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);
663 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
664 if (*(mg->mg_ptr+1) == '\0')
665 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
666 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
667 if (PL_compiling.cop_warnings == pWARN_NONE ||
668 PL_compiling.cop_warnings == pWARN_STD)
670 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
672 else if (PL_compiling.cop_warnings == pWARN_ALL) {
673 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
676 sv_setsv(sv, PL_compiling.cop_warnings);
680 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
681 sv_setiv(sv, (IV)PL_widesyscalls);
683 case '1': case '2': case '3': case '4':
684 case '5': case '6': case '7': case '8': case '9': case '&':
685 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
689 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
690 * XXX Does the new way break anything?
692 paren = atoi(mg->mg_ptr); /* $& is in [0] */
694 if (paren <= (I32)rx->nparens &&
695 (s1 = rx->startp[paren]) != -1 &&
696 (t1 = rx->endp[paren]) != -1)
706 if (PL_reg_match_utf8 && is_utf8_string((U8*)s, i))
711 if (RX_MATCH_TAINTED(rx)) {
712 MAGIC* mg = SvMAGIC(sv);
715 SvMAGIC(sv) = mg->mg_moremagic;
717 if ((mgt = SvMAGIC(sv))) {
718 mg->mg_moremagic = mgt;
728 sv_setsv(sv,&PL_sv_undef);
731 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
732 paren = rx->lastparen;
736 sv_setsv(sv,&PL_sv_undef);
738 case '\016': /* ^N */
739 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
740 paren = rx->lastcloseparen;
744 sv_setsv(sv,&PL_sv_undef);
747 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
748 if ((s = rx->subbeg) && rx->startp[0] != -1) {
753 sv_setsv(sv,&PL_sv_undef);
756 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
757 if (rx->subbeg && rx->endp[0] != -1) {
758 s = rx->subbeg + rx->endp[0];
759 i = rx->sublen - rx->endp[0];
763 sv_setsv(sv,&PL_sv_undef);
767 if (GvIO(PL_last_in_gv)) {
768 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
774 sv_setiv(sv, (IV)STATUS_CURRENT);
775 #ifdef COMPLEX_STATUS
776 LvTARGOFF(sv) = PL_statusvalue;
777 LvTARGLEN(sv) = PL_statusvalue_vms;
782 s = IoTOP_NAME(GvIOp(PL_defoutgv));
786 sv_setpv(sv,GvENAME(PL_defoutgv));
791 s = IoFMT_NAME(GvIOp(PL_defoutgv));
793 s = GvENAME(PL_defoutgv);
798 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
801 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
804 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
812 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
815 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
821 sv_setpv(sv,SvPVX(PL_ors_sv));
824 sv_setpv(sv,PL_ofmt);
828 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
829 sv_setpv(sv, errno ? Strerror(errno) : "");
832 int saveerrno = errno;
833 sv_setnv(sv, (NV)errno);
835 if (errno == errno_isOS2 || errno == errno_isOS2_set)
836 sv_setpv(sv, os2error(Perl_rc));
839 sv_setpv(sv, errno ? Strerror(errno) : "");
843 SvNOK_on(sv); /* what a wonderful hack! */
846 sv_setiv(sv, (IV)PL_uid);
849 sv_setiv(sv, (IV)PL_euid);
852 sv_setiv(sv, (IV)PL_gid);
854 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
858 sv_setiv(sv, (IV)PL_egid);
860 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
865 Groups_t gary[NGROUPS];
866 i = getgroups(NGROUPS,gary);
868 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
871 (void)SvIOK_on(sv); /* what a wonderful hack! */
875 #ifndef MACOS_TRADITIONAL
884 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
886 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
888 if (uf && uf->uf_val)
889 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
894 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
904 #ifdef DYNAMIC_ENV_FETCH
905 /* We just undefd an environment var. Is a replacement */
906 /* waiting in the wings? */
909 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
910 s = SvPV(*valp, len);
914 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
