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.
34 static void UnwindHandler(void *pPerl, void *ptr)
36 ((CPerlObj*)pPerl)->unwind_handler_stack(ptr);
39 static void RestoreMagic(void *pPerl, void *ptr)
41 ((CPerlObj*)pPerl)->restore_magic(ptr);
43 #define UNWINDHANDLER UnwindHandler
44 #define RESTOREMAGIC RestoreMagic
45 #define VTBL this->*vtbl
52 typedef struct magic_state MGS;
54 static void restore_magic _((void *p));
55 #define UNWINDHANDLER unwind_handler_stack
56 #define RESTOREMAGIC restore_magic
62 save_magic(MGS *mgs, SV *sv)
64 assert(SvMAGICAL(sv));
67 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
68 SAVEDESTRUCTOR(RESTOREMAGIC, mgs);
72 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
76 restore_magic(void *p)
81 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
84 SvFLAGS(sv) |= mgs->mgs_flags;
88 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
96 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
97 MGVTBL* vtbl = mg->mg_virtual;
99 if ((vtbl->svt_get != NULL) && !(mg->mg_flags & MGf_GSKIP))
103 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || (vtbl->svt_clear != NULL))
118 save_magic(&mgs, sv);
121 while ((mg = *mgp) != 0) {
122 MGVTBL* vtbl = mg->mg_virtual;
123 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && (vtbl->svt_get != NULL)) {
124 (VTBL->svt_get)(sv, mg);
125 /* Ignore this magic if it's been deleted */
126 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
127 (mg->mg_flags & MGf_GSKIP))
130 /* Advance to next magic (complicated by possible deletion) */
131 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
132 mgp = &mg->mg_moremagic;
136 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
151 save_magic(&mgs, sv);
153 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
154 MGVTBL* vtbl = mg->mg_virtual;
155 nextmg = mg->mg_moremagic; /* it may delete itself */
156 if (mg->mg_flags & MGf_GSKIP) {
157 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
160 if (vtbl && (vtbl->svt_set != NULL))
161 (VTBL->svt_set)(sv, mg);
175 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
176 MGVTBL* vtbl = mg->mg_virtual;
177 if (vtbl && (vtbl->svt_len != NULL)) {
181 save_magic(&mgs, sv);
182 /* omit MGf_GSKIP -- not changed here */
183 len = (VTBL->svt_len)(sv, mg);
189 junk = SvPV(sv, len);
199 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
200 MGVTBL* vtbl = mg->mg_virtual;
201 if (vtbl && vtbl->svt_len) {
204 /* omit MGf_GSKIP -- not changed here */
205 len = (*vtbl->svt_len)(sv, mg);
213 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
218 croak("Size magic not implemented");
231 save_magic(&mgs, sv);
233 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
234 MGVTBL* vtbl = mg->mg_virtual;
235 /* omit GSKIP -- never set here */
237 if (vtbl && (vtbl->svt_clear != NULL))
238 (VTBL->svt_clear)(sv, mg);
246 mg_find(SV *sv, int type)
249 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
250 if (mg->mg_type == type)
257 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
261 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
262 if (isUPPER(mg->mg_type)) {
263 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
275 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
276 MGVTBL* vtbl = mg->mg_virtual;
277 moremagic = mg->mg_moremagic;
278 if (vtbl && (vtbl->svt_free != NULL))
279 (VTBL->svt_free)(sv, mg);
280 if (mg->mg_ptr && mg->mg_type != 'g')
