xref: /freebsd/bin/sh/cd.c (revision 4b88c807ea9c629dc5691abc7e3cac9ea0d776dd)
14b88c807SRodney W. Grimes /*-
24b88c807SRodney W. Grimes  * Copyright (c) 1991, 1993
34b88c807SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
44b88c807SRodney W. Grimes  *
54b88c807SRodney W. Grimes  * This code is derived from software contributed to Berkeley by
64b88c807SRodney W. Grimes  * Kenneth Almquist.
74b88c807SRodney W. Grimes  *
84b88c807SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
94b88c807SRodney W. Grimes  * modification, are permitted provided that the following conditions
104b88c807SRodney W. Grimes  * are met:
114b88c807SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
124b88c807SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
134b88c807SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
144b88c807SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
154b88c807SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
164b88c807SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
174b88c807SRodney W. Grimes  *    must display the following acknowledgement:
184b88c807SRodney W. Grimes  *	This product includes software developed by the University of
194b88c807SRodney W. Grimes  *	California, Berkeley and its contributors.
204b88c807SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
214b88c807SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
224b88c807SRodney W. Grimes  *    without specific prior written permission.
234b88c807SRodney W. Grimes  *
244b88c807SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
254b88c807SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
264b88c807SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
274b88c807SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
284b88c807SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
294b88c807SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
304b88c807SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
314b88c807SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
324b88c807SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
334b88c807SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
344b88c807SRodney W. Grimes  * SUCH DAMAGE.
354b88c807SRodney W. Grimes  */
364b88c807SRodney W. Grimes 
374b88c807SRodney W. Grimes #ifndef lint
384b88c807SRodney W. Grimes static char sccsid[] = "@(#)cd.c	8.1 (Berkeley) 5/31/93";
394b88c807SRodney W. Grimes #endif /* not lint */
404b88c807SRodney W. Grimes 
414b88c807SRodney W. Grimes /*
424b88c807SRodney W. Grimes  * The cd and pwd commands.
434b88c807SRodney W. Grimes  */
444b88c807SRodney W. Grimes 
454b88c807SRodney W. Grimes #include "shell.h"
464b88c807SRodney W. Grimes #include "var.h"
474b88c807SRodney W. Grimes #include "nodes.h"	/* for jobs.h */
484b88c807SRodney W. Grimes #include "jobs.h"
494b88c807SRodney W. Grimes #include "options.h"
504b88c807SRodney W. Grimes #include "output.h"
514b88c807SRodney W. Grimes #include "memalloc.h"
524b88c807SRodney W. Grimes #include "error.h"
534b88c807SRodney W. Grimes #include "mystring.h"
544b88c807SRodney W. Grimes #include <sys/types.h>
554b88c807SRodney W. Grimes #include <sys/stat.h>
564b88c807SRodney W. Grimes #include <errno.h>
574b88c807SRodney W. Grimes 
584b88c807SRodney W. Grimes 
594b88c807SRodney W. Grimes #ifdef __STDC__
