3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005 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)
52 # include <sys/pstat.h>
55 Signal_t Perl_csighandler(int sig);
57 static void restore_magic(pTHX_ const void *p);
58 static void unwind_handler_stack(pTHX_ const void *p);
61 /* Missing protos on LynxOS */
62 void setruid(uid_t id);
63 void seteuid(uid_t id);
64 void setrgid(uid_t id);
65 void setegid(uid_t id);
69 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
77 /* MGS is typedef'ed to struct magic_state in perl.h */
80 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
83 assert(SvMAGICAL(sv));
84 #ifdef PERL_OLD_COPY_ON_WRITE
85 /* Turning READONLY off for a copy-on-write scalar is a bad idea. */
90 SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
92 mgs = SSPTR(mgs_ix, MGS*);
94 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
95 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
99 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
103 =for apidoc mg_magical
105 Turns on the magical status of an SV. See C<sv_magic>.
111 Perl_mg_magical(pTHX_ SV *sv)
114 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
115 const MGVTBL* const vtbl = mg->mg_virtual;
117 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
121 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
130 Do magic after a value is retrieved from the SV. See C<sv_magic>.
136 Perl_mg_get(pTHX_ SV *sv)
138 const I32 mgs_ix = SSNEW(sizeof(MGS));
139 const bool was_temp = (bool)SvTEMP(sv);
141 MAGIC *newmg, *head, *cur, *mg;
142 /* guard against sv having being freed midway by holding a private
145 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
146 cause the SV's buffer to get stolen (and maybe other stuff).
149 sv_2mortal(SvREFCNT_inc(sv));
154 save_magic(mgs_ix, sv);
156 /* We must call svt_get(sv, mg) for each valid entry in the linked
157 list of magic. svt_get() may delete the current entry, add new
158 magic to the head of the list, or upgrade the SV. AMS 20010810 */
160 newmg = cur = head = mg = SvMAGIC(sv);
162 const MGVTBL * const vtbl = mg->mg_virtual;
164 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
165 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
167 /* guard against magic having been deleted - eg FETCH calling
172 /* Don't restore the flags for this entry if it was deleted. */
173 if (mg->mg_flags & MGf_GSKIP)
174 (SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
177 mg = mg->mg_moremagic;
180 /* Have we finished with the new entries we saw? Start again
181 where we left off (unless there are more new entries). */
189 /* Were any new entries added? */
190 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
197 restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
199 if (SvREFCNT(sv) == 1) {
200 /* We hold the last reference to this SV, which implies that the
201 SV was deleted as a side effect of the routines we called. */
210 Do magic after a value is assigned to the SV. See C<sv_magic>.
216 Perl_mg_set(pTHX_ SV *sv)
218 const I32 mgs_ix = SSNEW(sizeof(MGS));
222 save_magic(mgs_ix, sv);
224 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
225 const MGVTBL* vtbl = mg->mg_virtual;
226 nextmg = mg->mg_moremagic; /* it may delete itself */
227 if (mg->mg_flags & MGf_GSKIP) {
228 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
229 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
231 if (vtbl && vtbl->svt_set)
232 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
235 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
240 =for apidoc mg_length
242 Report on the SV's length. See C<sv_magic>.
248 Perl_mg_length(pTHX_ SV *sv)
253 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
254 const MGVTBL * const vtbl = mg->mg_virtual;
255 if (vtbl && vtbl->svt_len) {
256 const I32 mgs_ix = SSNEW(sizeof(MGS));
257 save_magic(mgs_ix, sv);
258 /* omit MGf_GSKIP -- not changed here */
259 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
260 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
266 const U8 *s = (U8*)SvPV_const(sv, len);
267 len = Perl_utf8_length(aTHX_ s, s + len);
270 (void)SvPV_const(sv, len);
275 Perl_mg_size(pTHX_ SV *sv)
279 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
280 const MGVTBL* const vtbl = mg->mg_virtual;
281 if (vtbl && vtbl->svt_len) {
282 const I32 mgs_ix = SSNEW(sizeof(MGS));
284 save_magic(mgs_ix, sv);
285 /* omit MGf_GSKIP -- not changed here */
286 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
287 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
294 return AvFILLp((AV *) sv); /* Fallback to non-tied array */
298 Perl_croak(aTHX_ "Size magic not implemented");
307 Clear something magical that the SV represents. See C<sv_magic>.
313 Perl_mg_clear(pTHX_ SV *sv)
315 const I32 mgs_ix = SSNEW(sizeof(MGS));
318 save_magic(mgs_ix, sv);
320 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
321 const MGVTBL* const vtbl = mg->mg_virtual;
322 /* omit GSKIP -- never set here */
324 if (vtbl && vtbl->svt_clear)
325 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
328 restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
335 Finds the magic pointer for type matching the SV. See C<sv_magic>.
341 Perl_mg_find(pTHX_ const SV *sv, int type)
345 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
346 if (mg->mg_type == type)
356 Copies the magic from one SV to another. See C<sv_magic>.
362 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
366 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
367 const MGVTBL* const vtbl = mg->mg_virtual;
368 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
369 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
371 else if (isUPPER(mg->mg_type)) {
373 mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
374 (mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
376 toLOWER(mg->mg_type), key, klen);
