3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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, ...);
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 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
107 =for apidoc mg_magical
109 Turns on the magical status of an SV. See C<sv_magic>.
115 Perl_mg_magical(pTHX_ SV *sv)
119 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
120 const MGVTBL* const vtbl = mg->mg_virtual;
122 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
126 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
135 Do magic after a value is retrieved from the SV. See C<sv_magic>.
141 Perl_mg_get(pTHX_ SV *sv)
144 const I32 mgs_ix = SSNEW(sizeof(MGS));
145 const bool was_temp = (bool)SvTEMP(sv);
147 MAGIC *newmg, *head, *cur, *mg;
148 /* guard against sv having being freed midway by holding a private
151 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
152 cause the SV's buffer to get stolen (and maybe other stuff).
155 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
160 save_magic(mgs_ix, sv);
162 /* We must call svt_get(sv, mg) for each valid entry in the linked
163 list of magic. svt_get() may delete the current entry, add new
164 magic to the head of the list, or upgrade the SV. AMS 20010810 */
166 newmg = cur = head = mg = SvMAGIC(sv);
168 const MGVTBL * const vtbl = mg->mg_virtual;
170 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
171 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
173 /* guard against magic having been deleted - eg FETCH calling
178 /* Don't restore the flags for this entry if it was deleted. */
179 if (mg->mg_flags & MGf_GSKIP)
180 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
183 mg = mg->mg_moremagic;
186 /* Have we finished with the new entries we saw? Start again
187 where we left off (unless there are more new entries). */
195 /* Were any new entries added? */
196 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
203 restore_magic(INT2PTR(void *, (IV)mgs_ix));
205 if (SvREFCNT(sv) == 1) {
206 /* We hold the last reference to this SV, which implies that the
207 SV was deleted as a side effect of the routines we called. */
216 Do magic after a value is assigned to the SV. See C<sv_magic>.
222 Perl_mg_set(pTHX_ SV *sv)
225 const I32 mgs_ix = SSNEW(sizeof(MGS));
229 save_magic(mgs_ix, sv);
231 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
232 const MGVTBL* vtbl = mg->mg_virtual;
233 nextmg = mg->mg_moremagic; /* it may delete itself */
234 if (mg->mg_flags & MGf_GSKIP) {
235 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
236 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
238 if (vtbl && vtbl->svt_set)
239 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
242 restore_magic(INT2PTR(void*, (IV)mgs_ix));
247 =for apidoc mg_length
249 Report on the SV's length. See C<sv_magic>.
255 Perl_mg_length(pTHX_ SV *sv)
261 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
262 const MGVTBL * const vtbl = mg->mg_virtual;
263 if (vtbl && vtbl->svt_len) {
264 const I32 mgs_ix = SSNEW(sizeof(MGS));
265 save_magic(mgs_ix, sv);
266 /* omit MGf_GSKIP -- not changed here */
267 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
268 restore_magic(INT2PTR(void*, (IV)mgs_ix));
274 const U8 *s = (U8*)SvPV_const(sv, len);
275 len = Perl_utf8_length(aTHX_ s, s + len);
278 (void)SvPV_const(sv, len);
283 Perl_mg_size(pTHX_ SV *sv)
287 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
288 const MGVTBL* const vtbl = mg->mg_virtual;
289 if (vtbl && vtbl->svt_len) {
290 const I32 mgs_ix = SSNEW(sizeof(MGS));
292 save_magic(mgs_ix, sv);
293 /* omit MGf_GSKIP -- not changed here */
294 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
295 restore_magic(INT2PTR(void*, (IV)mgs_ix));
302 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
306 Perl_croak(aTHX_ "Size magic not implemented");
315 Clear something magical that the SV represents. See C<sv_magic>.
321 Perl_mg_clear(pTHX_ SV *sv)
323 const I32 mgs_ix = SSNEW(sizeof(MGS));
326 save_magic(mgs_ix, sv);
328 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
329 const MGVTBL* const vtbl = mg->mg_virtual;
330 /* omit GSKIP -- never set here */
332 if (vtbl && vtbl->svt_clear)
333 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
336 restore_magic(INT2PTR(void*, (IV)mgs_ix));
343 Finds the magic pointer for type matching the SV. See C<sv_magic>.
349 Perl_mg_find(pTHX_ const SV *sv, int type)
354 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
355 if (mg->mg_type == type)
365 Copies the magic from one SV to another. See C<sv_magic>.
371 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
375 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
376 const MGVTBL* const vtbl = mg->mg_virtual;
377 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
378 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
381 const char type = mg->mg_type;
384 (type == PERL_MAGIC_tied)
386 : (type == PERL_MAGIC_regdata && mg->mg_obj)
389 toLOWER(type), key, klen);
398 =for apidoc mg_localize
400 Copy some of the magic from an existing SV to new localized version of
401 that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
402 doesn't (eg taint, pos).
408 Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
412 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
413 MGVTBL* const vtbl = mg->mg_virtual;
414 switch (mg->mg_type) {
415 /* value magic types: don't copy */
418 case PERL_MAGIC_regex_global:
419 case PERL_MAGIC_nkeys:
420 #ifdef USE_LOCALE_COLLATE
421 case PERL_MAGIC_collxfrm:
424 case PERL_MAGIC_taint:
426 case PERL_MAGIC_vstring:
427 case PERL_MAGIC_utf8:
428 case PERL_MAGIC_substr:
429 case PERL_MAGIC_defelem:
430 case PERL_MAGIC_arylen:
432 case PERL_MAGIC_backref:
433 case PERL_MAGIC_arylen_p:
434 case PERL_MAGIC_rhash:
435 case PERL_MAGIC_symtab:
439 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
440 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
442 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
443 mg->mg_ptr, mg->mg_len);
