kevent[] CreateChangeList(ref List <int> FdList)
{
if (FdList.Count == 0)
{
return(emptyEventList);
}
var changes = new List <kevent> ();
foreach (int fd in FdList)
{
var change = new kevent {
ident = (UIntPtr)fd,
filter = EventFilter.Vnode,
flags = EventFlags.Add | EventFlags.Enable | EventFlags.Clear,
fflags = FilterFlags.VNodeDelete | FilterFlags.VNodeExtend |
FilterFlags.VNodeRename | FilterFlags.VNodeAttrib |
FilterFlags.VNodeLink | FilterFlags.VNodeRevoke |
FilterFlags.VNodeWrite,
data = IntPtr.Zero,
udata = IntPtr.Zero
};
changes.Add(change);
}
FdList.Clear();
return(changes.ToArray());
}
void Setup ()
{
var initialFds = new List<int> ();
// fsw.FullPath may end in '/', see https://bugzilla.xamarin.com/show_bug.cgi?id=5747
if (fsw.FullPath != "/" && fsw.FullPath.EndsWith ("/", StringComparison.Ordinal))
fullPathNoLastSlash = fsw.FullPath.Substring (0, fsw.FullPath.Length - 1);
else
fullPathNoLastSlash = fsw.FullPath;
// GetFilenameFromFd() returns the *realpath* which can be different than fsw.FullPath because symlinks.
// If so, introduce a fixup step.
int fd = open (fullPathNoLastSlash, O_EVTONLY, 0);
var resolvedFullPath = GetFilenameFromFd (fd);
close (fd);
if (resolvedFullPath != fullPathNoLastSlash)
fixupPath = resolvedFullPath;
else
fixupPath = null;
Scan (fullPathNoLastSlash, false, ref initialFds);
var immediate_timeout = new timespec { tv_sec = (IntPtr)0, tv_usec = (IntPtr)0 };
var eventBuffer = new kevent[0]; // we don't want to take any events from the queue at this point
var changes = CreateChangeList (ref initialFds);
int numEvents = kevent (conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref immediate_timeout);
if (numEvents == -1) {
var errMsg = String.Format ("kevent() error at initial event registration, error code = '{0}'", Marshal.GetLastWin32Error ());
throw new IOException (errMsg);
}
}
private void Monitor()
{
while (!KeventWatcher.stop)
{
kevent ev = default(kevent);
ev.udata = IntPtr.Zero;
kevent kevent = default(kevent);
kevent.udata = IntPtr.Zero;
timespec timespec = default(timespec);
timespec.tv_sec = 0;
timespec.tv_usec = 0;
int num;
lock (this)
{
num = KeventWatcher.kevent(KeventWatcher.conn, ref kevent, 0, ref ev, 1, ref timespec);
}
if (num > 0)
{
KeventData data = (KeventData)KeventWatcher.requests[ev.ident];
KeventWatcher.StopMonitoringDirectory(data);
KeventWatcher.StartMonitoringDirectory(data);
this.ProcessEvent(ev);
}
else
{
Thread.Sleep(500);
}
}
lock (this)
{
KeventWatcher.thread = null;
KeventWatcher.stop = false;
}
}
void Monitor()
{
while (!stop)
{
kevent ev = new kevent();
ev.udata = IntPtr.Zero;
kevent nullev = new kevent();
nullev.udata = IntPtr.Zero;
timespec ts = new timespec();
ts.tv_sec = 0;
ts.tv_usec = 0;
int haveEvents;
lock (this) {
haveEvents = kevent(conn, ref nullev, 0, ref ev, 1, ref ts);
}
if (haveEvents > 0)
{
// Restart monitoring
KeventData data = (KeventData)requests [ev.ident];
StopMonitoringDirectory(data);
StartMonitoringDirectory(data);
ProcessEvent(ev);
}
else
{
System.Threading.Thread.Sleep(500);
}
}
lock (this) {
thread = null;
stop = false;
}
}
private void Monitor()
{
while (!stop)
{
kevent evtlist = default(kevent);
evtlist.udata = IntPtr.Zero;
kevent ev = default(kevent);
ev.udata = IntPtr.Zero;
timespec ts = default(timespec);
ts.tv_sec = 0;
ts.tv_usec = 0;
int num;
lock (this)
{
num = kevent(conn, ref ev, 0, ref evtlist, 1, ref ts);
}
if (num > 0)
{
KeventData data = (KeventData)requests[evtlist.ident];
StopMonitoringDirectory(data);
StartMonitoringDirectory(data);
ProcessEvent(evtlist);
}
else
{
Thread.Sleep(500);
}
}
lock (this)
{
thread = null;
stop = false;
}
}
void Setup()
{
var initialFds = new List <int> ();
// fsw.FullPath may end in '/', see https://bugzilla.xamarin.com/show_bug.cgi?id=5747
if (fsw.FullPath != "/" && fsw.FullPath.EndsWith("/", StringComparison.Ordinal))
{
fullPathNoLastSlash = fsw.FullPath.Substring(0, fsw.FullPath.Length - 1);
}
else
{
fullPathNoLastSlash = fsw.FullPath;
}
// realpath() returns the *realpath* which can be different than fsw.FullPath because symlinks.
// If so, introduce a fixup step.