386 Free any magic storage used by the SV. See C<sv_magic>.
392 Perl_mg_free(pTHX_ SV *sv)
396 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
397 const MGVTBL* const vtbl = mg->mg_virtual;
398 moremagic = mg->mg_moremagic;
399 if (vtbl && vtbl->svt_free)
400 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
401 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
402 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
403 Safefree(mg->mg_ptr);
404 else if (mg->mg_len == HEf_SVKEY)
405 SvREFCNT_dec((SV*)mg->mg_ptr);
407 if (mg->mg_flags & MGf_REFCOUNTED)
408 SvREFCNT_dec(mg->mg_obj);
411 SvMAGIC_set(sv, NULL);
418 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
420 register const REGEXP *rx;
423 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
424 if (mg->mg_obj) /* @+ */
427 return rx->lastparen;
434 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
438 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
439 register const I32 paren = mg->mg_len;
444 if (paren <= (I32)rx->nparens &&
445 (s = rx->startp[paren]) != -1 &&
446 (t = rx->endp[paren]) != -1)
449 if (mg->mg_obj) /* @+ */
454 if (i > 0 && RX_MATCH_UTF8(rx)) {
455 char *b = rx->subbeg;
457 i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
467 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
470 Perl_croak(aTHX_ PL_no_modify);
471 NORETURN_FUNCTION_END;
475 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
479 register const REGEXP *rx;
482 switch (*mg->mg_ptr) {
483 case '1': case '2': case '3': case '4':
484 case '5': case '6': case '7': case '8': case '9': case '&':
485 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
487 paren = atoi(mg->mg_ptr); /* $& is in [0] */
489 if (paren <= (I32)rx->nparens &&
490 (s1 = rx->startp[paren]) != -1 &&
491 (t1 = rx->endp[paren]) != -1)
495 if (i > 0 && RX_MATCH_UTF8(rx)) {
496 char *s = rx->subbeg + s1;
501 if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
505 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
509 if (ckWARN(WARN_UNINITIALIZED))
514 if (ckWARN(WARN_UNINITIALIZED))
519 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
520 paren = rx->lastparen;
525 case '\016': /* ^N */
526 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
527 paren = rx->lastcloseparen;
533 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
534 if (rx->startp[0] != -1) {
545 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
546 if (rx->endp[0] != -1) {
547 i = rx->sublen - rx->endp[0];
558 if (!SvPOK(sv) && SvNIOK(sv)) {
567 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
571 register char *s = NULL;
575 switch (*mg->mg_ptr) {
576 case '\001': /* ^A */
577 sv_setsv(sv, PL_bodytarget);
579 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
580 if (*(mg->mg_ptr+1) == '\0') {
581 sv_setiv(sv, (IV)PL_minus_c);
583 else if (strEQ(mg->mg_ptr, "\003HILD_ERROR_NATIVE")) {
584 sv_setiv(sv, (IV)STATUS_NATIVE);
588 case '\004': /* ^D */
589 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
591 case '\005': /* ^E */
592 if (*(mg->mg_ptr+1) == '\0') {
593 #ifdef MACOS_TRADITIONAL
597 sv_setnv(sv,(double)gMacPerl_OSErr);
598 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
603 # include <descrip.h>
604 # include <starlet.h>
606 $DESCRIPTOR(msgdsc,msg);
607 sv_setnv(sv,(NV) vaxc$errno);
608 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
609 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
615 if (!(_emx_env & 0x200)) { /* Under DOS */
616 sv_setnv(sv, (NV)errno);
617 sv_setpv(sv, errno ? Strerror(errno) : "");
619 if (errno != errno_isOS2) {
620 int tmp = _syserrno();
621 if (tmp) /* 2nd call to _syserrno() makes it 0 */
624 sv_setnv(sv, (NV)Perl_rc);
625 sv_setpv(sv, os2error(Perl_rc));
630 DWORD dwErr = GetLastError();
631 sv_setnv(sv, (NV)dwErr);
634 PerlProc_GetOSError(sv, dwErr);
637 sv_setpvn(sv, "", 0);
642 int saveerrno = errno;
643 sv_setnv(sv, (NV)errno);
644 sv_setpv(sv, errno ? Strerror(errno) : "");
651 SvNOK_on(sv); /* what a wonderful hack! */
653 else if (strEQ(mg->mg_ptr+1, "NCODING"))
654 sv_setsv(sv, PL_encoding);
656 case '\006': /* ^F */
657 sv_setiv(sv, (IV)PL_maxsysfd);
659 case '\010': /* ^H */
660 sv_setiv(sv, (IV)PL_hints);
662 case '\011': /* ^I */ /* NOT \t in EBCDIC */
664 sv_setpv(sv, PL_inplace);
666 sv_setsv(sv, &PL_sv_undef);
668 case '\017': /* ^O & ^OPEN */
669 if (*(mg->mg_ptr+1) == '\0') {
670 sv_setpv(sv, PL_osname);
673 else if (strEQ(mg->mg_ptr, "\017PEN")) {
674 if (!PL_compiling.cop_io)
675 sv_setsv(sv, &PL_sv_undef);
677 sv_setsv(sv, PL_compiling.cop_io);
681 case '\020': /* ^P */
682 sv_setiv(sv, (IV)PL_perldb);
684 case '\023': /* ^S */
685 if (*(mg->mg_ptr+1) == '\0') {
686 if (PL_lex_state != LEX_NOTPARSING)
689 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
694 case '\024': /* ^T */
695 if (*(mg->mg_ptr+1) == '\0') {
697 sv_setnv(sv, PL_basetime);
699 sv_setiv(sv, (IV)PL_basetime);
702 else if (strEQ(mg->mg_ptr, "\024AINT"))
703 sv_setiv(sv, PL_tainting
704 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
707 case '\025': /* $^UNICODE, $^UTF8LOCALE */
708 if (strEQ(mg->mg_ptr, "\025NICODE"))
709 sv_setuv(sv, (UV) PL_unicode);
710 else if (strEQ(mg->mg_ptr, "\025TF8LOCALE"))
711 sv_setuv(sv, (UV) PL_utf8locale);
713 case '\027': /* ^W & $^WARNING_BITS */
714 if (*(mg->mg_ptr+1) == '\0')
715 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
716 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
717 if (PL_compiling.cop_warnings == pWARN_NONE ||
718 PL_compiling.cop_warnings == pWARN_STD)
720 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
722 else if (PL_compiling.cop_warnings == pWARN_ALL) {
723 /* Get the bit mask for $warnings::Bits{all}, because
724 * it could have been extended by warnings::register */
726 HV *bits=get_hv("warnings::Bits", FALSE);
727 if (bits && (bits_all=hv_fetch(bits, "all", 3, FALSE))) {
728 sv_setsv(sv, *bits_all);
731 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
735 sv_setsv(sv, PL_compiling.cop_warnings);
740 case '1': case '2': case '3': case '4':
741 case '5': case '6': case '7': case '8': case '9': case '&':
742 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
746 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
747 * XXX Does the new way break anything?
