\" $NetBSD: ttyaction.3,v 1.16 2021/03/21 23:29:36 mrg Exp $

\" $NetBSD: ttyaction.3,v 1.16 2021/03/21 23:29:36 mrg Exp $
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\" Copyright (c) 1996 The NetBSD Foundation, Inc.
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\" This code is derived from software contributed to The NetBSD Foundation
\" by Gordon W. Ross.
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Dd May 4, 2010
Dt TTYACTION 3
Os
Sh NAME
Nm ttyaction
Nd ttyaction utility function
Sh LIBRARY
Lb libutil
Sh SYNOPSIS
In util.h
Ft int
Fn ttyaction "char *ttyname" "char *action" "char *username"
Sh DESCRIPTION
The
Fn ttyaction
function is used by
Xr login 1 ,
Xr getty 8 ,
Xr telnetd 8
and
Xr rlogind 8
to execute site-specific commands
when a login session begins and ends.
Pp
The
Fn ttyaction
function scans the
Pa /etc/ttyaction
file for any records that match the current
Fa ttyname
and
Fa action
parameters, and for each matching record,
runs the shell command shown in that record.
The record format is described in
Xr ttyaction 5 .
The parameter
Fa username
is the name of the new owner of the
Fa ttyname
device.
Note that the
Fa ttyname
parameter may be passed as a fully qualified pathname, and the
Fn ttyaction
function will skip the leading "/dev/" part of the string.
(This is a convenience for login and getty.)
Sh RETURN VALUES
Fn ttyaction
returns the status of the last command it executed,
or zero if no matching commands were found.
Sh FILES
Bl -tag -width /etc/ttyaction -compact
It Pa /dev/\(**
It Pa /etc/ttyaction
El
Sh SEE ALSO
Xr ttyaction 5
Sh HISTORY
The
Fn ttyaction
function appeared in
Nx 1.3 .
Sh AUTHORS
An Gordon W. Ross
Aq [email protected] ,
An Chris G. Demetriou
Aq [email protected] ,
An Ty Sarna
Aq [email protected] .
Sh BUGS
There should be some
Em other
mechanism to allow selection of different access control policies
on a per-line basis.
It has been suggested that the same
Fn ttyaction
mechanism should also be used for determining access control, but
it was decided (after much discussion) that
Fn ttyaction
should only describe actions to be performed
Em after
the system has decided to change the ownership of some tty.
Access control policies will be handled by a separate mechanism.