445 /* container types should remain read-only across localization */
446 SvFLAGS(nsv) |= SvREADONLY(sv);
449 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
450 SvFLAGS(nsv) |= SvMAGICAL(sv);
460 Free any magic storage used by the SV. See C<sv_magic>.
466 Perl_mg_free(pTHX_ SV *sv)
470 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
471 const MGVTBL* const vtbl = mg->mg_virtual;
472 moremagic = mg->mg_moremagic;
473 if (vtbl && vtbl->svt_free)
474 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
475 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
476 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
477 Safefree(mg->mg_ptr);
478 else if (mg->mg_len == HEf_SVKEY)
479 SvREFCNT_dec((SV*)mg->mg_ptr);
481 if (mg->mg_flags & MGf_REFCOUNTED)
482 SvREFCNT_dec(mg->mg_obj);
485 SvMAGIC_set(sv, NULL);
492 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
498 register const REGEXP * const rx = PM_GETRE(PL_curpm);
501 ? rx->nparens /* @+ */
502 : rx->lastparen; /* @- */
510 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
514 register const REGEXP * const rx = PM_GETRE(PL_curpm);
516 register const I32 paren = mg->mg_len;
521 if (paren <= (I32)rx->nparens &&
522 (s = rx->startp[paren]) != -1 &&
523 (t = rx->endp[paren]) != -1)
526 if (mg->mg_obj) /* @+ */
531 if (i > 0 && RX_MATCH_UTF8(rx)) {
532 const char * const b = rx->subbeg;
534 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
545 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
549 Perl_croak(aTHX_ PL_no_modify);
550 NORETURN_FUNCTION_END;
554 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
559 register const REGEXP *rx;
562 switch (*mg->mg_ptr) {
563 case '1': case '2': case '3': case '4':
564 case '5': case '6': case '7': case '8': case '9': case '&':
565 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
567 paren = atoi(mg->mg_ptr); /* $& is in [0] */
569 if (paren <= (I32)rx->nparens &&
570 (s1 = rx->startp[paren]) != -1 &&
571 (t1 = rx->endp[paren]) != -1)
575 if (i > 0 && RX_MATCH_UTF8(rx)) {
576 const char * const s = rx->subbeg + s1;
581 if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
585 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
589 if (ckWARN(WARN_UNINITIALIZED))
594 if (ckWARN(WARN_UNINITIALIZED))
599 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
600 paren = rx->lastparen;
605 case '\016': /* ^N */
606 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
607 paren = rx->lastcloseparen;
613 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
614 if (rx->startp[0] != -1) {
625 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
626 if (rx->endp[0] != -1) {
627 i = rx->sublen - rx->endp[0];
638 if (!SvPOK(sv) && SvNIOK(sv)) {
646 #define SvRTRIM(sv) STMT_START { \
648 STRLEN len = SvCUR(sv); \
649 char * const p = SvPVX(sv); \
650 while (len > 0 && isSPACE(p[len-1])) \
652 SvCUR_set(sv, len); \
658 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
662 register char *s = NULL;
665 const char * const remaining = mg->mg_ptr + 1;
666 const char nextchar = *remaining;
668 switch (*mg->mg_ptr) {
669 case '\001': /* ^A */
670 sv_setsv(sv, PL_bodytarget);
672 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
673 if (nextchar == '\0') {
674 sv_setiv(sv, (IV)PL_minus_c);
676 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
677 sv_setiv(sv, (IV)STATUS_NATIVE);
681 case '\004': /* ^D */
682 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
684 case '\005': /* ^E */
685 if (nextchar == '\0') {
686 #if defined(MACOS_TRADITIONAL)
690 sv_setnv(sv,(double)gMacPerl_OSErr);
691 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
695 # include <descrip.h>
696 # include <starlet.h>
698 $DESCRIPTOR(msgdsc,msg);
699 sv_setnv(sv,(NV) vaxc$errno);
700 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
701 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
706 if (!(_emx_env & 0x200)) { /* Under DOS */
707 sv_setnv(sv, (NV)errno);
708 sv_setpv(sv, errno ? Strerror(errno) : "");
710 if (errno != errno_isOS2) {
711 const int tmp = _syserrno();
712 if (tmp) /* 2nd call to _syserrno() makes it 0 */
715 sv_setnv(sv, (NV)Perl_rc);
716 sv_setpv(sv, os2error(Perl_rc));
720 const DWORD dwErr = GetLastError();
721 sv_setnv(sv, (NV)dwErr);
723 PerlProc_GetOSError(sv, dwErr);
726 sv_setpvn(sv, "", 0);
731 const int saveerrno = errno;
732 sv_setnv(sv, (NV)errno);
733 sv_setpv(sv, errno ? Strerror(errno) : "");
738 SvNOK_on(sv); /* what a wonderful hack! */
740 else if (strEQ(remaining, "NCODING"))
741 sv_setsv(sv, PL_encoding);
743 case '\006': /* ^F */
744 sv_setiv(sv, (IV)PL_maxsysfd);
746 case '\010': /* ^H */
747 sv_setiv(sv, (IV)PL_hints);
749 case '\011': /* ^I */ /* NOT \t in EBCDIC */
751 sv_setpv(sv, PL_inplace);
753 sv_setsv(sv, &PL_sv_undef);
755 case '\017': /* ^O & ^OPEN */
756 if (nextchar == '\0') {
757 sv_setpv(sv, PL_osname);
760 else if (strEQ(remaining, "PEN")) {
761 if (!PL_compiling.cop_io)
762 sv_setsv(sv, &PL_sv_undef);
764 sv_setsv(sv, PL_compiling.cop_io);
768 case '\020': /* ^P */
769 sv_setiv(sv, (IV)PL_perldb);
771 case '\023': /* ^S */
772 if (nextchar == '\0') {
773 if (PL_lex_state != LEX_NOTPARSING)
776 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
781 case '\024': /* ^T */
782 if (nextchar == '\0') {
784 sv_setnv(sv, PL_basetime);
786 sv_setiv(sv, (IV)PL_basetime);
789 else if (strEQ(remaining, "AINT"))
790 sv_setiv(sv, PL_tainting
791 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
794 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
795 if (strEQ(remaining, "NICODE"))
796 sv_setuv(sv, (UV) PL_unicode);
797 else if (strEQ(remaining, "TF8LOCALE"))
798 sv_setuv(sv, (UV) PL_utf8locale);
799 else if (strEQ(remaining, "TF8CACHE"))
800 sv_setiv(sv, (IV) PL_utf8cache);
802 case '\027': /* ^W & $^WARNING_BITS */
803 if (nextchar == '\0')
804 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
805 else if (strEQ(remaining, "ARNING_BITS")) {
806 if (PL_compiling.cop_warnings == pWARN_NONE) {
807 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
809 else if (PL_compiling.cop_warnings == pWARN_STD) {
812 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
816 else if (PL_compiling.cop_warnings == pWARN_ALL) {
817 /* Get the bit mask for $warnings::Bits{all}, because
818 * it could have been extended by warnings::register */
820 HV * const bits=get_hv("warnings::Bits", FALSE);
821 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
822 sv_setsv(sv, *bits_all);
825 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
829 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
830 *PL_compiling.cop_warnings);
835 case '1': case '2': case '3': case '4':
836 case '5': case '6': case '7': case '8': case '9': case '&':
837 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
841 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
842 * XXX Does the new way break anything?