604b88c807SRodney W. Grimes STATIC int docd(char *, int);
614b88c807SRodney W. Grimes STATIC void updatepwd(char *);
624b88c807SRodney W. Grimes STATIC void getpwd(void);
634b88c807SRodney W. Grimes STATIC char *getcomponent(void);
644b88c807SRodney W. Grimes #else
654b88c807SRodney W. Grimes STATIC int docd();
664b88c807SRodney W. Grimes STATIC void updatepwd();
674b88c807SRodney W. Grimes STATIC void getpwd();
684b88c807SRodney W. Grimes STATIC char *getcomponent();
694b88c807SRodney W. Grimes #endif
704b88c807SRodney W. Grimes 
714b88c807SRodney W. Grimes 
724b88c807SRodney W. Grimes char *curdir;			/* current working directory */
734b88c807SRodney W. Grimes char *prevdir;			/* previous working directory */
744b88c807SRodney W. Grimes STATIC char *cdcomppath;
754b88c807SRodney W. Grimes 
764b88c807SRodney W. Grimes int
774b88c807SRodney W. Grimes cdcmd(argc, argv)  char **argv; {
784b88c807SRodney W. Grimes 	char *dest;
794b88c807SRodney W. Grimes 	char *path;
804b88c807SRodney W. Grimes 	char *p;
814b88c807SRodney W. Grimes 	struct stat statb;
824b88c807SRodney W. Grimes 	char *padvance();
834b88c807SRodney W. Grimes 	int print = 0;
844b88c807SRodney W. Grimes 
854b88c807SRodney W. Grimes 	nextopt(nullstr);
864b88c807SRodney W. Grimes 	if ((dest = *argptr) == NULL && (dest = bltinlookup("HOME", 1)) == NULL)
874b88c807SRodney W. Grimes 		error("HOME not set");
884b88c807SRodney W. Grimes 	if (dest[0] == '-' && dest[1] == '\0') {
894b88c807SRodney W. Grimes 		dest = prevdir ? prevdir : curdir;
904b88c807SRodney W. Grimes 		print = 1;
914b88c807SRodney W. Grimes 	}
924b88c807SRodney W. Grimes 	if (*dest == '/' || (path = bltinlookup("CDPATH", 1)) == NULL)
934b88c807SRodney W. Grimes 		path = nullstr;
944b88c807SRodney W. Grimes 	while ((p = padvance(&path, dest)) != NULL) {
954b88c807SRodney W. Grimes 		if (stat(p, &statb) >= 0
964b88c807SRodney W. Grimes 		 && (statb.st_mode & S_IFMT) == S_IFDIR) {
974b88c807SRodney W. Grimes 			if (!print) {
984b88c807SRodney W. Grimes 				/*
994b88c807SRodney W. Grimes 				 * XXX - rethink
1004b88c807SRodney W. Grimes 				 */
1014b88c807SRodney W. Grimes 				if (p[0] == '.' && p[1] == '/')
1024b88c807SRodney W. Grimes 					p += 2;
1034b88c807SRodney W. Grimes 				print = strcmp(p, dest);
1044b88c807SRodney W. Grimes 			}
1054b88c807SRodney W. Grimes 			if (docd(p, print) >= 0)
1064b88c807SRodney W. Grimes 				return 0;
1074b88c807SRodney W. Grimes 
1084b88c807SRodney W. Grimes 		}
1094b88c807SRodney W. Grimes 	}
1104b88c807SRodney W. Grimes 	error("can't cd to %s", dest);
1114b88c807SRodney W. Grimes }
1124b88c807SRodney W. Grimes 
1134b88c807SRodney W. Grimes 
1144b88c807SRodney W. Grimes /*
1154b88c807SRodney W. Grimes  * Actually do the chdir.  If the name refers to symbolic links, we
1164b88c807SRodney W. Grimes  * compute the actual directory name before doing the cd.  In an
1174b88c807SRodney W. Grimes  * interactive shell, print the directory name if "print" is nonzero
1184b88c807SRodney W. Grimes  * or if the name refers to a symbolic link.  We also print the name
1194b88c807SRodney W. Grimes  * if "/u/logname" was expanded in it, since this is similar to a
1204b88c807SRodney W. Grimes  * symbolic link.  (The check for this breaks if the user gives the
1214b88c807SRodney W. Grimes  * cd command some additional, unused arguments.)
