4.4BSD/usr/src/sys/i386/floppy/cp/cp.c

/*-
 * Copyright (c) 1991, 1993
 *	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.
 *
 *	@(#)cp.c	8.1 (Berkeley) 6/11/93
 */

#include <fcntl.h>

int eval;

main(argc, argv)
	int argc;
	char **argv;
{
	register int from, to, nr;
	char buf[2048];

	if (*++argv && **argv == '-') {
		err("no options available", 0);
		_exit(1);
	}
	if (argc != 3) {
		err("usage: cp file1 file2", 0);
		_exit(1);
	}
	if ((from = open(argv[0], O_RDONLY, 0)) < 0)
		err(argv[0], 1);
	else if ((to = open(argv[1], O_CREAT|O_TRUNC|O_WRONLY, 0666)) < 0)
		err(argv[1], 1);
	else {
		while ((nr = read(from, buf, sizeof(buf))) > 0)
			if (write(to, buf, nr) != nr) {
				err(argv[1], 1);
				break;
			}
		if (nr == -1)
			err(argv[0], 1);
	}
	_exit(eval);
}

#define	PROGNAME	"cp: "
#include "errfunction"