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|
{ config, pkgs, ... }:
with pkgs.lib;
let
inherit (pkgs) stdenv;
kernelPackages = config.boot.kernelPackages;
splashutils = kernelPackages.splashutils;
requiredTTYs = config.requiredTTYs;
backgrounds =
let
specificThemes = config.services.ttyBackgrounds.specificThemes;
overridenTTYs = map (x: x.tty) specificThemes;
# Use the default theme for all the mingetty ttys and for the
# syslog tty, except those for which a specific theme is
# specified.
defaultTTYs =
filter (x: !(elem x overridenTTYs)) requiredTTYs;
in
(map (tty: { inherit tty; }) defaultTTYs) ++ specificThemes;
themesUnpacked = stdenv.mkDerivation {
name = "splash-themes";
builder = ./tty-backgrounds-combine.sh;
default = unpackTheme config.services.ttyBackgrounds.defaultTheme;
# !!! Should use XML here.
ttys = map (x: x.tty) backgrounds;
themes = map (x: if x ? theme then unpackTheme x.theme else "default") backgrounds;
};
unpackTheme = theme: import ../../lib/unpack-theme.nix {
inherit stdenv theme;
};
in
{
###### interface
options = {
services.ttyBackgrounds = {
enable = mkOption {
default = splashutils != null;
description = ''
Whether to enable graphical backgrounds for the virtual consoles.
'';
};
defaultTheme = mkOption {
default = pkgs.fetchurl {
#url = http://www.bootsplash.de/files/themes/Theme-BabyTux.tar.bz2;
url = mirror://gentoo/distfiles/Theme-BabyTux.tar.bz2;
md5 = "a6d89d1c1cff3b6a08e2f526f2eab4e0";
};
description = ''
The default theme for the virtual consoles. Themes can be found
at <link xlink:href='http://www.bootsplash.de/' />.
'';
};
specificThemes = mkOption {
default = [ ];
description = ''
This option overrides the theme for specific virtual consoles.
'';
};
};
};
###### implementation
config = mkIf config.services.ttyBackgrounds.enable (
mkAssert (splashutils != null) "
The kernelPackages does not provide splashutils, as required by ttyBackgrounds.
Either provide kernelPackages with splashutils, or disable ttyBackgrounds.
" {
services.ttyBackgrounds.specificThemes = singleton
{ tty = config.services.syslogd.tty;
theme = pkgs.themes "theme-gnu";
};
environment.etc = singleton
{ source = themesUnpacked;
target = "splash";
};
jobs.ttyBackgrounds =
{ name = "tty-backgrounds";
startOn = "started udev";
# Don't stop tty-backgrounds during shutdown; it's not needed,
# and it just causes intrusive blanking of the screen.
stopOn = "";
preStart =
''
# Critical: tell the kernel where to find splash_helper. It calls
# this program every time we switch between consoles.
helperProcFile=${splashutils.helperProcFile}
if test -e /proc/sys/fbcondecor; then helperProcFile=/proc/sys/fbcondecor; fi
echo ${splashutils}/${splashutils.helperName} > $helperProcFile
# For each console...
for tty in ${toString (map (x: x.tty) backgrounds)}; do
# Make sure that the console exists.
echo -n "" > /dev/$tty
# Set the theme as determined by tty-backgrounds-combine.sh
# above. Note that splashutils needs a TTY number
# instead of a device name, hence the ''${tty:3}.
theme=$(readlink ${themesUnpacked}/$tty)
prevTheme=$(${splashutils}/${splashutils.controlName} --tty ''${tty:3} -c getcfg |
sed 's/theme: *\(.*\)/\1/;t;d' || true)
if [ "$theme" != "$prevTheme" ]; then
${splashutils}/${splashutils.controlName} --tty ''${tty:3} -c setcfg -t $theme || true
fi
${splashutils}/${splashutils.controlName} --tty ''${tty:3} -c setpic -t $theme || true
${splashutils}/${splashutils.controlName} --tty ''${tty:3} -c on || true
done
'';
postStop =
''
# Disable the theme on each console.
for tty in ${toString (map (x: x.tty) backgrounds)}; do
${splashutils}/${splashutils.controlName} --tty ''${tty:3} -c off || true
done
'';
};
});
}
|