3 * Copyright (c) 1991-1999, 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 '\003': /* ^C */
368 sv_setiv(sv, (IV)PL_minus_c);
370 case '\004': /* ^D */
371 sv_setiv(sv, (IV)(PL_debug & 32767));
373 case '\005': /* ^E */
376 # include <descrip.h>
377 # include <starlet.h>
379 $DESCRIPTOR(msgdsc,msg);
380 sv_setnv(sv,(double) vaxc$errno);
381 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
382 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
388 if (!(_emx_env & 0x200)) { /* Under DOS */
389 sv_setnv(sv, (double)errno);
390 sv_setpv(sv, errno ? Strerror(errno) : "");
392 if (errno != errno_isOS2) {
393 int tmp = _syserrno();
394 if (tmp) /* 2nd call to _syserrno() makes it 0 */
397 sv_setnv(sv, (double)Perl_rc);
398 sv_setpv(sv, os2error(Perl_rc));
403 DWORD dwErr = GetLastError();
404 sv_setnv(sv, (double)dwErr);
410 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
411 sv_setpvn(sv, sMsg, dwLen);
412 PerlProc_FreeBuf(sMsg);
414 win32_str_os_error(sv, dwErr);
422 sv_setnv(sv, (double)errno);
423 sv_setpv(sv, errno ? Strerror(errno) : "");
427 SvNOK_on(sv); /* what a wonderful hack! */
429 case '\006': /* ^F */
430 sv_setiv(sv, (IV)PL_maxsysfd);
432 case '\010': /* ^H */
433 sv_setiv(sv, (IV)PL_hints);
435 case '\011': /* ^I */ /* NOT \t in EBCDIC */
437 sv_setpv(sv, PL_inplace);
439 sv_setsv(sv, &PL_sv_undef);
441 case '\017': /* ^O */
442 sv_setpv(sv, PL_osname);
444 case '\020': /* ^P */
445 sv_setiv(sv, (IV)PL_perldb);
447 case '\023': /* ^S */
450 if (PL_lex_state != LEX_NOTPARSING)
458 case '\024': /* ^T */
460 sv_setnv(sv, PL_basetime);
462 sv_setiv(sv, (IV)PL_basetime);
465 case '\027': /* ^W */
466 sv_setiv(sv, (IV)PL_dowarn);
468 case '1': case '2': case '3': case '4':
469 case '5': case '6': case '7': case '8': case '9': case '&':
470 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
472 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
473 * XXX Does the new way break anything?
475 paren = atoi(mg->mg_ptr);
477 if (paren <= rx->nparens &&
478 (s = rx->startp[paren]) &&
479 (t = rx->endp[paren]))
486 was_tainted = PL_tainted;
491 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
496 sv_setsv(sv,&PL_sv_undef);
499 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
500 paren = rx->lastparen;
504 sv_setsv(sv,&PL_sv_undef);
507 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
508 if ((s = rx->subbeg) && rx->startp[0]) {
509 i = rx->startp[0] - s;
513 sv_setsv(sv,&PL_sv_undef);
516 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
517 if (rx->subend && (s = rx->endp[0])) {
522 sv_setsv(sv,&PL_sv_undef);
526 if (GvIO(PL_last_in_gv)) {
527 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
533 sv_setiv(sv, (IV)STATUS_CURRENT);
534 #ifdef COMPLEX_STATUS
535 LvTARGOFF(sv) = PL_statusvalue;
536 LvTARGLEN(sv) = PL_statusvalue_vms;
541 s = IoTOP_NAME(GvIOp(PL_defoutgv));
545 sv_setpv(sv,GvENAME(PL_defoutgv));
550 s = IoFMT_NAME(GvIOp(PL_defoutgv));
552 s = GvENAME(PL_defoutgv);
557 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
560 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
563 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
571 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
574 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
577 sv_setpvn(sv,PL_ofs,PL_ofslen);
580 sv_setpvn(sv,PL_ors,PL_orslen);
583 sv_setpv(sv,PL_ofmt);
587 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
588 sv_setpv(sv, errno ? Strerror(errno) : "");
591 int saveerrno = errno;
592 sv_setnv(sv, (double)errno);
594 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
597 sv_setpv(sv, errno ? Strerror(errno) : "");
601 SvNOK_on(sv); /* what a wonderful hack! */
604 sv_setiv(sv, (IV)PL_uid);
607 sv_setiv(sv, (IV)PL_euid);
610 sv_setiv(sv, (IV)PL_gid);
611 sv_setpvf(sv, "%Vd", (IV)PL_gid);
