Add fchown(2) wrapper.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/unistd.rs b/src/unistd.rs
index 8ff71e05..c09e4019 100644
--- a/src/unistd.rs
+++ b/src/unistd.rs
@@ -651,6 +651,20 @@ pub fn chown<P: ?Sized + NixPath>(path: &P, owner: Option<Uid>, group: Option<Gi
     Errno::result(res).map(drop)
 }
 
+/// Change the ownership of the file referred to by the open file descriptor `fd` to be owned by
+/// the specified `owner` (user) and `group` (see
+/// [fchown(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/fchown.html)).
+///
+/// The owner/group for the provided file will not be modified if `None` is
+/// provided for that argument.  Ownership change will be attempted for the path
+/// only if `Some` owner/group is provided.
+#[inline]
+pub fn fchown(fd: RawFd, owner: Option<Uid>, group: Option<Gid>) -> Result<()> {
+    let (uid, gid) = chown_raw_ids(owner, group);
+    let res = unsafe { libc::fchown(fd, uid, gid) };
+    Errno::result(res).map(drop)
+}
+
 /// Flags for `fchownat` function.
 #[derive(Clone, Copy, Debug)]
 pub enum FchownatFlags {