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);
179 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
180 MGVTBL* vtbl = mg->mg_virtual;
181 if (vtbl && vtbl->svt_len) {
184 /* omit MGf_GSKIP -- not changed here */
185 len = (*vtbl->svt_len)(sv, mg);
193 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
198 croak("Size magic not implemented");
211 save_magic(&mgs, sv);
213 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
214 MGVTBL* vtbl = mg->mg_virtual;
215 /* omit GSKIP -- never set here */
217 if (vtbl && vtbl->svt_clear)
218 (*vtbl->svt_clear)(sv, mg);
226 mg_find(SV *sv, int type)
229 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
230 if (mg->mg_type == type)
237 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
241 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
242 if (isUPPER(mg->mg_type)) {
243 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
255 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
256 MGVTBL* vtbl = mg->mg_virtual;
257 moremagic = mg->mg_moremagic;
258 if (vtbl && vtbl->svt_free)
259 (*vtbl->svt_free)(sv, mg);
260 if (mg->mg_ptr && mg->mg_type != 'g')
262 Safefree(mg->mg_ptr);
263 else if (mg->mg_len == HEf_SVKEY)
264 SvREFCNT_dec((SV*)mg->mg_ptr);
265 if (mg->mg_flags & MGf_REFCOUNTED)
266 SvREFCNT_dec(mg->mg_obj);
273 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
278 magic_len(SV *sv, MAGIC *mg)
287 switch (*mg->mg_ptr) {
288 case '1': case '2': case '3': case '4':
289 case '5': case '6': case '7': case '8': case '9': case '&':
290 if (curpm && (rx = curpm->op_pmregexp)) {
291 paren = atoi(mg->mg_ptr);
293 if (paren <= rx->nparens &&
294 (s = rx->startp[paren]) &&
295 (t = rx->endp[paren]))
304 if (curpm && (rx = curpm->op_pmregexp)) {
305 paren = rx->lastparen;
311 if (curpm && (rx = curpm->op_pmregexp)) {
312 if ((s = rx->subbeg) && rx->startp[0]) {
313 i = rx->startp[0] - s;
320 if (curpm && (rx = curpm->op_pmregexp)) {
321 if (rx->subend && (s = rx->endp[0])) {
329 return (STRLEN)ofslen;
331 return (STRLEN)orslen;
334 if (!SvPOK(sv) && SvNIOK(sv))
342 magic_get(SV *sv, MAGIC *mg)
351 switch (*mg->mg_ptr) {
352 case '\001': /* ^A */
353 sv_setsv(sv, bodytarget);
355 case '\004': /* ^D */
356 sv_setiv(sv, (IV)(debug & 32767));
358 case '\005': /* ^E */
361 # include <descrip.h>
362 # include <starlet.h>
364 $DESCRIPTOR(msgdsc,msg);
365 sv_setnv(sv,(double) vaxc$errno);
366 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
367 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
373 if (!(_emx_env & 0x200)) { /* Under DOS */
374 sv_setnv(sv, (double)errno);
375 sv_setpv(sv, errno ? Strerror(errno) : "");
377 if (errno != errno_isOS2)
378 Perl_rc = _syserrno();
379 sv_setnv(sv, (double)Perl_rc);
380 sv_setpv(sv, os2error(Perl_rc));
385 DWORD dwErr = GetLastError();
386 sv_setnv(sv, (double)dwErr);
388 win32_str_os_error(sv, dwErr);
394 sv_setnv(sv, (double)errno);
395 sv_setpv(sv, errno ? Strerror(errno) : "");
399 SvNOK_on(sv); /* what a wonderful hack! */
401 case '\006': /* ^F */
402 sv_setiv(sv, (IV)maxsysfd);
404 case '\010': /* ^H */
405 sv_setiv(sv, (IV)hints);
409 sv_setpv(sv, inplace);
411 sv_setsv(sv, &sv_undef);
413 case '\017': /* ^O */
414 sv_setpv(sv, osname);
416 case '\020': /* ^P */
417 sv_setiv(sv, (IV)perldb);
419 case '\023': /* ^S */
422 if (lex_state != LEX_NOTPARSING)
430 case '\024': /* ^T */
432 sv_setnv(sv, basetime);
434 sv_setiv(sv, (IV)basetime);
437 case '\027': /* ^W */
438 sv_setiv(sv, (IV)dowarn);
440 case '1': case '2': case '3': case '4':
441 case '5': case '6': case '7': case '8': case '9': case '&':
442 if (curpm && (rx = curpm->op_pmregexp)) {
444 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
445 * XXX Does the new way break anything?
