sv, (IV)PL_basetime);
663 else if (strEQ(mg->mg_ptr, "\024AINT"))
664 sv_setiv(sv, PL_tainting
665 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
668 case '\025': /* $^UNICODE */
669 if (strEQ(mg->mg_ptr, "\025NICODE"))
670 sv_setuv(sv, (UV) PL_unicode);
672 case '\027': /* ^W & $^WARNING_BITS */
673 if (*(mg->mg_ptr+1) == '\0')
674 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
675 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
676 if (PL_compiling.cop_warnings == pWARN_NONE ||
677 PL_compiling.cop_warnings == pWARN_STD)
679 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
681 else if (PL_compiling.cop_warnings == pWARN_ALL) {
682 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
685 sv_setsv(sv, PL_compiling.cop_warnings);
690 case '1': case '2': case '3': case '4':
691 case '5': case '6': case '7': case '8': case '9': case '&':
692 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
696 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
697 * XXX Does the new way break anything?
699 paren = atoi(mg->mg_ptr); /* $& is in [0] */
701 if (paren <= (I32)rx->nparens &&
702 (s1 = rx->startp[paren]) != -1 &&
703 (t1 = rx->endp[paren]) != -1)
713 if (RX_MATCH_UTF8(rx) && is_utf8_string((U8*)s, i))
718 if (RX_MATCH_TAINTED(rx)) {
719 MAGIC* mg = SvMAGIC(sv);
722 SvMAGIC(sv) = mg->mg_moremagic;
724 if ((mgt = SvMAGIC(sv))) {
725 mg->mg_moremagic = mgt;
735 sv_setsv(sv,&PL_sv_undef);
738 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
739 paren = rx->lastparen;
743 sv_setsv(sv,&PL_sv_undef);
745 case '\016': /* ^N */
746 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
747 paren = rx->lastcloseparen;
751 sv_setsv(sv,&PL_sv_undef);
754 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
755 if ((s = rx->subbeg) && rx->startp[0] != -1) {
760 sv_setsv(sv,&PL_sv_undef);
763 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
764 if (rx->subbeg && rx->endp[0] != -1) {
765 s = rx->subbeg + rx->endp[0];
766 i = rx->sublen - rx->endp[0];
770 sv_setsv(sv,&PL_sv_undef);
774 if (GvIO(PL_last_in_gv)) {
775 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
781 sv_setiv(sv, (IV)STATUS_CURRENT);
782 #ifdef COMPLEX_STATUS
783 LvTARGOFF(sv) = PL_statusvalue;
784 LvTARGLEN(sv) = PL_statusvalue_vms;
789 s = IoTOP_NAME(GvIOp(PL_defoutgv));
793 sv_setpv(sv,GvENAME(PL_defoutgv));
798 s = IoFMT_NAME(GvIOp(PL_defoutgv));
800 s = GvENAME(PL_defoutgv);
805 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
808 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
811 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
819 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
822 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
828 sv_copypv(sv, PL_ors_sv);
831 sv_setpv(sv,PL_ofmt);
835 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
836 sv_setpv(sv, errno ? Strerror(errno) : "");
839 int saveerrno = errno;
840 sv_setnv(sv, (NV)errno);
842 if (errno == errno_isOS2 || errno == errno_isOS2_set)
843 sv_setpv(sv, os2error(Perl_rc));
846 sv_setpv(sv, errno ? Strerror(errno) : "");
850 SvNOK_on(sv); /* what a wonderful hack! */
853 sv_setiv(sv, (IV)PL_uid);
856 sv_setiv(sv, (IV)PL_euid);
859 sv_setiv(sv, (IV)PL_gid);
861 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
865 sv_setiv(sv, (IV)PL_egid);
867 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
872 Groups_t gary[NGROUPS];
873 i = getgroups(NGROUPS,gary);
875 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
878 (void)SvIOK_on(sv); /* what a wonderful hack! */
882 #ifndef MACOS_TRADITIONAL
886 #ifdef USE_5005THREADS
888 sv_setsv(sv, thr->errsv);
890 #endif /* USE_5005THREADS */
896 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
898 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
900 if (uf && uf->uf_val)
901 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
906 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
916 #ifdef DYNAMIC_ENV_FETCH
917 /* We just undefd an environment var. Is a replacement */
918 /* waiting in the wings? */
