all: Add filesystem notification support

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3986

vendor/github.com/zillode/notify/event_fen.go

@@ -0,0 +1,57 @@
+// Copyright (c) 2014-2015 The Notify Authors. All rights reserved.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+// +build solaris
+
+package notify
+
+const (
+	osSpecificCreate Event = 0x00000100 << iota
+	osSpecificRemove
+	osSpecificWrite
+	osSpecificRename
+	// internal
+	// recursive is used to distinguish recursive eventsets from non-recursive ones
+	recursive
+	// omit is used for dispatching internal events; only those events are sent
+	// for which both the event and the watchpoint has omit in theirs event sets.
+	omit
+)
+
+const (
+	// FileAccess is an event reported when monitored file/directory was accessed.
+	FileAccess = fileAccess
+	// FileModified is an event reported when monitored file/directory was modified.
+	FileModified = fileModified
+	// FileAttrib is an event reported when monitored file/directory's ATTRIB
+	// was changed.
+	FileAttrib = fileAttrib
+	// FileDelete is an event reported when monitored file/directory was deleted.
+	FileDelete = fileDelete
+	// FileRenameTo to is an event reported when monitored file/directory was renamed.
+	FileRenameTo = fileRenameTo
+	// FileRenameFrom is an event reported when monitored file/directory was renamed.
+	FileRenameFrom = fileRenameFrom
+	// FileTrunc is an event reported when monitored file/directory was truncated.
+	FileTrunc = fileTrunc
+	// FileNoFollow is an flag to indicate not to follow symbolic links.
+	FileNoFollow = fileNoFollow
+	// Unmounted is an event reported when monitored filesystem was unmounted.
+	Unmounted = unmounted
+	// MountedOver is an event reported when monitored file/directory was mounted on.
+	MountedOver = mountedOver
+)
+
+var osestr = map[Event]string{
+	FileAccess:     "notify.FileAccess",
+	FileModified:   "notify.FileModified",
+	FileAttrib:     "notify.FileAttrib",
+	FileDelete:     "notify.FileDelete",
+	FileRenameTo:   "notify.FileRenameTo",
+	FileRenameFrom: "notify.FileRenameFrom",
+	FileTrunc:      "notify.FileTrunc",
+	FileNoFollow:   "notify.FileNoFollow",
+	Unmounted:      "notify.Unmounted",
+	MountedOver:    "notify.MountedOver",
+}