relayd: introduce --group-output-by-session

[lttng-tools.git] / src / common / time.c

diff --git a/src/common/time.c b/src/common/time.c
index c69002f3456c33de8ea6ff33fef7610d5745d3b2..d2d2503d9f42962e5a83371b22309ef19c13001a 100644 (file)
--- a/src/common/time.c
+++ b/src/common/time.c
@@ -114,3 +114,35 @@ int time_to_iso8601_str(time_t time, char *str, size_t len)
 end:
        return ret;
 }
+
+LTTNG_HIDDEN
+int time_to_datetime_str(time_t time, char *str, size_t len)
+{
+       int ret = 0;
+       struct tm *tm_result;
+       struct tm tm_storage;
+       size_t strf_ret;
+
+       if (len < DATETIME_STR_LEN) {
+               ERR("Buffer too short to format to datetime: %zu bytes provided when at least %zu are needed",
+                               len, DATETIME_STR_LEN);
+               ret = -1;
+               goto end;
+       }
+
+       tm_result = localtime_r(&time, &tm_storage);
+       if (!tm_result) {
+               ret = -1;
+               PERROR("Failed to break down timestamp to tm structure");
+               goto end;
+       }
+
+       strf_ret = strftime(str, len, "%Y%m%d-%H%M%S", tm_result);
+       if (strf_ret == 0) {
+               ret = -1;
+               ERR("Failed to format timestamp as local time");
+               goto end;
+       }
+end:
+       return ret;
+}