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));
64 #ifdef PERL_COPY_ON_WRITE
65 /* Turning READONLY off for a copy-on-write scalar is a bad idea. */
70 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
72 mgs = SSPTR(mgs_ix, MGS*);
74 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
75 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
79 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
83 =for apidoc mg_magical
85 Turns on the magical status of an SV. See C<sv_magic>.
91 Perl_mg_magical(pTHX_ SV *sv)
94 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
95 MGVTBL* vtbl = mg->mg_virtual;
97 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
101 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
110 Do magic after a value is retrieved from the SV. See C<sv_magic>.
116 Perl_mg_get(pTHX_ SV *sv)
119 MAGIC *newmg, *head, *cur, *mg;
120 I32 mgs_ix = SSNEW(sizeof(MGS));
122 save_magic(mgs_ix, sv);
124 /* We must call svt_get(sv, mg) for each valid entry in the linked
125 list of magic. svt_get() may delete the current entry, add new
126 magic to the head of the list, or upgrade the SV. AMS 20010810 */
128 newmg = cur = head = mg = SvMAGIC(sv);
130 MGVTBL *vtbl = mg->mg_virtual;
132 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
133 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
134 /* Don't restore the flags for this entry if it was deleted. */
135 if (mg->mg_flags & MGf_GSKIP)
136 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
139 mg = mg->mg_moremagic;
142 /* Have we finished with the new entries we saw? Start again
143 where we left off (unless there are more new entries). */
151 /* Were any new entries added? */
152 if (!new && (newmg = SvMAGIC(sv)) != head) {
159 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
166 Do magic after a value is assigned to the SV. See C<sv_magic>.
172 Perl_mg_set(pTHX_ SV *sv)
178 mgs_ix = SSNEW(sizeof(MGS));
179 save_magic(mgs_ix, sv);
181 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
182 MGVTBL* vtbl = mg->mg_virtual;
183 nextmg = mg->mg_moremagic; /* it may delete itself */
184 if (mg->mg_flags & MGf_GSKIP) {
185 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
186 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
188 if (vtbl && vtbl->svt_set)
189 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
192 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
197 =for apidoc mg_length
199 Report on the SV's length. See C<sv_magic>.
205 Perl_mg_length(pTHX_ SV *sv)
210 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
211 MGVTBL* vtbl = mg->mg_virtual;
212 if (vtbl && vtbl->svt_len) {
215 mgs_ix = SSNEW(sizeof(MGS));
216 save_magic(mgs_ix, sv);
217 /* omit MGf_GSKIP -- not changed here */
218 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
219 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
226 U8 *s = (U8*)SvPV(sv, len);
227 len = Perl_utf8_length(aTHX_ s, s + len);
235 Perl_mg_size(pTHX_ SV *sv)
240 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
241 MGVTBL* vtbl = mg->mg_virtual;
242 if (vtbl && vtbl->svt_len) {
245 mgs_ix = SSNEW(sizeof(MGS));
246 save_magic(mgs_ix, sv);
247 /* omit MGf_GSKIP -- not changed here */
248 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
249 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
256 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
261 Perl_croak(aTHX_ "Size magic not implemented");
270 Clear something magical that the SV represents. See C<sv_magic>.
276 Perl_mg_clear(pTHX_ SV *sv)
281 mgs_ix = SSNEW(sizeof(MGS));
282 save_magic(mgs_ix, sv);
284 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
285 MGVTBL* vtbl = mg->mg_virtual;
286 /* omit GSKIP -- never set here */
288 if (vtbl && vtbl->svt_clear)
289 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
292 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
299 Finds the magic pointer for type matching the SV. See C<sv_magic>.
305 Perl_mg_find(pTHX_ SV *sv, int type)
310 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
311 if (mg->mg_type == type)
320 Copies the magic from one SV to another. See C<sv_magic>.
326 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
330 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
331 MGVTBL* vtbl = mg->mg_virtual;
332 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
333 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
335 else if (isUPPER(mg->mg_type)) {
337 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
338 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
340 toLOWER(mg->mg_type), key, klen);
