1 files changed, 33 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/os-specific/linux/freefall/default.nix b/nixpkgs/pkgs/os-specific/linux/freefall/default.nix
new file mode 100644
index 000000000000..a091b2f17c5e
--- /dev/null
+++ b/nixpkgs/pkgs/os-specific/linux/freefall/default.nix
@@ -0,0 +1,33 @@
+{ stdenv, kernel }:
+
+stdenv.mkDerivation rec {
+  inherit (kernel) version src;
+
+  name = "freefall-${version}";
+
+  postPatch = ''
+    cd tools/laptop/freefall
+
+    # Default time-out is a little low, probably because the AC/lid status
+    # functions were never implemented. Because no-one still uses HDDs, right?
+    substituteInPlace freefall.c --replace "alarm(2)" "alarm(5)"
+  '';
+
+  makeFlags = [ "PREFIX=$(out)" ];
+
+  meta = with stdenv.lib; {
+    inherit (kernel.meta) homepage license;
+
+    description = "Free-fall protection for spinning HP/Dell laptop hard drives";
+    longDescription = ''
+      Provides a shock protection facility in modern laptops with spinning hard
+      drives, by stopping all input/output operations on the internal hard drive
+      and parking its heads on the ramp when critical situations are anticipated.
+      Requires support for the ATA/ATAPI-7 IDLE IMMEDIATE command with unload
+      feature, which should cause the drive to switch to idle mode and unload the
+      disk heads, and an accelerometer device. It has no effect on SSD devices!
+    '';
+
+    platforms = platforms.linux;
+  };
+}