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);
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)));
524 sv_setiv(sv, (IV)STATUS_CURRENT);
525 #ifdef COMPLEX_STATUS
526 LvTARGOFF(sv) = PL_statusvalue;
527 LvTARGLEN(sv) = PL_statusvalue_vms;
532 s = IoTOP_NAME(GvIOp(PL_defoutgv));
536 sv_setpv(sv,GvENAME(PL_defoutgv));
541 s = IoFMT_NAME(GvIOp(PL_defoutgv));
543 s = GvENAME(PL_defoutgv);
548 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
551 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
554 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
562 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
565 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
568 sv_setpvn(sv,PL_ofs,PL_ofslen);
571 sv_setpvn(sv,PL_ors,PL_orslen);
574 sv_setpv(sv,PL_ofmt);
578 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
579 sv_setpv(sv, errno ? Strerror(errno) : "");
582 int saveerrno = errno;
583 sv_setnv(sv, (double)errno);
585 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
588 sv_setpv(sv, errno ? Strerror(errno) : "");
592 SvNOK_on(sv); /* what a wonderful hack! */
595 sv_setiv(sv, (IV)PL_uid);
598 sv_setiv(sv, (IV)PL_euid);
601 sv_setiv(sv, (IV)PL_gid);
602 sv_setpvf(sv, "%Vd", (IV)PL_gid);
605 sv_setiv(sv, (IV)PL_egid);
606 sv_setpvf(sv, "%Vd", (IV)PL_egid);
610 Groups_t gary[NGROUPS];
611 i = getgroups(NGROUPS,gary);
613 sv_catpvf(sv, " %Vd", (IV)gary[i]);
616 SvIOK_on(sv); /* what a wonderful hack! */
624 sv_setsv(sv, thr->errsv);
626 #endif /* USE_THREADS */
632 magic_getuvar(SV *sv, MAGIC *mg)
634 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
636 if (uf && uf->uf_val)
637 (*uf->uf_val)(uf->uf_index, sv);
642 magic_setenv(SV *sv, MAGIC *mg)
653 #ifdef DYNAMIC_ENV_FETCH
654 /* We just undefd an environment var. Is a replacement */
655 /* waiting in the wings? */
658 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
659 s = SvPV(*valp, len);
663 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
664 /* And you'll never guess what the dog had */
665 /* in its mouth... */
667 MgTAINTEDDIR_off(mg);
669 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
670 char pathbuf[256], eltbuf[256], *cp, *elt = s;
674 do { /* DCL$PATH may be a search list */
675 while (1) { /* as may dev portion of any element */
676 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
677 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
678 cando_by_name(S_IWUSR,0,elt) ) {
683 if ((cp = strchr(elt, ':')) != Nullch)
685 if (my_trnlnm(elt, eltbuf, j++))
691 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
694 if (s && klen == 4 && strEQ(ptr,"PATH")) {
695 char *strend = s + len;
700 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
703 if (i >= sizeof tmpbuf /* too long -- assume the worst */
705 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
712 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
718 magic_clearenv(SV *sv, MAGIC *mg)
720 my_setenv(MgPV(mg,PL_na),Nullch);
725 magic_set_all_env(SV *sv, MAGIC *mg)
728 die("Can't make list assignment to %%ENV on this system");
733 magic_clear_all_env(sv,mg);
734 hv_iterinit((HV*)sv);
735 while (entry = hv_iternext((HV*)sv)) {
737 my_setenv(hv_iterkey(entry, &keylen),
