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.
35 #define VTBL this->*vtbl
42 typedef struct magic_state MGS;
44 static void restore_magic _((void *p));
50 save_magic(MGS *mgs, SV *sv)
52 assert(SvMAGICAL(sv));
55 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
56 SAVEDESTRUCTOR(restore_magic, mgs);
60 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
64 restore_magic(void *p)
69 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
72 SvFLAGS(sv) |= mgs->mgs_flags;
76 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
84 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
85 MGVTBL* vtbl = mg->mg_virtual;
87 if ((vtbl->svt_get != NULL) && !(mg->mg_flags & MGf_GSKIP))
91 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || (vtbl->svt_clear != NULL))
106 save_magic(&mgs, sv);
109 while ((mg = *mgp) != 0) {
110 MGVTBL* vtbl = mg->mg_virtual;
111 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && (vtbl->svt_get != NULL)) {
112 (VTBL->svt_get)(sv, mg);
113 /* Ignore this magic if it's been deleted */
114 if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
115 (mg->mg_flags & MGf_GSKIP))
118 /* Advance to next magic (complicated by possible deletion) */
119 if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
120 mgp = &mg->mg_moremagic;
124 mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
139 save_magic(&mgs, sv);
141 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
142 MGVTBL* vtbl = mg->mg_virtual;
143 nextmg = mg->mg_moremagic; /* it may delete itself */
144 if (mg->mg_flags & MGf_GSKIP) {
145 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
148 if (vtbl && (vtbl->svt_set != NULL))
149 (VTBL->svt_set)(sv, mg);
163 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
164 MGVTBL* vtbl = mg->mg_virtual;
165 if (vtbl && (vtbl->svt_len != NULL)) {
169 save_magic(&mgs, sv);
170 /* omit MGf_GSKIP -- not changed here */
171 len = (VTBL->svt_len)(sv, mg);
177 junk = SvPV(sv, len);
187 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
188 MGVTBL* vtbl = mg->mg_virtual;
189 if (vtbl && (vtbl->svt_len != NULL)) {
192 /* omit MGf_GSKIP -- not changed here */
193 len = (VTBL->svt_len)(sv, mg);
201 len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
206 croak("Size magic not implemented");
219 save_magic(&mgs, sv);
221 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
222 MGVTBL* vtbl = mg->mg_virtual;
223 /* omit GSKIP -- never set here */
225 if (vtbl && (vtbl->svt_clear != NULL))
226 (VTBL->svt_clear)(sv, mg);
234 mg_find(SV *sv, int type)
237 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
238 if (mg->mg_type == type)
245 mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
249 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
250 if (isUPPER(mg->mg_type)) {
252 mg->mg_type == 'P' ? SvTIED_obj(sv, mg) : mg->mg_obj,
253 toLOWER(mg->mg_type), key, klen);
265 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
266 MGVTBL* vtbl = mg->mg_virtual;
267 moremagic = mg->mg_moremagic;
268 if (vtbl && (vtbl->svt_free != NULL))
269 (VTBL->svt_free)(sv, mg);
270 if (mg->mg_ptr && mg->mg_type != 'g')
272 Safefree(mg->mg_ptr);
273 else if (mg->mg_len == HEf_SVKEY)
274 SvREFCNT_dec((SV*)mg->mg_ptr);
275 if (mg->mg_flags & MGf_REFCOUNTED)
276 SvREFCNT_dec(mg->mg_obj);
283 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
288 magic_len(SV *sv, MAGIC *mg)
297 switch (*mg->mg_ptr) {
298 case '1': case '2': case '3': case '4':
299 case '5': case '6': case '7': case '8': case '9': case '&':
300 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
