https://raveenkumar.com/tags/lockfile/ Recent content in Lockfile on Raveen Kumar Hugo en-US Raveen Kumar Fri, 17 Feb 2023 00:00:00 +0000 https://raveenkumar.com/library/programming/lockfile/ Fri, 17 Feb 2023 00:00:00 +0000 https://raveenkumar.com/library/programming/lockfile/ <h2 id="lockfile"><code>lockfile</code></h2> <h3 id="installation">Installation</h3> <p><code>sudo apt install procmail</code></p> <h3 id="description">Description</h3> <p><code>man lockfile</code></p> <p>Suppose you want to make sure that access to the file &ldquo;important&rdquo; is serialised, i.e., no more than one program or shell script should be allowed to access it. For simplicity&rsquo;s sake, let&rsquo;s suppose that it is a shell script. In this case you could solve it like this:</p> <pre><code>... lockfile important.lock ... access_&quot;important&quot;_to_your_hearts_content ... rm -f important.lock ... </code></pre> <p>Now if all the scripts that access &ldquo;important&rdquo; follow this guideline, you will be assured that at most one script will be executing between the <code>lockfile</code> and the <code>rm</code> commands.</p>