3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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
19 "Magic" is special data attached to SV structures in order to give them
20 "magical" properties. When any Perl code tries to read from, or assign to,
21 an SV marked as magical, it calls the 'get' or 'set' function associated
22 with that SV's magic. A get is called prior to reading an SV, in order to
23 give it a chance to update its internal value (get on $. writes the line
24 number of the last read filehandle into to the SV's IV slot), while
25 set is called after an SV has been written to, in order to allow it to make
26 use of its changed value (set on $/ copies the SV's new value to the
27 PL_rs global variable).
29 Magic is implemented as a linked list of MAGIC structures attached to the
30 SV. Each MAGIC struct holds the type of the magic, a pointer to an array
31 of functions that implement the get(), set(), length() etc functions,
32 plus space for some flags and pointers. For example, a tied variable has
33 a MAGIC structure that contains a pointer to the object associated with the
42 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
48 #if defined(HAS_SETGROUPS)
55 # include <sys/pstat.h>
58 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
59 Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
61 Signal_t Perl_csighandler(int sig);
65 /* Missing protos on LynxOS */
66 void setruid(uid_t id);
67 void seteuid(uid_t id);
68 void setrgid(uid_t id);
69 void setegid(uid_t id);
73 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
81 /* MGS is typedef'ed to struct magic_state in perl.h */
84 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
88 assert(SvMAGICAL(sv));
89 /* Turning READONLY off for a copy-on-write scalar (including shared
90 hash keys) is a bad idea. */
92 sv_force_normal_flags(sv, 0);
94 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
96 mgs = SSPTR(mgs_ix, MGS*);
98 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
99 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
103 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
104 /* No public flags are set, so promote any private flags to public. */
105 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
110 =for apidoc mg_magical
112 Turns on the magical status of an SV. See C<sv_magic>.
118 Perl_mg_magical(pTHX_ SV *sv)
122 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
123 const MGVTBL* const vtbl = mg->mg_virtual;
125 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
129 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
136 /* is this container magic (%ENV, $1 etc), or value magic (pos, taint etc)? */
139 S_is_container_magic(const MAGIC *mg)
141 switch (mg->mg_type) {
144 case PERL_MAGIC_regex_global:
145 case PERL_MAGIC_nkeys:
146 #ifdef USE_LOCALE_COLLATE
147 case PERL_MAGIC_collxfrm:
150 case PERL_MAGIC_taint:
152 case PERL_MAGIC_vstring:
153 case PERL_MAGIC_utf8:
154 case PERL_MAGIC_substr:
155 case PERL_MAGIC_defelem:
156 case PERL_MAGIC_arylen:
158 case PERL_MAGIC_backref:
159 case PERL_MAGIC_arylen_p:
160 case PERL_MAGIC_rhash:
161 case PERL_MAGIC_symtab:
171 Do magic after a value is retrieved from the SV. See C<sv_magic>.
177 Perl_mg_get(pTHX_ SV *sv)
180 const I32 mgs_ix = SSNEW(sizeof(MGS));
181 const bool was_temp = (bool)SvTEMP(sv);
183 MAGIC *newmg, *head, *cur, *mg;
184 /* guard against sv having being freed midway by holding a private
187 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
188 cause the SV's buffer to get stolen (and maybe other stuff).
191 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
196 save_magic(mgs_ix, sv);
198 /* We must call svt_get(sv, mg) for each valid entry in the linked
199 list of magic. svt_get() may delete the current entry, add new
200 magic to the head of the list, or upgrade the SV. AMS 20010810 */
202 newmg = cur = head = mg = SvMAGIC(sv);
204 const MGVTBL * const vtbl = mg->mg_virtual;
206 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
207 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
209 /* guard against magic having been deleted - eg FETCH calling
214 /* Don't restore the flags for this entry if it was deleted. */
215 if (mg->mg_flags & MGf_GSKIP)
216 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
219 mg = mg->mg_moremagic;
222 /* Have we finished with the new entries we saw? Start again
223 where we left off (unless there are more new entries). */
231 /* Were any new entries added? */
232 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
239 restore_magic(INT2PTR(void *, (IV)mgs_ix));
241 if (SvREFCNT(sv) == 1) {
242 /* We hold the last reference to this SV, which implies that the
243 SV was deleted as a side effect of the routines we called. */
252 Do magic after a value is assigned to the SV. See C<sv_magic>.
258 Perl_mg_set(pTHX_ SV *sv)
261 const I32 mgs_ix = SSNEW(sizeof(MGS));
265 save_magic(mgs_ix, sv);
267 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
268 const MGVTBL* vtbl = mg->mg_virtual;
269 nextmg = mg->mg_moremagic; /* it may delete itself */
270 if (mg->mg_flags & MGf_GSKIP) {
271 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
272 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
274 if (PL_localizing == 2 && !S_is_container_magic(mg))
276 if (vtbl && vtbl->svt_set)
277 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
280 restore_magic(INT2PTR(void*, (IV)mgs_ix));
285 =for apidoc mg_length
287 Report on the SV's length. See C<sv_magic>.
293 Perl_mg_length(pTHX_ SV *sv)
299 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
300 const MGVTBL * const vtbl = mg->mg_virtual;
301 if (vtbl && vtbl->svt_len) {
302 const I32 mgs_ix = SSNEW(sizeof(MGS));
303 save_magic(mgs_ix, sv);
304 /* omit MGf_GSKIP -- not changed here */
305 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
306 restore_magic(INT2PTR(void*, (IV)mgs_ix));
312 const U8 *s = (U8*)SvPV_const(sv, len);
313 len = utf8_length(s, s + len);
316 (void)SvPV_const(sv, len);
321 Perl_mg_size(pTHX_ SV *sv)
325 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
326 const MGVTBL* const vtbl = mg->mg_virtual;
327 if (vtbl && vtbl->svt_len) {
328 const I32 mgs_ix = SSNEW(sizeof(MGS));
330 save_magic(mgs_ix, sv);
331 /* omit MGf_GSKIP -- not changed here */
332 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
333 restore_magic(INT2PTR(void*, (IV)mgs_ix));
340 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
344 Perl_croak(aTHX_ "Size magic not implemented");
353 Clear something magical that the SV represents. See C<sv_magic>.
359 Perl_mg_clear(pTHX_ SV *sv)
361 const I32 mgs_ix = SSNEW(sizeof(MGS));
364 save_magic(mgs_ix, sv);
366 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
367 const MGVTBL* const vtbl = mg->mg_virtual;
368 /* omit GSKIP -- never set here */
370 if (vtbl && vtbl->svt_clear)
371 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
374 restore_magic(INT2PTR(void*, (IV)mgs_ix));
381 Finds the magic pointer for type matching the SV. See C<sv_magic>.
387 Perl_mg_find(pTHX_ const SV *sv, int type)
392 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
393 if (mg->mg_type == type)
403 Copies the magic from one SV to another. See C<sv_magic>.
409 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
413 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
414 const MGVTBL* const vtbl = mg->mg_virtual;
415 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
416 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
419 const char type = mg->mg_type;
420 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
422 (type == PERL_MAGIC_tied)
424 : (type == PERL_MAGIC_regdata && mg->mg_obj)
427 toLOWER(type), key, klen);
436 =for apidoc mg_localize
438 Copy some of the magic from an existing SV to new localized version of
439 that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
440 doesn't (eg taint, pos).
