date: preserve isdst value if date is in time_t (unix time) format

Signed-off-by: Alexey Soloviev <EXT-Alexey.Soloviev@nokia.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/coreutils/date.c b/coreutils/date.c
index c73fb5be6..6ad5f1bb6 100644
--- a/coreutils/date.c
+++ b/coreutils/date.c
@@ -282,7 +282,9 @@ int date_main(int argc UNUSED_PARAM, char **argv)
                 }
 
                 /* Correct any day of week and day of year etc. fields */
-                tm_time.tm_isdst = -1;  /* Be sure to recheck dst */
+                /* Be sure to recheck dst (but not if date is time_t format) */
+                if (date_str[0] != '@')
+                        tm_time.tm_isdst = -1;
                 ts.tv_sec = validate_tm_time(date_str, &tm_time);
 
                 maybe_set_utc(opt);