file_path_watcher_linux.cc revision 6e8cce623b6e4fe0c9e4af605d675dd9d0338c38
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/files/file_path_watcher.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <errno.h> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string.h> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/inotify.h> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/ioctl.h> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/select.h> 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <unistd.h> 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <algorithm> 15cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include <map> 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <set> 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <utility> 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/bind.h" 217d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles)#include "base/containers/hash_tables.h" 228bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)#include "base/debug/trace_event.h" 23cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "base/files/file_enumerator.h" 242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/files/file_path.h" 256e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles)#include "base/files/file_util.h" 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/lazy_instance.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/location.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/memory/scoped_ptr.h" 30ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch#include "base/message_loop/message_loop.h" 31868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "base/message_loop/message_loop_proxy.h" 322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/posix/eintr_wrapper.h" 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/synchronization/lock.h" 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/threading/thread.h" 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class FilePathWatcherImpl; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Singleton to manage all inotify watches. 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(tony): It would be nice if this wasn't a singleton. 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// http://crbug.com/38174 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class InotifyReader { 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef int Watch; // Watch descriptor used by AddWatch and RemoveWatch. 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const Watch kInvalidWatch = -1; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Watch directory |path| for changes. |watcher| will be notified on each 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // change. Returns kInvalidWatch on failure. 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Watch AddWatch(const FilePath& path, FilePathWatcherImpl* watcher); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Remove |watch| if it's valid. 555c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu void RemoveWatch(Watch watch, FilePathWatcherImpl* watcher); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Callback for InotifyReaderTask. 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void OnInotifyEvent(const inotify_event* event); 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 61f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) friend struct DefaultLazyInstanceTraits<InotifyReader>; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef std::set<FilePathWatcherImpl*> WatcherSet; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) InotifyReader(); 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~InotifyReader(); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We keep track of which delegates want to be notified on which watches. 69f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) hash_map<Watch, WatcherSet> watchers_; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Lock to protect watchers_. 72f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) Lock lock_; 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Separate thread on which we run blocking read for inotify events. 75f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) Thread thread_; 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // File descriptor returned by inotify_init. 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int inotify_fd_; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Use self-pipe trick to unblock select during shutdown. 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int shutdown_pipe_[2]; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Flag set to true when startup was successful. 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool valid_; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(InotifyReader); 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate, 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public MessageLoop::DestructionObserver { 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePathWatcherImpl(); 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Called for each event coming from the watch. |fired_watch| identifies the 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // watch that fired, |child| indicates what has changed, and is relative to 96cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // the currently watched path for |fired_watch|. 97cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // 98cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // |created| is true if the object appears. 99cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // |deleted| is true if the object disappears. 100cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // |is_dir| is true if the object is a directory. 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void OnFilePathChanged(InotifyReader::Watch fired_watch, 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const FilePath::StringType& child, 103cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool created, 104cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool deleted, 105cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool is_dir); 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1075c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu protected: 1085c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu virtual ~FilePathWatcherImpl() {} 1095c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1105c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu private: 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Start watching |path| for changes and notify |delegate| on each change. 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Returns true if watch for |path| has been added successfully. 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual bool Watch(const FilePath& path, 1142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool recursive, 1152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const FilePathWatcher::Callback& callback) OVERRIDE; 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Cancel the watch. This unregisters the instance with InotifyReader. 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void Cancel() OVERRIDE; 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1205c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Cleans up and stops observing the message_loop() thread. 1215c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu virtual void CancelOnMessageLoopThread() OVERRIDE; 1225c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Deletion of the FilePathWatcher will call Cancel() to dispose of this 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // object in the right thread. This also observes destruction of the required 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // cleanup thread, in case it quits before Cancel() is called. 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void WillDestroyCurrentMessageLoop() OVERRIDE; 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Inotify watches are installed for all directory components of |target_|. A 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // WatchEntry instance holds the watch descriptor for a component and the 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // subdirectory for that identifies the next component. If a symbolic link 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // is being watched, the target of the link is also kept. 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct WatchEntry { 1335c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu explicit WatchEntry(const FilePath::StringType& dirname) 1345c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu : watch(InotifyReader::kInvalidWatch), 1355c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu subdir(dirname) {} 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1375c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu InotifyReader::Watch watch; 1385c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu FilePath::StringType subdir; 1395c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu FilePath::StringType linkname; 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef std::vector<WatchEntry> WatchVector; 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Reconfigure to watch for the most specific parent directory of |target_| 144cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // that exists. Also calls UpdateRecursiveWatches() below. 145cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) void UpdateWatches(); 146cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 147cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Reconfigure to recursively watch |target_| and all its sub-directories. 148cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // - This is a no-op if the watch is not recursive. 149cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // - If |target_| does not exist, then clear all the recursive watches. 150cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // - Assuming |target_| exists, passing kInvalidWatch as |fired_watch| forces 151cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // addition of recursive watches for |target_|. 152cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // - Otherwise, only the directory associated with |fired_watch| and its 153cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // sub-directories will be reconfigured. 154cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) void UpdateRecursiveWatches(InotifyReader::Watch fired_watch, bool is_dir); 155cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 156cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Enumerate recursively through |path| and add / update watches. 157cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) void UpdateRecursiveWatchesForPath(const FilePath& path); 158cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 159cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Do internal bookkeeping to update mappings between |watch| and its 160cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // associated full path |path|. 161cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) void TrackWatchForRecursion(InotifyReader::Watch watch, const FilePath& path); 162cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 163cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Remove all the recursive watches. 164cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) void RemoveRecursiveWatches(); 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1665c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // |path| is a symlink to a non-existent target. Attempt to add a watch to 1675c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // the link target's parent directory. Returns true and update |watch_entry| 1685c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // on success. 1695c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu bool AddWatchForBrokenSymlink(const FilePath& path, WatchEntry* watch_entry); 1705c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1715c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu bool HasValidWatchVector() const; 1725c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Callback to notify upon changes. 1742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FilePathWatcher::Callback callback_; 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The file or directory we're supposed to watch. 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath target_; 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 179cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool recursive_; 180cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The vector of watches and next component names for all path components, 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // starting at the root directory. The last entry corresponds to the watch for 1835c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // |target_| and always stores an empty next component name in |subdir|. 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WatchVector watches_; 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 186cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) hash_map<InotifyReader::Watch, FilePath> recursive_paths_by_watch_; 187cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) std::map<FilePath, InotifyReader::Watch> recursive_watches_by_path_; 188cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(FilePathWatcherImpl); 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void InotifyReaderCallback(InotifyReader* reader, int inotify_fd, 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int shutdown_fd) { 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Make sure the file descriptors are good for use with select(). 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_LE(0, inotify_fd); 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GT(FD_SETSIZE, inotify_fd); 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_LE(0, shutdown_fd); 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GT(FD_SETSIZE, shutdown_fd); 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 200f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) debug::TraceLog::GetInstance()->SetCurrentThreadBlocksMessageLoop(); 2018bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (true) { 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) fd_set rfds; 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FD_ZERO(&rfds); 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FD_SET(inotify_fd, &rfds); 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FD_SET(shutdown_fd, &rfds); 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Wait until some inotify events are available. 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int select_result = 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HANDLE_EINTR(select(std::max(inotify_fd, shutdown_fd) + 1, 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &rfds, NULL, NULL, NULL)); 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (select_result < 0) { 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DPLOG(WARNING) << "select failed"; 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (FD_ISSET(shutdown_fd, &rfds)) 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Adjust buffer size to current event queue size. 