X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Ftime.c;h=885f58cb175bf4a2336cf957047abcc339642c15;hp=a01c16df5c44f024c00469beeaa014542c658c9f;hb=274ca939e0a5baa74d4ff61518ed0af7b0da5465;hpb=fd774fc6fa1c368a400976ad362e4f60f46e9861

diff --git a/src/common/time.c b/src/common/time.c
index a01c16df5..885f58cb1 100644
--- a/src/common/time.c
+++ b/src/common/time.c
@@ -17,6 +17,7 @@
 
 #include <common/time.h>
 #include <common/macros.h>
+#include <common/error.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <limits.h>
@@ -80,3 +81,35 @@ void __attribute__((constructor)) init_locale_utf8_support(void)
 		utf8_output_supported = true;
 	}
 }
+
+LTTNG_HIDDEN
+int time_to_iso8601_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 < ISO8601_STR_LEN) {
+		ERR("Buffer too short to format ISO 8601 timestamp: %zu bytes provided when at least %zu are needed",
+				len, ISO8601_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%dT%H%M%S%z", tm_result);
+	if (strf_ret == 0) {
+		ret = -1;
+		ERR("Failed to format timestamp as local time");
+		goto end;
+	}
+end:
+	return ret;
+}