var sb = new StringBuilder(__DARWIN_MAXPATHLEN);
if (realpath(fsw.FullPath, sb) == IntPtr.Zero)
{
var errMsg = String.Format("realpath({0}) failed, error code = '{1}'", fsw.FullPath, Marshal.GetLastWin32Error());
throw new IOException(errMsg);
}
var resolvedFullPath = sb.ToString();
if (resolvedFullPath != fullPathNoLastSlash)
{
fixupPath = resolvedFullPath;
}
else
{
fixupPath = null;
}
Scan(fullPathNoLastSlash, false, ref initialFds);
var immediate_timeout = new timespec {
tv_sec = (IntPtr)0, tv_nsec = (IntPtr)0
};
var eventBuffer = new kevent[0]; // we don't want to take any events from the queue at this point
var changes = CreateChangeList(ref initialFds);
int numEvents;
int errno = 0;
do
{
numEvents = kevent(conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref immediate_timeout);
if (numEvents == -1)
{
errno = Marshal.GetLastWin32Error();
}
} while (numEvents == -1 && errno == EINTR);
if (numEvents == -1)
{
var errMsg = String.Format("kevent() error at initial event registration, error code = '{0}'", errno);
throw new IOException(errMsg);
}
}
static void StartMonitoringDirectory(KeventData data)
{
DirectoryInfo dir = new DirectoryInfo(data.Directory);
if (data.DirEntries == null)
{
data.DirEntries = new Hashtable();
foreach (FileSystemInfo fsi in dir.GetFileSystemInfos())
{
data.DirEntries.Add(fsi.FullName, new KeventFileData(fsi, fsi.LastAccessTime, fsi.LastWriteTime));
}
}
int fd = open(data.Directory, 0, 0);
kevent ev = new kevent();
ev.udata = IntPtr.Zero;
timespec nullts = new timespec();
nullts.tv_sec = 0;
nullts.tv_usec = 0;
if (fd > 0)
{
ev.ident = fd;
ev.filter = EventFilter.Vnode;
ev.flags = EventFlags.Add | EventFlags.Enable | EventFlags.OneShot;
ev.fflags = // 20 | 2 | 1 | 8;
FilterFlags.VNodeDelete |
FilterFlags.VNodeWrite |
FilterFlags.VNodeAttrib |
// The following two values are the equivalent of the original value "20", but we suspect the original author meant
// 0x20, we will review later with some test cases
FilterFlags.VNodeLink |
FilterFlags.VNodeExtend;
ev.data = 0;
ev.udata = Marshal.StringToHGlobalAuto(data.Directory);
kevent outev = new kevent();
outev.udata = IntPtr.Zero;
kevent(conn, ref ev, 1, ref outev, 0, ref nullts);
data.ev = ev;
requests [fd] = data;
}
if (!data.IncludeSubdirs)
{
return;
}
}
static void StartMonitoringDirectory(KeventData data)
{
DirectoryInfo dir = new DirectoryInfo(data.Directory);
if (data.DirEntries == null)
{
data.DirEntries = new Hashtable();
foreach (FileSystemInfo fsi in dir.GetFileSystemInfos())
{
data.DirEntries.Add(fsi.FullName, new KeventFileData(fsi, fsi.LastAccessTime, fsi.LastWriteTime));
}
}
int fd = open(data.Directory, 0, 0);
kevent ev = new kevent();
ev.udata = IntPtr.Zero;
timespec nullts = new timespec();
nullts.tv_sec = 0;
nullts.tv_usec = 0;
if (fd > 0)
{
ev.ident = fd;
ev.filter = -4;
ev.flags = 1 | 4 | 20;
ev.fflags = 20 | 2 | 1 | 8;
ev.data = 0;
ev.udata = Marshal.StringToHGlobalAuto(data.Directory);
kevent outev = new kevent();
outev.udata = IntPtr.Zero;
kevent(conn, ref ev, 1, ref outev, 0, ref nullts);
data.ev = ev;
requests [fd] = data;
}
if (!data.IncludeSubdirs)
{
return;
}
}
private static void StartMonitoringDirectory(KeventData data)
{
DirectoryInfo directoryInfo = new DirectoryInfo(data.Directory);
if (data.DirEntries == null)
{
data.DirEntries = new Hashtable();
FileSystemInfo[] fileSystemInfos = directoryInfo.GetFileSystemInfos();
foreach (FileSystemInfo fileSystemInfo in fileSystemInfos)
{
data.DirEntries.Add(fileSystemInfo.FullName, new KeventFileData(fileSystemInfo, fileSystemInfo.LastAccessTime, fileSystemInfo.LastWriteTime));
}
}
int num = open(data.Directory, 0, 0);
kevent ev = default(kevent);
ev.udata = IntPtr.Zero;
timespec ts = default(timespec);
ts.tv_sec = 0;
ts.tv_usec = 0;
if (num > 0)
{
ev.ident = num;
ev.filter = -4;
ev.flags = 21;
ev.fflags = 31u;
ev.data = 0;
ev.udata = Marshal.StringToHGlobalAuto(data.Directory);
kevent evtlist = default(kevent);
evtlist.udata = IntPtr.Zero;
kevent(conn, ref ev, 1, ref evtlist, 0, ref ts);
data.ev = ev;
requests[num] = data;
}
if (data.IncludeSubdirs)
{
}
}
void Setup()
{
var initialFds = new List <int> ();
// GetFilenameFromFd() returns the *realpath* which can be different than fsw.FullPath because symlinks.
// If so, introduce a fixup step.