1224b88c807SRodney W. Grimes  */
1234b88c807SRodney W. Grimes 
1244b88c807SRodney W. Grimes #if SYMLINKS == 0
1254b88c807SRodney W. Grimes STATIC int
1264b88c807SRodney W. Grimes docd(dest, print)
1274b88c807SRodney W. Grimes 	char *dest;
1284b88c807SRodney W. Grimes 	{
1294b88c807SRodney W. Grimes 	INTOFF;
1304b88c807SRodney W. Grimes 	if (chdir(dest) < 0) {
1314b88c807SRodney W. Grimes 		INTON;
1324b88c807SRodney W. Grimes 		return -1;
1334b88c807SRodney W. Grimes 	}
1344b88c807SRodney W. Grimes 	updatepwd(dest);
1354b88c807SRodney W. Grimes 	INTON;
1364b88c807SRodney W. Grimes 	if (print && iflag)
1374b88c807SRodney W. Grimes 		out1fmt("%s\n", stackblock());
1384b88c807SRodney W. Grimes 	return 0;
1394b88c807SRodney W. Grimes }
1404b88c807SRodney W. Grimes 
1414b88c807SRodney W. Grimes #else
1424b88c807SRodney W. Grimes 
1434b88c807SRodney W. Grimes 
1444b88c807SRodney W. Grimes 
1454b88c807SRodney W. Grimes STATIC int
1464b88c807SRodney W. Grimes docd(dest, print)
1474b88c807SRodney W. Grimes 	char *dest;
1484b88c807SRodney W. Grimes 	{
1494b88c807SRodney W. Grimes 	register char *p;
1504b88c807SRodney W. Grimes 	register char *q;
1514b88c807SRodney W. Grimes 	char *symlink;
1524b88c807SRodney W. Grimes 	char *component;
1534b88c807SRodney W. Grimes 	struct stat statb;
1544b88c807SRodney W. Grimes 	int first;
1554b88c807SRodney W. Grimes 	int i;
1564b88c807SRodney W. Grimes 
1574b88c807SRodney W. Grimes 	TRACE(("docd(\"%s\", %d) called\n", dest, print));
1584b88c807SRodney W. Grimes 
1594b88c807SRodney W. Grimes top:
1604b88c807SRodney W. Grimes 	cdcomppath = dest;
1614b88c807SRodney W. Grimes 	STARTSTACKSTR(p);
1624b88c807SRodney W. Grimes 	if (*dest == '/') {
1634b88c807SRodney W. Grimes 		STPUTC('/', p);
1644b88c807SRodney W. Grimes 		cdcomppath++;
1654b88c807SRodney W. Grimes 	}
1664b88c807SRodney W. Grimes 	first = 1;
1674b88c807SRodney W. Grimes 	while ((q = getcomponent()) != NULL) {
1684b88c807SRodney W. Grimes 		if (q[0] == '\0' || q[0] == '.' && q[1] == '\0')
1694b88c807SRodney W. Grimes 			continue;
1704b88c807SRodney W. Grimes 		if (! first)
1714b88c807SRodney W. Grimes 			STPUTC('/', p);
1724b88c807SRodney W. Grimes 		first = 0;
1734b88c807SRodney W. Grimes 		component = q;
1744b88c807SRodney W. Grimes 		while (*q)
1754b88c807SRodney W. Grimes 			STPUTC(*q++, p);
1764b88c807SRodney W. Grimes 		if (equal(component, ".."))
1774b88c807SRodney W. Grimes 			continue;
1784b88c807SRodney W. Grimes 		STACKSTRNUL(p);
1794b88c807SRodney W. Grimes 		if (lstat(stackblock(), &statb) < 0)
1804b88c807SRodney W. Grimes 			error("lstat %s failed", stackblock());
1814b88c807SRodney W. Grimes 		if ((statb.st_mode & S_IFMT) != S_IFLNK)
1824b88c807SRodney W. Grimes 			continue;
1834b88c807SRodney W. Grimes 
1844b88c807SRodney W. Grimes 		/* Hit a symbolic link.  We have to start all over again. */
1854b88c807SRodney W. Grimes 		print = 1;
1864b88c807SRodney W. Grimes 		STPUTC('\0', p);
1874b88c807SRodney W. Grimes 		symlink = grabstackstr(p);
1884b88c807SRodney W. Grimes 		i = (int)statb.st_size + 2;		/* 2 for '/' and '\0' */
1894b88c807SRodney W. Grimes 		if (cdcomppath != NULL)
1904b88c807SRodney W. Grimes 			i += strlen(cdcomppath);
1914b88c807SRodney W. Grimes 		p = stalloc(i);
1924b88c807SRodney W. Grimes 		if (readlink(symlink, p, (int)statb.st_size) < 0) {
