qemu-img should give reasons for failing

[Colin Watson]

Binary package hint: qemu

  $ kvm-img create -f qcow2 disks/t.img 4000M
  Formatting 'disks/t.img', fmt=qcow2, size=4096000 kB
  qemu-img: Error while formatting

strace shows that the real error was "Permission denied". It should say so, using strerror.

ProblemType: Bug
Architecture: i386
Date: Mon Aug 24 13:31:45 2009
DistroRelease: Ubuntu 9.10
Package: qemu 0.10.6-1ubuntu1
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 LC_COLLATE=C
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-5.24-generic
SourcePackage: qemu
Uname: Linux 2.6.31-5-generic i686

[Dustin Kirkland  (kirkland)]

Confirmed:

kirkland@x200:~$ kvm-img create -f qcow2 /root/t.img 4000M
Formatting '/root/t.img', fmt=qcow2 size=4194304000 encryption=off cluster_size=0
qemu-img: Error while formatting

Should be EPERM.

Anthony-

This should be pretty reasonable to solve upstream, no?

:-Dustin

[Dustin Kirkland  (kirkland)]

qemu-img create -f qcow2 /root/t.img 4000M
Formatting '/root/t.img', fmt=qcow2 size=4194304000 encryption=off cluster_size=0
qemu-img: Error while formatting (Operation not permitted)

Look better Colin?

Anthony, will you take this attached patch upstream?

:-Dustin

[Launchpad Janitor (janitor)]

This bug was fixed in the package qemu-kvm - 0.11.0~rc2-0ubuntu4

---------------
qemu-kvm (0.11.0~rc2-0ubuntu4) karmic; urgency=low

  * debian/patches/05_improve-qemu-img-errors.patch: use strerror()
    for qemu-img error reporting, LP: #418112
  * fix links

 -- Dustin Kirkland <email address hidden> Thu, 10 Sep 2009 22:58:09 -0500

[Colin Watson (cjwatson)]

Much better, thanks.