[v4l-utils] v4l2-compliance: flush stdout before calling fork()

Commit Message

Guillaume Tucker Nov. 1, 2018, 5:46 p.m. UTC

In order to avoid corrupt log output, flush stdout before calling
fork() when running streaming tests.  This is to prevent any remaining
characters in the stdout buffer from being output both in the parent
and child process.

Signed-off-by: Guillaume Tucker <[e-mail]>
---
 utils/v4l2-compliance/v4l2-test-buffers.cpp | 2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/utils/v4l2-compliance/v4l2-test-buffers.cpp b/utils/v4l2-compliance/v4l2-test-buffers.cpp
index 6864f924daec..ee05739a2f73 100644
--- a/utils/v4l2-compliance/v4l2-test-buffers.cpp
+++ b/utils/v4l2-compliance/v4l2-test-buffers.cpp
@@ -1204,6 +1204,7 @@  static int testBlockingDQBuf(struct node *node, cv4l_queue &q)
 	 * This test checks if a blocking wait in VIDIOC_DQBUF doesn't block
 	 * other ioctls.
 	 */
+	fflush(stdout);
 	pid_dqbuf = fork();
 	fail_on_test(pid_dqbuf == -1);
 
@@ -1224,6 +1225,7 @@  static int testBlockingDQBuf(struct node *node, cv4l_queue &q)
 	/* Check that it is really blocking */
 	fail_on_test(pid);
 
+	fflush(stdout);
 	pid_streamoff = fork();
 	fail_on_test(pid_streamoff == -1);