921 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
922 s = SvPV(*valp, len);
926 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
927 /* And you'll never guess what the dog had */
928 /* in its mouth... */
930 MgTAINTEDDIR_off(mg);
932 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
933 char pathbuf[256], eltbuf[256], *cp, *elt = s;
937 do { /* DCL$PATH may be a search list */
938 while (1) { /* as may dev portion of any element */
939 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
940 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
941 cando_by_name(S_IWUSR,0,elt) ) {
946 if ((cp = strchr(elt, ':')) != Nullch)
948 if (my_trnlnm(elt, eltbuf, j++))
954 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
957 if (s && klen == 4 && strEQ(ptr,"PATH")) {
958 char *strend = s + len;
964 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
967 if (i >= sizeof tmpbuf /* too long -- assume the worst */
969 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
976 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
982 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
985 my_setenv(MgPV(mg,n_a),Nullch);
990 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
993 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
998 magic_clear_all_env(sv,mg);
999 hv_iterinit((HV*)sv);
1000 while ((entry = hv_iternext((HV*)sv))) {
1002 my_setenv(hv_iterkey(entry, &keylen),
1003 SvPV(hv_iterval((HV*)sv, entry), n_a));
1011 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1013 #if defined(VMS) || defined(EPOC)
1014 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1016 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1019 # ifdef USE_ENVIRON_ARRAY
1020 # if defined(USE_ITHREADS)
1021 /* only the parent thread can clobber the process environment */
1022 if (PL_curinterp == aTHX)
1025 # ifndef PERL_USE_SAFE_PUTENV
1028 if (environ == PL_origenviron)
1029 environ = (char**)safesysmalloc(sizeof(char*));
1031 for (i = 0; environ[i]; i++)
1032 safesysfree(environ[i]);
1033 # endif /* PERL_USE_SAFE_PUTENV */
1035 environ[0] = Nullch;
1037 # endif /* USE_ENVIRON_ARRAY */
1038 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1039 #endif /* VMS || EPC */
1043 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1044 static int sig_handlers_initted = 0;
1046 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1047 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1049 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1050 static int sig_defaulting[SIG_SIZE];
1054 #ifdef HAS_SIGPROCMASK
1056 restore_sigmask(pTHX_ SV *save_sv)
1058 sigset_t *ossetp = (sigset_t *) SvPV_nolen( save_sv );
1059 (void)sigprocmask(SIG_SETMASK, ossetp, (sigset_t *)0);
1063 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1067 /* Are we fetching a signal entry? */
1068 i = whichsig(MgPV(mg,n_a));
1071 sv_setsv(sv,PL_psig_ptr[i]);
1073 Sighandler_t sigstate;
1074 sigstate = rsignal_state(i);
1075 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1076 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1078 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1079 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1081 /* cache state so we don't fetch it again */
1082 if(sigstate == SIG_IGN)
1083 sv_setpv(sv,"IGNORE");
1085 sv_setsv(sv,&PL_sv_undef);
1086 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1093 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1095 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1096 * refactoring might be in order.
1104 if (strEQ(s,"__DIE__"))
1106 else if (strEQ(s,"__WARN__"))
1109 Perl_croak(aTHX_ "No such hook: %s", s);
1113 SvREFCNT_dec(to_dec);
1118 /* Are we clearing a signal entry? */
1121 #ifdef HAS_SIGPROCMASK
1124 /* Avoid having the signal arrive at a bad time, if possible. */
1127 sigprocmask(SIG_BLOCK, &set, &save);
1129 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1130 SAVEFREESV(save_sv);