614 sv_setiv(sv, (IV)PL_egid);
615 sv_setpvf(sv, "%Vd", (IV)PL_egid);
619 Groups_t gary[NGROUPS];
620 i = getgroups(NGROUPS,gary);
622 sv_catpvf(sv, " %Vd", (IV)gary[i]);
625 SvIOK_on(sv); /* what a wonderful hack! */
633 sv_setsv(sv, thr->errsv);
635 #endif /* USE_THREADS */
641 magic_getuvar(SV *sv, MAGIC *mg)
643 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
645 if (uf && uf->uf_val)
646 (*uf->uf_val)(uf->uf_index, sv);
651 magic_setenv(SV *sv, MAGIC *mg)
662 #ifdef DYNAMIC_ENV_FETCH
663 /* We just undefd an environment var. Is a replacement */
664 /* waiting in the wings? */
667 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
668 s = SvPV(*valp, len);
672 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
673 /* And you'll never guess what the dog had */
674 /* in its mouth... */
676 MgTAINTEDDIR_off(mg);
678 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
679 char pathbuf[256], eltbuf[256], *cp, *elt = s;
683 do { /* DCL$PATH may be a search list */
684 while (1) { /* as may dev portion of any element */
685 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
686 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
687 cando_by_name(S_IWUSR,0,elt) ) {
692 if ((cp = strchr(elt, ':')) != Nullch)
694 if (my_trnlnm(elt, eltbuf, j++))
700 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
703 if (s && klen == 4 && strEQ(ptr,"PATH")) {
704 char *strend = s + len;
709 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
712 if (i >= sizeof tmpbuf /* too long -- assume the worst */
714 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
721 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
727 magic_clearenv(SV *sv, MAGIC *mg)
730 my_setenv(MgPV(mg,n_a),Nullch);
735 magic_set_all_env(SV *sv, MAGIC *mg)
738 die("Can't make list assignment to %%ENV on this system");
744 magic_clear_all_env(sv,mg);
745 hv_iterinit((HV*)sv);
746 while (entry = hv_iternext((HV*)sv)) {
748 my_setenv(hv_iterkey(entry, &keylen),
749 SvPV(hv_iterval((HV*)sv, entry), n_a));
757 magic_clear_all_env(SV *sv, MAGIC *mg)
760 die("Can't make list assignment to %%ENV on this system");
763 char *envv = GetEnvironmentStrings();
767 char *end = strchr(cur,'=');
768 if (end && end != cur) {
770 my_setenv(cur,Nullch);
772 cur = end + strlen(end+1)+2;
774 else if ((len = strlen(cur)))
777 FreeEnvironmentStrings(envv);
781 if (environ == PL_origenviron)
782 New(901, environ, 1, char*);
784 for (i = 0; environ[i]; i++)
785 Safefree(environ[i]);
794 magic_getsig(SV *sv, MAGIC *mg)
798 /* Are we fetching a signal entry? */
799 i = whichsig(MgPV(mg,n_a));
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,&PL_sv_undef);
811 psig_ptr[i] = SvREFCNT_inc(sv);
818 magic_clearsig(SV *sv, MAGIC *mg)
822 /* Are we clearing a signal entry? */
823 i = whichsig(MgPV(mg,n_a));
826 SvREFCNT_dec(psig_ptr[i]);
830 SvREFCNT_dec(psig_name[i]);
838 magic_setsig(SV *sv, MAGIC *mg)
848 if (strEQ(s,"__DIE__"))
850 else if (strEQ(s,"__WARN__"))
852 else if (strEQ(s,"__PARSE__"))
855 croak("No such hook: %s", s);
863 i = whichsig(s); /* ...no, a brick */
865 if (PL_dowarn || strEQ(s,"ALARM"))
866 warn("No such signal: SIG%s", s);
869 SvREFCNT_dec(psig_name[i]);
870 SvREFCNT_dec(psig_ptr[i]);
871 psig_ptr[i] = SvREFCNT_inc(sv);
872 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
873 psig_name[i] = newSVpv(s, strlen(s));
874 SvREADONLY_on(psig_name[i]);
876 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
878 (void)rsignal(i, PL_sighandlerp);
880 *svp = SvREFCNT_inc(sv);
883 s = SvPV_force(sv,n_a);
884 if (strEQ(s,"IGNORE")) {
886 (void)rsignal(i, SIG_IGN);
890 else if (strEQ(s,"DEFAULT") || !*s) {
892 (void)rsignal(i, SIG_DFL);
898 * We should warn if HINT_STRICT_REFS, but without
899 * access to a known hint bit in a known OP, we can't
900 * tell whether HINT_STRICT_REFS is in force or not.
902 if (!strchr(s,':') && !strchr(s,'\''))
903 sv_setpv(sv, form("main::%s", s));
905 (void)rsignal(i, PL_sighandlerp);
907 *svp = SvREFCNT_inc(sv);
913 magic_setisa(SV *sv, MAGIC *mg)
922 magic_setamagic(SV *sv, MAGIC *mg)
924 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
925 PL_amagic_generation++;
929 #endif /* OVERLOAD */
932 magic_getnkeys(SV *sv, MAGIC *mg)
934 HV *hv = (HV*)LvTARG(sv);
939 (void) hv_iterinit(hv);
940 if (! SvTIED_mg((SV*)hv, 'P'))
944 while (entry = hv_iternext(hv)) {
955 magic_setnkeys(SV *sv, MAGIC *mg)
958 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
963 /* caller is responsible for stack switching/cleanup */
965 magic_methcall(SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
971 PUSHs(SvTIED_obj(sv, mg));
975 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
976 else if (mg->mg_len == HEf_SVKEY)
977 PUSHs((SV*)mg->mg_ptr);
979 else if (mg->mg_type == 'p') {
980 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
988 return perl_call_method(meth, flags);
992 magic_methpack(SV *sv, MAGIC *mg, char *meth)
998 PUSHSTACKi(PERLSI_MAGIC);
1000 if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
1001 sv_setsv(sv, *PL_stack_sp--);
1011 magic_getpack(SV *sv, MAGIC *mg)
1013 magic_methpack(sv,mg,"FETCH");
1015 mg->mg_flags |= MGf_GSKIP;
1020 magic_setpack(SV *sv, MAGIC *mg)
1024 PUSHSTACKi(PERLSI_MAGIC);
1025 magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1032 magic_clearpack(SV *sv, MAGIC *mg)
1034 return magic_methpack(sv,mg,"DELETE");
1039 magic_sizepack(SV *sv, MAGIC *mg)
1046 PUSHSTACKi(PERLSI_MAGIC);
1047 if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1048 sv = *PL_stack_sp--;
1049 retval = (U32) SvIV(sv)-1;
1057 int magic_wipepack(SV *sv, MAGIC *mg)
1062 PUSHSTACKi(PERLSI_MAGIC);
1064 XPUSHs(SvTIED_obj(sv, mg));
1066 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1073 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1076 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1080 PUSHSTACKi(PERLSI_MAGIC);
1083 PUSHs(SvTIED_obj(sv, mg));
1088 if (perl_call_method(meth, G_SCALAR))
1089 sv_setsv(key, *PL_stack_sp--);
1098 magic_existspack(SV *sv, MAGIC *mg)
1100 return magic_methpack(sv,mg,"EXISTS");
1104 magic_setdbline(SV *sv, MAGIC *mg)
1115 svp = av_fetch(GvAV(gv),
1116 atoi(MgPV(mg,n_a)), FALSE);
1117 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1120 warn("Can't break at that line\n");
1125 magic_getarylen(SV *sv, MAGIC *mg)
1128 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1133 magic_setarylen(SV *sv, MAGIC *mg)
1136 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1141 magic_getpos(SV *sv, MAGIC *mg)
1143 SV* lsv = LvTARG(sv);
1145 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1146 mg = mg_find(lsv, 'g');
1147 if (mg && mg->mg_len >= 0) {
1149 sv_setiv(sv, mg->mg_len + PL_curcop->cop_arybase);
1158 magic_setpos(SV *sv, MAGIC *mg)
1160 SV* lsv = LvTARG(sv);
1166 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1167 mg = mg_find(lsv, 'g');
1171 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1172 mg = mg_find(lsv, 'g');
1174 else if (!SvOK(sv)) {
1178 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1180 WITH_THR(pos = SvIV(sv) - PL_curcop->cop_arybase);
1189 mg->mg_flags &= ~MGf_MINMATCH;
1195 magic_getglob(SV *sv, MAGIC *mg)
1197 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1199 gv_efullname3(sv,((GV*)sv), "*");
1203 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1208 magic_setglob(SV *sv, MAGIC *mg)
1217 if (*s == '*' && s[1])
1219 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1224 GvGP(sv) = gp_ref(GvGP(gv));
1229 magic_getsubstr(SV *sv, MAGIC *mg)
1232 SV *lsv = LvTARG(sv);
1233 char *tmps = SvPV(lsv,len);
1234 I32 offs = LvTARGOFF(sv);
1235 I32 rem = LvTARGLEN(sv);
1239 if (rem + offs > len)
1241 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1246 magic_setsubstr(SV *sv, MAGIC *mg)
1249 char *tmps = SvPV(sv,len);
1250 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1255 magic_gettaint(SV *sv, MAGIC *mg)
1258 TAINT_IF((mg->mg_len & 1) ||
1259 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1264 magic_settaint(SV *sv, MAGIC *mg)
1267 if (PL_localizing) {
1268 if (PL_localizing == 1)
1273 else if (PL_tainted)
1281 magic_getvec(SV *sv, MAGIC *mg)
1283 SV *lsv = LvTARG(sv);
1285 unsigned long retnum;
1295 s = (unsigned char *) SvPV(lsv, lsvlen);
1296 offset = LvTARGOFF(sv);
1297 size = LvTARGLEN(sv);
1298 len = (offset + size + 7) / 8;
1300 /* Copied from pp_vec() */
1308 if (offset >= lsvlen)
1311 retnum = (unsigned long) s[offset] << 8;
1313 else if (size == 32) {
1314 if (offset >= lsvlen)
1316 else if (offset + 1 >= lsvlen)
1317 retnum = (unsigned long) s[offset] << 24;
1318 else if (offset + 2 >= lsvlen)
1319 retnum = ((unsigned long) s[offset] << 24) +
1320 ((unsigned long) s[offset + 1] << 16);
1322 retnum = ((unsigned long) s[offset] << 24) +
1323 ((unsigned long) s[offset + 1] << 16) +
1324 (s[offset + 2] << 8);
1329 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1334 else if (size == 16)
1335 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1336 else if (size == 32)
1337 retnum = ((unsigned long) s[offset] << 24) +
1338 ((unsigned long) s[offset + 1] << 16) +
1339 (s[offset + 2] << 8) + s[offset+3];
1342 sv_setuv(sv, (UV)retnum);
1347 magic_setvec(SV *sv, MAGIC *mg)
1349 do_vecset(sv); /* XXX slurp this routine */
1354 magic_getdefelem(SV *sv, MAGIC *mg)
1357 if (LvTARGLEN(sv)) {
1359 SV *ahv = LvTARG(sv);
1360 if (SvTYPE(ahv) == SVt_PVHV) {
1361 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1366 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1372 AV* av = (AV*)LvTARG(sv);
1373 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1374 targ = AvARRAY(av)[LvTARGOFF(sv)];
1376 if (targ && targ != &PL_sv_undef) {
1377 dTHR; /* just for SvREFCNT_dec */
1378 /* somebody else defined it for us */
1379 SvREFCNT_dec(LvTARG(sv));
1380 LvTARG(sv) = SvREFCNT_inc(targ);
1382 SvREFCNT_dec(mg->mg_obj);
1383 mg->mg_obj = Nullsv;
1384 mg->mg_flags &= ~MGf_REFCOUNTED;
1389 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1394 magic_setdefelem(SV *sv, MAGIC *mg)
1399 sv_setsv(LvTARG(sv), sv);
1400 SvSETMAGIC(LvTARG(sv));
1406 vivify_defelem(SV *sv)
1408 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1412 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1415 SV *ahv = LvTARG(sv);
1416 if (SvTYPE(ahv) == SVt_PVHV) {
1417 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1422 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1426 if (!value || value == &PL_sv_undef) {
1428 croak(no_helem, SvPV(mg->mg_obj, n_a));
1432 AV* av = (AV*)LvTARG(sv);
1433 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1434 LvTARG(sv) = Nullsv; /* array can't be extended */
1436 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1437 if (!svp || (value = *svp) == &PL_sv_undef)
1438 croak(no_aelem, (I32)LvTARGOFF(sv));
1441 (void)SvREFCNT_inc(value);
1442 SvREFCNT_dec(LvTARG(sv));
1445 SvREFCNT_dec(mg->mg_obj);
1446 mg->mg_obj = Nullsv;
1447 mg->mg_flags &= ~MGf_REFCOUNTED;
1451 magic_setmglob(SV *sv, MAGIC *mg)
1459 magic_setbm(SV *sv, MAGIC *mg)
1461 sv_unmagic(sv, 'B');
1467 magic_setfm(SV *sv, MAGIC *mg)
1469 sv_unmagic(sv, 'f');
1475 magic_setuvar(SV *sv, MAGIC *mg)