447 paren = atoi(mg->mg_ptr);
449 if (paren <= rx->nparens &&
450 (s = rx->startp[paren]) &&
451 (t = rx->endp[paren]))
458 was_tainted = tainted;
463 tainted = (was_tainted || RX_MATCH_TAINTED(rx) ||
464 (curpm->op_pmflags & PMf_TAINTMEM));
469 sv_setsv(sv,&sv_undef);
472 if (curpm && (rx = curpm->op_pmregexp)) {
473 paren = rx->lastparen;
477 sv_setsv(sv,&sv_undef);
480 if (curpm && (rx = curpm->op_pmregexp)) {
481 if ((s = rx->subbeg) && rx->startp[0]) {
482 i = rx->startp[0] - s;
486 sv_setsv(sv,&sv_undef);
489 if (curpm && (rx = curpm->op_pmregexp)) {
490 if (rx->subend && (s = rx->endp[0])) {
495 sv_setsv(sv,&sv_undef);
499 if (GvIO(last_in_gv)) {
500 sv_setiv(sv, (IV)IoLINES(GvIO(last_in_gv)));
507 sv_setiv(sv, (IV)STATUS_CURRENT);
508 #ifdef COMPLEX_STATUS
509 LvTARGOFF(sv) = statusvalue;
510 LvTARGLEN(sv) = statusvalue_vms;
515 s = IoTOP_NAME(GvIOp(defoutgv));
519 sv_setpv(sv,GvENAME(defoutgv));
524 s = IoFMT_NAME(GvIOp(defoutgv));
526 s = GvENAME(defoutgv);
531 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(defoutgv)));
534 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(defoutgv)));
537 sv_setiv(sv, (IV)IoPAGE(GvIOp(defoutgv)));
545 WITH_THR(sv_setiv(sv, (IV)curcop->cop_arybase));
548 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(defoutgv)) & IOf_FLUSH) != 0 );
551 sv_setpvn(sv,ofs,ofslen);
554 sv_setpvn(sv,ors,orslen);
561 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
562 sv_setpv(sv, errno ? Strerror(errno) : "");
565 int saveerrno = errno;
566 sv_setnv(sv, (double)errno);
568 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
571 sv_setpv(sv, errno ? Strerror(errno) : "");
575 SvNOK_on(sv); /* what a wonderful hack! */
578 sv_setiv(sv, (IV)uid);
581 sv_setiv(sv, (IV)euid);
584 sv_setiv(sv, (IV)gid);
585 sv_setpvf(sv, "%Vd", (IV)gid);
588 sv_setiv(sv, (IV)egid);
589 sv_setpvf(sv, "%Vd", (IV)egid);
593 Groups_t gary[NGROUPS];
594 i = getgroups(NGROUPS,gary);
596 sv_catpvf(sv, " %Vd", (IV)gary[i]);
599 SvIOK_on(sv); /* what a wonderful hack! */
607 sv_setsv(sv, thr->errsv);
609 #endif /* USE_THREADS */
615 magic_getuvar(SV *sv, MAGIC *mg)
617 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
619 if (uf && uf->uf_val)
620 (*uf->uf_val)(uf->uf_index, sv);
625 magic_setenv(SV *sv, MAGIC *mg)
636 #ifdef DYNAMIC_ENV_FETCH
637 /* We just undefd an environment var. Is a replacement */
638 /* waiting in the wings? */
641 if ((valp = hv_fetch(GvHVn(envgv), ptr, klen, FALSE)))
642 s = SvPV(*valp, len);
646 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
647 /* And you'll never guess what the dog had */
648 /* in its mouth... */
650 MgTAINTEDDIR_off(mg);
652 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
653 char pathbuf[256], eltbuf[256], *cp, *elt = s;
657 do { /* DCL$PATH may be a search list */
658 while (1) { /* as may dev portion of any element */
659 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
