1994-05-26 06:18:55 +00:00
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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1998-05-18 06:44:24 +00:00
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#if 0
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static char sccsid[] = "@(#)cd.c 8.2 (Berkeley) 5/4/95";
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#endif
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1994-05-26 06:18:55 +00:00
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#endif /* not lint */
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2002-06-30 05:15:05 +00:00
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#include <sys/cdefs.h>
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|
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__FBSDID("$FreeBSD$");
|
1994-05-26 06:18:55 +00:00
|
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|
|
1996-09-01 10:22:36 +00:00
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|
#include <sys/types.h>
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|
|
#include <sys/stat.h>
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#include <stdlib.h>
|
1996-12-14 06:20:03 +00:00
|
|
|
#include <string.h>
|
1996-09-01 10:22:36 +00:00
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|
#include <unistd.h>
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#include <errno.h>
|
2002-07-25 09:56:08 +00:00
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#include <limits.h>
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1996-09-01 10:22:36 +00:00
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1994-05-26 06:18:55 +00:00
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/*
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* The cd and pwd commands.
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*/
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#include "shell.h"
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#include "var.h"
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#include "nodes.h" /* for jobs.h */
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#include "jobs.h"
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#include "options.h"
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#include "output.h"
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#include "memalloc.h"
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#include "error.h"
|
1996-12-14 06:20:03 +00:00
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#include "exec.h"
|
1996-09-01 10:22:36 +00:00
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#include "redir.h"
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1994-05-26 06:18:55 +00:00
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#include "mystring.h"
|
1996-09-01 10:22:36 +00:00
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#include "show.h"
|
1996-12-14 06:20:03 +00:00
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#include "cd.h"
|
1994-05-26 06:18:55 +00:00
|
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|
2010-10-13 22:18:03 +00:00
|
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static int cdlogical(char *);
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static int cdphysical(char *);
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static int docd(char *, int, int);
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static char *getcomponent(void);
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static char *findcwd(char *);
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static void updatepwd(char *);
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static char *getpwd(void);
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static char *getpwd2(void);
|
1994-05-26 06:18:55 +00:00
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|
2010-10-13 04:01:01 +00:00
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|
static char *curdir = NULL; /* current working directory */
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|
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static char *prevdir; /* previous working directory */
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|
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static char *cdcomppath;
|
1994-05-26 06:18:55 +00:00
|
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int
|
2002-05-22 05:15:53 +00:00
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|
cdcmd(int argc, char **argv)
|
1996-09-01 10:22:36 +00:00
|
|
|
{
|
2009-12-27 18:04:05 +00:00
|
|
|
const char *dest;
|
2009-12-24 18:41:14 +00:00
|
|
|
const char *path;
|
1994-05-26 06:18:55 +00:00
|
|
|
char *p;
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|
|
struct stat statb;
|
2011-05-20 22:55:18 +00:00
|
|
|
int ch, phys, print = 0, getcwderr = 0;
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|
|
int rc;
|
1994-05-26 06:18:55 +00:00
|
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|
|
2002-07-25 10:47:38 +00:00
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|
|
optreset = 1; optind = 1; opterr = 0; /* initialize getopt */
|
2002-07-25 10:57:39 +00:00
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|
|
phys = Pflag;
|
2011-05-20 22:55:18 +00:00
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|
|
while ((ch = getopt(argc, argv, "eLP")) != -1) {
|
2002-05-22 05:15:53 +00:00
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|
|
switch (ch) {
|
2011-05-20 22:55:18 +00:00
|
|
|
case 'e':
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|
getcwderr = 1;
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|
|
break;
|
2002-05-22 05:15:53 +00:00
|
|
|
case 'L':
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phys = 0;
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break;
