6437624 RFE: Add ksh93 (as /usr/bin/ksh93) and libshell.so to OS/Net

6505835 AST tools and library (libpp) required for creating l10n messages for ksh93
PSARC/2006/550 Korn Shell 93 Integration
PSARC/2006/587 /etc/ksh.kshrc for ksh93
PSARC/2007/035 ksh93 Amendments
Contributed by Roland Mainz <roland.mainz@nrubsig.org>

--HG--
rename : usr/src/lib/libcmd/common/mapfile-vers => deleted_files/usr/src/lib/libcmd/common/mapfile-vers
rename : usr/src/lib/libcmd/common/placeholder.c => deleted_files/usr/src/lib/libcmd/common/placeholder.c

1 files changed, 1465 insertions, 0 deletions

diff --git a/usr/src/lib/libshell/common/sh/init.c b/usr/src/lib/libshell/common/sh/init.c
new file mode 100644
index 0000000000..fbb6e5c6bc
--- /dev/null
+++ b/usr/src/lib/libshell/common/sh/init.c
@@ -0,0 +1,1465 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*           Copyright (c) 1982-2007 AT&T Knowledge Ventures            *
+*                      and is licensed under the                       *
+*                  Common Public License, Version 1.0                  *
+*                      by AT&T Knowledge Ventures                      *
+*                                                                      *
+*                A copy of the License is available at                 *
+*            http://www.opensource.org/licenses/cpl1.0.txt             *
+*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                  David Korn <dgk@research.att.com>                   *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+/*
+ *
+ * Shell initialization
+ *
+ *   David Korn
+ *   AT&T Labs
+ *
+ */
+
+#include        "defs.h"
+#include        <stak.h>
+#include        <ctype.h>
+#include        <ccode.h>
+#include        <pwd.h>
+#include        "variables.h"
+#include        "path.h"
+#include        "fault.h"
+#include        "name.h"
+#include	"edit.h"
+#include	"jobs.h"
+#include	"io.h"
+#include	"shlex.h"
+#include	"builtins.h"
+#include	"FEATURE/time"
+#include	"FEATURE/dynamic"
+#include	"lexstates.h"
+#include	"version.h"
+
+#if SHOPT_MULTIBYTE
+    char e_version[]	= "\n@(#)$Id: Version M "SH_RELEASE" $\0\n";
+#else
+    char e_version[]	= "\n@(#)$Id: Version "SH_RELEASE" $\0\n";
+#endif /* SHOPT_MULTIBYTE */
+
+#if SHOPT_BASH
+    extern void bash_init(int);
+#endif
+
+#define RANDMASK	0x7fff
+#ifndef CLK_TCK
+#   define CLK_TCK	60
+#endif /* CLK_TCK */
+
+#ifndef environ
+    extern char	**environ;
+#endif
+
+#undef	getconf
+#define getconf(x)	strtol(astconf(x,NiL,NiL),NiL,0)
+
+struct seconds
+{
+	Namfun_t	hdr;
+	Shell_t		*sh;
+};
+
+struct rand
+{
+	Namfun_t	hdr;
+	Shell_t		*sh;
+	int32_t		rand_last;
+};
+
+struct ifs
+{
+	Namfun_t	hdr;
+	Shell_t		*sh;
+	Namval_t	*ifsnp;
+};
+
+struct shell
+{
+	Namfun_t	hdr;
+	Shell_t		*sh;
+};
+
+struct match
+{
+	Namfun_t	hdr;
+	char		*val;
+	char		*rval;
+	int		vsize;
+	int		nmatch;
+	int		lastsub;
+	int		match[2*(MATCH_MAX+1)];
+};
+
+typedef struct _init_
+{
+	Shell_t		*sh;
+#if SHOPT_FS_3D
+	Namfun_t	VPATH_init;
+#endif /* SHOPT_FS_3D */
+	struct ifs	IFS_init;
+	struct shell	PATH_init;
+#ifdef PATH_BFPATH
+	struct shell	FPATH_init;
+	struct shell	CDPATH_init;
+#endif
+	struct shell	SHELL_init;
+	struct shell	ENV_init;
+	struct shell	VISUAL_init;
+	struct shell	EDITOR_init;
+	struct shell	OPTINDEX_init;
+	struct seconds	SECONDS_init;
+	struct rand	RAND_init;
+	struct shell	LINENO_init;
+	struct shell	L_ARG_init;
+	struct match	SH_MATCH_init;
+#ifdef _hdr_locale
+	struct shell	LC_TYPE_init;
+	struct shell	LC_NUM_init;
+	struct shell	LC_COLL_init;
+	struct shell	LC_MSG_init;
+	struct shell	LC_ALL_init;
+	struct shell	LANG_init;
+#endif /* _hdr_locale */
+} Init_t;
+
+static void		env_init(Shell_t*);
+static Init_t		*nv_init(Shell_t*);
+static Dt_t		*inittree(Shell_t*,const struct shtable2*);
+
+#ifdef _WINIX
+#   define EXE	"?(.exe)"
+#else
+#   define EXE
+#endif
+
+static int		rand_shift;
+
+
+/*
+ * Invalidate all path name bindings
+ */
+static void rehash(register Namval_t *np,void *data)
+{
+	NOT_USED(data);
+	nv_onattr(np,NV_NOALIAS);
+}
+
+/*
+ * out of memory routine for stak routines
+ */
+static char *nospace(int unused)
+{
+	NOT_USED(unused);
+	errormsg(SH_DICT,ERROR_exit(3),e_nospace);
+	return(NIL(char*));
+}
+
+/* Trap for VISUAL and EDITOR variables */
+static void put_ed(register Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	register const char *cp, *name=nv_name(np);
+	if(*name=='E' && nv_getval(nv_scoped(VISINOD)))
+		goto done;
+	sh_offoption(SH_VI);
+	sh_offoption(SH_EMACS);
+	sh_offoption(SH_GMACS);
+	if(!(cp=val) && (*name=='E' || !(cp=nv_getval(nv_scoped(EDITNOD)))))