660 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
661 cando_by_name(S_IWUSR,0,elt) ) {
666 if ((cp = strchr(elt, ':')) != Nullch)
668 if (my_trnlnm(elt, eltbuf, j++))
674 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
677 if (s && klen == 4 && strEQ(ptr,"PATH")) {
678 char *strend = s + len;
683 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
686 if (i >= sizeof tmpbuf /* too long -- assume the worst */
688 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
695 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
701 magic_clearenv(SV *sv, MAGIC *mg)
703 my_setenv(MgPV(mg,na),Nullch);
708 magic_set_all_env(SV *sv, MAGIC *mg)
711 die("Can't make list assignment to %%ENV on this system");
716 magic_clear_all_env(sv,mg);
717 hv_iterinit((HV*)sv);
718 while (entry = hv_iternext((HV*)sv)) {
720 my_setenv(hv_iterkey(entry, &keylen),
721 SvPV(hv_iterval((HV*)sv, entry), na));
729 magic_clear_all_env(SV *sv, MAGIC *mg)
732 die("Can't make list assignment to %%ENV on this system");
735 char *envv = GetEnvironmentStrings();
739 char *end = strchr(cur,'=');
740 if (end && end != cur) {
742 my_setenv(cur,Nullch);
744 cur += strlen(end+1)+1;
746 else if ((len = strlen(cur)))
749 FreeEnvironmentStrings(envv);
753 if (environ == origenviron)
754 New(901, environ, 1, char*);
756 for (i = 0; environ[i]; i++)
757 Safefree(environ[i]);
766 magic_getsig(SV *sv, MAGIC *mg)
769 /* Are we fetching a signal entry? */
770 i = whichsig(MgPV(mg,na));
773 sv_setsv(sv,psig_ptr[i]);
775 Sighandler_t sigstate = rsignal_state(i);
777 /* cache state so we don't fetch it again */
778 if(sigstate == SIG_IGN)
779 sv_setpv(sv,"IGNORE");
781 sv_setsv(sv,&sv_undef);
782 psig_ptr[i] = SvREFCNT_inc(sv);
789 magic_clearsig(SV *sv, MAGIC *mg)
792 /* Are we clearing a signal entry? */
793 i = whichsig(MgPV(mg,na));
796 SvREFCNT_dec(psig_ptr[i]);
800 SvREFCNT_dec(psig_name[i]);
808 magic_setsig(SV *sv, MAGIC *mg)
817 if (strEQ(s,"__DIE__"))
819 else if (strEQ(s,"__WARN__"))
821 else if (strEQ(s,"__PARSE__"))
824 croak("No such hook: %s", s);
832 i = whichsig(s); /* ...no, a brick */
834 if (dowarn || strEQ(s,"ALARM"))
835 warn("No such signal: SIG%s", s);
838 SvREFCNT_dec(psig_name[i]);
839 SvREFCNT_dec(psig_ptr[i]);
840 psig_ptr[i] = SvREFCNT_inc(sv);
841 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
842 psig_name[i] = newSVpv(s, strlen(s));
843 SvREADONLY_on(psig_name[i]);
845 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
847 (void)rsignal(i, sighandlerp);
849 *svp = SvREFCNT_inc(sv);
852 s = SvPV_force(sv,na);
853 if (strEQ(s,"IGNORE")) {
855 (void)rsignal(i, SIG_IGN);
859 else if (strEQ(s,"DEFAULT") || !*s) {
861 (void)rsignal(i, SIG_DFL);
867 * We should warn if HINT_STRICT_REFS, but without
868 * access to a known hint bit in a known OP, we can't
869 * tell whether HINT_STRICT_REFS is in force or not.
