If you have the PID, then the shell command lsof -p will list all files opened by that PID. Also, lsof <filename> will list the processes that have opened a specific file. Etc.

lsof is a very powerful command, and it requires root access, so you'll have to provide password-less sudo access for the user executing the script in order for this solution to work.

In reply to Re: Finding out by one process a filename opened by another process. by Jeppe
in thread Finding out by one process a filename opened by another process. by humble

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