1 files changed, 891 insertions, 0 deletions

diff --git a/mg.c b/mg.c
new file mode 100644
index 0000000000..00af4c420d
--- /dev/null
+++ b/mg.c
@@ -0,0 +1,891 @@
+/* $RCSfile: hash.c,v $$Revision: 4.1 $$Date: 92/08/07 18:21:48 $
+ *
+ *    Copyright (c) 1993, Larry Wall
+ *
+ *    You may distribute under the terms of either the GNU General Public
+ *    License or the Artistic License, as specified in the README file.
+ *
+ * $Log:        hash.c,v $
+ */
+
+#include "EXTERN.h"
+#include "perl.h"
+
+int
+mg_get(sv)
+SV* sv;
+{
+    MAGIC* mg;
+    for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+	MGVTBL* vtbl = mg->mg_virtual;
+	if (vtbl && vtbl->svt_get)
+	    (*vtbl->svt_get)(sv, mg);
+    }
+    return 0;
+}
+
+int
+mg_set(sv)
+SV* sv;
+{
+    MAGIC* mg;
+    for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+	MGVTBL* vtbl = mg->mg_virtual;
+	if (vtbl && vtbl->svt_set)
+	    (*vtbl->svt_set)(sv, mg);
+    }
+    return 0;
+}
+
+U32
+mg_len(sv)
+SV* sv;
+{
+    MAGIC* mg;
+    for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+	MGVTBL* vtbl = mg->mg_virtual;
+	if (vtbl && vtbl->svt_len)
+	    return (*vtbl->svt_len)(sv, mg);
+    }
+    if (!SvPOK(sv) && SvNIOK(sv))
+	sv_2pv(sv);
+    if (SvPOK(sv))
+	return SvCUR(sv);
+    return 0;
+}
+
+int
+mg_clear(sv)
+SV* sv;
+{
+    MAGIC* mg;
+    for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+	MGVTBL* vtbl = mg->mg_virtual;
+	if (vtbl && vtbl->svt_clear)
+	    (*vtbl->svt_clear)(sv, mg);
+    }
+    return 0;
+}
+
+int
+mg_free(sv, type)
+SV* sv;
+char type;
+{
+    MAGIC* mg;
+    MAGIC** mgp = &SvMAGIC(sv);
+    for (mg = *mgp; mg; mg = *mgp) {
+	if (mg->mg_type == type) {
+	    MGVTBL* vtbl = mg->mg_virtual;
+	    *mgp = mg->mg_moremagic;
+	    if (vtbl && vtbl->svt_free)
+		(*vtbl->svt_free)(sv, mg);
+	    if (mg->mg_ptr)
+		Safefree(mg->mg_ptr);
+	    Safefree(mg);
+	}
+	else
+	    mgp = &mg->mg_moremagic;
+    }
+    return 0;
+}
+
+int
+mg_freeall(sv)
+SV* sv;
+{
+    MAGIC* mg;
+    MAGIC* moremagic;
+    for (mg = SvMAGIC(sv); mg; mg = moremagic) {
+	MGVTBL* vtbl = mg->mg_virtual;
+	moremagic = mg->mg_moremagic;
+	if (vtbl && vtbl->svt_free)
+	    (*vtbl->svt_free)(sv, mg);
+	if (mg->mg_ptr)
+	    Safefree(mg->mg_ptr);
+	Safefree(mg);
+    }
+    SvMAGIC(sv) = 0;
+    return 0;
+}
+
+#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
+#include <signal.h>
+#endif
+
+#ifdef VOIDSIG
+#define handlertype void
+#else
+#define handlertype int
+#endif
+
+static handlertype sighandler();
+
+int
+magic_get(sv, mg)
+SV *sv;
+MAGIC *mg;
+{
+    register I32 paren;
+    register char *s;
+    register I32 i;
+
+    switch (*mg->mg_ptr) {
+    case '\004':		/* ^D */
+	sv_setiv(sv,(I32)(debug & 32767));
+	break;
+    case '\006':		/* ^F */
+	sv_setiv(sv,(I32)maxsysfd);
+	break;
+    case '\t':			/* ^I */
+	if (inplace)
+	    sv_setpv(sv, inplace);
+	else
+	    sv_setsv(sv,&sv_undef);
+	break;
+    case '\020':		/* ^P */
+	sv_setiv(sv,(I32)perldb);
+	break;
+    case '\024':		/* ^T */
+	sv_setiv(sv,(I32)basetime);
+	break;
+    case '\027':		/* ^W */
+	sv_setiv(sv,(I32)dowarn);