+		goto done;
+	/* turn on vi or emacs option if editor name is either*/
+	cp = path_basename(cp);
+	if(strmatch(cp,"*[Vv][Ii]*"))
+		sh_onoption(SH_VI);
+	else if(strmatch(cp,"*gmacs*"))
+		sh_onoption(SH_GMACS);
+	else if(strmatch(cp,"*macs*"))
+		sh_onoption(SH_EMACS);
+done:
+	nv_putv(np, val, flags, fp);
+}
+
+/* Trap for OPTINDEX */
+static void put_optindex(Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	Shell_t *shp = ((struct shell*)fp)->sh;
+	shp->st.opterror = shp->st.optchar = 0;
+	nv_putv(np, val, flags, fp);
+}
+
+static Sfdouble_t nget_optindex(register Namval_t* np, Namfun_t *fp)
+{
+	return((Sfdouble_t)*np->nvalue.lp);
+}
+
+/* Trap for restricted variables FPATH, PATH, SHELL, ENV */
+static void put_restricted(register Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	Shell_t *shp = ((struct shell*)fp)->sh;
+	int		path_scoped = 0;
+#ifdef PATH_BFPATH
+	Pathcomp_t *pp;
+	char *name = nv_name(np);
+#endif
+	if(!(flags&NV_RDONLY) && sh_isoption(SH_RESTRICTED))
+		errormsg(SH_DICT,ERROR_exit(1),e_restricted,nv_name(np));
+	if(np==PATHNOD	|| (path_scoped=(strcmp(name,PATHNOD->nvname)==0)))		
+	{
+#ifndef PATH_BFPATH
+		shp->lastpath = 0;
+#endif
+		nv_scan(shp->track_tree,rehash,(void*)0,NV_TAGGED,NV_TAGGED);
+		if(path_scoped && !val)
+			val = PATHNOD->nvalue.cp;
+	}
+	if(val && !(flags&NV_RDONLY) && np->nvalue.cp && strcmp(val,np->nvalue.cp)==0)
+		 return;
+#ifdef PATH_BFPATH
+	if(shp->pathlist  && np==FPATHNOD)
+		shp->pathlist = (void*)path_unsetfpath((Pathcomp_t*)shp->pathlist);
+#endif
+	nv_putv(np, val, flags, fp);
+#ifdef PATH_BFPATH
+	if(shp->pathlist)
+	{
+		val = np->nvalue.cp;
+		if(np==PATHNOD || path_scoped)
+			pp = (void*)path_addpath((Pathcomp_t*)shp->pathlist,val,PATH_PATH);
+		else if(val && np==FPATHNOD)
+			pp = (void*)path_addpath((Pathcomp_t*)shp->pathlist,val,PATH_FPATH);
+		else
+			return;
+		if(shp->pathlist = (void*)pp)
+			pp->shp = shp;
+		if(!val && (flags&NV_NOSCOPE))
+		{
+			Namval_t *mp = dtsearch(shp->var_tree,np);
+			if(mp && (val=nv_getval(mp)))
+				nv_putval(mp,val,NV_RDONLY);
+		}
+#if 0
+sfprintf(sfstderr,"%d: name=%s val=%s\n",getpid(),name,val);
+path_dump((Pathcomp_t*)shp->pathlist);
+#endif
+	}
+#endif
+}
+
+#ifdef PATH_BFPATH
+static void put_cdpath(register Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	Pathcomp_t *pp;
+	Shell_t *shp = ((struct shell*)fp)->sh;
+	nv_putv(np, val, flags, fp);
+	if(!shp->cdpathlist)
+		return;
+	val = np->nvalue.cp;
+	pp = (void*)path_addpath((Pathcomp_t*)shp->cdpathlist,val,PATH_CDPATH);
+	if(shp->cdpathlist = (void*)pp)
+		pp->shp = shp;
+}
+#endif
+
+#ifdef _hdr_locale
+    /*
+     * This function needs to be modified to handle international
+     * error message translations
+     */
+#if ERROR_VERSION >= 20000101L
+    static char* msg_translate(const char* catalog, const char* message)
+    {
+	NOT_USED(catalog);
+	return((char*)message);
+    }
+#else
+    static char* msg_translate(const char* message, int type)
+    {
+	NOT_USED(type);
+	return((char*)message);
+    }
+#endif
+
+    /* Trap for LC_ALL, LC_TYPE, LC_MESSAGES, LC_COLLATE and LANG */
+    static void put_lang(Namval_t* np,const char *val,int flags,Namfun_t *fp)
+    {
+	int type;
+	char *lc_all = nv_getval(LCALLNOD);
+	char *name = nv_name(np);
+	if(name==(LCALLNOD)->nvname)
+		type = LC_ALL;
+	else if(name==(LCTYPENOD)->nvname)
+		type = LC_CTYPE;
+	else if(name==(LCMSGNOD)->nvname)
+		type = LC_MESSAGES;
+	else if(name==(LCCOLLNOD)->nvname)
+		type = LC_COLLATE;
+	else if(name==(LCNUMNOD)->nvname)
+		type = LC_NUMERIC;
+	else if(name==(LANGNOD)->nvname && (!lc_all || *lc_all==0))
+		type = LC_ALL;
+	else
+		type= -1;
+	if(sh_isstate(SH_INIT) && type>=0 && type!=LC_ALL && lc_all && *lc_all)
+		type= -1;
+	if(type>=0)
+	{
+		if(!setlocale(type,val?val:""))
+		{
+			if(!sh_isstate(SH_INIT) || sh.login_sh==0)
+				errormsg(SH_DICT,0,e_badlocale,val);
+			return;
+		}
+	}
+	if(CC_NATIVE==CC_ASCII && (type==LC_ALL || type==LC_CTYPE))
+	{
+		if(sh_lexstates[ST_BEGIN]!=sh_lexrstates[ST_BEGIN])
+			free((void*)sh_lexstates[ST_BEGIN]);
+		if(ast.locale.set&(1<<AST_LC_CTYPE))
+		{
+			register int c;
+			char *state[4];
+			sh_lexstates[ST_BEGIN] = state[0] = (char*)malloc(4*(1<<CHAR_BIT));
+			memcpy(state[0],sh_lexrstates[ST_BEGIN],(1<<CHAR_BIT));
+			sh_lexstates[ST_NAME] = state[1] = state[0] + (1<<CHAR_BIT);
+			memcpy(state[1],sh_lexrstates[ST_NAME],(1<<CHAR_BIT));
+			sh_lexstates[ST_DOL] = state[2] = state[1] + (1<<CHAR_BIT);
+			memcpy(state[2],sh_lexrstates[ST_DOL],(1<<CHAR_BIT));
+			sh_lexstates[ST_BRACE] = state[3] = state[2] + (1<<CHAR_BIT);
