          pam_selinux — PAM module to set the default security context

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DESCRIPTION

   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.

OPTIONS

   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.

EXAMPLES

 auth     required  pam_unix.so
 session  required  pam_permit.so
 session  optional  pam_selinux.so


AUTHOR

   pam_selinux was written by Dan Walsh <dwalsh@redhat.com>.
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