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);
77 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
78 MGVTBL* vtbl = mg->mg_virtual;
80 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
84 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
102 while ((mg = *mgp) != 0) {
103 MGVTBL* vtbl = mg->mg_virtual;
104 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
105 (*vtbl->svt_get)(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))
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 */
132 save_magic(&mgs, sv);
134 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
135 MGVTBL* vtbl = mg->mg_virtual;
136 nextmg = mg->mg_moremagic; /* it may delete itself */
137 if (mg->mg_flags & MGf_GSKIP) {
138 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
141 if (vtbl && vtbl->svt_set)
142 (*vtbl->svt_set)(sv, mg);
156 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
157 MGVTBL* vtbl = mg->mg_virtual;
158 if (vtbl && vtbl->svt_len) {
162 save_magic(&mgs, sv);
163 /* omit MGf_GSKIP -- not changed here */
164 len = (*vtbl->svt_len)(sv, mg);
170 junk = SvPV(sv, len);
181 save_magic(&mgs, sv);
183 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
184 MGVTBL* vtbl = mg->mg_virtual;
185 /* omit GSKIP -- never set here */
187 if (vtbl && vtbl->svt_clear)
188 (*vtbl->svt_clear)(sv, mg);
196 mg_find(SV *sv, int type)
199 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
200 if (mg->mg_type == type)
207 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
211 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
212 if (isUPPER(mg->mg_type)) {
213 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
225 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
226 MGVTBL* vtbl = mg->mg_virtual;
227 moremagic = mg->mg_moremagic;
228 if (vtbl && vtbl->svt_free)
229 (*vtbl->svt_free)(sv, mg);
230 if (mg->mg_ptr && mg->mg_type != 'g')
232 Safefree(mg->mg_ptr);
233 else if (mg->mg_len == HEf_SVKEY)
234 SvREFCNT_dec((SV*)mg->mg_ptr);
235 if (mg->mg_flags & MGf_REFCOUNTED)
236 SvREFCNT_dec(mg->mg_obj);
243 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
248 magic_len(SV *sv, MAGIC *mg)
257 switch (*mg->mg_ptr) {
258 case '1': case '2': case '3': case '4':
259 case '5': case '6': case '7': case '8': case '9': case '&':
260 if (curpm && (rx = curpm->op_pmregexp)) {
261 paren = atoi(mg->mg_ptr);
263 if (paren <= rx->nparens &&
264 (s = rx->startp[paren]) &&
265 (t = rx->endp[paren]))
274 if (curpm && (rx = curpm->op_pmregexp)) {
275 paren = rx->lastparen;
281 if (curpm && (rx = curpm->op_pmregexp)) {
282 if ((s = rx->subbeg) && rx->startp[0]) {
283 i = rx->startp[0] - s;
290 if (curpm && (rx = curpm->op_pmregexp)) {
291 if (rx->subend && (s = rx->endp[0])) {
299 return (STRLEN)ofslen;
301 return (STRLEN)orslen;
304 if (!SvPOK(sv) && SvNIOK(sv))
312 magic_get(SV *sv, MAGIC *mg)
321 switch (*mg->mg_ptr) {
322 case '\001': /* ^A */
323 sv_setsv(sv, bodytarget);
325 case '\004': /* ^D */
326 sv_setiv(sv, (IV)(debug & 32767));
328 case '\005': /* ^E */
331 # include <descrip.h>
332 # include <starlet.h>
334 $DESCRIPTOR(msgdsc,msg);
335 sv_setnv(sv,(double) vaxc$errno);
336 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
337 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
343 if (!(_emx_env & 0x200)) { /* Under DOS */
344 sv_setnv(sv, (double)errno);
345 sv_setpv(sv, errno ? Strerror(errno) : "");
347 if (errno != errno_isOS2)
348 Perl_rc = _syserrno();
349 sv_setnv(sv, (double)Perl_rc);
350 sv_setpv(sv, os2error(Perl_rc));
353 sv_setnv(sv, (double)errno);
354 sv_setpv(sv, errno ? Strerror(errno) : "");
357 SvNOK_on(sv); /* what a wonderful hack! */
359 case '\006': /* ^F */
360 sv_setiv(sv, (IV)maxsysfd);
362 case '\010': /* ^H */
363 sv_setiv(sv, (IV)hints);
367 sv_setpv(sv, inplace);
369 sv_setsv(sv, &sv_undef);
371 case '\017': /* ^O */
372 sv_setpv(sv, osname);
374 case '\020': /* ^P */
375 sv_setiv(sv, (IV)perldb);
377 case '\023': /* ^S */
380 if (lex_state != LEX_NOTPARSING)
388 case '\024': /* ^T */
390 sv_setnv(sv, basetime);
392 sv_setiv(sv, (IV)basetime);
395 case '\027': /* ^W */
396 sv_setiv(sv, (IV)dowarn);
398 case '1': case '2': case '3': case '4':
399 case '5': case '6': case '7': case '8': case '9': case '&':
400 if (curpm && (rx = curpm->op_pmregexp)) {
402 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
403 * XXX Does the new way break anything?
