Added FileSystem tracking Support.

1 files changed, 24 insertions, 1 deletions

diff --git a/src/library_fs.js b/src/library_fs.js
index d53210f9..e7e194cf 100644
--- a/src/library_fs.js
+++ b/src/library_fs.js
@@ -26,7 +26,13 @@ mergeInto(LibraryManager.library, {
     // This is set to false when the runtime is initialized, allowing you
     // to modify the filesystem freely before run() is called.
     ignorePermissions: true,
-    
+    trackingDelegate: {},
+    tracking: {
+      openFlags: {
+        READ: 1 << 0,
+        WRITE: 1 << 1
+      }
+    },
     ErrnoError: null, // set during init
     genericErrors: {},
 
@@ -725,6 +731,12 @@ mergeInto(LibraryManager.library, {
         // changed its name)
         FS.hashAddNode(old_node);
       }
+      if (FS.trackingDelegate) {
+        if (FS.trackingDelegate['didDeleteFile'])
+          FS.trackingDelegate['didDeleteFile'](old_path);
+        if (FS.trackingDelegate['didOpenFile'])
+          FS.trackingDelegate['didOpenFile'](new_path, FS.tracking.openFlags.WRITE);
+      }
     },
     rmdir: function(path) {
       var lookup = FS.lookupPath(path, { parent: true });
@@ -771,6 +783,9 @@ mergeInto(LibraryManager.library, {
       }
       parent.node_ops.unlink(parent, name);
       FS.destroyNode(node);
+      if (FS.trackingDelegate && FS.trackingDelegate['didDeleteFile']) {
+        FS.trackingDelegate['didDeleteFile'](path);
+      }
     },
     readlink: function(path) {
       var lookup = FS.lookupPath(path);
@@ -965,6 +980,14 @@ mergeInto(LibraryManager.library, {
           Module['printErr']('read file: ' + path);
         }
       }
+      if (FS.trackingDelegate && FS.trackingDelegate['didOpenFile']) {
+        var trackingFlags = 0;
+        if (!(flags & {{{ cDefine('O_WRONLY')}}}))
+          trackingFlags != FS.tracking.openFlags.READ;
+        if (!(flags & {{{ cDefine('O_RDONLY')}}}))
+          trackingFlags != FS.tracking.openFlags.WRITE;
+        FS.trackingDelegate['didOpenFile'](path, trackingFlags);
+      }
       return stream;
     },
     close: function(stream) {