6a7647eccd
This is implemented as an iterator, reusing parts of the earlier logic to populate jailparams from a passed in table. The user may request any number of parameters to pull in while we're searching, but we'll force jid and name to appear at a minimum. Reviewed by: freqlabs Differential Revision: https://reviews.freebsd.org/D26756
108 lines
3.1 KiB
Lua
108 lines
3.1 KiB
Lua
#!/usr/libexec/flua
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--[[
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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]]--
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jail = require("jail")
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ucl = require("ucl")
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name = "demo"
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local has_demo = false
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-- Make sure we don't have a demo jail to start with; "jid" and "name" are
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-- always present.
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for jparams in jail.list() do
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if jparams["name"] == name then
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has_demo = true
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break
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end
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end
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if not has_demo then
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-- Create a persistent jail named "demo" with all other parameters default.
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jid, err = jail.setparams(name, {persist = "true"}, jail.CREATE)
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if not jid then
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error(err)
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end
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end
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-- Get a list of all known jail parameter names.
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allparams = jail.allparams()
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-- Get all the parameters of the jail we created.
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jid, res = jail.getparams(name, allparams)
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if not jid then
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error(res)
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end
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-- Display the jail's parameters as a pretty-printed JSON object.
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print(ucl.to_json(res))
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-- Confirm that we still have it for now.
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has_demo = false
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for jparams in jail.list() do
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if jparams["name"] == name then
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has_demo = true
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break
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end
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end
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if not has_demo then
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print("demo does not exist")
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end
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-- Update the "persist" parameter to "false" to remove the jail.
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jid, err = jail.setparams(name, {persist = "false"}, jail.UPDATE)
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if not jid then
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error(err)
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end
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-- Verify that the jail is no longer on the system.
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local is_persistent = false
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has_demo = false
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for jparams in jail.list({"persist"}) do
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if jparams["name"] == name then
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has_demo = true
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jid = jparams["jid"]
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is_persistent = jparams["persist"] ~= "false"
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end
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end
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-- In fact, it does remain until this process ends -- c'est la vie.
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if has_demo then
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io.write("demo still exists, jid " .. jid .. ", ")
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if is_persistent then
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io.write("persistent\n")
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else
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io.write("not persistent\n")
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end
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end
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