1131 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1134 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1135 if (!sig_handlers_initted) Perl_csighandler_init();
1137 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1138 sig_defaulting[i] = 1;
1139 (void)rsignal(i, &Perl_csighandler);
1141 (void)rsignal(i, SIG_DFL);
1143 if(PL_psig_name[i]) {
1144 SvREFCNT_dec(PL_psig_name[i]);
1147 if(PL_psig_ptr[i]) {
1148 to_dec=PL_psig_ptr[i];
1151 SvREFCNT_dec(to_dec);
1161 Perl_raise_signal(pTHX_ int sig)
1163 /* Set a flag to say this signal is pending */
1164 PL_psig_pend[sig]++;
1165 /* And one to say _a_ signal is pending */
1170 Perl_csighandler(int sig)
1172 #ifdef PERL_GET_SIG_CONTEXT
1173 dTHXa(PERL_GET_SIG_CONTEXT);
1177 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1178 (void) rsignal(sig, &Perl_csighandler);
1179 if (sig_ignoring[sig]) return;
1181 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1182 if (sig_defaulting[sig])
1183 #ifdef KILL_BY_SIGPRC
1184 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1189 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
1190 /* Call the perl level handler now--
1191 * with risk we may be in malloc() etc. */
1192 (*PL_sighandlerp)(sig);
1194 Perl_raise_signal(aTHX_ sig);
1197 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1199 Perl_csighandler_init(void)
1202 if (sig_handlers_initted) return;
1204 for (sig = 1; sig < SIG_SIZE; sig++) {
1205 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1207 sig_defaulting[sig] = 1;
1208 (void) rsignal(sig, &Perl_csighandler);
1210 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1211 sig_ignoring[sig] = 0;
1214 sig_handlers_initted = 1;
1219 Perl_despatch_signals(pTHX)
1223 for (sig = 1; sig < SIG_SIZE; sig++) {
1224 if (PL_psig_pend[sig]) {
1225 PERL_BLOCKSIG_ADD(set, sig);
1226 PL_psig_pend[sig] = 0;
1227 PERL_BLOCKSIG_BLOCK(set);
1228 (*PL_sighandlerp)(sig);
1229 PERL_BLOCKSIG_UNBLOCK(set);
1235 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1240 /* Need to be careful with SvREFCNT_dec(), because that can have side
1241 * effects (due to closures). We must make sure that the new disposition
1242 * is in place before it is called.
1246 #ifdef HAS_SIGPROCMASK
1253 if (strEQ(s,"__DIE__"))
1255 else if (strEQ(s,"__WARN__"))
1258 Perl_croak(aTHX_ "No such hook: %s", s);
1266 i = whichsig(s); /* ...no, a brick */
1268 if (ckWARN(WARN_SIGNAL))
1269 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1272 #ifdef HAS_SIGPROCMASK
1273 /* Avoid having the signal arrive at a bad time, if possible. */
1276 sigprocmask(SIG_BLOCK, &set, &save);
1278 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1279 SAVEFREESV(save_sv);
1280 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1283 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1284 if (!sig_handlers_initted) Perl_csighandler_init();
1286 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1287 sig_ignoring[i] = 0;
1289 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1290 sig_defaulting[i] = 0;
1292 SvREFCNT_dec(PL_psig_name[i]);
1293 to_dec = PL_psig_ptr[i];
1294 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1295 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1296 PL_psig_name[i] = newSVpvn(s, len);
1297 SvREADONLY_on(PL_psig_name[i]);
1299 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1301 (void)rsignal(i, &Perl_csighandler);
1302 #ifdef HAS_SIGPROCMASK
1307 *svp = SvREFCNT_inc(sv);
1309 SvREFCNT_dec(to_dec);
1312 s = SvPV_force(sv,len);
1313 if (strEQ(s,"IGNORE")) {
1315 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1316 sig_ignoring[i] = 1;
1317 (void)rsignal(i, &Perl_csighandler);
1319 (void)rsignal(i, SIG_IGN);
1323 else if (strEQ(s,"DEFAULT") || !*s) {
1325 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1327 sig_defaulting[i] = 1;
1328 (void)rsignal(i, &Perl_csighandler);
1331 (void)rsignal(i, SIG_DFL);
1336 * We should warn if HINT_STRICT_REFS, but without
1337 * access to a known hint bit in a known OP, we can't
1338 * tell whether HINT_STRICT_REFS is in force or not.