+			memcpy(state[3],sh_lexrstates[ST_BRACE],(1<<CHAR_BIT));
+			for(c=0; c<(1<<CHAR_BIT); c++)
+			{
+				if(state[0][c]!=S_REG)
+					continue;
+				if(state[2][c]!=S_ERR)
+					continue;
+				if(isblank(c))
+				{
+					state[0][c]=0;
+					state[1][c]=S_BREAK;
+					state[2][c]=S_BREAK;
+					continue;
+				}
+				if(!isalpha(c))
+					continue;
+				state[0][c]=S_NAME;
+				if(state[1][c]==S_REG)
+					state[1][c]=0;
+				state[2][c]=S_ALP;
+				if(state[3][c]==S_ERR)
+					state[3][c]=0;
+			}
+		}
+		else
+		{
+			sh_lexstates[ST_BEGIN]=(char*)sh_lexrstates[ST_BEGIN];
+			sh_lexstates[ST_NAME]=(char*)sh_lexrstates[ST_NAME];
+			sh_lexstates[ST_DOL]=(char*)sh_lexrstates[ST_DOL];
+			sh_lexstates[ST_BRACE]=(char*)sh_lexrstates[ST_BRACE];
+		}
+	}
+#if ERROR_VERSION < 20000101L
+	if(type==LC_ALL || type==LC_MESSAGES)
+		error_info.translate = msg_translate;
+#endif
+	nv_putv(np, val, flags, fp);
+    }
+#endif /* _hdr_locale */
+
+/* Trap for IFS assignment and invalidates state table */
+static void put_ifs(register Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	register struct ifs *ip = (struct ifs*)fp;
+	ip->ifsnp = 0;
+	if(val != np->nvalue.cp)
+		nv_putv(np, val, flags, fp);
+	
+}
+
+/*
+ * This is the lookup function for IFS
+ * It keeps the sh.ifstable up to date
+ */
+static char* get_ifs(register Namval_t* np, Namfun_t *fp)
+{
+	register struct ifs *ip = (struct ifs*)fp;
+	register char *cp, *value;
+	register int c,n;
+	register Shell_t *shp = ip->sh;
+	value = nv_getv(np,fp);
+	if(np!=ip->ifsnp)
+	{
+		ip->ifsnp = np;
+		memset(shp->ifstable,0,(1<<CHAR_BIT));
+		if(cp=value)
+		{
+#if SHOPT_MULTIBYTE
+			while(n=mbsize(cp),c= *(unsigned char*)cp)
+#else
+			while(c= *(unsigned char*)cp++)
+#endif /* SHOPT_MULTIBYTE */
+			{
+#if SHOPT_MULTIBYTE
+				cp++;
+				if(n>1)
+				{
+					cp += (n-1);
+					shp->ifstable[c] = S_MBYTE;
+					continue;
+				}
+#endif /* SHOPT_MULTIBYTE */
+				n = S_DELIM;
+				if(c== *cp)
+					cp++;
+				else if(c=='\n')
+					n = S_NL;
+				else if(isspace(c))
+					n = S_SPACE;
+				shp->ifstable[c] = n;
+			}
+		}
+		else
+		{
+			shp->ifstable[' '] = shp->ifstable['\t'] = S_SPACE;
+			shp->ifstable['\n'] = S_NL;
+		}
+	}
+	return(value);
+}
+
+/*
+ * these functions are used to get and set the SECONDS variable
+ */
+#ifdef timeofday
+#   define dtime(tp) ((double)((tp)->tv_sec)+1e-6*((double)((tp)->tv_usec)))
+#   define tms	timeval
+#else
+#   define dtime(tp)	(((double)times(tp))/sh.lim.clk_tck)
+#   define timeofday(a)
+#endif
+
+static void put_seconds(register Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	double d;
+	struct tms tp;
+	if(!val)
+	{
+		nv_stack(np, NIL(Namfun_t*));
+		nv_unset(np);
+		return;
+	}
+	if(!np->nvalue.dp)
+	{
+		nv_setsize(np,3);
+		np->nvalue.dp = new_of(double,0);
+	}
+	nv_putv(np, val, flags, fp);
+	d = *np->nvalue.dp;
+	timeofday(&tp);
+	*np->nvalue.dp = dtime(&tp)-d;
+}
+
+static char* get_seconds(register Namval_t* np, Namfun_t *fp)
+{
+	register int places = nv_size(np);
+	struct tms tp;
+	double d, offset = (np->nvalue.dp?*np->nvalue.dp:0);
+	NOT_USED(fp);
+	timeofday(&tp);
+	d = dtime(&tp)- offset;
+	sfprintf(sh.strbuf,"%.*f",places,d);
+	return(sfstruse(sh.strbuf));
+}
+
+static Sfdouble_t nget_seconds(register Namval_t* np, Namfun_t *fp)
+{
+	struct tms tp;
+	double offset = (np->nvalue.dp?*np->nvalue.dp:0);
+	NOT_USED(fp);
+	timeofday(&tp);
+	return(dtime(&tp)- offset);
+}
+
+/*
+ * These three functions are used to get and set the RANDOM variable
+ */
+static void put_rand(register Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	struct rand *rp = (struct rand*)fp;
+	register long n;
+	if(!val)
+	{
+		nv_stack(np, NIL(Namfun_t*));
+		nv_unset(np);
+		return;
+	}
+	if(flags&NV_INTEGER)
+		n = *(double*)val;
+	else
+		n = sh_arith(val);
+	srand((int)(n&RANDMASK));
+	rp->rand_last = -1;
+	if(!np->nvalue.lp)
+		np->nvalue.lp = &rp->rand_last;
+}
+
+/*
+ * get random number in range of 0 - 2**15
+ * never pick same number twice in a row
+ */
+static Sfdouble_t nget_rand(register Namval_t* np, Namfun_t *fp)
+{
+	register long cur, last= *np->nvalue.lp;
+	NOT_USED(fp);
+	do
+		cur = (rand()>>rand_shift)&RANDMASK;
+	while(cur==last);
+	*np->nvalue.lp = cur;
+	return((Sfdouble_t)cur);
+}
+
+static char* get_rand(register Namval_t* np, Namfun_t *fp)
+{
+	register long n = nget_rand(np,fp);
+	return(fmtbase(n, 10, 0));
+}
+
+/*
+ * These three routines are for LINENO
+ */
+static Sfdouble_t nget_lineno(Namval_t* np, Namfun_t *fp)
+{
+	double d=1;
+	if(error_info.line >0)
+		d = error_info.line;
+	else if(error_info.context && error_info.context->line>0)