int fd = open(fsw.FullPath, O_EVTONLY, 0);
var resolvedFullPath = GetFilenameFromFd(fd);
close(fd);
if (resolvedFullPath != fsw.FullPath)
{
fixupPath = resolvedFullPath;
}
else
{
fixupPath = null;
}
Scan(fsw.FullPath, false, ref initialFds);
var immediate_timeout = new timespec {
tv_sec = (IntPtr)0, tv_usec = (IntPtr)0
};
var eventBuffer = new kevent[0]; // we don't want to take any events from the queue at this point
var changes = CreateChangeList(ref initialFds);
int numEvents = kevent(conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref immediate_timeout);
if (numEvents == -1)
{
var errMsg = String.Format("kevent() error at initial event registration, error code = '{0}'", Marshal.GetLastWin32Error());
throw new IOException(errMsg);
}
}
static void StartMonitoringDirectory (KeventData data)
{
DirectoryInfo dir = new DirectoryInfo (data.Directory);
if(data.DirEntries == null) {
data.DirEntries = new Hashtable();
foreach (FileSystemInfo fsi in dir.GetFileSystemInfos() )
data.DirEntries.Add(fsi.FullName, new KeventFileData(fsi, fsi.LastAccessTime, fsi.LastWriteTime));
}
int fd = open(data.Directory, 0, 0);
kevent ev = new kevent();
ev.udata = IntPtr.Zero;
timespec nullts = new timespec();
nullts.tv_sec = 0;
nullts.tv_usec = 0;
if (fd > 0) {
ev.ident = fd;
ev.filter = -4;
ev.flags = 1 | 4 | 20;
ev.fflags = 20 | 2 | 1 | 8;
ev.data = 0;
ev.udata = Marshal.StringToHGlobalAuto (data.Directory);
kevent outev = new kevent();
outev.udata = IntPtr.Zero;
kevent (conn, ref ev, 1, ref outev, 0, ref nullts);
data.ev = ev;
requests [fd] = data;
}
if (!data.IncludeSubdirs)
return;
}
void Monitor()
{
var timeout = new timespec {
tv_sec = (IntPtr)0, tv_usec = (IntPtr)500000000
};
var eventBuffer = new kevent[32];
var newFds = new List <int> ();
List <PathData> removeQueue = new List <PathData> ();
List <string> rescanQueue = new List <string> ();
while (!requestStop)
{
var changes = CreateChangeList(ref newFds);
int numEvents = kevent(conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref timeout);
if (numEvents == -1)
{
var errMsg = String.Format("kevent() error, error code = '{0}'", Marshal.GetLastWin32Error());
fsw.OnError(new ErrorEventArgs(new IOException(errMsg)));
}
if (numEvents == 0)
{
continue;
}
for (var i = 0; i < numEvents; i++)
{
var kevt = eventBuffer [i];
var pathData = fdsDict [(int)kevt.ident];
if ((kevt.flags & EventFlags.Error) == EventFlags.Error)
{
var errMsg = String.Format("kevent() error watching path '{0}', error code = '{1}'", pathData.Path, kevt.data);
fsw.OnError(new ErrorEventArgs(new IOException(errMsg)));
continue;
}
if ((kevt.fflags & FilterFlags.VNodeDelete) == FilterFlags.VNodeDelete || (kevt.fflags & FilterFlags.VNodeRevoke) == FilterFlags.VNodeRevoke)
{
removeQueue.Add(pathData);
}
else if ((kevt.fflags & FilterFlags.VNodeWrite) == FilterFlags.VNodeWrite)
{
if (pathData.IsDirectory)
{
rescanQueue.Add(pathData.Path);
}
else
{
PostEvent(FileAction.Modified, pathData.Path);
}
}
else if ((kevt.fflags & FilterFlags.VNodeRename) == FilterFlags.VNodeRename)
{
var newFilename = GetFilenameFromFd(pathData.Fd);
if (newFilename.StartsWith(fsw.FullPath))
{
Rename(pathData, newFilename);
}
else //moved outside of our watched dir so stop watching
{
RemoveTree(pathData);
}
}
else if ((kevt.fflags & FilterFlags.VNodeAttrib) == FilterFlags.VNodeAttrib || (kevt.fflags & FilterFlags.VNodeExtend) == FilterFlags.VNodeExtend)
{
PostEvent(FileAction.Modified, pathData.Path);
}
}
removeQueue.ForEach(Remove);
removeQueue.Clear();
rescanQueue.ForEach(path => {
Scan(path, true, ref newFds);
});
rescanQueue.Clear();
}
}
void Monitor ()
{
var eventBuffer = new kevent[32];
var newFds = new List<int> ();
List<PathData> removeQueue = new List<PathData> ();
List<string> rescanQueue = new List<string> ();
int retries = 0;
while (!requestStop) {
var changes = CreateChangeList (ref newFds);
// We are calling an icall, so have to marshal manually
// Marshal in
int ksize = Marshal.SizeOf<kevent> ();
var changesNative = Marshal.AllocHGlobal (ksize * changes.Length);
for (int i = 0; i < changes.Length; ++i)
Marshal.StructureToPtr (changes [i], changesNative + (i * ksize), false);
var eventBufferNative = Marshal.AllocHGlobal (ksize * eventBuffer.Length);
int numEvents = kevent_notimeout (ref conn, changesNative, changes.Length, eventBufferNative, eventBuffer.Length);
// Marshal out
Marshal.FreeHGlobal (changesNative);
for (int i = 0; i < numEvents; ++i)
eventBuffer [i] = Marshal.PtrToStructure<kevent> (eventBufferNative + (i * ksize));
Marshal.FreeHGlobal (eventBufferNative);
if (numEvents == -1) {
// Stop () signals us to stop by closing the connection
if (requestStop)
break;
if (++retries == 3)
throw new IOException (String.Format (
"persistent kevent() error, error code = '{0}'", Marshal.GetLastWin32Error ()));
continue;
}
retries = 0;
for (var i = 0; i < numEvents; i++) {
var kevt = eventBuffer [i];
if (!fdsDict.ContainsKey ((int)kevt.ident))
// The event is for a file that was removed
continue;
var pathData = fdsDict [(int)kevt.ident];
if ((kevt.flags & EventFlags.Error) == EventFlags.Error) {
var errMsg = String.Format ("kevent() error watching path '{0}', error code = '{1}'", pathData.Path, kevt.data);
fsw.DispatchErrorEvents (new ErrorEventArgs (new IOException (errMsg)));
continue;
}
if ((kevt.fflags & FilterFlags.VNodeDelete) == FilterFlags.VNodeDelete || (kevt.fflags & FilterFlags.VNodeRevoke) == FilterFlags.VNodeRevoke) {
if (pathData.Path == fullPathNoLastSlash)
// The root path is deleted; exit silently
return;
removeQueue.Add (pathData);
continue;
}
if ((kevt.fflags & FilterFlags.VNodeRename) == FilterFlags.VNodeRename) {
UpdatePath (pathData);
}
if ((kevt.fflags & FilterFlags.VNodeWrite) == FilterFlags.VNodeWrite) {
if (pathData.IsDirectory) //TODO: Check if dirs trigger Changed events on .NET
rescanQueue.Add (pathData.Path);
else
PostEvent (FileAction.Modified, pathData.Path);
}
if ((kevt.fflags & FilterFlags.VNodeAttrib) == FilterFlags.VNodeAttrib || (kevt.fflags & FilterFlags.VNodeExtend) == FilterFlags.VNodeExtend)
PostEvent (FileAction.Modified, pathData.Path);
}
removeQueue.ForEach (Remove);
removeQueue.Clear ();
rescanQueue.ForEach (path => {
Scan (path, true, ref newFds);
});
rescanQueue.Clear ();
}
}
kevent[] CreateChangeList (ref List<int> FdList)
{
if (FdList.Count == 0)
return emptyEventList;
var changes = new List<kevent> ();
foreach (int fd in FdList) {
var change = new kevent {
ident = (UIntPtr)fd,
filter = EventFilter.Vnode,
flags = EventFlags.Add | EventFlags.Enable | EventFlags.Clear,
fflags = FilterFlags.VNodeDelete | FilterFlags.VNodeExtend |
FilterFlags.VNodeRename | FilterFlags.VNodeAttrib |
FilterFlags.VNodeLink | FilterFlags.VNodeRevoke |
FilterFlags.VNodeWrite,
data = IntPtr.Zero,
udata = IntPtr.Zero
};
changes.Add (change);
}
FdList.Clear ();
return changes.ToArray ();
}
void Setup ()
{
var initialFds = new List<int> ();
// fsw.FullPath may end in '/', see https://bugzilla.xamarin.com/show_bug.cgi?id=5747
if (fsw.FullPath != "/" && fsw.FullPath.EndsWith ("/", StringComparison.Ordinal))
fullPathNoLastSlash = fsw.FullPath.Substring (0, fsw.FullPath.Length - 1);
else
fullPathNoLastSlash = fsw.FullPath;
// GetFilenameFromFd() returns the *realpath* which can be different than fsw.FullPath because symlinks.