1340 if (!strchr(s,':') && !strchr(s,'\''))
1341 sv_insert(sv, 0, 0, "main::", 6);
1343 (void)rsignal(i, &Perl_csighandler);
1345 *svp = SvREFCNT_inc(sv);
1347 #ifdef HAS_SIGPROCMASK
1352 SvREFCNT_dec(to_dec);
1355 #endif /* !PERL_MICRO */
1358 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1360 PL_sub_generation++;
1365 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1367 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1368 PL_amagic_generation++;
1374 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1376 HV *hv = (HV*)LvTARG(sv);
1380 (void) hv_iterinit(hv);
1381 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1384 while (hv_iternext(hv))
1389 sv_setiv(sv, (IV)i);
1394 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1397 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1402 /* caller is responsible for stack switching/cleanup */
1404 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1410 PUSHs(SvTIED_obj(sv, mg));
1413 if (mg->mg_len >= 0)
1414 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1415 else if (mg->mg_len == HEf_SVKEY)
1416 PUSHs((SV*)mg->mg_ptr);
1418 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1419 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1427 return call_method(meth, flags);
1431 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1437 PUSHSTACKi(PERLSI_MAGIC);
1439 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1440 sv_setsv(sv, *PL_stack_sp--);
1450 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1452 magic_methpack(sv,mg,"FETCH");
1454 mg->mg_flags |= MGf_GSKIP;
1459 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1463 PUSHSTACKi(PERLSI_MAGIC);
1464 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1471 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1473 return magic_methpack(sv,mg,"DELETE");
1478 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1485 PUSHSTACKi(PERLSI_MAGIC);
1486 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1487 sv = *PL_stack_sp--;
1488 retval = (U32) SvIV(sv)-1;
1497 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1502 PUSHSTACKi(PERLSI_MAGIC);
1504 XPUSHs(SvTIED_obj(sv, mg));
1506 call_method("CLEAR", G_SCALAR|G_DISCARD);
1513 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1516 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1520 PUSHSTACKi(PERLSI_MAGIC);
1523 PUSHs(SvTIED_obj(sv, mg));
1528 if (call_method(meth, G_SCALAR))
1529 sv_setsv(key, *PL_stack_sp--);
1538 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1540 return magic_methpack(sv,mg,"EXISTS");
1544 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1554 svp = av_fetch(GvAV(gv),
1555 atoi(MgPV(mg,n_a)), FALSE);
1556 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp)))) {
1557 /* set or clear breakpoint in the relevant control op */
1559 o->op_flags |= OPf_SPECIAL;
1561 o->op_flags &= ~OPf_SPECIAL;
1567 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1569 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1574 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1576 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1581 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1583 SV* lsv = LvTARG(sv);
1585 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1586 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1587 if (mg && mg->mg_len >= 0) {
1590 sv_pos_b2u(lsv, &i);
1591 sv_setiv(sv, i + PL_curcop->cop_arybase);
1600 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1602 SV* lsv = LvTARG(sv);
1609 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1610 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1614 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1615 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1617 else if (!SvOK(sv)) {
1621 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1623 pos = SvIV(sv) - PL_curcop->cop_arybase;
1626 ulen = sv_len_utf8(lsv);
1636 else if (pos > (SSize_t)len)
1641 sv_pos_u2b(lsv, &p, 0);
1646 mg->mg_flags &= ~MGf_MINMATCH;
1652 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1654 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1656 gv_efullname3(sv,((GV*)sv), "*");
1660 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1665 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1674 if (*s == '*' && s[1])
1676 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1681 GvGP(sv) = gp_ref(GvGP(gv));
1686 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1689 SV *lsv = LvTARG(sv);
1690 char *tmps = SvPV(lsv,len);