+		d = error_info.context->line;
+	NOT_USED(np);
+	NOT_USED(fp);
+	return(d);
+}
+
+static void put_lineno(Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	register long n;
+	Shell_t *shp = ((struct shell*)fp)->sh;
+	if(!val)
+	{
+		nv_stack(np, NIL(Namfun_t*));
+		nv_unset(np);
+		return;
+	}
+	if(flags&NV_INTEGER)
+		n = *(double*)val;
+	else
+		n = sh_arith(val);
+	shp->st.firstline += nget_lineno(np,fp)+1-n;
+}
+
+static char* get_lineno(register Namval_t* np, Namfun_t *fp)
+{
+	register long n = nget_lineno(np,fp);
+	return(fmtbase(n, 10, 0));
+}
+
+static char* get_lastarg(Namval_t* np, Namfun_t *fp)
+{
+	NOT_USED(np);
+	return(sh.lastarg);
+}
+
+static void put_lastarg(Namval_t* np,const char *val,int flags,Namfun_t *fp)
+{
+	if(flags&NV_INTEGER)
+	{
+		sfprintf(sh.strbuf,"%.*g",12,*((double*)val));
+		val = sfstruse(sh.strbuf);
+	}
+	if(sh.lastarg && !nv_isattr(np,NV_NOFREE))
+		free((void*)sh.lastarg);
+	else
+		nv_offattr(np,NV_NOFREE);
+	if(val)
+		sh.lastarg = strdup(val);
+	else
+		sh.lastarg = 0;
+}
+
+static int hasgetdisc(register Namfun_t *fp)
+{
+        while(fp && !fp->disc->getnum && !fp->disc->getval)
+                fp = fp->next;
+	return(fp!=0);
+}
+
+/*
+ * store the most recent value for use in .sh.match
+ */
+void sh_setmatch(const char *v, int vsize, int nmatch, int match[])
+{
+	struct match *mp = (struct match*)(SH_MATCHNOD->nvfun);
+	register int i,n;
+	if(mp->nmatch = nmatch)
+	{
+		memcpy(mp->match,match,nmatch*2*sizeof(match[0]));
+		for(n=match[0],i=1; i < 2*nmatch; i++)
+		{
+			if(mp->match[i] < n)
+				n = mp->match[i];
+		}
+		for(vsize=0,i=0; i < 2*nmatch; i++)
+		{
+			if((mp->match[i] -= n) > vsize)
+				vsize = mp->match[i];
+		}
+		v += n;
+		if(vsize >= mp->vsize)
+		{
+			if(mp->vsize)
+				mp->val = (char*)realloc(mp->val,vsize+1);
+			else
+				mp->val = (char*)malloc(vsize+1);
+			mp->vsize = vsize;
+		}
+		memcpy(mp->val,v,vsize);
+		mp->val[vsize] = 0;
+		nv_putsub(SH_MATCHNOD, NIL(char*), nmatch|ARRAY_FILL);
+		mp->lastsub = -1;
+	}
+} 
+
+#define array_scan(np)	((nv_arrayptr(np)->nelem&ARRAY_SCAN))
+
+static char* get_match(register Namval_t* np, Namfun_t *fp)
+{
+	struct match *mp = (struct match*)fp;
+	int sub,n;
+	char *val;
+	sub = nv_aindex(np);
+	if(sub>=mp->nmatch)
+		return(0);
+	if(sub==mp->lastsub)
+		return(mp->rval);
+	if(mp->rval)
+	{
+		free((void*)mp->rval);
+		mp->rval = 0;
+	}
+	n = mp->match[2*sub+1]-mp->match[2*sub];
+	if(n<=0)
+		return("");
+	val = mp->val+mp->match[2*sub];
+	if(mp->val[mp->match[2*sub+1]]==0)
+		return(val);
+	mp->rval = (char*)malloc(n+1);
+	mp->lastsub = sub;
+	memcpy(mp->rval,val,n);
+	mp->rval[n] = 0;
+	return(mp->rval);
+}
+
+static const Namdisc_t SH_MATCH_disc  = {  sizeof(struct match), 0, get_match };
+
+#if SHOPT_FS_3D
+    /*
+     * set or unset the mappings given a colon separated list of directories
+     */
+    static void vpath_set(char *str, int mode)
+    {
+	register char *lastp, *oldp=str, *newp=strchr(oldp,':');
+	if(!sh.lim.fs3d)
+		return;
+	while(newp)
+	{
+		*newp++ = 0;
+		if(lastp=strchr(newp,':'))
+			*lastp = 0;
+		mount((mode?newp:""),oldp,FS3D_VIEW,0);
+		newp[-1] = ':';
+		oldp = newp;
+		newp=lastp;
+	}
+    }
+
+    /* catch vpath assignments */
+    static void put_vpath(register Namval_t* np,const char *val,int flags,Namfun_t *fp)
+    {
+	register char *cp;
+	if(cp = nv_getval(np))
+		vpath_set(cp,0);
+	if(val)
+		vpath_set((char*)val,1);
+	nv_putv(np,val,flags,fp);
+    }
+    static const Namdisc_t VPATH_disc	= { 0, put_vpath  };
+    static Namfun_t VPATH_init	= { &VPATH_disc, 1  };
+#endif /* SHOPT_FS_3D */
+
+
+static const Namdisc_t IFS_disc		= {  sizeof(struct ifs), put_ifs, get_ifs };
+const Namdisc_t RESTRICTED_disc	= {  sizeof(struct shell), put_restricted };
+#ifdef PATH_BFPATH
+static const Namdisc_t CDPATH_disc	= {  sizeof(struct shell), put_cdpath }; 
+#endif
+static const Namdisc_t EDITOR_disc	= {  sizeof(struct shell), put_ed };
+static const Namdisc_t OPTINDEX_disc	= {  sizeof(struct shell), put_optindex, 0, nget_optindex };
+static const Namdisc_t SECONDS_disc	= {  sizeof(struct seconds), put_seconds, get_seconds, nget_seconds };
+static const Namdisc_t RAND_disc	= {  sizeof(struct rand), put_rand, get_rand, nget_rand };
+static const Namdisc_t LINENO_disc	= {  sizeof(struct shell), put_lineno, get_lineno, nget_lineno };
+static const Namdisc_t L_ARG_disc	= {  sizeof(struct shell), put_lastarg, get_lastarg };
+
+#if SHOPT_NAMESPACE
+    static char* get_nspace(Namval_t* np, Namfun_t *fp)
+    {
+	if(sh.namespace)
+		return(nv_name(sh.namespace));
+	return((char*)np->nvalue.cp);
