3 * Copyright (c) 1991-1994, 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. */
30 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
37 typedef struct magic_state MGS;
39 static void restore_magic _((void *p));
47 assert(SvMAGICAL(sv));
49 mgs = (MGS*)safemalloc(sizeof(MGS));
51 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
52 SAVEDESTRUCTOR(restore_magic, mgs);
56 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
68 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
71 SvFLAGS(sv) |= mgs->mgs_flags;
75 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
87 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
88 MGVTBL* vtbl = mg->mg_virtual;
90 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
94 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
110 mgs = save_magic(sv);
113 while ((mg = *mgp) != 0) {
114 MGVTBL* vtbl = mg->mg_virtual;
115 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
116 (*vtbl->svt_get)(sv, mg);
117 /* Ignore this magic if it's been deleted */
118 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) && (mg->mg_flags & MGf_GSKIP))
121 /* Advance to next magic (complicated by possible deletion) */
122 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
123 mgp = &mg->mg_moremagic;
127 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
143 mgs = save_magic(sv);
145 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
146 MGVTBL* vtbl = mg->mg_virtual;
147 nextmg = mg->mg_moremagic; /* it may delete itself */
148 if (mg->mg_flags & MGf_GSKIP) {
149 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
152 if (vtbl && vtbl->svt_set)
153 (*vtbl->svt_set)(sv, mg);
168 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
169 MGVTBL* vtbl = mg->mg_virtual;
170 if (vtbl && vtbl->svt_len) {
173 /* omit MGf_GSKIP -- not changed here */
174 len = (*vtbl->svt_len)(sv, mg);
180 junk = SvPV(sv, len);
193 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
194 MGVTBL* vtbl = mg->mg_virtual;
195 /* omit GSKIP -- never set here */
197 if (vtbl && vtbl->svt_clear)
198 (*vtbl->svt_clear)(sv, mg);
211 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
212 if (mg->mg_type == type)
219 mg_copy(sv, nsv, key, klen)
227 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
228 if (isUPPER(mg->mg_type)) {
229 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
242 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
243 MGVTBL* vtbl = mg->mg_virtual;
244 moremagic = mg->mg_moremagic;
245 if (vtbl && vtbl->svt_free)
246 (*vtbl->svt_free)(sv, mg);
247 if (mg->mg_ptr && mg->mg_type != 'g')
249 Safefree(mg->mg_ptr);
250 else if (mg->mg_len == HEf_SVKEY)
251 SvREFCNT_dec((SV*)mg->mg_ptr);
252 if (mg->mg_flags & MGf_REFCOUNTED)
253 SvREFCNT_dec(mg->mg_obj);
260 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
274 switch (*mg->mg_ptr) {
275 case '1': case '2': case '3': case '4':
276 case '5': case '6': case '7': case '8': case '9': case '&':
278 paren = atoi(mg->mg_ptr);
280 if (curpm->op_pmregexp &&
281 paren <= curpm->op_pmregexp->nparens &&
282 (s = curpm->op_pmregexp->startp[paren]) &&
283 (t = curpm->op_pmregexp->endp[paren]) ) {
293 paren = curpm->op_pmregexp->lastparen;
302 if (curpm->op_pmregexp &&
303 (s = curpm->op_pmregexp->subbeg) ) {
304 i = curpm->op_pmregexp->startp[0] - s;
312 if (curpm->op_pmregexp &&
313 (s = curpm->op_pmregexp->endp[0]) ) {
314 return (STRLEN) (curpm->op_pmregexp->subend - s);
319 return (STRLEN)ofslen;
321 return (STRLEN)orslen;
324 if (!SvPOK(sv) && SvNIOK(sv))
341 switch (*mg->mg_ptr) {
342 case '\001': /* ^A */
343 sv_setsv(sv, bodytarget);
345 case '\004': /* ^D */
346 sv_setiv(sv, (IV)(debug & 32767));