281 if (mg->mg_length >= 0)
282 Safefree(mg->mg_ptr);
283 else if (mg->mg_length == HEf_SVKEY)
284 SvREFCNT_dec((SV*)mg->mg_ptr);
285 if (mg->mg_flags & MGf_REFCOUNTED)
286 SvREFCNT_dec(mg->mg_obj);
293 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
298 magic_len(SV *sv, MAGIC *mg)
307 switch (*mg->mg_ptr) {
308 case '1': case '2': case '3': case '4':
309 case '5': case '6': case '7': case '8': case '9': case '&':
310 if (curpm && (rx = curpm->op_pmregexp)) {
311 paren = atoi(mg->mg_ptr);
313 if (paren <= rx->nparens &&
314 (s = rx->startp[paren]) &&
315 (t = rx->endp[paren]))
324 if (curpm && (rx = curpm->op_pmregexp)) {
325 paren = rx->lastparen;
331 if (curpm && (rx = curpm->op_pmregexp)) {
332 if ((s = rx->subbeg) && rx->startp[0]) {
333 i = rx->startp[0] - s;
340 if (curpm && (rx = curpm->op_pmregexp)) {
341 if (rx->subend && (s = rx->endp[0])) {
349 return (STRLEN)ofslen;
351 return (STRLEN)orslen;
354 if (!SvPOK(sv) && SvNIOK(sv))
362 magic_get(SV *sv, MAGIC *mg)
371 switch (*mg->mg_ptr) {
372 case '\001': /* ^A */
373 sv_setsv(sv, bodytarget);
375 case '\004': /* ^D */
376 sv_setiv(sv, (IV)(debug & 32767));
378 case '\005': /* ^E */
381 # include <descrip.h>
382 # include <starlet.h>
384 $DESCRIPTOR(msgdsc,msg);
385 sv_setnv(sv,(double) vaxc$errno);
386 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
387 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
393 if (!(_emx_env & 0x200)) { /* Under DOS */
394 sv_setnv(sv, (double)errno);
395 sv_setpv(sv, errno ? Strerror(errno) : "");
397 if (errno != errno_isOS2)
398 Perl_rc = _syserrno();
399 sv_setnv(sv, (double)Perl_rc);
400 sv_setpv(sv, os2error(Perl_rc));
405 DWORD dwErr = GetLastError();
406 sv_setnv(sv, (double)dwErr);
412 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
413 sv_setpvn(sv, sMsg, dwLen);
414 PerlProc_FreeBuf(sMsg);
416 win32_str_os_error(sv, dwErr);
424 sv_setnv(sv, (double)errno);
425 sv_setpv(sv, errno ? Strerror(errno) : "");
429 SvNOK_on(sv); /* what a wonderful hack! */
431 case '\006': /* ^F */
432 sv_setiv(sv, (IV)maxsysfd);
434 case '\010': /* ^H */
435 sv_setiv(sv, (IV)hints);
439 sv_setpv(sv, inplace);
441 sv_setsv(sv, &sv_undef);
443 case '\017': /* ^O */
444 sv_setpv(sv, osname);
446 case '\020': /* ^P */
447 sv_setiv(sv, (IV)perldb);
449 case '\023': /* ^S */
452 if (lex_state != LEX_NOTPARSING)
460 case '\024': /* ^T */
462 sv_setnv(sv, basetime);
464 sv_setiv(sv, (IV)basetime);
467 case '\027': /* ^W */
468 sv_setiv(sv, (IV)dowarn);
470 case '1': case '2': case '3': case '4':
471 case '5': case '6': case '7': case '8': case '9': case '&':
472 if (curpm && (rx = curpm->op_pmregexp)) {
474 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
475 * XXX Does the new way break anything?
477 paren = atoi(mg->mg_ptr);
479 if (paren <= rx->nparens &&
480 (s = rx->startp[paren]) &&
481 (t = rx->endp[paren]))
488 was_tainted = tainted;
493 tainted = was_tainted || RX_MATCH_TAINTED(rx);
498 sv_setsv(sv,&sv_undef);
501 if (curpm && (rx = curpm->op_pmregexp)) {
502 paren = rx->lastparen;
506 sv_setsv(sv,&sv_undef);
509 if (curpm && (rx = curpm->op_pmregexp)) {
510 if ((s = rx->subbeg) && rx->startp[0]) {
511 i = rx->startp[0] - s;
515 sv_setsv(sv,&sv_undef);
518 if (curpm && (rx = curpm->op_pmregexp)) {
519 if (rx->subend && (s = rx->endp[0])) {
524 sv_setsv(sv,&sv_undef);
528 if (GvIO(last_in_gv)) {
529 sv_setiv(sv, (IV)IoLINES(GvIO(last_in_gv)));
536 sv_setiv(sv, (IV)STATUS_CURRENT);
537 #ifdef COMPLEX_STATUS
538 LvTARGOFF(sv) = statusvalue;
539 LvTARGLEN(sv) = statusvalue_vms;
544 s = IoTOP_NAME(GvIOp(defoutgv));
548 sv_setpv(sv,GvENAME(defoutgv));
553 s = IoFMT_NAME(GvIOp(defoutgv));
555 s = GvENAME(defoutgv);
560 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(defoutgv)));
563 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(defoutgv)));
566 sv_setiv(sv, (IV)IoPAGE(GvIOp(defoutgv)));
574 WITH_THR(sv_setiv(sv, (IV)curcop->cop_arybase));
577 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(defoutgv)) & IOf_FLUSH) != 0 );
580 sv_setpvn(sv,ofs,ofslen);
583 sv_setpvn(sv,ors,orslen);
590 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
591 sv_setpv(sv, errno ? Strerror(errno) : "");
594 int saveerrno = errno;
595 sv_setnv(sv, (double)errno);
597 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
600 sv_setpv(sv, errno ? Strerror(errno) : "");
604 SvNOK_on(sv); /* what a wonderful hack! */
607 sv_setiv(sv, (IV)uid);
610 sv_setiv(sv, (IV)euid);
613 sv_setiv(sv, (IV)gid);
614 sv_setpvf(sv, "%Vd", (IV)gid);
617 sv_setiv(sv, (IV)egid);
618 sv_setpvf(sv, "%Vd", (IV)egid);
622 Groups_t gary[NGROUPS];
623 i = getgroups(NGROUPS,gary);
625 sv_catpvf(sv, " %Vd", (IV)gary[i]);
628 SvIOK_on(sv); /* what a wonderful hack! */
636 sv_setsv(sv, thr->errsv);
638 #endif /* USE_THREADS */
644 magic_getuvar(SV *sv, MAGIC *mg)
646 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
648 if (uf && uf->uf_val)
649 (*uf->uf_val)(uf->uf_index, sv);
654 magic_setenv(SV *sv, MAGIC *mg)
665 #ifdef DYNAMIC_ENV_FETCH
666 /* We just undefd an environment var. Is a replacement */
667 /* waiting in the wings? */
670 if ((valp = hv_fetch(GvHVn(envgv), ptr, klen, FALSE)))
671 s = SvPV(*valp, len);
675 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
676 /* And you'll never guess what the dog had */
677 /* in its mouth... */
679 MgTAINTEDDIR_off(mg);
681 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
682 char pathbuf[256], eltbuf[256], *cp, *elt = s;
686 do { /* DCL$PATH may be a search list */
687 while (1) { /* as may dev portion of any element */
688 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
689 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
690 cando_by_name(S_IWUSR,0,elt) ) {
695 if ((cp = strchr(elt, ':')) != Nullch)
697 if (my_trnlnm(elt, eltbuf, j++))
703 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
706 if (s && klen == 4 && strEQ(ptr,"PATH")) {
707 char *strend = s + len;
712 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
715 if (i >= sizeof tmpbuf /* too long -- assume the worst */
717 || (Stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
724 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
730 magic_clearenv(SV *sv, MAGIC *mg)
732 my_setenv(MgPV(mg,na),Nullch);
737 magic_set_all_env(SV *sv, MAGIC *mg)
740 die("Can't make list assignment to %%ENV on this system");
745 magic_clear_all_env(sv,mg);
746 hv_iterinit((HV*)sv);
747 while (entry = hv_iternext((HV*)sv)) {
749 my_setenv(hv_iterkey(entry, &keylen),
750 SvPV(hv_iterval((HV*)sv, entry), na));
758 magic_clear_all_env(SV *sv, MAGIC *mg)
761 die("Can't make list assignment to %%ENV on this system");
764 char *envv = GetEnvironmentStrings();
768 char *end = strchr(cur,'=');
769 if (end && end != cur) {
771 my_setenv(cur,Nullch);
773 cur += strlen(end+1)+1;
775 else if ((len = strlen(cur)))
778 FreeEnvironmentStrings(envv);