405 paren = atoi(mg->mg_ptr);
407 if (paren <= rx->nparens &&
408 (s = rx->startp[paren]) &&
409 (t = rx->endp[paren]))
416 was_tainted = tainted;
421 tainted = was_tainted || rx->exec_tainted;
426 sv_setsv(sv,&sv_undef);
429 if (curpm && (rx = curpm->op_pmregexp)) {
430 paren = rx->lastparen;
434 sv_setsv(sv,&sv_undef);
437 if (curpm && (rx = curpm->op_pmregexp)) {
438 if ((s = rx->subbeg) && rx->startp[0]) {
439 i = rx->startp[0] - s;
443 sv_setsv(sv,&sv_undef);
446 if (curpm && (rx = curpm->op_pmregexp)) {
447 if (rx->subend && (s = rx->endp[0])) {
452 sv_setsv(sv,&sv_undef);
456 if (GvIO(last_in_gv)) {
457 sv_setiv(sv, (IV)IoLINES(GvIO(last_in_gv)));
464 sv_setiv(sv, (IV)STATUS_CURRENT);
465 #ifdef COMPLEX_STATUS
466 LvTARGOFF(sv) = statusvalue;
467 LvTARGLEN(sv) = statusvalue_vms;
472 s = IoTOP_NAME(GvIOp(defoutgv));
476 sv_setpv(sv,GvENAME(defoutgv));
481 s = IoFMT_NAME(GvIOp(defoutgv));
483 s = GvENAME(defoutgv);
488 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(defoutgv)));
491 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(defoutgv)));
494 sv_setiv(sv, (IV)IoPAGE(GvIOp(defoutgv)));
502 WITH_THR(sv_setiv(sv, (IV)curcop->cop_arybase));
505 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(defoutgv)) & IOf_FLUSH) != 0 );
508 sv_setpvn(sv,ofs,ofslen);
511 sv_setpvn(sv,ors,orslen);
518 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
519 sv_setpv(sv, errno ? Strerror(errno) : "");
522 int saveerrno = errno;
523 sv_setnv(sv, (double)errno);
525 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
528 sv_setpv(sv, errno ? Strerror(errno) : "");
532 SvNOK_on(sv); /* what a wonderful hack! */
535 sv_setiv(sv, (IV)uid);
538 sv_setiv(sv, (IV)euid);
541 sv_setiv(sv, (IV)gid);
542 sv_setpvf(sv, "%Vd", (IV)gid);
545 sv_setiv(sv, (IV)egid);
546 sv_setpvf(sv, "%Vd", (IV)egid);
550 Groups_t gary[NGROUPS];
551 i = getgroups(NGROUPS,gary);
553 sv_catpvf(sv, " %Vd", (IV)gary[i]);
556 SvIOK_on(sv); /* what a wonderful hack! */
564 sv_setsv(sv, thr->errsv);
566 #endif /* USE_THREADS */
572 magic_getuvar(SV *sv, MAGIC *mg)
574 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
576 if (uf && uf->uf_val)
577 (*uf->uf_val)(uf->uf_index, sv);
582 magic_setenv(SV *sv, MAGIC *mg)
593 #ifdef DYNAMIC_ENV_FETCH
594 /* We just undefd an environment var. Is a replacement */
595 /* waiting in the wings? */
598 if ((valp = hv_fetch(GvHVn(envgv), ptr, klen, FALSE)))
599 s = SvPV(*valp, len);
603 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32)
604 /* And you'll never guess what the dog had */
605 /* in its mouth... */
607 MgTAINTEDDIR_off(mg);
609 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
610 char pathbuf[256], eltbuf[256], *cp, *elt = s;
614 do { /* DCL$PATH may be a search list */
615 while (1) { /* as may dev portion of any element */
616 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