+    }
+    static const Namdisc_t NSPACE_disc	= {  0, 0, get_nspace };
+    static Namfun_t NSPACE_init	= {  &NSPACE_disc, 1};
+#endif /* SHOPT_NAMESPACE */
+
+#ifdef _hdr_locale
+    static const Namdisc_t LC_disc	= {  sizeof(struct shell), put_lang };
+#endif /* _hdr_locale */
+
+/*
+ * This function will get called whenever a configuration parameter changes
+ */
+static int newconf(const char *name, const char *path, const char *value)
+{
+	register char *arg;
+	if(!name)
+		setenviron(value);
+	else if(strcmp(name,"UNIVERSE")==0 && strcmp(astconf(name,0,0),value))
+	{
+		sh.universe = 0;
+		/* set directory in new universe */
+		if(*(arg = path_pwd(0))=='/')
+			chdir(arg);
+		/* clear out old tracked alias */
+		stakseek(0);
+		stakputs(nv_getval(PATHNOD));
+		stakputc(0);
+		nv_putval(PATHNOD,stakseek(0),NV_RDONLY);
+	}
+	return(1);
+}
+
+#if	(CC_NATIVE != CC_ASCII)
+    static void a2e(char *d, const char *s)
+    {
+	register const unsigned char *t;
+	register int i;
+	t = CCMAP(CC_ASCII, CC_NATIVE);
+	for(i=0; i<(1<<CHAR_BIT); i++)
+		d[t[i]] = s[i];
+    }
+
+    static void init_ebcdic(void)
+    {
+	int i;
+	char *cp = (char*)malloc(ST_NONE*(1<<CHAR_BIT));
+	for(i=0; i < ST_NONE; i++)
+	{
+		a2e(cp,sh_lexrstates[i]);
+		sh_lexstates[i] = cp;
+		cp += (1<<CHAR_BIT);
+	}
+    }
+#endif
+
+/*
+ * return SH_TYPE_* bitmask for path
+ * 0 for "not a shell"
+ */
+int sh_type(register const char *path)
+{
+	register const char*	s;
+	register int		t = 0;
+	
+	if (s = (const char*)strrchr(path, '/'))
+	{
+		if (*path == '-')
+			t |= SH_TYPE_LOGIN;
+		s++;
+	}
+	else
+		s = path;
+	if (*s == '-')
+	{
+		s++;
+		t |= SH_TYPE_LOGIN;
+	}
+	for (;;)
+	{
+		if (!(t & (SH_TYPE_KSH|SH_TYPE_BASH)))
+		{
+			if (*s == 'k')
+			{
+				s++;
+				t |= SH_TYPE_KSH;
+				continue;
+			}
+#if SHOPT_BASH
+			if (*s == 'b' && *(s+1) == 'a')
+			{
+				s += 2;
+				t |= SH_TYPE_BASH;
+				continue;
+			}
+#endif
+		}
+		if (!(t & (SH_TYPE_PROFILE|SH_TYPE_RESTRICTED)))
+		{
+#if SHOPT_PFSH
+			if (*s == 'p' && *(s+1) == 'f')
+			{
+				s += 2;
+				t |= SH_TYPE_PROFILE;
+				continue;
+			}
+#endif
+			if (*s == 'r')
+			{
+				s++;
+				t |= SH_TYPE_RESTRICTED;
+				continue;
+			}
+		}
+		break;
+	}
+	if (*s++ != 's' || *s++ != 'h')
+		return 0;
+	t |= SH_TYPE_SH;
+	if ((t & SH_TYPE_KSH) && *s == '9' && *(s+1) == '3')
+		s += 2;
+#if _WINIX
+	if (*s == '.' && *(s+1) == 'e' && *(s+2) == 'x' && *(s+3) == 'e')
+		s += 4;
+#endif
+	if (*s)
+		t &= ~(SH_TYPE_PROFILE|SH_TYPE_RESTRICTED);
+	return t;
+}
+
+/*
+ * initialize the shell
+ */
+Shell_t *sh_init(register int argc,register char *argv[], void(*userinit)(int))
+{
+	register int n;
+	int type;
+	static char *login_files[3];
+	n = strlen(e_version);
+	if(e_version[n-1]=='$' && e_version[n-2]==' ')
+		e_version[n-2]=0;
+#if	(CC_NATIVE == CC_ASCII)
+	memcpy(sh_lexstates,sh_lexrstates,ST_NONE*sizeof(char*));
+#else
+	init_ebcdic();
+#endif
+	umask(umask(0));
+	sh.mac_context = sh_macopen(&sh);
+	sh.arg_context = sh_argopen(&sh);
+	sh.lex_context = (void*)sh_lexopen(0,&sh,1);
+	sh.ed_context = (void*)ed_open(&sh);
+	sh.strbuf = sfstropen();
+	sfsetbuf(sh.strbuf,(char*)0,64);
+	sh_onstate(SH_INIT);
+	error_info.exit = sh_exit;
+	error_info.id = path_basename(argv[0]);
+#if ERROR_VERSION >= 20000102L
+	error_info.catalog = e_dict;
+#endif
+	sh.cpipe[0] = -1;
+	sh.coutpipe = -1;
+	sh.userid=getuid();
+	sh.euserid=geteuid();
+	sh.groupid=getgid();
+	sh.egroupid=getegid();
+	for(n=0;n < 10; n++)
+	{
+		/* don't use lower bits when rand() generates large numbers */
+		if(rand() > RANDMASK)
+		{
+			rand_shift = 3;
+			break;
+		}
+	}
+	sh.lim.clk_tck = getconf("CLK_TCK");
+	sh.lim.arg_max = getconf("ARG_MAX");
+	sh.lim.open_max = getconf("OPEN_MAX");
+	sh.lim.child_max = getconf("CHILD_MAX");
+	sh.lim.ngroups_max = getconf("NGROUPS_MAX");
+	sh.lim.posix_version = getconf("VERSION");
+	sh.lim.posix_jobcontrol = getconf("JOB_CONTROL");
+	if(sh.lim.arg_max <=0)
+		sh.lim.arg_max = ARG_MAX;
+	if(sh.lim.child_max <=0)
+		sh.lim.child_max = CHILD_MAX;
+	if(sh.lim.open_max <0)
+		sh.lim.open_max = OPEN_MAX;
+	if(sh.lim.open_max > (SHRT_MAX-2))
+		sh.lim.open_max = SHRT_MAX-2;
+	if(sh.lim.clk_tck <=0)
+		sh.lim.clk_tck = CLK_TCK;
+#if SHOPT_FS_3D
+	if(fs3d(FS3D_TEST))
+		sh.lim.fs3d = 1;
+#endif /* SHOPT_FS_3D */
+	sh_ioinit();
+	/* initialize signal handling */
+	sh_siginit();
+	stakinstall(NIL(Stak_t*),nospace);
+	/* set up memory for name-value pairs */
+	sh.init_context =  nv_init(&sh);
+	/* read the environment */
+	if(argc>0)
+	{
+		type = sh_type(*argv);
+		if(type&SH_TYPE_LOGIN)
+			sh.login_sh = 2;
