{ stdenv, writeText, substituteAll, cleanSource, udev, procps, firmwareDirs , extraUdevPkgs ? [] , sndMode ? "0600" }: let # Perform substitutions in all udev rules files. udevRules = stdenv.mkDerivation { name = "udev-rules"; src = cleanSource ./udev-rules; firmwareLoader = substituteAll { src = ./udev-firmware-loader.sh; path = "${stdenv.coreutils}/bin"; isExecutable = true; inherit firmwareDirs; }; inherit sndMode; buildCommand = " buildCommand= # urgh ensureDir $out for i in $src/*; do substituteAll $i $out/$(basename $i) done shopt -s nullglob for i in ${toString extraUdevPkgs}; do for j in $i/etc/udev/rules.d/*; do ln -s $j $out/$(basename $j) done done "; }; # The udev configuration file conf = writeText "udev.conf" '' udev_rules="${udevRules}" #udev_log="debug" ''; # Dummy file indicating whether we've run udevtrigger/udevsettle. # Since that *recreates* all device nodes with default permissions, # it's not nice to do that when a user is logged in (it messes up # the permissions set by pam_devperm). # !!! Actually, this makes the udev configuration less declarative; # changes may not take effect until the user reboots. We should # find a better way to preserve the permissions of logged-in users. devicesCreated = "/var/run/devices-created"; in { name = "udev"; job = '' start on startup stop on shutdown env UDEV_CONFIG_FILE=${conf} start script echo "" > /proc/sys/kernel/hotplug # Get rid of possible old udev processes. ${procps}/bin/pkill -u root "^udevd$" || true # Start udev. ${udev}/sbin/udevd --daemon # Let udev create device nodes for all modules that have already # been loaded into the kernel (or for which support is built into # the kernel). if ! test -e ${devicesCreated}; then ${udev}/sbin/udevadm trigger ${udev}/sbin/udevadm settle # wait for udev to finish touch ${devicesCreated} fi # Kill udev, let Upstart restart and monitor it. (This is nasty, # but we have to run `udevadm trigger' first. Maybe we can use # Upstart's `binary' keyword, but it isn't implemented yet.) if ! ${procps}/bin/pkill -u root "^udevd$"; then echo "couldn't stop udevd" fi while ${procps}/bin/pgrep -u root "^udevd$"; do sleep 1 done initctl emit new-devices end script respawn ${udev}/sbin/udevd ''; }