diff options
Diffstat (limited to 'winsup/cygwin/fhandler.cc')
| -rw-r--r-- | winsup/cygwin/fhandler.cc | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc index abeef9e55..811b03888 100644 --- a/winsup/cygwin/fhandler.cc +++ b/winsup/cygwin/fhandler.cc @@ -1021,12 +1021,17 @@ int fhandler_base::fcntl (int cmd, void *arg) * Each other flag will be ignored. * Since O_ASYNC isn't defined in fcntl.h it's currently * ignored as well. - * There's no functionality at all, so... */ const int allowed_flags = O_APPEND | O_NONBLOCK | OLD_O_NDELAY; + /* Care for the old O_NDELAY flag. If one of the flags is set, + both flags are set. */ + int new_flags = (int) arg; + if (new_flags & (O_NONBLOCK | OLD_O_NDELAY)) + new_flags |= O_NONBLOCK | OLD_O_NDELAY; + int flags = get_flags () & ~allowed_flags; - set_flags (flags | ((int)arg & allowed_flags)); + set_flags (flags | (new_flags & allowed_flags)); } res = 0; break; |