301 paren = atoi(mg->mg_ptr);
303 if (paren <= rx->nparens &&
304 (s = rx->startp[paren]) &&
305 (t = rx->endp[paren]))
314 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
315 paren = rx->lastparen;
321 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
322 if ((s = rx->subbeg) && rx->startp[0]) {
323 i = rx->startp[0] - s;
330 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
331 if (rx->subend && (s = rx->endp[0])) {
339 return (STRLEN)PL_ofslen;
341 return (STRLEN)PL_orslen;
344 if (!SvPOK(sv) && SvNIOK(sv)) {
354 magic_get(SV *sv, MAGIC *mg)
363 switch (*mg->mg_ptr) {
364 case '\001': /* ^A */
365 sv_setsv(sv, PL_bodytarget);
367 case '\004': /* ^D */
368 sv_setiv(sv, (IV)(PL_debug & 32767));
370 case '\005': /* ^E */
373 # include <descrip.h>
374 # include <starlet.h>
376 $DESCRIPTOR(msgdsc,msg);
377 sv_setnv(sv,(double) vaxc$errno);
378 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
379 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
385 if (!(_emx_env & 0x200)) { /* Under DOS */
386 sv_setnv(sv, (double)errno);
387 sv_setpv(sv, errno ? Strerror(errno) : "");
389 if (errno != errno_isOS2) {
390 int tmp = _syserrno();
391 if (tmp) /* 2nd call to _syserrno() makes it 0 */
394 sv_setnv(sv, (double)Perl_rc);
395 sv_setpv(sv, os2error(Perl_rc));
400 DWORD dwErr = GetLastError();
401 sv_setnv(sv, (double)dwErr);
407 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
408 sv_setpvn(sv, sMsg, dwLen);
409 PerlProc_FreeBuf(sMsg);
411 win32_str_os_error(sv, dwErr);
419 sv_setnv(sv, (double)errno);
420 sv_setpv(sv, errno ? Strerror(errno) : "");
424 SvNOK_on(sv); /* what a wonderful hack! */
426 case '\006': /* ^F */
427 sv_setiv(sv, (IV)PL_maxsysfd);
429 case '\010': /* ^H */
430 sv_setiv(sv, (IV)PL_hints);
432 case '\011': /* ^I */ /* NOT \t in EBCDIC */
434 sv_setpv(sv, PL_inplace);
436 sv_setsv(sv, &PL_sv_undef);
438 case '\017': /* ^O */
439 sv_setpv(sv, PL_osname);
441 case '\020': /* ^P */
442 sv_setiv(sv, (IV)PL_perldb);
444 case '\023': /* ^S */
447 if (PL_lex_state != LEX_NOTPARSING)
455 case '\024': /* ^T */
457 sv_setnv(sv, PL_basetime);
459 sv_setiv(sv, (IV)PL_basetime);
462 case '\027': /* ^W */
463 sv_setiv(sv, (IV)PL_dowarn);
465 case '1': case '2': case '3': case '4':
466 case '5': case '6': case '7': case '8': case '9': case '&':
467 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
469 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
470 * XXX Does the new way break anything?
472 paren = atoi(mg->mg_ptr);
474 if (paren <= rx->nparens &&
475 (s = rx->startp[paren]) &&
476 (t = rx->endp[paren]))
483 was_tainted = PL_tainted;
488 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
493 sv_setsv(sv,&PL_sv_undef);
496 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
497 paren = rx->lastparen;
501 sv_setsv(sv,&PL_sv_undef);
504 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
505 if ((s = rx->subbeg) && rx->startp[0]) {
506 i = rx->startp[0] - s;
510 sv_setsv(sv,&PL_sv_undef);
513 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
514 if (rx->subend && (s = rx->endp[0])) {
519 sv_setsv(sv,&PL_sv_undef);
523 if (GvIO(PL_last_in_gv)) {
524 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
530 sv_setiv(sv, (IV)STATUS_CURRENT);
531 #ifdef COMPLEX_STATUS
532 LvTARGOFF(sv) = PL_statusvalue;
533 LvTARGLEN(sv) = PL_statusvalue_vms;
538 s = IoTOP_NAME(GvIOp(PL_defoutgv));
542 sv_setpv(sv,GvENAME(PL_defoutgv));
547 s = IoFMT_NAME(GvIOp(PL_defoutgv));
549 s = GvENAME(PL_defoutgv);
554 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
557 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
