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stdtime.c revision 1.2.2.2 
      1 /*	$NetBSD: stdtime.c,v 1.2.2.2 2024/02/25 15:47:18 martin Exp $	*/
      2 
      3 /*
      4  * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
      5  *
      6  * SPDX-License-Identifier: MPL-2.0
      7  *
      8  * This Source Code Form is subject to the terms of the Mozilla Public
      9  * License, v. 2.0. If a copy of the MPL was not distributed with this
     10  * file, you can obtain one at https://mozilla.org/MPL/2.0/.
     11  *
     12  * See the COPYRIGHT file distributed with this work for additional
     13  * information regarding copyright ownership.
     14  */
     15 
     16 /*! \file */
     17 
     18 #include <errno.h>
     19 #include <stdbool.h>
     20 #include <stddef.h> /* NULL */
     21 #include <stdlib.h> /* NULL */
     22 #include <syslog.h>
     23 #include <time.h>
     24 
     25 #include <isc/stdtime.h>
     26 #include <isc/time.h>
     27 #include <isc/util.h>
     28 
     29 #if defined(CLOCK_REALTIME_COARSE)
     30 #define CLOCKSOURCE CLOCK_REALTIME_COARSE
     31 #elif defined(CLOCK_REALTIME_FAST)
     32 #define CLOCKSOURCE CLOCK_REALTIME_FAST
     33 #else /* if defined(CLOCK_REALTIME_COARSE) */
     34 #define CLOCKSOURCE CLOCK_REALTIME
     35 #endif /* if defined(CLOCK_REALTIME_COARSE) */
     36 
     37 void
     38 isc_stdtime_get(isc_stdtime_t *t) {
     39 	REQUIRE(t != NULL);
     40 
     41 	struct timespec ts;
     42 
     43 	if (clock_gettime(CLOCKSOURCE, &ts) == -1) {
     44 		FATAL_SYSERROR(errno, "clock_gettime()");
     45 	}
     46 
     47 	REQUIRE(ts.tv_sec > 0 && ts.tv_nsec >= 0 && ts.tv_nsec < NS_PER_SEC);
     48 
     49 	*t = (isc_stdtime_t)ts.tv_sec;
     50 }
     51 
     52 void
     53 isc_stdtime_tostring(isc_stdtime_t t, char *out, size_t outlen) {
     54 	time_t when;
     55 
     56 	REQUIRE(out != NULL);
     57 	REQUIRE(outlen >= 26);
     58 
     59 	UNUSED(outlen);
     60 
     61 	/* time_t and isc_stdtime_t might be different sizes */
     62 	when = t;
     63 	INSIST((ctime_r(&when, out) != NULL));
     64 	*(out + strlen(out) - 1) = '\0';
     65 }
     66