Auditing write syscall

Hello, I would like to ask a question about auditing write syscalls. I am trying to monitor all filesystem changes in a specific directory and process the changes in near real time - audispd, was very helpful with that. What concerns me is what if a filedescriptor is kept open for long periods of time and written to once in a while? Only the open syscall is logged when using a rule like this one. auditctl -w /tmp/rnd_pop -p wa -k test_key I was thinking that maybe being more explicit about what I want to do could help like setting up a rule like this one. auditctl -a always,exit -F dir=/tmp/rnd_pop -F perm=w -F succes=1 -k test_key But it doesnt seem to work for me, I guess I cannot filter write syscall by directory because nothing ever shows up in the audit.log with a rule like this. What is the intended way to achieve logging of write syscalls in specific directory, am i missing something? Should I check myself if the file is still open when event is being processed and act accordingly? Best regards, Ondrej