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-rw-r--r--winsup/cygwin/fhandler_tty.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc
index 3d5a567df..a644c0f78 100644
--- a/winsup/cygwin/fhandler_tty.cc
+++ b/winsup/cygwin/fhandler_tty.cc
@@ -1051,7 +1051,7 @@ fhandler_tty_slave::tcflush (int queue)
{
size_t len = UINT_MAX;
read (NULL, len);
- ret = ((int) len) >= 0;
+ ret = ((int) len) >= 0 ? 0 : -1;
}
if (queue == TCOFLUSH || queue == TCIOFLUSH)
{