3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent."
17 =head1 Magical Functions
24 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
34 # include <sys/pstat.h>
37 Signal_t Perl_csighandler(int sig);
39 /* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
40 #if !defined(HAS_SIGACTION) && defined(VMS)
41 # define FAKE_PERSISTENT_SIGNAL_HANDLERS
43 /* if we're doing kill() with sys$sigprc on VMS, FAKE_DEFAULT_SIGNAL_HANDLERS */
44 #if defined(KILL_BY_SIGPRC)
45 # define FAKE_DEFAULT_SIGNAL_HANDLERS
48 static void restore_magic(pTHX_ void *p);
49 static void unwind_handler_stack(pTHX_ void *p);
52 /* Missing protos on LynxOS */
53 void setruid(uid_t id);
54 void seteuid(uid_t id);
55 void setrgid(uid_t id);
56 void setegid(uid_t id);
60 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
68 /* MGS is typedef'ed to struct magic_state in perl.h */
71 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
74 assert(SvMAGICAL(sv));
75 #ifdef PERL_COPY_ON_WRITE
76 /* Turning READONLY off for a copy-on-write scalar is a bad idea. */
81 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
83 mgs = SSPTR(mgs_ix, MGS*);
85 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
86 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
90 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
94 =for apidoc mg_magical
96 Turns on the magical status of an SV. See C<sv_magic>.
102 Perl_mg_magical(pTHX_ SV *sv)
105 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
106 MGVTBL* vtbl = mg->mg_virtual;
108 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
112 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
121 Do magic after a value is retrieved from the SV. See C<sv_magic>.
127 Perl_mg_get(pTHX_ SV *sv)
130 MAGIC *newmg, *head, *cur, *mg;
131 I32 mgs_ix = SSNEW(sizeof(MGS));
133 save_magic(mgs_ix, sv);
135 /* We must call svt_get(sv, mg) for each valid entry in the linked
136 list of magic. svt_get() may delete the current entry, add new
137 magic to the head of the list, or upgrade the SV. AMS 20010810 */
139 newmg = cur = head = mg = SvMAGIC(sv);
141 MGVTBL *vtbl = mg->mg_virtual;
143 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
144 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
146 /* guard against sv having been freed */
147 if (SvTYPE(sv) == SVTYPEMASK) {
148 Perl_croak(aTHX_ "Tied variable freed while still in use");
150 /* guard against magic having been deleted - eg FETCH calling
155 /* Don't restore the flags for this entry if it was deleted. */
156 if (mg->mg_flags & MGf_GSKIP)
157 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
160 mg = mg->mg_moremagic;
163 /* Have we finished with the new entries we saw? Start again
164 where we left off (unless there are more new entries). */
172 /* Were any new entries added? */
173 if (!new && (newmg = SvMAGIC(sv)) != head) {
180 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
187 Do magic after a value is assigned to the SV. See C<sv_magic>.
193 Perl_mg_set(pTHX_ SV *sv)
199 mgs_ix = SSNEW(sizeof(MGS));
200 save_magic(mgs_ix, sv);
202 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
203 MGVTBL* vtbl = mg->mg_virtual;
204 nextmg = mg->mg_moremagic; /* it may delete itself */
205 if (mg->mg_flags & MGf_GSKIP) {
206 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
207 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
209 if (vtbl && vtbl->svt_set)
210 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
213 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
218 =for apidoc mg_length
220 Report on the SV's length. See C<sv_magic>.
226 Perl_mg_length(pTHX_ SV *sv)
231 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
232 MGVTBL* vtbl = mg->mg_virtual;
233 if (vtbl && vtbl->svt_len) {
236 mgs_ix = SSNEW(sizeof(MGS));
237 save_magic(mgs_ix, sv);
238 /* omit MGf_GSKIP -- not changed here */
239 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
240 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
247 U8 *s = (U8*)SvPV(sv, len);
248 len = Perl_utf8_length(aTHX_ s, s + len);
256 Perl_mg_size(pTHX_ SV *sv)
261 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
262 MGVTBL* vtbl = mg->mg_virtual;
263 if (vtbl && vtbl->svt_len) {
266 mgs_ix = SSNEW(sizeof(MGS));
267 save_magic(mgs_ix, sv);
268 /* omit MGf_GSKIP -- not changed here */
269 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
270 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
277 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
282 Perl_croak(aTHX_ "Size magic not implemented");
291 Clear something magical that the SV represents. See C<sv_magic>.
297 Perl_mg_clear(pTHX_ SV *sv)
302 mgs_ix = SSNEW(sizeof(MGS));
303 save_magic(mgs_ix, sv);
305 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
306 MGVTBL* vtbl = mg->mg_virtual;
307 /* omit GSKIP -- never set here */
309 if (vtbl && vtbl->svt_clear)
310 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
313 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
320 Finds the magic pointer for type matching the SV. See C<sv_magic>.
326 Perl_mg_find(pTHX_ SV *sv, int type)
331 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
332 if (mg->mg_type == type)
341 Copies the magic from one SV to another. See C<sv_magic>.
347 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
351 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
352 MGVTBL* vtbl = mg->mg_virtual;
353 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
354 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
356 else if (isUPPER(mg->mg_type)) {
358 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
359 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
361 toLOWER(mg->mg_type), key, klen);