446 Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
450 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
451 const MGVTBL* const vtbl = mg->mg_virtual;
452 if (!S_is_container_magic(mg))
455 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
456 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
458 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
459 mg->mg_ptr, mg->mg_len);
461 /* container types should remain read-only across localization */
462 SvFLAGS(nsv) |= SvREADONLY(sv);
465 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
466 SvFLAGS(nsv) |= SvMAGICAL(sv);
476 Free any magic storage used by the SV. See C<sv_magic>.
482 Perl_mg_free(pTHX_ SV *sv)
486 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
487 const MGVTBL* const vtbl = mg->mg_virtual;
488 moremagic = mg->mg_moremagic;
489 if (vtbl && vtbl->svt_free)
490 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
491 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
492 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
493 Safefree(mg->mg_ptr);
494 else if (mg->mg_len == HEf_SVKEY)
495 SvREFCNT_dec((SV*)mg->mg_ptr);
497 if (mg->mg_flags & MGf_REFCOUNTED)
498 SvREFCNT_dec(mg->mg_obj);
501 SvMAGIC_set(sv, NULL);
508 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
514 register const REGEXP * const rx = PM_GETRE(PL_curpm);
516 if (mg->mg_obj) { /* @+ */
517 /* return the number possible */
520 I32 paren = rx->lastparen;
522 /* return the last filled */
524 && (rx->offs[paren].start == -1
525 || rx->offs[paren].end == -1) )
536 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
540 register const REGEXP * const rx = PM_GETRE(PL_curpm);
542 register const I32 paren = mg->mg_len;
547 if (paren <= (I32)rx->nparens &&
548 (s = rx->offs[paren].start) != -1 &&
549 (t = rx->offs[paren].end) != -1)
552 if (mg->mg_obj) /* @+ */
557 if (i > 0 && RX_MATCH_UTF8(rx)) {
558 const char * const b = rx->subbeg;
560 i = utf8_length((U8*)b, (U8*)(b+i));
571 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
575 Perl_croak(aTHX_ PL_no_modify);
576 NORETURN_FUNCTION_END;
580 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
585 register const REGEXP * rx;
586 const char * const remaining = mg->mg_ptr + 1;
588 switch (*mg->mg_ptr) {
590 if (*remaining == '\0') { /* ^P */
592 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
594 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
598 case '\015': /* $^MATCH */
599 if (strEQ(remaining, "ATCH")) {
606 paren = RX_BUFF_IDX_PREMATCH;
610 paren = RX_BUFF_IDX_POSTMATCH;
614 paren = RX_BUFF_IDX_FULLMATCH;
616 case '1': case '2': case '3': case '4':
617 case '5': case '6': case '7': case '8': case '9':
618 paren = atoi(mg->mg_ptr);
620 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
622 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
625 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
628 if (ckWARN(WARN_UNINITIALIZED))
633 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
634 paren = rx->lastparen;
639 case '\016': /* ^N */
640 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
641 paren = rx->lastcloseparen;
648 if (!SvPOK(sv) && SvNIOK(sv)) {
656 #define SvRTRIM(sv) STMT_START { \
658 STRLEN len = SvCUR(sv); \
659 char * const p = SvPVX(sv); \
660 while (len > 0 && isSPACE(p[len-1])) \
662 SvCUR_set(sv, len); \
668 Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
670 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
671 sv_setsv(sv, &PL_sv_undef);
675 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
676 SV *const value = Perl_refcounted_he_fetch(aTHX_
678 0, "open<", 5, 0, 0);
683 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
684 SV *const value = Perl_refcounted_he_fetch(aTHX_
686 0, "open>", 5, 0, 0);
694 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
698 register char *s = NULL;
700 const char * const remaining = mg->mg_ptr + 1;
701 const char nextchar = *remaining;
703 switch (*mg->mg_ptr) {
704 case '\001': /* ^A */
705 sv_setsv(sv, PL_bodytarget);
707 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
708 if (nextchar == '\0') {
709 sv_setiv(sv, (IV)PL_minus_c);
711 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
712 sv_setiv(sv, (IV)STATUS_NATIVE);
716 case '\004': /* ^D */
717 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
719 case '\005': /* ^E */
720 if (nextchar == '\0') {
721 #if defined(MACOS_TRADITIONAL)
725 sv_setnv(sv,(double)gMacPerl_OSErr);
726 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
730 # include <descrip.h>
731 # include <starlet.h>
733 $DESCRIPTOR(msgdsc,msg);
734 sv_setnv(sv,(NV) vaxc$errno);
735 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
736 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
741 if (!(_emx_env & 0x200)) { /* Under DOS */
742 sv_setnv(sv, (NV)errno);
743 sv_setpv(sv, errno ? Strerror(errno) : "");
745 if (errno != errno_isOS2) {
746 const int tmp = _syserrno();
747 if (tmp) /* 2nd call to _syserrno() makes it 0 */
750 sv_setnv(sv, (NV)Perl_rc);
751 sv_setpv(sv, os2error(Perl_rc));
755 const DWORD dwErr = GetLastError();
756 sv_setnv(sv, (NV)dwErr);
758 PerlProc_GetOSError(sv, dwErr);
761 sv_setpvn(sv, "", 0);
766 const int saveerrno = errno;
767 sv_setnv(sv, (NV)errno);
768 sv_setpv(sv, errno ? Strerror(errno) : "");
773 SvNOK_on(sv); /* what a wonderful hack! */
775 else if (strEQ(remaining, "NCODING"))
776 sv_setsv(sv, PL_encoding);
778 case '\006': /* ^F */
779 sv_setiv(sv, (IV)PL_maxsysfd);
781 case '\010': /* ^H */
782 sv_setiv(sv, (IV)PL_hints);
784 case '\011': /* ^I */ /* NOT \t in EBCDIC */
786 sv_setpv(sv, PL_inplace);
788 sv_setsv(sv, &PL_sv_undef);
790 case '\017': /* ^O & ^OPEN */
791 if (nextchar == '\0') {
792 sv_setpv(sv, PL_osname);
795 else if (strEQ(remaining, "PEN")) {
796 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
800 if (nextchar == '\0') { /* ^P */
801 sv_setiv(sv, (IV)PL_perldb);
802 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
803 goto do_prematch_fetch;
804 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
805 goto do_postmatch_fetch;
808 case '\023': /* ^S */
809 if (nextchar == '\0') {
810 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
813 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
818 case '\024': /* ^T */
819 if (nextchar == '\0') {
821 sv_setnv(sv, PL_basetime);
823 sv_setiv(sv, (IV)PL_basetime);
826 else if (strEQ(remaining, "AINT"))
827 sv_setiv(sv, PL_tainting
828 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
831 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
832 if (strEQ(remaining, "NICODE"))
833 sv_setuv(sv, (UV) PL_unicode);
834 else if (strEQ(remaining, "TF8LOCALE"))
835 sv_setuv(sv, (UV) PL_utf8locale);
836 else if (strEQ(remaining, "TF8CACHE"))
837 sv_setiv(sv, (IV) PL_utf8cache);
839 case '\027': /* ^W & $^WARNING_BITS */
840 if (nextchar == '\0')
841 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
842 else if (strEQ(remaining, "ARNING_BITS")) {
843 if (PL_compiling.cop_warnings == pWARN_NONE) {
844 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
846 else if (PL_compiling.cop_warnings == pWARN_STD) {
849 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
853 else if (PL_compiling.cop_warnings == pWARN_ALL) {
854 /* Get the bit mask for $warnings::Bits{all}, because
855 * it could have been extended by warnings::register */
856 HV * const bits=get_hv("warnings::Bits", FALSE);
858 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
860 sv_setsv(sv, *bits_all);
863 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
867 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
868 *PL_compiling.cop_warnings);
873 case '\015': /* $^MATCH */
874 if (strEQ(remaining, "ATCH")) {
875 case '1': case '2': case '3': case '4':
876 case '5': case '6': case '7': case '8': case '9': case '&':
877 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
879 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
880 * XXX Does the new way break anything?
