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. */
1349 (*PL_sighandlerp)(sig, NULL, NULL);
1351 S_raise_signal(aTHX_ sig);
1352 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1356 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1358 Perl_csighandler_init(void)
1361 if (PL_sig_handlers_initted) return;
1363 for (sig = 1; sig < SIG_SIZE; sig++) {
1364 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1366 PL_sig_defaulting[sig] = 1;
1367 (void) rsignal(sig, PL_csighandlerp);
1369 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1370 PL_sig_ignoring[sig] = 0;
1373 PL_sig_handlers_initted = 1;
1378 Perl_despatch_signals(pTHX)
1383 for (sig = 1; sig < SIG_SIZE; sig++) {
1384 if (PL_psig_pend[sig]) {
1385 PERL_BLOCKSIG_ADD(set, sig);
1386 PL_psig_pend[sig] = 0;
1387 PERL_BLOCKSIG_BLOCK(set);
1388 (*PL_sighandlerp)(sig, NULL, NULL);
1389 PERL_BLOCKSIG_UNBLOCK(set);
1395 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1400 /* Need to be careful with SvREFCNT_dec(), because that can have side
1401 * effects (due to closures). We must make sure that the new disposition
1402 * is in place before it is called.
1406 #ifdef HAS_SIGPROCMASK
1411 register const char *s = MgPV_const(mg,len);
1413 if (strEQ(s,"__DIE__"))
1415 else if (strEQ(s,"__WARN__"))
1418 Perl_croak(aTHX_ "No such hook: %s", s);
1421 if (*svp != PERL_WARNHOOK_FATAL)
1427 i = whichsig(s); /* ...no, a brick */
1429 if (ckWARN(WARN_SIGNAL))
1430 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1433 #ifdef HAS_SIGPROCMASK
1434 /* Avoid having the signal arrive at a bad time, if possible. */
1437 sigprocmask(SIG_BLOCK, &set, &save);
1439 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1440 SAVEFREESV(save_sv);
1441 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1444 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1445 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1447 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1448 PL_sig_ignoring[i] = 0;
1450 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1451 PL_sig_defaulting[i] = 0;
1453 SvREFCNT_dec(PL_psig_name[i]);
1454 to_dec = PL_psig_ptr[i];
1455 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1456 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1457 PL_psig_name[i] = newSVpvn(s, len);
1458 SvREADONLY_on(PL_psig_name[i]);
1460 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1462 (void)rsignal(i, PL_csighandlerp);
1463 #ifdef HAS_SIGPROCMASK
1468 *svp = SvREFCNT_inc_simple_NN(sv);
1470 SvREFCNT_dec(to_dec);
1473 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
1474 if (strEQ(s,"IGNORE")) {
1476 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1477 PL_sig_ignoring[i] = 1;
1478 (void)rsignal(i, PL_csighandlerp);
1480 (void)rsignal(i, (Sighandler_t) SIG_IGN);
1484 else if (strEQ(s,"DEFAULT") || !*s) {
1486 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1488 PL_sig_defaulting[i] = 1;
1489 (void)rsignal(i, PL_csighandlerp);
1492 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1497 * We should warn if HINT_STRICT_REFS, but without
1498 * access to a known hint bit in a known OP, we can't
1499 * tell whether HINT_STRICT_REFS is in force or not.
