.TH testfilelock 1
.SH NAME
testfilelock \- check whether a file is locked
.SH SYNOPSIS
.B testfilelock
.I fn
.SH DESCRIPTION
.B testfilelock
attempts to obtain a lock on
.IR fn .
.I fn
must exist and be writable for
.BR testfilelock .

If
.B testfilelock
can obtain the lock,
it immediately exits 100.
Otherwise it immediately exits 0.
On temporary errors it exits 111.
.SH "SEE ALSO"
flock(2),
lockf(3)