87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/*
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* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1999-2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: stdtime.c,v 1.19 2007/06/19 23:47:18 tbox Exp $ */
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/*! \file */
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#include <config.h>
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#include <stddef.h> /* NULL */
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#include <stdlib.h> /* NULL */
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#include <syslog.h>
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#include <sys/time.h>
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#include <isc/stdtime.h>
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#include <isc/util.h>
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#ifndef ISC_FIX_TV_USEC
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#define ISC_FIX_TV_USEC 1
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#endif
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#define US_PER_S 1000000
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#if ISC_FIX_TV_USEC
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static inline void
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fix_tv_usec(struct timeval *tv) {
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isc_boolean_t fixed = ISC_FALSE;
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if (tv->tv_usec < 0) {
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fixed = ISC_TRUE;
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do {
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tv->tv_sec -= 1;
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tv->tv_usec += US_PER_S;
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} while (tv->tv_usec < 0);
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} else if (tv->tv_usec >= US_PER_S) {
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fixed = ISC_TRUE;
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do {
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tv->tv_sec += 1;
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tv->tv_usec -= US_PER_S;
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} while (tv->tv_usec >=US_PER_S);
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}
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/*
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* Call syslog directly as we are called from the logging functions.
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*/
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if (fixed)
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(void)syslog(LOG_ERR, "gettimeofday returned bad tv_usec: corrected");
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}
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#endif
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void
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isc_stdtime_get(isc_stdtime_t *t) {
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struct timeval tv;
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/*
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* Set 't' to the number of seconds since 00:00:00 UTC, January 1,
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* 1970.
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*/
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REQUIRE(t != NULL);
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RUNTIME_CHECK(gettimeofday(&tv, NULL) != -1);
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#if ISC_FIX_TV_USEC
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fix_tv_usec(&tv);
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INSIST(tv.tv_usec >= 0);
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#else
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INSIST(tv.tv_usec >= 0 && tv.tv_usec < US_PER_S);
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#endif
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*t = (unsigned int)tv.tv_sec;
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}
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