782 if (environ == origenviron)
783 New(901, environ, 1, char*);
785 for (i = 0; environ[i]; i++)
786 Safefree(environ[i]);
795 magic_getsig(SV *sv, MAGIC *mg)
798 /* Are we fetching a signal entry? */
799 i = whichsig(MgPV(mg,na));
802 sv_setsv(sv,psig_ptr[i]);
804 Sighandler_t sigstate = rsignal_state(i);
806 /* cache state so we don't fetch it again */
807 if(sigstate == SIG_IGN)
808 sv_setpv(sv,"IGNORE");
810 sv_setsv(sv,&sv_undef);
811 psig_ptr[i] = SvREFCNT_inc(sv);
818 magic_clearsig(SV *sv, MAGIC *mg)
821 /* Are we clearing a signal entry? */
822 i = whichsig(MgPV(mg,na));
825 SvREFCNT_dec(psig_ptr[i]);
829 SvREFCNT_dec(psig_name[i]);
837 magic_setsig(SV *sv, MAGIC *mg)
846 if (strEQ(s,"__DIE__"))
848 else if (strEQ(s,"__WARN__"))
850 else if (strEQ(s,"__PARSE__"))
853 croak("No such hook: %s", s);
861 i = whichsig(s); /* ...no, a brick */
863 if (dowarn || strEQ(s,"ALARM"))
864 warn("No such signal: SIG%s", s);
867 SvREFCNT_dec(psig_name[i]);
868 SvREFCNT_dec(psig_ptr[i]);
869 psig_ptr[i] = SvREFCNT_inc(sv);
870 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
871 psig_name[i] = newSVpv(s, strlen(s));
872 SvREADONLY_on(psig_name[i]);
874 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
876 (void)rsignal(i, sighandlerp);
878 *svp = SvREFCNT_inc(sv);
881 s = SvPV_force(sv,na);
882 if (strEQ(s,"IGNORE")) {
884 (void)rsignal(i, SIG_IGN);
888 else if (strEQ(s,"DEFAULT") || !*s) {
890 (void)rsignal(i, SIG_DFL);
896 * We should warn if HINT_STRICT_REFS, but without
897 * access to a known hint bit in a known OP, we can't
898 * tell whether HINT_STRICT_REFS is in force or not.
900 if (!strchr(s,':') && !strchr(s,'\''))
901 sv_setpv(sv, form("main::%s", s));
903 (void)rsignal(i, sighandlerp);
905 *svp = SvREFCNT_inc(sv);
911 magic_setisa(SV *sv, MAGIC *mg)
916 HV *basefields = Nullhv;
920 static char *FIELDS = "FIELDS";
924 if (mg->mg_type == 'i')
925 return 0; /* Ignore lower-case version of the magic */
927 stash = GvSTASH(mg->mg_obj);
928 svp = AvARRAY((AV*)sv);
930 /* NOTE: No support for tied ISA */
931 for (fill = AvFILLp((AV*)sv); fill >= 0; fill--, svp++) {
932 HV *basestash = gv_stashsv(*svp, FALSE);
936 warn("No such package \"%_\" in @ISA assignment", *svp);
939 gvp = (GV**)hv_fetch(basestash, FIELDS, 6, FALSE);
940 if (gvp && *gvp && GvHV(*gvp)) {
942 croak("Can't multiply inherit %%FIELDS");
943 basefields = GvHV(*gvp);
950 gv = (GV*)*hv_fetch(stash, FIELDS, 6, TRUE);
952 gv_init(gv, stash, FIELDS, 6, TRUE);
955 if (HvKEYS(GvHV(gv)))
956 croak("Inherited %%FIELDS can't override existing %%FIELDS");
958 hv_iterinit(GvHV(gv));
959 while ((he = hv_iternext(basefields)))
960 hv_store(GvHV(gv), HeKEY(he), HeKLEN(he), HeVAL(he), HeHASH(he));
968 magic_setamagic(SV *sv, MAGIC *mg)
970 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
975 #endif /* OVERLOAD */
978 magic_setnkeys(SV *sv, MAGIC *mg)
981 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
982 LvTARG(sv) = Nullsv; /* Don't allow a ref to reassign this. */
988 magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
997 if (mg->mg_length >= 0)
998 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_length)));
999 else if (mg->mg_length == HEf_SVKEY)
1000 PUSHs((SV*)mg->mg_ptr);
1002 else if (mg->mg_type == 'p') {
1003 PUSHs(sv_2mortal(newSViv(mg->mg_length)));
1011 return perl_call_method(meth, flags);
1015 magic_methpack(SV *sv, MAGIC *mg, char *meth)
1022 if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
1023 sv_setsv(sv, *stack_sp--);
1032 magic_getpack(SV *sv, MAGIC *mg)
1034 magic_methpack(sv,mg,"FETCH");
1036 mg->mg_flags |= MGf_GSKIP;
1041 magic_setpack(SV *sv, MAGIC *mg)
1044 magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1050 magic_clearpack(SV *sv, MAGIC *mg)
1052 return magic_methpack(sv,mg,"DELETE");
1057 magic_sizepack(SV *sv, MAGIC *mg)
1064 if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1066 retval = (U32) SvIV(sv)-1;
1073 int magic_wipepack(SV *sv, MAGIC *mg)
1081 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1087 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1090 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1101 if (perl_call_method(meth, G_SCALAR))
1102 sv_setsv(key, *stack_sp--);
1110 magic_existspack(SV *sv, MAGIC *mg)
1112 return magic_methpack(sv,mg,"EXISTS");
1116 magic_setdbline(SV *sv, MAGIC *mg)
1126 svp = av_fetch(GvAV(gv),
1127 atoi(MgPV(mg,na)), FALSE);
1128 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1131 warn("Can't break at that line\n");
1136 magic_getarylen(SV *sv, MAGIC *mg)
1139 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + curcop->cop_arybase);
1144 magic_setarylen(SV *sv, MAGIC *mg)
1147 av_fill((AV*)mg->mg_obj, SvIV(sv) - curcop->cop_arybase);
1152 magic_getpos(SV *sv, MAGIC *mg)
1154 SV* lsv = LvTARG(sv);
1156 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1157 mg = mg_find(lsv, 'g');
1158 if (mg && mg->mg_length >= 0) {
1160 sv_setiv(sv, mg->mg_length + curcop->cop_arybase);
1169 magic_setpos(SV *sv, MAGIC *mg)
1171 SV* lsv = LvTARG(sv);
1177 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1178 mg = mg_find(lsv, 'g');
1182 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1183 mg = mg_find(lsv, 'g');
1185 else if (!SvOK(sv)) {
1189 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1191 WITH_THR(pos = SvIV(sv) - curcop->cop_arybase);
1199 mg->mg_length = pos;
1200 mg->mg_flags &= ~MGf_MINMATCH;
1206 magic_getglob(SV *sv, MAGIC *mg)
1208 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1210 gv_efullname3(sv,((GV*)sv), "*");
1214 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1219 magic_setglob(SV *sv, MAGIC *mg)
1227 if (*s == '*' && s[1])
1229 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1234 GvGP(sv) = gp_ref(GvGP(gv));
1239 magic_setsubstr(SV *sv, MAGIC *mg)
1242 char *tmps = SvPV(sv,len);
1243 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1248 magic_gettaint(SV *sv, MAGIC *mg)
1251 TAINT_IF((mg->mg_length & 1) ||
1252 (mg->mg_length & 2) && mg->mg_obj == sv); /* kludge */
1257 magic_settaint(SV *sv, MAGIC *mg)
1261 if (localizing == 1)
1262 mg->mg_length <<= 1;
1264 mg->mg_length >>= 1;
1269 mg->mg_length &= ~1;
1274 magic_setvec(SV *sv, MAGIC *mg)
1276 do_vecset(sv); /* XXX slurp this routine */
1281 magic_getdefelem(SV *sv, MAGIC *mg)
1284 if (LvTARGLEN(sv)) {
1286 HV* hv = (HV*)LvTARG(sv);
1287 HE* he = hv_fetch_ent(hv, mg->mg_obj, FALSE, 0);
1292 AV* av = (AV*)LvTARG(sv);
1293 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1294 targ = AvARRAY(av)[LvTARGOFF(sv)];
1296 if (targ && targ != &sv_undef) {
1297 dTHR; /* just for SvREFCNT_dec */
1298 /* somebody else defined it for us */
1299 SvREFCNT_dec(LvTARG(sv));
1300 LvTARG(sv) = SvREFCNT_inc(targ);
1302 SvREFCNT_dec(mg->mg_obj);
1303 mg->mg_obj = Nullsv;
1304 mg->mg_flags &= ~MGf_REFCOUNTED;
1309 sv_setsv(sv, targ ? targ : &sv_undef);
1314 magic_setdefelem(SV *sv, MAGIC *mg)
1319 sv_setsv(LvTARG(sv), sv);
1320 SvSETMAGIC(LvTARG(sv));
1326 magic_freedefelem(SV *sv, MAGIC *mg)
1328 SvREFCNT_dec(LvTARG(sv));
1333 vivify_defelem(SV *sv)
1335 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1339 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1342 HV* hv = (HV*)LvTARG(sv);
1343 HE* he = hv_fetch_ent(hv, mg->mg_obj, TRUE, 0);
1344 if (!he || (value = HeVAL(he)) == &sv_undef)
1345 croak(no_helem, SvPV(mg->mg_obj, na));
1348 AV* av = (AV*)LvTARG(sv);
1349 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1350 LvTARG(sv) = Nullsv; /* array can't be extended */
1352 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1353 if (!svp || (value = *svp) == &sv_undef)
1354 croak(no_aelem, (I32)LvTARGOFF(sv));
1357 (void)SvREFCNT_inc(value);
1358 SvREFCNT_dec(LvTARG(sv));
1361 SvREFCNT_dec(mg->mg_obj);
1362 mg->mg_obj = Nullsv;
1363 mg->mg_flags &= ~MGf_REFCOUNTED;
1367 magic_setmglob(SV *sv, MAGIC *mg)
1375 magic_setbm(SV *sv, MAGIC *mg)
1377 sv_unmagic(sv, 'B');
1383 magic_setfm(SV *sv, MAGIC *mg)
1385 sv_unmagic(sv, 'f');
1391 magic_setuvar(SV *sv, MAGIC *mg)
1393 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1395 if (uf && uf->uf_set)
1396 (*uf->uf_set)(uf->uf_index, sv);
1401 magic_freeregexp(SV *sv, MAGIC *mg)
1403 regexp *re = (regexp *)mg->mg_obj;
1408 #ifdef USE_LOCALE_COLLATE
1410 magic_setcollxfrm(SV *sv, MAGIC *mg)
1413 * René Descartes said "I think not."
1414 * and vanished with a faint plop.
1417 Safefree(mg->mg_ptr);
1423 #endif /* USE_LOCALE_COLLATE */
1426 magic_set(SV *sv, MAGIC *mg)
1432 switch (*mg->mg_ptr) {
1433 case '\001': /* ^A */
1434 sv_setsv(bodytarget, sv);
1436 case '\004': /* ^D */
1437 debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1438 DEBUG_x(dump_all());
1440 case '\005': /* ^E */
1442 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1445 SetLastError( SvIV(sv) );
1447 /* will anyone ever use this? */
1448 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1452 case '\006': /* ^F */
1453 maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1455 case '\010': /* ^H */
1456 hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1462 inplace = savepv(SvPV(sv,na));
1466 case '\017': /* ^O */
1470 osname = savepv(SvPV(sv,na));
1474 case '\020': /* ^P */
1475 perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1477 case '\024': /* ^T */
1479 basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1481 basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1484 case '\027': /* ^W */
1485 dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1489 if (localizing == 1)
1490 save_sptr((SV**)&last_in_gv);
1492 else if (SvOK(sv) && GvIO(last_in_gv))
1493 IoLINES(GvIOp(last_in_gv)) = (long)SvIV(sv);
1496 Safefree(IoTOP_NAME(GvIOp(defoutgv)));
1497 IoTOP_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1498 IoTOP_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1501 Safefree(IoFMT_NAME(GvIOp(defoutgv)));
1502 IoFMT_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
1503 IoFMT_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1506 IoPAGE_LEN(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1509 IoLINES_LEFT(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1510 if (IoLINES_LEFT(GvIOp(defoutgv)) < 0L)
1511 IoLINES_LEFT(GvIOp(defoutgv)) = 0L;
1514 IoPAGE(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1518 IO *io = GvIOp(defoutgv);
1519 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1520 IoFLAGS(io) &= ~IOf_FLUSH;
1522 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1523 PerlIO *ofp = IoOFP(io);
1525 (void)PerlIO_flush(ofp);
1526 IoFLAGS(io) |= IOf_FLUSH;
1532 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1533 multiline = (i != 0);
1539 rs = SvREFCNT_inc(nrs);
1544 if (SvOK(sv) || SvGMAGICAL(sv))
1545 ors = savepv(SvPV(sv,orslen));
1554 ofs = savepv(SvPV(sv, ofslen));
1559 ofmt = savepv(SvPV(sv,na));
1562 compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1565 #ifdef COMPLEX_STATUS
1566 if (localizing == 2) {
1567 statusvalue = LvTARGOFF(sv);
1568 statusvalue_vms = LvTARGLEN(sv);
1572 #ifdef VMSISH_STATUS
1574 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1577 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1580 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv),
1581 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1584 uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1586 delaymagic |= DM_RUID;
1587 break; /* don't do magic till later */
1590 (void)setruid((Uid_t)uid);
1593 (void)setreuid((Uid_t)uid, (Uid_t)-1);
1595 #ifdef HAS_SETRESUID
1596 (void)setresuid((Uid_t)uid, (Uid_t)-1, (Uid_t)-1);
1598 if (uid == euid) /* special case $< = $> */
1599 (void)PerlProc_setuid(uid);
1601 uid = (I32)PerlProc_getuid();
1602 croak("setruid() not implemented");
1607 uid = (I32)PerlProc_getuid();
1608 tainting |= (uid && (euid != uid || egid != gid));
1611 euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1613 delaymagic |= DM_EUID;
1614 break; /* don't do magic till later */
1617 (void)seteuid((Uid_t)euid);
1620 (void)setreuid((Uid_t)-1, (Uid_t)euid);
1622 #ifdef HAS_SETRESUID
1623 (void)setresuid((Uid_t)-1, (Uid_t)euid, (Uid_t)-1);
1625 if (euid == uid) /* special case $> = $< */
1626 PerlProc_setuid(euid);
1628 euid = (I32)PerlProc_geteuid();
1629 croak("seteuid() not implemented");
1634 euid = (I32)PerlProc_geteuid();
1635 tainting |= (uid && (euid != uid || egid != gid));
1638 gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1640 delaymagic |= DM_RGID;
1641 break; /* don't do magic till later */
1644 (void)setrgid((Gid_t)gid);
1647 (void)setregid((Gid_t)gid, (Gid_t)-1);
1649 #ifdef HAS_SETRESGID
1650 (void)setresgid((Gid_t)gid, (Gid_t)-1, (Gid_t) 1);
1652 if (gid == egid) /* special case $( = $) */
1653 (void)PerlProc_setgid(gid);
1655 gid = (I32)PerlProc_getgid();
1656 croak("setrgid() not implemented");
1661 gid = (I32)PerlProc_getgid();
1662 tainting |= (uid && (euid != uid || egid != gid));
1665 #ifdef HAS_SETGROUPS
1667 char *p = SvPV(sv, na);
1668 Groups_t gary[NGROUPS];
1670 SET_NUMERIC_STANDARD();
1673 egid = I_V(atof(p));
1674 for (i = 0; i < NGROUPS; ++i) {
1675 while (*p && !isSPACE(*p))
1681 gary[i] = I_V(atof(p));
1684 (void)setgroups(i, gary);
1686 #else /* HAS_SETGROUPS */
1687 egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1688 #endif /* HAS_SETGROUPS */
1690 delaymagic |= DM_EGID;
1691 break; /* don't do magic till later */
1694 (void)setegid((Gid_t)egid);
1697 (void)setregid((Gid_t)-1, (Gid_t)egid);
1699 #ifdef HAS_SETRESGID
1700 (void)setresgid((Gid_t)-1, (Gid_t)egid, (Gid_t)-1);
1702 if (egid == gid) /* special case $) = $( */
1703 (void)PerlProc_setgid(egid);
1705 egid = (I32)PerlProc_getegid();
1706 croak("setegid() not implemented");
1711 egid = (I32)PerlProc_getegid();
1712 tainting |= (uid && (euid != uid || egid != gid));
1715 chopset = SvPV_force(sv,na);
1721 /* See if all the arguments are contiguous in memory */
1722 for (i = 1; i < origargc; i++) {
1723 if (origargv[i] == s + 1
1725 || origargv[i] == s + 2
1728 s += strlen(++s); /* this one is ok too */
1732 /* can grab env area too? */
1733 if (origenviron && (origenviron[0] == s + 1
1735 || (origenviron[0] == s + 9 && (s += 8))
1738 my_setenv("NoNe SuCh", Nullch);
1739 /* force copy of environment */
1740 for (i = 0; origenviron[i]; i++)
1741 if (origenviron[i] == s + 1)
1746 origalen = s - origargv[0];
1748 s = SvPV_force(sv,len);
1750 if (i >= origalen) {
1752 /* don't allow system to limit $0 seen by script */
1753 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1754 Copy(s, origargv[0], i, char);
1759 Copy(s, origargv[0], i, char);
1762 while (++i < origalen)
1765 for (i = 1; i < origargc; i++)
1766 origargv[i] = Nullch;
1771 sv_setsv(thr->errsv, sv);
1773 #endif /* USE_THREADS */
1780 magic_mutexfree(SV *sv, MAGIC *mg)
1783 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1784 (unsigned long)thr, (unsigned long)sv);)
1786 croak("panic: magic_mutexfree");
1787 MUTEX_DESTROY(MgMUTEXP(mg));
1788 COND_DESTROY(MgCONDP(mg));
1792 #endif /* USE_THREADS */
1797 register char **sigv;
1799 for (sigv = sig_name+1; *sigv; sigv++)
1800 if (strEQ(sig,*sigv))
1801 return sig_num[sigv - sig_name];
1803 if (strEQ(sig,"CHLD"))
1807 if (strEQ(sig,"CLD"))
1816 unwind_handler_stack(void *p)
1819 U32 flags = *(U32*)p;
1822 savestack_ix -= 5; /* Unprotect save in progress. */
1823 /* cxstack_ix-- Not needed, die already unwound it. */
1825 SvREFCNT_dec(sig_sv);
1839 I32 o_save_i = savestack_ix, type;
1843 if (savestack_ix + 15 <= savestack_max)
1845 if (cxstack_ix < cxstack_max - 2)
1847 if (markstack_ptr < markstack_max - 2)
1849 if (retstack_ix < retstack_max - 2)
1851 if (scopestack_ix < scopestack_max - 3)
1854 if (flags & 2) { /* POPBLOCK may decrease cxstack too early. */
1855 cxstack_ix++; /* Protect from overwrite. */
1856 cx = &cxstack[cxstack_ix];
1857 type = cx->cx_type; /* Can be during partial write. */
1858 cx->cx_type = CXt_NULL; /* Make it safe for unwind. */
1861 die("Signal SIG%s received, but no signal handler set.\n",
1864 /* Max number of items pushed there is 3*n or 4. We cannot fix
1865 infinity, so we fix 4 (in fact 5): */
1867 savestack_ix += 5; /* Protect save in progress. */
1868 o_save_i = savestack_ix;
1869 SAVEDESTRUCTOR(UNWINDHANDLER, (void*)&flags);
1872 markstack_ptr++; /* Protect mark. */
1875 retstack[retstack_ix] = NULL;
1879 /* sv_2cv is too complicated, try a simpler variant first: */
1880 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
1881 || SvTYPE(cv) != SVt_PVCV)
1882 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1884 if (!cv || !CvROOT(cv)) {
1886 warn("SIG%s handler \"%s\" not defined.\n",
1887 sig_name[sig], (gv ? GvENAME(gv)
1894 oldstack = curstack;
1895 if (curstack != signalstack)
1896 AvFILLp(signalstack) = 0;
1897 SWITCHSTACK(curstack, signalstack);
1899 if(psig_name[sig]) {
1900 sv = SvREFCNT_inc(psig_name[sig]);
1904 sv = sv_newmortal();
1905 sv_setpv(sv,sig_name[sig]);
1911 perl_call_sv((SV*)cv, G_DISCARD);
1913 SWITCHSTACK(signalstack, oldstack);
1916 savestack_ix -= 8; /* Unprotect save in progress. */
1918 cxstack[cxstack_ix].cx_type = type;
1929 op = myop; /* Apparently not needed... */
1931 Sv = tSv; /* Restore global temporaries. */