// If so, introduce a fixup step.
int fd = open (fullPathNoLastSlash, O_EVTONLY, 0);
var resolvedFullPath = GetFilenameFromFd (fd);
close (fd);
if (resolvedFullPath != fullPathNoLastSlash)
fixupPath = resolvedFullPath;
else
fixupPath = null;
Scan (fullPathNoLastSlash, false, ref initialFds);
var immediate_timeout = new timespec { tv_sec = (IntPtr)0, tv_nsec = (IntPtr)0 };
var eventBuffer = new kevent[0]; // we don't want to take any events from the queue at this point
var changes = CreateChangeList (ref initialFds);
int numEvents = kevent (conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref immediate_timeout);
if (numEvents == -1) {
var errMsg = String.Format ("kevent() error at initial event registration, error code = '{0}'", Marshal.GetLastWin32Error ());
throw new IOException (errMsg);
}
}
void Monitor ()
{
var timeout = new timespec { tv_sec = (IntPtr)0, tv_usec = (IntPtr)500000000 };
var eventBuffer = new kevent[32];
var newFds = new List<int> ();
List<PathData> removeQueue = new List<PathData> ();
List<string> rescanQueue = new List<string> ();
int retries = 0;
while (!requestStop) {
var changes = CreateChangeList (ref newFds);
int numEvents = kevent (conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref timeout);
if (numEvents == -1) {
if (++retries == 3)
throw new IOException (String.Format (
"persistent kevent() error, error code = '{0}'", Marshal.GetLastWin32Error ()));
continue;
}
retries = 0;
for (var i = 0; i < numEvents; i++) {
var kevt = eventBuffer [i];
var pathData = fdsDict [(int)kevt.ident];
if ((kevt.flags & EventFlags.Error) == EventFlags.Error) {
var errMsg = String.Format ("kevent() error watching path '{0}', error code = '{1}'", pathData.Path, kevt.data);
fsw.DispatchErrorEvents (new ErrorEventArgs (new IOException (errMsg)));
continue;
}
if ((kevt.fflags & FilterFlags.VNodeDelete) == FilterFlags.VNodeDelete || (kevt.fflags & FilterFlags.VNodeRevoke) == FilterFlags.VNodeRevoke) {
removeQueue.Add (pathData);
continue;
}
if ((kevt.fflags & FilterFlags.VNodeRename) == FilterFlags.VNodeRename) {
UpdatePath (pathData);
}
if ((kevt.fflags & FilterFlags.VNodeWrite) == FilterFlags.VNodeWrite) {
if (pathData.IsDirectory) //TODO: Check if dirs trigger Changed events on .NET
rescanQueue.Add (pathData.Path);
else
PostEvent (FileAction.Modified, pathData.Path);
}
if ((kevt.fflags & FilterFlags.VNodeAttrib) == FilterFlags.VNodeAttrib || (kevt.fflags & FilterFlags.VNodeExtend) == FilterFlags.VNodeExtend)
PostEvent (FileAction.Modified, pathData.Path);
}
removeQueue.ForEach (Remove);
removeQueue.Clear ();
rescanQueue.ForEach (path => {
Scan (path, true, ref newFds);
});
rescanQueue.Clear ();
}
}
void Monitor()
{
var timeout = new timespec {
tv_sec = (IntPtr)0, tv_usec = (IntPtr)500000000
};
var eventBuffer = new kevent[32];
var newFds = new List <int> ();
List <PathData> removeQueue = new List <PathData> ();
List <string> rescanQueue = new List <string> ();
int retries = 0;
while (!requestStop)
{
var changes = CreateChangeList(ref newFds);
int numEvents = kevent(conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref timeout);
if (numEvents == -1)
{
if (++retries == 3)
{
throw new IOException(String.Format(
"persistent kevent() error, error code = '{0}'", Marshal.GetLastWin32Error()));
}
continue;
}
retries = 0;
for (var i = 0; i < numEvents; i++)
{
var kevt = eventBuffer [i];
var pathData = fdsDict [(int)kevt.ident];
if ((kevt.flags & EventFlags.Error) == EventFlags.Error)
{
var errMsg = String.Format("kevent() error watching path '{0}', error code = '{1}'", pathData.Path, kevt.data);
fsw.DispatchErrorEvents(new ErrorEventArgs(new IOException(errMsg)));
continue;
}
if ((kevt.fflags & FilterFlags.VNodeDelete) == FilterFlags.VNodeDelete || (kevt.fflags & FilterFlags.VNodeRevoke) == FilterFlags.VNodeRevoke)
{
removeQueue.Add(pathData);
continue;
}
if ((kevt.fflags & FilterFlags.VNodeRename) == FilterFlags.VNodeRename)
{
UpdatePath(pathData);
}
if ((kevt.fflags & FilterFlags.VNodeWrite) == FilterFlags.VNodeWrite)
{
if (pathData.IsDirectory) //TODO: Check if dirs trigger Changed events on .NET
{
rescanQueue.Add(pathData.Path);
}
else
{
PostEvent(FileAction.Modified, pathData.Path);
}
}
if ((kevt.fflags & FilterFlags.VNodeAttrib) == FilterFlags.VNodeAttrib || (kevt.fflags & FilterFlags.VNodeExtend) == FilterFlags.VNodeExtend)
{
PostEvent(FileAction.Modified, pathData.Path);
}
}
removeQueue.ForEach(Remove);
removeQueue.Clear();
rescanQueue.ForEach(path => {
Scan(path, true, ref newFds);
});
rescanQueue.Clear();
}
}
private void ProcessEvent(kevent ev)
{
lock (this)
{
KeventData keventData = (KeventData)KeventWatcher.requests[ev.ident];
if (keventData.Enabled)
{
string text = string.Empty;
