Crate rlimit[][src]

Expand description

rlimit - A simple wrapper for getrlimit and setrlimit.


Set resource limit

use rlimit::{setrlimit, Resource};

const DEFAULT_SOFT_LIMIT: u64 = 4 * 1024 * 1024;
const DEFAULT_HARD_LIMIT: u64 = 8 * 1024 * 1024;
assert!(Resource::FSIZE.set(DEFAULT_SOFT_LIMIT, DEFAULT_HARD_LIMIT).is_ok());

let soft = 16384;
let hard = soft * 2;
assert!(setrlimit(Resource::NOFILE, soft, hard).is_ok());

Get resource limit

use rlimit::{getrlimit, Resource};

assert_eq!(getrlimit(Resource::CPU).unwrap(), (rlimit::INFINITY, rlimit::INFINITY));

Increase NOFILE limit

See the example nofile.


Failed to increase NOFILE to hard limit on macOS

On macOS, getrlimit by default reports that the hard limit is unlimited, but there is usually a stricter hard limit discoverable via sysctl (kern.maxfilesperproc). Failing to discover this secret stricter hard limit will cause the call to setrlimit to fail.


[Linux] A process’s resource limit field.

[Linux] A process’s resource limits. It is parsed from the proc filesystem.

A kind of resource.


A value indicating no limit.

A value indicating an unrepresentable saved soft limit.

A value indicating an unrepresentable saved hard limit.


Get resource limits.

[Linux] Set and get the resource limits of an arbitrary process.

Set resource limits.

Type Definitions

Integer type used for resource values.