1-- 2-- SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3-- 4-- Copyright (c) 2015 Pedro Souza <pedrosouza@freebsd.org> 5-- All rights reserved. 6-- 7-- Redistribution and use in source and binary forms, with or without 8-- modification, are permitted provided that the following conditions 9-- are met: 10-- 1. Redistributions of source code must retain the above copyright 11-- notice, this list of conditions and the following disclaimer. 12-- 2. Redistributions in binary form must reproduce the above copyright 13-- notice, this list of conditions and the following disclaimer in the 14-- documentation and/or other materials provided with the distribution. 15-- 16-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19-- ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26-- SUCH DAMAGE. 27-- 28-- $FreeBSD$ 29-- 30 31local core = require("core") 32 33local color = {} 34 35-- Module exports 36color.BLACK = 0 37color.RED = 1 38color.GREEN = 2 39color.YELLOW = 3 40color.BLUE = 4 41color.MAGENTA = 5 42color.CYAN = 6 43color.WHITE = 7 44 45color.DEFAULT = 0 46color.BRIGHT = 1 47color.DIM = 2 48 49function color.isEnabled() 50 local c = loader.getenv("loader_color") 51 if c ~= nil then 52 if c:lower() == "no" or c == "0" then 53 return false 54 end 55 end 56 return not core.isSerialBoot() 57end 58 59color.disabled = not color.isEnabled() 60 61function color.escapef(c) 62 if color.disabled then 63 return c 64 end 65 return "\027[3" .. c .. "m" 66end 67 68function color.escapeb(c) 69 if color.disabled then 70 return c 71 end 72 return "\027[4" .. c .. "m" 73end 74 75function color.escape(fg, bg, att) 76 if color.disabled then 77 return "" 78 end 79 if not att then 80 att = "" 81 else 82 att = att .. ";" 83 end 84 return "\027[" .. att .. "3" .. fg .. ";4" .. bg .. "m" 85end 86 87function color.default() 88 if color.disabled then 89 return "" 90 end 91 return "\027[0;37;40m" 92end 93 94function color.highlight(str) 95 if color.disabled then 96 return str 97 end 98 return "\027[1m" .. str .. "\027[0m" 99end 100 101return color 102