350 Free any magic storage used by the SV. See C<sv_magic>.
356 Perl_mg_free(pTHX_ SV *sv)
360 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
361 MGVTBL* vtbl = mg->mg_virtual;
362 moremagic = mg->mg_moremagic;
363 if (vtbl && vtbl->svt_free)
364 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
365 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
367 Safefree(mg->mg_ptr);
368 else if (mg->mg_len == HEf_SVKEY)
369 SvREFCNT_dec((SV*)mg->mg_ptr);
371 if (mg->mg_flags & MGf_REFCOUNTED)
372 SvREFCNT_dec(mg->mg_obj);
380 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
385 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
389 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
390 if (mg->mg_obj) /* @+ */
393 return rx->lastparen;
400 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
408 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
412 if (paren <= (I32)rx->nparens &&
413 (s = rx->startp[paren]) != -1 &&
414 (t = rx->endp[paren]) != -1)
416 if (mg->mg_obj) /* @+ */
421 if (i > 0 && PL_reg_match_utf8) {
422 char *b = rx->subbeg;
424 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
434 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
436 Perl_croak(aTHX_ PL_no_modify);
442 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
449 switch (*mg->mg_ptr) {
450 case '1': case '2': case '3': case '4':
451 case '5': case '6': case '7': case '8': case '9': case '&':
452 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
454 paren = atoi(mg->mg_ptr); /* $& is in [0] */
456 if (paren <= (I32)rx->nparens &&
457 (s1 = rx->startp[paren]) != -1 &&
458 (t1 = rx->endp[paren]) != -1)
462 if (i > 0 && PL_reg_match_utf8) {
463 char *s = rx->subbeg + s1;
464 char *send = rx->subbeg + t1;
467 if (is_utf8_string((U8*)s, i))
468 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
471 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
475 if (ckWARN(WARN_UNINITIALIZED))
480 if (ckWARN(WARN_UNINITIALIZED))
485 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
486 paren = rx->lastparen;
491 case '\016': /* ^N */
492 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
493 paren = rx->lastcloseparen;
499 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
500 if (rx->startp[0] != -1) {
511 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
512 if (rx->endp[0] != -1) {
513 i = rx->sublen - rx->endp[0];
524 if (!SvPOK(sv) && SvNIOK(sv)) {
534 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
541 switch (*mg->mg_ptr) {
542 case '\001': /* ^A */
543 sv_setsv(sv, PL_bodytarget);
545 case '\003': /* ^C */
546 sv_setiv(sv, (IV)PL_minus_c);
549 case '\004': /* ^D */
550 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
551 #if defined(YYDEBUG) && defined(DEBUGGING)
552 PL_yydebug = DEBUG_p_TEST;
555 case '\005': /* ^E */
556 if (*(mg->mg_ptr+1) == '\0') {
557 #ifdef MACOS_TRADITIONAL
561 sv_setnv(sv,(double)gMacPerl_OSErr);
562 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
567 # include <descrip.h>
568 # include <starlet.h>
570 $DESCRIPTOR(msgdsc,msg);
571 sv_setnv(sv,(NV) vaxc$errno);
572 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
573 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
579 if (!(_emx_env & 0x200)) { /* Under DOS */
580 sv_setnv(sv, (NV)errno);
581 sv_setpv(sv, errno ? Strerror(errno) : "");
583 if (errno != errno_isOS2) {
584 int tmp = _syserrno();
585 if (tmp) /* 2nd call to _syserrno() makes it 0 */
588 sv_setnv(sv, (NV)Perl_rc);
589 sv_setpv(sv, os2error(Perl_rc));
594 DWORD dwErr = GetLastError();
595 sv_setnv(sv, (NV)dwErr);
598 PerlProc_GetOSError(sv, dwErr);
605 sv_setnv(sv, (NV)errno);
606 sv_setpv(sv, errno ? Strerror(errno) : "");
611 SvNOK_on(sv); /* what a wonderful hack! */
613 else if (strEQ(mg->mg_ptr+1, "NCODING"))
614 sv_setsv(sv, PL_encoding);
616 case '\006': /* ^F */
617 sv_setiv(sv, (IV)PL_maxsysfd);
619 case '\010': /* ^H */
620 sv_setiv(sv, (IV)PL_hints);
622 case '\011': /* ^I */ /* NOT \t in EBCDIC */
624 sv_setpv(sv, PL_inplace);
626 sv_setsv(sv, &PL_sv_undef);
628 case '\017': /* ^O & ^OPEN */
629 if (*(mg->mg_ptr+1) == '\0')
630 sv_setpv(sv, PL_osname);
631 else if (strEQ(mg->mg_ptr, "\017PEN")) {
632 if (!PL_compiling.cop_io)
633 sv_setsv(sv, &PL_sv_undef);
635 sv_setsv(sv, PL_compiling.cop_io);
639 case '\020': /* ^P */
640 sv_setiv(sv, (IV)PL_perldb);
642 case '\023': /* ^S */
644 if (PL_lex_state != LEX_NOTPARSING)
647 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
652 case '\024': /* ^T */
653 if (*(mg->mg_ptr+1) == '\0') {
655 sv_setnv(sv, PL_basetime);
657 sv_setiv(sv, (IV)PL_basetime);
660 else if (strEQ(mg->mg_ptr, "\024AINT"))
661 sv_setiv(sv, PL_tainting
662 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
665 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
666 if (*(mg->mg_ptr+1) == '\0')
667 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
668 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
669 if (PL_compiling.cop_warnings == pWARN_NONE ||
670 PL_compiling.cop_warnings == pWARN_STD)
672 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
674 else if (PL_compiling.cop_warnings == pWARN_ALL) {
675 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
678 sv_setsv(sv, PL_compiling.cop_warnings);
682 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
683 sv_setiv(sv, (IV)PL_widesyscalls);
685 case '1': case '2': case '3': case '4':
686 case '5': case '6': case '7': case '8': case '9': case '&':
687 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
691 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
692 * XXX Does the new way break anything?
