my $lock = "/var/www/html/shhabcam/LOGS/lock_file.txt";
         sysopen LOCK, $lock, O_CREAT or die "Can't sysopen $lock: $!"
+;
         flock LOCK, LOCK_EX or die "Can't flock $lock: $!";

[download]

this blocks successfully with two users...does it have any issues with 6 or more users?

In reply to 'flock' with multiple users by Anonymous Monk

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