24 lines
1.2 KiB
Rust
24 lines
1.2 KiB
Rust
#[cfg(not(any(target_os = "redox", target_os = "fuchsia", target_os = "illumos")))]
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use nix::sys::resource::{getrlimit, setrlimit, Resource};
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/// Tests the RLIMIT_NOFILE functionality of getrlimit(), where the resource RLIMIT_NOFILE refers
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/// to the maximum file descriptor number that can be opened by the process (aka the maximum number
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/// of file descriptors that the process can open, since Linux 4.5).
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///
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/// We first fetch the existing file descriptor maximum values using getrlimit(), then edit the
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/// soft limit to make sure it has a new and distinct value to the hard limit. We then setrlimit()
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/// to put the new soft limit in effect, and then getrlimit() once more to ensure the limits have
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/// been updated.
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#[test]
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#[cfg(not(any(target_os = "redox", target_os = "fuchsia", target_os = "illumos")))]
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pub fn test_resource_limits_nofile() {
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let (soft_limit, hard_limit) = getrlimit(Resource::RLIMIT_NOFILE).unwrap();
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let soft_limit = Some(soft_limit.map_or(1024, |v| v - 1));
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assert_ne!(soft_limit, hard_limit);
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setrlimit(Resource::RLIMIT_NOFILE, soft_limit, hard_limit).unwrap();
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let (new_soft_limit, _) = getrlimit(Resource::RLIMIT_NOFILE).unwrap();
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assert_eq!(new_soft_limit, soft_limit);
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}
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