lfs-book-zh_CN/bootscripts/lfs/init.d/console

#!/bin/sh
########################################################################
# Begin $rc_base/init.d/console
#
# Description : Sets keymap and screen font
#
# Authors     : Gerard Beekmans - gerard@linuxfromscratch.org
#		Alexander E. Patrakov
#
# Version     : 00.03
#
# Notes       :
#
########################################################################

. /etc/sysconfig/rc
. ${rc_functions}

# Native English speakers probably don't have /etc/sysconfig/console at all
if [ -f /etc/sysconfig/console ]
then
	. /etc/sysconfig/console
else
        exit 0
fi

is_true() {
	[ "$1" = "1" ] || [ "$1" = "yes" ] || [ "$1" = "true" ]
}

failed=0

case "${1}" in
	start)
		boot_mesg "Setting up Linux console..."
		# There should be no bogus failures below this line!
		
		# Figure out if a framebuffer console is used
		[ -d /sys/class/graphics/fb0 ] && USE_FB=1 || USE_FB=0
		
		# Figure out the command to set the console into the
		# desired mode
		is_true "${UNICODE}" &&
			MODE_COMMAND="${ECHO} -en '\033%G' && kbd_mode -u" ||
			MODE_COMMAND="${ECHO} -en '\033%@\033(K' && kbd_mode -a"
		
		# On framebuffer consoles, font has to be set for each vt in
		# UTF-8 mode. This doesn't hurt in non-UTF-8 mode also.
		
		! is_true "${USE_FB}" || [ -z "${FONT}" ] ||
			MODE_COMMAND="${MODE_COMMAND} && setfont ${FONT}"

		# Apply that command to all consoles mentioned in
		# /etc/inittab. Important: in the UTF-8 mode this should
		# happen before setfont, otherwise a kernel bug will
		# show up and the unicode map of the font will not be
		# used.
		# FIXME: Fedora Core also initializes two spare consoles
		# - do we want that?
		
		for TTY in `grep '^[^#].*respawn:/sbin/agetty' /etc/inittab |
			grep -o '\btty[[:digit:]]*\b'`
		do
			openvt -f -w -c ${TTY#tty} -- \
				/bin/sh -c "${MODE_COMMAND}" || failed=1
		done

		# Set the font (if not already set above) and the keymap
		is_true "${USE_FB}" || [ -z "${FONT}" ] ||
			setfont $FONT ||
			failed=1
		[ -z "${KEYMAP}" ] ||
			loadkeys ${KEYMAP} >/dev/null 2>&1 ||
			failed=1
		[ -z "${KEYMAP_CORRECTIONS}" ] ||
			loadkeys ${KEYMAP_CORRECTIONS} >/dev/null 2>&1 ||
			failed=1

		# Linux kernel generates wrong bytes when composing
		# in Unicode mode. That's why we disable dead keys in Unicode
		# mode by default. If you need them, download and apply
		# http://www.linuxfromscratch.org/~alexander/patches/linux-2.6.12.5-utf8_input-2.patch
		# After patching, add "-m charset_of_your_keymap" to the FONT
		# variable and set BROKEN_COMPOSE=false
		# in /etc/sysconfig/console

		[ -n "$BROKEN_COMPOSE" ] || BROKEN_COMPOSE="$UNICODE"
		! is_true "$BROKEN_COMPOSE" ||
			echo "" | loadkeys -c >/dev/null 2>&1 ||
			failed=1
		
		# Convert the keymap from $LEGACY_CHARSET to UTF-8
		[ -z "$LEGACY_CHARSET" ] ||
			dumpkeys -c "$LEGACY_CHARSET" |
			loadkeys -u >/dev/null 2>&1 ||
			failed=1

		# If any of the commands above failed, the trap at the
		# top would set $failed to 1
		( exit $failed )
		evaluate_retval
		;;
	*)
		echo $"Usage:" "${0} {start}"
		exit 1
		;;
esac

# End $rc_base/init.d/console