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 43 static char readc(void); 44 45 static int EOF; 46 static char nl = '\n'; 47 48 /*ARGSUSED*/ 49 int 50 main(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 76 static char 77 readc(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