diff --git a/pkgs/by-name/li/libfprint-2-tod1-broadcom/package.nix b/pkgs/by-name/li/libfprint-2-tod1-broadcom/package.nix new file mode 100644 index 000000000000..0a9da8a0cb1a --- /dev/null +++ b/pkgs/by-name/li/libfprint-2-tod1-broadcom/package.nix @@ -0,0 +1,85 @@ +{ + autoPatchelfHook, + fetchzip, + lib, + libfprint-tod, + openssl, + patchelfUnstable, # have to use patchelfUnstable to support --rename-dynamic-symbols + stdenv, +}: + +# Based on ideas from (using a wrapper library to redirect fopen() calls to firmware files): +# * https://tapesoftware.net/replace-symbol/ +# * https://github.com/NixOS/nixpkgs/pull/260715 +let + pname = "libfprint-2-tod1-broadcom"; + version = "5.12.018"; + + src = fetchzip { + url = "http://dell.archive.canonical.com/updates/pool/public/libf/${pname}/${pname}_${version}.orig.tar.gz"; + hash = "sha256-0C2PpYpEJNrU+8NT95w4QV0J5nHQisMY94Czw3jQOzw="; + pname = "${pname}-unpacked"; + inherit version; + }; + + # wraps `fopen()` for finding firmware files + wrapperLibName = "wrapper-lib.so"; + wrapperLib = stdenv.mkDerivation { + pname = "${pname}-wrapper-lib"; + inherit version; + + src = ./.; + + postPatch = '' + substitute wrapper-lib.c lib.c \ + --subst-var-by to "${src}/var/lib/fprint/fw" + cc -fPIC -shared lib.c -o ${wrapperLibName} + ''; + + installPhase = '' + runHook preInstall + install -D -t $out/lib ${wrapperLibName} + runHook postInstall + ''; + }; +in +stdenv.mkDerivation { + inherit src pname version; + + buildInputs = [ + libfprint-tod + openssl + wrapperLib + ]; + + nativeBuildInputs = [ + autoPatchelfHook + patchelfUnstable + ]; + + installPhase = '' + runHook preInstall + install -D -t "$out/lib/libfprint-2/tod-1/" -m 644 -v usr/lib/x86_64-linux-gnu/libfprint-2/tod-1/libfprint-2-tod-1-broadcom.so + install -D -t "$out/lib/udev/rules.d/" -m 644 -v lib/udev/rules.d/60-libfprint-2-device-broadcom.rules + runHook postInstall + ''; + + postFixup = '' + echo fopen64 fopen_wrapper > fopen_name_map + patchelf \ + --rename-dynamic-symbols fopen_name_map \ + --add-needed ${wrapperLibName} \ + "$out/lib/libfprint-2/tod-1/libfprint-2-tod-1-broadcom.so" + ''; + + passthru.driverPath = "/lib/libfprint-2/tod-1"; + + meta = with lib; { + description = "Broadcom driver module for libfprint-2-tod Touch OEM Driver (from Dell)"; + homepage = "http://dell.archive.canonical.com/updates/pool/public/libf/libfprint-2-tod1-broadcom/"; + license = licenses.unfree; + maintainers = with maintainers; [ pitkling ]; + platforms = [ "x86_64-linux" ]; + sourceProvenance = with sourceTypes; [ binaryNativeCode ]; + }; +} diff --git a/pkgs/by-name/li/libfprint-2-tod1-broadcom/wrapper-lib.c b/pkgs/by-name/li/libfprint-2-tod1-broadcom/wrapper-lib.c new file mode 100644 index 000000000000..c6909ae55a52 --- /dev/null +++ b/pkgs/by-name/li/libfprint-2-tod1-broadcom/wrapper-lib.c @@ -0,0 +1,23 @@ +#include +#include +#include + +static const char from[] = "/var/lib/fprint/fw"; +static const char to[] = "@to@"; + +FILE* fopen_wrapper(const char* fn, const char* mode) { + size_t fn_len = strlen(fn); + size_t from_len = strlen(from); + if (fn_len > from_len && memcmp(fn, from, from_len) == 0) { + size_t to_len = strlen(to); + char* rewritten = calloc(fn_len + (to_len - from_len) + 1, 1); + memcpy(rewritten, to, to_len); + memcpy(rewritten + to_len, fn + from_len, fn_len - from_len); + + printf("fopen_wrapper.c: Replacing path '%s' with '%s'\n", fn, rewritten); + FILE* result = fopen(rewritten, mode); + free(rewritten); + return result; + } + return fopen(fn, mode); +}