X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=mg.c;h=b032bf3f9557af2fff3055a3947a4a1a50c75968;hb=39e571d41067215a80f26089b260f1418caeb36b;hp=cab0e5973ef292c9bbf92bf49f313b613f1e980d;hpb=fc36a67e8855d031b2a6921819d899eb149eee2d;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/mg.c b/mg.c
index cab0e59..b032bf3 100644
--- a/mg.c
+++ b/mg.c
@@ -39,9 +39,7 @@ typedef struct magic_state MGS;
 static void restore_magic _((void *p));
 
 static void
-save_magic(mgs, sv)
-MGS* mgs;
-SV* sv;
+save_magic(MGS *mgs, SV *sv)
 {
     assert(SvMAGICAL(sv));
 
@@ -55,8 +53,7 @@ SV* sv;
 }
 
 static void
-restore_magic(p)
-void* p;
+restore_magic(void *p)
 {
     MGS* mgs = (MGS*)p;
     SV* sv = mgs->mgs_sv;
@@ -74,8 +71,7 @@ void* p;
 
 
 void
-mg_magical(sv)
-SV* sv;
+mg_magical(SV *sv)
 {
     MAGIC* mg;
     for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
@@ -92,8 +88,7 @@ SV* sv;
 }
 
 int
-mg_get(sv)
-SV* sv;
+mg_get(SV *sv)
 {
     MGS mgs;
     MAGIC* mg;
@@ -127,8 +122,7 @@ SV* sv;
 }
 
 int
-mg_set(sv)
-SV* sv;
+mg_set(SV *sv)
 {
     MGS mgs;
     MAGIC* mg;
@@ -153,8 +147,7 @@ SV* sv;
 }
 
 U32
-mg_len(sv)
-SV* sv;
+mg_len(SV *sv)
 {
     MAGIC* mg;
     char *junk;
@@ -179,8 +172,7 @@ SV* sv;
 }
 
 int
-mg_clear(sv)
-SV* sv;
+mg_clear(SV *sv)
 {
     MGS mgs;
     MAGIC* mg;
@@ -201,9 +193,7 @@ SV* sv;
 }
 
 MAGIC*
-mg_find(sv, type)
-SV* sv;
-int type;
+mg_find(SV *sv, int type)
 {
     MAGIC* mg;
     for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
@@ -214,11 +204,7 @@ int type;
 }
 
 int
-mg_copy(sv, nsv, key, klen)
-SV* sv;
-SV* nsv;
-char *key;
-I32 klen;
+mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
 {
     int count = 0;
     MAGIC* mg;
@@ -232,8 +218,7 @@ I32 klen;
 }
 
 int
-mg_free(sv)
-SV* sv;
+mg_free(SV *sv)
 {
     MAGIC* mg;
     MAGIC* moremagic;
@@ -260,10 +245,9 @@ SV* sv;
 #endif
 
 U32
-magic_len(sv, mg)
-SV *sv;
-MAGIC *mg;
+magic_len(SV *sv, MAGIC *mg)
 {
+    dTHR;
     register I32 paren;
     register char *s;
     register I32 i;
@@ -325,10 +309,9 @@ MAGIC *mg;
 }
 
