.. versionadded:: 2014.7.0

    Return a list of all files specified as ``ExecStart`` for all services.

    root
        Enable/disable/mask unit files in the specified root directory

    CLI Example:

        salt '*' service.execs

def execs(root=None):
    '''
    .. versionadded:: 2014.7.0

    Return a list of all files specified as ``ExecStart`` for all services.

    root
        Enable/disable/mask unit files in the specified root directory

    CLI Example:

        salt '*' service.execs
    '''
    ret = {}
    for service in get_all(root=root):
        data = show(service, root=root)
        if 'ExecStart' not in data:
            continue
        ret[service] = data['ExecStart']['path']
    return ret