Question

I have some child processes which should write some logs into a common file. I am wondering if this code work so that the processes will write into the common file without collisions:

sub appendLogs {
    open FILE, "+>>", $DMP or die "$!";
    flock FILE, LOCK_EX or die "$!";
    print FILE "xyz\n";
    close FILE;
}

If not, could you give me any hints, how I could fix or improve it?

Answer 1

Yes, as long as every process that tries to write to file uses flock, they will go without collisions.