+	}
+	env_init(&sh);
+#if SHOPT_SPAWN
+	{
+		/*
+		 * try to find the pathname for this interpreter
+		 * try using environment variable _ or argv[0]
+		 */
+		char *last, *cp=nv_getval(L_ARGNOD);
+		char buff[PATH_MAX+1];
+		sh.shpath = 0;
+		sfprintf(sh.strbuf,"/proc/%d/exe",getpid());
+		if((n=readlink(sfstruse(sh.strbuf),buff,sizeof(buff)-1))>0)
+		{
+			buff[n] = 0;
+			sh.shpath = strdup(buff);
+		}
+		else if((cp && (sh_type(cp)&SH_TYPE_SH)) || (argc>0 && strchr(cp= *argv,'/')))
+		{
+			if(*cp=='/')
+				sh.shpath = strdup(cp);
+			else if(cp = nv_getval(PWDNOD))
+			{
+				int offset = staktell();
+				stakputs(cp);
+				stakputc('/');
+				stakputs(argv[0]);
+				pathcanon(stakptr(offset),PATH_DOTDOT);
+				sh.shpath = strdup(stakptr(offset));
+				stakseek(offset);
+			}
+		}
+	}
+#endif
+	nv_putval(IFSNOD,(char*)e_sptbnl,NV_RDONLY);
+#if SHOPT_FS_3D
+	nv_stack(VPATHNOD, &VPATH_init);
+#endif /* SHOPT_FS_3D */
+	astconfdisc(newconf);
+#if SHOPT_TIMEOUT
+	sh.st.tmout = SHOPT_TIMEOUT;
+#endif /* SHOPT_TIMEOUT */
+	/* initialize jobs table */
+	job_clear();
+	if(argc>0)
+	{
+		/* check for restricted shell */
+		if(type&SH_TYPE_RESTRICTED)
+			sh_onoption(SH_RESTRICTED);
+#if SHOPT_PFSH
+		/* check for profile shell */
+		else if(type&SH_TYPE_PROFILE)
+			sh_onoption(SH_PFSH);
+#endif
+#if SHOPT_BASH
+		/* check for invocation as bash */
+		if(type&SH_TYPE_BASH)
+		{
+		        sh.userinit = userinit = bash_init;
+			sh_onoption(SH_BASH);
+			sh_onstate(SH_PREINIT);
+			(*userinit)(0);
+			sh_offstate(SH_PREINIT);
+		}
+#endif
+		/* look for options */
+		/* sh.st.dolc is $#	*/
+		if((sh.st.dolc = sh_argopts(-argc,argv)) < 0)
+		{
+			sh.exitval = 2;
+			sh_done(0);
+		}
+		opt_info.disc = 0;
+		sh.st.dolv=argv+(argc-1)-sh.st.dolc;
+		sh.st.dolv[0] = argv[0];
+		if(sh.st.dolc < 1)
+			sh_onoption(SH_SFLAG);
+		if(!sh_isoption(SH_SFLAG))
+		{
+			sh.st.dolc--;
+			sh.st.dolv++;
+#if _WINIX
+			{
+				char*	name;
+				name = sh.st.dolv[0];
+				if(name[1]==':' && (name[2]=='/' || name[2]=='\\'))
+				{
+#if _lib_pathposix
+					char*	p;
+
+					if((n = pathposix(name, NIL(char*), 0)) > 0 && (p = (char*)malloc(++n)))
+					{
+						pathposix(name, p, n);
+						name = p;
+					}
+					else
+#endif
+					{
+						name[1] = name[0];
+						name[0] = name[2] = '/';
+					}
+				}
+			}
+#endif /* _WINIX */
+		}
+	}
+#if SHOPT_PFSH
+	if (sh_isoption(SH_PFSH))
+	{
+		struct passwd *pw = getpwuid(sh.userid);
+		if(pw)
+			sh.user = strdup(pw->pw_name);
+		
+	}
+#endif
+	/* set[ug]id scripts require the -p flag */
+	if(sh.userid!=sh.euserid || sh.groupid!=sh.egroupid)
+	{
+#if SHOPT_P_SUID
+		/* require sh -p to run setuid and/or setgid */
+		if(!sh_isoption(SH_PRIVILEGED) && sh.euserid < SHOPT_P_SUID)
+		{
+			setuid(sh.euserid=sh.userid);
+			setgid(sh.egroupid=sh.groupid);
+		}
+		else
+#else
+			sh_onoption(SH_PRIVILEGED);
+#endif /* SHOPT_P_SUID */
+#ifdef SHELLMAGIC
+		/* careful of #! setuid scripts with name beginning with - */
+		if(sh.login_sh && argv[1] && strcmp(argv[0],argv[1])==0)
+			errormsg(SH_DICT,ERROR_exit(1),e_prohibited);
+#endif /*SHELLMAGIC*/
+	}
+	else
+		sh_offoption(SH_PRIVILEGED);
+	/* shname for $0 in profiles and . scripts */
+	if(strmatch(argv[1],e_devfdNN))
+		sh.shname = strdup(argv[0]);
+	else
+		sh.shname = strdup(sh.st.dolv[0]);
+	/*
+	 * return here for shell script execution
+	 * but not for parenthesis subshells
+	 */
+	error_info.id = strdup(sh.st.dolv[0]); /* error_info.id is $0 */
+	sh.jmpbuffer = (void*)&sh.checkbase;
+	sh_pushcontext(&sh.checkbase,SH_JMPSCRIPT);
+	sh.st.self = &sh.global;
+        sh.topscope = (Shscope_t*)sh.st.self;
+	sh_offstate(SH_INIT);
+	login_files[0] = (char*)e_profile;
+	login_files[1] = ".profile";
+	sh.login_files = login_files;
+	if(sh.userinit=userinit)
+		(*userinit)(0);
+	return(&sh);
+}
+
+Shell_t *sh_getinterp(void)
+{
+	return(&sh);
+}
+
+/*
+ * reinitialize before executing a script
+ */
+int sh_reinit(char *argv[])
+{
+	Shopt_t opt;
+	dtclear(sh.fun_tree);
+	dtclose(sh.alias_tree);
+	sh.alias_tree = inittree(&sh,shtab_aliases);
+	sh.namespace = 0;
+	sh.inuse_bits = 0;
+	if(sh.userinit)
+		(*sh.userinit)(1);
+	if(sh.heredocs)
+	{
+		sfclose(sh.heredocs);
+		sh.heredocs = 0;
+	}
+	/* remove locals */
+	sh_onstate(SH_INIT);
+	nv_scan(sh.var_tree,sh_envnolocal,(void*)0,NV_EXPORT,0);
+	nv_scan(sh.var_tree,sh_envnolocal,(void*)0,NV_ARRAY,NV_ARRAY);
+	sh_offstate(SH_INIT);
+	memset(sh.st.trapcom,0,(sh.st.trapmax+1)*sizeof(char*));
+	memset((void*)&opt,0,sizeof(opt));
+	if(sh_isoption(SH_TRACKALL))
+		on_option(&opt,SH_TRACKALL);
+	if(sh_isoption(SH_EMACS))