348 case '\005': /* ^E */
351 # include <descrip.h>
352 # include <starlet.h>
354 $DESCRIPTOR(msgdsc,msg);
355 sv_setnv(sv,(double) vaxc$errno);
356 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
357 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
363 sv_setnv(sv, (double)Perl_rc);
364 sv_setpv(sv, os2error(Perl_rc));
366 sv_setnv(sv, (double)errno);
367 sv_setpv(sv, errno ? Strerror(errno) : "");
370 SvNOK_on(sv); /* what a wonderful hack! */
372 case '\006': /* ^F */
373 sv_setiv(sv, (IV)maxsysfd);
375 case '\010': /* ^H */
376 sv_setiv(sv, (IV)hints);
380 sv_setpv(sv, inplace);
382 sv_setsv(sv, &sv_undef);
384 case '\017': /* ^O */
385 sv_setpv(sv, osname);
387 case '\020': /* ^P */
388 sv_setiv(sv, (IV)perldb);
390 case '\024': /* ^T */
392 sv_setnv(sv, basetime);
394 sv_setiv(sv, (IV)basetime);
397 case '\027': /* ^W */
398 sv_setiv(sv, (IV)dowarn);
400 case '1': case '2': case '3': case '4':
401 case '5': case '6': case '7': case '8': case '9': case '&':
403 paren = atoi(GvENAME((GV*)mg->mg_obj));
405 if (curpm->op_pmregexp &&
406 paren <= curpm->op_pmregexp->nparens &&
407 (s = curpm->op_pmregexp->startp[paren]) &&
408 (t = curpm->op_pmregexp->endp[paren]) ) {
413 if (tainting && (tmg = mg_find(sv,'t')))
414 tmg->mg_len = 0; /* guarantee $1 untainted */
419 sv_setsv(sv,&sv_undef);
423 paren = curpm->op_pmregexp->lastparen;
427 sv_setsv(sv,&sv_undef);
431 if (curpm->op_pmregexp &&
432 (s = curpm->op_pmregexp->subbeg) ) {
433 i = curpm->op_pmregexp->startp[0] - s;
440 sv_setsv(sv,&sv_undef);
444 if (curpm->op_pmregexp &&
445 (s = curpm->op_pmregexp->endp[0]) ) {
446 sv_setpvn(sv,s, curpm->op_pmregexp->subend - s);
450 sv_setsv(sv,&sv_undef);
454 if (GvIO(last_in_gv)) {
455 sv_setiv(sv, (IV)IoLINES(GvIO(last_in_gv)));
460 sv_setiv(sv, (IV)statusvalue);
463 s = IoTOP_NAME(GvIOp(defoutgv));
467 sv_setpv(sv,GvENAME(defoutgv));
472 s = IoFMT_NAME(GvIOp(defoutgv));
474 s = GvENAME(defoutgv);
479 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(defoutgv)));
482 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(defoutgv)));
485 sv_setiv(sv, (IV)IoPAGE(GvIOp(defoutgv)));
493 sv_setiv(sv, (IV)curcop->cop_arybase);
496 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(defoutgv)) & IOf_FLUSH) != 0 );
499 sv_setpvn(sv,ofs,ofslen);
502 sv_setpvn(sv,ors,orslen);
509 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
510 sv_setpv(sv, errno ? Strerror(errno) : "");
513 int saveerrno = errno;
514 sv_setnv(sv, (double)errno);
516 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
519 sv_setpv(sv, errno ? Strerror(errno) : "");
523 SvNOK_on(sv); /* what a wonderful hack! */
526 sv_setiv(sv, (IV)uid);
529 sv_setiv(sv, (IV)euid);
532 sv_setiv(sv, (IV)gid);
534 (void)sprintf(s,"%d",(int)gid);
537 sv_setiv(sv, (IV)egid);
539 (void)sprintf(s,"%d",(int)egid);
544 Groups_t gary[NGROUPS];
546 i = getgroups(NGROUPS,gary);
548 (void)sprintf(s," %d", (int)gary[i]);
554 SvIOK_on(sv); /* what a wonderful hack! */
565 magic_getuvar(sv, mg)
569 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
571 if (uf && uf->uf_val)
572 (*uf->uf_val)(uf->uf_index, sv);
588 #ifdef DYNAMIC_ENV_FETCH
589 /* We just undefd an environment var. Is a replacement */
590 /* waiting in the wings? */
594 if (mg->mg_len == HEf_SVKEY) keysv = (SV *)mg->mg_ptr;
595 else keysv = newSVpv(mg->mg_ptr,mg->mg_len);
596 if (envhe = hv_fetch_ent(GvHVn(envgv),keysv,FALSE,0))
597 s = SvPV(HeVAL(envhe),len);
598 if (mg->mg_len != HEf_SVKEY) SvREFCNT_dec(keysv);
601 /* And you'll never guess what the dog had */
602 /* in its mouth... */
604 if (s && strEQ(ptr,"PATH")) {
605 char *strend = s + len;
