Try to see if you can take a lock on it. If you can't, it's locked. 
use Fcntl ':flock';

if ( flock( $filename, LOCK_EX | LOCK_NB ) ) {
    # File is unlocked
    flock( $filename, LOCK_UN );
}
else {
    # File is locked.
}

[download]
My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?

In reply to Re: Detecting locked files in Windows by dragonchild
in thread Detecting locked files in Windows by moggs

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