3 * Copyright (c) 1991-2000, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "Sam sat on the ground and put his head in his hands. 'I wish I had never
12 * come here, and I don't want to see no more magic,' he said, and fell silent."
19 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
25 static void restore_magic(pTHXo_ void *p);
26 static void unwind_handler_stack(pTHXo_ void *p);
29 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
37 /* MGS is typedef'ed to struct magic_state in perl.h */
40 S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
43 assert(SvMAGICAL(sv));
45 SAVEDESTRUCTOR_X(restore_magic, (void*)mgs_ix);
47 mgs = SSPTR(mgs_ix, MGS*);
49 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
50 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
54 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
58 =for apidoc mg_magical
60 Turns on the magical status of an SV. See C<sv_magic>.
66 Perl_mg_magical(pTHX_ SV *sv)
69 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
70 MGVTBL* vtbl = mg->mg_virtual;
72 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
76 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
85 Do magic after a value is retrieved from the SV. See C<sv_magic>.
91 Perl_mg_get(pTHX_ SV *sv)
98 mgs_ix = SSNEW(sizeof(MGS));
99 save_magic(mgs_ix, sv);
102 while ((mg = *mgp) != 0) {
103 MGVTBL* vtbl = mg->mg_virtual;
104 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
105 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
106 /* Ignore this magic if it's been deleted */
107 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
108 (mg->mg_flags & MGf_GSKIP))
109 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
111 /* Advance to next magic (complicated by possible deletion) */
112 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
113 mgp = &mg->mg_moremagic;
117 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
120 restore_magic(aTHXo_ (void*)mgs_ix);
127 Do magic after a value is assigned to the SV. See C<sv_magic>.
133 Perl_mg_set(pTHX_ SV *sv)
139 mgs_ix = SSNEW(sizeof(MGS));
140 save_magic(mgs_ix, sv);
142 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
143 MGVTBL* vtbl = mg->mg_virtual;
144 nextmg = mg->mg_moremagic; /* it may delete itself */
145 if (mg->mg_flags & MGf_GSKIP) {
146 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
147 (SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
149 if (vtbl && vtbl->svt_set)
150 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
153 restore_magic(aTHXo_ (void*)mgs_ix);
158 =for apidoc mg_length
160 Report on the SV's length. See C<sv_magic>.
166 Perl_mg_length(pTHX_ SV *sv)
172 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
173 MGVTBL* vtbl = mg->mg_virtual;
174 if (vtbl && vtbl->svt_len) {
177 mgs_ix = SSNEW(sizeof(MGS));
178 save_magic(mgs_ix, sv);
179 /* omit MGf_GSKIP -- not changed here */
180 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
181 restore_magic(aTHXo_ (void*)mgs_ix);
186 junk = SvPV(sv, len);
191 Perl_mg_size(pTHX_ SV *sv)
196 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
197 MGVTBL* vtbl = mg->mg_virtual;
198 if (vtbl && vtbl->svt_len) {
201 mgs_ix = SSNEW(sizeof(MGS));
202 save_magic(mgs_ix, sv);
203 /* omit MGf_GSKIP -- not changed here */
204 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
205 restore_magic(aTHXo_ (void*)mgs_ix);
212 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
217 Perl_croak(aTHX_ "Size magic not implemented");
226 Clear something magical that the SV represents. See C<sv_magic>.
232 Perl_mg_clear(pTHX_ SV *sv)
237 mgs_ix = SSNEW(sizeof(MGS));
238 save_magic(mgs_ix, sv);
240 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
241 MGVTBL* vtbl = mg->mg_virtual;
242 /* omit GSKIP -- never set here */
244 if (vtbl && vtbl->svt_clear)
245 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
248 restore_magic(aTHXo_ (void*)mgs_ix);
255 Finds the magic pointer for type matching the SV. See C<sv_magic>.
261 Perl_mg_find(pTHX_ SV *sv, int type)
264 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
265 if (mg->mg_type == type)
274 Copies the magic from one SV to another. See C<sv_magic>.
280 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
284 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
285 if (isUPPER(mg->mg_type)) {
287 mg->mg_type == 'P' ? SvTIED_obj(sv, mg) :
288 (mg->mg_type == 'D' && mg->mg_obj) ? sv : mg->mg_obj,
289 toLOWER(mg->mg_type), key, klen);
299 Free any magic storage used by the SV. See C<sv_magic>.
305 Perl_mg_free(pTHX_ SV *sv)
309 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
310 MGVTBL* vtbl = mg->mg_virtual;
311 moremagic = mg->mg_moremagic;
312 if (vtbl && vtbl->svt_free)
313 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
314 if (mg->mg_ptr && mg->mg_type != 'g')
316 Safefree(mg->mg_ptr);
317 else if (mg->mg_len == HEf_SVKEY)
318 SvREFCNT_dec((SV*)mg->mg_ptr);
319 if (mg->mg_flags & MGf_REFCOUNTED)
320 SvREFCNT_dec(mg->mg_obj);
327 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
332 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
336 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
337 if (mg->mg_obj) /* @+ */
340 return rx->lastparen;
347 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
355 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
359 if (paren <= rx->nparens &&
360 (s = rx->startp[paren]) != -1 &&
361 (t = rx->endp[paren]) != -1)
363 if (mg->mg_obj) /* @+ */
374 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
376 Perl_croak(aTHX_ PL_no_modify);
382 Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
389 switch (*mg->mg_ptr) {
390 case '1': case '2': case '3': case '4':
391 case '5': case '6': case '7': case '8': case '9': case '&':
392 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
394 paren = atoi(mg->mg_ptr); /* $& is in [0] */
396 if (paren <= rx->nparens &&
397 (s1 = rx->startp[paren]) != -1 &&
398 (t1 = rx->endp[paren]) != -1)
402 if (i > 0 && DO_UTF8(PL_reg_sv)) {
403 char *s = rx->subbeg + s1;
404 char *send = rx->subbeg + t1;
406 i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
409 Perl_croak(aTHX_ "panic: magic_len: %d", i);
415 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
416 paren = rx->lastparen;
422 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
423 if (rx->startp[0] != -1) {
434 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
435 if (rx->endp[0] != -1) {
436 i = rx->sublen - rx->endp[0];
447 if (!SvPOK(sv) && SvNIOK(sv)) {
457 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
464 switch (*mg->mg_ptr) {
465 case '\001': /* ^A */
466 sv_setsv(sv, PL_bodytarget);
468 case '\003': /* ^C */
469 sv_setiv(sv, (IV)PL_minus_c);
472 case '\004': /* ^D */
473 sv_setiv(sv, (IV)(PL_debug & 32767));
474 #if defined(YYDEBUG) && defined(DEBUGGING)
475 PL_yydebug = (PL_debug & 1);
478 case '\005': /* ^E */
479 #ifdef MACOS_TRADITIONAL
483 sv_setnv(sv,(double)gMacPerl_OSErr);
484 sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
489 # include <descrip.h>
490 # include <starlet.h>
492 $DESCRIPTOR(msgdsc,msg);
493 sv_setnv(sv,(NV) vaxc$errno);
494 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
495 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
501 if (!(_emx_env & 0x200)) { /* Under DOS */
502 sv_setnv(sv, (NV)errno);
503 sv_setpv(sv, errno ? Strerror(errno) : "");
505 if (errno != errno_isOS2) {
506 int tmp = _syserrno();
507 if (tmp) /* 2nd call to _syserrno() makes it 0 */
510 sv_setnv(sv, (NV)Perl_rc);
511 sv_setpv(sv, os2error(Perl_rc));
516 DWORD dwErr = GetLastError();
517 sv_setnv(sv, (NV)dwErr);
520 PerlProc_GetOSError(sv, dwErr);
527 sv_setnv(sv, (NV)errno);
528 sv_setpv(sv, errno ? Strerror(errno) : "");
533 SvNOK_on(sv); /* what a wonderful hack! */
535 case '\006': /* ^F */
536 sv_setiv(sv, (IV)PL_maxsysfd);
538 case '\010': /* ^H */
539 sv_setiv(sv, (IV)PL_hints);
541 case '\011': /* ^I */ /* NOT \t in EBCDIC */
543 sv_setpv(sv, PL_inplace);
545 sv_setsv(sv, &PL_sv_undef);
547 case '\017': /* ^O & ^OPEN */
548 if (*(mg->mg_ptr+1) == '\0')
549 sv_setpv(sv, PL_osname);
550 else if (strEQ(mg->mg_ptr, "\017PEN")) {
551 if (!PL_compiling.cop_io)
552 sv_setsv(sv, &PL_sv_undef);
554 sv_setsv(sv, PL_compiling.cop_io);
558 case '\020': /* ^P */
559 sv_setiv(sv, (IV)PL_perldb);
561 case '\023': /* ^S */
563 if (PL_lex_state != LEX_NOTPARSING)
566 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
569 case '\024': /* ^T */
571 sv_setnv(sv, PL_basetime);
573 sv_setiv(sv, (IV)PL_basetime);
576 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
577 if (*(mg->mg_ptr+1) == '\0')
578 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
579 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
580 if (PL_compiling.cop_warnings == pWARN_NONE ||
581 PL_compiling.cop_warnings == pWARN_STD)
583 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
585 else if (PL_compiling.cop_warnings == pWARN_ALL) {
586 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
589 sv_setsv(sv, PL_compiling.cop_warnings);
593 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
594 sv_setiv(sv, (IV)PL_widesyscalls);
596 case '1': case '2': case '3': case '4':
597 case '5': case '6': case '7': case '8': case '9': case '&':
598 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
602 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
603 * XXX Does the new way break anything?
605 paren = atoi(mg->mg_ptr); /* $& is in [0] */
607 if (paren <= rx->nparens &&
608 (s1 = rx->startp[paren]) != -1 &&
609 (t1 = rx->endp[paren]) != -1)
620 was_tainted = PL_tainted;
624 if (DO_UTF8(PL_reg_sv))
629 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
634 sv_setsv(sv,&PL_sv_undef);
637 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
638 paren = rx->lastparen;
642 sv_setsv(sv,&PL_sv_undef);
645 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
646 if ((s = rx->subbeg) && rx->startp[0] != -1) {
651 sv_setsv(sv,&PL_sv_undef);
654 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
655 if (rx->subbeg && rx->endp[0] != -1) {
656 s = rx->subbeg + rx->endp[0];
657 i = rx->sublen - rx->endp[0];
661 sv_setsv(sv,&PL_sv_undef);
665 if (GvIO(PL_last_in_gv)) {
666 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
672 sv_setiv(sv, (IV)STATUS_CURRENT);
673 #ifdef COMPLEX_STATUS
674 LvTARGOFF(sv) = PL_statusvalue;
675 LvTARGLEN(sv) = PL_statusvalue_vms;
680 s = IoTOP_NAME(GvIOp(PL_defoutgv));
684 sv_setpv(sv,GvENAME(PL_defoutgv));
689 s = IoFMT_NAME(GvIOp(PL_defoutgv));
691 s = GvENAME(PL_defoutgv);
696 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
699 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
702 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
710 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
713 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
720 sv_setpv(sv,PL_ofmt);
724 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
725 sv_setpv(sv, errno ? Strerror(errno) : "");
728 int saveerrno = errno;
729 sv_setnv(sv, (NV)errno);
731 if (errno == errno_isOS2 || errno == errno_isOS2_set)
732 sv_setpv(sv, os2error(Perl_rc));
735 sv_setpv(sv, errno ? Strerror(errno) : "");
739 SvNOK_on(sv); /* what a wonderful hack! */
742 sv_setiv(sv, (IV)PL_uid);
745 sv_setiv(sv, (IV)PL_euid);
748 sv_setiv(sv, (IV)PL_gid);
750 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
754 sv_setiv(sv, (IV)PL_egid);
756 Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
761 Groups_t gary[NGROUPS];
762 i = getgroups(NGROUPS,gary);
764 Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
767 (void)SvIOK_on(sv); /* what a wonderful hack! */
771 #ifndef MACOS_TRADITIONAL
777 sv_setsv(sv, thr->errsv);
779 #endif /* USE_THREADS */
785 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
787 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
789 if (uf && uf->uf_val)
790 (*uf->uf_val)(uf->uf_index, sv);
795 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
806 #ifdef DYNAMIC_ENV_FETCH
807 /* We just undefd an environment var. Is a replacement */
808 /* waiting in the wings? */
811 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
812 s = SvPV(*valp, len);
816 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
817 /* And you'll never guess what the dog had */
818 /* in its mouth... */
820 MgTAINTEDDIR_off(mg);
822 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
823 char pathbuf[256], eltbuf[256], *cp, *elt = s;
827 do { /* DCL$PATH may be a search list */
828 while (1) { /* as may dev portion of any element */
829 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
830 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
831 cando_by_name(S_IWUSR,0,elt) ) {
836 if ((cp = strchr(elt, ':')) != Nullch)
838 if (my_trnlnm(elt, eltbuf, j++))
844 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
847 if (s && klen == 4 && strEQ(ptr,"PATH")) {
848 char *strend = s + len;
853 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
856 if (i >= sizeof tmpbuf /* too long -- assume the worst */
858 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
865 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
871 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
874 my_setenv(MgPV(mg,n_a),Nullch);
879 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
882 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
887 magic_clear_all_env(sv,mg);
888 hv_iterinit((HV*)sv);
889 while ((entry = hv_iternext((HV*)sv))) {
891 my_setenv(hv_iterkey(entry, &keylen),
892 SvPV(hv_iterval((HV*)sv, entry), n_a));
900 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
902 #if defined(VMS) || defined(EPOC)
903 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
905 # ifdef PERL_IMPLICIT_SYS
909 char *envv = GetEnvironmentStrings();
913 char *end = strchr(cur,'=');
914 if (end && end != cur) {
916 my_setenv(cur,Nullch);
918 cur = end + strlen(end+1)+2;
920 else if ((len = strlen(cur)))
923 FreeEnvironmentStrings(envv);
925 # ifndef PERL_USE_SAFE_PUTENV
928 if (environ == PL_origenviron)
929 environ = (char**)safesysmalloc(sizeof(char*));
931 for (i = 0; environ[i]; i++)
932 safesysfree(environ[i]);
933 # endif /* PERL_USE_SAFE_PUTENV */
938 # endif /* PERL_IMPLICIT_SYS */
945 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
949 /* Are we fetching a signal entry? */
950 i = whichsig(MgPV(mg,n_a));
953 sv_setsv(sv,PL_psig_ptr[i]);
955 Sighandler_t sigstate = rsignal_state(i);
957 /* cache state so we don't fetch it again */
958 if(sigstate == SIG_IGN)
959 sv_setpv(sv,"IGNORE");
961 sv_setsv(sv,&PL_sv_undef);
962 PL_psig_ptr[i] = SvREFCNT_inc(sv);
969 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
973 /* Are we clearing a signal entry? */
974 i = whichsig(MgPV(mg,n_a));
977 SvREFCNT_dec(PL_psig_ptr[i]);
980 if(PL_psig_name[i]) {
981 SvREFCNT_dec(PL_psig_name[i]);
989 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
998 if (strEQ(s,"__DIE__"))
1000 else if (strEQ(s,"__WARN__"))
1003 Perl_croak(aTHX_ "No such hook: %s", s);
1011 i = whichsig(s); /* ...no, a brick */
1013 if (ckWARN(WARN_SIGNAL))
1014 Perl_warner(aTHX_ WARN_SIGNAL, "No such signal: SIG%s", s);
1017 SvREFCNT_dec(PL_psig_name[i]);
1018 SvREFCNT_dec(PL_psig_ptr[i]);
1019 PL_psig_ptr[i] = SvREFCNT_inc(sv);
1020 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1021 PL_psig_name[i] = newSVpvn(s, len);
1022 SvREADONLY_on(PL_psig_name[i]);
1024 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
1026 (void)rsignal(i, PL_sighandlerp);
1028 *svp = SvREFCNT_inc(sv);
1031 s = SvPV_force(sv,len);
1032 if (strEQ(s,"IGNORE")) {
1034 (void)rsignal(i, SIG_IGN);
1038 else if (strEQ(s,"DEFAULT") || !*s) {
1040 (void)rsignal(i, SIG_DFL);
1046 * We should warn if HINT_STRICT_REFS, but without
1047 * access to a known hint bit in a known OP, we can't
1048 * tell whether HINT_STRICT_REFS is in force or not.
1050 if (!strchr(s,':') && !strchr(s,'\''))
1051 sv_insert(sv, 0, 0, "main::", 6);
1053 (void)rsignal(i, PL_sighandlerp);
1055 *svp = SvREFCNT_inc(sv);
1059 #endif /* !PERL_MICRO */
1062 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1064 PL_sub_generation++;
1069 Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
1071 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
1072 PL_amagic_generation++;
1078 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1080 HV *hv = (HV*)LvTARG(sv);
1085 (void) hv_iterinit(hv);
1086 if (! SvTIED_mg((SV*)hv, 'P'))
1090 while ((entry = hv_iternext(hv))) {
1096 sv_setiv(sv, (IV)i);
1101 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1104 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
1109 /* caller is responsible for stack switching/cleanup */
1111 S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1117 PUSHs(SvTIED_obj(sv, mg));
1120 if (mg->mg_len >= 0)
1121 PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
1122 else if (mg->mg_len == HEf_SVKEY)
1123 PUSHs((SV*)mg->mg_ptr);
1125 else if (mg->mg_type == 'p') {
1126 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1134 return call_method(meth, flags);
1138 S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
1144 PUSHSTACKi(PERLSI_MAGIC);
1146 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1147 sv_setsv(sv, *PL_stack_sp--);
1157 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1159 magic_methpack(sv,mg,"FETCH");
1161 mg->mg_flags |= MGf_GSKIP;
1166 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1170 PUSHSTACKi(PERLSI_MAGIC);
1171 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1178 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1180 return magic_methpack(sv,mg,"DELETE");
1185 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1192 PUSHSTACKi(PERLSI_MAGIC);
1193 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1194 sv = *PL_stack_sp--;
1195 retval = (U32) SvIV(sv)-1;
1204 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1209 PUSHSTACKi(PERLSI_MAGIC);
1211 XPUSHs(SvTIED_obj(sv, mg));
1213 call_method("CLEAR", G_SCALAR|G_DISCARD);
1220 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1223 const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1227 PUSHSTACKi(PERLSI_MAGIC);
1230 PUSHs(SvTIED_obj(sv, mg));
1235 if (call_method(meth, G_SCALAR))
1236 sv_setsv(key, *PL_stack_sp--);
1245 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
1247 return magic_methpack(sv,mg,"EXISTS");
1251 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1261 svp = av_fetch(GvAV(gv),
1262 atoi(MgPV(mg,n_a)), FALSE);
1263 if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
1269 Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
1271 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1276 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
1278 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1283 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
1285 SV* lsv = LvTARG(sv);
1287 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1288 mg = mg_find(lsv, 'g');
1289 if (mg && mg->mg_len >= 0) {
1292 sv_pos_b2u(lsv, &i);
1293 sv_setiv(sv, i + PL_curcop->cop_arybase);
1302 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
1304 SV* lsv = LvTARG(sv);
1311 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1312 mg = mg_find(lsv, 'g');
1316 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1317 mg = mg_find(lsv, 'g');
1319 else if (!SvOK(sv)) {
1323 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1325 pos = SvIV(sv) - PL_curcop->cop_arybase;
1328 ulen = sv_len_utf8(lsv);
1343 sv_pos_u2b(lsv, &p, 0);
1348 mg->mg_flags &= ~MGf_MINMATCH;
1354 Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
1356 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1358 gv_efullname3(sv,((GV*)sv), "*");
1362 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1367 Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
1376 if (*s == '*' && s[1])
1378 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1383 GvGP(sv) = gp_ref(GvGP(gv));
1388 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
1391 SV *lsv = LvTARG(sv);
1392 char *tmps = SvPV(lsv,len);
1393 I32 offs = LvTARGOFF(sv);
1394 I32 rem = LvTARGLEN(sv);
1398 if (rem + offs > len)
1400 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1407 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
1410 char *tmps = SvPV(sv,len);
1411 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1416 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
1418 TAINT_IF((mg->mg_len & 1) ||
1419 ((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
1424 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
1426 if (PL_localizing) {
1427 if (PL_localizing == 1)
1432 else if (PL_tainted)
1440 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
1442 SV *lsv = LvTARG(sv);
1449 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
1454 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
1456 do_vecset(sv); /* XXX slurp this routine */
1461 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
1464 if (LvTARGLEN(sv)) {
1466 SV *ahv = LvTARG(sv);
1467 if (SvTYPE(ahv) == SVt_PVHV) {
1468 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1473 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1479 AV* av = (AV*)LvTARG(sv);
1480 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1481 targ = AvARRAY(av)[LvTARGOFF(sv)];
1483 if (targ && targ != &PL_sv_undef) {
1484 /* somebody else defined it for us */
1485 SvREFCNT_dec(LvTARG(sv));
1486 LvTARG(sv) = SvREFCNT_inc(targ);
1488 SvREFCNT_dec(mg->mg_obj);
1489 mg->mg_obj = Nullsv;
1490 mg->mg_flags &= ~MGf_REFCOUNTED;
1495 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1500 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
1505 sv_setsv(LvTARG(sv), sv);
1506 SvSETMAGIC(LvTARG(sv));
1512 Perl_vivify_defelem(pTHX_ SV *sv)
1517 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1520 SV *ahv = LvTARG(sv);
1522 if (SvTYPE(ahv) == SVt_PVHV) {
1523 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1528 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1532 if (!value || value == &PL_sv_undef)
1533 Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
1536 AV* av = (AV*)LvTARG(sv);
1537 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1538 LvTARG(sv) = Nullsv; /* array can't be extended */
1540 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1541 if (!svp || (value = *svp) == &PL_sv_undef)
1542 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
1545 (void)SvREFCNT_inc(value);
1546 SvREFCNT_dec(LvTARG(sv));
1549 SvREFCNT_dec(mg->mg_obj);
1550 mg->mg_obj = Nullsv;
1551 mg->mg_flags &= ~MGf_REFCOUNTED;
1555 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
1557 AV *av = (AV*)mg->mg_obj;
1558 SV **svp = AvARRAY(av);
1559 I32 i = AvFILLp(av);
1561 if (svp[i] && svp[i] != &PL_sv_undef) {
1562 if (!SvWEAKREF(svp[i]))
1563 Perl_croak(aTHX_ "panic: magic_killbackrefs");
1564 /* XXX Should we check that it hasn't changed? */
1566 (void)SvOK_off(svp[i]);
1567 SvWEAKREF_off(svp[i]);
1568 svp[i] = &PL_sv_undef;
1576 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
1584 Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
1586 sv_unmagic(sv, 'B');
1592 Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
1594 sv_unmagic(sv, 'f');
1600 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
1602 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1604 if (uf && uf->uf_set)
1605 (*uf->uf_set)(uf->uf_index, sv);
1610 Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
1612 regexp *re = (regexp *)mg->mg_obj;
1617 #ifdef USE_LOCALE_COLLATE
1619 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
1622 * RenE<eacute> Descartes said "I think not."
1623 * and vanished with a faint plop.
1626 Safefree(mg->mg_ptr);
1632 #endif /* USE_LOCALE_COLLATE */
1635 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
1640 switch (*mg->mg_ptr) {
1641 case '\001': /* ^A */
1642 sv_setsv(PL_bodytarget, sv);
1644 case '\003': /* ^C */
1645 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1648 case '\004': /* ^D */
1649 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1650 DEBUG_x(dump_all());
1652 case '\005': /* ^E */
1653 #ifdef MACOS_TRADITIONAL
1654 gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1657 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1660 SetLastError( SvIV(sv) );
1663 /* will anyone ever use this? */
1664 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1670 case '\006': /* ^F */
1671 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1673 case '\010': /* ^H */
1674 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1676 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1678 Safefree(PL_inplace);
1680 PL_inplace = savepv(SvPV(sv,len));
1682 PL_inplace = Nullch;
1684 case '\017': /* ^O */
1685 if (*(mg->mg_ptr+1) == '\0') {
1687 Safefree(PL_osname);
1689 PL_osname = savepv(SvPV(sv,len));
1693 else if (strEQ(mg->mg_ptr, "\017PEN")) {
1694 if (!PL_compiling.cop_io)
1695 PL_compiling.cop_io = newSVsv(sv);
1697 sv_setsv(PL_compiling.cop_io,sv);
1700 case '\020': /* ^P */
1701 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1702 if (PL_perldb && !PL_DBsingle)
1705 case '\024': /* ^T */
1707 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1709 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1712 case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
1713 if (*(mg->mg_ptr+1) == '\0') {
1714 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1715 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1716 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
1717 | (i ? G_WARN_ON : G_WARN_OFF) ;
1720 else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
1721 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1722 if (!SvPOK(sv) && PL_localizing) {
1723 sv_setpvn(sv, WARN_NONEstring, WARNsize);
1724 PL_compiling.cop_warnings = pWARN_NONE;
1729 int accumulate = 0 ;
1730 int any_fatals = 0 ;
1731 char * ptr = (char*)SvPV(sv, len) ;
1732 for (i = 0 ; i < len ; ++i) {
1733 accumulate |= ptr[i] ;
1734 any_fatals |= (ptr[i] & 0xAA) ;
1737 PL_compiling.cop_warnings = pWARN_NONE;
1738 else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
1739 PL_compiling.cop_warnings = pWARN_ALL;
1740 PL_dowarn |= G_WARN_ONCE ;
1743 if (specialWARN(PL_compiling.cop_warnings))
1744 PL_compiling.cop_warnings = newSVsv(sv) ;
1746 sv_setsv(PL_compiling.cop_warnings, sv);
1747 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
1748 PL_dowarn |= G_WARN_ONCE ;
1754 else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
1755 PL_widesyscalls = SvTRUE(sv);
1758 if (PL_localizing) {
1759 if (PL_localizing == 1)
1760 SAVESPTR(PL_last_in_gv);
1762 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1763 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1766 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1767 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1768 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1771 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1772 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1773 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1776 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1779 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1780 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1781 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1784 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1788 IO *io = GvIOp(PL_defoutgv);
1789 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1790 IoFLAGS(io) &= ~IOf_FLUSH;
1792 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1793 PerlIO *ofp = IoOFP(io);
1795 (void)PerlIO_flush(ofp);
1796 IoFLAGS(io) |= IOf_FLUSH;
1802 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1803 PL_multiline = (i != 0);
1806 SvREFCNT_dec(PL_nrs);
1807 PL_nrs = newSVsv(sv);
1808 SvREFCNT_dec(PL_rs);
1809 PL_rs = SvREFCNT_inc(PL_nrs);
1813 SvREFCNT_dec(PL_ors_sv);
1814 if (SvOK(sv) || SvGMAGICAL(sv)) {
1815 PL_ors_sv = newSVsv(sv);
1823 SvREFCNT_dec(PL_ofs_sv);
1824 if (SvOK(sv) || SvGMAGICAL(sv)) {
1825 PL_ofs_sv = newSVsv(sv);
1834 PL_ofmt = savepv(SvPV(sv,len));
1837 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1840 #ifdef COMPLEX_STATUS
1841 if (PL_localizing == 2) {
1842 PL_statusvalue = LvTARGOFF(sv);
1843 PL_statusvalue_vms = LvTARGLEN(sv);
1847 #ifdef VMSISH_STATUS
1849 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1852 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1855 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1856 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1859 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1860 if (PL_delaymagic) {
1861 PL_delaymagic |= DM_RUID;
1862 break; /* don't do magic till later */
1865 (void)setruid((Uid_t)PL_uid);
1868 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1870 #ifdef HAS_SETRESUID
1871 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1873 if (PL_uid == PL_euid) /* special case $< = $> */
1874 (void)PerlProc_setuid(PL_uid);
1876 PL_uid = PerlProc_getuid();
1877 Perl_croak(aTHX_ "setruid() not implemented");
1882 PL_uid = PerlProc_getuid();
1883 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1886 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1887 if (PL_delaymagic) {
1888 PL_delaymagic |= DM_EUID;
1889 break; /* don't do magic till later */
1892 (void)seteuid((Uid_t)PL_euid);
1895 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1897 #ifdef HAS_SETRESUID
1898 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1900 if (PL_euid == PL_uid) /* special case $> = $< */
1901 PerlProc_setuid(PL_euid);
1903 PL_euid = PerlProc_geteuid();
1904 Perl_croak(aTHX_ "seteuid() not implemented");
1909 PL_euid = PerlProc_geteuid();
1910 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1913 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1914 if (PL_delaymagic) {
1915 PL_delaymagic |= DM_RGID;
1916 break; /* don't do magic till later */
1919 (void)setrgid((Gid_t)PL_gid);
1922 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1924 #ifdef HAS_SETRESGID
1925 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1927 if (PL_gid == PL_egid) /* special case $( = $) */
1928 (void)PerlProc_setgid(PL_gid);
1930 PL_gid = PerlProc_getgid();
1931 Perl_croak(aTHX_ "setrgid() not implemented");
1936 PL_gid = PerlProc_getgid();
1937 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1940 #ifdef HAS_SETGROUPS
1942 char *p = SvPV(sv, len);
1943 Groups_t gary[NGROUPS];
1948 for (i = 0; i < NGROUPS; ++i) {
1949 while (*p && !isSPACE(*p))
1958 (void)setgroups(i, gary);
1960 #else /* HAS_SETGROUPS */
1961 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1962 #endif /* HAS_SETGROUPS */
1963 if (PL_delaymagic) {
1964 PL_delaymagic |= DM_EGID;
1965 break; /* don't do magic till later */
1968 (void)setegid((Gid_t)PL_egid);
1971 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1973 #ifdef HAS_SETRESGID
1974 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1976 if (PL_egid == PL_gid) /* special case $) = $( */
1977 (void)PerlProc_setgid(PL_egid);
1979 PL_egid = PerlProc_getegid();
1980 Perl_croak(aTHX_ "setegid() not implemented");
1985 PL_egid = PerlProc_getegid();
1986 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1989 PL_chopset = SvPV_force(sv,len);
1991 #ifndef MACOS_TRADITIONAL
1993 #ifdef HAS_SETPROCTITLE
1994 /* The BSDs don't show the argv[] in ps(1) output, they
1995 * show a string from the process struct and provide
1996 * the setproctitle() routine to manipulate that. */
1999 # if __FreeBSD_version >= 410001
2000 /* The leading "-" removes the "perl: " prefix,
2001 * but not the "(perl) suffix from the ps(1)
2002 * output, because that's what ps(1) shows if the
2003 * argv[] is modified. */
2004 setproctitle("-%s", s, len + 1);
2005 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2006 /* This doesn't really work if you assume that
2007 * $0 = 'foobar'; will wipe out 'perl' from the $0
2008 * because in ps(1) output the result will be like
2009 * sprintf("perl: %s (perl)", s)
2010 * I guess this is a security feature:
2011 * one (a user process) cannot get rid of the original name.
2013 setproctitle("%s", s);
2020 /* See if all the arguments are contiguous in memory */
2021 for (i = 1; i < PL_origargc; i++) {
2022 if (PL_origargv[i] == s + 1
2024 || PL_origargv[i] == s + 2
2029 s += strlen(s); /* this one is ok too */
2034 /* can grab env area too? */
2035 if (PL_origenviron && (PL_origenviron[0] == s + 1
2037 || (PL_origenviron[0] == s + 9 && (s += 8))
2040 my_setenv("NoNe SuCh", Nullch);
2041 /* force copy of environment */
2042 for (i = 0; PL_origenviron[i]; i++)
2043 if (PL_origenviron[i] == s + 1) {
2050 PL_origalen = s - PL_origargv[0];
2052 s = SvPV_force(sv,len);
2054 if (i >= PL_origalen) {
2056 /* don't allow system to limit $0 seen by script */
2057 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
2058 Copy(s, PL_origargv[0], i, char);
2059 s = PL_origargv[0]+i;
2063 Copy(s, PL_origargv[0], i, char);
2064 s = PL_origargv[0]+i;
2066 while (++i < PL_origalen)
2068 s = PL_origargv[0]+i;
2069 for (i = 1; i < PL_origargc; i++)
2070 PL_origargv[i] = Nullch;
2076 sv_setsv(thr->errsv, sv);
2078 #endif /* USE_THREADS */
2085 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
2087 DEBUG_S(PerlIO_printf(Perl_debug_log,
2088 "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
2089 PTR2UV(thr), PTR2UV(sv));)
2091 Perl_croak(aTHX_ "panic: magic_mutexfree");
2092 MUTEX_DESTROY(MgMUTEXP(mg));
2093 COND_DESTROY(MgCONDP(mg));
2096 #endif /* USE_THREADS */
2099 Perl_whichsig(pTHX_ char *sig)
2101 register char **sigv;
2103 for (sigv = PL_sig_name+1; *sigv; sigv++)
2104 if (strEQ(sig,*sigv))
2105 return PL_sig_num[sigv - PL_sig_name];
2107 if (strEQ(sig,"CHLD"))
2111 if (strEQ(sig,"CLD"))
2120 Perl_sighandler(int sig)
2122 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2123 dTHXoa(PL_curinterp); /* fake TLS, because signals don't do TLS */
2130 SV *sv, *tSv = PL_Sv;
2134 I32 o_save_i = PL_savestack_ix;
2137 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
2138 PERL_SET_THX(aTHXo); /* fake TLS, see above */
2141 if (PL_savestack_ix + 15 <= PL_savestack_max)
2143 if (PL_markstack_ptr < PL_markstack_max - 2)
2145 if (PL_retstack_ix < PL_retstack_max - 2)
2147 if (PL_scopestack_ix < PL_scopestack_max - 3)
2150 if (!PL_psig_ptr[sig])
2151 Perl_die(aTHX_ "Signal SIG%s received, but no signal handler set.\n",
2154 /* Max number of items pushed there is 3*n or 4. We cannot fix
2155 infinity, so we fix 4 (in fact 5): */
2157 PL_savestack_ix += 5; /* Protect save in progress. */
2158 o_save_i = PL_savestack_ix;
2159 SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
2162 PL_markstack_ptr++; /* Protect mark. */
2165 PL_retstack[PL_retstack_ix] = NULL;
2168 PL_scopestack_ix += 1;
2169 /* sv_2cv is too complicated, try a simpler variant first: */
2170 if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
2171 || SvTYPE(cv) != SVt_PVCV)
2172 cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
2174 if (!cv || !CvROOT(cv)) {
2175 if (ckWARN(WARN_SIGNAL))
2176 Perl_warner(aTHX_ WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2177 PL_sig_name[sig], (gv ? GvENAME(gv)
2184 if(PL_psig_name[sig]) {
2185 sv = SvREFCNT_inc(PL_psig_name[sig]);
2189 sv = sv_newmortal();
2190 sv_setpv(sv,PL_sig_name[sig]);
2193 PUSHSTACKi(PERLSI_SIGNAL);
2198 call_sv((SV*)cv, G_DISCARD);
2203 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2209 PL_scopestack_ix -= 1;
2212 PL_op = myop; /* Apparently not needed... */
2214 PL_Sv = tSv; /* Restore global temporaries. */
2225 restore_magic(pTHXo_ void *p)
2227 MGS* mgs = SSPTR(PTR2IV(p), MGS*);
2228 SV* sv = mgs->mgs_sv;
2233 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2236 SvFLAGS(sv) |= mgs->mgs_flags;
2240 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2243 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
2245 /* If we're still on top of the stack, pop us off. (That condition
2246 * will be satisfied if restore_magic was called explicitly, but *not*
2247 * if it's being called via leave_scope.)
2248 * The reason for doing this is that otherwise, things like sv_2cv()
2249 * may leave alloc gunk on the savestack, and some code
2250 * (e.g. sighandler) doesn't expect that...
2252 if (PL_savestack_ix == mgs->mgs_ss_ix)
2254 I32 popval = SSPOPINT;
2255 assert(popval == SAVEt_DESTRUCTOR_X);
2256 PL_savestack_ix -= 2;
2258 assert(popval == SAVEt_ALLOC);
2260 PL_savestack_ix -= popval;
2266 unwind_handler_stack(pTHXo_ void *p)
2268 U32 flags = *(U32*)p;
2271 PL_savestack_ix -= 5; /* Unprotect save in progress. */
2272 /* cxstack_ix-- Not needed, die already unwound it. */
2274 SvREFCNT_dec(sig_sv);