608 s = cpytill(tokenbuf,s,strend,':',&i);
611 || (Stat(tokenbuf,&statbuf) && (statbuf.st_mode & 2)) )
620 magic_clearenv(sv,mg)
624 my_setenv(MgPV(mg),Nullch);
629 /* set up reliable signal() clone */
631 typedef void (*Sigfunc) _((int));
634 Sigfunc rsignal(signo,handler)
638 struct sigaction act,oact;
640 act.sa_handler = handler;
641 sigemptyset(&act.sa_mask);
644 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
646 if (sigaction(signo, &act, &oact) < 0)
649 return(oact.sa_handler);
654 /* ah well, so much for reliability */
656 #define rsignal(x,y) signal(x,y)
674 /* Are we fetching a signal entry? */
675 i = whichsig(MgPV(mg));
678 sv_setsv(sv,psig_ptr[i]);
680 void (*origsig) _((int));
681 /* get signal state without losing signals */
683 origsig = rsignal(i,sig_trap);
687 /* cache state so we don't fetch it again */
688 if(origsig == SIG_IGN)
689 sv_setpv(sv,"IGNORE");
691 sv_setsv(sv,&sv_undef);
692 psig_ptr[i] = SvREFCNT_inc(sv);
699 magic_clearsig(sv,mg)
704 /* Are we clearing a signal entry? */
705 i = whichsig(MgPV(mg));
708 SvREFCNT_dec(psig_ptr[i]);
712 SvREFCNT_dec(psig_name[i]);
730 if (strEQ(s,"__DIE__"))
732 else if (strEQ(s,"__WARN__"))
734 else if (strEQ(s,"__PARSE__"))
737 croak("No such hook: %s", s);
745 i = whichsig(s); /* ...no, a brick */
747 if (dowarn || strEQ(s,"ALARM"))
748 warn("No such signal: SIG%s", s);
752 SvREFCNT_dec(psig_ptr[i]);
753 psig_ptr[i] = SvREFCNT_inc(sv);
755 SvREFCNT_dec(psig_name[i]);
756 psig_name[i] = newSVpv(s,strlen(s));
757 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
758 SvREADONLY_on(psig_name[i]);
760 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
762 (void)rsignal(i,sighandler);
764 *svp = SvREFCNT_inc(sv);
767 s = SvPV_force(sv,na);
768 if (strEQ(s,"IGNORE")) {
770 (void)rsignal(i,SIG_IGN);
774 else if (strEQ(s,"DEFAULT") || !*s) {
776 (void)rsignal(i,SIG_DFL);
781 if(hints & HINT_STRICT_REFS)
782 die(no_symref,s,"a subroutine");
783 if (!strchr(s,':') && !strchr(s,'\'')) {
784 sprintf(tokenbuf, "main::%s",s);
785 sv_setpv(sv,tokenbuf);
788 (void)rsignal(i,sighandler);
790 *svp = SvREFCNT_inc(sv);
807 magic_setamagic(sv,mg)
811 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
816 #endif /* OVERLOAD */
819 magic_setnkeys(sv,mg)
824 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
825 LvTARG(sv) = Nullsv; /* Don't allow a ref to reassign this. */
831 magic_methpack(sv,mg,meth)
845 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
846 else if (mg->mg_len == HEf_SVKEY)
847 PUSHs((SV*)mg->mg_ptr);
849 else if (mg->mg_type == 'p')
850 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
853 if (perl_call_method(meth, G_SCALAR))
854 sv_setsv(sv, *stack_sp--);
866 magic_methpack(sv,mg,"FETCH");
868 mg->mg_flags |= MGf_GSKIP;
884 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
885 else if (mg->mg_len == HEf_SVKEY)
886 PUSHs((SV*)mg->mg_ptr);
888 else if (mg->mg_type == 'p')
889 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
893 perl_call_method("STORE", G_SCALAR|G_DISCARD);
899 magic_clearpack(sv,mg)
903 return magic_methpack(sv,mg,"DELETE");
906 int magic_wipepack(sv,mg)
916 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
922 magic_nextpack(sv,mg,key)
928 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
939 if (perl_call_method(meth, G_SCALAR))
940 sv_setsv(key, *stack_sp--);
948 magic_existspack(sv,mg)
952 return magic_methpack(sv,mg,"EXISTS");
956 magic_setdbline(sv,mg)
967 svp = av_fetch(GvAV(gv),
968 atoi(MgPV(mg)), FALSE);
969 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
972 warn("Can't break at that line\n");
977 magic_getarylen(sv,mg)
981 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + curcop->cop_arybase);
