diff options
Diffstat (limited to 'winsup/cygwin/fhandler_tty.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_tty.cc | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc index 1145bd14f..1428a064e 100644 --- a/winsup/cygwin/fhandler_tty.cc +++ b/winsup/cygwin/fhandler_tty.cc @@ -53,7 +53,11 @@ fhandler_pty_slave::get_unit () bool bytes_available (DWORD& n, HANDLE h) { - bool succeeded = PeekNamedPipe (h, NULL, 0, NULL, &n, NULL); + char buf[INP_BUFFER_SIZE]; + /* Apparently need to pass in a dummy buffer to read a real "record" from + the pipe. So buf is used and then discarded just so we can see how many + bytes will be read by the next ReadFile(). */ + bool succeeded = PeekNamedPipe (h, buf, sizeof (buf), &n, NULL, NULL); if (!succeeded) { termios_printf ("PeekNamedPipe(%p) failed, %E", h); @@ -1429,7 +1433,7 @@ fhandler_pty_master::ioctl (unsigned int cmd, void *arg) set_errno (EINVAL); return -1; } - *(int *) arg = (DWORD) n; + *(int *) arg = (int) n; } break; default: |