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tools/kvm_stat: suppress usage information on command line errors 

Errors while parsing the '-g' command line argument result in display of
usage information prior to the error message. This is a bit confusing,
as the command line is syntactically correct.
To reproduce, run 'kvm_stat -g' and specify a non-existing or inactive
guest.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Stefan Raspl 2017-12-11 12:25:26 +01:00 committed by Paolo Bonzini
parent 08e20a6300
commit 822cfe3e48
1 changed files with 5 additions and 8 deletions
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13
tools/kvm/kvm_stat/kvm_stat
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@ -1453,16 +1453,13 @@ Press any other key to refresh statistics immediately.
try:
pids = Tui.get_pid_from_gname(val)
except:
raise optparse.OptionValueError('Error while searching for guest '
'"{}", use "-p" to specify a pid '
'instead'.format(val))
sys.exit('Error while searching for guest "{}". Use "-p" to '
'specify a pid instead?'.format(val))
if len(pids) == 0:
raise optparse.OptionValueError('No guest by the name "{}" '
'found'.format(val))
sys.exit('Error: No guest by the name "{}" found'.format(val))
if len(pids) > 1:
raise optparse.OptionValueError('Multiple processes found (pids: '
'{}) - use "-p" to specify a pid '
'instead'.format(" ".join(pids)))
sys.exit('Error: Multiple processes found (pids: {}). Use "-p" '
'to specify the desired pid'.format(" ".join(pids)))
parser.values.pid = pids[0]
optparser = optparse.OptionParser(description=description_text,