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)) {
251 sv_magic(nsv, mg->mg_obj, toLOWER(mg->mg_type), key, klen);
263 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
264 MGVTBL* vtbl = mg->mg_virtual;
265 moremagic = mg->mg_moremagic;
266 if (vtbl && (vtbl->svt_free != NULL))
267 (VTBL->svt_free)(sv, mg);
268 if (mg->mg_ptr && mg->mg_type != 'g')
270 Safefree(mg->mg_ptr);
271 else if (mg->mg_len == HEf_SVKEY)
272 SvREFCNT_dec((SV*)mg->mg_ptr);
273 if (mg->mg_flags & MGf_REFCOUNTED)
274 SvREFCNT_dec(mg->mg_obj);
281 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
286 magic_len(SV *sv, MAGIC *mg)
295 switch (*mg->mg_ptr) {
296 case '1': case '2': case '3': case '4':
297 case '5': case '6': case '7': case '8': case '9': case '&':
298 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
299 paren = atoi(mg->mg_ptr);
301 if (paren <= rx->nparens &&
302 (s = rx->startp[paren]) &&
303 (t = rx->endp[paren]))
312 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
313 paren = rx->lastparen;
319 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
320 if ((s = rx->subbeg) && rx->startp[0]) {
321 i = rx->startp[0] - s;
328 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
329 if (rx->subend && (s = rx->endp[0])) {
337 return (STRLEN)PL_ofslen;
339 return (STRLEN)PL_orslen;
342 if (!SvPOK(sv) && SvNIOK(sv))
350 magic_get(SV *sv, MAGIC *mg)
359 switch (*mg->mg_ptr) {
360 case '\001': /* ^A */
361 sv_setsv(sv, PL_bodytarget);
363 case '\004': /* ^D */
364 sv_setiv(sv, (IV)(PL_debug & 32767));
366 case '\005': /* ^E */
369 # include <descrip.h>
370 # include <starlet.h>
372 $DESCRIPTOR(msgdsc,msg);
373 sv_setnv(sv,(double) vaxc$errno);
374 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
375 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
381 if (!(_emx_env & 0x200)) { /* Under DOS */
382 sv_setnv(sv, (double)errno);
383 sv_setpv(sv, errno ? Strerror(errno) : "");
385 if (errno != errno_isOS2)
386 Perl_rc = _syserrno();
387 sv_setnv(sv, (double)Perl_rc);
388 sv_setpv(sv, os2error(Perl_rc));
393 DWORD dwErr = GetLastError();
394 sv_setnv(sv, (double)dwErr);
400 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
401 sv_setpvn(sv, sMsg, dwLen);
402 PerlProc_FreeBuf(sMsg);
404 win32_str_os_error(sv, dwErr);
412 sv_setnv(sv, (double)errno);
413 sv_setpv(sv, errno ? Strerror(errno) : "");
417 SvNOK_on(sv); /* what a wonderful hack! */
419 case '\006': /* ^F */
420 sv_setiv(sv, (IV)PL_maxsysfd);
422 case '\010': /* ^H */
423 sv_setiv(sv, (IV)PL_hints);
425 case '\011': /* ^I */ /* NOT \t in EBCDIC */
427 sv_setpv(sv, PL_inplace);
429 sv_setsv(sv, &PL_sv_undef);
431 case '\017': /* ^O */
432 sv_setpv(sv, PL_osname);
434 case '\020': /* ^P */
435 sv_setiv(sv, (IV)PL_perldb);
437 case '\023': /* ^S */
440 if (PL_lex_state != LEX_NOTPARSING)
448 case '\024': /* ^T */
450 sv_setnv(sv, PL_basetime);
452 sv_setiv(sv, (IV)PL_basetime);
455 case '\027': /* ^W */
456 sv_setiv(sv, (IV)PL_dowarn);
458 case '1': case '2': case '3': case '4':
459 case '5': case '6': case '7': case '8': case '9': case '&':
460 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
462 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
463 * XXX Does the new way break anything?
