2 files changed, 131 insertions, 0 deletions
diff --git a/pkgs/tools/system/dell-command-configure/default.nix b/pkgs/tools/system/dell-command-configure/default.nix
new file mode 100644
index 00000000000..2374d36421f
--- /dev/null
+++ b/pkgs/tools/system/dell-command-configure/default.nix
@@ -0,0 +1,108 @@
+{
+  stdenv,
+  lib,
+  fetchurl,
+  dpkg,
+  autoPatchelfHook,
+  patchelfUnstable,
+  openssl,
+}:
+
+# Use techniques described in https://web.archive.org/web/20220904051329/https://tapesoftware.net/replace-symbol/
+
+# Adapted from https://github.com/KenMacD/etc-nixos/blob/d3d28085586358a62b2bb4b427eb21aad05b5b23/dcc/default.nix
+
+# Used https://github.com/NixOS/nixpkgs/pull/84926 as a template
+# then converted to use autoPatchelfHook instead, and link with
+# the dependencies from other pkgs.
+
+let
+  version = "4.8.0-494";
+
+  unpacked = stdenv.mkDerivation rec {
+    inherit version;
+    pname = "dell-command-configure-unpacked";
+
+    src = fetchurl {
+      url =
+        "https://dl.dell.com/FOLDER08911312M/1/command-configure_${version}.ubuntu20_amd64.tar.gz";
+      # The CDN blocks the Curl user-agent, so set to blank instead.
+      curlOpts = ''-A=""'';
+      hash = "sha256-l5oHgDkFBF6llNsHufTmuDzjkhGmXHYXlOJ4hvZfRoE=";
+    };
+
+    dontBuild = true;
+
+    nativeBuildInputs = [ dpkg ];
+
+    unpackPhase = ''
+      tar -xzf ${src}
+      dpkg-deb -x command-configure_${version}.ubuntu20_amd64.deb command-configure
+      dpkg-deb -x srvadmin-hapi_9.5.0_amd64.deb srvadmin-hapi
+    '';
+
+    installPhase = ''
+      mkdir $out
+      cp -r . $out
+    '';
+  };
+
+  # Contains a fopen() wrapper for finding the firmware package
+  wrapperLibName = "wrapper-lib.so";
+  wrapperLib = stdenv.mkDerivation {
+    pname = "dell-command-configure-unpacked-wrapper-lib";
+    inherit version;
+
+    src = ./.;
+
+    postPatch = ''
+      ls -al
+      substitute wrapper-lib.c lib.c \
+        --subst-var-by to "${unpacked}/srvadmin-hapi/opt/dell/srvadmin/etc/omreg.d/omreg-hapi.cfg"
+      cc -fPIC -shared lib.c -o ${wrapperLibName}
+    '';
+    installPhase = ''
+      install -D ${wrapperLibName} -t $out/lib
+    '';
+  };
+
+in stdenv.mkDerivation rec {
+  inherit version;
+  pname = "dell-command-configure";
+
+  buildInputs = [ openssl stdenv.cc.cc.lib ];
+  nativeBuildInputs = [ autoPatchelfHook ];
+  dontConfigure = true;
+
+  src = unpacked;
+
+  installPhase = ''
+    install -D -t $out/lib -m644 -v command-configure/opt/dell/dcc/libhapiintf.so
+    install -D -t $out/lib -m644 -v command-configure/opt/dell/dcc/libsmbios_c.so.2
+    install -D -t $out/bin -m755 -v command-configure/opt/dell/dcc/cctk
+    install -D -t $out/bin -m755 -v srvadmin-hapi/opt/dell/srvadmin/sbin/dchcfg
+    for lib in $(find srvadmin-hapi/opt/dell/srvadmin/lib64 -type l); do
+        install -D -t $out/lib -m644 -v $lib
+    done
+  '';
+
+  postFixup = ''
+    echo fopen fopen_wrapper > fopen_name_map
+    echo access access_wrapper > access_name_map
+    ${patchelfUnstable}/bin/patchelf \
+      --rename-dynamic-symbols fopen_name_map \
+      --rename-dynamic-symbols access_name_map \
+      --add-needed ${wrapperLibName} \
+      --set-rpath ${lib.makeLibraryPath [ wrapperLib ]} \
+      $out/lib/*
+  '';
+
+  meta = with lib; {
+    description = "Configure BIOS settings on Dell laptops.";
+    homepage =
+      "https://www.dell.com/support/article/us/en/19/sln311302/dell-command-configure";
+    license = licenses.unfree;
+    maintainers = with maintainers; [ ryangibb ];
+    platforms = [ "x86_64-linux" ];
+  };
+}
diff --git a/pkgs/tools/system/dell-command-configure/wrapper-lib.c b/pkgs/tools/system/dell-command-configure/wrapper-lib.c
new file mode 100755
index 00000000000..f93bcd58ab7
--- /dev/null
+++ b/pkgs/tools/system/dell-command-configure/wrapper-lib.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <string.h>
+
+static const char from[] =  "/usr/lib/ext/dell/omreg.cfg";
+static const char to[] = "@to@";
+
+int access_wrapper(const char *fn, int mode)
+{
+	if (!strcmp(fn, from)) {
+		printf("access_wrapper.c: Replacing path '%s' with '%s'\n", from, to);
+		fn = to;
+	}
+	return access(fn, mode);
+}
+
+FILE* fopen_wrapper(const char* fn, const char* mode)
+{
+	if (!strcmp(fn, from)) {
+		printf("fopen_wrapper.c: Replacing path '%s' with '%s'\n", from, to);
+		fn = to;
+	}
+	return fopen(fn, mode);
+}