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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Defines base::PathProviderAndroid which replaces base::PathProviderPosix for
      6 // Android in base/path_service.cc.
      7 
      8 #include <limits.h>
      9 #include <unistd.h>
     10 
     11 #include "base/android/jni_android.h"
     12 #include "base/android/path_utils.h"
     13 #include "base/base_paths.h"
     14 #include "base/files/file_path.h"
     15 #include "base/files/file_util.h"
     16 #include "base/logging.h"
     17 #include "base/process/process_metrics.h"
     18 
     19 namespace base {
     20 
     21 bool PathProviderAndroid(int key, FilePath* result) {
     22   switch (key) {
     23     case base::FILE_EXE: {
     24       char bin_dir[PATH_MAX + 1];
     25       int bin_dir_size = readlink(kProcSelfExe, bin_dir, PATH_MAX);
     26       if (bin_dir_size < 0 || bin_dir_size > PATH_MAX) {
     27         NOTREACHED() << "Unable to resolve " << kProcSelfExe << ".";
     28         return false;
     29       }
     30       bin_dir[bin_dir_size] = 0;
     31       *result = FilePath(bin_dir);
     32       return true;
     33     }
     34     case base::FILE_MODULE:
     35       // dladdr didn't work in Android as only the file name was returned.
     36       NOTIMPLEMENTED();
     37       return false;
     38     case base::DIR_MODULE:
     39       return base::android::GetNativeLibraryDirectory(result);
     40     case base::DIR_SOURCE_ROOT:
     41       // Used only by tests.
     42       // In that context, hooked up via base/test/test_support_android.cc.
     43       NOTIMPLEMENTED();
     44       return false;
     45     case base::DIR_USER_DESKTOP:
     46       // Android doesn't support GetUserDesktop.
     47       NOTIMPLEMENTED();
     48       return false;
     49     case base::DIR_CACHE:
     50       return base::android::GetCacheDirectory(result);
     51     case base::DIR_ANDROID_APP_DATA:
     52       return base::android::GetDataDirectory(result);
     53     case base::DIR_ANDROID_EXTERNAL_STORAGE:
     54       return base::android::GetExternalStorageDirectory(result);
     55     default:
     56       // Note: the path system expects this function to override the default
     57       // behavior. So no need to log an error if we don't support a given
     58       // path. The system will just use the default.
     59       return false;
     60   }
     61 }
     62 
     63 }  // namespace base
     64