How do I find the file handles that my process has opened in Linux?

Question

When we perform a fork in Unix, open file handles are inherited, and if we don\'t need to use them we should close them. However, when we use libraries, file handles may be open

Answer 1

I agree with what other people have said about closing random files being dangerous. You might end up filing some pretty interesting bug reports for all of your third-party tools.

That said, if you know you won't need those files to be open, you can always walk through all of the valid file descriptors (1 to 65535, IIRC) and close everything you don't recognize.