560 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
568 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
571 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
574 sv_setpvn(sv,PL_ofs,PL_ofslen);
577 sv_setpvn(sv,PL_ors,PL_orslen);
580 sv_setpv(sv,PL_ofmt);
584 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
585 sv_setpv(sv, errno ? Strerror(errno) : "");
588 int saveerrno = errno;
589 sv_setnv(sv, (double)errno);
591 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
594 sv_setpv(sv, errno ? Strerror(errno) : "");
598 SvNOK_on(sv); /* what a wonderful hack! */
601 sv_setiv(sv, (IV)PL_uid);
604 sv_setiv(sv, (IV)PL_euid);
607 sv_setiv(sv, (IV)PL_gid);
608 sv_setpvf(sv, "%Vd", (IV)PL_gid);
611 sv_setiv(sv, (IV)PL_egid);
612 sv_setpvf(sv, "%Vd", (IV)PL_egid);
616 Groups_t gary[NGROUPS];
617 i = getgroups(NGROUPS,gary);
619 sv_catpvf(sv, " %Vd", (IV)gary[i]);
622 SvIOK_on(sv); /* what a wonderful hack! */
630 sv_setsv(sv, thr->errsv);
632 #endif /* USE_THREADS */
638 magic_getuvar(SV *sv, MAGIC *mg)
640 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
642 if (uf && uf->uf_val)
643 (*uf->uf_val)(uf->uf_index, sv);
648 magic_setenv(SV *sv, MAGIC *mg)
659 #ifdef DYNAMIC_ENV_FETCH
660 /* We just undefd an environment var. Is a replacement */
661 /* waiting in the wings? */
664 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
665 s = SvPV(*valp, len);
669 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
670 /* And you'll never guess what the dog had */
671 /* in its mouth... */
673 MgTAINTEDDIR_off(mg);
675 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
676 char pathbuf[256], eltbuf[256], *cp, *elt = s;
680 do { /* DCL$PATH may be a search list */
681 while (1) { /* as may dev portion of any element */
682 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
683 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
684 cando_by_name(S_IWUSR,0,elt) ) {
689 if ((cp = strchr(elt, ':')) != Nullch)
691 if (my_trnlnm(elt, eltbuf, j++))
697 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
700 if (s && klen == 4 && strEQ(ptr,"PATH")) {
701 char *strend = s + len;
706 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
709 if (i >= sizeof tmpbuf /* too long -- assume the worst */
711 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
718 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
724 magic_clearenv(SV *sv, MAGIC *mg)
727 my_setenv(MgPV(mg,n_a),Nullch);
732 magic_set_all_env(SV *sv, MAGIC *mg)
735 die("Can't make list assignment to %%ENV on this system");
741 magic_clear_all_env(sv,mg);
742 hv_iterinit((HV*)sv);
743 while (entry = hv_iternext((HV*)sv)) {
745 my_setenv(hv_iterkey(entry, &keylen),
746 SvPV(hv_iterval((HV*)sv, entry), n_a));
754 magic_clear_all_env(SV *sv, MAGIC *mg)
757 die("Can't make list assignment to %%ENV on this system");
760 char *envv = GetEnvironmentStrings();
764 char *end = strchr(cur,'=');
765 if (end && end != cur) {
767 my_setenv(cur,Nullch);
769 cur = end + strlen(end+1)+2;
771 else if ((len = strlen(cur)))
774 FreeEnvironmentStrings(envv);
778 if (environ == PL_origenviron)
779 New(901, environ, 1, char*);
781 for (i = 0; environ[i]; i++)
782 Safefree(environ[i]);
791 magic_getsig(SV *sv, MAGIC *mg)
795 /* Are we fetching a signal entry? */
796 i = whichsig(MgPV(mg,n_a));
799 sv_setsv(sv,psig_ptr[i]);
801 Sighandler_t sigstate = rsignal_state(i);
803 /* cache state so we don't fetch it again */
804 if(sigstate == SIG_IGN)
805 sv_setpv(sv,"IGNORE");
807 sv_setsv(sv,&PL_sv_undef);
808 psig_ptr[i] = SvREFCNT_inc(sv);
