#  Copyright 2021 Northern.tech AS
#  This file is part of CFEngine 3 - written and maintained by Northern.tech AS.
#  This program is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License as published by the
#  Free Software Foundation; version 3.
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
# To the extent this program is licensed as part of the Enterprise
# versions of Cfengine, the applicable Commercial Open Source License
# (COSL) may apply to this file if you as a licensee so wish it. See
# included file COSL.txt.
#+begin_src cfengine3
body common control
{
  bundlesequence => { "example" };
}

bundle agent example
{
  vars:
    # The getusers function takes two filtering arguments: exclude_names and
    # exclude_ids, both a comma separated list of usernames and user IDs
    # respectively.
    # To get users with a uid 1000 and greater we generate a list of uids from
    # 0 to 999 and convert it into a comma separated string used to filter the
    # list of users.
    "users_with_uid_gt_999"
      slist => getusers("", join(",", expandrange("[0-999]", 1)));

    # Here we get a list of users except usernames nfsnobody and vagrant as
    # well as any users with uid 8 or 9
    "users_except_nfsnobody_and_vagrant_and_uid_8_and_9"
      slist => getusers("nfsnobody,vagrant", "8,9");

    # Here we get a list of all users by not filtering any
    "allusers" slist => getusers("", "");
    "root_list" slist => { "root" };

    # this will get just the root users out of the full user list
    "justroot" slist => intersection(allusers, root_list);

  reports:
    "Found just the root user: $(justroot)";
}

#+end_src
###############################################################################
#+begin_src example_output
#@ ```
#@ R: Found just the root user: root
#@ ```
#+end_src
