* Unshare and unmount all datasets within the given pool. We don't want to
* rely on traversing the DSL to discover the filesystems within the pool,
* because this may be expensive (if not all of them are mounted), and can fail
- * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and
+ * arbitrarily (on I/O error, for example). Instead, we walk /etc/mtab and
* gather all the filesystems that are currently mounted.
*/
int