Dispose of ash.

We haven't used ash for several releases. Remove ash and its
companion liblinenoise.

I've left the support for an alternative shell here for now,
but we can move that out to external/mksh later if we want.
(For now this seemed like a somewhat useful signpost to the real shell.)

Change-Id: I634c7969f6cbe375a2bc56fc1077e64888380f3d

1 files changed, 0 insertions, 825 deletions

diff --git a/sh/var.c b/sh/var.c
deleted file mode 100644
index a1f1689..0000000
--- a/sh/var.c
+++ /dev/null
@@ -1,825 +0,0 @@
-/*	$NetBSD: var.c,v 1.36 2004/10/06 10:23:43 enami Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)var.c	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: var.c,v 1.36 2004/10/06 10:23:43 enami Exp $");
-#endif
-#endif /* not lint */
-
-#include <unistd.h>
-#include <stdlib.h>
-#include <paths.h>
-
-/*
- * Shell variables.
- */
-
-#include "shell.h"
-#include "output.h"
-#include "expand.h"
-#include "nodes.h"	/* for other headers */
-#include "eval.h"	/* defines cmdenviron */
-#include "exec.h"
-#include "syntax.h"
-#include "options.h"
-#include "var.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "parser.h"
-#include "show.h"
-#ifndef SMALL
-#include "myhistedit.h"
-#endif
-
-#ifdef SMALL
-#define VTABSIZE 39
-#else
-#define VTABSIZE 517
-#endif
-
-
-struct varinit {
-	struct var *var;
-	int flags;
-	const char *text;
-	void (*func)(const char *);
-};
-
-
-#if ATTY
-struct var vatty;
-#endif
-#ifdef WITH_HISTORY
-struct var vhistsize;
-struct var vterm;
-#endif
-struct var vifs;
-struct var vmpath;
-struct var vpath;
-struct var vps1;
-struct var vps2;
-struct var vps4;
-struct var vvers;
-struct var voptind;
-
-const struct varinit varinit[] = {
-#if ATTY
-	{ &vatty,	VSTRFIXED|VTEXTFIXED|VUNSET,	"ATTY=",
-	  NULL },
-#endif
-#ifdef WITH_HISTORY
-	{ &vhistsize,	VSTRFIXED|VTEXTFIXED|VUNSET,	"HISTSIZE=",
-	  sethistsize },
-#endif
-	{ &vifs,	VSTRFIXED|VTEXTFIXED,		"IFS= \t\n",
-	  NULL },
-	{ &vmpath,	VSTRFIXED|VTEXTFIXED|VUNSET,	"MAILPATH=",
-	  NULL },
-	{ &vpath,	VSTRFIXED|VTEXTFIXED,		"PATH=" _PATH_DEFPATH,
-	  changepath },
-	/*
-	 * vps1 depends on uid
-	 */
-	{ &vps2,	VSTRFIXED|VTEXTFIXED,		"PS2=> ",
-	  NULL },
-	{ &vps4,	VSTRFIXED|VTEXTFIXED,		"PS4=+ ",
-	  NULL },
-#ifdef WITH_HISTORY
-	{ &vterm,	VSTRFIXED|VTEXTFIXED|VUNSET,	"TERM=",
-	  setterm },
-#endif
-	{ &voptind,	VSTRFIXED|VTEXTFIXED|VNOFUNC,	"OPTIND=1",
-	  getoptsreset },
-	{ NULL,	0,				NULL,
-	  NULL }
-};
-
-struct var *vartab[VTABSIZE];
-
-STATIC int strequal(const char *, const char *);
-STATIC struct var *find_var(const char *, struct var ***, int *);
-
-/*
- * Initialize the varable symbol tables and import the environment
- */
-
-#ifdef mkinit
-INCLUDE "var.h"
-MKINIT char **environ;
-INIT {
-	char **envp;
-
-	initvar();
-	for (envp = environ ; *envp ; envp++) {
-		if (strchr(*envp, '=')) {
-			setvareq(*envp, VEXPORT|VTEXTFIXED);
-		}
-	}
-}
-#endif
-
-
-/*
- * This routine initializes the builtin variables.  It is called when the
- * shell is initialized and again when a shell procedure is spawned.