 int
-magic_get(sv, mg)
-SV *sv;
-MAGIC *mg;
+magic_get(SV *sv, MAGIC *mg)
 {
+    dTHR;
     register I32 paren;
     register char *s;
     register I32 i;
@@ -357,8 +340,15 @@ MAGIC *mg;
 	}
 #else
 #ifdef OS2
-	sv_setnv(sv, (double)Perl_rc);
-	sv_setpv(sv, os2error(Perl_rc));
+	if (!(_emx_env & 0x200)) {	/* Under DOS */
+	    sv_setnv(sv, (double)errno);
+	    sv_setpv(sv, errno ? Strerror(errno) : "");
+	} else {
+	    if (errno != errno_isOS2)
+		Perl_rc = _syserrno();
+	    sv_setnv(sv, (double)Perl_rc);
+	    sv_setpv(sv, os2error(Perl_rc));
+	}
 #else
 	sv_setnv(sv, (double)errno);
 	sv_setpv(sv, errno ? Strerror(errno) : "");
@@ -384,6 +374,17 @@ MAGIC *mg;
     case '\020':		/* ^P */
 	sv_setiv(sv, (IV)perldb);
 	break;
+    case '\023':		/* ^S */
+	{
+	    dTHR;
+	    if (lex_state != LEX_NOTPARSING)
+		SvOK_off(sv);
+	    else if (in_eval)
+		sv_setiv(sv, 1);
+	    else
+		sv_setiv(sv, 0);
+	}
+	break;
     case '\024':		/* ^T */
 #ifdef BIG_TIME
  	sv_setnv(sv, basetime);
@@ -397,7 +398,11 @@ MAGIC *mg;
     case '1': case '2': case '3': case '4':
     case '5': case '6': case '7': case '8': case '9': case '&':
 	if (curpm && (rx = curpm->op_pmregexp)) {
-	    paren = atoi(GvENAME((GV*)mg->mg_obj));
+	    /*
+	     * Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
+	     * XXX Does the new way break anything?
+	     */
+	    paren = atoi(mg->mg_ptr);
 	  getparen:
 	    if (paren <= rx->nparens &&
 		(s = rx->startp[paren]) &&
@@ -413,7 +418,7 @@ MAGIC *mg;
 		    }
 		    sv_setpvn(sv,s,i);
 		    if (tainting)
-			tainted = was_tainted || rx->exec_tainted;
+			tainted = was_tainted || RX_MATCH_TAINTED(rx);
 		    break;
 		}
 	    }
@@ -454,11 +459,14 @@ MAGIC *mg;
 #endif
 	break;
     case '?':
-	sv_setiv(sv, (IV)STATUS_CURRENT);
+	{
+	    dTHR;
+	    sv_setiv(sv, (IV)STATUS_CURRENT);
 #ifdef COMPLEX_STATUS
-	LvTARGOFF(sv) = statusvalue;
-	LvTARGLEN(sv) = statusvalue_vms;
+	    LvTARGOFF(sv) = statusvalue;
+	    LvTARGLEN(sv) = statusvalue_vms;
 #endif
+	}
 	break;
     case '^':
 	s = IoTOP_NAME(GvIOp(defoutgv));
@@ -491,7 +499,7 @@ MAGIC *mg;
     case '/':
 	break;
     case '[':
-	sv_setiv(sv, (IV)curcop->cop_arybase);
+	WITH_THR(sv_setiv(sv, (IV)curcop->cop_arybase));
 	break;
     case '|':
 	sv_setiv(sv, (IV)(IoFLAGS(GvIOp(defoutgv)) & IOf_FLUSH) != 0 );
@@ -551,14 +559,17 @@ MAGIC *mg;
 	break;
     case '0':
 	break;
+#ifdef USE_THREADS
+    case '@':
+	sv_setsv(sv, thr->errsv);
+	break;
+#endif /* USE_THREADS */
     }
     return 0;
 }
 
 int
-magic_getuvar(sv, mg)
-SV *sv;
-MAGIC *mg;
+magic_getuvar(SV *sv, MAGIC *mg)
 {
     struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
 
@@ -568,9 +579,7 @@ MAGIC *mg;
 }
 
 int
-magic_setenv(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setenv(SV *sv, MAGIC *mg)
 {
     register char *s;
     char *ptr;
@@ -591,7 +600,7 @@ MAGIC* mg;
     }
 #endif
 
-#if !defined(OS2) && !defined(AMIGAOS) && !defined(_WIN32)
+#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
 			    /* And you'll never guess what the dog had */
 			    /*   in its mouth... */
     if (tainting) {
@@ -626,37 +635,92 @@ MAGIC* mg;
 	    char *strend = s + len;
 
 	    while (s < strend) {
+		char tmpbuf[256];
 		struct stat st;
-		s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf,
+		s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
 			     s, strend, ':', &i);
 		s++;
-		if (i >= sizeof tokenbuf   /* too long -- assume the worst */
-		      || *tokenbuf != '/'
-		      || (Stat(tokenbuf, &st) == 0 && (st.st_mode & 2)) ) {
+		if (i >= sizeof tmpbuf   /* too long -- assume the worst */
+		      || *tmpbuf != '/'
+		      || (Stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
 		    MgTAINTEDDIR_on(mg);
 		    return 0;
 		}
 	    }
 	}
     }
-#endif /* neither OS2 nor AMIGAOS nor _WIN32 */
+#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
 
