xref: /original-bsd/lib/libc/gen/isatty.c (revision bac379f5) 
1 /*
2  * Copyright (c) 1988, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * %sccs.include.redist.c%
6  */
7 
8 #if defined(LIBC_SCCS) && !defined(lint)
9 static char sccsid[] = "@(#)isatty.c	8.1 (Berkeley) 06/04/93";
10 #endif /* LIBC_SCCS and not lint */
11 
12 #include <termios.h>
13 #include <unistd.h>
14 
15 int
isatty(fd)16 isatty(fd)
17 	int fd;
18 {
19 	struct termios t;
20 
21 	return(tcgetattr(fd, &t) != -1);
22 }
23