815 magic_clearsig(SV *sv, MAGIC *mg)
819 /* Are we clearing a signal entry? */
820 i = whichsig(MgPV(mg,n_a));
823 SvREFCNT_dec(psig_ptr[i]);
827 SvREFCNT_dec(psig_name[i]);
835 magic_setsig(SV *sv, MAGIC *mg)
845 if (strEQ(s,"__DIE__"))
847 else if (strEQ(s,"__WARN__"))
849 else if (strEQ(s,"__PARSE__"))
852 croak("No such hook: %s", s);
860 i = whichsig(s); /* ...no, a brick */
862 if (PL_dowarn || strEQ(s,"ALARM"))
863 warn("No such signal: SIG%s", s);
866 SvREFCNT_dec(psig_name[i]);
867 SvREFCNT_dec(psig_ptr[i]);
868 psig_ptr[i] = SvREFCNT_inc(sv);
869 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
870 psig_name[i] = newSVpv(s, strlen(s));
871 SvREADONLY_on(psig_name[i]);
873 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
875 (void)rsignal(i, PL_sighandlerp);
877 *svp = SvREFCNT_inc(sv);
880 s = SvPV_force(sv,n_a);
881 if (strEQ(s,"IGNORE")) {
883 (void)rsignal(i, SIG_IGN);
887 else if (strEQ(s,"DEFAULT") || !*s) {
889 (void)rsignal(i, SIG_DFL);
895 * We should warn if HINT_STRICT_REFS, but without
896 * access to a known hint bit in a known OP, we can't
897 * tell whether HINT_STRICT_REFS is in force or not.
899 if (!strchr(s,':') && !strchr(s,'\''))
900 sv_setpv(sv, form("main::%s", s));
902 (void)rsignal(i, PL_sighandlerp);
904 *svp = SvREFCNT_inc(sv);
910 magic_setisa(SV *sv, MAGIC *mg)
919 magic_setamagic(SV *sv, MAGIC *mg)
921 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
922 PL_amagic_generation++;
926 #endif /* OVERLOAD */
929 magic_getnkeys(SV *sv, MAGIC *mg)
931 HV *hv = (HV*)LvTARG(sv);
936 (void) hv_iterinit(hv);
937 if (! SvTIED_mg((SV*)hv, 'P'))
941 while (entry = hv_iternext(hv)) {
952 magic_setnkeys(SV *sv, MAGIC *mg)
955 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
960 /* caller is responsible for stack switching/cleanup */
962 magic_methcall(SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
968 PUSHs(SvTIED_obj(sv, mg));
972 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
973 else if (mg->mg_len == HEf_SVKEY)
974 PUSHs((SV*)mg->mg_ptr);
976 else if (mg->mg_type == 'p') {
977 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
985 return perl_call_method(meth, flags);
989 magic_methpack(SV *sv, MAGIC *mg, char *meth)
995 PUSHSTACKi(PERLSI_MAGIC);
997 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
998 sv_setsv(sv, *PL_stack_sp--);
1008 magic_getpack(SV *sv, MAGIC *mg)
1010 magic_methpack(sv,mg,"FETCH");
1012 mg->mg_flags |= MGf_GSKIP;
1017 magic_setpack(SV *sv, MAGIC *mg)
1021 PUSHSTACKi(PERLSI_MAGIC);
1022 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1029 magic_clearpack(SV *sv, MAGIC *mg)
1031 return magic_methpack(sv,mg,"DELETE");
1036 magic_sizepack(SV *sv, MAGIC *mg)
1043 PUSHSTACKi(PERLSI_MAGIC);
1044 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1045 sv = *PL_stack_sp--;
1046 retval = (U32) SvIV(sv)-1;
1054 int magic_wipepack(SV *sv, MAGIC *mg)
1059 PUSHSTACKi(PERLSI_MAGIC);
1061 XPUSHs(SvTIED_obj(sv, mg));
1063 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1070 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1073 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1077 PUSHSTACKi(PERLSI_MAGIC);
1080 PUSHs(SvTIED_obj(sv, mg));
1085 if (perl_call_method(meth, G_SCALAR))
1086 sv_setsv(key, *PL_stack_sp--);
1095 magic_existspack(SV *sv, MAGIC *mg)
1097 return magic_methpack(sv,mg,"EXISTS");
1101 magic_setdbline(SV *sv, MAGIC *mg)
1112 svp = av_fetch(GvAV(gv),
1113 atoi(MgPV(mg,n_a)), FALSE);
1114 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1117 warn("Can't break at that line\n");
1122 magic_getarylen(SV *sv, MAGIC *mg)