915 /* And you'll never guess what the dog had */
916 /* in its mouth... */
918 MgTAINTEDDIR_off(mg);
920 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
921 char pathbuf[256], eltbuf[256], *cp, *elt = s;
925 do { /* DCL$PATH may be a search list */
926 while (1) { /* as may dev portion of any element */
927 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
928 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
929 cando_by_name(S_IWUSR,0,elt) ) {
934 if ((cp = strchr(elt, ':')) != Nullch)
936 if (my_trnlnm(elt, eltbuf, j++))
942 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
945 if (s && klen == 4 && strEQ(ptr,"PATH")) {
946 char *strend = s + len;
952 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
955 if (i >= sizeof tmpbuf /* too long -- assume the worst */
957 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
964 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
970 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
973 my_setenv(MgPV(mg,n_a),Nullch);
978 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
981 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
986 magic_clear_all_env(sv,mg);
987 hv_iterinit((HV*)sv);
988 while ((entry = hv_iternext((HV*)sv))) {
990 my_setenv(hv_iterkey(entry, &keylen),
991 SvPV(hv_iterval((HV*)sv, entry), n_a));
999 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1001 #if defined(VMS) || defined(EPOC)
1002 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1004 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1007 # ifdef USE_ENVIRON_ARRAY
1008 # if defined(USE_ITHREADS)
1009 /* only the parent thread can clobber the process environment */
1010 if (PL_curinterp == aTHX)
1013 # ifndef PERL_USE_SAFE_PUTENV
1016 if (environ == PL_origenviron)
1017 environ = (char**)safesysmalloc(sizeof(char*));
1019 for (i = 0; environ[i]; i++)
1020 safesysfree(environ[i]);
1021 # endif /* PERL_USE_SAFE_PUTENV */
1023 environ[0] = Nullch;
1025 # endif /* USE_ENVIRON_ARRAY */
1026 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1027 #endif /* VMS || EPC */
1031 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1032 static int sig_handlers_initted = 0;
1034 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1035 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1037 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1038 static int sig_defaulting[SIG_SIZE];
1043 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1047 /* Are we fetching a signal entry? */
1048 i = whichsig(MgPV(mg,n_a));
1051 sv_setsv(sv,PL_psig_ptr[i]);
1053 Sighandler_t sigstate;
1054 sigstate = rsignal_state(i);
1055 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1056 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1058 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1059 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1061 /* cache state so we don't fetch it again */
1062 if(sigstate == SIG_IGN)
1063 sv_setpv(sv,"IGNORE");
1065 sv_setsv(sv,&PL_sv_undef);
1066 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1073 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1077 /* Are we clearing a signal entry? */
1078 i = whichsig(MgPV(mg,n_a));
1080 if(PL_psig_ptr[i]) {
1081 SvREFCNT_dec(PL_psig_ptr[i]);
1084 if(PL_psig_name[i]) {
1085 SvREFCNT_dec(PL_psig_name[i]);
1093 Perl_raise_signal(pTHX_ int sig)
1095 /* Set a flag to say this signal is pending */
1096 PL_psig_pend[sig]++;
1097 /* And one to say _a_ signal is pending */
1102 Perl_csighandler(int sig)
1104 #ifdef PERL_GET_SIG_CONTEXT
1105 dTHXa(PERL_GET_SIG_CONTEXT);
1109 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1110 (void) rsignal(sig, &Perl_csighandler);
1111 if (sig_ignoring[sig]) return;
1113 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1114 if (sig_defaulting[sig])
1115 #ifdef KILL_BY_SIGPRC
1116 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1122 #ifdef PERL_OLD_SIGNALS
1123 /* Call the perl level handler now with risk we may be in malloc() etc. */