+		on_option(&opt,SH_EMACS);
+	if(sh_isoption(SH_GMACS))
+		on_option(&opt,SH_GMACS);
+	if(sh_isoption(SH_VI))
+		on_option(&opt,SH_VI);
+	if(sh_isoption(SH_VIRAW))
+		on_option(&opt,SH_VIRAW);
+	sh.options = opt;
+	/* set up new args */
+	if(argv)
+		sh.arglist = sh_argcreate(argv);
+	if(sh.arglist)
+		sh_argreset(sh.arglist,NIL(struct dolnod*));
+	sh.envlist=0;
+	sh.curenv = 0;
+	sh.shname = error_info.id = strdup(sh.st.dolv[0]);
+	sh_offstate(SH_FORKED);
+	sh.fn_depth = sh.dot_depth = 0;
+	sh_sigreset(0);
+	return(1);
+}
+
+/*
+ * set when creating a local variable of this name
+ */
+Namfun_t *nv_cover(register Namval_t *np)
+{
+#ifdef PATH_BFPATH
+	if(np==IFSNOD || np==PATHNOD || np==SHELLNOD || np==FPATHNOD || np==CDPNOD || np==SECONDS)
+#else
+	if(np==IFSNOD || np==PATHNOD || np==SHELLNOD || np==SECONDS)
+#endif
+		return(np->nvfun);
+#ifdef _hdr_locale
+	if(np==LCALLNOD || np==LCTYPENOD || np==LCMSGNOD || np==LCCOLLNOD || np==LCNUMNOD || np==LANGNOD)
+		return(np->nvfun);
+#endif
+	 return(0);
+}
+
+static Namtype_t typeset;
+static const char *shdiscnames[] = { "tilde", 0};
+
+/*
+ * Initialize the shell name and alias table
+ */
+static Init_t *nv_init(Shell_t *shp)
+{
+	Namval_t *np;
+	register Init_t *ip;
+	double d=0;
+	ip = newof(0,Init_t,1,0);
+	if(!ip)
+		return(0);
+	ip->sh = shp;
+	shp->var_base = shp->var_tree = inittree(shp,shtab_variables);
+	ip->IFS_init.hdr.disc = &IFS_disc;
+	ip->IFS_init.hdr.nofree = 1;
+	ip->IFS_init.sh = shp;
+	ip->PATH_init.hdr.disc = &RESTRICTED_disc;
+	ip->PATH_init.hdr.nofree = 1;
+	ip->PATH_init.sh = shp;
+#ifdef PATH_BFPATH
+	ip->FPATH_init.hdr.disc = &RESTRICTED_disc;
+	ip->FPATH_init.hdr.nofree = 1;
+	ip->FPATH_init.sh = shp;
+	ip->CDPATH_init.hdr.disc = &CDPATH_disc;
+	ip->CDPATH_init.hdr.nofree = 1;
+	ip->CDPATH_init.sh = shp;
+#endif
+	ip->SHELL_init.hdr.disc = &RESTRICTED_disc;
+	ip->SHELL_init.sh = shp;
+	ip->SHELL_init.hdr.nofree = 1;
+	ip->ENV_init.hdr.disc = &RESTRICTED_disc;
+	ip->ENV_init.hdr.nofree = 1;
+	ip->ENV_init.sh = shp;
+	ip->VISUAL_init.hdr.disc = &EDITOR_disc;
+	ip->VISUAL_init.hdr.nofree = 1;
+	ip->VISUAL_init.sh = shp;
+	ip->EDITOR_init.hdr.disc = &EDITOR_disc;
+	ip->EDITOR_init.hdr.nofree = 1;
+	ip->EDITOR_init.sh = shp;
+	ip->OPTINDEX_init.hdr.disc = &OPTINDEX_disc;
+	ip->OPTINDEX_init.hdr.nofree = 1;
+	ip->OPTINDEX_init.sh = shp;
+	ip->SECONDS_init.hdr.disc = &SECONDS_disc;
+	ip->SECONDS_init.hdr.nofree = 1;
+	ip->SECONDS_init.sh = shp;
+	ip->RAND_init.hdr.disc = &RAND_disc;
+	ip->RAND_init.hdr.nofree = 1;
+	ip->SH_MATCH_init.hdr.disc = &SH_MATCH_disc;
+	ip->SH_MATCH_init.hdr.nofree = 1;
+	ip->LINENO_init.hdr.disc = &LINENO_disc;
+	ip->LINENO_init.hdr.nofree = 1;
+	ip->LINENO_init.sh = shp;
+	ip->L_ARG_init.hdr.disc = &L_ARG_disc;
+	ip->L_ARG_init.hdr.nofree = 1;
+#ifdef _hdr_locale
+	ip->LC_TYPE_init.hdr.disc = &LC_disc;
+	ip->LC_TYPE_init.hdr.nofree = 1;
+	ip->LC_NUM_init.hdr.disc = &LC_disc;
+	ip->LC_NUM_init.hdr.nofree = 1;
+	ip->LC_COLL_init.hdr.disc = &LC_disc;
+	ip->LC_COLL_init.hdr.nofree = 1;
+	ip->LC_MSG_init.hdr.disc = &LC_disc;
+	ip->LC_MSG_init.hdr.nofree = 1;
+	ip->LC_ALL_init.hdr.disc = &LC_disc;
+	ip->LC_ALL_init.hdr.nofree = 1;
+	ip->LANG_init.hdr.disc = &LC_disc;
+	ip->LANG_init.hdr.nofree = 1;
+	ip->LC_TYPE_init.sh = shp;
+	ip->LC_NUM_init.sh = shp;
+	ip->LC_COLL_init.sh = shp;
+	ip->LC_MSG_init.sh = shp;
+	ip->LANG_init.sh = shp;
+#endif /* _hdr_locale */
+	nv_stack(IFSNOD, &ip->IFS_init.hdr);
+	nv_stack(PATHNOD, &ip->PATH_init.hdr);
+#ifdef PATH_BFPATH
+	nv_stack(FPATHNOD, &ip->FPATH_init.hdr);
+	nv_stack(CDPNOD, &ip->CDPATH_init.hdr);
+#endif
+	nv_stack(SHELLNOD, &ip->SHELL_init.hdr);
+	nv_stack(ENVNOD, &ip->ENV_init.hdr);
+	nv_stack(VISINOD, &ip->VISUAL_init.hdr);
+	nv_stack(EDITNOD, &ip->EDITOR_init.hdr);
+	nv_stack(OPTINDNOD, &ip->OPTINDEX_init.hdr);
+	nv_stack(SECONDS, &ip->SECONDS_init.hdr);
+	nv_stack(L_ARGNOD, &ip->L_ARG_init.hdr);
+	nv_putval(SECONDS, (char*)&d, NV_INTEGER|NV_DOUBLE);
+	nv_stack(RANDNOD, &ip->RAND_init.hdr);
+	d = (shp->pid&RANDMASK);
+	nv_putval(RANDNOD, (char*)&d, NV_INTEGER|NV_DOUBLE);
+	nv_stack(LINENO, &ip->LINENO_init.hdr);
+	nv_putsub(SH_MATCHNOD,(char*)0,10);
+	nv_onattr(SH_MATCHNOD,NV_RDONLY);
+	nv_stack(SH_MATCHNOD, &ip->SH_MATCH_init.hdr);
+#ifdef _hdr_locale
+	nv_stack(LCTYPENOD, &ip->LC_TYPE_init.hdr);
+	nv_stack(LCALLNOD, &ip->LC_ALL_init.hdr);
+	nv_stack(LCMSGNOD, &ip->LC_MSG_init.hdr);
+	nv_stack(LCCOLLNOD, &ip->LC_COLL_init.hdr);
+	nv_stack(LCNUMNOD, &ip->LC_NUM_init.hdr);
+	nv_stack(LANGNOD, &ip->LANG_init.hdr);
+#endif /* _hdr_locale */
+	(PPIDNOD)->nvalue.lp = (&shp->ppid);
+	(TMOUTNOD)->nvalue.lp = (&shp->st.tmout);
