On Sat, Oct 05, 2013 at 06:42:44PM -0500, Rob Landley wrote: > Oh, attached is a dumb "zapchroot" script I've been using for years to > unlink all mount points under a given directory, taking advantage of the > fact that mount points are appended to the end of the list so if you unlink > from the end to the front you should get the sub-mounts before the parent > mounts (modulo mount --move not reordering the list, but that's uncommon).
util-linux umount supports --recursive, it uses /proc/self/mountinfo to compose the hierarchy. The important is that the mountinfo file contains Id and Parent_Id relations, so you don't rely on the order only. > Recently I noticed some kernels where chroot does _not_ trim the paths so > that the paths you see in /proc/mounts are relevant to the current chroot > but instead have all sorts of crap you can't access with no way to know what > it's talking about. That was sad, I need to go figure out if that was distro > breakage or vanilla breakage... hmm.. Karel -- Karel Zak <k...@redhat.com> http://karelzak.blogspot.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/