fn copy_file_range(fd_in: fd_t, off_in: ?*i64, fd_out: fd_t, off_out: ?*i64, len: usize, flags: u32) usize

Parameters

fd_in: fd_t,
off_in: ?*i64,
fd_out: fd_t,
off_out: ?*i64,
len: usize,
flags: u32,