1 /* $NetBSD: login_tty.c,v 1.13 2011/09/16 16:13:16 plunky Exp $ */
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid
[] = "@(#)login_tty.c 8.1 (Berkeley) 6/4/93";
37 __RCSID("$NetBSD: login_tty.c,v 1.13 2011/09/16 16:13:16 plunky Exp $");
39 #endif /* LIBC_SCCS and not lint */
41 #include <sys/param.h>
42 #include <sys/ioctl.h>
53 _DIAGASSERT(fd
!= -1);
56 if (ioctl(fd
, TIOCSCTTY
, NULL
) == -1)
58 (void) dup2(fd
, STDIN_FILENO
);
59 (void) dup2(fd
, STDOUT_FILENO
);
60 (void) dup2(fd
, STDERR_FILENO
);
61 if (fd
!= STDIN_FILENO
&& fd
!= STDOUT_FILENO
&& fd
!= STDERR_FILENO
)