From d425b524f5ce06e6d9cbb6838c4bf8b66b73ee06 Mon Sep 17 00:00:00 2001
From: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Sun, 5 Jul 2020 15:53:37 +0200
Subject: sfeed_atom: the updated field is mandatory: use the current time...

... if it is missing/invalid.
---
 sfeed_atom.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/sfeed_atom.c b/sfeed_atom.c
index c5ea737..0463ef7 100644
--- a/sfeed_atom.c
+++ b/sfeed_atom.c
@@ -7,6 +7,7 @@
 
 #include "util.h"
 
+static struct tm tmnow;
 static time_t now;
 static char *line;
 static size_t linesize;
@@ -38,7 +39,7 @@ static void
 printfeed(FILE *fp, const char *feedname)
 {
 	char *fields[FieldLast];
-	struct tm *tm;
+	struct tm tmitem, *tm;
 	time_t parsedtime;
 	ssize_t linelen;
 
@@ -74,12 +75,12 @@ printfeed(FILE *fp, const char *feedname)
 		}
 
 		parsedtime = 0;
-		if (!strtotime(fields[FieldUnixTimestamp], &parsedtime) &&
-		    (tm = gmtime(&parsedtime))) {
-			fprintf(stdout, "\t<updated>%04d-%02d-%02dT%02d:%02d:%02dZ</updated>\n",
-			        tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
-			        tm->tm_hour, tm->tm_min, tm->tm_sec);
-		}
+		if (strtotime(fields[FieldUnixTimestamp], &parsedtime) ||
+		    !(tm = gmtime_r(&parsedtime, &tmitem)))
+			tm = &tmnow;
+		fprintf(stdout, "\t<updated>%04d-%02d-%02dT%02d:%02d:%02dZ</updated>\n",
+		        tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
+		        tm->tm_hour, tm->tm_min, tm->tm_sec);
 
 		if (fields[FieldAuthor][0]) {
 			fputs("\t<author><name>", stdout);
@@ -120,8 +121,8 @@ main(int argc, char *argv[])
 
 	if ((now = time(NULL)) == -1)
 		err(1, "time");
-	if (!(tm = gmtime(&now)))
-		err(1, "gmtime");
+	if (!(tm = gmtime_r(&now, &tmnow)))
+		err(1, "gmtime_r");
 
 	fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 	      "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n"
-- 
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