465 paren = atoi(mg->mg_ptr);
467 if (paren <= rx->nparens &&
468 (s = rx->startp[paren]) &&
469 (t = rx->endp[paren]))
476 was_tainted = PL_tainted;
481 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
486 sv_setsv(sv,&PL_sv_undef);
489 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
490 paren = rx->lastparen;
494 sv_setsv(sv,&PL_sv_undef);
497 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
498 if ((s = rx->subbeg) && rx->startp[0]) {
499 i = rx->startp[0] - s;
503 sv_setsv(sv,&PL_sv_undef);
506 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
507 if (rx->subend && (s = rx->endp[0])) {
512 sv_setsv(sv,&PL_sv_undef);
516 if (GvIO(PL_last_in_gv)) {
517 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
523 sv_setiv(sv, (IV)STATUS_CURRENT);
524 #ifdef COMPLEX_STATUS
525 LvTARGOFF(sv) = PL_statusvalue;
526 LvTARGLEN(sv) = PL_statusvalue_vms;
531 s = IoTOP_NAME(GvIOp(PL_defoutgv));
535 sv_setpv(sv,GvENAME(PL_defoutgv));
540 s = IoFMT_NAME(GvIOp(PL_defoutgv));
542 s = GvENAME(PL_defoutgv);
547 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
550 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
553 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
561 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
564 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
567 sv_setpvn(sv,PL_ofs,PL_ofslen);
570 sv_setpvn(sv,PL_ors,PL_orslen);
573 sv_setpv(sv,PL_ofmt);
577 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
578 sv_setpv(sv, errno ? Strerror(errno) : "");
581 int saveerrno = errno;
582 sv_setnv(sv, (double)errno);
584 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
587 sv_setpv(sv, errno ? Strerror(errno) : "");
591 SvNOK_on(sv); /* what a wonderful hack! */
594 sv_setiv(sv, (IV)PL_uid);
597 sv_setiv(sv, (IV)PL_euid);
600 sv_setiv(sv, (IV)PL_gid);
601 sv_setpvf(sv, "%Vd", (IV)PL_gid);
604 sv_setiv(sv, (IV)PL_egid);
605 sv_setpvf(sv, "%Vd", (IV)PL_egid);
609 Groups_t gary[NGROUPS];
610 i = getgroups(NGROUPS,gary);
612 sv_catpvf(sv, " %Vd", (IV)gary[i]);
615 SvIOK_on(sv); /* what a wonderful hack! */
623 sv_setsv(sv, thr->errsv);
625 #endif /* USE_THREADS */
631 magic_getuvar(SV *sv, MAGIC *mg)
633 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
635 if (uf && uf->uf_val)
636 (*uf->uf_val)(uf->uf_index, sv);
641 magic_setenv(SV *sv, MAGIC *mg)
652 #ifdef DYNAMIC_ENV_FETCH
653 /* We just undefd an environment var. Is a replacement */
654 /* waiting in the wings? */
657 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
658 s = SvPV(*valp, len);
662 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
663 /* And you'll never guess what the dog had */
664 /* in its mouth... */
666 MgTAINTEDDIR_off(mg);
668 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
669 char pathbuf[256], eltbuf[256], *cp, *elt = s;
673 do { /* DCL$PATH may be a search list */
674 while (1) { /* as may dev portion of any element */
675 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
676 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
677 cando_by_name(S_IWUSR,0,elt) ) {
682 if ((cp = strchr(elt, ':')) != Nullch)
684 if (my_trnlnm(elt, eltbuf, j++))
690 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
693 if (s && klen == 4 && strEQ(ptr,"PATH")) {
694 char *strend = s + len;
699 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