1124 (*PL_sighandlerp)(sig);
1126 Perl_raise_signal(aTHX_ sig);
1130 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1132 Perl_csighandler_init(void)
1135 if (sig_handlers_initted) return;
1137 for (sig = 1; sig < SIG_SIZE; sig++) {
1138 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1140 sig_defaulting[sig] = 1;
1141 (void) rsignal(sig, &Perl_csighandler);
1143 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1144 sig_ignoring[sig] = 0;
1147 sig_handlers_initted = 1;
1152 Perl_despatch_signals(pTHX)
1156 for (sig = 1; sig < SIG_SIZE; sig++) {
1157 if (PL_psig_pend[sig]) {
1158 PL_psig_pend[sig] = 0;
1159 (*PL_sighandlerp)(sig);
1165 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1174 if (strEQ(s,"__DIE__"))
1176 else if (strEQ(s,"__WARN__"))
1179 Perl_croak(aTHX_ "No such hook: %s", s);
1187 i = whichsig(s); /* ...no, a brick */
1189 if (ckWARN(WARN_SIGNAL))
1190 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1193 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1194 if (!sig_handlers_initted) Perl_csighandler_init();
1196 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1197 sig_ignoring[i] = 0;
1199 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1200 sig_defaulting[i] = 0;
1202 SvREFCNT_dec(PL_psig_name[i]);
1203 SvREFCNT_dec(PL_psig_ptr[i]);
1204 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1205 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1206 PL_psig_name[i] = newSVpvn(s, len);
1207 SvREADONLY_on(PL_psig_name[i]);
1209 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1211 (void)rsignal(i, &Perl_csighandler);
1213 *svp = SvREFCNT_inc(sv);
1216 s = SvPV_force(sv,len);
1217 if (strEQ(s,"IGNORE")) {
1219 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1220 sig_ignoring[i] = 1;
1221 (void)rsignal(i, &Perl_csighandler);
1223 (void)rsignal(i, SIG_IGN);
1228 else if (strEQ(s,"DEFAULT") || !*s) {
1230 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1232 sig_defaulting[i] = 1;
1233 (void)rsignal(i, &Perl_csighandler);
1236 (void)rsignal(i, SIG_DFL);
1243 * We should warn if HINT_STRICT_REFS, but without
1244 * access to a known hint bit in a known OP, we can't
1245 * tell whether HINT_STRICT_REFS is in force or not.
1247 if (!strchr(s,':') && !strchr(s,'\''))
1248 sv_insert(sv, 0, 0, "main::", 6);
1250 (void)rsignal(i, &Perl_csighandler);
1252 *svp = SvREFCNT_inc(sv);
1256 #endif /* !PERL_MICRO */
1259 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1261 PL_sub_generation++;
1266 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1268 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1269 PL_amagic_generation++;
1275 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1277 HV *hv = (HV*)LvTARG(sv);
1281 (void) hv_iterinit(hv);
1282 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1285 while (hv_iternext(hv))
1290 sv_setiv(sv, (IV)i);
1295 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1298 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1303 /* caller is responsible for stack switching/cleanup */
1305 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1311 PUSHs(SvTIED_obj(sv, mg));
1314 if (mg->mg_len >= 0)
1315 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1316 else if (mg->mg_len == HEf_SVKEY)
1317 PUSHs((SV*)mg->mg_ptr);
1319 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1320 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1328 return call_method(meth, flags);
1332 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1338 PUSHSTACKi(PERLSI_MAGIC);
1340 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1341 sv_setsv(sv, *PL_stack_sp--);
1351 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1353 magic_methpack(sv,mg,"FETCH");
1355 mg->mg_flags |= MGf_GSKIP;
1360 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1364 PUSHSTACKi(PERLSI_MAGIC);
1365 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1372 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1374 return magic_methpack(sv,mg,"DELETE");
