Remove 1sh

1 files changed, 0 insertions, 1553 deletions

diff --git a/bin/1sh/expand.c b/bin/1sh/expand.c
deleted file mode 100644
index 3bdd0733..00000000
--- a/bin/1sh/expand.c
+++ /dev/null
@@ -1,1553 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- * Copyright (c) 1997-2005
- *	Herbert Xu <herbert@gondor.apana.org.au>.  All rights reserved.
- * Copyright (c) 2010-2015
- *	Jilles Tjoelker <jilles@stack.nl>.  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.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)expand.c	8.5 (Berkeley) 5/15/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-/* $FreeBSD: releng/12.1/bin/sh/expand.c 341767 2018-12-09 19:14:21Z jilles $ */
-
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <wchar.h>
-#include <wctype.h>
-
-/*
- * Routines to expand arguments to commands.  We have to deal with
- * backquotes, shell variables, and file metacharacters.
- */
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"
-#include "eval.h"
-#include "expand.h"
-#include "syntax.h"
-#include "parser.h"
-#include "jobs.h"
-#include "options.h"
-#include "var.h"
-#include "input.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "arith.h"
-#include "show.h"
-#include "builtins.h"
-
-enum wordstate { WORD_IDLE, WORD_WS_DELIMITED, WORD_QUOTEMARK };
-
-struct worddest {
-	struct arglist *list;
-	enum wordstate state;
-};
-
-static char *expdest;			/* output of current string */
-
-static const char *argstr(const char *, struct nodelist **restrict, int,
-    struct worddest *);
-static const char *exptilde(const char *, int);
-static const char *expari(const char *, struct nodelist **restrict, int,
-    struct worddest *);
-static void expbackq(union node *, int, int, struct worddest *);
-static const char *subevalvar_trim(const char *, struct nodelist **restrict,
-    int, int, int);
-static const char *subevalvar_misc(const char *, struct nodelist **restrict,
-    const char *, int, int, int);
-static const char *evalvar(const char *, struct nodelist **restrict, int,
-    struct worddest *);
-static int varisset(const char *, int);
-static void strtodest(const char *, int, int, int, struct worddest *);
-static void reprocess(int, int, int, int, struct worddest *);
-static void varvalue(const char *, int, int, int, struct worddest *);
-static void expandmeta(char *, struct arglist *);
-static void expmeta(char *, char *, struct arglist *);
-static int expsortcmp(const void *, const void *);
-static int patmatch(const char *, const char *);
-static void cvtnum(int, char *);
-static int collate_range_cmp(wchar_t, wchar_t);
-
-void
-emptyarglist(struct arglist *list)
-{
-
-	list->args = list->smallarg;
-	list->count = 0;
-	list->capacity = sizeof(list->smallarg) / sizeof(list->smallarg[0]);
-}
-
-void
-appendarglist(struct arglist *list, char *str)
-{
-	char **newargs;
-	int newcapacity;
-
-	if (list->count >= list->capacity) {
-		newcapacity = list->capacity * 2;
-		if (newcapacity < 16)
-			newcapacity = 16;
-		if (newcapacity > INT_MAX / (int)sizeof(newargs[0]))
-			error("Too many entries in arglist");
-		newargs = stalloc(newcapacity * sizeof(newargs[0]));
-		memcpy(newargs, list->args, list->count * sizeof(newargs[0]));
-		list->args = newargs;
-		list->capacity = newcapacity;
-	}
-	list->args[list->count++] = str;
-}
-
-static int
-collate_range_cmp(wchar_t c1, wchar_t c2)
-{
-	wchar_t s1[2], s2[2];
-
-	s1[0] = c1;
-	s1[1] = L'\0';
-	s2[0] = c2;
-	s2[1] = L'\0';
-	return (wcscoll(s1, s2));
-}
-
-static char *
-stputs_quotes(const char *data, const char *syntax, char *p)
-{
-	while (*data) {
-		CHECKSTRSPACE(2, p);
-		if (syntax[(int)*data] == CCTL)
-			USTPUTC(CTLESC, p);
-		USTPUTC(*data++, p);
-	}
-	return (p);
-}
-#define STPUTS_QUOTES(data, syntax, p) p = stputs_quotes((data), syntax, p)
-
-static char *
-nextword(char c, int flag, char *p, struct worddest *dst)
-{
-	int is_ws;
-
-	is_ws = c == '\t' || c == '\n' || c == ' ';
-	if (p != stackblock() || (is_ws ? dst->state == WORD_QUOTEMARK :
-	    dst->state != WORD_WS_DELIMITED) || c == '\0') {
-		STPUTC('\0', p);
-		if (flag & EXP_GLOB)
-			expandmeta(grabstackstr(p), dst->list);
-		else
-			appendarglist(dst->list, grabstackstr(p));
-		dst->state = is_ws ? WORD_WS_DELIMITED : WORD_IDLE;
-	} else if (!is_ws && dst->state == WORD_WS_DELIMITED)
-		dst->state = WORD_IDLE;
-	/* Reserve space while the stack string is empty. */
-	appendarglist(dst->list, NULL);
-	dst->list->count--;
-	STARTSTACKSTR(p);
-	return p;
-}
-#define NEXTWORD(c, flag, p, dstlist) p = nextword(c, flag, p, dstlist)
-
-static char *
-stputs_split(const char *data, const char *syntax, int flag, char *p,
-    struct worddest *dst)
-{
-	const char *ifs;
-	char c;
-
-	ifs = ifsset() ? ifsval() : " \t\n";
-	while (*data) {
-		CHECKSTRSPACE(2, p);
-		c = *data++;
-		if (strchr(ifs, c) != NULL) {
-			NEXTWORD(c, flag, p, dst);
-			continue;
-		}
-		if (flag & EXP_GLOB && syntax[(int)c] == CCTL)
-			USTPUTC(CTLESC, p);
-		USTPUTC(c, p);
-	}
-	return (p);
-}
-#define STPUTS_SPLIT(data, syntax, flag, p, dst) p = stputs_split((data), syntax, flag, p, dst)
-
-/*
- * Perform expansions on an argument, placing the resulting list of arguments
- * in arglist.  Parameter expansion, command substitution and arithmetic
- * expansion are always performed; additional expansions can be requested
- * via flag (EXP_*).
- * The result is left in the stack string.
- * When arglist is NULL, perform here document expansion.
- *
- * When doing something that may cause this to be re-entered, make sure
- * the stack string is empty via grabstackstr() and do not assume expdest
- * remains valid.
- */
-void
-expandarg(union node *arg, struct arglist *arglist, int flag)
-{
-	struct worddest exparg;
-	struct nodelist *argbackq;
-
-	if (fflag)
-		flag &= ~EXP_GLOB;
-	argbackq = arg->narg.backquote;
-	exparg.list = arglist;
-	exparg.state = WORD_IDLE;
-	STARTSTACKSTR(expdest);
-	argstr(arg->narg.text, &argbackq, flag, &exparg);
-	if (arglist == NULL) {
-		STACKSTRNUL(expdest);
-		return;			/* here document expanded */
-	}
-	if ((flag & EXP_SPLIT) == 0 || expdest != stackblock() ||
-	    exparg.state == WORD_QUOTEMARK) {
-		STPUTC('\0', expdest);
-		if (flag & EXP_SPLIT) {
-			if (flag & EXP_GLOB)
-				expandmeta(grabstackstr(expdest), exparg.list);
-			else
-				appendarglist(exparg.list, grabstackstr(expdest));
-		}
-	}
-	if ((flag & EXP_SPLIT) == 0)
-		appendarglist(arglist, grabstackstr(expdest));
-}
-
-
-
-/*
- * Perform parameter expansion, command substitution and arithmetic
- * expansion, and tilde expansion if requested via EXP_TILDE/EXP_VARTILDE.
- * Processing ends at a CTLENDVAR or CTLENDARI character as well as '\0'.
- * This is used to expand word in ${var+word} etc.
- * If EXP_GLOB or EXP_CASE are set, keep and/or generate CTLESC
- * characters to allow for further processing.
- *
- * If EXP_SPLIT is set, dst receives any complete words produced.
- */
-static const char *
-argstr(const char *p, struct nodelist **restrict argbackq, int flag,
-    struct worddest *dst)
-{
-	char c;
-	int quotes = flag & (EXP_GLOB | EXP_CASE);	/* do CTLESC */
-	int firsteq = 1;
-	int split_lit;
-	int lit_quoted;
-
-	split_lit = flag & EXP_SPLIT_LIT;
-	lit_quoted = flag & EXP_LIT_QUOTED;
-	flag &= ~(EXP_SPLIT_LIT | EXP_LIT_QUOTED);
-	if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE)))
-		p = exptilde(p, flag);
-	for (;;) {
-		CHECKSTRSPACE(2, expdest);
-		switch (c = *p++) {
-		case '\0':
-			return (p - 1);
-		case CTLENDVAR:
-		case CTLENDARI:
-			return (p);
-		case CTLQUOTEMARK:
-			lit_quoted = 1;
-			/* "$@" syntax adherence hack */
-			if (p[0] == CTLVAR && (p[1] & VSQUOTE) != 0 &&
-			    p[2] == '@' && p[3] == '=')
-				break;
-			if ((flag & EXP_SPLIT) != 0 && expdest == stackblock())
-				dst->state = WORD_QUOTEMARK;
-			break;
-		case CTLQUOTEEND:
-			lit_quoted = 0;
-			break;
-		case CTLESC:
-			c = *p++;
-			if (split_lit && !lit_quoted &&
-			    strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
-				NEXTWORD(c, flag, expdest, dst);
-				break;
-			}
-			if (quotes)
-				USTPUTC(CTLESC, expdest);
-			USTPUTC(c, expdest);
-			break;
-		case CTLVAR:
-			p = evalvar(p, argbackq, flag, dst);
-			break;
-		case CTLBACKQ:
-		case CTLBACKQ|CTLQUOTE:
-			expbackq((*argbackq)->n, c & CTLQUOTE, flag, dst);
-			*argbackq = (*argbackq)->next;
-			break;
-		case CTLARI:
-			p = expari(p, argbackq, flag, dst);
-			break;
-		case ':':
-		case '=':
-			/*
-			 * sort of a hack - expand tildes in variable
-			 * assignments (after the first '=' and after ':'s).
-			 */
-			if (split_lit && !lit_quoted &&
-			    strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
-				NEXTWORD(c, flag, expdest, dst);
-				break;
-			}
-			USTPUTC(c, expdest);
-			if (flag & EXP_VARTILDE && *p == '~' &&
-			    (c != '=' || firsteq)) {
-				if (c == '=')
-					firsteq = 0;
-				p = exptilde(p, flag);
-			}
-			break;
-		default:
-			if (split_lit && !lit_quoted &&
-			    strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
-				NEXTWORD(c, flag, expdest, dst);
-				break;
-			}
-			USTPUTC(c, expdest);
-		}
-	}
-}
-
-/*
- * Perform tilde expansion, placing the result in the stack string and
- * returning the next position in the input string to process.
- */
-static const char *
-exptilde(const char *p, int flag)
-{
-	char c;
-	const char *startp = p;
-	const char *user;
-	struct passwd *pw;
-	char *home;
-	int len;
-
-	for (;;) {
-		c = *p;
-		switch(c) {
-		case CTLESC: /* This means CTL* are always considered quoted. */
-		case CTLVAR:
-		case CTLBACKQ:
-		case CTLBACKQ | CTLQUOTE:
-		case CTLARI:
-		case CTLENDARI:
-		case CTLQUOTEMARK:
-			return (startp);
-		case ':':
-			if ((flag & EXP_VARTILDE) == 0)
-				break;
-			/* FALLTHROUGH */
-		case '\0':
-		case '/':
-		case CTLENDVAR:
-			len = p - startp - 1;
-			STPUTBIN(startp + 1, len, expdest);
-			STACKSTRNUL(expdest);
-			user = expdest - len;
-			if (*user == '\0') {
-				home = lookupvar("HOME");
-			} else {
-				pw = getpwnam(user);
-				home = pw != NULL ? pw->pw_dir : NULL;
-			}
-			STADJUST(-len, expdest);
-			if (home == NULL || *home == '\0')
-				return (startp);
-			strtodest(home, flag, VSNORMAL, 1, NULL);
-			return (p);
-		}
-		p++;
-	}
-}
-
-
-/*
- * Expand arithmetic expression.
- */
-static const char *
-expari(const char *p, struct nodelist **restrict argbackq, int flag,
-    struct worddest *dst)
-{
-	char *q, *start;
-	arith_t result;
-	int begoff;
-	int quoted;
-	int adj;
-
-	quoted = *p++ == '"';
-	begoff = expdest - stackblock();
-	p = argstr(p, argbackq, 0, NULL);
-	STPUTC('\0', expdest);
-	start = stackblock() + begoff;
-
-	q = grabstackstr(expdest);
-	result = arith(start);
-	ungrabstackstr(q, expdest);
-
-	start = stackblock() + begoff;
-	adj = start - expdest;
-	STADJUST(adj, expdest);
-
-	CHECKSTRSPACE((int)(DIGITS(result) + 1), expdest);
-	fmtstr(expdest, DIGITS(result), ARITH_FORMAT_STR, result);
-	adj = strlen(expdest);
-	STADJUST(adj, expdest);
-	/*
-	 * If this is quoted, a '-' must not indicate a range in [...].
-	 * If this is not quoted, splitting may occur.
-	 */
-	if (quoted ?
-	    result < 0 && begoff > 1 && flag & (EXP_GLOB | EXP_CASE) :
-	    flag & EXP_SPLIT)
-		reprocess(expdest - adj - stackblock(), flag, VSNORMAL, quoted,
-		    dst);
-	return p;
-}
-
-
-/*
- * Perform command substitution.
- */
-static void
-expbackq(union node *cmd, int quoted, int flag, struct worddest *dst)
-{
-	struct backcmd in;
-	int i;
-	char buf[128];
-	char *p;
-	char *dest = expdest;
-	char lastc;
-	char const *syntax = quoted? DQSYNTAX : BASESYNTAX;
-	int quotes = flag & (EXP_GLOB | EXP_CASE);
-	size_t nnl;
-	const char *ifs;
-	int startloc;
-
-	INTOFF;
-	p = grabstackstr(dest);
-	evalbackcmd(cmd, &in);
-	ungrabstackstr(p, dest);
-
-	p = in.buf;
-	startloc = dest - stackblock();
-	nnl = 0;
-	if (!quoted && flag & EXP_SPLIT)
-		ifs = ifsset() ? ifsval() : " \t\n";
-	else
-		ifs = "";
-	/* Remove trailing newlines */
-	for (;;) {
-		if (--in.nleft < 0) {
-			if (in.fd < 0)
-				break;
-			while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR)
-				;
-			TRACE(("expbackq: read returns %d\n", i));
-			if (i <= 0)
-				break;
-			p = buf;
-			in.nleft = i - 1;
-		}
-		lastc = *p++;
-		if (lastc == '\0')
-			continue;
-		if (nnl > 0 && lastc != '\n') {
-			NEXTWORD('\n', flag, dest, dst);
-			nnl = 0;
-		}
-		if (strchr(ifs, lastc) != NULL) {
-			if (lastc == '\n')
-				nnl++;
-			else
-				NEXTWORD(lastc, flag, dest, dst);
-		} else {
-			CHECKSTRSPACE(2, dest);
-			if (quotes && syntax[(int)lastc] == CCTL)
-				USTPUTC(CTLESC, dest);
-			USTPUTC(lastc, dest);
-		}
-	}
-	while (dest > stackblock() + startloc && STTOPC(dest) == '\n')
-		STUNPUTC(dest);
-
-	if (in.fd >= 0)
-		close(in.fd);
-	if (in.buf)
-		ckfree(in.buf);
-	if (in.jp) {
-		p = grabstackstr(dest);
-		exitstatus = waitforjob(in.jp, (int *)NULL);
-		ungrabstackstr(p, dest);
-	}
-	TRACE(("expbackq: done\n"));
-	expdest = dest;
-	INTON;
-}
-
-
-
-static void
-recordleft(const char *str, const char *loc, char *startp)
-{
-	int amount;
-
-	amount = ((str - 1) - (loc - startp)) - expdest;
-	STADJUST(amount, expdest);
-	while (loc != str - 1)
-		*startp++ = *loc++;
-}
-
-static const char *
-subevalvar_trim(const char *p, struct nodelist **restrict argbackq, int strloc,
-    int subtype, int startloc)
-{
-	char *startp;
-	char *loc = NULL;
-	char *str;
-	int c = 0;
-	int amount;
-
-	p = argstr(p, argbackq, EXP_CASE | EXP_TILDE, NULL);
-	STACKSTRNUL(expdest);
-	startp = stackblock() + startloc;
-	str = stackblock() + strloc;
-
-	switch (subtype) {
-	case VSTRIMLEFT:
-		for (loc = startp; loc < str; loc++) {
-			c = *loc;
-			*loc = '\0';
-			if (patmatch(str, startp)) {
-				*loc = c;
-				recordleft(str, loc, startp);
-				return p;
-			}
-			*loc = c;
-		}
-		break;
-
-	case VSTRIMLEFTMAX:
-		for (loc = str - 1; loc >= startp;) {
-			c = *loc;
-			*loc = '\0';
-			if (patmatch(str, startp)) {
-				*loc = c;
-				recordleft(str, loc, startp);
-				return p;
-			}
-			*loc = c;
-			loc--;
-		}
-		break;
-
-	case VSTRIMRIGHT:
-		for (loc = str - 1; loc >= startp;) {
-			if (patmatch(str, loc)) {
-				amount = loc - expdest;
-				STADJUST(amount, expdest);
-				return p;
-			}
-			loc--;
-		}
-		break;
-
-	case VSTRIMRIGHTMAX:
-		for (loc = startp; loc < str - 1; loc++) {
-			if (patmatch(str, loc)) {
-				amount = loc - expdest;
-				STADJUST(amount, expdest);
-				return p;
-			}
-		}
-		break;
-
-
-	default:
-		abort();
-	}
-	amount = (expdest - stackblock() - strloc) + 1;
-	STADJUST(-amount, expdest);
-	return p;
-}
-
-
-static const char *
-subevalvar_misc(const char *p, struct nodelist **restrict argbackq,
-    const char *var, int subtype, int startloc, int varflags)
-{
-	const char *end;
-	char *startp;
-	int amount;
-
-	end = argstr(p, argbackq, EXP_TILDE, NULL);
-	STACKSTRNUL(expdest);
-	startp = stackblock() + startloc;
-
-	switch (subtype) {
-	case VSASSIGN:
-		setvar(var, startp, 0);
-		amount = startp - expdest;
-		STADJUST(amount, expdest);
-		return end;
-
-	case VSQUESTION:
-		if (*p != CTLENDVAR) {
-			outfmt(out2, "%s\n", startp);
-			error((char *)NULL);
-		}
-		error("%.*s: parameter %snot set", (int)(p - var - 1),
-		      var, (varflags & VSNUL) ? "null or " : "");
-
-	default:
-		abort();
-	}
-}
-
-
-/*
- * Expand a variable, and return a pointer to the next character in the
- * input string.
- */
-
-static const char *
-evalvar(const char *p, struct nodelist **restrict argbackq, int flag,
-    struct worddest *dst)
-{
-	int subtype;
-	int varflags;
-	const char *var;
-	const char *val;
-	int patloc;
-	int c;
-	int set;
-	int special;
-	int startloc;
-	int varlen;
-	int varlenb;
-	char buf[21];
-
-	varflags = (unsigned char)*p++;
-	subtype = varflags & VSTYPE;
-	var = p;
-	special = 0;
-	if (! is_name(*p))
-		special = 1;
-	p = strchr(p, '=') + 1;
-	if (varflags & VSLINENO) {
-		set = 1;
-		special = 1;
-		val = NULL;
-	} else if (special) {
-		set = varisset(var, varflags & VSNUL);
-		val = NULL;
-	} else {
-		val = bltinlookup(var, 1);
-		if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
-			val = NULL;
-			set = 0;
-		} else
-			set = 1;
-	}
-	varlen = 0;
-	startloc = expdest - stackblock();
-	if (!set && uflag && *var != '@' && *var != '*') {
-		switch (subtype) {
-		case VSNORMAL:
-		case VSTRIMLEFT:
-		case VSTRIMLEFTMAX:
-		case VSTRIMRIGHT:
-		case VSTRIMRIGHTMAX:
-		case VSLENGTH:
-			error("%.*s: parameter not set", (int)(p - var - 1),
-			    var);
-		}
-	}
-	if (set && subtype != VSPLUS) {
-		/* insert the value of the variable */
-		if (special) {
-			if (varflags & VSLINENO) {
-				if (p - var > (ptrdiff_t)sizeof(buf))
-					abort();
-				memcpy(buf, var, p - var - 1);
-				buf[p - var - 1] = '\0';
-				strtodest(buf, flag, subtype,
-				    varflags & VSQUOTE, dst);
-			} else
-				varvalue(var, varflags & VSQUOTE, subtype, flag,
-				    dst);
-			if (subtype == VSLENGTH) {
-				varlenb = expdest - stackblock() - startloc;
-				varlen = varlenb;
-				if (localeisutf8) {
-					val = stackblock() + startloc;
-					for (;val != expdest; val++)
-						if ((*val & 0xC0) == 0x80)
-							varlen--;
-				}
-				STADJUST(-varlenb, expdest);
-			}
-		} else {
-			if (subtype == VSLENGTH) {
-				for (;*val; val++)
-					if (!localeisutf8 ||
-					    (*val & 0xC0) != 0x80)
-						varlen++;
-			}
-			else
-				strtodest(val, flag, subtype,
-				    varflags & VSQUOTE, dst);
-		}
-	}
-
-	if (subtype == VSPLUS)
-		set = ! set;
-
-	switch (subtype) {
-	case VSLENGTH:
-		cvtnum(varlen, buf);
-		strtodest(buf, flag, VSNORMAL, varflags & VSQUOTE, dst);
-		break;
-
-	case VSNORMAL:
-		return p;
-
-	case VSPLUS:
-	case VSMINUS:
-		if (!set) {
-			return argstr(p, argbackq,
-			    flag | (flag & EXP_SPLIT ? EXP_SPLIT_LIT : 0) |
-			    (varflags & VSQUOTE ? EXP_LIT_QUOTED : 0), dst);
-		}
-		break;
-
-	case VSTRIMLEFT:
-	case VSTRIMLEFTMAX:
-	case VSTRIMRIGHT:
-	case VSTRIMRIGHTMAX:
-		if (!set)
-			break;
-		/*
-		 * Terminate the string and start recording the pattern
-		 * right after it
-		 */
-		STPUTC('\0', expdest);
-		patloc = expdest - stackblock();
-		p = subevalvar_trim(p, argbackq, patloc, subtype, startloc);
-		reprocess(startloc, flag, VSNORMAL, varflags & VSQUOTE, dst);
-		if (flag & EXP_SPLIT && *var == '@' && varflags & VSQUOTE)
-			dst->state = WORD_QUOTEMARK;
-		return p;
-
-	case VSASSIGN:
-	case VSQUESTION:
-		if (!set) {
-			p = subevalvar_misc(p, argbackq, var, subtype,
-			    startloc, varflags);
-			/* assert(subtype == VSASSIGN); */
-			val = lookupvar(var);
-			strtodest(val, flag, subtype, varflags & VSQUOTE, dst);
-			return p;
-		}
-		break;
-
-	case VSERROR:
-		c = p - var - 1;
-		error("${%.*s%s}: Bad substitution", c, var,
-		    (c > 0 && *p != CTLENDVAR) ? "..." : "");
-
-	default:
-		abort();
-	}
-
-	{	/* skip to end of alternative */
-		int nesting = 1;
-		for (;;) {
-			if ((c = *p++) == CTLESC)
-				p++;
-			else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE))
-				*argbackq = (*argbackq)->next;
-			else if (c == CTLVAR) {
-				if ((*p++ & VSTYPE) != VSNORMAL)
-					nesting++;
-			} else if (c == CTLENDVAR) {
-				if (--nesting == 0)
-					break;
-			}
-		}
-	}
-	return p;
-}
-
-
-
-/*
- * Test whether a special or positional parameter is set.
- */
-
-static int
-varisset(const char *name, int nulok)
-{
-
-	if (*name == '!')
-		return backgndpidset();
-	else if (*name == '@' || *name == '*') {
-		if (*shellparam.p == NULL)
-			return 0;
-
-		if (nulok) {
-			char **av;
-
-			for (av = shellparam.p; *av; av++)
-				if (**av != '\0')
-					return 1;
-			return 0;
-		}
-	} else if (is_digit(*name)) {
-		char *ap;
-		long num;
-
-		errno = 0;
-		num = strtol(name, NULL, 10);
-		if (errno != 0 || num > shellparam.nparam)
-			return 0;
-
-		if (num == 0)
-			ap = arg0;
-		else
-			ap = shellparam.p[num - 1];
-
-		if (nulok && (ap == NULL || *ap == '\0'))
-			return 0;
-	}
-	return 1;
-}
-
-static void
-strtodest(const char *p, int flag, int subtype, int quoted,
-    struct worddest *dst)
-{
-	if (subtype == VSLENGTH || subtype == VSTRIMLEFT ||
-	    subtype == VSTRIMLEFTMAX || subtype == VSTRIMRIGHT ||
-	    subtype == VSTRIMRIGHTMAX)
-		STPUTS(p, expdest);
-	else if (flag & EXP_SPLIT && !quoted && dst != NULL)
-		STPUTS_SPLIT(p, BASESYNTAX, flag, expdest, dst);
-	else if (flag & (EXP_GLOB | EXP_CASE))
-		STPUTS_QUOTES(p, quoted ? DQSYNTAX : BASESYNTAX, expdest);
-	else
-		STPUTS(p, expdest);
-}
-
-static void
-reprocess(int startloc, int flag, int subtype, int quoted,
-    struct worddest *dst)
-{
-	static char *buf = NULL;
-	static size_t buflen = 0;
-	char *startp;
-	size_t len, zpos, zlen;
-
-	startp = stackblock() + startloc;
-	len = expdest - startp;
-	if (len >= SIZE_MAX / 2 || len > PTRDIFF_MAX)
-		abort();
-	INTOFF;
-	if (len >= buflen) {
-		ckfree(buf);
-		buf = NULL;
-	}
-	if (buflen < 128)
-		buflen = 128;
-	while (len >= buflen)
-		buflen <<= 1;
-	if (buf == NULL)
-		buf = ckmalloc(buflen);
-	INTON;
-	memcpy(buf, startp, len);
-	buf[len] = '\0';
-	STADJUST(-(ptrdiff_t)len, expdest);
-	for (zpos = 0;;) {
-		zlen = strlen(buf + zpos);
-		strtodest(buf + zpos, flag, subtype, quoted, dst);
-		zpos += zlen + 1;
-		if (zpos == len + 1)
-			break;
-		if (flag & EXP_SPLIT && (quoted || (zlen > 0 && zpos < len)))
-			NEXTWORD('\0', flag, expdest, dst);
-	}
-}
-
-/*
- * Add the value of a special or positional parameter to the stack string.
- */
-
-static void
-varvalue(const char *name, int quoted, int subtype, int flag,
-    struct worddest *dst)
-{
-	int num;
-	char *p;
-	int i;
-	int splitlater;
-	char sep[2];
-	char **ap;
-	char buf[(NSHORTOPTS > 10 ? NSHORTOPTS : 10) + 1];
-
-	if (subtype == VSLENGTH)
-		flag &= ~EXP_FULL;
-	splitlater = subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX ||
-		subtype == VSTRIMRIGHT || subtype == VSTRIMRIGHTMAX;
-
-	switch (*name) {
-	case '$':
-		num = rootpid;
-		break;
-	case '?':
-		num = oexitstatus;
-		break;
-	case '#':
-		num = shellparam.nparam;
-		break;
-	case '!':
-		num = backgndpidval();
-		break;
-	case '-':
-		p = buf;
-		for (i = 0 ; i < NSHORTOPTS ; i++) {
-			if (optval[i])
-				*p++ = optletter[i];
-		}
-		*p = '\0';
-		strtodest(buf, flag, subtype, quoted, dst);
-		return;
-	case '@':
-		if (flag & EXP_SPLIT && quoted) {
-			for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
-				strtodest(p, flag, subtype, quoted, dst);
-				if (*ap) {
-					if (splitlater)
-						STPUTC('\0', expdest);
-					else
-						NEXTWORD('\0', flag, expdest,
-						    dst);
-				}
-			}
-			if (shellparam.nparam > 0)
-				dst->state = WORD_QUOTEMARK;
-			return;
-		}
-		/* FALLTHROUGH */
-	case '*':
-		if (ifsset())
-			sep[0] = ifsval()[0];
-		else
-			sep[0] = ' ';
-		sep[1] = '\0';
-		for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
-			strtodest(p, flag, subtype, quoted, dst);
-			if (!*ap)
-				break;
-			if (sep[0])
-				strtodest(sep, flag, subtype, quoted, dst);
-			else if (flag & EXP_SPLIT && !quoted && **ap != '\0') {
-				if (splitlater)
-					STPUTC('\0', expdest);
-				else
-					NEXTWORD('\0', flag, expdest, dst);
-			}
-		}
-		return;
-	default:
-		if (is_digit(*name)) {
-			num = atoi(name);
-			if (num == 0)
-				p = arg0;
-			else if (num > 0 && num <= shellparam.nparam)
-				p = shellparam.p[num - 1];
-			else
-				return;
-			strtodest(p, flag, subtype, quoted, dst);
-		}
-		return;
-	}
-	cvtnum(num, buf);
-	strtodest(buf, flag, subtype, quoted, dst);
-}
-
-
-
-static char expdir[PATH_MAX];
-#define expdir_end (expdir + sizeof(expdir))
-
-/*
- * Perform pathname generation and remove control characters.
- * At this point, the only control characters should be CTLESC.
- * The results are stored in the list dstlist.
- */
-static void
-expandmeta(char *pattern, struct arglist *dstlist)
-{
-	char *p;
-	int firstmatch;
-	char c;
-
-	firstmatch = dstlist->count;
-	p = pattern;
-	for (; (c = *p) != '\0'; p++) {
-		/* fast check for meta chars */
-		if (c == '*' || c == '?' || c == '[') {
-			INTOFF;
-			expmeta(expdir, pattern, dstlist);
-			INTON;
-			break;
-		}
-	}
-	if (dstlist->count == firstmatch) {
-		/*
-		 * no matches
-		 */
-		rmescapes(pattern);
-		appendarglist(dstlist, pattern);
-	} else {
-		qsort(&dstlist->args[firstmatch],
-		    dstlist->count - firstmatch,
-		    sizeof(dstlist->args[0]), expsortcmp);
-	}
-}
-
-
-/*
- * Do metacharacter (i.e. *, ?, [...]) expansion.
- */
-
-static void
-expmeta(char *enddir, char *name, struct arglist *arglist)
-{
-	const char *p;
-	const char *q;
-	const char *start;
-	char *endname;
-	int metaflag;
-	struct stat statb;
-	DIR *dirp;
-	struct dirent *dp;
-	int atend;
-	int matchdot;
-	int esc;
-	int namlen;
-
-	metaflag = 0;
-	start = name;
-	for (p = name; esc = 0, *p; p += esc + 1) {
-		if (*p == '*' || *p == '?')
-			metaflag = 1;
-		else if (*p == '[') {
-			q = p + 1;
-			if (*q == '!' || *q == '^')
-				q++;
-			for (;;) {
-				if (*q == CTLESC)
-					q++;
-				if (*q == '/' || *q == '\0')
-					break;
-				if (*++q == ']') {
-					metaflag = 1;
-					break;
-				}
-			}
-		} else if (*p == '\0')
-			break;
-		else {
-			if (*p == CTLESC)
-				esc++;
-			if (p[esc] == '/') {
-				if (metaflag)
-					break;
-				start = p + esc + 1;
-			}
-		}
-	}
-	if (metaflag == 0) {	/* we've reached the end of the file name */
-		if (enddir != expdir)
-			metaflag++;
-		for (p = name ; ; p++) {
-			if (*p == CTLESC)
-				p++;
-			*enddir++ = *p;
-			if (*p == '\0')
-				break;
-			if (enddir == expdir_end)
-				return;
-		}
-		if (metaflag == 0 || lstat(expdir, &statb) >= 0)
-			appendarglist(arglist, stsavestr(expdir));
-		return;
-	}
-	endname = name + (p - name);
-	if (start != name) {
-		p = name;
-		while (p < start) {
-			if (*p == CTLESC)
-				p++;
-			*enddir++ = *p++;
-			if (enddir == expdir_end)
-				return;
-		}
-	}
-	if (enddir == expdir) {
-		p = ".";
-	} else if (enddir == expdir + 1 && *expdir == '/') {
-		p = "/";
-	} else {
-		p = expdir;
-		enddir[-1] = '\0';
-	}
-	if ((dirp = opendir(p)) == NULL)
-		return;
-	if (enddir != expdir)
-		enddir[-1] = '/';
-	if (*endname == 0) {
-		atend = 1;
-	} else {
-		atend = 0;
-		*endname = '\0';
-		endname += esc + 1;
-	}
-	matchdot = 0;
-	p = start;
-	if (*p == CTLESC)
-		p++;
-	if (*p == '.')