986 magic_setarylen(sv,mg)
990 av_fill((AV*)mg->mg_obj, SvIV(sv) - curcop->cop_arybase);
999 SV* lsv = LvTARG(sv);
1001 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1002 mg = mg_find(lsv, 'g');
1003 if (mg && mg->mg_len >= 0) {
1004 sv_setiv(sv, mg->mg_len + curcop->cop_arybase);
1017 SV* lsv = LvTARG(sv);
1023 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1024 mg = mg_find(lsv, 'g');
1028 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1029 mg = mg_find(lsv, 'g');
1031 else if (!SvOK(sv)) {
1035 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1037 pos = SvIV(sv) - curcop->cop_arybase;
1051 magic_getglob(sv,mg)
1055 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1057 gv_efullname3(sv,((GV*)sv), "*");
1061 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1066 magic_setglob(sv,mg)
1076 if (*s == '*' && s[1])
1078 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1083 GvGP(sv) = gp_ref(GvGP(gv));
1089 GvIOp(gv) = newIO();
1094 magic_setsubstr(sv,mg)
1099 char *tmps = SvPV(sv,len);
1100 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1105 magic_gettaint(sv,mg)
1111 else if (mg->mg_len & 2 && mg->mg_obj == sv) /* kludge */
1117 magic_settaint(sv,mg)
1122 if (localizing == 1)
1139 do_vecset(sv); /* XXX slurp this routine */
1144 magic_setmglob(sv,mg)
1158 sv_unmagic(sv, 'B');
1164 magic_setuvar(sv,mg)
1168 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1170 if (uf && uf->uf_set)
1171 (*uf->uf_set)(uf->uf_index, sv);
1183 switch (*mg->mg_ptr) {
1184 case '\001': /* ^A */
1185 sv_setsv(bodytarget, sv);
1187 case '\004': /* ^D */
1188 debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1189 DEBUG_x(dump_all());
1191 case '\005': /* ^E */
1193 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1195 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv),4); /* will anyone ever use this? */
1198 case '\006': /* ^F */
1199 maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1201 case '\010': /* ^H */
1202 hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1208 inplace = savepv(SvPV(sv,na));
1212 case '\017': /* ^O */
1216 osname = savepv(SvPV(sv,na));
1220 case '\020': /* ^P */
1221 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1230 case '\024': /* ^T */
1232 basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1234 basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1237 case '\027': /* ^W */
1238 dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1242 if (localizing == 1)
1243 save_sptr((SV**)&last_in_gv);
1245 else if (SvOK(sv) && GvIO(last_in_gv))
1246 IoLINES(GvIOp(last_in_gv)) = (long)SvIV(sv);
1249 Safefree(IoTOP_NAME(GvIOp(defoutgv)));
1250 IoTOP_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1251 IoTOP_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1254 Safefree(IoFMT_NAME(GvIOp(defoutgv)));
1255 IoFMT_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1256 IoFMT_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1259 IoPAGE_LEN(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1262 IoLINES_LEFT(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1263 if (IoLINES_LEFT(GvIOp(defoutgv)) < 0L)
1264 IoLINES_LEFT(GvIOp(defoutgv)) = 0L;
1267 IoPAGE(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1270 IoFLAGS(GvIOp(defoutgv)) &= ~IOf_FLUSH;
1271 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) != 0) {
1272 IoFLAGS(GvIOp(defoutgv)) |= IOf_FLUSH;
1276 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1277 multiline = (i != 0);
1283 rs = SvREFCNT_inc(nrs);
1288 ors = savepv(SvPV(sv,orslen));
1293 ofs = savepv(SvPV(sv, ofslen));
1298 ofmt = savepv(SvPV(sv,na));