371 Free any magic storage used by the SV. See C<sv_magic>.
377 Perl_mg_free(pTHX_ SV *sv)
381 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
382 MGVTBL* vtbl = mg->mg_virtual;
383 moremagic = mg->mg_moremagic;
384 if (vtbl && vtbl->svt_free)
385 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
386 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
388 Safefree(mg->mg_ptr);
389 else if (mg->mg_len == HEf_SVKEY)
390 SvREFCNT_dec((SV*)mg->mg_ptr);
392 if (mg->mg_flags & MGf_REFCOUNTED)
393 SvREFCNT_dec(mg->mg_obj);
401 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
406 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
410 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
411 if (mg->mg_obj) /* @+ */
414 return rx->lastparen;
421 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
429 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
433 if (paren <= (I32)rx->nparens &&
434 (s = rx->startp[paren]) != -1 &&
435 (t = rx->endp[paren]) != -1)
437 if (mg->mg_obj) /* @+ */
442 if (i > 0 && RX_MATCH_UTF8(rx)) {
443 char *b = rx->subbeg;
445 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
455 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
457 Perl_croak(aTHX_ PL_no_modify);
463 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
470 switch (*mg->mg_ptr) {
471 case '1': case '2': case '3': case '4':
472 case '5': case '6': case '7': case '8': case '9': case '&':
473 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
475 paren = atoi(mg->mg_ptr); /* $& is in [0] */
477 if (paren <= (I32)rx->nparens &&
478 (s1 = rx->startp[paren]) != -1 &&
479 (t1 = rx->endp[paren]) != -1)
483 if (i > 0 && RX_MATCH_UTF8(rx)) {
484 char *s = rx->subbeg + s1;
485 char *send = rx->subbeg + t1;
488 if (is_utf8_string((U8*)s, i))
489 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
492 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
496 if (ckWARN(WARN_UNINITIALIZED))
501 if (ckWARN(WARN_UNINITIALIZED))
506 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
507 paren = rx->lastparen;
512 case '\016': /* ^N */
513 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
514 paren = rx->lastcloseparen;
520 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
521 if (rx->startp[0] != -1) {
532 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
533 if (rx->endp[0] != -1) {
534 i = rx->sublen - rx->endp[0];
545 if (!SvPOK(sv) && SvNIOK(sv)) {
555 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
558 register char *s = NULL;
562 switch (*mg->mg_ptr) {
563 case '\001': /* ^A */
564 sv_setsv(sv, PL_bodytarget);
566 case '\003': /* ^C */
567 sv_setiv(sv, (IV)PL_minus_c);
570 case '\004': /* ^D */
571 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
572 #if defined(YYDEBUG) && defined(DEBUGGING)
573 PL_yydebug = DEBUG_p_TEST;
576 case '\005': /* ^E */
577 if (*(mg->mg_ptr+1) == '\0') {
578 #ifdef MACOS_TRADITIONAL
582 sv_setnv(sv,(double)gMacPerl_OSErr);
583 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
588 # include <descrip.h>
589 # include <starlet.h>
591 $DESCRIPTOR(msgdsc,msg);
592 sv_setnv(sv,(NV) vaxc$errno);
593 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
594 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
600 if (!(_emx_env & 0x200)) { /* Under DOS */
601 sv_setnv(sv, (NV)errno);
602 sv_setpv(sv, errno ? Strerror(errno) : "");
604 if (errno != errno_isOS2) {
605 int tmp = _syserrno();
606 if (tmp) /* 2nd call to _syserrno() makes it 0 */
609 sv_setnv(sv, (NV)Perl_rc);
610 sv_setpv(sv, os2error(Perl_rc));
615 DWORD dwErr = GetLastError();
616 sv_setnv(sv, (NV)dwErr);
619 PerlProc_GetOSError(sv, dwErr);
627 int saveerrno = errno;
628 sv_setnv(sv, (NV)errno);
629 sv_setpv(sv, errno ? Strerror(errno) : "");
636 SvNOK_on(sv); /* what a wonderful hack! */
638 else if (strEQ(mg->mg_ptr+1, "NCODING"))
639 sv_setsv(sv, PL_encoding);
641 case '\006': /* ^F */
642 sv_setiv(sv, (IV)PL_maxsysfd);
644 case '\010': /* ^H */
645 sv_setiv(sv, (IV)PL_hints);
647 case '\011': /* ^I */ /* NOT \t in EBCDIC */
649 sv_setpv(sv, PL_inplace);
651 sv_setsv(sv, &PL_sv_undef);
653 case '\017': /* ^O & ^OPEN */
654 if (*(mg->mg_ptr+1) == '\0')
655 sv_setpv(sv, PL_osname);
656 else if (strEQ(mg->mg_ptr, "\017PEN")) {
657 if (!PL_compiling.cop_io)
658 sv_setsv(sv, &PL_sv_undef);
660 sv_setsv(sv, PL_compiling.cop_io);
664 case '\020': /* ^P */
665 sv_setiv(sv, (IV)PL_perldb);
667 case '\023': /* ^S */
668 if (*(mg->mg_ptr+1) == '\0') {
669 if (PL_lex_state != LEX_NOTPARSING)
672 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
677 case '\024': /* ^T */
678 if (*(mg->mg_ptr+1) == '\0') {
680 sv_setnv(sv, PL_basetime);
682 sv_setiv(sv, (IV)PL_basetime);
685 else if (strEQ(mg->mg_ptr, "\024AINT"))
686 sv_setiv(sv, PL_tainting
687 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
690 case '\025': /* $^UNICODE */
691 if (strEQ(mg->mg_ptr, "\025NICODE"))
692 sv_setuv(sv, (UV) PL_unicode);
694 case '\027': /* ^W & $^WARNING_BITS */
695 if (*(mg->mg_ptr+1) == '\0')
696 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
697 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
698 if (PL_compiling.cop_warnings == pWARN_NONE ||
699 PL_compiling.cop_warnings == pWARN_STD)
701 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
703 else if (PL_compiling.cop_warnings == pWARN_ALL) {
704 /* Get the bit mask for $warnings::Bits{all}, because
705 * it could have been extended by warnings::register */
707 HV *bits=get_hv("warnings::Bits", FALSE);
708 if (bits && (bits_all=hv_fetch(bits, "all", 3, FALSE))) {
709 sv_setsv(sv, *bits_all);
712 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
716 sv_setsv(sv, PL_compiling.cop_warnings);
721 case '1': case '2': case '3': case '4':
722 case '5': case '6': case '7': case '8': case '9': case '&':
723 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
727 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
728 * XXX Does the new way break anything?
