Add fchown(2) wrapper.

1 files changed, 18 insertions, 0 deletions

diff --git a/test/test_unistd.rs b/test/test_unistd.rs
index 0a41b65f..183d8337 100644
--- a/test/test_unistd.rs
+++ b/test/test_unistd.rs
@@ -17,6 +17,7 @@ use std::ffi::CString;
 use std::fs::DirBuilder;
 use std::fs::{self, File};
 use std::io::Write;
+use std::mem;
 use std::os::unix::prelude::*;
 use tempfile::{tempdir, tempfile};
 use libc::{_exit, off_t};
@@ -410,6 +411,23 @@ fn test_chown() {
 }
 
 #[test]
+fn test_fchown() {
+    // Testing for anything other than our own UID/GID is hard.
+    let uid = Some(getuid());
+    let gid = Some(getgid());
+
+    let path = tempfile().unwrap();
+    let fd = path.as_raw_fd();
+
+    fchown(fd, uid, gid).unwrap();
+    fchown(fd, uid, None).unwrap();
+    fchown(fd, None, gid).unwrap();
+
+    mem::drop(path);
+    fchown(fd, uid, gid).unwrap_err();
+}
+
+#[test]
 #[cfg(not(target_os = "redox"))]
 fn test_fchownat() {
     let _dr = crate::DirRestore::new();