.\" Copyright (c) 2003 Networks Associates Technology, Inc.
.\" Copyright (c) 2004-2011 Dag-Erling Smørgrav
.\" All rights reserved.
.\"
.\" Portions of this software were developed for the FreeBSD Project by
.\" ThinkSec AS and NAI Labs, the Security Research Division of Network
.\" Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
.\" ("CBOSS"), as part of the DARPA CHATS research program.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
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.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. The name of the author may not be used to endorse or promote
.\"    products derived from this software without specific prior written
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.\" $FreeBSD: head/lib/libpam/modules/pam_group/pam_group.8 268890 2014-07-19 21:04:21Z des $
.\"
.Dd July 19, 2014
.Dt PAM_GROUP 8
.Os
.Sh NAME
.Nm pam_group
.Nd Group PAM module
.Sh SYNOPSIS
.Op Ar service-name
.Ar module-type
.Ar control-flag
.Pa pam_group
.Op Ar arguments
.Sh DESCRIPTION
The group service module for PAM accepts or rejects users based on
their membership in a particular file group.
.Nm pam_group
provides functionality for two PAM categories: authentication and
account management.
In terms of the module-type parameter, they are the ``auth'' and
``account'' features.
.Pp
The following options may be passed to the
.Nm
module:
.Bl -tag -width ".Cm fail_safe"
.It Cm deny
Reverse the meaning of the test, i.e., reject the applicant if and only
if he or she is a member of the specified group.
This can be useful to exclude certain groups of users from certain
services.
.It Cm fail_safe
If the specified group does not exist, or has no members, act as if
it does exist and the applicant is a member.
.It Cm group Ns = Ns Ar groupname
Specify the name of the group to check.
The default is
.Dq Li wheel .
.It Cm luser
Accept or reject based on the target user's group membership.
.It Cm root_only
Skip this module entirely if the target account is not the superuser
account.
.It Cm ruser
Accept or reject based on the supplicant's group membership.
This is the default.
.El
.Pp
Note that the
.Cm luser
and
.Cm ruser
options are mutually exclusive, and that
.Nm
will fail if both are specified.
.Sh SEE ALSO
.Xr pam.conf 5 ,
.Xr pam 8
.Sh AUTHORS
The
.Nm
module and this manual page were developed for the
.Fx
Project by
ThinkSec AS and NAI Labs, the Security Research Division of Network
Associates, Inc.\& under DARPA/SPAWAR contract N66001-01-C-8035
.Pq Dq CBOSS ,
as part of the DARPA CHATS research program.