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))
359 static char buffer[50] ;
364 sprintf(buffer, "Buffer %d, Length = %d - ", sv, SvCUR(sv)) ;
366 for (i = 0; i < SvCUR(sv) ; ++ i) {
367 sprintf (buf1, " %x [%x]", (p+i), *(p+i)) ;
368 strcat(buffer, buf1) ;
378 magic_get(SV *sv, MAGIC *mg)
387 switch (*mg->mg_ptr) {
388 case '\001': /* ^A */
389 sv_setsv(sv, PL_bodytarget);
391 case '\002': /* ^B */
392 /* printf("magic_get $^B: ") ; */
393 if (curcop->cop_warnings == WARN_NONE)
394 /* printf("WARN_NONE\n"), */
395 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
396 else if (curcop->cop_warnings == WARN_ALL)
397 /* printf("WARN_ALL\n"), */
398 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
400 /* printf("some %s\n", printW(curcop->cop_warnings)), */
401 sv_setsv(sv, curcop->cop_warnings);
403 case '\004': /* ^D */
404 sv_setiv(sv, (IV)(PL_debug & 32767));
406 case '\005': /* ^E */
409 # include <descrip.h>
410 # include <starlet.h>
412 $DESCRIPTOR(msgdsc,msg);
413 sv_setnv(sv,(double) vaxc$errno);
414 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
415 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
421 if (!(_emx_env & 0x200)) { /* Under DOS */
422 sv_setnv(sv, (double)errno);
423 sv_setpv(sv, errno ? Strerror(errno) : "");
425 if (errno != errno_isOS2)
426 Perl_rc = _syserrno();
427 sv_setnv(sv, (double)Perl_rc);
428 sv_setpv(sv, os2error(Perl_rc));
433 DWORD dwErr = GetLastError();
434 sv_setnv(sv, (double)dwErr);
440 PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
441 sv_setpvn(sv, sMsg, dwLen);
442 PerlProc_FreeBuf(sMsg);
444 win32_str_os_error(sv, dwErr);
452 sv_setnv(sv, (double)errno);
453 sv_setpv(sv, errno ? Strerror(errno) : "");
457 SvNOK_on(sv); /* what a wonderful hack! */
459 case '\006': /* ^F */
460 sv_setiv(sv, (IV)PL_maxsysfd);
462 case '\010': /* ^H */
463 sv_setiv(sv, (IV)PL_hints);
465 case '\011': /* ^I */ /* NOT \t in EBCDIC */
467 sv_setpv(sv, PL_inplace);
469 sv_setsv(sv, &PL_sv_undef);
471 case '\017': /* ^O */
472 sv_setpv(sv, PL_osname);
474 case '\020': /* ^P */
475 sv_setiv(sv, (IV)PL_perldb);
477 case '\023': /* ^S */
480 if (PL_lex_state != LEX_NOTPARSING)
488 case '\024': /* ^T */
490 sv_setnv(sv, PL_basetime);
492 sv_setiv(sv, (IV)PL_basetime);
495 case '\027': /* ^W */
496 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) == G_WARN_ON));
498 case '1': case '2': case '3': case '4':
499 case '5': case '6': case '7': case '8': case '9': case '&':
500 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
502 * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
503 * XXX Does the new way break anything?
505 paren = atoi(mg->mg_ptr);
507 if (paren <= rx->nparens &&
508 (s = rx->startp[paren]) &&
509 (t = rx->endp[paren]))
516 was_tainted = PL_tainted;
521 PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
526 sv_setsv(sv,&PL_sv_undef);
529 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
530 paren = rx->lastparen;
534 sv_setsv(sv,&PL_sv_undef);
537 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
538 if ((s = rx->subbeg) && rx->startp[0]) {
539 i = rx->startp[0] - s;
543 sv_setsv(sv,&PL_sv_undef);
546 if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
547 if (rx->subend && (s = rx->endp[0])) {
552 sv_setsv(sv,&PL_sv_undef);
556 if (GvIO(PL_last_in_gv)) {
557 sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
563 sv_setiv(sv, (IV)STATUS_CURRENT);
564 #ifdef COMPLEX_STATUS
565 LvTARGOFF(sv) = PL_statusvalue;
566 LvTARGLEN(sv) = PL_statusvalue_vms;
571 s = IoTOP_NAME(GvIOp(PL_defoutgv));
575 sv_setpv(sv,GvENAME(PL_defoutgv));
580 s = IoFMT_NAME(GvIOp(PL_defoutgv));
582 s = GvENAME(PL_defoutgv);
587 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
590 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
593 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
601 WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
604 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
607 sv_setpvn(sv,PL_ofs,PL_ofslen);
610 sv_setpvn(sv,PL_ors,PL_orslen);
613 sv_setpv(sv,PL_ofmt);
617 sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
618 sv_setpv(sv, errno ? Strerror(errno) : "");
621 int saveerrno = errno;
622 sv_setnv(sv, (double)errno);
624 if (errno == errno_isOS2) sv_setpv(sv, os2error(Perl_rc));
627 sv_setpv(sv, errno ? Strerror(errno) : "");
631 SvNOK_on(sv); /* what a wonderful hack! */
634 sv_setiv(sv, (IV)PL_uid);
637 sv_setiv(sv, (IV)PL_euid);
640 sv_setiv(sv, (IV)PL_gid);
641 sv_setpvf(sv, "%Vd", (IV)PL_gid);
644 sv_setiv(sv, (IV)PL_egid);
645 sv_setpvf(sv, "%Vd", (IV)PL_egid);
649 Groups_t gary[NGROUPS];
650 i = getgroups(NGROUPS,gary);
652 sv_catpvf(sv, " %Vd", (IV)gary[i]);
655 SvIOK_on(sv); /* what a wonderful hack! */
663 sv_setsv(sv, thr->errsv);
665 #endif /* USE_THREADS */
671 magic_getuvar(SV *sv, MAGIC *mg)
673 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
675 if (uf && uf->uf_val)
676 (*uf->uf_val)(uf->uf_index, sv);
681 magic_setenv(SV *sv, MAGIC *mg)
692 #ifdef DYNAMIC_ENV_FETCH
693 /* We just undefd an environment var. Is a replacement */
694 /* waiting in the wings? */
697 if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
698 s = SvPV(*valp, len);
702 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
703 /* And you'll never guess what the dog had */
704 /* in its mouth... */
706 MgTAINTEDDIR_off(mg);
708 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
709 char pathbuf[256], eltbuf[256], *cp, *elt = s;
713 do { /* DCL$PATH may be a search list */
714 while (1) { /* as may dev portion of any element */
715 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
716 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
717 cando_by_name(S_IWUSR,0,elt) ) {
722 if ((cp = strchr(elt, ':')) != Nullch)
724 if (my_trnlnm(elt, eltbuf, j++))
730 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
733 if (s && klen == 4 && strEQ(ptr,"PATH")) {
734 char *strend = s + len;
739 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
742 if (i >= sizeof tmpbuf /* too long -- assume the worst */
744 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
751 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
757 magic_clearenv(SV *sv, MAGIC *mg)
759 my_setenv(MgPV(mg,PL_na),Nullch);
764 magic_set_all_env(SV *sv, MAGIC *mg)
767 die("Can't make list assignment to %%ENV on this system");
772 magic_clear_all_env(sv,mg);
773 hv_iterinit((HV*)sv);
774 while (entry = hv_iternext((HV*)sv)) {
776 my_setenv(hv_iterkey(entry, &keylen),
777 SvPV(hv_iterval((HV*)sv, entry), PL_na));
785 magic_clear_all_env(SV *sv, MAGIC *mg)
788 die("Can't make list assignment to %%ENV on this system");
791 char *envv = GetEnvironmentStrings();
795 char *end = strchr(cur,'=');
796 if (end && end != cur) {
798 my_setenv(cur,Nullch);
800 cur += strlen(end+1)+1;
802 else if ((len = strlen(cur)))
805 FreeEnvironmentStrings(envv);
809 if (environ == PL_origenviron)
810 New(901, environ, 1, char*);
812 for (i = 0; environ[i]; i++)
813 Safefree(environ[i]);
822 magic_getsig(SV *sv, MAGIC *mg)
825 /* Are we fetching a signal entry? */
826 i = whichsig(MgPV(mg,PL_na));
829 sv_setsv(sv,psig_ptr[i]);
831 Sighandler_t sigstate = rsignal_state(i);
833 /* cache state so we don't fetch it again */
834 if(sigstate == SIG_IGN)
835 sv_setpv(sv,"IGNORE");
837 sv_setsv(sv,&PL_sv_undef);
838 psig_ptr[i] = SvREFCNT_inc(sv);
845 magic_clearsig(SV *sv, MAGIC *mg)
848 /* Are we clearing a signal entry? */
849 i = whichsig(MgPV(mg,PL_na));
852 SvREFCNT_dec(psig_ptr[i]);
856 SvREFCNT_dec(psig_name[i]);
864 magic_setsig(SV *sv, MAGIC *mg)
873 if (strEQ(s,"__DIE__"))
875 else if (strEQ(s,"__WARN__"))
877 else if (strEQ(s,"__PARSE__"))
880 croak("No such hook: %s", s);
888 i = whichsig(s); /* ...no, a brick */
890 if (ckWARN(WARN_SIGNAL) || strEQ(s,"ALARM"))
891 warner(WARN_SIGNAL, "No such signal: SIG%s", s);
894 SvREFCNT_dec(psig_name[i]);
895 SvREFCNT_dec(psig_ptr[i]);
896 psig_ptr[i] = SvREFCNT_inc(sv);
897 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
898 psig_name[i] = newSVpv(s, strlen(s));
899 SvREADONLY_on(psig_name[i]);
901 if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
903 (void)rsignal(i, PL_sighandlerp);
905 *svp = SvREFCNT_inc(sv);
908 s = SvPV_force(sv,PL_na);
909 if (strEQ(s,"IGNORE")) {
911 (void)rsignal(i, SIG_IGN);
915 else if (strEQ(s,"DEFAULT") || !*s) {
917 (void)rsignal(i, SIG_DFL);
923 * We should warn if HINT_STRICT_REFS, but without
924 * access to a known hint bit in a known OP, we can't
925 * tell whether HINT_STRICT_REFS is in force or not.
927 if (!strchr(s,':') && !strchr(s,'\''))
928 sv_setpv(sv, form("main::%s", s));
930 (void)rsignal(i, PL_sighandlerp);
932 *svp = SvREFCNT_inc(sv);
938 magic_setisa(SV *sv, MAGIC *mg)
947 magic_setamagic(SV *sv, MAGIC *mg)
949 /* HV_badAMAGIC_on(Sv_STASH(sv)); */
950 PL_amagic_generation++;
954 #endif /* OVERLOAD */
957 magic_getnkeys(SV *sv, MAGIC *mg)
959 HV *hv = (HV*)LvTARG(sv);
964 (void) hv_iterinit(hv);
965 if (!SvRMAGICAL(hv) || !mg_find((SV*)hv,'P'))
969 while (entry = hv_iternext(hv)) {
980 magic_setnkeys(SV *sv, MAGIC *mg)
983 hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
988 /* caller is responsible for stack switching/cleanup */
990 magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
1000 PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
1001 else if (mg->mg_len == HEf_SVKEY)
1002 PUSHs((SV*)mg->mg_ptr);
