pam_wheel (8)
Leading comments
Title: pam_wheel
Author: [see the "AUTHOR" section]
Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
Date: 09/19/2013
Manual: Linux-PAM Manual
Source: Linux-PAM Manual
Language: English
NAME
pam_wheel - Only permit root access to members of group wheelSYNOPSIS
- pam_wheel.so [debug] [deny] [group=name] [root_only] [trust]
DESCRIPTION
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).
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.
PAM_USER_UNKNOWN
- User not known.
EXAMPLES
The root account gains access by default (rootok), only wheel members can become root (wheel) but Unix authenticate non-root applicants.
-
su auth sufficient pam_rootok.so su auth required pam_wheel.so su auth required pam_unix.so
SEE ALSO
AUTHOR
pam_wheel was written by Cristian Gafton <gafton@redhat.com>.