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authorKieran Bingham <kieran.bingham@ideasonboard.com>2020-09-17 15:04:49 +0100
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2022-02-28 13:12:36 +0200
commit56d5364fced642aa203bd74b9d92798985d3ca5c (patch)
treef966ed80edf43004772d215bd3833cbee63da958 /src/monotonic-ts.c
parentd797d5cc5fef90a9fc913b81087308815a126ce5 (diff)
src: monotonic-ts: Monotonic timestamp logging
Introduce a new utility which prefixes a monotonic timestamp rendered in the same format as the kernel logs to all lines fed in through stdin. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/monotonic-ts.c')
-rw-r--r--src/monotonic-ts.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/src/monotonic-ts.c b/src/monotonic-ts.c
new file mode 100644
index 0000000..69a1809
--- /dev/null
+++ b/src/monotonic-ts.c
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* SPDX-FileCopyrightText: 2020 Kieran Bingham <kieran.bingham@ideasonboard.com> */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int main(int argc, char ** argv)
+{
+ struct timespec tp;
+ char *line = NULL;
+ size_t size = 0;
+ const char *label = "";
+
+ if (argc > 1)
+ label = argv[1];
+
+ /*
+ * Explicitly set line buffering on stdin to be sure it is delivered
+ * in a timely fashion for our timestamping purposes when data is fed
+ * through a pipe.
+ */
+ setlinebuf(stdin);
+
+ do {
+ if (getline(&line, &size, stdin) <= 0)
+ break;
+
+ clock_gettime(CLOCK_MONOTONIC, &tp);
+ printf("[%ld.%.9ld]%s %s", tp.tv_sec, tp.tv_nsec, label, line);
+ } while (!feof(stdin));
+
+ free(line);
+
+ return 0;
+}