617 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
618 cando_by_name(S_IWUSR,0,elt) ) {
623 if ((cp = strchr(elt, ':')) != Nullch)
625 if (my_trnlnm(elt, eltbuf, j++))
631 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
634 if (s && klen == 4 && strEQ(ptr,"PATH")) {
635 char *strend = s + len;
640 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
643 if (i >= sizeof tmpbuf /* too long -- assume the worst */
645 || (Stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
652 #endif /* neither OS2 nor AMIGAOS nor WIN32 */
658 magic_clearenv(SV *sv, MAGIC *mg)
660 my_setenv(MgPV(mg,na),Nullch);
665 magic_set_all_env(SV *sv, MAGIC *mg)
668 die("Can't make list assignment to %%ENV on this system");
673 magic_clear_all_env(sv,mg);
674 hv_iterinit((HV*)sv);
675 while (entry = hv_iternext((HV*)sv)) {
677 my_setenv(hv_iterkey(entry, &keylen),
678 SvPV(hv_iterval((HV*)sv, entry), na));
686 magic_clear_all_env(SV *sv, MAGIC *mg)
689 die("Can't make list assignment to %%ENV on this system");
692 char *envv = GetEnvironmentStrings();
696 char *end = strchr(cur,'=');
697 if (end && end != cur) {
699 my_setenv(cur,Nullch);
701 cur += strlen(end+1)+1;
703 else if ((len = strlen(cur)))
706 FreeEnvironmentStrings(envv);
710 if (environ == origenviron)
711 New(901, environ, 1, char*);
713 for (i = 0; environ[i]; i++)
714 Safefree(environ[i]);
723 magic_getsig(SV *sv, MAGIC *mg)
726 /* Are we fetching a signal entry? */
727 i = whichsig(MgPV(mg,na));
730 sv_setsv(sv,psig_ptr[i]);
732 Sighandler_t sigstate = rsignal_state(i);
734 /* cache state so we don't fetch it again */
735 if(sigstate == SIG_IGN)
736 sv_setpv(sv,"IGNORE");
738 sv_setsv(sv,&sv_undef);
739 psig_ptr[i] = SvREFCNT_inc(sv);
746 magic_clearsig(SV *sv, MAGIC *mg)
749 /* Are we clearing a signal entry? */
750 i = whichsig(MgPV(mg,na));
753 SvREFCNT_dec(psig_ptr[i]);
757 SvREFCNT_dec(psig_name[i]);
765 magic_setsig(SV *sv, MAGIC *mg)
774 if (strEQ(s,"__DIE__"))
776 else if (strEQ(s,"__WARN__"))
778 else if (strEQ(s,"__PARSE__"))
781 croak("No such hook: %s", s);
789 i = whichsig(s); /* ...no, a brick */
791 if (dowarn || strEQ(s,"ALARM"))
792 warn("No such signal: SIG%s", s);
795 SvREFCNT_dec(psig_name[i]);
796 SvREFCNT_dec(psig_ptr[i]);
797 psig_ptr[i] = SvREFCNT_inc(sv);
798 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
799 psig_name[i] = newSVpv(s, strlen(s));
800 SvREADONLY_on(psig_name[i]);
802 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
804 (void)rsignal(i, sighandlerp);
806 *svp = SvREFCNT_inc(sv);
809 s = SvPV_force(sv,na);
810 if (strEQ(s,"IGNORE")) {
812 (void)rsignal(i, SIG_IGN);
816 else if (strEQ(s,"DEFAULT") || !*s) {
818 (void)rsignal(i, SIG_DFL);
824 * We should warn if HINT_STRICT_REFS, but without
825 * access to a known hint bit in a known OP, we can't
826 * tell whether HINT_STRICT_REFS is in force or not.
