1.\" Copyright (c) 2003 Networks Associates Technology, Inc. 2.\" All rights reserved. 3.\" 4.\" Portions of this software were developed for the FreeBSD Project by 5.\" ThinkSec AS and NAI Labs, the Security Research Division of Network 6.\" Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 7.\" ("CBOSS"), as part of the DARPA CHATS research program. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. The name of the author may not be used to endorse or promote 18.\" products derived from this software without specific prior written 19.\" permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" $FreeBSD$ 34.\" 35.Dd February 10, 2003 36.Dt PAM_CHROOT 8 37.Os 38.Sh NAME 39.Nm pam_chroot 40.Nd Chroot PAM module 41.Sh SYNOPSIS 42.Op Ar service-name 43.Ar module-type 44.Ar control-flag 45.Pa pam_chroot 46.Op Ar arguments 47.Sh DESCRIPTION 48The chroot service module for PAM chroots users into either a 49predetermined directory or one derived from their home directory. 50If a user's home directory as specified in the 51.Vt passwd 52structure returned by 53.Xr getpwnam 3 54contains the string 55.Dq Li /./ , 56the portion of the directory name to the left of that string is used 57as the chroot directory, and the portion to the right will be the 58current working directory inside the chroot tree. 59Otherwise, the directories specified by the 60.Cm dir 61and 62.Cm cwd 63options (see below) are used. 64.Bl -tag -width ".Cm also_root" 65.It Cm also_root 66Do not hold user ID 0 exempt from the chroot requirement. 67.It Cm always 68Report a failure if a chroot directory could not be derived from the 69user's home directory, and the 70.Cm dir 71option was not specified. 72.It Cm cwd Ns = Ns Ar directory 73Specify the directory to 74.Xr chdir 2 75into after a successful 76.Xr chroot 2 77call. 78.It Cm dir Ns = Ns Ar directory 79Specify the chroot directory to use if one could not be derived from 80the user's home directory. 81.El 82.Sh SEE ALSO 83.Xr pam.conf 5 , 84.Xr pam 8 85.Sh AUTHORS 86The 87.Nm 88module and this manual page were developed for the 89.Fx 90Project by 91ThinkSec AS and NAI Labs, the Security Research Division of Network 92Associates, Inc.\& under DARPA/SPAWAR contract N66001-01-C-8035 93.Pq Dq CBOSS , 94as part of the DARPA CHATS research program. 95