--keyring argument breaks qemu-debootstrap

Bug #671126 reported by Alex Chiang on 2010-11-04
This bug affects 2 people
Affects Status Importance Assigned to Milestone
pbuilder (Debian)
Fix Released
pbuilder (Ubuntu)
qemu-kvm (Ubuntu)

Bug Description

Binary package hint: pbuilder

The file /usr/share/pbuilder/pbuilderrc defines:

# Set the debootstrap variant to 'buildd' type.
    '--keyring' '/usr/share/keyrings/ubuntu-archive-keyring.gpg'

When we create an armel chroot using pbuilder create, we call build-arm-chroot / qemu-debootstrap. The DEBOOTSTRAPOPTS arg is passed, and it turns out that qemu-debootstrap has trouble parsing the command line arguments if there is a space between the option and the value. This in turn causes the chroot creation to fail later, as we attempt to run debootstrap in the chroot:


Arguably, the command line parsing of qemu-debootstrap should be fixed, but there's nothing wrong or hacky about using the --option=value style of passing arguments to debootstrap. debootstrap itself can handle both styles.

Related branches

Alex Chiang (achiang) wrote :

Change how we pass --keyring.

Alex Chiang (achiang) wrote :

After examining the debootstrap --help output and man page, it seems like all debootstrap arguments are in the form of:


I don't see anywhere that: '--option value' is accepted (even if debootstrap implementation can correctly parse it).

Since qemu-debootstrap is merely supposed to be a wrapper around real debootstrap, and there is no way for it to know if the user is passing:

--option value vs. --singleton-option

there thus is no sane way to add support for '--option value' handling in qemu-debootstrap. The only sensible solution is to ensure that we call qemu-debootstrap with '--option=value' arguments.

I am attaching v2 of a debdiff, which now properly sets the series to natty, not maverick.

Loïc Minier (lool) wrote :

We could patch qemu-debootstrap to keep a list of debootstrap options which expect an argument and the ones which do not, but this ia a bit ugly

Right. I don't think that teaching qemu-debootstrap about all the
possible debootstrap args makes sense at all.

That is why I think patching pbuilder so it doesn't pass
confusing input to qemu-debuilder is a better solution.


Clint Byrum (clint-fewbar) wrote :

Alex, given what you've said thus far, it seems that there is no problem in qemu-debootstrap, it is just being more stringent than debootstrap in parsing the documented argument passing format. Would you agree? If so, this should be marked as Invalid in qemu-kvm.

Alex Chiang (achiang) wrote :

Clint, I agree that this isn't really a problem with
qemu-debootstrap. There is no sane way for qemu-debootstrap to
deal with all the possible debootstrap arguments unless you
completely replicate debootstrap command line parsing in the
wrapper, which doesn't make sense.

I agree that this bug should be Invalid in qemu-kvm.

Changed in qemu-kvm (Ubuntu):
status: New → Invalid
Marc Deslauriers (mdeslaur) wrote :

Thanks for the debdiff. Uploading now.

Changed in pbuilder (Ubuntu):
status: New → Fix Committed
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package pbuilder - 0.199ubuntu2

pbuilder (0.199ubuntu2) natty; urgency=low

  * pbuilderrc: change how we pass keyring in DEBOOTSTRAPOPTS (LP: #671126)
 -- Alex Chiang <email address hidden> Thu, 04 Nov 2010 13:23:04 -0600

Changed in pbuilder (Ubuntu):
status: Fix Committed → Fix Released
Changed in pbuilder (Debian):
status: Unknown → New
Changed in pbuilder (Debian):
status: New → Fix Released
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