Address a compiler warning with the tests/uns_test.

We're comfortable ignoring a write return code, but not all compilers
are so display a comment when the write in the uns_test fails.

This addresses:

  https://bugzilla.kernel.org/show_bug.cgi?id=214143

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/uns_test.c b/tests/uns_test.c
index d8f5415..a1dbde0 100644
--- a/tests/uns_test.c
+++ b/tests/uns_test.c
@@ -153,6 +153,8 @@ int main(int argc, char **argv)
 
 bailok:
     fprintf(stderr, "exploit attempt failed\n");
-    (void) write(fds.to[1], "!", 1);
+    if (write(fds.to[1], "!", 1) != 1) {
+	perror("failed to inform child [ignored]");
+    }
     exit(0);
 }