694 paren = atoi(mg->mg_ptr); /* $& is in [0] */
696 if (paren <= (I32)rx->nparens &&
697 (s1 = rx->startp[paren]) != -1 &&
698 (t1 = rx->endp[paren]) != -1)
708 if (PL_reg_match_utf8 && is_utf8_string((U8*)s, i))
713 if (RX_MATCH_TAINTED(rx)) {
714 MAGIC* mg = SvMAGIC(sv);
717 SvMAGIC(sv) = mg->mg_moremagic;
719 if ((mgt = SvMAGIC(sv))) {
720 mg->mg_moremagic = mgt;
730 sv_setsv(sv,&PL_sv_undef);
733 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
734 paren = rx->lastparen;
738 sv_setsv(sv,&PL_sv_undef);
740 case '\016': /* ^N */
741 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
742 paren = rx->lastcloseparen;
746 sv_setsv(sv,&PL_sv_undef);
749 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
750 if ((s = rx->subbeg) && rx->startp[0] != -1) {
755 sv_setsv(sv,&PL_sv_undef);
758 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
759 if (rx->subbeg && rx->endp[0] != -1) {
760 s = rx->subbeg + rx->endp[0];
761 i = rx->sublen - rx->endp[0];
765 sv_setsv(sv,&PL_sv_undef);
769 if (GvIO(PL_last_in_gv)) {
770 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
776 sv_setiv(sv, (IV)STATUS_CURRENT);
777 #ifdef COMPLEX_STATUS
778 LvTARGOFF(sv) = PL_statusvalue;
779 LvTARGLEN(sv) = PL_statusvalue_vms;
784 s = IoTOP_NAME(GvIOp(PL_defoutgv));
788 sv_setpv(sv,GvENAME(PL_defoutgv));
793 s = IoFMT_NAME(GvIOp(PL_defoutgv));
795 s = GvENAME(PL_defoutgv);
800 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
803 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
806 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
814 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
817 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
823 sv_copypv(sv, PL_ors_sv);
826 sv_setpv(sv,PL_ofmt);
830 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
831 sv_setpv(sv, errno ? Strerror(errno) : "");
834 int saveerrno = errno;
835 sv_setnv(sv, (NV)errno);
837 if (errno == errno_isOS2 || errno == errno_isOS2_set)
838 sv_setpv(sv, os2error(Perl_rc));
841 sv_setpv(sv, errno ? Strerror(errno) : "");
845 SvNOK_on(sv); /* what a wonderful hack! */
848 sv_setiv(sv, (IV)PL_uid);
851 sv_setiv(sv, (IV)PL_euid);
854 sv_setiv(sv, (IV)PL_gid);
856 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
860 sv_setiv(sv, (IV)PL_egid);
862 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
867 Groups_t gary[NGROUPS];
868 i = getgroups(NGROUPS,gary);
870 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
873 (void)SvIOK_on(sv); /* what a wonderful hack! */
877 #ifndef MACOS_TRADITIONAL
886 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
888 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
890 if (uf && uf->uf_val)
891 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
896 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
906 #ifdef DYNAMIC_ENV_FETCH
907 /* We just undefd an environment var. Is a replacement */
908 /* waiting in the wings? */
911 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
912 s = SvPV(*valp, len);
916 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
917 /* And you'll never guess what the dog had */
918 /* in its mouth... */
920 MgTAINTEDDIR_off(mg);
922 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
923 char pathbuf[256], eltbuf[256], *cp, *elt = s;
927 do { /* DCL$PATH may be a search list */
928 while (1) { /* as may dev portion of any element */
929 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
930 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
931 cando_by_name(S_IWUSR,0,elt) ) {
936 if ((cp = strchr(elt, ':')) != Nullch)
938 if (my_trnlnm(elt, eltbuf, j++))
944 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
947 if (s && klen == 4 && strEQ(ptr,"PATH")) {
948 char *strend = s + len;
954 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
957 if (i >= sizeof tmpbuf /* too long -- assume the worst */
959 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
966 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
972 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
975 my_setenv(MgPV(mg,n_a),Nullch);
980 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
983 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
988 magic_clear_all_env(sv,mg);
989 hv_iterinit((HV*)sv);
990 while ((entry = hv_iternext((HV*)sv))) {
992 my_setenv(hv_iterkey(entry, &keylen),
993 SvPV(hv_iterval((HV*)sv, entry), n_a));
1001 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1003 #if defined(VMS) || defined(EPOC)
1004 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1006 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1009 # ifdef USE_ENVIRON_ARRAY
1010 # if defined(USE_ITHREADS)
