How to limit the number of file descriptors

[glyn]

I am debugging a Rust unit test that should fail when it runs out of file descriptors. The limit is normally 1024, but when I debug the test with codelldb, the limit seems to be much higher and the test passes. How can I set the limit back to 1024 when debugging?

[vadimcn]

Maybe use setrlimit(RLIMIT_NOFILE, ...) in your test?

[glyn]

That worked, although I used the rlimit crate, e.g.:

    setrlimit(Resource::NOFILE, 100, 100).unwrap();