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)
89 PERL_ARGS_ASSERT_SAVE_MAGIC;
91 assert(SvMAGICAL(sv));
92 /* Turning READONLY off for a copy-on-write scalar (including shared
93 hash keys) is a bad idea. */
95 sv_force_normal_flags(sv, 0);
97 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
99 mgs = SSPTR(mgs_ix, MGS*);
101 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
102 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
106 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
107 /* No public flags are set, so promote any private flags to public. */
108 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
113 =for apidoc mg_magical
115 Turns on the magical status of an SV. See C<sv_magic>.
121 Perl_mg_magical(pTHX_ SV *sv)
124 PERL_ARGS_ASSERT_MG_MAGICAL;
126 if ((mg = SvMAGIC(sv))) {
129 const MGVTBL* const vtbl = mg->mg_virtual;
131 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
138 } while ((mg = mg->mg_moremagic));
139 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
145 /* is this container magic (%ENV, $1 etc), or value magic (pos, taint etc)? */
148 S_is_container_magic(const MAGIC *mg)
151 switch (mg->mg_type) {
154 case PERL_MAGIC_regex_global:
155 case PERL_MAGIC_nkeys:
156 #ifdef USE_LOCALE_COLLATE
157 case PERL_MAGIC_collxfrm:
160 case PERL_MAGIC_taint:
162 case PERL_MAGIC_vstring:
163 case PERL_MAGIC_utf8:
164 case PERL_MAGIC_substr:
165 case PERL_MAGIC_defelem:
166 case PERL_MAGIC_arylen:
168 case PERL_MAGIC_backref:
169 case PERL_MAGIC_arylen_p:
170 case PERL_MAGIC_rhash:
171 case PERL_MAGIC_symtab:
181 Do magic after a value is retrieved from the SV. See C<sv_magic>.
187 Perl_mg_get(pTHX_ SV *sv)
190 const I32 mgs_ix = SSNEW(sizeof(MGS));
191 const bool was_temp = (bool)SvTEMP(sv);
193 MAGIC *newmg, *head, *cur, *mg;
194 /* guard against sv having being freed midway by holding a private
197 PERL_ARGS_ASSERT_MG_GET;
199 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
200 cause the SV's buffer to get stolen (and maybe other stuff).
203 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
208 save_magic(mgs_ix, sv);
210 /* We must call svt_get(sv, mg) for each valid entry in the linked
211 list of magic. svt_get() may delete the current entry, add new
212 magic to the head of the list, or upgrade the SV. AMS 20010810 */
214 newmg = cur = head = mg = SvMAGIC(sv);
216 const MGVTBL * const vtbl = mg->mg_virtual;
218 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
219 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
221 /* guard against magic having been deleted - eg FETCH calling
226 /* Don't restore the flags for this entry if it was deleted. */
227 if (mg->mg_flags & MGf_GSKIP)
228 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
231 mg = mg->mg_moremagic;
234 /* Have we finished with the new entries we saw? Start again
235 where we left off (unless there are more new entries). */
243 /* Were any new entries added? */
244 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
251 restore_magic(INT2PTR(void *, (IV)mgs_ix));
253 if (SvREFCNT(sv) == 1) {
254 /* We hold the last reference to this SV, which implies that the
255 SV was deleted as a side effect of the routines we called. */
264 Do magic after a value is assigned to the SV. See C<sv_magic>.
270 Perl_mg_set(pTHX_ SV *sv)
273 const I32 mgs_ix = SSNEW(sizeof(MGS));
277 PERL_ARGS_ASSERT_MG_SET;
279 save_magic(mgs_ix, sv);
281 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
282 const MGVTBL* vtbl = mg->mg_virtual;
283 nextmg = mg->mg_moremagic; /* it may delete itself */
284 if (mg->mg_flags & MGf_GSKIP) {
285 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
286 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
288 if (PL_localizing == 2 && !S_is_container_magic(mg))
290 if (vtbl && vtbl->svt_set)
291 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
294 restore_magic(INT2PTR(void*, (IV)mgs_ix));
299 =for apidoc mg_length
301 Report on the SV's length. See C<sv_magic>.
307 Perl_mg_length(pTHX_ SV *sv)
313 PERL_ARGS_ASSERT_MG_LENGTH;
315 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
316 const MGVTBL * const vtbl = mg->mg_virtual;
317 if (vtbl && vtbl->svt_len) {
318 const I32 mgs_ix = SSNEW(sizeof(MGS));
319 save_magic(mgs_ix, sv);
320 /* omit MGf_GSKIP -- not changed here */
321 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
322 restore_magic(INT2PTR(void*, (IV)mgs_ix));
328 /* You can't know whether it's UTF-8 until you get the string again...
330 const U8 *s = (U8*)SvPV_const(sv, len);
333 len = utf8_length(s, s + len);
340 Perl_mg_size(pTHX_ SV *sv)
344 PERL_ARGS_ASSERT_MG_SIZE;
346 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
347 const MGVTBL* const vtbl = mg->mg_virtual;
348 if (vtbl && vtbl->svt_len) {
349 const I32 mgs_ix = SSNEW(sizeof(MGS));
351 save_magic(mgs_ix, sv);
352 /* omit MGf_GSKIP -- not changed here */
353 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
354 restore_magic(INT2PTR(void*, (IV)mgs_ix));
361 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
365 Perl_croak(aTHX_ "Size magic not implemented");
374 Clear something magical that the SV represents. See C<sv_magic>.
380 Perl_mg_clear(pTHX_ SV *sv)
382 const I32 mgs_ix = SSNEW(sizeof(MGS));
385 PERL_ARGS_ASSERT_MG_CLEAR;
387 save_magic(mgs_ix, sv);
389 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
390 const MGVTBL* const vtbl = mg->mg_virtual;
391 /* omit GSKIP -- never set here */
393 if (vtbl && vtbl->svt_clear)
394 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
397 restore_magic(INT2PTR(void*, (IV)mgs_ix));
404 Finds the magic pointer for type matching the SV. See C<sv_magic>.
410 Perl_mg_find(pTHX_ const SV *sv, int type)
415 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
416 if (mg->mg_type == type)
426 Copies the magic from one SV to another. See C<sv_magic>.
432 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
437 PERL_ARGS_ASSERT_MG_COPY;
439 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
440 const MGVTBL* const vtbl = mg->mg_virtual;
441 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
442 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
445 const char type = mg->mg_type;
446 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
448 (type == PERL_MAGIC_tied)
450 : (type == PERL_MAGIC_regdata && mg->mg_obj)
453 toLOWER(type), key, klen);
462 =for apidoc mg_localize
464 Copy some of the magic from an existing SV to new localized version of
465 that SV. Container magic (eg %ENV, $1, tie) gets copied, value magic
466 doesn't (eg taint, pos).
