Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/third_party/rust/nix/test/test_resource.rs b/third_party/rust/nix/test/test_resource.rs
new file mode 100644
index 0000000000..2ab581ba29
--- /dev/null
+++ b/third_party/rust/nix/test/test_resource.rs
@@ -0,0 +1,34 @@
+#[cfg(not(any(
+    target_os = "redox",
+    target_os = "fuchsia",
+    target_os = "illumos",
+    target_os = "haiku"
+)))]
+use nix::sys::resource::{getrlimit, setrlimit, Resource};
+
+/// Tests the RLIMIT_NOFILE functionality of getrlimit(), where the resource RLIMIT_NOFILE refers
+/// to the maximum file descriptor number that can be opened by the process (aka the maximum number
+/// of file descriptors that the process can open, since Linux 4.5).
+///
+/// We first fetch the existing file descriptor maximum values using getrlimit(), then edit the
+/// soft limit to make sure it has a new and distinct value to the hard limit. We then setrlimit()
+/// to put the new soft limit in effect, and then getrlimit() once more to ensure the limits have
+/// been updated.
+#[test]
+#[cfg(not(any(
+    target_os = "redox",
+    target_os = "fuchsia",
+    target_os = "illumos",
+    target_os = "haiku"
+)))]
+pub fn test_resource_limits_nofile() {
+    let (mut soft_limit, hard_limit) =
+        getrlimit(Resource::RLIMIT_NOFILE).unwrap();
+
+    soft_limit -= 1;
+    assert_ne!(soft_limit, hard_limit);
+    setrlimit(Resource::RLIMIT_NOFILE, soft_limit, hard_limit).unwrap();
+
+    let (new_soft_limit, _) = getrlimit(Resource::RLIMIT_NOFILE).unwrap();
+    assert_eq!(new_soft_limit, soft_limit);
+}