1125 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1130 magic_setarylen(SV *sv, MAGIC *mg)
1133 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1138 magic_getpos(SV *sv, MAGIC *mg)
1140 SV* lsv = LvTARG(sv);
1142 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1143 mg = mg_find(lsv, 'g');
1144 if (mg && mg->mg_len >= 0) {
1146 sv_setiv(sv, mg->mg_len + PL_curcop->cop_arybase);
1155 magic_setpos(SV *sv, MAGIC *mg)
1157 SV* lsv = LvTARG(sv);
1163 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1164 mg = mg_find(lsv, 'g');
1168 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1169 mg = mg_find(lsv, 'g');
1171 else if (!SvOK(sv)) {
1175 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1177 WITH_THR(pos = SvIV(sv) - PL_curcop->cop_arybase);
1186 mg->mg_flags &= ~MGf_MINMATCH;
1192 magic_getglob(SV *sv, MAGIC *mg)
1194 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1196 gv_efullname3(sv,((GV*)sv), "*");
1200 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1205 magic_setglob(SV *sv, MAGIC *mg)
1214 if (*s == '*' && s[1])
1216 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1221 GvGP(sv) = gp_ref(GvGP(gv));
1226 magic_getsubstr(SV *sv, MAGIC *mg)
1229 SV *lsv = LvTARG(sv);
1230 char *tmps = SvPV(lsv,len);
1231 I32 offs = LvTARGOFF(sv);
1232 I32 rem = LvTARGLEN(sv);
1236 if (rem + offs > len)
1238 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1243 magic_setsubstr(SV *sv, MAGIC *mg)
1246 char *tmps = SvPV(sv,len);
1247 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1252 magic_gettaint(SV *sv, MAGIC *mg)
1255 TAINT_IF((mg->mg_len & 1) ||
1256 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1261 magic_settaint(SV *sv, MAGIC *mg)
1264 if (PL_localizing) {
1265 if (PL_localizing == 1)
1270 else if (PL_tainted)
1278 magic_getvec(SV *sv, MAGIC *mg)
1280 SV *lsv = LvTARG(sv);
1282 unsigned long retnum;
1292 s = (unsigned char *) SvPV(lsv, lsvlen);
1293 offset = LvTARGOFF(sv);
1294 size = LvTARGLEN(sv);
1295 len = (offset + size + 7) / 8;
1297 /* Copied from pp_vec() */
1305 if (offset >= lsvlen)
1308 retnum = (unsigned long) s[offset] << 8;
1310 else if (size == 32) {
1311 if (offset >= lsvlen)
1313 else if (offset + 1 >= lsvlen)
1314 retnum = (unsigned long) s[offset] << 24;
1315 else if (offset + 2 >= lsvlen)
1316 retnum = ((unsigned long) s[offset] << 24) +
1317 ((unsigned long) s[offset + 1] << 16);
1319 retnum = ((unsigned long) s[offset] << 24) +
1320 ((unsigned long) s[offset + 1] << 16) +
1321 (s[offset + 2] << 8);
1326 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1331 else if (size == 16)
1332 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1333 else if (size == 32)
1334 retnum = ((unsigned long) s[offset] << 24) +
1335 ((unsigned long) s[offset + 1] << 16) +
1336 (s[offset + 2] << 8) + s[offset+3];
1339 sv_setuv(sv, (UV)retnum);
1344 magic_setvec(SV *sv, MAGIC *mg)
1346 do_vecset(sv); /* XXX slurp this routine */
1351 magic_getdefelem(SV *sv, MAGIC *mg)
1354 if (LvTARGLEN(sv)) {
1356 SV *ahv = LvTARG(sv);
1357 if (SvTYPE(ahv) == SVt_PVHV) {
1358 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1363 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1369 AV* av = (AV*)LvTARG(sv);
1370 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1371 targ = AvARRAY(av)[LvTARGOFF(sv)];
1373 if (targ && targ != &PL_sv_undef) {
1374 dTHR; /* just for SvREFCNT_dec */
1375 /* somebody else defined it for us */
1376 SvREFCNT_dec(LvTARG(sv));
1377 LvTARG(sv) = SvREFCNT_inc(targ);
1379 SvREFCNT_dec(mg->mg_obj);
1380 mg->mg_obj = Nullsv;