749 paren = atoi(mg->mg_ptr); /* $& is in [0] */
751 if (paren <= (I32)rx->nparens &&
752 (s1 = rx->startp[paren]) != -1 &&
753 (t1 = rx->endp[paren]) != -1)
763 if (RX_MATCH_UTF8(rx) && is_utf8_string((U8*)s, i))
768 if (RX_MATCH_TAINTED(rx)) {
769 MAGIC* mg = SvMAGIC(sv);
772 SvMAGIC_set(sv, mg->mg_moremagic);
774 if ((mgt = SvMAGIC(sv))) {
775 mg->mg_moremagic = mgt;
785 sv_setsv(sv,&PL_sv_undef);
788 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
789 paren = rx->lastparen;
793 sv_setsv(sv,&PL_sv_undef);
795 case '\016': /* ^N */
796 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
797 paren = rx->lastcloseparen;
801 sv_setsv(sv,&PL_sv_undef);
804 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
805 if ((s = rx->subbeg) && rx->startp[0] != -1) {
810 sv_setsv(sv,&PL_sv_undef);
813 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
814 if (rx->subbeg && rx->endp[0] != -1) {
815 s = rx->subbeg + rx->endp[0];
816 i = rx->sublen - rx->endp[0];
820 sv_setsv(sv,&PL_sv_undef);
823 if (GvIO(PL_last_in_gv)) {
824 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
829 sv_setiv(sv, (IV)STATUS_CURRENT);
830 #ifdef COMPLEX_STATUS
831 LvTARGOFF(sv) = PL_statusvalue;
832 LvTARGLEN(sv) = PL_statusvalue_vms;
837 if (GvIOp(PL_defoutgv))
838 s = IoTOP_NAME(GvIOp(PL_defoutgv));
842 sv_setpv(sv,GvENAME(PL_defoutgv));
847 if (GvIOp(PL_defoutgv))
848 s = IoFMT_NAME(GvIOp(PL_defoutgv));
850 s = GvENAME(PL_defoutgv);
854 if (GvIOp(PL_defoutgv))
855 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
858 if (GvIOp(PL_defoutgv))
859 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
862 if (GvIOp(PL_defoutgv))
863 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
870 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
873 if (GvIOp(PL_defoutgv))
874 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
880 sv_copypv(sv, PL_ors_sv);
883 sv_setpv(sv,PL_ofmt);
887 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
888 sv_setpv(sv, errno ? Strerror(errno) : "");
891 int saveerrno = errno;
892 sv_setnv(sv, (NV)errno);
894 if (errno == errno_isOS2 || errno == errno_isOS2_set)
895 sv_setpv(sv, os2error(Perl_rc));
898 sv_setpv(sv, errno ? Strerror(errno) : "");
902 SvNOK_on(sv); /* what a wonderful hack! */
905 sv_setiv(sv, (IV)PL_uid);
908 sv_setiv(sv, (IV)PL_euid);
911 sv_setiv(sv, (IV)PL_gid);
913 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, (long unsigned int)PL_gid);
917 sv_setiv(sv, (IV)PL_egid);
919 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, (long unsigned int)PL_egid);
924 Groups_t gary[NGROUPS];
925 I32 j = getgroups(NGROUPS,gary);
927 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, (long unsigned int)gary[j]);
930 (void)SvIOK_on(sv); /* what a wonderful hack! */
932 #ifndef MACOS_TRADITIONAL
941 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
943 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
945 if (uf && uf->uf_val)
946 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
951 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
959 ptr = MgPV_const(mg,klen);
962 #ifdef DYNAMIC_ENV_FETCH
963 /* We just undefd an environment var. Is a replacement */
964 /* waiting in the wings? */
967 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
968 s = SvPV(*valp, len);
972 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
973 /* And you'll never guess what the dog had */
974 /* in its mouth... */
976 MgTAINTEDDIR_off(mg);
978 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
979 char pathbuf[256], eltbuf[256], *cp, *elt = s;
983 do { /* DCL$PATH may be a search list */
984 while (1) { /* as may dev portion of any element */
985 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
986 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
987 cando_by_name(S_IWUSR,0,elt) ) {
992 if ((cp = strchr(elt, ':')) != Nullch)
994 if (my_trnlnm(elt, eltbuf, j++))
1000 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1003 if (s && klen == 4 && strEQ(ptr,"PATH")) {
1004 char *strend = s + len;
1006 while (s < strend) {
1010 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
1011 s, strend, ':', &i);
1013 if (i >= sizeof tmpbuf /* too long -- assume the worst */
1015 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
1016 MgTAINTEDDIR_on(mg);
1022 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1028 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
1031 my_setenv(MgPV_nolen_const(mg),Nullch);
1036 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1038 #if defined(VMS) || defined(EPOC) || defined(SYMBIAN)
1039 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1041 if (PL_localizing) {
1044 magic_clear_all_env(sv,mg);
1045 hv_iterinit((HV*)sv);
1046 while ((entry = hv_iternext((HV*)sv))) {
1048 my_setenv(hv_iterkey(entry, &keylen),
1049 SvPV(hv_iterval((HV*)sv, entry), n_a));
1057 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1061 #if defined(VMS) || defined(EPOC) || defined(SYMBIAN)
1062 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1064 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1067 # ifdef USE_ENVIRON_ARRAY
1068 # if defined(USE_ITHREADS)
1069 /* only the parent thread can clobber the process environment */
1070 if (PL_curinterp == aTHX)
1073 # ifndef PERL_USE_SAFE_PUTENV
1074 if (!PL_use_safe_putenv) {
1077 if (environ == PL_origenviron)
1078 environ = (char**)safesysmalloc(sizeof(char*));
1080 for (i = 0; environ[i]; i++)
1081 safesysfree(environ[i]);
1083 # endif /* PERL_USE_SAFE_PUTENV */
1085 environ[0] = Nullch;
1087 # endif /* USE_ENVIRON_ARRAY */
1088 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1089 #endif /* VMS || EPOC */
1090 #endif /* !PERL_MICRO */
1097 #ifdef HAS_SIGPROCMASK
1099 restore_sigmask(pTHX_ SV *save_sv)
1101 sigset_t *ossetp = (sigset_t *) SvPV_nolen( save_sv );
1102 (void)sigprocmask(SIG_SETMASK, ossetp, (sigset_t *)0);
1106 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1109 /* Are we fetching a signal entry? */
1110 i = whichsig(MgPV_nolen_const(mg));
1113 sv_setsv(sv,PL_psig_ptr[i]);
1115 Sighandler_t sigstate;
1116 sigstate = rsignal_state(i);
1117 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1118 if (PL_sig_handlers_initted && PL_sig_ignoring[i]) sigstate = SIG_IGN;
1120 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1121 if (PL_sig_handlers_initted && PL_sig_defaulting[i]) sigstate = SIG_DFL;
1123 /* cache state so we don't fetch it again */
1124 if(sigstate == SIG_IGN)
1125 sv_setpv(sv,"IGNORE");
1127 sv_setsv(sv,&PL_sv_undef);
1128 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1135 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1137 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1138 * refactoring might be in order.
