From 7372d0277c003ecb7468e5dd393bdb4b5a63aa89 Mon Sep 17 00:00:00 2001
From: "Hui, Chunyang" <sanqian.hcy@antfin.com>
Date: Mon, 13 Apr 2020 04:25:25 +0000
Subject: [PATCH] Fix tty ioctl test for non-tty stdout

---
 test/ioctl/main.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/test/ioctl/main.c b/test/ioctl/main.c
index 2d980f7a..16beb834 100644
--- a/test/ioctl/main.c
+++ b/test/ioctl/main.c
@@ -17,8 +17,14 @@
 
 int test_tty_ioctl_TIOCGWINSZ(void) {
     struct winsize winsize;
-    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) < 0) {
-        THROW_ERROR("failed to ioctl TIOCGWINSZ");
+    if (isatty(STDOUT_FILENO)) {
+        if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) < 0) {
+            THROW_ERROR("failed to ioctl TIOCGWINSZ");
+        }
+    } else {
+        // FIXME: /dev/tty should be opened. But it has not been implemented in Occlum yet.
+        // So we just skip this test if STDOUT is redirected.
+        printf("Warning: test_tty_ioctl_TIOCGWINSZ is skipped\n");
     }
     return 0;
 }