pam_succeed_if8Linux-PAMLinux-PAM Manualpam_succeed_iftest account characteristicspam_succeed_if.soflagconditionDESCRIPTION
pam_succeed_if.so is designed to succeed or fail authentication
based on characteristics of the account belonging to the user being
authenticated or values of other PAM items. One use is to select whether
to load other modules based on this test.
The module should be given one or more conditions as module arguments,
and authentication will succeed only if all of the conditions are met.
OPTIONS
The following flags are supported:
debugTurns on debugging messages sent to syslog.use_uid
Evaluate conditions using the account of the user whose UID
the application is running under instead of the user being
authenticated.
quietDon't log failure or success to the system log.quiet_fail
Don't log failure to the system log.
quiet_success
Don't log success to the system log.
audit
Log unknown users to the system log.
Conditions are three words: a field, a test,
and a value to test for.
Available fields are user,
uid, gid,
shell, home,
ruser, rhost,
tty and service:
field < numberField has a value numerically less than number.field <= number
Field has a value numerically less than or equal to number.
field eq number
Field has a value numerically equal to number.
field >= number
Field has a value numerically greater than or equal to number.
field > number
Field has a value numerically greater than number.
field ne number
Field has a value numerically different from number.
field = string
Field exactly matches the given string.
field != string
Field does not match the given string.
field =~ globField matches the given glob.field !~ globField does not match the given glob.field in item:item:...Field is contained in the list of items separated by colons.field notin item:item:...Field is not contained in the list of items separated by colons.user ingroup group[:group:....]User is in given group(s).user notingroup group[:group:....]User is not in given group(s).user innetgr netgroup(user,host) is in given netgroup.user notinnetgr group(user,host) is not in given netgroup.MODULE TYPES PROVIDED
All module types (, ,
and ) are provided.
RETURN VALUESPAM_SUCCESS
The condition was true.
PAM_AUTH_ERR
The condition was false.
PAM_SERVICE_ERR
A service error occurred or the arguments can't be
parsed correctly.
EXAMPLES
To emulate the behaviour of pam_wheel, except
there is no fallback to group 0 being only approximated by checking also the root group membership:
auth required pam_succeed_if.so quiet user ingroup wheel:root
Given that the type matches, only loads the othermodule rule if
the UID is over 500. Adjust the number after default to skip
several rules.
type [default=1 success=ignore] pam_succeed_if.so quiet uid > 500
type required othermodule.so arguments...
SEE ALSOglob7,
pam8AUTHORNalin Dahyabhai <nalin@redhat.com>