- */
-
-void
-initvar(void)
-{
-	const struct varinit *ip;
-	struct var *vp;
-	struct var **vpp;
-
-	for (ip = varinit ; (vp = ip->var) != NULL ; ip++) {
-		if (find_var(ip->text, &vpp, &vp->name_len) != NULL)
-			continue;
-		vp->next = *vpp;
-		*vpp = vp;
-		vp->text = strdup(ip->text);
-		vp->flags = ip->flags;
-		vp->func = ip->func;
-	}
-	/*
-	 * PS1 depends on uid
-	 */
-	if (find_var("PS1", &vpp, &vps1.name_len) == NULL) {
-		vps1.next = *vpp;
-		*vpp = &vps1;
-		vps1.text = strdup(geteuid() ? "PS1=$ " : "PS1=# ");
-		vps1.flags = VSTRFIXED|VTEXTFIXED;
-	}
-}
-
-/*
- * Safe version of setvar, returns 1 on success 0 on failure.
- */
-
-int
-setvarsafe(const char *name, const char *val, int flags)
-{
-	struct jmploc jmploc;
-	struct jmploc *volatile savehandler = handler;
-	int err = 0;
-#ifdef __GNUC__
-	(void) &err;
-#endif
-
-	if (setjmp(jmploc.loc))
-		err = 1;
-	else {
-		handler = &jmploc;
-		setvar(name, val, flags);
-	}
-	handler = savehandler;
-	return err;
-}
-
-/*
- * Set the value of a variable.  The flags argument is ored with the
- * flags of the variable.  If val is NULL, the variable is unset.
- */
-
-void
-setvar(const char *name, const char *val, int flags)
-{
-	const char *p;
-	const char *q;
-	char *d;
-	int len;
-	int namelen;
-	char *nameeq;
-	int isbad;
-
-	isbad = 0;
-	p = name;
-	if (! is_name(*p))
-		isbad = 1;
-	p++;
-	for (;;) {
-		if (! is_in_name(*p)) {
-			if (*p == '\0' || *p == '=')
-				break;
-			isbad = 1;
-		}
-		p++;
-	}
-	namelen = p - name;
-	if (isbad)
-		error("%.*s: bad variable name", namelen, name);
-	len = namelen + 2;		/* 2 is space for '=' and '\0' */
-	if (val == NULL) {
-		flags |= VUNSET;
-	} else {
-		len += strlen(val);
-	}
-	d = nameeq = ckmalloc(len);
-	q = name;
-	while (--namelen >= 0)
-		*d++ = *q++;
-	*d++ = '=';
-	*d = '\0';
-	if (val)
-		scopy(val, d);
-	setvareq(nameeq, flags);
-}
-
-
-
-/*
- * Same as setvar except that the variable and value are passed in
- * the first argument as name=value.  Since the first argument will
- * be actually stored in the table, it should not be a string that
- * will go away.
- */
-
-void
-setvareq(char *s, int flags)
-{
-	struct var *vp, **vpp;
-	int nlen;
-
-	if (aflag)
-		flags |= VEXPORT;
-	vp = find_var(s, &vpp, &nlen);
-	if (vp != NULL) {
-		if (vp->flags & VREADONLY)
-			error("%.*s: is read only", vp->name_len, s);
-		if (flags & VNOSET)
-			return;
-		INTOFF;
-
-		if (vp->func && (flags & VNOFUNC) == 0)
-			(*vp->func)(s + vp->name_len + 1);
-
-		if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
-			ckfree(vp->text);
-
-		vp->flags &= ~(VTEXTFIXED|VSTACK|VUNSET);
-		vp->flags |= flags & ~VNOFUNC;
-		vp->text = s;
-
-		INTON;
-		return;
-	}
-	/* not found */
-	if (flags & VNOSET)
-		return;
-	vp = ckmalloc(sizeof (*vp));
-	vp->flags = flags & ~VNOFUNC;
-	vp->text = s;
-	vp->name_len = nlen;
-	vp->next = *vpp;
-	vp->func = NULL;
-	*vpp = vp;
-}
-
-
-
-/*
- * Process a linked list of variable assignments.
- */
-
-void
-listsetvar(struct strlist *list, int flags)
-{
-	struct strlist *lp;
-
-	INTOFF;
-	for (lp = list ; lp ; lp = lp->next) {
-		setvareq(savestr(lp->text), flags);
-	}
-	INTON;
-}
-
-void
-listmklocal(struct strlist *list, int flags)
-{
-	struct strlist *lp;
-
-	for (lp = list ; lp ; lp = lp->next)
-		mklocal(lp->text, flags);
-}
-
-
-/*
- * Find the value of a variable.  Returns NULL if not set.
