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