#!/bin/sh
# 0. Check whether we're on a console
TTY=$(/usr/bin/tty)
case "$TTY" in
/dev/console|/dev/vc*|/dev/tty[0-9]*)
;;
*)
echo "unicode_start skipped on $TTY" >&2
exit 0
;;
esac
# Enables Unicode processing in the current console.
#
if [ ! -e /proc/self/fd/0 ] ; then
echo "Won't set unicode mode: Can't determine console type;" >&2
echo " Please ensure that /proc is mounted." >&2
exit 1
fi
readlink /proc/self/fd/0 | grep -q -e /dev/vc -e '/dev/tty[^p]' -e /dev/console
if [ $? -eq 1 ]; then
echo "Won't set unicode mode: not a VT." >&2
exit 1
fi
# 1. The input side: the keyboard driver.
# Set the keyboard driver in Unicode mode. (Default is ASCII mode.)
# This really does nothing with the way normal keys are handled in
# the kernel. All it does is:
# - It is necessary for `dumpkeys' in order to not drop U+XXXX
# entries from the keymaps.
# - It is necessary for `loadkeys' in order to avoid warnings.
# - Unicode characters typed as Alt-x1 ... Alt-xn (where x1,...,xn
# are digits on the numeric keypad) will be emitted in UTF-8.
kbd_mode -u
# Change the keyboard mapping in such a way that the non-ASCII keys
# produce UTF-8 encoded multibyte sequences, instead of single bytes
# >= 0x80 in a legacy 8-bit encoding.
# Non-root users are allowed to change the unicode mode of their console, but
# not the global keymap. root will have to load the keymap in unicode mode
# explicitly.
uid="$(id -u 2>/dev/null)" ||:
if [ "$uid" = 0 ]; then
# There is no way of reverting the effect of "dumpkeys | loadkeys --unicode",
# the memory of the earlier keymap is lost. Therefore, try
# to save a copy of the original keymap to be able to reload it in unicode_stop.
# (see also http://mail.nl.linux.org/linux-utf8/2003-08/msg00053.html):
[ -n "$HOME" ] && [ "$HOME" != '/' ] ||
HOME='/root'
if [ -d "$HOME" ] && [ -w "$HOME" ]; then
[ -d "$HOME/.kbd" ] ||
mkdir -- "$HOME/.kbd"
[ ! -w "$HOME/.kbd" ] ||
dumpkeys > "$HOME/.kbd/.keymap_sv"
fi
# redirect stderr and stdout of loadkeys to /dev/null to avoid the confusing
# "plus before udiaeresis ignored" warnings.
dumpkeys | loadkeys --unicode > /dev/null 2>&1
fi
# 2. The output side: the console screen.
# Tell the console output driver that the bytes arriving are UTF-8
# encoded multibyte sequences.
if [ -t 1 ] && [ -t 2 ]; then
printf '\033%%G'
fi
stty iutf8
# Tell the graphics card how to display Unicode characters not
# contained in the IBM 437 character set (on PCs). The font should
# have a Unicode map attached, or explicitly specified, e.g.,
# by giving `def.uni' as a second argument.
case "$#" in
2)
setfont "$1" -u "$2"
;;
1)
setfont "$1"
;;
0)
;;
*)
echo "usage: unicode_start [font [unicode map]]"
;;
esac
Mini Shell