- */
-
-char *
-lookupvar(const char *name)
-{
-	struct var *v;
-
-	v = find_var(name, NULL, NULL);
-	if (v == NULL || v->flags & VUNSET)
-		return NULL;
-	return v->text + v->name_len + 1;
-}
-
-
-
-/*
- * Search the environment of a builtin command.  If the second argument
- * is nonzero, return the value of a variable even if it hasn't been
- * exported.
- */
-
-char *
-bltinlookup(const char *name, int doall)
-{
-	struct strlist *sp;
-	struct var *v;
-
-	for (sp = cmdenviron ; sp ; sp = sp->next) {
-		if (strequal(sp->text, name))
-			return strchr(sp->text, '=') + 1;
-	}
-
-	v = find_var(name, NULL, NULL);
-
-	if (v == NULL || v->flags & VUNSET || (!doall && !(v->flags & VEXPORT)))
-		return NULL;
-	return v->text + v->name_len + 1;
-}
-
-
-
-/*
- * Generate a list of exported variables.  This routine is used to construct
- * the third argument to execve when executing a program.
- */
-
-char **
-environment(void)
-{
-	int nenv;
-	struct var **vpp;
-	struct var *vp;
-	char **env;
-	char **ep;
-
-	nenv = 0;
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (vp = *vpp ; vp ; vp = vp->next)
-			if (vp->flags & VEXPORT)
-				nenv++;
-	}
-	ep = env = stalloc((nenv + 1) * sizeof *env);
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (vp = *vpp ; vp ; vp = vp->next)
-			if (vp->flags & VEXPORT)
-				*ep++ = vp->text;
-	}
-	*ep = NULL;
-	return env;
-}
-
-
-/*
- * Called when a shell procedure is invoked to clear out nonexported
- * variables.  It is also necessary to reallocate variables of with
- * VSTACK set since these are currently allocated on the stack.
- */
-
-#ifdef mkinit
-void shprocvar(void);
-
-SHELLPROC {
-	shprocvar();
-}
-#endif
-
-void
-shprocvar(void)
-{
-	struct var **vpp;
-	struct var *vp, **prev;
-
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (prev = vpp ; (vp = *prev) != NULL ; ) {
-			if ((vp->flags & VEXPORT) == 0) {
-				*prev = vp->next;
-				if ((vp->flags & VTEXTFIXED) == 0)
-					ckfree(vp->text);
-				if ((vp->flags & VSTRFIXED) == 0)
-					ckfree(vp);
-			} else {
-				if (vp->flags & VSTACK) {
-					vp->text = savestr(vp->text);
-					vp->flags &=~ VSTACK;
-				}
-				prev = &vp->next;
-			}
-		}
-	}
-	initvar();
-}
-
-
-
-/*
- * Command to list all variables which are set.  Currently this command
- * is invoked from the set command when the set command is called without
- * any variables.
- */
-
-void
-print_quoted(const char *p)
-{
-	const char *q;
-
-	if (strcspn(p, "|&;<>()$`\\\"' \t\n*?[]#~=%") == strlen(p)) {
-		out1fmt("%s", p);
-		return;
-	}
-	while (*p) {
-		if (*p == '\'') {
-			out1fmt("\\'");
-			p++;
-			continue;
-		}
-		q = index(p, '\'');
-		if (!q) {
-			out1fmt("'%s'", p );
-			return;
-		}
-		out1fmt("'%.*s'", (int)(q - p), p );
-		p = q;
-	}
-}
-
-static int
-sort_var(const void *v_v1, const void *v_v2)
-{
-	const struct var * const *v1 = v_v1;
-	const struct var * const *v2 = v_v2;
-
-	/* XXX Will anyone notice we include the '=' of the shorter name? */
-	return strcmp((*v1)->text, (*v2)->text);
-}
-
-/*
- * POSIX requires that 'set' (but not export or readonly) output the
- * variables in lexicographic order - by the locale's collating order (sigh).
- * Maybe we could keep them in an ordered balanced binary tree
- * instead of hashed lists.
- * For now just roll 'em through qsort for printing...
- */
-
-int
-showvars(const char *name, int flag, int show_value)
-{
-	struct var **vpp;
-	struct var *vp;
-	const char *p;
-
-	static struct var **list;	/* static in case we are interrupted */
-	static int list_len;
-	int count = 0;
-
-	if (!list) {
-		list_len = 32;
-		list = ckmalloc(list_len * sizeof *list);
-	}
-
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (vp = *vpp ; vp ; vp = vp->next) {
-			if (flag && !(vp->flags & flag))
-				continue;
-			if (vp->flags & VUNSET && !(show_value & 2))
-				continue;
-			if (count >= list_len) {
-				list = ckrealloc(list,
-					(list_len << 1) * sizeof *list);
-				list_len <<= 1;
-			}
-			list[count++] = vp;
-		}
-	}
-
-	qsort(list, count, sizeof *list, sort_var);
-
-	for (vpp = list; count--; vpp++) {
-		vp = *vpp;
-		if (name)
-			out1fmt("%s ", name);
-		for (p = vp->text ; *p != '=' ; p++)
-			out1c(*p);
-		if (!(vp->flags & VUNSET) && show_value) {
-			out1fmt("=");
-			print_quoted(++p);
-		}
-		out1c('\n');
-	}
-	return 0;
-}
-
-
-
-/*
- * The export and readonly commands.
- */
-
-int
-exportcmd(int argc, char **argv)
-{
-	struct var *vp;
-	char *name;
-	const char *p;
-	int flag = argv[0][0] == 'r'? VREADONLY : VEXPORT;
-	int pflag;
-
-	pflag = nextopt("p") == 'p' ? 3 : 0;
-	if (argc <= 1 || pflag) {
-		showvars( pflag ? argv[0] : 0, flag, pflag );
-		return 0;
-	}
-
-	while ((name = *argptr++) != NULL) {
-		if ((p = strchr(name, '=')) != NULL) {
-			p++;
-		} else {
-			vp = find_var(name, NULL, NULL);
-			if (vp != NULL) {
-				vp->flags |= flag;
-				continue;
-			}
-		}
-		setvar(name, p, flag);
-	}
-	return 0;
-}
-
-
-/*
- * The "local" command.
- */
-
-int
-localcmd(int argc, char **argv)
-{
-	char *name;
-
-	if (! in_function())
-		error("Not in a function");
-	while ((name = *argptr++) != NULL) {
-		mklocal(name, 0);
-	}
-	return 0;
-}
-
-
-/*
- * Make a variable a local variable.  When a variable is made local, it's
- * value and flags are saved in a localvar structure.  The saved values
- * will be restored when the shell function returns.  We handle the name
- * "-" as a special case.
- */
-
-void
-mklocal(const char *name, int flags)
-{
-	struct localvar *lvp;
-	struct var **vpp;
-	struct var *vp;
-
-	INTOFF;
-	lvp = ckmalloc(sizeof (struct localvar));
-	if (name[0] == '-' && name[1] == '\0') {
-		char *p;
-		p = ckmalloc(sizeof_optlist);
-		lvp->text = memcpy(p, optlist, sizeof_optlist);
-		vp = NULL;
-	} else {
-		vp = find_var(name, &vpp, NULL);
-		if (vp == NULL) {
-			if (strchr(name, '='))
-				setvareq(savestr(name), VSTRFIXED|flags);
-			else
-				setvar(name, NULL, VSTRFIXED|flags);
-			vp = *vpp;	/* the new variable */
-			lvp->text = NULL;
-			lvp->flags = VUNSET;
-		} else {
-			lvp->text = vp->text;
-			lvp->flags = vp->flags;
-			vp->flags |= VSTRFIXED|VTEXTFIXED;
-			if (name[vp->name_len] == '=')
-				setvareq(savestr(name), flags);
-		}
-	}
-	lvp->vp = vp;
-	lvp->next = localvars;
-	localvars = lvp;
-	INTON;
-}
-
-
-/*
- * Called after a function returns.
- */
-
-void
-poplocalvars(void)
-{
-	struct localvar *lvp;
-	struct var *vp;
-
-	while ((lvp = localvars) != NULL) {
-		localvars = lvp->next;
-		vp = lvp->vp;
-		TRACE(("poplocalvar %s", vp ? vp->text : "-"));
-		if (vp == NULL) {	/* $- saved */
-			memcpy(optlist, lvp->text, sizeof_optlist);
-			ckfree(lvp->text);
-		} else if ((lvp->flags & (VUNSET|VSTRFIXED)) == VUNSET) {
-			(void)unsetvar(vp->text, 0);
-		} else {
-			if (vp->func && (vp->flags & VNOFUNC) == 0)
-				(*vp->func)(lvp->text + vp->name_len + 1);
-			if ((vp->flags & VTEXTFIXED) == 0)
-				ckfree(vp->text);
-			vp->flags = lvp->flags;
-			vp->text = lvp->text;
-		}
-		ckfree(lvp);
-	}
-}
-
-
-int
-setvarcmd(int argc, char **argv)
-{
-	if (argc <= 2)
-		return unsetcmd(argc, argv);
-	else if (argc == 3)
-		setvar(argv[1], argv[2], 0);
-	else
-		error("List assignment not implemented");
-	return 0;
-}
-
-
-/*
- * The unset builtin command.  We unset the function before we unset the
- * variable to allow a function to be unset when there is a readonly variable
- * with the same name.
- */
-
-int
-unsetcmd(int argc, char **argv)
-{
-	char **ap;
-	int i;
-	int flg_func = 0;
-	int flg_var = 0;
-	int ret = 0;
-
-	while ((i = nextopt("evf")) != '\0') {
-		if (i == 'f')
-			flg_func = 1;
-		else
-			flg_var = i;
-	}
-	if (flg_func == 0 && flg_var == 0)
-		flg_var = 1;
-
-	for (ap = argptr; *ap ; ap++) {
-		if (flg_func)
-			ret |= unsetfunc(*ap);
-		if (flg_var)
-			ret |= unsetvar(*ap, flg_var == 'e');
-	}
-	return ret;
-}
-
-
-/*
- * Unset the specified variable.
- */
-
-int
-unsetvar(const char *s, int unexport)
-{
-	struct var **vpp;
-	struct var *vp;
-
-	vp = find_var(s, &vpp, NULL);
-	if (vp == NULL)
-		return 1;
-
-	if (vp->flags & VREADONLY)
-		return (1);
-
-	INTOFF;
-	if (unexport) {
-		vp->flags &= ~VEXPORT;
-	} else {
-		if (vp->text[vp->name_len + 1] != '\0')
-			setvar(s, nullstr, 0);
-		vp->flags &= ~VEXPORT;
-		vp->flags |= VUNSET;
-		if ((vp->flags & VSTRFIXED) == 0) {
-			if ((vp->flags & VTEXTFIXED) == 0)
-				ckfree(vp->text);
-			*vpp = vp->next;
-			ckfree(vp);
-		}
-	}
-	INTON;
-	return 0;
-}
-
-
-/*
- * Returns true if the two strings specify the same varable.  The first
- * variable name is terminated by '='; the second may be terminated by
- * either '=' or '\0'.
- */
-
-STATIC int
-strequal(const char *p, const char *q)
-{
-	while (*p == *q++) {
-		if (*p++ == '=')
-			return 1;
-	}
-	if (*p == '=' && *(q - 1) == '\0')
-		return 1;
-	return 0;
-}
-
-/*
- * Search for a variable.
- * 'name' may be terminated by '=' or a NUL.
- * vppp is set to the pointer to vp, or the list head if vp isn't found
- * lenp is set to the number of charactets in 'name'
- */
-
-STATIC struct var *
-find_var(const char *name, struct var ***vppp, int *lenp)
-{
-	unsigned int hashval;
-	int len;
-	struct var *vp, **vpp;
-	const char *p = name;
-
-	hashval = 0;
-	while (*p && *p != '=')
-		hashval = 2 * hashval + (unsigned char)*p++;
-	len = p - name;
-
-	if (lenp)
-		*lenp = len;
-	vpp = &vartab[hashval % VTABSIZE];
-	if (vppp)
-		*vppp = vpp;
-
-	for (vp = *vpp ; vp ; vpp = &vp->next, vp = *vpp) {
-		if (vp->name_len != len)
-			continue;
-		if (memcmp(vp->text, name, len) != 0)
-			continue;
-		if (vppp)
-			*vppp = vpp;
-		return vp;
-	}
-	return NULL;
-}