nc 0.8.13

Access system calls directly
Documentation 
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/// Make a new name for a file.
///
/// # Example
///
/// ```
/// let oldname = "/etc/passwd";
/// let newname = "/tmp/nc-symlinkat";
/// let ret = unsafe { nc::symlinkat(oldname, nc::AT_FDCWD, newname) };
/// assert!(ret.is_ok());
/// let ret = unsafe { nc::unlinkat(nc::AT_FDCWD, newname, 0) };
/// assert!(ret.is_ok());
/// ```
pub unsafe fn symlinkat<P: AsRef<Path>>(
    oldname: P,
    newdirfd: i32,
    newname: P,
) -> Result<(), Errno> {
    let oldname = CString::new(oldname.as_ref());
    let oldname_ptr = oldname.as_ptr() as usize;
    let newname = CString::new(newname.as_ref());
    let newname_ptr = newname.as_ptr() as usize;
    let newdirfd = newdirfd as usize;
    syscall3(SYS_SYMLINKAT, oldname_ptr, newdirfd, newname_ptr).map(drop)
}