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 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 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