109 lines
3.3 KiB
Groff
109 lines
3.3 KiB
Groff
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.\" $NetBSD: ttyaction.3,v 1.15 2010/05/04 06:41:27 jruoho Exp $
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.\"
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.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Gordon W. Ross.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd May 4, 2010
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.Dt TTYACTION 3
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.Os
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.Sh NAME
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.Nm ttyaction
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.Nd ttyaction utility function
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.Sh LIBRARY
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.Lb libutil
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.Sh SYNOPSIS
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.In util.h
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.Ft int
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.Fn ttyaction "char *ttyname" "char *action" "char *username"
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.Sh DESCRIPTION
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The
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.Fn ttyaction
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function is used by
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.Xr login 1 ,
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.Xr getty 8 ,
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.Xr telnetd 8
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and
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.Xr rlogind 8
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to execute site-specific commands
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when a login session begins and ends.
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.Pp
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The
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.Fn ttyaction
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function scans the
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.Pa /etc/ttyaction
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file for any records that match the current
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.Fa ttyname
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and
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.Fa action
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parameters, and for each matching record,
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runs the shell command shown in that record.
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The record format is described in
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.Xr ttyaction 5 .
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The parameter
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.Fa username
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is the name of the new owner of the
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.Fa ttyname
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device.
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Note that the
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.Fa ttyname
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parameter may be passed as a fully qualified pathname, and the
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.Fn ttyaction
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function will skip the leading "/dev/" part of the string.
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(This is a convenience for login and getty.)
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.Sh RETURN VALUES
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.Fn ttyaction
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returns the status of the last command it executed,
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or zero if no matching commands were found.
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.Sh FILES
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.Bl -tag -width /etc/ttyaction -compact
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.It Pa /dev/\(**
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.It Pa /etc/ttyaction
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.El
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.Sh SEE ALSO
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.Xr ttyaction 5
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.Sh AUTHORS
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.An Gordon W. Ross
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.Aq gwr@NetBSD.org ,
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.An Chris G. Demetriou
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.Aq cgd@NetBSD.org ,
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.An Ty Sarna
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.Aq tsarna@NetBSD.org .
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.Sh BUGS
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There should be some
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.Em other
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mechanism to allow selection of different access control policies
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on a per-line basis.
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It has been suggested that the same
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.Fn ttyaction
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mechanism should also be used for determining access control, but
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it was decided (after much discussion) that
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.Fn ttyaction
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should only describe actions to be performed
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.Em after
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the system has decided to change the ownership of some tty.
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Access control policies will be handled by a separate mechanism.
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