871 if (!strchr(s,':') && !strchr(s,'\''))
872 sv_setpv(sv, form("main::%s", s));
874 (void)rsignal(i, sighandlerp);
876 *svp = SvREFCNT_inc(sv);
882 magic_setisa(SV *sv, MAGIC *mg)
887 HV *basefields = Nullhv;
891 static char *FIELDS = "FIELDS";
895 if (mg->mg_type == 'i')
896 return 0; /* Ignore lower-case version of the magic */
898 stash = GvSTASH(mg->mg_obj);
899 svp = AvARRAY((AV*)sv);
901 /* NOTE: No support for tied ISA */
902 for (fill = AvFILLp((AV*)sv); fill >= 0; fill--, svp++) {
903 HV *basestash = gv_stashsv(*svp, FALSE);
907 warn("No such package \"%_\" in @ISA assignment", *svp);
910 gvp = (GV**)hv_fetch(basestash, FIELDS, 6, FALSE);
911 if (gvp && *gvp && GvHV(*gvp)) {
913 croak("Can't multiply inherit %%FIELDS");
914 basefields = GvHV(*gvp);
921 gv = (GV*)*hv_fetch(stash, FIELDS, 6, TRUE);
923 gv_init(gv, stash, FIELDS, 6, TRUE);
926 if (HvKEYS(GvHV(gv)))
927 croak("Inherited %%FIELDS can't override existing %%FIELDS");
929 hv_iterinit(GvHV(gv));
930 while ((he = hv_iternext(basefields)))
931 hv_store(GvHV(gv), HeKEY(he), HeKLEN(he), HeVAL(he), HeHASH(he));
939 magic_setamagic(SV *sv, MAGIC *mg)
941 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
946 #endif /* OVERLOAD */
949 magic_setnkeys(SV *sv, MAGIC *mg)
952 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
953 LvTARG(sv) = Nullsv; /* Don't allow a ref to reassign this. */
958 /* caller is responsible for stack switching/cleanup */
960 magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
970 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
971 else if (mg->mg_len == HEf_SVKEY)
972 PUSHs((SV*)mg->mg_ptr);
974 else if (mg->mg_type == 'p') {
975 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
983 return perl_call_method(meth, flags);
987 magic_methpack(SV *sv, MAGIC *mg, char *meth)
995 if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
996 sv_setsv(sv, *stack_sp--);
1006 magic_getpack(SV *sv, MAGIC *mg)
1008 magic_methpack(sv,mg,"FETCH");
1010 mg->mg_flags |= MGf_GSKIP;
1015 magic_setpack(SV *sv, MAGIC *mg)
1019 PUSHSTACK(SI_MAGIC);
1020 magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1027 magic_clearpack(SV *sv, MAGIC *mg)
1029 return magic_methpack(sv,mg,"DELETE");
1034 magic_sizepack(SV *sv, MAGIC *mg)
1041 PUSHSTACK(SI_MAGIC);
1042 if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1044 retval = (U32) SvIV(sv)-1;
1052 int magic_wipepack(SV *sv, MAGIC *mg)
1057 PUSHSTACK(SI_MAGIC);
1061 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1068 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1071 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1075 PUSHSTACK(SI_MAGIC);
1083 if (perl_call_method(meth, G_SCALAR))
1084 sv_setsv(key, *stack_sp--);
1093 magic_existspack(SV *sv, MAGIC *mg)
1095 return magic_methpack(sv,mg,"EXISTS");
1099 magic_setdbline(SV *sv, MAGIC *mg)
1109 svp = av_fetch(GvAV(gv),
1110 atoi(MgPV(mg,na)), FALSE);
1111 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1114 warn("Can't break at that line\n");
1119 magic_getarylen(SV *sv, MAGIC *mg)
1122 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + curcop->cop_arybase);
1127 magic_setarylen(SV *sv, MAGIC *mg)
1130 av_fill((AV*)mg->mg_obj, SvIV(sv) - curcop->cop_arybase);
1135 magic_getpos(SV *sv, MAGIC *mg)
1137 SV* lsv = LvTARG(sv);
1139 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1140 mg = mg_find(lsv, 'g');
