+.SH EXIT STATUS
+The command uses
+.B sysexits.h
+exit status values for everything, except when using either of the options
+.B \-n
+or
+.B \-w
+which report a failure to acquire the lock with a exit status given by the
+.B \-E
+option, or 1 by default.
+.PP
+When using the \fIcommand\fR variant, and executing the child worked, then
+the exit status is that of the child command.