702 if (i >= sizeof tmpbuf /* too long -- assume the worst */
704 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
711 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
717 magic_clearenv(SV *sv, MAGIC *mg)
719 my_setenv(MgPV(mg,PL_na),Nullch);
724 magic_set_all_env(SV *sv, MAGIC *mg)
727 die("Can't make list assignment to %%ENV on this system");
732 magic_clear_all_env(sv,mg);
733 hv_iterinit((HV*)sv);
734 while (entry = hv_iternext((HV*)sv)) {
736 my_setenv(hv_iterkey(entry, &keylen),
737 SvPV(hv_iterval((HV*)sv, entry), PL_na));
745 magic_clear_all_env(SV *sv, MAGIC *mg)
748 die("Can't make list assignment to %%ENV on this system");
751 char *envv = GetEnvironmentStrings();
755 char *end = strchr(cur,'=');
756 if (end && end != cur) {
758 my_setenv(cur,Nullch);
760 cur += strlen(end+1)+1;
762 else if ((len = strlen(cur)))
765 FreeEnvironmentStrings(envv);
769 if (environ == PL_origenviron)
770 New(901, environ, 1, char*);
772 for (i = 0; environ[i]; i++)
773 Safefree(environ[i]);
782 magic_getsig(SV *sv, MAGIC *mg)
785 /* Are we fetching a signal entry? */
786 i = whichsig(MgPV(mg,PL_na));
789 sv_setsv(sv,psig_ptr[i]);
791 Sighandler_t sigstate = rsignal_state(i);
793 /* cache state so we don't fetch it again */
794 if(sigstate == SIG_IGN)
795 sv_setpv(sv,"IGNORE");
797 sv_setsv(sv,&PL_sv_undef);
798 psig_ptr[i] = SvREFCNT_inc(sv);
805 magic_clearsig(SV *sv, MAGIC *mg)
808 /* Are we clearing a signal entry? */
809 i = whichsig(MgPV(mg,PL_na));
812 SvREFCNT_dec(psig_ptr[i]);
816 SvREFCNT_dec(psig_name[i]);
824 magic_setsig(SV *sv, MAGIC *mg)
833 if (strEQ(s,"__DIE__"))
835 else if (strEQ(s,"__WARN__"))
837 else if (strEQ(s,"__PARSE__"))
840 croak("No such hook: %s", s);
848 i = whichsig(s); /* ...no, a brick */
850 if (PL_dowarn || strEQ(s,"ALARM"))
851 warn("No such signal: SIG%s", s);
854 SvREFCNT_dec(psig_name[i]);
855 SvREFCNT_dec(psig_ptr[i]);
856 psig_ptr[i] = SvREFCNT_inc(sv);
857 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
858 psig_name[i] = newSVpv(s, strlen(s));
859 SvREADONLY_on(psig_name[i]);
861 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
863 (void)rsignal(i, PL_sighandlerp);
865 *svp = SvREFCNT_inc(sv);
868 s = SvPV_force(sv,PL_na);
869 if (strEQ(s,"IGNORE")) {
871 (void)rsignal(i, SIG_IGN);
875 else if (strEQ(s,"DEFAULT") || !*s) {
877 (void)rsignal(i, SIG_DFL);
883 * We should warn if HINT_STRICT_REFS, but without
884 * access to a known hint bit in a known OP, we can't
885 * tell whether HINT_STRICT_REFS is in force or not.
887 if (!strchr(s,':') && !strchr(s,'\''))
888 sv_setpv(sv, form("main::%s", s));
890 (void)rsignal(i, PL_sighandlerp);
892 *svp = SvREFCNT_inc(sv);
898 magic_setisa(SV *sv, MAGIC *mg)
907 magic_setamagic(SV *sv, MAGIC *mg)
909 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
910 PL_amagic_generation++;
914 #endif /* OVERLOAD */
917 magic_getnkeys(SV *sv, MAGIC *mg)
919 HV *hv = (HV*)LvTARG(sv);
924 (void) hv_iterinit(hv);
925 if (!SvRMAGICAL(hv) || !mg_find((SV*)hv,'P'))
929 while (entry = hv_iternext(hv)) {
940 magic_setnkeys(SV *sv, MAGIC *mg)
943 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
948 /* caller is responsible for stack switching/cleanup */
950 magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
960 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
961 else if (mg->mg_len == HEf_SVKEY)
962 PUSHs((SV*)mg->mg_ptr);
964 else if (mg->mg_type == 'p') {
965 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
973 return perl_call_method(meth, flags);
977 magic_methpack(SV *sv, MAGIC *mg, char *meth)
983 PUSHSTACKi(PERLSI_MAGIC);
985 if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
986 sv_setsv(sv, *PL_stack_sp--);
996 magic_getpack(SV *sv, MAGIC *mg)
998 magic_methpack(sv,mg,"FETCH");
1000 mg->mg_flags |= MGf_GSKIP;
1005 magic_setpack(SV *sv, MAGIC *mg)
1009 PUSHSTACKi(PERLSI_MAGIC);
1010 magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1017 magic_clearpack(SV *sv, MAGIC *mg)
1019 return magic_methpack(sv,mg,"DELETE");
1024 magic_sizepack(SV *sv, MAGIC *mg)
1031 PUSHSTACKi(PERLSI_MAGIC);
1032 if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1033 sv = *PL_stack_sp--;
1034 retval = (U32) SvIV(sv)-1;
1042 int magic_wipepack(SV *sv, MAGIC *mg)
1047 PUSHSTACKi(PERLSI_MAGIC);
1051 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1058 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1061 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1065 PUSHSTACKi(PERLSI_MAGIC);
1073 if (perl_call_method(meth, G_SCALAR))
1074 sv_setsv(key, *PL_stack_sp--);
1083 magic_existspack(SV *sv, MAGIC *mg)
1085 return magic_methpack(sv,mg,"EXISTS");
1089 magic_setdbline(SV *sv, MAGIC *mg)
1099 svp = av_fetch(GvAV(gv),
1100 atoi(MgPV(mg,PL_na)), FALSE);
1101 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1104 warn("Can't break at that line\n");
1109 magic_getarylen(SV *sv, MAGIC *mg)
1112 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1117 magic_setarylen(SV *sv, MAGIC *mg)
1120 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1125 magic_getpos(SV *sv, MAGIC *mg)
1127 SV* lsv = LvTARG(sv);
1129 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1130 mg = mg_find(lsv, 'g');
1131 if (mg && mg->mg_len >= 0) {
1133 sv_setiv(sv, mg->mg_len + PL_curcop->cop_arybase);
1142 magic_setpos(SV *sv, MAGIC *mg)
1144 SV* lsv = LvTARG(sv);
1150 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1151 mg = mg_find(lsv, 'g');
1155 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1156 mg = mg_find(lsv, 'g');
1158 else if (!SvOK(sv)) {
1162 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1164 WITH_THR(pos = SvIV(sv) - PL_curcop->cop_arybase);
1173 mg->mg_flags &= ~MGf_MINMATCH;
1179 magic_getglob(SV *sv, MAGIC *mg)
1181 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1183 gv_efullname3(sv,((GV*)sv), "*");
1187 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1192 magic_setglob(SV *sv, MAGIC *mg)
1199 s = SvPV(sv, PL_na);
1200 if (*s == '*' && s[1])
1202 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1207 GvGP(sv) = gp_ref(GvGP(gv));
1212 magic_getsubstr(SV *sv, MAGIC *mg)
1215 SV *lsv = LvTARG(sv);
1216 char *tmps = SvPV(lsv,len);
1217 I32 offs = LvTARGOFF(sv);
1218 I32 rem = LvTARGLEN(sv);
1222 if (rem + offs > len)
1224 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1229 magic_setsubstr(SV *sv, MAGIC *mg)
1232 char *tmps = SvPV(sv,len);
1233 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1238 magic_gettaint(SV *sv, MAGIC *mg)
1241 TAINT_IF((mg->mg_len & 1) ||
1242 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1247 magic_settaint(SV *sv, MAGIC *mg)
1250 if (PL_localizing) {
1251 if (PL_localizing == 1)
1256 else if (PL_tainted)
1264 magic_getvec(SV *sv, MAGIC *mg)
1266 SV *lsv = LvTARG(sv);
1268 unsigned long retnum;
1278 s = (unsigned char *) SvPV(lsv, lsvlen);
1279 offset = LvTARGOFF(sv);
1280 size = LvTARGLEN(sv);
1281 len = (offset + size + 7) / 8;
1283 /* Copied from pp_vec() */
1291 if (offset >= lsvlen)
1294 retnum = (unsigned long) s[offset] << 8;
1296 else if (size == 32) {
1297 if (offset >= lsvlen)
1299 else if (offset + 1 >= lsvlen)
1300 retnum = (unsigned long) s[offset] << 24;
1301 else if (offset + 2 >= lsvlen)
1302 retnum = ((unsigned long) s[offset] << 24) +
1303 ((unsigned long) s[offset + 1] << 16);
1305 retnum = ((unsigned long) s[offset] << 24) +
1306 ((unsigned long) s[offset + 1] << 16) +
1307 (s[offset + 2] << 8);
1312 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1317 else if (size == 16)
1318 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1319 else if (size == 32)
1320 retnum = ((unsigned long) s[offset] << 24) +
1321 ((unsigned long) s[offset + 1] << 16) +
1322 (s[offset + 2] << 8) + s[offset+3];
1325 sv_setuv(sv, (UV)retnum);
1330 magic_setvec(SV *sv, MAGIC *mg)
1332 do_vecset(sv); /* XXX slurp this routine */
1337 magic_getdefelem(SV *sv, MAGIC *mg)
1340 if (LvTARGLEN(sv)) {
1342 SV *ahv = LvTARG(sv);
1343 if (SvTYPE(ahv) == SVt_PVHV) {
1344 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1349 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1355 AV* av = (AV*)LvTARG(sv);
1356 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1357 targ = AvARRAY(av)[LvTARGOFF(sv)];
1359 if (targ && targ != &PL_sv_undef) {
1360 dTHR; /* just for SvREFCNT_dec */
1361 /* somebody else defined it for us */
1362 SvREFCNT_dec(LvTARG(sv));
1363 LvTARG(sv) = SvREFCNT_inc(targ);
1365 SvREFCNT_dec(mg->mg_obj);
1366 mg->mg_obj = Nullsv;
1367 mg->mg_flags &= ~MGf_REFCOUNTED;
1372 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1377 magic_setdefelem(SV *sv, MAGIC *mg)
1382 sv_setsv(LvTARG(sv), sv);
1383 SvSETMAGIC(LvTARG(sv));
1389 vivify_defelem(SV *sv)
1391 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1395 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1398 SV *ahv = LvTARG(sv);
1399 if (SvTYPE(ahv) == SVt_PVHV) {
1400 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1405 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1409 if (!value || value == &PL_sv_undef)
1410 croak(no_helem, SvPV(mg->mg_obj, PL_na));
1413 AV* av = (AV*)LvTARG(sv);
1414 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1415 LvTARG(sv) = Nullsv; /* array can't be extended */
1417 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1418 if (!svp || (value = *svp) == &PL_sv_undef)
1419 croak(no_aelem, (I32)LvTARGOFF(sv));
1422 (void)SvREFCNT_inc(value);
1423 SvREFCNT_dec(LvTARG(sv));
1426 SvREFCNT_dec(mg->mg_obj);
1427 mg->mg_obj = Nullsv;
1428 mg->mg_flags &= ~MGf_REFCOUNTED;
1432 magic_setmglob(SV *sv, MAGIC *mg)
1440 magic_setbm(SV *sv, MAGIC *mg)
1442 sv_unmagic(sv, 'B');
1448 magic_setfm(SV *sv, MAGIC *mg)
1450 sv_unmagic(sv, 'f');
1456 magic_setuvar(SV *sv, MAGIC *mg)
1458 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1460 if (uf && uf->uf_set)
1461 (*uf->uf_set)(uf->uf_index, sv);
1466 magic_freeregexp(SV *sv, MAGIC *mg)
1468 regexp *re = (regexp *)mg->mg_obj;
1473 #ifdef USE_LOCALE_COLLATE
1475 magic_setcollxfrm(SV *sv, MAGIC *mg)
1478 * René Descartes said "I think not."
1479 * and vanished with a faint plop.
1482 Safefree(mg->mg_ptr);
1488 #endif /* USE_LOCALE_COLLATE */
1491 magic_set(SV *sv, MAGIC *mg)
1497 switch (*mg->mg_ptr) {
1498 case '\001': /* ^A */
1499 sv_setsv(PL_bodytarget, sv);
1501 case '\004': /* ^D */
1502 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1503 DEBUG_x(dump_all());
1505 case '\005': /* ^E */
1507 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1510 SetLastError( SvIV(sv) );
1512 /* will anyone ever use this? */
1513 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1517 case '\006': /* ^F */
1518 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1520 case '\010': /* ^H */
1521 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1523 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1525 Safefree(PL_inplace);
1527 PL_inplace = savepv(SvPV(sv,PL_na));
1529 PL_inplace = Nullch;
1531 case '\017': /* ^O */
1533 Safefree(PL_osname);
1535 PL_osname = savepv(SvPV(sv,PL_na));
1539 case '\020': /* ^P */
1540 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1542 case '\024': /* ^T */
1544 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1546 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1549 case '\027': /* ^W */
1550 PL_dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1553 if (PL_localizing) {
1554 if (PL_localizing == 1)
1555 save_sptr((SV**)&PL_last_in_gv);
1557 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1558 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1561 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1562 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1563 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1566 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1567 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1568 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1571 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1574 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1575 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1576 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1579 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1583 IO *io = GvIOp(PL_defoutgv);
1584 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1585 IoFLAGS(io) &= ~IOf_FLUSH;
1587 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1588 PerlIO *ofp = IoOFP(io);
1590 (void)PerlIO_flush(ofp);
1591 IoFLAGS(io) |= IOf_FLUSH;
1597 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1598 PL_multiline = (i != 0);
1601 SvREFCNT_dec(PL_nrs);
1602 PL_nrs = newSVsv(sv);
1603 SvREFCNT_dec(PL_rs);
1604 PL_rs = SvREFCNT_inc(PL_nrs);
1609 if (SvOK(sv) || SvGMAGICAL(sv))
1610 PL_ors = savepv(SvPV(sv,PL_orslen));
1619 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1624 PL_ofmt = savepv(SvPV(sv,PL_na));
1627 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1630 #ifdef COMPLEX_STATUS
1631 if (PL_localizing == 2) {
1632 PL_statusvalue = LvTARGOFF(sv);
1633 PL_statusvalue_vms = LvTARGLEN(sv);
1637 #ifdef VMSISH_STATUS
1639 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1642 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1645 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1646 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1649 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1650 if (PL_delaymagic) {
1651 PL_delaymagic |= DM_RUID;
1652 break; /* don't do magic till later */
1655 (void)setruid((Uid_t)PL_uid);
1658 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1660 #ifdef HAS_SETRESUID
1661 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1663 if (PL_uid == PL_euid) /* special case $< = $> */
1664 (void)PerlProc_setuid(PL_uid);
1666 PL_uid = (I32)PerlProc_getuid();
1667 croak("setruid() not implemented");
1672 PL_uid = (I32)PerlProc_getuid();
1673 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1676 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1677 if (PL_delaymagic) {
1678 PL_delaymagic |= DM_EUID;
1679 break; /* don't do magic till later */
1682 (void)seteuid((Uid_t)PL_euid);
1685 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1687 #ifdef HAS_SETRESUID
1688 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1690 if (PL_euid == PL_uid) /* special case $> = $< */
1691 PerlProc_setuid(PL_euid);
1693 PL_euid = (I32)PerlProc_geteuid();
1694 croak("seteuid() not implemented");
1699 PL_euid = (I32)PerlProc_geteuid();
1700 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1703 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1704 if (PL_delaymagic) {
1705 PL_delaymagic |= DM_RGID;
1706 break; /* don't do magic till later */