1691 I32 offs = LvTARGOFF(sv);
1692 I32 rem = LvTARGLEN(sv);
1695 sv_pos_u2b(lsv, &offs, &rem);
1696 if (offs > (I32)len)
1698 if (rem + offs > (I32)len)
1700 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1707 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1710 char *tmps = SvPV(sv, len);
1711 SV *lsv = LvTARG(sv);
1712 I32 lvoff = LvTARGOFF(sv);
1713 I32 lvlen = LvTARGLEN(sv);
1716 sv_utf8_upgrade(lsv);
1717 sv_pos_u2b(lsv, &lvoff, &lvlen);
1718 sv_insert(lsv, lvoff, lvlen, tmps, len);
1721 else if (lsv && SvUTF8(lsv)) {
1722 sv_pos_u2b(lsv, &lvoff, &lvlen);
1723 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1724 sv_insert(lsv, lvoff, lvlen, tmps, len);
1728 sv_insert(lsv, lvoff, lvlen, tmps, len);
1734 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1736 TAINT_IF((mg->mg_len & 1) ||
1737 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1742 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1744 if (PL_localizing) {
1745 if (PL_localizing == 1)
1750 else if (PL_tainted)
1758 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1760 SV *lsv = LvTARG(sv);
1767 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1772 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1774 do_vecset(sv); /* XXX slurp this routine */
1779 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1782 if (LvTARGLEN(sv)) {
1784 SV *ahv = LvTARG(sv);
1785 if (SvTYPE(ahv) == SVt_PVHV) {
1786 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1791 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1797 AV* av = (AV*)LvTARG(sv);
1798 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1799 targ = AvARRAY(av)[LvTARGOFF(sv)];
1801 if (targ && targ != &PL_sv_undef) {
1802 /* somebody else defined it for us */
1803 SvREFCNT_dec(LvTARG(sv));
1804 LvTARG(sv) = SvREFCNT_inc(targ);
1806 SvREFCNT_dec(mg->mg_obj);
1807 mg->mg_obj = Nullsv;
1808 mg->mg_flags &= ~MGf_REFCOUNTED;
1813 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1818 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1823 sv_setsv(LvTARG(sv), sv);
1824 SvSETMAGIC(LvTARG(sv));
1830 Perl_vivify_defelem(pTHX_ SV *sv)
1835 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1838 SV *ahv = LvTARG(sv);
1840 if (SvTYPE(ahv) == SVt_PVHV) {
1841 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1846 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1850 if (!value || value == &PL_sv_undef)
1851 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1854 AV* av = (AV*)LvTARG(sv);
1855 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1856 LvTARG(sv) = Nullsv; /* array can't be extended */
1858 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1859 if (!svp || (value = *svp) == &PL_sv_undef)
1860 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1863 (void)SvREFCNT_inc(value);
1864 SvREFCNT_dec(LvTARG(sv));
1867 SvREFCNT_dec(mg->mg_obj);
1868 mg->mg_obj = Nullsv;
1869 mg->mg_flags &= ~MGf_REFCOUNTED;
1873 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1875 AV *av = (AV*)mg->mg_obj;
1876 SV **svp = AvARRAY(av);
1877 I32 i = AvFILLp(av);
1879 if (svp[i] && svp[i] != &PL_sv_undef) {
1880 if (!SvWEAKREF(svp[i]))
1881 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1882 /* XXX Should we check that it hasn't changed? */
1884 (void)SvOK_off(svp[i]);
1885 SvWEAKREF_off(svp[i]);
1886 svp[i] = &PL_sv_undef;
1894 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1902 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1904 sv_unmagic(sv, PERL_MAGIC_bm);
1910 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1912 sv_unmagic(sv, PERL_MAGIC_fm);
1918 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1920 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1922 if (uf && uf->uf_set)
1923 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1928 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
1930 sv_unmagic(sv, PERL_MAGIC_qr);
1935 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1937 regexp *re = (regexp *)mg->mg_obj;
1942 #ifdef USE_LOCALE_COLLATE
1944 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1947 * RenE<eacute> Descartes said "I think not."
1948 * and vanished with a faint plop.
1951 Safefree(mg->mg_ptr);
1957 #endif /* USE_LOCALE_COLLATE */
1959 /* Just clear the UTF-8 cache data. */
1961 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
1963 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
1965 mg->mg_len = -1; /* The mg_len holds the len cache. */
1970 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1975 switch (*mg->mg_ptr) {