1501 if (!strchr(s,':') && !strchr(s,'\''))
1502 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
1504 (void)rsignal(i, PL_csighandlerp);
1506 *svp = SvREFCNT_inc_simple_NN(sv);
1508 #ifdef HAS_SIGPROCMASK
1513 SvREFCNT_dec(to_dec);
1516 #endif /* !PERL_MICRO */
1519 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1523 PERL_UNUSED_ARG(sv);
1525 /* Bail out if destruction is going on */
1526 if(PL_dirty) return 0;
1528 /* Skip _isaelem because _isa will handle it shortly */
1529 if (PL_delaymagic & DM_ARRAY && mg->mg_type == PERL_MAGIC_isaelem)
1532 /* XXX Once it's possible, we need to
1533 detect that our @ISA is aliased in
1534 other stashes, and act on the stashes
1535 of all of the aliases */
1537 /* The first case occurs via setisa,
1538 the second via setisa_elem, which
1539 calls this same magic */
1541 SvTYPE(mg->mg_obj) == SVt_PVGV
1543 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
1546 mro_isa_changed_in(stash);
1552 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1555 PERL_UNUSED_ARG(sv);
1556 PERL_UNUSED_ARG(mg);
1557 PL_amagic_generation++;
1563 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1565 HV * const hv = (HV*)LvTARG(sv);
1567 PERL_UNUSED_ARG(mg);
1570 (void) hv_iterinit(hv);
1571 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1574 while (hv_iternext(hv))
1579 sv_setiv(sv, (IV)i);
1584 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1586 PERL_UNUSED_ARG(mg);
1588 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1593 /* caller is responsible for stack switching/cleanup */
1595 S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
1602 PUSHs(SvTIED_obj(sv, mg));
1605 if (mg->mg_len >= 0)
1606 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1607 else if (mg->mg_len == HEf_SVKEY)
1608 PUSHs((SV*)mg->mg_ptr);
1610 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1611 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1619 return call_method(meth, flags);
1623 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
1629 PUSHSTACKi(PERLSI_MAGIC);
1631 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1632 sv_setsv(sv, *PL_stack_sp--);
1642 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1645 mg->mg_flags |= MGf_GSKIP;
1646 magic_methpack(sv,mg,"FETCH");
1651 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1655 PUSHSTACKi(PERLSI_MAGIC);
1656 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1663 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1665 return magic_methpack(sv,mg,"DELETE");
1670 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1677 PUSHSTACKi(PERLSI_MAGIC);
1678 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1679 sv = *PL_stack_sp--;
1680 retval = SvIV(sv)-1;
1682 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
1687 return (U32) retval;
1691 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1696 PUSHSTACKi(PERLSI_MAGIC);
1698 XPUSHs(SvTIED_obj(sv, mg));
1700 call_method("CLEAR", G_SCALAR|G_DISCARD);
1708 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1711 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1715 PUSHSTACKi(PERLSI_MAGIC);
1718 PUSHs(SvTIED_obj(sv, mg));
1723 if (call_method(meth, G_SCALAR))
1724 sv_setsv(key, *PL_stack_sp--);
1733 Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
1735 return magic_methpack(sv,mg,"EXISTS");
1739 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1743 SV * const tied = SvTIED_obj((SV*)hv, mg);
1744 HV * const pkg = SvSTASH((SV*)SvRV(tied));
1746 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1748 if (HvEITER_get(hv))
1749 /* we are in an iteration so the hash cannot be empty */
1751 /* no xhv_eiter so now use FIRSTKEY */
1752 key = sv_newmortal();
1753 magic_nextpack((SV*)hv, mg, key);
1754 HvEITER_set(hv, NULL); /* need to reset iterator */
1755 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1758 /* there is a SCALAR method that we can call */
1760 PUSHSTACKi(PERLSI_MAGIC);
1766 if (call_method("SCALAR", G_SCALAR))
1767 retval = *PL_stack_sp--;
1769 retval = &PL_sv_undef;
1776 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1779 GV * const gv = PL_DBline;
1780 const I32 i = SvTRUE(sv);
1781 SV ** const svp = av_fetch(GvAV(gv),
1782 atoi(MgPV_nolen_const(mg)), FALSE);
1783 if (svp && SvIOKp(*svp)) {
1784 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1786 /* set or clear breakpoint in the relevant control op */