882 paren = atoi(mg->mg_ptr); /* $& is in [0] */
883 CALLREG_NUMBUF_FETCH(rx,paren,sv);
886 sv_setsv(sv,&PL_sv_undef);
890 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
892 CALLREG_NUMBUF_FETCH(rx,rx->lastparen,sv);
896 sv_setsv(sv,&PL_sv_undef);
898 case '\016': /* ^N */
899 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
900 if (rx->lastcloseparen) {
901 CALLREG_NUMBUF_FETCH(rx,rx->lastcloseparen,sv);
906 sv_setsv(sv,&PL_sv_undef);
910 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
911 CALLREG_NUMBUF_FETCH(rx,-2,sv);
914 sv_setsv(sv,&PL_sv_undef);
918 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
919 CALLREG_NUMBUF_FETCH(rx,-1,sv);
922 sv_setsv(sv,&PL_sv_undef);
925 if (GvIO(PL_last_in_gv)) {
926 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
931 sv_setiv(sv, (IV)STATUS_CURRENT);
932 #ifdef COMPLEX_STATUS
933 LvTARGOFF(sv) = PL_statusvalue;
934 LvTARGLEN(sv) = PL_statusvalue_vms;
939 if (GvIOp(PL_defoutgv))
940 s = IoTOP_NAME(GvIOp(PL_defoutgv));
944 sv_setpv(sv,GvENAME(PL_defoutgv));
949 if (GvIOp(PL_defoutgv))
950 s = IoFMT_NAME(GvIOp(PL_defoutgv));
952 s = GvENAME(PL_defoutgv);
956 if (GvIOp(PL_defoutgv))
957 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
960 if (GvIOp(PL_defoutgv))
961 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
964 if (GvIOp(PL_defoutgv))
965 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
972 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
975 if (GvIOp(PL_defoutgv))
976 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
982 sv_copypv(sv, PL_ors_sv);
986 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
987 sv_setpv(sv, errno ? Strerror(errno) : "");
990 const int saveerrno = errno;
991 sv_setnv(sv, (NV)errno);
993 if (errno == errno_isOS2 || errno == errno_isOS2_set)
994 sv_setpv(sv, os2error(Perl_rc));
997 sv_setpv(sv, errno ? Strerror(errno) : "");
1002 SvNOK_on(sv); /* what a wonderful hack! */
1005 sv_setiv(sv, (IV)PL_uid);
1008 sv_setiv(sv, (IV)PL_euid);
1011 sv_setiv(sv, (IV)PL_gid);
1014 sv_setiv(sv, (IV)PL_egid);
1016 #ifdef HAS_GETGROUPS
1018 Groups_t *gary = NULL;
1019 I32 i, num_groups = getgroups(0, gary);
1020 Newx(gary, num_groups, Groups_t);
1021 num_groups = getgroups(num_groups, gary);
1022 for (i = 0; i < num_groups; i++)
1023 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
1026 (void)SvIOK_on(sv); /* what a wonderful hack! */
1029 #ifndef MACOS_TRADITIONAL
1038 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
1040 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
1042 if (uf && uf->uf_val)
1043 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
1048 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
1051 STRLEN len = 0, klen;
1052 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
1053 const char * const ptr = MgPV_const(mg,klen);
1056 #ifdef DYNAMIC_ENV_FETCH
1057 /* We just undefd an environment var. Is a replacement */
1058 /* waiting in the wings? */
1060 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1062 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
1066 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
1067 /* And you'll never guess what the dog had */
1068 /* in its mouth... */
1070 MgTAINTEDDIR_off(mg);
1072 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
1073 char pathbuf[256], eltbuf[256], *cp, *elt;
1077 my_strlcpy(eltbuf, s, sizeof(eltbuf));
1079 do { /* DCL$PATH may be a search list */
1080 while (1) { /* as may dev portion of any element */
1081 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1082 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1083 cando_by_name(S_IWUSR,0,elt) ) {
1084 MgTAINTEDDIR_on(mg);
1088 if ((cp = strchr(elt, ':')) != NULL)
1090 if (my_trnlnm(elt, eltbuf, j++))
1096 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1099 if (s && klen == 4 && strEQ(ptr,"PATH")) {
1100 const char * const strend = s + len;
1102 while (s < strend) {
1106 #ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1107 const char path_sep = '|';
1109 const char path_sep = ':';
1111 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
1112 s, strend, path_sep, &i);
1114 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
1116 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1118 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1120 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
1121 MgTAINTEDDIR_on(mg);
1127 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1133 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
1135 PERL_UNUSED_ARG(sv);
1136 my_setenv(MgPV_nolen_const(mg),NULL);
1141 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1144 PERL_UNUSED_ARG(mg);
1146 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1148 if (PL_localizing) {
1151 hv_iterinit((HV*)sv);
1152 while ((entry = hv_iternext((HV*)sv))) {
1154 my_setenv(hv_iterkey(entry, &keylen),
1155 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
1163 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1166 PERL_UNUSED_ARG(sv);
1167 PERL_UNUSED_ARG(mg);
1169 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1177 #ifdef HAS_SIGPROCMASK
1179 restore_sigmask(pTHX_ SV *save_sv)
1181 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
1182 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
1186 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1189 /* Are we fetching a signal entry? */
1190 const I32 i = whichsig(MgPV_nolen_const(mg));
1193 sv_setsv(sv,PL_psig_ptr[i]);
1195 Sighandler_t sigstate = rsignal_state(i);
1196 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1197 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1200 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1201 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1204 /* cache state so we don't fetch it again */
1205 if(sigstate == (Sighandler_t) SIG_IGN)
1206 sv_setpvs(sv,"IGNORE");
1208 sv_setsv(sv,&PL_sv_undef);
1209 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1216 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1218 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1219 * refactoring might be in order.
