From 7dc64226aa8baf221f1d69f8187aae29b862b8f2 Mon Sep 17 00:00:00 2001
From: Christopher Wellons <wellons@nullprogram.com>
Date: Sun, 3 Feb 2019 16:01:24 -0500
Subject: [PATCH] Use RFC3339 dates in the log

---
 endlessh.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/endlessh.c b/endlessh.c
index 8bf0b06..1c5e58e 100644
--- a/endlessh.c
+++ b/endlessh.c
@@ -47,8 +47,15 @@ static void
 logmsg(enum loglevel level, const char *format, ...)
 {
     if (loglevel >= level) {
+        /* Print a timestamp */
         long long now = uepoch();
-        printf("%lld.%03lld: ", now / 1000, now % 1000);
+        time_t t = now / 1000;
+        char date[64];
+        struct tm tm[1];
+        strftime(date, sizeof(date), "%Y-%m-%dT%H:%M:%S", gmtime_r(&t, tm));
+        printf("%s.%03lldZ ", date, now % 1000);
+
+        /* Print the rest of the log message */
         va_list ap;
         va_start(ap, format);
         vprintf(format, ap);