+	break;
+    case '1': case '2': case '3': case '4':
+    case '5': case '6': case '7': case '8': case '9': case '&':
+	if (curpm) {
+	    paren = atoi(GvENAME(mg->mg_obj));
+	  getparen:
+	    if (curpm->op_pmregexp &&
+	      paren <= curpm->op_pmregexp->nparens &&
+	      (s = curpm->op_pmregexp->startp[paren]) ) {
+		i = curpm->op_pmregexp->endp[paren] - s;
+		if (i >= 0)
+		    sv_setpvn(sv,s,i);
+		else
+		    sv_setsv(sv,&sv_undef);
+	    }
+	    else
+		sv_setsv(sv,&sv_undef);
+	}
+	break;
+    case '+':
+	if (curpm) {
+	    paren = curpm->op_pmregexp->lastparen;
+	    goto getparen;
+	}
+	break;
+    case '`':
+	if (curpm) {
+	    if (curpm->op_pmregexp &&
+	      (s = curpm->op_pmregexp->subbeg) ) {
+		i = curpm->op_pmregexp->startp[0] - s;
+		if (i >= 0)
+		    sv_setpvn(sv,s,i);
+		else
+		    sv_setpvn(sv,"",0);
+	    }
+	    else
+		sv_setpvn(sv,"",0);
+	}
+	break;
+    case '\'':
+	if (curpm) {
+	    if (curpm->op_pmregexp &&
+	      (s = curpm->op_pmregexp->endp[0]) ) {
+		sv_setpvn(sv,s, curpm->op_pmregexp->subend - s);
+	    }
+	    else
+		sv_setpvn(sv,"",0);
+	}
+	break;
+    case '.':
+#ifndef lint
+	if (last_in_gv && GvIO(last_in_gv)) {
+	    sv_setiv(sv,(I32)GvIO(last_in_gv)->lines);
+	}
+#endif
+	break;
+    case '?':
+	sv_setiv(sv,(I32)statusvalue);
+	break;
+    case '^':
+	s = GvIO(defoutgv)->top_name;
+	if (s)
+	    sv_setpv(sv,s);
+	else {
+	    sv_setpv(sv,GvENAME(defoutgv));
+	    sv_catpv(sv,"_TOP");
+	}
+	break;
+    case '~':
+	s = GvIO(defoutgv)->fmt_name;
+	if (!s)
+	    s = GvENAME(defoutgv);
+	sv_setpv(sv,s);
+	break;
+#ifndef lint
+    case '=':
+	sv_setiv(sv,(I32)GvIO(defoutgv)->page_len);
+	break;
+    case '-':
+	sv_setiv(sv,(I32)GvIO(defoutgv)->lines_left);
+	break;
+    case '%':
+	sv_setiv(sv,(I32)GvIO(defoutgv)->page);
+	break;
+#endif
+    case ':':
+	break;
+    case '/':
+	break;
+    case '[':
+	sv_setiv(sv,(I32)arybase);
+	break;
+    case '|':
+	if (!GvIO(defoutgv))
+	    GvIO(defoutgv) = newIO();
+	sv_setiv(sv, (GvIO(defoutgv)->flags & IOf_FLUSH) != 0 );
+	break;
+    case ',':
+	sv_setpvn(sv,ofs,ofslen);
+	break;
+    case '\\':
+	sv_setpvn(sv,ors,orslen);
+	break;
+    case '#':
+	sv_setpv(sv,ofmt);
+	break;
+    case '!':
+	sv_setnv(sv,(double)errno);
+	sv_setpv(sv, errno ? strerror(errno) : "");
+	SvNOK_on(sv);	/* what a wonderful hack! */
+	break;
+    case '<':
+	sv_setiv(sv,(I32)uid);
+	break;
+    case '>':
+	sv_setiv(sv,(I32)euid);
+	break;
+    case '(':
+	s = buf;
+	(void)sprintf(s,"%d",(int)gid);
+	goto add_groups;
+    case ')':
+	s = buf;
+	(void)sprintf(s,"%d",(int)egid);
+      add_groups:
+	while (*s) s++;
+#ifdef HAS_GETGROUPS
+#ifndef NGROUPS
+#define NGROUPS 32
+#endif
+	{
+	    GROUPSTYPE gary[NGROUPS];
+
+	    i = getgroups(NGROUPS,gary);
+	    while (--i >= 0) {
+		(void)sprintf(s," %ld", (long)gary[i]);
+		while (*s) s++;
+	    }
+	}
+#endif
+	sv_setpv(sv,buf);
+	break;
+    case '*':
+	break;
+    case '0':
+	break;
+    }
+}
+
+int
+magic_getuvar(sv, mg)
+SV *sv;
+MAGIC *mg;
+{
+    struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
+
+    if (uf && uf->uf_val)
