isatty.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:3k
- /*
- * Copyright (c) 1988 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #if defined(LIBC_SCCS) && !defined(lint)
- /*static char *sccsid = "from: @(#)isatty.c 5.6 (Berkeley) 2/23/91";*/
- static char *rcsid = "$Id$";
- #endif /* LIBC_SCCS and not lint */
- #include <pthread.h>
- #ifdef sunos4
- #include <sys/termio.h>
- #else
- #include <termios.h>
- #endif
- #include <unistd.h>
- /*
- * If TIOCGETA is not defined try TCGETATTR
- * If TCGETATTR is not defined try TCGETA
- * If that doesn't work try getting it from termio.h
- */
- #ifndef TIOCGETA
- #ifdef TCGETATTR
- #define TIOCGETA TCGETATTR
- #else
- #ifndef TCGETA
- #include <termio.h>
- #endif
- #ifndef TIOCGETA
- #define TIOCGETA TCGETA
- #endif
- #endif
- #endif
- /* fd is the real fd to pass to the kernel */
- int isatty_basic(int fd)
- {
- #ifdef sunos4
- struct termio t;
- #else /* !sunos4 */
- struct termios t;
- #endif /* sunos4 */
- return (machdep_sys_ioctl(fd,
- #ifdef sunos4
- TCGETA,
- #else /* !sunos4 */
- TIOCGETA,
- #endif /* sunos4 */
- &t) ? 0 : 1);
- }
- int isatty(int fd)
- {
- int ret;
- if ((ret = fd_lock(fd, FD_READ, NULL)) == OK) {
- ret = isatty_basic(fd_table[fd]->fd.i);
- fd_unlock(fd, FD_READ);
- } else {
- /* Return 0 or 1 */
- ret = 0;
- }
- return(ret);
- }