1381 mg->mg_flags &= ~MGf_REFCOUNTED;
1386 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1391 magic_setdefelem(SV *sv, MAGIC *mg)
1396 sv_setsv(LvTARG(sv), sv);
1397 SvSETMAGIC(LvTARG(sv));
1403 vivify_defelem(SV *sv)
1405 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1409 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1412 SV *ahv = LvTARG(sv);
1413 if (SvTYPE(ahv) == SVt_PVHV) {
1414 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1419 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1423 if (!value || value == &PL_sv_undef) {
1425 croak(no_helem, SvPV(mg->mg_obj, n_a));
1429 AV* av = (AV*)LvTARG(sv);
1430 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1431 LvTARG(sv) = Nullsv; /* array can't be extended */
1433 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1434 if (!svp || (value = *svp) == &PL_sv_undef)
1435 croak(no_aelem, (I32)LvTARGOFF(sv));
1438 (void)SvREFCNT_inc(value);
1439 SvREFCNT_dec(LvTARG(sv));
1442 SvREFCNT_dec(mg->mg_obj);
1443 mg->mg_obj = Nullsv;
1444 mg->mg_flags &= ~MGf_REFCOUNTED;
1448 magic_setmglob(SV *sv, MAGIC *mg)
1456 magic_setbm(SV *sv, MAGIC *mg)
1458 sv_unmagic(sv, 'B');
1464 magic_setfm(SV *sv, MAGIC *mg)
1466 sv_unmagic(sv, 'f');
1472 magic_setuvar(SV *sv, MAGIC *mg)
1474 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1476 if (uf && uf->uf_set)
1477 (*uf->uf_set)(uf->uf_index, sv);
1482 magic_freeregexp(SV *sv, MAGIC *mg)
1484 regexp *re = (regexp *)mg->mg_obj;
1489 #ifdef USE_LOCALE_COLLATE
1491 magic_setcollxfrm(SV *sv, MAGIC *mg)
1494 * René Descartes said "I think not."
1495 * and vanished with a faint plop.
1498 Safefree(mg->mg_ptr);
1504 #endif /* USE_LOCALE_COLLATE */
1507 magic_set(SV *sv, MAGIC *mg)
1513 switch (*mg->mg_ptr) {
1514 case '\001': /* ^A */
1515 sv_setsv(PL_bodytarget, sv);
1517 case '\004': /* ^D */
1518 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1519 DEBUG_x(dump_all());
1521 case '\005': /* ^E */
1523 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1526 SetLastError( SvIV(sv) );
1528 /* will anyone ever use this? */
1529 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1533 case '\006': /* ^F */
1534 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1536 case '\010': /* ^H */
1537 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1539 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1541 Safefree(PL_inplace);
1543 PL_inplace = savepv(SvPV(sv,len));
1545 PL_inplace = Nullch;
1547 case '\017': /* ^O */
1549 Safefree(PL_osname);
1551 PL_osname = savepv(SvPV(sv,len));
1555 case '\020': /* ^P */
1556 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1558 case '\024': /* ^T */
1560 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1562 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1565 case '\027': /* ^W */
1566 PL_dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1569 if (PL_localizing) {
1570 if (PL_localizing == 1)
1571 save_sptr((SV**)&PL_last_in_gv);
1573 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1574 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1577 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1578 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1579 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1582 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1583 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1584 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1587 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1590 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1591 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1592 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1595 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1599 IO *io = GvIOp(PL_defoutgv);
1600 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1601 IoFLAGS(io) &= ~IOf_FLUSH;
1603 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1604 PerlIO *ofp = IoOFP(io);
1606 (void)PerlIO_flush(ofp);
1607 IoFLAGS(io) |= IOf_FLUSH;
1613 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1614 PL_multiline = (i != 0);
1617 SvREFCNT_dec(PL_nrs);
1618 PL_nrs = newSVsv(sv);
1619 SvREFCNT_dec(PL_rs);
1620 PL_rs = SvREFCNT_inc(PL_nrs);
1625 if (SvOK(sv) || SvGMAGICAL(sv))
1626 PL_ors = savepv(SvPV(sv,PL_orslen));
1635 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1640 PL_ofmt = savepv(SvPV(sv,len));
1643 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1646 #ifdef COMPLEX_STATUS
1647 if (PL_localizing == 2) {
1648 PL_statusvalue = LvTARGOFF(sv);
1649 PL_statusvalue_vms = LvTARGLEN(sv);
1653 #ifdef VMSISH_STATUS
1655 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1658 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1661 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1662 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1665 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1666 if (PL_delaymagic) {
1667 PL_delaymagic |= DM_RUID;
1668 break; /* don't do magic till later */
1671 (void)setruid((Uid_t)PL_uid);
1674 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1676 #ifdef HAS_SETRESUID
1677 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1679 if (PL_uid == PL_euid) /* special case $< = $> */
1680 (void)PerlProc_setuid(PL_uid);
1682 PL_uid = (I32)PerlProc_getuid();
1683 croak("setruid() not implemented");
1688 PL_uid = (I32)PerlProc_getuid();
1689 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1692 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1693 if (PL_delaymagic) {
1694 PL_delaymagic |= DM_EUID;
1695 break; /* don't do magic till later */
1698 (void)seteuid((Uid_t)PL_euid);
1701 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1703 #ifdef HAS_SETRESUID
1704 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1706 if (PL_euid == PL_uid) /* special case $> = $< */
1707 PerlProc_setuid(PL_euid);
1709 PL_euid = (I32)PerlProc_geteuid();
1710 croak("seteuid() not implemented");
1715 PL_euid = (I32)PerlProc_geteuid();
1716 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1719 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1720 if (PL_delaymagic) {
1721 PL_delaymagic |= DM_RGID;
1722 break; /* don't do magic till later */
1725 (void)setrgid((Gid_t)PL_gid);
1728 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1730 #ifdef HAS_SETRESGID
1731 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1733 if (PL_gid == PL_egid) /* special case $( = $) */
1734 (void)PerlProc_setgid(PL_gid);
1736 PL_gid = (I32)PerlProc_getgid();
1737 croak("setrgid() not implemented");
1742 PL_gid = (I32)PerlProc_getgid();
1743 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1746 #ifdef HAS_SETGROUPS
1748 char *p = SvPV(sv, len);
1749 Groups_t gary[NGROUPS];
1751 SET_NUMERIC_STANDARD();
1754 PL_egid = I_V(atof(p));
1755 for (i = 0; i < NGROUPS; ++i) {
1756 while (*p && !isSPACE(*p))
1762 gary[i] = I_V(atof(p));
1765 (void)setgroups(i, gary);
1767 #else /* HAS_SETGROUPS */
1768 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1769 #endif /* HAS_SETGROUPS */
1770 if (PL_delaymagic) {
1771 PL_delaymagic |= DM_EGID;
1772 break; /* don't do magic till later */
1775 (void)setegid((Gid_t)PL_egid);
