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Description of problem:
virsh command domblklist will return 1 when do
# virsh domblklist kvm-rhel6u2-x86_64
Target     Source
------------------------------------------------
hda        /var/lib/libvirt/images/kvm-rhel6u2-x86_64.img

# echo $?
1
but seems that everything is ok and no error report 

Version-Release number of selected component (if applicable):
libvirt-0.9.4-23.el6.x86_64
kernel-2.6.32-220.el6.x86_64
qemu-kvm-0.12.1.2-2.209.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. # virsh domblklist guest
2. # echo $?

  
Actual results:
return 1

Expected results:
return 0

Additional info:

Patch for upstream:
http://www.redhat.com/archives/libvir-list/2011-November/msg01762.html

Alex, I've put this in POST, can you comment with the commit message?

Dave, thanks.

commit d082e1b966231743a142cc355d5da4edbec4dc9a
Author: Alex Jia <ajia>
Date:   Wed Nov 30 16:25:07 2011 +0800

    virsh: correct return value error
    
    Fix cmdDomblklist to return 'true' on success instead of '0'
    
    https://bugzilla.redhat.com/show_bug.cgi?id=758590

Reproduce this bug with libvirt-0.9.4-23.el6.x86_64.

Verified this bug with libvirt-0.9.9-1.el6 with below steps:

Steps:
# virsh domblklist rhel62
Target     Source
------------------------------------------------
hda        /var/lib/libvirt/images/rhel62.img

# echo $?
0

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-0748.html