doc: mention that mode is ignored if file exists

per: nodejs#6847 Reviewed-By: James M Snell <[email protected]> PR-URL: nodejs#25591
ibmruntimes · Nov 4, 2016 · 2a26e83 · 2a26e83
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commit 2a26e83
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/doc/api/fs.markdown b/doc/api/fs.markdown
@@ -797,6 +797,9 @@ there's no file descriptor leak.  If `autoClose` is set to true (default
 behavior), on `error` or `end` the file descriptor will be closed
 automatically.
 
+`mode` sets the file mode (permission and sticky bits), but only if the
+file was created.
+
 An example to read the last 10 bytes of a file which is 100 bytes long:
 
     fs.createReadStream('sample.txt', {start: 90, end: 99});