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PAM_WHEEL(8)                                       Linux-PAM Manual                                      PAM_WHEEL(8)



NAME
       pam_wheel - Only permit root access to members of group wheel

SYNOPSIS
       pam_wheel.so [debug] [deny] [group=name] [root_only] [trust] [use_uid]

DESCRIPTION
       The pam_wheel PAM module is used to enforce the so-called wheel group. By default it permits root access to
       the system if the applicant user is a member of the wheel group. If no group with this name exist, the module
       is using the group with the group-ID 0.

OPTIONS
       debug
           Print debug information.

       deny
           Reverse the sense of the auth operation: if the user is trying to get UID 0 access and is a member of the
           wheel group (or the group of the group option), deny access. Conversely, if the user is not in the group,
           return PAM_IGNORE (unless trust was also specified, in which case we return PAM_SUCCESS).

       group=name
           Instead of checking the wheel or GID 0 groups, use the name group to perform the authentication.

       root_only
           The check for wheel membership is done only.

       trust
           The pam_wheel module will return PAM_SUCCESS instead of PAM_IGNORE if the user is a member of the wheel
           group (thus with a little play stacking the modules the wheel members may be able to su to root without
           being prompted for a passwd).

       use_uid
           The check for wheel membership will be done against the current uid instead of the original one (useful
           when jumping with su from one account to another for example).

MODULE TYPES PROVIDED
       The auth and account module types are provided.

RETURN VALUES
       PAM_AUTH_ERR
           Authentication failure.

       PAM_BUF_ERR
           Memory buffer error.

       PAM_IGNORE
           The return value should be ignored by PAM dispatch.

       PAM_PERM_DENY
           Permission denied.

       PAM_SERVICE_ERR
           Cannot determine the user name.

       PAM_SUCCESS
           Success.


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

AUTHOR
       pam_wheel was written by Cristian Gafton <[email protected]>.



Linux-PAM Manual                                      09/19/2013                                         PAM_WHEEL(8)