1778 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1780 #ifdef HAS_SETRESGID
1781 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1783 if (PL_egid == PL_gid) /* special case $) = $( */
1784 (void)PerlProc_setgid(PL_egid);
1786 PL_egid = (I32)PerlProc_getegid();
1787 croak("setegid() not implemented");
1792 PL_egid = (I32)PerlProc_getegid();
1793 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1796 PL_chopset = SvPV_force(sv,len);
1802 /* See if all the arguments are contiguous in memory */
1803 for (i = 1; i < PL_origargc; i++) {
1804 if (PL_origargv[i] == s + 1
1806 || PL_origargv[i] == s + 2
1811 s += strlen(s); /* this one is ok too */
1816 /* can grab env area too? */
1817 if (PL_origenviron && (PL_origenviron[0] == s + 1
1819 || (PL_origenviron[0] == s + 9 && (s += 8))
1822 my_setenv("NoNe SuCh", Nullch);
1823 /* force copy of environment */
1824 for (i = 0; PL_origenviron[i]; i++)
1825 if (PL_origenviron[i] == s + 1) {
1832 PL_origalen = s - PL_origargv[0];
1834 s = SvPV_force(sv,len);
1836 if (i >= PL_origalen) {
1838 /* don't allow system to limit $0 seen by script */
1839 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1840 Copy(s, PL_origargv[0], i, char);
1841 s = PL_origargv[0]+i;
1845 Copy(s, PL_origargv[0], i, char);
1846 s = PL_origargv[0]+i;
1848 while (++i < PL_origalen)
1850 s = PL_origargv[0]+i;
1851 for (i = 1; i < PL_origargc; i++)
1852 PL_origargv[i] = Nullch;
1857 sv_setsv(thr->errsv, sv);
1859 #endif /* USE_THREADS */
1866 magic_mutexfree(SV *sv, MAGIC *mg)
1869 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1870 (unsigned long)thr, (unsigned long)sv);)
1872 croak("panic: magic_mutexfree");
1873 MUTEX_DESTROY(MgMUTEXP(mg));
1874 COND_DESTROY(MgCONDP(mg));
1877 #endif /* USE_THREADS */
1882 register char **sigv;
1884 for (sigv = sig_name+1; *sigv; sigv++)
1885 if (strEQ(sig,*sigv))
1886 return sig_num[sigv - sig_name];
1888 if (strEQ(sig,"CHLD"))
1892 if (strEQ(sig,"CLD"))
1901 unwind_handler_stack(void *p)
1904 U32 flags = *(U32*)p;
1907 PL_savestack_ix -= 5; /* Unprotect save in progress. */
1908 /* cxstack_ix-- Not needed, die already unwound it. */
1910 SvREFCNT_dec(sig_sv);
1919 SV *sv, *tSv = PL_Sv;
1923 I32 o_save_i = PL_savestack_ix, type;
1926 if (PL_savestack_ix + 15 <= PL_savestack_max)
1928 if (PL_markstack_ptr < PL_markstack_max - 2)
1930 if (PL_retstack_ix < PL_retstack_max - 2)
1932 if (PL_scopestack_ix < PL_scopestack_max - 3)
1936 die("Signal SIG%s received, but no signal handler set.\n",
1939 /* Max number of items pushed there is 3*n or 4. We cannot fix
1940 infinity, so we fix 4 (in fact 5): */
1942 PL_savestack_ix += 5; /* Protect save in progress. */
1943 o_save_i = PL_savestack_ix;
1944 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
1947 PL_markstack_ptr++; /* Protect mark. */
1950 PL_retstack[PL_retstack_ix] = NULL;
1953 PL_scopestack_ix += 1;
1954 /* sv_2cv is too complicated, try a simpler variant first: */
1955 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
1956 || SvTYPE(cv) != SVt_PVCV)
1957 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1959 if (!cv || !CvROOT(cv)) {
1961 warn("SIG%s handler \"%s\" not defined.\n",
1962 sig_name[sig], (gv ? GvENAME(gv)
1969 if(psig_name[sig]) {
1970 sv = SvREFCNT_inc(psig_name[sig]);
1974 sv = sv_newmortal();
1975 sv_setpv(sv,sig_name[sig]);
1978 PUSHSTACKi(PERLSI_SIGNAL);
1983 perl_call_sv((SV*)cv, G_DISCARD);
1988 PL_savestack_ix -= 8; /* Unprotect save in progress. */
1994 PL_scopestack_ix -= 1;
1997 PL_op = myop; /* Apparently not needed... */
1999 PL_Sv = tSv; /* Restore global temporaries. */