gno/bin/pwd/pwd.c

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1997-10-03 04:05:02 +00:00
/*
* Copyright (c) 1991, 1993, 1994
* 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. 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.
*
* $Id: pwd.c,v 1.1 1997/10/03 04:02:33 gdr Exp $
*/
/*
* Modified for GNO (Apple IIGS) by Dave Tribby, September 1997
*
* Constructs unacceptable to compiler are replaced using #ifndef __ORCAC__
*
* Changes not related to compiler are replaced using #ifndef __GNO__
*
* Added prototyped headers, surrounded by #ifndef __STDC__
*/
#ifndef __GNO__
#ifndef lint
static char const copyright[] =
"@(#) Copyright (c) 1991, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char const sccsid[] = "@(#)pwd.c 8.3 (Berkeley) 4/1/94";
#endif /* not lint */
#endif
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
void usage __P((void));
/* Interface to check on how much stack space a C program uses. */
#if defined(__GNO__) && defined(__STACK_CHECK__)
#ifndef _GNO_GNO_H_
#include <gno/gno.h>
#endif
static void report_stack(void)
{
fprintf(stderr,"\n ==> %d stack bytes used <== \n", _endStackCheck());
}
#endif
int
#ifndef __STDC__
main(argc, argv)
int argc;
char *argv[];
#else
main(int argc, char *argv[])
#endif
{
int ch;
char *p;
#if defined(__GNO__) && defined(__STACK_CHECK__)
_beginStackCheck();
atexit(report_stack);
#endif
/*
* 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)
switch (ch) {
case 'P':
break;
case '?':
default:
usage();
}
argc -= optind;
#ifndef __ORCAC__
argv += optind;
#else
/* ORCA/C 2.1 compiler cannot handle += on pointer */
argv = argv + optind;
#endif
if (argc != 0)
usage();
if ((p = getcwd(NULL, 0)) == NULL)
err(1, NULL);
(void)printf("%s\n", p);
exit(0);
}
void
#ifndef __STDC__
usage()
#else
usage(void)
#endif
{
(void)fprintf(stderr, "usage: pwd\n");
exit(1);
}