1379 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1386 PUSHSTACKi(PERLSI_MAGIC);
1387 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1388 sv = *PL_stack_sp--;
1389 retval = (U32) SvIV(sv)-1;
1398 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1403 PUSHSTACKi(PERLSI_MAGIC);
1405 XPUSHs(SvTIED_obj(sv, mg));
1407 call_method("CLEAR", G_SCALAR|G_DISCARD);
1414 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1417 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1421 PUSHSTACKi(PERLSI_MAGIC);
1424 PUSHs(SvTIED_obj(sv, mg));
1429 if (call_method(meth, G_SCALAR))
1430 sv_setsv(key, *PL_stack_sp--);
1439 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1441 return magic_methpack(sv,mg,"EXISTS");
1445 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1455 svp = av_fetch(GvAV(gv),
1456 atoi(MgPV(mg,n_a)), FALSE);
1457 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1458 o->op_private = (U8)i;
1463 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1465 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1470 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1472 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1477 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1479 SV* lsv = LvTARG(sv);
1481 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1482 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1483 if (mg && mg->mg_len >= 0) {
1486 sv_pos_b2u(lsv, &i);
1487 sv_setiv(sv, i + PL_curcop->cop_arybase);
1496 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1498 SV* lsv = LvTARG(sv);
1505 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1506 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1510 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1511 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1513 else if (!SvOK(sv)) {
1517 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1519 pos = SvIV(sv) - PL_curcop->cop_arybase;
1522 ulen = sv_len_utf8(lsv);
1532 else if (pos > (SSize_t)len)
1537 sv_pos_u2b(lsv, &p, 0);
1542 mg->mg_flags &= ~MGf_MINMATCH;
1548 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1550 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1552 gv_efullname3(sv,((GV*)sv), "*");
1556 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1561 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1570 if (*s == '*' && s[1])
1572 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1577 GvGP(sv) = gp_ref(GvGP(gv));
1582 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1585 SV *lsv = LvTARG(sv);
1586 char *tmps = SvPV(lsv,len);
1587 I32 offs = LvTARGOFF(sv);
1588 I32 rem = LvTARGLEN(sv);
1591 sv_pos_u2b(lsv, &offs, &rem);
1592 if (offs > (I32)len)
1594 if (rem + offs > (I32)len)
1596 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1603 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1606 char *tmps = SvPV(sv, len);
1607 SV *lsv = LvTARG(sv);
1608 I32 lvoff = LvTARGOFF(sv);
1609 I32 lvlen = LvTARGLEN(sv);
1612 sv_utf8_upgrade(lsv);
1613 sv_pos_u2b(lsv, &lvoff, &lvlen);
1614 sv_insert(lsv, lvoff, lvlen, tmps, len);
1617 else if (lsv && SvUTF8(lsv)) {
1618 sv_pos_u2b(lsv, &lvoff, &lvlen);
1619 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1620 sv_insert(lsv, lvoff, lvlen, tmps, len);
1624 sv_insert(lsv, lvoff, lvlen, tmps, len);
1630 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1632 TAINT_IF((mg->mg_len & 1) ||
1633 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1638 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1640 if (PL_localizing) {
1641 if (PL_localizing == 1)
1646 else if (PL_tainted)
1654 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1656 SV *lsv = LvTARG(sv);
1663 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1668 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1670 do_vecset(sv); /* XXX slurp this routine */
1675 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1678 if (LvTARGLEN(sv)) {
