SPDX-License-Identifier: BSD-2-Clause-FreeBSD

Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>

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$FreeBSD: stable/11/stand/lua/cli.lua.8 344220 2019-02-17 02:39:17Z kevans $

.Dd October 31, 2018 .Dt CLI.LUA 8 .Os .Sh NAME .Nm cli.lua .Nd FreeBSD Lua CLI module .Sh DESCRIPTION .Nm contains the main functionality required to add new CLI commands, which can be executed at the loader prompt.

p Before hooking into the functionality provided by .Nm , it must be included with a statement such as the following:

p .Dl local cli = require("cli") .Ss Adding new commands New loader commands may be created by adding functions to the object returned by requiring the .Nm module.

p For instance:

p d -literal -offset indent -compact local cli = require("cli") cli.foo = function(...) -- Expand args to command name and the rest of argv. These arguments -- are pushed directly to the stack by loader, then handed off to -- cli_execute. cli_execute then passes them on to the invoked -- function, where they appear as varargs that must be peeled apart into -- their respective components. local _, argv = cli.arguments(...) print("This is the foo command!") for k, v in ipairs(argv) do print("arg #" .. tostring(k) .. ": '" .. v .. "'") end -- Perform a loader command directly. This will not get dispatched back -- to Lua, so it is acceptable to have a function of the exact same name -- in loader. Lua will have the first chance to handle any commands -- executed at the loader prompt. loader.perform("foo") end .Ed

p This function may be invoked by a user at the loader prompt by simply typing c foo . Arguments may be passed to it as usual, space-delimited. .Ss Default Commands As of present, the .Nm module by default provides commands for c autoboot , c boot , and c boot-conf. In all three cases, the .Xr core.lua 8 module will load all ELF modules as-needed before executing the equivalent built-in loader commands. All non-kernel arguments to these commands are passed in the same order to the loader command. .Ss Exported Functions The following functions are exported from .Nm : l -tag -width cli.arguments -offset indent t Fn cli.arguments ... Takes varargs passed on the stack from .Xr loader 8 to c cli_execute , splits them out into two return values: the command name, traditionally argv[0], and the rest of argv. .El .Sh SEE ALSO .Xr loader.conf 5 , .Xr core.lua 8 , .Xr loader 8 .Sh AUTHORS The .Nm file was originally written by .An Kyle Evans Aq Mt kevans@FreeBSD.org .