730 paren = atoi(mg->mg_ptr); /* $& is in [0] */
732 if (paren <= (I32)rx->nparens &&
733 (s1 = rx->startp[paren]) != -1 &&
734 (t1 = rx->endp[paren]) != -1)
744 if (RX_MATCH_UTF8(rx) && is_utf8_string((U8*)s, i))
749 if (RX_MATCH_TAINTED(rx)) {
750 MAGIC* mg = SvMAGIC(sv);
753 SvMAGIC(sv) = mg->mg_moremagic;
755 if ((mgt = SvMAGIC(sv))) {
756 mg->mg_moremagic = mgt;
766 sv_setsv(sv,&PL_sv_undef);
769 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
770 paren = rx->lastparen;
774 sv_setsv(sv,&PL_sv_undef);
776 case '\016': /* ^N */
777 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
778 paren = rx->lastcloseparen;
782 sv_setsv(sv,&PL_sv_undef);
785 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
786 if ((s = rx->subbeg) && rx->startp[0] != -1) {
791 sv_setsv(sv,&PL_sv_undef);
794 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
795 if (rx->subbeg && rx->endp[0] != -1) {
796 s = rx->subbeg + rx->endp[0];
797 i = rx->sublen - rx->endp[0];
801 sv_setsv(sv,&PL_sv_undef);
805 if (GvIO(PL_last_in_gv)) {
806 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
812 sv_setiv(sv, (IV)STATUS_CURRENT);
813 #ifdef COMPLEX_STATUS
814 LvTARGOFF(sv) = PL_statusvalue;
815 LvTARGLEN(sv) = PL_statusvalue_vms;
820 if (GvIOp(PL_defoutgv))
821 s = IoTOP_NAME(GvIOp(PL_defoutgv));
825 sv_setpv(sv,GvENAME(PL_defoutgv));
830 if (GvIOp(PL_defoutgv))
831 s = IoFMT_NAME(GvIOp(PL_defoutgv));
833 s = GvENAME(PL_defoutgv);
838 if (GvIOp(PL_defoutgv))
839 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
842 if (GvIOp(PL_defoutgv))
843 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
846 if (GvIOp(PL_defoutgv))
847 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
855 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
858 if (GvIOp(PL_defoutgv))
859 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
865 sv_copypv(sv, PL_ors_sv);
868 sv_setpv(sv,PL_ofmt);
872 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
873 sv_setpv(sv, errno ? Strerror(errno) : "");
876 int saveerrno = errno;
877 sv_setnv(sv, (NV)errno);
879 if (errno == errno_isOS2 || errno == errno_isOS2_set)
880 sv_setpv(sv, os2error(Perl_rc));
883 sv_setpv(sv, errno ? Strerror(errno) : "");
887 SvNOK_on(sv); /* what a wonderful hack! */
890 sv_setiv(sv, (IV)PL_uid);
893 sv_setiv(sv, (IV)PL_euid);
896 sv_setiv(sv, (IV)PL_gid);
898 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
902 sv_setiv(sv, (IV)PL_egid);
904 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
909 Groups_t gary[NGROUPS];
910 i = getgroups(NGROUPS,gary);
912 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
915 (void)SvIOK_on(sv); /* what a wonderful hack! */
917 #ifndef MACOS_TRADITIONAL
926 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
928 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
930 if (uf && uf->uf_val)
931 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
936 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
946 #ifdef DYNAMIC_ENV_FETCH
947 /* We just undefd an environment var. Is a replacement */
948 /* waiting in the wings? */
951 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
952 s = SvPV(*valp, len);
956 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
957 /* And you'll never guess what the dog had */
958 /* in its mouth... */
960 MgTAINTEDDIR_off(mg);
962 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
963 char pathbuf[256], eltbuf[256], *cp, *elt = s;
967 do { /* DCL$PATH may be a search list */
968 while (1) { /* as may dev portion of any element */
969 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
970 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
971 cando_by_name(S_IWUSR,0,elt) ) {
976 if ((cp = strchr(elt, ':')) != Nullch)
978 if (my_trnlnm(elt, eltbuf, j++))
984 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
987 if (s && klen == 4 && strEQ(ptr,"PATH")) {
988 char *strend = s + len;
994 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
997 if (i >= sizeof tmpbuf /* too long -- assume the worst */
999 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
1000 MgTAINTEDDIR_on(mg);
1006 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1012 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
1015 my_setenv(MgPV(mg,n_a),Nullch);
1020 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1023 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1025 if (PL_localizing) {
1028 magic_clear_all_env(sv,mg);
1029 hv_iterinit((HV*)sv);
1030 while ((entry = hv_iternext((HV*)sv))) {
1032 my_setenv(hv_iterkey(entry, &keylen),
1033 SvPV(hv_iterval((HV*)sv, entry), n_a));
1041 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1044 #if defined(VMS) || defined(EPOC)
1045 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1047 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1050 # ifdef USE_ENVIRON_ARRAY
1051 # if defined(USE_ITHREADS)
1052 /* only the parent thread can clobber the process environment */
1053 if (PL_curinterp == aTHX)
1056 # ifndef PERL_USE_SAFE_PUTENV
1059 if (environ == PL_origenviron)
1060 environ = (char**)safesysmalloc(sizeof(char*));
1062 for (i = 0; environ[i]; i++)
1063 safesysfree(environ[i]);
1064 # endif /* PERL_USE_SAFE_PUTENV */
1066 environ[0] = Nullch;
1068 # endif /* USE_ENVIRON_ARRAY */
1069 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1070 #endif /* VMS || EPOC */
1071 #endif /* !PERL_MICRO */
1075 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1076 static int sig_handlers_initted = 0;
1078 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1079 static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
1081 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1082 static int sig_defaulting[SIG_SIZE];
1086 #ifdef HAS_SIGPROCMASK
1088 restore_sigmask(pTHX_ SV *save_sv)
1090 sigset_t *ossetp = (sigset_t *) SvPV_nolen( save_sv );
1091 (void)sigprocmask(SIG_SETMASK, ossetp, (sigset_t *)0);
1095 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1099 /* Are we fetching a signal entry? */
1100 i = whichsig(MgPV(mg,n_a));
1103 sv_setsv(sv,PL_psig_ptr[i]);
1105 Sighandler_t sigstate;
1106 sigstate = rsignal_state(i);
1107 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1108 if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
1110 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1111 if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
1113 /* cache state so we don't fetch it again */
1114 if(sigstate == SIG_IGN)
1115 sv_setpv(sv,"IGNORE");
1117 sv_setsv(sv,&PL_sv_undef);
1118 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1125 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1127 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1128 * refactoring might be in order.
