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)
1032 my_setenv(MgPV(mg,n_a),Nullch);
1037 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1039 #if defined(VMS) || defined(EPOC) || defined(SYMBIAN)
1040 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1042 if (PL_localizing) {
1045 magic_clear_all_env(sv,mg);
1046 hv_iterinit((HV*)sv);
1047 while ((entry = hv_iternext((HV*)sv))) {
1049 my_setenv(hv_iterkey(entry, &keylen),
1050 SvPV(hv_iterval((HV*)sv, entry), n_a));
1058 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1062 #if defined(VMS) || defined(EPOC) || defined(SYMBIAN)
1063 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1065 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
1068 # ifdef USE_ENVIRON_ARRAY
1069 # if defined(USE_ITHREADS)
1070 /* only the parent thread can clobber the process environment */
1071 if (PL_curinterp == aTHX)
1074 # ifndef PERL_USE_SAFE_PUTENV
1075 if (!PL_use_safe_putenv) {
1078 if (environ == PL_origenviron)
1079 environ = (char**)safesysmalloc(sizeof(char*));
1081 for (i = 0; environ[i]; i++)
1082 safesysfree(environ[i]);
1084 # endif /* PERL_USE_SAFE_PUTENV */
1086 environ[0] = Nullch;
1088 # endif /* USE_ENVIRON_ARRAY */
1089 # endif /* PERL_IMPLICIT_SYS || WIN32 */
1090 #endif /* VMS || EPOC */
1091 #endif /* !PERL_MICRO */
1098 #ifdef HAS_SIGPROCMASK
1100 restore_sigmask(pTHX_ SV *save_sv)
1102 sigset_t *ossetp = (sigset_t *) SvPV_nolen( save_sv );
1103 (void)sigprocmask(SIG_SETMASK, ossetp, (sigset_t *)0);
1107 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1111 /* Are we fetching a signal entry? */
1112 i = whichsig(MgPV(mg,n_a));
1115 sv_setsv(sv,PL_psig_ptr[i]);
1117 Sighandler_t sigstate;
1118 sigstate = rsignal_state(i);
1119 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1120 if (PL_sig_handlers_initted && PL_sig_ignoring[i]) sigstate = SIG_IGN;
1122 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1123 if (PL_sig_handlers_initted && PL_sig_defaulting[i]) sigstate = SIG_DFL;
1125 /* cache state so we don't fetch it again */
1126 if(sigstate == SIG_IGN)
1127 sv_setpv(sv,"IGNORE");
1129 sv_setsv(sv,&PL_sv_undef);
1130 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1137 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1139 /* XXX Some of this code was copied from Perl_magic_setsig. A little
1140 * refactoring might be in order.
1144 register const char *s = MgPV(mg,n_a);
1148 if (strEQ(s,"__DIE__"))
1150 else if (strEQ(s,"__WARN__"))
1153 Perl_croak(aTHX_ "No such hook: %s", s);
1157 SvREFCNT_dec(to_dec);
1162 /* Are we clearing a signal entry? */
1165 #ifdef HAS_SIGPROCMASK
1168 /* Avoid having the signal arrive at a bad time, if possible. */
1171 sigprocmask(SIG_BLOCK, &set, &save);
1173 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1174 SAVEFREESV(save_sv);
1175 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1178 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1179 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1181 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1182 PL_sig_defaulting[i] = 1;
1183 (void)rsignal(i, PL_csighandlerp);
1185 (void)rsignal(i, SIG_DFL);
1187 if(PL_psig_name[i]) {
1188 SvREFCNT_dec(PL_psig_name[i]);
1191 if(PL_psig_ptr[i]) {
1192 SV *to_dec=PL_psig_ptr[i];
1195 SvREFCNT_dec(to_dec);
1205 S_raise_signal(pTHX_ int sig)
1207 /* Set a flag to say this signal is pending */
1208 PL_psig_pend[sig]++;
1209 /* And one to say _a_ signal is pending */
1214 Perl_csighandler(int sig)
1216 #ifdef PERL_GET_SIG_CONTEXT
1217 dTHXa(PERL_GET_SIG_CONTEXT);
1221 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1222 (void) rsignal(sig, PL_csighandlerp);
1223 if (PL_sig_ignoring[sig]) return;
1225 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1226 if (PL_sig_defaulting[sig])
1227 #ifdef KILL_BY_SIGPRC
1228 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1233 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
1234 /* Call the perl level handler now--
1235 * with risk we may be in malloc() etc. */
1236 (*PL_sighandlerp)(sig);
1238 S_raise_signal(aTHX_ sig);
1241 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1243 Perl_csighandler_init(void)
1246 if (PL_sig_handlers_initted) return;
1248 for (sig = 1; sig < SIG_SIZE; sig++) {
1249 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1251 PL_sig_defaulting[sig] = 1;
1252 (void) rsignal(sig, PL_csighandlerp);
1254 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1255 PL_sig_ignoring[sig] = 0;
1258 PL_sig_handlers_initted = 1;
1263 Perl_despatch_signals(pTHX)
1267 for (sig = 1; sig < SIG_SIZE; sig++) {
1268 if (PL_psig_pend[sig]) {
1269 PERL_BLOCKSIG_ADD(set, sig);
1270 PL_psig_pend[sig] = 0;
1271 PERL_BLOCKSIG_BLOCK(set);
1272 (*PL_sighandlerp)(sig);
1273 PERL_BLOCKSIG_UNBLOCK(set);
1279 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1284 /* Need to be careful with SvREFCNT_dec(), because that can have side
1285 * effects (due to closures). We must make sure that the new disposition
1286 * is in place before it is called.
