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

#!/bin/sh
########################################################################
# Begin console
#
# Description : Sets keymap and screen font
#
# Authors     : Gerard Beekmans - gerard@linuxfromscratch.org
#               Alexander E. Patrakov
#               DJ Lucas - dj@linuxfromscratch.org
# Update      : Bruce Dubbs - bdubbs@linuxfromscratch.org
#
# Version     : LFS 7.0
#
########################################################################

### BEGIN INIT INFO
# Provides:            console
# Required-Start:
# Should-Start:        $local_fs
# Required-Stop:
# Should-Stop:
# Default-Start:       S
# Default-Stop:
# Short-Description:   Sets up a localised console.
# Description:         Sets up fonts and language settings for the user's
#                      local as defined by /etc/sysconfig/console.
# X-LFS-Provided-By:   LFS
### END INIT INFO

. /lib/lsb/init-functions

# Native English speakers probably don't have /etc/sysconfig/console at all
[ -r /etc/sysconfig/console ] && . /etc/sysconfig/console

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

failed=0

case "${1}" in
   start)
      # See if we need to do anything
      if [ -z "${KEYMAP}"         ] && [ -z "${KEYMAP_CORRECTIONS}" ] &&
         [ -z "${FONT}"           ] && [ -z "${LEGACY_CHARSET}"     ] &&     
         ! is_true "${UNICODE}"; then 
         exit 0
      fi

      # There should be no bogus failures below this line!
      log_info_msg "Setting up Linux console..."

      # 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.

      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
      [ "${use_fb}" == "1" ] || [ -z "${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

      # 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

      exit $failed
      ;;              

   *)                 
      echo "Usage:  ${0} {start}"
      exit 1          
      ;;              
esac

# End console