1136 if (strEQ(s,"__DIE__"))
1138 else if (strEQ(s,"__WARN__"))
1141 Perl_croak(aTHX_ "No such hook: %s", s);
1145 SvREFCNT_dec(to_dec);
1150 /* Are we clearing a signal entry? */
1153 #ifdef HAS_SIGPROCMASK
1156 /* Avoid having the signal arrive at a bad time, if possible. */
1159 sigprocmask(SIG_BLOCK, &set, &save);
1161 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1162 SAVEFREESV(save_sv);
1163 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1166 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1167 if (!sig_handlers_initted) Perl_csighandler_init();
1169 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1170 sig_defaulting[i] = 1;
1171 (void)rsignal(i, PL_csighandlerp);
1173 (void)rsignal(i, SIG_DFL);
1175 if(PL_psig_name[i]) {
1176 SvREFCNT_dec(PL_psig_name[i]);
1179 if(PL_psig_ptr[i]) {
1180 to_dec=PL_psig_ptr[i];
1183 SvREFCNT_dec(to_dec);
1193 Perl_raise_signal(pTHX_ int sig)
1195 /* Set a flag to say this signal is pending */
1196 PL_psig_pend[sig]++;
1197 /* And one to say _a_ signal is pending */
1202 Perl_csighandler(int sig)
1204 #ifdef PERL_GET_SIG_CONTEXT
1205 dTHXa(PERL_GET_SIG_CONTEXT);
1209 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1210 (void) rsignal(sig, PL_csighandlerp);
1211 if (sig_ignoring[sig]) return;
1213 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1214 if (sig_defaulting[sig])
1215 #ifdef KILL_BY_SIGPRC
1216 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1221 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
1222 /* Call the perl level handler now--
1223 * with risk we may be in malloc() etc. */
1224 (*PL_sighandlerp)(sig);
1226 Perl_raise_signal(aTHX_ sig);
1229 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1231 Perl_csighandler_init(void)
1234 if (sig_handlers_initted) return;
1236 for (sig = 1; sig < SIG_SIZE; sig++) {
1237 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1239 sig_defaulting[sig] = 1;
1240 (void) rsignal(sig, PL_csighandlerp);
1242 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1243 sig_ignoring[sig] = 0;
1246 sig_handlers_initted = 1;
1251 Perl_despatch_signals(pTHX)
1255 for (sig = 1; sig < SIG_SIZE; sig++) {
1256 if (PL_psig_pend[sig]) {
1257 PERL_BLOCKSIG_ADD(set, sig);
1258 PL_psig_pend[sig] = 0;
1259 PERL_BLOCKSIG_BLOCK(set);
1260 (*PL_sighandlerp)(sig);
1261 PERL_BLOCKSIG_UNBLOCK(set);
1267 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1272 /* Need to be careful with SvREFCNT_dec(), because that can have side
1273 * effects (due to closures). We must make sure that the new disposition
1274 * is in place before it is called.
1278 #ifdef HAS_SIGPROCMASK
1285 if (strEQ(s,"__DIE__"))
1287 else if (strEQ(s,"__WARN__"))
1290 Perl_croak(aTHX_ "No such hook: %s", s);
1298 i = whichsig(s); /* ...no, a brick */
1300 if (ckWARN(WARN_SIGNAL))
1301 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1304 #ifdef HAS_SIGPROCMASK
1305 /* Avoid having the signal arrive at a bad time, if possible. */
1308 sigprocmask(SIG_BLOCK, &set, &save);
1310 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1311 SAVEFREESV(save_sv);
1312 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1315 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1316 if (!sig_handlers_initted) Perl_csighandler_init();
1318 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1319 sig_ignoring[i] = 0;
1321 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1322 sig_defaulting[i] = 0;
1324 SvREFCNT_dec(PL_psig_name[i]);
1325 to_dec = PL_psig_ptr[i];
1326 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1327 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1328 PL_psig_name[i] = newSVpvn(s, len);
1329 SvREADONLY_on(PL_psig_name[i]);
1331 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1333 (void)rsignal(i, PL_csighandlerp);
1334 #ifdef HAS_SIGPROCMASK
1339 *svp = SvREFCNT_inc(sv);
1341 SvREFCNT_dec(to_dec);
1344 s = SvPV_force(sv,len);
1345 if (strEQ(s,"IGNORE")) {
1347 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1348 sig_ignoring[i] = 1;
1349 (void)rsignal(i, PL_csighandlerp);
1351 (void)rsignal(i, SIG_IGN);
1355 else if (strEQ(s,"DEFAULT") || !*s) {
1357 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1359 sig_defaulting[i] = 1;
1360 (void)rsignal(i, PL_csighandlerp);
1363 (void)rsignal(i, SIG_DFL);
1368 * We should warn if HINT_STRICT_REFS, but without
1369 * access to a known hint bit in a known OP, we can't
1370 * tell whether HINT_STRICT_REFS is in force or not.
