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--
-- SPDX-License-Identifier: BSD-2-Clause-FreeBSD
--
-- Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-- ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-- SUCH DAMAGE.
--
-- $FreeBSD$
--
local config = require("config")
local core = require("core")
local cli = {}
-- Internal function
-- Parses arguments to boot and returns two values: kernel_name, argstr
-- Defaults to nil and "" respectively.
-- This will also parse arguments to autoboot, but the with_kernel argument
-- will need to be explicitly overwritten to false
local function parseBootArgs(argv, with_kernel)
if with_kernel == nil then
with_kernel = true
end
if #argv == 0 then
if with_kernel then
return nil, ""
else
return ""
end
end
local kernel_name
local argstr = ""
for _, v in ipairs(argv) do
if with_kernel and v:sub(1,1) ~= "-" then
kernel_name = v
else
argstr = argstr .. " " .. v
end
end
if with_kernel then
return kernel_name, argstr
else
return argstr
end
end
-- Declares a global function cli_execute that attempts to dispatch the
-- arguments passed as a lua function. This gives lua a chance to intercept
-- builtin CLI commands like "boot"
-- This function intentionally does not follow our general naming guideline for
-- functions. This is global pollution, but the clearly separated 'cli' looks
-- more like a module indicator to serve as a hint of where to look for the
-- corresponding definition.
function cli_execute(...)
local argv = {...}
-- Just in case...
if #argv == 0 then
return loader.command(...)
end
local cmd_name = argv[1]
local cmd = cli[cmd_name]
if cmd ~= nil and type(cmd) == "function" then
-- Pass argv wholesale into cmd. We could omit argv[0] since the
-- traditional reasons for including it don't necessarily apply,
-- it may not be totally redundant if we want to have one global
-- handling multiple commands
return cmd(...)
else
return loader.command(...)
end
end
function cli_execute_unparsed(str)
return cli_execute(loader.parse(str))
end
-- Module exports
function cli.boot(...)
local _, argv = cli.arguments(...)
local kernel, argstr = parseBootArgs(argv)
if kernel ~= nil then
loader.perform("unload")
config.selectKernel(kernel)
end
core.boot(argstr)
end
function cli.autoboot(...)
local _, argv = cli.arguments(...)
local argstr = parseBootArgs(argv, false)
core.autoboot(argstr)
end
cli['boot-conf'] = function(...)
local _, argv = cli.arguments(...)
local kernel, argstr = parseBootArgs(argv)
if kernel ~= nil then
loader.perform("unload")
config.selectKernel(kernel)
end
core.autoboot(argstr)
end
cli['read-conf'] = function(...)
local _, argv = cli.arguments(...)
config.readConf(assert(core.popFrontTable(argv)))
end
cli['reload-conf'] = function()
config.reload()
end
-- Used for splitting cli varargs into cmd_name and the rest of argv
function cli.arguments(...)
local argv = {...}
local cmd_name
cmd_name, argv = core.popFrontTable(argv)
return cmd_name, argv
end
return cli
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