pam_nologin - Prevent non-root users from login
pam_nologin.so [file=/path/nologin
]
[successok]
pam_nologin is a PAM module that prevents users from logging into the system when /var/run/nologin or /etc/nologin exists. The contents of the file are displayed to the user. The pam_nologin module has no effect on the root users ability to log in.
file=/path/nologin
Use this file instead the default /var/run/nologin or /etc/nologin.
successok
Return PAM_SUCCESS if no file exists, the default is PAM_IGNORE.
The auth and account module types are provided.
PAM_AUTH_ERR
The user is not root and /etc/nologin exists, so the user is not permitted to log in.
PAM_BUF_ERR
Memory buffer error.
PAM_IGNORE
This is the default return value.
PAM_SUCCESS
Success: either the user is root or the nologin file does not exist.
PAM_USER_UNKNOWN
User not known to the underlying authentication module.
In order to make this module effective, all login methods should be
secured by it. It should be used as a required
method listed
before any sufficient
methods in order to get standard Unix
nologin semantics. Note, the use of successok module
argument causes the module to return PAM_SUCCESS
and as such
would break such a configuration - failing sufficient
modules
would lead to a successful login because the nologin module
succeeded
.
pam_nologin was written by Michael K. Johnson <johnsonm@redhat.com>.