738 SvPV(hv_iterval((HV*)sv, entry), PL_na));
746 magic_clear_all_env(SV *sv, MAGIC *mg)
749 die("Can't make list assignment to %%ENV on this system");
752 char *envv = GetEnvironmentStrings();
756 char *end = strchr(cur,'=');
757 if (end && end != cur) {
759 my_setenv(cur,Nullch);
761 cur += strlen(end+1)+1;
763 else if ((len = strlen(cur)))
766 FreeEnvironmentStrings(envv);
770 if (environ == PL_origenviron)
771 New(901, environ, 1, char*);
773 for (i = 0; environ[i]; i++)
774 Safefree(environ[i]);
783 magic_getsig(SV *sv, MAGIC *mg)
786 /* Are we fetching a signal entry? */
787 i = whichsig(MgPV(mg,PL_na));
790 sv_setsv(sv,psig_ptr[i]);
792 Sighandler_t sigstate = rsignal_state(i);
794 /* cache state so we don't fetch it again */
795 if(sigstate == SIG_IGN)
796 sv_setpv(sv,"IGNORE");
798 sv_setsv(sv,&PL_sv_undef);
799 psig_ptr[i] = SvREFCNT_inc(sv);
806 magic_clearsig(SV *sv, MAGIC *mg)
809 /* Are we clearing a signal entry? */
810 i = whichsig(MgPV(mg,PL_na));
813 SvREFCNT_dec(psig_ptr[i]);
817 SvREFCNT_dec(psig_name[i]);
825 magic_setsig(SV *sv, MAGIC *mg)
834 if (strEQ(s,"__DIE__"))
836 else if (strEQ(s,"__WARN__"))
838 else if (strEQ(s,"__PARSE__"))
841 croak("No such hook: %s", s);
849 i = whichsig(s); /* ...no, a brick */
851 if (PL_dowarn || strEQ(s,"ALARM"))
852 warn("No such signal: SIG%s", s);
855 SvREFCNT_dec(psig_name[i]);
856 SvREFCNT_dec(psig_ptr[i]);
857 psig_ptr[i] = SvREFCNT_inc(sv);
858 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
859 psig_name[i] = newSVpv(s, strlen(s));
860 SvREADONLY_on(psig_name[i]);
862 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
864 (void)rsignal(i, PL_sighandlerp);
866 *svp = SvREFCNT_inc(sv);
869 s = SvPV_force(sv,PL_na);
870 if (strEQ(s,"IGNORE")) {
872 (void)rsignal(i, SIG_IGN);
876 else if (strEQ(s,"DEFAULT") || !*s) {
878 (void)rsignal(i, SIG_DFL);
884 * We should warn if HINT_STRICT_REFS, but without
885 * access to a known hint bit in a known OP, we can't
886 * tell whether HINT_STRICT_REFS is in force or not.
888 if (!strchr(s,':') && !strchr(s,'\''))
889 sv_setpv(sv, form("main::%s", s));
891 (void)rsignal(i, PL_sighandlerp);
893 *svp = SvREFCNT_inc(sv);
899 magic_setisa(SV *sv, MAGIC *mg)
908 magic_setamagic(SV *sv, MAGIC *mg)
910 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
911 PL_amagic_generation++;
915 #endif /* OVERLOAD */
918 magic_getnkeys(SV *sv, MAGIC *mg)
920 HV *hv = (HV*)LvTARG(sv);
925 (void) hv_iterinit(hv);
926 if (!SvRMAGICAL(hv) || !mg_find((SV*)hv,'P'))
930 while (entry = hv_iternext(hv)) {
941 magic_setnkeys(SV *sv, MAGIC *mg)
944 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
949 /* caller is responsible for stack switching/cleanup */
951 magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
961 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
962 else if (mg->mg_len == HEf_SVKEY)
963 PUSHs((SV*)mg->mg_ptr);
965 else if (mg->mg_type == 'p') {
966 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
974 return perl_call_method(meth, flags);
978 magic_methpack(SV *sv, MAGIC *mg, char *meth)
984 PUSHSTACKi(PERLSI_MAGIC);
986 if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
987 sv_setsv(sv, *PL_stack_sp--);
997 magic_getpack(SV *sv, MAGIC *mg)
999 magic_methpack(sv,mg,"FETCH");
1001 mg->mg_flags |= MGf_GSKIP;
1006 magic_setpack(SV *sv, MAGIC *mg)
1010 PUSHSTACKi(PERLSI_MAGIC);
1011 magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1018 magic_clearpack(SV *sv, MAGIC *mg)
1020 return magic_methpack(sv,mg,"DELETE");
1025 magic_sizepack(SV *sv, MAGIC *mg)
1032 PUSHSTACKi(PERLSI_MAGIC);
1033 if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1034 sv = *PL_stack_sp--;
1035 retval = (U32) SvIV(sv)-1;
1043 int magic_wipepack(SV *sv, MAGIC *mg)
1048 PUSHSTACKi(PERLSI_MAGIC);
1052 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1059 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1062 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1066 PUSHSTACKi(PERLSI_MAGIC);
1074 if (perl_call_method(meth, G_SCALAR))
1075 sv_setsv(key, *PL_stack_sp--);
1084 magic_existspack(SV *sv, MAGIC *mg)
1086 return magic_methpack(sv,mg,"EXISTS");
1090 magic_setdbline(SV *sv, MAGIC *mg)
1100 svp = av_fetch(GvAV(gv),
1101 atoi(MgPV(mg,PL_na)), FALSE);
1102 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1105 warn("Can't break at that line\n");
1110 magic_getarylen(SV *sv, MAGIC *mg)
1113 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1118 magic_setarylen(SV *sv, MAGIC *mg)
1121 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1126 magic_getpos(SV *sv, MAGIC *mg)
1128 SV* lsv = LvTARG(sv);
1130 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1131 mg = mg_find(lsv, 'g');
1132 if (mg && mg->mg_len >= 0) {
1134 sv_setiv(sv, mg->mg_len + PL_curcop->cop_arybase);
1143 magic_setpos(SV *sv, MAGIC *mg)
1145 SV* lsv = LvTARG(sv);
1151 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1152 mg = mg_find(lsv, 'g');
1156 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1157 mg = mg_find(lsv, 'g');
1159 else if (!SvOK(sv)) {
1163 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1165 WITH_THR(pos = SvIV(sv) - PL_curcop->cop_arybase);
1174 mg->mg_flags &= ~MGf_MINMATCH;
1180 magic_getglob(SV *sv, MAGIC *mg)
1182 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1184 gv_efullname3(sv,((GV*)sv), "*");
1188 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1193 magic_setglob(SV *sv, MAGIC *mg)
1200 s = SvPV(sv, PL_na);
1201 if (*s == '*' && s[1])
1203 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1208 GvGP(sv) = gp_ref(GvGP(gv));
1213 magic_getsubstr(SV *sv, MAGIC *mg)
1216 SV *lsv = LvTARG(sv);
1217 char *tmps = SvPV(lsv,len);
1218 I32 offs = LvTARGOFF(sv);
1219 I32 rem = LvTARGLEN(sv);
1223 if (rem + offs > len)
1225 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1230 magic_setsubstr(SV *sv, MAGIC *mg)
1233 char *tmps = SvPV(sv,len);
1234 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1239 magic_gettaint(SV *sv, MAGIC *mg)
1242 TAINT_IF((mg->mg_len & 1) ||
1243 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1248 magic_settaint(SV *sv, MAGIC *mg)
1251 if (PL_localizing) {
1252 if (PL_localizing == 1)
1257 else if (PL_tainted)
1265 magic_getvec(SV *sv, MAGIC *mg)
1267 SV *lsv = LvTARG(sv);
1269 unsigned long retnum;
1279 s = (unsigned char *) SvPV(lsv, lsvlen);
1280 offset = LvTARGOFF(sv);
1281 size = LvTARGLEN(sv);
1282 len = (offset + size + 7) / 8;
1284 /* Copied from pp_vec() */
1292 if (offset >= lsvlen)
1295 retnum = (unsigned long) s[offset] << 8;
1297 else if (size == 32) {
1298 if (offset >= lsvlen)
1300 else if (offset + 1 >= lsvlen)
1301 retnum = (unsigned long) s[offset] << 24;
1302 else if (offset + 2 >= lsvlen)
1303 retnum = ((unsigned long) s[offset] << 24) +
1304 ((unsigned long) s[offset + 1] << 16);
1306 retnum = ((unsigned long) s[offset] << 24) +
1307 ((unsigned long) s[offset + 1] << 16) +
1308 (s[offset + 2] << 8);
1313 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1318 else if (size == 16)
1319 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1320 else if (size == 32)
1321 retnum = ((unsigned long) s[offset] << 24) +
1322 ((unsigned long) s[offset + 1] << 16) +
1323 (s[offset + 2] << 8) + s[offset+3];
1326 sv_setuv(sv, (UV)retnum);
1331 magic_setvec(SV *sv, MAGIC *mg)
1333 do_vecset(sv); /* XXX slurp this routine */
1338 magic_getdefelem(SV *sv, MAGIC *mg)
1341 if (LvTARGLEN(sv)) {
1343 SV *ahv = LvTARG(sv);
1344 if (SvTYPE(ahv) == SVt_PVHV) {
1345 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1350 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1356 AV* av = (AV*)LvTARG(sv);
1357 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1358 targ = AvARRAY(av)[LvTARGOFF(sv)];
1360 if (targ && targ != &PL_sv_undef) {
1361 dTHR; /* just for SvREFCNT_dec */
1362 /* somebody else defined it for us */
1363 SvREFCNT_dec(LvTARG(sv));
1364 LvTARG(sv) = SvREFCNT_inc(targ);
1366 SvREFCNT_dec(mg->mg_obj);
1367 mg->mg_obj = Nullsv;
1368 mg->mg_flags &= ~MGf_REFCOUNTED;
1373 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1378 magic_setdefelem(SV *sv, MAGIC *mg)
1383 sv_setsv(LvTARG(sv), sv);
1384 SvSETMAGIC(LvTARG(sv));
1390 vivify_defelem(SV *sv)
1392 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1396 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1399 SV *ahv = LvTARG(sv);
1400 if (SvTYPE(ahv) == SVt_PVHV) {
1401 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1406 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1410 if (!value || value == &PL_sv_undef)
1411 croak(no_helem, SvPV(mg->mg_obj, PL_na));
1414 AV* av = (AV*)LvTARG(sv);
1415 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1416 LvTARG(sv) = Nullsv; /* array can't be extended */
1418 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1419 if (!svp || (value = *svp) == &PL_sv_undef)
1420 croak(no_aelem, (I32)LvTARGOFF(sv));
1423 (void)SvREFCNT_inc(value);
1424 SvREFCNT_dec(LvTARG(sv));
1427 SvREFCNT_dec(mg->mg_obj);
1428 mg->mg_obj = Nullsv;
1429 mg->mg_flags &= ~MGf_REFCOUNTED;
1433 magic_setmglob(SV *sv, MAGIC *mg)
1441 magic_setbm(SV *sv, MAGIC *mg)
1443 sv_unmagic(sv, 'B');
1449 magic_setfm(SV *sv, MAGIC *mg)
1451 sv_unmagic(sv, 'f');
1457 magic_setuvar(SV *sv, MAGIC *mg)
1459 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1461 if (uf && uf->uf_set)
1462 (*uf->uf_set)(uf->uf_index, sv);
1467 magic_freeregexp(SV *sv, MAGIC *mg)
1469 regexp *re = (regexp *)mg->mg_obj;
1474 #ifdef USE_LOCALE_COLLATE
1476 magic_setcollxfrm(SV *sv, MAGIC *mg)
1479 * René Descartes said "I think not."
1480 * and vanished with a faint plop.
1483 Safefree(mg->mg_ptr);
1489 #endif /* USE_LOCALE_COLLATE */
1492 magic_set(SV *sv, MAGIC *mg)
1498 switch (*mg->mg_ptr) {
1499 case '\001': /* ^A */
1500 sv_setsv(PL_bodytarget, sv);
1502 case '\004': /* ^D */
1503 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1504 DEBUG_x(dump_all());
1506 case '\005': /* ^E */
1508 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1511 SetLastError( SvIV(sv) );
1513 /* will anyone ever use this? */
1514 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1518 case '\006': /* ^F */
1519 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1521 case '\010': /* ^H */
1522 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1526 Safefree(PL_inplace);
1528 PL_inplace = savepv(SvPV(sv,PL_na));
1530 PL_inplace = Nullch;
1532 case '\017': /* ^O */
1534 Safefree(PL_osname);
1536 PL_osname = savepv(SvPV(sv,PL_na));
1540 case '\020': /* ^P */
1541 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1543 case '\024': /* ^T */
1545 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1547 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1550 case '\027': /* ^W */
1551 PL_dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1554 if (PL_localizing) {
1555 if (PL_localizing == 1)
1556 save_sptr((SV**)&PL_last_in_gv);
1558 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1559 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1562 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1563 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1564 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1567 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1568 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1569 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1572 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1575 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1576 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1577 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1580 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1584 IO *io = GvIOp(PL_defoutgv);
1585 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1586 IoFLAGS(io) &= ~IOf_FLUSH;
1588 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1589 PerlIO *ofp = IoOFP(io);
1591 (void)PerlIO_flush(ofp);
1592 IoFLAGS(io) |= IOf_FLUSH;
1598 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1599 PL_multiline = (i != 0);
1602 SvREFCNT_dec(PL_nrs);
1603 PL_nrs = newSVsv(sv);
1604 SvREFCNT_dec(PL_rs);
1605 PL_rs = SvREFCNT_inc(PL_nrs);
1610 if (SvOK(sv) || SvGMAGICAL(sv))
1611 PL_ors = savepv(SvPV(sv,PL_orslen));
1620 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1625 PL_ofmt = savepv(SvPV(sv,PL_na));
1628 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1631 #ifdef COMPLEX_STATUS
1632 if (PL_localizing == 2) {
1633 PL_statusvalue = LvTARGOFF(sv);
1634 PL_statusvalue_vms = LvTARGLEN(sv);
1638 #ifdef VMSISH_STATUS
1640 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1643 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1646 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1647 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1650 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1651 if (PL_delaymagic) {
1652 PL_delaymagic |= DM_RUID;
1653 break; /* don't do magic till later */
1656 (void)setruid((Uid_t)PL_uid);
1659 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1661 #ifdef HAS_SETRESUID
1662 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1664 if (PL_uid == PL_euid) /* special case $< = $> */
1665 (void)PerlProc_setuid(PL_uid);
1667 PL_uid = (I32)PerlProc_getuid();
1668 croak("setruid() not implemented");
1673 PL_uid = (I32)PerlProc_getuid();
1674 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1677 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1678 if (PL_delaymagic) {
1679 PL_delaymagic |= DM_EUID;
1680 break; /* don't do magic till later */
1683 (void)seteuid((Uid_t)PL_euid);
1686 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1688 #ifdef HAS_SETRESUID
1689 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1691 if (PL_euid == PL_uid) /* special case $> = $< */
1692 PerlProc_setuid(PL_euid);
1694 PL_euid = (I32)PerlProc_geteuid();
1695 croak("seteuid() not implemented");
1700 PL_euid = (I32)PerlProc_geteuid();
1701 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1704 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1705 if (PL_delaymagic) {
1706 PL_delaymagic |= DM_RGID;
1707 break; /* don't do magic till later */
1710 (void)setrgid((Gid_t)PL_gid);
