nc 0.9.7

Access system calls directly
Documentation 
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/// Revoke file access
pub unsafe fn revoke<P: AsRef<Path>>(path: P) -> Result<(), Errno> {
    let path = CString::new(path.as_ref());
    let path_ptr = path.as_ptr() as usize;
    syscall1(SYS_REVOKE, path_ptr).map(drop)
}