xref: /titanic_41/usr/src/lib/libbc/libc/gen/common/isatty.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
#pragma ident	"%Z%%M%	%I%	%E% SMI"  /* from S5R3 1.7 */
/*	Copyright (c) 1984 AT&T	*/
/*	  All Rights Reserved  	*/


/*LINTLIBRARY*/
/*
 * Returns 1 iff file is a tty
 */
#include <sys/termio.h>

extern int ioctl();
extern int errno;

int
isatty(f)
int	f;
{
	struct termio tty;
	int err ;

	err = errno;
	if(ioctl(f, TCGETA, &tty) < 0)
	{
		errno = err;
		return(0);
	}
	return(1);
}