     return 0;
 }
 
 int
-magic_clearenv(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_clearenv(SV *sv, MAGIC *mg)
 {
     my_setenv(MgPV(mg,na),Nullch);
     return 0;
 }
 
 int
-magic_getsig(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_set_all_env(SV *sv, MAGIC *mg)
+{
+#if defined(VMS)
+    die("Can't make list assignment to %%ENV on this system");
+#else
+    dTHR;
+    if (localizing) {
+	HE* entry;
+	magic_clear_all_env(sv,mg);
+	hv_iterinit((HV*)sv);
+	while (entry = hv_iternext((HV*)sv)) {
+	    I32 keylen;
+	    my_setenv(hv_iterkey(entry, &keylen),
+		      SvPV(hv_iterval((HV*)sv, entry), na));
+	}
+    }
+#endif
+    return 0;
+}
+
+int
+magic_clear_all_env(SV *sv, MAGIC *mg)
+{
+#if defined(VMS)
+    die("Can't make list assignment to %%ENV on this system");
+#else
+#ifdef WIN32
+    char *envv = GetEnvironmentStrings();
+    char *cur = envv;
+    STRLEN len;
+    while (*cur) {
+	char *end = strchr(cur,'=');
+	if (end && end != cur) {
+	    *end = '\0';
+	    my_setenv(cur,Nullch);
+	    *end = '=';
+	    cur += strlen(end+1)+1;
+	}
+	else if ((len = strlen(cur)))
+	    cur += len+1;
+    }
+    FreeEnvironmentStrings(envv);
+#else
+    I32 i;
+
+    if (environ == origenviron)
+	New(901, environ, 1, char*);
+    else
+	for (i = 0; environ[i]; i++)
+	    Safefree(environ[i]);
+    environ[0] = Nullch;
+
+#endif
+#endif
+    return 0;
+}
+
+int
+magic_getsig(SV *sv, MAGIC *mg)
 {
     I32 i;
     /* Are we fetching a signal entry? */
@@ -679,9 +743,7 @@ MAGIC* mg;
     return 0;
 }
 int
-magic_clearsig(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_clearsig(SV *sv, MAGIC *mg)
 {
     I32 i;
     /* Are we clearing a signal entry? */
@@ -700,10 +762,9 @@ MAGIC* mg;
 }
 
 int
-magic_setsig(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setsig(SV *sv, MAGIC *mg)
 {
+    dTHR;
     register char *s;
     I32 i;
     SV** svp;
@@ -740,7 +801,7 @@ MAGIC* mg;
     }
     if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
 	if (i)
-	    (void)rsignal(i, sighandler);
+	    (void)rsignal(i, sighandlerp);
 	else
 	    *svp = SvREFCNT_inc(sv);
 	return 0;
@@ -767,7 +828,7 @@ MAGIC* mg;
 	if (!strchr(s,':') && !strchr(s,'\''))
 	    sv_setpv(sv, form("main::%s", s));
 	if (i)
-	    (void)rsignal(i, sighandler);
+	    (void)rsignal(i, sighandlerp);
 	else
 	    *svp = SvREFCNT_inc(sv);
     }
@@ -775,20 +836,63 @@ MAGIC* mg;
 }
 
 int
-magic_setisa(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setisa(SV *sv, MAGIC *mg)
 {
+    HV *stash;
+    SV **svp;
+    I32 fill;
+    HV *basefields = Nullhv;
+    GV **gvp;
+    GV *gv;
+    HE *he;
+    static char *FIELDS = "FIELDS";
+
     sub_generation++;
+
+    if (mg->mg_type == 'i')
+	return 0;	/* Ignore lower-case version of the magic */
+
+    stash = GvSTASH(mg->mg_obj);
+    svp = AvARRAY((AV*)sv);
+    
+    for (fill = AvFILL((AV*)sv); fill >= 0; fill--, svp++) {
+	HV *basestash = gv_stashsv(*svp, FALSE);
+
+	if (!basestash) {
+	    if (dowarn)
+		warn("No such package \"%_\" in @ISA assignment", *svp);
+	    continue;
+	}
+	gvp = (GV**)hv_fetch(basestash, FIELDS, 6, FALSE);
+	if (gvp && *gvp && GvHV(*gvp)) {
+	    if (basefields)
+		croak("Can't multiply inherit %%FIELDS");
+	    basefields = GvHV(*gvp);
+	}
+    }
+
+    if (!basefields)
+	return 0;
+    
+    gv = (GV*)*hv_fetch(stash, FIELDS, 6, TRUE);
+    if (!isGV(gv))
+	gv_init(gv, stash, FIELDS, 6, TRUE);
+    if (!GvHV(gv))
+	GvHV(gv) = newHV();
+    if (HvKEYS(GvHV(gv)))
+	croak("Inherited %%FIELDS can't override existing %%FIELDS");
+
+    hv_iterinit(GvHV(gv));
+    while ((he = hv_iternext(basefields)))
+	hv_store(GvHV(gv), HeKEY(he), HeKLEN(he), HeVAL(he), HeHASH(he));
+
     return 0;
 }
 