472 Perl_mg_localize(pTHX_ SV *sv, SV *nsv)
477 PERL_ARGS_ASSERT_MG_LOCALIZE;
479 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
480 const MGVTBL* const vtbl = mg->mg_virtual;
481 if (!S_is_container_magic(mg))
484 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
485 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
487 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
488 mg->mg_ptr, mg->mg_len);
490 /* container types should remain read-only across localization */
491 SvFLAGS(nsv) |= SvREADONLY(sv);
494 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
495 SvFLAGS(nsv) |= SvMAGICAL(sv);
505 Free any magic storage used by the SV. See C<sv_magic>.
511 Perl_mg_free(pTHX_ SV *sv)
516 PERL_ARGS_ASSERT_MG_FREE;
518 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
519 const MGVTBL* const vtbl = mg->mg_virtual;
520 moremagic = mg->mg_moremagic;
521 if (vtbl && vtbl->svt_free)
522 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
523 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
524 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
525 Safefree(mg->mg_ptr);
526 else if (mg->mg_len == HEf_SVKEY)
527 SvREFCNT_dec((SV*)mg->mg_ptr);
529 if (mg->mg_flags & MGf_REFCOUNTED)
530 SvREFCNT_dec(mg->mg_obj);
532 SvMAGIC_set(sv, moremagic);
534 SvMAGIC_set(sv, NULL);
541 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
546 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
549 register const REGEXP * const rx = PM_GETRE(PL_curpm);
551 if (mg->mg_obj) { /* @+ */
552 /* return the number possible */
553 return RX_NPARENS(rx);
555 I32 paren = RX_LASTPAREN(rx);
557 /* return the last filled */
559 && (RX_OFFS(rx)[paren].start == -1
560 || RX_OFFS(rx)[paren].end == -1) )
571 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
575 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
578 register const REGEXP * const rx = PM_GETRE(PL_curpm);
580 register const I32 paren = mg->mg_len;
585 if (paren <= (I32)RX_NPARENS(rx) &&
586 (s = RX_OFFS(rx)[paren].start) != -1 &&
587 (t = RX_OFFS(rx)[paren].end) != -1)
590 if (mg->mg_obj) /* @+ */
595 if (i > 0 && RX_MATCH_UTF8(rx)) {
596 const char * const b = RX_SUBBEG(rx);
598 i = utf8_length((U8*)b, (U8*)(b+i));
609 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
611 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
614 Perl_croak(aTHX_ PL_no_modify);
615 NORETURN_FUNCTION_END;
619 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
624 register const REGEXP * rx;
625 const char * const remaining = mg->mg_ptr + 1;
627 PERL_ARGS_ASSERT_MAGIC_LEN;
629 switch (*mg->mg_ptr) {
631 if (*remaining == '\0') { /* ^P */
633 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
635 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
639 case '\015': /* $^MATCH */
640 if (strEQ(remaining, "ATCH")) {
647 paren = RX_BUFF_IDX_PREMATCH;
651 paren = RX_BUFF_IDX_POSTMATCH;
655 paren = RX_BUFF_IDX_FULLMATCH;
657 case '1': case '2': case '3': case '4':
658 case '5': case '6': case '7': case '8': case '9':
659 paren = atoi(mg->mg_ptr);
661 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
663 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
666 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
669 if (ckWARN(WARN_UNINITIALIZED))
674 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
675 paren = RX_LASTPAREN(rx);
680 case '\016': /* ^N */
681 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
682 paren = RX_LASTCLOSEPAREN(rx);
689 if (!SvPOK(sv) && SvNIOK(sv)) {
697 #define SvRTRIM(sv) STMT_START { \
699 STRLEN len = SvCUR(sv); \
700 char * const p = SvPVX(sv); \
701 while (len > 0 && isSPACE(p[len-1])) \
703 SvCUR_set(sv, len); \
709 Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
711 PERL_ARGS_ASSERT_EMULATE_COP_IO;
713 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
714 sv_setsv(sv, &PL_sv_undef);
718 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
719 SV *const value = Perl_refcounted_he_fetch(aTHX_
721 0, "open<", 5, 0, 0);
726 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
727 SV *const value = Perl_refcounted_he_fetch(aTHX_
729 0, "open>", 5, 0, 0);
737 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
741 register char *s = NULL;
743 const char * const remaining = mg->mg_ptr + 1;
744 const char nextchar = *remaining;
746 PERL_ARGS_ASSERT_MAGIC_GET;
748 switch (*mg->mg_ptr) {
749 case '\001': /* ^A */
750 sv_setsv(sv, PL_bodytarget);
752 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
753 if (nextchar == '\0') {
754 sv_setiv(sv, (IV)PL_minus_c);
756 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
757 sv_setiv(sv, (IV)STATUS_NATIVE);
761 case '\004': /* ^D */
762 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
764 case '\005': /* ^E */
765 if (nextchar == '\0') {
766 #if defined(MACOS_TRADITIONAL)
770 sv_setnv(sv,(double)gMacPerl_OSErr);
771 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
775 # include <descrip.h>
776 # include <starlet.h>
778 $DESCRIPTOR(msgdsc,msg);
779 sv_setnv(sv,(NV) vaxc$errno);
780 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
781 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
786 if (!(_emx_env & 0x200)) { /* Under DOS */
787 sv_setnv(sv, (NV)errno);
788 sv_setpv(sv, errno ? Strerror(errno) : "");
790 if (errno != errno_isOS2) {
791 const int tmp = _syserrno();
792 if (tmp) /* 2nd call to _syserrno() makes it 0 */
795 sv_setnv(sv, (NV)Perl_rc);
796 sv_setpv(sv, os2error(Perl_rc));
800 const DWORD dwErr = GetLastError();
801 sv_setnv(sv, (NV)dwErr);
803 PerlProc_GetOSError(sv, dwErr);
806 sv_setpvn(sv, "", 0);
811 const int saveerrno = errno;
812 sv_setnv(sv, (NV)errno);
813 sv_setpv(sv, errno ? Strerror(errno) : "");
818 SvNOK_on(sv); /* what a wonderful hack! */
820 else if (strEQ(remaining, "NCODING"))
821 sv_setsv(sv, PL_encoding);
823 case '\006': /* ^F */
824 sv_setiv(sv, (IV)PL_maxsysfd);
826 case '\010': /* ^H */
827 sv_setiv(sv, (IV)PL_hints);
829 case '\011': /* ^I */ /* NOT \t in EBCDIC */
830 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
832 case '\017': /* ^O & ^OPEN */
833 if (nextchar == '\0') {
834 sv_setpv(sv, PL_osname);
837 else if (strEQ(remaining, "PEN")) {
838 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
842 if (nextchar == '\0') { /* ^P */
843 sv_setiv(sv, (IV)PL_perldb);
844 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
845 goto do_prematch_fetch;
846 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
847 goto do_postmatch_fetch;
850 case '\023': /* ^S */
851 if (nextchar == '\0') {
852 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
855 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
860 case '\024': /* ^T */
861 if (nextchar == '\0') {
863 sv_setnv(sv, PL_basetime);
865 sv_setiv(sv, (IV)PL_basetime);
868 else if (strEQ(remaining, "AINT"))
869 sv_setiv(sv, PL_tainting
870 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
873 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
874 if (strEQ(remaining, "NICODE"))
875 sv_setuv(sv, (UV) PL_unicode);
876 else if (strEQ(remaining, "TF8LOCALE"))
877 sv_setuv(sv, (UV) PL_utf8locale);
878 else if (strEQ(remaining, "TF8CACHE"))
879 sv_setiv(sv, (IV) PL_utf8cache);
881 case '\027': /* ^W & $^WARNING_BITS */
882 if (nextchar == '\0')
883 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
884 else if (strEQ(remaining, "ARNING_BITS")) {
885 if (PL_compiling.cop_warnings == pWARN_NONE) {
886 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
888 else if (PL_compiling.cop_warnings == pWARN_STD) {
891 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
895 else if (PL_compiling.cop_warnings == pWARN_ALL) {
896 /* Get the bit mask for $warnings::Bits{all}, because
897 * it could have been extended by warnings::register */
898 HV * const bits=get_hv("warnings::Bits", FALSE);
900 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
902 sv_setsv(sv, *bits_all);
905 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
909 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
910 *PL_compiling.cop_warnings);
915 case '\015': /* $^MATCH */
916 if (strEQ(remaining, "ATCH")) {
917 case '1': case '2': case '3': case '4':
918 case '5': case '6': case '7': case '8': case '9': case '&':
919 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
921 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
922 * XXX Does the new way break anything?
