127 lines
3.7 KiB
Lua
127 lines
3.7 KiB
Lua
--
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-- SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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--
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-- Copyright (c) 2018 Kyle Evans <kevans@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 AUTHOR 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 AUTHOR 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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local config = require("config")
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local core = require("core")
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local cli = {}
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-- Internal function
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-- Parses arguments to boot and returns two values: kernel_name, argstr
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-- Defaults to nil and "" respectively.
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-- This will also parse arguments to autoboot, but the with_kernel argument
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-- will need to be explicitly overwritten to false
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local function parseBootArgs(argv, with_kernel)
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if with_kernel == nil then
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with_kernel = true
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end
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if #argv == 0 then
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if with_kernel then
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return nil, ""
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else
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return ""
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end
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end
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local kernel_name
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local argstr = ""
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for _, v in ipairs(argv) do
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if with_kernel and v:sub(1,1) ~= "-" then
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kernel_name = v
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else
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argstr = argstr .. " " .. v
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end
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end
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if with_kernel then
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return kernel_name, argstr
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else
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return argstr
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end
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end
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-- Declares a global function cli_execute that attempts to dispatch the
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-- arguments passed as a lua function. This gives lua a chance to intercept
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-- builtin CLI commands like "boot"
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-- This function intentionally does not follow our general naming guideline for
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-- functions. This is global pollution, but the clearly separated 'cli' looks
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-- more like a module indicator to serve as a hint of where to look for the
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-- corresponding definition.
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function cli_execute(...)
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local argv = {...}
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-- Just in case...
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if #argv == 0 then
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return loader.command(...)
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end
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local cmd_name = argv[1]
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local cmd = cli[cmd_name]
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if cmd ~= nil and type(cmd) == "function" then
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-- Pass argv wholesale into cmd. We could omit argv[0] since the
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-- traditional reasons for including it don't necessarily apply,
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-- it may not be totally redundant if we want to have one global
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-- handling multiple commands
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return cmd(...)
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else
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return loader.command(...)
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end
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end
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function cli_execute_unparsed(str)
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return cli_execute(loader.parse(str))
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end
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-- Module exports
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function cli.boot(...)
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local _, argv = cli.arguments(...)
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local kernel, argstr = parseBootArgs(argv)
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if kernel ~= nil then
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loader.perform("unload")
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config.selectKernel(kernel)
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end
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core.boot(argstr)
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end
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function cli.autoboot(...)
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local _, argv = cli.arguments(...)
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local argstr = parseBootArgs(argv, false)
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core.autoboot(argstr)
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end
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-- Used for splitting cli varargs into cmd_name and the rest of argv
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function cli.arguments(...)
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local argv = {...}
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local cmd_name
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cmd_name, argv = core.popFrontTable(argv)
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return cmd_name, argv
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end
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return cli
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