1011 /* only the parent thread can clobber the process environment */
1012 if (PL_curinterp == aTHX)
1015 # ifndef PERL_USE_SAFE_PUTENV
1018 if (environ == PL_origenviron)
1019 environ = (char**)safesysmalloc(sizeof(char*));
1021 for (i = 0; environ[i]; i++)
1022 safesysfree(environ[i]);
1023 # endif /* PERL_USE_SAFE_PUTENV */
1025 environ[0] = Nullch;
1027 # endif /* USE_ENVIRON_ARRAY */
1028 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1029 #endif /* VMS || EPC */
1033 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1034 static int sig_handlers_initted = 0;
1036 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1037 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1039 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1040 static int sig_defaulting[SIG_SIZE];
1045 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1049 /* Are we fetching a signal entry? */
1050 i = whichsig(MgPV(mg,n_a));
1053 sv_setsv(sv,PL_psig_ptr[i]);
1055 Sighandler_t sigstate;
1056 sigstate = rsignal_state(i);
1057 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1058 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1060 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1061 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1063 /* cache state so we don't fetch it again */
1064 if(sigstate == SIG_IGN)
1065 sv_setpv(sv,"IGNORE");
1067 sv_setsv(sv,&PL_sv_undef);
1068 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1075 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1079 /* Are we clearing a signal entry? */
1080 i = whichsig(MgPV(mg,n_a));
1082 if(PL_psig_ptr[i]) {
1083 SvREFCNT_dec(PL_psig_ptr[i]);
1086 if(PL_psig_name[i]) {
1087 SvREFCNT_dec(PL_psig_name[i]);
1095 Perl_raise_signal(pTHX_ int sig)
1097 /* Set a flag to say this signal is pending */
1098 PL_psig_pend[sig]++;
1099 /* And one to say _a_ signal is pending */
1104 Perl_csighandler(int sig)
1106 #ifdef PERL_GET_SIG_CONTEXT
1107 dTHXa(PERL_GET_SIG_CONTEXT);
1111 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1112 (void) rsignal(sig, &Perl_csighandler);
1113 if (sig_ignoring[sig]) return;
1115 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1116 if (sig_defaulting[sig])
1117 #ifdef KILL_BY_SIGPRC
1118 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1124 #ifdef PERL_OLD_SIGNALS
1125 /* Call the perl level handler now with risk we may be in malloc() etc. */
1126 (*PL_sighandlerp)(sig);
1128 Perl_raise_signal(aTHX_ sig);
1132 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1134 Perl_csighandler_init(void)
1137 if (sig_handlers_initted) return;
1139 for (sig = 1; sig < SIG_SIZE; sig++) {
1140 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1142 sig_defaulting[sig] = 1;
1143 (void) rsignal(sig, &Perl_csighandler);
1145 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1146 sig_ignoring[sig] = 0;
1149 sig_handlers_initted = 1;
1154 Perl_despatch_signals(pTHX)
1158 for (sig = 1; sig < SIG_SIZE; sig++) {
1159 if (PL_psig_pend[sig]) {
1160 PL_psig_pend[sig] = 0;
1161 (*PL_sighandlerp)(sig);
1167 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1176 if (strEQ(s,"__DIE__"))
1178 else if (strEQ(s,"__WARN__"))
1181 Perl_croak(aTHX_ "No such hook: %s", s);
1189 i = whichsig(s); /* ...no, a brick */
1191 if (ckWARN(WARN_SIGNAL))
1192 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1195 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1196 if (!sig_handlers_initted) Perl_csighandler_init();
1198 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1199 sig_ignoring[i] = 0;
1201 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1202 sig_defaulting[i] = 0;
1204 SvREFCNT_dec(PL_psig_name[i]);
1205 SvREFCNT_dec(PL_psig_ptr[i]);
1206 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1207 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1208 PL_psig_name[i] = newSVpvn(s, len);
1209 SvREADONLY_on(PL_psig_name[i]);
1211 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1213 (void)rsignal(i, &Perl_csighandler);
1215 *svp = SvREFCNT_inc(sv);
1218 s = SvPV_force(sv,len);
1219 if (strEQ(s,"IGNORE")) {
1221 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1222 sig_ignoring[i] = 1;
1223 (void)rsignal(i, &Perl_csighandler);
1225 (void)rsignal(i, SIG_IGN);
1230 else if (strEQ(s,"DEFAULT") || !*s) {
1232 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1234 sig_defaulting[i] = 1;
1235 (void)rsignal(i, &Perl_csighandler);
1238 (void)rsignal(i, SIG_DFL);
1245 * We should warn if HINT_STRICT_REFS, but without
1246 * access to a known hint bit in a known OP, we can't
1247 * tell whether HINT_STRICT_REFS is in force or not.