924 paren = atoi(mg->mg_ptr); /* $& is in [0] */
925 CALLREG_NUMBUF_FETCH(rx,paren,sv);
928 sv_setsv(sv,&PL_sv_undef);
932 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
933 if (RX_LASTPAREN(rx)) {
934 CALLREG_NUMBUF_FETCH(rx,RX_LASTPAREN(rx),sv);
938 sv_setsv(sv,&PL_sv_undef);
940 case '\016': /* ^N */
941 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
942 if (RX_LASTCLOSEPAREN(rx)) {
943 CALLREG_NUMBUF_FETCH(rx,RX_LASTCLOSEPAREN(rx),sv);
948 sv_setsv(sv,&PL_sv_undef);
952 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
953 CALLREG_NUMBUF_FETCH(rx,-2,sv);
956 sv_setsv(sv,&PL_sv_undef);
960 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
961 CALLREG_NUMBUF_FETCH(rx,-1,sv);
964 sv_setsv(sv,&PL_sv_undef);
967 if (GvIO(PL_last_in_gv)) {
968 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
973 sv_setiv(sv, (IV)STATUS_CURRENT);
974 #ifdef COMPLEX_STATUS
975 LvTARGOFF(sv) = PL_statusvalue;
976 LvTARGLEN(sv) = PL_statusvalue_vms;
981 if (GvIOp(PL_defoutgv))
982 s = IoTOP_NAME(GvIOp(PL_defoutgv));
986 sv_setpv(sv,GvENAME(PL_defoutgv));
987 sv_catpvs(sv,"_TOP");
991 if (GvIOp(PL_defoutgv))
992 s = IoFMT_NAME(GvIOp(PL_defoutgv));
994 s = GvENAME(PL_defoutgv);
998 if (GvIOp(PL_defoutgv))
999 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
1002 if (GvIOp(PL_defoutgv))
1003 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
1006 if (GvIOp(PL_defoutgv))
1007 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
1014 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
1017 if (GvIOp(PL_defoutgv))
1018 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
1024 sv_copypv(sv, PL_ors_sv);
1028 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
1029 sv_setpv(sv, errno ? Strerror(errno) : "");
1032 const int saveerrno = errno;
1033 sv_setnv(sv, (NV)errno);
1035 if (errno == errno_isOS2 || errno == errno_isOS2_set)
1036 sv_setpv(sv, os2error(Perl_rc));
1039 sv_setpv(sv, errno ? Strerror(errno) : "");
1044 SvNOK_on(sv); /* what a wonderful hack! */
1047 sv_setiv(sv, (IV)PL_uid);
1050 sv_setiv(sv, (IV)PL_euid);
1053 sv_setiv(sv, (IV)PL_gid);
1056 sv_setiv(sv, (IV)PL_egid);
1058 #ifdef HAS_GETGROUPS
1060 Groups_t *gary = NULL;
1061 I32 i, num_groups = getgroups(0, gary);
1062 Newx(gary, num_groups, Groups_t);
1063 num_groups = getgroups(num_groups, gary);
1064 for (i = 0; i < num_groups; i++)
1065 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
1068 (void)SvIOK_on(sv); /* what a wonderful hack! */
1071 #ifndef MACOS_TRADITIONAL
1080 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
1082 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
1084 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1086 if (uf && uf->uf_val)
1087 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
1092 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
1095 STRLEN len = 0, klen;
1096 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
1097 const char * const ptr = MgPV_const(mg,klen);
1100 PERL_ARGS_ASSERT_MAGIC_SETENV;
1102 #ifdef DYNAMIC_ENV_FETCH
1103 /* We just undefd an environment var. Is a replacement */
1104 /* waiting in the wings? */
1106 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1108 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
1112 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
1113 /* And you'll never guess what the dog had */
1114 /* in its mouth... */
1116 MgTAINTEDDIR_off(mg);
1118 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
1119 char pathbuf[256], eltbuf[256], *cp, *elt;
1123 my_strlcpy(eltbuf, s, sizeof(eltbuf));
1125 do { /* DCL$PATH may be a search list */
1126 while (1) { /* as may dev portion of any element */
1127 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1128 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1129 cando_by_name(S_IWUSR,0,elt) ) {
1130 MgTAINTEDDIR_on(mg);
1134 if ((cp = strchr(elt, ':')) != NULL)
1136 if (my_trnlnm(elt, eltbuf, j++))
1142 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1145 if (s && klen == 4 && strEQ(ptr,"PATH")) {
1146 const char * const strend = s + len;
1148 while (s < strend) {
1152 #ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1153 const char path_sep = '|';
1155 const char path_sep = ':';
1157 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
1158 s, strend, path_sep, &i);
1160 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
1162 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1164 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1166 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
1167 MgTAINTEDDIR_on(mg);
1173 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1179 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
1181 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
1182 PERL_UNUSED_ARG(sv);
1183 my_setenv(MgPV_nolen_const(mg),NULL);
1188 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1191 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
1192 PERL_UNUSED_ARG(mg);
1194 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1196 if (PL_localizing) {
1199 hv_iterinit((HV*)sv);
1200 while ((entry = hv_iternext((HV*)sv))) {
1202 my_setenv(hv_iterkey(entry, &keylen),
1203 SvPV_nolen_const(hv_iterval((HV*)sv, entry)));
1211 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1214 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
1215 PERL_UNUSED_ARG(sv);
1216 PERL_UNUSED_ARG(mg);
1218 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1226 #ifdef HAS_SIGPROCMASK
1228 restore_sigmask(pTHX_ SV *save_sv)
1230 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
1231 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
1235 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1238 /* Are we fetching a signal entry? */
1239 const I32 i = whichsig(MgPV_nolen_const(mg));
1241 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1245 sv_setsv(sv,PL_psig_ptr[i]);
1247 Sighandler_t sigstate = rsignal_state(i);
1248 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1249 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1252 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1253 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1256 /* cache state so we don't fetch it again */
1257 if(sigstate == (Sighandler_t) SIG_IGN)
1258 sv_setpvs(sv,"IGNORE");
1260 sv_setsv(sv,&PL_sv_undef);
1261 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1268 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1270 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1271 * refactoring might be in order.