 #ifdef OVERLOAD
 
 int
-magic_setamagic(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setamagic(SV *sv, MAGIC *mg)
 {
     /* HV_badAMAGIC_on(Sv_STASH(sv)); */
     amagic_generation++;
@@ -798,9 +902,7 @@ MAGIC* mg;
 #endif /* OVERLOAD */
 
 int
-magic_setnkeys(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setnkeys(SV *sv, MAGIC *mg)
 {
     if (LvTARG(sv)) {
 	hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
@@ -810,10 +912,7 @@ MAGIC* mg;
 }
 
 static int
-magic_methpack(sv,mg,meth)
-SV* sv;
-MAGIC* mg;
-char *meth;
+magic_methpack(SV *sv, MAGIC *mg, char *meth)
 {
     dSP;
 
@@ -841,9 +940,7 @@ char *meth;
 }
 
 int
-magic_getpack(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_getpack(SV *sv, MAGIC *mg)
 {
     magic_methpack(sv,mg,"FETCH");
     if (mg->mg_ptr)
@@ -852,9 +949,7 @@ MAGIC* mg;
 }
 
 int
-magic_setpack(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setpack(SV *sv, MAGIC *mg)
 {
     dSP;
 
@@ -878,16 +973,12 @@ MAGIC* mg;
 }
 
 int
-magic_clearpack(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_clearpack(SV *sv, MAGIC *mg)
 {
     return magic_methpack(sv,mg,"DELETE");
 }
 
-int magic_wipepack(sv,mg)
-SV* sv;
-MAGIC* mg;
+int magic_wipepack(SV *sv, MAGIC *mg)
 {
     dSP;
 
@@ -901,10 +992,7 @@ MAGIC* mg;
 }
 
 int
-magic_nextpack(sv,mg,key)
-SV* sv;
-MAGIC* mg;
-SV* key;
+magic_nextpack(SV *sv, MAGIC *mg, SV *key)
 {
     dSP;
     char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
@@ -927,18 +1015,15 @@ SV* key;
 }
 
 int
-magic_existspack(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_existspack(SV *sv, MAGIC *mg)
 {
     return magic_methpack(sv,mg,"EXISTS");
 } 
 
 int
-magic_setdbline(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setdbline(SV *sv, MAGIC *mg)
 {
+    dTHR;
     OP *o;
     I32 i;
     GV* gv;
@@ -956,33 +1041,30 @@ MAGIC* mg;
 }
 
 int
-magic_getarylen(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_getarylen(SV *sv, MAGIC *mg)
 {
+    dTHR;
     sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + curcop->cop_arybase);
     return 0;
 }
 
 int
-magic_setarylen(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setarylen(SV *sv, MAGIC *mg)
 {
+    dTHR;
     av_fill((AV*)mg->mg_obj, SvIV(sv) - curcop->cop_arybase);
     return 0;
 }
 
 int
-magic_getpos(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_getpos(SV *sv, MAGIC *mg)
 {
     SV* lsv = LvTARG(sv);
     
     if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
 	mg = mg_find(lsv, 'g');
 	if (mg && mg->mg_len >= 0) {
+	    dTHR;
 	    sv_setiv(sv, mg->mg_len + curcop->cop_arybase);
 	    return 0;
 	}
@@ -992,9 +1074,7 @@ MAGIC* mg;
 }
 
 int
-magic_setpos(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setpos(SV *sv, MAGIC *mg)
 {
     SV* lsv = LvTARG(sv);
     SSize_t pos;
@@ -1016,7 +1096,7 @@ MAGIC* mg;
     }
     len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
 
