The chroot service module for PAM chroots users into either a
predetermined directory or one derived from their home directory.
If a user's home directory as specified in the
Vt passwd
structure returned by
getpwnam(3)
contains the string
``/./
''
the portion of the directory name to the left of that string is used
as the chroot directory, and the portion to the right will be the
current working directory inside the chroot tree.
Otherwise, the directories specified by the
dir
and
cwd
options (see below) are used.
also_root
Do not hold user ID 0 exempt from the chroot requirement.
always
Report a failure if a chroot directory could not be derived from the
user's home directory, and the
dir
option was not specified.
cwd = directory
Specify the directory to
chdir(2)
into after a successful
chroot(2)
call.
dir = directory
Specify the chroot directory to use if one could not be derived from
the user's home directory.
The
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
(``CBOSS''
)
as part of the DARPA CHATS research program.