1274 register const char * const s = MgPV_nolen_const(mg);
1275 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
1276 PERL_UNUSED_ARG(sv);
1279 if (strEQ(s,"__DIE__"))
1281 else if (strEQ(s,"__WARN__") && PL_warnhook != PERL_WARNHOOK_FATAL)
1284 SV *const to_dec = *svp;
1286 SvREFCNT_dec(to_dec);
1290 /* Are we clearing a signal entry? */
1291 const I32 i = whichsig(s);
1293 #ifdef HAS_SIGPROCMASK
1296 /* Avoid having the signal arrive at a bad time, if possible. */
1299 sigprocmask(SIG_BLOCK, &set, &save);
1301 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
1302 SAVEFREESV(save_sv);
1303 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1306 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1307 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1309 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1310 PL_sig_defaulting[i] = 1;
1311 (void)rsignal(i, PL_csighandlerp);
1313 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1315 if(PL_psig_name[i]) {
1316 SvREFCNT_dec(PL_psig_name[i]);
1319 if(PL_psig_ptr[i]) {
1320 SV * const to_dec=PL_psig_ptr[i];
1323 SvREFCNT_dec(to_dec);
1333 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1334 Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
1336 Perl_csighandler(int sig)
1339 #ifdef PERL_GET_SIG_CONTEXT
1340 dTHXa(PERL_GET_SIG_CONTEXT);
1344 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1345 (void) rsignal(sig, PL_csighandlerp);
1346 if (PL_sig_ignoring[sig]) return;
1348 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1349 if (PL_sig_defaulting[sig])
1350 #ifdef KILL_BY_SIGPRC
1351 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1366 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
1367 /* Call the perl level handler now--
1368 * with risk we may be in malloc() etc. */
1369 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1370 (*PL_sighandlerp)(sig, NULL, NULL);
1372 (*PL_sighandlerp)(sig);
1375 /* Set a flag to say this signal is pending, that is awaiting delivery after
1376 * the current Perl opcode completes */
1377 PL_psig_pend[sig]++;
1379 #ifndef SIG_PENDING_DIE_COUNT
1380 # define SIG_PENDING_DIE_COUNT 120
1382 /* And one to say _a_ signal is pending */
1383 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1384 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1385 (unsigned long)SIG_PENDING_DIE_COUNT);
1389 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1391 Perl_csighandler_init(void)
1394 if (PL_sig_handlers_initted) return;
1396 for (sig = 1; sig < SIG_SIZE; sig++) {
1397 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1399 PL_sig_defaulting[sig] = 1;
1400 (void) rsignal(sig, PL_csighandlerp);
1402 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1403 PL_sig_ignoring[sig] = 0;
1406 PL_sig_handlers_initted = 1;
1411 Perl_despatch_signals(pTHX)
1416 for (sig = 1; sig < SIG_SIZE; sig++) {
1417 if (PL_psig_pend[sig]) {
1418 PERL_BLOCKSIG_ADD(set, sig);
1419 PL_psig_pend[sig] = 0;
1420 PERL_BLOCKSIG_BLOCK(set);
1421 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1422 (*PL_sighandlerp)(sig, NULL, NULL);
1424 (*PL_sighandlerp)(sig);
1426 PERL_BLOCKSIG_UNBLOCK(set);
1432 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1437 /* Need to be careful with SvREFCNT_dec(), because that can have side
1438 * effects (due to closures). We must make sure that the new disposition
1439 * is in place before it is called.
1443 #ifdef HAS_SIGPROCMASK
1447 register const char *s = MgPV_const(mg,len);
1449 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1452 if (strEQ(s,"__DIE__"))
1454 else if (strEQ(s,"__WARN__"))
1457 Perl_croak(aTHX_ "No such hook: %s", s);
1460 if (*svp != PERL_WARNHOOK_FATAL)
1466 i = whichsig(s); /* ...no, a brick */
1468 if (ckWARN(WARN_SIGNAL))
1469 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1472 #ifdef HAS_SIGPROCMASK
1473 /* Avoid having the signal arrive at a bad time, if possible. */
1476 sigprocmask(SIG_BLOCK, &set, &save);
1478 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
1479 SAVEFREESV(save_sv);
1480 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1483 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1484 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1486 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1487 PL_sig_ignoring[i] = 0;
1489 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1490 PL_sig_defaulting[i] = 0;
1492 SvREFCNT_dec(PL_psig_name[i]);
1493 to_dec = PL_psig_ptr[i];
1494 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1495 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1496 PL_psig_name[i] = newSVpvn(s, len);
1497 SvREADONLY_on(PL_psig_name[i]);
1499 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1501 (void)rsignal(i, PL_csighandlerp);
1502 #ifdef HAS_SIGPROCMASK
1507 *svp = SvREFCNT_inc_simple_NN(sv);
1509 SvREFCNT_dec(to_dec);
1512 s = SvOK(sv) ? SvPV_force(sv,len) : "DEFAULT";
1513 if (strEQ(s,"IGNORE")) {
1515 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1516 PL_sig_ignoring[i] = 1;
1517 (void)rsignal(i, PL_csighandlerp);
1519 (void)rsignal(i, (Sighandler_t) SIG_IGN);
1523 else if (strEQ(s,"DEFAULT") || !*s) {
1525 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1527 PL_sig_defaulting[i] = 1;
1528 (void)rsignal(i, PL_csighandlerp);
1531 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1536 * We should warn if HINT_STRICT_REFS, but without
1537 * access to a known hint bit in a known OP, we can't
1538 * tell whether HINT_STRICT_REFS is in force or not.
