pub fn sendfile(outfd: fd_t, infd: fd_t, offset: ?*off_t, count: usize) usize
pub fn sendfile(outfd: fd_t, infd: fd_t, offset: ?*off_t, count: usize) usize { return syscall4( if (@hasField(SYS, "sendfile64")) .sendfile64 else .sendfile, @as(u32, @bitCast(outfd)), @as(u32, @bitCast(infd)), @intFromPtr(offset), count, ); }