FileSystemWatcher fsw = keventData.FSW;
DirectoryInfo directoryInfo = new DirectoryInfo(keventData.Directory);
FileSystemInfo changedFsi = null;
try
{
foreach (FileSystemInfo fileSystemInfo in directoryInfo.GetFileSystemInfos())
{
if (keventData.DirEntries.ContainsKey(fileSystemInfo.FullName) && fileSystemInfo is FileInfo)
{
KeventFileData keventFileData = (KeventFileData)keventData.DirEntries[fileSystemInfo.FullName];
if (keventFileData.LastWriteTime != fileSystemInfo.LastWriteTime)
{
text = fileSystemInfo.Name;
FileAction fa = FileAction.Modified;
keventData.DirEntries[fileSystemInfo.FullName] = new KeventFileData(fileSystemInfo, fileSystemInfo.LastAccessTime, fileSystemInfo.LastWriteTime);
if (fsw.IncludeSubdirectories && fileSystemInfo is DirectoryInfo)
{
keventData.Directory = text;
KeventWatcher.requests[ev.ident] = keventData;
this.ProcessEvent(ev);
}
this.PostEvent(text, fsw, fa, changedFsi);
}
}
}
}
catch (Exception)
{
}
try
{
bool flag = true;
while (flag)
{
foreach (object obj in keventData.DirEntries.Values)
{
KeventFileData keventFileData2 = (KeventFileData)obj;
if (!File.Exists(keventFileData2.fsi.FullName) && !Directory.Exists(keventFileData2.fsi.FullName))
{
text = keventFileData2.fsi.Name;
FileAction fa = FileAction.Removed;
keventData.DirEntries.Remove(keventFileData2.fsi.FullName);
this.PostEvent(text, fsw, fa, changedFsi);
break;
}
}
flag = false;
}
}
catch (Exception)
{
}
try
{
foreach (FileSystemInfo fileSystemInfo2 in directoryInfo.GetFileSystemInfos())
{
if (!keventData.DirEntries.ContainsKey(fileSystemInfo2.FullName))
{
changedFsi = fileSystemInfo2;
text = fileSystemInfo2.Name;
FileAction fa = FileAction.Added;
keventData.DirEntries[fileSystemInfo2.FullName] = new KeventFileData(fileSystemInfo2, fileSystemInfo2.LastAccessTime, fileSystemInfo2.LastWriteTime);
this.PostEvent(text, fsw, fa, changedFsi);
}
}
}
catch (Exception)
{
}
}
}
}
void ProcessEvent(kevent ev)
{
lock (this)
{
KeventData data = (KeventData)requests [ev.ident];
if (!data.Enabled)
{
return;
}
FileSystemWatcher fsw;
string filename = "";
fsw = data.FSW;
FileAction fa = 0;
DirectoryInfo dir = new DirectoryInfo(data.Directory);
FileSystemInfo changedFsi = null;
try
{
foreach (FileSystemInfo fsi in dir.GetFileSystemInfos())
{
if (data.DirEntries.ContainsKey(fsi.FullName) && (fsi is FileInfo))
{
KeventFileData entry = (KeventFileData)data.DirEntries [fsi.FullName];
if (entry.LastWriteTime != fsi.LastWriteTime)
{
filename = fsi.Name;
fa = FileAction.Modified;
data.DirEntries [fsi.FullName] = new KeventFileData(fsi, fsi.LastAccessTime, fsi.LastWriteTime);
if (fsw.IncludeSubdirectories && fsi is DirectoryInfo)
{
data.Directory = filename;
requests [ev.ident] = data;
ProcessEvent(ev);
}
PostEvent(filename, fsw, fa, changedFsi);
}
}
}
}
catch (Exception)
{
// The file system infos were changed while we processed them
}
// Deleted
try
{
bool deleteMatched = true;
while (deleteMatched)
{
foreach (KeventFileData entry in data.DirEntries.Values)
{
if (!File.Exists(entry.fsi.FullName) && !Directory.Exists(entry.fsi.FullName))
{
filename = entry.fsi.Name;
fa = FileAction.Removed;
data.DirEntries.Remove(entry.fsi.FullName);
PostEvent(filename, fsw, fa, changedFsi);
break;
}
}
deleteMatched = false;
}
}
catch (Exception)
{
// The file system infos were changed while we processed them
}
// Added
try
{
foreach (FileSystemInfo fsi in dir.GetFileSystemInfos())
{
if (!data.DirEntries.ContainsKey(fsi.FullName))
{
changedFsi = fsi;
filename = fsi.Name;
fa = FileAction.Added;
data.DirEntries [fsi.FullName] = new KeventFileData(fsi, fsi.LastAccessTime, fsi.LastWriteTime);
PostEvent(filename, fsw, fa, changedFsi);
}
}
}
catch (Exception)
{
// The file system infos were changed while we processed them
}
}
}
extern static int kevent(int kqueue, ref kevent ev, int nchanges, ref kevent evtlist, int nevents, ref timespec ts);
void Monitor ()
{
while (!stop) {
kevent ev = new kevent();
ev.udata = IntPtr.Zero;
kevent nullev = new kevent();
nullev.udata = IntPtr.Zero;
timespec ts = new timespec();
ts.tv_sec = 0;
ts.tv_usec = 0;
int haveEvents;
lock (this) {
haveEvents = kevent (conn, ref nullev, 0, ref ev, 1, ref ts);
}
if (haveEvents > 0) {
// Restart monitoring
KeventData data = (KeventData) requests [ev.ident];
StopMonitoringDirectory (data);
StartMonitoringDirectory (data);
ProcessEvent (ev);
} else {
System.Threading.Thread.Sleep (500);
}
}
lock (this) {
thread = null;
stop = false;
}
}
static void StartMonitoringDirectory (KeventData data)
{
DirectoryInfo dir = new DirectoryInfo (data.Directory);
if(data.DirEntries == null) {
data.DirEntries = new Hashtable();
foreach (FileSystemInfo fsi in dir.GetFileSystemInfos() )
data.DirEntries.Add(fsi.FullName, new KeventFileData(fsi, fsi.LastAccessTime, fsi.LastWriteTime));