1141 register const char *s = MgPV_nolen_const(mg);
1145 if (strEQ(s,"__DIE__"))
1147 else if (strEQ(s,"__WARN__"))
1150 Perl_croak(aTHX_ "No such hook: %s", s);
1154 SvREFCNT_dec(to_dec);
1159 /* Are we clearing a signal entry? */
1162 #ifdef HAS_SIGPROCMASK
1165 /* Avoid having the signal arrive at a bad time, if possible. */
1168 sigprocmask(SIG_BLOCK, &set, &save);
1170 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1171 SAVEFREESV(save_sv);
1172 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1175 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1176 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1178 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1179 PL_sig_defaulting[i] = 1;
1180 (void)rsignal(i, PL_csighandlerp);
1182 (void)rsignal(i, SIG_DFL);
1184 if(PL_psig_name[i]) {
1185 SvREFCNT_dec(PL_psig_name[i]);
1188 if(PL_psig_ptr[i]) {
1189 SV *to_dec=PL_psig_ptr[i];
1192 SvREFCNT_dec(to_dec);
1202 S_raise_signal(pTHX_ int sig)
1204 /* Set a flag to say this signal is pending */
1205 PL_psig_pend[sig]++;
1206 /* And one to say _a_ signal is pending */
1211 Perl_csighandler(int sig)
1213 #ifdef PERL_GET_SIG_CONTEXT
1214 dTHXa(PERL_GET_SIG_CONTEXT);
1218 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1219 (void) rsignal(sig, PL_csighandlerp);
1220 if (PL_sig_ignoring[sig]) return;
1222 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1223 if (PL_sig_defaulting[sig])
1224 #ifdef KILL_BY_SIGPRC
1225 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1230 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
1231 /* Call the perl level handler now--
1232 * with risk we may be in malloc() etc. */
1233 (*PL_sighandlerp)(sig);
1235 S_raise_signal(aTHX_ sig);
1238 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1240 Perl_csighandler_init(void)
1243 if (PL_sig_handlers_initted) return;
1245 for (sig = 1; sig < SIG_SIZE; sig++) {
1246 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1248 PL_sig_defaulting[sig] = 1;
1249 (void) rsignal(sig, PL_csighandlerp);
1251 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1252 PL_sig_ignoring[sig] = 0;
1255 PL_sig_handlers_initted = 1;
1260 Perl_despatch_signals(pTHX)
1264 for (sig = 1; sig < SIG_SIZE; sig++) {
1265 if (PL_psig_pend[sig]) {
1266 PERL_BLOCKSIG_ADD(set, sig);
1267 PL_psig_pend[sig] = 0;
1268 PERL_BLOCKSIG_BLOCK(set);
1269 (*PL_sighandlerp)(sig);
1270 PERL_BLOCKSIG_UNBLOCK(set);
1276 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1281 /* Need to be careful with SvREFCNT_dec(), because that can have side
1282 * effects (due to closures). We must make sure that the new disposition
1283 * is in place before it is called.
1287 #ifdef HAS_SIGPROCMASK
1292 register const char *s = MgPV(mg,len);
1294 if (strEQ(s,"__DIE__"))
1296 else if (strEQ(s,"__WARN__"))
1299 Perl_croak(aTHX_ "No such hook: %s", s);
1307 i = whichsig(s); /* ...no, a brick */
1309 if (ckWARN(WARN_SIGNAL))
1310 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1313 #ifdef HAS_SIGPROCMASK
1314 /* Avoid having the signal arrive at a bad time, if possible. */
1317 sigprocmask(SIG_BLOCK, &set, &save);
1319 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1320 SAVEFREESV(save_sv);
1321 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1324 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1325 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1327 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1328 PL_sig_ignoring[i] = 0;
1330 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1331 PL_sig_defaulting[i] = 0;
1333 SvREFCNT_dec(PL_psig_name[i]);
1334 to_dec = PL_psig_ptr[i];
1335 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1336 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1337 PL_psig_name[i] = newSVpvn(s, len);
1338 SvREADONLY_on(PL_psig_name[i]);
1340 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1342 (void)rsignal(i, PL_csighandlerp);
1343 #ifdef HAS_SIGPROCMASK
1348 *svp = SvREFCNT_inc(sv);
1350 SvREFCNT_dec(to_dec);
1353 s = SvPV_force(sv,len);
1354 if (strEQ(s,"IGNORE")) {
1356 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1357 PL_sig_ignoring[i] = 1;
1358 (void)rsignal(i, PL_csighandlerp);
1360 (void)rsignal(i, SIG_IGN);
1364 else if (strEQ(s,"DEFAULT") || !*s) {
1366 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1368 PL_sig_defaulting[i] = 1;
1369 (void)rsignal(i, PL_csighandlerp);
1372 (void)rsignal(i, SIG_DFL);
1377 * We should warn if HINT_STRICT_REFS, but without
1378 * access to a known hint bit in a known OP, we can't
1379 * tell whether HINT_STRICT_REFS is in force or not.