1372 if (!strchr(s,':') && !strchr(s,'\''))
1373 sv_insert(sv, 0, 0, "main::", 6);
1375 (void)rsignal(i, PL_csighandlerp);
1377 *svp = SvREFCNT_inc(sv);
1379 #ifdef HAS_SIGPROCMASK
1384 SvREFCNT_dec(to_dec);
1387 #endif /* !PERL_MICRO */
1390 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1392 PL_sub_generation++;
1397 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1399 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1400 PL_amagic_generation++;
1406 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1408 HV *hv = (HV*)LvTARG(sv);
1412 (void) hv_iterinit(hv);
1413 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1416 while (hv_iternext(hv))
1421 sv_setiv(sv, (IV)i);
1426 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1429 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1434 /* caller is responsible for stack switching/cleanup */
1436 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1442 PUSHs(SvTIED_obj(sv, mg));
1445 if (mg->mg_len >= 0)
1446 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1447 else if (mg->mg_len == HEf_SVKEY)
1448 PUSHs((SV*)mg->mg_ptr);
1450 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1451 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1459 return call_method(meth, flags);
1463 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1469 PUSHSTACKi(PERLSI_MAGIC);
1471 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1472 sv_setsv(sv, *PL_stack_sp--);
1482 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1485 mg->mg_flags |= MGf_GSKIP;
1486 magic_methpack(sv,mg,"FETCH");
1491 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1495 PUSHSTACKi(PERLSI_MAGIC);
1496 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1503 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1505 return magic_methpack(sv,mg,"DELETE");
1510 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1517 PUSHSTACKi(PERLSI_MAGIC);
1518 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1519 sv = *PL_stack_sp--;
1520 retval = (U32) SvIV(sv)-1;
1529 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1534 PUSHSTACKi(PERLSI_MAGIC);
1536 XPUSHs(SvTIED_obj(sv, mg));
1538 call_method("CLEAR", G_SCALAR|G_DISCARD);
1545 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1548 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1552 PUSHSTACKi(PERLSI_MAGIC);
1555 PUSHs(SvTIED_obj(sv, mg));
1560 if (call_method(meth, G_SCALAR))
1561 sv_setsv(key, *PL_stack_sp--);
1570 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1572 return magic_methpack(sv,mg,"EXISTS");
1576 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1586 svp = av_fetch(GvAV(gv),
1587 atoi(MgPV(mg,n_a)), FALSE);
1588 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp)))) {
1589 /* set or clear breakpoint in the relevant control op */
1591 o->op_flags |= OPf_SPECIAL;
1593 o->op_flags &= ~OPf_SPECIAL;
1599 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1601 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1606 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1608 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1613 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1615 SV* lsv = LvTARG(sv);
1617 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1618 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1619 if (mg && mg->mg_len >= 0) {
1622 sv_pos_b2u(lsv, &i);
1623 sv_setiv(sv, i + PL_curcop->cop_arybase);
1632 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1634 SV* lsv = LvTARG(sv);
1641 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1642 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1646 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1647 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1649 else if (!SvOK(sv)) {
1653 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1655 pos = SvIV(sv) - PL_curcop->cop_arybase;
1658 ulen = sv_len_utf8(lsv);
1668 else if (pos > (SSize_t)len)
1673 sv_pos_u2b(lsv, &p, 0);
1678 mg->mg_flags &= ~MGf_MINMATCH;
1684 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1686 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1688 gv_efullname3(sv,((GV*)sv), "*");
1692 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1697 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1706 if (*s == '*' && s[1])
1708 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1713 GvGP(sv) = gp_ref(GvGP(gv));
1718 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1721 SV *lsv = LvTARG(sv);
1722 char *tmps = SvPV(lsv,len);
1723 I32 offs = LvTARGOFF(sv);
1724 I32 rem = LvTARGLEN(sv);
1727 sv_pos_u2b(lsv, &offs, &rem);
1728 if (offs > (I32)len)
1730 if (rem + offs > (I32)len)
1732 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1739 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1742 char *tmps = SvPV(sv, len);
1743 SV *lsv = LvTARG(sv);
1744 I32 lvoff = LvTARGOFF(sv);
1745 I32 lvlen = LvTARGLEN(sv);
1748 sv_utf8_upgrade(lsv);
1749 sv_pos_u2b(lsv, &lvoff, &lvlen);
1750 sv_insert(lsv, lvoff, lvlen, tmps, len);
1753 else if (lsv && SvUTF8(lsv)) {
1754 sv_pos_u2b(lsv, &lvoff, &lvlen);
1755 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1756 sv_insert(lsv, lvoff, lvlen, tmps, len);
1760 sv_insert(lsv, lvoff, lvlen, tmps, len);
1766 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1768 TAINT_IF((mg->mg_len & 1) ||
1769 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1774 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1776 if (PL_localizing) {
1777 if (PL_localizing == 1)
1782 else if (PL_tainted)
1790 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1792 SV *lsv = LvTARG(sv);
1799 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1804 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1806 do_vecset(sv); /* XXX slurp this routine */
1811 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1814 if (LvTARGLEN(sv)) {
