prettyness police

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

/*
* Copyright (c) 1988, 1993
*      The Regents of the University of California.  All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1988, 1993\n\
       The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)sleep.c     8.2 (Berkeley) %G%";
#endif /* not lint */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

void usage __P((void));

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

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

       if (argc != 1)
               usage();

       if ((secs = atoi(*argv)) > 0)
               (void)sleep(secs);
       exit(0);
}

void
usage()
{

       (void)fprintf(stderr, "usage: sleep seconds\n");
       exit(1);
}