1381 if (!strchr(s,':') && !strchr(s,'\''))
1382 sv_insert(sv, 0, 0, "main::", 6);
1384 (void)rsignal(i, PL_csighandlerp);
1386 *svp = SvREFCNT_inc(sv);
1388 #ifdef HAS_SIGPROCMASK
1393 SvREFCNT_dec(to_dec);
1396 #endif /* !PERL_MICRO */
1399 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1403 PL_sub_generation++;
1408 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1412 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1413 PL_amagic_generation++;
1419 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1421 HV * const hv = (HV*)LvTARG(sv);
1426 (void) hv_iterinit(hv);
1427 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1430 while (hv_iternext(hv))
1435 sv_setiv(sv, (IV)i);
1440 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1444 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1449 /* caller is responsible for stack switching/cleanup */
1451 S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
1457 PUSHs(SvTIED_obj(sv, mg));
1460 if (mg->mg_len >= 0)
1461 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1462 else if (mg->mg_len == HEf_SVKEY)
1463 PUSHs((SV*)mg->mg_ptr);
1465 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1466 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1474 return call_method(meth, flags);
1478 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
1484 PUSHSTACKi(PERLSI_MAGIC);
1486 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1487 sv_setsv(sv, *PL_stack_sp--);
1497 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1500 mg->mg_flags |= MGf_GSKIP;
1501 magic_methpack(sv,mg,"FETCH");
1506 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1510 PUSHSTACKi(PERLSI_MAGIC);
1511 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1518 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1520 return magic_methpack(sv,mg,"DELETE");
1525 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1532 PUSHSTACKi(PERLSI_MAGIC);
1533 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1534 sv = *PL_stack_sp--;
1535 retval = (U32) SvIV(sv)-1;
1544 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1549 PUSHSTACKi(PERLSI_MAGIC);
1551 XPUSHs(SvTIED_obj(sv, mg));
1553 call_method("CLEAR", G_SCALAR|G_DISCARD);
1561 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1564 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1568 PUSHSTACKi(PERLSI_MAGIC);
1571 PUSHs(SvTIED_obj(sv, mg));
1576 if (call_method(meth, G_SCALAR))
1577 sv_setsv(key, *PL_stack_sp--);
1586 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1588 return magic_methpack(sv,mg,"EXISTS");
1592 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1595 SV *retval = &PL_sv_undef;
1596 SV *tied = SvTIED_obj((SV*)hv, mg);
1597 HV *pkg = SvSTASH((SV*)SvRV(tied));
1599 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1601 if (HvEITER_get(hv))
1602 /* we are in an iteration so the hash cannot be empty */
1604 /* no xhv_eiter so now use FIRSTKEY */
1605 key = sv_newmortal();
1606 magic_nextpack((SV*)hv, mg, key);
1607 HvEITER_set(hv, NULL); /* need to reset iterator */
1608 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1611 /* there is a SCALAR method that we can call */
1613 PUSHSTACKi(PERLSI_MAGIC);
1619 if (call_method("SCALAR", G_SCALAR))
1620 retval = *PL_stack_sp--;
1627 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1636 svp = av_fetch(GvAV(gv),
1637 atoi(MgPV_nolen_const(mg)), FALSE);
1638 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp)))) {
1639 /* set or clear breakpoint in the relevant control op */
1641 o->op_flags |= OPf_SPECIAL;
1643 o->op_flags &= ~OPf_SPECIAL;
1649 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1651 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1656 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1658 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1663 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1665 SV* lsv = LvTARG(sv);
1667 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1668 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1669 if (mg && mg->mg_len >= 0) {
1672 sv_pos_b2u(lsv, &i);
1673 sv_setiv(sv, i + PL_curcop->cop_arybase);
1682 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1684 SV* lsv = LvTARG(sv);
1691 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1692 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1696 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1697 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1699 else if (!SvOK(sv)) {
1703 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1705 pos = SvIV(sv) - PL_curcop->cop_arybase;
1708 ulen = sv_len_utf8(lsv);
1718 else if (pos > (SSize_t)len)
1723 sv_pos_u2b(lsv, &p, 0);
1728 mg->mg_flags &= ~MGf_MINMATCH;
1734 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1737 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1739 gv_efullname3(sv,((GV*)sv), "*");
1743 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1748 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1755 gv = gv_fetchsv(sv,TRUE, SVt_PVGV);
1760 GvGP(sv) = gp_ref(GvGP(gv));
1765 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1768 SV * const lsv = LvTARG(sv);
1769 const char * const tmps = SvPV(lsv,len);
1770 I32 offs = LvTARGOFF(sv);
1771 I32 rem = LvTARGLEN(sv);
1775 sv_pos_u2b(lsv, &offs, &rem);
1776 if (offs > (I32)len)
1778 if (rem + offs > (I32)len)
1780 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1787 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1790 char *tmps = SvPV(sv, len);
1791 SV * const lsv = LvTARG(sv);
1792 I32 lvoff = LvTARGOFF(sv);
1793 I32 lvlen = LvTARGLEN(sv);
1797 sv_utf8_upgrade(lsv);
1798 sv_pos_u2b(lsv, &lvoff, &lvlen);
1799 sv_insert(lsv, lvoff, lvlen, tmps, len);
1800 LvTARGLEN(sv) = sv_len_utf8(sv);
1803 else if (lsv && SvUTF8(lsv)) {
1804 sv_pos_u2b(lsv, &lvoff, &lvlen);
1805 LvTARGLEN(sv) = len;
1806 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1807 sv_insert(lsv, lvoff, lvlen, tmps, len);
1811 sv_insert(lsv, lvoff, lvlen, tmps, len);
1812 LvTARGLEN(sv) = len;
1820 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1822 TAINT_IF((mg->mg_len & 1) ||
