hush/coreutils/usleep.c

/* vi: set sw=4 ts=4: */
/*
 * Mini usleep implementation for busybox
 *
 *
 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include "internal.h"
#include <stdlib.h>
#include <unistd.h>

const char usleep_usage[] = "usleep N\n" 
#ifndef BB_FEATURE_TRIVIAL_HELP
	"\nPause for N microseconds.\n"
#endif
	;

extern int usleep_main(int argc, char **argv)
{
	if ((argc < 2) || (**(argv + 1) == '-')) {
		usage(usleep_usage);
	}

	usleep(atoi(*(++argv)));	/* return void */
	exit(TRUE);
}