844 paren = atoi(mg->mg_ptr); /* $& is in [0] */
846 if (paren <= (I32)rx->nparens &&
847 (s1 = rx->startp[paren]) != -1 &&
848 (t1 = rx->endp[paren]) != -1)
856 const int oldtainted = PL_tainted;
859 PL_tainted = oldtainted;
860 if (RX_MATCH_UTF8(rx) && is_utf8_string((U8*)s, i))
865 if (RX_MATCH_TAINTED(rx)) {
866 MAGIC* const mg = SvMAGIC(sv);
869 SvMAGIC_set(sv, mg->mg_moremagic);
871 if ((mgt = SvMAGIC(sv))) {
872 mg->mg_moremagic = mgt;
882 sv_setsv(sv,&PL_sv_undef);
885 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
886 paren = rx->lastparen;
890 sv_setsv(sv,&PL_sv_undef);
892 case '\016': /* ^N */
893 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
894 paren = rx->lastcloseparen;
898 sv_setsv(sv,&PL_sv_undef);
901 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
902 if ((s = rx->subbeg) && rx->startp[0] != -1) {
907 sv_setsv(sv,&PL_sv_undef);
910 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
911 if (rx->subbeg && rx->endp[0] != -1) {
912 s = rx->subbeg + rx->endp[0];
913 i = rx->sublen - rx->endp[0];
917 sv_setsv(sv,&PL_sv_undef);
920 if (GvIO(PL_last_in_gv)) {
921 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
926 sv_setiv(sv, (IV)STATUS_CURRENT);
927 #ifdef COMPLEX_STATUS
928 LvTARGOFF(sv) = PL_statusvalue;
929 LvTARGLEN(sv) = PL_statusvalue_vms;
934 if (GvIOp(PL_defoutgv))
935 s = IoTOP_NAME(GvIOp(PL_defoutgv));
939 sv_setpv(sv,GvENAME(PL_defoutgv));
944 if (GvIOp(PL_defoutgv))
945 s = IoFMT_NAME(GvIOp(PL_defoutgv));
947 s = GvENAME(PL_defoutgv);
951 if (GvIOp(PL_defoutgv))
952 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
955 if (GvIOp(PL_defoutgv))
956 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
959 if (GvIOp(PL_defoutgv))
960 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
967 WITH_THR(sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop)));
970 if (GvIOp(PL_defoutgv))
971 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
977 sv_copypv(sv, PL_ors_sv);
981 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
982 sv_setpv(sv, errno ? Strerror(errno) : "");
985 const int saveerrno = errno;
986 sv_setnv(sv, (NV)errno);
988 if (errno == errno_isOS2 || errno == errno_isOS2_set)
989 sv_setpv(sv, os2error(Perl_rc));
992 sv_setpv(sv, errno ? Strerror(errno) : "");
997 SvNOK_on(sv); /* what a wonderful hack! */
1000 sv_setiv(sv, (IV)PL_uid);
1003 sv_setiv(sv, (IV)PL_euid);
1006 sv_setiv(sv, (IV)PL_gid);
1009 sv_setiv(sv, (IV)PL_egid);
1011 #ifdef HAS_GETGROUPS
1013 Groups_t *gary = NULL;
1014 I32 i, num_groups = getgroups(0, gary);
1015 Newx(gary, num_groups, Groups_t);
1016 num_groups = getgroups(num_groups, gary);
1017 for (i = 0; i < num_groups; i++)
1018 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
1021 (void)SvIOK_on(sv); /* what a wonderful hack! */
1024 #ifndef MACOS_TRADITIONAL
1033 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
1035 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
1037 if (uf && uf->uf_val)
1038 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
1043 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
1046 STRLEN len = 0, klen;
1047 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
1048 const char * const ptr = MgPV_const(mg,klen);
1051 #ifdef DYNAMIC_ENV_FETCH
1052 /* We just undefd an environment var. Is a replacement */
1053 /* waiting in the wings? */
1055 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1057 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
1061 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
1062 /* And you'll never guess what the dog had */
1063 /* in its mouth... */
1065 MgTAINTEDDIR_off(mg);
1067 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
1068 char pathbuf[256], eltbuf[256], *cp, *elt;
1072 strncpy(eltbuf, s, 255);
1075 do { /* DCL$PATH may be a search list */
1076 while (1) { /* as may dev portion of any element */
1077 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1078 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1079 cando_by_name(S_IWUSR,0,elt) ) {
1080 MgTAINTEDDIR_on(mg);
1084 if ((cp = strchr(elt, ':')) != NULL)
1086 if (my_trnlnm(elt, eltbuf, j++))
1092 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1095 if (s && klen == 4 && strEQ(ptr,"PATH")) {
1096 const char * const strend = s + len;
1098 while (s < strend) {
1102 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
1103 s, strend, ':', &i);
1105 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
1107 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
1108 MgTAINTEDDIR_on(mg);
1114 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1120 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
1122 PERL_UNUSED_ARG(sv);
1123 my_setenv(MgPV_nolen_const(mg),NULL);
1128 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1131 PERL_UNUSED_ARG(mg);
1133 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1135 if (PL_localizing) {
1138 hv_iterinit((HV*)sv);
1139 while ((entry = hv_iternext((HV*)sv))) {
1141 my_setenv(hv_iterkey(entry, &keylen),
1142 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
1150 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1153 PERL_UNUSED_ARG(sv);
1154 PERL_UNUSED_ARG(mg);
1156 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1164 #ifdef HAS_SIGPROCMASK
1166 restore_sigmask(pTHX_ SV *save_sv)
1168 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
1169 (void)sigprocmask(SIG_SETMASK, ossetp, (sigset_t *)0);
1173 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1176 /* Are we fetching a signal entry? */
1177 const I32 i = whichsig(MgPV_nolen_const(mg));
1180 sv_setsv(sv,PL_psig_ptr[i]);
1182 Sighandler_t sigstate = rsignal_state(i);
1183 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1184 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1187 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1188 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1191 /* cache state so we don't fetch it again */
1192 if(sigstate == (Sighandler_t) SIG_IGN)
1193 sv_setpv(sv,"IGNORE");
1195 sv_setsv(sv,&PL_sv_undef);
1196 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1203 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1205 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1206 * refactoring might be in order.