1713 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1715 #ifdef HAS_SETRESGID
1716 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1718 if (PL_gid == PL_egid) /* special case $( = $) */
1719 (void)PerlProc_setgid(PL_gid);
1721 PL_gid = (I32)PerlProc_getgid();
1722 croak("setrgid() not implemented");
1727 PL_gid = (I32)PerlProc_getgid();
1728 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1731 #ifdef HAS_SETGROUPS
1733 char *p = SvPV(sv, PL_na);
1734 Groups_t gary[NGROUPS];
1736 SET_NUMERIC_STANDARD();
1739 PL_egid = I_V(atof(p));
1740 for (i = 0; i < NGROUPS; ++i) {
1741 while (*p && !isSPACE(*p))
1747 gary[i] = I_V(atof(p));
1750 (void)setgroups(i, gary);
1752 #else /* HAS_SETGROUPS */
1753 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1754 #endif /* HAS_SETGROUPS */
1755 if (PL_delaymagic) {
1756 PL_delaymagic |= DM_EGID;
1757 break; /* don't do magic till later */
1760 (void)setegid((Gid_t)PL_egid);
1763 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1765 #ifdef HAS_SETRESGID
1766 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1768 if (PL_egid == PL_gid) /* special case $) = $( */
1769 (void)PerlProc_setgid(PL_egid);
1771 PL_egid = (I32)PerlProc_getegid();
1772 croak("setegid() not implemented");
1777 PL_egid = (I32)PerlProc_getegid();
1778 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1781 PL_chopset = SvPV_force(sv,PL_na);
1787 /* See if all the arguments are contiguous in memory */
1788 for (i = 1; i < PL_origargc; i++) {
1789 if (PL_origargv[i] == s + 1
1791 || PL_origargv[i] == s + 2
1794 s += strlen(++s); /* this one is ok too */
1798 /* can grab env area too? */
1799 if (PL_origenviron && (PL_origenviron[0] == s + 1
1801 || (PL_origenviron[0] == s + 9 && (s += 8))
1804 my_setenv("NoNe SuCh", Nullch);
1805 /* force copy of environment */
1806 for (i = 0; PL_origenviron[i]; i++)
1807 if (PL_origenviron[i] == s + 1)
1812 PL_origalen = s - PL_origargv[0];
1814 s = SvPV_force(sv,len);
1816 if (i >= PL_origalen) {
1818 /* don't allow system to limit $0 seen by script */
1819 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1820 Copy(s, PL_origargv[0], i, char);
1821 s = PL_origargv[0]+i;
1825 Copy(s, PL_origargv[0], i, char);
1826 s = PL_origargv[0]+i;
1828 while (++i < PL_origalen)
1830 s = PL_origargv[0]+i;
1831 for (i = 1; i < PL_origargc; i++)
1832 PL_origargv[i] = Nullch;
1837 sv_setsv(thr->errsv, sv);
1839 #endif /* USE_THREADS */
1846 magic_mutexfree(SV *sv, MAGIC *mg)
1849 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1850 (unsigned long)thr, (unsigned long)sv);)
1852 croak("panic: magic_mutexfree");
1853 MUTEX_DESTROY(MgMUTEXP(mg));
1854 COND_DESTROY(MgCONDP(mg));
1858 #endif /* USE_THREADS */
1863 register char **sigv;
1865 for (sigv = sig_name+1; *sigv; sigv++)
1866 if (strEQ(sig,*sigv))
1867 return sig_num[sigv - sig_name];
1869 if (strEQ(sig,"CHLD"))
1873 if (strEQ(sig,"CLD"))
1882 unwind_handler_stack(void *p)
1885 U32 flags = *(U32*)p;
1888 PL_savestack_ix -= 5; /* Unprotect save in progress. */
1889 /* cxstack_ix-- Not needed, die already unwound it. */
1891 SvREFCNT_dec(sig_sv);
1900 SV *sv, *tSv = PL_Sv;
1904 I32 o_save_i = PL_savestack_ix, type;
1907 if (PL_savestack_ix + 15 <= PL_savestack_max)
1909 if (PL_markstack_ptr < PL_markstack_max - 2)
1911 if (PL_retstack_ix < PL_retstack_max - 2)
1913 if (PL_scopestack_ix < PL_scopestack_max - 3)
1917 die("Signal SIG%s received, but no signal handler set.\n",
1920 /* Max number of items pushed there is 3*n or 4. We cannot fix
1921 infinity, so we fix 4 (in fact 5): */
1923 PL_savestack_ix += 5; /* Protect save in progress. */
1924 o_save_i = PL_savestack_ix;
1925 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
1928 PL_markstack_ptr++; /* Protect mark. */
1931 PL_retstack[PL_retstack_ix] = NULL;
1934 PL_scopestack_ix += 1;
1935 /* sv_2cv is too complicated, try a simpler variant first: */
1936 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
1937 || SvTYPE(cv) != SVt_PVCV)
1938 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1940 if (!cv || !CvROOT(cv)) {
1942 warn("SIG%s handler \"%s\" not defined.\n",
1943 sig_name[sig], (gv ? GvENAME(gv)
1950 if(psig_name[sig]) {
1951 sv = SvREFCNT_inc(psig_name[sig]);
1955 sv = sv_newmortal();
1956 sv_setpv(sv,sig_name[sig]);
1959 PUSHSTACKi(PERLSI_SIGNAL);
1964 perl_call_sv((SV*)cv, G_DISCARD);
1969 PL_savestack_ix -= 8; /* Unprotect save in progress. */
1975 PL_scopestack_ix -= 1;
1978 PL_op = myop; /* Apparently not needed... */
1980 PL_Sv = tSv; /* Restore global temporaries. */