1680 SV *ahv = LvTARG(sv);
1681 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1686 AV* av = (AV*)LvTARG(sv);
1687 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1688 targ = AvARRAY(av)[LvTARGOFF(sv)];
1690 if (targ && targ != &PL_sv_undef) {
1691 /* somebody else defined it for us */
1692 SvREFCNT_dec(LvTARG(sv));
1693 LvTARG(sv) = SvREFCNT_inc(targ);
1695 SvREFCNT_dec(mg->mg_obj);
1696 mg->mg_obj = Nullsv;
1697 mg->mg_flags &= ~MGf_REFCOUNTED;
1702 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1707 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1712 sv_setsv(LvTARG(sv), sv);
1713 SvSETMAGIC(LvTARG(sv));
1719 Perl_vivify_defelem(pTHX_ SV *sv)
1724 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1727 SV *ahv = LvTARG(sv);
1729 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1732 if (!value || value == &PL_sv_undef)
1733 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1736 AV* av = (AV*)LvTARG(sv);
1737 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1738 LvTARG(sv) = Nullsv; /* array can't be extended */
1740 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1741 if (!svp || (value = *svp) == &PL_sv_undef)
1742 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1745 (void)SvREFCNT_inc(value);
1746 SvREFCNT_dec(LvTARG(sv));
1749 SvREFCNT_dec(mg->mg_obj);
1750 mg->mg_obj = Nullsv;
1751 mg->mg_flags &= ~MGf_REFCOUNTED;
1755 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1757 AV *av = (AV*)mg->mg_obj;
1758 SV **svp = AvARRAY(av);
1759 I32 i = AvFILLp(av);
1761 if (svp[i] && svp[i] != &PL_sv_undef) {
1762 if (!SvWEAKREF(svp[i]))
1763 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1764 /* XXX Should we check that it hasn't changed? */
1766 (void)SvOK_off(svp[i]);
1767 SvWEAKREF_off(svp[i]);
1768 svp[i] = &PL_sv_undef;
1776 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1784 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1786 sv_unmagic(sv, PERL_MAGIC_bm);
1792 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1794 sv_unmagic(sv, PERL_MAGIC_fm);
1800 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1802 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1804 if (uf && uf->uf_set)
1805 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1810 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1812 regexp *re = (regexp *)mg->mg_obj;
1817 #ifdef USE_LOCALE_COLLATE
1819 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1822 * RenE<eacute> Descartes said "I think not."
1823 * and vanished with a faint plop.
1826 Safefree(mg->mg_ptr);
1832 #endif /* USE_LOCALE_COLLATE */
1835 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1840 switch (*mg->mg_ptr) {
1841 case '\001': /* ^A */
1842 sv_setsv(PL_bodytarget, sv);
1844 case '\003': /* ^C */
1845 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1848 case '\004': /* ^D */
1849 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1850 DEBUG_x(dump_all());
1852 case '\005': /* ^E */
1853 if (*(mg->mg_ptr+1) == '\0') {
1854 #ifdef MACOS_TRADITIONAL
1855 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1858 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1861 SetLastError( SvIV(sv) );
1864 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1866 /* will anyone ever use this? */
1867 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1873 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
1875 SvREFCNT_dec(PL_encoding);
1876 if (SvOK(sv) || SvGMAGICAL(sv)) {
1877 PL_encoding = newSVsv(sv);
1880 PL_encoding = Nullsv;
1884 case '\006': /* ^F */
1885 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1887 case '\010': /* ^H */
1888 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1890 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1892 Safefree(PL_inplace);
1894 PL_inplace = savepv(SvPV(sv,len));
1896 PL_inplace = Nullch;
1898 case '\017': /* ^O */
1899 if (*(mg->mg_ptr+1) == '\0') {
1901 Safefree(PL_osname);
1903 PL_osname = savepv(SvPV(sv,len));
