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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | MODULE TYPES PROVIDED | RETURN VALUES | EXAMPLES | SEE ALSO | AUTHOR | COLOPHON |
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PAM_SELINUX(8) Linux-PAM Manual PAM_SELINUX(8)
pam_selinux - PAM module to set the default security context
pam_selinux.so [open] [close] [restore] [nottys] [debug] [verbose]
[select_context] [env_params] [use_current_range]
pam_selinux is a PAM module that sets up the default SELinux
security context for the next executed process.
When a new session is started, the open_session part of the module
computes and sets up the execution security context used for the
next execve(2) call, the file security context for the controlling
terminal, and the security context used for creating a new kernel
keyring.
When the session is ended, the close_session part of the module
restores old security contexts that were in effect before the
change made by the open_session part of the module.
Adding pam_selinux into the PAM stack might disrupt behavior of
other PAM modules which execute applications. To avoid that,
pam_selinux.so open should be placed after such modules in the PAM
stack, and pam_selinux.so close should be placed before them. When
such a placement is not feasible, pam_selinux.so restore could be
used to temporary restore original security contexts.
open
Only execute the open_session part of the module.
close
Only execute the close_session part of the module.
restore
In open_session part of the module, temporarily restore the
security contexts as they were before the previous call of the
module. Another call of this module without the restore option
will set up the new security contexts again.
nottys
Do not setup security context of the controlling terminal.
debug
Turn on debug messages via syslog(3).
verbose
Attempt to inform the user when security context is set.
select_context
Attempt to ask the user for a custom security context role. If
MLS is on, ask also for sensitivity level.
env_params
Attempt to obtain a custom security context role from PAM
environment. If MLS is on, obtain also sensitivity level. This
option and the select_context option are mutually exclusive.
The respective PAM environment variables are
SELINUX_ROLE_REQUESTED, SELINUX_LEVEL_REQUESTED, and
SELINUX_USE_CURRENT_RANGE. The first two variables are self
describing and the last one if set to 1 makes the PAM module
behave as if the use_current_range was specified on the
command line of the module.
use_current_range
Use the sensitivity level of the current process for the user
context instead of the default level. Also suppresses asking
of the sensitivity level from the user or obtaining it from
PAM environment.
Only the session module type is provided.
PAM_SUCCESS
The security context was set successfully.
PAM_SESSION_ERR
Unable to get or set a valid context.
PAM_USER_UNKNOWN
The user is not known to the system.
PAM_BUF_ERR
Memory allocation error.
auth required pam_unix.so
session required pam_permit.so
session optional pam_selinux.so
execve(2), tty(4), pam.d(5), pam(8), selinux(8)
pam_selinux was written by Dan Walsh <dwalsh@redhat.com>.
This page is part of the linux-pam (Pluggable Authentication
Modules for Linux) project. Information about the project can be
found at ⟨http://www.linux-pam.org/⟩. If you have a bug report
for this manual page, see ⟨//www.linux-pam.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://github.com/linux-pam/linux-pam.git⟩ on 2023-12-22. (At
that time, the date of the most recent commit that was found in
the repository was 2023-12-18.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Linux-PAM Manual 12/22/2023 PAM_SELINUX(8)
Pages that refer to this page: pam_selinux_check(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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