diff options
Diffstat (limited to 'debian/grub.d/05_debian_theme')
| -rwxr-xr-x | debian/grub.d/05_debian_theme | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/debian/grub.d/05_debian_theme b/debian/grub.d/05_debian_theme new file mode 100755 index 0000000..786888d --- /dev/null +++ b/debian/grub.d/05_debian_theme @@ -0,0 +1,197 @@ +#!/bin/sh +set -e + +# grub-mkconfig helper script. +# Copyright (C) 2010 Alexander Kurtz <kurtz.alex@googlemail.com> +# +# GRUB is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# GRUB is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GRUB. If not, see <http://www.gnu.org/licenses/>. + +# Include the GRUB helper library for grub-mkconfig. +. /usr/share/grub/grub-mkconfig_lib + +# We want to work in /boot/grub/ only. +test -d /boot/grub; cd /boot/grub + +# Set the location of a possibly necessary cache file for the background image. +# NOTE: This MUST BE A DOTFILE to avoid confusing it with user-defined images. +BACKGROUND_CACHE=".background_cache" + +set_default_theme(){ + case $GRUB_DISTRIBUTOR in + Tanglu|Ubuntu|Kubuntu) + # Set a monochromatic theme for Tanglu/Ubuntu. + echo "${1}set menu_color_normal=white/black" + echo "${1}set menu_color_highlight=black/light-gray" + + if [ -e /usr/share/plymouth/themes/default.grub ]; then + sed "s/^/${1}/" /usr/share/plymouth/themes/default.grub + fi + # For plymouth backward compatibility. Can be removed + # after xenial. + if [ -e /lib/plymouth/themes/default.grub ]; then + sed "s/^/${1}/" /lib/plymouth/themes/default.grub + fi + ;; + *) + # Set the traditional Debian blue theme. + echo "${1}set menu_color_normal=cyan/blue" + echo "${1}set menu_color_highlight=white/blue" + ;; + esac +} + +module_available(){ + local module + for module in "${1}.mod" */"${1}.mod"; do + if [ -f "${module}" ]; then + return 0 + fi + done + return 1 +} + +set_background_image(){ + # Step #1: Search all available output modes ... + local output + for output in ${GRUB_TERMINAL_OUTPUT}; do + if [ "x$output" = "xgfxterm" ]; then + break + fi + done + + # ... and check if we are able to display a background image at all. + if ! [ "x${output}" = "xgfxterm" ]; then + return 1 + fi + + # Step #2: Check if the specified background image exists. + if ! [ -f "${1}" ]; then + return 2 + fi + + # Step #3: Search the correct GRUB module for our background image. + local reader + case "${1}" in + *.jpg|*.JPG|*.jpeg|*.JPEG) reader="jpeg";; + *.png|*.PNG) reader="png";; + *.tga|*.TGA) reader="tga";; + *) return 3;; # Unknown image type. + esac + + # Step #4: Check if the necessary GRUB module is available. + if ! module_available "${reader}"; then + return 4 + fi + + # Step #5: Check if GRUB can read the background image directly. + # If so, we can remove the cache file (if any). Otherwise the background + # image needs to be cached under /boot/grub/. + if is_path_readable_by_grub "${1}"; then + rm --force "${BACKGROUND_CACHE}.jpeg" \ + "${BACKGROUND_CACHE}.png" "${BACKGROUND_CACHE}.tga" + elif cp "${1}" "${BACKGROUND_CACHE}.${reader}"; then + set -- "${BACKGROUND_CACHE}.${reader}" "${2}" "${3}" + else + return 5 + fi + + # Step #6: Prepare GRUB to read the background image. + if ! prepare_grub_to_access_device "`${grub_probe} --target=device "${1}"`"; then + return 6 + fi + + # Step #7: Everything went fine, print out a message to stderr ... + echo "Found background image: ${1}" >&2 + + # ... and write our configuration snippet to stdout. Use the colors + # desktop-base specified. If we're using a user-defined background, use + # the default colors since we've got no idea how the image looks like. + # If loading the background image fails, use the default theme. + echo "insmod ${reader}" + echo "if background_image `make_system_path_relative_to_its_root "${1}"`; then" + if [ -n "${2}" ]; then + echo " set color_normal=${2}" + fi + if [ -n "${3}" ]; then + echo " set color_highlight=${3}" + fi + if [ -z "${2}" ] && [ -z "${3}" ]; then + echo " true" + fi + echo "else" + set_default_theme " " + echo "fi" +} + +# Earlier versions of grub-pc copied the default background image to /boot/grub +# during postinst. Remove those obsolete images if they haven't been touched by +# the user. They are still available under /usr/share/images/desktop-base/ if +# desktop-base is installed. +while read checksum background; do + if [ -f "${background}" ] && [ "x`sha1sum "${background}"`" = "x${checksum} ${background}" ]; then + echo "Removing old background image: ${background}" >&2 + rm "${background}" + fi +done <<EOF +648ee65dd0c157a69b019a5372cbcfea4fc754a5 debian-blueish-wallpaper-640x480.png +0431e97a6c661084c59676c4baeeb8c2f602edb8 debian-blueish-wallpaper-640x480.png +968ecf6696c5638cfe80e8e70aba239526270864 debian-blueish-wallpaper-640x480.tga +11143e8c92a073401de0b0fd42d0c052af4ccd9b moreblue-orbit-grub.png +d00d5e505ab63f2d53fa880bfac447e2d3bb197c moreblue-orbit-grub.png +f5b12c1009ec0a3b029185f6b66cd0d7e5611019 moreblue-orbit-grub.png +EOF + +# Include the configuration of desktop-base if available. +if [ -f "/usr/share/desktop-base/grub_background.sh" ]; then + . "/usr/share/desktop-base/grub_background.sh" +fi + +# First check whether the user has specified a background image explicitly. +# If so, try to use it. Don't try the other possibilities in that case +# (#608263). +if [ -n "${GRUB_BACKGROUND+x}" ]; then + set_background_image "${GRUB_BACKGROUND}" || set_default_theme + exit 0 +fi + +# Next search for pictures the user put into /boot/grub/ and use the first one. +for background in *.jpg *.JPG *.jpeg *.JPEG *.png *.PNG *.tga *.TGA; do + if set_background_image "${background}"; then + exit 0 + fi +done + +# Next try to use the background image and colors specified by desktop-base. +if set_background_image "${WALLPAPER}" "${COLOR_NORMAL}" "${COLOR_HIGHLIGHT}"; then + exit 0 +fi + +# If we haven't found a background image yet, use the default from desktop-base. +case $GRUB_DISTRIBUTOR in + Ubuntu|Kubuntu) + ;; + Tanglu) + if set_background_image "/usr/share/images/grub/grub.png"; then + exit 0 + fi + ;; + *) + if set_background_image "/usr/share/images/desktop-base/desktop-grub.png"; then + exit 0 + fi + ;; +esac + +# Finally, if all of the above fails, use the default theme. +set_default_theme |