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 user's ability to log in.
Use this file instead the default
/var/run/nologin or
/etc/nologin.
Return PAM_SUCCESS if no file exists, the default is PAM_IGNORE.
The user is not root and /etc/nologin
exists, so the user is not permitted to log in.
Memory buffer error.
This is the default return value.
Success: either the user is root or the nologin file does not exist.
User not known to the underlying authentication module.