1 /* $NetBSD: pwd.c,v 1.20 2008/05/26 14:21:08 christos Exp $ */
4 * Copyright (c) 1991, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
34 __COPYRIGHT("@(#) Copyright (c) 1991, 1993, 1994\
35 The Regents of the University of California. All rights reserved.");
40 static char sccsid
[] = "@(#)pwd.c 8.3 (Berkeley) 4/1/94";
42 __RCSID("$NetBSD: pwd.c,v 1.20 2008/05/26 14:21:08 christos Exp $");
46 #include <sys/param.h>
48 #include <sys/types.h>
58 static char *getcwd_logical(void);
59 static void usage(void);
62 * Note that EEE Std 1003.1, 2003 requires that the default be -L.
63 * This is inconsistent with the historic behaviour of everything
64 * except the ksh builtin.
65 * To avoid breaking scripts the default has been kept as -P.
66 * (Some scripts run /bin/pwd in order to get 'pwd -P'.)
70 main(int argc
, char *argv
[])
76 (void)setlocale(LC_ALL
, "");
79 while ((ch
= getopt(argc
, argv
, "LP")) != -1) {
106 err(EXIT_FAILURE
, NULL
);
108 (void)printf("%s\n", p
);
118 struct stat s_pwd
, s_dot
;
120 /* Check $PWD -- if it's right, it's fast. */
126 if (strstr(pwd
, "/./") != NULL
)
128 if (strstr(pwd
, "/../") != NULL
)
130 if (stat(pwd
, &s_pwd
) == -1 || stat(".", &s_dot
) == -1)
132 if (s_pwd
.st_dev
!= s_dot
.st_dev
|| s_pwd
.st_ino
!= s_dot
.st_ino
)
140 (void)fprintf(stderr
, "usage: %s [-LP]\n", getprogname());