1540 if (!strchr(s,':') && !strchr(s,'\''))
1541 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1544 (void)rsignal(i, PL_csighandlerp);
1546 *svp = SvREFCNT_inc_simple_NN(sv);
1548 #ifdef HAS_SIGPROCMASK
1553 SvREFCNT_dec(to_dec);
1556 #endif /* !PERL_MICRO */
1559 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1564 PERL_ARGS_ASSERT_MAGIC_SETISA;
1565 PERL_UNUSED_ARG(sv);
1567 /* Bail out if destruction is going on */
1568 if(PL_dirty) return 0;
1570 /* Skip _isaelem because _isa will handle it shortly */
1571 if (PL_delaymagic & DM_ARRAY && mg->mg_type == PERL_MAGIC_isaelem)
1574 /* XXX Once it's possible, we need to
1575 detect that our @ISA is aliased in
1576 other stashes, and act on the stashes
1577 of all of the aliases */
1579 /* The first case occurs via setisa,
1580 the second via setisa_elem, which
1581 calls this same magic */
1583 SvTYPE(mg->mg_obj) == SVt_PVGV
1585 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
1589 mro_isa_changed_in(stash);
1595 Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1600 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1602 /* Bail out if destruction is going on */
1603 if(PL_dirty) return 0;
1607 /* XXX see comments in magic_setisa */
1609 SvTYPE(mg->mg_obj) == SVt_PVGV
1611 : (GV*)SvMAGIC(mg->mg_obj)->mg_obj
1615 mro_isa_changed_in(stash);
1621 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1624 PERL_ARGS_ASSERT_MAGIC_SETAMAGIC;
1625 PERL_UNUSED_ARG(sv);
1626 PERL_UNUSED_ARG(mg);
1627 PL_amagic_generation++;
1633 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1635 HV * const hv = (HV*)LvTARG(sv);
1638 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
1639 PERL_UNUSED_ARG(mg);
1642 (void) hv_iterinit(hv);
1643 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1646 while (hv_iternext(hv))
1651 sv_setiv(sv, (IV)i);
1656 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1658 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
1659 PERL_UNUSED_ARG(mg);
1661 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1666 /* caller is responsible for stack switching/cleanup */
1668 S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
1673 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1677 PUSHs(SvTIED_obj(sv, mg));
1680 if (mg->mg_len >= 0)
1681 mPUSHp(mg->mg_ptr, mg->mg_len);
1682 else if (mg->mg_len == HEf_SVKEY)
1683 PUSHs((SV*)mg->mg_ptr);
1685 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1694 return call_method(meth, flags);
1698 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
1702 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1706 PUSHSTACKi(PERLSI_MAGIC);
1708 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1709 sv_setsv(sv, *PL_stack_sp--);
1719 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1721 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1724 mg->mg_flags |= MGf_GSKIP;
1725 magic_methpack(sv,mg,"FETCH");
1730 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1734 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1737 PUSHSTACKi(PERLSI_MAGIC);
1738 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1745 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1747 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1749 return magic_methpack(sv,mg,"DELETE");
1754 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1759 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1763 PUSHSTACKi(PERLSI_MAGIC);
1764 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1765 sv = *PL_stack_sp--;
1766 retval = SvIV(sv)-1;
1768 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
1773 return (U32) retval;
1777 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1781 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1784 PUSHSTACKi(PERLSI_MAGIC);
1786 XPUSHs(SvTIED_obj(sv, mg));
1788 call_method("CLEAR", G_SCALAR|G_DISCARD);
1796 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1799 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1801 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1805 PUSHSTACKi(PERLSI_MAGIC);
1808 PUSHs(SvTIED_obj(sv, mg));
1813 if (call_method(meth, G_SCALAR))
1814 sv_setsv(key, *PL_stack_sp--);
1823 Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
1825 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1827 return magic_methpack(sv,mg,"EXISTS");
1831 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1835 SV * const tied = SvTIED_obj((SV*)hv, mg);
1836 HV * const pkg = SvSTASH((SV*)SvRV(tied));
1838 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1840 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1842 if (HvEITER_get(hv))
1843 /* we are in an iteration so the hash cannot be empty */
1845 /* no xhv_eiter so now use FIRSTKEY */
1846 key = sv_newmortal();
1847 magic_nextpack((SV*)hv, mg, key);
1848 HvEITER_set(hv, NULL); /* need to reset iterator */
1849 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1852 /* there is a SCALAR method that we can call */
1854 PUSHSTACKi(PERLSI_MAGIC);
1860 if (call_method("SCALAR", G_SCALAR))
1861 retval = *PL_stack_sp--;
1863 retval = &PL_sv_undef;
1870 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1873 GV * const gv = PL_DBline;
1874 const I32 i = SvTRUE(sv);
1875 SV ** const svp = av_fetch(GvAV(gv),
1876 atoi(MgPV_nolen_const(mg)), FALSE);
1878 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
1880 if (svp && SvIOKp(*svp)) {
1881 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1883 /* set or clear breakpoint in the relevant control op */
1885 o->op_flags |= OPf_SPECIAL;
1887 o->op_flags &= ~OPf_SPECIAL;
1894 Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
1897 const AV * const obj = (AV*)mg->mg_obj;
1899 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
1902 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
1910 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1913 AV * const obj = (AV*)mg->mg_obj;
1915 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
1918 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
1920 if (ckWARN(WARN_MISC))
1921 Perl_warner(aTHX_ packWARN(WARN_MISC),
1922 "Attempt to set length of freed array");
1928 Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1932 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
1933 PERL_UNUSED_ARG(sv);
1935 /* during global destruction, mg_obj may already have been freed */
1936 if (PL_in_clean_all)
1939 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1942 /* arylen scalar holds a pointer back to the array, but doesn't own a
1943 reference. Hence the we (the array) are about to go away with it
1944 still pointing at us. Clear its pointer, else it would be pointing
1945 at free memory. See the comment in sv_magic about reference loops,
1946 and why it can't own a reference to us. */
1953 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1956 SV* const lsv = LvTARG(sv);
1958 PERL_ARGS_ASSERT_MAGIC_GETPOS;
1959 PERL_UNUSED_ARG(mg);
1961 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1962 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1963 if (found && found->mg_len >= 0) {
1964 I32 i = found->mg_len;
1966 sv_pos_b2u(lsv, &i);
1967 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
1976 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1979 SV* const lsv = LvTARG(sv);
1985 PERL_ARGS_ASSERT_MAGIC_SETPOS;
1986 PERL_UNUSED_ARG(mg);
1988 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1989 found = mg_find(lsv, PERL_MAGIC_regex_global);
1995 #ifdef PERL_OLD_COPY_ON_WRITE
1997 sv_force_normal_flags(lsv, 0);
1999 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
2002 else if (!SvOK(sv)) {
2006 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
2008 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
2011 ulen = sv_len_utf8(lsv);
2021 else if (pos > (SSize_t)len)
2026 sv_pos_u2b(lsv, &p, 0);
2030 found->mg_len = pos;
2031 found->mg_flags &= ~MGf_MINMATCH;
2037 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
2040 SV * const lsv = LvTARG(sv);
2041 const char * const tmps = SvPV_const(lsv,len);
2042 I32 offs = LvTARGOFF(sv);
2043 I32 rem = LvTARGLEN(sv);
2045 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
2046 PERL_UNUSED_ARG(mg);
2049 sv_pos_u2b(lsv, &offs, &rem);
2050 if (offs > (I32)len)
2052 if (rem + offs > (I32)len)
2054 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
2061 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
2065 const char * const tmps = SvPV_const(sv, len);
2066 SV * const lsv = LvTARG(sv);
2067 I32 lvoff = LvTARGOFF(sv);
2068 I32 lvlen = LvTARGLEN(sv);
2070 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
2071 PERL_UNUSED_ARG(mg);
2074 sv_utf8_upgrade(lsv);
2075 sv_pos_u2b(lsv, &lvoff, &lvlen);
2076 sv_insert(lsv, lvoff, lvlen, tmps, len);
2077 LvTARGLEN(sv) = sv_len_utf8(sv);
2080 else if (lsv && SvUTF8(lsv)) {
2082 sv_pos_u2b(lsv, &lvoff, &lvlen);
2083 LvTARGLEN(sv) = len;
2084 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
2085 sv_insert(lsv, lvoff, lvlen, utf8, len);
2089 sv_insert(lsv, lvoff, lvlen, tmps, len);
2090 LvTARGLEN(sv) = len;
2098 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
2102 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
2103 PERL_UNUSED_ARG(sv);
2105 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
2110 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
2114 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
2115 PERL_UNUSED_ARG(sv);
2117 /* update taint status */
2126 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
2128 SV * const lsv = LvTARG(sv);
2130 PERL_ARGS_ASSERT_MAGIC_GETVEC;
2131 PERL_UNUSED_ARG(mg);
2134 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2142 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
2144 PERL_ARGS_ASSERT_MAGIC_SETVEC;
2145 PERL_UNUSED_ARG(mg);
2146 do_vecset(sv); /* XXX slurp this routine */
2151 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
2156 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2158 if (LvTARGLEN(sv)) {
2160 SV * const ahv = LvTARG(sv);
2161 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
2166 AV* const av = (AV*)LvTARG(sv);
2167 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2168 targ = AvARRAY(av)[LvTARGOFF(sv)];
2170 if (targ && (targ != &PL_sv_undef)) {
2171 /* somebody else defined it for us */
2172 SvREFCNT_dec(LvTARG(sv));
2173 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
2175 SvREFCNT_dec(mg->mg_obj);
2177 mg->mg_flags &= ~MGf_REFCOUNTED;
2182 sv_setsv(sv, targ ? targ : &PL_sv_undef);
2187 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
2189 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
2190 PERL_UNUSED_ARG(mg);
2194 sv_setsv(LvTARG(sv), sv);
2195 SvSETMAGIC(LvTARG(sv));
2201 Perl_vivify_defelem(pTHX_ SV *sv)
2207 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2209 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
2212 SV * const ahv = LvTARG(sv);
2213 HE * const he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
2216 if (!value || value == &PL_sv_undef)
2217 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
2220 AV* const av = (AV*)LvTARG(sv);
2221 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
2222 LvTARG(sv) = NULL; /* array can't be extended */
2224 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
2225 if (!svp || (value = *svp) == &PL_sv_undef)
2226 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
2229 SvREFCNT_inc_simple_void(value);
2230 SvREFCNT_dec(LvTARG(sv));
2233 SvREFCNT_dec(mg->mg_obj);
2235 mg->mg_flags &= ~MGf_REFCOUNTED;
2239 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
2241 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
2242 return Perl_sv_kill_backrefs(aTHX_ sv, (AV*)mg->mg_obj);
2246 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
2248 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
2249 PERL_UNUSED_CONTEXT;
2256 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2258 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2260 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2262 if (uf && uf->uf_set)
2263 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2268 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2270 const char type = mg->mg_type;
2272 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2274 if (type == PERL_MAGIC_qr) {
2275 } else if (type == PERL_MAGIC_bm) {
2279 assert(type == PERL_MAGIC_fm);
2282 return sv_unmagic(sv, type);
2285 #ifdef USE_LOCALE_COLLATE
2287 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2289 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2292 * RenE<eacute> Descartes said "I think not."
