nc 0.9.7

Access system calls directly
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

/// Wait for some event on a file descriptor.
pub unsafe fn ppoll(
    fds: &mut [pollfd_t],
    timeout: Option<&timespec_t>,
    sig_mask: Option<&sigset_t>,
) -> Result<i32, Errno> {
    use core::ptr::null;

    let fds_ptr = fds.as_mut_ptr() as usize;
    let nfds = fds.len();
    let timeout_ptr = timeout.map_or(null::<timespec_t>() as usize, |timeout| {
        timeout as *const timespec_t as usize
    });
    let sig_mask_ptr = sig_mask.map_or(null::<sigset_t>() as usize, |sig_mask| {
        sig_mask as *const sigset_t as usize
    });
    let sig_set_size = core::mem::size_of::<sigset_t>();
    syscall5(
        SYS_PPOLL,
        fds_ptr,
        nfds,
        timeout_ptr,
        sig_mask_ptr,
        sig_set_size,
    )
    .map(|ret| ret as i32)
}