1788 o->op_flags |= OPf_SPECIAL;
1790 o->op_flags &= ~OPf_SPECIAL;
1797 Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
1800 const AV * const obj = (AV*)mg->mg_obj;
1802 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
1810 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1813 AV * const obj = (AV*)mg->mg_obj;
1815 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
1817 if (ckWARN(WARN_MISC))
1818 Perl_warner(aTHX_ packWARN(WARN_MISC),
1819 "Attempt to set length of freed array");
1825 Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1828 PERL_UNUSED_ARG(sv);
1829 /* during global destruction, mg_obj may already have been freed */
1830 if (PL_in_clean_all)
1833 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1836 /* arylen scalar holds a pointer back to the array, but doesn't own a
1837 reference. Hence the we (the array) are about to go away with it
1838 still pointing at us. Clear its pointer, else it would be pointing
1839 at free memory. See the comment in sv_magic about reference loops,
1840 and why it can't own a reference to us. */
1847 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1850 SV* const lsv = LvTARG(sv);
1851 PERL_UNUSED_ARG(mg);
1853 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1854 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1855 if (found && found->mg_len >= 0) {
1856 I32 i = found->mg_len;
1858 sv_pos_b2u(lsv, &i);
1859 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
1868 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1871 SV* const lsv = LvTARG(sv);
1877 PERL_UNUSED_ARG(mg);
1879 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1880 found = mg_find(lsv, PERL_MAGIC_regex_global);
1886 #ifdef PERL_OLD_COPY_ON_WRITE
1888 sv_force_normal_flags(lsv, 0);
1890 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
1893 else if (!SvOK(sv)) {
1897 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1899 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
1902 ulen = sv_len_utf8(lsv);
1912 else if (pos > (SSize_t)len)
1917 sv_pos_u2b(lsv, &p, 0);
1921 found->mg_len = pos;
1922 found->mg_flags &= ~MGf_MINMATCH;
1928 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1931 PERL_UNUSED_ARG(mg);
1933 Perl_croak(aTHX_ "Perl_magic_setglob is dead code?");
1937 if (isGV_with_GP(sv)) {
1938 /* We're actually already a typeglob, so don't need the stuff below.
1942 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
1947 GvGP(sv) = gp_ref(GvGP(gv));
1952 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1955 SV * const lsv = LvTARG(sv);
1956 const char * const tmps = SvPV_const(lsv,len);
1957 I32 offs = LvTARGOFF(sv);
1958 I32 rem = LvTARGLEN(sv);
1959 PERL_UNUSED_ARG(mg);
1962 sv_pos_u2b(lsv, &offs, &rem);
1963 if (offs > (I32)len)
1965 if (rem + offs > (I32)len)
1967 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1974 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1978 const char * const tmps = SvPV_const(sv, len);
1979 SV * const lsv = LvTARG(sv);
1980 I32 lvoff = LvTARGOFF(sv);
1981 I32 lvlen = LvTARGLEN(sv);
1982 PERL_UNUSED_ARG(mg);
1985 sv_utf8_upgrade(lsv);
1986 sv_pos_u2b(lsv, &lvoff, &lvlen);
1987 sv_insert(lsv, lvoff, lvlen, tmps, len);
1988 LvTARGLEN(sv) = sv_len_utf8(sv);
1991 else if (lsv && SvUTF8(lsv)) {
1993 sv_pos_u2b(lsv, &lvoff, &lvlen);
1994 LvTARGLEN(sv) = len;
1995 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1996 sv_insert(lsv, lvoff, lvlen, utf8, len);
2000 sv_insert(lsv, lvoff, lvlen, tmps, len);
2001 LvTARGLEN(sv) = len;
2009 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
2012 PERL_UNUSED_ARG(sv);
2013 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
2018 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
2021 PERL_UNUSED_ARG(sv);
2022 /* update taint status */
2031 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
2033 SV * const lsv = LvTARG(sv);
2034 PERL_UNUSED_ARG(mg);
2037 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2045 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
2047 PERL_UNUSED_ARG(mg);
2048 do_vecset(sv); /* XXX slurp this routine */
2053 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
2057 if (LvTARGLEN(sv)) {
2059 SV * const ahv = LvTARG(sv);
2060 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
2065 AV* const av = (AV*)LvTARG(sv);
