1.\" 2.\" Copyright (c) 1996 Joerg Wunsch 3.\" 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" $FreeBSD: head/lib/libutil/login_tty.3 206622 2010-04-14 19:08:06Z uqs $ 27.\" " 28.Dd December 29, 1996 29.Dt LOGIN_TTY 3 30.Os 31.Sh NAME 32.Nm login_tty 33.Nd prepare a tty for a new login session 34.Sh LIBRARY 35.Lb libutil 36.Sh SYNOPSIS 37.In sys/types.h 38.In libutil.h 39.Ft int 40.Fn login_tty "int fd" 41.Sh DESCRIPTION 42The function 43.Fn login_tty 44prepares a terminal for a new login session. 45The file descriptor 46.Ar fd 47passed to 48.Fn login_tty 49must be opened for reading and writing on a terminal device. 50It will be 51made the controlling terminal for the calling process, after allocating 52a new session with 53.Xr setsid 2 . 54This terminal device will also be made the standard input, standard output, 55and standard error output of the calling process. 56.Sh RETURN VALUES 57The 58.Fn login_tty 59function returns -1 if it could not make the device referenced by 60.Ar fd 61the controlling terminal of the calling process, and 0 otherwise. 62.Sh SEE ALSO 63.Xr dup2 2 , 64.Xr ioctl 2 , 65.Xr setsid 2 , 66.Xr tty 4 67