1709 (void)setrgid((Gid_t)PL_gid);
1712 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1714 #ifdef HAS_SETRESGID
1715 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1717 if (PL_gid == PL_egid) /* special case $( = $) */
1718 (void)PerlProc_setgid(PL_gid);
1720 PL_gid = (I32)PerlProc_getgid();
1721 croak("setrgid() not implemented");
1726 PL_gid = (I32)PerlProc_getgid();
1727 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1730 #ifdef HAS_SETGROUPS
1732 char *p = SvPV(sv, PL_na);
1733 Groups_t gary[NGROUPS];
1735 SET_NUMERIC_STANDARD();
1738 PL_egid = I_V(atof(p));
1739 for (i = 0; i < NGROUPS; ++i) {
1740 while (*p && !isSPACE(*p))
1746 gary[i] = I_V(atof(p));
1749 (void)setgroups(i, gary);
1751 #else /* HAS_SETGROUPS */
1752 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1753 #endif /* HAS_SETGROUPS */
1754 if (PL_delaymagic) {
1755 PL_delaymagic |= DM_EGID;
1756 break; /* don't do magic till later */
1759 (void)setegid((Gid_t)PL_egid);
1762 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1764 #ifdef HAS_SETRESGID
1765 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1767 if (PL_egid == PL_gid) /* special case $) = $( */
1768 (void)PerlProc_setgid(PL_egid);
1770 PL_egid = (I32)PerlProc_getegid();
1771 croak("setegid() not implemented");
1776 PL_egid = (I32)PerlProc_getegid();
1777 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1780 PL_chopset = SvPV_force(sv,PL_na);
1786 /* See if all the arguments are contiguous in memory */
1787 for (i = 1; i < PL_origargc; i++) {
1788 if (PL_origargv[i] == s + 1
1790 || PL_origargv[i] == s + 2
1793 s += strlen(++s); /* this one is ok too */
1797 /* can grab env area too? */
1798 if (PL_origenviron && (PL_origenviron[0] == s + 1
1800 || (PL_origenviron[0] == s + 9 && (s += 8))
1803 my_setenv("NoNe SuCh", Nullch);
1804 /* force copy of environment */
1805 for (i = 0; PL_origenviron[i]; i++)
1806 if (PL_origenviron[i] == s + 1)
1811 PL_origalen = s - PL_origargv[0];
1813 s = SvPV_force(sv,len);
1815 if (i >= PL_origalen) {
1817 /* don't allow system to limit $0 seen by script */
1818 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1819 Copy(s, PL_origargv[0], i, char);
1820 s = PL_origargv[0]+i;
1824 Copy(s, PL_origargv[0], i, char);
1825 s = PL_origargv[0]+i;
1827 while (++i < PL_origalen)
1829 s = PL_origargv[0]+i;
1830 for (i = 1; i < PL_origargc; i++)
1831 PL_origargv[i] = Nullch;
1836 sv_setsv(thr->errsv, sv);
1838 #endif /* USE_THREADS */
1845 magic_mutexfree(SV *sv, MAGIC *mg)
1848 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1849 (unsigned long)thr, (unsigned long)sv);)
1851 croak("panic: magic_mutexfree");
1852 MUTEX_DESTROY(MgMUTEXP(mg));
1853 COND_DESTROY(MgCONDP(mg));
1857 #endif /* USE_THREADS */
1862 register char **sigv;
1864 for (sigv = sig_name+1; *sigv; sigv++)
1865 if (strEQ(sig,*sigv))
1866 return sig_num[sigv - sig_name];
1868 if (strEQ(sig,"CHLD"))
1872 if (strEQ(sig,"CLD"))
1881 unwind_handler_stack(void *p)
1884 U32 flags = *(U32*)p;
1887 PL_savestack_ix -= 5; /* Unprotect save in progress. */
1888 /* cxstack_ix-- Not needed, die already unwound it. */
1890 SvREFCNT_dec(sig_sv);
1899 SV *sv, *tSv = PL_Sv;
1903 I32 o_save_i = PL_savestack_ix, type;
1906 if (PL_savestack_ix + 15 <= PL_savestack_max)
1908 if (PL_markstack_ptr < PL_markstack_max - 2)
1910 if (PL_retstack_ix < PL_retstack_max - 2)
1912 if (PL_scopestack_ix < PL_scopestack_max - 3)
1916 die("Signal SIG%s received, but no signal handler set.\n",
1919 /* Max number of items pushed there is 3*n or 4. We cannot fix
1920 infinity, so we fix 4 (in fact 5): */
1922 PL_savestack_ix += 5; /* Protect save in progress. */
1923 o_save_i = PL_savestack_ix;
1924 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
1927 PL_markstack_ptr++; /* Protect mark. */
1930 PL_retstack[PL_retstack_ix] = NULL;
1933 PL_scopestack_ix += 1;
1934 /* sv_2cv is too complicated, try a simpler variant first: */
1935 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
1936 || SvTYPE(cv) != SVt_PVCV)
1937 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1939 if (!cv || !CvROOT(cv)) {
1941 warn("SIG%s handler \"%s\" not defined.\n",
1942 sig_name[sig], (gv ? GvENAME(gv)
1949 if(psig_name[sig]) {
1950 sv = SvREFCNT_inc(psig_name[sig]);
1954 sv = sv_newmortal();
1955 sv_setpv(sv,sig_name[sig]);
1958 PUSHSTACKi(PERLSI_SIGNAL);
1963 perl_call_sv((SV*)cv, G_DISCARD);
1968 PL_savestack_ix -= 8; /* Unprotect save in progress. */
1974 PL_scopestack_ix -= 1;
1977 PL_op = myop; /* Apparently not needed... */
1979 PL_Sv = tSv; /* Restore global temporaries. */