pub fn copy_file_range(fd_in: fd_t, off_in: ?*off_t, fd_out: fd_t, off_out: ?*off_t, len: usize, flags: u32) usize
pub fn copy_file_range(fd_in: fd_t, off_in: ?*off_t, fd_out: fd_t, off_out: ?*off_t, len: usize, flags: u32) usize { return syscall6( .copy_file_range, @as(u32, @bitCast(fd_in)), @intFromPtr(off_in), @as(u32, @bitCast(fd_out)), @intFromPtr(off_out), len, flags, ); }