Information for nologin-1.0:

Comment:
Refuse a login to a user, and make a note of it in syslog

Description:
This program will refuse login to a user, and make a note of it in the
system logs (syslog).  This is suitable for use as a "login shell" for
a user that you want to temporarily deny access to.  Just set that user's
shell to /usr/local/sbin/nologin.