1816 SV *ahv = LvTARG(sv);
1817 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1822 AV* av = (AV*)LvTARG(sv);
1823 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1824 targ = AvARRAY(av)[LvTARGOFF(sv)];
1826 if (targ && targ != &PL_sv_undef) {
1827 /* somebody else defined it for us */
1828 SvREFCNT_dec(LvTARG(sv));
1829 LvTARG(sv) = SvREFCNT_inc(targ);
1831 SvREFCNT_dec(mg->mg_obj);
1832 mg->mg_obj = Nullsv;
1833 mg->mg_flags &= ~MGf_REFCOUNTED;
1838 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1843 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1848 sv_setsv(LvTARG(sv), sv);
1849 SvSETMAGIC(LvTARG(sv));
1855 Perl_vivify_defelem(pTHX_ SV *sv)
1860 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1863 SV *ahv = LvTARG(sv);
1865 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1868 if (!value || value == &PL_sv_undef)
1869 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1872 AV* av = (AV*)LvTARG(sv);
1873 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1874 LvTARG(sv) = Nullsv; /* array can't be extended */
1876 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1877 if (!svp || (value = *svp) == &PL_sv_undef)
1878 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1881 (void)SvREFCNT_inc(value);
1882 SvREFCNT_dec(LvTARG(sv));
1885 SvREFCNT_dec(mg->mg_obj);
1886 mg->mg_obj = Nullsv;
1887 mg->mg_flags &= ~MGf_REFCOUNTED;
1891 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1893 AV *av = (AV*)mg->mg_obj;
1894 SV **svp = AvARRAY(av);
1895 I32 i = AvFILLp(av);
1897 if (svp[i] && svp[i] != &PL_sv_undef) {
1898 if (!SvWEAKREF(svp[i]))
1899 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1900 /* XXX Should we check that it hasn't changed? */
1902 (void)SvOK_off(svp[i]);
1903 SvWEAKREF_off(svp[i]);
1904 svp[i] = &PL_sv_undef;
1908 SvREFCNT_dec(av); /* remove extra count added by sv_add_backref() */
1913 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1921 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1923 sv_unmagic(sv, PERL_MAGIC_bm);
1929 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1931 sv_unmagic(sv, PERL_MAGIC_fm);
1937 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1939 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1941 if (uf && uf->uf_set)
1942 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
1947 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
1949 sv_unmagic(sv, PERL_MAGIC_qr);
1954 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1956 regexp *re = (regexp *)mg->mg_obj;
1961 #ifdef USE_LOCALE_COLLATE
1963 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1966 * RenE<eacute> Descartes said "I think not."
1967 * and vanished with a faint plop.
1970 Safefree(mg->mg_ptr);
1976 #endif /* USE_LOCALE_COLLATE */
1978 /* Just clear the UTF-8 cache data. */
1980 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
1982 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
1984 mg->mg_len = -1; /* The mg_len holds the len cache. */
1989 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1994 switch (*mg->mg_ptr) {
1995 case '\001': /* ^A */
1996 sv_setsv(PL_bodytarget, sv);
1998 case '\003': /* ^C */
1999 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2002 case '\004': /* ^D */
2005 PL_debug = get_debug_opts(&s) | DEBUG_TOP_FLAG;
2006 DEBUG_x(dump_all());
2008 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
2011 case '\005': /* ^E */
2012 if (*(mg->mg_ptr+1) == '\0') {
2013 #ifdef MACOS_TRADITIONAL
2014 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2017 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2020 SetLastError( SvIV(sv) );
2023 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2025 /* will anyone ever use this? */
2026 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
2032 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2034 SvREFCNT_dec(PL_encoding);
2035 if (SvOK(sv) || SvGMAGICAL(sv)) {
2036 PL_encoding = newSVsv(sv);
2039 PL_encoding = Nullsv;
2043 case '\006': /* ^F */
2044 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2046 case '\010': /* ^H */
2047 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2049 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2051 Safefree(PL_inplace);
2053 PL_inplace = savepv(SvPV(sv,len));
2055 PL_inplace = Nullch;
2057 case '\017': /* ^O */
2058 if (*(mg->mg_ptr+1) == '\0') {
2060 Safefree(PL_osname);
2062 PL_osname = savepv(SvPV(sv,len));
2066 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2067 if (!PL_compiling.cop_io)
2068 PL_compiling.cop_io = newSVsv(sv);
2070 sv_setsv(PL_compiling.cop_io,sv);
2073 case '\020': /* ^P */
2074 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2075 if (PL_perldb && !PL_DBsingle)
2078 case '\024': /* ^T */
2080 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2082 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2085 case '\027': /* ^W & $^WARNING_BITS */
2086 if (*(mg->mg_ptr+1) == '\0') {
2087 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2088 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2089 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2090 | (i ? G_WARN_ON : G_WARN_OFF) ;
2093 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2094 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2095 if (!SvPOK(sv) && PL_localizing) {
2096 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2097 PL_compiling.cop_warnings = pWARN_NONE;
2102 int accumulate = 0 ;
2103 int any_fatals = 0 ;
2104 char * ptr = (char*)SvPV(sv, len) ;
2105 for (i = 0 ; i < len ; ++i) {
2106 accumulate |= ptr[i] ;
2107 any_fatals |= (ptr[i] & 0xAA) ;
2110 PL_compiling.cop_warnings = pWARN_NONE;
2111 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
2112 PL_compiling.cop_warnings = pWARN_ALL;
2113 PL_dowarn |= G_WARN_ONCE ;
2116 if (specialWARN(PL_compiling.cop_warnings))
