Munin contributed plugins

def find_vms_tap():

    ''' Check if kvm is installed

    @return a list of pids from running kvm

    '''

    result = []

    tap = ""

    mac = ""

    kvm = Popen("ip a | grep -A 1 tap | awk '{print $2}' | grep -v '^$'", shell=True, stdout=PIPE)

    res = kvm.communicate()[0].split('\n')

    for line in res:

        try:

            if len(line) > 0:

                if re.match(r"^tap.*", line):

                    tap = re.sub(r"(tap[^:]+):", r"\1", line)

                else:

                    result.append(tap)

        except Exception as inst:

            continue

    return result