1209 register const char * const s = MgPV_nolen_const(mg);
1210 PERL_UNUSED_ARG(sv);
1213 if (strEQ(s,"__DIE__"))
1215 else if (strEQ(s,"__WARN__"))
1218 Perl_croak(aTHX_ "No such hook: %s", s);
1220 SV * const to_dec = *svp;
1222 SvREFCNT_dec(to_dec);
1226 /* Are we clearing a signal entry? */
1227 const I32 i = whichsig(s);
1229 #ifdef HAS_SIGPROCMASK
1232 /* Avoid having the signal arrive at a bad time, if possible. */
1235 sigprocmask(SIG_BLOCK, &set, &save);
1237 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1238 SAVEFREESV(save_sv);
1239 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1242 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1243 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1245 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1246 PL_sig_defaulting[i] = 1;
1247 (void)rsignal(i, PL_csighandlerp);
1249 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1251 if(PL_psig_name[i]) {
1252 SvREFCNT_dec(PL_psig_name[i]);
1255 if(PL_psig_ptr[i]) {
1256 SV * const to_dec=PL_psig_ptr[i];
1259 SvREFCNT_dec(to_dec);
1269 S_raise_signal(pTHX_ int sig)
1272 /* Set a flag to say this signal is pending */
1273 PL_psig_pend[sig]++;
1274 /* And one to say _a_ signal is pending */
1279 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1280 Perl_csighandler(int sig, ...)
1282 Perl_csighandler(int sig)
1285 #ifdef PERL_GET_SIG_CONTEXT
1286 dTHXa(PERL_GET_SIG_CONTEXT);
1290 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1291 (void) rsignal(sig, PL_csighandlerp);
1292 if (PL_sig_ignoring[sig]) return;
1294 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1295 if (PL_sig_defaulting[sig])
1296 #ifdef KILL_BY_SIGPRC
1297 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1302 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
1303 /* Call the perl level handler now--
1304 * with risk we may be in malloc() etc. */
1305 (*PL_sighandlerp)(sig);
1307 S_raise_signal(aTHX_ sig);
1310 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1312 Perl_csighandler_init(void)
1315 if (PL_sig_handlers_initted) return;
1317 for (sig = 1; sig < SIG_SIZE; sig++) {
1318 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1320 PL_sig_defaulting[sig] = 1;
1321 (void) rsignal(sig, PL_csighandlerp);
1323 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1324 PL_sig_ignoring[sig] = 0;
1327 PL_sig_handlers_initted = 1;
1332 Perl_despatch_signals(pTHX)
1337 for (sig = 1; sig < SIG_SIZE; sig++) {
1338 if (PL_psig_pend[sig]) {
1339 PERL_BLOCKSIG_ADD(set, sig);
1340 PL_psig_pend[sig] = 0;
1341 PERL_BLOCKSIG_BLOCK(set);
1342 (*PL_sighandlerp)(sig);
1343 PERL_BLOCKSIG_UNBLOCK(set);
1349 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1354 /* Need to be careful with SvREFCNT_dec(), because that can have side
1355 * effects (due to closures). We must make sure that the new disposition
1356 * is in place before it is called.
1360 #ifdef HAS_SIGPROCMASK
1365 register const char *s = MgPV_const(mg,len);
1367 if (strEQ(s,"__DIE__"))
1369 else if (strEQ(s,"__WARN__"))
1372 Perl_croak(aTHX_ "No such hook: %s", s);
1380 i = whichsig(s); /* ...no, a brick */
1382 if (ckWARN(WARN_SIGNAL))
1383 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1386 #ifdef HAS_SIGPROCMASK
1387 /* Avoid having the signal arrive at a bad time, if possible. */
1390 sigprocmask(SIG_BLOCK, &set, &save);
1392 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1393 SAVEFREESV(save_sv);
1394 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1397 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1398 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1400 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1401 PL_sig_ignoring[i] = 0;
1403 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1404 PL_sig_defaulting[i] = 0;
1406 SvREFCNT_dec(PL_psig_name[i]);
1407 to_dec = PL_psig_ptr[i];
1408 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1409 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1410 PL_psig_name[i] = newSVpvn(s, len);
1411 SvREADONLY_on(PL_psig_name[i]);
1413 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1415 (void)rsignal(i, PL_csighandlerp);
1416 #ifdef HAS_SIGPROCMASK
1421 *svp = SvREFCNT_inc_simple_NN(sv);
1423 SvREFCNT_dec(to_dec);
1426 s = SvPV_force(sv,len);
1427 if (strEQ(s,"IGNORE")) {
1429 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1430 PL_sig_ignoring[i] = 1;
1431 (void)rsignal(i, PL_csighandlerp);
1433 (void)rsignal(i, (Sighandler_t) SIG_IGN);
1437 else if (strEQ(s,"DEFAULT") || !*s) {
1439 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1441 PL_sig_defaulting[i] = 1;
1442 (void)rsignal(i, PL_csighandlerp);
1445 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1450 * We should warn if HINT_STRICT_REFS, but without
1451 * access to a known hint bit in a known OP, we can't
1452 * tell whether HINT_STRICT_REFS is in force or not.