1477 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1479 if (uf && uf->uf_set)
1480 (*uf->uf_set)(uf->uf_index, sv);
1485 magic_freeregexp(SV *sv, MAGIC *mg)
1487 regexp *re = (regexp *)mg->mg_obj;
1492 #ifdef USE_LOCALE_COLLATE
1494 magic_setcollxfrm(SV *sv, MAGIC *mg)
1497 * René Descartes said "I think not."
1498 * and vanished with a faint plop.
1501 Safefree(mg->mg_ptr);
1507 #endif /* USE_LOCALE_COLLATE */
1510 magic_set(SV *sv, MAGIC *mg)
1516 switch (*mg->mg_ptr) {
1517 case '\001': /* ^A */
1518 sv_setsv(PL_bodytarget, sv);
1520 case '\003': /* ^C */
1521 PL_minus_c = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1523 case '\004': /* ^D */
1524 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1525 DEBUG_x(dump_all());
1527 case '\005': /* ^E */
1529 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1532 SetLastError( SvIV(sv) );
1534 /* will anyone ever use this? */
1535 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1539 case '\006': /* ^F */
1540 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1542 case '\010': /* ^H */
1543 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1545 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1547 Safefree(PL_inplace);
1549 PL_inplace = savepv(SvPV(sv,len));
1551 PL_inplace = Nullch;
1553 case '\017': /* ^O */
1555 Safefree(PL_osname);
1557 PL_osname = savepv(SvPV(sv,len));
1561 case '\020': /* ^P */
1562 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1564 case '\024': /* ^T */
1566 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1568 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1571 case '\027': /* ^W */
1572 PL_dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1575 if (PL_localizing) {
1576 if (PL_localizing == 1)
1577 save_sptr((SV**)&PL_last_in_gv);
1579 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1580 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1583 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1584 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1585 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1588 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1589 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
1590 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1593 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1596 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1597 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1598 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1601 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1605 IO *io = GvIOp(PL_defoutgv);
1606 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1607 IoFLAGS(io) &= ~IOf_FLUSH;
1609 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1610 PerlIO *ofp = IoOFP(io);
1612 (void)PerlIO_flush(ofp);
1613 IoFLAGS(io) |= IOf_FLUSH;
1619 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1620 PL_multiline = (i != 0);
1623 SvREFCNT_dec(PL_nrs);
1624 PL_nrs = newSVsv(sv);
1625 SvREFCNT_dec(PL_rs);
1626 PL_rs = SvREFCNT_inc(PL_nrs);
1631 if (SvOK(sv) || SvGMAGICAL(sv))
1632 PL_ors = savepv(SvPV(sv,PL_orslen));
1641 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1646 PL_ofmt = savepv(SvPV(sv,len));
1649 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1652 #ifdef COMPLEX_STATUS
1653 if (PL_localizing == 2) {
1654 PL_statusvalue = LvTARGOFF(sv);
1655 PL_statusvalue_vms = LvTARGLEN(sv);
1659 #ifdef VMSISH_STATUS
1661 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1664 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1667 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1668 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1671 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1672 if (PL_delaymagic) {
1673 PL_delaymagic |= DM_RUID;
1674 break; /* don't do magic till later */
1677 (void)setruid((Uid_t)PL_uid);
1680 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1682 #ifdef HAS_SETRESUID
1683 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1685 if (PL_uid == PL_euid) /* special case $< = $> */
1686 (void)PerlProc_setuid(PL_uid);
1688 PL_uid = (I32)PerlProc_getuid();
1689 croak("setruid() not implemented");
1694 PL_uid = (I32)PerlProc_getuid();
1695 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1698 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1699 if (PL_delaymagic) {
1700 PL_delaymagic |= DM_EUID;
1701 break; /* don't do magic till later */
1704 (void)seteuid((Uid_t)PL_euid);
1707 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1709 #ifdef HAS_SETRESUID
1710 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1712 if (PL_euid == PL_uid) /* special case $> = $< */
1713 PerlProc_setuid(PL_euid);
1715 PL_euid = (I32)PerlProc_geteuid();
1716 croak("seteuid() not implemented");
1721 PL_euid = (I32)PerlProc_geteuid();
1722 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1725 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1726 if (PL_delaymagic) {
1727 PL_delaymagic |= DM_RGID;
1728 break; /* don't do magic till later */
1731 (void)setrgid((Gid_t)PL_gid);
1734 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1736 #ifdef HAS_SETRESGID
1737 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1739 if (PL_gid == PL_egid) /* special case $( = $) */
1740 (void)PerlProc_setgid(PL_gid);
1742 PL_gid = (I32)PerlProc_getgid();
1743 croak("setrgid() not implemented");
1748 PL_gid = (I32)PerlProc_getgid();
1749 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1752 #ifdef HAS_SETGROUPS
1754 char *p = SvPV(sv, len);
1755 Groups_t gary[NGROUPS];
1757 SET_NUMERIC_STANDARD();
1760 PL_egid = I_V(atof(p));
1761 for (i = 0; i < NGROUPS; ++i) {
1762 while (*p && !isSPACE(*p))
1768 gary[i] = I_V(atof(p));
1771 (void)setgroups(i, gary);
1773 #else /* HAS_SETGROUPS */
1774 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1775 #endif /* HAS_SETGROUPS */
1776 if (PL_delaymagic) {
1777 PL_delaymagic |= DM_EGID;
1778 break; /* don't do magic till later */
1781 (void)setegid((Gid_t)PL_egid);
1784 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1786 #ifdef HAS_SETRESGID
1787 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1789 if (PL_egid == PL_gid) /* special case $) = $( */
1790 (void)PerlProc_setgid(PL_egid);
1792 PL_egid = (I32)PerlProc_getegid();
1793 croak("setegid() not implemented");
1798 PL_egid = (I32)PerlProc_getegid();
1799 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1802 PL_chopset = SvPV_force(sv,len);
1805 #ifdef HAS_SETPROCTITLE
1806 /* The BSDs don't show the argv[] in ps(1) output, they
1807 * show a string from the process struct and provide
1808 * the setproctitle() routine to manipulate that. */
1811 # if __FreeBSD_version >= 410001
1812 /* The leading "-" removes the "perl: " prefix,
1813 * but not the "(perl) suffix from the ps(1)
1814 * output, because that's what ps(1) shows if the
1815 * argv[] is modified. */
1816 setproctitle("-%s", s, len + 1);
1817 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
1818 /* This doesn't really work if you assume that
1819 * $0 = 'foobar'; will wipe out 'perl' from the $0
1820 * because in ps(1) output the result will be like
1821 * sprintf("perl: %s (perl)", s)
1822 * I guess this is a security feature:
1823 * one (a user process) cannot get rid of the original name.
1825 setproctitle("%s", s);
1832 /* See if all the arguments are contiguous in memory */
1833 for (i = 1; i < PL_origargc; i++) {
1834 if (PL_origargv[i] == s + 1
1836 || PL_origargv[i] == s + 2
1841 s += strlen(s); /* this one is ok too */
1846 /* can grab env area too? */
1847 if (PL_origenviron && (PL_origenviron[0] == s + 1
1849 || (PL_origenviron[0] == s + 9 && (s += 8))
1852 my_setenv("NoNe SuCh", Nullch);
1853 /* force copy of environment */
1854 for (i = 0; PL_origenviron[i]; i++)
1855 if (PL_origenviron[i] == s + 1) {
1862 PL_origalen = s - PL_origargv[0];
1864 s = SvPV_force(sv,len);
1866 if (i >= PL_origalen) {
1868 /* don't allow system to limit $0 seen by script */
1869 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1870 Copy(s, PL_origargv[0], i, char);
1871 s = PL_origargv[0]+i;
1875 Copy(s, PL_origargv[0], i, char);
1876 s = PL_origargv[0]+i;
1878 while (++i < PL_origalen)
1880 s = PL_origargv[0]+i;
1881 for (i = 1; i < PL_origargc; i++)
1882 PL_origargv[i] = Nullch;
1887 sv_setsv(thr->errsv, sv);
1889 #endif /* USE_THREADS */
1896 magic_mutexfree(SV *sv, MAGIC *mg)
1899 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1900 (unsigned long)thr, (unsigned long)sv);)
1902 croak("panic: magic_mutexfree");
1903 MUTEX_DESTROY(MgMUTEXP(mg));
1904 COND_DESTROY(MgCONDP(mg));
1907 #endif /* USE_THREADS */
1912 register char **sigv;
1914 for (sigv = sig_name+1; *sigv; sigv++)
1915 if (strEQ(sig,*sigv))
1916 return sig_num[sigv - sig_name];
1918 if (strEQ(sig,"CHLD"))
1922 if (strEQ(sig,"CLD"))
1931 unwind_handler_stack(void *p)
1934 U32 flags = *(U32*)p;
1937 PL_savestack_ix -= 5; /* Unprotect save in progress. */
1938 /* cxstack_ix-- Not needed, die already unwound it. */
1940 SvREFCNT_dec(sig_sv);
1949 SV *sv, *tSv = PL_Sv;
1953 I32 o_save_i = PL_savestack_ix, type;
1956 if (PL_savestack_ix + 15 <= PL_savestack_max)
1958 if (PL_markstack_ptr < PL_markstack_max - 2)
1960 if (PL_retstack_ix < PL_retstack_max - 2)
1962 if (PL_scopestack_ix < PL_scopestack_max - 3)
1966 die("Signal SIG%s received, but no signal handler set.\n",
1969 /* Max number of items pushed there is 3*n or 4. We cannot fix
1970 infinity, so we fix 4 (in fact 5): */
1972 PL_savestack_ix += 5; /* Protect save in progress. */
1973 o_save_i = PL_savestack_ix;
1974 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
1977 PL_markstack_ptr++; /* Protect mark. */
1980 PL_retstack[PL_retstack_ix] = NULL;
1983 PL_scopestack_ix += 1;
1984 /* sv_2cv is too complicated, try a simpler variant first: */
1985 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
1986 || SvTYPE(cv) != SVt_PVCV)
1987 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
1989 if (!cv || !CvROOT(cv)) {
1991 warn("SIG%s handler \"%s\" not defined.\n",
1992 sig_name[sig], (gv ? GvENAME(gv)
1999 if(psig_name[sig]) {
2000 sv = SvREFCNT_inc(psig_name[sig]);
2004 sv = sv_newmortal();
2005 sv_setpv(sv,sig_name[sig]);
2008 PUSHSTACKi(PERLSI_SIGNAL);
2013 perl_call_sv((SV*)cv, G_DISCARD);
2018 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2024 PL_scopestack_ix -= 1;
2027 PL_op = myop; /* Apparently not needed... */
2029 PL_Sv = tSv; /* Restore global temporaries. */