ETLK</code>|If you want to only check to see if there is a lock, but don’t want to set one, you can use this command. It looks through all the file locks until it finds one that conflicts with the lock you specified in the <code>struct flock</code>. It then copies the conflicting lock’s information into the <code>struct</code> and returns it to you. If it can’t find a conflicting lock, <code>fcntl()</code> returns the <code>struct</code> as you passed it, except it sets the <code>l_type</code> field t