1907 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1908 if (!PL_compiling.cop_io)
1909 PL_compiling.cop_io = newSVsv(sv);
1911 sv_setsv(PL_compiling.cop_io,sv);
1914 case '\020': /* ^P */
1915 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1916 if (PL_perldb && !PL_DBsingle)
1919 case '\024': /* ^T */
1921 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1923 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1926 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1927 if (*(mg->mg_ptr+1) == '\0') {
1928 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1929 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1930 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1931 | (i ? G_WARN_ON : G_WARN_OFF) ;
1934 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
1935 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1936 if (!SvPOK(sv) && PL_localizing) {
1937 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1938 PL_compiling.cop_warnings = pWARN_NONE;
1943 int accumulate = 0 ;
1944 int any_fatals = 0 ;
1945 char * ptr = (char*)SvPV(sv, len) ;
1946 for (i = 0 ; i < len ; ++i) {
1947 accumulate |= ptr[i] ;
1948 any_fatals |= (ptr[i] & 0xAA) ;
1951 PL_compiling.cop_warnings = pWARN_NONE;
1952 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1953 PL_compiling.cop_warnings = pWARN_ALL;
1954 PL_dowarn |= G_WARN_ONCE ;
1957 if (specialWARN(PL_compiling.cop_warnings))
1958 PL_compiling.cop_warnings = newSVsv(sv) ;
1960 sv_setsv(PL_compiling.cop_warnings, sv);
1961 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1962 PL_dowarn |= G_WARN_ONCE ;
1968 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
1969 PL_widesyscalls = (bool)SvTRUE(sv);
1972 if (PL_localizing) {
1973 if (PL_localizing == 1)
1974 SAVESPTR(PL_last_in_gv);
1976 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1977 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
1980 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1981 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1982 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1985 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1986 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1987 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1990 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1993 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1994 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1995 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1998 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2002 IO *io = GvIOp(PL_defoutgv);
2005 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2006 IoFLAGS(io) &= ~IOf_FLUSH;
2008 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2009 PerlIO *ofp = IoOFP(io);
2011 (void)PerlIO_flush(ofp);
2012 IoFLAGS(io) |= IOf_FLUSH;
2018 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2019 PL_multiline = (i != 0);
2022 SvREFCNT_dec(PL_rs);
2023 PL_rs = newSVsv(sv);
2027 SvREFCNT_dec(PL_ors_sv);
2028 if (SvOK(sv) || SvGMAGICAL(sv)) {
2029 PL_ors_sv = newSVsv(sv);
2037 SvREFCNT_dec(PL_ofs_sv);
2038 if (SvOK(sv) || SvGMAGICAL(sv)) {
2039 PL_ofs_sv = newSVsv(sv);
2048 PL_ofmt = savepv(SvPV(sv,len));
2051 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2054 #ifdef COMPLEX_STATUS
2055 if (PL_localizing == 2) {
2056 PL_statusvalue = LvTARGOFF(sv);
2057 PL_statusvalue_vms = LvTARGLEN(sv);
2061 #ifdef VMSISH_STATUS
2063 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2066 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2071 # define PERL_VMS_BANG vaxc$errno
2073 # define PERL_VMS_BANG 0
2075 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2076 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2080 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2081 if (PL_delaymagic) {
2082 PL_delaymagic |= DM_RUID;
2083 break; /* don't do magic till later */
2086 (void)setruid((Uid_t)PL_uid);
2089 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2091 #ifdef HAS_SETRESUID
