NetBSD/bin/pwd/pwd.c

102 lines
3.1 KiB
C
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/* $NetBSD: pwd.c,v 1.10 1998/07/28 05:31:26 mycroft Exp $ */
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/*
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* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
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*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1991, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
#ifndef lint
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#if 0
static char sccsid[] = "@(#)pwd.c 8.3 (Berkeley) 4/1/94";
#else
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__RCSID("$NetBSD: pwd.c,v 1.10 1998/07/28 05:31:26 mycroft Exp $");
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#endif
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#endif /* not lint */
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#include <err.h>
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
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void usage __P((void));
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int main __P((int, char *[]));
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int
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main(argc, argv)
int argc;
char *argv[];
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{
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int ch;
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char *p;
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/*
* Flags for pwd are a bit strange. The POSIX 1003.2B/D9 document
* has an optional -P flag for physical, which is what this program
* will produce by default. The logical flag, -L, should fail, as
* there's no way to display a logical path after forking. We don't
* document either flag, only adding -P for future portability.
*/
while ((ch = getopt(argc, argv, "P")) != -1)
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switch (ch) {
case 'P':
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
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if ((p = getcwd(NULL, 0)) == NULL)
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err(1, "%s", "");
(void)printf("%s\n", p);
exit(0);
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/* NOTREACHED */
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}
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void
usage()
{
(void)fprintf(stderr, "usage: pwd\n");
exit(1);
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/* NOTREACHED */
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}