2117 PL_compiling.cop_warnings = newSVsv(sv) ;
2119 sv_setsv(PL_compiling.cop_warnings, sv);
2120 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2121 PL_dowarn |= G_WARN_ONCE ;
2129 if (PL_localizing) {
2130 if (PL_localizing == 1)
2131 SAVESPTR(PL_last_in_gv);
2133 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2134 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2137 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2138 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
2139 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
2142 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2143 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
2144 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
2147 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2150 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2151 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2152 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2155 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2159 IO *io = GvIOp(PL_defoutgv);
2162 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2163 IoFLAGS(io) &= ~IOf_FLUSH;
2165 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2166 PerlIO *ofp = IoOFP(io);
2168 (void)PerlIO_flush(ofp);
2169 IoFLAGS(io) |= IOf_FLUSH;
2175 SvREFCNT_dec(PL_rs);
2176 PL_rs = newSVsv(sv);
2180 SvREFCNT_dec(PL_ors_sv);
2181 if (SvOK(sv) || SvGMAGICAL(sv)) {
2182 PL_ors_sv = newSVsv(sv);
2190 SvREFCNT_dec(PL_ofs_sv);
2191 if (SvOK(sv) || SvGMAGICAL(sv)) {
2192 PL_ofs_sv = newSVsv(sv);
2201 PL_ofmt = savepv(SvPV(sv,len));
2204 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2207 #ifdef COMPLEX_STATUS
2208 if (PL_localizing == 2) {
2209 PL_statusvalue = LvTARGOFF(sv);
2210 PL_statusvalue_vms = LvTARGLEN(sv);
2214 #ifdef VMSISH_STATUS
2216 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2219 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2224 # define PERL_VMS_BANG vaxc$errno
2226 # define PERL_VMS_BANG 0
2228 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2229 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2233 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2234 if (PL_delaymagic) {
2235 PL_delaymagic |= DM_RUID;
2236 break; /* don't do magic till later */
2239 (void)setruid((Uid_t)PL_uid);
2242 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2244 #ifdef HAS_SETRESUID
2245 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2247 if (PL_uid == PL_euid) { /* special case $< = $> */
2249 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2250 if (PL_uid != 0 && PerlProc_getuid() == 0)
2251 (void)PerlProc_setuid(0);
2253 (void)PerlProc_setuid(PL_uid);
2255 PL_uid = PerlProc_getuid();
2256 Perl_croak(aTHX_ "setruid() not implemented");
2261 PL_uid = PerlProc_getuid();
2262 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2265 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2266 if (PL_delaymagic) {
2267 PL_delaymagic |= DM_EUID;
2268 break; /* don't do magic till later */
2271 (void)seteuid((Uid_t)PL_euid);
2274 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2276 #ifdef HAS_SETRESUID
2277 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2279 if (PL_euid == PL_uid) /* special case $> = $< */
2280 PerlProc_setuid(PL_euid);
2282 PL_euid = PerlProc_geteuid();
2283 Perl_croak(aTHX_ "seteuid() not implemented");
2288 PL_euid = PerlProc_geteuid();
2289 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2292 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2293 if (PL_delaymagic) {
2294 PL_delaymagic |= DM_RGID;
2295 break; /* don't do magic till later */
2298 (void)setrgid((Gid_t)PL_gid);
2301 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2303 #ifdef HAS_SETRESGID
2304 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2306 if (PL_gid == PL_egid) /* special case $( = $) */
2307 (void)PerlProc_setgid(PL_gid);
2309 PL_gid = PerlProc_getgid();
2310 Perl_croak(aTHX_ "setrgid() not implemented");
2315 PL_gid = PerlProc_getgid();
2316 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2319 #ifdef HAS_SETGROUPS
2321 char *p = SvPV(sv, len);
2322 Groups_t gary[NGROUPS];
2327 for (i = 0; i < NGROUPS; ++i) {
2328 while (*p && !isSPACE(*p))
2337 (void)setgroups(i, gary);
2339 #else /* HAS_SETGROUPS */
2340 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2341 #endif /* HAS_SETGROUPS */
2342 if (PL_delaymagic) {
2343 PL_delaymagic |= DM_EGID;
2344 break; /* don't do magic till later */
2347 (void)setegid((Gid_t)PL_egid);
2350 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2352 #ifdef HAS_SETRESGID
2353 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2355 if (PL_egid == PL_gid) /* special case $) = $( */
2356 (void)PerlProc_setgid(PL_egid);
2358 PL_egid = PerlProc_getegid();
2359 Perl_croak(aTHX_ "setegid() not implemented");
2364 PL_egid = PerlProc_getegid();
2365 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2368 PL_chopset = SvPV_force(sv,len);
2370 #ifndef MACOS_TRADITIONAL
2372 LOCK_DOLLARZERO_MUTEX;
2373 #ifdef HAS_SETPROCTITLE
2374 /* The BSDs don't show the argv[] in ps(1) output, they
2375 * show a string from the process struct and provide
2376 * the setproctitle() routine to manipulate that. */
2379 # if __FreeBSD_version > 410001
2380 /* The leading "-" removes the "perl: " prefix,
2381 * but not the "(perl) suffix from the ps(1)
2382 * output, because that's what ps(1) shows if the
2383 * argv[] is modified. */
2384 setproctitle("-%s", s);
2385 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2386 /* This doesn't really work if you assume that
2387 * $0 = 'foobar'; will wipe out 'perl' from the $0
2388 * because in ps(1) output the result will be like
2389 * sprintf("perl: %s (perl)", s)
2390 * I guess this is a security feature:
2391 * one (a user process) cannot get rid of the original name.
