1 files changed, 80 insertions, 0 deletions
diff --git a/lib/isc/unix/stdtime.c b/lib/isc/unix/stdtime.c
new file mode 100644
index 0000000..989bde4
--- /dev/null
+++ b/lib/isc/unix/stdtime.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+
+/*! \file */
+
+#include <config.h>
+
+#include <stdbool.h>
+#include <stddef.h>	/* NULL */
+#include <stdlib.h>	/* NULL */
+#include <syslog.h>
+
+#include <sys/time.h>
+
+#include <isc/stdtime.h>
+#include <isc/util.h>
+
+#ifndef ISC_FIX_TV_USEC
+#define ISC_FIX_TV_USEC 1
+#endif
+
+#define US_PER_S 1000000
+
+#if ISC_FIX_TV_USEC
+static inline void
+fix_tv_usec(struct timeval *tv) {
+	bool fixed = false;
+
+	if (tv->tv_usec < 0) {
+		fixed = true;
+		do {
+			tv->tv_sec -= 1;
+			tv->tv_usec += US_PER_S;
+		} while (tv->tv_usec < 0);
+	} else if (tv->tv_usec >= US_PER_S) {
+		fixed = true;
+		do {
+			tv->tv_sec += 1;
+			tv->tv_usec -= US_PER_S;
+		} while (tv->tv_usec >=US_PER_S);
+	}
+	/*
+	 * Call syslog directly as we are called from the logging functions.
+	 */
+	if (fixed)
+		(void)syslog(LOG_ERR, "gettimeofday returned bad tv_usec: corrected");
+}
+#endif
+
+void
+isc_stdtime_get(isc_stdtime_t *t) {
+	struct timeval tv;
+
+	/*
+	 * Set 't' to the number of seconds since 00:00:00 UTC, January 1,
+	 * 1970.
+	 */
+
+	REQUIRE(t != NULL);
+
+	RUNTIME_CHECK(gettimeofday(&tv, NULL) != -1);
+
+#if ISC_FIX_TV_USEC
+	fix_tv_usec(&tv);
+	INSIST(tv.tv_usec >= 0);
+#else
+	INSIST(tv.tv_usec >= 0 && tv.tv_usec < US_PER_S);
+#endif
+
+	*t = (unsigned int)tv.tv_sec;
+}