The __xmknod() shall implement the mknod() interface from ISO POSIX (2003).
__xmknod(1, path, mode, dev) has the same specification as mknod(path, mode, dev).
ver shall be 1 or the behavior of __xmknod() is undefined.
The __xmknod() function is not in the source standard; it is only in the binary standard. The mknod() function is not in the binary standard; it is only in the source standard.