2066 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2067 targ = AvARRAY(av)[LvTARGOFF(sv)];
2069 if (targ && (targ != &PL_sv_undef)) {
2070 /* somebody else defined it for us */
2071 SvREFCNT_dec(LvTARG(sv));
2072 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
2074 SvREFCNT_dec(mg->mg_obj);
2076 mg->mg_flags &= ~MGf_REFCOUNTED;
2081 sv_setsv(sv, targ ? targ : &PL_sv_undef);
2086 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
2088 PERL_UNUSED_ARG(mg);
2092 sv_setsv(LvTARG(sv), sv);
2093 SvSETMAGIC(LvTARG(sv));
2099 Perl_vivify_defelem(pTHX_ SV *sv)
2105 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
2108 SV * const ahv = LvTARG(sv);
2109 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
2112 if (!value || value == &PL_sv_undef)
2113 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
2116 AV* const av = (AV*)LvTARG(sv);
2117 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
2118 LvTARG(sv) = NULL; /* array can't be extended */
2120 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
2121 if (!svp || (value = *svp) == &PL_sv_undef)
2122 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
2125 SvREFCNT_inc_simple_void(value);
2126 SvREFCNT_dec(LvTARG(sv));
2129 SvREFCNT_dec(mg->mg_obj);
2131 mg->mg_flags &= ~MGf_REFCOUNTED;
2135 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
2137 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
2141 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
2143 PERL_UNUSED_CONTEXT;
2150 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
2152 PERL_UNUSED_ARG(mg);
2153 sv_unmagic(sv, PERL_MAGIC_bm);
2160 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
2162 PERL_UNUSED_ARG(mg);
2163 sv_unmagic(sv, PERL_MAGIC_fm);
2169 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2171 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2173 if (uf && uf->uf_set)
2174 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2179 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2181 PERL_UNUSED_ARG(mg);
2182 sv_unmagic(sv, PERL_MAGIC_qr);
2187 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
2190 regexp * const re = (regexp *)mg->mg_obj;
2191 PERL_UNUSED_ARG(sv);
2197 #ifdef USE_LOCALE_COLLATE
2199 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2202 * RenE<eacute> Descartes said "I think not."
2203 * and vanished with a faint plop.
2205 PERL_UNUSED_CONTEXT;
2206 PERL_UNUSED_ARG(sv);
2208 Safefree(mg->mg_ptr);
2214 #endif /* USE_LOCALE_COLLATE */
2216 /* Just clear the UTF-8 cache data. */
2218 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2220 PERL_UNUSED_CONTEXT;
2221 PERL_UNUSED_ARG(sv);
2222 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2224 mg->mg_len = -1; /* The mg_len holds the len cache. */
2229 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2232 register const char *s;
2234 register const REGEXP * rx;
2235 const char * const remaining = mg->mg_ptr + 1;
2239 switch (*mg->mg_ptr) {
2240 case '\015': /* $^MATCH */
2241 if (strEQ(remaining, "ATCH"))
2243 case '`': /* ${^PREMATCH} caught below */
2245 paren = RX_BUFF_IDX_PREMATCH;
2247 case '\'': /* ${^POSTMATCH} caught below */
2249 paren = RX_BUFF_IDX_POSTMATCH;
2253 paren = RX_BUFF_IDX_FULLMATCH;
2255 case '1': case '2': case '3': case '4':
2256 case '5': case '6': case '7': case '8': case '9':
2257 paren = atoi(mg->mg_ptr);
2259 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2260 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2263 /* Croak with a READONLY error when a numbered match var is
2264 * set without a previous pattern match. Unless it's C<local $1>
2266 if (!PL_localizing) {
2267 Perl_croak(aTHX_ PL_no_modify);
2270 case '\001': /* ^A */
2271 sv_setsv(PL_bodytarget, sv);
2273 case '\003': /* ^C */
2274 PL_minus_c = (bool)SvIV(sv);
2277 case '\004': /* ^D */
2279 s = SvPV_nolen_const(sv);
2280 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2281 DEBUG_x(dump_all());
2283 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
2286 case '\005': /* ^E */
2287 if (*(mg->mg_ptr+1) == '\0') {
2288 #ifdef MACOS_TRADITIONAL
2289 gMacPerl_OSErr = SvIV(sv);
2292 set_vaxc_errno(SvIV(sv));
2295 SetLastError( SvIV(sv) );
2298 os2_setsyserrno(SvIV(sv));
2300 /* will anyone ever use this? */
2301 SETERRNO(SvIV(sv), 4);
2307 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2309 SvREFCNT_dec(PL_encoding);