2293 * and vanished with a faint plop.
2295 PERL_UNUSED_CONTEXT;
2296 PERL_UNUSED_ARG(sv);
2298 Safefree(mg->mg_ptr);
2304 #endif /* USE_LOCALE_COLLATE */
2306 /* Just clear the UTF-8 cache data. */
2308 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2310 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
2311 PERL_UNUSED_CONTEXT;
2312 PERL_UNUSED_ARG(sv);
2313 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2315 mg->mg_len = -1; /* The mg_len holds the len cache. */
2320 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2323 register const char *s;
2325 register const REGEXP * rx;
2326 const char * const remaining = mg->mg_ptr + 1;
2330 PERL_ARGS_ASSERT_MAGIC_SET;
2332 switch (*mg->mg_ptr) {
2333 case '\015': /* $^MATCH */
2334 if (strEQ(remaining, "ATCH"))
2336 case '`': /* ${^PREMATCH} caught below */
2338 paren = RX_BUFF_IDX_PREMATCH;
2340 case '\'': /* ${^POSTMATCH} caught below */
2342 paren = RX_BUFF_IDX_POSTMATCH;
2346 paren = RX_BUFF_IDX_FULLMATCH;
2348 case '1': case '2': case '3': case '4':
2349 case '5': case '6': case '7': case '8': case '9':
2350 paren = atoi(mg->mg_ptr);
2352 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2353 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2356 /* Croak with a READONLY error when a numbered match var is
2357 * set without a previous pattern match. Unless it's C<local $1>
2359 if (!PL_localizing) {
2360 Perl_croak(aTHX_ PL_no_modify);
2363 case '\001': /* ^A */
2364 sv_setsv(PL_bodytarget, sv);
2366 case '\003': /* ^C */
2367 PL_minus_c = (bool)SvIV(sv);
2370 case '\004': /* ^D */
2372 s = SvPV_nolen_const(sv);
2373 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2374 DEBUG_x(dump_all());
2376 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
2379 case '\005': /* ^E */
2380 if (*(mg->mg_ptr+1) == '\0') {
2381 #ifdef MACOS_TRADITIONAL
2382 gMacPerl_OSErr = SvIV(sv);
2385 set_vaxc_errno(SvIV(sv));
2388 SetLastError( SvIV(sv) );
2391 os2_setsyserrno(SvIV(sv));
2393 /* will anyone ever use this? */
2394 SETERRNO(SvIV(sv), 4);
2400 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2402 SvREFCNT_dec(PL_encoding);
2403 if (SvOK(sv) || SvGMAGICAL(sv)) {
2404 PL_encoding = newSVsv(sv);
2411 case '\006': /* ^F */
2412 PL_maxsysfd = SvIV(sv);
2414 case '\010': /* ^H */
2415 PL_hints = SvIV(sv);
2417 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2418 Safefree(PL_inplace);
2419 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
2421 case '\017': /* ^O */
2422 if (*(mg->mg_ptr+1) == '\0') {
2423 Safefree(PL_osname);
2426 TAINT_PROPER("assigning to $^O");
2427 PL_osname = savesvpv(sv);
2430 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2432 const char *const start = SvPV(sv, len);
2433 const char *out = (const char*)memchr(start, '\0', len);
2435 struct refcounted_he *tmp_he;
2438 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2440 |= HINT_LOCALIZE_HH | HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2442 /* Opening for input is more common than opening for output, so
2443 ensure that hints for input are sooner on linked list. */
2444 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
2445 SVs_TEMP | SvUTF8(sv))
2446 : newSVpvn_flags("", 0, SVs_TEMP | SvUTF8(sv));
2449 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
2450 newSVpvs_flags("open>", SVs_TEMP),
2453 /* The UTF-8 setting is carried over */
2454 sv_setpvn(tmp, start, out ? (STRLEN)(out - start) : len);
2456 PL_compiling.cop_hints_hash
2457 = Perl_refcounted_he_new(aTHX_ tmp_he,
2458 newSVpvs_flags("open<", SVs_TEMP),
2462 case '\020': /* ^P */
2463 if (*remaining == '\0') { /* ^P */
2464 PL_perldb = SvIV(sv);
2465 if (PL_perldb && !PL_DBsingle)
2468 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2470 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2473 case '\024': /* ^T */
2475 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2477 PL_basetime = (Time_t)SvIV(sv);
2480 case '\025': /* ^UTF8CACHE */
2481 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2482 PL_utf8cache = (signed char) sv_2iv(sv);
2485 case '\027': /* ^W & $^WARNING_BITS */
2486 if (*(mg->mg_ptr+1) == '\0') {
2487 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2489 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2490 | (i ? G_WARN_ON : G_WARN_OFF) ;
2493 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2494 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2495 if (!SvPOK(sv) && PL_localizing) {
2496 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2497 PL_compiling.cop_warnings = pWARN_NONE;
2502 int accumulate = 0 ;
2503 int any_fatals = 0 ;
2504 const char * const ptr = SvPV_const(sv, len) ;
2505 for (i = 0 ; i < len ; ++i) {
2506 accumulate |= ptr[i] ;
2507 any_fatals |= (ptr[i] & 0xAA) ;
2510 if (!specialWARN(PL_compiling.cop_warnings))
2511 PerlMemShared_free(PL_compiling.cop_warnings);
2512 PL_compiling.cop_warnings = pWARN_NONE;
2514 /* Yuck. I can't see how to abstract this: */
2515 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2516 WARN_ALL) && !any_fatals) {
2517 if (!specialWARN(PL_compiling.cop_warnings))
2518 PerlMemShared_free(PL_compiling.cop_warnings);
2519 PL_compiling.cop_warnings = pWARN_ALL;
2520 PL_dowarn |= G_WARN_ONCE ;
2524 const char *const p = SvPV_const(sv, len);
2526 PL_compiling.cop_warnings
2527 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
2530 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2531 PL_dowarn |= G_WARN_ONCE ;
2539 if (PL_localizing) {
2540 if (PL_localizing == 1)
2541 SAVESPTR(PL_last_in_gv);
2543 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2544 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2547 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2548 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2549 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2552 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2553 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2554 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2557 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
