1 /* $NetBSD: stdtime.c,v 1.4 2025/01/26 16:25:38 christos 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/strerr.h> 27 #include <isc/time.h> 28 #include <isc/util.h> 29 30 #if defined(CLOCK_REALTIME_COARSE) 31 #define CLOCKSOURCE CLOCK_REALTIME_COARSE 32 #elif defined(CLOCK_REALTIME_FAST) 33 #define CLOCKSOURCE CLOCK_REALTIME_FAST 34 #else /* if defined(CLOCK_REALTIME_COARSE) */ 35 #define CLOCKSOURCE CLOCK_REALTIME 36 #endif /* if defined(CLOCK_REALTIME_COARSE) */ 37 38 isc_stdtime_t 39 isc_stdtime_now(void) { 40 struct timespec ts; 41 42 if (clock_gettime(CLOCKSOURCE, &ts) == -1) { 43 FATAL_SYSERROR(errno, "clock_gettime()"); 44 } 45 INSIST(ts.tv_sec > 0 && ts.tv_nsec >= 0 && 46 ts.tv_nsec < (long)NS_PER_SEC); 47 48 return (isc_stdtime_t)ts.tv_sec; 49 } 50 51 void 52 isc_stdtime_tostring(isc_stdtime_t t, char *out, size_t outlen) { 53 time_t when; 54 55 REQUIRE(out != NULL); 56 REQUIRE(outlen >= 26); 57 58 /* time_t and isc_stdtime_t might be different sizes */ 59 when = t; 60 INSIST(ctime_r(&when, out) != NULL); 61 *(out + strlen(out) - 1) = '\0'; 62 } 63