1141 if (mg && mg->mg_len >= 0) {
1143 sv_setiv(sv, mg->mg_len + curcop->cop_arybase);
1152 magic_setpos(SV *sv, MAGIC *mg)
1154 SV* lsv = LvTARG(sv);
1160 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1161 mg = mg_find(lsv, 'g');
1165 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1166 mg = mg_find(lsv, 'g');
1168 else if (!SvOK(sv)) {
1172 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1174 WITH_THR(pos = SvIV(sv) - curcop->cop_arybase);
1183 mg->mg_flags &= ~MGf_MINMATCH;
1189 magic_getglob(SV *sv, MAGIC *mg)
1191 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1193 gv_efullname3(sv,((GV*)sv), "*");
1197 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1202 magic_setglob(SV *sv, MAGIC *mg)
1210 if (*s == '*' && s[1])
1212 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1217 GvGP(sv) = gp_ref(GvGP(gv));
1222 magic_setsubstr(SV *sv, MAGIC *mg)
1225 char *tmps = SvPV(sv,len);
1226 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1231 magic_gettaint(SV *sv, MAGIC *mg)
1234 TAINT_IF((mg->mg_len & 1) ||
1235 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1240 magic_settaint(SV *sv, MAGIC *mg)
1244 if (localizing == 1)
1257 magic_setvec(SV *sv, MAGIC *mg)
1259 do_vecset(sv); /* XXX slurp this routine */
1264 magic_getdefelem(SV *sv, MAGIC *mg)
1267 if (LvTARGLEN(sv)) {
1269 HV* hv = (HV*)LvTARG(sv);
1270 HE* he = hv_fetch_ent(hv, mg->mg_obj, FALSE, 0);
1275 AV* av = (AV*)LvTARG(sv);
1276 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1277 targ = AvARRAY(av)[LvTARGOFF(sv)];
1279 if (targ && targ != &sv_undef) {
1280 dTHR; /* just for SvREFCNT_dec */
1281 /* somebody else defined it for us */
1282 SvREFCNT_dec(LvTARG(sv));
1283 LvTARG(sv) = SvREFCNT_inc(targ);
1285 SvREFCNT_dec(mg->mg_obj);
1286 mg->mg_obj = Nullsv;
1287 mg->mg_flags &= ~MGf_REFCOUNTED;
1292 sv_setsv(sv, targ ? targ : &sv_undef);
1297 magic_setdefelem(SV *sv, MAGIC *mg)
1302 sv_setsv(LvTARG(sv), sv);
1303 SvSETMAGIC(LvTARG(sv));
1309 magic_freedefelem(SV *sv, MAGIC *mg)
1311 SvREFCNT_dec(LvTARG(sv));
1316 vivify_defelem(SV *sv)
1318 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1322 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1325 HV* hv = (HV*)LvTARG(sv);
1326 HE* he = hv_fetch_ent(hv, mg->mg_obj, TRUE, 0);
1327 if (!he || (value = HeVAL(he)) == &sv_undef)
1328 croak(no_helem, SvPV(mg->mg_obj, na));
1331 AV* av = (AV*)LvTARG(sv);
1332 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1333 LvTARG(sv) = Nullsv; /* array can't be extended */
1335 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1336 if (!svp || (value = *svp) == &sv_undef)
1337 croak(no_aelem, (I32)LvTARGOFF(sv));
1340 (void)SvREFCNT_inc(value);
1341 SvREFCNT_dec(LvTARG(sv));
1344 SvREFCNT_dec(mg->mg_obj);
1345 mg->mg_obj = Nullsv;
1346 mg->mg_flags &= ~MGf_REFCOUNTED;
1350 magic_setmglob(SV *sv, MAGIC *mg)
1358 magic_setbm(SV *sv, MAGIC *mg)
1360 sv_unmagic(sv, 'B');
1366 magic_setfm(SV *sv, MAGIC *mg)
1368 sv_unmagic(sv, 'f');
1374 magic_setuvar(SV *sv, MAGIC *mg)
1376 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1378 if (uf && uf->uf_set)
1379 (*uf->uf_set)(uf->uf_index, sv);
1384 magic_freeregexp(SV *sv, MAGIC *mg)
1386 regexp *re = (regexp *)mg->mg_obj;
1391 #ifdef USE_LOCALE_COLLATE
1393 magic_setcollxfrm(SV *sv, MAGIC *mg)
1396 * René Descartes said "I think not."
1397 * and vanished with a faint plop.