1454 if (!strchr(s,':') && !strchr(s,'\''))
1455 Perl_sv_insert(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"));
1457 (void)rsignal(i, PL_csighandlerp);
1459 *svp = SvREFCNT_inc_simple_NN(sv);
1461 #ifdef HAS_SIGPROCMASK
1466 SvREFCNT_dec(to_dec);
1469 #endif /* !PERL_MICRO */
1472 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1475 PERL_UNUSED_ARG(sv);
1476 PERL_UNUSED_ARG(mg);
1477 PL_sub_generation++;
1482 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1485 PERL_UNUSED_ARG(sv);
1486 PERL_UNUSED_ARG(mg);
1487 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1488 PL_amagic_generation++;
1494 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1496 HV * const hv = (HV*)LvTARG(sv);
1498 PERL_UNUSED_ARG(mg);
1501 (void) hv_iterinit(hv);
1502 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1505 while (hv_iternext(hv))
1510 sv_setiv(sv, (IV)i);
1515 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1517 PERL_UNUSED_ARG(mg);
1519 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1524 /* caller is responsible for stack switching/cleanup */
1526 S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
1533 PUSHs(SvTIED_obj(sv, mg));
1536 if (mg->mg_len >= 0)
1537 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1538 else if (mg->mg_len == HEf_SVKEY)
1539 PUSHs((SV*)mg->mg_ptr);
1541 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1542 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1550 return call_method(meth, flags);
1554 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
1560 PUSHSTACKi(PERLSI_MAGIC);
1562 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1563 sv_setsv(sv, *PL_stack_sp--);
1573 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1576 mg->mg_flags |= MGf_GSKIP;
1577 magic_methpack(sv,mg,"FETCH");
1582 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1586 PUSHSTACKi(PERLSI_MAGIC);
1587 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1594 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1596 return magic_methpack(sv,mg,"DELETE");
1601 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1608 PUSHSTACKi(PERLSI_MAGIC);
1609 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1610 sv = *PL_stack_sp--;
1611 retval = (U32) SvIV(sv)-1;
1620 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1625 PUSHSTACKi(PERLSI_MAGIC);
1627 XPUSHs(SvTIED_obj(sv, mg));
1629 call_method("CLEAR", G_SCALAR|G_DISCARD);
1637 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1640 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1644 PUSHSTACKi(PERLSI_MAGIC);
1647 PUSHs(SvTIED_obj(sv, mg));
1652 if (call_method(meth, G_SCALAR))
1653 sv_setsv(key, *PL_stack_sp--);
1662 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1664 return magic_methpack(sv,mg,"EXISTS");
1668 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1672 SV * const tied = SvTIED_obj((SV*)hv, mg);
1673 HV * const pkg = SvSTASH((SV*)SvRV(tied));
1675 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1677 if (HvEITER_get(hv))
1678 /* we are in an iteration so the hash cannot be empty */
1680 /* no xhv_eiter so now use FIRSTKEY */
1681 key = sv_newmortal();
1682 magic_nextpack((SV*)hv, mg, key);
1683 HvEITER_set(hv, NULL); /* need to reset iterator */
1684 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1687 /* there is a SCALAR method that we can call */
1689 PUSHSTACKi(PERLSI_MAGIC);
1695 if (call_method("SCALAR", G_SCALAR))
1696 retval = *PL_stack_sp--;
1698 retval = &PL_sv_undef;
1705 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1708 GV * const gv = PL_DBline;
1709 const I32 i = SvTRUE(sv);
1710 SV ** const svp = av_fetch(GvAV(gv),
1711 atoi(MgPV_nolen_const(mg)), FALSE);
1712 if (svp && SvIOKp(*svp)) {
1713 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1715 /* set or clear breakpoint in the relevant control op */
1717 o->op_flags |= OPf_SPECIAL;
1719 o->op_flags &= ~OPf_SPECIAL;
1726 Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
1729 const AV * const obj = (AV*)mg->mg_obj;
1731 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
1739 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1742 AV * const obj = (AV*)mg->mg_obj;
1744 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
1746 if (ckWARN(WARN_MISC))
1747 Perl_warner(aTHX_ packWARN(WARN_MISC),
1748 "Attempt to set length of freed array");
1754 Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1757 PERL_UNUSED_ARG(sv);
1758 /* during global destruction, mg_obj may already have been freed */
1759 if (PL_in_clean_all)
1762 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1765 /* arylen scalar holds a pointer back to the array, but doesn't own a
1766 reference. Hence the we (the array) are about to go away with it
1767 still pointing at us. Clear its pointer, else it would be pointing
1768 at free memory. See the comment in sv_magic about reference loops,
1769 and why it can't own a reference to us. */
1776 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1779 SV* const lsv = LvTARG(sv);
1780 PERL_UNUSED_ARG(mg);
1782 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1783 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1784 if (found && found->mg_len >= 0) {
1785 I32 i = found->mg_len;
1787 sv_pos_b2u(lsv, &i);
1788 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
1797 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1800 SV* const lsv = LvTARG(sv);
1806 PERL_UNUSED_ARG(mg);
1808 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1809 found = mg_find(lsv, PERL_MAGIC_regex_global);
1815 #ifdef PERL_OLD_COPY_ON_WRITE
1817 sv_force_normal_flags(lsv, 0);
1819 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
1822 else if (!SvOK(sv)) {
1826 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1828 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
1831 ulen = sv_len_utf8(lsv);
1841 else if (pos > (SSize_t)len)
1846 sv_pos_u2b(lsv, &p, 0);
1850 found->mg_len = pos;
1851 found->mg_flags &= ~MGf_MINMATCH;
1857 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1860 PERL_UNUSED_ARG(mg);
1864 if (SvFLAGS(sv) & SVp_SCREAM
1865 && (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVGV)) {
1866 /* We're actually already a typeglob, so don't need the stuff below.
1870 gv = gv_fetchsv(sv, GV_ADD, SVt_PVGV);
1875 GvGP(sv) = gp_ref(GvGP(gv));
1880 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1883 SV * const lsv = LvTARG(sv);
1884 const char * const tmps = SvPV_const(lsv,len);
1885 I32 offs = LvTARGOFF(sv);
1886 I32 rem = LvTARGLEN(sv);
1887 PERL_UNUSED_ARG(mg);
1890 sv_pos_u2b(lsv, &offs, &rem);
1891 if (offs > (I32)len)
1893 if (rem + offs > (I32)len)
1895 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1902 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1906 const char * const tmps = SvPV_const(sv, len);
1907 SV * const lsv = LvTARG(sv);
1908 I32 lvoff = LvTARGOFF(sv);
1909 I32 lvlen = LvTARGLEN(sv);
1910 PERL_UNUSED_ARG(mg);
1913 sv_utf8_upgrade(lsv);
1914 sv_pos_u2b(lsv, &lvoff, &lvlen);
1915 sv_insert(lsv, lvoff, lvlen, tmps, len);
1916 LvTARGLEN(sv) = sv_len_utf8(sv);
1919 else if (lsv && SvUTF8(lsv)) {
1921 sv_pos_u2b(lsv, &lvoff, &lvlen);
1922 LvTARGLEN(sv) = len;
1923 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
1924 sv_insert(lsv, lvoff, lvlen, utf8, len);
1928 sv_insert(lsv, lvoff, lvlen, tmps, len);
1929 LvTARGLEN(sv) = len;
1937 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1940 PERL_UNUSED_ARG(sv);
1941 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
1946 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1949 PERL_UNUSED_ARG(sv);
1950 /* update taint status unless we're restoring at scope exit */
1951 if (PL_localizing != 2) {
1961 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1963 SV * const lsv = LvTARG(sv);
1964 PERL_UNUSED_ARG(mg);
1967 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1975 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1977 PERL_UNUSED_ARG(mg);
1978 do_vecset(sv); /* XXX slurp this routine */
1983 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1987 if (LvTARGLEN(sv)) {
1989 SV * const ahv = LvTARG(sv);
1990 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1995 AV* const av = (AV*)LvTARG(sv);
1996 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1997 targ = AvARRAY(av)[LvTARGOFF(sv)];
1999 if (targ && (targ != &PL_sv_undef)) {
2000 /* somebody else defined it for us */
2001 SvREFCNT_dec(LvTARG(sv));
2002 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
2004 SvREFCNT_dec(mg->mg_obj);
2006 mg->mg_flags &= ~MGf_REFCOUNTED;
2011 sv_setsv(sv, targ ? targ : &PL_sv_undef);
2016 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
2018 PERL_UNUSED_ARG(mg);
2022 sv_setsv(LvTARG(sv), sv);
2023 SvSETMAGIC(LvTARG(sv));
2029 Perl_vivify_defelem(pTHX_ SV *sv)
2035 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
2038 SV * const ahv = LvTARG(sv);
2039 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
2042 if (!value || value == &PL_sv_undef)
2043 Perl_croak(aTHX_ PL_no_helem_sv, mg->mg_obj);
2046 AV* const av = (AV*)LvTARG(sv);
2047 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
2048 LvTARG(sv) = NULL; /* array can't be extended */
2050 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
2051 if (!svp || (value = *svp) == &PL_sv_undef)
2052 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
2055 SvREFCNT_inc_simple_void(value);
2056 SvREFCNT_dec(LvTARG(sv));
2059 SvREFCNT_dec(mg->mg_obj);
2061 mg->mg_flags &= ~MGf_REFCOUNTED;
2065 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
2067 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
2071 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
2073 PERL_UNUSED_CONTEXT;
2080 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
2082 PERL_UNUSED_ARG(mg);
2083 sv_unmagic(sv, PERL_MAGIC_bm);
2089 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
2091 PERL_UNUSED_ARG(mg);
2092 sv_unmagic(sv, PERL_MAGIC_fm);
2098 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2100 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2102 if (uf && uf->uf_set)
2103 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2108 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2110 PERL_UNUSED_ARG(mg);
2111 sv_unmagic(sv, PERL_MAGIC_qr);
2116 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
2119 regexp * const re = (regexp *)mg->mg_obj;
2120 PERL_UNUSED_ARG(sv);
2126 #ifdef USE_LOCALE_COLLATE
2128 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2131 * RenE<eacute> Descartes said "I think not."