2310 if (SvOK(sv) || SvGMAGICAL(sv)) {
2311 PL_encoding = newSVsv(sv);
2318 case '\006': /* ^F */
2319 PL_maxsysfd = SvIV(sv);
2321 case '\010': /* ^H */
2322 PL_hints = SvIV(sv);
2324 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2325 Safefree(PL_inplace);
2326 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
2328 case '\017': /* ^O */
2329 if (*(mg->mg_ptr+1) == '\0') {
2330 Safefree(PL_osname);
2333 TAINT_PROPER("assigning to $^O");
2334 PL_osname = savesvpv(sv);
2337 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2339 const char *const start = SvPV(sv, len);
2340 const char *out = (const char*)memchr(start, '\0', len);
2342 struct refcounted_he *tmp_he;
2345 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2347 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2349 /* Opening for input is more common than opening for output, so
2350 ensure that hints for input are sooner on linked list. */
2351 tmp = sv_2mortal(out ? newSVpvn(out + 1, start + len - out - 1)
2353 SvFLAGS(tmp) |= SvUTF8(sv);
2356 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2357 sv_2mortal(newSVpvs("open>")), tmp);
2359 /* The UTF-8 setting is carried over */
2360 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2362 PL_compiling.cop_hints_hash
2363 = Perl_refcounted_he_new(aTHX_ tmp_he,
2364 sv_2mortal(newSVpvs("open<")), tmp);
2367 case '\020': /* ^P */
2368 if (*remaining == '\0') { /* ^P */
2369 PL_perldb = SvIV(sv);
2370 if (PL_perldb && !PL_DBsingle)
2373 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2375 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2378 case '\024': /* ^T */
2380 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2382 PL_basetime = (Time_t)SvIV(sv);
2385 case '\025': /* ^UTF8CACHE */
2386 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2387 PL_utf8cache = (signed char) sv_2iv(sv);
2390 case '\027': /* ^W & $^WARNING_BITS */
2391 if (*(mg->mg_ptr+1) == '\0') {
2392 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2394 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2395 | (i ? G_WARN_ON : G_WARN_OFF) ;
2398 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2399 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2400 if (!SvPOK(sv) && PL_localizing) {
2401 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2402 PL_compiling.cop_warnings = pWARN_NONE;
2407 int accumulate = 0 ;
2408 int any_fatals = 0 ;
2409 const char * const ptr = SvPV_const(sv, len) ;
2410 for (i = 0 ; i < len ; ++i) {
2411 accumulate |= ptr[i] ;
2412 any_fatals |= (ptr[i] & 0xAA) ;
2415 if (!specialWARN(PL_compiling.cop_warnings))
2416 PerlMemShared_free(PL_compiling.cop_warnings);
2417 PL_compiling.cop_warnings = pWARN_NONE;
2419 /* Yuck. I can't see how to abstract this: */
2420 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2421 WARN_ALL) && !any_fatals) {
2422 if (!specialWARN(PL_compiling.cop_warnings))
2423 PerlMemShared_free(PL_compiling.cop_warnings);
2424 PL_compiling.cop_warnings = pWARN_ALL;
2425 PL_dowarn |= G_WARN_ONCE ;
2429 const char *const p = SvPV_const(sv, len);
2431 PL_compiling.cop_warnings
2432 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
2435 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2436 PL_dowarn |= G_WARN_ONCE ;
2444 if (PL_localizing) {
2445 if (PL_localizing == 1)
2446 SAVESPTR(PL_last_in_gv);
2448 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2449 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2452 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2453 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2454 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2457 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2458 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2459 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2462 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
2465 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2466 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2467 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2470 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
2474 IO * const io = GvIOp(PL_defoutgv);
2477 if ((SvIV(sv)) == 0)
2478 IoFLAGS(io) &= ~IOf_FLUSH;
2480 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2481 PerlIO *ofp = IoOFP(io);
2483 (void)PerlIO_flush(ofp);
2484 IoFLAGS(io) |= IOf_FLUSH;
2490 SvREFCNT_dec(PL_rs);