}
int fd = open(data.Directory, 0, 0);
kevent ev = new kevent();
ev.udata = IntPtr.Zero;
timespec nullts = new timespec();
nullts.tv_sec = 0;
nullts.tv_usec = 0;
if (fd > 0) {
ev.ident = fd;
ev.filter = EventFilter.Vnode;
ev.flags = EventFlags.Add | EventFlags.Enable | EventFlags.OneShot;
ev.fflags = // 20 | 2 | 1 | 8;
FilterFlags.VNodeDelete |
FilterFlags.VNodeWrite |
FilterFlags.VNodeAttrib |
// The following two values are the equivalent of the original value "20", but we suspect the original author meant
// 0x20, we will review later with some test cases
FilterFlags.VNodeLink |
FilterFlags.VNodeExtend;
ev.data = 0;
ev.udata = Marshal.StringToHGlobalAuto (data.Directory);
kevent outev = new kevent();
outev.udata = IntPtr.Zero;
kevent (conn, ref ev, 1, ref outev, 0, ref nullts);
data.ev = ev;
requests [fd] = data;
}
if (!data.IncludeSubdirs)
return;
}
static int kevent(int kqueue, ref kevent ev, int nchanges, ref kevent evtlist, int nevents, ref timespec ts)
{
throw new System.NotImplementedException();
}
private void ProcessEvent(kevent ev)
{
lock (this)
{
KeventData keventData = (KeventData)requests[ev.ident];
if (keventData.Enabled)
{
string empty = string.Empty;
FileSystemWatcher fSW = keventData.FSW;
FileAction fileAction = (FileAction)0;
DirectoryInfo directoryInfo = new DirectoryInfo(keventData.Directory);
FileSystemInfo changedFsi = null;
try
{
FileSystemInfo[] fileSystemInfos = directoryInfo.GetFileSystemInfos();
foreach (FileSystemInfo fileSystemInfo in fileSystemInfos)
{
if (keventData.DirEntries.ContainsKey(fileSystemInfo.FullName) && fileSystemInfo is FileInfo)
{
KeventFileData keventFileData = (KeventFileData)keventData.DirEntries[fileSystemInfo.FullName];
if (keventFileData.LastWriteTime != fileSystemInfo.LastWriteTime)
{
empty = fileSystemInfo.Name;
fileAction = FileAction.Modified;
keventData.DirEntries[fileSystemInfo.FullName] = new KeventFileData(fileSystemInfo, fileSystemInfo.LastAccessTime, fileSystemInfo.LastWriteTime);
if (fSW.IncludeSubdirectories && fileSystemInfo is DirectoryInfo)
{
keventData.Directory = empty;
requests[ev.ident] = keventData;
ProcessEvent(ev);
}
PostEvent(empty, fSW, fileAction, changedFsi);
}
}
}
}
catch (Exception)
{
}
try
{
bool flag = true;
while (flag)
{
foreach (KeventFileData value in keventData.DirEntries.Values)
{
if (!File.Exists(value.fsi.FullName) && !Directory.Exists(value.fsi.FullName))
{
empty = value.fsi.Name;
fileAction = FileAction.Removed;
keventData.DirEntries.Remove(value.fsi.FullName);
PostEvent(empty, fSW, fileAction, changedFsi);
break;
}
}
flag = false;
}
}
catch (Exception)
{
}
try
{
FileSystemInfo[] fileSystemInfos2 = directoryInfo.GetFileSystemInfos();
foreach (FileSystemInfo fileSystemInfo2 in fileSystemInfos2)
{
if (!keventData.DirEntries.ContainsKey(fileSystemInfo2.FullName))
{
changedFsi = fileSystemInfo2;
empty = fileSystemInfo2.Name;
fileAction = FileAction.Added;
keventData.DirEntries[fileSystemInfo2.FullName] = new KeventFileData(fileSystemInfo2, fileSystemInfo2.LastAccessTime, fileSystemInfo2.LastWriteTime);
PostEvent(empty, fSW, fileAction, changedFsi);
}
}
}
catch (Exception)
{
}
}
}
}
void ProcessEvent (kevent ev)
{
lock (this) {
KeventData data = (KeventData) requests [ev.ident];
if (!data.Enabled)
return;
FileSystemWatcher fsw;
string filename = "";
fsw = data.FSW;
FileAction fa = 0;
DirectoryInfo dir = new DirectoryInfo (data.Directory);
FileSystemInfo changedFsi = null;
try {
foreach (FileSystemInfo fsi in dir.GetFileSystemInfos() )
if (data.DirEntries.ContainsKey (fsi.FullName) && (fsi is FileInfo)) {
KeventFileData entry = (KeventFileData) data.DirEntries [fsi.FullName];
if (entry.LastWriteTime != fsi.LastWriteTime) {
filename = fsi.Name;
fa = FileAction.Modified;
data.DirEntries [fsi.FullName] = new KeventFileData(fsi, fsi.LastAccessTime, fsi.LastWriteTime);
if (fsw.IncludeSubdirectories && fsi is DirectoryInfo) {
data.Directory = filename;
requests [ev.ident] = data;
ProcessEvent(ev);
}
PostEvent(filename, fsw, fa, changedFsi);
}
}
} catch (Exception) {
// The file system infos were changed while we processed them
}
// Deleted
try {
bool deleteMatched = true;
while(deleteMatched) {
foreach (KeventFileData entry in data.DirEntries.Values) {
if (!File.Exists (entry.fsi.FullName) && !Directory.Exists (entry.fsi.FullName)) {
filename = entry.fsi.Name;
fa = FileAction.Removed;
data.DirEntries.Remove (entry.fsi.FullName);
PostEvent(filename, fsw, fa, changedFsi);
break;
}
}
deleteMatched = false;
}
} catch (Exception) {
// The file system infos were changed while we processed them
}
// Added
try {
foreach (FileSystemInfo fsi in dir.GetFileSystemInfos())
if (!data.DirEntries.ContainsKey (fsi.FullName)) {
