Date: Sun, 19 Aug 2018 15:07:39 +0000 (UTC) From: Kyle Evans <kevans@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r338054 - head/stand/lua Message-ID: <201808191507.w7JF7dIm074770@repo.freebsd.org>
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Author: kevans Date: Sun Aug 19 15:07:39 2018 New Revision: 338054 URL: https://svnweb.freebsd.org/changeset/base/338054 Log: Add config.lua(8) to the tree Reviewed by: 0mp, rpokala (earlier version) Differential Revision: https://reviews.freebsd.org/D14819 Added: head/stand/lua/config.lua.8 (contents, props changed) Added: head/stand/lua/config.lua.8 ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/stand/lua/config.lua.8 Sun Aug 19 15:07:39 2018 (r338054) @@ -0,0 +1,188 @@ +.\" +.\" 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. +.\" +.\" $FreeBSD$ +.\" +.Dd June 9, 2018 +.Dt CONFIG.LUA 8 +.Os +.Sh NAME +.Nm config.lua +.Nd FreeBSD config module +.Sh DESCRIPTION +.Nm +contains configuration and module loading functionality. +.Pp +Before hooking into or using the functionality provided by +.Nm , +it must be included with a statement such as the following: +.Pp +.Dl local config = require("config") +.Ss Exported functions +The following functions are exported from +.Nm : +.Bl -tag -width "config.setCarouselIndex(id, idx)" -offset indent +.It Fn config.getCarouselIndex id +Returns the currently chosen index in the carousel menu entry described by +.Ev id . +See the definition of +.Xr menu.lua 8 +for a more in-depth explanation of carousels. +.It Fn config.setCarouselIndex id idx +Set the chosen index for the carousel menu entry described by +.Ev id +to +.Ev idx . +A lookup will be done as needed to determine what value +.Ev idx +actually corresponds to. +.It Fn config.processFile name silent +Process and parse +.Ev name +as a configuration file. +Returns true if +.Ev name +exists and parses without error, false otherwise. +If +.Ev silent +is true, +.Fn config.processFile +will not consider a failure to read the file as a failure. +.It Fn config.parse text +Parse +.Ev text +as a configuration file. +This is used internally by +.Fn config.processFile +to parse the contents of a configuration file. +Returns true if parsing succeeds without error, false if an error occurred. +A message is also printed to the console if an error is encountered. +.It Fn config.loadKernel other_kernel +Attempts to load +.Ev other_kernel +as a kernel. +If +.Ev other_kernel +is unset +.Fn config.loadKernel +will attempt to load +.Dq kernel . +Otherwise, it will try to load +.Dq kernel +first from +.Pa /boot/{other_kernel} , +then from +.Pa {other_kernel} . +.Pp +The latter is tried in case an absolute path has been specified to the kernel +to use. +.Ev module_path +is amended to include the directory the kernel was found in if either of these +paths result in a loaded kernel. +.Pp +If no kernel was loaded from either of these paths, +.Fn config.loadKernel +will attempt to load a kernel named +.Dq {other_kernel} +from +.Ev module_path +instead of attempting to load a kernel named +.Dq kernel . +.Pp +Returns true if a kernel was loaded, false if no kernel was loaded. +.It Fn config.selectKernel kernel +Set +.Ev kernel +to the kernel that will be loaded when either +.Ic autoboot +or +.Ic boot +are invoked. +This is usually called by the menu system as the kernel selector carousel is +toggled through. +.It Fn config.load file reload +Loads +.Ev file +as a configuration file. +If +.Ev file +is not specified, +.Pa /boot/defaults/loader.conf +is used. +.Fn config.load +will then silently attempt to process any files specified in +.Ev loader_conf_files +after +.Ev file +has been processed. +.Xr nextboot 8 +configuration will also be checked as part of +.Fn config.load . +Before returning, all +.Dq config.loaded +hooks will be run if +.Ev reload +is not set to true. +.It Fn config.reload file +Reloads +.Ev file +as a configuration file. +.Fn config.reload +will restore the environment to how it existed before the last config was +loaded, then it will invoke +.Fn config.load file . +Before returning, all +.Dq config.reloaded +hooks will be run. +.It Fn config.loadelf +Loads all ELF objects, the selected kernel as well as any modules configured to +be preloaded in +.Xr loader.conf 5 . +This will be called by the Lua intercepted +.Ic autoboot +and +.Ic boot +commands. +.El +.Ss Defined Hooks +The following hooks are defined in +.Nm : +.Bl -tag -width "config.reloaded" -offset indent +.It config.loaded +.It config.reloaded +.El +.Sh SEE ALSO +.Xr loader.conf 5 , +.Xr loader 8 , +.Xr menu.lua 8 , +.Xr nextboot 8 +.Sh AUTHORS +The +.Nm +file was originally written by +.An Pedro Souza Aq Mt pedrosouza@FreeBSD.org . +Later work and this manual page was done by +.An Kyle Evans Aq Mt kevans@FreeBSD.org .
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