From b88037b6bf6a6c812183566d96887cb0b201491b Mon Sep 17 00:00:00 2001 From: John Crispin Date: Thu, 12 Jul 2018 10:05:17 +0200 Subject: [PATCH] check timegm return code Signed-off-by: John Crispin --- nmea.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/nmea.c b/nmea.c index 4a49528..7793097 100644 --- a/nmea.c +++ b/nmea.c @@ -97,12 +97,14 @@ nmea_rmc_cb(void) DEBUG(3, "date: %s UTC\n", tmp); if (adjust_clock) { - struct timeval tv = { timegm(&tm), 0 }; + time_t sec = timegm(&tm); + struct timeval tv = { 0 }; struct timeval cur; gettimeofday(&cur, NULL); - if (abs(cur.tv_sec - tv.tv_sec) > MAX_TIME_OFFSET) { + if ((sec < 0) || (abs(cur.tv_sec - tv.tv_sec) > MAX_TIME_OFFSET)) { + tv.tv_sec = sec; if (++nmea_bad_time > MAX_BAD_TIME) { LOG("system time differs from GPS time by more than %d seconds. Using %s UTC as the new time\n", MAX_TIME_OFFSET, tmp); /* only set datetime if specified by command line argument! */ -- 2.30.2