2491 PL_rs = newSVsv(sv);
2495 SvREFCNT_dec(PL_ors_sv);
2496 if (SvOK(sv) || SvGMAGICAL(sv)) {
2497 PL_ors_sv = newSVsv(sv);
2505 SvREFCNT_dec(PL_ofs_sv);
2506 if (SvOK(sv) || SvGMAGICAL(sv)) {
2507 PL_ofs_sv = newSVsv(sv);
2514 CopARYBASE_set(&PL_compiling, SvIV(sv));
2517 #ifdef COMPLEX_STATUS
2518 if (PL_localizing == 2) {
2519 PL_statusvalue = LvTARGOFF(sv);
2520 PL_statusvalue_vms = LvTARGLEN(sv);
2524 #ifdef VMSISH_STATUS
2526 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
2529 STATUS_UNIX_EXIT_SET(SvIV(sv));
2534 # define PERL_VMS_BANG vaxc$errno
2536 # define PERL_VMS_BANG 0
2538 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2539 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2544 if (PL_delaymagic) {
2545 PL_delaymagic |= DM_RUID;
2546 break; /* don't do magic till later */
2549 (void)setruid((Uid_t)PL_uid);
2552 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2554 #ifdef HAS_SETRESUID
2555 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2557 if (PL_uid == PL_euid) { /* special case $< = $> */
2559 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2560 if (PL_uid != 0 && PerlProc_getuid() == 0)
2561 (void)PerlProc_setuid(0);
2563 (void)PerlProc_setuid(PL_uid);
2565 PL_uid = PerlProc_getuid();
2566 Perl_croak(aTHX_ "setruid() not implemented");
2571 PL_uid = PerlProc_getuid();
2572 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2576 if (PL_delaymagic) {
2577 PL_delaymagic |= DM_EUID;
2578 break; /* don't do magic till later */
2581 (void)seteuid((Uid_t)PL_euid);
2584 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2586 #ifdef HAS_SETRESUID
2587 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2589 if (PL_euid == PL_uid) /* special case $> = $< */
2590 PerlProc_setuid(PL_euid);
2592 PL_euid = PerlProc_geteuid();
2593 Perl_croak(aTHX_ "seteuid() not implemented");
2598 PL_euid = PerlProc_geteuid();
2599 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2603 if (PL_delaymagic) {
2604 PL_delaymagic |= DM_RGID;
2605 break; /* don't do magic till later */
2608 (void)setrgid((Gid_t)PL_gid);
2611 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2613 #ifdef HAS_SETRESGID
2614 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2616 if (PL_gid == PL_egid) /* special case $( = $) */
2617 (void)PerlProc_setgid(PL_gid);
2619 PL_gid = PerlProc_getgid();
2620 Perl_croak(aTHX_ "setrgid() not implemented");
2625 PL_gid = PerlProc_getgid();
2626 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2629 #ifdef HAS_SETGROUPS
2631 const char *p = SvPV_const(sv, len);
2632 Groups_t *gary = NULL;
2637 for (i = 0; i < NGROUPS; ++i) {
2638 while (*p && !isSPACE(*p))
2645 Newx(gary, i + 1, Groups_t);
2647 Renew(gary, i + 1, Groups_t);
2651 (void)setgroups(i, gary);
2654 #else /* HAS_SETGROUPS */
2656 #endif /* HAS_SETGROUPS */
2657 if (PL_delaymagic) {
2658 PL_delaymagic |= DM_EGID;
2659 break; /* don't do magic till later */
2662 (void)setegid((Gid_t)PL_egid);
2665 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2667 #ifdef HAS_SETRESGID
2668 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2670 if (PL_egid == PL_gid) /* special case $) = $( */
2671 (void)PerlProc_setgid(PL_egid);
2673 PL_egid = PerlProc_getegid();
2674 Perl_croak(aTHX_ "setegid() not implemented");
2679 PL_egid = PerlProc_getegid();
2680 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2683 PL_chopset = SvPV_force(sv,len);
2685 #ifndef MACOS_TRADITIONAL
2687 LOCK_DOLLARZERO_MUTEX;
2688 #ifdef HAS_SETPROCTITLE
2689 /* The BSDs don't show the argv[] in ps(1) output, they
2690 * show a string from the process struct and provide
2691 * the setproctitle() routine to manipulate that. */
2692 if (PL_origalen != 1) {
2693 s = SvPV_const(sv, len);
2694 # if __FreeBSD_version > 410001
2695 /* The leading "-" removes the "perl: " prefix,
2696 * but not the "(perl) suffix from the ps(1)
2697 * output, because that's what ps(1) shows if the
2698 * argv[] is modified. */
2699 setproctitle("-%s", s);
2700 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2701 /* This doesn't really work if you assume that
2702 * $0 = 'foobar'; will wipe out 'perl' from the $0
2703 * because in ps(1) output the result will be like
2704 * sprintf("perl: %s (perl)", s)
2705 * I guess this is a security feature:
2706 * one (a user process) cannot get rid of the original name.