2560 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2561 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2562 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2565 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
2569 IO * const io = GvIOp(PL_defoutgv);
2572 if ((SvIV(sv)) == 0)
2573 IoFLAGS(io) &= ~IOf_FLUSH;
2575 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2576 PerlIO *ofp = IoOFP(io);
2578 (void)PerlIO_flush(ofp);
2579 IoFLAGS(io) |= IOf_FLUSH;
2585 SvREFCNT_dec(PL_rs);
2586 PL_rs = newSVsv(sv);
2590 SvREFCNT_dec(PL_ors_sv);
2591 if (SvOK(sv) || SvGMAGICAL(sv)) {
2592 PL_ors_sv = newSVsv(sv);
2600 SvREFCNT_dec(PL_ofs_sv);
2601 if (SvOK(sv) || SvGMAGICAL(sv)) {
2602 PL_ofs_sv = newSVsv(sv);
2609 CopARYBASE_set(&PL_compiling, SvIV(sv));
2612 #ifdef COMPLEX_STATUS
2613 if (PL_localizing == 2) {
2614 PL_statusvalue = LvTARGOFF(sv);
2615 PL_statusvalue_vms = LvTARGLEN(sv);
2619 #ifdef VMSISH_STATUS
2621 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
2624 STATUS_UNIX_EXIT_SET(SvIV(sv));
2629 # define PERL_VMS_BANG vaxc$errno
2631 # define PERL_VMS_BANG 0
2633 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2634 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2639 if (PL_delaymagic) {
2640 PL_delaymagic |= DM_RUID;
2641 break; /* don't do magic till later */
2644 (void)setruid((Uid_t)PL_uid);
2647 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2649 #ifdef HAS_SETRESUID
2650 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2652 if (PL_uid == PL_euid) { /* special case $< = $> */
2654 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2655 if (PL_uid != 0 && PerlProc_getuid() == 0)
2656 (void)PerlProc_setuid(0);
2658 (void)PerlProc_setuid(PL_uid);
2660 PL_uid = PerlProc_getuid();
2661 Perl_croak(aTHX_ "setruid() not implemented");
2666 PL_uid = PerlProc_getuid();
2667 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2671 if (PL_delaymagic) {
2672 PL_delaymagic |= DM_EUID;
2673 break; /* don't do magic till later */
2676 (void)seteuid((Uid_t)PL_euid);
2679 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2681 #ifdef HAS_SETRESUID
2682 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2684 if (PL_euid == PL_uid) /* special case $> = $< */
2685 PerlProc_setuid(PL_euid);
2687 PL_euid = PerlProc_geteuid();
2688 Perl_croak(aTHX_ "seteuid() not implemented");
2693 PL_euid = PerlProc_geteuid();
2694 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2698 if (PL_delaymagic) {
2699 PL_delaymagic |= DM_RGID;
2700 break; /* don't do magic till later */
2703 (void)setrgid((Gid_t)PL_gid);
2706 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2708 #ifdef HAS_SETRESGID
2709 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2711 if (PL_gid == PL_egid) /* special case $( = $) */
2712 (void)PerlProc_setgid(PL_gid);
2714 PL_gid = PerlProc_getgid();
2715 Perl_croak(aTHX_ "setrgid() not implemented");
2720 PL_gid = PerlProc_getgid();
2721 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2724 #ifdef HAS_SETGROUPS
2726 const char *p = SvPV_const(sv, len);
2727 Groups_t *gary = NULL;
2732 for (i = 0; i < NGROUPS; ++i) {
2733 while (*p && !isSPACE(*p))
2740 Newx(gary, i + 1, Groups_t);
2742 Renew(gary, i + 1, Groups_t);
2746 (void)setgroups(i, gary);
2749 #else /* HAS_SETGROUPS */
2751 #endif /* HAS_SETGROUPS */
2752 if (PL_delaymagic) {
2753 PL_delaymagic |= DM_EGID;
2754 break; /* don't do magic till later */
2757 (void)setegid((Gid_t)PL_egid);
2760 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2762 #ifdef HAS_SETRESGID
2763 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2765 if (PL_egid == PL_gid) /* special case $) = $( */
2766 (void)PerlProc_setgid(PL_egid);
2768 PL_egid = PerlProc_getegid();
2769 Perl_croak(aTHX_ "setegid() not implemented");
2774 PL_egid = PerlProc_getegid();
2775 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2778 PL_chopset = SvPV_force(sv,len);
2780 #ifndef MACOS_TRADITIONAL
2782 LOCK_DOLLARZERO_MUTEX;
2783 #ifdef HAS_SETPROCTITLE
2784 /* The BSDs don't show the argv[] in ps(1) output, they
2785 * show a string from the process struct and provide
2786 * the setproctitle() routine to manipulate that. */
2787 if (PL_origalen != 1) {
2788 s = SvPV_const(sv, len);
2789 # if __FreeBSD_version > 410001
2790 /* The leading "-" removes the "perl: " prefix,
2791 * but not the "(perl) suffix from the ps(1)
2792 * output, because that's what ps(1) shows if the
2793 * argv[] is modified. */
2794 setproctitle("-%s", s);
2795 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2796 /* This doesn't really work if you assume that
2797 * $0 = 'foobar'; will wipe out 'perl' from the $0
2798 * because in ps(1) output the result will be like
2799 * sprintf("perl: %s (perl)", s)
2800 * I guess this is a security feature:
2801 * one (a user process) cannot get rid of the original name.
2803 setproctitle("%s", s);
2806 #elif defined(__hpux) && defined(PSTAT_SETCMD)
2807 if (PL_origalen != 1) {
2809 s = SvPV_const(sv, len);
2810 un.pst_command = (char *)s;
2811 pstat(PSTAT_SETCMD, un, len, 0, 0);
2814 if (PL_origalen > 1) {
2815 /* PL_origalen is set in perl_parse(). */
2816 s = SvPV_force(sv,len);
2817 if (len >= (STRLEN)PL_origalen-1) {
2818 /* Longer than original, will be truncated. We assume that
2819 * PL_origalen bytes are available. */
2820 Copy(s, PL_origargv[0], PL_origalen-1, char);
2823 /* Shorter than original, will be padded. */
2825 /* Special case for Mac OS X: see [perl #38868] */
2828 /* Is the space counterintuitive? Yes.
2829 * (You were expecting \0?)
