Comment 1 for bug 655447

Carlos, thanks for the report. I can see where this will fail with a separate /usr. This is actually mountall's file though, not upstart's.

One just needs to use an OR and add a check:

start on (mounted MOUNTPOINT=/tmp) or (mounted MOUNTPOINT=/usr)

and then add this to the top

[ -x /usr/bin/find ] || exit 0

If /tmp is mounted before /usr, it will exit 0. if /usr is mounted before /tmp, then we'll just clear out the empty mount point for /tmp, which is actually a good thing. /tmp will be mounted later and we'll clear it out. If /tmp is not its own filesystem this also makes sure it gets cleaned up. Because mounted is a hook point, there's no parallelism to worry about.

Assigning to myself, merge proposal forthcoming.