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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/files/file_path_watcher.h" | 5 #include "base/files/file_path_watcher.h" |
6 | 6 |
7 #include <fcntl.h> | 7 #include <fcntl.h> |
8 #include <sys/event.h> | 8 #include <sys/event.h> |
9 #include <sys/param.h> | 9 #include <sys/param.h> |
10 | 10 |
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188 int FilePathWatcherImpl::FileDescriptorForPath(const FilePath& path) { | 188 int FilePathWatcherImpl::FileDescriptorForPath(const FilePath& path) { |
189 return HANDLE_EINTR(open(path.value().c_str(), O_EVTONLY)); | 189 return HANDLE_EINTR(open(path.value().c_str(), O_EVTONLY)); |
190 } | 190 } |
191 | 191 |
192 void FilePathWatcherImpl::CloseFileDescriptor(int *fd) { | 192 void FilePathWatcherImpl::CloseFileDescriptor(int *fd) { |
193 if (*fd == -1) { | 193 if (*fd == -1) { |
194 return; | 194 return; |
195 } | 195 } |
196 | 196 |
197 if (HANDLE_EINTR(close(*fd)) != 0) { | 197 if (HANDLE_EINTR(close(*fd)) != 0) { |
198 PLOG(ERROR) << "close"; | 198 DPLOG(ERROR) << "close"; |
199 } | 199 } |
200 *fd = -1; | 200 *fd = -1; |
201 } | 201 } |
202 | 202 |
203 bool FilePathWatcherImpl::AreKeventValuesValid(struct kevent* kevents, | 203 bool FilePathWatcherImpl::AreKeventValuesValid(struct kevent* kevents, |
204 int count) { | 204 int count) { |
205 if (count < 0) { | 205 if (count < 0) { |
206 PLOG(ERROR) << "kevent"; | 206 DPLOG(ERROR) << "kevent"; |
207 return false; | 207 return false; |
208 } | 208 } |
209 bool valid = true; | 209 bool valid = true; |
210 for (int i = 0; i < count; ++i) { | 210 for (int i = 0; i < count; ++i) { |
211 if (kevents[i].flags & EV_ERROR && kevents[i].data) { | 211 if (kevents[i].flags & EV_ERROR && kevents[i].data) { |
212 // Find the kevent in |events_| that matches the kevent with the error. | 212 // Find the kevent in |events_| that matches the kevent with the error. |
213 EventVector::iterator event = events_.begin(); | 213 EventVector::iterator event = events_.begin(); |
214 for (; event != events_.end(); ++event) { | 214 for (; event != events_.end(); ++event) { |
215 if (event->ident == kevents[i].ident) { | 215 if (event->ident == kevents[i].ident) { |
216 break; | 216 break; |
217 } | 217 } |
218 } | 218 } |
219 std::string path_name; | 219 std::string path_name; |
220 if (event != events_.end()) { | 220 if (event != events_.end()) { |
221 EventData* event_data = EventDataForKevent(*event); | 221 EventData* event_data = EventDataForKevent(*event); |
222 if (event_data != NULL) { | 222 if (event_data != NULL) { |
223 path_name = event_data->path_.value(); | 223 path_name = event_data->path_.value(); |
224 } | 224 } |
225 } | 225 } |
226 if (path_name.empty()) { | 226 if (path_name.empty()) { |
227 path_name = base::StringPrintf( | 227 path_name = base::StringPrintf( |
228 "fd %d", *reinterpret_cast<int*>(&kevents[i].ident)); | 228 "fd %d", *reinterpret_cast<int*>(&kevents[i].ident)); |
229 } | 229 } |
230 LOG(ERROR) << "Error: " << kevents[i].data << " for " << path_name; | 230 DLOG(ERROR) << "Error: " << kevents[i].data << " for " << path_name; |
231 valid = false; | 231 valid = false; |
232 } | 232 } |
233 } | 233 } |
234 return valid; | 234 return valid; |
235 } | 235 } |
236 | 236 |
237 void FilePathWatcherImpl::HandleAttributesChange( | 237 void FilePathWatcherImpl::HandleAttributesChange( |
238 const EventVector::iterator& event, | 238 const EventVector::iterator& event, |
239 bool* target_file_affected, | 239 bool* target_file_affected, |
240 bool* update_watches) { | 240 bool* update_watches) { |
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331 } else { | 331 } else { |
332 break; | 332 break; |
333 } | 333 } |
334 } | 334 } |