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int buffer_size; 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int ioctl_result = HANDLE_EINTR(ioctl(inotify_fd, FIONREAD, 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &buffer_size)); 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ioctl_result != 0) { 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DPLOG(WARNING) << "ioctl failed"; 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::vector<char> buffer(buffer_size); 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ssize_t bytes_read = HANDLE_EINTR(read(inotify_fd, &buffer[0], 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffer_size)); 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (bytes_read < 0) { 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DPLOG(WARNING) << "read from inotify fd failed"; 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ssize_t i = 0; 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (i < bytes_read) { 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inotify_event* event = reinterpret_cast<inotify_event*>(&buffer[i]); 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t event_size = sizeof(inotify_event) + event->len; 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(i + event_size <= static_cast<size_t>(bytes_read)); 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reader->OnInotifyEvent(event); 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) i += event_size; 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 251f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)static LazyInstance<InotifyReader>::Leaky g_inotify_reader = 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LAZY_INSTANCE_INITIALIZER; 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)InotifyReader::InotifyReader() 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : thread_("inotify_reader"), 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) inotify_fd_(inotify_init()), 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) valid_(false) { 258f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) if (inotify_fd_ < 0) 259f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) PLOG(ERROR) << "inotify_init() failed"; 260f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) shutdown_pipe_[0] = -1; 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) shutdown_pipe_[1] = -1; 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (inotify_fd_ >= 0 && pipe(shutdown_pipe_) == 0 && thread_.Start()) { 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thread_.message_loop()->PostTask( 2655c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu FROM_HERE, 2665c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu Bind(&InotifyReaderCallback, this, inotify_fd_, shutdown_pipe_[0])); 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) valid_ = true; 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)InotifyReader::~InotifyReader() { 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (valid_) { 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Write to the self-pipe so that the select call in InotifyReaderTask 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // returns. 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ssize_t ret = HANDLE_EINTR(write(shutdown_pipe_[1], "", 1)); 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DPCHECK(ret > 0); 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_EQ(ret, 1); 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thread_.Stop(); 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (inotify_fd_ >= 0) 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) close(inotify_fd_); 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (shutdown_pipe_[0] >= 0) 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) close(shutdown_pipe_[0]); 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (shutdown_pipe_[1] >= 0) 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) close(shutdown_pipe_[1]); 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)InotifyReader::Watch InotifyReader::AddWatch( 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const FilePath& path, FilePathWatcherImpl* watcher) { 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!valid_) 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return kInvalidWatch; 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 293f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) AutoLock auto_lock(lock_); 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Watch watch = inotify_add_watch(inotify_fd_, path.value().c_str(), 296cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) IN_ATTRIB | IN_CREATE | IN_DELETE | 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IN_CLOSE_WRITE | IN_MOVE | 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IN_ONLYDIR); 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (watch == kInvalidWatch) 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return kInvalidWatch; 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) watchers_[watch].insert(watcher); 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return watch; 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3085c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liuvoid InotifyReader::RemoveWatch(Watch watch, FilePathWatcherImpl* watcher) { 3095c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (!valid_ || (watch == kInvalidWatch)) 3105c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return; 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 312f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) AutoLock auto_lock(lock_); 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) watchers_[watch].erase(watcher); 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (watchers_[watch].empty()) { 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) watchers_.erase(watch); 3185c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu inotify_rm_watch(inotify_fd_, watch); 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void InotifyReader::OnInotifyEvent(const inotify_event* event) { 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (event->mask & IN_IGNORED) 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath::StringType child(event->len ? event->name : FILE_PATH_LITERAL("")); 327f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) AutoLock auto_lock(lock_); 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (WatcherSet::iterator watcher = watchers_[event->wd].begin(); 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) watcher != watchers_[event->wd].end(); 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ++watcher) { 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (*watcher)->OnFilePathChanged(event->wd, 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) child, 334cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) event->mask & (IN_CREATE | IN_MOVED_TO), 335cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) event->mask & (IN_DELETE | IN_MOVED_FROM), 336cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) event->mask & IN_ISDIR); 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 340cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)FilePathWatcherImpl::FilePathWatcherImpl() 341cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) : recursive_(false) { 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void FilePathWatcherImpl::OnFilePathChanged(InotifyReader::Watch fired_watch, 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const FilePath::StringType& child, 346cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool created, 347cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool deleted, 348cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool is_dir) { 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!message_loop()->BelongsToCurrentThread()) { 3505c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Switch to message_loop() to access |watches_| safely. 3515c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu message_loop()->PostTask( 3525c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu FROM_HERE, 3535c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu Bind(&FilePathWatcherImpl::OnFilePathChanged, this, 354cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) fired_watch, child, created, deleted, is_dir)); 3555c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return; 3565c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } 3575c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 3585c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Check to see if CancelOnMessageLoopThread() has already been called. 3595c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // May happen when code flow reaches here from the PostTask() above. 3605c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (watches_.empty()) { 3615c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu DCHECK(target_.empty()); 3625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(MessageLoopForIO::current()); 3665c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu DCHECK(HasValidWatchVector()); 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 368cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Used below to avoid multiple recursive updates. 369cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool did_update = false; 370cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Find the entry in |watches_| that corresponds to |fired_watch|. 3725c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu for (size_t i = 0; i < watches_.size(); ++i) { 3735c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu const WatchEntry& watch_entry = watches_[i]; 3745c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (fired_watch != watch_entry.watch) 3755c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu continue; 3765c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 3775c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Check whether a path component of |target_| changed. 3785c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu bool change_on_target_path = 3795c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu child.empty() || 3805c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu (child == watch_entry.linkname) || 3815c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu (child == watch_entry.subdir); 3825c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 3835c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Check if the change references |target_| or a direct child of |target_|. 3845c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu bool is_watch_for_target = watch_entry.subdir.empty(); 3855c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu bool target_changed = 3865c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu (is_watch_for_target && (child == watch_entry.linkname)) || 3875c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu (is_watch_for_target && watch_entry.linkname.empty()) || 3885c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu (watch_entry.subdir == child && watches_[i + 1].subdir.empty()); 3895c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 3905c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Update watches if a directory component of the |target_| path 3915c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // (dis)appears. Note that we don't add the additional restriction of 3925c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // checking the event mask to see if it is for a directory here as changes 3935c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // to symlinks on the target path will not have IN_ISDIR set in the event 3945c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // masks. As a result we may sometimes call UpdateWatches() unnecessarily. 395cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (change_on_target_path && (created || deleted) && !did_update) { 396cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) UpdateWatches(); 397cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) did_update = true; 3985c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } 3995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4005c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Report the following events: 4015c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // - The target or a direct child of the target got changed (in case the 4025c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // watched path refers to a directory). 4035c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // - One of the parent directories got moved or deleted, since the target 4045c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // disappears in this case. 4055c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // - One of the parent directories appears. The event corresponding to 4065c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // the target appearing might have been missed in this case, so recheck. 4075c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (target_changed || 408cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) (change_on_target_path && deleted) || 409cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) (change_on_target_path && created && PathExists(target_))) { 410cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!did_update) { 411cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) UpdateRecursiveWatches(fired_watch, is_dir); 412cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) did_update = true; 413cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 4145c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu callback_.Run(target_, false /* error */); 4155c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return; 4165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 418cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 419cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (ContainsKey(recursive_paths_by_watch_, fired_watch)) { 420cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!did_update) 421cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) UpdateRecursiveWatches(fired_watch, is_dir); 422cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) callback_.Run(target_, false /* error */); 423cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool FilePathWatcherImpl::Watch(const FilePath& path, 4272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool recursive, 4282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const FilePathWatcher::Callback& callback) { 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(target_.empty()); 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(MessageLoopForIO::current()); 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 432f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) set_message_loop(MessageLoopProxy::current().get()); 4332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback_ = callback; 4345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) target_ = path; 435cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_ = recursive; 4365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MessageLoop::current()->AddDestructionObserver(this); 4375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::vector<FilePath::StringType> comps; 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) target_.GetComponents(&comps); 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!comps.empty()); 4415c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu for (size_t i = 1; i < comps.size(); ++i) 4425c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu watches_.push_back(WatchEntry(comps[i])); 4435c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu watches_.push_back(WatchEntry(FilePath::StringType())); 444cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) UpdateWatches(); 445cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return true; 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void FilePathWatcherImpl::Cancel() { 4492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (callback_.is_null()) { 4505c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Watch was never called, or the message_loop() thread is already gone. 4515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) set_cancelled(); 4525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 4535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4555c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Switch to the message_loop() if necessary so we can access |watches_|. 