nixpkgs/pkgs/os-specific/linux/rfkill/udev.nix

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{ stdenv, substituteAll }:
# Provides a facility to hook into rfkill changes.
#
# Exemplary usage:
#
# Add this package to udev.packages, e.g.:
# udev.packages = [ pkgs.rfkill_udev ];
#
# Add a hook script in the managed etc directory, e.g.:
# etc = [
# { source = pkgs.writeScript "rtfkill.hook" ''
# #!${pkgs.runtimeShell}
#
# if [ "$RFKILL_STATE" -eq "1" ]; then
# exec ${config.system.build.upstart}/sbin/initctl emit -n antenna-on
# else
# exec ${config.system.build.upstart}/sbin/initctl emit -n antenna-off
# fi
# '';
# target = "rfkill.hook";
# }
# Note: this package does not need the binaries
# in the rfkill package.
let
rfkillHook =
substituteAll {
inherit (stdenv) shell;
isExecutable = true;
src = ./rfkill-hook.sh;
};
in stdenv.mkDerivation {
name = "rfkill-udev";
unpackPhase = "true";
dontBuild = true;
installPhase = ''
mkdir -p "$out/etc/udev/rules.d/";
cat > "$out/etc/udev/rules.d/90-rfkill.rules" << EOF
SUBSYSTEM=="rfkill", ATTR{type}=="wlan", RUN+="$out/bin/rfkill-hook.sh"
EOF
mkdir -p "$out/bin/";
cp ${rfkillHook} "$out/bin/rfkill-hook.sh"
'';
meta = {
homepage = http://wireless.kernel.org/en/users/Documentation/rfkill;
description = "Rules+hook for udev to catch rfkill state changes";
platforms = stdenv.lib.platforms.linux;
};
}