1976 case '\001': /* ^A */
1977 sv_setsv(PL_bodytarget, sv);
1979 case '\003': /* ^C */
1980 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1983 case '\004': /* ^D */
1984 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1985 DEBUG_x(dump_all());
1987 case '\005': /* ^E */
1988 if (*(mg->mg_ptr+1) == '\0') {
1989 #ifdef MACOS_TRADITIONAL
1990 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1993 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1996 SetLastError( SvIV(sv) );
1999 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2001 /* will anyone ever use this? */
2002 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
2008 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2010 SvREFCNT_dec(PL_encoding);
2011 if (SvOK(sv) || SvGMAGICAL(sv)) {
2012 PL_encoding = newSVsv(sv);
2015 PL_encoding = Nullsv;
2019 case '\006': /* ^F */
2020 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2022 case '\010': /* ^H */
2023 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2025 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2027 Safefree(PL_inplace);
2029 PL_inplace = savepv(SvPV(sv,len));
2031 PL_inplace = Nullch;
2033 case '\017': /* ^O */
2034 if (*(mg->mg_ptr+1) == '\0') {
2036 Safefree(PL_osname);
2038 PL_osname = savepv(SvPV(sv,len));
2042 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2043 if (!PL_compiling.cop_io)
2044 PL_compiling.cop_io = newSVsv(sv);
2046 sv_setsv(PL_compiling.cop_io,sv);
2049 case '\020': /* ^P */
2050 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2051 if (PL_perldb && !PL_DBsingle)
2054 case '\024': /* ^T */
2056 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2058 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2061 case '\027': /* ^W & $^WARNING_BITS */
2062 if (*(mg->mg_ptr+1) == '\0') {
2063 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2064 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2065 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2066 | (i ? G_WARN_ON : G_WARN_OFF) ;
2069 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2070 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2071 if (!SvPOK(sv) && PL_localizing) {
2072 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2073 PL_compiling.cop_warnings = pWARN_NONE;
2078 int accumulate = 0 ;
2079 int any_fatals = 0 ;
2080 char * ptr = (char*)SvPV(sv, len) ;
2081 for (i = 0 ; i < len ; ++i) {
2082 accumulate |= ptr[i] ;
2083 any_fatals |= (ptr[i] & 0xAA) ;
2086 PL_compiling.cop_warnings = pWARN_NONE;
2087 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
2088 PL_compiling.cop_warnings = pWARN_ALL;
2089 PL_dowarn |= G_WARN_ONCE ;
2092 if (specialWARN(PL_compiling.cop_warnings))
2093 PL_compiling.cop_warnings = newSVsv(sv) ;
2095 sv_setsv(PL_compiling.cop_warnings, sv);
2096 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2097 PL_dowarn |= G_WARN_ONCE ;
2105 if (PL_localizing) {
2106 if (PL_localizing == 1)
2107 SAVESPTR(PL_last_in_gv);
2109 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2110 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2113 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2114 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
2115 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
2118 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2119 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
2120 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
2123 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2126 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2127 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2128 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2131 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2135 IO *io = GvIOp(PL_defoutgv);
2138 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2139 IoFLAGS(io) &= ~IOf_FLUSH;
2141 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2142 PerlIO *ofp = IoOFP(io);
2144 (void)PerlIO_flush(ofp);
2145 IoFLAGS(io) |= IOf_FLUSH;
2151 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2152 PL_multiline = (i != 0);
2155 SvREFCNT_dec(PL_rs);
2156 PL_rs = newSVsv(sv);
2160 SvREFCNT_dec(PL_ors_sv);
2161 if (SvOK(sv) || SvGMAGICAL(sv)) {
2162 PL_ors_sv = newSVsv(sv);
2170 SvREFCNT_dec(PL_ofs_sv);
2171 if (SvOK(sv) || SvGMAGICAL(sv)) {
2172 PL_ofs_sv = newSVsv(sv);
2181 PL_ofmt = savepv(SvPV(sv,len));
2184 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2187 #ifdef COMPLEX_STATUS
2188 if (PL_localizing == 2) {
2189 PL_statusvalue = LvTARGOFF(sv);
