Function utimensat
fn utimensat<Fd: std::os::fd::AsFd, P: ?Sized + NixPath>(dirfd: Fd, path: &P, atime: &TimeSpec, mtime: &TimeSpec, flag: UtimensatFlags) -> Result<()>Change the access and modification times of a file.
The file to be changed is determined relative to the directory associated
with the file descriptor dirfd or the current working directory
if dirfd is AT_FDCWD.
If flag is UtimensatFlags::NoFollowSymlink and path names a symbolic link,
then the mode of the symbolic link is changed.
utimensat(AT_FDCWD, path, times, UtimensatFlags::FollowSymlink) is identical to
utimes(path, times). The latter is a deprecated API so prefer using the
former if the platforms you care about support it.
If you want to set the timestamp to now, use TimeSpec::UTIME_NOW. Use
TimeSpec::UTIME_OMIT if you don't want to change it.