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case 'P':
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phys = 1;
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break;
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default:
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|
|
error("unknown option: -%c", optopt);
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|
|
break;
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|
|
}
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|
}
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argc -= optind;
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|
argv += optind;
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|
|
if (argc > 1)
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|
|
error("too many arguments");
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|
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if ((dest = *argv) == NULL && (dest = bltinlookup("HOME", 1)) == NULL)
|
1994-05-26 06:18:55 +00:00
|
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|
error("HOME not set");
|
1994-12-26 13:02:05 +00:00
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|
|
if (*dest == '\0')
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dest = ".";
|
1994-05-26 06:18:55 +00:00
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|
if (dest[0] == '-' && dest[1] == '\0') {
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|
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dest = prevdir ? prevdir : curdir;
|
1995-11-14 01:04:52 +00:00
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|
if (dest)
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print = 1;
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else
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dest = ".";
|
1994-05-26 06:18:55 +00:00
|
|
|
}
|
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|
|
if (*dest == '/' || (path = bltinlookup("CDPATH", 1)) == NULL)
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|
|
path = nullstr;
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|
|
|
while ((p = padvance(&path, dest)) != NULL) {
|
1996-09-01 10:22:36 +00:00
|
|
|
if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
|
1994-05-26 06:18:55 +00:00
|
|
|
if (!print) {
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|
|
/*
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* XXX - rethink
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|
*/
|
1998-09-06 21:01:57 +00:00
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|
|
if (p[0] == '.' && p[1] == '/' && p[2] != '\0')
|
2006-06-12 21:06:00 +00:00
|
|
|
print = strcmp(p + 2, dest);
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|
else
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|
|
print = strcmp(p, dest);
|
1994-05-26 06:18:55 +00:00
|
|
|
}
|
2011-05-20 22:55:18 +00:00
|
|
|
rc = docd(p, print, phys);
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|
|
if (rc >= 0)
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|
|
return getcwderr ? rc : 0;
|
1994-05-26 06:18:55 +00:00
|
|
|
}
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|
|
}
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|
error("can't cd to %s", dest);
|
1996-09-01 10:22:36 +00:00
|
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/*NOTREACHED*/
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return 0;
|
1994-05-26 06:18:55 +00:00
|
|
|
}
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|
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|
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/*
|
2002-05-22 05:15:53 +00:00
|
|
|
* Actually change the directory. In an interactive shell, print the
|
1996-12-21 22:09:40 +00:00
|
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|
* directory name if "print" is nonzero.
|
1994-05-26 06:18:55 +00:00
|
|
|
*/
|
2010-10-13 22:18:03 +00:00
|
|
|
static int
|
2002-05-22 05:15:53 +00:00
|
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|
docd(char *dest, int print, int phys)
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|
|
{
|
2011-05-20 22:55:18 +00:00
|
|
|
int rc;
|
2002-05-22 05:15:53 +00:00
|
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|
TRACE(("docd(\"%s\", %d, %d) called\n", dest, print, phys));
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|
|
/* If logical cd fails, fall back to physical. */
|
2011-05-20 22:55:18 +00:00
|
|
|
if ((phys || (rc = cdlogical(dest)) < 0) && (rc = cdphysical(dest)) < 0)
|
2002-05-22 05:15:53 +00:00
|
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|
return (-1);
|
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|
|
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|
|
if (print && iflag && curdir)
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|
|
out1fmt("%s\n", curdir);
|
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|
|
|
2011-05-20 22:55:18 +00:00
|
|
|
return (rc);
|
2002-05-22 05:15:53 +00:00
|
|
|
}
|
|
|
|
|
2010-10-13 22:18:03 +00:00
|
|
|
static int
|
2002-05-22 05:15:53 +00:00
|
|
|
cdlogical(char *dest)
|
1996-12-14 06:20:03 +00:00
|
|
|
{
|
1998-09-06 21:01:57 +00:00
|
|
|
char *p;
|
|
|
|
char *q;
|
|
|
|
char *component;
|
|
|
|
struct stat statb;
|
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|
|
int first;
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|
|
|
int badstat;
|
1996-12-14 06:20:03 +00:00
|
|
|
|
1998-09-06 21:01:57 +00:00
|
|
|
/*
|
|
|
|
* Check each component of the path. If we find a symlink or
|
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|
|
* something we can't stat, clear curdir to force a getcwd()
|
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|
|
* next time we get the value of the current directory.