1222 register const char * const s = MgPV_nolen_const(mg);
1223 PERL_UNUSED_ARG(sv);
1226 if (strEQ(s,"__DIE__"))
1228 else if (strEQ(s,"__WARN__") && PL_warnhook != PERL_WARNHOOK_FATAL)
1231 SV *const to_dec = *svp;
1233 SvREFCNT_dec(to_dec);
1237 /* Are we clearing a signal entry? */
1238 const I32 i = whichsig(s);
1240 #ifdef HAS_SIGPROCMASK
1243 /* Avoid having the signal arrive at a bad time, if possible. */
1246 sigprocmask(SIG_BLOCK, &set, &save);
1248 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1249 SAVEFREESV(save_sv);
1250 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1253 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1254 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1256 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1257 PL_sig_defaulting[i] = 1;
1258 (void)rsignal(i, PL_csighandlerp);
1260 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1262 if(PL_psig_name[i]) {
1263 SvREFCNT_dec(PL_psig_name[i]);
1266 if(PL_psig_ptr[i]) {
1267 SV * const to_dec=PL_psig_ptr[i];
1270 SvREFCNT_dec(to_dec);
1280 * The signal handling nomenclature has gotten a bit confusing since the advent of
1281 * safe signals. S_raise_signal only raises signals by analogy with what the
1282 * underlying system's signal mechanism does. It might be more proper to say that
1283 * it defers signals that have already been raised and caught.
1285 * PL_sig_pending and PL_psig_pend likewise do not track signals that are pending
1286 * in the sense of being on the system's signal queue in between raising and delivery.
1287 * They are only pending on Perl's deferral list, i.e., they track deferred signals
1288 * awaiting delivery after the current Perl opcode completes and say nothing about
1289 * signals raised but not yet caught in the underlying signal implementation.
1292 #ifndef SIG_PENDING_DIE_COUNT
1293 # define SIG_PENDING_DIE_COUNT 120
1297 S_raise_signal(pTHX_ int sig)
1300 /* Set a flag to say this signal is pending */
1301 PL_psig_pend[sig]++;
1302 /* And one to say _a_ signal is pending */
1303 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1304 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1305 (unsigned long)SIG_PENDING_DIE_COUNT);
1309 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1310 Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
1312 Perl_csighandler(int sig)
1315 #ifdef PERL_GET_SIG_CONTEXT
1316 dTHXa(PERL_GET_SIG_CONTEXT);
1320 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1322 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1323 (void) rsignal(sig, PL_csighandlerp);
1324 if (PL_sig_ignoring[sig]) return;
1326 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1327 if (PL_sig_defaulting[sig])
1328 #ifdef KILL_BY_SIGPRC
1329 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1334 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1346 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
1347 /* Call the perl level handler now--
1348 * with risk we may be in malloc() etc. */
1350 (*PL_sighandlerp)(sig);
1352 (*PL_sighandlerp)(sig, NULL, NULL);
1355 S_raise_signal(aTHX_ sig);
1356 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1360 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1362 Perl_csighandler_init(void)
1365 if (PL_sig_handlers_initted) return;
1367 for (sig = 1; sig < SIG_SIZE; sig++) {
1368 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1370 PL_sig_defaulting[sig] = 1;
1371 (void) rsignal(sig, PL_csighandlerp);
1373 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1374 PL_sig_ignoring[sig] = 0;
1377 PL_sig_handlers_initted = 1;
1382 Perl_despatch_signals(pTHX)
1387 for (sig = 1; sig < SIG_SIZE; sig++) {
1388 if (PL_psig_pend[sig]) {
1389 PERL_BLOCKSIG_ADD(set, sig);
1390 PL_psig_pend[sig] = 0;
1391 PERL_BLOCKSIG_BLOCK(set);
1393 (*PL_sighandlerp)(sig);
1395 (*PL_sighandlerp)(sig, NULL, NULL);
1397 PERL_BLOCKSIG_UNBLOCK(set);
1403 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1408 /* Need to be careful with SvREFCNT_dec(), because that can have side
1409 * effects (due to closures). We must make sure that the new disposition
1410 * is in place before it is called.
1414 #ifdef HAS_SIGPROCMASK
1419 register const char *s = MgPV_const(mg,len);
1421 if (strEQ(s,"__DIE__"))
1423 else if (strEQ(s,"__WARN__"))
1426 Perl_croak(aTHX_ "No such hook: %s", s);
1429 if (*svp != PERL_WARNHOOK_FATAL)
1435 i = whichsig(s); /* ...no, a brick */
1437 if (ckWARN(WARN_SIGNAL))
1438 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1441 #ifdef HAS_SIGPROCMASK
1442 /* Avoid having the signal arrive at a bad time, if possible. */
1445 sigprocmask(SIG_BLOCK, &set, &save);
1447 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1448 SAVEFREESV(save_sv);
1449 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1452 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1453 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1455 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1456 PL_sig_ignoring[i] = 0;
1458 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1459 PL_sig_defaulting[i] = 0;
1461 SvREFCNT_dec(PL_psig_name[i]);
1462 to_dec = PL_psig_ptr[i];
1463 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1464 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1465 PL_psig_name[i] = newSVpvn(s, len);
1466 SvREADONLY_on(PL_psig_name[i]);
1468 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1470 (void)rsignal(i, PL_csighandlerp);
1471 #ifdef HAS_SIGPROCMASK
1476 *svp = SvREFCNT_inc_simple_NN(sv);
1478 SvREFCNT_dec(to_dec);
1481 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
1482 if (strEQ(s,"IGNORE")) {
1484 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1485 PL_sig_ignoring[i] = 1;
1486 (void)rsignal(i, PL_csighandlerp);
1488 (void)rsignal(i, (Sighandler_t) SIG_IGN);
1492 else if (strEQ(s,"DEFAULT") || !*s) {
1494 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1496 PL_sig_defaulting[i] = 1;
1497 (void)rsignal(i, PL_csighandlerp);
1500 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1505 * We should warn if HINT_STRICT_REFS, but without
1506 * access to a known hint bit in a known OP, we can't
1507 * tell whether HINT_STRICT_REFS is in force or not.