2190 PL_statusvalue_vms = LvTARGLEN(sv);
2194 #ifdef VMSISH_STATUS
2196 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2199 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2204 # define PERL_VMS_BANG vaxc$errno
2206 # define PERL_VMS_BANG 0
2208 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2209 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2213 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2214 if (PL_delaymagic) {
2215 PL_delaymagic |= DM_RUID;
2216 break; /* don't do magic till later */
2219 (void)setruid((Uid_t)PL_uid);
2222 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2224 #ifdef HAS_SETRESUID
2225 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2227 if (PL_uid == PL_euid) /* special case $< = $> */
2228 (void)PerlProc_setuid(PL_uid);
2230 PL_uid = PerlProc_getuid();
2231 Perl_croak(aTHX_ "setruid() not implemented");
2236 PL_uid = PerlProc_getuid();
2237 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2240 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2241 if (PL_delaymagic) {
2242 PL_delaymagic |= DM_EUID;
2243 break; /* don't do magic till later */
2246 (void)seteuid((Uid_t)PL_euid);
2249 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2251 #ifdef HAS_SETRESUID
2252 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2254 if (PL_euid == PL_uid) /* special case $> = $< */
2255 PerlProc_setuid(PL_euid);
2257 PL_euid = PerlProc_geteuid();
2258 Perl_croak(aTHX_ "seteuid() not implemented");
2263 PL_euid = PerlProc_geteuid();
2264 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2267 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2268 if (PL_delaymagic) {
2269 PL_delaymagic |= DM_RGID;
2270 break; /* don't do magic till later */
2273 (void)setrgid((Gid_t)PL_gid);
2276 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2278 #ifdef HAS_SETRESGID
2279 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2281 if (PL_gid == PL_egid) /* special case $( = $) */
2282 (void)PerlProc_setgid(PL_gid);
2284 PL_gid = PerlProc_getgid();
2285 Perl_croak(aTHX_ "setrgid() not implemented");
2290 PL_gid = PerlProc_getgid();
2291 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2294 #ifdef HAS_SETGROUPS
2296 char *p = SvPV(sv, len);
2297 Groups_t gary[NGROUPS];
2302 for (i = 0; i < NGROUPS; ++i) {
2303 while (*p && !isSPACE(*p))
2312 (void)setgroups(i, gary);
2314 #else /* HAS_SETGROUPS */
2315 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2316 #endif /* HAS_SETGROUPS */
2317 if (PL_delaymagic) {
2318 PL_delaymagic |= DM_EGID;
2319 break; /* don't do magic till later */
2322 (void)setegid((Gid_t)PL_egid);
2325 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2327 #ifdef HAS_SETRESGID
2328 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2330 if (PL_egid == PL_gid) /* special case $) = $( */
2331 (void)PerlProc_setgid(PL_egid);
2333 PL_egid = PerlProc_getegid();
2334 Perl_croak(aTHX_ "setegid() not implemented");
2339 PL_egid = PerlProc_getegid();
2340 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2343 PL_chopset = SvPV_force(sv,len);
2345 #ifndef MACOS_TRADITIONAL
2347 LOCK_DOLLARZERO_MUTEX;
2348 #ifdef HAS_SETPROCTITLE
2349 /* The BSDs don't show the argv[] in ps(1) output, they
2350 * show a string from the process struct and provide
2351 * the setproctitle() routine to manipulate that. */
2354 # if __FreeBSD_version > 410001
2355 /* The leading "-" removes the "perl: " prefix,
2356 * but not the "(perl) suffix from the ps(1)
2357 * output, because that's what ps(1) shows if the
2358 * argv[] is modified. */
2359 setproctitle("-%s", s);
2360 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2361 /* This doesn't really work if you assume that
2362 * $0 = 'foobar'; will wipe out 'perl' from the $0
2363 * because in ps(1) output the result will be like
2364 * sprintf("perl: %s (perl)", s)
2365 * I guess this is a security feature:
2366 * one (a user process) cannot get rid of the original name.
2368 setproctitle("%s", s);
2372 #if defined(__hpux) && defined(PSTAT_SETCMD)
2377 pstat(PSTAT_SETCMD, un, len, 0, 0);
2383 /* See if all the arguments are contiguous in memory */
2384 for (i = 1; i < PL_origargc; i++) {
2385 if (PL_origargv[i] == s + 1
2387 || PL_origargv[i] == s + 2
2392 s += strlen(s); /* this one is ok too */
2397 /* can grab env area too? */
2400 && PL_curinterp == aTHX
2402 && (PL_origenviron[0] == s + 1))
2404 my_setenv("NoNe SuCh", Nullch);
2405 /* force copy of environment */
2406 for (i = 0; PL_origenviron[i]; i++)
