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PAM_SUCCEED_IF(8) Linux-PAM PAM_SUCCEED_IF(8)

NAME

pam_succeed_if - test account characteristics

SYNOPSIS

pam_succeed_if.so [ flag...] [condition...]

DESCRIPTION

pam_succeed_if.so is designed to succeed or fail authentication based on characteristics of the account belonging to the user being authenticated. 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:
debug
Turns 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.
quiet
Don'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 and service:
field < number
Field 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 =~ glob
Field matches the given glob.
field !~ glob
Field 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
User is in given group.
user notingroup group
User is not in given group.
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 ( account, auth, password and session) are provided.

RETURN VALUES

PAM_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:
 
auth required pam_succeed_if.so quiet user ingroup wheel
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 ALSO

 
glob(7), pam(7)

AUTHOR

Nalin Dahyabhai <nalin@redhat.com>
06/04/2011 Linux-PAM