1290 #ifdef HAS_SIGPROCMASK
1295 register const char *s = MgPV(mg,len);
1297 if (strEQ(s,"__DIE__"))
1299 else if (strEQ(s,"__WARN__"))
1302 Perl_croak(aTHX_ "No such hook: %s", s);
1310 i = whichsig(s); /* ...no, a brick */
1312 if (ckWARN(WARN_SIGNAL))
1313 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
1316 #ifdef HAS_SIGPROCMASK
1317 /* Avoid having the signal arrive at a bad time, if possible. */
1320 sigprocmask(SIG_BLOCK, &set, &save);
1322 save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
1323 SAVEFREESV(save_sv);
1324 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1327 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1328 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1330 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1331 PL_sig_ignoring[i] = 0;
1333 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1334 PL_sig_defaulting[i] = 0;
1336 SvREFCNT_dec(PL_psig_name[i]);
1337 to_dec = PL_psig_ptr[i];
1338 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1339 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1340 PL_psig_name[i] = newSVpvn(s, len);
1341 SvREADONLY_on(PL_psig_name[i]);
1343 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1345 (void)rsignal(i, PL_csighandlerp);
1346 #ifdef HAS_SIGPROCMASK
1351 *svp = SvREFCNT_inc(sv);
1353 SvREFCNT_dec(to_dec);
1356 s = SvPV_force(sv,len);
1357 if (strEQ(s,"IGNORE")) {
1359 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1360 PL_sig_ignoring[i] = 1;
1361 (void)rsignal(i, PL_csighandlerp);
1363 (void)rsignal(i, SIG_IGN);
1367 else if (strEQ(s,"DEFAULT") || !*s) {
1369 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1371 PL_sig_defaulting[i] = 1;
1372 (void)rsignal(i, PL_csighandlerp);
1375 (void)rsignal(i, SIG_DFL);
1380 * We should warn if HINT_STRICT_REFS, but without
1381 * access to a known hint bit in a known OP, we can't
1382 * tell whether HINT_STRICT_REFS is in force or not.
1384 if (!strchr(s,':') && !strchr(s,'\''))
1385 sv_insert(sv, 0, 0, "main::", 6);
1387 (void)rsignal(i, PL_csighandlerp);
1389 *svp = SvREFCNT_inc(sv);
1391 #ifdef HAS_SIGPROCMASK
1396 SvREFCNT_dec(to_dec);
1399 #endif /* !PERL_MICRO */
1402 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1406 PL_sub_generation++;
1411 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1415 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1416 PL_amagic_generation++;
1422 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1424 HV * const hv = (HV*)LvTARG(sv);
1429 (void) hv_iterinit(hv);
1430 if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1433 while (hv_iternext(hv))
1438 sv_setiv(sv, (IV)i);
1443 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1447 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1452 /* caller is responsible for stack switching/cleanup */
1454 S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
1460 PUSHs(SvTIED_obj(sv, mg));
1463 if (mg->mg_len >= 0)
1464 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1465 else if (mg->mg_len == HEf_SVKEY)
1466 PUSHs((SV*)mg->mg_ptr);
1468 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1469 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1477 return call_method(meth, flags);
1481 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
1487 PUSHSTACKi(PERLSI_MAGIC);
1489 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1490 sv_setsv(sv, *PL_stack_sp--);
1500 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1503 mg->mg_flags |= MGf_GSKIP;
1504 magic_methpack(sv,mg,"FETCH");
1509 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1513 PUSHSTACKi(PERLSI_MAGIC);
1514 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1521 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1523 return magic_methpack(sv,mg,"DELETE");
1528 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1535 PUSHSTACKi(PERLSI_MAGIC);
1536 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1537 sv = *PL_stack_sp--;
1538 retval = (U32) SvIV(sv)-1;
1547 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1552 PUSHSTACKi(PERLSI_MAGIC);
1554 XPUSHs(SvTIED_obj(sv, mg));
1556 call_method("CLEAR", G_SCALAR|G_DISCARD);
1564 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1567 const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1571 PUSHSTACKi(PERLSI_MAGIC);
1574 PUSHs(SvTIED_obj(sv, mg));
1579 if (call_method(meth, G_SCALAR))
1580 sv_setsv(key, *PL_stack_sp--);
1589 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1591 return magic_methpack(sv,mg,"EXISTS");
1595 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1598 SV *retval = &PL_sv_undef;
1599 SV *tied = SvTIED_obj((SV*)hv, mg);
1600 HV *pkg = SvSTASH((SV*)SvRV(tied));
1602 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1604 if (HvEITER_get(hv))
1605 /* we are in an iteration so the hash cannot be empty */
1607 /* no xhv_eiter so now use FIRSTKEY */
1608 key = sv_newmortal();
1609 magic_nextpack((SV*)hv, mg, key);
1610 HvEITER_set(hv, NULL); /* need to reset iterator */
1611 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1614 /* there is a SCALAR method that we can call */
1616 PUSHSTACKi(PERLSI_MAGIC);
1622 if (call_method("SCALAR", G_SCALAR))
1623 retval = *PL_stack_sp--;
1630 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1640 svp = av_fetch(GvAV(gv),
1641 atoi(MgPV(mg,n_a)), FALSE);
1642 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp)))) {
1643 /* set or clear breakpoint in the relevant control op */
1645 o->op_flags |= OPf_SPECIAL;
1647 o->op_flags &= ~OPf_SPECIAL;
1653 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1655 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1660 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1662 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1667 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1669 SV* lsv = LvTARG(sv);
1671 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1672 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1673 if (mg && mg->mg_len >= 0) {
1676 sv_pos_b2u(lsv, &i);
1677 sv_setiv(sv, i + PL_curcop->cop_arybase);
1686 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1688 SV* lsv = LvTARG(sv);
1695 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1696 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1700 sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1701 mg = mg_find(lsv, PERL_MAGIC_regex_global);
1703 else if (!SvOK(sv)) {
1707 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1709 pos = SvIV(sv) - PL_curcop->cop_arybase;
1712 ulen = sv_len_utf8(lsv);
1722 else if (pos > (SSize_t)len)
1727 sv_pos_u2b(lsv, &p, 0);
1732 mg->mg_flags &= ~MGf_MINMATCH;
1738 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1741 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1743 gv_efullname3(sv,((GV*)sv), "*");
1747 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1752 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1759 gv = gv_fetchsv(sv,TRUE, SVt_PVGV);
1764 GvGP(sv) = gp_ref(GvGP(gv));
1769 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1772 SV * const lsv = LvTARG(sv);
1773 const char * const tmps = SvPV(lsv,len);
1774 I32 offs = LvTARGOFF(sv);
1775 I32 rem = LvTARGLEN(sv);
1779 sv_pos_u2b(lsv, &offs, &rem);
1780 if (offs > (I32)len)
1782 if (rem + offs > (I32)len)
1784 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1791 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1794 char *tmps = SvPV(sv, len);
1795 SV * const lsv = LvTARG(sv);
1796 I32 lvoff = LvTARGOFF(sv);
1797 I32 lvlen = LvTARGLEN(sv);
1801 sv_utf8_upgrade(lsv);
1802 sv_pos_u2b(lsv, &lvoff, &lvlen);
1803 sv_insert(lsv, lvoff, lvlen, tmps, len);
1804 LvTARGLEN(sv) = sv_len_utf8(sv);
1807 else if (lsv && SvUTF8(lsv)) {
1808 sv_pos_u2b(lsv, &lvoff, &lvlen);
1809 LvTARGLEN(sv) = len;
1810 tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
1811 sv_insert(lsv, lvoff, lvlen, tmps, len);
1815 sv_insert(lsv, lvoff, lvlen, tmps, len);
1816 LvTARGLEN(sv) = len;
1824 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1826 TAINT_IF((mg->mg_len & 1) ||
1827 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1832 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1835 if (PL_localizing) {
1836 if (PL_localizing == 1)
1841 else if (PL_tainted)
1849 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1851 SV * const lsv = LvTARG(sv);
1859 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1864 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1867 do_vecset(sv); /* XXX slurp this routine */
1872 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1875 if (LvTARGLEN(sv)) {
1877 SV *ahv = LvTARG(sv);
1878 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1883 AV* av = (AV*)LvTARG(sv);
1884 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1885 targ = AvARRAY(av)[LvTARGOFF(sv)];
1887 if (targ && targ != &PL_sv_undef) {
1888 /* somebody else defined it for us */
1889 SvREFCNT_dec(LvTARG(sv));
1890 LvTARG(sv) = SvREFCNT_inc(targ);
1892 SvREFCNT_dec(mg->mg_obj);
1893 mg->mg_obj = Nullsv;
1894 mg->mg_flags &= ~MGf_REFCOUNTED;
1899 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1904 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1910 sv_setsv(LvTARG(sv), sv);
1911 SvSETMAGIC(LvTARG(sv));
1917 Perl_vivify_defelem(pTHX_ SV *sv)
1922 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
1925 SV *ahv = LvTARG(sv);
1926 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1929 if (!value || value == &PL_sv_undef)
1930 Perl_croak(aTHX_ PL_no_helem_sv, mg->mg_obj);
1933 AV* av = (AV*)LvTARG(sv);
1934 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1935 LvTARG(sv) = Nullsv; /* array can't be extended */
1937 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1938 if (!svp || (value = *svp) == &PL_sv_undef)
1939 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1942 (void)SvREFCNT_inc(value);
1943 SvREFCNT_dec(LvTARG(sv));
1946 SvREFCNT_dec(mg->mg_obj);
1947 mg->mg_obj = Nullsv;
1948 mg->mg_flags &= ~MGf_REFCOUNTED;
1952 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1954 AV *av = (AV*)mg->mg_obj;
1955 SV **svp = AvARRAY(av);
1956 I32 i = AvFILLp(av);
1961 if (!SvWEAKREF(svp[i]))
1962 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1963 /* XXX Should we check that it hasn't changed? */
1964 SvRV_set(svp[i], 0);
1966 SvWEAKREF_off(svp[i]);
1971 SvREFCNT_dec(av); /* remove extra count added by sv_add_backref() */
1976 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1984 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1987 sv_unmagic(sv, PERL_MAGIC_bm);
1993 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1996 sv_unmagic(sv, PERL_MAGIC_fm);
2002 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2004 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2006 if (uf && uf->uf_set)
2007 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2012 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2015 sv_unmagic(sv, PERL_MAGIC_qr);
2020 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
2022 regexp *re = (regexp *)mg->mg_obj;
2028 #ifdef USE_LOCALE_COLLATE
2030 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2033 * RenE<eacute> Descartes said "I think not."
2034 * and vanished with a faint plop.
2038 Safefree(mg->mg_ptr);
2044 #endif /* USE_LOCALE_COLLATE */
2046 /* Just clear the UTF-8 cache data. */
2048 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2051 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2053 mg->mg_len = -1; /* The mg_len holds the len cache. */
2058 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2060 register const char *s;
2063 switch (*mg->mg_ptr) {
2064 case '\001': /* ^A */
2065 sv_setsv(PL_bodytarget, sv);
2067 case '\003': /* ^C */
2068 PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2071 case '\004': /* ^D */
2074 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2075 DEBUG_x(dump_all());
2077 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
2080 case '\005': /* ^E */
2081 if (*(mg->mg_ptr+1) == '\0') {
2082 #ifdef MACOS_TRADITIONAL
2083 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2086 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2089 SetLastError( SvIV(sv) );
2092 os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2094 /* will anyone ever use this? */
2095 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
2101 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2103 SvREFCNT_dec(PL_encoding);
2104 if (SvOK(sv) || SvGMAGICAL(sv)) {
2105 PL_encoding = newSVsv(sv);
2108 PL_encoding = Nullsv;
2112 case '\006': /* ^F */
2113 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2115 case '\010': /* ^H */
2116 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2118 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2120 Safefree(PL_inplace);
2122 PL_inplace = savesvpv(sv);
2124 PL_inplace = Nullch;
2126 case '\017': /* ^O */
2127 if (*(mg->mg_ptr+1) == '\0') {
2129 Safefree(PL_osname);
2133 TAINT_PROPER("assigning to $^O");
2134 PL_osname = savesvpv(sv);
2137 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2138 if (!PL_compiling.cop_io)
2139 PL_compiling.cop_io = newSVsv(sv);
2141 sv_setsv(PL_compiling.cop_io,sv);
2144 case '\020': /* ^P */
2145 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2146 if (PL_perldb && !PL_DBsingle)
2149 case '\024': /* ^T */
2151 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2153 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2156 case '\027': /* ^W & $^WARNING_BITS */
2157 if (*(mg->mg_ptr+1) == '\0') {
2158 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2159 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2160 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2161 | (i ? G_WARN_ON : G_WARN_OFF) ;
2164 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2165 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2166 if (!SvPOK(sv) && PL_localizing) {
2167 sv_setpvn(sv, WARN_NONEstring, WARNsize);
2168 PL_compiling.cop_warnings = pWARN_NONE;
2173 int accumulate = 0 ;
2174 int any_fatals = 0 ;
2175 const char * const ptr = (char*)SvPV(sv, len) ;
2176 for (i = 0 ; i < len ; ++i) {
2177 accumulate |= ptr[i] ;
2178 any_fatals |= (ptr[i] & 0xAA) ;
2181 PL_compiling.cop_warnings = pWARN_NONE;
2182 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
2183 PL_compiling.cop_warnings = pWARN_ALL;
2184 PL_dowarn |= G_WARN_ONCE ;
2187 if (specialWARN(PL_compiling.cop_warnings))
2188 PL_compiling.cop_warnings = newSVsv(sv) ;
2190 sv_setsv(PL_compiling.cop_warnings, sv);
2191 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2192 PL_dowarn |= G_WARN_ONCE ;
2200 if (PL_localizing) {
2201 if (PL_localizing == 1)
2202 SAVESPTR(PL_last_in_gv);
2204 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2205 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2208 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2209 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2210 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv,TRUE, SVt_PVIO);
2213 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2214 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2215 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv,TRUE, SVt_PVIO);
2218 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2221 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2222 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2223 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2226 IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2230 IO *io = GvIOp(PL_defoutgv);
2233 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
2234 IoFLAGS(io) &= ~IOf_FLUSH;
2236 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2237 PerlIO *ofp = IoOFP(io);
2239 (void)PerlIO_flush(ofp);
2240 IoFLAGS(io) |= IOf_FLUSH;
2246 SvREFCNT_dec(PL_rs);
2247 PL_rs = newSVsv(sv);
2251 SvREFCNT_dec(PL_ors_sv);
2252 if (SvOK(sv) || SvGMAGICAL(sv)) {
2253 PL_ors_sv = newSVsv(sv);
2261 SvREFCNT_dec(PL_ofs_sv);
2262 if (SvOK(sv) || SvGMAGICAL(sv)) {
2263 PL_ofs_sv = newSVsv(sv);
2272 PL_ofmt = savesvpv(sv);
2275 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2278 #ifdef COMPLEX_STATUS
2279 if (PL_localizing == 2) {
2280 PL_statusvalue = LvTARGOFF(sv);
2281 PL_statusvalue_vms = LvTARGLEN(sv);
2285 #ifdef VMSISH_STATUS
2287 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
2290 STATUS_UNIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
2295 # define PERL_VMS_BANG vaxc$errno
2297 # define PERL_VMS_BANG 0
2299 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2300 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2304 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2305 if (PL_delaymagic) {
2306 PL_delaymagic |= DM_RUID;
2307 break; /* don't do magic till later */
2310 (void)setruid((Uid_t)PL_uid);
2313 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
2315 #ifdef HAS_SETRESUID
2316 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
2318 if (PL_uid == PL_euid) { /* special case $< = $> */
2320 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2321 if (PL_uid != 0 && PerlProc_getuid() == 0)
2322 (void)PerlProc_setuid(0);
2324 (void)PerlProc_setuid(PL_uid);
2326 PL_uid = PerlProc_getuid();
2327 Perl_croak(aTHX_ "setruid() not implemented");
2332 PL_uid = PerlProc_getuid();
2333 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2336 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2337 if (PL_delaymagic) {
2338 PL_delaymagic |= DM_EUID;
2339 break; /* don't do magic till later */
2342 (void)seteuid((Uid_t)PL_euid);
2345 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
2347 #ifdef HAS_SETRESUID
2348 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
2350 if (PL_euid == PL_uid) /* special case $> = $< */
2351 PerlProc_setuid(PL_euid);
2353 PL_euid = PerlProc_geteuid();
2354 Perl_croak(aTHX_ "seteuid() not implemented");
2359 PL_euid = PerlProc_geteuid();
2360 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2363 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2364 if (PL_delaymagic) {
2365 PL_delaymagic |= DM_RGID;
2366 break; /* don't do magic till later */
2369 (void)setrgid((Gid_t)PL_gid);
2372 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
2374 #ifdef HAS_SETRESGID
2375 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
2377 if (PL_gid == PL_egid) /* special case $( = $) */
2378 (void)PerlProc_setgid(PL_gid);
2380 PL_gid = PerlProc_getgid();
2381 Perl_croak(aTHX_ "setrgid() not implemented");
2386 PL_gid = PerlProc_getgid();
2387 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2390 #ifdef HAS_SETGROUPS
2392 const char *p = SvPV(sv, len);
2393 Groups_t gary[NGROUPS];
2398 for (i = 0; i < NGROUPS; ++i) {
2399 while (*p && !isSPACE(*p))
2408 (void)setgroups(i, gary);
2410 #else /* HAS_SETGROUPS */
2411 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
2412 #endif /* HAS_SETGROUPS */
2413 if (PL_delaymagic) {
2414 PL_delaymagic |= DM_EGID;
2415 break; /* don't do magic till later */
2418 (void)setegid((Gid_t)PL_egid);
2421 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
2423 #ifdef HAS_SETRESGID
2424 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
2426 if (PL_egid == PL_gid) /* special case $) = $( */
2427 (void)PerlProc_setgid(PL_egid);
2429 PL_egid = PerlProc_getegid();
2430 Perl_croak(aTHX_ "setegid() not implemented");
2435 PL_egid = PerlProc_getegid();
2436 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2439 PL_chopset = SvPV_force(sv,len);
2441 #ifndef MACOS_TRADITIONAL
2443 LOCK_DOLLARZERO_MUTEX;
2444 #ifdef HAS_SETPROCTITLE
2445 /* The BSDs don't show the argv[] in ps(1) output, they
2446 * show a string from the process struct and provide
2447 * the setproctitle() routine to manipulate that. */
2450 # if __FreeBSD_version > 410001
2451 /* The leading "-" removes the "perl: " prefix,
2452 * but not the "(perl) suffix from the ps(1)
2453 * output, because that's what ps(1) shows if the
2454 * argv[] is modified. */
2455 setproctitle("-%s", s);
2456 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2457 /* This doesn't really work if you assume that
2458 * $0 = 'foobar'; will wipe out 'perl' from the $0
2459 * because in ps(1) output the result will be like
2460 * sprintf("perl: %s (perl)", s)
2461 * I guess this is a security feature:
2462 * one (a user process) cannot get rid of the original name.
2464 setproctitle("%s", s);
2468 #if defined(__hpux) && defined(PSTAT_SETCMD)
2472 un.pst_command = (char *)s;
2473 pstat(PSTAT_SETCMD, un, len, 0, 0);
2476 /* PL_origalen is set in perl_parse(). */
2477 s = SvPV_force(sv,len);
2478 if (len >= (STRLEN)PL_origalen-1) {
2479 /* Longer than original, will be truncated. We assume that
2480 * PL_origalen bytes are available. */
2481 Copy(s, PL_origargv[0], PL_origalen-1, char);
2484 /* Shorter than original, will be padded. */
2485 Copy(s, PL_origargv[0], len, char);
2486 PL_origargv[0][len] = 0;
2487 memset(PL_origargv[0] + len + 1,
2488 /* Is the space counterintuitive? Yes.
2489 * (You were expecting \0?)
2490 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2493 PL_origalen - len - 1);
2495 PL_origargv[0][PL_origalen-1] = 0;
2496 for (i = 1; i < PL_origargc; i++)
2498 UNLOCK_DOLLARZERO_MUTEX;
2506 Perl_whichsig(pTHX_ const char *sig)
2508 register char* const* sigv;
2510 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
2511 if (strEQ(sig,*sigv))
2512 return PL_sig_num[sigv - (char* const*)PL_sig_name];
2514 if (strEQ(sig,"CHLD"))
2518 if (strEQ(sig,"CLD"))
2525 Perl_sighandler(int sig)
2527 #ifdef PERL_GET_SIG_CONTEXT
2528 dTHXa(PERL_GET_SIG_CONTEXT);
2535 SV *sv = Nullsv, *tSv = PL_Sv;
2541 if (PL_savestack_ix + 15 <= PL_savestack_max)
2543 if (PL_markstack_ptr < PL_markstack_max - 2)
2545 if (PL_scopestack_ix < PL_scopestack_max - 3)
2548 if (!PL_psig_ptr[sig]) {
2549 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
2554 /* Max number of items pushed there is 3*n or 4. We cannot fix
2555 infinity, so we fix 4 (in fact 5): */
2557 PL_savestack_ix += 5; /* Protect save in progress. */
2558 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2561 PL_markstack_ptr++; /* Protect mark. */
2563 PL_scopestack_ix += 1;
2564 /* sv_2cv is too complicated, try a simpler variant first: */
2565 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2566 || SvTYPE(cv) != SVt_PVCV)
2567 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2569 if (!cv || !CvROOT(cv)) {
2570 if (ckWARN(WARN_SIGNAL))
2571 Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2572 PL_sig_name[sig], (gv ? GvENAME(gv)
2579 if(PL_psig_name[sig]) {
2580 sv = SvREFCNT_inc(PL_psig_name[sig]);
2582 #if !defined(PERL_IMPLICIT_CONTEXT)
2586 sv = sv_newmortal();
2587 sv_setpv(sv,PL_sig_name[sig]);
2590 PUSHSTACKi(PERLSI_SIGNAL);
2595 call_sv((SV*)cv, G_DISCARD|G_EVAL);
2598 if (SvTRUE(ERRSV)) {
2600 #ifdef HAS_SIGPROCMASK
2601 /* Handler "died", for example to get out of a restart-able read().
2602 * Before we re-do that on its behalf re-enable the signal which was
2603 * blocked by the system when we entered.
2607 sigaddset(&set,sig);
2608 sigprocmask(SIG_UNBLOCK, &set, NULL);
2610 /* Not clear if this will work */
2611 (void)rsignal(sig, SIG_IGN);
2612 (void)rsignal(sig, PL_csighandlerp);
2614 #endif /* !PERL_MICRO */
2619 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2623 PL_scopestack_ix -= 1;
2626 PL_op = myop; /* Apparently not needed... */
2628 PL_Sv = tSv; /* Restore global temporaries. */
2635 restore_magic(pTHX_ const void *p)
2637 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2638 SV* sv = mgs->mgs_sv;
2643 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2645 #ifdef PERL_OLD_COPY_ON_WRITE
2646 /* While magic was saved (and off) sv_setsv may well have seen
2647 this SV as a prime candidate for COW. */
2649 sv_force_normal(sv);
2653 SvFLAGS(sv) |= mgs->mgs_flags;
2657 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2660 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2662 /* If we're still on top of the stack, pop us off. (That condition
2663 * will be satisfied if restore_magic was called explicitly, but *not*
2664 * if it's being called via leave_scope.)
2665 * The reason for doing this is that otherwise, things like sv_2cv()
2666 * may leave alloc gunk on the savestack, and some code
2667 * (e.g. sighandler) doesn't expect that...
2669 if (PL_savestack_ix == mgs->mgs_ss_ix)
2671 I32 popval = SSPOPINT;
2672 assert(popval == SAVEt_DESTRUCTOR_X);
2673 PL_savestack_ix -= 2;
2675 assert(popval == SAVEt_ALLOC);
2677 PL_savestack_ix -= popval;
2683 unwind_handler_stack(pTHX_ const void *p)
2686 const U32 flags = *(const U32*)p;
2689 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2690 /* cxstack_ix-- Not needed, die already unwound it. */
2691 #if !defined(PERL_IMPLICIT_CONTEXT)
2693 SvREFCNT_dec(PL_sig_sv);
2699 * c-indentation-style: bsd
2701 * indent-tabs-mode: t
2704 * ex: set ts=8 sts=4 sw=4 noet: