Flatten vendor/tcsh/dist.

1 files changed, 0 insertions, 1171 deletions

diff --git a/contrib/tcsh/sh.exec.c b/contrib/tcsh/sh.exec.c
deleted file mode 100644
index d5a80fe..0000000
--- a/contrib/tcsh/sh.exec.c
+++ /dev/null
@@ -1,1171 +0,0 @@
-/* $Header: /p/tcsh/cvsroot/tcsh/sh.exec.c,v 3.73 2006/08/24 20:56:31 christos Exp $ */
-/*
- * sh.exec.c: Search, find, and execute a command!
- */
-/*-
- * Copyright (c) 1980, 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * 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 "sh.h"
-
-RCSID("$tcsh: sh.exec.c,v 3.73 2006/08/24 20:56:31 christos Exp $")
-
-#include "tc.h"
-#include "tw.h"
-#ifdef WINNT_NATIVE
-#include <nt.const.h>
-#endif /*WINNT_NATIVE*/
-
-/*
- * C shell
- */
-
-#ifndef OLDHASH
-# define FASTHASH	/* Fast hashing is the default */
-#endif /* OLDHASH */
-
-/*
- * System level search and execute of a command.
- * We look in each directory for the specified command name.
- * If the name contains a '/' then we execute only the full path name.
- * If there is no search path then we execute only full path names.
- */
-
-/*
- * As we search for the command we note the first non-trivial error
- * message for presentation to the user.  This allows us often
- * to show that a file has the wrong mode/no access when the file
- * is not in the last component of the search path, so we must
- * go on after first detecting the error.
- */
-static char *exerr;		/* Execution error message */
-static Char *expath;		/* Path for exerr */
-
-/*
- * The two part hash function is designed to let texec() call the
- * more expensive hashname() only once and the simple hash() several
- * times (once for each path component checked).
- * Byte size is assumed to be 8.
- */
-#define BITS_PER_BYTE	8
-
-#ifdef FASTHASH
-/*
- * xhash is an array of hash buckets which are used to hash execs.  If
- * it is allocated (havhash true), then to tell if ``name'' is
- * (possibly) presend in the i'th component of the variable path, look
- * at the [hashname(name)] bucket of size [hashwidth] bytes, in the [i
- * mod size*8]'th bit.  The cache size is defaults to a length of 1024
- * buckets, each 1 byte wide.  This implementation guarantees that
- * objects n bytes wide will be aligned on n byte boundaries.
- */
-# define HSHMUL		241
-
-static unsigned long *xhash = NULL;
-static unsigned int hashlength = 0, uhashlength = 0;
-static unsigned int hashwidth = 0, uhashwidth = 0;
-static int hashdebug = 0;
-
-# define hash(a, b)	(((a) * HSHMUL + (b)) % (hashlength))
-# define widthof(t)	(sizeof(t) * BITS_PER_BYTE)
-# define tbit(f, i, t)	(((t *) xhash)[(f)] &  \
-			 (1UL << (i & (widthof(t) - 1))))
-# define tbis(f, i, t)	(((t *) xhash)[(f)] |= \
-			 (1UL << (i & (widthof(t) - 1))))
-# define cbit(f, i)	tbit(f, i, unsigned char)
-# define cbis(f, i)	tbis(f, i, unsigned char)
-# define sbit(f, i)	tbit(f, i, unsigned short)
-# define sbis(f, i)	tbis(f, i, unsigned short)
-# define ibit(f, i)	tbit(f, i, unsigned int)
-# define ibis(f, i)	tbis(f, i, unsigned int)
-# define lbit(f, i)	tbit(f, i, unsigned long)
-# define lbis(f, i)	tbis(f, i, unsigned long)
-
-# define bit(f, i) (hashwidth==sizeof(unsigned char)  ? cbit(f,i) : \
- 		    ((hashwidth==sizeof(unsigned short) ? sbit(f,i) : \
-		     ((hashwidth==sizeof(unsigned int)   ? ibit(f,i) : \
-		     lbit(f,i))))))
-# define bis(f, i) (hashwidth==sizeof(unsigned char)  ? cbis(f,i) : \
- 		    ((hashwidth==sizeof(unsigned short) ? sbis(f,i) : \
-		     ((hashwidth==sizeof(unsigned int)   ? ibis(f,i) : \
-		     lbis(f,i))))))
-#else /* OLDHASH */
-/*
- * Xhash is an array of HSHSIZ bits (HSHSIZ / 8 chars), which are used
- * to hash execs.  If it is allocated (havhash true), then to tell
- * whether ``name'' is (possibly) present in the i'th component
- * of the variable path, you look at the bit in xhash indexed by
- * hash(hashname("name"), i).  This is setup automatically
- * after .login is executed, and recomputed whenever ``path'' is
- * changed.
- */
-# define HSHSIZ		8192	/* 1k bytes */
-# define HSHMASK		(HSHSIZ - 1)
-# define HSHMUL		243
-static char xhash[HSHSIZ / BITS_PER_BYTE];
-
-# define hash(a, b)	(((a) * HSHMUL + (b)) & HSHMASK)
-# define bit(h, b)	((h)[(b) >> 3] & 1 << ((b) & 7))	/* bit test */
-# define bis(h, b)	((h)[(b) >> 3] |= 1 << ((b) & 7))	/* bit set */
-
-#endif /* FASTHASH */
-
-#ifdef VFORK
-static int hits, misses;
-#endif /* VFORK */
-
-/* Dummy search path for just absolute search when no path */
-static Char *justabs[] = {STRNULL, 0};
-
-static	void	pexerr		(void);
-static	void	texec		(Char *, Char **);
-int	hashname	(Char *);
-static	int 	iscommand	(Char *);
-
-void
-doexec(struct command *t, int do_glob)
-{
-    Char *dp, **pv, **av, *sav;
-    struct varent *v;
-    int slash, gflag;
-    int hashval, i;
-    Char   *blk[2];
-
-    /*
-     * Glob the command name. We will search $path even if this does something,
-     * as in sh but not in csh.  One special case: if there is no PATH, then we
-     * execute only commands which start with '/'.
-     */
-    blk[0] = t->t_dcom[0];
-    blk[1] = 0;
-    gflag = 0;
-    if (do_glob)
-	gflag = tglob(blk);
-    if (gflag) {
-	pv = globall(blk, gflag);
-	if (pv == 0) {
-	    setname(short2str(blk[0]));
-	    stderror(ERR_NAME | ERR_NOMATCH);
-	}
-    }
-    else
-	pv = saveblk(blk);
-    cleanup_push(pv, blk_cleanup);
-
-    trim(pv);
-
-    exerr = 0;
-    expath = Strsave(pv[0]);
-#ifdef VFORK
-    Vexpath = expath;
-#endif /* VFORK */
-
-    v = adrof(STRpath);
-    if (v == 0 && expath[0] != '/' && expath[0] != '.')
-	pexerr();
-    slash = any(short2str(expath), '/');
-
-    /*
-     * Glob the argument list, if necessary. Otherwise trim off the quote bits.
-     */
-    gflag = 0;
-    av = &t->t_dcom[1];
-    if (do_glob)
-	gflag = tglob(av);
-    if (gflag) {
-	av = globall(av, gflag);
-	if (av == 0) {
-	    setname(short2str(expath));
-	    stderror(ERR_NAME | ERR_NOMATCH);
-	}
-    }
-    else
-	av = saveblk(av);
-
-    blkfree(t->t_dcom);
-    cleanup_ignore(pv);
-    cleanup_until(pv);
-    t->t_dcom = blkspl(pv, av);
-    xfree(pv);
-    xfree(av);
-    av = t->t_dcom;
-    trim(av);
-
-    if (*av == NULL || **av == '\0')
-	pexerr();
-
-    xechoit(av);		/* Echo command if -x */
-#ifdef CLOSE_ON_EXEC
-    /*
-     * Since all internal file descriptors are set to close on exec, we don't
-     * need to close them explicitly here.  Just reorient ourselves for error
-     * messages.
-     */
-    SHIN = 0;
-    SHOUT = 1;
-    SHDIAG = 2;
-    OLDSTD = 0;
-    isoutatty = isatty(SHOUT);
-    isdiagatty = isatty(SHDIAG);
-#else
-    closech();			/* Close random fd's */
-#endif
-    /*
-     * We must do this AFTER any possible forking (like `foo` in glob) so that
-     * this shell can still do subprocesses.
-     */
-    {
-	sigset_t set;
-	sigemptyset(&set);
-	sigaddset(&set, SIGINT);
-	sigaddset(&set, SIGCHLD);
-	sigprocmask(SIG_UNBLOCK, &set, NULL);
-    }
-    pintr_disabled = 0;
-    pchild_disabled = 0;
-
-    /*
-     * If no path, no words in path, or a / in the filename then restrict the
-     * command search.
-     */
-    if (v == NULL || v->vec == NULL || v->vec[0] == NULL || slash)
-	pv = justabs;
-    else
-	pv = v->vec;
-    sav = Strspl(STRslash, *av);/* / command name for postpending */
-#ifndef VFORK
-    cleanup_push(sav, xfree);
-#else /* VFORK */
-    Vsav = sav;
-#endif /* VFORK */
-    hashval = havhash ? hashname(*av) : 0;
-
-    i = 0;
-#ifdef VFORK
-    hits++;
-#endif /* VFORK */
-    do {
-	/*
-	 * Try to save time by looking at the hash table for where this command
-	 * could be.  If we are doing delayed hashing, then we put the names in
-	 * one at a time, as the user enters them.  This is kinda like Korn
-	 * Shell's "tracked aliases".
-	 */
-	if (!slash && ABSOLUTEP(pv[0]) && havhash) {
-#ifdef FASTHASH
-	    if (!bit(hashval, i))
-		goto cont;
-#else /* OLDHASH */
-	    int hashval1 = hash(hashval, i);
-	    if (!bit(xhash, hashval1))
-		goto cont;
-#endif /* FASTHASH */
-	}
-	if (pv[0][0] == 0 || eq(pv[0], STRdot))	/* don't make ./xxx */
-	    texec(*av, av);
-	else {
-	    dp = Strspl(*pv, sav);
-#ifndef VFORK
-	    cleanup_push(dp, xfree);
-#else /* VFORK */
-	    Vdp = dp;
-#endif /* VFORK */
-
-	    texec(dp, av);
-#ifndef VFORK
-	    cleanup_until(dp);
-#else /* VFORK */
-	    Vdp = 0;
-	    xfree(dp);
-#endif /* VFORK */
-	}
-#ifdef VFORK
-	misses++;
-#endif /* VFORK */
-cont:
-	pv++;
-	i++;
-    } while (*pv);
-#ifdef VFORK
-    hits--;
-#endif /* VFORK */
-#ifndef VFORK
-    cleanup_until(sav);
-#else /* VFORK */
-    Vsav = 0;
-    xfree(sav);
-#endif /* VFORK */
-    pexerr();
-}
-
-static void
-pexerr(void)
-{
-    /* Couldn't find the damn thing */
-    if (expath) {
-	setname(short2str(expath));
-#ifdef VFORK
-	Vexpath = 0;
-#endif /* VFORK */
-	xfree(expath);
-	expath = 0;
-    }
-    else
-	setname("");
-    if (exerr)
-	stderror(ERR_NAME | ERR_STRING, exerr);
-    stderror(ERR_NAME | ERR_COMMAND);
-}
-
-/*
- * Execute command f, arg list t.
- * Record error message if not found.
- * Also do shell scripts here.
- */
-static void
-texec(Char *sf, Char **st)
-{
-    char **t;
-    char *f;
-    struct varent *v;
-    Char  **vp;
-    Char   *lastsh[2];
-    char    pref[2];
-    int     fd;
-    Char   *st0, **ost;
-
-    /* The order for the conversions is significant */
-    t = short2blk(st);
-    f = short2str(sf);
-#ifdef VFORK
-    Vt = t;
-#endif /* VFORK */
-    errno = 0;			/* don't use a previous error */
-#ifdef apollo
-    /*
-     * If we try to execute an nfs mounted directory on the apollo, we
-     * hang forever. So until apollo fixes that..
-     */
-    {
-	struct stat stb;
-	if (stat(f, &stb) == 0 && S_ISDIR(stb.st_mode))
-	    errno = EISDIR;
-    }
-    if (errno == 0)
-#endif /* apollo */
-    {
-#ifdef ISC_POSIX_EXEC_BUG
-	__setostype(0);		/* "0" is "__OS_SYSV" in <sys/user.h> */
-#endif /* ISC_POSIX_EXEC_BUG */
-	(void) execv(f, t);
-#ifdef ISC_POSIX_EXEC_BUG
-	__setostype(1);		/* "1" is "__OS_POSIX" in <sys/user.h> */
-#endif /* ISC_POSIX_EXEC_BUG */
-    }
-#ifdef VFORK
-    Vt = 0;
-#endif /* VFORK */
-    blkfree((Char **) t);
-    switch (errno) {
-
-    case ENOEXEC:
-#ifdef WINNT_NATIVE
-		nt_feed_to_cmd(f,t);
-#endif /* WINNT_NATIVE */
-	/*
-	 * From: casper@fwi.uva.nl (Casper H.S. Dik) If we could not execute
-	 * it, don't feed it to the shell if it looks like a binary!
-	 */
-	if ((fd = xopen(f, O_RDONLY|O_LARGEFILE)) != -1) {
-	    int nread;
-#ifdef O_TEXT
-	    setmode(fd, O_TEXT);
-#endif
-	    if ((nread = xread(fd, pref, 2)) == 2) {
-		if (!isprint((unsigned char)pref[0]) &&
-		    (pref[0] != '\n' && pref[0] != '\t')) {
-		    int err;
-
-		    err = errno;
-		    xclose(fd);
-		    /*
-		     * We *know* what ENOEXEC means.
-		     */
-		    stderror(ERR_ARCH, f, strerror(err));
-		}
-	    }
-	    else if (nread < 0) {
-#ifdef convex
-		int err;
-
-		err = errno;
-		xclose(fd);
-		/* need to print error incase the file is migrated */
-		stderror(ERR_SYSTEM, f, strerror(err));
-#endif
-	    }
-#ifdef _PATH_BSHELL
-	    else {
-		pref[0] = '#';
-		pref[1] = '\0';
-	    }
-#endif
-	}
-#ifdef HASHBANG
-	if (fd == -1 ||
-	    pref[0] != '#' || pref[1] != '!' || hashbang(fd, &vp) == -1) {
-#endif /* HASHBANG */
-	/*
-	 * If there is an alias for shell, then put the words of the alias in
-	 * front of the argument list replacing the command name. Note no
-	 * interpretation of the words at this point.
-	 */
-	    v = adrof1(STRshell, &aliases);
-	    if (v == NULL || v->vec == NULL) {
-		vp = lastsh;
-		vp[0] = adrof(STRshell) ? varval(STRshell) : STR_SHELLPATH;
-		vp[1] = NULL;
-#ifdef _PATH_BSHELL
-		if (fd != -1 
-# ifndef ISC	/* Compatible with ISC's /bin/csh */
-		    && pref[0] != '#'
-# endif /* ISC */
-		    )
-		    vp[0] = STR_BSHELL;
-#endif
-		vp = saveblk(vp);
-	    }
-	    else
-		vp = saveblk(v->vec);
-#ifdef HASHBANG
-	}
-#endif /* HASHBANG */
-	if (fd != -1)
-	    xclose(fd);
-
-	st0 = st[0];
-	st[0] = sf;
-	ost = st;
-	st = blkspl(vp, st);	/* Splice up the new arglst */
-	ost[0] = st0;
-	sf = *st;
-	/* The order for the conversions is significant */
-	t = short2blk(st);
-	f = short2str(sf);
-	xfree(st);
-	blkfree((Char **) vp);
-#ifdef VFORK
-	Vt = t;
-#endif /* VFORK */
-#ifdef ISC_POSIX_EXEC_BUG
-	__setostype(0);		/* "0" is "__OS_SYSV" in <sys/user.h> */
-#endif /* ISC_POSIX_EXEC_BUG */
-	(void) execv(f, t);
-#ifdef ISC_POSIX_EXEC_BUG
-	__setostype(1);		/* "1" is "__OS_POSIX" in <sys/user.h> */
-#endif /* ISC_POSIX_EXEC_BUG */
-#ifdef VFORK
-	Vt = 0;
-#endif /* VFORK */
-	blkfree((Char **) t);
-	/* The sky is falling, the sky is falling! */
-	stderror(ERR_SYSTEM, f, strerror(errno));
-	break;
-
-    case ENOMEM:
-	stderror(ERR_SYSTEM, f, strerror(errno));
-	break;
-
-#ifdef _IBMR2
-    case 0:			/* execv fails and returns 0! */
-#endif /* _IBMR2 */
-    case ENOENT:
-	break;
-
-    default:
-	if (exerr == 0) {
-	    exerr = strerror(errno);
-	    xfree(expath);
-	    expath = Strsave(sf);
-#ifdef VFORK
-	    Vexpath = expath;
-#endif /* VFORK */
-	}
-	break;
-    }
-}
-
-struct execash_state
-{
-    int saveIN, saveOUT, saveDIAG, saveSTD;
-    int SHIN, SHOUT, SHDIAG, OLDSTD;
-    int didfds;
-#ifndef CLOSE_ON_EXEC
-    int didcch;
-#endif
-    struct sigaction sigint, sigquit, sigterm;
-};
-
-static void
-execash_cleanup(void *xstate)
-{
-    struct execash_state *state;
-
-    state = xstate;
-    sigaction(SIGINT, &state->sigint, NULL);
-    sigaction(SIGQUIT, &state->sigquit, NULL);
-    sigaction(SIGTERM, &state->sigterm, NULL);
-
-    doneinp = 0;
-#ifndef CLOSE_ON_EXEC
-    didcch = state->didcch;
-#endif /* CLOSE_ON_EXEC */
-    didfds = state->didfds;
-    xclose(SHIN);
-    xclose(SHOUT);
-    xclose(SHDIAG);
-    xclose(OLDSTD);
-    close_on_exec(SHIN = dmove(state->saveIN, state->SHIN), 1);
-    close_on_exec(SHOUT = dmove(state->saveOUT, state->SHOUT), 1);
-    close_on_exec(SHDIAG = dmove(state->saveDIAG, state->SHDIAG), 1);
-    close_on_exec(OLDSTD = dmove(state->saveSTD, state->OLDSTD), 1);
-}
-
-/*ARGSUSED*/
-void
-execash(Char **t, struct command *kp)
-{
-    struct execash_state state;
-
-    USE(t);
-    if (chkstop == 0 && setintr)
-	panystop(0);
-    /*
-     * Hmm, we don't really want to do that now because we might
-     * fail, but what is the choice
-     */
-    rechist(NULL, adrof(STRsavehist) != NULL);
-
-
-    sigaction(SIGINT, &parintr, &state.sigint);
-    sigaction(SIGQUIT, &parintr, &state.sigquit);
-    sigaction(SIGTERM, &parterm, &state.sigterm);
-
-    state.didfds = didfds;
-#ifndef CLOSE_ON_EXEC
-    state.didcch = didcch;
-#endif /* CLOSE_ON_EXEC */
-    state.SHIN = SHIN;
-    state.SHOUT = SHOUT;
-    state.SHDIAG = SHDIAG;
-    state.OLDSTD = OLDSTD;
-
-    (void)close_on_exec (state.saveIN = dcopy(SHIN, -1), 1);
-    (void)close_on_exec (state.saveOUT = dcopy(SHOUT, -1), 1);
-    (void)close_on_exec (state.saveDIAG = dcopy(SHDIAG, -1), 1);
-    (void)close_on_exec (state.saveSTD = dcopy(OLDSTD, -1), 1);
-
-    lshift(kp->t_dcom, 1);
-
-    (void)close_on_exec (SHIN = dcopy(0, -1), 1);
-    (void)close_on_exec (SHOUT = dcopy(1, -1), 1);
-    (void)close_on_exec (SHDIAG = dcopy(2, -1), 1);
-#ifndef CLOSE_ON_EXEC
-    didcch = 0;
-#endif /* CLOSE_ON_EXEC */
-    didfds = 0;
-    cleanup_push(&state, execash_cleanup);
-
-    /*
-     * Decrement the shell level
-     */
-    shlvl(-1);
-#ifdef WINNT_NATIVE
-    __nt_really_exec=1;
-#endif /* WINNT_NATIVE */
-    doexec(kp, 1);
-
-    cleanup_until(&state);
-}
-
-void
-xechoit(Char **t)
-{
-    if (adrof(STRecho)) {
-	int odidfds = didfds;
-	flush();
-	haderr = 1;
-	didfds = 0;
-	blkpr(t), xputchar('\n');
-	flush();
-	didfds = odidfds;
-	haderr = 0;
-    }
-}
-
-/*ARGSUSED*/
-void
-dohash(Char **vv, struct command *c)
-{
-#ifdef COMMENT
-    struct stat stb;
-#endif
-    DIR    *dirp;
-    struct dirent *dp;
-    int     i = 0;
-    struct varent *v = adrof(STRpath);
-    Char  **pv;
-    int hashval;
-#ifdef WINNT_NATIVE
-    int is_windir; /* check if it is the windows directory */
-    USE(hashval);
-#endif /* WINNT_NATIVE */
-
-    USE(c);
-#ifdef FASTHASH
-    if (vv && vv[1]) {
-        uhashlength = atoi(short2str(vv[1]));
-        if (vv[2]) {
-	    uhashwidth = atoi(short2str(vv[2]));
-	    if ((uhashwidth != sizeof(unsigned char)) && 
-	        (uhashwidth != sizeof(unsigned short)) && 
-	        (uhashwidth != sizeof(unsigned long)))
-	        uhashwidth = 0;
-	    if (vv[3])
-		hashdebug = atoi(short2str(vv[3]));
-        }
-    }
-
-    if (uhashwidth)
-	hashwidth = uhashwidth;
-    else {
-	hashwidth = 0;
-	if (v == NULL)
-	    return;
-	for (pv = v->vec; pv && *pv; pv++, hashwidth++)
-	    continue;
-	if (hashwidth <= widthof(unsigned char))
-	    hashwidth = sizeof(unsigned char);
-	else if (hashwidth <= widthof(unsigned short))
-	    hashwidth = sizeof(unsigned short);
-	else if (hashwidth <= widthof(unsigned int))
-	    hashwidth = sizeof(unsigned int);
-	else
-	    hashwidth = sizeof(unsigned long);
-    }
-
-    if (uhashlength)
-	hashlength = uhashlength;
-    else
-        hashlength = hashwidth * (8*64);/* "average" files per dir in path */
-
-    xfree(xhash);
-    xhash = xcalloc(hashlength * hashwidth, 1);
-#endif /* FASTHASH */
-
-    (void) getusername(NULL);	/* flush the tilde cashe */
-    tw_cmd_free();
-    havhash = 1;
-    if (v == NULL)
-	return;
-    for (pv = v->vec; pv && *pv; pv++, i++) {
-	if (!ABSOLUTEP(pv[0]))
-	    continue;
-	dirp = opendir(short2str(*pv));
-	if (dirp == NULL)
-	    continue;
-	cleanup_push(dirp, opendir_cleanup);
-#ifdef COMMENT			/* this isn't needed.  opendir won't open
-				 * non-dirs */
-	if (fstat(dirp->dd_fd, &stb) < 0 || !S_ISDIR(stb.st_mode)) {
-	    cleanup_until(dirp);
-	    continue;
-	}
-#endif
-#ifdef WINNT_NATIVE
-	is_windir = nt_check_if_windir(short2str(*pv));
-#endif /* WINNT_NATIVE */
-	while ((dp = readdir(dirp)) != NULL) {
-	    if (dp->d_ino == 0)
-		continue;
-	    if (dp->d_name[0] == '.' &&
-		(dp->d_name[1] == '\0' ||
-		 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
-		continue;
-#ifdef WINNT_NATIVE
-	    nt_check_name_and_hash(is_windir, dp->d_name, i);
-#else /* !WINNT_NATIVE*/
-#if defined(_UWIN) || defined(__CYGWIN__)
-	    /* Turn foo.{exe,com,bat} into foo since UWIN's readdir returns
-	     * the file with the .exe, .com, .bat extension
-	     */
-	    {
-		ssize_t	ext = strlen(dp->d_name) - 4;
-		if ((ext > 0) && (strcasecmp(&dp->d_name[ext], ".exe") == 0 ||
-				  strcasecmp(&dp->d_name[ext], ".bat") == 0 ||
-				  strcasecmp(&dp->d_name[ext], ".com") == 0)) {
-#ifdef __CYGWIN__
-		    /* Also store the variation with extension. */
-		    hashval = hashname(str2short(dp->d_name));
-		    bis(hashval, i);
-#endif /* __CYGWIN__ */
-		    dp->d_name[ext] = '\0';
-		}
-	    }
-#endif /* _UWIN || __CYGWIN__ */
-# ifdef FASTHASH
-	    hashval = hashname(str2short(dp->d_name));
-	    bis(hashval, i);
-	    if (hashdebug & 1)
-	        xprintf(CGETS(13, 1, "hash=%-4d dir=%-2d prog=%s\n"),
-		        hashname(str2short(dp->d_name)), i, dp->d_name);
-# else /* OLD HASH */
-	    hashval = hash(hashname(str2short(dp->d_name)), i);
-	    bis(xhash, hashval);
-# endif /* FASTHASH */
-	    /* tw_add_comm_name (dp->d_name); */
-#endif /* WINNT_NATIVE */
-	}
-	cleanup_until(dirp);
-    }
-}
-
-/*ARGSUSED*/
-void
-dounhash(Char **v, struct command *c)
-{
-    USE(c);
-    USE(v);
-    havhash = 0;
-#ifdef FASTHASH
-    xfree(xhash);
-    xhash = NULL;
-#endif /* FASTHASH */
-}
-
-/*ARGSUSED*/
-void
-hashstat(Char **v, struct command *c)
-{
-    USE(c);
-    USE(v);
-#ifdef FASTHASH 
-   if (havhash && hashlength && hashwidth)
-      xprintf(CGETS(13, 2, "%d hash buckets of %d bits each\n"),
-	      hashlength, hashwidth*8);
-   if (hashdebug)
-      xprintf(CGETS(13, 3, "debug mask = 0x%08x\n"), hashdebug);
-#endif /* FASTHASH */
-#ifdef VFORK
-   if (hits + misses)
-      xprintf(CGETS(13, 4, "%d hits, %d misses, %d%%\n"),
-	      hits, misses, 100 * hits / (hits + misses));
-#endif
-}
-
-
-/*
- * Hash a command name.
- */
-int
-hashname(Char *cp)
-{
-    unsigned long h;
-
-    for (h = 0; *cp; cp++)
-	h = hash(h, *cp);
-    return ((int) h);
-}
-
-static int
-iscommand(Char *name)
-{
-    Char **pv;
-    Char *sav;
-    struct varent *v;
-    int slash = any(short2str(name), '/');
-    int hashval, i;
-
-    v = adrof(STRpath);
-    if (v == NULL || v->vec == NULL || v->vec[0] == NULL || slash)
-	pv = justabs;
-    else
-	pv = v->vec;
-    sav = Strspl(STRslash, name);	/* / command name for postpending */
-    hashval = havhash ? hashname(name) : 0;
-    i = 0;
-    do {
-	if (!slash && ABSOLUTEP(pv[0]) && havhash) {
-#ifdef FASTHASH
-	    if (!bit(hashval, i))
-		goto cont;
-#else /* OLDHASH */
-	    int hashval1 = hash(hashval, i);
-	    if (!bit(xhash, hashval1))
-		goto cont;
-#endif /* FASTHASH */
-	}
-	if (pv[0][0] == 0 || eq(pv[0], STRdot)) {	/* don't make ./xxx */
-	    if (executable(NULL, name, 0)) {
-		xfree(sav);
-		return i + 1;
-	    }
-	}
-	else {
-	    if (executable(*pv, sav, 0)) {
-		xfree(sav);
-		return i + 1;
-	    }
-	}
-cont:
-	pv++;
-	i++;
-    } while (*pv);
-    xfree(sav);
-    return 0;
-}
-
-/* Also by:
- *  Andreas Luik <luik@isaak.isa.de>
- *  I S A  GmbH - Informationssysteme fuer computerintegrierte Automatisierung
- *  Azenberstr. 35
- *  D-7000 Stuttgart 1
- *  West-Germany
- * is the executable() routine below and changes to iscommand().
- * Thanks again!!
- */
-
-#ifndef WINNT_NATIVE
-/*
- * executable() examines the pathname obtained by concatenating dir and name
- * (dir may be NULL), and returns 1 either if it is executable by us, or
- * if dir_ok is set and the pathname refers to a directory.
- * This is a bit kludgy, but in the name of optimization...
- */
-int
-executable(const Char *dir, const Char *name, int dir_ok)
-{
-    struct stat stbuf;
-    char   *strname;
-
-    if (dir && *dir) {
-	Char *path;
-
-	path = Strspl(dir, name);
-	strname = short2str(path);
-	xfree(path);
-    }
-    else
-	strname = short2str(name);
-
-    return (stat(strname, &stbuf) != -1 &&
-	    ((dir_ok && S_ISDIR(stbuf.st_mode)) ||
-	     (S_ISREG(stbuf.st_mode) &&
-    /* save time by not calling access() in the hopeless case */
-	      (stbuf.st_mode & (S_IXOTH | S_IXGRP | S_IXUSR)) &&
-	      access(strname, X_OK) == 0
-	)));
-}
-#endif /*!WINNT_NATIVE*/
-
-struct tellmewhat_s0_cleanup
-{
-    Char **dest, *val;
-};
-
-static void
-tellmewhat_s0_cleanup(void *xstate)
-{
-    struct tellmewhat_s0_cleanup *state;
-
-    state = xstate;
-    *state->dest = state->val;
-}
-
-int
-tellmewhat(struct wordent *lexp, Char **str)
-{
-    struct tellmewhat_s0_cleanup s0;
-    int i;
-    const struct biltins *bptr;
-    struct wordent *sp = lexp->next;
-    int    aliased = 0, found;
-    Char   *s1, *s2, *cmd;
-    Char    qc;
-
-    if (adrof1(sp->word, &aliases)) {
-	alias(lexp);
-	sp = lexp->next;
-	aliased = 1;
-    }
-
-    s0.dest = &sp->word;	/* to get the memory freeing right... */
-    s0.val = sp->word;
-    cleanup_push(&s0, tellmewhat_s0_cleanup);
-
-    /* handle quoted alias hack */
-    if ((*(sp->word) & (QUOTE | TRIM)) == QUOTE)
-	(sp->word)++;
-
-    /* do quoting, if it hasn't been done */
-    s1 = s2 = sp->word;
-    while (*s2)
-	switch (*s2) {
-	case '\'':
-	case '"':
-	    qc = *s2++;
-	    while (*s2 && *s2 != qc)
-		*s1++ = *s2++ | QUOTE;
-	    if (*s2)
-		s2++;
-	    break;
-	case '\\':
-	    if (*++s2)
-		*s1++ = *s2++ | QUOTE;
-	    break;
-	default:
-	    *s1++ = *s2++;
-	}
-    *s1 = '\0';
-
-    for (bptr = bfunc; bptr < &bfunc[nbfunc]; bptr++) {
-	if (eq(sp->word, str2short(bptr->bname))) {
-	    if (str == NULL) {
-		if (aliased)
-		    prlex(lexp);
-		xprintf(CGETS(13, 5, "%S: shell built-in command.\n"),
-			      sp->word);
-		flush();
-	    }
-	    else
-		*str = Strsave(sp->word);
-	    cleanup_until(&s0);
-	    return TRUE;
-	}
-    }
-#ifdef WINNT_NATIVE
-    for (bptr = nt_bfunc; bptr < &nt_bfunc[nt_nbfunc]; bptr++) {
-	if (eq(sp->word, str2short(bptr->bname))) {
-	    if (str == NULL) {
-		if (aliased)
-		    prlex(lexp);
-		xprintf(CGETS(13, 5, "%S: shell built-in command.\n"),
-			      sp->word);
-		flush();
-	    }
-	    else
-		*str = Strsave(sp->word);
-	    cleanup_until(&s0);
-	    return TRUE;
-	}
-    }
-#endif /* WINNT_NATIVE*/
-
-    sp->word = cmd = globone(sp->word, G_IGNORE);
-    cleanup_push(cmd, xfree);
-
-    if ((i = iscommand(sp->word)) != 0) {
-	Char **pv;
-	struct varent *v;
-	int    slash = any(short2str(sp->word), '/');
-
-	v = adrof(STRpath);
-	if (v == NULL || v->vec == NULL || v->vec[0] == NULL || slash)
-	    pv = justabs;
-	else
-	    pv = v->vec;
-
-	pv += i - 1;
-	if (pv[0][0] == 0 || eq(pv[0], STRdot)) {
-	    if (!slash) {
-		sp->word = Strspl(STRdotsl, sp->word);
-		cleanup_push(sp->word, xfree);
-		prlex(lexp);
-		cleanup_until(sp->word);
-	    }
-	    else
-		prlex(lexp);
-	}
-	else {
-	    s1 = Strspl(*pv, STRslash);
-	    sp->word = Strspl(s1, sp->word);
-	    xfree(s1);
-	    cleanup_push(sp->word, xfree);
-	    if (str == NULL)
-		prlex(lexp);
-	    else
-		*str = Strsave(sp->word);
-	    cleanup_until(sp->word);
-	}
-	found = 1;
-    }
-    else {
-	if (str == NULL) {
-	    if (aliased)
-		prlex(lexp);
-	    xprintf(CGETS(13, 6, "%S: Command not found.\n"), sp->word);
-	    flush();
-	}
-	else
-	    *str = Strsave(sp->word);
-	found = 0;
-    }
-    cleanup_until(&s0);
-    return found;
-}
-
-/*
- * Builtin to look at and list all places a command may be defined:
- * aliases, shell builtins, and the path.
- *
- * Marc Horowitz <marc@mit.edu>
- * MIT Student Information Processing Board
- */
-
-/*ARGSUSED*/
-void
-dowhere(Char **v, struct command *c)
-{
-    int found = 1;
-    USE(c);
-    for (v++; *v; v++)
-	found &= find_cmd(*v, 1);
-    /* Make status nonzero if any command is not found. */
-    if (!found)
-	setcopy(STRstatus, STR1, VAR_READWRITE);
-}
-
-int
-find_cmd(Char *cmd, int prt)
-{
-    struct varent *var;
-    const struct biltins *bptr;
-    Char **pv;
-    Char *sv;
-    int hashval, i, ex, rval = 0;
-
-    if (prt && any(short2str(cmd), '/')) {
-	xprintf(CGETS(13, 7, "where: / in command makes no sense\n"));
-	return rval;
-    }
-
-    /* first, look for an alias */
-
-    if (prt && adrof1(cmd, &aliases)) {
-	if ((var = adrof1(cmd, &aliases)) != NULL) {
-	    xprintf(CGETS(13, 8, "%S is aliased to "), cmd);
-	    if (var->vec != NULL)
-		blkpr(var->vec);
-	    xputchar('\n');
-	    rval = 1;
-	}
-    }
-
-    /* next, look for a shell builtin */
-
-    for (bptr = bfunc; bptr < &bfunc[nbfunc]; bptr++) {
-	if (eq(cmd, str2short(bptr->bname))) {
-	    rval = 1;
-	    if (prt)
-		xprintf(CGETS(13, 9, "%S is a shell built-in\n"), cmd);
-	    else
-		return rval;
-	}
-    }
-#ifdef WINNT_NATIVE
-    for (bptr = nt_bfunc; bptr < &nt_bfunc[nt_nbfunc]; bptr++) {
-	if (eq(cmd, str2short(bptr->bname))) {
-	    rval = 1;
-	    if (prt)
-		xprintf(CGETS(13, 9, "%S is a shell built-in\n"), cmd);
-	    else
-		return rval;
-	}
-    }
-#endif /* WINNT_NATIVE*/
-
-    /* last, look through the path for the command */
-
-    if ((var = adrof(STRpath)) == NULL)
-	return rval;
-
-    hashval = havhash ? hashname(cmd) : 0;
-
-    sv = Strspl(STRslash, cmd);
-    cleanup_push(sv, xfree);
-
-    for (pv = var->vec, i = 0; pv && *pv; pv++, i++) {
-	if (havhash && !eq(*pv, STRdot)) {
-#ifdef FASTHASH
-	    if (!bit(hashval, i))
-		continue;
-#else /* OLDHASH */
-	    int hashval1 = hash(hashval, i);
-	    if (!bit(xhash, hashval1))
-		continue;
-#endif /* FASTHASH */
-	}
-	ex = executable(*pv, sv, 0);
-#ifdef FASTHASH
-	if (!ex && (hashdebug & 2)) {
-	    xprintf(CGETS(13, 10, "hash miss: "));
-	    ex = 1;	/* Force printing */
-	}
-#endif /* FASTHASH */
-	if (ex) {
-	    rval = 1;
-	    if (prt) {
-		xprintf("%S/", *pv);
-		xprintf("%S\n", cmd);
-	    }
-	    else
-		return rval;
-	}
-    }
-    cleanup_until(sv);
-    return rval;
-}
-#ifdef WINNT_NATIVE
-int hashval_extern(cp)
-	Char *cp;
-{
-	return havhash?hashname(cp):0;
-}
-int bit_extern(val,i)
-	int val;
-	int i;
-{
-	return bit(val,i);
-}
-void bis_extern(val,i)
-	int val;
-	int i;
-{
-	bis(val,i);
-}
-#endif /* WINNT_NATIVE */
-