/* * Copyright (C) 1999-2001 Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* $Id: stdtime.c,v 1.1.1.1 2003/01/10 00:48:42 bbraun Exp $ */ #include <config.h> #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) { isc_boolean_t fixed = ISC_FALSE; if (tv->tv_usec < 0) { fixed = ISC_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 = ISC_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) 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; }