changedFsi = fsi;
filename = fsi.Name;
fa = FileAction.Added;
data.DirEntries [fsi.FullName] = new KeventFileData(fsi, fsi.LastAccessTime, fsi.LastWriteTime);
PostEvent(filename, fsw, fa, changedFsi);
}
} catch (Exception) {
// The file system infos were changed while we processed them
}
}
}
void Monitor()
{
var eventBuffer = new kevent[32];
var newFds = new List <int> ();
List <PathData> removeQueue = new List <PathData> ();
List <string> rescanQueue = new List <string> ();
int retries = 0;
while (!requestStop)
{
var changes = CreateChangeList(ref newFds);
// We are calling an icall, so have to marshal manually
// Marshal in
int ksize = Marshal.SizeOf <kevent> ();
var changesNative = Marshal.AllocHGlobal(ksize * changes.Length);
for (int i = 0; i < changes.Length; ++i)
{
Marshal.StructureToPtr(changes [i], changesNative + (i * ksize), false);
}
var eventBufferNative = Marshal.AllocHGlobal(ksize * eventBuffer.Length);
int numEvents = kevent_notimeout(ref conn, changesNative, changes.Length, eventBufferNative, eventBuffer.Length);
// Marshal out
Marshal.FreeHGlobal(changesNative);
for (int i = 0; i < numEvents; ++i)
{
eventBuffer [i] = Marshal.PtrToStructure <kevent> (eventBufferNative + (i * ksize));
}
Marshal.FreeHGlobal(eventBufferNative);
if (numEvents == -1)
{
// Stop () signals us to stop by closing the connection
if (requestStop)
{
break;
}
int errno = Marshal.GetLastWin32Error();
if (errno != EINTR && ++retries == 3)
{
throw new IOException(String.Format(
"persistent kevent() error, error code = '{0}'", errno));
}
continue;
}
retries = 0;
for (var i = 0; i < numEvents; i++)
{
var kevt = eventBuffer [i];
if (!fdsDict.ContainsKey((int)kevt.ident))
{
// The event is for a file that was removed
continue;
}
var pathData = fdsDict [(int)kevt.ident];
if ((kevt.flags & EventFlags.Error) == EventFlags.Error)
{
var errMsg = String.Format("kevent() error watching path '{0}', error code = '{1}'", pathData.Path, kevt.data);
fsw.DispatchErrorEvents(new ErrorEventArgs(new IOException(errMsg)));
continue;
}
if ((kevt.fflags & FilterFlags.VNodeDelete) == FilterFlags.VNodeDelete || (kevt.fflags & FilterFlags.VNodeRevoke) == FilterFlags.VNodeRevoke)
{
if (pathData.Path == fullPathNoLastSlash)
{
// The root path is deleted; exit silently
return;
}
removeQueue.Add(pathData);
continue;
}
if ((kevt.fflags & FilterFlags.VNodeRename) == FilterFlags.VNodeRename)
{
UpdatePath(pathData);
}
if ((kevt.fflags & FilterFlags.VNodeWrite) == FilterFlags.VNodeWrite)
{
if (pathData.IsDirectory) //TODO: Check if dirs trigger Changed events on .NET
{
rescanQueue.Add(pathData.Path);
}
else
{
PostEvent(FileAction.Modified, pathData.Path);
}
}
if ((kevt.fflags & FilterFlags.VNodeAttrib) == FilterFlags.VNodeAttrib || (kevt.fflags & FilterFlags.VNodeExtend) == FilterFlags.VNodeExtend)
{
PostEvent(FileAction.Modified, pathData.Path);
}
}
removeQueue.ForEach(Remove);
removeQueue.Clear();
rescanQueue.ForEach(path => {
Scan(path, true, ref newFds);
});
rescanQueue.Clear();
}
}
void Setup ()
{
var initialFds = new List<int> ();
// fsw.FullPath may end in '/', see https://bugzilla.xamarin.com/show_bug.cgi?id=5747
if (fsw.FullPath != "/" && fsw.FullPath.EndsWith ("/", StringComparison.Ordinal))
fullPathNoLastSlash = fsw.FullPath.Substring (0, fsw.FullPath.Length - 1);
else
fullPathNoLastSlash = fsw.FullPath;
// realpath() returns the *realpath* which can be different than fsw.FullPath because symlinks.
// If so, introduce a fixup step.
var sb = new StringBuilder (__DARWIN_MAXPATHLEN);
if (realpath(fsw.FullPath, sb) == IntPtr.Zero) {
var errMsg = String.Format ("realpath({0}) failed, error code = '{1}'", fsw.FullPath, Marshal.GetLastWin32Error ());
throw new IOException (errMsg);
}
var resolvedFullPath = sb.ToString();
if (resolvedFullPath != fullPathNoLastSlash)
fixupPath = resolvedFullPath;
else
fixupPath = null;
Scan (fullPathNoLastSlash, false, ref initialFds);
var immediate_timeout = new timespec { tv_sec = (IntPtr)0, tv_nsec = (IntPtr)0 };
var eventBuffer = new kevent[0]; // we don't want to take any events from the queue at this point
var changes = CreateChangeList (ref initialFds);
int numEvents;
int errno = 0;
do {
numEvents = kevent (conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref immediate_timeout);
if (numEvents == -1) {
errno = Marshal.GetLastWin32Error ();
}
} while (numEvents == -1 && errno == EINTR);
if (numEvents == -1) {
var errMsg = String.Format ("kevent() error at initial event registration, error code = '{0}'", errno);
throw new IOException (errMsg);
}
}
void Setup ()
{
var initialFds = new List<int> ();
// GetFilenameFromFd() returns the *realpath* which can be different than fsw.FullPath because symlinks.