-    pos = SvIV(sv) - curcop->cop_arybase;
+    WITH_THR(pos = SvIV(sv) - curcop->cop_arybase);
     if (pos < 0) {
 	pos += len;
 	if (pos < 0)
@@ -1031,9 +1111,7 @@ MAGIC* mg;
 }
 
 int
-magic_getglob(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_getglob(SV *sv, MAGIC *mg)
 {
     if (SvFAKE(sv)) {			/* FAKE globs can get coerced */
 	SvFAKE_off(sv);
@@ -1046,9 +1124,7 @@ MAGIC* mg;
 }
 
 int
-magic_setglob(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setglob(SV *sv, MAGIC *mg)
 {
     register char *s;
     GV* gv;
@@ -1068,9 +1144,7 @@ MAGIC* mg;
 }
 
 int
-magic_setsubstr(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setsubstr(SV *sv, MAGIC *mg)
 {
     STRLEN len;
     char *tmps = SvPV(sv,len);
@@ -1079,20 +1153,18 @@ MAGIC* mg;
 }
 
 int
-magic_gettaint(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_gettaint(SV *sv, MAGIC *mg)
 {
+    dTHR;
     TAINT_IF((mg->mg_len & 1) ||
 	     (mg->mg_len & 2) && mg->mg_obj == sv);	/* kludge */
     return 0;
 }
 
 int
-magic_settaint(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_settaint(SV *sv, MAGIC *mg)
 {
+    dTHR;
     if (localizing) {
 	if (localizing == 1)
 	    mg->mg_len <<= 1;
@@ -1107,18 +1179,14 @@ MAGIC* mg;
 }
 
 int
-magic_setvec(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setvec(SV *sv, MAGIC *mg)
 {
     do_vecset(sv);	/* XXX slurp this routine */
     return 0;
 }
 
 int
-magic_getdefelem(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_getdefelem(SV *sv, MAGIC *mg)
 {
     SV *targ = Nullsv;
     if (LvTARGLEN(sv)) {
@@ -1134,6 +1202,7 @@ MAGIC* mg;
 		targ = AvARRAY(av)[LvTARGOFF(sv)];
 	}
 	if (targ && targ != &sv_undef) {
+	    dTHR;		/* just for SvREFCNT_dec */
 	    /* somebody else defined it for us */
 	    SvREFCNT_dec(LvTARG(sv));
 	    LvTARG(sv) = SvREFCNT_inc(targ);
@@ -1150,9 +1219,7 @@ MAGIC* mg;
 }
 
 int
-magic_setdefelem(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setdefelem(SV *sv, MAGIC *mg)
 {
     if (LvTARGLEN(sv))
 	vivify_defelem(sv);
@@ -1164,18 +1231,16 @@ MAGIC* mg;
 }
 
 int
-magic_freedefelem(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_freedefelem(SV *sv, MAGIC *mg)
 {
     SvREFCNT_dec(LvTARG(sv));
     return 0;
 }
 
 void
-vivify_defelem(sv)
-SV* sv;
+vivify_defelem(SV *sv)
 {
+    dTHR;			/* just for SvREFCNT_inc and SvREFCNT_dec*/
     MAGIC* mg;
     SV* value;
 
@@ -1197,7 +1262,7 @@ SV* sv;
 		croak(no_aelem, (I32)LvTARGOFF(sv));
 	}
     }
-    SvREFCNT_inc(value);
+    (void)SvREFCNT_inc(value);
     SvREFCNT_dec(LvTARG(sv));
     LvTARG(sv) = value;
     LvTARGLEN(sv) = 0;
@@ -1207,9 +1272,7 @@ SV* sv;
 }
 
 int
-magic_setmglob(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setmglob(SV *sv, MAGIC *mg)
 {
     mg->mg_len = -1;
     SvSCREAM_off(sv);
@@ -1217,9 +1280,7 @@ MAGIC* mg;
 }
 
 int
-magic_setbm(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setbm(SV *sv, MAGIC *mg)
 {
     sv_unmagic(sv, 'B');
     SvVALID_off(sv);
@@ -1227,9 +1288,7 @@ MAGIC* mg;
 }
 
 int
-magic_setfm(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setfm(SV *sv, MAGIC *mg)
 {
     sv_unmagic(sv, 'f');
     SvCOMPILED_off(sv);
@@ -1237,9 +1296,7 @@ MAGIC* mg;
 }
 
 int
-magic_setuvar(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setuvar(SV *sv, MAGIC *mg)
 {
     struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
 
