.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.\" @(#)flock.2 8.1 (Berkeley) 6/4/93
+.\" @(#)flock.2 8.2 (Berkeley) 12/11/93
.\"
-.Dd June 4, 1993
+.Dd December 11, 1993
.Dt FLOCK 2
.Os BSD 4.2
.Sh NAME
.Fa fd .
A lock is applied by specifying an
.Fa operation
-parameter that is the inclusive or of
+parameter that is one of
.Dv LOCK_SH
or
.Dv LOCK_EX
-and, possibly,
+with the optional addition of
.Dv LOCK_NB .
To unlock
an existing lock