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      1 /*
      2  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include "webrtc/test/testsupport/fileutils.h"
     12 
     13 #include <assert.h>
     14 
     15 #ifdef WIN32
     16 #include <direct.h>
     17 #include <tchar.h>
     18 #include <windows.h>
     19 #include <algorithm>
     20 
     21 #include "webrtc/system_wrappers/include/utf_util_win.h"
     22 #define GET_CURRENT_DIR _getcwd
     23 #else
     24 #include <unistd.h>
     25 
     26 #include "webrtc/base/scoped_ptr.h"
     27 #define GET_CURRENT_DIR getcwd
     28 #endif
     29 
     30 #include <sys/stat.h>  // To check for directory existence.
     31 #ifndef S_ISDIR  // Not defined in stat.h on Windows.
     32 #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
     33 #endif
     34 
     35 #include <stdio.h>
     36 #include <stdlib.h>
     37 #include <string.h>
     38 
     39 #include "webrtc/typedefs.h"  // For architecture defines
     40 
     41 namespace webrtc {
     42 namespace test {
     43 
     44 #if defined(WEBRTC_IOS)
     45 // Defined in iosfileutils.mm.  No header file to discourage use elsewhere.
     46 std::string IOSResourcePath(std::string name, std::string extension);
     47 #endif
     48 
     49 namespace {
     50 
     51 #ifdef WIN32
     52 const char* kPathDelimiter = "\\";
     53 #else
     54 const char* kPathDelimiter = "/";
     55 #endif
     56 
     57 #ifdef WEBRTC_ANDROID
     58 const char* kRootDirName = "/sdcard/";
     59 #else
     60 // The file we're looking for to identify the project root dir.
     61 const char* kProjectRootFileName = "DEPS";
     62 const char* kOutputDirName = "out";
     63 const char* kFallbackPath = "./";
     64 #endif
     65 #if !defined(WEBRTC_IOS)
     66 const char* kResourcesDirName = "resources";
     67 #endif
     68 
     69 char relative_dir_path[FILENAME_MAX];
     70 bool relative_dir_path_set = false;
     71 
     72 }  // namespace
     73 
     74 const char* kCannotFindProjectRootDir = "ERROR_CANNOT_FIND_PROJECT_ROOT_DIR";
     75 
     76 void SetExecutablePath(const std::string& path) {
     77   std::string working_dir = WorkingDir();
     78   std::string temp_path = path;
     79 
     80   // Handle absolute paths; convert them to relative paths to the working dir.
     81   if (path.find(working_dir) != std::string::npos) {
     82     temp_path = path.substr(working_dir.length() + 1);
     83   }
     84   // On Windows, when tests are run under memory tools like DrMemory and TSan,
     85   // slashes occur in the path as directory separators. Make sure we replace
     86   // such cases with backslashes in order for the paths to be correct.
     87 #ifdef WIN32
     88   std::replace(temp_path.begin(), temp_path.end(), '/', '\\');
     89 #endif
     90 
     91   // Trim away the executable name; only store the relative dir path.
     92   temp_path = temp_path.substr(0, temp_path.find_last_of(kPathDelimiter));
     93   strncpy(relative_dir_path, temp_path.c_str(), FILENAME_MAX);
     94   relative_dir_path_set = true;
     95 }
     96 
     97 bool FileExists(std::string& file_name) {
     98   struct stat file_info = {0};
     99   return stat(file_name.c_str(), &file_info) == 0;
    100 }
    101 
    102 #ifdef WEBRTC_ANDROID
    103 
    104 std::string ProjectRootPath() {
    105   return kRootDirName;
    106 }
    107 
    108 std::string OutputPath() {
    109   return kRootDirName;
    110 }
    111 
    112 std::string WorkingDir() {
    113   return kRootDirName;
    114 }
    115 
    116 #else // WEBRTC_ANDROID
    117 
    118 std::string ProjectRootPath() {
    119   std::string path = WorkingDir();
    120   if (path == kFallbackPath) {
    121     return kCannotFindProjectRootDir;
    122   }
    123   if (relative_dir_path_set) {
    124     path = path + kPathDelimiter + relative_dir_path;
    125   }
    126   // Check for our file that verifies the root dir.
    127   size_t path_delimiter_index = path.find_last_of(kPathDelimiter);
    128   while (path_delimiter_index != std::string::npos) {
    129     std::string root_filename = path + kPathDelimiter + kProjectRootFileName;
    130     if (FileExists(root_filename)) {
    131       return path + kPathDelimiter;
    132     }
    133     // Move up one directory in the directory tree.
    134     path = path.substr(0, path_delimiter_index);
    135     path_delimiter_index = path.find_last_of(kPathDelimiter);
    136   }
    137   // Reached the root directory.
    138   fprintf(stderr, "Cannot find project root directory!\n");
    139   return kCannotFindProjectRootDir;
    140 }
    141 
    142 std::string OutputPath() {
    143   std::string path = ProjectRootPath();
    144   if (path == kCannotFindProjectRootDir) {
    145     return kFallbackPath;
    146   }
    147   path += kOutputDirName;
    148   if (!CreateDir(path)) {
    149     return kFallbackPath;
    150   }
    151   return path + kPathDelimiter;
    152 }
    153 
    154 std::string WorkingDir() {
    155   char path_buffer[FILENAME_MAX];
    156   if (!GET_CURRENT_DIR(path_buffer, sizeof(path_buffer))) {
    157     fprintf(stderr, "Cannot get current directory!\n");
    158     return kFallbackPath;
    159   } else {
    160     return std::string(path_buffer);
    161   }
    162 }
    163 
    164 #endif  // !WEBRTC_ANDROID
    165 
    166 // Generate a temporary filename in a safe way.
    167 // Largely copied from talk/base/{unixfilesystem,win32filesystem}.cc.
    168 std::string TempFilename(const std::string &dir, const std::string &prefix) {
    169 #ifdef WIN32
    170   wchar_t filename[MAX_PATH];
    171   if (::GetTempFileName(ToUtf16(dir).c_str(),
    172                         ToUtf16(prefix).c_str(), 0, filename) != 0)
    173     return ToUtf8(filename);
    174   assert(false);
    175   return "";
    176 #else
    177   int len = dir.size() + prefix.size() + 2 + 6;
    178   rtc::scoped_ptr<char[]> tempname(new char[len]);
    179 
    180   snprintf(tempname.get(), len, "%s/%sXXXXXX", dir.c_str(),
    181            prefix.c_str());
    182   int fd = ::mkstemp(tempname.get());
    183   if (fd == -1) {
    184     assert(false);
    185     return "";
    186   } else {
    187     ::close(fd);
    188   }
    189   std::string ret(tempname.get());
    190   return ret;
    191 #endif
    192 }
    193 
    194 bool CreateDir(std::string directory_name) {
    195   struct stat path_info = {0};
    196   // Check if the path exists already:
    197   if (stat(directory_name.c_str(), &path_info) == 0) {
    198     if (!S_ISDIR(path_info.st_mode)) {
    199       fprintf(stderr, "Path %s exists but is not a directory! Remove this "
    200               "file and re-run to create the directory.\n",
    201               directory_name.c_str());
    202       return false;
    203     }
    204   } else {
    205 #ifdef WIN32
    206     return _mkdir(directory_name.c_str()) == 0;
    207 #else
    208     return mkdir(directory_name.c_str(),  S_IRWXU | S_IRWXG | S_IRWXO) == 0;
    209 #endif
    210   }
    211   return true;
    212 }
    213 
    214 std::string ResourcePath(std::string name, std::string extension) {
    215 #if defined(WEBRTC_IOS)
    216   return IOSResourcePath(name, extension);
    217 #else
    218   std::string platform = "win";
    219 #ifdef WEBRTC_LINUX
    220   platform = "linux";
    221 #endif  // WEBRTC_LINUX
    222 #ifdef WEBRTC_MAC
    223   platform = "mac";
    224 #endif  // WEBRTC_MAC
    225 
    226 #ifdef WEBRTC_ARCH_64_BITS
    227   std::string architecture = "64";
    228 #else
    229   std::string architecture = "32";
    230 #endif  // WEBRTC_ARCH_64_BITS
    231 
    232   std::string resources_path = ProjectRootPath() + kResourcesDirName +
    233       kPathDelimiter;
    234   std::string resource_file = resources_path + name + "_" + platform + "_" +
    235       architecture + "." + extension;
    236   if (FileExists(resource_file)) {
    237     return resource_file;
    238   }
    239   // Try without architecture.
    240   resource_file = resources_path + name + "_" + platform + "." + extension;
    241   if (FileExists(resource_file)) {
    242     return resource_file;
    243   }
    244   // Try without platform.
    245   resource_file = resources_path + name + "_" + architecture + "." + extension;
    246   if (FileExists(resource_file)) {
    247     return resource_file;
    248   }
    249 
    250   // Fall back on name without architecture or platform.
    251   return resources_path + name + "." + extension;
    252 #endif  // defined (WEBRTC_IOS)
    253 }
    254 
    255 size_t GetFileSize(std::string filename) {
    256   FILE* f = fopen(filename.c_str(), "rb");
    257   size_t size = 0;
    258   if (f != NULL) {
    259     if (fseek(f, 0, SEEK_END) == 0) {
    260       size = ftell(f);
    261     }
    262     fclose(f);
    263   }
    264   return size;
    265 }
    266 
    267 }  // namespace test
    268 }  // namespace webrtc
    269