1249 if (!strchr(s,':') && !strchr(s,'\''))
1250 sv_insert(sv, 0, 0, "main::", 6);
1252 (void)rsignal(i, &Perl_csighandler);
1254 *svp = SvREFCNT_inc(sv);
1258 #endif /* !PERL_MICRO */
1261 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1263 PL_sub_generation++;
1268 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1270 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1271 PL_amagic_generation++;
1277 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1279 HV *hv = (HV*)LvTARG(sv);
1283 (void) hv_iterinit(hv);
1284 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1287 while (hv_iternext(hv))
1292 sv_setiv(sv, (IV)i);
1297 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1300 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1305 /* caller is responsible for stack switching/cleanup */
1307 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1313 PUSHs(SvTIED_obj(sv, mg));
1316 if (mg->mg_len >= 0)
1317 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1318 else if (mg->mg_len == HEf_SVKEY)
1319 PUSHs((SV*)mg->mg_ptr);
1321 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1322 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1330 return call_method(meth, flags);
1334 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1340 PUSHSTACKi(PERLSI_MAGIC);
1342 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1343 sv_setsv(sv, *PL_stack_sp--);
1353 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1355 magic_methpack(sv,mg,"FETCH");
1357 mg->mg_flags |= MGf_GSKIP;
1362 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1366 PUSHSTACKi(PERLSI_MAGIC);
1367 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1374 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1376 return magic_methpack(sv,mg,"DELETE");
1381 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1388 PUSHSTACKi(PERLSI_MAGIC);
1389 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1390 sv = *PL_stack_sp--;
1391 retval = (U32) SvIV(sv)-1;
1400 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1405 PUSHSTACKi(PERLSI_MAGIC);
1407 XPUSHs(SvTIED_obj(sv, mg));
1409 call_method("CLEAR", G_SCALAR|G_DISCARD);
1416 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1419 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1423 PUSHSTACKi(PERLSI_MAGIC);
1426 PUSHs(SvTIED_obj(sv, mg));
1431 if (call_method(meth, G_SCALAR))
1432 sv_setsv(key, *PL_stack_sp--);
1441 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1443 return magic_methpack(sv,mg,"EXISTS");
1447 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1457 svp = av_fetch(GvAV(gv),
1458 atoi(MgPV(mg,n_a)), FALSE);
1459 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1460 o->op_private = (U8)i;
1465 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1467 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1472 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1474 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1479 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1481 SV* lsv = LvTARG(sv);
1483 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1484 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1485 if (mg && mg->mg_len >= 0) {
1488 sv_pos_b2u(lsv, &i);
1489 sv_setiv(sv, i + PL_curcop->cop_arybase);
1498 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1500 SV* lsv = LvTARG(sv);
1507 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1508 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1512 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1513 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1515 else if (!SvOK(sv)) {
1519 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1521 pos = SvIV(sv) - PL_curcop->cop_arybase;
1524 ulen = sv_len_utf8(lsv);
1534 else if (pos > (SSize_t)len)
1539 sv_pos_u2b(lsv, &p, 0);
1544 mg->mg_flags &= ~MGf_MINMATCH;
1550 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1552 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1554 gv_efullname3(sv,((GV*)sv), "*");
1558 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1563 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1572 if (*s == '*' && s[1])
1574 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1579 GvGP(sv) = gp_ref(GvGP(gv));
1584 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1587 SV *lsv = LvTARG(sv);
1588 char *tmps = SvPV(lsv,len);
1589 I32 offs = LvTARGOFF(sv);
1590 I32 rem = LvTARGLEN(sv);
1593 sv_pos_u2b(lsv, &offs, &rem);
1594 if (offs > (I32)len)
1596 if (rem + offs > (I32)len)
1598 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1605 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1608 char *tmps = SvPV(sv, len);
1609 SV *lsv = LvTARG(sv);
1610 I32 lvoff = LvTARGOFF(sv);
1611 I32 lvlen = LvTARGLEN(sv);
1614 sv_utf8_upgrade(lsv);
1615 sv_pos_u2b(lsv, &lvoff, &lvlen);
1616 sv_insert(lsv, lvoff, lvlen, tmps, len);
1619 else if (lsv && SvUTF8(lsv)) {
1620 sv_pos_u2b(lsv, &lvoff, &lvlen);
1621 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1622 sv_insert(lsv, lvoff, lvlen, tmps, len);
1626 sv_insert(lsv, lvoff, lvlen, tmps, len);
1632 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1634 TAINT_IF((mg->mg_len & 1) ||
1635 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1640 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1642 if (PL_localizing) {
1643 if (PL_localizing == 1)
1648 else if (PL_tainted)
1656 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1658 SV *lsv = LvTARG(sv);
1665 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1670 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1672 do_vecset(sv); /* XXX slurp this routine */
1677 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1680 if (LvTARGLEN(sv)) {
1682 SV *ahv = LvTARG(sv);
1683 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1688 AV* av = (AV*)LvTARG(sv);
1689 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1690 targ = AvARRAY(av)[LvTARGOFF(sv)];
1692 if (targ && targ != &PL_sv_undef) {
1693 /* somebody else defined it for us */
1694 SvREFCNT_dec(LvTARG(sv));
1695 LvTARG(sv) = SvREFCNT_inc(targ);
1697 SvREFCNT_dec(mg->mg_obj);
1698 mg->mg_obj = Nullsv;
1699 mg->mg_flags &= ~MGf_REFCOUNTED;
1704 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1709 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1714 sv_setsv(LvTARG(sv), sv);
1715 SvSETMAGIC(LvTARG(sv));
1721 Perl_vivify_defelem(pTHX_ SV *sv)
1726 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1729 SV *ahv = LvTARG(sv);
1731 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1734 if (!value || value == &PL_sv_undef)
1735 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1738 AV* av = (AV*)LvTARG(sv);
1739 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1740 LvTARG(sv) = Nullsv; /* array can't be extended */
1742 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1743 if (!svp || (value = *svp) == &PL_sv_undef)
1744 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1747 (void)SvREFCNT_inc(value);
1748 SvREFCNT_dec(LvTARG(sv));
1751 SvREFCNT_dec(mg->mg_obj);
1752 mg->mg_obj = Nullsv;
1753 mg->mg_flags &= ~MGf_REFCOUNTED;
1757 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1759 AV *av = (AV*)mg->mg_obj;
1760 SV **svp = AvARRAY(av);
1761 I32 i = AvFILLp(av);
1763 if (svp[i] && svp[i] != &PL_sv_undef) {
1764 if (!SvWEAKREF(svp[i]))
1765 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1766 /* XXX Should we check that it hasn't changed? */
1768 (void)SvOK_off(svp[i]);
1769 SvWEAKREF_off(svp[i]);
1770 svp[i] = &PL_sv_undef;
1778 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1786 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1788 sv_unmagic(sv, PERL_MAGIC_bm);
1794 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1796 sv_unmagic(sv, PERL_MAGIC_fm);
1802 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1804 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1806 if (uf && uf->uf_set)
1807 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1812 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1814 regexp *re = (regexp *)mg->mg_obj;
1819 #ifdef USE_LOCALE_COLLATE
1821 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1824 * RenE<eacute> Descartes said "I think not."