2132 * and vanished with a faint plop.
2134 PERL_UNUSED_CONTEXT;
2135 PERL_UNUSED_ARG(sv);
2137 Safefree(mg->mg_ptr);
2143 #endif /* USE_LOCALE_COLLATE */
2145 /* Just clear the UTF-8 cache data. */
2147 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2149 PERL_UNUSED_CONTEXT;
2150 PERL_UNUSED_ARG(sv);
2151 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2153 mg->mg_len = -1; /* The mg_len holds the len cache. */
2158 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2161 register const char *s;
2164 switch (*mg->mg_ptr) {
2165 case '\001': /* ^A */
2166 sv_setsv(PL_bodytarget, sv);
2168 case '\003': /* ^C */
2169 PL_minus_c = (bool)SvIV(sv);
2172 case '\004': /* ^D */
2174 s = SvPV_nolen_const(sv);
2175 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2176 DEBUG_x(dump_all());
2178 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
2181 case '\005': /* ^E */
2182 if (*(mg->mg_ptr+1) == '\0') {
2183 #ifdef MACOS_TRADITIONAL
2184 gMacPerl_OSErr = SvIV(sv);
2187 set_vaxc_errno(SvIV(sv));
2190 SetLastError( SvIV(sv) );
2193 os2_setsyserrno(SvIV(sv));
2195 /* will anyone ever use this? */
2196 SETERRNO(SvIV(sv), 4);
2202 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2204 SvREFCNT_dec(PL_encoding);
2205 if (SvOK(sv) || SvGMAGICAL(sv)) {
2206 PL_encoding = newSVsv(sv);
2213 case '\006': /* ^F */
2214 PL_maxsysfd = SvIV(sv);
2216 case '\010': /* ^H */
2217 PL_hints = SvIV(sv);
2219 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2220 Safefree(PL_inplace);
2221 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
2223 case '\017': /* ^O */
2224 if (*(mg->mg_ptr+1) == '\0') {
2225 Safefree(PL_osname);
2228 TAINT_PROPER("assigning to $^O");
2229 PL_osname = savesvpv(sv);
2232 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2233 if (!PL_compiling.cop_io)
2234 PL_compiling.cop_io = newSVsv(sv);
2236 sv_setsv(PL_compiling.cop_io,sv);
2239 case '\020': /* ^P */
2240 PL_perldb = SvIV(sv);
2241 if (PL_perldb && !PL_DBsingle)
2244 case '\024': /* ^T */
2246 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2248 PL_basetime = (Time_t)SvIV(sv);
2251 case '\025': /* ^UTF8CACHE */
2252 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2253 PL_utf8cache = (signed char) sv_2iv(sv);
2256 case '\027': /* ^W & $^WARNING_BITS */
2257 if (*(mg->mg_ptr+1) == '\0') {
2258 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2260 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2261 | (i ? G_WARN_ON : G_WARN_OFF) ;
2264 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2265 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2266 if (!SvPOK(sv) && PL_localizing) {
2267 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2268 PL_compiling.cop_warnings = pWARN_NONE;
2273 int accumulate = 0 ;
2274 int any_fatals = 0 ;
2275 const char * const ptr = SvPV_const(sv, len) ;
2276 for (i = 0 ; i < len ; ++i) {
2277 accumulate |= ptr[i] ;
2278 any_fatals |= (ptr[i] & 0xAA) ;
2281 PL_compiling.cop_warnings = pWARN_NONE;
2282 /* Yuck. I can't see how to abstract this: */
2283 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2284 WARN_ALL) && !any_fatals) {
2285 PL_compiling.cop_warnings = pWARN_ALL;
2286 PL_dowarn |= G_WARN_ONCE ;
2290 const char *const p = SvPV_const(sv, len);
2292 PL_compiling.cop_warnings
2293 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
2296 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2297 PL_dowarn |= G_WARN_ONCE ;
2305 if (PL_localizing) {
2306 if (PL_localizing == 1)
2307 SAVESPTR(PL_last_in_gv);
2309 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2310 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2313 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2314 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2315 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2318 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2319 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2320 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2323 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
2326 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2327 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2328 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2331 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
2335 IO * const io = GvIOp(PL_defoutgv);
2338 if ((SvIV(sv)) == 0)
2339 IoFLAGS(io) &= ~IOf_FLUSH;
2341 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2342 PerlIO *ofp = IoOFP(io);
2344 (void)PerlIO_flush(ofp);
2345 IoFLAGS(io) |= IOf_FLUSH;
2351 SvREFCNT_dec(PL_rs);
2352 PL_rs = newSVsv(sv);
2356 SvREFCNT_dec(PL_ors_sv);
2357 if (SvOK(sv) || SvGMAGICAL(sv)) {
2358 PL_ors_sv = newSVsv(sv);
2366 SvREFCNT_dec(PL_ofs_sv);
2367 if (SvOK(sv) || SvGMAGICAL(sv)) {
2368 PL_ofs_sv = newSVsv(sv);
2375 CopARYBASE_set(&PL_compiling, SvIV(sv));
2378 #ifdef COMPLEX_STATUS
2379 if (PL_localizing == 2) {
2380 PL_statusvalue = LvTARGOFF(sv);
2381 PL_statusvalue_vms = LvTARGLEN(sv);
2385 #ifdef VMSISH_STATUS
2387 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
2390 STATUS_UNIX_EXIT_SET(SvIV(sv));
2395 # define PERL_VMS_BANG vaxc$errno