2092 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2094 if (PL_uid == PL_euid) /* special case $< = $> */
2095 (void)PerlProc_setuid(PL_uid);
2097 PL_uid = PerlProc_getuid();
2098 Perl_croak(aTHX_ "setruid() not implemented");
2103 PL_uid = PerlProc_getuid();
2104 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2107 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2108 if (PL_delaymagic) {
2109 PL_delaymagic |= DM_EUID;
2110 break; /* don't do magic till later */
2113 (void)seteuid((Uid_t)PL_euid);
2116 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2118 #ifdef HAS_SETRESUID
2119 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2121 if (PL_euid == PL_uid) /* special case $> = $< */
2122 PerlProc_setuid(PL_euid);
2124 PL_euid = PerlProc_geteuid();
2125 Perl_croak(aTHX_ "seteuid() not implemented");
2130 PL_euid = PerlProc_geteuid();
2131 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2134 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2135 if (PL_delaymagic) {
2136 PL_delaymagic |= DM_RGID;
2137 break; /* don't do magic till later */
2140 (void)setrgid((Gid_t)PL_gid);
2143 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2145 #ifdef HAS_SETRESGID
2146 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2148 if (PL_gid == PL_egid) /* special case $( = $) */
2149 (void)PerlProc_setgid(PL_gid);
2151 PL_gid = PerlProc_getgid();
2152 Perl_croak(aTHX_ "setrgid() not implemented");
2157 PL_gid = PerlProc_getgid();
2158 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2161 #ifdef HAS_SETGROUPS
2163 char *p = SvPV(sv, len);
2164 Groups_t gary[NGROUPS];
2169 for (i = 0; i < NGROUPS; ++i) {
2170 while (*p && !isSPACE(*p))
2179 (void)setgroups(i, gary);
2181 #else /* HAS_SETGROUPS */
2182 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2183 #endif /* HAS_SETGROUPS */
2184 if (PL_delaymagic) {
2185 PL_delaymagic |= DM_EGID;
2186 break; /* don't do magic till later */
2189 (void)setegid((Gid_t)PL_egid);
2192 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2194 #ifdef HAS_SETRESGID
2195 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2197 if (PL_egid == PL_gid) /* special case $) = $( */
2198 (void)PerlProc_setgid(PL_egid);
2200 PL_egid = PerlProc_getegid();
2201 Perl_croak(aTHX_ "setegid() not implemented");
2206 PL_egid = PerlProc_getegid();
2207 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2210 PL_chopset = SvPV_force(sv,len);
2212 #ifndef MACOS_TRADITIONAL
2214 LOCK_DOLLARZERO_MUTEX;
2215 #ifdef HAS_SETPROCTITLE
2216 /* The BSDs don't show the argv[] in ps(1) output, they
2217 * show a string from the process struct and provide
2218 * the setproctitle() routine to manipulate that. */
2221 # if __FreeBSD_version > 410001
2222 /* The leading "-" removes the "perl: " prefix,
2223 * but not the "(perl) suffix from the ps(1)
2224 * output, because that's what ps(1) shows if the
2225 * argv[] is modified. */
2226 setproctitle("-%s", s);
2227 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2228 /* This doesn't really work if you assume that
2229 * $0 = 'foobar'; will wipe out 'perl' from the $0
2230 * because in ps(1) output the result will be like
2231 * sprintf("perl: %s (perl)", s)
2232 * I guess this is a security feature:
2233 * one (a user process) cannot get rid of the original name.
2235 setproctitle("%s", s);
2239 #if defined(__hpux) && defined(PSTAT_SETCMD)
2244 pstat(PSTAT_SETCMD, un, len, 0, 0);
2250 /* See if all the arguments are contiguous in memory */
2251 for (i = 1; i < PL_origargc; i++) {
2252 if (PL_origargv[i] == s + 1
2254 || PL_origargv[i] == s + 2
2259 s += strlen(s); /* this one is ok too */
2264 /* can grab env area too? */
2267 && PL_curinterp == aTHX
2269 && (PL_origenviron[0] == s + 1))
2271 my_setenv("NoNe SuCh", Nullch);
2272 /* force copy of environment */
2273 for (i = 0; PL_origenviron[i]; i++)
2274 if (PL_origenviron[i] == s + 1) {
2281 PL_origalen = s - PL_origargv[0];