828 if (!strchr(s,':') && !strchr(s,'\''))
829 sv_setpv(sv, form("main::%s", s));
831 (void)rsignal(i, sighandlerp);
833 *svp = SvREFCNT_inc(sv);
839 magic_setisa(SV *sv, MAGIC *mg)
848 magic_setamagic(SV *sv, MAGIC *mg)
850 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
855 #endif /* OVERLOAD */
858 magic_setnkeys(SV *sv, MAGIC *mg)
861 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
862 LvTARG(sv) = Nullsv; /* Don't allow a ref to reassign this. */
868 magic_methpack(SV *sv, MAGIC *mg, char *meth)
879 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
880 else if (mg->mg_len == HEf_SVKEY)
881 PUSHs((SV*)mg->mg_ptr);
883 else if (mg->mg_type == 'p')
884 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
887 if (perl_call_method(meth, G_SCALAR))
888 sv_setsv(sv, *stack_sp--);
896 magic_getpack(SV *sv, MAGIC *mg)
898 magic_methpack(sv,mg,"FETCH");
900 mg->mg_flags |= MGf_GSKIP;
905 magic_setpack(SV *sv, MAGIC *mg)
914 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
915 else if (mg->mg_len == HEf_SVKEY)
916 PUSHs((SV*)mg->mg_ptr);
918 else if (mg->mg_type == 'p')
919 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
923 perl_call_method("STORE", G_SCALAR|G_DISCARD);
929 magic_clearpack(SV *sv, MAGIC *mg)
931 return magic_methpack(sv,mg,"DELETE");
934 int magic_wipepack(SV *sv, MAGIC *mg)
942 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
948 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
951 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
962 if (perl_call_method(meth, G_SCALAR))
963 sv_setsv(key, *stack_sp--);
971 magic_existspack(SV *sv, MAGIC *mg)
973 return magic_methpack(sv,mg,"EXISTS");
977 magic_setdbline(SV *sv, MAGIC *mg)
987 svp = av_fetch(GvAV(gv),
988 atoi(MgPV(mg,na)), FALSE);
989 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
992 warn("Can't break at that line\n");
997 magic_getarylen(SV *sv, MAGIC *mg)
1000 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + curcop->cop_arybase);
1005 magic_setarylen(SV *sv, MAGIC *mg)
1008 av_fill((AV*)mg->mg_obj, SvIV(sv) - curcop->cop_arybase);
1013 magic_getpos(SV *sv, MAGIC *mg)
1015 SV* lsv = LvTARG(sv);
1017 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1018 mg = mg_find(lsv, 'g');
1019 if (mg && mg->mg_len >= 0) {
1021 sv_setiv(sv, mg->mg_len + curcop->cop_arybase);
1030 magic_setpos(SV *sv, MAGIC *mg)
1032 SV* lsv = LvTARG(sv);
1038 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1039 mg = mg_find(lsv, 'g');
1043 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1044 mg = mg_find(lsv, 'g');
1046 else if (!SvOK(sv)) {
1050 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1052 WITH_THR(pos = SvIV(sv) - curcop->cop_arybase);
1061 mg->mg_flags &= ~MGf_MINMATCH;
1067 magic_getglob(SV *sv, MAGIC *mg)
1069 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1071 gv_efullname3(sv,((GV*)sv), "*");
1075 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1080 magic_setglob(SV *sv, MAGIC *mg)
1088 if (*s == '*' && s[1])
1090 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1095 GvGP(sv) = gp_ref(GvGP(gv));
1100 magic_setsubstr(SV *sv, MAGIC *mg)
1103 char *tmps = SvPV(sv,len);
1104 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1109 magic_gettaint(SV *sv, MAGIC *mg)
1112 TAINT_IF((mg->mg_len & 1) ||
1113 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1118 magic_settaint(SV *sv, MAGIC *mg)
1122 if (localizing == 1)
1135 magic_setvec(SV *sv, MAGIC *mg)
1137 do_vecset(sv); /* XXX slurp this routine */