1825 * and vanished with a faint plop.
1828 Safefree(mg->mg_ptr);
1834 #endif /* USE_LOCALE_COLLATE */
1837 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1842 switch (*mg->mg_ptr) {
1843 case '\001': /* ^A */
1844 sv_setsv(PL_bodytarget, sv);
1846 case '\003': /* ^C */
1847 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1850 case '\004': /* ^D */
1851 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1852 DEBUG_x(dump_all());
1854 case '\005': /* ^E */
1855 if (*(mg->mg_ptr+1) == '\0') {
1856 #ifdef MACOS_TRADITIONAL
1857 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1860 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1863 SetLastError( SvIV(sv) );
1866 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1868 /* will anyone ever use this? */
1869 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1875 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
1877 SvREFCNT_dec(PL_encoding);
1878 if (SvOK(sv) || SvGMAGICAL(sv)) {
1879 PL_encoding = newSVsv(sv);
1882 PL_encoding = Nullsv;
1886 case '\006': /* ^F */
1887 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1889 case '\010': /* ^H */
1890 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1892 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1894 Safefree(PL_inplace);
1896 PL_inplace = savepv(SvPV(sv,len));
1898 PL_inplace = Nullch;
1900 case '\017': /* ^O */
1901 if (*(mg->mg_ptr+1) == '\0') {
1903 Safefree(PL_osname);
1905 PL_osname = savepv(SvPV(sv,len));
1909 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1910 if (!PL_compiling.cop_io)
1911 PL_compiling.cop_io = newSVsv(sv);
1913 sv_setsv(PL_compiling.cop_io,sv);
1916 case '\020': /* ^P */
1917 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1918 if (PL_perldb && !PL_DBsingle)
1921 case '\024': /* ^T */
1923 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1925 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1928 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1929 if (*(mg->mg_ptr+1) == '\0') {
1930 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1931 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1932 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1933 | (i ? G_WARN_ON : G_WARN_OFF) ;
1936 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
1937 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1938 if (!SvPOK(sv) && PL_localizing) {
1939 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1940 PL_compiling.cop_warnings = pWARN_NONE;
1945 int accumulate = 0 ;
1946 int any_fatals = 0 ;
1947 char * ptr = (char*)SvPV(sv, len) ;
1948 for (i = 0 ; i < len ; ++i) {
1949 accumulate |= ptr[i] ;
1950 any_fatals |= (ptr[i] & 0xAA) ;
1953 PL_compiling.cop_warnings = pWARN_NONE;
1954 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1955 PL_compiling.cop_warnings = pWARN_ALL;
1956 PL_dowarn |= G_WARN_ONCE ;
1959 if (specialWARN(PL_compiling.cop_warnings))
1960 PL_compiling.cop_warnings = newSVsv(sv) ;
1962 sv_setsv(PL_compiling.cop_warnings, sv);
1963 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1964 PL_dowarn |= G_WARN_ONCE ;
1970 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
1971 PL_widesyscalls = (bool)SvTRUE(sv);
1974 if (PL_localizing) {
1975 if (PL_localizing == 1)
1976 SAVESPTR(PL_last_in_gv);
1978 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1979 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
1982 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1983 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1984 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1987 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1988 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1989 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1992 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1995 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1996 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1997 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2000 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2004 IO *io = GvIOp(PL_defoutgv);
2007 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2008 IoFLAGS(io) &= ~IOf_FLUSH;
2010 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2011 PerlIO *ofp = IoOFP(io);
2013 (void)PerlIO_flush(ofp);
2014 IoFLAGS(io) |= IOf_FLUSH;
2020 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2021 PL_multiline = (i != 0);