|
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|
|
*/
|
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|
|
badstat = 0;
|
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|
|
cdcomppath = stalloc(strlen(dest) + 1);
|
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|
|
scopy(dest, cdcomppath);
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|
|
STARTSTACKSTR(p);
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|
|
if (*dest == '/') {
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|
|
STPUTC('/', p);
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|
|
cdcomppath++;
|
|
|
|
}
|
|
|
|
first = 1;
|
|
|
|
while ((q = getcomponent()) != NULL) {
|
|
|
|
if (q[0] == '\0' || (q[0] == '.' && q[1] == '\0'))
|
|
|
|
continue;
|
|
|
|
if (! first)
|
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|
|
STPUTC('/', p);
|
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|
|
first = 0;
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|
|
component = q;
|
2010-11-23 22:17:39 +00:00
|
|
|
STPUTS(q, p);
|
1998-09-06 21:01:57 +00:00
|
|
|
if (equal(component, ".."))
|
|
|
|
continue;
|
|
|
|
STACKSTRNUL(p);
|
2002-05-22 05:15:53 +00:00
|
|
|
if (lstat(stackblock(), &statb) < 0) {
|
1998-09-06 21:01:57 +00:00
|
|
|
badstat = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1994-05-26 06:18:55 +00:00
|
|
|
INTOFF;
|
2008-02-24 16:50:55 +00:00
|
|
|
if ((p = findcwd(badstat ? NULL : dest)) == NULL || chdir(p) < 0) {
|
1994-05-26 06:18:55 +00:00
|
|
|
INTON;
|
2002-05-22 05:15:53 +00:00
|
|
|
return (-1);
|
1994-05-26 06:18:55 +00:00
|
|
|
}
|
2008-02-24 16:50:55 +00:00
|
|
|
updatepwd(p);
|
1994-05-26 06:18:55 +00:00
|
|
|
INTON;
|
2002-05-22 05:15:53 +00:00
|
|
|
return (0);
|
1994-05-26 06:18:55 +00:00
|
|
|
}
|
|
|
|
|
2010-10-13 22:18:03 +00:00
|
|
|
static int
|
2002-05-22 05:15:53 +00:00
|
|
|
cdphysical(char *dest)
|
|
|
|
{
|
2008-02-24 16:50:55 +00:00
|
|
|
char *p;
|
2011-05-20 22:55:18 +00:00
|
|
|
int rc = 0;
|
2002-05-22 05:15:53 +00:00
|
|
|
|
|
|
|
INTOFF;
|
2010-11-22 23:49:06 +00:00
|
|
|
if (chdir(dest) < 0) {
|
2002-05-22 05:15:53 +00:00
|
|
|
INTON;
|
|
|
|
return (-1);
|
|
|
|
}
|
2010-11-22 23:49:06 +00:00
|
|
|
p = findcwd(NULL);
|
2011-05-20 22:55:18 +00:00
|
|
|
if (p == NULL) {
|
2010-12-21 20:47:06 +00:00
|
|
|
warning("warning: failed to get name of current directory");
|
2011-05-20 22:55:18 +00:00
|
|
|
rc = 1;
|
|
|
|
}
|
2008-02-24 16:50:55 +00:00
|
|
|
updatepwd(p);
|
2002-05-22 05:15:53 +00:00
|
|
|
INTON;
|
2011-05-20 22:55:18 +00:00
|
|
|
return (rc);
|
2002-05-22 05:15:53 +00:00
|
|
|
}
|
1994-05-26 06:18:55 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Get the next component of the path name pointed to by cdcomppath.
|
|
|
|
* This routine overwrites the string pointed to by cdcomppath.
|
|
|
|
*/
|
2010-10-13 22:18:03 +00:00
|
|
|
static char *
|
2002-02-02 06:50:57 +00:00
|
|
|
getcomponent(void)
|
1996-12-21 22:09:40 +00:00
|
|
|
{
|
1997-04-28 03:06:52 +00:00
|
|
|
char *p;
|
1994-05-26 06:18:55 +00:00
|
|
|
char *start;
|
|
|
|
|
|
|
|
if ((p = cdcomppath) == NULL)
|
|
|
|
return NULL;
|
|
|
|
start = cdcomppath;
|
|
|
|
while (*p != '/' && *p != '\0')
|
|
|
|
p++;
|
|
|
|
if (*p == '\0') {
|
|
|
|
cdcomppath = NULL;
|
|
|
|
} else {
|
|
|
|
*p++ = '\0';
|
|
|
|
cdcomppath = p;
|
|
|
|
}
|
|
|
|
return start;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2010-10-13 22:18:03 +00:00
|
|
|
static char *
|
2008-02-24 16:50:55 +00:00
|
|
|
findcwd(char *dir)
|
1996-12-21 22:09:40 +00:00
|
|
|
{
|
1994-05-26 06:18:55 +00:00
|
|
|
char *new;
|
|
|
|
char *p;
|
|
|
|
|
1998-09-06 21:01:57 +00:00
|
|
|
/*
|
|
|
|
* If our argument is NULL, we don't know the current directory
|
|
|
|
* any more because we traversed a symbolic link or something
|
|
|
|
* we couldn't stat().