1823 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1828 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1831 if (PL_localizing) {
1832 if (PL_localizing == 1)
1837 else if (PL_tainted)
1845 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1847 SV * const lsv = LvTARG(sv);
1855 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1860 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1863 do_vecset(sv); /* XXX slurp this routine */
1868 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1871 if (LvTARGLEN(sv)) {
1873 SV *ahv = LvTARG(sv);
1874 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1879 AV* av = (AV*)LvTARG(sv);
1880 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1881 targ = AvARRAY(av)[LvTARGOFF(sv)];
1883 if (targ && targ != &PL_sv_undef) {
1884 /* somebody else defined it for us */
1885 SvREFCNT_dec(LvTARG(sv));
1886 LvTARG(sv) = SvREFCNT_inc(targ);
1888 SvREFCNT_dec(mg->mg_obj);
1889 mg->mg_obj = Nullsv;
1890 mg->mg_flags &= ~MGf_REFCOUNTED;
1895 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1900 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1906 sv_setsv(LvTARG(sv), sv);
1907 SvSETMAGIC(LvTARG(sv));
1913 Perl_vivify_defelem(pTHX_ SV *sv)
1918 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1921 SV *ahv = LvTARG(sv);
1922 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1925 if (!value || value == &PL_sv_undef)
1926 Perl_croak(aTHX_ PL_no_helem_sv, mg->mg_obj);
1929 AV* av = (AV*)LvTARG(sv);
1930 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1931 LvTARG(sv) = Nullsv; /* array can't be extended */
1933 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1934 if (!svp || (value = *svp) == &PL_sv_undef)
1935 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1938 (void)SvREFCNT_inc(value);
1939 SvREFCNT_dec(LvTARG(sv));
1942 SvREFCNT_dec(mg->mg_obj);
1943 mg->mg_obj = Nullsv;
1944 mg->mg_flags &= ~MGf_REFCOUNTED;
1948 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1950 AV *av = (AV*)mg->mg_obj;
1951 SV **svp = AvARRAY(av);
1952 I32 i = AvFILLp(av);
1957 if (!SvWEAKREF(svp[i]))
1958 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1959 /* XXX Should we check that it hasn't changed? */
1960 SvRV_set(svp[i], 0);
1962 SvWEAKREF_off(svp[i]);
1967 SvREFCNT_dec(av); /* remove extra count added by sv_add_backref() */
1972 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1980 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1983 sv_unmagic(sv, PERL_MAGIC_bm);
1989 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1992 sv_unmagic(sv, PERL_MAGIC_fm);
1998 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2000 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2002 if (uf && uf->uf_set)
2003 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2008 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2011 sv_unmagic(sv, PERL_MAGIC_qr);
2016 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
2018 regexp *re = (regexp *)mg->mg_obj;
2024 #ifdef USE_LOCALE_COLLATE
2026 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2029 * RenE<eacute> Descartes said "I think not."
2030 * and vanished with a faint plop.
2034 Safefree(mg->mg_ptr);
2040 #endif /* USE_LOCALE_COLLATE */
2042 /* Just clear the UTF-8 cache data. */
2044 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2047 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2049 mg->mg_len = -1; /* The mg_len holds the len cache. */
2054 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2056 register const char *s;
2059 switch (*mg->mg_ptr) {
2060 case '\001': /* ^A */
2061 sv_setsv(PL_bodytarget, sv);
2063 case '\003': /* ^C */
2064 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2067 case '\004': /* ^D */
2070 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2071 DEBUG_x(dump_all());
2073 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
2076 case '\005': /* ^E */
2077 if (*(mg->mg_ptr+1) == '\0') {
2078 #ifdef MACOS_TRADITIONAL
2079 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2082 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2085 SetLastError( SvIV(sv) );
2088 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2090 /* will anyone ever use this? */
2091 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
2097 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2099 SvREFCNT_dec(PL_encoding);
2100 if (SvOK(sv) || SvGMAGICAL(sv)) {
2101 PL_encoding = newSVsv(sv);
2104 PL_encoding = Nullsv;
2108 case '\006': /* ^F */
2109 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2111 case '\010': /* ^H */
2112 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2114 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2116 Safefree(PL_inplace);
2118 PL_inplace = savesvpv(sv);
2120 PL_inplace = Nullch;
2122 case '\017': /* ^O */
2123 if (*(mg->mg_ptr+1) == '\0') {
2125 Safefree(PL_osname);
2129 TAINT_PROPER("assigning to $^O");
2130 PL_osname = savesvpv(sv);
2133 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2134 if (!PL_compiling.cop_io)
2135 PL_compiling.cop_io = newSVsv(sv);
2137 sv_setsv(PL_compiling.cop_io,sv);
2140 case '\020': /* ^P */
2141 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2142 if (PL_perldb && !PL_DBsingle)
2145 case '\024': /* ^T */
2147 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2149 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2152 case '\027': /* ^W & $^WARNING_BITS */
2153 if (*(mg->mg_ptr+1) == '\0') {
2154 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2155 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2156 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2157 | (i ? G_WARN_ON : G_WARN_OFF) ;
2160 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2161 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2162 if (!SvPOK(sv) && PL_localizing) {
2163 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2164 PL_compiling.cop_warnings = pWARN_NONE;
2169 int accumulate = 0 ;
2170 int any_fatals = 0 ;
2171 const char * const ptr = (char*)SvPV(sv, len) ;
2172 for (i = 0 ; i < len ; ++i) {
2173 accumulate |= ptr[i] ;
2174 any_fatals |= (ptr[i] & 0xAA) ;