@@ -1248,11 +1305,17 @@ MAGIC* mg;
     return 0;
 }
 
+int
+magic_freeregexp(SV *sv, MAGIC *mg)
+{
+    regexp *re = (regexp *)mg->mg_obj;
+    ReREFCNT_dec(re);
+    return 0;
+}
+
 #ifdef USE_LOCALE_COLLATE
 int
-magic_setcollxfrm(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_setcollxfrm(SV *sv, MAGIC *mg)
 {
     /*
      * René Descartes said "I think not."
@@ -1268,10 +1331,9 @@ MAGIC* mg;
 #endif /* USE_LOCALE_COLLATE */
 
 int
-magic_set(sv,mg)
-SV* sv;
-MAGIC* mg;
+magic_set(SV *sv, MAGIC *mg)
 {
+    dTHR;
     register char *s;
     I32 i;
     STRLEN len;
@@ -1314,14 +1376,7 @@ MAGIC* mg;
 	    osname = Nullch;
 	break;
     case '\020':	/* ^P */
-	i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
-	if (i != perldb) {
-	    if (perldb)
-		oldlastpm = curpm;
-	    else
-		curpm = oldlastpm;
-	}
-	perldb = i;
+	perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
 	break;
     case '\024':	/* ^T */
 #ifdef BIG_TIME
@@ -1569,16 +1624,28 @@ MAGIC* mg;
 	    s += strlen(s);
 	    /* See if all the arguments are contiguous in memory */
 	    for (i = 1; i < origargc; i++) {
-		if (origargv[i] == s + 1)
+		if (origargv[i] == s + 1
+#ifdef OS2
+		    || origargv[i] == s + 2
+#endif 
+		   )
 		    s += strlen(++s);	/* this one is ok too */
+		else
+		    break;
 	    }
 	    /* can grab env area too? */
-	    if (origenviron && origenviron[0] == s + 1) {
-		my_setenv("NoNeSuCh", Nullch);
+	    if (origenviron && (origenviron[0] == s + 1
+#ifdef OS2
+				|| (origenviron[0] == s + 9 && (s += 8))
+#endif 
+	       )) {
+		my_setenv("NoNe  SuCh", Nullch);
 					    /* force copy of environment */
 		for (i = 0; origenviron[i]; i++)
 		    if (origenviron[i] == s + 1)
 			s += strlen(++s);
+		    else
+			break;
 	    }
 	    origalen = s - origargv[0];
 	}
@@ -1586,9 +1653,11 @@ MAGIC* mg;
 	i = len;
 	if (i >= origalen) {
 	    i = origalen;
-	    SvCUR_set(sv, i);
-	    *SvEND(sv) = '\0';
+	    /* don't allow system to limit $0 seen by script */
+	    /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
 	    Copy(s, origargv[0], i, char);
+	    s = origargv[0]+i;
+	    *s = '\0';
 	}
 	else {
 	    Copy(s, origargv[0], i, char);
@@ -1601,13 +1670,33 @@ MAGIC* mg;
 		origargv[i] = Nullch;
 	}
 	break;
+#ifdef USE_THREADS
+    case '@':
+	sv_setsv(thr->errsv, sv);
+	break;
+#endif /* USE_THREADS */
     }
     return 0;
 }
 
+#ifdef USE_THREADS
+int
+magic_mutexfree(SV *sv, MAGIC *mg)
+{
+    dTHR;
+    DEBUG_L(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
+			  (unsigned long)thr, (unsigned long)sv);)
+    if (MgOWNER(mg))
+	croak("panic: magic_mutexfree");
+    MUTEX_DESTROY(MgMUTEXP(mg));
+    COND_DESTROY(MgCONDP(mg));
+    SvREFCNT_dec(sv);
+    return 0;
+}
+#endif /* USE_THREADS */
+
 I32
-whichsig(sig)
-char *sig;
+whichsig(char *sig)
 {
     register char **sigv;
 
@@ -1625,27 +1714,85 @@ char *sig;
     return 0;
 }
 
+static SV* sig_sv;
+
+static void
+unwind_handler_stack(void *p)
+{
+    dTHR;
+    U32 flags = *(U32*)p;
+
+    if (flags & 1)
+	savestack_ix -= 5; /* Unprotect save in progress. */
+    /* cxstack_ix-- Not needed, die already unwound it. */
+    if (flags & 64)
+	SvREFCNT_dec(sig_sv);
+}
+
 Signal_t
-sighandler(sig)
-int sig;
+sighandler(int sig)
 {
     dSP;
-    GV *gv;
+    GV *gv = Nullgv;
     HV *st;
-    SV *sv;
-    CV *cv;
+    SV *sv, *tSv = Sv;
+    CV *cv = Nullcv;
     AV *oldstack;
-
+    OP *myop = op;
+    U32 flags = 0;
+    I32 o_save_i = savestack_ix, type;
+    PERL_CONTEXT *cx;
+    XPV *tXpv = Xpv;
+    
+    if (savestack_ix + 15 <= savestack_max)
+	flags |= 1;
+    if (cxstack_ix < cxstack_max - 2)
+	flags |= 2;
+    if (markstack_ptr < markstack_max - 2)
+	flags |= 4;
+    if (retstack_ix < retstack_max - 2)
+	flags |= 8;
+    if (scopestack_ix < scopestack_max - 3)
+	flags |= 16;
+
+    if (flags & 2) {		/* POPBLOCK may decrease cxstack too early. */
+	cxstack_ix++;		/* Protect from overwrite. */
+	cx = &cxstack[cxstack_ix];
+	type = cx->cx_type;		/* Can be during partial write. */
+	cx->cx_type = CXt_NULL;		/* Make it safe for unwind. */
+    }
     if (!psig_ptr[sig])
 	die("Signal SIG%s received, but no signal handler set.\n",
 	    sig_name[sig]);
 
-    cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
+    /* Max number of items pushed there is 3*n or 4. We cannot fix
+       infinity, so we fix 4 (in fact 5): */
+    if (flags & 1) {
+	savestack_ix += 5;		/* Protect save in progress. */
+	o_save_i = savestack_ix;
+	SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
+    }
+    if (flags & 4) 
+	markstack_ptr++;		/* Protect mark. */
+    if (flags & 8) {
+	retstack_ix++;
+	retstack[retstack_ix] = NULL;
+    }
+    if (flags & 16)
+	scopestack_ix += 1;
+    /* sv_2cv is too complicated, try a simpler variant first: */
+    if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig])) 
+	|| SvTYPE(cv) != SVt_PVCV)
+	cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
+
     if (!cv || !CvROOT(cv)) {
 	if (dowarn)
 	    warn("SIG%s handler \"%s\" not defined.\n",
-		sig_name[sig], GvENAME(gv) );
-	return;
+		sig_name[sig], (gv ? GvENAME(gv)
+				: ((cv && CvGV(cv))
+				   ? GvENAME(CvGV(cv))
+				   : "__ANON__")));
+	goto cleanup;
     }
 
     oldstack = curstack;
@@ -1653,9 +1800,11 @@ int sig;
 	AvFILL(signalstack) = 0;
     SWITCHSTACK(curstack, signalstack);
 
-    if(psig_name[sig])
+    if(psig_name[sig]) {
     	sv = SvREFCNT_inc(psig_name[sig]);
-    else {
+	flags |= 64;
+	sig_sv = sv;
+    } else {
 	sv = sv_newmortal();
 	sv_setpv(sv,sig_name[sig]);
     }
@@ -1666,6 +1815,26 @@ int sig;
     perl_call_sv((SV*)cv, G_DISCARD);
 
     SWITCHSTACK(signalstack, oldstack);
-
+cleanup:
+    if (flags & 1)
+	savestack_ix -= 8; /* Unprotect save in progress. */
+    if (flags & 2) {
+	cxstack[cxstack_ix].cx_type = type;
+	cxstack_ix -= 1;
+    }
+    if (flags & 4) 
+	markstack_ptr--;
+    if (flags & 8) 
+	retstack_ix--;
+    if (flags & 16)
+	scopestack_ix -= 1;
+    if (flags & 64)
+	SvREFCNT_dec(sv);
+    op = myop;			/* Apparently not needed... */
+    
+    Sv = tSv;			/* Restore global temporaries. */
+    Xpv = tXpv;
     return;
 }
+
+