1 | #[cfg (not(any( |
2 | target_os = "redox" , |
3 | target_os = "fuchsia" , |
4 | target_os = "illumos" , |
5 | target_os = "haiku" |
6 | )))] |
7 | use nix::sys::resource::{getrlimit, setrlimit, Resource}; |
8 | |
9 | /// Tests the RLIMIT_NOFILE functionality of getrlimit(), where the resource RLIMIT_NOFILE refers |
10 | /// to the maximum file descriptor number that can be opened by the process (aka the maximum number |
11 | /// of file descriptors that the process can open, since Linux 4.5). |
12 | /// |
13 | /// We first fetch the existing file descriptor maximum values using getrlimit(), then edit the |
14 | /// soft limit to make sure it has a new and distinct value to the hard limit. We then setrlimit() |
15 | /// to put the new soft limit in effect, and then getrlimit() once more to ensure the limits have |
16 | /// been updated. |
17 | #[test] |
18 | #[cfg (not(any( |
19 | target_os = "redox" , |
20 | target_os = "fuchsia" , |
21 | target_os = "illumos" , |
22 | target_os = "haiku" |
23 | )))] |
24 | pub fn test_resource_limits_nofile() { |
25 | let (mut soft_limit, hard_limit) = |
26 | getrlimit(Resource::RLIMIT_NOFILE).unwrap(); |
27 | |
28 | soft_limit -= 1; |
29 | assert_ne!(soft_limit, hard_limit); |
30 | setrlimit(Resource::RLIMIT_NOFILE, soft_limit, hard_limit).unwrap(); |
31 | |
32 | let (new_soft_limit, _) = getrlimit(Resource::RLIMIT_NOFILE).unwrap(); |
33 | assert_eq!(new_soft_limit, soft_limit); |
34 | } |
35 | |