1301 compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1304 statusvalue = FIXSTATUS(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1307 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv),SvIV(sv) == EVMSERR ? 4 : vaxc$errno); /* will anyone ever use this? */
1310 uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1312 delaymagic |= DM_RUID;
1313 break; /* don't do magic till later */
1316 (void)setruid((Uid_t)uid);
1319 (void)setreuid((Uid_t)uid, (Uid_t)-1);
1321 #ifdef HAS_SETRESUID
1322 (void)setresuid((Uid_t)uid, (Uid_t)-1, (Uid_t)-1);
1324 if (uid == euid) /* special case $< = $> */
1327 uid = (I32)getuid();
1328 croak("setruid() not implemented");
1333 uid = (I32)getuid();
1334 tainting |= (uid && (euid != uid || egid != gid));
1337 euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1339 delaymagic |= DM_EUID;
1340 break; /* don't do magic till later */
1343 (void)seteuid((Uid_t)euid);
1346 (void)setreuid((Uid_t)-1, (Uid_t)euid);
1348 #ifdef HAS_SETRESUID
1349 (void)setresuid((Uid_t)-1, (Uid_t)euid, (Uid_t)-1);
1351 if (euid == uid) /* special case $> = $< */
1354 euid = (I32)geteuid();
1355 croak("seteuid() not implemented");
1360 euid = (I32)geteuid();
1361 tainting |= (uid && (euid != uid || egid != gid));
1364 gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1366 delaymagic |= DM_RGID;
1367 break; /* don't do magic till later */
1370 (void)setrgid((Gid_t)gid);
1373 (void)setregid((Gid_t)gid, (Gid_t)-1);
1375 #ifdef HAS_SETRESGID
1376 (void)setresgid((Gid_t)gid, (Gid_t)-1, (Gid_t) 1);
1378 if (gid == egid) /* special case $( = $) */
1381 gid = (I32)getgid();
1382 croak("setrgid() not implemented");
1387 gid = (I32)getgid();
1388 tainting |= (uid && (euid != uid || egid != gid));
1391 egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1393 delaymagic |= DM_EGID;
1394 break; /* don't do magic till later */
1397 (void)setegid((Gid_t)egid);
1400 (void)setregid((Gid_t)-1, (Gid_t)egid);
1402 #ifdef HAS_SETRESGID
1403 (void)setresgid((Gid_t)-1, (Gid_t)egid, (Gid_t)-1);
1405 if (egid == gid) /* special case $) = $( */
1408 egid = (I32)getegid();
1409 croak("setegid() not implemented");
1414 egid = (I32)getegid();
1415 tainting |= (uid && (euid != uid || egid != gid));
1418 chopset = SvPV_force(sv,na);
1424 /* See if all the arguments are contiguous in memory */
1425 for (i = 1; i < origargc; i++) {
1426 if (origargv[i] == s + 1)
1427 s += strlen(++s); /* this one is ok too */
1429 if (origenviron[0] == s + 1) { /* can grab env area too? */
1430 my_setenv("NoNeSuCh", Nullch);
1431 /* force copy of environment */
1432 for (i = 0; origenviron[i]; i++)
1433 if (origenviron[i] == s + 1)
1436 origalen = s - origargv[0];
1438 s = SvPV_force(sv,len);
1440 if (i >= origalen) {
1444 Copy(s, origargv[0], i, char);
1447 Copy(s, origargv[0], i, char);
1450 while (++i < origalen)
1453 for (i = 1; i < origargc; i++)
1454 origargv[i] = Nullch;
1465 register char **sigv;
1467 for (sigv = sig_name+1; *sigv; sigv++)
1468 if (strEQ(sig,*sigv))
1469 return sig_num[sigv - sig_name];
1471 if (strEQ(sig,"CHLD"))
1475 if (strEQ(sig,"CLD"))
1493 die("Signal SIG%s received, but no signal handler set.\n",
1496 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1497 if (!cv || !CvROOT(cv)) {
1499 warn("SIG%s handler \"%s\" not defined.\n",
1500 sig_name[sig], GvENAME(gv) );
1504 oldstack = curstack;
1505 if (curstack != signalstack)
1506 AvFILL(signalstack) = 0;
1507 SWITCHSTACK(curstack, signalstack);
1510 sv = SvREFCNT_inc(psig_name[sig]);
1512 sv = sv_newmortal();
1513 sv_setpv(sv,sig_name[sig]);
1519 perl_call_sv((SV*)cv, G_DISCARD);
1521 SWITCHSTACK(signalstack, oldstack);