1934b88c807SRodney W. Grimes 			error("readlink %s failed", stackblock());
1944b88c807SRodney W. Grimes 		}
1954b88c807SRodney W. Grimes 		if (cdcomppath != NULL) {
1964b88c807SRodney W. Grimes 			p[(int)statb.st_size] = '/';
1974b88c807SRodney W. Grimes 			scopy(cdcomppath, p + (int)statb.st_size + 1);
1984b88c807SRodney W. Grimes 		} else {
1994b88c807SRodney W. Grimes 			p[(int)statb.st_size] = '\0';
2004b88c807SRodney W. Grimes 		}
2014b88c807SRodney W. Grimes 		if (p[0] != '/') {	/* relative path name */
2024b88c807SRodney W. Grimes 			char *r;
2034b88c807SRodney W. Grimes 			q = r = symlink;
2044b88c807SRodney W. Grimes 			while (*q) {
2054b88c807SRodney W. Grimes 				if (*q++ == '/')
2064b88c807SRodney W. Grimes 					r = q;
2074b88c807SRodney W. Grimes 			}
2084b88c807SRodney W. Grimes 			*r = '\0';
2094b88c807SRodney W. Grimes 			dest = stalloc(strlen(symlink) + strlen(p) + 1);
2104b88c807SRodney W. Grimes 			scopy(symlink, dest);
2114b88c807SRodney W. Grimes 			strcat(dest, p);
2124b88c807SRodney W. Grimes 		} else {
2134b88c807SRodney W. Grimes 			dest = p;
2144b88c807SRodney W. Grimes 		}
2154b88c807SRodney W. Grimes 		goto top;
2164b88c807SRodney W. Grimes 	}
2174b88c807SRodney W. Grimes 	STPUTC('\0', p);
2184b88c807SRodney W. Grimes 	p = grabstackstr(p);
2194b88c807SRodney W. Grimes 	INTOFF;
2204b88c807SRodney W. Grimes 	if (chdir(p) < 0) {
2214b88c807SRodney W. Grimes 		INTON;
2224b88c807SRodney W. Grimes 		return -1;
2234b88c807SRodney W. Grimes 	}
2244b88c807SRodney W. Grimes 	updatepwd(p);
2254b88c807SRodney W. Grimes 	INTON;
2264b88c807SRodney W. Grimes 	if (print && iflag)
2274b88c807SRodney W. Grimes 		out1fmt("%s\n", p);
2284b88c807SRodney W. Grimes 	return 0;
2294b88c807SRodney W. Grimes }
2304b88c807SRodney W. Grimes #endif /* SYMLINKS */
2314b88c807SRodney W. Grimes 
2324b88c807SRodney W. Grimes 
2334b88c807SRodney W. Grimes 
2344b88c807SRodney W. Grimes /*
2354b88c807SRodney W. Grimes  * Get the next component of the path name pointed to by cdcomppath.
2364b88c807SRodney W. Grimes  * This routine overwrites the string pointed to by cdcomppath.
2374b88c807SRodney W. Grimes  */
2384b88c807SRodney W. Grimes 
2394b88c807SRodney W. Grimes STATIC char *
2404b88c807SRodney W. Grimes getcomponent() {
2414b88c807SRodney W. Grimes 	register char *p;
2424b88c807SRodney W. Grimes 	char *start;
2434b88c807SRodney W. Grimes 
2444b88c807SRodney W. Grimes 	if ((p = cdcomppath) == NULL)
2454b88c807SRodney W. Grimes 		return NULL;
2464b88c807SRodney W. Grimes 	start = cdcomppath;
2474b88c807SRodney W. Grimes 	while (*p != '/' && *p != '\0')
2484b88c807SRodney W. Grimes 		p++;
2494b88c807SRodney W. Grimes 	if (*p == '\0') {
2504b88c807SRodney W. Grimes 		cdcomppath = NULL;
2514b88c807SRodney W. Grimes 	} else {
2524b88c807SRodney W. Grimes 		*p++ = '\0';
2534b88c807SRodney W. Grimes 		cdcomppath = p;
2544b88c807SRodney W. Grimes 	}
2554b88c807SRodney W. Grimes 	return start;
2564b88c807SRodney W. Grimes }
2574b88c807SRodney W. Grimes 
2584b88c807SRodney W. Grimes 
2594b88c807SRodney W. Grimes 
2604b88c807SRodney W. Grimes /*
2614b88c807SRodney W. Grimes  * Update curdir (the name of the current directory) in response to a
2624b88c807SRodney W. Grimes  * cd command.  We also call hashcd to let the routines in exec.c know
2634b88c807SRodney W. Grimes  * that the current directory has changed.
