/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

/*
 *      This program reads a single line from the standard input
 *      and writes it on the standard output. It is probably most useful
 *      in conjunction with the shell.
 */

#include <limits.h>
#include <unistd.h>

#define LSIZE   LINE_MAX                /* POSIX.2 */

static char     readc(void);

static int EOF;
static char nl = '\n';

/*ARGSUSED*/
int
main(int argc, char **argv)
{
        char c;
        char line[LSIZE];
        char *linep, *linend;

        EOF = 0;
        linep = line;
        linend = line + LSIZE;

        while ((c = readc()) != nl) {
                if (linep == linend) {
                        (void) write(1, line, LSIZE);
                        linep = line;
                }
                *linep++ = c;
        }

        /* LINTED  E_PTRDIFF_T_OVERFLOW */
        (void) write(1, line, linep-line);
        (void) write(1, &nl, 1);
        if (EOF == 1)
                return (1);
        return (0);
}

static char
readc(void)
{
        char c;

        if (read(0, &c, 1) != 1) {
                EOF = 1;
                return (nl);
        }
        else
                return (c);
}