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-rw-r--r--lib/isc/unix/stdtime.c80
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diff --git a/lib/isc/unix/stdtime.c b/lib/isc/unix/stdtime.c
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+/*
+ * 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;
+}