2644b88c807SRodney W. Grimes  */
2654b88c807SRodney W. Grimes 
2664b88c807SRodney W. Grimes void hashcd();
2674b88c807SRodney W. Grimes 
2684b88c807SRodney W. Grimes STATIC void
2694b88c807SRodney W. Grimes updatepwd(dir)
2704b88c807SRodney W. Grimes 	char *dir;
2714b88c807SRodney W. Grimes 	{
2724b88c807SRodney W. Grimes 	char *new;
2734b88c807SRodney W. Grimes 	char *p;
2744b88c807SRodney W. Grimes 
2754b88c807SRodney W. Grimes 	hashcd();				/* update command hash table */
2764b88c807SRodney W. Grimes 	cdcomppath = stalloc(strlen(dir) + 1);
2774b88c807SRodney W. Grimes 	scopy(dir, cdcomppath);
2784b88c807SRodney W. Grimes 	STARTSTACKSTR(new);
2794b88c807SRodney W. Grimes 	if (*dir != '/') {
2804b88c807SRodney W. Grimes 		if (curdir == NULL)
2814b88c807SRodney W. Grimes 			return;
2824b88c807SRodney W. Grimes 		p = curdir;
2834b88c807SRodney W. Grimes 		while (*p)
2844b88c807SRodney W. Grimes 			STPUTC(*p++, new);
2854b88c807SRodney W. Grimes 		if (p[-1] == '/')
2864b88c807SRodney W. Grimes 			STUNPUTC(new);
2874b88c807SRodney W. Grimes 	}
2884b88c807SRodney W. Grimes 	while ((p = getcomponent()) != NULL) {
2894b88c807SRodney W. Grimes 		if (equal(p, "..")) {
2904b88c807SRodney W. Grimes 			while (new > stackblock() && (STUNPUTC(new), *new) != '/');
2914b88c807SRodney W. Grimes 		} else if (*p != '\0' && ! equal(p, ".")) {
2924b88c807SRodney W. Grimes 			STPUTC('/', new);
2934b88c807SRodney W. Grimes 			while (*p)
2944b88c807SRodney W. Grimes 				STPUTC(*p++, new);
2954b88c807SRodney W. Grimes 		}
2964b88c807SRodney W. Grimes 	}
2974b88c807SRodney W. Grimes 	if (new == stackblock())
2984b88c807SRodney W. Grimes 		STPUTC('/', new);
2994b88c807SRodney W. Grimes 	STACKSTRNUL(new);
3004b88c807SRodney W. Grimes 	INTOFF;
3014b88c807SRodney W. Grimes 	if (prevdir)
3024b88c807SRodney W. Grimes 		ckfree(prevdir);
3034b88c807SRodney W. Grimes 	prevdir = curdir;
3044b88c807SRodney W. Grimes 	curdir = savestr(stackblock());
3054b88c807SRodney W. Grimes 	INTON;
3064b88c807SRodney W. Grimes }
3074b88c807SRodney W. Grimes 
3084b88c807SRodney W. Grimes 
3094b88c807SRodney W. Grimes 
3104b88c807SRodney W. Grimes int
3114b88c807SRodney W. Grimes pwdcmd(argc, argv)  char **argv; {
3124b88c807SRodney W. Grimes 	getpwd();
3134b88c807SRodney W. Grimes 	out1str(curdir);
3144b88c807SRodney W. Grimes 	out1c('\n');
3154b88c807SRodney W. Grimes 	return 0;
3164b88c807SRodney W. Grimes }
3174b88c807SRodney W. Grimes 
3184b88c807SRodney W. Grimes 
3194b88c807SRodney W. Grimes 
3204b88c807SRodney W. Grimes /*
3214b88c807SRodney W. Grimes  * Run /bin/pwd to find out what the current directory is.  We suppress
3224b88c807SRodney W. Grimes  * interrupts throughout most of this, but the user can still break out
3234b88c807SRodney W. Grimes  * of it by killing the pwd program.  If we already know the current
3244b88c807SRodney W. Grimes  * directory, this routine returns immediately.
3254b88c807SRodney W. Grimes  */
3264b88c807SRodney W. Grimes 
3274b88c807SRodney W. Grimes #define MAXPWD 256
3284b88c807SRodney W. Grimes 
3294b88c807SRodney W. Grimes STATIC void
3304b88c807SRodney W. Grimes getpwd() {
3314b88c807SRodney W. Grimes 	char buf[MAXPWD];
3324b88c807SRodney W. Grimes 	char *p;
3334b88c807SRodney W. Grimes 	int i;
3344b88c807SRodney W. Grimes 	int status;
3354b88c807SRodney W. Grimes 	struct job *jp;
3364b88c807SRodney W. Grimes 	int pip[2];
3374b88c807SRodney W. Grimes 
3384b88c807SRodney W. Grimes 	if (curdir)
3394b88c807SRodney W. Grimes 		return;
3404b88c807SRodney W. Grimes 	INTOFF;
3414b88c807SRodney W. Grimes 	if (pipe(pip) < 0)
3424b88c807SRodney W. Grimes 		error("Pipe call failed");
3434b88c807SRodney W. Grimes 	jp = makejob((union node *)NULL, 1);
3444b88c807SRodney W. Grimes 	if (forkshell(jp, (union node *)NULL, FORK_NOJOB) == 0) {
3454b88c807SRodney W. Grimes 		close(pip[0]);
3464b88c807SRodney W. Grimes 		if (pip[1] != 1) {
3474b88c807SRodney W. Grimes 			close(1);
3484b88c807SRodney W. Grimes 			copyfd(pip[1], 1);
3494b88c807SRodney W. Grimes 			close(pip[1]);
3504b88c807SRodney W. Grimes 		}
3514b88c807SRodney W. Grimes 		execl("/bin/pwd", "pwd", (char *)0);
3524b88c807SRodney W. Grimes 		error("Cannot exec /bin/pwd");
3534b88c807SRodney W. Grimes 	}
3544b88c807SRodney W. Grimes 	close(pip[1]);
3554b88c807SRodney W. Grimes 	pip[1] = -1;
3564b88c807SRodney W. Grimes 	p = buf;
3574b88c807SRodney W. Grimes 	while ((i = read(pip[0], p, buf + MAXPWD - p)) > 0
3584b88c807SRodney W. Grimes 	     || i == -1 && errno == EINTR) {
3594b88c807SRodney W. Grimes 		if (i > 0)
3604b88c807SRodney W. Grimes 			p += i;
3614b88c807SRodney W. Grimes 	}
3624b88c807SRodney W. Grimes 	close(pip[0]);
3634b88c807SRodney W. Grimes 	pip[0] = -1;
3644b88c807SRodney W. Grimes 	status = waitforjob(jp);
3654b88c807SRodney W. Grimes 	if (status != 0)
3664b88c807SRodney W. Grimes 		error((char *)0);
3674b88c807SRodney W. Grimes 	if (i < 0 || p == buf || p[-1] != '\n')
3684b88c807SRodney W. Grimes 		error("pwd command failed");
3694b88c807SRodney W. Grimes 	p[-1] = '\0';
3704b88c807SRodney W. Grimes 	curdir = savestr(buf);
3714b88c807SRodney W. Grimes 	INTON;
3724b88c807SRodney W. Grimes }
373