-		matchdot++;
-	while (! int_pending() && (dp = readdir(dirp)) != NULL) {
-		if (dp->d_name[0] == '.' && ! matchdot)
-			continue;
-		if (patmatch(start, dp->d_name)) {
-			namlen = dp->d_namlen;
-			if (enddir + namlen + 1 > expdir_end)
-				continue;
-			memcpy(enddir, dp->d_name, namlen + 1);
-			if (atend)
-				appendarglist(arglist, stsavestr(expdir));
-			else {
-				if (dp->d_type != DT_UNKNOWN &&
-				    dp->d_type != DT_DIR &&
-				    dp->d_type != DT_LNK)
-					continue;
-				if (enddir + namlen + 2 > expdir_end)
-					continue;
-				enddir[namlen] = '/';
-				enddir[namlen + 1] = '\0';
-				expmeta(enddir + namlen + 1, endname, arglist);
-			}
-		}
-	}
-	closedir(dirp);
-	if (! atend)
-		endname[-esc - 1] = esc ? CTLESC : '/';
-}
-
-
-static int
-expsortcmp(const void *p1, const void *p2)
-{
-	const char *s1 = *(const char * const *)p1;
-	const char *s2 = *(const char * const *)p2;
-
-	return (strcoll(s1, s2));
-}
-
-
-
-static wchar_t
-get_wc(const char **p)
-{
-	wchar_t c;
-	int chrlen;
-
-	chrlen = mbtowc(&c, *p, 4);
-	if (chrlen == 0)
-		return 0;
-	else if (chrlen == -1)
-		c = 0;
-	else
-		*p += chrlen;
-	return c;
-}
-
-
-/*
- * See if a character matches a character class, starting at the first colon
- * of "[:class:]".
- * If a valid character class is recognized, a pointer to the next character
- * after the final closing bracket is stored into *end, otherwise a null
- * pointer is stored into *end.
- */
-static int
-match_charclass(const char *p, wchar_t chr, const char **end)
-{
-	char name[20];
-	const char *nameend;
-	wctype_t cclass;
-
-	*end = NULL;
-	p++;
-	nameend = strstr(p, ":]");
-	if (nameend == NULL || (size_t)(nameend - p) >= sizeof(name) ||
-	    nameend == p)
-		return 0;
-	memcpy(name, p, nameend - p);
-	name[nameend - p] = '\0';
-	*end = nameend + 2;
-	cclass = wctype(name);
-	/* An unknown class matches nothing but is valid nevertheless. */
-	if (cclass == 0)
-		return 0;
-	return iswctype(chr, cclass);
-}
-
-
-/*
- * Returns true if the pattern matches the string.
- */
-
-static int
-patmatch(const char *pattern, const char *string)
-{
-	const char *p, *q, *end;
-	const char *bt_p, *bt_q;
-	char c;
-	wchar_t wc, wc2;
-
-	p = pattern;
-	q = string;
-	bt_p = NULL;
-	bt_q = NULL;
-	for (;;) {
-		switch (c = *p++) {
-		case '\0':
-			if (*q != '\0')
-				goto backtrack;
-			return 1;
-		case CTLESC:
-			if (*q++ != *p++)
-				goto backtrack;
-			break;
-		case '?':
-			if (*q == '\0')
-				return 0;
-			if (localeisutf8) {
-				wc = get_wc(&q);
-				/*
-				 * A '?' does not match invalid UTF-8 but a
-				 * '*' does, so backtrack.
-				 */
-				if (wc == 0)
-					goto backtrack;
-			} else
-				q++;
-			break;
-		case '*':
-			c = *p;
-			while (c == '*')
-				c = *++p;
-			/*
-			 * If the pattern ends here, we know the string
-			 * matches without needing to look at the rest of it.
-			 */
-			if (c == '\0')
-				return 1;
-			/*
-			 * First try the shortest match for the '*' that
-			 * could work. We can forget any earlier '*' since
-			 * there is no way having it match more characters
-			 * can help us, given that we are already here.
-			 */
-			bt_p = p;
-			bt_q = q;
-			break;
-		case '[': {
-			const char *savep, *saveq;
-			int invert, found;
-			wchar_t chr;
-
-			savep = p, saveq = q;
-			invert = 0;
-			if (*p == '!' || *p == '^') {
-				invert++;
-				p++;
-			}
-			found = 0;
-			if (*q == '\0')
-				return 0;
-			if (localeisutf8) {
-				chr = get_wc(&q);
-				if (chr == 0)
-					goto backtrack;
-			} else
-				chr = (unsigned char)*q++;
-			c = *p++;
-			do {
-				if (c == '\0') {
-					p = savep, q = saveq;
-					c = '[';
-					goto dft;
-				}
-				if (c == '[' && *p == ':') {
-					found |= match_charclass(p, chr, &end);
-					if (end != NULL) {
-						p = end;
-						continue;
-					}
-				}
-				if (c == CTLESC)
-					c = *p++;
-				if (localeisutf8 && c & 0x80) {
-					p--;
-					wc = get_wc(&p);
-					if (wc == 0) /* bad utf-8 */
-						return 0;
-				} else
-					wc = (unsigned char)c;
-				if (*p == '-' && p[1] != ']') {
-					p++;
-					if (*p == CTLESC)
-						p++;
-					if (localeisutf8) {
-						wc2 = get_wc(&p);
-						if (wc2 == 0) /* bad utf-8 */
-							return 0;
-					} else
-						wc2 = (unsigned char)*p++;
-					if (   collate_range_cmp(chr, wc) >= 0
-					    && collate_range_cmp(chr, wc2) <= 0
-					   )
-						found = 1;
-				} else {
-					if (chr == wc)
-						found = 1;
-				}
-			} while ((c = *p++) != ']');
-			if (found == invert)
-				goto backtrack;
-			break;
-		}
-dft:	        default:
-			if (*q == '\0')
-				return 0;
-			if (*q++ == c)
-				break;
-backtrack:
-			/*
-			 * If we have a mismatch (other than hitting the end
-			 * of the string), go back to the last '*' seen and
-			 * have it match one additional character.
-			 */
-			if (bt_p == NULL)
-				return 0;
-			if (*bt_q == '\0')
-				return 0;
-			bt_q++;
-			p = bt_p;
-			q = bt_q;
-			break;
-		}
-	}
-}
-
-
-
-/*
- * Remove any CTLESC and CTLQUOTEMARK characters from a string.
- */
-
-void
-rmescapes(char *str)
-{
-	char *p, *q;
-
-	p = str;
-	while (*p != CTLESC && *p != CTLQUOTEMARK && *p != CTLQUOTEEND) {
-		if (*p++ == '\0')
-			return;
-	}
-	q = p;
-	while (*p) {
-		if (*p == CTLQUOTEMARK || *p == CTLQUOTEEND) {
-			p++;
-			continue;
-		}
-		if (*p == CTLESC)
-			p++;
-		*q++ = *p++;
-	}
-	*q = '\0';
-}
-
-
-
-/*
- * See if a pattern matches in a case statement.
- */
-
-int
-casematch(union node *pattern, const char *val)
-{
-	struct stackmark smark;
-	struct nodelist *argbackq;
-	int result;
-	char *p;
-
-	setstackmark(&smark);
-	argbackq = pattern->narg.backquote;
-	STARTSTACKSTR(expdest);
-	argstr(pattern->narg.text, &argbackq, EXP_TILDE | EXP_CASE, NULL);
-	STPUTC('\0', expdest);
-	p = grabstackstr(expdest);
-	result = patmatch(p, val);
-	popstackmark(&smark);
-	return result;
-}
-
-/*
- * Our own itoa().
- */
-
-static void
-cvtnum(int num, char *buf)
-{
-	char temp[32];
-	int neg = num < 0;
-	char *p = temp + 31;
-
-	temp[31] = '\0';
-
-	do {
-		*--p = num % 10 + '0';
-	} while ((num /= 10) != 0);
-
-	if (neg)
-		*--p = '-';
-
-	memcpy(buf, p, temp + 32 - p);
-}
-
-/*
- * Do most of the work for wordexp(3).
- */
-
-int
-wordexpcmd(int argc, char **argv)
-{
-	size_t len;
-	int i;
-
-	out1fmt("%08x", argc - 1);
-	for (i = 1, len = 0; i < argc; i++)
-		len += strlen(argv[i]);
-	out1fmt("%08x", (int)len);
-	for (i = 1; i < argc; i++)
-		outbin(argv[i], strlen(argv[i]) + 1, out1);
-        return (0);
-}
-
-/*
- * Do most of the work for wordexp(3), new version.
- */
-
-int
-freebsd_wordexpcmd(int argc __unused, char **argv __unused)
-{
-	struct arglist arglist;
-	union node *args, *n;
-	size_t len;
-	int ch;
-	int protected = 0;
-	int fd = -1;
-	int i;
-
-	while ((ch = nextopt("f:p")) != '\0') {
-		switch (ch) {
-		case 'f':
-			fd = number(shoptarg);
-			break;
-		case 'p':
-			protected = 1;
-			break;
-		}
-	}
-	if (*argptr != NULL)
-		error("wrong number of arguments");
-	if (fd < 0)
-		error("missing fd");
-	INTOFF;
-	setinputfd(fd, 1);
-	INTON;
-	args = parsewordexp();
-	popfile(); /* will also close fd */
-	if (protected)
-		for (n = args; n != NULL; n = n->narg.next) {
-			if (n->narg.backquote != NULL) {
-				outcslow('C', out1);
-				error("command substitution disabled");
-			}
-		}
-	outcslow(' ', out1);
-	emptyarglist(&arglist);
-	for (n = args; n != NULL; n = n->narg.next)
-		expandarg(n, &arglist, EXP_FULL | EXP_TILDE);
-	for (i = 0, len = 0; i < arglist.count; i++)
-		len += strlen(arglist.args[i]);
-	out1fmt("%016x %016zx", arglist.count, len);
-	for (i = 0; i < arglist.count; i++)
-		outbin(arglist.args[i], strlen(arglist.args[i]) + 1, out1);
-	return (0);
-}