1509 if (!strchr(s,':') && !strchr(s,'\''))
1510 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
1512 (void)rsignal(i, PL_csighandlerp);
1514 *svp = SvREFCNT_inc_simple_NN(sv);
1516 #ifdef HAS_SIGPROCMASK
1521 SvREFCNT_dec(to_dec);
1524 #endif /* !PERL_MICRO */
1527 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1531 PERL_UNUSED_ARG(sv);
1533 /* Bail out if destruction is going on */
1534 if(PL_dirty) return 0;
1536 /* Skip _isaelem because _isa will handle it shortly */
1537 if (PL_delaymagic & DM_ARRAY && mg->mg_type == PERL_MAGIC_isaelem)
1540 /* XXX Once it's possible, we need to
1541 detect that our @ISA is aliased in
1542 other stashes, and act on the stashes
1543 of all of the aliases */
1545 /* The first case occurs via setisa,
1546 the second via setisa_elem, which
1547 calls this same magic */
1549 SvTYPE(mg->mg_obj) == SVt_PVGV
1551 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
1554 mro_isa_changed_in(stash);
1560 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1563 PERL_UNUSED_ARG(sv);
1564 PERL_UNUSED_ARG(mg);
1565 PL_amagic_generation++;
1571 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1573 HV * const hv = (HV*)LvTARG(sv);
1575 PERL_UNUSED_ARG(mg);
1578 (void) hv_iterinit(hv);
1579 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1582 while (hv_iternext(hv))
1587 sv_setiv(sv, (IV)i);
1592 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1594 PERL_UNUSED_ARG(mg);
1596 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1601 /* caller is responsible for stack switching/cleanup */
1603 S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
1610 PUSHs(SvTIED_obj(sv, mg));
1613 if (mg->mg_len >= 0)
1614 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1615 else if (mg->mg_len == HEf_SVKEY)
1616 PUSHs((SV*)mg->mg_ptr);
1618 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1619 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1627 return call_method(meth, flags);
1631 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
1637 PUSHSTACKi(PERLSI_MAGIC);
1639 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1640 sv_setsv(sv, *PL_stack_sp--);
1650 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1653 mg->mg_flags |= MGf_GSKIP;
1654 magic_methpack(sv,mg,"FETCH");
1659 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1663 PUSHSTACKi(PERLSI_MAGIC);
1664 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1671 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1673 return magic_methpack(sv,mg,"DELETE");
1678 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1685 PUSHSTACKi(PERLSI_MAGIC);
1686 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1687 sv = *PL_stack_sp--;
1688 retval = SvIV(sv)-1;
1690 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
1695 return (U32) retval;
1699 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1704 PUSHSTACKi(PERLSI_MAGIC);
1706 XPUSHs(SvTIED_obj(sv, mg));
1708 call_method("CLEAR", G_SCALAR|G_DISCARD);
1716 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1719 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1723 PUSHSTACKi(PERLSI_MAGIC);
1726 PUSHs(SvTIED_obj(sv, mg));
1731 if (call_method(meth, G_SCALAR))
1732 sv_setsv(key, *PL_stack_sp--);
1741 Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
1743 return magic_methpack(sv,mg,"EXISTS");
1747 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1751 SV * const tied = SvTIED_obj((SV*)hv, mg);
1752 HV * const pkg = SvSTASH((SV*)SvRV(tied));
1754 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1756 if (HvEITER_get(hv))
1757 /* we are in an iteration so the hash cannot be empty */
1759 /* no xhv_eiter so now use FIRSTKEY */
1760 key = sv_newmortal();
1761 magic_nextpack((SV*)hv, mg, key);
1762 HvEITER_set(hv, NULL); /* need to reset iterator */
1763 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1766 /* there is a SCALAR method that we can call */
1768 PUSHSTACKi(PERLSI_MAGIC);
1774 if (call_method("SCALAR", G_SCALAR))
1775 retval = *PL_stack_sp--;
1777 retval = &PL_sv_undef;
1784 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1787 GV * const gv = PL_DBline;
1788 const I32 i = SvTRUE(sv);
1789 SV ** const svp = av_fetch(GvAV(gv),
1790 atoi(MgPV_nolen_const(mg)), FALSE);
1791 if (svp && SvIOKp(*svp)) {
1792 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1794 /* set or clear breakpoint in the relevant control op */
1796 o->op_flags |= OPf_SPECIAL;
1798 o->op_flags &= ~OPf_SPECIAL;
1805 Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
1808 const AV * const obj = (AV*)mg->mg_obj;
1810 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
1818 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1821 AV * const obj = (AV*)mg->mg_obj;
1823 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
1825 if (ckWARN(WARN_MISC))
1826 Perl_warner(aTHX_ packWARN(WARN_MISC),
1827 "Attempt to set length of freed array");
1833 Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1836 PERL_UNUSED_ARG(sv);
1837 /* during global destruction, mg_obj may already have been freed */
1838 if (PL_in_clean_all)
1841 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1844 /* arylen scalar holds a pointer back to the array, but doesn't own a
1845 reference. Hence the we (the array) are about to go away with it
1846 still pointing at us. Clear its pointer, else it would be pointing
1847 at free memory. See the comment in sv_magic about reference loops,
1848 and why it can't own a reference to us. */
1855 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1858 SV* const lsv = LvTARG(sv);
1859 PERL_UNUSED_ARG(mg);
1861 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1862 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1863 if (found && found->mg_len >= 0) {
1864 I32 i = found->mg_len;
1866 sv_pos_b2u(lsv, &i);
1867 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
1876 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1879 SV* const lsv = LvTARG(sv);
1885 PERL_UNUSED_ARG(mg);
1887 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1888 found = mg_find(lsv, PERL_MAGIC_regex_global);
1894 #ifdef PERL_OLD_COPY_ON_WRITE
1896 sv_force_normal_flags(lsv, 0);
1898 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
1901 else if (!SvOK(sv)) {
1905 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1907 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
1910 ulen = sv_len_utf8(lsv);
1920 else if (pos > (SSize_t)len)
1925 sv_pos_u2b(lsv, &p, 0);
1929 found->mg_len = pos;
1930 found->mg_flags &= ~MGf_MINMATCH;
1936 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1939 PERL_UNUSED_ARG(mg);
1941 Perl_croak(aTHX_ "Perl_magic_setglob is dead code?");
1945 if (isGV_with_GP(sv)) {
1946 /* We're actually already a typeglob, so don't need the stuff below.
