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   pam_selinux    ( 8 )

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Имя (Name)

pam_selinux - PAM module to set the default security context

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Синопсис (Synopsis)

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

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Описание (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.

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Параметры (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.

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Предоставляемые типы модулей (Module types provided)

Only the session module type is provided.

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Возвращаемое значение (Return value)

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.

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Примеры (Examples)

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

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Смотри также (See also)

execve(2), tty(4), pam.d(5), pam(8), selinux(8)

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