2830 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2832 const int pad = ' ';
2834 Copy(s, PL_origargv[0], len, char);
2835 PL_origargv[0][len] = 0;
2836 memset(PL_origargv[0] + len + 1,
2837 pad, PL_origalen - len - 1);
2839 PL_origargv[0][PL_origalen-1] = 0;
2840 for (i = 1; i < PL_origargc; i++)
2844 UNLOCK_DOLLARZERO_MUTEX;
2852 Perl_whichsig(pTHX_ const char *sig)
2854 register char* const* sigv;
2856 PERL_ARGS_ASSERT_WHICHSIG;
2857 PERL_UNUSED_CONTEXT;
2859 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
2860 if (strEQ(sig,*sigv))
2861 return PL_sig_num[sigv - (char* const*)PL_sig_name];
2863 if (strEQ(sig,"CHLD"))
2867 if (strEQ(sig,"CLD"))
2874 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2875 Perl_sighandler(int sig, siginfo_t *sip, void *uap PERL_UNUSED_DECL)
2877 Perl_sighandler(int sig)
2880 #ifdef PERL_GET_SIG_CONTEXT
2881 dTHXa(PERL_GET_SIG_CONTEXT);
2888 SV * const tSv = PL_Sv;
2892 XPV * const tXpv = PL_Xpv;
2894 if (PL_savestack_ix + 15 <= PL_savestack_max)
2896 if (PL_markstack_ptr < PL_markstack_max - 2)
2898 if (PL_scopestack_ix < PL_scopestack_max - 3)
2901 if (!PL_psig_ptr[sig]) {
2902 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2907 /* Max number of items pushed there is 3*n or 4. We cannot fix
2908 infinity, so we fix 4 (in fact 5): */
2910 PL_savestack_ix += 5; /* Protect save in progress. */
2911 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
2914 PL_markstack_ptr++; /* Protect mark. */
2916 PL_scopestack_ix += 1;
2917 /* sv_2cv is too complicated, try a simpler variant first: */
2918 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2919 || SvTYPE(cv) != SVt_PVCV) {
2921 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
2924 if (!cv || !CvROOT(cv)) {
2925 if (ckWARN(WARN_SIGNAL))
2926 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2927 PL_sig_name[sig], (gv ? GvENAME(gv)
2934 if(PL_psig_name[sig]) {
2935 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
2937 #if !defined(PERL_IMPLICIT_CONTEXT)
2941 sv = sv_newmortal();
2942 sv_setpv(sv,PL_sig_name[sig]);
2945 PUSHSTACKi(PERLSI_SIGNAL);
2948 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2950 struct sigaction oact;
2952 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
2955 SV *rv = newRV_noinc((SV*)sih);
2956 /* The siginfo fields signo, code, errno, pid, uid,
2957 * addr, status, and band are defined by POSIX/SUSv3. */
2958 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
2959 (void)hv_stores(sih, "code", newSViv(sip->si_code));
2960 #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. */
2961 hv_stores(sih, "errno", newSViv(sip->si_errno));
2962 hv_stores(sih, "status", newSViv(sip->si_status));
2963 hv_stores(sih, "uid", newSViv(sip->si_uid));
2964 hv_stores(sih, "pid", newSViv(sip->si_pid));
2965 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
2966 hv_stores(sih, "band", newSViv(sip->si_band));
2970 mPUSHp((char *)sip, sizeof(*sip));
2978 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2981 if (SvTRUE(ERRSV)) {
2983 #ifdef HAS_SIGPROCMASK
2984 /* Handler "died", for example to get out of a restart-able read().
2985 * Before we re-do that on its behalf re-enable the signal which was
2986 * blocked by the system when we entered.
2990 sigaddset(&set,sig);
2991 sigprocmask(SIG_UNBLOCK, &set, NULL);
2993 /* Not clear if this will work */
2994 (void)rsignal(sig, SIG_IGN);
2995 (void)rsignal(sig, PL_csighandlerp);
2997 #endif /* !PERL_MICRO */
2998 Perl_die(aTHX_ NULL);
3002 PL_savestack_ix -= 8; /* Unprotect save in progress. */
3006 PL_scopestack_ix -= 1;
3009 PL_op = myop; /* Apparently not needed... */
3011 PL_Sv = tSv; /* Restore global temporaries. */
3018 S_restore_magic(pTHX_ const void *p)
3021 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3022 SV* const sv = mgs->mgs_sv;
3027 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
3029 #ifdef PERL_OLD_COPY_ON_WRITE
3030 /* While magic was saved (and off) sv_setsv may well have seen
3031 this SV as a prime candidate for COW. */
3033 sv_force_normal_flags(sv, 0);
3037 SvFLAGS(sv) |= mgs->mgs_flags;
3040 if (SvGMAGICAL(sv)) {
3041 /* downgrade public flags to private,
3042 and discard any other private flags */
3044 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
3046 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
3047 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
3052 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3054 /* If we're still on top of the stack, pop us off. (That condition
3055 * will be satisfied if restore_magic was called explicitly, but *not*
3056 * if it's being called via leave_scope.)
3057 * The reason for doing this is that otherwise, things like sv_2cv()
3058 * may leave alloc gunk on the savestack, and some code
3059 * (e.g. sighandler) doesn't expect that...
3061 if (PL_savestack_ix == mgs->mgs_ss_ix)
3063 I32 popval = SSPOPINT;
3064 assert(popval == SAVEt_DESTRUCTOR_X);
3065 PL_savestack_ix -= 2;
3067 assert(popval == SAVEt_ALLOC);
3069 PL_savestack_ix -= popval;
3075 S_unwind_handler_stack(pTHX_ const void *p)
3078 const U32 flags = *(const U32*)p;
3080 PERL_ARGS_ASSERT_UNWIND_HANDLER_STACK;
3083 PL_savestack_ix -= 5; /* Unprotect save in progress. */
3084 #if !defined(PERL_IMPLICIT_CONTEXT)
3086 SvREFCNT_dec(PL_sig_sv);
3091 =for apidoc magic_sethint
3093 Triggered by a store to %^H, records the key/value pair to
3094 C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3095 anything that would need a deep copy. Maybe we should warn if we find a
3101 Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3104 SV *key = (mg->mg_len == HEf_SVKEY) ? (SV *)mg->mg_ptr
3105 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
3107 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3109 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3110 an alternative leaf in there, with PL_compiling.cop_hints being used if
3111 it's NULL. If needed for threads, the alternative could lock a mutex,
3112 or take other more complex action. */
3114 /* Something changed in %^H, so it will need to be restored on scope exit.
3115 Doing this here saves a lot of doing it manually in perl code (and
3116 forgetting to do it, and consequent subtle errors. */
3117 PL_hints |= HINT_LOCALIZE_HH;
3118 PL_compiling.cop_hints_hash
3119 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash, key, sv);
3124 =for apidoc magic_clearhint
3126 Triggered by a delete from %^H, records the key to
3127 C<PL_compiling.cop_hints_hash>.
3132 Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3136 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
3137 PERL_UNUSED_ARG(sv);
3139 assert(mg->mg_len == HEf_SVKEY);
3141 PERL_UNUSED_ARG(sv);
3143 PL_hints |= HINT_LOCALIZE_HH;
3144 PL_compiling.cop_hints_hash
3145 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
3146 (SV *)mg->mg_ptr, &PL_sv_placeholder);
3152 * c-indentation-style: bsd
3154 * indent-tabs-mode: t
3157 * ex: set ts=8 sts=4 sw=4 noet: