doc: document fs 'rs+' open mode

nodejs · May 17, 2012 · ccc4e54 · ccc4e54
1 parent 1a2255a
commit ccc4e54
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/doc/api/fs.markdown b/doc/api/fs.markdown
@@ -277,6 +277,10 @@ this doesn't turn `fs.open()` into a synchronous blocking call, if that's what
 you want then you should be using `fs.openSync()`
 An exception occurs if the file does not exist.
 
+* `'rs+'` - Open file for reading and writing, telling the OS to open it
+synchronously.
+See notes for `'rs'` about using this with caution.
+
 * `'w'` - Open file for writing.
 The file is created (if it does not exist) or truncated (if it exists).