1142 magic_getdefelem(SV *sv, MAGIC *mg)
1145 if (LvTARGLEN(sv)) {
1147 HV* hv = (HV*)LvTARG(sv);
1148 HE* he = hv_fetch_ent(hv, mg->mg_obj, FALSE, 0);
1153 AV* av = (AV*)LvTARG(sv);
1154 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1155 targ = AvARRAY(av)[LvTARGOFF(sv)];
1157 if (targ && targ != &sv_undef) {
1158 dTHR; /* just for SvREFCNT_dec */
1159 /* somebody else defined it for us */
1160 SvREFCNT_dec(LvTARG(sv));
1161 LvTARG(sv) = SvREFCNT_inc(targ);
1163 SvREFCNT_dec(mg->mg_obj);
1164 mg->mg_obj = Nullsv;
1165 mg->mg_flags &= ~MGf_REFCOUNTED;
1170 sv_setsv(sv, targ ? targ : &sv_undef);
1175 magic_setdefelem(SV *sv, MAGIC *mg)
1180 sv_setsv(LvTARG(sv), sv);
1181 SvSETMAGIC(LvTARG(sv));
1187 magic_freedefelem(SV *sv, MAGIC *mg)
1189 SvREFCNT_dec(LvTARG(sv));
1194 vivify_defelem(SV *sv)
1196 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1200 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1203 HV* hv = (HV*)LvTARG(sv);
1204 HE* he = hv_fetch_ent(hv, mg->mg_obj, TRUE, 0);
1205 if (!he || (value = HeVAL(he)) == &sv_undef)
1206 croak(no_helem, SvPV(mg->mg_obj, na));
1209 AV* av = (AV*)LvTARG(sv);
1210 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1211 LvTARG(sv) = Nullsv; /* array can't be extended */
1213 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1214 if (!svp || (value = *svp) == &sv_undef)
1215 croak(no_aelem, (I32)LvTARGOFF(sv));
1218 (void)SvREFCNT_inc(value);
1219 SvREFCNT_dec(LvTARG(sv));
1222 SvREFCNT_dec(mg->mg_obj);
1223 mg->mg_obj = Nullsv;
1224 mg->mg_flags &= ~MGf_REFCOUNTED;
1228 magic_setmglob(SV *sv, MAGIC *mg)
1236 magic_setbm(SV *sv, MAGIC *mg)
1238 sv_unmagic(sv, 'B');
1244 magic_setfm(SV *sv, MAGIC *mg)
1246 sv_unmagic(sv, 'f');
1252 magic_setuvar(SV *sv, MAGIC *mg)
1254 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1256 if (uf && uf->uf_set)
1257 (*uf->uf_set)(uf->uf_index, sv);
1261 #ifdef USE_LOCALE_COLLATE
1263 magic_setcollxfrm(SV *sv, MAGIC *mg)
1266 * René Descartes said "I think not."
1267 * and vanished with a faint plop.
1270 Safefree(mg->mg_ptr);
1276 #endif /* USE_LOCALE_COLLATE */
1279 magic_set(SV *sv, MAGIC *mg)
1285 switch (*mg->mg_ptr) {
1286 case '\001': /* ^A */
1287 sv_setsv(bodytarget, sv);
1289 case '\004': /* ^D */
1290 debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1291 DEBUG_x(dump_all());
1293 case '\005': /* ^E */
1295 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1297 /* will anyone ever use this? */
1298 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1301 case '\006': /* ^F */
1302 maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1304 case '\010': /* ^H */
1305 hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1311 inplace = savepv(SvPV(sv,na));
1315 case '\017': /* ^O */
1319 osname = savepv(SvPV(sv,na));
1323 case '\020': /* ^P */
1324 perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1326 case '\024': /* ^T */
1328 basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1330 basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1333 case '\027': /* ^W */
1334 dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1338 if (localizing == 1)
1339 save_sptr((SV**)&last_in_gv);
1341 else if (SvOK(sv) && GvIO(last_in_gv))
1342 IoLINES(GvIOp(last_in_gv)) = (long)SvIV(sv);
1345 Safefree(IoTOP_NAME(GvIOp(defoutgv)));
1346 IoTOP_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1347 IoTOP_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1350 Safefree(IoFMT_NAME(GvIOp(defoutgv)));