2283 s = SvPV_force(sv,len);
2285 if (i >= (I32)PL_origalen) {
2287 /* don't allow system to limit $0 seen by script */
2288 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2289 Copy(s, PL_origargv[0], i, char);
2290 s = PL_origargv[0]+i;
2294 Copy(s, PL_origargv[0], i, char);
2295 s = PL_origargv[0]+i;
2297 while (++i < (I32)PL_origalen)
2299 for (i = 1; i < PL_origargc; i++)
2300 PL_origargv[i] = Nullch;
2302 UNLOCK_DOLLARZERO_MUTEX;
2310 Perl_whichsig(pTHX_ char *sig)
2312 register char **sigv;
2314 for (sigv = PL_sig_name+1; *sigv; sigv++)
2315 if (strEQ(sig,*sigv))
2316 return PL_sig_num[sigv - PL_sig_name];
2318 if (strEQ(sig,"CHLD"))
2322 if (strEQ(sig,"CLD"))
2328 #if !defined(PERL_IMPLICIT_CONTEXT)
2333 Perl_sighandler(int sig)
2335 #ifdef PERL_GET_SIG_CONTEXT
2336 dTHXa(PERL_GET_SIG_CONTEXT);
2343 SV *sv = Nullsv, *tSv = PL_Sv;
2349 if (PL_savestack_ix + 15 <= PL_savestack_max)
2351 if (PL_markstack_ptr < PL_markstack_max - 2)
2353 if (PL_retstack_ix < PL_retstack_max - 2)
2355 if (PL_scopestack_ix < PL_scopestack_max - 3)
2358 if (!PL_psig_ptr[sig]) {
2359 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2364 /* Max number of items pushed there is 3*n or 4. We cannot fix
2365 infinity, so we fix 4 (in fact 5): */
2367 PL_savestack_ix += 5; /* Protect save in progress. */
2368 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2371 PL_markstack_ptr++; /* Protect mark. */
2374 PL_retstack[PL_retstack_ix] = NULL;
2377 PL_scopestack_ix += 1;
2378 /* sv_2cv is too complicated, try a simpler variant first: */
2379 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2380 || SvTYPE(cv) != SVt_PVCV)
2381 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2383 if (!cv || !CvROOT(cv)) {
2384 if (ckWARN(WARN_SIGNAL))
2385 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2386 PL_sig_name[sig], (gv ? GvENAME(gv)
2393 if(PL_psig_name[sig]) {
2394 sv = SvREFCNT_inc(PL_psig_name[sig]);
2396 #if !defined(PERL_IMPLICIT_CONTEXT)
2400 sv = sv_newmortal();
2401 sv_setpv(sv,PL_sig_name[sig]);
2404 PUSHSTACKi(PERLSI_SIGNAL);
2409 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2412 if (SvTRUE(ERRSV)) {
2414 #ifdef HAS_SIGPROCMASK
2415 /* Handler "died", for example to get out of a restart-able read().
2416 * Before we re-do that on its behalf re-enable the signal which was
2417 * blocked by the system when we entered.
2421 sigaddset(&set,sig);
2422 sigprocmask(SIG_UNBLOCK, &set, NULL);
2424 /* Not clear if this will work */
2425 (void)rsignal(sig, SIG_IGN);
2426 (void)rsignal(sig, &Perl_csighandler);
2428 #endif /* !PERL_MICRO */
2429 Perl_die(aTHX_ Nullformat);
2433 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2439 PL_scopestack_ix -= 1;
2442 PL_op = myop; /* Apparently not needed... */
2444 PL_Sv = tSv; /* Restore global temporaries. */
2451 restore_magic(pTHX_ void *p)
2453 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2454 SV* sv = mgs->mgs_sv;
2459 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2462 SvFLAGS(sv) |= mgs->mgs_flags;
2466 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2469 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2471 /* If we're still on top of the stack, pop us off. (That condition
2472 * will be satisfied if restore_magic was called explicitly, but *not*
2473 * if it's being called via leave_scope.)
2474 * The reason for doing this is that otherwise, things like sv_2cv()
2475 * may leave alloc gunk on the savestack, and some code
2476 * (e.g. sighandler) doesn't expect that...
2478 if (PL_savestack_ix == mgs->mgs_ss_ix)
2480 I32 popval = SSPOPINT;
2481 assert(popval == SAVEt_DESTRUCTOR_X);
2482 PL_savestack_ix -= 2;
2484 assert(popval == SAVEt_ALLOC);
2486 PL_savestack_ix -= popval;
2492 unwind_handler_stack(pTHX_ void *p)
2494 U32 flags = *(U32*)p;
2497 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2498 /* cxstack_ix-- Not needed, die already unwound it. */
2499 #if !defined(PERL_IMPLICIT_CONTEXT)
2501 SvREFCNT_dec(sig_sv);