PAM_SELINUX(8)							 Linux-PAM Manual						    PAM_SELINUX(8)

NAME

       pam_selinux - PAM module to set the default security context

SYNOPSIS

       pam_selinux.so [close] [debug] [open] [nottys] [verbose] [select_context] [env_params] [use_current_range]

DESCRIPTION

       In a nutshell, pam_selinux sets up the default security context for the next execed shell.

       When an application opens a session using pam_selinux, the shell that gets executed will be run in the default security context, or if the
       user chooses and the pam file allows the selected security context. Also the controlling tty will have it's security context modified to
       match the users.

       Adding pam_selinux into a pam file could cause other pam modules to change their behavior if the exec another application. The close and
       open option help mitigate this problem. close option will only cause the close portion of the pam_selinux to execute, and open will only
       cause the open portion to run. You can add pam_selinux to the config file twice. Add the pam_selinux close as the executes the open pass
       through the modules, pam_selinux open_session will happen last. When PAM executes the close pass through the modules pam_selinux
       close_session will happen first.

OPTIONS

       close
	   Only execute the close_session portion of the module.

       debug
	   Turns on debugging via syslog(3).

       open
	   Only execute the open_session portion of the module.

       nottys
	   Do not try to setup the ttys security context.

       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.

MODULE TYPES PROVIDED

       Only the session module type is provided.

RETURN VALUES

       PAM_AUTH_ERR
	   Unable to get or set a valid context.

       PAM_SUCCESS
	   The security context was set successfully.

       PAM_USER_UNKNOWN
	   The user is not known to the system.

EXAMPLES

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

SEE ALSO

       pam.conf(5), pam.d(5), pam(8)

AUTHOR

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

Linux-PAM Manual						    06/16/2009							    PAM_SELINUX(8)