From 449b965b88d5f9b85435ba6d742b37177c508404 Mon Sep 17 00:00:00 2001 From: relan Date: Mon, 4 Jul 2016 11:57:02 +0300 Subject: [PATCH] Respect daylight saving time. --- libexfat/time.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/libexfat/time.c b/libexfat/time.c index 7d2becd..93c1d67 100644 --- a/libexfat/time.c +++ b/libexfat/time.c @@ -151,8 +151,14 @@ void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time, void exfat_tzset(void) { time_t now; + struct tm* utc; tzset(); now = time(NULL); - exfat_timezone = mktime(gmtime(&now)) - now; + utc = gmtime(&now); + /* gmtime() always sets tm_isdst to 0 because daylight savings never + affect UTC. Setting tm_isdst to -1 makes mktime() to determine whether + summer time is in effect. */ + utc->tm_isdst = -1; + exfat_timezone = mktime(utc) - now; } -- 2.11.0