1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32/*
33 *	This program reads a single line from the standard input
34 *	and writes it on the standard output. It is probably most useful
35 *	in conjunction with the shell.
36 */
37
38#include <limits.h>
39#include <unistd.h>
40
41#define	LSIZE	LINE_MAX		/* POSIX.2 */
42
43static char	readc(void);
44
45static int EOF;
46static char nl = '\n';
47
48/*ARGSUSED*/
49int
50main(int argc, char **argv)
51{
52	char c;
53	char line[LSIZE];
54	char *linep, *linend;
55
56	EOF = 0;
57	linep = line;
58	linend = line + LSIZE;
59
60	while ((c = readc()) != nl) {
61		if (linep == linend) {
62			(void) write(1, line, LSIZE);
63			linep = line;
64		}
65		*linep++ = c;
66	}
67
68	/* LINTED  E_PTRDIFF_T_OVERFLOW */
69	(void) write(1, line, linep-line);
70	(void) write(1, &nl, 1);
71	if (EOF == 1)
72		return (1);
73	return (0);
74}
75
76static char
77readc(void)
78{
79	char c;
80
81	if (read(0, &c, 1) != 1) {
82		EOF = 1;
83		return (nl);
84	}
85	else
86		return (c);
87}
88