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* Allow modules to add packages to the $PATH seen by programs called

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from udev rules.  This is slightly tricky because udev has a
  512-character limit on environment variables, so we create a symlink
  tree to work around this.

svn path=/nixos/trunk/; revision=23822
This commit is contained in:
Eelco Dolstra 2010-09-16 15:23:12 +00:00
parent dc8eff071a
commit 82f97b5fb2
1 changed files with 23 additions and 3 deletions
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26
modules/services/hardware/udev.nix
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@ -38,7 +38,7 @@ let
cp -v ${udev}/libexec/rules.d/*.rules $out/
# Set a reasonable $PATH for programs called by udev rules.
echo 'ENV{PATH}="${pkgs.coreutils}/bin:${pkgs.gnused}/bin:${pkgs.utillinux}/bin"' > $out/00-path.rules
echo 'ENV{PATH}="${udevPath}/bin:${udevPath}/sbin"' > $out/00-path.rules
# Set the firmware search path so that the firmware.sh helper
# called by 50-firmware.rules works properly.
@ -84,6 +84,15 @@ let
#udev_log="debug"
'';
# Udev has a 512-character limit for ENV{PATH}, so create a symlink
# tree to work around this.
udevPath = pkgs.buildEnv {
name = "udev-path";
paths = cfg.path;
pathsToLink = [ "/bin" "/sbin" ];
ignoreCollisions = true;
};
in
{
@ -118,6 +127,15 @@ in
'';
};
path = mkOption {
default = [];
merge = mergeListOption;
description = ''
Packages added to the <envar>PATH</envar> environment variable when
executing programs from Udev rules.
'';
};
extraRules = mkOption {
default = "";
example = ''
@ -159,7 +177,9 @@ in
services.udev.extraRules = nixosRules;
services.udev.packages = [extraUdevRules];
services.udev.packages = [ extraUdevRules ];
services.udev.path = [ pkgs.coreutils pkgs.gnused pkgs.gnugrep pkgs.utillinux ];
jobs.udev =
{ startOn = "startup";
@ -207,7 +227,7 @@ in
initctl emit -n new-devices
'';
};
};
}