1use crate::{backend, io};
2use backend::fd::AsFd;
3
4/// `copy_file_range(fd_in, off_in, fd_out, off_out, len, 0)`—Copies data
5/// from one file to another.
6///
7/// # References
8///  - [Linux]
9///
10/// [Linux]: https://man7.org/linux/man-pages/man2/copy_file_range.2.html
11#[inline]
12pub fn copy_file_range<InFd: AsFd, OutFd: AsFd>(
13    fd_in: InFd,
14    off_in: Option<&mut u64>,
15    fd_out: OutFd,
16    off_out: Option<&mut u64>,
17    len: u64,
18) -> io::Result<u64> {
19    backend::fs::syscalls::copy_file_range(fd_in.as_fd(), off_in, fd_out.as_fd(), off_out, len)
20}
21