2407 if (PL_origenviron[i] == s + 1) {
2414 PL_origalen = s - PL_origargv[0];
2416 s = SvPV_force(sv,len);
2418 if (i >= (I32)PL_origalen) {
2420 /* don't allow system to limit $0 seen by script */
2421 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2422 Copy(s, PL_origargv[0], i, char);
2423 s = PL_origargv[0]+i;
2427 Copy(s, PL_origargv[0], i, char);
2428 s = PL_origargv[0]+i;
2430 while (++i < (I32)PL_origalen)
2432 for (i = 1; i < PL_origargc; i++)
2433 PL_origargv[i] = Nullch;
2435 UNLOCK_DOLLARZERO_MUTEX;
2438 #ifdef USE_5005THREADS
2440 sv_setsv(thr->errsv, sv);
2442 #endif /* USE_5005THREADS */
2447 #ifdef USE_5005THREADS
2449 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2451 DEBUG_S(PerlIO_printf(Perl_debug_log,
2452 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2453 PTR2UV(thr), PTR2UV(sv)));
2455 Perl_croak(aTHX_ "panic: magic_mutexfree");
2456 MUTEX_DESTROY(MgMUTEXP(mg));
2457 COND_DESTROY(MgCONDP(mg));
2460 #endif /* USE_5005THREADS */
2463 Perl_whichsig(pTHX_ char *sig)
2465 register char **sigv;
2467 for (sigv = PL_sig_name+1; *sigv; sigv++)
2468 if (strEQ(sig,*sigv))
2469 return PL_sig_num[sigv - PL_sig_name];
2471 if (strEQ(sig,"CHLD"))
2475 if (strEQ(sig,"CLD"))
2481 #if !defined(PERL_IMPLICIT_CONTEXT)
2486 Perl_sighandler(int sig)
2488 #ifdef PERL_GET_SIG_CONTEXT
2489 dTHXa(PERL_GET_SIG_CONTEXT);
2496 SV *sv = Nullsv, *tSv = PL_Sv;
2502 if (PL_savestack_ix + 15 <= PL_savestack_max)
2504 if (PL_markstack_ptr < PL_markstack_max - 2)
2506 if (PL_retstack_ix < PL_retstack_max - 2)
2508 if (PL_scopestack_ix < PL_scopestack_max - 3)
2511 if (!PL_psig_ptr[sig]) {
2512 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2517 /* Max number of items pushed there is 3*n or 4. We cannot fix
2518 infinity, so we fix 4 (in fact 5): */
2520 PL_savestack_ix += 5; /* Protect save in progress. */
2521 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2524 PL_markstack_ptr++; /* Protect mark. */
2527 PL_retstack[PL_retstack_ix] = NULL;
2530 PL_scopestack_ix += 1;
2531 /* sv_2cv is too complicated, try a simpler variant first: */
2532 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2533 || SvTYPE(cv) != SVt_PVCV)
2534 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2536 if (!cv || !CvROOT(cv)) {
2537 if (ckWARN(WARN_SIGNAL))
2538 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2539 PL_sig_name[sig], (gv ? GvENAME(gv)
2546 if(PL_psig_name[sig]) {
2547 sv = SvREFCNT_inc(PL_psig_name[sig]);
2549 #if !defined(PERL_IMPLICIT_CONTEXT)
2553 sv = sv_newmortal();
2554 sv_setpv(sv,PL_sig_name[sig]);
2557 PUSHSTACKi(PERLSI_SIGNAL);
2562 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2565 if (SvTRUE(ERRSV)) {
2567 #ifdef HAS_SIGPROCMASK
2568 /* Handler "died", for example to get out of a restart-able read().
2569 * Before we re-do that on its behalf re-enable the signal which was
2570 * blocked by the system when we entered.
2574 sigaddset(&set,sig);
2575 sigprocmask(SIG_UNBLOCK, &set, NULL);
2577 /* Not clear if this will work */
2578 (void)rsignal(sig, SIG_IGN);
2579 (void)rsignal(sig, &Perl_csighandler);
2581 #endif /* !PERL_MICRO */
2582 Perl_die(aTHX_ Nullformat);
2586 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2592 PL_scopestack_ix -= 1;
2595 PL_op = myop; /* Apparently not needed... */
2597 PL_Sv = tSv; /* Restore global temporaries. */
2604 restore_magic(pTHX_ void *p)
2606 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2607 SV* sv = mgs->mgs_sv;
2612 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2615 SvFLAGS(sv) |= mgs->mgs_flags;
2619 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2622 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2624 /* If we're still on top of the stack, pop us off. (That condition
2625 * will be satisfied if restore_magic was called explicitly, but *not*
2626 * if it's being called via leave_scope.)
2627 * The reason for doing this is that otherwise, things like sv_2cv()
2628 * may leave alloc gunk on the savestack, and some code
2629 * (e.g. sighandler) doesn't expect that...
2631 if (PL_savestack_ix == mgs->mgs_ss_ix)
2633 I32 popval = SSPOPINT;
2634 assert(popval == SAVEt_DESTRUCTOR_X);
2635 PL_savestack_ix -= 2;
2637 assert(popval == SAVEt_ALLOC);
2639 PL_savestack_ix -= popval;
2645 unwind_handler_stack(pTHX_ void *p)
2647 U32 flags = *(U32*)p;
2650 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2651 /* cxstack_ix-- Not needed, die already unwound it. */
2652 #if !defined(PERL_IMPLICIT_CONTEXT)
2654 SvREFCNT_dec(sig_sv);