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nixpkgs/pkgs/os-specific/linux/frandom/default.nix

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Nix

{ stdenv, fetchurl, kernelDev }:
let baseName = "frandom-1.1";
in
stdenv.mkDerivation rec {
name = "${baseName}-${kernelDev.version}";
src = fetchurl {
url = "mirror://sourceforge/frandom/${baseName}.tar.gz";
sha256 = "15rgyk4hfawqg7z1spk2xlk1nn6rcdls8gdhc70f91shrc9pvlls";
};
preBuild = ''
kernelVersion=$(cd ${kernelDev}/lib/modules && ls)
substituteInPlace Makefile \
--replace "\$(shell uname -r)" "$kernelVersion" \
--replace "/lib/modules" "${kernelDev}/lib/modules"
'';
installPhase = ''
kernelVersion=$(cd ${kernelDev}/lib/modules && ls)
ensureDir $out/lib/modules/$kernelVersion/misc
cp frandom.ko $out/lib/modules/$kernelVersion/misc
ensureDir $out/lib/udev/rules.d
tee $out/lib/udev/rules.d/10-frandom.rules <<-EOF
#
# These are the rules for the frandom devices. In theory, we could let
# udev's catch-all rule create the /dev node based upon the kernel name,
# which gives correct result, except that the default MODE set in
# 50-udev.rules (0600) is too restrictive.
#
KERNEL=="[ef]random", MODE="444", OPTIONS="last_rule"
EOF
'';
buildInputs = [];
meta = {
description = "A very fast random number generator kernel module";
homepage = http://frandom.sourceforge.net/;
license = "GPLv2";
maintainers = [ stdenv.lib.maintainers.bluescreen303 ];
};
}