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From:   Daniel Wagner <dwagner@suse.de>
To:     Clark Williams <williams@redhat.com>,
        John Kacur <jkacur@redhat.com>
Cc:     linux-rt-users@vger.kernel.org, Daniel Wagner <dwagner@suse.de>
Subject: [PATCH rt-tests v2 10/14] pip_stress: Add JSON output feature
Date:   Fri,  5 Mar 2021 08:34:56 +0100
Message-Id: <20210305073500.17926-11-dwagner@suse.de>
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Write the test results as JSON output to a file. This allows to
simplifies any parsing later on.

Signed-off-by: Daniel Wagner <dwagner@suse.de>
---
 src/pi_tests/pip_stress.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/pi_tests/pip_stress.c b/src/pi_tests/pip_stress.c
index 0831f698ff1d..f6096a2de273 100644
--- a/src/pi_tests/pip_stress.c
+++ b/src/pi_tests/pip_stress.c
@@ -67,18 +67,21 @@ struct State *statep;
 const int policy = SCHED_FIFO;
 static int prio_min;	/* Initialized for the minimum priority of policy */
 
+static char outfile[MAX_PATH];
+
 static void usage(int error)
 {
 	printf("pip_stress V %1.2f\n", VERSION);
 	printf("Usage:\n"
 	       "pip_stress <options>\n"\
-	       "-h	--help                  Show this help menu.\n"
+	       "-h	 --help            Show this help menu.\n"
+	       "         --output=FILENAME write final results into FILENAME, JSON formatted\n"
 	       );
 	exit(error);
 }
 
 enum option_values {
-	OPT_HELP=1
+	OPT_HELP=1, OPT_OUTPUT,
 };
 
 int main(int argc, char *argv[])
@@ -89,9 +92,11 @@ int main(int argc, char *argv[])
 	int res;
 	int *minimum_priority = (int*)&prio_min;
 
+	rt_init(argc, argv);
 	for (;;) {
 		struct option long_options[] = {
 			{"help",	no_argument,		NULL, OPT_HELP},
+			{"output",	required_argument,	NULL, OPT_OUTPUT },
 			{NULL,		0,			NULL, 0}
 		};
 
@@ -103,6 +108,9 @@ int main(int argc, char *argv[])
 		case 'h':
 			usage(0);
 			break;
+		case OPT_OUTPUT:
+			strncpy(outfile, optarg, strnlen(optarg, MAX_PATH-1));
+			break;
 		default:
 			usage(1);
 			break;
@@ -145,6 +153,7 @@ int main(int argc, char *argv[])
 		err_exit(err, NULL);
 	}
 
+	rt_test_start();
 	pid1 = fork();
 	if (pid1 == -1) {
 		perror("fork");
@@ -165,6 +174,9 @@ int main(int argc, char *argv[])
 		}
 	}
 
+	if (strlen(outfile) != 0)
+		rt_write_json(outfile, !statep->inversion, NULL, NULL);
+
 	if (!statep->inversion) {
 		printf("No inversion incurred\n");
 		exit(1);
-- 
2.30.1