2397 # define PERL_VMS_BANG 0
2399 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2400 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2405 if (PL_delaymagic) {
2406 PL_delaymagic |= DM_RUID;
2407 break; /* don't do magic till later */
2410 (void)setruid((Uid_t)PL_uid);
2413 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2415 #ifdef HAS_SETRESUID
2416 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2418 if (PL_uid == PL_euid) { /* special case $< = $> */
2420 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2421 if (PL_uid != 0 && PerlProc_getuid() == 0)
2422 (void)PerlProc_setuid(0);
2424 (void)PerlProc_setuid(PL_uid);
2426 PL_uid = PerlProc_getuid();
2427 Perl_croak(aTHX_ "setruid() not implemented");
2432 PL_uid = PerlProc_getuid();
2433 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2437 if (PL_delaymagic) {
2438 PL_delaymagic |= DM_EUID;
2439 break; /* don't do magic till later */
2442 (void)seteuid((Uid_t)PL_euid);
2445 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2447 #ifdef HAS_SETRESUID
2448 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2450 if (PL_euid == PL_uid) /* special case $> = $< */
2451 PerlProc_setuid(PL_euid);
2453 PL_euid = PerlProc_geteuid();
2454 Perl_croak(aTHX_ "seteuid() not implemented");
2459 PL_euid = PerlProc_geteuid();
2460 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2464 if (PL_delaymagic) {
2465 PL_delaymagic |= DM_RGID;
2466 break; /* don't do magic till later */
2469 (void)setrgid((Gid_t)PL_gid);
2472 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2474 #ifdef HAS_SETRESGID
2475 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2477 if (PL_gid == PL_egid) /* special case $( = $) */
2478 (void)PerlProc_setgid(PL_gid);
2480 PL_gid = PerlProc_getgid();
2481 Perl_croak(aTHX_ "setrgid() not implemented");
2486 PL_gid = PerlProc_getgid();
2487 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2490 #ifdef HAS_SETGROUPS
2492 const char *p = SvPV_const(sv, len);
2493 Groups_t *gary = NULL;
2498 for (i = 0; i < NGROUPS; ++i) {
2499 while (*p && !isSPACE(*p))
2506 Newx(gary, i + 1, Groups_t);
2508 Renew(gary, i + 1, Groups_t);
2512 (void)setgroups(i, gary);
2516 #else /* HAS_SETGROUPS */
2518 #endif /* HAS_SETGROUPS */
2519 if (PL_delaymagic) {
2520 PL_delaymagic |= DM_EGID;
2521 break; /* don't do magic till later */
2524 (void)setegid((Gid_t)PL_egid);
2527 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2529 #ifdef HAS_SETRESGID
2530 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2532 if (PL_egid == PL_gid) /* special case $) = $( */
2533 (void)PerlProc_setgid(PL_egid);
2535 PL_egid = PerlProc_getegid();
2536 Perl_croak(aTHX_ "setegid() not implemented");
2541 PL_egid = PerlProc_getegid();
2542 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2545 PL_chopset = SvPV_force(sv,len);
2547 #ifndef MACOS_TRADITIONAL
2549 LOCK_DOLLARZERO_MUTEX;
2550 #ifdef HAS_SETPROCTITLE
2551 /* The BSDs don't show the argv[] in ps(1) output, they
2552 * show a string from the process struct and provide
2553 * the setproctitle() routine to manipulate that. */
2554 if (PL_origalen != 1) {
2555 s = SvPV_const(sv, len);
2556 # if __FreeBSD_version > 410001
2557 /* The leading "-" removes the "perl: " prefix,
2558 * but not the "(perl) suffix from the ps(1)
2559 * output, because that's what ps(1) shows if the
2560 * argv[] is modified. */
2561 setproctitle("-%s", s);
2562 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2563 /* This doesn't really work if you assume that
2564 * $0 = 'foobar'; will wipe out 'perl' from the $0
2565 * because in ps(1) output the result will be like
2566 * sprintf("perl: %s (perl)", s)
2567 * I guess this is a security feature:
2568 * one (a user process) cannot get rid of the original name.
2570 setproctitle("%s", s);
2574 #if defined(__hpux) && defined(PSTAT_SETCMD)
2575 if (PL_origalen != 1) {
2577 s = SvPV_const(sv, len);
2578 un.pst_command = (char *)s;
2579 pstat(PSTAT_SETCMD, un, len, 0, 0);
2582 if (PL_origalen > 1) {
2583 /* PL_origalen is set in perl_parse(). */
2584 s = SvPV_force(sv,len);
2585 if (len >= (STRLEN)PL_origalen-1) {
2586 /* Longer than original, will be truncated. We assume that
2587 * PL_origalen bytes are available. */
2588 Copy(s, PL_origargv[0], PL_origalen-1, char);
2591 /* Shorter than original, will be padded. */
2592 Copy(s, PL_origargv[0], len, char);
2593 PL_origargv[0][len] = 0;
2594 memset(PL_origargv[0] + len + 1,
2595 /* Is the space counterintuitive? Yes.
2596 * (You were expecting \0?)
2597 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2600 PL_origalen - len - 1);
2602 PL_origargv[0][PL_origalen-1] = 0;
2603 for (i = 1; i < PL_origargc; i++)
2606 UNLOCK_DOLLARZERO_MUTEX;
2614 Perl_whichsig(pTHX_ const char *sig)
2616 register char* const* sigv;
2617 PERL_UNUSED_CONTEXT;
2619 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
2620 if (strEQ(sig,*sigv))
2621 return PL_sig_num[sigv - (char* const*)PL_sig_name];
2623 if (strEQ(sig,"CHLD"))
2627 if (strEQ(sig,"CLD"))
2634 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2635 Perl_sighandler(int sig, ...)
