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 /*
31 * This program reads a single line from the standard input
32 * and writes it on the standard output. It is probably most useful
33 * in conjunction with the shell.
34 */
35
36 #include <limits.h>
37 #include <unistd.h>
38
39 #define LSIZE LINE_MAX /* POSIX.2 */
40
41 static char readc(void);
42
43 static int EOF;
44 static char nl = '\n';
45
46 /*ARGSUSED*/
47 int
main(int argc,char ** argv)48 main(int argc, char **argv)
49 {
50 char c;
51 char line[LSIZE];
52 char *linep, *linend;
53
54 EOF = 0;
55 linep = line;
56 linend = line + LSIZE;
57
58 while ((c = readc()) != nl) {
59 if (linep == linend) {
60 (void) write(1, line, LSIZE);
61 linep = line;
62 }
63 *linep++ = c;
64 }
65
66 /* LINTED E_PTRDIFF_T_OVERFLOW */
67 (void) write(1, line, linep-line);
68 (void) write(1, &nl, 1);
69 if (EOF == 1)
70 return (1);
71 return (0);
72 }
73
74 static char
readc(void)75 readc(void)
76 {
77 char c;
78
79 if (read(0, &c, 1) != 1) {
80 EOF = 1;
81 return (nl);
82 }
83 else
84 return (c);
85 }
86