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.Dd February 10, 2003 34.Dt PAM_CHROOT 8 35.Os 36.Sh NAME 37.Nm pam_chroot 38.Nd Chroot PAM module 39.Sh SYNOPSIS 40.Op Ar service-name 41.Ar module-type 42.Ar control-flag 43.Pa pam_chroot 44.Op Ar arguments 45.Sh DESCRIPTION 46The chroot service module for PAM chroots users into either a 47predetermined directory or one derived from their home directory. 48If a user's home directory as specified in the 49.Vt passwd 50structure returned by 51.Xr getpwnam 3 52contains the string 53.Dq Li /./ , 54the portion of the directory name to the left of that string is used 55as the chroot directory, and the portion to the right will be the 56current working directory inside the chroot tree. 57Otherwise, the directories specified by the 58.Cm dir 59and 60.Cm cwd 61options (see below) are used. 62.Bl -tag -width ".Cm also_root" 63.It Cm also_root 64Do not hold user ID 0 exempt from the chroot requirement. 65.It Cm always 66Report a failure if a chroot directory could not be derived from the 67user's home directory, and the 68.Cm dir 69option was not specified. 70.It Cm cwd Ns = Ns Ar directory 71Specify the directory to 72.Xr chdir 2 73into after a successful 74.Xr chroot 2 75call. 76.It Cm dir Ns = Ns Ar directory 77Specify the chroot directory to use if one could not be derived from 78the user's home directory. 79.El 80.Sh SEE ALSO 81.Xr pam.conf 5 , 82.Xr pam 3 83.Sh AUTHORS 84The 85.Nm 86module and this manual page were developed for the 87.Fx 88Project by 89ThinkSec AS and NAI Labs, the Security Research Division of Network 90Associates, Inc.\& under DARPA/SPAWAR contract N66001-01-C-8035 91.Pq Dq CBOSS , 92as part of the DARPA CHATS research program. 93