4 * SPDX-License-Identifier: BSD-2-Clause
6 * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
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9 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
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33 jail = require("jail")
38 local has_demo = false
40 -- Make sure we don't have a demo jail to start with; "jid" and "name" are
42 for jparams in jail.list() do
43 if jparams["name"] == name then
50 -- Create a persistent jail named "demo" with all other parameters default.
51 jid, err = jail.setparams(name, {persist = "true"}, jail.CREATE)
57 -- Get a list of all known jail parameter names.
58 allparams = jail.allparams()
60 -- Get all the parameters of the jail we created.
61 jid, res = jail.getparams(name, allparams)
66 -- Display the jail's parameters as a pretty-printed JSON object.
67 print(ucl.to_json(res))
69 -- Confirm that we still have it for now.
71 for jparams in jail.list() do
72 if jparams["name"] == name then
79 print("demo does not exist")
82 -- Update the "persist" parameter to "false" to remove the jail.
83 jid, err = jail.setparams(name, {persist = "false"}, jail.UPDATE)
88 -- Verify that the jail is no longer on the system.
89 local is_persistent = false
91 for jparams in jail.list({"persist"}) do
92 if jparams["name"] == name then
95 is_persistent = jparams["persist"] ~= "false"
99 -- In fact, it does remain until this process ends -- c'est la vie.
101 io.write("demo still exists, jid " .. jid .. ", ")
102 if is_persistent then
103 io.write("persistent\n")
105 io.write("not persistent\n")