|
|
|
|
*/
|
2009-11-21 14:53:22 +00:00
|
|
|
if (dir == NULL || curdir == NULL)
|
|
|
|
return getpwd2();
|
1994-05-26 06:18:55 +00:00
|
|
|
cdcomppath = stalloc(strlen(dir) + 1);
|
|
|
|
scopy(dir, cdcomppath);
|
|
|
|
STARTSTACKSTR(new);
|
|
|
|
if (*dir != '/') {
|
2010-11-23 22:17:39 +00:00
|
|
|
STPUTS(curdir, new);
|
|
|
|
if (STTOPC(new) == '/')
|
1994-05-26 06:18:55 +00:00
|
|
|
STUNPUTC(new);
|
|
|
|
}
|
|
|
|
while ((p = getcomponent()) != NULL) {
|
|
|
|
if (equal(p, "..")) {
|
|
|
|
while (new > stackblock() && (STUNPUTC(new), *new) != '/');
|
|
|
|
} else if (*p != '\0' && ! equal(p, ".")) {
|
|
|
|
STPUTC('/', new);
|
2010-11-23 22:17:39 +00:00
|
|
|
STPUTS(p, new);
|
1994-05-26 06:18:55 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
if (new == stackblock())
|
|
|
|
STPUTC('/', new);
|
|
|
|
STACKSTRNUL(new);
|
2008-02-24 16:50:55 +00:00
|
|
|
return stackblock();
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Update curdir (the name of the current directory) in response to a
|
|
|
|
* cd command. We also call hashcd to let the routines in exec.c know
|
|
|
|
* that the current directory has changed.
|
|
|
|
*/
|
2010-10-13 22:18:03 +00:00
|
|
|
static void
|
2008-02-24 16:50:55 +00:00
|
|
|
updatepwd(char *dir)
|
|
|
|
{
|
|
|
|
hashcd(); /* update command hash table */
|
|
|
|
|
1998-09-06 21:01:57 +00:00
|
|
|
if (prevdir)
|
|
|
|
ckfree(prevdir);
|
|
|
|
prevdir = curdir;
|
2010-11-22 23:49:06 +00:00
|
|
|
curdir = dir ? savestr(dir) : NULL;
|
2001-11-07 23:00:05 +00:00
|
|
|
setvar("PWD", curdir, VEXPORT);
|
|
|
|
setvar("OLDPWD", prevdir, VEXPORT);
|
1994-05-26 06:18:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
2002-07-25 09:46:31 +00:00
|
|
|
pwdcmd(int argc, char **argv)
|
1996-09-01 10:22:36 +00:00
|
|
|
{
|
2009-11-21 14:53:22 +00:00
|
|
|
char *p;
|
2002-05-22 05:15:53 +00:00
|
|
|
int ch, phys;
|
1994-05-26 06:18:55 +00:00
|
|
|
|
2002-07-25 10:47:38 +00:00
|
|
|
optreset = 1; optind = 1; opterr = 0; /* initialize getopt */
|
2002-07-25 10:57:39 +00:00
|
|
|
phys = Pflag;
|
2002-05-22 05:15:53 +00:00
|
|
|
while ((ch = getopt(argc, argv, "LP")) != -1) {
|
|
|
|
switch (ch) {
|
|
|
|
case 'L':
|
|
|
|
phys = 0;
|
|
|
|
break;
|
|
|
|
case 'P':
|
|
|
|
phys = 1;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
error("unknown option: -%c", optopt);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
argc -= optind;
|
|
|
|
argv += optind;
|
1994-05-26 06:18:55 +00:00
|
|
|
|
2002-05-22 05:15:53 +00:00
|
|
|
if (argc != 0)
|
|
|
|
error("too many arguments");
|
1998-09-06 21:01:57 +00:00
|
|
|
|
2002-05-22 05:15:53 +00:00
|
|
|
if (!phys && getpwd()) {
|
|
|
|
out1str(curdir);
|
|
|
|
out1c('\n');
|
|
|
|
} else {
|
2009-11-21 14:53:22 +00:00
|
|
|
if ((p = getpwd2()) == NULL)
|
2002-05-22 05:15:53 +00:00
|
|
|
error(".: %s", strerror(errno));
|
2009-11-21 14:53:22 +00:00
|
|
|
out1str(p);
|
2002-05-22 05:15:53 +00:00
|
|
|
out1c('\n');
|
|
|
|
}
|
1998-09-06 21:01:57 +00:00
|
|
|
|
2002-05-22 05:15:53 +00:00
|
|
|
return 0;
|
|
|
|
}
|
1998-09-06 21:01:57 +00:00
|
|
|
|
1994-05-26 06:18:55 +00:00
|
|
|
/*
|
2008-02-24 16:50:55 +00:00
|
|
|
* Get the current directory and cache the result in curdir.
|
1994-05-26 06:18:55 +00:00
|
|
|
*/
|
2010-10-13 22:18:03 +00:00
|
|
|
static char *
|
2002-02-02 06:50:57 +00:00
|
|
|
getpwd(void)
|
1996-12-14 06:20:03 +00:00
|
|
|
{
|
2008-02-24 16:50:55 +00:00
|
|
|
char *p;
|
1998-09-06 21:01:57 +00:00
|
|
|
|
1994-05-26 06:18:55 +00:00
|
|
|
if (curdir)
|
1998-09-06 21:01:57 +00:00
|
|
|
return curdir;
|
2008-02-24 16:50:55 +00:00
|
|
|
|
2009-11-21 14:53:22 +00:00
|
|
|
p = getpwd2();
|
2008-02-24 16:50:55 +00:00
|
|
|
if (p != NULL)
|
|
|
|
curdir = savestr(p);
|
|
|
|
|
|
|
|
return curdir;
|
|
|
|
}
|
|
|
|
|
2009-11-21 14:53:22 +00:00
|
|
|
#define MAXPWD 256
|
|
|
|
|
2008-02-24 16:50:55 +00:00
|
|
|
/*
|
|
|
|
* Return the current directory.
|
|
|
|
*/
|
2010-10-13 22:18:03 +00:00
|
|
|
static char *
|
2009-11-21 14:53:22 +00:00
|
|
|
getpwd2(void)
|
2008-02-24 16:50:55 +00:00
|
|
|
{
|
2009-11-21 14:53:22 +00:00
|
|
|
char *pwd;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = MAXPWD;; i *= 2) {
|
|
|
|
pwd = stalloc(i);
|
|
|
|
if (getcwd(pwd, i) != NULL)
|
2008-02-24 16:50:55 +00:00
|
|
|
return pwd;
|
2009-11-21 14:53:22 +00:00
|
|
|
stunalloc(pwd);
|
|
|
|
if (errno != ERANGE)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2010-04-17 14:35:46 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize PWD in a new shell.
|
|
|
|
* If the shell is interactive, we need to warn if this fails.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
pwd_init(int warn)
|
|
|
|
{
|
|
|
|
char *pwd;
|
|
|
|
struct stat stdot, stpwd;
|
|
|
|
|
|
|
|
pwd = lookupvar("PWD");
|
2009-11-21 14:53:22 +00:00
|
|
|
if (pwd && *pwd == '/' && stat(".", &stdot) != -1 &&
|
|
|
|
stat(pwd, &stpwd) != -1 &&
|
|
|
|
stdot.st_dev == stpwd.st_dev &&
|
|
|
|
stdot.st_ino == stpwd.st_ino) {
|
2010-04-17 14:35:46 +00:00
|
|
|
if (curdir)
|
|
|
|
ckfree(curdir);
|
|
|
|
curdir = savestr(pwd);
|
1998-09-06 21:01:57 +00:00
|
|
|
}
|
2010-04-17 14:35:46 +00:00
|
|
|
if (getpwd() == NULL && warn)
|
|
|
|
out2fmt_flush("sh: cannot determine working directory\n");
|
|
|
|
setvar("PWD", curdir, VEXPORT);
|
1994-05-26 06:18:55 +00:00
|
|
|
}
|