2393 setproctitle("%s", s);
2397 #if defined(__hpux) && defined(PSTAT_SETCMD)
2402 pstat(PSTAT_SETCMD, un, len, 0, 0);
2405 /* PL_origalen is set in perl_parse(). */
2406 s = SvPV_force(sv,len);
2407 if (len >= (STRLEN)PL_origalen-1) {
2408 /* Longer than original, will be truncated. We assume that
2409 * PL_origalen bytes are available. */
2410 Copy(s, PL_origargv[0], PL_origalen-1, char);
2411 PL_origargv[0][PL_origalen-1] = 0;
2414 /* Shorter than original, will be padded. */
2415 Copy(s, PL_origargv[0], len, char);
2416 PL_origargv[0][len] = 0;
2417 memset(PL_origargv[0] + len + 1,
2418 /* Is the space counterintuitive? Yes.
2419 * (You were expecting \0?)
2420 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2423 PL_origalen - len - 1);
2424 for (i = 1; i < PL_origargc; i++)
2427 UNLOCK_DOLLARZERO_MUTEX;
2435 Perl_whichsig(pTHX_ char *sig)
2437 register char **sigv;
2439 for (sigv = PL_sig_name; *sigv; sigv++)
2440 if (strEQ(sig,*sigv))
2441 return PL_sig_num[sigv - PL_sig_name];
2443 if (strEQ(sig,"CHLD"))
2447 if (strEQ(sig,"CLD"))
2453 #if !defined(PERL_IMPLICIT_CONTEXT)
2458 Perl_sighandler(int sig)
2460 #ifdef PERL_GET_SIG_CONTEXT
2461 dTHXa(PERL_GET_SIG_CONTEXT);
2468 SV *sv = Nullsv, *tSv = PL_Sv;
2474 if (PL_savestack_ix + 15 <= PL_savestack_max)
2476 if (PL_markstack_ptr < PL_markstack_max - 2)
2478 if (PL_retstack_ix < PL_retstack_max - 2)
2480 if (PL_scopestack_ix < PL_scopestack_max - 3)
2483 if (!PL_psig_ptr[sig]) {
2484 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2489 /* Max number of items pushed there is 3*n or 4. We cannot fix
2490 infinity, so we fix 4 (in fact 5): */
2492 PL_savestack_ix += 5; /* Protect save in progress. */
2493 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2496 PL_markstack_ptr++; /* Protect mark. */
2499 PL_retstack[PL_retstack_ix] = NULL;
2502 PL_scopestack_ix += 1;
2503 /* sv_2cv is too complicated, try a simpler variant first: */
2504 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2505 || SvTYPE(cv) != SVt_PVCV)
2506 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2508 if (!cv || !CvROOT(cv)) {
2509 if (ckWARN(WARN_SIGNAL))
2510 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2511 PL_sig_name[sig], (gv ? GvENAME(gv)
2518 if(PL_psig_name[sig]) {
2519 sv = SvREFCNT_inc(PL_psig_name[sig]);
2521 #if !defined(PERL_IMPLICIT_CONTEXT)
2525 sv = sv_newmortal();
2526 sv_setpv(sv,PL_sig_name[sig]);
2529 PUSHSTACKi(PERLSI_SIGNAL);
2534 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2537 if (SvTRUE(ERRSV)) {
2539 #ifdef HAS_SIGPROCMASK
2540 /* Handler "died", for example to get out of a restart-able read().
2541 * Before we re-do that on its behalf re-enable the signal which was
2542 * blocked by the system when we entered.
2546 sigaddset(&set,sig);
2547 sigprocmask(SIG_UNBLOCK, &set, NULL);
2549 /* Not clear if this will work */
2550 (void)rsignal(sig, SIG_IGN);
2551 (void)rsignal(sig, PL_csighandlerp);
2553 #endif /* !PERL_MICRO */
2554 Perl_die(aTHX_ Nullformat);
2558 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2564 PL_scopestack_ix -= 1;
2567 PL_op = myop; /* Apparently not needed... */
2569 PL_Sv = tSv; /* Restore global temporaries. */
2576 restore_magic(pTHX_ void *p)
2578 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2579 SV* sv = mgs->mgs_sv;
2584 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2586 #ifdef PERL_COPY_ON_WRITE
2587 /* While magic was saved (and off) sv_setsv may well have seen
2588 this SV as a prime candidate for COW. */
2590 sv_force_normal(sv);
2594 SvFLAGS(sv) |= mgs->mgs_flags;
2598 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2601 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2603 /* If we're still on top of the stack, pop us off. (That condition
2604 * will be satisfied if restore_magic was called explicitly, but *not*
2605 * if it's being called via leave_scope.)
2606 * The reason for doing this is that otherwise, things like sv_2cv()
2607 * may leave alloc gunk on the savestack, and some code
2608 * (e.g. sighandler) doesn't expect that...
2610 if (PL_savestack_ix == mgs->mgs_ss_ix)
2612 I32 popval = SSPOPINT;
2613 assert(popval == SAVEt_DESTRUCTOR_X);
2614 PL_savestack_ix -= 2;
2616 assert(popval == SAVEt_ALLOC);
2618 PL_savestack_ix -= popval;
2624 unwind_handler_stack(pTHX_ void *p)
2626 U32 flags = *(U32*)p;
2629 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2630 /* cxstack_ix-- Not needed, die already unwound it. */
2631 #if !defined(PERL_IMPLICIT_CONTEXT)
2633 SvREFCNT_dec(sig_sv);