+	(*uf->uf_val)(uf->uf_index, sv);
+    return 0;
+}
+
+int
+magic_setenv(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    register char *s;
+    I32 i;
+    s = SvPV(sv);
+    my_setenv(mg->mg_ptr,s);
+			    /* And you'll never guess what the dog had */
+			    /*   in its mouth... */
+#ifdef TAINT
+    if (s && strEQ(mg->mg_ptr,"PATH")) {
+	char *strend = SvEND(sv);
+
+	while (s < strend) {
+	    s = cpytill(tokenbuf,s,strend,':',&i);
+	    s++;
+	    if (*tokenbuf != '/'
+	      || (stat(tokenbuf,&statbuf) && (statbuf.st_mode & 2)) )
+		sv->sv_tainted = 2;
+	}
+    }
+#endif
+    return 0;
+}
+
+int
+magic_setsig(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    register char *s;
+    I32 i;
+    s = SvPV(sv);
+    i = whichsig(mg->mg_ptr);	/* ...no, a brick */
+    if (!i && (dowarn || strEQ(mg->mg_ptr,"ALARM")))
+	warn("No such signal: SIG%s", mg->mg_ptr);
+    if (strEQ(s,"IGNORE"))
+#ifndef lint
+	(void)signal(i,SIG_IGN);
+#else
+	;
+#endif
+    else if (strEQ(s,"DEFAULT") || !*s)
+	(void)signal(i,SIG_DFL);
+    else {
+	(void)signal(i,sighandler);
+	if (!index(s,'\'')) {
+	    sprintf(tokenbuf, "main'%s",s);
+	    sv_setpv(sv,tokenbuf);
+	}
+    }
+    return 0;
+}
+
+int
+magic_setdbm(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    HV* hv = (HV*)mg->mg_obj;
+    hv_dbmstore(hv,mg->mg_ptr,mg->mg_len,sv);	/* XXX slurp? */
+    return 0;
+}
+
+int
+magic_setdbline(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    OP *o;
+    I32 i;
+    GV* gv;
+    SV** svp;
+
+    gv = DBline;
+    i = SvTRUE(sv);
+    svp = av_fetch(GvAV(gv),atoi(mg->mg_ptr), FALSE);
+    if (svp && SvMAGICAL(*svp) && (o = (OP*)SvMAGIC(*svp)->mg_ptr)) {
+#ifdef NOTDEF
+	cmd->cop_flags &= ~COPf_OPTIMIZE;
+	cmd->cop_flags |= i? COPo_D1 : COPo_D0;
+#endif
+    }
+    else
+	warn("Can't break at that line\n");
+    return 0;
+}
+
+int
+magic_getarylen(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + arybase);
+    return 0;
+}
+
+int
+magic_setarylen(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    av_fill((AV*)mg->mg_obj, (SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) - arybase);
+    return 0;
+}
+
+int
+magic_getglob(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    gv_efullname(sv,((GV*)sv));/* a gv value, be nice */
+    return 0;
+}
+
+int
+magic_setglob(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    register char *s;
+    GV* gv;
+
+    if (!SvOK(sv))
+	return 0;
+    s = SvPOK(sv) ? SvPV(sv) : sv_2pv(sv);
+    if (*s == '*' && s[1])
+	s++;
+    gv = gv_fetchpv(s,TRUE);
+    if (sv == (SV*)gv)
+	return 0;
+    if (GvGP(sv))
+	gp_free(sv);
+    GvGP(sv) = gp_ref(GvGP(gv));
+    if (!GvAV(gv))
+	gv_AVadd(gv);
+    if (!GvHV(gv))
+	gv_HVadd(gv);
+    if (!GvIO(gv))
+	GvIO(gv) = newIO();
+    return 0;
+}
+
+int
+magic_setsubstr(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    char *tmps = SvPV(sv);
+    if (!tmps)
+	tmps = "";
+    sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps,SvCUR(sv));
+    return 0;
+}
+
+int
+magic_setvec(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    do_vecset(sv);	/* XXX slurp this routine */
