iptables_exe = ''

iptables_dir = '/sbin'

iptables_dir = ''

for e in ['iptables']:

    for dir in ['/sbin', '/bin', '/usr/sbin', '/usr/bin', '/usr/local/sbin', \

                '/usr/local/bin']:

        if e == "iptables":

            if os.path.exists(os.path.join(dir, e)):

                iptables_dir = dir

                iptables_exe = os.path.join(iptables_dir, "iptables")

                print "Found '%s'" % iptables_exe

            else:

                continue

        if iptables_exe != "":

            break

if iptables_exe == '':

    print >> sys.stderr, "ERROR: could not find required binary 'iptables'"

    sys.exit(1)

for e in ['ip6tables', 'iptables-restore', 'ip6tables-restore']:

    if not os.path.exists(os.path.join(iptables_dir, e)):

        print >> sys.stderr, "ERROR: could not find required binary '%s'" % (e)

        sys.exit(1)

(rc, out) = cmd([iptables_exe, '-V'])

if rc != 0:

    raise OSError(errno.ENOENT, "Could not find version for '%s'" % \

                  (iptables_exe))

version = re.sub('^v', '', re.split('\s', out)[1])

print "Found '%s' version '%s'" % (iptables_exe, version)

if version < "1.4":

    print >> sys.stderr, "WARN: version '%s' has limited IPv6 support. See README for details." % (version)