335 } | 335 } |
336 return true; | 336 return true; |
337 } | 337 } |
338 | 338 |
339 void FilePathWatcherImpl::OnFileCanReadWithoutBlocking(int fd) { | 339 void FilePathWatcherImpl::OnFileCanReadWithoutBlocking(int fd) { |
340 DCHECK(MessageLoopForIO::current()); | 340 DCHECK(MessageLoopForIO::current()); |
341 CHECK_EQ(fd, kqueue_); | 341 DCHECK_EQ(fd, kqueue_); |
342 CHECK(events_.size()); | 342 DCHECK(events_.size()); |
343 | 343 |
344 // Request the file system update notifications that have occurred and return | 344 // Request the file system update notifications that have occurred and return |
345 // them in |updates|. |count| will contain the number of updates that have | 345 // them in |updates|. |count| will contain the number of updates that have |
346 // occurred. | 346 // occurred. |
347 EventVector updates(events_.size()); | 347 EventVector updates(events_.size()); |
348 struct timespec timeout = {0, 0}; | 348 struct timespec timeout = {0, 0}; |
349 int count = HANDLE_EINTR(kevent(kqueue_, NULL, 0, &updates[0], updates.size(), | 349 int count = HANDLE_EINTR(kevent(kqueue_, NULL, 0, &updates[0], updates.size(), |
350 &timeout)); | 350 &timeout)); |
351 | 351 |
352 // Error values are stored within updates, so check to make sure that no | 352 // Error values are stored within updates, so check to make sure that no |
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425 DCHECK_EQ(kqueue_, -1); | 425 DCHECK_EQ(kqueue_, -1); |
426 | 426 |
427 delegate_ = delegate; | 427 delegate_ = delegate; |
428 target_ = path; | 428 target_ = path; |
429 | 429 |
430 MessageLoop::current()->AddDestructionObserver(this); | 430 MessageLoop::current()->AddDestructionObserver(this); |
431 io_message_loop_ = base::MessageLoopProxy::current(); | 431 io_message_loop_ = base::MessageLoopProxy::current(); |
432 | 432 |
433 kqueue_ = kqueue(); | 433 kqueue_ = kqueue(); |
434 if (kqueue_ == -1) { | 434 if (kqueue_ == -1) { |
435 PLOG(ERROR) << "kqueue"; | 435 DPLOG(ERROR) << "kqueue"; |
436 return false; | 436 return false; |
437 } | 437 } |
438 | 438 |
439 int last_entry = EventsForPath(target_, &events_); | 439 int last_entry = EventsForPath(target_, &events_); |
440 CHECK_NE(last_entry, 0); | 440 DCHECK_NE(last_entry, 0); |
441 | 441 |
442 EventVector responses(last_entry); | 442 EventVector responses(last_entry); |
443 | 443 |
444 int count = HANDLE_EINTR(kevent(kqueue_, &events_[0], last_entry, | 444 int count = HANDLE_EINTR(kevent(kqueue_, &events_[0], last_entry, |
445 &responses[0], last_entry, NULL)); | 445 &responses[0], last_entry, NULL)); |
446 if (!AreKeventValuesValid(&responses[0], count)) { | 446 if (!AreKeventValuesValid(&responses[0], count)) { |
447 // Calling Cancel() here to close any file descriptors that were opened. | 447 // Calling Cancel() here to close any file descriptors that were opened. |
448 // This would happen in the destructor anyways, but FilePathWatchers tend to | 448 // This would happen in the destructor anyways, but FilePathWatchers tend to |
449 // be long lived, and if an error has occurred, there is no reason to waste | 449 // be long lived, and if an error has occurred, there is no reason to waste |
450 // the file descriptors. | 450 // the file descriptors. |
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485 } | 485 } |
486 | 486 |
487 } // namespace | 487 } // namespace |
488 | 488 |
489 FilePathWatcher::FilePathWatcher() { | 489 FilePathWatcher::FilePathWatcher() { |
490 impl_ = new FilePathWatcherImpl(); | 490 impl_ = new FilePathWatcherImpl(); |
491 } | 491 } |
492 | 492 |
493 } // namespace files | 493 } // namespace files |
494 } // namespace base | 494 } // namespace base |
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