2637 Perl_sighandler(int sig)
2640 #ifdef PERL_GET_SIG_CONTEXT
2641 dTHXa(PERL_GET_SIG_CONTEXT);
2648 SV * const tSv = PL_Sv;
2652 XPV * const tXpv = PL_Xpv;
2654 if (PL_savestack_ix + 15 <= PL_savestack_max)
2656 if (PL_markstack_ptr < PL_markstack_max - 2)
2658 if (PL_scopestack_ix < PL_scopestack_max - 3)
2661 if (!PL_psig_ptr[sig]) {
2662 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2667 /* Max number of items pushed there is 3*n or 4. We cannot fix
2668 infinity, so we fix 4 (in fact 5): */
2670 PL_savestack_ix += 5; /* Protect save in progress. */
2671 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
2674 PL_markstack_ptr++; /* Protect mark. */
2676 PL_scopestack_ix += 1;
2677 /* sv_2cv is too complicated, try a simpler variant first: */
2678 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2679 || SvTYPE(cv) != SVt_PVCV) {
2681 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
2684 if (!cv || !CvROOT(cv)) {
2685 if (ckWARN(WARN_SIGNAL))
2686 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2687 PL_sig_name[sig], (gv ? GvENAME(gv)
2694 if(PL_psig_name[sig]) {
2695 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
2697 #if !defined(PERL_IMPLICIT_CONTEXT)
2701 sv = sv_newmortal();
2702 sv_setpv(sv,PL_sig_name[sig]);
2705 PUSHSTACKi(PERLSI_SIGNAL);
2708 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2710 struct sigaction oact;
2712 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2716 va_start(args, sig);
2717 sip = (siginfo_t*)va_arg(args, siginfo_t*);
2720 SV *rv = newRV_noinc((SV*)sih);
2721 /* The siginfo fields signo, code, errno, pid, uid,
2722 * addr, status, and band are defined by POSIX/SUSv3. */
2723 hv_store(sih, "signo", 5, newSViv(sip->si_signo), 0);
2724 hv_store(sih, "code", 4, newSViv(sip->si_code), 0);
2725 #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. */
2726 hv_store(sih, "errno", 5, newSViv(sip->si_errno), 0);
2727 hv_store(sih, "status", 6, newSViv(sip->si_status), 0);
2728 hv_store(sih, "uid", 3, newSViv(sip->si_uid), 0);
2729 hv_store(sih, "pid", 3, newSViv(sip->si_pid), 0);
2730 hv_store(sih, "addr", 4, newSVuv(PTR2UV(sip->si_addr)), 0);
2731 hv_store(sih, "band", 4, newSViv(sip->si_band), 0);
2735 PUSHs(newSVpv((void*)sip, sizeof(*sip)));
2744 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2747 if (SvTRUE(ERRSV)) {
2749 #ifdef HAS_SIGPROCMASK
2750 /* Handler "died", for example to get out of a restart-able read().
2751 * Before we re-do that on its behalf re-enable the signal which was
2752 * blocked by the system when we entered.
2756 sigaddset(&set,sig);
2757 sigprocmask(SIG_UNBLOCK, &set, NULL);
2759 /* Not clear if this will work */
2760 (void)rsignal(sig, SIG_IGN);
2761 (void)rsignal(sig, PL_csighandlerp);
2763 #endif /* !PERL_MICRO */
2764 Perl_die(aTHX_ NULL);
2768 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2772 PL_scopestack_ix -= 1;
2775 PL_op = myop; /* Apparently not needed... */
2777 PL_Sv = tSv; /* Restore global temporaries. */
2784 S_restore_magic(pTHX_ const void *p)
2787 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
2788 SV* const sv = mgs->mgs_sv;
2793 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2795 #ifdef PERL_OLD_COPY_ON_WRITE
2796 /* While magic was saved (and off) sv_setsv may well have seen
2797 this SV as a prime candidate for COW. */
2799 sv_force_normal_flags(sv, 0);
2803 SvFLAGS(sv) |= mgs->mgs_flags;
2806 if (SvGMAGICAL(sv)) {
2807 /* downgrade public flags to private,
2808 and discard any other private flags */
2810 U32 public = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
2812 SvFLAGS(sv) &= ~( public | SVp_IOK|SVp_NOK|SVp_POK );
2813 SvFLAGS(sv) |= ( public << PRIVSHIFT );
2818 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2820 /* If we're still on top of the stack, pop us off. (That condition
2821 * will be satisfied if restore_magic was called explicitly, but *not*
2822 * if it's being called via leave_scope.)
2823 * The reason for doing this is that otherwise, things like sv_2cv()
2824 * may leave alloc gunk on the savestack, and some code
2825 * (e.g. sighandler) doesn't expect that...
2827 if (PL_savestack_ix == mgs->mgs_ss_ix)
2829 I32 popval = SSPOPINT;
2830 assert(popval == SAVEt_DESTRUCTOR_X);
2831 PL_savestack_ix -= 2;
2833 assert(popval == SAVEt_ALLOC);
2835 PL_savestack_ix -= popval;
2841 S_unwind_handler_stack(pTHX_ const void *p)
2844 const U32 flags = *(const U32*)p;
2847 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2848 #if !defined(PERL_IMPLICIT_CONTEXT)
2850 SvREFCNT_dec(PL_sig_sv);
2855 =for apidoc magic_sethint
2857 Triggered by a store to %^H, records the key/value pair to
2858 C<PL_compiling.cop_hints>. It is assumed that hints aren't storing anything
2859 that would need a deep copy. Maybe we should warn if we find a reference.
2864 Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
2867 assert(mg->mg_len == HEf_SVKEY);
2869 /* mg->mg_obj isn't being used. If needed, it would be possible to store
2870 an alternative leaf in there, with PL_compiling.cop_hints being used if
2871 it's NULL. If needed for threads, the alternative could lock a mutex,
2872 or take other more complex action. */
2874 /* Something changed in %^H, so it will need to be restored on scope exit.
2875 Doing this here saves a lot of doing it manually in perl code (and
2876 forgetting to do it, and consequent subtle errors. */
2877 PL_hints |= HINT_LOCALIZE_HH;
2878 PL_compiling.cop_hints
2879 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints,
2880 (SV *)mg->mg_ptr, newSVsv(sv));
2885 =for apidoc magic_sethint
2887 Triggered by a delete from %^H, records the key to C<PL_compiling.cop_hints>.
2892 Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
2895 assert(mg->mg_len == HEf_SVKEY);
2897 PERL_UNUSED_ARG(sv);
2899 PL_hints |= HINT_LOCALIZE_HH;
2900 PL_compiling.cop_hints
2901 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints,
2902 (SV *)mg->mg_ptr, &PL_sv_placeholder);
2908 * c-indentation-style: bsd
2910 * indent-tabs-mode: t
2913 * ex: set ts=8 sts=4 sw=4 noet: