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)
32 /* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
33 #if !defined(HAS_SIGACTION) && defined(VMS)
34 # define FAKE_PERSISTENT_SIGNAL_HANDLERS
36 /* if we're doing kill() with sys$sigprc on VMS, FAKE_DEFAULT_SIGNAL_HANDLERS */
37 #if defined(KILL_BY_SIGPRC)
38 # define FAKE_DEFAULT_SIGNAL_HANDLERS
41 static void restore_magic(pTHX_ void *p);
42 static void unwind_handler_stack(pTHX_ void *p);
45 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
53 /* MGS is typedef'ed to struct magic_state in perl.h */
56 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
59 assert(SvMAGICAL(sv));
60 #ifdef PERL_COPY_ON_WRITE
61 /* Turning READONLY off for a copy-on-write scalar is a bad idea. */
66 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
68 mgs = SSPTR(mgs_ix, MGS*);
70 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
71 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
75 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
79 =for apidoc mg_magical
81 Turns on the magical status of an SV. See C<sv_magic>.
87 Perl_mg_magical(pTHX_ SV *sv)
90 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
91 MGVTBL* vtbl = mg->mg_virtual;
93 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
97 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
106 Do magic after a value is retrieved from the SV. See C<sv_magic>.
112 Perl_mg_get(pTHX_ SV *sv)
115 MAGIC *newmg, *head, *cur, *mg;
116 I32 mgs_ix = SSNEW(sizeof(MGS));
118 save_magic(mgs_ix, sv);
120 /* We must call svt_get(sv, mg) for each valid entry in the linked
121 list of magic. svt_get() may delete the current entry, add new
122 magic to the head of the list, or upgrade the SV. AMS 20010810 */
124 newmg = cur = head = mg = SvMAGIC(sv);
126 MGVTBL *vtbl = mg->mg_virtual;
128 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
129 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
130 /* Don't restore the flags for this entry if it was deleted. */
131 if (mg->mg_flags & MGf_GSKIP)
132 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
135 mg = mg->mg_moremagic;
138 /* Have we finished with the new entries we saw? Start again
139 where we left off (unless there are more new entries). */
147 /* Were any new entries added? */
148 if (!new && (newmg = SvMAGIC(sv)) != head) {
155 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
162 Do magic after a value is assigned to the SV. See C<sv_magic>.
168 Perl_mg_set(pTHX_ SV *sv)
174 mgs_ix = SSNEW(sizeof(MGS));
175 save_magic(mgs_ix, sv);
177 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
178 MGVTBL* vtbl = mg->mg_virtual;
179 nextmg = mg->mg_moremagic; /* it may delete itself */
180 if (mg->mg_flags & MGf_GSKIP) {
181 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
182 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
184 if (vtbl && vtbl->svt_set)
185 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
188 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
193 =for apidoc mg_length
195 Report on the SV's length. See C<sv_magic>.
201 Perl_mg_length(pTHX_ SV *sv)
206 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
207 MGVTBL* vtbl = mg->mg_virtual;
208 if (vtbl && vtbl->svt_len) {
211 mgs_ix = SSNEW(sizeof(MGS));
212 save_magic(mgs_ix, sv);
213 /* omit MGf_GSKIP -- not changed here */
214 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
215 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
222 U8 *s = (U8*)SvPV(sv, len);
223 len = Perl_utf8_length(aTHX_ s, s + len);
231 Perl_mg_size(pTHX_ SV *sv)
236 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
237 MGVTBL* vtbl = mg->mg_virtual;
238 if (vtbl && vtbl->svt_len) {
241 mgs_ix = SSNEW(sizeof(MGS));
242 save_magic(mgs_ix, sv);
243 /* omit MGf_GSKIP -- not changed here */
244 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
245 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
252 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
257 Perl_croak(aTHX_ "Size magic not implemented");
266 Clear something magical that the SV represents. See C<sv_magic>.
272 Perl_mg_clear(pTHX_ SV *sv)
277 mgs_ix = SSNEW(sizeof(MGS));
278 save_magic(mgs_ix, sv);
280 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
281 MGVTBL* vtbl = mg->mg_virtual;
282 /* omit GSKIP -- never set here */
284 if (vtbl && vtbl->svt_clear)
285 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
288 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
295 Finds the magic pointer for type matching the SV. See C<sv_magic>.
301 Perl_mg_find(pTHX_ SV *sv, int type)
306 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
307 if (mg->mg_type == type)
316 Copies the magic from one SV to another. See C<sv_magic>.
322 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
326 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
327 MGVTBL* vtbl = mg->mg_virtual;
328 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
329 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
331 else if (isUPPER(mg->mg_type)) {
333 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
334 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
336 toLOWER(mg->mg_type), key, klen);
346 Free any magic storage used by the SV. See C<sv_magic>.
352 Perl_mg_free(pTHX_ SV *sv)
356 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
357 MGVTBL* vtbl = mg->mg_virtual;
358 moremagic = mg->mg_moremagic;
359 if (vtbl && vtbl->svt_free)
360 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
361 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
363 Safefree(mg->mg_ptr);
364 else if (mg->mg_len == HEf_SVKEY)
365 SvREFCNT_dec((SV*)mg->mg_ptr);
367 if (mg->mg_flags & MGf_REFCOUNTED)
368 SvREFCNT_dec(mg->mg_obj);
376 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
381 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
385 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
386 if (mg->mg_obj) /* @+ */
389 return rx->lastparen;
396 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
404 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
408 if (paren <= (I32)rx->nparens &&
409 (s = rx->startp[paren]) != -1 &&
410 (t = rx->endp[paren]) != -1)
412 if (mg->mg_obj) /* @+ */
417 if (i > 0 && PL_reg_match_utf8) {
418 char *b = rx->subbeg;
420 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
430 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
432 Perl_croak(aTHX_ PL_no_modify);
438 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
445 switch (*mg->mg_ptr) {
446 case '1': case '2': case '3': case '4':
447 case '5': case '6': case '7': case '8': case '9': case '&':
448 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
450 paren = atoi(mg->mg_ptr); /* $& is in [0] */
452 if (paren <= (I32)rx->nparens &&
453 (s1 = rx->startp[paren]) != -1 &&
454 (t1 = rx->endp[paren]) != -1)
458 if (i > 0 && PL_reg_match_utf8) {
459 char *s = rx->subbeg + s1;
460 char *send = rx->subbeg + t1;
463 if (is_utf8_string((U8*)s, i))
464 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
467 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
471 if (ckWARN(WARN_UNINITIALIZED))
476 if (ckWARN(WARN_UNINITIALIZED))
481 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
482 paren = rx->lastparen;
487 case '\016': /* ^N */
488 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
489 paren = rx->lastcloseparen;
495 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
496 if (rx->startp[0] != -1) {
507 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
508 if (rx->endp[0] != -1) {
509 i = rx->sublen - rx->endp[0];
520 if (!SvPOK(sv) && SvNIOK(sv)) {
530 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
537 switch (*mg->mg_ptr) {
538 case '\001': /* ^A */
539 sv_setsv(sv, PL_bodytarget);
541 case '\003': /* ^C */
542 sv_setiv(sv, (IV)PL_minus_c);
545 case '\004': /* ^D */
546 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
547 #if defined(YYDEBUG) && defined(DEBUGGING)
548 PL_yydebug = DEBUG_p_TEST;
551 case '\005': /* ^E */
552 if (*(mg->mg_ptr+1) == '\0') {
553 #ifdef MACOS_TRADITIONAL
557 sv_setnv(sv,(double)gMacPerl_OSErr);
558 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
563 # include <descrip.h>
564 # include <starlet.h>
566 $DESCRIPTOR(msgdsc,msg);
567 sv_setnv(sv,(NV) vaxc$errno);
568 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
569 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
575 if (!(_emx_env & 0x200)) { /* Under DOS */
576 sv_setnv(sv, (NV)errno);
577 sv_setpv(sv, errno ? Strerror(errno) : "");
579 if (errno != errno_isOS2) {
580 int tmp = _syserrno();
581 if (tmp) /* 2nd call to _syserrno() makes it 0 */
584 sv_setnv(sv, (NV)Perl_rc);
585 sv_setpv(sv, os2error(Perl_rc));
590 DWORD dwErr = GetLastError();
591 sv_setnv(sv, (NV)dwErr);
594 PerlProc_GetOSError(sv, dwErr);
601 sv_setnv(sv, (NV)errno);
602 sv_setpv(sv, errno ? Strerror(errno) : "");
607 SvNOK_on(sv); /* what a wonderful hack! */
609 else if (strEQ(mg->mg_ptr+1, "NCODING"))
610 sv_setsv(sv, PL_encoding);
612 case '\006': /* ^F */
613 sv_setiv(sv, (IV)PL_maxsysfd);
615 case '\010': /* ^H */
616 sv_setiv(sv, (IV)PL_hints);
618 case '\011': /* ^I */ /* NOT \t in EBCDIC */
620 sv_setpv(sv, PL_inplace);
622 sv_setsv(sv, &PL_sv_undef);
624 case '\017': /* ^O & ^OPEN */
625 if (*(mg->mg_ptr+1) == '\0')
626 sv_setpv(sv, PL_osname);
627 else if (strEQ(mg->mg_ptr, "\017PEN")) {
628 if (!PL_compiling.cop_io)
629 sv_setsv(sv, &PL_sv_undef);
631 sv_setsv(sv, PL_compiling.cop_io);
635 case '\020': /* ^P */
636 sv_setiv(sv, (IV)PL_perldb);
638 case '\023': /* ^S */
640 if (PL_lex_state != LEX_NOTPARSING)
643 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
648 case '\024': /* ^T */
649 if (*(mg->mg_ptr+1) == '\0') {
651 sv_setnv(sv, PL_basetime);
653 sv_setiv(sv, (IV)PL_basetime);
656 else if (strEQ(mg->mg_ptr, "\024AINT"))
657 sv_setiv(sv, PL_tainting);
659 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
660 if (*(mg->mg_ptr+1) == '\0')
661 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
662 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
663 if (PL_compiling.cop_warnings == pWARN_NONE ||
664 PL_compiling.cop_warnings == pWARN_STD)
666 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
668 else if (PL_compiling.cop_warnings == pWARN_ALL) {
669 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
672 sv_setsv(sv, PL_compiling.cop_warnings);
676 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
677 sv_setiv(sv, (IV)PL_widesyscalls);
679 case '1': case '2': case '3': case '4':
680 case '5': case '6': case '7': case '8': case '9': case '&':
681 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
685 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
686 * XXX Does the new way break anything?
688 paren = atoi(mg->mg_ptr); /* $& is in [0] */
690 if (paren <= (I32)rx->nparens &&
691 (s1 = rx->startp[paren]) != -1 &&
692 (t1 = rx->endp[paren]) != -1)
702 if (PL_reg_match_utf8 && is_utf8_string((U8*)s, i))
707 if (RX_MATCH_TAINTED(rx)) {
708 MAGIC* mg = SvMAGIC(sv);
711 SvMAGIC(sv) = mg->mg_moremagic;
713 if ((mgt = SvMAGIC(sv))) {
714 mg->mg_moremagic = mgt;
724 sv_setsv(sv,&PL_sv_undef);
727 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
728 paren = rx->lastparen;
732 sv_setsv(sv,&PL_sv_undef);
734 case '\016': /* ^N */
735 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
736 paren = rx->lastcloseparen;
740 sv_setsv(sv,&PL_sv_undef);
743 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
744 if ((s = rx->subbeg) && rx->startp[0] != -1) {
749 sv_setsv(sv,&PL_sv_undef);
752 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
753 if (rx->subbeg && rx->endp[0] != -1) {
754 s = rx->subbeg + rx->endp[0];
755 i = rx->sublen - rx->endp[0];
759 sv_setsv(sv,&PL_sv_undef);
763 if (GvIO(PL_last_in_gv)) {
764 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
770 sv_setiv(sv, (IV)STATUS_CURRENT);
771 #ifdef COMPLEX_STATUS
772 LvTARGOFF(sv) = PL_statusvalue;
773 LvTARGLEN(sv) = PL_statusvalue_vms;
778 s = IoTOP_NAME(GvIOp(PL_defoutgv));
782 sv_setpv(sv,GvENAME(PL_defoutgv));
787 s = IoFMT_NAME(GvIOp(PL_defoutgv));
789 s = GvENAME(PL_defoutgv);
794 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
797 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
800 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
808 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
811 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
817 sv_setpv(sv,SvPVX(PL_ors_sv));
820 sv_setpv(sv,PL_ofmt);
824 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
825 sv_setpv(sv, errno ? Strerror(errno) : "");
828 int saveerrno = errno;
829 sv_setnv(sv, (NV)errno);
831 if (errno == errno_isOS2 || errno == errno_isOS2_set)
832 sv_setpv(sv, os2error(Perl_rc));
835 sv_setpv(sv, errno ? Strerror(errno) : "");
839 SvNOK_on(sv); /* what a wonderful hack! */
842 sv_setiv(sv, (IV)PL_uid);
845 sv_setiv(sv, (IV)PL_euid);
848 sv_setiv(sv, (IV)PL_gid);
850 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
854 sv_setiv(sv, (IV)PL_egid);
856 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
861 Groups_t gary[NGROUPS];
862 i = getgroups(NGROUPS,gary);
864 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
867 (void)SvIOK_on(sv); /* what a wonderful hack! */
871 #ifndef MACOS_TRADITIONAL
875 #ifdef USE_5005THREADS
877 sv_setsv(sv, thr->errsv);
879 #endif /* USE_5005THREADS */
885 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
887 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
889 if (uf && uf->uf_val)
890 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
895 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
905 #ifdef DYNAMIC_ENV_FETCH
906 /* We just undefd an environment var. Is a replacement */
907 /* waiting in the wings? */
910 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
911 s = SvPV(*valp, len);
915 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
916 /* And you'll never guess what the dog had */
917 /* in its mouth... */
919 MgTAINTEDDIR_off(mg);
921 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
922 char pathbuf[256], eltbuf[256], *cp, *elt = s;
926 do { /* DCL$PATH may be a search list */
927 while (1) { /* as may dev portion of any element */
928 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
929 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
930 cando_by_name(S_IWUSR,0,elt) ) {
935 if ((cp = strchr(elt, ':')) != Nullch)
937 if (my_trnlnm(elt, eltbuf, j++))
943 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
946 if (s && klen == 4 && strEQ(ptr,"PATH")) {
947 char *strend = s + len;
953 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
956 if (i >= sizeof tmpbuf /* too long -- assume the worst */
958 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
965 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
971 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
974 my_setenv(MgPV(mg,n_a),Nullch);
979 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
982 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
987 magic_clear_all_env(sv,mg);
988 hv_iterinit((HV*)sv);
989 while ((entry = hv_iternext((HV*)sv))) {
991 my_setenv(hv_iterkey(entry, &keylen),
992 SvPV(hv_iterval((HV*)sv, entry), n_a));
1000 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1002 #if defined(VMS) || defined(EPOC)
1003 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1005 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1008 # ifdef USE_ENVIRON_ARRAY
1009 # if defined(USE_ITHREADS)
1010 /* only the parent thread can clobber the process environment */
1011 if (PL_curinterp == aTHX)
1014 # ifndef PERL_USE_SAFE_PUTENV
1017 if (environ == PL_origenviron)
1018 environ = (char**)safesysmalloc(sizeof(char*));
1020 for (i = 0; environ[i]; i++)
1021 safesysfree(environ[i]);
1022 # endif /* PERL_USE_SAFE_PUTENV */
1024 environ[0] = Nullch;
1026 # endif /* USE_ENVIRON_ARRAY */
1027 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1028 #endif /* VMS || EPC */
1032 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1033 static int sig_handlers_initted = 0;
1035 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1036 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1038 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1039 static int sig_defaulting[SIG_SIZE];
1044 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1048 /* Are we fetching a signal entry? */
1049 i = whichsig(MgPV(mg,n_a));
1052 sv_setsv(sv,PL_psig_ptr[i]);
1054 Sighandler_t sigstate;
1055 sigstate = rsignal_state(i);
1056 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1057 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1059 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1060 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1062 /* cache state so we don't fetch it again */
1063 if(sigstate == SIG_IGN)
1064 sv_setpv(sv,"IGNORE");
1066 sv_setsv(sv,&PL_sv_undef);
1067 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1074 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1078 /* Are we clearing a signal entry? */
1079 i = whichsig(MgPV(mg,n_a));
1081 if(PL_psig_ptr[i]) {
1082 SvREFCNT_dec(PL_psig_ptr[i]);
1085 if(PL_psig_name[i]) {
1086 SvREFCNT_dec(PL_psig_name[i]);
1094 Perl_raise_signal(pTHX_ int sig)
1096 /* Set a flag to say this signal is pending */
1097 PL_psig_pend[sig]++;
1098 /* And one to say _a_ signal is pending */
1103 Perl_csighandler(int sig)
1105 #ifdef PERL_GET_SIG_CONTEXT
1106 dTHXa(PERL_GET_SIG_CONTEXT);
1110 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1111 (void) rsignal(sig, &Perl_csighandler);
1112 if (sig_ignoring[sig]) return;
1114 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1115 if (sig_defaulting[sig])
1116 #ifdef KILL_BY_SIGPRC
1117 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1123 #ifdef PERL_OLD_SIGNALS
1124 /* Call the perl level handler now with risk we may be in malloc() etc. */
1125 (*PL_sighandlerp)(sig);
1127 Perl_raise_signal(aTHX_ sig);
1131 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1133 Perl_csighandler_init(void)
1136 if (sig_handlers_initted) return;
1138 for (sig = 1; sig < SIG_SIZE; sig++) {
1139 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1141 sig_defaulting[sig] = 1;
1142 (void) rsignal(sig, &Perl_csighandler);
1144 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1145 sig_ignoring[sig] = 0;
1148 sig_handlers_initted = 1;
1153 Perl_despatch_signals(pTHX)
1157 for (sig = 1; sig < SIG_SIZE; sig++) {
1158 if (PL_psig_pend[sig]) {
1159 PL_psig_pend[sig] = 0;
1160 (*PL_sighandlerp)(sig);
1166 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1175 if (strEQ(s,"__DIE__"))
1177 else if (strEQ(s,"__WARN__"))
1180 Perl_croak(aTHX_ "No such hook: %s", s);
1188 i = whichsig(s); /* ...no, a brick */
1190 if (ckWARN(WARN_SIGNAL))
1191 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1194 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1195 if (!sig_handlers_initted) Perl_csighandler_init();
1197 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1198 sig_ignoring[i] = 0;
1200 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1201 sig_defaulting[i] = 0;
1203 SvREFCNT_dec(PL_psig_name[i]);
1204 SvREFCNT_dec(PL_psig_ptr[i]);
1205 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1206 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1207 PL_psig_name[i] = newSVpvn(s, len);
1208 SvREADONLY_on(PL_psig_name[i]);
1210 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1212 (void)rsignal(i, &Perl_csighandler);
1214 *svp = SvREFCNT_inc(sv);
1217 s = SvPV_force(sv,len);
1218 if (strEQ(s,"IGNORE")) {
1220 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1221 sig_ignoring[i] = 1;
1222 (void)rsignal(i, &Perl_csighandler);
1224 (void)rsignal(i, SIG_IGN);
1229 else if (strEQ(s,"DEFAULT") || !*s) {
1231 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1233 sig_defaulting[i] = 1;
1234 (void)rsignal(i, &Perl_csighandler);
1237 (void)rsignal(i, SIG_DFL);
1244 * We should warn if HINT_STRICT_REFS, but without
1245 * access to a known hint bit in a known OP, we can't
1246 * tell whether HINT_STRICT_REFS is in force or not.
1248 if (!strchr(s,':') && !strchr(s,'\''))
1249 sv_insert(sv, 0, 0, "main::", 6);
1251 (void)rsignal(i, &Perl_csighandler);
1253 *svp = SvREFCNT_inc(sv);
1257 #endif /* !PERL_MICRO */
1260 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1262 PL_sub_generation++;
1267 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1269 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1270 PL_amagic_generation++;
1276 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1278 HV *hv = (HV*)LvTARG(sv);
1282 (void) hv_iterinit(hv);
1283 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1286 while (hv_iternext(hv))
1291 sv_setiv(sv, (IV)i);
1296 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1299 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1304 /* caller is responsible for stack switching/cleanup */
1306 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1312 PUSHs(SvTIED_obj(sv, mg));
1315 if (mg->mg_len >= 0)
1316 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1317 else if (mg->mg_len == HEf_SVKEY)
1318 PUSHs((SV*)mg->mg_ptr);
1320 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1321 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1329 return call_method(meth, flags);
1333 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1339 PUSHSTACKi(PERLSI_MAGIC);
1341 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1342 sv_setsv(sv, *PL_stack_sp--);
1352 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1354 magic_methpack(sv,mg,"FETCH");
1356 mg->mg_flags |= MGf_GSKIP;
1361 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1365 PUSHSTACKi(PERLSI_MAGIC);
1366 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1373 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1375 return magic_methpack(sv,mg,"DELETE");
1380 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1387 PUSHSTACKi(PERLSI_MAGIC);
1388 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1389 sv = *PL_stack_sp--;
1390 retval = (U32) SvIV(sv)-1;
1399 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1404 PUSHSTACKi(PERLSI_MAGIC);
1406 XPUSHs(SvTIED_obj(sv, mg));
1408 call_method("CLEAR", G_SCALAR|G_DISCARD);
1415 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1418 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1422 PUSHSTACKi(PERLSI_MAGIC);
1425 PUSHs(SvTIED_obj(sv, mg));
1430 if (call_method(meth, G_SCALAR))
1431 sv_setsv(key, *PL_stack_sp--);
1440 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1442 return magic_methpack(sv,mg,"EXISTS");
1446 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1456 svp = av_fetch(GvAV(gv),
1457 atoi(MgPV(mg,n_a)), FALSE);
1458 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1459 o->op_private = (U8)i;
1464 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1466 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1471 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1473 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1478 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1480 SV* lsv = LvTARG(sv);
1482 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1483 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1484 if (mg && mg->mg_len >= 0) {
1487 sv_pos_b2u(lsv, &i);
1488 sv_setiv(sv, i + PL_curcop->cop_arybase);
1497 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1499 SV* lsv = LvTARG(sv);
1506 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1507 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1511 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1512 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1514 else if (!SvOK(sv)) {
1518 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1520 pos = SvIV(sv) - PL_curcop->cop_arybase;
1523 ulen = sv_len_utf8(lsv);
1533 else if (pos > (SSize_t)len)
1538 sv_pos_u2b(lsv, &p, 0);
1543 mg->mg_flags &= ~MGf_MINMATCH;
1549 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1551 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1553 gv_efullname3(sv,((GV*)sv), "*");
1557 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1562 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1571 if (*s == '*' && s[1])
1573 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1578 GvGP(sv) = gp_ref(GvGP(gv));
1583 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1586 SV *lsv = LvTARG(sv);
1587 char *tmps = SvPV(lsv,len);
1588 I32 offs = LvTARGOFF(sv);
1589 I32 rem = LvTARGLEN(sv);
1592 sv_pos_u2b(lsv, &offs, &rem);
1593 if (offs > (I32)len)
1595 if (rem + offs > (I32)len)
1597 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1604 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1607 char *tmps = SvPV(sv, len);
1608 SV *lsv = LvTARG(sv);
1609 I32 lvoff = LvTARGOFF(sv);
1610 I32 lvlen = LvTARGLEN(sv);
1613 sv_utf8_upgrade(lsv);
1614 sv_pos_u2b(lsv, &lvoff, &lvlen);
1615 sv_insert(lsv, lvoff, lvlen, tmps, len);
1618 else if (lsv && SvUTF8(lsv)) {
1619 sv_pos_u2b(lsv, &lvoff, &lvlen);
1620 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1621 sv_insert(lsv, lvoff, lvlen, tmps, len);
1625 sv_insert(lsv, lvoff, lvlen, tmps, len);
1631 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1633 TAINT_IF((mg->mg_len & 1) ||
1634 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1639 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1641 if (PL_localizing) {
1642 if (PL_localizing == 1)
1647 else if (PL_tainted)
1655 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1657 SV *lsv = LvTARG(sv);
1664 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1669 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1671 do_vecset(sv); /* XXX slurp this routine */
1676 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1679 if (LvTARGLEN(sv)) {
1681 SV *ahv = LvTARG(sv);
1682 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1687 AV* av = (AV*)LvTARG(sv);
1688 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1689 targ = AvARRAY(av)[LvTARGOFF(sv)];
1691 if (targ && targ != &PL_sv_undef) {
1692 /* somebody else defined it for us */
1693 SvREFCNT_dec(LvTARG(sv));
1694 LvTARG(sv) = SvREFCNT_inc(targ);
1696 SvREFCNT_dec(mg->mg_obj);
1697 mg->mg_obj = Nullsv;
1698 mg->mg_flags &= ~MGf_REFCOUNTED;
1703 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1708 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1713 sv_setsv(LvTARG(sv), sv);
1714 SvSETMAGIC(LvTARG(sv));
1720 Perl_vivify_defelem(pTHX_ SV *sv)
1725 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1728 SV *ahv = LvTARG(sv);
1730 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1733 if (!value || value == &PL_sv_undef)
1734 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1737 AV* av = (AV*)LvTARG(sv);
1738 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1739 LvTARG(sv) = Nullsv; /* array can't be extended */
1741 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1742 if (!svp || (value = *svp) == &PL_sv_undef)
1743 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1746 (void)SvREFCNT_inc(value);
1747 SvREFCNT_dec(LvTARG(sv));
1750 SvREFCNT_dec(mg->mg_obj);
1751 mg->mg_obj = Nullsv;
1752 mg->mg_flags &= ~MGf_REFCOUNTED;
1756 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1758 AV *av = (AV*)mg->mg_obj;
1759 SV **svp = AvARRAY(av);
1760 I32 i = AvFILLp(av);
1762 if (svp[i] && svp[i] != &PL_sv_undef) {
1763 if (!SvWEAKREF(svp[i]))
1764 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1765 /* XXX Should we check that it hasn't changed? */
1767 (void)SvOK_off(svp[i]);
1768 SvWEAKREF_off(svp[i]);
1769 svp[i] = &PL_sv_undef;
1777 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1785 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1787 sv_unmagic(sv, PERL_MAGIC_bm);
1793 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1795 sv_unmagic(sv, PERL_MAGIC_fm);
1801 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1803 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1805 if (uf && uf->uf_set)
1806 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1811 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1813 regexp *re = (regexp *)mg->mg_obj;
1818 #ifdef USE_LOCALE_COLLATE
1820 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1823 * RenE<eacute> Descartes said "I think not."
1824 * and vanished with a faint plop.
1827 Safefree(mg->mg_ptr);
1833 #endif /* USE_LOCALE_COLLATE */
1836 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1841 switch (*mg->mg_ptr) {
1842 case '\001': /* ^A */
1843 sv_setsv(PL_bodytarget, sv);
1845 case '\003': /* ^C */
1846 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1849 case '\004': /* ^D */
1850 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
1851 DEBUG_x(dump_all());
1853 case '\005': /* ^E */
1854 if (*(mg->mg_ptr+1) == '\0') {
1855 #ifdef MACOS_TRADITIONAL
1856 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1859 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1862 SetLastError( SvIV(sv) );
1865 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1867 /* will anyone ever use this? */
1868 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1874 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
1876 sv_setsv(PL_encoding, sv);
1878 PL_encoding = newSVsv(sv);
1880 case '\006': /* ^F */
1881 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1883 case '\010': /* ^H */
1884 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1886 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1888 Safefree(PL_inplace);
1890 PL_inplace = savepv(SvPV(sv,len));
1892 PL_inplace = Nullch;
1894 case '\017': /* ^O */
1895 if (*(mg->mg_ptr+1) == '\0') {
1897 Safefree(PL_osname);
1899 PL_osname = savepv(SvPV(sv,len));
1903 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1904 if (!PL_compiling.cop_io)
1905 PL_compiling.cop_io = newSVsv(sv);
1907 sv_setsv(PL_compiling.cop_io,sv);
1910 case '\020': /* ^P */
1911 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1912 if (PL_perldb && !PL_DBsingle)
1915 case '\024': /* ^T */
1917 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1919 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1922 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1923 if (*(mg->mg_ptr+1) == '\0') {
1924 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1925 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1926 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1927 | (i ? G_WARN_ON : G_WARN_OFF) ;
1930 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
1931 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1932 if (!SvPOK(sv) && PL_localizing) {
1933 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1934 PL_compiling.cop_warnings = pWARN_NONE;
1939 int accumulate = 0 ;
1940 int any_fatals = 0 ;
1941 char * ptr = (char*)SvPV(sv, len) ;
1942 for (i = 0 ; i < len ; ++i) {
1943 accumulate |= ptr[i] ;
1944 any_fatals |= (ptr[i] & 0xAA) ;
1947 PL_compiling.cop_warnings = pWARN_NONE;
1948 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1949 PL_compiling.cop_warnings = pWARN_ALL;
1950 PL_dowarn |= G_WARN_ONCE ;
1953 if (specialWARN(PL_compiling.cop_warnings))
1954 PL_compiling.cop_warnings = newSVsv(sv) ;
1956 sv_setsv(PL_compiling.cop_warnings, sv);
1957 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1958 PL_dowarn |= G_WARN_ONCE ;
1964 else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
1965 PL_widesyscalls = (bool)SvTRUE(sv);
1968 if (PL_localizing) {
1969 if (PL_localizing == 1)
1970 SAVESPTR(PL_last_in_gv);
1972 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1973 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
1976 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1977 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1978 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1981 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1982 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1983 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1986 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1989 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1990 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1991 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1994 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1998 IO *io = GvIOp(PL_defoutgv);
2001 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2002 IoFLAGS(io) &= ~IOf_FLUSH;
2004 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2005 PerlIO *ofp = IoOFP(io);
2007 (void)PerlIO_flush(ofp);
2008 IoFLAGS(io) |= IOf_FLUSH;
2014 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2015 PL_multiline = (i != 0);
2018 SvREFCNT_dec(PL_rs);
2019 PL_rs = newSVsv(sv);
2023 SvREFCNT_dec(PL_ors_sv);
2024 if (SvOK(sv) || SvGMAGICAL(sv)) {
2025 PL_ors_sv = newSVsv(sv);
2033 SvREFCNT_dec(PL_ofs_sv);
2034 if (SvOK(sv) || SvGMAGICAL(sv)) {
2035 PL_ofs_sv = newSVsv(sv);
2044 PL_ofmt = savepv(SvPV(sv,len));
2047 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2050 #ifdef COMPLEX_STATUS
2051 if (PL_localizing == 2) {
2052 PL_statusvalue = LvTARGOFF(sv);
2053 PL_statusvalue_vms = LvTARGLEN(sv);
2057 #ifdef VMSISH_STATUS
2059 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2062 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2067 # define PERL_VMS_BANG vaxc$errno
2069 # define PERL_VMS_BANG 0
2071 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2072 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2076 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2077 if (PL_delaymagic) {
2078 PL_delaymagic |= DM_RUID;
2079 break; /* don't do magic till later */
2082 (void)setruid((Uid_t)PL_uid);
2085 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2087 #ifdef HAS_SETRESUID
2088 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2090 if (PL_uid == PL_euid) /* special case $< = $> */
2091 (void)PerlProc_setuid(PL_uid);
2093 PL_uid = PerlProc_getuid();
2094 Perl_croak(aTHX_ "setruid() not implemented");
2099 PL_uid = PerlProc_getuid();
2100 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2103 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2104 if (PL_delaymagic) {
2105 PL_delaymagic |= DM_EUID;
2106 break; /* don't do magic till later */
2109 (void)seteuid((Uid_t)PL_euid);
2112 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2114 #ifdef HAS_SETRESUID
2115 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2117 if (PL_euid == PL_uid) /* special case $> = $< */
2118 PerlProc_setuid(PL_euid);
2120 PL_euid = PerlProc_geteuid();
2121 Perl_croak(aTHX_ "seteuid() not implemented");
2126 PL_euid = PerlProc_geteuid();
2127 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2130 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2131 if (PL_delaymagic) {
2132 PL_delaymagic |= DM_RGID;
2133 break; /* don't do magic till later */
2136 (void)setrgid((Gid_t)PL_gid);
2139 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2141 #ifdef HAS_SETRESGID
2142 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2144 if (PL_gid == PL_egid) /* special case $( = $) */
2145 (void)PerlProc_setgid(PL_gid);
2147 PL_gid = PerlProc_getgid();
2148 Perl_croak(aTHX_ "setrgid() not implemented");
2153 PL_gid = PerlProc_getgid();
2154 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2157 #ifdef HAS_SETGROUPS
2159 char *p = SvPV(sv, len);
2160 Groups_t gary[NGROUPS];
2165 for (i = 0; i < NGROUPS; ++i) {
2166 while (*p && !isSPACE(*p))
2175 (void)setgroups(i, gary);
2177 #else /* HAS_SETGROUPS */
2178 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2179 #endif /* HAS_SETGROUPS */
2180 if (PL_delaymagic) {
2181 PL_delaymagic |= DM_EGID;
2182 break; /* don't do magic till later */
2185 (void)setegid((Gid_t)PL_egid);
2188 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2190 #ifdef HAS_SETRESGID
2191 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2193 if (PL_egid == PL_gid) /* special case $) = $( */
2194 (void)PerlProc_setgid(PL_egid);
2196 PL_egid = PerlProc_getegid();
2197 Perl_croak(aTHX_ "setegid() not implemented");
2202 PL_egid = PerlProc_getegid();
2203 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2206 PL_chopset = SvPV_force(sv,len);
2208 #ifndef MACOS_TRADITIONAL
2210 #ifdef HAS_SETPROCTITLE
2211 /* The BSDs don't show the argv[] in ps(1) output, they
2212 * show a string from the process struct and provide
2213 * the setproctitle() routine to manipulate that. */
2216 # if __FreeBSD_version > 410001
2217 /* The leading "-" removes the "perl: " prefix,
2218 * but not the "(perl) suffix from the ps(1)
2219 * output, because that's what ps(1) shows if the
2220 * argv[] is modified. */
2221 setproctitle("-%s", s);
2222 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2223 /* This doesn't really work if you assume that
2224 * $0 = 'foobar'; will wipe out 'perl' from the $0
2225 * because in ps(1) output the result will be like
2226 * sprintf("perl: %s (perl)", s)
2227 * I guess this is a security feature:
2228 * one (a user process) cannot get rid of the original name.
2230 setproctitle("%s", s);
2237 /* See if all the arguments are contiguous in memory */
2238 for (i = 1; i < PL_origargc; i++) {
2239 if (PL_origargv[i] == s + 1
2241 || PL_origargv[i] == s + 2
2246 s += strlen(s); /* this one is ok too */
2251 /* can grab env area too? */
2254 && PL_curinterp == aTHX
2256 && (PL_origenviron[0] == s + 1))
2258 my_setenv("NoNe SuCh", Nullch);
2259 /* force copy of environment */
2260 for (i = 0; PL_origenviron[i]; i++)
2261 if (PL_origenviron[i] == s + 1) {
2268 PL_origalen = s - PL_origargv[0];
2270 s = SvPV_force(sv,len);
2272 if (i >= (I32)PL_origalen) {
2274 /* don't allow system to limit $0 seen by script */
2275 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2276 Copy(s, PL_origargv[0], i, char);
2277 s = PL_origargv[0]+i;
2281 Copy(s, PL_origargv[0], i, char);
2282 s = PL_origargv[0]+i;
2284 while (++i < (I32)PL_origalen)
2286 for (i = 1; i < PL_origargc; i++)
2287 PL_origargv[i] = Nullch;
2291 #ifdef USE_5005THREADS
2293 sv_setsv(thr->errsv, sv);
2295 #endif /* USE_5005THREADS */
2300 #ifdef USE_5005THREADS
2302 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2304 DEBUG_S(PerlIO_printf(Perl_debug_log,
2305 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2306 PTR2UV(thr), PTR2UV(sv)));
2308 Perl_croak(aTHX_ "panic: magic_mutexfree");
2309 MUTEX_DESTROY(MgMUTEXP(mg));
2310 COND_DESTROY(MgCONDP(mg));
2313 #endif /* USE_5005THREADS */
2316 Perl_whichsig(pTHX_ char *sig)
2318 register char **sigv;
2320 for (sigv = PL_sig_name+1; *sigv; sigv++)
2321 if (strEQ(sig,*sigv))
2322 return PL_sig_num[sigv - PL_sig_name];
2324 if (strEQ(sig,"CHLD"))
2328 if (strEQ(sig,"CLD"))
2334 #if !defined(PERL_IMPLICIT_CONTEXT)
2339 Perl_sighandler(int sig)
2341 #ifdef PERL_GET_SIG_CONTEXT
2342 dTHXa(PERL_GET_SIG_CONTEXT);
2349 SV *sv = Nullsv, *tSv = PL_Sv;
2355 if (PL_savestack_ix + 15 <= PL_savestack_max)
2357 if (PL_markstack_ptr < PL_markstack_max - 2)
2359 if (PL_retstack_ix < PL_retstack_max - 2)
2361 if (PL_scopestack_ix < PL_scopestack_max - 3)
2364 if (!PL_psig_ptr[sig]) {
2365 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2370 /* Max number of items pushed there is 3*n or 4. We cannot fix
2371 infinity, so we fix 4 (in fact 5): */
2373 PL_savestack_ix += 5; /* Protect save in progress. */
2374 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2377 PL_markstack_ptr++; /* Protect mark. */
2380 PL_retstack[PL_retstack_ix] = NULL;
2383 PL_scopestack_ix += 1;
2384 /* sv_2cv is too complicated, try a simpler variant first: */
2385 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2386 || SvTYPE(cv) != SVt_PVCV)
2387 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2389 if (!cv || !CvROOT(cv)) {
2390 if (ckWARN(WARN_SIGNAL))
2391 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2392 PL_sig_name[sig], (gv ? GvENAME(gv)
2399 if(PL_psig_name[sig]) {
2400 sv = SvREFCNT_inc(PL_psig_name[sig]);
2402 #if !defined(PERL_IMPLICIT_CONTEXT)
2406 sv = sv_newmortal();
2407 sv_setpv(sv,PL_sig_name[sig]);
2410 PUSHSTACKi(PERLSI_SIGNAL);
2415 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2418 if (SvTRUE(ERRSV)) {
2420 #ifdef HAS_SIGPROCMASK
2421 /* Handler "died", for example to get out of a restart-able read().
2422 * Before we re-do that on its behalf re-enable the signal which was
2423 * blocked by the system when we entered.
2427 sigaddset(&set,sig);
2428 sigprocmask(SIG_UNBLOCK, &set, NULL);
2430 /* Not clear if this will work */
2431 (void)rsignal(sig, SIG_IGN);
2432 (void)rsignal(sig, &Perl_csighandler);
2434 #endif /* !PERL_MICRO */
2435 Perl_die(aTHX_ Nullformat);
2439 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2445 PL_scopestack_ix -= 1;
2448 PL_op = myop; /* Apparently not needed... */
2450 PL_Sv = tSv; /* Restore global temporaries. */
2457 restore_magic(pTHX_ void *p)
2459 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2460 SV* sv = mgs->mgs_sv;
2465 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2468 SvFLAGS(sv) |= mgs->mgs_flags;
2472 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2475 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2477 /* If we're still on top of the stack, pop us off. (That condition
2478 * will be satisfied if restore_magic was called explicitly, but *not*
2479 * if it's being called via leave_scope.)
2480 * The reason for doing this is that otherwise, things like sv_2cv()
2481 * may leave alloc gunk on the savestack, and some code
2482 * (e.g. sighandler) doesn't expect that...
2484 if (PL_savestack_ix == mgs->mgs_ss_ix)
2486 I32 popval = SSPOPINT;
2487 assert(popval == SAVEt_DESTRUCTOR_X);
2488 PL_savestack_ix -= 2;
2490 assert(popval == SAVEt_ALLOC);
2492 PL_savestack_ix -= popval;
2498 unwind_handler_stack(pTHX_ void *p)
2500 U32 flags = *(U32*)p;
2503 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2504 /* cxstack_ix-- Not needed, die already unwound it. */
2505 #if !defined(PERL_IMPLICIT_CONTEXT)
2507 SvREFCNT_dec(sig_sv);