As I understand it, in C, if I open (create) a file and want to lock
it, I should pass in the O_EXLOCK flag at the same time, otherwise,
I've got a race condition, another process could potentially lock the
file after I've created it, but before I've locked it.
Does Perl have this problem if I use:
open (FILE, "data.txt");
flock (FILE, 2);
Basically, I want to have a cgi that controls an external device and
I want it to read a config file to find the last user (IP) and state
of the device before trying to do anything. And being a cgi, I don't
want race issues.
James
