bb7b569d36
It's not uncommon these days for the terminals attached to serial consoles to support ANSI escape sequences. However, we assume escape sequences may break some serial consoles and default to not using them when boot_serial or boot_multicons (or if console contains "comconsole" in the forth loader) for broader compatibility. We also have loader_color which can be explicitly set to "NO" to disable the use of ANSI escape sequences. The problem is that loader_color=YES gets ignored when boot_serial=YES or boot_multicons=YES (or when console contains "comconsole" in the forth loader). To fix, the existing default behavior remains unchanged when loader_color is unset, loader_color=NO explicitly disables the use of ANSI escape sequences still, and the change is that loader_color=YES can now be used to explicitly allow ANSI escapes when a serial console is enabled. Submitted by: Ryan Moeller <ryan@ixsystems.com> Reviewed by: tsoome (forth), kevans (lua) MFC after: 1 week Sponsored by: iXsystems, Inc. (Ryan) Differential Revision: https://reviews.freebsd.org/D21732
56 lines
2.0 KiB
Forth
56 lines
2.0 KiB
Forth
\ Copyright (c) 2011-2013 Devin Teske <dteske@FreeBSD.org>
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\ All rights reserved.
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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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marker task-color.4th
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\ This function returns FALSE if the `loader_color' environment variable is set
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\ to NO, no, or 0. It returns TRUE if `loader_color' is set to any other value.
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\ If `loader_color' is unset, TRUE is returned (unless booting serial).
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\
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: loader_color? ( -- t )
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s" loader_color" getenv dup -1 <> if
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\ `loader_color' is set.
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\ Check if it is explicitly disabled.
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2dup s" NO" compare-insensitive 0= if
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2drop
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FALSE exit
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then
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2dup s" 0" compare 0= if
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2drop
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FALSE exit
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then
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drop
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\ It is enabled.
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TRUE
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else
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\ `loader_color' is unset.
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\ Default to using color unless serial boot is active.
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drop
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boot_serial? 0=
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then
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;
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