1950 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
1955 GvGP(sv) = gp_ref(GvGP(gv));
1960 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1963 SV * const lsv = LvTARG(sv);
1964 const char * const tmps = SvPV_const(lsv,len);
1965 I32 offs = LvTARGOFF(sv);
1966 I32 rem = LvTARGLEN(sv);
1967 PERL_UNUSED_ARG(mg);
1970 sv_pos_u2b(lsv, &offs, &rem);
1971 if (offs > (I32)len)
1973 if (rem + offs > (I32)len)
1975 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1982 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1986 const char * const tmps = SvPV_const(sv, len);
1987 SV * const lsv = LvTARG(sv);
1988 I32 lvoff = LvTARGOFF(sv);
1989 I32 lvlen = LvTARGLEN(sv);
1990 PERL_UNUSED_ARG(mg);
1993 sv_utf8_upgrade(lsv);
1994 sv_pos_u2b(lsv, &lvoff, &lvlen);
1995 sv_insert(lsv, lvoff, lvlen, tmps, len);
1996 LvTARGLEN(sv) = sv_len_utf8(sv);
1999 else if (lsv && SvUTF8(lsv)) {
2001 sv_pos_u2b(lsv, &lvoff, &lvlen);
2002 LvTARGLEN(sv) = len;
2003 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
2004 sv_insert(lsv, lvoff, lvlen, utf8, len);
2008 sv_insert(lsv, lvoff, lvlen, tmps, len);
2009 LvTARGLEN(sv) = len;
2017 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
2020 PERL_UNUSED_ARG(sv);
2021 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
2026 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
2029 PERL_UNUSED_ARG(sv);
2030 /* update taint status */
2039 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
2041 SV * const lsv = LvTARG(sv);
2042 PERL_UNUSED_ARG(mg);
2045 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2053 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
2055 PERL_UNUSED_ARG(mg);
2056 do_vecset(sv); /* XXX slurp this routine */
2061 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
2065 if (LvTARGLEN(sv)) {
2067 SV * const ahv = LvTARG(sv);
2068 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
2073 AV* const av = (AV*)LvTARG(sv);
2074 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2075 targ = AvARRAY(av)[LvTARGOFF(sv)];
2077 if (targ && (targ != &PL_sv_undef)) {
2078 /* somebody else defined it for us */
2079 SvREFCNT_dec(LvTARG(sv));
2080 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
2082 SvREFCNT_dec(mg->mg_obj);
2084 mg->mg_flags &= ~MGf_REFCOUNTED;
2089 sv_setsv(sv, targ ? targ : &PL_sv_undef);
2094 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
2096 PERL_UNUSED_ARG(mg);
2100 sv_setsv(LvTARG(sv), sv);
2101 SvSETMAGIC(LvTARG(sv));
2107 Perl_vivify_defelem(pTHX_ SV *sv)
2113 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
2116 SV * const ahv = LvTARG(sv);
2117 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
2120 if (!value || value == &PL_sv_undef)
2121 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
2124 AV* const av = (AV*)LvTARG(sv);
2125 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
2126 LvTARG(sv) = NULL; /* array can't be extended */
2128 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
2129 if (!svp || (value = *svp) == &PL_sv_undef)
2130 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
2133 SvREFCNT_inc_simple_void(value);
2134 SvREFCNT_dec(LvTARG(sv));
2137 SvREFCNT_dec(mg->mg_obj);
2139 mg->mg_flags &= ~MGf_REFCOUNTED;
2143 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
2145 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
2149 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
2151 PERL_UNUSED_CONTEXT;
2158 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
2160 PERL_UNUSED_ARG(mg);
2161 sv_unmagic(sv, PERL_MAGIC_bm);
2168 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
2170 PERL_UNUSED_ARG(mg);
2171 sv_unmagic(sv, PERL_MAGIC_fm);
2177 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2179 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2181 if (uf && uf->uf_set)
2182 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2187 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2189 PERL_UNUSED_ARG(mg);
2190 sv_unmagic(sv, PERL_MAGIC_qr);
2195 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
2198 regexp * const re = (regexp *)mg->mg_obj;
2199 PERL_UNUSED_ARG(sv);
2205 #ifdef USE_LOCALE_COLLATE
2207 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2210 * RenE<eacute> Descartes said "I think not."
2211 * and vanished with a faint plop.
2213 PERL_UNUSED_CONTEXT;
2214 PERL_UNUSED_ARG(sv);
2216 Safefree(mg->mg_ptr);
2222 #endif /* USE_LOCALE_COLLATE */
2224 /* Just clear the UTF-8 cache data. */
2226 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2228 PERL_UNUSED_CONTEXT;
2229 PERL_UNUSED_ARG(sv);
2230 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2232 mg->mg_len = -1; /* The mg_len holds the len cache. */
2237 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2240 register const char *s;
2242 register const REGEXP * rx;
2243 const char * const remaining = mg->mg_ptr + 1;
2247 switch (*mg->mg_ptr) {
2248 case '\015': /* $^MATCH */
2249 if (strEQ(remaining, "ATCH"))
2251 case '`': /* ${^PREMATCH} caught below */
2253 paren = RX_BUFF_IDX_PREMATCH;
2255 case '\'': /* ${^POSTMATCH} caught below */
2257 paren = RX_BUFF_IDX_POSTMATCH;
2261 paren = RX_BUFF_IDX_FULLMATCH;
2263 case '1': case '2': case '3': case '4':
2264 case '5': case '6': case '7': case '8': case '9':
2265 paren = atoi(mg->mg_ptr);
2267 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2268 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2271 /* Croak with a READONLY error when a numbered match var is
2272 * set without a previous pattern match. Unless it's C<local $1>
2274 if (!PL_localizing) {
2275 Perl_croak(aTHX_ PL_no_modify);
2278 case '\001': /* ^A */
2279 sv_setsv(PL_bodytarget, sv);
2281 case '\003': /* ^C */
2282 PL_minus_c = (bool)SvIV(sv);
2285 case '\004': /* ^D */
2287 s = SvPV_nolen_const(sv);
2288 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2289 DEBUG_x(dump_all());
2291 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
2294 case '\005': /* ^E */
2295 if (*(mg->mg_ptr+1) == '\0') {
2296 #ifdef MACOS_TRADITIONAL
2297 gMacPerl_OSErr = SvIV(sv);
2300 set_vaxc_errno(SvIV(sv));
2303 SetLastError( SvIV(sv) );
2306 os2_setsyserrno(SvIV(sv));
2308 /* will anyone ever use this? */
2309 SETERRNO(SvIV(sv), 4);
2315 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2317 SvREFCNT_dec(PL_encoding);
2318 if (SvOK(sv) || SvGMAGICAL(sv)) {
2319 PL_encoding = newSVsv(sv);
2326 case '\006': /* ^F */
2327 PL_maxsysfd = SvIV(sv);
2329 case '\010': /* ^H */
2330 PL_hints = SvIV(sv);
2332 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2333 Safefree(PL_inplace);
2334 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
2336 case '\017': /* ^O */
2337 if (*(mg->mg_ptr+1) == '\0') {
2338 Safefree(PL_osname);
2341 TAINT_PROPER("assigning to $^O");
2342 PL_osname = savesvpv(sv);
2345 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2347 const char *const start = SvPV(sv, len);
2348 const char *out = (const char*)memchr(start, '\0', len);
2350 struct refcounted_he *tmp_he;
2353 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2355 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2357 /* Opening for input is more common than opening for output, so
2358 ensure that hints for input are sooner on linked list. */
2359 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2361 SvFLAGS(tmp) |= SvUTF8(sv);
2364 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2365 sv_2mortal(newSVpvs("open>")), tmp);
2367 /* The UTF-8 setting is carried over */
2368 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2370 PL_compiling.cop_hints_hash
2371 = Perl_refcounted_he_new(aTHX_ tmp_he,
2372 sv_2mortal(newSVpvs("open<")), tmp);
2375 case '\020': /* ^P */
2376 if (*remaining == '\0') { /* ^P */
2377 PL_perldb = SvIV(sv);
2378 if (PL_perldb && !PL_DBsingle)
2381 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2383 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2386 case '\024': /* ^T */
