lib: add nt_time_to_full_time_t()

BUG: https://bugzilla.samba.org/show_bug.cgi?id=7771

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

2 files changed, 18 insertions, 0 deletions

diff --git a/lib/util/time.c b/lib/util/time.c
index 05918a94ea5..89f9a45dd61 100644
--- a/lib/util/time.c
+++ b/lib/util/time.c
@@ -1116,3 +1116,20 @@ time_t full_timespec_to_time_t(const struct timespec *_ts)
 	}
 	return ts.tv_sec;
 }
+
+/**
+ * Like nt_time_to_unix() but supports negative time_t values.
+ *
+ * Note: this function uses the full time_t range as valid date values including
+ * (time_t)0 and -1. That means that NTTIME sentinel values of 0 and -1 which
+ * represent a "not-set" value, can't be converted to sentinel values in a
+ * time_t representation. Callers should therefor check the NTTIME value with
+ * null_nttime() before calling this function.
+ **/
+time_t nt_time_to_full_time_t(NTTIME nt)
+{
+	struct timespec ts;
+
+	ts = nt_time_to_full_timespec(nt);
+	return full_timespec_to_time_t(&ts);
+}
diff --git a/lib/util/time.h b/lib/util/time.h
index b9bd67499f6..725be9d8cec 100644
--- a/lib/util/time.h
+++ b/lib/util/time.h
@@ -344,5 +344,6 @@ struct timespec make_omit_timespec(void);
 NTTIME full_timespec_to_nt_time(const struct timespec *ts);
 struct timespec nt_time_to_full_timespec(NTTIME nt);
 time_t full_timespec_to_time_t(const struct timespec *ts);
+time_t nt_time_to_full_time_t(NTTIME nt);
 
 #endif /* _SAMBA_TIME_H_ */