1004 else if (mg->mg_type == 'p') {
1005 PUSHs(sv_2mortal(newSViv(mg->mg_len)));
1013 return perl_call_method(meth, flags);
1017 magic_methpack(SV *sv, MAGIC *mg, char *meth)
1023 PUSHSTACKi(PERLSI_MAGIC);
1025 if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
1026 sv_setsv(sv, *PL_stack_sp--);
1036 magic_getpack(SV *sv, MAGIC *mg)
1038 magic_methpack(sv,mg,"FETCH");
1040 mg->mg_flags |= MGf_GSKIP;
1045 magic_setpack(SV *sv, MAGIC *mg)
1049 PUSHSTACKi(PERLSI_MAGIC);
1050 magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
1057 magic_clearpack(SV *sv, MAGIC *mg)
1059 return magic_methpack(sv,mg,"DELETE");
1064 magic_sizepack(SV *sv, MAGIC *mg)
1071 PUSHSTACKi(PERLSI_MAGIC);
1072 if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
1073 sv = *PL_stack_sp--;
1074 retval = (U32) SvIV(sv)-1;
1082 int magic_wipepack(SV *sv, MAGIC *mg)
1087 PUSHSTACKi(PERLSI_MAGIC);
1091 perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
1098 magic_nextpack(SV *sv, MAGIC *mg, SV *key)
1101 char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
1105 PUSHSTACKi(PERLSI_MAGIC);
1113 if (perl_call_method(meth, G_SCALAR))
1114 sv_setsv(key, *PL_stack_sp--);
1123 magic_existspack(SV *sv, MAGIC *mg)
1125 return magic_methpack(sv,mg,"EXISTS");
1129 magic_setdbline(SV *sv, MAGIC *mg)
1139 svp = av_fetch(GvAV(gv),
1140 atoi(MgPV(mg,PL_na)), FALSE);
1141 if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
1144 warn("Can't break at that line\n");
1149 magic_getarylen(SV *sv, MAGIC *mg)
1152 sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
1157 magic_setarylen(SV *sv, MAGIC *mg)
1160 av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
1165 magic_getpos(SV *sv, MAGIC *mg)
1167 SV* lsv = LvTARG(sv);
1169 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
1170 mg = mg_find(lsv, 'g');
1171 if (mg && mg->mg_len >= 0) {
1175 sv_pos_b2u(lsv, &i);
1176 sv_setiv(sv, i + PL_curcop->cop_arybase);
1185 magic_setpos(SV *sv, MAGIC *mg)
1187 SV* lsv = LvTARG(sv);
1195 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
1196 mg = mg_find(lsv, 'g');
1200 sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
1201 mg = mg_find(lsv, 'g');
1203 else if (!SvOK(sv)) {
1207 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
1209 pos = SvIV(sv) - PL_curcop->cop_arybase;
1212 ulen = sv_len_utf8(lsv);
1229 sv_pos_u2b(lsv, &p, 0);
1234 mg->mg_flags &= ~MGf_MINMATCH;
1240 magic_getglob(SV *sv, MAGIC *mg)
1242 if (SvFAKE(sv)) { /* FAKE globs can get coerced */
1244 gv_efullname3(sv,((GV*)sv), "*");
1248 gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
1253 magic_setglob(SV *sv, MAGIC *mg)
1260 s = SvPV(sv, PL_na);
1261 if (*s == '*' && s[1])
1263 gv = gv_fetchpv(s,TRUE, SVt_PVGV);
1268 GvGP(sv) = gp_ref(GvGP(gv));
1273 magic_getsubstr(SV *sv, MAGIC *mg)
1276 SV *lsv = LvTARG(sv);
1277 char *tmps = SvPV(lsv,len);
1278 I32 offs = LvTARGOFF(sv);
1279 I32 rem = LvTARGLEN(sv);
1283 if (rem + offs > len)
1285 sv_setpvn(sv, tmps + offs, (STRLEN)rem);
1290 magic_setsubstr(SV *sv, MAGIC *mg)
1293 char *tmps = SvPV(sv,len);
1294 sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
1299 magic_gettaint(SV *sv, MAGIC *mg)
1302 TAINT_IF((mg->mg_len & 1) ||
1303 (mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
1308 magic_settaint(SV *sv, MAGIC *mg)
1311 if (PL_localizing) {
1312 if (PL_localizing == 1)
1317 else if (PL_tainted)
1325 magic_getvec(SV *sv, MAGIC *mg)
1327 SV *lsv = LvTARG(sv);
1329 unsigned long retnum;
1339 s = (unsigned char *) SvPV(lsv, lsvlen);
1340 offset = LvTARGOFF(sv);
1341 size = LvTARGLEN(sv);
1342 len = (offset + size + 7) / 8;
1344 /* Copied from pp_vec() */
1352 if (offset >= lsvlen)
1355 retnum = (unsigned long) s[offset] << 8;
1357 else if (size == 32) {
1358 if (offset >= lsvlen)
1360 else if (offset + 1 >= lsvlen)
1361 retnum = (unsigned long) s[offset] << 24;
1362 else if (offset + 2 >= lsvlen)
1363 retnum = ((unsigned long) s[offset] << 24) +
1364 ((unsigned long) s[offset + 1] << 16);
1366 retnum = ((unsigned long) s[offset] << 24) +
1367 ((unsigned long) s[offset + 1] << 16) +
1368 (s[offset + 2] << 8);
1373 retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
1378 else if (size == 16)
1379 retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
1380 else if (size == 32)
1381 retnum = ((unsigned long) s[offset] << 24) +
1382 ((unsigned long) s[offset + 1] << 16) +
1383 (s[offset + 2] << 8) + s[offset+3];
1386 sv_setuv(sv, (UV)retnum);
1391 magic_setvec(SV *sv, MAGIC *mg)
1393 do_vecset(sv); /* XXX slurp this routine */
1398 magic_getdefelem(SV *sv, MAGIC *mg)
1401 if (LvTARGLEN(sv)) {
1403 SV *ahv = LvTARG(sv);
1404 if (SvTYPE(ahv) == SVt_PVHV) {
1405 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
1410 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
1416 AV* av = (AV*)LvTARG(sv);
1417 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
1418 targ = AvARRAY(av)[LvTARGOFF(sv)];
1420 if (targ && targ != &PL_sv_undef) {
1421 dTHR; /* just for SvREFCNT_dec */
1422 /* somebody else defined it for us */
1423 SvREFCNT_dec(LvTARG(sv));
1424 LvTARG(sv) = SvREFCNT_inc(targ);
1426 SvREFCNT_dec(mg->mg_obj);
1427 mg->mg_obj = Nullsv;
1428 mg->mg_flags &= ~MGf_REFCOUNTED;
1433 sv_setsv(sv, targ ? targ : &PL_sv_undef);
1438 magic_setdefelem(SV *sv, MAGIC *mg)
1443 sv_setsv(LvTARG(sv), sv);
1444 SvSETMAGIC(LvTARG(sv));
1450 vivify_defelem(SV *sv)
1452 dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
1456 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
1459 SV *ahv = LvTARG(sv);
1460 if (SvTYPE(ahv) == SVt_PVHV) {
1461 HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
1466 SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
1470 if (!value || value == &PL_sv_undef)
1471 croak(no_helem, SvPV(mg->mg_obj, PL_na));
1474 AV* av = (AV*)LvTARG(sv);
1475 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
1476 LvTARG(sv) = Nullsv; /* array can't be extended */
1478 SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
1479 if (!svp || (value = *svp) == &PL_sv_undef)
1480 croak(no_aelem, (I32)LvTARGOFF(sv));
1483 (void)SvREFCNT_inc(value);
1484 SvREFCNT_dec(LvTARG(sv));
1487 SvREFCNT_dec(mg->mg_obj);
1488 mg->mg_obj = Nullsv;
1489 mg->mg_flags &= ~MGf_REFCOUNTED;
1493 magic_setmglob(SV *sv, MAGIC *mg)
1501 magic_setbm(SV *sv, MAGIC *mg)
1503 sv_unmagic(sv, 'B');
1509 magic_setfm(SV *sv, MAGIC *mg)
1511 sv_unmagic(sv, 'f');
1517 magic_setuvar(SV *sv, MAGIC *mg)
1519 struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
1521 if (uf && uf->uf_set)
1522 (*uf->uf_set)(uf->uf_index, sv);
1527 magic_freeregexp(SV *sv, MAGIC *mg)
1529 regexp *re = (regexp *)mg->mg_obj;
1534 #ifdef USE_LOCALE_COLLATE
1536 magic_setcollxfrm(SV *sv, MAGIC *mg)
1539 * René Descartes said "I think not."
1540 * and vanished with a faint plop.
1543 Safefree(mg->mg_ptr);
1549 #endif /* USE_LOCALE_COLLATE */
1552 magic_set(SV *sv, MAGIC *mg)
1558 switch (*mg->mg_ptr) {
1559 case '\001': /* ^A */
1560 sv_setsv(PL_bodytarget, sv);
1562 case '\002': /* ^B */
1563 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1564 if (memEQ(SvPVX(sv), WARN_ALLstring, WARNsize))
1565 compiling.cop_warnings = WARN_ALL;
1566 else if (memEQ(SvPVX(sv), WARN_NONEstring, WARNsize))
1567 compiling.cop_warnings = WARN_NONE;
1569 if (compiling.cop_warnings != WARN_NONE &&
1570 compiling.cop_warnings != WARN_ALL)
1571 sv_setsv(compiling.cop_warnings, sv);
1573 compiling.cop_warnings = newSVsv(sv) ;
1577 case '\004': /* ^D */
1578 PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
1579 DEBUG_x(dump_all());
1581 case '\005': /* ^E */
1583 set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1586 SetLastError( SvIV(sv) );
1588 /* will anyone ever use this? */
1589 SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
1593 case '\006': /* ^F */
1594 PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1596 case '\010': /* ^H */
1597 PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1599 case '\011': /* ^I */ /* NOT \t in EBCDIC */
1601 Safefree(PL_inplace);
1603 PL_inplace = savepv(SvPV(sv,PL_na));
1605 PL_inplace = Nullch;
1607 case '\017': /* ^O */
1609 Safefree(PL_osname);
1611 PL_osname = savepv(SvPV(sv,PL_na));
1615 case '\020': /* ^P */
1616 PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1618 case '\024': /* ^T */
1620 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
1622 PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1625 case '\027': /* ^W */
1626 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
1627 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1628 PL_dowarn = (i ? G_WARN_ON : G_WARN_OFF) ;
1632 if (PL_localizing) {
1633 if (PL_localizing == 1)
1634 save_sptr((SV**)&PL_last_in_gv);
1636 else if (SvOK(sv) && GvIO(PL_last_in_gv))
1637 IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
1640 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
1641 IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1642 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1645 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
1646 IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
1647 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
1650 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1653 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1654 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
1655 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
1658 IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1662 IO *io = GvIOp(PL_defoutgv);
1663 if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
1664 IoFLAGS(io) &= ~IOf_FLUSH;
1666 if (!(IoFLAGS(io) & IOf_FLUSH)) {
1667 PerlIO *ofp = IoOFP(io);
1669 (void)PerlIO_flush(ofp);
1670 IoFLAGS(io) |= IOf_FLUSH;
1676 i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1677 PL_multiline = (i != 0);
1680 SvREFCNT_dec(PL_nrs);
1681 PL_nrs = newSVsv(sv);
1682 SvREFCNT_dec(PL_rs);
1683 PL_rs = SvREFCNT_inc(PL_nrs);
1688 if (SvOK(sv) || SvGMAGICAL(sv))
1689 PL_ors = savepv(SvPV(sv,PL_orslen));
1698 PL_ofs = savepv(SvPV(sv, PL_ofslen));
1703 PL_ofmt = savepv(SvPV(sv,PL_na));
1706 PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1709 #ifdef COMPLEX_STATUS
1710 if (PL_localizing == 2) {
1711 PL_statusvalue = LvTARGOFF(sv);
1712 PL_statusvalue_vms = LvTARGLEN(sv);
1716 #ifdef VMSISH_STATUS
1718 STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
1721 STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
1724 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
1725 (SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
1728 PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1729 if (PL_delaymagic) {
1730 PL_delaymagic |= DM_RUID;
1731 break; /* don't do magic till later */
1734 (void)setruid((Uid_t)PL_uid);
1737 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
1739 #ifdef HAS_SETRESUID
1740 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
1742 if (PL_uid == PL_euid) /* special case $< = $> */
1743 (void)PerlProc_setuid(PL_uid);
1745 PL_uid = (I32)PerlProc_getuid();
1746 croak("setruid() not implemented");
1751 PL_uid = (I32)PerlProc_getuid();
1752 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1755 PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1756 if (PL_delaymagic) {
1757 PL_delaymagic |= DM_EUID;
1758 break; /* don't do magic till later */
1761 (void)seteuid((Uid_t)PL_euid);
1764 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
1766 #ifdef HAS_SETRESUID
1767 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
1769 if (PL_euid == PL_uid) /* special case $> = $< */
1770 PerlProc_setuid(PL_euid);
1772 PL_euid = (I32)PerlProc_geteuid();
1773 croak("seteuid() not implemented");
1778 PL_euid = (I32)PerlProc_geteuid();
1779 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1782 PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1783 if (PL_delaymagic) {
1784 PL_delaymagic |= DM_RGID;
1785 break; /* don't do magic till later */
1788 (void)setrgid((Gid_t)PL_gid);
1791 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
1793 #ifdef HAS_SETRESGID
1794 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
1796 if (PL_gid == PL_egid) /* special case $( = $) */
1797 (void)PerlProc_setgid(PL_gid);
1799 PL_gid = (I32)PerlProc_getgid();
1800 croak("setrgid() not implemented");
1805 PL_gid = (I32)PerlProc_getgid();
1806 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1809 #ifdef HAS_SETGROUPS
1811 char *p = SvPV(sv, PL_na);
1812 Groups_t gary[NGROUPS];
1814 SET_NUMERIC_STANDARD();
1817 PL_egid = I_V(atof(p));
1818 for (i = 0; i < NGROUPS; ++i) {
1819 while (*p && !isSPACE(*p))
1825 gary[i] = I_V(atof(p));
1828 (void)setgroups(i, gary);
1830 #else /* HAS_SETGROUPS */
1831 PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
1832 #endif /* HAS_SETGROUPS */
1833 if (PL_delaymagic) {
1834 PL_delaymagic |= DM_EGID;
1835 break; /* don't do magic till later */
1838 (void)setegid((Gid_t)PL_egid);
1841 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
1843 #ifdef HAS_SETRESGID
1844 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
1846 if (PL_egid == PL_gid) /* special case $) = $( */
1847 (void)PerlProc_setgid(PL_egid);
1849 PL_egid = (I32)PerlProc_getegid();
1850 croak("setegid() not implemented");
1855 PL_egid = (I32)PerlProc_getegid();
1856 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1859 PL_chopset = SvPV_force(sv,PL_na);
1865 /* See if all the arguments are contiguous in memory */
1866 for (i = 1; i < PL_origargc; i++) {
1867 if (PL_origargv[i] == s + 1
1869 || PL_origargv[i] == s + 2
1872 s += strlen(++s); /* this one is ok too */
1876 /* can grab env area too? */
1877 if (PL_origenviron && (PL_origenviron[0] == s + 1
1879 || (PL_origenviron[0] == s + 9 && (s += 8))
1882 my_setenv("NoNe SuCh", Nullch);
1883 /* force copy of environment */
1884 for (i = 0; PL_origenviron[i]; i++)
1885 if (PL_origenviron[i] == s + 1)
1890 PL_origalen = s - PL_origargv[0];
1892 s = SvPV_force(sv,len);
1894 if (i >= PL_origalen) {
1896 /* don't allow system to limit $0 seen by script */
1897 /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
1898 Copy(s, PL_origargv[0], i, char);
1899 s = PL_origargv[0]+i;
1903 Copy(s, PL_origargv[0], i, char);
1904 s = PL_origargv[0]+i;
1906 while (++i < PL_origalen)
1908 s = PL_origargv[0]+i;
1909 for (i = 1; i < PL_origargc; i++)
1910 PL_origargv[i] = Nullch;
1915 sv_setsv(thr->errsv, sv);
1917 #endif /* USE_THREADS */
1924 magic_mutexfree(SV *sv, MAGIC *mg)
1927 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
1928 (unsigned long)thr, (unsigned long)sv);)
1930 croak("panic: magic_mutexfree");
1931 MUTEX_DESTROY(MgMUTEXP(mg));
1932 COND_DESTROY(MgCONDP(mg));
1936 #endif /* USE_THREADS */
1941 register char **sigv;
1943 for (sigv = sig_name+1; *sigv; sigv++)
1944 if (strEQ(sig,*sigv))
1945 return sig_num[sigv - sig_name];
1947 if (strEQ(sig,"CHLD"))
1951 if (strEQ(sig,"CLD"))
1960 unwind_handler_stack(void *p)
1963 U32 flags = *(U32*)p;
1966 PL_savestack_ix -= 5; /* Unprotect save in progress. */
1967 /* cxstack_ix-- Not needed, die already unwound it. */
1969 SvREFCNT_dec(sig_sv);
1978 SV *sv, *tSv = PL_Sv;
1982 I32 o_save_i = PL_savestack_ix, type;
1985 if (PL_savestack_ix + 15 <= PL_savestack_max)
1987 if (PL_markstack_ptr < PL_markstack_max - 2)
1989 if (PL_retstack_ix < PL_retstack_max - 2)
1991 if (PL_scopestack_ix < PL_scopestack_max - 3)
1995 die("Signal SIG%s received, but no signal handler set.\n",
1998 /* Max number of items pushed there is 3*n or 4. We cannot fix
1999 infinity, so we fix 4 (in fact 5): */
2001 PL_savestack_ix += 5; /* Protect save in progress. */
2002 o_save_i = PL_savestack_ix;
2003 SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
2006 PL_markstack_ptr++; /* Protect mark. */
2009 PL_retstack[PL_retstack_ix] = NULL;
2012 PL_scopestack_ix += 1;
2013 /* sv_2cv is too complicated, try a simpler variant first: */
2014 if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
2015 || SvTYPE(cv) != SVt_PVCV)
2016 cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
2018 if (!cv || !CvROOT(cv)) {
2019 if (ckWARN(WARN_SIGNAL))
2020 warner(WARN_SIGNAL, "SIG%s handler \"%s\" not defined.\n",
2021 sig_name[sig], (gv ? GvENAME(gv)
2028 if(psig_name[sig]) {
2029 sv = SvREFCNT_inc(psig_name[sig]);
2033 sv = sv_newmortal();
2034 sv_setpv(sv,sig_name[sig]);
2037 PUSHSTACKi(PERLSI_SIGNAL);
2042 perl_call_sv((SV*)cv, G_DISCARD);
2047 PL_savestack_ix -= 8; /* Unprotect save in progress. */
2053 PL_scopestack_ix -= 1;
2056 PL_op = myop; /* Apparently not needed... */
2058 PL_Sv = tSv; /* Restore global temporaries. */