2024 SvREFCNT_dec(PL_rs);
2025 PL_rs = newSVsv(sv);
2029 SvREFCNT_dec(PL_ors_sv);
2030 if (SvOK(sv) || SvGMAGICAL(sv)) {
2031 PL_ors_sv = newSVsv(sv);
2039 SvREFCNT_dec(PL_ofs_sv);
2040 if (SvOK(sv) || SvGMAGICAL(sv)) {
2041 PL_ofs_sv = newSVsv(sv);
2050 PL_ofmt = savepv(SvPV(sv,len));
2053 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2056 #ifdef COMPLEX_STATUS
2057 if (PL_localizing == 2) {
2058 PL_statusvalue = LvTARGOFF(sv);
2059 PL_statusvalue_vms = LvTARGLEN(sv);
2063 #ifdef VMSISH_STATUS
2065 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2068 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2073 # define PERL_VMS_BANG vaxc$errno
2075 # define PERL_VMS_BANG 0
2077 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2078 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2082 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2083 if (PL_delaymagic) {
2084 PL_delaymagic |= DM_RUID;
2085 break; /* don't do magic till later */
2088 (void)setruid((Uid_t)PL_uid);
2091 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2093 #ifdef HAS_SETRESUID
2094 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2096 if (PL_uid == PL_euid) /* special case $< = $> */
2097 (void)PerlProc_setuid(PL_uid);
2099 PL_uid = PerlProc_getuid();
2100 Perl_croak(aTHX_ "setruid() not implemented");
2105 PL_uid = PerlProc_getuid();
2106 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2109 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2110 if (PL_delaymagic) {
2111 PL_delaymagic |= DM_EUID;
2112 break; /* don't do magic till later */
2115 (void)seteuid((Uid_t)PL_euid);
2118 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2120 #ifdef HAS_SETRESUID
2121 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2123 if (PL_euid == PL_uid) /* special case $> = $< */
2124 PerlProc_setuid(PL_euid);
2126 PL_euid = PerlProc_geteuid();
2127 Perl_croak(aTHX_ "seteuid() not implemented");
2132 PL_euid = PerlProc_geteuid();
2133 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2136 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2137 if (PL_delaymagic) {
2138 PL_delaymagic |= DM_RGID;
2139 break; /* don't do magic till later */
2142 (void)setrgid((Gid_t)PL_gid);
2145 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2147 #ifdef HAS_SETRESGID
2148 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2150 if (PL_gid == PL_egid) /* special case $( = $) */
2151 (void)PerlProc_setgid(PL_gid);
2153 PL_gid = PerlProc_getgid();
2154 Perl_croak(aTHX_ "setrgid() not implemented");
2159 PL_gid = PerlProc_getgid();
2160 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2163 #ifdef HAS_SETGROUPS
2165 char *p = SvPV(sv, len);
2166 Groups_t gary[NGROUPS];
2171 for (i = 0; i < NGROUPS; ++i) {
2172 while (*p && !isSPACE(*p))
2181 (void)setgroups(i, gary);
2183 #else /* HAS_SETGROUPS */
2184 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2185 #endif /* HAS_SETGROUPS */
2186 if (PL_delaymagic) {
2187 PL_delaymagic |= DM_EGID;
2188 break; /* don't do magic till later */
2191 (void)setegid((Gid_t)PL_egid);
2194 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2196 #ifdef HAS_SETRESGID
2197 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2199 if (PL_egid == PL_gid) /* special case $) = $( */
2200 (void)PerlProc_setgid(PL_egid);
2202 PL_egid = PerlProc_getegid();
2203 Perl_croak(aTHX_ "setegid() not implemented");
2208 PL_egid = PerlProc_getegid();
2209 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2212 PL_chopset = SvPV_force(sv,len);
2214 #ifndef MACOS_TRADITIONAL
2216 LOCK_DOLLARZERO_MUTEX;
2217 #ifdef HAS_SETPROCTITLE
2218 /* The BSDs don't show the argv[] in ps(1) output, they
2219 * show a string from the process struct and provide
2220 * the setproctitle() routine to manipulate that. */
2223 # if __FreeBSD_version > 410001
2224 /* The leading "-" removes the "perl: " prefix,
2225 * but not the "(perl) suffix from the ps(1)
2226 * output, because that's what ps(1) shows if the
2227 * argv[] is modified. */
2228 setproctitle("-%s", s);
2229 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2230 /* This doesn't really work if you assume that
2231 * $0 = 'foobar'; will wipe out 'perl' from the $0
2232 * because in ps(1) output the result will be like
2233 * sprintf("perl: %s (perl)", s)
2234 * I guess this is a security feature:
2235 * one (a user process) cannot get rid of the original name.
