freebsd-dev/lib/libutil/login_tty.3
1997-02-22 15:12:41 +00:00

67 lines
2.2 KiB
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.\"
.\" Copyright (c) 1996 Joerg Wunsch
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.Dd December 29, 1996
.Os
.Dt LOGIN_TTY 3
.Sh NAME
.Nm login_tty
.Nd prepare a tty for a new login session
.Sh SYNOPSIS
.Fd #include <libutil.h>
.Ft int
.Fn login_tty "int fd"
.Pp
Link with
.Va -lutil
on the
.Xr cc 1
command line.
.Sh DESCRIPTION
The function
.Fn login_tty
prepares a terminal for a new login session. The file descriptor
.Ar fd
passed to
.Fn login_tty
must be opened for reading and writing on a terminal device. It will be
made the controlling terminal for the calling process, after allocating
a new session with
.Xr setsid 2 .
This terminal device will also be made the standard input, standard output,
and standard error output of the calling process.
.Sh RETURN VALUES
.Fn Login_tty
returns -1 if it could not make the device referenced by
.Ar fd
the controlling terminal of the calling process, and 0 otherwise.
.Sh SEE ALSO
.Xr dup2 2 ,
.Xr ioctl 2 ,
.Xr setsid 2 ,
.Xr tty 4