uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/applications/graphics/sane/backends/brscan4/default.nix

@@ -0,0 +1,95 @@
+{ stdenv, lib, fetchurl, callPackage, patchelf, makeWrapper, libusb-compat-0_1 }:
+let
+  myPatchElf = file: with lib; ''
+    patchelf --set-interpreter \
+      ${stdenv.cc.libc}/lib/ld-linux${optionalString stdenv.is64bit "-x86-64"}.so.2 \
+      ${file}
+  '';
+
+  udevRules = callPackage ./udev_rules_type1.nix { };
+
+in
+stdenv.mkDerivation rec {
+  pname = "brscan4";
+  version = "0.4.10-1";
+  src = {
+    "i686-linux" = fetchurl {
+      url = "http://download.brother.com/welcome/dlf006646/${pname}-${version}.i386.deb";
+      sha256 = "sha256-ymIAg+rfSYP5uzsAM1hUYZacJ0PXmKEoljNtb0pgGMw=";
+    };
+    "x86_64-linux" = fetchurl {
+      url = "https://download.brother.com/welcome/dlf006645/${pname}-${version}.amd64.deb";
+      sha256 = "sha256-Gpr5456MCNpyam3g2qPo7S3aEZFMaUGR8bu7YmRY8xk=";
+    };
+  }."${stdenv.hostPlatform.system}";
+
+  unpackPhase = ''
+    ar x $src
+    tar xfvz data.tar.gz
+  '';
+
+  nativeBuildInputs = [ makeWrapper patchelf udevRules ];
+  buildInputs = [ libusb-compat-0_1 ];
+  dontBuild = true;
+
+  postPatch = ''
+    ${myPatchElf "opt/brother/scanner/brscan4/brsaneconfig4"}
+
+    RPATH=${libusb-compat-0_1.out}/lib
+    for a in usr/lib64/sane/*.so*; do
+      if ! test -L $a; then
+        patchelf --set-rpath $RPATH $a
+      fi
+    done
+  '';
+
+  installPhase = with lib; ''
+    runHook preInstall
+    PATH_TO_BRSCAN4="opt/brother/scanner/brscan4"
+    mkdir -p $out/$PATH_TO_BRSCAN4
+    cp -rp $PATH_TO_BRSCAN4/* $out/$PATH_TO_BRSCAN4
+    mkdir -p $out/lib/sane
+    cp -rp usr/lib${optionalString stdenv.is64bit "64"}/sane/* $out/lib/sane
+
+    # Symbolic links were absolute. Fix them so that they point to $out.
+    pushd "$out/lib/sane" > /dev/null
+    for a in *.so*; do
+      if test -L $a; then
+        fixedTargetFileName="$(basename $(readlink $a))"
+        unlink "$a"
+        ln -s -T "$fixedTargetFileName" "$a"
+      fi
+    done
+    popd > /dev/null
+
+    # Generate an LD_PRELOAD wrapper to redirect execvp(), open() and open64()
+    # calls to `/opt/brother/scanner/brscan4`.
+    preload=$out/libexec/brother/scanner/brscan4/libpreload.so
+    mkdir -p $(dirname $preload)
+    gcc -shared ${./preload.c} -o $preload -ldl -DOUT=\"$out\" -fPIC
+
+    makeWrapper \
+      "$out/$PATH_TO_BRSCAN4/brsaneconfig4" \
+      "$out/bin/brsaneconfig4" \
+      --set LD_PRELOAD $preload
+
+    mkdir -p $out/etc/sane.d
+    echo "brother4" > $out/etc/sane.d/dll.conf
+
+    mkdir -p $out/etc/udev/rules.d
+    cp -p ${udevRules}/etc/udev/rules.d/*.rules \
+      $out/etc/udev/rules.d
+    runHook postInstall
+  '';
+
+  dontStrip = true;
+  dontPatchELF = true;
+
+  meta = {
+    description = "Brother brscan4 sane backend driver";
+    homepage = "http://www.brother.com";
+    platforms = [ "i686-linux" "x86_64-linux" ];
+    license = lib.licenses.unfree;
+    maintainers = with lib.maintainers; [ jraygauthier ];
+  };
+}

pkgs/applications/graphics/sane/backends/brscan4/preload.c

@@ -0,0 +1,170 @@
+/* Brgen4 search for configuration under `/etc/opt/brother/scanner/brscan4`. This
+   LD_PRELOAD library intercepts execvp(), open and open64 calls to redirect them to
+   the corresponding location in $out. Also support specifying an alternate
+   file name for `brsanenetdevice4.cfg` which otherwise is invariable
+   created at `/etc/opt/brother/scanner/brscan4`*/
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <string.h>
+#include <dirent.h>
+
+char origDir [] = "/etc/opt/brother/scanner/brscan4";
+char realDir [] = OUT "/opt/brother/scanner/brscan4";
+
+char devCfgFileNameEnvVar [] = "BRSANENETDEVICE4_CFG_FILENAME";
+char devCfgFileName [] = "/etc/opt/brother/scanner/brscan4//brsanenetdevice4.cfg";
+
+const char * rewrite(const char * path, char * buf)
+{
+    if (strncmp(path, devCfgFileName, sizeof(devCfgFileName)) == 0) {
+
+      const char* newCfgFileName = getenv(devCfgFileNameEnvVar);
+      if (!newCfgFileName) return path;
+
+      if (snprintf(buf, PATH_MAX, "%s", newCfgFileName) >= PATH_MAX)
+          abort();
+      return buf;
+    }
+
+    if (strncmp(path, origDir, sizeof(origDir) - 1) != 0) return path;
+    if (snprintf(buf, PATH_MAX, "%s%s", realDir, path + sizeof(origDir) - 1) >= PATH_MAX)
+        abort();
+    return buf;
+}
+
+const char* findAndReplaceFirstOccurence(const char* inStr, const char* subStr, 
+                                         const char* replaceStr, 
+                                         char* buf, unsigned maxBuf)
+{
+    const char* foundStr = strstr(inStr, subStr);
+    if (!foundStr)
+      return inStr;
+
+    const unsigned inStrLen = strlen(inStr);
+    const unsigned subStrLen = strlen(subStr);
+    const unsigned replaceStrLen = strlen(replaceStr);
+
+    const unsigned precedingStrLen = foundStr - inStr;
+    if (precedingStrLen + 1 > maxBuf)
+      return NULL;
+
+    const unsigned followingStrPos = precedingStrLen + subStrLen;
+    const unsigned followingStrLen = inStrLen - followingStrPos;
+
+    strncpy(buf, inStr, precedingStrLen);
+    unsigned outLength = precedingStrLen;
+
+    if (outLength + replaceStrLen + 1 > maxBuf)
+      return NULL;
+
+    strncpy(buf + outLength, replaceStr, replaceStrLen);
+    outLength += replaceStrLen;
+    
+    if (outLength + followingStrLen + 1 > maxBuf)
+      return NULL;
+
+    strncpy(buf + outLength, inStr + followingStrPos, followingStrLen);
+    outLength += followingStrLen;
+    
+    buf[outLength] = '\0';
+
+    return buf;
+}
+
+const char* rewriteSystemCall(const char* command, char* buf, unsigned maxBuf)
+{
+
+    const char* foundStr = strstr(command, devCfgFileName);
+    if (!foundStr)
+      return command;
+
+    const char* replaceStr = getenv(devCfgFileNameEnvVar);
+    if (!replaceStr) return command;
+
+    const char* result = 
+      findAndReplaceFirstOccurence(command, devCfgFileName, replaceStr, buf, maxBuf);
+
+    if (!result)
+      abort();
+
+    return result;
+}
+
+int execvp(const char * path, char * const argv[])
+{
+    int (*_execvp) (const char *, char * const argv[]) = dlsym(RTLD_NEXT, "execvp");
+    char buf[PATH_MAX];
+    return _execvp(rewrite(path, buf), argv);
+}
+
+
+int open(const char *path, int flags, ...)
+{
+    char buf[PATH_MAX];
+    int (*_open) (const char *, int, mode_t) = dlsym(RTLD_NEXT, "open");
+    mode_t mode = 0;
+    if (flags & O_CREAT) {
+        va_list ap;
+        va_start(ap, flags);
+        mode = va_arg(ap, mode_t);
+        va_end(ap);
+    }
+    return _open(rewrite(path, buf), flags, mode);
+}
+
+int open64(const char *path, int flags, ...)
+{
+    char buf[PATH_MAX];
+    int (*_open64) (const char *, int, mode_t) = dlsym(RTLD_NEXT, "open64");
+    mode_t mode = 0;
+    if (flags & O_CREAT) {
+        va_list ap;
+        va_start(ap, flags);
+        mode = va_arg(ap, mode_t);
+        va_end(ap);
+    }
+    return _open64(rewrite(path, buf), flags, mode);
+}
+
+FILE* fopen(const char* path, const char* mode)
+{
+  char buf[PATH_MAX];
+	FILE* (*_fopen) (const char*, const char*) = dlsym(RTLD_NEXT, "fopen");
+
+	return _fopen(rewrite(path, buf), mode);
+}
+
+FILE *fopen64(const char *path, const char *mode)
+{
+  char buf[PATH_MAX];
+	FILE* (*_fopen64) (const char*, const char*) = dlsym(RTLD_NEXT, "fopen64");
+
+	return _fopen64(rewrite(path, buf), mode);
+}
+
+DIR* opendir(const char* path)
+{
+  char buf[PATH_MAX];
+	DIR* (*_opendir) (const char*) = dlsym(RTLD_NEXT, "opendir");
+
+	return _opendir(rewrite(path, buf));
+}
+
+#define SYSTEM_CMD_MAX 512
+
+int system(const char *command)
+{
+    char buf[SYSTEM_CMD_MAX];
+    int (*_system) (const char*) = dlsym(RTLD_NEXT, "system");
+
+    const char* newCommand = rewriteSystemCall(command, buf, SYSTEM_CMD_MAX);
+    return _system(newCommand);
+}

pkgs/applications/graphics/sane/backends/brscan4/udev_rules_type1.nix

@@ -0,0 +1,56 @@
+{ lib, stdenv, fetchurl, libsaneUDevRuleNumber ? "49" }:
+
+stdenv.mkDerivation rec {
+  pname = "brother-udev-rule-type1";
+  version = "1.0.0-1";
+
+  src = fetchurl {
+    url = "http://download.brother.com/welcome/dlf006654/brother-udev-rule-type1-${version}.all.deb";
+    sha256 = "0i0x5jw135pli4jl9mgnr5n2rrdvml57nw84yq2999r4frza53xi";
+  };
+
+  dontBuild = true;
+
+  unpackPhase = ''
+    ar x $src
+    tar xfvz data.tar.gz
+  '';
+
+  /*
+    Fix the following error:
+
+    ~~~
+    invalid rule 49-brother-libsane-type1.rules
+    unknown key 'SYSFS{idVendor}'
+    ~~~
+
+    Apparently the udev rules syntax has change and the SYSFS key has to
+    be changed to ATTR.
+
+    See:
+
+     -  <http://ubuntuforums.org/showthread.php?t=1496878>
+     -  <http://www.planet-libre.org/index.php?post_id=10937>
+  */
+  patchPhase = ''
+    sed -i -e s/SYSFS/ATTR/g opt/brother/scanner/udev-rules/type1/*.rules
+  '';
+
+  installPhase = ''
+    mkdir -p $out/etc/udev/rules.d
+    cp opt/brother/scanner/udev-rules/type1/NN-brother-mfp-type1.rules \
+      $out/etc/udev/rules.d/${libsaneUDevRuleNumber}-brother-libsane-type1.rules
+    chmod 644 $out/etc/udev/rules.d/${libsaneUDevRuleNumber}-brother-libsane-type1.rules
+  '';
+
+  dontStrip = true;
+  dontPatchELF = true;
+
+  meta = {
+    description = "Brother type1 scanners udev rules";
+    homepage = "http://www.brother.com";
+    platforms = lib.platforms.linux;
+    license = lib.licenses.unfree;
+    maintainers = with lib.maintainers; [ jraygauthier ];
+  };
+}