1400 Safefree(mg->mg_ptr);
1406 #endif /* USE_LOCALE_COLLATE */
1409 magic_set(SV *sv, MAGIC *mg)
1415 switch (*mg->mg_ptr) {
1416 case '\001': /* ^A */
1417 sv_setsv(bodytarget, sv);
1419 case '\004': /* ^D */
1420 debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1421 DEBUG_x(dump_all());
1423 case '\005': /* ^E */
1425 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1428 SetLastError( SvIV(sv) );
1430 /* will anyone ever use this? */
1431 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1435 case '\006': /* ^F */
1436 maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1438 case '\010': /* ^H */
1439 hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1445 inplace = savepv(SvPV(sv,na));
1449 case '\017': /* ^O */
1453 osname = savepv(SvPV(sv,na));
1457 case '\020': /* ^P */
1458 perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1460 case '\024': /* ^T */
1462 basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1464 basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1467 case '\027': /* ^W */
1468 dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1472 if (localizing == 1)
1473 save_sptr((SV**)&last_in_gv);
1475 else if (SvOK(sv) && GvIO(last_in_gv))
1476 IoLINES(GvIOp(last_in_gv)) = (long)SvIV(sv);
1479 Safefree(IoTOP_NAME(GvIOp(defoutgv)));
1480 IoTOP_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1481 IoTOP_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1484 Safefree(IoFMT_NAME(GvIOp(defoutgv)));
1485 IoFMT_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1486 IoFMT_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1489 IoPAGE_LEN(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1492 IoLINES_LEFT(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1493 if (IoLINES_LEFT(GvIOp(defoutgv)) < 0L)
1494 IoLINES_LEFT(GvIOp(defoutgv)) = 0L;
1497 IoPAGE(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1501 IO *io = GvIOp(defoutgv);
1502 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1503 IoFLAGS(io) &= ~IOf_FLUSH;
1505 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1506 PerlIO *ofp = IoOFP(io);
1508 (void)PerlIO_flush(ofp);
1509 IoFLAGS(io) |= IOf_FLUSH;
1515 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1516 multiline = (i != 0);
1522 rs = SvREFCNT_inc(nrs);
1527 if (SvOK(sv) || SvGMAGICAL(sv))
1528 ors = savepv(SvPV(sv,orslen));
1537 ofs = savepv(SvPV(sv, ofslen));
1542 ofmt = savepv(SvPV(sv,na));
1545 compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1548 #ifdef COMPLEX_STATUS
1549 if (localizing == 2) {
1550 statusvalue = LvTARGOFF(sv);
1551 statusvalue_vms = LvTARGLEN(sv);
1555 #ifdef VMSISH_STATUS
1557 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1560 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1563 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1564 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1567 uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1569 delaymagic |= DM_RUID;
1570 break; /* don't do magic till later */
1573 (void)setruid((Uid_t)uid);
1576 (void)setreuid((Uid_t)uid, (Uid_t)-1);
1578 #ifdef HAS_SETRESUID
1579 (void)setresuid((Uid_t)uid, (Uid_t)-1, (Uid_t)-1);
1581 if (uid == euid) /* special case $< = $> */
1584 uid = (I32)getuid();
1585 croak("setruid() not implemented");
1590 uid = (I32)getuid();
1591 tainting |= (uid && (euid != uid || egid != gid));
1594 euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1596 delaymagic |= DM_EUID;
1597 break; /* don't do magic till later */
1600 (void)seteuid((Uid_t)euid);
1603 (void)setreuid((Uid_t)-1, (Uid_t)euid);
1605 #ifdef HAS_SETRESUID
1606 (void)setresuid((Uid_t)-1, (Uid_t)euid, (Uid_t)-1);
1608 if (euid == uid) /* special case $> = $< */
1611 euid = (I32)geteuid();
1612 croak("seteuid() not implemented");
1617 euid = (I32)geteuid();
1618 tainting |= (uid && (euid != uid || egid != gid));
1621 gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1623 delaymagic |= DM_RGID;
1624 break; /* don't do magic till later */
1627 (void)setrgid((Gid_t)gid);
1630 (void)setregid((Gid_t)gid, (Gid_t)-1);