// If so, introduce a fixup step.
int fd = open (fsw.FullPath, O_EVTONLY, 0);
var resolvedFullPath = GetFilenameFromFd (fd);
close (fd);
if (resolvedFullPath != fsw.FullPath)
fixupPath = resolvedFullPath;
else
fixupPath = null;
Scan (fsw.FullPath, false, ref initialFds);
var immediate_timeout = new timespec { tv_sec = (IntPtr)0, tv_usec = (IntPtr)0 };
var eventBuffer = new kevent[0]; // we don't want to take any events from the queue at this point
var changes = CreateChangeList (ref initialFds);
int numEvents = kevent (conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref immediate_timeout);
if (numEvents == -1) {
var errMsg = String.Format ("kevent() error at initial event registration, error code = '{0}'", Marshal.GetLastWin32Error ());
throw new IOException (errMsg);
}
}
extern static int kevent(int kqueue, ref kevent ev, int nchanges, ref kevent evtlist, int nevents, ref timespec ts);
void Monitor ()
{
var timeout = new timespec { tv_sec = (IntPtr)0, tv_usec = (IntPtr)500000000 };
var eventBuffer = new kevent[32];
var newFds = new List<int> ();
List<PathData> removeQueue = new List<PathData> ();
List<string> rescanQueue = new List<string> ();
while (!requestStop) {
var changes = CreateChangeList (ref newFds);
int numEvents = kevent (conn, changes, changes.Length, eventBuffer, eventBuffer.Length, ref timeout);
if (numEvents == -1) {
var errMsg = String.Format ("kevent() error, error code = '{0}'", Marshal.GetLastWin32Error ());
fsw.OnError (new ErrorEventArgs (new IOException (errMsg)));
}
if (numEvents == 0)
continue;
for (var i = 0; i < numEvents; i++) {
var kevt = eventBuffer [i];
var pathData = fdsDict [(int)kevt.ident];
if ((kevt.flags & EventFlags.Error) == EventFlags.Error) {
var errMsg = String.Format ("kevent() error watching path '{0}', error code = '{1}'", pathData.Path, kevt.data);
fsw.OnError (new ErrorEventArgs (new IOException (errMsg)));
continue;
}
if ((kevt.fflags & FilterFlags.VNodeDelete) == FilterFlags.VNodeDelete || (kevt.fflags & FilterFlags.VNodeRevoke) == FilterFlags.VNodeRevoke)
removeQueue.Add (pathData);
else if ((kevt.fflags & FilterFlags.VNodeWrite) == FilterFlags.VNodeWrite) {
if (pathData.IsDirectory)
rescanQueue.Add (pathData.Path);
else
PostEvent (FileAction.Modified, pathData.Path);
}
else if ((kevt.fflags & FilterFlags.VNodeRename) == FilterFlags.VNodeRename) {
var newFilename = GetFilenameFromFd (pathData.Fd);
if (newFilename.StartsWith (fsw.FullPath))
Rename (pathData, newFilename);
else //moved outside of our watched dir so stop watching
RemoveTree (pathData);
}
else if ((kevt.fflags & FilterFlags.VNodeAttrib) == FilterFlags.VNodeAttrib || (kevt.fflags & FilterFlags.VNodeExtend) == FilterFlags.VNodeExtend)
PostEvent (FileAction.Modified, pathData.Path);
}
removeQueue.ForEach (Remove);
removeQueue.Clear ();
rescanQueue.ForEach (path => {
Scan (path, true, ref newFds);
});
rescanQueue.Clear ();
}
}
void Monitor()
{
var eventBuffer = new kevent[32];
var newFds = new List <int> ();
List <PathData> removeQueue = new List <PathData> ();
List <string> rescanQueue = new List <string> ();
int retries = 0;
while (!requestStop)
{
var changes = CreateChangeList(ref newFds);
int numEvents = kevent_notimeout(conn, changes, changes.Length, eventBuffer, eventBuffer.Length, IntPtr.Zero);
if (numEvents == -1)
{
// Stop () signals us to stop by closing the connection
if (requestStop)
{
break;
}
if (++retries == 3)
{
throw new IOException(String.Format(
"persistent kevent() error, error code = '{0}'", Marshal.GetLastWin32Error()));
}
continue;
}
retries = 0;
for (var i = 0; i < numEvents; i++)
{
var kevt = eventBuffer [i];
if (!fdsDict.ContainsKey((int)kevt.ident))
{
// The event is for a file that was removed
continue;
}
var pathData = fdsDict [(int)kevt.ident];
if ((kevt.flags & EventFlags.Error) == EventFlags.Error)
{
var errMsg = String.Format("kevent() error watching path '{0}', error code = '{1}'", pathData.Path, kevt.data);
fsw.DispatchErrorEvents(new ErrorEventArgs(new IOException(errMsg)));
continue;
}
if ((kevt.fflags & FilterFlags.VNodeDelete) == FilterFlags.VNodeDelete || (kevt.fflags & FilterFlags.VNodeRevoke) == FilterFlags.VNodeRevoke)
{
if (pathData.Path == fullPathNoLastSlash)
{
// The root path is deleted; exit silently
return;
}
removeQueue.Add(pathData);
continue;
}
if ((kevt.fflags & FilterFlags.VNodeRename) == FilterFlags.VNodeRename)
{
UpdatePath(pathData);
}
if ((kevt.fflags & FilterFlags.VNodeWrite) == FilterFlags.VNodeWrite)
{
if (pathData.IsDirectory) //TODO: Check if dirs trigger Changed events on .NET
{
rescanQueue.Add(pathData.Path);
}
else
{
PostEvent(FileAction.Modified, pathData.Path);
}
}
if ((kevt.fflags & FilterFlags.VNodeAttrib) == FilterFlags.VNodeAttrib || (kevt.fflags & FilterFlags.VNodeExtend) == FilterFlags.VNodeExtend)
{
PostEvent(FileAction.Modified, pathData.Path);
}
}
removeQueue.ForEach(Remove);
removeQueue.Clear();
rescanQueue.ForEach(path => {
Scan(path, true, ref newFds);
});
rescanQueue.Clear();
}
}
static int kevent(int kqueue, ref kevent ev, int nchanges, ref kevent evtlist, int nevents, ref timespec ts)
{
throw new System.NotImplementedException();
}