1351 IoFMT_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1352 IoFMT_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1355 IoPAGE_LEN(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1358 IoLINES_LEFT(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1359 if (IoLINES_LEFT(GvIOp(defoutgv)) < 0L)
1360 IoLINES_LEFT(GvIOp(defoutgv)) = 0L;
1363 IoPAGE(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1367 IO *io = GvIOp(defoutgv);
1368 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1369 IoFLAGS(io) &= ~IOf_FLUSH;
1371 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1372 PerlIO *ofp = IoOFP(io);
1374 (void)PerlIO_flush(ofp);
1375 IoFLAGS(io) |= IOf_FLUSH;
1381 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1382 multiline = (i != 0);
1388 rs = SvREFCNT_inc(nrs);
1393 if (SvOK(sv) || SvGMAGICAL(sv))
1394 ors = savepv(SvPV(sv,orslen));
1403 ofs = savepv(SvPV(sv, ofslen));
1408 ofmt = savepv(SvPV(sv,na));
1411 compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1414 #ifdef COMPLEX_STATUS
1415 if (localizing == 2) {
1416 statusvalue = LvTARGOFF(sv);
1417 statusvalue_vms = LvTARGLEN(sv);
1421 #ifdef VMSISH_STATUS
1423 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1426 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1429 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv),
1430 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1433 uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1435 delaymagic |= DM_RUID;
1436 break; /* don't do magic till later */
1439 (void)setruid((Uid_t)uid);
1442 (void)setreuid((Uid_t)uid, (Uid_t)-1);
1444 #ifdef HAS_SETRESUID
1445 (void)setresuid((Uid_t)uid, (Uid_t)-1, (Uid_t)-1);
1447 if (uid == euid) /* special case $< = $> */
1450 uid = (I32)getuid();
1451 croak("setruid() not implemented");
1456 uid = (I32)getuid();
1457 tainting |= (uid && (euid != uid || egid != gid));
1460 euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1462 delaymagic |= DM_EUID;
1463 break; /* don't do magic till later */
1466 (void)seteuid((Uid_t)euid);
1469 (void)setreuid((Uid_t)-1, (Uid_t)euid);
1471 #ifdef HAS_SETRESUID
1472 (void)setresuid((Uid_t)-1, (Uid_t)euid, (Uid_t)-1);
1474 if (euid == uid) /* special case $> = $< */
1477 euid = (I32)geteuid();
1478 croak("seteuid() not implemented");
1483 euid = (I32)geteuid();
1484 tainting |= (uid && (euid != uid || egid != gid));
1487 gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1489 delaymagic |= DM_RGID;
1490 break; /* don't do magic till later */
1493 (void)setrgid((Gid_t)gid);
1496 (void)setregid((Gid_t)gid, (Gid_t)-1);
1498 #ifdef HAS_SETRESGID
1499 (void)setresgid((Gid_t)gid, (Gid_t)-1, (Gid_t) 1);
1501 if (gid == egid) /* special case $( = $) */
1504 gid = (I32)getgid();
1505 croak("setrgid() not implemented");
1510 gid = (I32)getgid();
1511 tainting |= (uid && (euid != uid || egid != gid));
1514 #ifdef HAS_SETGROUPS
1516 char *p = SvPV(sv, na);
1517 Groups_t gary[NGROUPS];
1519 SET_NUMERIC_STANDARD();
1522 egid = I_V(atof(p));
1523 for (i = 0; i < NGROUPS; ++i) {
1524 while (*p && !isSPACE(*p))
1530 gary[i] = I_V(atof(p));
1533 (void)setgroups(i, gary);
1535 #else /* HAS_SETGROUPS */
1536 egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1537 #endif /* HAS_SETGROUPS */
1539 delaymagic |= DM_EGID;
1540 break; /* don't do magic till later */
1543 (void)setegid((Gid_t)egid);
1546 (void)setregid((Gid_t)-1, (Gid_t)egid);
1548 #ifdef HAS_SETRESGID
1549 (void)setresgid((Gid_t)-1, (Gid_t)egid, (Gid_t)-1);
1551 if (egid == gid) /* special case $) = $( */
1554 egid = (I32)getegid();
1555 croak("setegid() not implemented");
1560 egid = (I32)getegid();
1561 tainting |= (uid && (euid != uid || egid != gid));
1564 chopset = SvPV_force(sv,na);
1570 /* See if all the arguments are contiguous in memory */
1571 for (i = 1; i < origargc; i++) {
1572 if (origargv[i] == s + 1
1574 || origargv[i] == s + 2
1577 s += strlen(++s); /* this one is ok too */
1581 /* can grab env area too? */
1582 if (origenviron && (origenviron[0] == s + 1
1584 || (origenviron[0] == s + 9 && (s += 8))
1587 my_setenv("NoNe SuCh", Nullch);
1588 /* force copy of environment */
1589 for (i = 0; origenviron[i]; i++)
1590 if (origenviron[i] == s + 1)
1595 origalen = s - origargv[0];
1597 s = SvPV_force(sv,len);
1599 if (i >= origalen) {
1601 /* don't allow system to limit $0 seen by script */
1602 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1603 Copy(s, origargv[0], i, char);
1608 Copy(s, origargv[0], i, char);
1611 while (++i < origalen)
1614 for (i = 1; i < origargc; i++)
1615 origargv[i] = Nullch;
1620 sv_setsv(thr->errsv, sv);
1622 #endif /* USE_THREADS */
1629 magic_mutexfree(SV *sv, MAGIC *mg)
1632 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1633 (unsigned long)thr, (unsigned long)sv);)
1635 croak("panic: magic_mutexfree");
1636 MUTEX_DESTROY(MgMUTEXP(mg));
1637 COND_DESTROY(MgCONDP(mg));
1641 #endif /* USE_THREADS */
1646 register char **sigv;
1648 for (sigv = sig_name+1; *sigv; sigv++)
1649 if (strEQ(sig,*sigv))
1650 return sig_num[sigv - sig_name];
1652 if (strEQ(sig,"CHLD"))
1656 if (strEQ(sig,"CLD"))
1665 unwind_handler_stack(void *p)
1668 U32 flags = *(U32*)p;
1671 savestack_ix -= 5; /* Unprotect save in progress. */
1672 /* cxstack_ix-- Not needed, die already unwound it. */
1674 SvREFCNT_dec(sig_sv);
1688 I32 o_save_i = savestack_ix, type;
1692 if (savestack_ix + 15 <= savestack_max)
1694 if (cxstack_ix < cxstack_max - 2)
1696 if (markstack_ptr < markstack_max - 2)
1698 if (retstack_ix < retstack_max - 2)
1700 if (scopestack_ix < scopestack_max - 3)
1703 if (flags & 2) { /* POPBLOCK may decrease cxstack too early. */
1704 cxstack_ix++; /* Protect from overwrite. */
1705 cx = &cxstack[cxstack_ix];
1706 type = cx->cx_type; /* Can be during partial write. */
1707 cx->cx_type = CXt_NULL; /* Make it safe for unwind. */
1710 die("Signal SIG%s received, but no signal handler set.\n",
1713 /* Max number of items pushed there is 3*n or 4. We cannot fix
1714 infinity, so we fix 4 (in fact 5): */
1716 savestack_ix += 5; /* Protect save in progress. */
1717 o_save_i = savestack_ix;
1718 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
1721 markstack_ptr++; /* Protect mark. */
1724 retstack[retstack_ix] = NULL;
1728 /* sv_2cv is too complicated, try a simpler variant first: */
1729 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
1730 || SvTYPE(cv) != SVt_PVCV)
1731 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1733 if (!cv || !CvROOT(cv)) {
1735 warn("SIG%s handler \"%s\" not defined.\n",
1736 sig_name[sig], GvENAME(gv) );
1740 oldstack = curstack;
1741 if (curstack != signalstack)
1742 AvFILL(signalstack) = 0;
1743 SWITCHSTACK(curstack, signalstack);
1745 if(psig_name[sig]) {
1746 sv = SvREFCNT_inc(psig_name[sig]);
1750 sv = sv_newmortal();
1751 sv_setpv(sv,sig_name[sig]);
1757 perl_call_sv((SV*)cv, G_DISCARD);
1759 SWITCHSTACK(signalstack, oldstack);
1761 savestack_ix -= 8; /* Unprotect save in progress. */
1763 cxstack[cxstack_ix].cx_type = type;
1774 op = myop; /* Apparently not needed... */
1776 Sv = tSv; /* Restore global temporaries. */