+    return 0;
+}
+
+int
+magic_setbm(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    mg_free(sv, 'B');
+    SvVALID_off(sv);
+    return 0;
+}
+
+int
+magic_setuvar(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
+
+    if (uf && uf->uf_set)
+	(*uf->uf_set)(uf->uf_index, sv);
+    return 0;
+}
+
+int
+magic_set(sv,mg)
+SV* sv;
+MAGIC* mg;
+{
+    register char *s;
+    I32 i;
+    switch (*mg->mg_ptr) {
+    case '\004':	/* ^D */
+	debug = (SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) | 32768;
+	DEBUG_x(dump_all());
+	break;
+    case '\006':	/* ^F */
+	maxsysfd = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	break;
+    case '\t':	/* ^I */
+	if (inplace)
+	    Safefree(inplace);
+	if (SvOK(sv))
+	    inplace = savestr(SvPV(sv));
+	else
+	    inplace = Nullch;
+	break;
+    case '\020':	/* ^P */
+	i = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	if (i != perldb) {
+	    if (perldb)
+		oldlastpm = curpm;
+	    else
+		curpm = oldlastpm;
+	}
+	perldb = i;
+	break;
+    case '\024':	/* ^T */
+	basetime = (time_t)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
+	break;
+    case '\027':	/* ^W */
+	dowarn = (bool)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
+	break;
+    case '.':
+	if (localizing)
+	    save_sptr((SV**)&last_in_gv);
+	break;
+    case '^':
+	Safefree(GvIO(defoutgv)->top_name);
+	GvIO(defoutgv)->top_name = s = savestr(SvPV(sv));
+	GvIO(defoutgv)->top_gv = gv_fetchpv(s,TRUE);
+	break;
+    case '~':
+	Safefree(GvIO(defoutgv)->fmt_name);
+	GvIO(defoutgv)->fmt_name = s = savestr(SvPV(sv));
+	GvIO(defoutgv)->fmt_gv = gv_fetchpv(s,TRUE);
+	break;
+    case '=':
+	GvIO(defoutgv)->page_len = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
+	break;
+    case '-':
+	GvIO(defoutgv)->lines_left = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
+	if (GvIO(defoutgv)->lines_left < 0L)
+	    GvIO(defoutgv)->lines_left = 0L;
+	break;
+    case '%':
+	GvIO(defoutgv)->page = (long)(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
+	break;
+    case '|':
+	if (!GvIO(defoutgv))
+	    GvIO(defoutgv) = newIO();
+	GvIO(defoutgv)->flags &= ~IOf_FLUSH;
+	if ((SvIOK(sv) ? SvIV(sv) : sv_2iv(sv)) != 0) {
+	    GvIO(defoutgv)->flags |= IOf_FLUSH;
+	}
+	break;
+    case '*':
+	i = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	multiline = (i != 0);
+	break;
+    case '/':
+	if (SvPOK(sv)) {
+	    rs = SvPV(sv);
+	    rslen = SvCUR(sv);
+	    if (rspara = !rslen) {
+		rs = "\n\n";
+		rslen = 2;
+	    }
+	    rschar = rs[rslen - 1];
+	}
+	else {
+	    rschar = 0777;	/* fake a non-existent char */
+	    rslen = 1;
+	}
+	break;
+    case '\\':
+	if (ors)
+	    Safefree(ors);
+	ors = savestr(SvPV(sv));
+	orslen = SvCUR(sv);
+	break;
+    case ',':
+	if (ofs)
+	    Safefree(ofs);
+	ofs = savestr(SvPV(sv));
+	ofslen = SvCUR(sv);
+	break;
+    case '#':
+	if (ofmt)
+	    Safefree(ofmt);
+	ofmt = savestr(SvPV(sv));
+	break;
+    case '[':
+	arybase = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	break;
+    case '?':
+	statusvalue = U_S(SvIOK(sv) ? SvIV(sv) : sv_2iv(sv));
+	break;
+    case '!':
+	errno = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);		/* will anyone ever use this? */
+	break;
+    case '<':
+	uid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	if (delaymagic) {
+	    delaymagic |= DM_RUID;
+	    break;				/* don't do magic till later */
+	}
+#ifdef HAS_SETRUID
+	(void)setruid((UIDTYPE)uid);
+#else
+#ifdef HAS_SETREUID
+	(void)setreuid((UIDTYPE)uid, (UIDTYPE)-1);
+#else
+	if (uid == euid)		/* special case $< = $> */
+	    (void)setuid(uid);
+	else
+	    fatal("setruid() not implemented");
+#endif
+#endif
+	uid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	break;
+    case '>':
+	euid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	if (delaymagic) {
+	    delaymagic |= DM_EUID;
+	    break;				/* don't do magic till later */
+	}
+#ifdef HAS_SETEUID
+	(void)seteuid((UIDTYPE)euid);
+#else
+#ifdef HAS_SETREUID
+	(void)setreuid((UIDTYPE)-1, (UIDTYPE)euid);
+#else
+	if (euid == uid)		/* special case $> = $< */
+	    setuid(euid);
+	else
+	    fatal("seteuid() not implemented");
+#endif
+#endif
+	euid = (I32)geteuid();
+	break;
+    case '(':
+	gid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	if (delaymagic) {
+	    delaymagic |= DM_RGID;
+	    break;				/* don't do magic till later */
+	}
+#ifdef HAS_SETRGID
+	(void)setrgid((GIDTYPE)gid);
+#else
+#ifdef HAS_SETREGID
+	(void)setregid((GIDTYPE)gid, (GIDTYPE)-1);
+#else
+	if (gid == egid)			/* special case $( = $) */
+	    (void)setgid(gid);
+	else
+	    fatal("setrgid() not implemented");
+#endif
+#endif
+	gid = (I32)getgid();
+	break;
+    case ')':
+	egid = SvIOK(sv) ? SvIV(sv) : sv_2iv(sv);
+	if (delaymagic) {
+	    delaymagic |= DM_EGID;
+	    break;				/* don't do magic till later */
+	}
+#ifdef HAS_SETEGID
+	(void)setegid((GIDTYPE)egid);
+#else
+#ifdef HAS_SETREGID
+	(void)setregid((GIDTYPE)-1, (GIDTYPE)egid);
+#else
+	if (egid == gid)			/* special case $) = $( */
+	    (void)setgid(egid);
+	else
+	    fatal("setegid() not implemented");
+#endif
+#endif
+	egid = (I32)getegid();
+	break;
+    case ':':
+	chopset = SvPV(sv);
+	break;
+    case '0':
+	if (!origalen) {
+	    s = origargv[0];
+	    s += strlen(s);
+	    /* See if all the arguments are contiguous in memory */
+	    for (i = 1; i < origargc; i++) {
+		if (origargv[i] == s + 1)
+		    s += strlen(++s);	/* this one is ok too */
+	    }
+	    if (origenviron[0] == s + 1) {	/* can grab env area too? */
+		my_setenv("NoNeSuCh", Nullch);
+					    /* force copy of environment */
+		for (i = 0; origenviron[i]; i++)
+		    if (origenviron[i] == s + 1)
+			s += strlen(++s);
+	    }
+	    origalen = s - origargv[0];
+	}
+	s = SvPV(sv);
+	i = SvCUR(sv);
+	if (i >= origalen) {
+	    i = origalen;
+	    SvCUR_set(sv, i);
+	    *SvEND(sv) = '\0';
+	    Copy(s, origargv[0], i, char);
+	}
+	else {
+	    Copy(s, origargv[0], i, char);
+	    s = origargv[0]+i;
+	    *s++ = '\0';
+	    while (++i < origalen)
+		*s++ = ' ';
+	}
+	break;
+    }
+    return 0;
+}
+
+I32
+whichsig(sig)
+char *sig;
+{
+    register char **sigv;
+
+    for (sigv = sig_name+1; *sigv; sigv++)
+	if (strEQ(sig,*sigv))
+	    return sigv - sig_name;
+#ifdef SIGCLD
+    if (strEQ(sig,"CHLD"))
+	return SIGCLD;
+#endif
+#ifdef SIGCHLD
+    if (strEQ(sig,"CLD"))
+	return SIGCHLD;
+#endif
+    return 0;
+}
+
+static handlertype
+sighandler(sig)
+I32 sig;
+{
+    dSP;
+    GV *gv;
+    SV *sv;
+    CV *cv;
+    CONTEXT *cx;
+    AV *oldstack;
+    I32 hasargs = 1;
+    I32 items = 1;
+    I32 gimme = G_SCALAR;
+
+#ifdef OS2		/* or anybody else who requires SIG_ACK */
+    signal(sig, SIG_ACK);
+#endif
+
+    gv = gv_fetchpv(
+	SvPVnx(*hv_fetch(GvHVn(siggv),sig_name[sig],strlen(sig_name[sig]),
+	  TRUE)), TRUE);
+    cv = GvCV(gv);
+    if (!cv && *sig_name[sig] == 'C' && instr(sig_name[sig],"LD")) {
+	if (sig_name[sig][1] == 'H')
+	    gv = gv_fetchpv(SvPVnx(*hv_fetch(GvHVn(siggv),"CLD",3,TRUE)),
+	      TRUE);
+	else
+	    gv = gv_fetchpv(SvPVnx(*hv_fetch(GvHVn(siggv),"CHLD",4,TRUE)),
+	      TRUE);
+	cv = GvCV(gv);	/* gag */
+    }
+    if (!cv) {
+	if (dowarn)
+	    warn("SIG%s handler \"%s\" not defined.\n",
+		sig_name[sig], GvENAME(gv) );
+	return;
+    }
+
+    oldstack = stack;
+    SWITCHSTACK(stack, signalstack);
+
+    sv = sv_mortalcopy(&sv_undef);
+    sv_setpv(sv,sig_name[sig]);
+    PUSHs(sv);
+
+    ENTER;
+    SAVETMPS;
+
+    push_return(op);
+    push_return(0);
+    PUSHBLOCK(cx, CXt_SUB, sp);
+    PUSHSUB(cx);
+    cx->blk_sub.savearray = GvAV(defgv);
+    cx->blk_sub.argarray = av_fake(items, sp);
+    GvAV(defgv) = cx->blk_sub.argarray;
+    CvDEPTH(cv)++;
+    if (CvDEPTH(cv) >= 2) {
+	if (CvDEPTH(cv) == 100 && dowarn)
+	    warn("Deep recursion on subroutine \"%s\"",GvENAME(gv));
+    }
+    op = CvSTART(cv);
+    PUTBACK;
+    run();		/* Does the LEAVE for us. */
+
+    SWITCHSTACK(signalstack, oldstack);
+    op = pop_return();
+
+    return;
+}
+
+#ifdef OLD
+    if (sv->sv_magic && !sv->sv_rare) {
+	GV *gv = sv->sv_magic->sv_u.sv_gv;
+
+	switch (*SvPV(gv->sv_magic)) {
+	case '1': case '2': case '3': case '4':
+	case '5': case '6': case '7': case '8': case '9': case '&':
+	    if (curpm) {
+		paren = atoi(GvENAME(gv));
+	      getparen:
+		if (curpm->op_pmregexp &&
+		  paren <= curpm->op_pmregexp->nparens &&
+		  (s = curpm->op_pmregexp->startp[paren]) ) {
+		    i = curpm->op_pmregexp->endp[paren] - s;
+		    if (i >= 0)
+			return i;
+		    else
+			return 0;
+		}
+		else
+		    return 0;
+	    }
+	    break;
+	case '+':
+	    if (curpm) {
+		paren = curpm->op_pmregexp->lastparen;
+		goto getparen;
+	    }
+	    break;
+	case '`':
+	    if (curpm) {
+		if (curpm->op_pmregexp &&
+		  (s = curpm->op_pmregexp->subbeg) ) {
+		    i = curpm->op_pmregexp->startp[0] - s;
+		    if (i >= 0)
+			return i;
+		    else
+			return 0;
+		}
+		else
+		    return 0;
+	    }
+	    break;
+	case '\'':
+	    if (curpm) {
+		if (curpm->op_pmregexp &&
+		  (s = curpm->op_pmregexp->endp[0]) ) {
+		    return (STRLEN) (curpm->op_pmregexp->subend - s);
+		}
+		else
+		    return 0;
+	    }
+	    break;
+	case ',':
+	    return (STRLEN)ofslen;
+	case '\\':
+	    return (STRLEN)orslen;
+	}
+	sv = gv_str(sv);
+    }
+#endif