+	(MCHKNOD)->nvalue.lp = (&sh_mailchk);
+	(OPTINDNOD)->nvalue.lp = (&shp->st.optindex);
+	/* set up the seconds clock */
+	shp->alias_tree = inittree(shp,shtab_aliases);
+	shp->track_tree = dtopen(&_Nvdisc,Dtset);
+	shp->bltin_tree = inittree(shp,(const struct shtable2*)shtab_builtins);
+	typeset.shp = shp;
+	typeset.optstring = sh_opttypeset;
+	nv_search("typeset",shp->bltin_tree,0)->nvfun = (void*)&typeset;
+#if SHOPT_BASH
+	nv_search("local",shp->bltin_tree,0)->nvfun = (void*)&typeset;
+#endif
+	shp->fun_tree = dtopen(&_Nvdisc,Dtoset);
+	dtview(shp->fun_tree,shp->bltin_tree);
+#if SHOPT_NAMESPACE
+	if(np = nv_mount(DOTSHNOD, "global", shp->var_tree))
+		nv_onattr(np,NV_RDONLY);
+	np = nv_search("namespace",nv_dict(DOTSHNOD),NV_ADD);
+	nv_putval(np,".sh.global",NV_RDONLY|NV_NOFREE);
+	nv_stack(np, &NSPACE_init);
+#endif /* SHOPT_NAMESPACE */
+	np = nv_mount(DOTSHNOD, "type", dtopen(&_Nvdisc,Dtoset));
+	nv_adddisc(DOTSHNOD, shdiscnames, (Namval_t**)0);
+	return(ip);
+}
+
+/*
+ * initialize name-value pairs
+ */
+
+static Dt_t *inittree(Shell_t *shp,const struct shtable2 *name_vals)
+{
+	register Namval_t *np;
+	register const struct shtable2 *tp;
+	register unsigned n = 0;
+	register Dt_t *treep;
+	Dt_t *base_treep, *dict;
+	for(tp=name_vals;*tp->sh_name;tp++)
+		n++;
+	np = (Namval_t*)calloc(n,sizeof(Namval_t));
+	if(!shp->bltin_nodes)
+		shp->bltin_nodes = np;
+	else if(name_vals==(const struct shtable2*)shtab_builtins)
+		shp->bltin_cmds = np;
+	base_treep = treep = dtopen(&_Nvdisc,Dtoset);
+	for(tp=name_vals;*tp->sh_name;tp++,np++)
+	{
+		if((np->nvname = strrchr(tp->sh_name,'.')) && np->nvname!=((char*)tp->sh_name))
+			np->nvname++;
+		else
+		{
+			np->nvname = (char*)tp->sh_name;
+			treep = base_treep;
+		}
+		np->nvenv = 0;
+		if(name_vals==(const struct shtable2*)shtab_builtins)
+			np->nvalue.bfp = ((struct shtable3*)tp)->sh_value;
+		else
+			np->nvalue.cp = (char*)tp->sh_value;
+		nv_setattr(np,tp->sh_number);
+		if(nv_istable(np))
+			nv_mount(np,(const char*)0,dict=dtopen(&_Nvdisc,Dtoset));
+		if(nv_isattr(np,NV_INTEGER))
+			nv_setsize(np,10);
+		else
+			nv_setsize(np,0);
+		dtinsert(treep,np);
+		if(nv_istable(np))
+			treep = dict;
+	}
+	return(treep);
+}
+
+/*
+ * read in the process environment and set up name-value pairs
+ * skip over items that are not name-value pairs
+ */
+
+static void env_init(Shell_t *shp)
+{
+	register char *cp;
+	register Namval_t	*np;
+	register char **ep=environ;
+	register char *next=0;
+#ifdef _ENV_H
+	shp->env = env_open(environ,3);
+	env_delete(shp->env,"_");
+#endif
+	if(ep)
+	{
+		while(cp= *ep++)
+		{
+			if(*cp=='A' && cp[1]=='_' && cp[2]=='_' && cp[3]=='z' && cp[4]=='=')
+				next = cp+4;
+			else if(np=nv_open(cp,shp->var_tree,(NV_EXPORT|NV_IDENT|NV_ASSIGN|NV_NOFAIL))) 
+			{
+				nv_onattr(np,NV_IMPORT);
+				np->nvenv = cp;
+				nv_close(np);
+			}
+		}
+		while(cp=next)
+		{
+			if(next = strchr(++cp,'='))
+				*next = 0;
+			np = nv_search(cp+2,shp->var_tree,NV_ADD);
+			if(nv_isattr(np,NV_IMPORT|NV_EXPORT))
+			{
+				int flag = *(unsigned char*)cp-' ';
+				int size = *(unsigned char*)(cp+1)-' ';
+				if((flag&NV_INTEGER) && size==0)
+				{
+					/* check for floating*/
+					char *ep,*val = nv_getval(np);
+					strtol(val,&ep,10);
+					if(*ep=='.' || *ep=='e' || *ep=='E')
+					{
+						char *lp;
+						flag |= NV_DOUBLE;
+						if(*ep=='.')
+						{
+							strtol(ep+1,&lp,10);
+							if(*lp)
+								ep = lp;
+						}
+						if(*ep && *ep!='.')
+						{
+							flag |= NV_EXPNOTE;
+							size = ep-val;
+						}
+						else
+							size = strlen(ep);
+						size--;
+					}
+				}
+				nv_newattr(np,flag|NV_IMPORT|NV_EXPORT,size);
+			}
+		}
+	}
+#ifdef _ENV_H
+	env_delete(sh.env,e_envmarker);
+#endif
+	if(nv_isnull(PWDNOD) || nv_isattr(PWDNOD,NV_TAGGED))
+	{
+		nv_offattr(PWDNOD,NV_TAGGED);
+		path_pwd(0);
+	}
+	if((cp = nv_getval(SHELLNOD)) && (sh_type(cp)&SH_TYPE_RESTRICTED))
+		sh_onoption(SH_RESTRICTED); /* restricted shell */
+	return;
+}
+
+/*
+ * terminate shell and free up the space
+ */
+int sh_term(void)
+{
+	sfdisc(sfstdin,SF_POPDISC);
+	free((char*)sh.outbuff);
+	stakset(NIL(char*),0);
+	return(0);
+}
+
+/* function versions of these */
+
+#define DISABLE	/* proto workaround */
+
+unsigned long sh_isoption DISABLE (int opt)
+{
+	return(sh_isoption(opt));
+}
+
+unsigned long sh_onoption DISABLE (int opt)
+{
+	return(sh_onoption(opt));
+}
+
+unsigned long sh_offoption DISABLE (int opt)
+{
+	return(sh_offoption(opt));
+}
+
+void	sh_sigcheck DISABLE (void)
+{
+	sh_sigcheck();
+}
+
+Dt_t*	sh_bltin_tree DISABLE (void)
+{
+	return(sh.bltin_tree);
+}