2237 setproctitle("%s", s);
2241 #if defined(__hpux) && defined(PSTAT_SETCMD)
2246 pstat(PSTAT_SETCMD, un, len, 0, 0);
2252 /* See if all the arguments are contiguous in memory */
2253 for (i = 1; i < PL_origargc; i++) {
2254 if (PL_origargv[i] == s + 1
2256 || PL_origargv[i] == s + 2
2261 s += strlen(s); /* this one is ok too */
2266 /* can grab env area too? */
2269 && PL_curinterp == aTHX
2271 && (PL_origenviron[0] == s + 1))
2273 my_setenv("NoNe SuCh", Nullch);
2274 /* force copy of environment */
2275 for (i = 0; PL_origenviron[i]; i++)
2276 if (PL_origenviron[i] == s + 1) {
2283 PL_origalen = s - PL_origargv[0];
2285 s = SvPV_force(sv,len);
2287 if (i >= (I32)PL_origalen) {
2289 /* don't allow system to limit $0 seen by script */
2290 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2291 Copy(s, PL_origargv[0], i, char);
2292 s = PL_origargv[0]+i;
2296 Copy(s, PL_origargv[0], i, char);
2297 s = PL_origargv[0]+i;
2299 while (++i < (I32)PL_origalen)
2301 for (i = 1; i < PL_origargc; i++)
2302 PL_origargv[i] = Nullch;
2304 UNLOCK_DOLLARZERO_MUTEX;
2312 Perl_whichsig(pTHX_ char *sig)
2314 register char **sigv;
2316 for (sigv = PL_sig_name+1; *sigv; sigv++)
2317 if (strEQ(sig,*sigv))
2318 return PL_sig_num[sigv - PL_sig_name];
2320 if (strEQ(sig,"CHLD"))
2324 if (strEQ(sig,"CLD"))
2330 #if !defined(PERL_IMPLICIT_CONTEXT)
2335 Perl_sighandler(int sig)
2337 #ifdef PERL_GET_SIG_CONTEXT
2338 dTHXa(PERL_GET_SIG_CONTEXT);
2345 SV *sv = Nullsv, *tSv = PL_Sv;
2351 if (PL_savestack_ix + 15 <= PL_savestack_max)
2353 if (PL_markstack_ptr < PL_markstack_max - 2)
2355 if (PL_retstack_ix < PL_retstack_max - 2)
2357 if (PL_scopestack_ix < PL_scopestack_max - 3)
2360 if (!PL_psig_ptr[sig]) {
2361 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2366 /* Max number of items pushed there is 3*n or 4. We cannot fix
2367 infinity, so we fix 4 (in fact 5): */
2369 PL_savestack_ix += 5; /* Protect save in progress. */
2370 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2373 PL_markstack_ptr++; /* Protect mark. */
2376 PL_retstack[PL_retstack_ix] = NULL;
2379 PL_scopestack_ix += 1;
2380 /* sv_2cv is too complicated, try a simpler variant first: */
2381 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2382 || SvTYPE(cv) != SVt_PVCV)
2383 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2385 if (!cv || !CvROOT(cv)) {
2386 if (ckWARN(WARN_SIGNAL))
2387 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2388 PL_sig_name[sig], (gv ? GvENAME(gv)
2395 if(PL_psig_name[sig]) {
2396 sv = SvREFCNT_inc(PL_psig_name[sig]);
2398 #if !defined(PERL_IMPLICIT_CONTEXT)
2402 sv = sv_newmortal();
2403 sv_setpv(sv,PL_sig_name[sig]);
2406 PUSHSTACKi(PERLSI_SIGNAL);
2411 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2414 if (SvTRUE(ERRSV)) {
2416 #ifdef HAS_SIGPROCMASK
2417 /* Handler "died", for example to get out of a restart-able read().
2418 * Before we re-do that on its behalf re-enable the signal which was
2419 * blocked by the system when we entered.
2423 sigaddset(&set,sig);
2424 sigprocmask(SIG_UNBLOCK, &set, NULL);
2426 /* Not clear if this will work */
2427 (void)rsignal(sig, SIG_IGN);
2428 (void)rsignal(sig, &Perl_csighandler);
2430 #endif /* !PERL_MICRO */
2431 Perl_die(aTHX_ Nullformat);
2435 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2441 PL_scopestack_ix -= 1;
2444 PL_op = myop; /* Apparently not needed... */
2446 PL_Sv = tSv; /* Restore global temporaries. */
2453 restore_magic(pTHX_ void *p)
2455 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2456 SV* sv = mgs->mgs_sv;
2461 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2464 SvFLAGS(sv) |= mgs->mgs_flags;
2468 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2471 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2473 /* If we're still on top of the stack, pop us off. (That condition
2474 * will be satisfied if restore_magic was called explicitly, but *not*
2475 * if it's being called via leave_scope.)
2476 * The reason for doing this is that otherwise, things like sv_2cv()
2477 * may leave alloc gunk on the savestack, and some code
2478 * (e.g. sighandler) doesn't expect that...
2480 if (PL_savestack_ix == mgs->mgs_ss_ix)
2482 I32 popval = SSPOPINT;
2483 assert(popval == SAVEt_DESTRUCTOR_X);
2484 PL_savestack_ix -= 2;
2486 assert(popval == SAVEt_ALLOC);
2488 PL_savestack_ix -= popval;
2494 unwind_handler_stack(pTHX_ void *p)
2496 U32 flags = *(U32*)p;
2499 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2500 /* cxstack_ix-- Not needed, die already unwound it. */
2501 #if !defined(PERL_IMPLICIT_CONTEXT)
2503 SvREFCNT_dec(sig_sv);