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Old 04-03-2010, 07:52 PM
Alkis Georgopoulos
Default Cannot umount /proc after using update-binfmts in a chroot

Fix released in LTSP 5.2.1.

** Changed in: ltsp (Ubuntu)
Status: Fix Committed => Fix Released

Cannot umount /proc after using update-binfmts in a chroot
You received this bug notification because you are a member of Edubuntu
Bugsquad, which is subscribed to ltsp in ubuntu.

Status in “binfmt-support” package in Ubuntu: Triaged
Status in “ltsp” package in Ubuntu: Fix Released

Bug description:
Binary package hint: binfmt-support

As part of LTSP fat client installations, the following instructions are performed (cut down version):

$ chroot "$ROOT" mount -t proc proc /proc
$ chroot "$ROOT" update-binfmts --import wine
$ umount "$ROOT/proc"

At this point we get:
$ umount: /opt/ltsp/i386/proc: device is busy.
$ (In some cases useful info about processes that use
$ the device is found by lsof(8) or fuser(1))
...and we're forced to resort to `umount -l` to work around this problem.

Is the any way to call update-binfmts in a chroot (e.g. to install wine) without having to resort to `umount -l`?

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