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author
S.Çağlar Onur
<caglar@cs.princeton.edu>
Tue, 27 Jul 2010 17:15:01 +0000
(13:15 -0400)
committer
S.Çağlar Onur
<caglar@cs.princeton.edu>
Tue, 27 Jul 2010 17:15:01 +0000
(13:15 -0400)
cmd = "pvdisplay %s | grep -q 'planetlab'" % lvm_partition
already_added= utils.sysexec_noerr(cmd, log)
if already_added:
log.write( "It appears %s is part of the volume group, continuing.\n" %
device )
....
fails because pvdisplay returns a non-negative number on error
[root@mlab1 ~]# pvdisplay /dev/sdb1
Failed to read physical volume "/dev/sdb1"
[root@mlab1 ~]# echo $?
5
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