Synnefo » snf-image-creator

import pbs

def find_sbin_command(command, exception):

    search_paths = ['/usr/local/sbin', '/usr/sbin', '/sbin']

    for fullpath in map(lambda x: "%s/%s" % (x, command), search_paths):

        if os.path.exists(fullpath) and os.access(fullpath, os.X_OK):

            return pbs.Command(fullpath)

        continue

    raise exception

try:

    from pbs import dmsetup

except pbs.CommandNotFound as e:

    dmsetup = find_sbin_command('dmsetup', e)

try:

    from pbs import blockdev

except pbs.CommandNotFound as e:

    blockdev = find_sbin_command('blockdev', e)