nc 0.9.8

Access system calls directly
Documentation 
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/// Transfer data between process address spaces
pub unsafe fn process_vm_readv(
    pid: pid_t,
    lvec: &[iovec_t],
    rvec: &[iovec_t],
    flags: usize,
) -> Result<ssize_t, Errno> {
    let pid = pid as usize;
    let lvec_ptr = lvec.as_ptr() as usize;
    let lvec_len = lvec.len();
    let rvec_ptr = rvec.as_ptr() as usize;
    let rvec_len = rvec.len();
    unsafe {
        syscall6(
            SYS_PROCESS_VM_READV,
            pid,
            lvec_ptr,
            lvec_len,
            rvec_ptr,
            rvec_len,
            flags,
        )
        .map(|ret| ret as ssize_t)
    }
}