nstructor">UnixLabels</span>.lock_command&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;len:int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;kill&nbsp;:&nbsp;pid:int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;signal:int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;sigprocmask_command&nbsp;=<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="constructor">Unix</span>.sigprocmask_comman