1*eabc0478Schristos /* $NetBSD: stdtime.c,v 1.2 2024/08/18 20:47:16 christos Exp $ */ 2897be3a4Schristos 3897be3a4Schristos /* 4897be3a4Schristos * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") 5897be3a4Schristos * Copyright (C) 1999-2001 Internet Software Consortium. 6897be3a4Schristos * 7897be3a4Schristos * Permission to use, copy, modify, and/or distribute this software for any 8897be3a4Schristos * purpose with or without fee is hereby granted, provided that the above 9897be3a4Schristos * copyright notice and this permission notice appear in all copies. 10897be3a4Schristos * 11897be3a4Schristos * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12897be3a4Schristos * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13897be3a4Schristos * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14897be3a4Schristos * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15897be3a4Schristos * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16897be3a4Schristos * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17897be3a4Schristos * PERFORMANCE OF THIS SOFTWARE. 18897be3a4Schristos */ 19897be3a4Schristos 20897be3a4Schristos /* Id: stdtime.c,v 1.19 2007/06/19 23:47:18 tbox Exp */ 21897be3a4Schristos 22897be3a4Schristos /*! \file */ 23897be3a4Schristos 24897be3a4Schristos #include <config.h> 25897be3a4Schristos 26897be3a4Schristos #include <stddef.h> /* NULL */ 27897be3a4Schristos #include <stdlib.h> /* NULL */ 28897be3a4Schristos #include <syslog.h> 29897be3a4Schristos 30897be3a4Schristos #include <sys/time.h> 31897be3a4Schristos 32897be3a4Schristos #include <isc/stdtime.h> 33897be3a4Schristos #include <isc/util.h> 34897be3a4Schristos 35897be3a4Schristos #ifndef ISC_FIX_TV_USEC 36897be3a4Schristos #define ISC_FIX_TV_USEC 1 37897be3a4Schristos #endif 38897be3a4Schristos 39897be3a4Schristos #define US_PER_S 1000000 40897be3a4Schristos 41897be3a4Schristos #if ISC_FIX_TV_USEC 42897be3a4Schristos static inline void 43897be3a4Schristos fix_tv_usec(struct timeval *tv) { 44897be3a4Schristos isc_boolean_t fixed = ISC_FALSE; 45897be3a4Schristos 46897be3a4Schristos if (tv->tv_usec < 0) { 47897be3a4Schristos fixed = ISC_TRUE; 48897be3a4Schristos do { 49897be3a4Schristos tv->tv_sec -= 1; 50897be3a4Schristos tv->tv_usec += US_PER_S; 51897be3a4Schristos } while (tv->tv_usec < 0); 52897be3a4Schristos } else if (tv->tv_usec >= US_PER_S) { 53897be3a4Schristos fixed = ISC_TRUE; 54897be3a4Schristos do { 55897be3a4Schristos tv->tv_sec += 1; 56897be3a4Schristos tv->tv_usec -= US_PER_S; 57897be3a4Schristos } while (tv->tv_usec >=US_PER_S); 58897be3a4Schristos } 59897be3a4Schristos /* 60897be3a4Schristos * Call syslog directly as we are called from the logging functions. 61897be3a4Schristos */ 62897be3a4Schristos if (fixed) 63897be3a4Schristos (void)syslog(LOG_ERR, "gettimeofday returned bad tv_usec: corrected"); 64897be3a4Schristos } 65897be3a4Schristos #endif 66897be3a4Schristos 67897be3a4Schristos void 68897be3a4Schristos isc_stdtime_get(isc_stdtime_t *t) { 69897be3a4Schristos struct timeval tv; 70897be3a4Schristos 71897be3a4Schristos /* 72897be3a4Schristos * Set 't' to the number of seconds since 00:00:00 UTC, January 1, 73897be3a4Schristos * 1970. 74897be3a4Schristos */ 75897be3a4Schristos 76897be3a4Schristos REQUIRE(t != NULL); 77897be3a4Schristos 78897be3a4Schristos RUNTIME_CHECK(gettimeofday(&tv, NULL) != -1); 79897be3a4Schristos 80897be3a4Schristos #if ISC_FIX_TV_USEC 81897be3a4Schristos fix_tv_usec(&tv); 82897be3a4Schristos INSIST(tv.tv_usec >= 0); 83897be3a4Schristos #else 84897be3a4Schristos INSIST(tv.tv_usec >= 0 && tv.tv_usec < US_PER_S); 85897be3a4Schristos #endif 86897be3a4Schristos 87897be3a4Schristos *t = (unsigned int)tv.tv_sec; 88897be3a4Schristos } 89