Home | History | Annotate | Line # | Download | only in libutil
login_tty.c revision 1.5 
      1 /*-
      2  * Copyright (c) 1990, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #if defined(LIBC_SCCS) && !defined(lint)
     35 #if 0
     36 static char sccsid[] = "@(#)login_tty.c	8.1 (Berkeley) 6/4/93";
     37 #else
     38 static char rcsid[] = "$NetBSD: login_tty.c,v 1.5 1996/05/15 21:42:27 jtc Exp $";
     39 #endif
     40 #endif /* LIBC_SCCS and not lint */
     41 
     42 #include <sys/param.h>
     43 #include <sys/ioctl.h>
     44 #include <unistd.h>
     45 #include <util.h>
     46 
     47 int
     48 login_tty(fd)
     49 	int fd;
     50 {
     51 	(void) setsid();
     52 	if (ioctl(fd, TIOCSCTTY, (char *)NULL) == -1)
     53 		return (-1);
     54 	(void) dup2(fd, 0);
     55 	(void) dup2(fd, 1);
     56 	(void) dup2(fd, 2);
     57 	if (fd > 2)
     58 		(void) close(fd);
     59 	return (0);
     60 }
     61