2177 PL_compiling.cop_warnings = pWARN_NONE;
2178 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
2179 PL_compiling.cop_warnings = pWARN_ALL;
2180 PL_dowarn |= G_WARN_ONCE ;
2183 if (specialWARN(PL_compiling.cop_warnings))
2184 PL_compiling.cop_warnings = newSVsv(sv) ;
2186 sv_setsv(PL_compiling.cop_warnings, sv);
2187 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2188 PL_dowarn |= G_WARN_ONCE ;
2196 if (PL_localizing) {
2197 if (PL_localizing == 1)
2198 SAVESPTR(PL_last_in_gv);
2200 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2201 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2204 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2205 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2206 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv,TRUE, SVt_PVIO);
2209 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2210 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2211 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv,TRUE, SVt_PVIO);
2214 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2217 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2218 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2219 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2222 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2226 IO *io = GvIOp(PL_defoutgv);
2229 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2230 IoFLAGS(io) &= ~IOf_FLUSH;
2232 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2233 PerlIO *ofp = IoOFP(io);
2235 (void)PerlIO_flush(ofp);
2236 IoFLAGS(io) |= IOf_FLUSH;
2242 SvREFCNT_dec(PL_rs);
2243 PL_rs = newSVsv(sv);
2247 SvREFCNT_dec(PL_ors_sv);
2248 if (SvOK(sv) || SvGMAGICAL(sv)) {
2249 PL_ors_sv = newSVsv(sv);
2257 SvREFCNT_dec(PL_ofs_sv);
2258 if (SvOK(sv) || SvGMAGICAL(sv)) {
2259 PL_ofs_sv = newSVsv(sv);
2268 PL_ofmt = savesvpv(sv);
2271 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2274 #ifdef COMPLEX_STATUS
2275 if (PL_localizing == 2) {
2276 PL_statusvalue = LvTARGOFF(sv);
2277 PL_statusvalue_vms = LvTARGLEN(sv);
2281 #ifdef VMSISH_STATUS
2283 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2286 STATUS_UNIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2291 # define PERL_VMS_BANG vaxc$errno
2293 # define PERL_VMS_BANG 0
2295 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2296 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2300 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2301 if (PL_delaymagic) {
2302 PL_delaymagic |= DM_RUID;
2303 break; /* don't do magic till later */
2306 (void)setruid((Uid_t)PL_uid);
2309 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2311 #ifdef HAS_SETRESUID
2312 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2314 if (PL_uid == PL_euid) { /* special case $< = $> */
2316 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2317 if (PL_uid != 0 && PerlProc_getuid() == 0)
2318 (void)PerlProc_setuid(0);
2320 (void)PerlProc_setuid(PL_uid);
2322 PL_uid = PerlProc_getuid();
2323 Perl_croak(aTHX_ "setruid() not implemented");
2328 PL_uid = PerlProc_getuid();
2329 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2332 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2333 if (PL_delaymagic) {
2334 PL_delaymagic |= DM_EUID;
2335 break; /* don't do magic till later */
2338 (void)seteuid((Uid_t)PL_euid);
2341 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2343 #ifdef HAS_SETRESUID
2344 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2346 if (PL_euid == PL_uid) /* special case $> = $< */
2347 PerlProc_setuid(PL_euid);
2349 PL_euid = PerlProc_geteuid();
2350 Perl_croak(aTHX_ "seteuid() not implemented");
2355 PL_euid = PerlProc_geteuid();
2356 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2359 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2360 if (PL_delaymagic) {
2361 PL_delaymagic |= DM_RGID;
2362 break; /* don't do magic till later */
2365 (void)setrgid((Gid_t)PL_gid);
2368 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2370 #ifdef HAS_SETRESGID
2371 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2373 if (PL_gid == PL_egid) /* special case $( = $) */
2374 (void)PerlProc_setgid(PL_gid);
2376 PL_gid = PerlProc_getgid();
2377 Perl_croak(aTHX_ "setrgid() not implemented");
2382 PL_gid = PerlProc_getgid();
2383 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2386 #ifdef HAS_SETGROUPS
2388 const char *p = SvPV(sv, len);
2389 Groups_t gary[NGROUPS];
2394 for (i = 0; i < NGROUPS; ++i) {
2395 while (*p && !isSPACE(*p))
2404 (void)setgroups(i, gary);
2406 #else /* HAS_SETGROUPS */
2407 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2408 #endif /* HAS_SETGROUPS */
2409 if (PL_delaymagic) {
2410 PL_delaymagic |= DM_EGID;
2411 break; /* don't do magic till later */
2414 (void)setegid((Gid_t)PL_egid);
2417 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2419 #ifdef HAS_SETRESGID
2420 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2422 if (PL_egid == PL_gid) /* special case $) = $( */
2423 (void)PerlProc_setgid(PL_egid);
2425 PL_egid = PerlProc_getegid();
2426 Perl_croak(aTHX_ "setegid() not implemented");
2431 PL_egid = PerlProc_getegid();
2432 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2435 PL_chopset = SvPV_force(sv,len);
2437 #ifndef MACOS_TRADITIONAL
2439 LOCK_DOLLARZERO_MUTEX;
2440 #ifdef HAS_SETPROCTITLE
2441 /* The BSDs don't show the argv[] in ps(1) output, they
2442 * show a string from the process struct and provide
2443 * the setproctitle() routine to manipulate that. */
2446 # if __FreeBSD_version > 410001
2447 /* The leading "-" removes the "perl: " prefix,
2448 * but not the "(perl) suffix from the ps(1)
2449 * output, because that's what ps(1) shows if the
2450 * argv[] is modified. */
2451 setproctitle("-%s", s);
2452 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2453 /* This doesn't really work if you assume that
2454 * $0 = 'foobar'; will wipe out 'perl' from the $0
2455 * because in ps(1) output the result will be like
2456 * sprintf("perl: %s (perl)", s)
2457 * I guess this is a security feature:
2458 * one (a user process) cannot get rid of the original name.
2460 setproctitle("%s", s);
2464 #if defined(__hpux) && defined(PSTAT_SETCMD)
2468 un.pst_command = (char *)s;
2469 pstat(PSTAT_SETCMD, un, len, 0, 0);
2472 /* PL_origalen is set in perl_parse(). */
2473 s = SvPV_force(sv,len);
2474 if (len >= (STRLEN)PL_origalen-1) {
2475 /* Longer than original, will be truncated. We assume that
2476 * PL_origalen bytes are available. */
2477 Copy(s, PL_origargv[0], PL_origalen-1, char);
2480 /* Shorter than original, will be padded. */
2481 Copy(s, PL_origargv[0], len, char);
2482 PL_origargv[0][len] = 0;
2483 memset(PL_origargv[0] + len + 1,
2484 /* Is the space counterintuitive? Yes.
2485 * (You were expecting \0?)
2486 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2489 PL_origalen - len - 1);
2491 PL_origargv[0][PL_origalen-1] = 0;
2492 for (i = 1; i < PL_origargc; i++)
2494 UNLOCK_DOLLARZERO_MUTEX;
2502 Perl_whichsig(pTHX_ const char *sig)
2504 register char* const* sigv;
2506 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
2507 if (strEQ(sig,*sigv))
2508 return PL_sig_num[sigv - (char* const*)PL_sig_name];
2510 if (strEQ(sig,"CHLD"))
2514 if (strEQ(sig,"CLD"))
2521 Perl_sighandler(int sig)
2523 #ifdef PERL_GET_SIG_CONTEXT
2524 dTHXa(PERL_GET_SIG_CONTEXT);
2531 SV *sv = Nullsv, *tSv = PL_Sv;
2537 if (PL_savestack_ix + 15 <= PL_savestack_max)
2539 if (PL_markstack_ptr < PL_markstack_max - 2)
2541 if (PL_scopestack_ix < PL_scopestack_max - 3)
2544 if (!PL_psig_ptr[sig]) {
2545 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2550 /* Max number of items pushed there is 3*n or 4. We cannot fix
2551 infinity, so we fix 4 (in fact 5): */
2553 PL_savestack_ix += 5; /* Protect save in progress. */
2554 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2557 PL_markstack_ptr++; /* Protect mark. */
2559 PL_scopestack_ix += 1;
2560 /* sv_2cv is too complicated, try a simpler variant first: */
2561 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2562 || SvTYPE(cv) != SVt_PVCV)
2563 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2565 if (!cv || !CvROOT(cv)) {
2566 if (ckWARN(WARN_SIGNAL))
2567 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2568 PL_sig_name[sig], (gv ? GvENAME(gv)
2575 if(PL_psig_name[sig]) {
2576 sv = SvREFCNT_inc(PL_psig_name[sig]);
2578 #if !defined(PERL_IMPLICIT_CONTEXT)
2582 sv = sv_newmortal();
2583 sv_setpv(sv,PL_sig_name[sig]);
2586 PUSHSTACKi(PERLSI_SIGNAL);
2591 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2594 if (SvTRUE(ERRSV)) {
2596 #ifdef HAS_SIGPROCMASK
2597 /* Handler "died", for example to get out of a restart-able read().
2598 * Before we re-do that on its behalf re-enable the signal which was
2599 * blocked by the system when we entered.
2603 sigaddset(&set,sig);
2604 sigprocmask(SIG_UNBLOCK, &set, NULL);
2606 /* Not clear if this will work */
2607 (void)rsignal(sig, SIG_IGN);
2608 (void)rsignal(sig, PL_csighandlerp);
2610 #endif /* !PERL_MICRO */
2615 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2619 PL_scopestack_ix -= 1;
2622 PL_op = myop; /* Apparently not needed... */
2624 PL_Sv = tSv; /* Restore global temporaries. */
2631 restore_magic(pTHX_ const void *p)
2633 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2634 SV* sv = mgs->mgs_sv;
2639 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2641 #ifdef PERL_OLD_COPY_ON_WRITE
2642 /* While magic was saved (and off) sv_setsv may well have seen
2643 this SV as a prime candidate for COW. */
2645 sv_force_normal(sv);
2649 SvFLAGS(sv) |= mgs->mgs_flags;
2653 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2656 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2658 /* If we're still on top of the stack, pop us off. (That condition
2659 * will be satisfied if restore_magic was called explicitly, but *not*
2660 * if it's being called via leave_scope.)
2661 * The reason for doing this is that otherwise, things like sv_2cv()
2662 * may leave alloc gunk on the savestack, and some code
2663 * (e.g. sighandler) doesn't expect that...
2665 if (PL_savestack_ix == mgs->mgs_ss_ix)
2667 I32 popval = SSPOPINT;
2668 assert(popval == SAVEt_DESTRUCTOR_X);
2669 PL_savestack_ix -= 2;
2671 assert(popval == SAVEt_ALLOC);
2673 PL_savestack_ix -= popval;
2679 unwind_handler_stack(pTHX_ const void *p)
2682 const U32 flags = *(const U32*)p;
2685 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2686 /* cxstack_ix-- Not needed, die already unwound it. */
2687 #if !defined(PERL_IMPLICIT_CONTEXT)
2689 SvREFCNT_dec(PL_sig_sv);
2695 * c-indentation-style: bsd
2697 * indent-tabs-mode: t
2700 * ex: set ts=8 sts=4 sw=4 noet: