1 /*
2 * libjingle
3 * Copyright 2004--2006, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <cassert>
29
30 #ifdef WIN32
31 #include "talk/base/win32.h"
32 #endif
33
34 #include "talk/base/pathutils.h"
35 #include "talk/base/fileutils.h"
36 #include "talk/base/stringutils.h"
37 #include "talk/base/stream.h"
38
39 #include "talk/base/unixfilesystem.h"
40 #include "talk/base/win32filesystem.h"
41
42 #ifndef WIN32
43 #define MAX_PATH 260
44 #endif
45
46 namespace talk_base {
47
48 //////////////////////////
49 // Directory Iterator //
50 //////////////////////////
51
52 // A DirectoryIterator is created with a given directory. It originally points
53 // to the first file in the directory, and can be advanecd with Next(). This
54 // allows you to get information about each file.
55
56 // Constructor
DirectoryIterator()57 DirectoryIterator::DirectoryIterator()
58 #ifdef _WIN32
59 : handle_(INVALID_HANDLE_VALUE) {
60 #else
61 : dir_(NULL), dirent_(NULL) {
62 #endif
63 }
64
65 // Destructor
66 DirectoryIterator::~DirectoryIterator() {
67 #ifdef WIN32
68 if (handle_ != INVALID_HANDLE_VALUE)
69 ::FindClose(handle_);
70 #else
71 if (dir_)
72 closedir(dir_);
73 #endif
74 }
75
76 // Starts traversing a directory.
77 // dir is the directory to traverse
78 // returns true if the directory exists and is valid
79 bool DirectoryIterator::Iterate(const Pathname &dir) {
80 directory_ = dir.pathname();
81 #ifdef WIN32
82 if (handle_ != INVALID_HANDLE_VALUE)
83 ::FindClose(handle_);
84 std::string d = dir.pathname() + '*';
85 handle_ = ::FindFirstFile(ToUtf16(d).c_str(), &data_);
86 if (handle_ == INVALID_HANDLE_VALUE)
87 return false;
88 #else
89 if (dir_ != NULL)
90 closedir(dir_);
91 dir_ = ::opendir(directory_.c_str());
92 if (dir_ == NULL)
93 return false;
94 dirent_ = readdir(dir_);
95 if (dirent_ == NULL)
96 return false;
97
98 if (::stat(std::string(directory_ + Name()).c_str(), &stat_) != 0)
99 return false;
100 #endif
101 return true;
102 }
103
104 // Advances to the next file
105 // returns true if there were more files in the directory.
106 bool DirectoryIterator::Next() {
107 #ifdef WIN32
108 return ::FindNextFile(handle_, &data_) == TRUE;
109 #else
110 dirent_ = ::readdir(dir_);
111 if (dirent_ == NULL)
112 return false;
113
114 return ::stat(std::string(directory_ + Name()).c_str(), &stat_) == 0;
115 #endif
116 }
117
118 // returns true if the file currently pointed to is a directory
119 bool DirectoryIterator::IsDirectory() const {
120 #ifdef WIN32
121 return (data_.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != FALSE;
122 #else
123 return S_ISDIR(stat_.st_mode);
124 #endif
125 }
126
127 // returns the name of the file currently pointed to
128 std::string DirectoryIterator::Name() const {
129 #ifdef WIN32
130 return ToUtf8(data_.cFileName);
131 #else
132 assert(dirent_ != NULL);
133 return dirent_->d_name;
134 #endif
135 }
136
137 // returns the size of the file currently pointed to
138 size_t DirectoryIterator::FileSize() const {
139 #ifndef WIN32
140 return stat_.st_size;
141 #else
142 return data_.nFileSizeLow;
143 #endif
144 }
145
146 // returns the last modified time of this file
147 time_t DirectoryIterator::FileModifyTime() const {
148 #ifdef WIN32
149 time_t val;
150 FileTimeToUnixTime(data_.ftLastWriteTime, &val);
151 return val;
152 #else
153 return stat_.st_mtime;
154 #endif
155 }
156
157 FilesystemInterface* Filesystem::default_filesystem_ = NULL;
158
159 FilesystemInterface *Filesystem::EnsureDefaultFilesystem() {
160 if (!default_filesystem_) {
161 #ifdef WIN32
162 default_filesystem_ = new Win32Filesystem();
163 #else
164 default_filesystem_ = new UnixFilesystem();
165 #endif
166 }
167 return default_filesystem_;
168 }
169
170 bool FilesystemInterface::CopyFolder(const Pathname &old_path,
171 const Pathname &new_path) {
172 bool success = true;
173 VERIFY(IsFolder(old_path));
174 Pathname new_dir;
175 new_dir.SetFolder(new_path.pathname());
176 Pathname old_dir;
177 old_dir.SetFolder(old_path.pathname());
178 if (!CreateFolder(new_dir))
179 return false;
180 DirectoryIterator *di = IterateDirectory();
181 if (!di)
182 return false;
183 if (di->Iterate(old_dir.pathname())) {
184 do {
185 if (di->Name() == "." || di->Name() == "..")
186 continue;
187 Pathname source;
188 Pathname dest;
189 source.SetFolder(old_dir.pathname());
190 dest.SetFolder(new_path.pathname());
191 source.SetFilename(di->Name());
192 dest.SetFilename(di->Name());
193 if (!CopyFileOrFolder(source, dest))
194 success = false;
195 } while (di->Next());
196 }
197 delete di;
198 return success;
199 }
200
201 bool FilesystemInterface::DeleteFolderContents(const Pathname &folder) {
202 bool success = true;
203 VERIFY(IsFolder(folder));
204 DirectoryIterator *di = IterateDirectory();
205 if (!di)
206 return false;
207 if (di->Iterate(folder)) {
208 do {
209 if (di->Name() == "." || di->Name() == "..")
210 continue;
211 Pathname subdir;
212 subdir.SetFolder(folder.pathname());
213 if (di->IsDirectory()) {
214 subdir.AppendFolder(di->Name());
215 if (!DeleteFolderAndContents(subdir)) {
216 success = false;
217 }
218 } else {
219 subdir.SetFilename(di->Name());
220 if (!DeleteFile(subdir)) {
221 success = false;
222 }
223 }
224 } while (di->Next());
225 }
226 delete di;
227 return success;
228 }
229
230 bool FilesystemInterface::CleanAppTempFolder() {
231 Pathname path;
232 if (!GetAppTempFolder(&path))
233 return false;
234 if (IsAbsent(path))
235 return true;
236 if (!IsTemporaryPath(path)) {
237 ASSERT(false);
238 return false;
239 }
240 return DeleteFolderContents(path);
241 }
242
243 Pathname Filesystem::GetCurrentDirectory() {
244 return EnsureDefaultFilesystem()->GetCurrentDirectory();
245 }
246
247 bool CreateUniqueFile(Pathname& path, bool create_empty) {
248 LOG(LS_INFO) << "Path " << path.pathname() << std::endl;
249 // If no folder is supplied, use the temporary folder
250 if (path.folder().empty()) {
251 Pathname temporary_path;
252 if (!Filesystem::GetTemporaryFolder(temporary_path, true, NULL)) {
253 printf("Get temp failed\n");
254 return false;
255 }
256 path.SetFolder(temporary_path.pathname());
257 }
258
259 // If no filename is supplied, use a temporary name
260 if (path.filename().empty()) {
261 std::string folder(path.folder());
262 std::string filename = Filesystem::TempFilename(folder, "gt");
263 path.SetPathname(filename);
264 if (!create_empty) {
265 Filesystem::DeleteFile(path.pathname());
266 }
267 return true;
268 }
269
270 // Otherwise, create a unique name based on the given filename
271 // foo.txt -> foo-N.txt
272 const std::string basename = path.basename();
273 const size_t MAX_VERSION = 100;
274 size_t version = 0;
275 while (version < MAX_VERSION) {
276 std::string pathname = path.pathname();
277
278 if (!Filesystem::IsFile(pathname)) {
279 if (create_empty) {
280 FileStream* fs = Filesystem::OpenFile(pathname, "w");
281 delete fs;
282 }
283 return true;
284 }
285 version += 1;
286 char version_base[MAX_PATH];
287 sprintfn(version_base, ARRAY_SIZE(version_base), "%s-%u",
288 basename.c_str(), version);
289 path.SetBasename(version_base);
290 }
291 return true;
292 }
293
294 } // namespace talk_base
295