2388 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2390 PL_basetime = (Time_t)SvIV(sv);
2393 case '\025': /* ^UTF8CACHE */
2394 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2395 PL_utf8cache = (signed char) sv_2iv(sv);
2398 case '\027': /* ^W & $^WARNING_BITS */
2399 if (*(mg->mg_ptr+1) == '\0') {
2400 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2402 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2403 | (i ? G_WARN_ON : G_WARN_OFF) ;
2406 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2407 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2408 if (!SvPOK(sv) && PL_localizing) {
2409 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2410 PL_compiling.cop_warnings = pWARN_NONE;
2415 int accumulate = 0 ;
2416 int any_fatals = 0 ;
2417 const char * const ptr = SvPV_const(sv, len) ;
2418 for (i = 0 ; i < len ; ++i) {
2419 accumulate |= ptr[i] ;
2420 any_fatals |= (ptr[i] & 0xAA) ;
2423 if (!specialWARN(PL_compiling.cop_warnings))
2424 PerlMemShared_free(PL_compiling.cop_warnings);
2425 PL_compiling.cop_warnings = pWARN_NONE;
2427 /* Yuck. I can't see how to abstract this: */
2428 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2429 WARN_ALL) && !any_fatals) {
2430 if (!specialWARN(PL_compiling.cop_warnings))
2431 PerlMemShared_free(PL_compiling.cop_warnings);
2432 PL_compiling.cop_warnings = pWARN_ALL;
2433 PL_dowarn |= G_WARN_ONCE ;
2437 const char *const p = SvPV_const(sv, len);
2439 PL_compiling.cop_warnings
2440 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
2443 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2444 PL_dowarn |= G_WARN_ONCE ;
2452 if (PL_localizing) {
2453 if (PL_localizing == 1)
2454 SAVESPTR(PL_last_in_gv);
2456 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2457 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2460 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2461 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2462 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2465 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2466 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2467 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2470 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
2473 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2474 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2475 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2478 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
2482 IO * const io = GvIOp(PL_defoutgv);
2485 if ((SvIV(sv)) == 0)
2486 IoFLAGS(io) &= ~IOf_FLUSH;
2488 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2489 PerlIO *ofp = IoOFP(io);
2491 (void)PerlIO_flush(ofp);
2492 IoFLAGS(io) |= IOf_FLUSH;
2498 SvREFCNT_dec(PL_rs);
2499 PL_rs = newSVsv(sv);
2503 SvREFCNT_dec(PL_ors_sv);
2504 if (SvOK(sv) || SvGMAGICAL(sv)) {
2505 PL_ors_sv = newSVsv(sv);
2513 SvREFCNT_dec(PL_ofs_sv);
2514 if (SvOK(sv) || SvGMAGICAL(sv)) {
2515 PL_ofs_sv = newSVsv(sv);
2522 CopARYBASE_set(&PL_compiling, SvIV(sv));
2525 #ifdef COMPLEX_STATUS
2526 if (PL_localizing == 2) {
2527 PL_statusvalue = LvTARGOFF(sv);
2528 PL_statusvalue_vms = LvTARGLEN(sv);
2532 #ifdef VMSISH_STATUS
2534 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
2537 STATUS_UNIX_EXIT_SET(SvIV(sv));
2542 # define PERL_VMS_BANG vaxc$errno
2544 # define PERL_VMS_BANG 0
2546 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2547 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2552 if (PL_delaymagic) {
2553 PL_delaymagic |= DM_RUID;
2554 break; /* don't do magic till later */
2557 (void)setruid((Uid_t)PL_uid);
2560 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2562 #ifdef HAS_SETRESUID
2563 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2565 if (PL_uid == PL_euid) { /* special case $< = $> */
2567 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2568 if (PL_uid != 0 && PerlProc_getuid() == 0)
2569 (void)PerlProc_setuid(0);
2571 (void)PerlProc_setuid(PL_uid);
2573 PL_uid = PerlProc_getuid();
2574 Perl_croak(aTHX_ "setruid() not implemented");
2579 PL_uid = PerlProc_getuid();
2580 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2584 if (PL_delaymagic) {
2585 PL_delaymagic |= DM_EUID;
2586 break; /* don't do magic till later */
2589 (void)seteuid((Uid_t)PL_euid);
2592 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2594 #ifdef HAS_SETRESUID
2595 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2597 if (PL_euid == PL_uid) /* special case $> = $< */
2598 PerlProc_setuid(PL_euid);
2600 PL_euid = PerlProc_geteuid();
2601 Perl_croak(aTHX_ "seteuid() not implemented");
2606 PL_euid = PerlProc_geteuid();
2607 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2611 if (PL_delaymagic) {
2612 PL_delaymagic |= DM_RGID;
2613 break; /* don't do magic till later */
2616 (void)setrgid((Gid_t)PL_gid);
2619 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2621 #ifdef HAS_SETRESGID
2622 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2624 if (PL_gid == PL_egid) /* special case $( = $) */
2625 (void)PerlProc_setgid(PL_gid);
2627 PL_gid = PerlProc_getgid();
2628 Perl_croak(aTHX_ "setrgid() not implemented");
2633 PL_gid = PerlProc_getgid();
2634 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2637 #ifdef HAS_SETGROUPS
2639 const char *p = SvPV_const(sv, len);
2640 Groups_t *gary = NULL;
2645 for (i = 0; i < NGROUPS; ++i) {
2646 while (*p && !isSPACE(*p))
2653 Newx(gary, i + 1, Groups_t);
2655 Renew(gary, i + 1, Groups_t);
2659 (void)setgroups(i, gary);
2662 #else /* HAS_SETGROUPS */
2664 #endif /* HAS_SETGROUPS */
2665 if (PL_delaymagic) {
2666 PL_delaymagic |= DM_EGID;
2667 break; /* don't do magic till later */
2670 (void)setegid((Gid_t)PL_egid);
2673 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2675 #ifdef HAS_SETRESGID
2676 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2678 if (PL_egid == PL_gid) /* special case $) = $( */
2679 (void)PerlProc_setgid(PL_egid);
2681 PL_egid = PerlProc_getegid();
2682 Perl_croak(aTHX_ "setegid() not implemented");
2687 PL_egid = PerlProc_getegid();
2688 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2691 PL_chopset = SvPV_force(sv,len);
2693 #ifndef MACOS_TRADITIONAL
2695 LOCK_DOLLARZERO_MUTEX;
2696 #ifdef HAS_SETPROCTITLE
2697 /* The BSDs don't show the argv[] in ps(1) output, they
2698 * show a string from the process struct and provide
2699 * the setproctitle() routine to manipulate that. */
2700 if (PL_origalen != 1) {
2701 s = SvPV_const(sv, len);
2702 # if __FreeBSD_version > 410001
2703 /* The leading "-" removes the "perl: " prefix,
2704 * but not the "(perl) suffix from the ps(1)
2705 * output, because that's what ps(1) shows if the
2706 * argv[] is modified. */
2707 setproctitle("-%s", s);
2708 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2709 /* This doesn't really work if you assume that
2710 * $0 = 'foobar'; will wipe out 'perl' from the $0
2711 * because in ps(1) output the result will be like
2712 * sprintf("perl: %s (perl)", s)
2713 * I guess this is a security feature:
2714 * one (a user process) cannot get rid of the original name.
2716 setproctitle("%s", s);
2719 #elif defined(__hpux) && defined(PSTAT_SETCMD)
2720 if (PL_origalen != 1) {
2722 s = SvPV_const(sv, len);
2723 un.pst_command = (char *)s;
2724 pstat(PSTAT_SETCMD, un, len, 0, 0);
2727 if (PL_origalen > 1) {
2728 /* PL_origalen is set in perl_parse(). */
2729 s = SvPV_force(sv,len);
2730 if (len >= (STRLEN)PL_origalen-1) {
2731 /* Longer than original, will be truncated. We assume that
2732 * PL_origalen bytes are available. */
2733 Copy(s, PL_origargv[0], PL_origalen-1, char);
2736 /* Shorter than original, will be padded. */
2738 /* Special case for Mac OS X: see [perl #38868] */
2741 /* Is the space counterintuitive? Yes.
2742 * (You were expecting \0?)
