158f0484fSRodney W. Grimes /* 258f0484fSRodney W. Grimes * Copyright (c) 1988, 1993 358f0484fSRodney W. Grimes * The Regents of the University of California. All rights reserved. 458f0484fSRodney W. Grimes * 558f0484fSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 658f0484fSRodney W. Grimes * modification, are permitted provided that the following conditions 758f0484fSRodney W. Grimes * are met: 858f0484fSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 958f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 1058f0484fSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 1158f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 1258f0484fSRodney W. Grimes * documentation and/or other materials provided with the distribution. 1358f0484fSRodney W. Grimes * 3. All advertising materials mentioning features or use of this software 1458f0484fSRodney W. Grimes * must display the following acknowledgement: 1558f0484fSRodney W. Grimes * This product includes software developed by the University of 1658f0484fSRodney W. Grimes * California, Berkeley and its contributors. 1758f0484fSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 1858f0484fSRodney W. Grimes * may be used to endorse or promote products derived from this software 1958f0484fSRodney W. Grimes * without specific prior written permission. 2058f0484fSRodney W. Grimes * 2158f0484fSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2258f0484fSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2358f0484fSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2458f0484fSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2558f0484fSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2658f0484fSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2758f0484fSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2858f0484fSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2958f0484fSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3058f0484fSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3158f0484fSRodney W. Grimes * SUCH DAMAGE. 3258f0484fSRodney W. Grimes */ 3358f0484fSRodney W. Grimes 3458f0484fSRodney W. Grimes #if defined(LIBC_SCCS) && !defined(lint) 3558f0484fSRodney W. Grimes static char sccsid[] = "@(#)isatty.c 8.1 (Berkeley) 6/4/93"; 3658f0484fSRodney W. Grimes #endif /* LIBC_SCCS and not lint */ 3758f0484fSRodney W. Grimes 3858f0484fSRodney W. Grimes #include <termios.h> 3958f0484fSRodney W. Grimes #include <unistd.h> 40f70177e7SJulian Elischer #ifdef _THREAD_SAFE 41f70177e7SJulian Elischer #include <pthread.h> 42f70177e7SJulian Elischer #include "pthread_private.h" 43f70177e7SJulian Elischer #endif 4458f0484fSRodney W. Grimes 4558f0484fSRodney W. Grimes int 4658f0484fSRodney W. Grimes isatty(fd) 4758f0484fSRodney W. Grimes int fd; 4858f0484fSRodney W. Grimes { 49f70177e7SJulian Elischer int retval; 5058f0484fSRodney W. Grimes struct termios t; 5158f0484fSRodney W. Grimes 52f70177e7SJulian Elischer #ifdef _THREAD_SAFE 53f70177e7SJulian Elischer if (_thread_fd_lock(fd, FD_READ, NULL,__FILE__,__LINE__) == 0) { 54f70177e7SJulian Elischer #endif 55f70177e7SJulian Elischer retval = (tcgetattr(fd, &t) != -1); 56f70177e7SJulian Elischer #ifdef _THREAD_SAFE 57f70177e7SJulian Elischer _thread_fd_unlock(fd, FD_READ); 58f70177e7SJulian Elischer } else { 59f70177e7SJulian Elischer retval = 0; 60f70177e7SJulian Elischer } 61f70177e7SJulian Elischer #endif 62f70177e7SJulian Elischer return(retval); 6358f0484fSRodney W. Grimes } 64