nc 0.9.7

Access system calls directly
Documentation 
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/// Check user's permission for a file.
///
/// # Examples
///
/// ```
/// let ret = unsafe { nc::faccessat(nc::AT_FDCWD, "/etc/passwd", nc::F_OK) };
/// assert!(ret.is_ok());
/// ```
pub unsafe fn faccessat<P: AsRef<Path>>(dfd: i32, filename: P, mode: i32) -> Result<(), Errno> {
    let dfd = dfd as usize;
    let filename = CString::new(filename.as_ref());
    let filename_ptr = filename.as_ptr() as usize;
    let mode = mode as usize;
    syscall3(SYS_FACCESSAT, dfd, filename_ptr, mode).map(drop)
}