2743 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2745 const int pad = ' ';
2747 Copy(s, PL_origargv[0], len, char);
2748 PL_origargv[0][len] = 0;
2749 memset(PL_origargv[0] + len + 1,
2750 pad, PL_origalen - len - 1);
2752 PL_origargv[0][PL_origalen-1] = 0;
2753 for (i = 1; i < PL_origargc; i++)
2757 UNLOCK_DOLLARZERO_MUTEX;
2765 Perl_whichsig(pTHX_ const char *sig)
2767 register char* const* sigv;
2768 PERL_UNUSED_CONTEXT;
2770 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
2771 if (strEQ(sig,*sigv))
2772 return PL_sig_num[sigv - (char* const*)PL_sig_name];
2774 if (strEQ(sig,"CHLD"))
2778 if (strEQ(sig,"CLD"))
2785 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2786 Perl_sighandler(int sig, siginfo_t *sip, void *uap PERL_UNUSED_DECL)
2788 Perl_sighandler(int sig)
2791 #ifdef PERL_GET_SIG_CONTEXT
2792 dTHXa(PERL_GET_SIG_CONTEXT);
2799 SV * const tSv = PL_Sv;
2803 XPV * const tXpv = PL_Xpv;
2805 if (PL_savestack_ix + 15 <= PL_savestack_max)
2807 if (PL_markstack_ptr < PL_markstack_max - 2)
2809 if (PL_scopestack_ix < PL_scopestack_max - 3)
2812 if (!PL_psig_ptr[sig]) {
2813 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2818 /* Max number of items pushed there is 3*n or 4. We cannot fix
2819 infinity, so we fix 4 (in fact 5): */
2821 PL_savestack_ix += 5; /* Protect save in progress. */
2822 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
2825 PL_markstack_ptr++; /* Protect mark. */
2827 PL_scopestack_ix += 1;
2828 /* sv_2cv is too complicated, try a simpler variant first: */
2829 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2830 || SvTYPE(cv) != SVt_PVCV) {
2832 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
2835 if (!cv || !CvROOT(cv)) {
2836 if (ckWARN(WARN_SIGNAL))
2837 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2838 PL_sig_name[sig], (gv ? GvENAME(gv)
2845 if(PL_psig_name[sig]) {
2846 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
2848 #if !defined(PERL_IMPLICIT_CONTEXT)
2852 sv = sv_newmortal();
2853 sv_setpv(sv,PL_sig_name[sig]);
2856 PUSHSTACKi(PERLSI_SIGNAL);
2859 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2861 struct sigaction oact;
2863 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2866 SV *rv = newRV_noinc((SV*)sih);
2867 /* The siginfo fields signo, code, errno, pid, uid,
2868 * addr, status, and band are defined by POSIX/SUSv3. */
2869 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
2870 (void)hv_stores(sih, "code", newSViv(sip->si_code));
2871 #if 0 /* XXX TODO: Configure scan for the existence of these, but even that does not help if the SA_SIGINFO is not implemented according to the spec. */
2872 hv_stores(sih, "errno", newSViv(sip->si_errno));
2873 hv_stores(sih, "status", newSViv(sip->si_status));
2874 hv_stores(sih, "uid", newSViv(sip->si_uid));
2875 hv_stores(sih, "pid", newSViv(sip->si_pid));
2876 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
2877 hv_stores(sih, "band", newSViv(sip->si_band));
2881 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
2889 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2892 if (SvTRUE(ERRSV)) {
2894 #ifdef HAS_SIGPROCMASK
2895 /* Handler "died", for example to get out of a restart-able read().
2896 * Before we re-do that on its behalf re-enable the signal which was
2897 * blocked by the system when we entered.
2901 sigaddset(&set,sig);
2902 sigprocmask(SIG_UNBLOCK, &set, NULL);
2904 /* Not clear if this will work */
2905 (void)rsignal(sig, SIG_IGN);
2906 (void)rsignal(sig, PL_csighandlerp);
2908 #endif /* !PERL_MICRO */
2909 Perl_die(aTHX_ NULL);
2913 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2917 PL_scopestack_ix -= 1;
2920 PL_op = myop; /* Apparently not needed... */
2922 PL_Sv = tSv; /* Restore global temporaries. */
2929 S_restore_magic(pTHX_ const void *p)
2932 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2933 SV* const sv = mgs->mgs_sv;
2938 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2940 #ifdef PERL_OLD_COPY_ON_WRITE
2941 /* While magic was saved (and off) sv_setsv may well have seen
2942 this SV as a prime candidate for COW. */
2944 sv_force_normal_flags(sv, 0);
2948 SvFLAGS(sv) |= mgs->mgs_flags;
2951 if (SvGMAGICAL(sv)) {
2952 /* downgrade public flags to private,
2953 and discard any other private flags */
2955 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2957 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2958 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2963 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2965 /* If we're still on top of the stack, pop us off. (That condition
2966 * will be satisfied if restore_magic was called explicitly, but *not*
2967 * if it's being called via leave_scope.)
2968 * The reason for doing this is that otherwise, things like sv_2cv()
2969 * may leave alloc gunk on the savestack, and some code
2970 * (e.g. sighandler) doesn't expect that...
2972 if (PL_savestack_ix == mgs->mgs_ss_ix)
2974 I32 popval = SSPOPINT;
2975 assert(popval == SAVEt_DESTRUCTOR_X);
2976 PL_savestack_ix -= 2;
2978 assert(popval == SAVEt_ALLOC);
2980 PL_savestack_ix -= popval;
2986 S_unwind_handler_stack(pTHX_ const void *p)
2989 const U32 flags = *(const U32*)p;
2992 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2993 #if !defined(PERL_IMPLICIT_CONTEXT)
2995 SvREFCNT_dec(PL_sig_sv);
3000 =for apidoc magic_sethint
3002 Triggered by a store to %^H, records the key/value pair to
3003 C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3004 anything that would need a deep copy. Maybe we should warn if we find a
3010 Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3013 assert(mg->mg_len == HEf_SVKEY);
3015 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3016 an alternative leaf in there, with PL_compiling.cop_hints being used if
3017 it's NULL. If needed for threads, the alternative could lock a mutex,
3018 or take other more complex action. */
3020 /* Something changed in %^H, so it will need to be restored on scope exit.
3021 Doing this here saves a lot of doing it manually in perl code (and
3022 forgetting to do it, and consequent subtle errors. */
3023 PL_hints |= HINT_LOCALIZE_HH;
3024 PL_compiling.cop_hints_hash
3025 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
3026 (SV *)mg->mg_ptr, sv);
3031 =for apidoc magic_sethint
3033 Triggered by a delete from %^H, records the key to
3034 C<PL_compiling.cop_hints_hash>.
3039 Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3042 PERL_UNUSED_ARG(sv);
3044 assert(mg->mg_len == HEf_SVKEY);
3046 PERL_UNUSED_ARG(sv);
3048 PL_hints |= HINT_LOCALIZE_HH;
3049 PL_compiling.cop_hints_hash
3050 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
3051 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3057 * c-indentation-style: bsd
3059 * indent-tabs-mode: t
3062 * ex: set ts=8 sts=4 sw=4 noet: