3 * Copyright (c) 1991-1997, 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."
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
30 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
37 typedef struct magic_state MGS;
39 static void restore_magic _((void *p));
42 save_magic(MGS *mgs, SV *sv)
44 assert(SvMAGICAL(sv));
47 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
48 SAVEDESTRUCTOR(restore_magic, mgs);
52 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
56 restore_magic(void *p)
61 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
64 SvFLAGS(sv) |= mgs->mgs_flags;
68 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
76 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
77 MGVTBL* vtbl = mg->mg_virtual;
79 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
83 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
101 while ((mg = *mgp) != 0) {
102 MGVTBL* vtbl = mg->mg_virtual;
103 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
104 (*vtbl->svt_get)(sv, mg);
105 /* Ignore this magic if it's been deleted */
106 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
107 (mg->mg_flags & MGf_GSKIP))
110 /* Advance to next magic (complicated by possible deletion) */
111 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
112 mgp = &mg->mg_moremagic;
116 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
131 save_magic(&mgs, sv);
133 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
134 MGVTBL* vtbl = mg->mg_virtual;
135 nextmg = mg->mg_moremagic; /* it may delete itself */
136 if (mg->mg_flags & MGf_GSKIP) {
137 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
140 if (vtbl && vtbl->svt_set)
141 (*vtbl->svt_set)(sv, mg);
155 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
156 MGVTBL* vtbl = mg->mg_virtual;
157 if (vtbl && vtbl->svt_len) {
161 save_magic(&mgs, sv);
162 /* omit MGf_GSKIP -- not changed here */
163 len = (*vtbl->svt_len)(sv, mg);
169 junk = SvPV(sv, len);
180 save_magic(&mgs, sv);
182 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
183 MGVTBL* vtbl = mg->mg_virtual;
184 /* omit GSKIP -- never set here */
186 if (vtbl && vtbl->svt_clear)
187 (*vtbl->svt_clear)(sv, mg);
195 mg_find(SV *sv, int type)
198 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
199 if (mg->mg_type == type)
206 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
210 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
211 if (isUPPER(mg->mg_type)) {
212 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
224 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
225 MGVTBL* vtbl = mg->mg_virtual;
226 moremagic = mg->mg_moremagic;
227 if (vtbl && vtbl->svt_free)
228 (*vtbl->svt_free)(sv, mg);
229 if (mg->mg_ptr && mg->mg_type != 'g')
231 Safefree(mg->mg_ptr);
232 else if (mg->mg_len == HEf_SVKEY)
233 SvREFCNT_dec((SV*)mg->mg_ptr);
234 if (mg->mg_flags & MGf_REFCOUNTED)
235 SvREFCNT_dec(mg->mg_obj);
242 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
247 magic_len(SV *sv, MAGIC *mg)
256 switch (*mg->mg_ptr) {
257 case '1': case '2': case '3': case '4':
258 case '5': case '6': case '7': case '8': case '9': case '&':
259 if (curpm && (rx = curpm->op_pmregexp)) {
260 paren = atoi(mg->mg_ptr);
262 if (paren <= rx->nparens &&
263 (s = rx->startp[paren]) &&
264 (t = rx->endp[paren]))
273 if (curpm && (rx = curpm->op_pmregexp)) {
274 paren = rx->lastparen;
280 if (curpm && (rx = curpm->op_pmregexp)) {
281 if ((s = rx->subbeg) && rx->startp[0]) {
282 i = rx->startp[0] - s;
289 if (curpm && (rx = curpm->op_pmregexp)) {
290 if (rx->subend && (s = rx->endp[0])) {
298 return (STRLEN)ofslen;
300 return (STRLEN)orslen;
303 if (!SvPOK(sv) && SvNIOK(sv))
311 magic_get(SV *sv, MAGIC *mg)
320 switch (*mg->mg_ptr) {
321 case '\001': /* ^A */
322 sv_setsv(sv, bodytarget);
324 case '\004': /* ^D */
325 sv_setiv(sv, (IV)(debug & 32767));
327 case '\005': /* ^E */
330 # include <descrip.h>
331 # include <starlet.h>
333 $DESCRIPTOR(msgdsc,msg);
334 sv_setnv(sv,(double) vaxc$errno);
335 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
336 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
342 if (!(_emx_env & 0x200)) { /* Under DOS */
343 sv_setnv(sv, (double)errno);
344 sv_setpv(sv, errno ? Strerror(errno) : "");
346 if (errno != errno_isOS2)
347 Perl_rc = _syserrno();
348 sv_setnv(sv, (double)Perl_rc);
349 sv_setpv(sv, os2error(Perl_rc));
354 DWORD dwErr = GetLastError();
355 sv_setnv(sv, (double)dwErr);
357 win32_str_os_error(sv, dwErr);
363 sv_setnv(sv, (double)errno);
364 sv_setpv(sv, errno ? Strerror(errno) : "");
368 SvNOK_on(sv); /* what a wonderful hack! */
370 case '\006': /* ^F */
371 sv_setiv(sv, (IV)maxsysfd);
373 case '\010': /* ^H */
374 sv_setiv(sv, (IV)hints);
378 sv_setpv(sv, inplace);
380 sv_setsv(sv, &sv_undef);
382 case '\017': /* ^O */
383 sv_setpv(sv, osname);
385 case '\020': /* ^P */
386 sv_setiv(sv, (IV)perldb);
388 case '\023': /* ^S */
391 if (lex_state != LEX_NOTPARSING)
399 case '\024': /* ^T */
401 sv_setnv(sv, basetime);
403 sv_setiv(sv, (IV)basetime);
406 case '\027': /* ^W */
407 sv_setiv(sv, (IV)dowarn);
409 case '1': case '2': case '3': case '4':
410 case '5': case '6': case '7': case '8': case '9': case '&':
411 if (curpm && (rx = curpm->op_pmregexp)) {
413 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
414 * XXX Does the new way break anything?
416 paren = atoi(mg->mg_ptr);
418 if (paren <= rx->nparens &&
419 (s = rx->startp[paren]) &&
420 (t = rx->endp[paren]))
427 was_tainted = tainted;
432 tainted = was_tainted || RX_MATCH_TAINTED(rx);
437 sv_setsv(sv,&sv_undef);
440 if (curpm && (rx = curpm->op_pmregexp)) {
441 paren = rx->lastparen;
445 sv_setsv(sv,&sv_undef);
448 if (curpm && (rx = curpm->op_pmregexp)) {
449 if ((s = rx->subbeg) && rx->startp[0]) {
450 i = rx->startp[0] - s;
454 sv_setsv(sv,&sv_undef);
457 if (curpm && (rx = curpm->op_pmregexp)) {
458 if (rx->subend && (s = rx->endp[0])) {
463 sv_setsv(sv,&sv_undef);
467 if (GvIO(last_in_gv)) {
468 sv_setiv(sv, (IV)IoLINES(GvIO(last_in_gv)));
475 sv_setiv(sv, (IV)STATUS_CURRENT);
476 #ifdef COMPLEX_STATUS
477 LvTARGOFF(sv) = statusvalue;
478 LvTARGLEN(sv) = statusvalue_vms;
483 s = IoTOP_NAME(GvIOp(defoutgv));
487 sv_setpv(sv,GvENAME(defoutgv));
492 s = IoFMT_NAME(GvIOp(defoutgv));
494 s = GvENAME(defoutgv);
499 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(defoutgv)));
502 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(defoutgv)));
505 sv_setiv(sv, (IV)IoPAGE(GvIOp(defoutgv)));
513 WITH_THR(sv_setiv(sv, (IV)curcop->cop_arybase));
516 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(defoutgv)) & IOf_FLUSH) != 0 );
519 sv_setpvn(sv,ofs,ofslen);
522 sv_setpvn(sv,ors,orslen);
529 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
530 sv_setpv(sv, errno ? Strerror(errno) : "");
533 int saveerrno = errno;
534 sv_setnv(sv, (double)errno);
536 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
539 sv_setpv(sv, errno ? Strerror(errno) : "");
543 SvNOK_on(sv); /* what a wonderful hack! */
546 sv_setiv(sv, (IV)uid);
549 sv_setiv(sv, (IV)euid);
552 sv_setiv(sv, (IV)gid);
553 sv_setpvf(sv, "%Vd", (IV)gid);
556 sv_setiv(sv, (IV)egid);
557 sv_setpvf(sv, "%Vd", (IV)egid);
561 Groups_t gary[NGROUPS];
562 i = getgroups(NGROUPS,gary);
564 sv_catpvf(sv, " %Vd", (IV)gary[i]);
567 SvIOK_on(sv); /* what a wonderful hack! */
575 sv_setsv(sv, thr->errsv);
577 #endif /* USE_THREADS */
583 magic_getuvar(SV *sv, MAGIC *mg)
585 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
587 if (uf && uf->uf_val)
588 (*uf->uf_val)(uf->uf_index, sv);
593 magic_setenv(SV *sv, MAGIC *mg)
604 #ifdef DYNAMIC_ENV_FETCH
605 /* We just undefd an environment var. Is a replacement */
606 /* waiting in the wings? */
609 if ((valp = hv_fetch(GvHVn(envgv), ptr, klen, FALSE)))
610 s = SvPV(*valp, len);
614 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
615 /* And you'll never guess what the dog had */
616 /* in its mouth... */
618 MgTAINTEDDIR_off(mg);
620 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
621 char pathbuf[256], eltbuf[256], *cp, *elt = s;
625 do { /* DCL$PATH may be a search list */
626 while (1) { /* as may dev portion of any element */
627 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
628 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
629 cando_by_name(S_IWUSR,0,elt) ) {
634 if ((cp = strchr(elt, ':')) != Nullch)
636 if (my_trnlnm(elt, eltbuf, j++))
642 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
645 if (s && klen == 4 && strEQ(ptr,"PATH")) {
646 char *strend = s + len;
651 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
654 if (i >= sizeof tmpbuf /* too long -- assume the worst */
656 || (Stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
663 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
669 magic_clearenv(SV *sv, MAGIC *mg)
671 my_setenv(MgPV(mg,na),Nullch);
676 magic_set_all_env(SV *sv, MAGIC *mg)
679 die("Can't make list assignment to %%ENV on this system");
684 magic_clear_all_env(sv,mg);
685 hv_iterinit((HV*)sv);
686 while (entry = hv_iternext((HV*)sv)) {
688 my_setenv(hv_iterkey(entry, &keylen),
689 SvPV(hv_iterval((HV*)sv, entry), na));
697 magic_clear_all_env(SV *sv, MAGIC *mg)
700 die("Can't make list assignment to %%ENV on this system");
703 char *envv = GetEnvironmentStrings();
707 char *end = strchr(cur,'=');
708 if (end && end != cur) {
710 my_setenv(cur,Nullch);
712 cur += strlen(end+1)+1;
714 else if ((len = strlen(cur)))
717 FreeEnvironmentStrings(envv);
721 if (environ == origenviron)
722 New(901, environ, 1, char*);
724 for (i = 0; environ[i]; i++)
725 Safefree(environ[i]);
734 magic_getsig(SV *sv, MAGIC *mg)
737 /* Are we fetching a signal entry? */
738 i = whichsig(MgPV(mg,na));
741 sv_setsv(sv,psig_ptr[i]);
743 Sighandler_t sigstate = rsignal_state(i);
745 /* cache state so we don't fetch it again */
746 if(sigstate == SIG_IGN)
747 sv_setpv(sv,"IGNORE");
749 sv_setsv(sv,&sv_undef);
750 psig_ptr[i] = SvREFCNT_inc(sv);
757 magic_clearsig(SV *sv, MAGIC *mg)
760 /* Are we clearing a signal entry? */
761 i = whichsig(MgPV(mg,na));
764 SvREFCNT_dec(psig_ptr[i]);
768 SvREFCNT_dec(psig_name[i]);
776 magic_setsig(SV *sv, MAGIC *mg)
785 if (strEQ(s,"__DIE__"))
787 else if (strEQ(s,"__WARN__"))
789 else if (strEQ(s,"__PARSE__"))
792 croak("No such hook: %s", s);
800 i = whichsig(s); /* ...no, a brick */
802 if (dowarn || strEQ(s,"ALARM"))
803 warn("No such signal: SIG%s", s);
806 SvREFCNT_dec(psig_name[i]);
807 SvREFCNT_dec(psig_ptr[i]);
808 psig_ptr[i] = SvREFCNT_inc(sv);
809 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
810 psig_name[i] = newSVpv(s, strlen(s));
811 SvREADONLY_on(psig_name[i]);
813 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
815 (void)rsignal(i, sighandlerp);
817 *svp = SvREFCNT_inc(sv);
820 s = SvPV_force(sv,na);
821 if (strEQ(s,"IGNORE")) {
823 (void)rsignal(i, SIG_IGN);
827 else if (strEQ(s,"DEFAULT") || !*s) {
829 (void)rsignal(i, SIG_DFL);
835 * We should warn if HINT_STRICT_REFS, but without
836 * access to a known hint bit in a known OP, we can't
837 * tell whether HINT_STRICT_REFS is in force or not.
839 if (!strchr(s,':') && !strchr(s,'\''))
840 sv_setpv(sv, form("main::%s", s));
842 (void)rsignal(i, sighandlerp);
844 *svp = SvREFCNT_inc(sv);
850 magic_setisa(SV *sv, MAGIC *mg)
855 HV *basefields = Nullhv;
859 static char *FIELDS = "FIELDS";
863 if (mg->mg_type == 'i')
864 return 0; /* Ignore lower-case version of the magic */
866 stash = GvSTASH(mg->mg_obj);
867 svp = AvARRAY((AV*)sv);
869 for (fill = AvFILL((AV*)sv); fill >= 0; fill--, svp++) {
870 HV *basestash = gv_stashsv(*svp, FALSE);
874 warn("No such package \"%_\" in @ISA assignment", *svp);
877 gvp = (GV**)hv_fetch(basestash, FIELDS, 6, FALSE);
878 if (gvp && *gvp && GvHV(*gvp)) {
880 croak("Can't multiply inherit %%FIELDS");
881 basefields = GvHV(*gvp);
888 gv = (GV*)*hv_fetch(stash, FIELDS, 6, TRUE);
890 gv_init(gv, stash, FIELDS, 6, TRUE);
893 if (HvKEYS(GvHV(gv)))
894 croak("Inherited %%FIELDS can't override existing %%FIELDS");
896 hv_iterinit(GvHV(gv));
897 while ((he = hv_iternext(basefields)))
898 hv_store(GvHV(gv), HeKEY(he), HeKLEN(he), HeVAL(he), HeHASH(he));
906 magic_setamagic(SV *sv, MAGIC *mg)
908 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
913 #endif /* OVERLOAD */
916 magic_setnkeys(SV *sv, MAGIC *mg)
919 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
920 LvTARG(sv) = Nullsv; /* Don't allow a ref to reassign this. */
926 magic_methpack(SV *sv, MAGIC *mg, char *meth)
937 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
938 else if (mg->mg_len == HEf_SVKEY)
939 PUSHs((SV*)mg->mg_ptr);
941 else if (mg->mg_type == 'p')
942 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
945 if (perl_call_method(meth, G_SCALAR))
946 sv_setsv(sv, *stack_sp--);
954 magic_getpack(SV *sv, MAGIC *mg)
956 magic_methpack(sv,mg,"FETCH");
958 mg->mg_flags |= MGf_GSKIP;
963 magic_setpack(SV *sv, MAGIC *mg)
972 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
973 else if (mg->mg_len == HEf_SVKEY)
974 PUSHs((SV*)mg->mg_ptr);
976 else if (mg->mg_type == 'p')
977 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
981 perl_call_method("STORE", G_SCALAR|G_DISCARD);
987 magic_clearpack(SV *sv, MAGIC *mg)
989 return magic_methpack(sv,mg,"DELETE");
992 int magic_wipepack(SV *sv, MAGIC *mg)
1000 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1006 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1009 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1020 if (perl_call_method(meth, G_SCALAR))
1021 sv_setsv(key, *stack_sp--);
1029 magic_existspack(SV *sv, MAGIC *mg)
1031 return magic_methpack(sv,mg,"EXISTS");
1035 magic_setdbline(SV *sv, MAGIC *mg)
1045 svp = av_fetch(GvAV(gv),
1046 atoi(MgPV(mg,na)), FALSE);
1047 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1050 warn("Can't break at that line\n");
1055 magic_getarylen(SV *sv, MAGIC *mg)
1058 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + curcop->cop_arybase);
1063 magic_setarylen(SV *sv, MAGIC *mg)
1066 av_fill((AV*)mg->mg_obj, SvIV(sv) - curcop->cop_arybase);
1071 magic_getpos(SV *sv, MAGIC *mg)
1073 SV* lsv = LvTARG(sv);
1075 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1076 mg = mg_find(lsv, 'g');
1077 if (mg && mg->mg_len >= 0) {
1079 sv_setiv(sv, mg->mg_len + curcop->cop_arybase);
1088 magic_setpos(SV *sv, MAGIC *mg)
1090 SV* lsv = LvTARG(sv);
1096 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1097 mg = mg_find(lsv, 'g');
1101 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1102 mg = mg_find(lsv, 'g');
1104 else if (!SvOK(sv)) {
1108 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1110 WITH_THR(pos = SvIV(sv) - curcop->cop_arybase);
1119 mg->mg_flags &= ~MGf_MINMATCH;
1125 magic_getglob(SV *sv, MAGIC *mg)
1127 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1129 gv_efullname3(sv,((GV*)sv), "*");
1133 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1138 magic_setglob(SV *sv, MAGIC *mg)
1146 if (*s == '*' && s[1])
1148 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1153 GvGP(sv) = gp_ref(GvGP(gv));
1158 magic_setsubstr(SV *sv, MAGIC *mg)
1161 char *tmps = SvPV(sv,len);
1162 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1167 magic_gettaint(SV *sv, MAGIC *mg)
1170 TAINT_IF((mg->mg_len & 1) ||
1171 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1176 magic_settaint(SV *sv, MAGIC *mg)
1180 if (localizing == 1)
1193 magic_setvec(SV *sv, MAGIC *mg)
1195 do_vecset(sv); /* XXX slurp this routine */
1200 magic_getdefelem(SV *sv, MAGIC *mg)
1203 if (LvTARGLEN(sv)) {
1205 HV* hv = (HV*)LvTARG(sv);
1206 HE* he = hv_fetch_ent(hv, mg->mg_obj, FALSE, 0);
1211 AV* av = (AV*)LvTARG(sv);
1212 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1213 targ = AvARRAY(av)[LvTARGOFF(sv)];
1215 if (targ && targ != &sv_undef) {
1216 dTHR; /* just for SvREFCNT_dec */
1217 /* somebody else defined it for us */
1218 SvREFCNT_dec(LvTARG(sv));
1219 LvTARG(sv) = SvREFCNT_inc(targ);
1221 SvREFCNT_dec(mg->mg_obj);
1222 mg->mg_obj = Nullsv;
1223 mg->mg_flags &= ~MGf_REFCOUNTED;
1228 sv_setsv(sv, targ ? targ : &sv_undef);
1233 magic_setdefelem(SV *sv, MAGIC *mg)
1238 sv_setsv(LvTARG(sv), sv);
1239 SvSETMAGIC(LvTARG(sv));
1245 magic_freedefelem(SV *sv, MAGIC *mg)
1247 SvREFCNT_dec(LvTARG(sv));
1252 vivify_defelem(SV *sv)
1254 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1258 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1261 HV* hv = (HV*)LvTARG(sv);