2708 setproctitle("%s", s);
2711 #elif defined(__hpux) && defined(PSTAT_SETCMD)
2712 if (PL_origalen != 1) {
2714 s = SvPV_const(sv, len);
2715 un.pst_command = (char *)s;
2716 pstat(PSTAT_SETCMD, un, len, 0, 0);
2719 if (PL_origalen > 1) {
2720 /* PL_origalen is set in perl_parse(). */
2721 s = SvPV_force(sv,len);
2722 if (len >= (STRLEN)PL_origalen-1) {
2723 /* Longer than original, will be truncated. We assume that
2724 * PL_origalen bytes are available. */
2725 Copy(s, PL_origargv[0], PL_origalen-1, char);
2728 /* Shorter than original, will be padded. */
2730 /* Special case for Mac OS X: see [perl #38868] */
2733 /* Is the space counterintuitive? Yes.
2734 * (You were expecting \0?)
2735 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2737 const int pad = ' ';
2739 Copy(s, PL_origargv[0], len, char);
2740 PL_origargv[0][len] = 0;
2741 memset(PL_origargv[0] + len + 1,
2742 pad, PL_origalen - len - 1);
2744 PL_origargv[0][PL_origalen-1] = 0;
2745 for (i = 1; i < PL_origargc; i++)
2749 UNLOCK_DOLLARZERO_MUTEX;
2757 Perl_whichsig(pTHX_ const char *sig)
2759 register char* const* sigv;
2760 PERL_UNUSED_CONTEXT;
2762 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
2763 if (strEQ(sig,*sigv))
2764 return PL_sig_num[sigv - (char* const*)PL_sig_name];
2766 if (strEQ(sig,"CHLD"))
2770 if (strEQ(sig,"CLD"))
2777 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2778 Perl_sighandler(int sig, siginfo_t *sip, void *uap PERL_UNUSED_DECL)
2780 Perl_sighandler(int sig)
2783 #ifdef PERL_GET_SIG_CONTEXT
2784 dTHXa(PERL_GET_SIG_CONTEXT);
2791 SV * const tSv = PL_Sv;
2795 XPV * const tXpv = PL_Xpv;
2797 if (PL_savestack_ix + 15 <= PL_savestack_max)
2799 if (PL_markstack_ptr < PL_markstack_max - 2)
2801 if (PL_scopestack_ix < PL_scopestack_max - 3)
2804 if (!PL_psig_ptr[sig]) {
2805 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2810 /* Max number of items pushed there is 3*n or 4. We cannot fix
2811 infinity, so we fix 4 (in fact 5): */
2813 PL_savestack_ix += 5; /* Protect save in progress. */
2814 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
2817 PL_markstack_ptr++; /* Protect mark. */
2819 PL_scopestack_ix += 1;
2820 /* sv_2cv is too complicated, try a simpler variant first: */
2821 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2822 || SvTYPE(cv) != SVt_PVCV) {
2824 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
2827 if (!cv || !CvROOT(cv)) {
2828 if (ckWARN(WARN_SIGNAL))
2829 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2830 PL_sig_name[sig], (gv ? GvENAME(gv)
2837 if(PL_psig_name[sig]) {
2838 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
2840 #if !defined(PERL_IMPLICIT_CONTEXT)
2844 sv = sv_newmortal();
2845 sv_setpv(sv,PL_sig_name[sig]);
2848 PUSHSTACKi(PERLSI_SIGNAL);
2851 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2853 struct sigaction oact;
2855 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2858 SV *rv = newRV_noinc((SV*)sih);
2859 /* The siginfo fields signo, code, errno, pid, uid,
2860 * addr, status, and band are defined by POSIX/SUSv3. */
2861 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
2862 (void)hv_stores(sih, "code", newSViv(sip->si_code));
2863 #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. */
2864 hv_stores(sih, "errno", newSViv(sip->si_errno));
2865 hv_stores(sih, "status", newSViv(sip->si_status));
2866 hv_stores(sih, "uid", newSViv(sip->si_uid));
2867 hv_stores(sih, "pid", newSViv(sip->si_pid));
2868 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
2869 hv_stores(sih, "band", newSViv(sip->si_band));
2873 PUSHs(newSVpv((char *)sip, sizeof(*sip)));
2881 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2884 if (SvTRUE(ERRSV)) {
2886 #ifdef HAS_SIGPROCMASK
2887 /* Handler "died", for example to get out of a restart-able read().
2888 * Before we re-do that on its behalf re-enable the signal which was
2889 * blocked by the system when we entered.
2893 sigaddset(&set,sig);
2894 sigprocmask(SIG_UNBLOCK, &set, NULL);
2896 /* Not clear if this will work */
2897 (void)rsignal(sig, SIG_IGN);
2898 (void)rsignal(sig, PL_csighandlerp);
2900 #endif /* !PERL_MICRO */
2901 Perl_die(aTHX_ NULL);
2905 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2909 PL_scopestack_ix -= 1;
2912 PL_op = myop; /* Apparently not needed... */
2914 PL_Sv = tSv; /* Restore global temporaries. */
2921 S_restore_magic(pTHX_ const void *p)
2924 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2925 SV* const sv = mgs->mgs_sv;
2930 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2932 #ifdef PERL_OLD_COPY_ON_WRITE
2933 /* While magic was saved (and off) sv_setsv may well have seen
2934 this SV as a prime candidate for COW. */
2936 sv_force_normal_flags(sv, 0);
2940 SvFLAGS(sv) |= mgs->mgs_flags;
2943 if (SvGMAGICAL(sv)) {
2944 /* downgrade public flags to private,
2945 and discard any other private flags */
2947 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2949 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
2950 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2955 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2957 /* If we're still on top of the stack, pop us off. (That condition
2958 * will be satisfied if restore_magic was called explicitly, but *not*
2959 * if it's being called via leave_scope.)
2960 * The reason for doing this is that otherwise, things like sv_2cv()
2961 * may leave alloc gunk on the savestack, and some code
2962 * (e.g. sighandler) doesn't expect that...
2964 if (PL_savestack_ix == mgs->mgs_ss_ix)
2966 I32 popval = SSPOPINT;
2967 assert(popval == SAVEt_DESTRUCTOR_X);
2968 PL_savestack_ix -= 2;
2970 assert(popval == SAVEt_ALLOC);
2972 PL_savestack_ix -= popval;
2978 S_unwind_handler_stack(pTHX_ const void *p)
2981 const U32 flags = *(const U32*)p;
2984 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2985 #if !defined(PERL_IMPLICIT_CONTEXT)
2987 SvREFCNT_dec(PL_sig_sv);
2992 =for apidoc magic_sethint
2994 Triggered by a store to %^H, records the key/value pair to
2995 C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
2996 anything that would need a deep copy. Maybe we should warn if we find a
3002 Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3005 assert(mg->mg_len == HEf_SVKEY);
3007 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3008 an alternative leaf in there, with PL_compiling.cop_hints being used if
3009 it's NULL. If needed for threads, the alternative could lock a mutex,
3010 or take other more complex action. */
3012 /* Something changed in %^H, so it will need to be restored on scope exit.
3013 Doing this here saves a lot of doing it manually in perl code (and
3014 forgetting to do it, and consequent subtle errors. */
3015 PL_hints |= HINT_LOCALIZE_HH;
3016 PL_compiling.cop_hints_hash
3017 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
3018 (SV *)mg->mg_ptr, sv);
3023 =for apidoc magic_sethint
3025 Triggered by a delete from %^H, records the key to
3026 C<PL_compiling.cop_hints_hash>.
3031 Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3034 PERL_UNUSED_ARG(sv);
3036 assert(mg->mg_len == HEf_SVKEY);
3038 PERL_UNUSED_ARG(sv);
3040 PL_hints |= HINT_LOCALIZE_HH;
3041 PL_compiling.cop_hints_hash
3042 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
3043 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3049 * c-indentation-style: bsd
3051 * indent-tabs-mode: t
3054 * ex: set ts=8 sts=4 sw=4 noet: