Patches from Liam Foy:

- Add new -C option to 'usermod'. This allows a quick way to temporary
  lock a users account. This is similar to how FreeBSD do it using
  'adduser'. This function can be very handy to administrators!
- Import a function to check if the inputted class actually exists. It
  contains my modifications to test whether /etc/login.conf exists
  in the first place. -OpenBSD

usr.sbin/user/usermod.8

@@ -1,4 +1,4 @@
-.\" $NetBSD: usermod.8,v 1.20 2005/02/05 15:28:46 wiz Exp $ */
+.\" $NetBSD: usermod.8,v 1.21 2005/07/27 19:09:21 christos Exp $ */
 .\"
 .\"
 .\" Copyright (c) 1999 Alistair G. Crooks.  All rights reserved.
@@ -31,7 +31,7 @@
 .\" SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
 .\"
-.Dd September 5, 2001
+.Dd July 27, 2005
 .Dt USERMOD 8
 .Os
 .Sh NAME
@@ -40,6 +40,7 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl Smov
+.Op Fl C Ar yes/no
 .Op Fl G Ar secondary-group
 .Op Fl c Ar comment
 .Op Fl d Ar home-dir
@@ -72,6 +73,11 @@ the following command line options are processed:
 is the secondary group to which the user will be added in the
 .Pa /etc/group
 file.
+.It Fl C Ar yes/no
+this enables user accounts to be temporary locked/closed. The
+.Ar yes/no
+operand can be given as 'yes' to lock the account or 'no' to
+unlock the account.
 .It Fl S
 allows samba user names with a trailing dollar sign to be
 modified.