1262 HE* he = hv_fetch_ent(hv, mg->mg_obj, TRUE, 0);
1263 if (!he || (value = HeVAL(he)) == &sv_undef)
1264 croak(no_helem, SvPV(mg->mg_obj, na));
1267 AV* av = (AV*)LvTARG(sv);
1268 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1269 LvTARG(sv) = Nullsv; /* array can't be extended */
1271 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1272 if (!svp || (value = *svp) == &sv_undef)
1273 croak(no_aelem, (I32)LvTARGOFF(sv));
1276 (void)SvREFCNT_inc(value);
1277 SvREFCNT_dec(LvTARG(sv));
1280 SvREFCNT_dec(mg->mg_obj);
1281 mg->mg_obj = Nullsv;
1282 mg->mg_flags &= ~MGf_REFCOUNTED;
1286 magic_setmglob(SV *sv, MAGIC *mg)
1294 magic_setbm(SV *sv, MAGIC *mg)
1296 sv_unmagic(sv, 'B');
1302 magic_setfm(SV *sv, MAGIC *mg)
1304 sv_unmagic(sv, 'f');
1310 magic_setuvar(SV *sv, MAGIC *mg)
1312 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1314 if (uf && uf->uf_set)
1315 (*uf->uf_set)(uf->uf_index, sv);
1320 magic_freeregexp(SV *sv, MAGIC *mg)
1322 regexp *re = (regexp *)mg->mg_obj;
1327 #ifdef USE_LOCALE_COLLATE
1329 magic_setcollxfrm(SV *sv, MAGIC *mg)
1332 * René Descartes said "I think not."
1333 * and vanished with a faint plop.
1336 Safefree(mg->mg_ptr);
1342 #endif /* USE_LOCALE_COLLATE */
1345 magic_set(SV *sv, MAGIC *mg)
1351 switch (*mg->mg_ptr) {
1352 case '\001': /* ^A */
1353 sv_setsv(bodytarget, sv);
1355 case '\004': /* ^D */
1356 debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1357 DEBUG_x(dump_all());
1359 case '\005': /* ^E */
1361 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1364 SetLastError( SvIV(sv) );
1366 /* will anyone ever use this? */
1367 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1371 case '\006': /* ^F */
1372 maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1374 case '\010': /* ^H */
1375 hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1381 inplace = savepv(SvPV(sv,na));
1385 case '\017': /* ^O */
1389 osname = savepv(SvPV(sv,na));
1393 case '\020': /* ^P */
1394 perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1396 case '\024': /* ^T */
1398 basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1400 basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1403 case '\027': /* ^W */
1404 dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1408 if (localizing == 1)
1409 save_sptr((SV**)&last_in_gv);
1411 else if (SvOK(sv) && GvIO(last_in_gv))
1412 IoLINES(GvIOp(last_in_gv)) = (long)SvIV(sv);
1415 Safefree(IoTOP_NAME(GvIOp(defoutgv)));
1416 IoTOP_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1417 IoTOP_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1420 Safefree(IoFMT_NAME(GvIOp(defoutgv)));
1421 IoFMT_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1422 IoFMT_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1425 IoPAGE_LEN(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1428 IoLINES_LEFT(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1429 if (IoLINES_LEFT(GvIOp(defoutgv)) < 0L)
1430 IoLINES_LEFT(GvIOp(defoutgv)) = 0L;
1433 IoPAGE(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1437 IO *io = GvIOp(defoutgv);
1438 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1439 IoFLAGS(io) &= ~IOf_FLUSH;