1632 #ifdef HAS_SETRESGID
1633 (void)setresgid((Gid_t)gid, (Gid_t)-1, (Gid_t) 1);
1635 if (gid == egid) /* special case $( = $) */
1638 gid = (I32)getgid();
1639 croak("setrgid() not implemented");
1644 gid = (I32)getgid();
1645 tainting |= (uid && (euid != uid || egid != gid));
1648 #ifdef HAS_SETGROUPS
1650 char *p = SvPV(sv, na);
1651 Groups_t gary[NGROUPS];
1653 SET_NUMERIC_STANDARD();
1656 egid = I_V(atof(p));
1657 for (i = 0; i < NGROUPS; ++i) {
1658 while (*p && !isSPACE(*p))
1664 gary[i] = I_V(atof(p));
1667 (void)setgroups(i, gary);
1669 #else /* HAS_SETGROUPS */
1670 egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1671 #endif /* HAS_SETGROUPS */
1673 delaymagic |= DM_EGID;
1674 break; /* don't do magic till later */
1677 (void)setegid((Gid_t)egid);
1680 (void)setregid((Gid_t)-1, (Gid_t)egid);
1682 #ifdef HAS_SETRESGID
1683 (void)setresgid((Gid_t)-1, (Gid_t)egid, (Gid_t)-1);
1685 if (egid == gid) /* special case $) = $( */
1688 egid = (I32)getegid();
1689 croak("setegid() not implemented");
1694 egid = (I32)getegid();
1695 tainting |= (uid && (euid != uid || egid != gid));
1698 chopset = SvPV_force(sv,na);
1704 /* See if all the arguments are contiguous in memory */
1705 for (i = 1; i < origargc; i++) {
1706 if (origargv[i] == s + 1
1708 || origargv[i] == s + 2
1711 s += strlen(++s); /* this one is ok too */
1715 /* can grab env area too? */
1716 if (origenviron && (origenviron[0] == s + 1
1718 || (origenviron[0] == s + 9 && (s += 8))
1721 my_setenv("NoNe SuCh", Nullch);
1722 /* force copy of environment */
1723 for (i = 0; origenviron[i]; i++)
1724 if (origenviron[i] == s + 1)
1729 origalen = s - origargv[0];
1731 s = SvPV_force(sv,len);
1733 if (i >= origalen) {
1735 /* don't allow system to limit $0 seen by script */
1736 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1737 Copy(s, origargv[0], i, char);
1742 Copy(s, origargv[0], i, char);
1745 while (++i < origalen)
1748 for (i = 1; i < origargc; i++)
1749 origargv[i] = Nullch;
1754 sv_setsv(thr->errsv, sv);
1756 #endif /* USE_THREADS */
1763 magic_mutexfree(SV *sv, MAGIC *mg)
1766 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1767 (unsigned long)thr, (unsigned long)sv);)
1769 croak("panic: magic_mutexfree");
1770 MUTEX_DESTROY(MgMUTEXP(mg));
1771 COND_DESTROY(MgCONDP(mg));
1775 #endif /* USE_THREADS */
1780 register char **sigv;
1782 for (sigv = sig_name+1; *sigv; sigv++)
1783 if (strEQ(sig,*sigv))
1784 return sig_num[sigv - sig_name];
1786 if (strEQ(sig,"CHLD"))
1790 if (strEQ(sig,"CLD"))
1799 unwind_handler_stack(void *p)
1802 U32 flags = *(U32*)p;
1805 savestack_ix -= 5; /* Unprotect save in progress. */
1806 /* cxstack_ix-- Not needed, die already unwound it. */
1808 SvREFCNT_dec(sig_sv);
1821 I32 o_save_i = savestack_ix, type;
1824 if (savestack_ix + 15 <= savestack_max)
1826 if (markstack_ptr < markstack_max - 2)
1828 if (retstack_ix < retstack_max - 2)
1830 if (scopestack_ix < scopestack_max - 3)
1834 die("Signal SIG%s received, but no signal handler set.\n",
1837 /* Max number of items pushed there is 3*n or 4. We cannot fix
1838 infinity, so we fix 4 (in fact 5): */
1840 savestack_ix += 5; /* Protect save in progress. */
1841 o_save_i = savestack_ix;
1842 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
1845 markstack_ptr++; /* Protect mark. */
1848 retstack[retstack_ix] = NULL;
1852 /* sv_2cv is too complicated, try a simpler variant first: */
1853 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
1854 || SvTYPE(cv) != SVt_PVCV)
1855 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1857 if (!cv || !CvROOT(cv)) {
1859 warn("SIG%s handler \"%s\" not defined.\n",
1860 sig_name[sig], (gv ? GvENAME(gv)
1867 if(psig_name[sig]) {
1868 sv = SvREFCNT_inc(psig_name[sig]);
1872 sv = sv_newmortal();
1873 sv_setpv(sv,sig_name[sig]);
1876 PUSHSTACK(SI_SIGNAL);
1881 perl_call_sv((SV*)cv, G_DISCARD);
1886 savestack_ix -= 8; /* Unprotect save in progress. */
1895 op = myop; /* Apparently not needed... */
1897 Sv = tSv; /* Restore global temporaries. */