login_tty.c revision 202500
11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1990, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 131573Srgrimes * 4. Neither the name of the University nor the names of its contributors 141573Srgrimes * may be used to endorse or promote products derived from this software 151573Srgrimes * without specific prior written permission. 161573Srgrimes * 171573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271573Srgrimes * SUCH DAMAGE. 281573Srgrimes */ 291573Srgrimes 3084225Sdillon#include <sys/cdefs.h> 3184225Sdillon__FBSDID("$FreeBSD: head/lib/libutil/login_tty.c 202500 2010-01-17 17:52:35Z ed $"); 3284225Sdillon 331573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 3428179Ssteve#if 0 351573Srgrimesstatic char sccsid[] = "@(#)login_tty.c 8.1 (Berkeley) 6/4/93"; 3628179Ssteve#endif 371573Srgrimes#endif /* LIBC_SCCS and not lint */ 381573Srgrimes 391573Srgrimes#include <sys/param.h> 401573Srgrimes 41116344Smarkm#include <libutil.h> 42116344Smarkm#include <stdlib.h> 43191882Sed#include <termios.h> 4413137Speter#include <unistd.h> 4513137Speter 4613137Speterint 47121193Smarkmlogin_tty(int fd) 481573Srgrimes{ 49191882Sed pid_t s; 50191882Sed 51191882Sed s = setsid(); 52191882Sed if (s == -1) 53202500Sed s = getsid(0); 54191882Sed if (tcsetsid(fd, s) == -1) 55191882Sed return (-1); 561573Srgrimes (void) dup2(fd, 0); 571573Srgrimes (void) dup2(fd, 1); 581573Srgrimes (void) dup2(fd, 2); 591573Srgrimes if (fd > 2) 601573Srgrimes (void) close(fd); 611573Srgrimes return (0); 621573Srgrimes} 63