1441 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1442 PerlIO *ofp = IoOFP(io);
1444 (void)PerlIO_flush(ofp);
1445 IoFLAGS(io) |= IOf_FLUSH;
1451 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1452 multiline = (i != 0);
1458 rs = SvREFCNT_inc(nrs);
1463 if (SvOK(sv) || SvGMAGICAL(sv))
1464 ors = savepv(SvPV(sv,orslen));
1473 ofs = savepv(SvPV(sv, ofslen));
1478 ofmt = savepv(SvPV(sv,na));
1481 compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1484 #ifdef COMPLEX_STATUS
1485 if (localizing == 2) {
1486 statusvalue = LvTARGOFF(sv);
1487 statusvalue_vms = LvTARGLEN(sv);
1491 #ifdef VMSISH_STATUS
1493 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1496 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1499 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv),
1500 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1503 uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1505 delaymagic |= DM_RUID;
1506 break; /* don't do magic till later */
1509 (void)setruid((Uid_t)uid);
1512 (void)setreuid((Uid_t)uid, (Uid_t)-1);
1514 #ifdef HAS_SETRESUID
1515 (void)setresuid((Uid_t)uid, (Uid_t)-1, (Uid_t)-1);
1517 if (uid == euid) /* special case $< = $> */
1520 uid = (I32)getuid();
1521 croak("setruid() not implemented");
1526 uid = (I32)getuid();
1527 tainting |= (uid && (euid != uid || egid != gid));
1530 euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1532 delaymagic |= DM_EUID;
1533 break; /* don't do magic till later */
1536 (void)seteuid((Uid_t)euid);
1539 (void)setreuid((Uid_t)-1, (Uid_t)euid);
1541 #ifdef HAS_SETRESUID
1542 (void)setresuid((Uid_t)-1, (Uid_t)euid, (Uid_t)-1);
1544 if (euid == uid) /* special case $> = $< */
1547 euid = (I32)geteuid();
1548 croak("seteuid() not implemented");
1553 euid = (I32)geteuid();
1554 tainting |= (uid && (euid != uid || egid != gid));
1557 gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1559 delaymagic |= DM_RGID;
1560 break; /* don't do magic till later */
1563 (void)setrgid((Gid_t)gid);
1566 (void)setregid((Gid_t)gid, (Gid_t)-1);
1568 #ifdef HAS_SETRESGID
1569 (void)setresgid((Gid_t)gid, (Gid_t)-1, (Gid_t) 1);
1571 if (gid == egid) /* special case $( = $) */
1574 gid = (I32)getgid();
1575 croak("setrgid() not implemented");
1580 gid = (I32)getgid();
1581 tainting |= (uid && (euid != uid || egid != gid));
1584 #ifdef HAS_SETGROUPS
1586 char *p = SvPV(sv, na);
1587 Groups_t gary[NGROUPS];
1589 SET_NUMERIC_STANDARD();
1592 egid = I_V(atof(p));
1593 for (i = 0; i < NGROUPS; ++i) {
1594 while (*p && !isSPACE(*p))
1600 gary[i] = I_V(atof(p));
1603 (void)setgroups(i, gary);
1605 #else /* HAS_SETGROUPS */
1606 egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1607 #endif /* HAS_SETGROUPS */
1609 delaymagic |= DM_EGID;
1610 break; /* don't do magic till later */
1613 (void)setegid((Gid_t)egid);
1616 (void)setregid((Gid_t)-1, (Gid_t)egid);
1618 #ifdef HAS_SETRESGID
1619 (void)setresgid((Gid_t)-1, (Gid_t)egid, (Gid_t)-1);
1621 if (egid == gid) /* special case $) = $( */
1624 egid = (I32)getegid();
1625 croak("setegid() not implemented");
1630 egid = (I32)getegid();
1631 tainting |= (uid && (euid != uid || egid != gid));
1634 chopset = SvPV_force(sv,na);
1640 /* See if all the arguments are contiguous in memory */
1641 for (i = 1; i < origargc; i++) {
1642 if (origargv[i] == s + 1
1644 || origargv[i] == s + 2
1647 s += strlen(++s); /* this one is ok too */
1651 /* can grab env area too? */
1652 if (origenviron && (origenviron[0] == s + 1
1654 || (origenviron[0] == s + 9 && (s += 8))
1657 my_setenv("NoNe SuCh", Nullch);
1658 /* force copy of environment */
1659 for (i = 0; origenviron[i]; i++)
1660 if (origenviron[i] == s + 1)
1665 origalen = s - origargv[0];
1667 s = SvPV_force(sv,len);
1669 if (i >= origalen) {
1671 /* don't allow system to limit $0 seen by script */
1672 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1673 Copy(s, origargv[0], i, char);
1678 Copy(s, origargv[0], i, char);
1681 while (++i < origalen)
1684 for (i = 1; i < origargc; i++)
1685 origargv[i] = Nullch;
1690 sv_setsv(thr->errsv, sv);
1692 #endif /* USE_THREADS */
1699 magic_mutexfree(SV *sv, MAGIC *mg)
1702 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1703 (unsigned long)thr, (unsigned long)sv);)
1705 croak("panic: magic_mutexfree");
1706 MUTEX_DESTROY(MgMUTEXP(mg));
1707 COND_DESTROY(MgCONDP(mg));
1711 #endif /* USE_THREADS */
1716 register char **sigv;
1718 for (sigv = sig_name+1; *sigv; sigv++)
1719 if (strEQ(sig,*sigv))
1720 return sig_num[sigv - sig_name];
1722 if (strEQ(sig,"CHLD"))
1726 if (strEQ(sig,"CLD"))
1735 unwind_handler_stack(void *p)
1738 U32 flags = *(U32*)p;
1741 savestack_ix -= 5; /* Unprotect save in progress. */
1742 /* cxstack_ix-- Not needed, die already unwound it. */
1744 SvREFCNT_dec(sig_sv);
1758 I32 o_save_i = savestack_ix, type;
1762 if (savestack_ix + 15 <= savestack_max)
1764 if (cxstack_ix < cxstack_max - 2)
1766 if (markstack_ptr < markstack_max - 2)
1768 if (retstack_ix < retstack_max - 2)
1770 if (scopestack_ix < scopestack_max - 3)
1773 if (flags & 2) { /* POPBLOCK may decrease cxstack too early. */
1774 cxstack_ix++; /* Protect from overwrite. */
1775 cx = &cxstack[cxstack_ix];
1776 type = cx->cx_type; /* Can be during partial write. */
1777 cx->cx_type = CXt_NULL; /* Make it safe for unwind. */
1780 die("Signal SIG%s received, but no signal handler set.\n",
1783 /* Max number of items pushed there is 3*n or 4. We cannot fix
1784 infinity, so we fix 4 (in fact 5): */
1786 savestack_ix += 5; /* Protect save in progress. */
1787 o_save_i = savestack_ix;
1788 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
1791 markstack_ptr++; /* Protect mark. */
1794 retstack[retstack_ix] = NULL;
1798 /* sv_2cv is too complicated, try a simpler variant first: */
1799 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
1800 || SvTYPE(cv) != SVt_PVCV)
1801 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1803 if (!cv || !CvROOT(cv)) {
1805 warn("SIG%s handler \"%s\" not defined.\n",
1806 sig_name[sig], (gv ? GvENAME(gv)
1813 oldstack = curstack;
1814 if (curstack != signalstack)
1815 AvFILL(signalstack) = 0;
1816 SWITCHSTACK(curstack, signalstack);
1818 if(psig_name[sig]) {
1819 sv = SvREFCNT_inc(psig_name[sig]);
1823 sv = sv_newmortal();
1824 sv_setpv(sv,sig_name[sig]);
1830 perl_call_sv((SV*)cv, G_DISCARD);
1832 SWITCHSTACK(signalstack, oldstack);
1835 savestack_ix -= 8; /* Unprotect save in progress. */
1837 cxstack[cxstack_ix].cx_type = type;
1848 op = myop; /* Apparently not needed... */
1850 Sv = tSv; /* Restore global temporaries. */