add getopt front-end

[unix-history] / usr / src / bin / pwd / pwd.c

/*
* Copyright (c) 1991 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1991 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)pwd.c       5.5 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>

void usage __P((void));

int
main(argc, argv)
       int argc;
       char *argv[];
{
       int ch;
       char *p;

       while ((ch = getopt(argc, argv, "")) != EOF)
               switch(ch) {
               case '?':
               default:
                       usage();
               }
       argc -= optind;
       argv += optind;

       if (argc != 0)
               usage();

       p = getcwd(NULL, 0);
       if (p) {
               (void)printf("%s\n", p);
               exit(0);
       }
       (void)fprintf(stderr, "pwd: %s\n", strerror(errno));
       exit(1);
}

void
usage()
{
       (void)fprintf(stderr, "usage: pwd\n");
       exit(1);
}