4565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!message_loop()->BelongsToCurrentThread()) { 4575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) message_loop()->PostTask(FROM_HERE, 458f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) Bind(&FilePathWatcher::CancelWatch, 4595c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu make_scoped_refptr(this))); 4605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 4615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CancelOnMessageLoopThread(); 4625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void FilePathWatcherImpl::CancelOnMessageLoopThread() { 466f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) DCHECK(message_loop()->BelongsToCurrentThread()); 4675c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu set_cancelled(); 4685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!callback_.is_null()) { 4705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MessageLoop::current()->RemoveDestructionObserver(this); 4712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback_.Reset(); 4725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4745c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu for (size_t i = 0; i < watches_.size(); ++i) 4755c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu g_inotify_reader.Get().RemoveWatch(watches_[i].watch, this); 4765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) watches_.clear(); 4775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) target_.clear(); 478cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 479cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (recursive_) 480cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) RemoveRecursiveWatches(); 4815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void FilePathWatcherImpl::WillDestroyCurrentMessageLoop() { 4845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CancelOnMessageLoopThread(); 4855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 487cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void FilePathWatcherImpl::UpdateWatches() { 4885c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Ensure this runs on the message_loop() exclusively in order to avoid 4895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // concurrency issues. 4905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop()->BelongsToCurrentThread()); 4915c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu DCHECK(HasValidWatchVector()); 4925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Walk the list of watches and update them as we go. 4945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FilePath path(FILE_PATH_LITERAL("/")); 4955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool path_valid = true; 4965c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu for (size_t i = 0; i < watches_.size(); ++i) { 4975c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu WatchEntry& watch_entry = watches_[i]; 4985c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu InotifyReader::Watch old_watch = watch_entry.watch; 4995c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu watch_entry.watch = InotifyReader::kInvalidWatch; 5005c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu watch_entry.linkname.clear(); 5015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (path_valid) { 5025c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu watch_entry.watch = g_inotify_reader.Get().AddWatch(path, this); 5035c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (watch_entry.watch == InotifyReader::kInvalidWatch) { 5045c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (IsLink(path)) { 5055c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu path_valid = AddWatchForBrokenSymlink(path, &watch_entry); 5065c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } else { 5075c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu path_valid = false; 5085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5115c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (old_watch != watch_entry.watch) 5125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_inotify_reader.Get().RemoveWatch(old_watch, this); 5135c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu path = path.Append(watch_entry.subdir); 5145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 516cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) UpdateRecursiveWatches(InotifyReader::kInvalidWatch, 517cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) false /* is directory? */); 518cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 519cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 520cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void FilePathWatcherImpl::UpdateRecursiveWatches( 521cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) InotifyReader::Watch fired_watch, 522cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool is_dir) { 523cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!recursive_) 524cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 525cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 526cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!DirectoryExists(target_)) { 527cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) RemoveRecursiveWatches(); 528cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 529cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 530cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 531cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Check to see if this is a forced update or if some component of |target_| 532cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // has changed. For these cases, redo the watches for |target_| and below. 533cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!ContainsKey(recursive_paths_by_watch_, fired_watch)) { 534cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) UpdateRecursiveWatchesForPath(target_); 535cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 536cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 537cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 538cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Underneath |target_|, only directory changes trigger watch updates. 539cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!is_dir) 540cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 541cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 542cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const FilePath& changed_dir = recursive_paths_by_watch_[fired_watch]; 543cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 544cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) std::map<FilePath, InotifyReader::Watch>::iterator start_it = 545cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_watches_by_path_.lower_bound(changed_dir); 546cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) std::map<FilePath, InotifyReader::Watch>::iterator end_it = start_it; 547cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) for (; end_it != recursive_watches_by_path_.end(); ++end_it) { 548cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const FilePath& cur_path = end_it->first; 549cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!changed_dir.IsParent(cur_path)) 550cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) break; 551cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!DirectoryExists(cur_path)) 552cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) g_inotify_reader.Get().RemoveWatch(end_it->second, this); 553cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 554cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_watches_by_path_.erase(start_it, end_it); 555cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) UpdateRecursiveWatchesForPath(changed_dir); 556cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 557cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 558cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void FilePathWatcherImpl::UpdateRecursiveWatchesForPath(const FilePath& path) { 559cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(recursive_); 560cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(!path.empty()); 561cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(DirectoryExists(path)); 562cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 563cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Note: SHOW_SYM_LINKS exposes symlinks as symlinks, so they are ignored 564cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // rather than followed. Following symlinks can easily lead to the undesirable 565cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // situation where the entire file system is being watched. 566cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) FileEnumerator enumerator( 567cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) path, 568cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) true /* recursive enumeration */, 569cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) FileEnumerator::DIRECTORIES | FileEnumerator::SHOW_SYM_LINKS); 570cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) for (FilePath current = enumerator.Next(); 571cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) !current.empty(); 572cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) current = enumerator.Next()) { 573cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(enumerator.GetInfo().IsDirectory()); 574cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 575cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!ContainsKey(recursive_watches_by_path_, current)) { 576cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Add new watches. 577cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) InotifyReader::Watch watch = 578cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) g_inotify_reader.Get().AddWatch(current, this); 579cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TrackWatchForRecursion(watch, current); 580cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } else { 581cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Update existing watches. 582cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) InotifyReader::Watch old_watch = recursive_watches_by_path_[current]; 583cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK_NE(InotifyReader::kInvalidWatch, old_watch); 584cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) InotifyReader::Watch watch = 585cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) g_inotify_reader.Get().AddWatch(current, this); 586cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (watch != old_watch) { 587cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) g_inotify_reader.Get().RemoveWatch(old_watch, this); 588cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_paths_by_watch_.erase(old_watch); 589cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_watches_by_path_.erase(current); 590cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TrackWatchForRecursion(watch, current); 591cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 592cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 593cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 594cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 595cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 596cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void FilePathWatcherImpl::TrackWatchForRecursion(InotifyReader::Watch watch, 597cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const FilePath& path) { 598cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(recursive_); 599cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(!path.empty()); 600cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(target_.IsParent(path)); 601cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 602cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (watch == InotifyReader::kInvalidWatch) 603cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 604cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 605cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(!ContainsKey(recursive_paths_by_watch_, watch)); 606cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(!ContainsKey(recursive_watches_by_path_, path)); 607cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_paths_by_watch_[watch] = path; 608cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_watches_by_path_[path] = watch; 609cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 610cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 611cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void FilePathWatcherImpl::RemoveRecursiveWatches() { 612cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!recursive_) 613cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 614cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 615cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) for (hash_map<InotifyReader::Watch, FilePath>::const_iterator it = 616cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_paths_by_watch_.begin(); 617cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) it != recursive_paths_by_watch_.end(); 618cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ++it) { 619cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) g_inotify_reader.Get().RemoveWatch(it->first, this); 620cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 621cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_paths_by_watch_.clear(); 622cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) recursive_watches_by_path_.clear(); 6235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6255c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liubool FilePathWatcherImpl::AddWatchForBrokenSymlink(const FilePath& path, 6265c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu WatchEntry* watch_entry) { 6275c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu DCHECK_EQ(InotifyReader::kInvalidWatch, watch_entry->watch); 6285c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu FilePath link; 6295c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (!ReadSymbolicLink(path, &link)) 6305c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return false; 6315c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 6325c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (!link.IsAbsolute()) 6335c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu link = path.DirName().Append(link); 6345c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 6355c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Try watching symlink target directory. If the link target is "/", then we 6365c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // shouldn't get here in normal situations and if we do, we'd watch "/" for 6375c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // changes to a component "/" which is harmless so no special treatment of 6385c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // this case is required. 6395c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu InotifyReader::Watch watch = 6405c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu g_inotify_reader.Get().AddWatch(link.DirName(), this); 6415c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (watch == InotifyReader::kInvalidWatch) { 6425c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // TODO(craig) Symlinks only work if the parent directory for the target 6435c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // exist. Ideally we should make sure we've watched all the components of 6445c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // the symlink path for changes. See crbug.com/91561 for details. 6455c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu DPLOG(WARNING) << "Watch failed for " << link.DirName().value(); 6465c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return false; 6475c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } 6485c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu watch_entry->watch = watch; 6495c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu watch_entry->linkname = link.BaseName().value(); 6505c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return true; 6515c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu} 6525c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 6535c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liubool FilePathWatcherImpl::HasValidWatchVector() const { 6545c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (watches_.empty()) 6555c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return false; 6565c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu for (size_t i = 0; i < watches_.size() - 1; ++i) { 6575c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (watches_[i].subdir.empty()) 6585c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return false; 6595c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } 6605c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return watches_[watches_.size() - 1].subdir.empty(); 6615c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu} 6625c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 6635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 6645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FilePathWatcher::FilePathWatcher() { 6665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) impl_ = new FilePathWatcherImpl(); 6675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 670