[dpdk-stable] [PATCH v2] app/testpmd: avoid exit without terminal restore

[dapengx.yu at intel.com]

From: Dapeng Yu <dapengx.yu at intel.com>

In interactive mode, if testpmd exit by calling rte_exit without
restore terminal attributes, terminal will not echo keyboard input.

register a function with atexit() in prompt(), when exit() in
rte_exit() is called, the registered function restores terminal
attributes.

Fixes: 5a8fb55c48ab ("app/testpmd: support unidirectional configuration")
Cc: stable at dpdk.org

Signed-off-by: Dapeng Yu <dapengx.yu at intel.com>
---
 app/test-pmd/cmdline.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 89034c8b7..f7e18ba3d 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -17116,6 +17116,7 @@ cmdline_read_from_file(const char *filename)
 void
 prompt(void)
 {
+	int ret;
 	/* initialize non-constant commands */
 	cmd_set_fwd_mode_init();
 	cmd_set_fwd_retry_mode_init();
@@ -17123,15 +17124,23 @@ prompt(void)
 	testpmd_cl = cmdline_stdin_new(main_ctx, "testpmd> ");
 	if (testpmd_cl == NULL)
 		return;
+
+	ret = atexit(prompt_exit);
+	if (ret != 0)
+		printf("Cannot set exit function for cmdline\n");
+
 	cmdline_interact(testpmd_cl);
-	cmdline_stdin_exit(testpmd_cl);
+	if (ret != 0)
+		cmdline_stdin_exit(testpmd_cl);
 }
 
 void
 prompt_exit(void)
 {
-	if (testpmd_cl != NULL)
+	if (testpmd_cl != NULL) {
 		cmdline_quit(testpmd_cl);
+		cmdline_stdin_exit(testpmd_cl);
+	}
 }
 
 static void
-- 
2.27.0