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 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R3 1.7 */ 23 /* Copyright (c) 1984 AT&T */ 24 /* All Rights Reserved */ 25 26 27 /*LINTLIBRARY*/ 28 /* 29 * Returns 1 iff file is a tty 30 */ 31 #include <sys/termio.h> 32 33 extern int ioctl(); 34 extern int errno; 35 36 int 37 isatty(f) 38 int f; 39 { 40 struct termio tty; 41 int err ; 42 43 err = errno; 44 if(ioctl(f, TCGETA, &tty) < 0) 45 { 46 errno = err; 47 return(0); 48 } 49 return(1); 50 } 51