libjail.lua (73577bf01de5c4677dc54d97f93310286c254780) libjail.lua (6a7647eccd3ef35189c63a61b0ec8865fd559839)
1#!/usr/libexec/flua
2--[[
3/*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
7 *
8 * Redistribution and use in source and binary forms, with or without

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30 */
31]]--
32
33jail = require("jail")
34ucl = require("ucl")
35
36name = "demo"
37
1#!/usr/libexec/flua
2--[[
3/*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 21 unchanged lines hidden (view full) ---

30 */
31]]--
32
33jail = require("jail")
34ucl = require("ucl")
35
36name = "demo"
37
38-- Create a persistent jail named "demo" with all other parameters default.
39jid, err = jail.setparams(name, {persist = "true"}, jail.CREATE)
40if not jid then
41 error(err)
38local has_demo = false
39
40-- Make sure we don't have a demo jail to start with; "jid" and "name" are
41-- always present.
42for jparams in jail.list() do
43 if jparams["name"] == name then
44 has_demo = true
45 break
46 end
42end
43
47end
48
49if not has_demo then
50 -- Create a persistent jail named "demo" with all other parameters default.
51 jid, err = jail.setparams(name, {persist = "true"}, jail.CREATE)
52 if not jid then
53 error(err)
54 end
55end
56
44-- Get a list of all known jail parameter names.
45allparams = jail.allparams()
46
47-- Get all the parameters of the jail we created.
48jid, res = jail.getparams(name, allparams)
49if not jid then
50 error(res)
51end
52
53-- Display the jail's parameters as a pretty-printed JSON object.
54print(ucl.to_json(res))
55
57-- Get a list of all known jail parameter names.
58allparams = jail.allparams()
59
60-- Get all the parameters of the jail we created.
61jid, res = jail.getparams(name, allparams)
62if not jid then
63 error(res)
64end
65
66-- Display the jail's parameters as a pretty-printed JSON object.
67print(ucl.to_json(res))
68
69-- Confirm that we still have it for now.
70has_demo = false
71for jparams in jail.list() do
72 if jparams["name"] == name then
73 has_demo = true
74 break
75 end
76end
77
78if not has_demo then
79 print("demo does not exist")
80end
81
56-- Update the "persist" parameter to "false" to remove the jail.
57jid, err = jail.setparams(name, {persist = "false"}, jail.UPDATE)
58if not jid then
59 error(err)
60end
82-- Update the "persist" parameter to "false" to remove the jail.
83jid, err = jail.setparams(name, {persist = "false"}, jail.UPDATE)
84if not jid then
85 error(err)
86end
87
88-- Verify that the jail is no longer on the system.
89local is_persistent = false
90has_demo = false
91for jparams in jail.list({"persist"}) do
92 if jparams["name"] == name then
93 has_demo = true
94 jid = jparams["jid"]
95 is_persistent = jparams["persist"] ~= "false"
96 end
97end
98
99-- In fact, it does remain until this process ends -- c'est la vie.
100if has_demo then
101 io.write("demo still exists, jid " .. jid .. ", ")
102 if is_persistent then
103 io.write("persistent\n")
104 else
105 io.write("not persistent\n")
106 end
107end