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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1995 Sun Microsystems, Inc. All rights reserved.
*/
#ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <tzfile.h>
#include <sys/time.h>
static int get_tzp_info(void);
extern long _timezone, _altzone; /* from the base libc */
/*
* The second parameter to gettimeofday() did not work correctly on
* 4.x, and it was documented that localtime() should be used instead.
* This is an attempt to provide correctly what 4.x meant to do. There
* are shortcomings, however. See notes for DST_RUM and DST_AUSTALT.
*/
int
gettimeofday(tp, tzp)
struct timeval *tp;
struct timezone *tzp;
{
int ret = 0;
if (tp != NULL)
if ((ret = _gettimeofday(tp)) == -1)
maperror();
/*
* We should call localtime() with the current time and
* set tz_minuteswest to _altzone/SECSPERMIN if tm_isdst
* is set. But we want to be bug-for-bug compatible with
* 4.x, which would never adjust for DST. Futher comments
* are in get_tzp_info().
*/
if (tzp != NULL) {
_tzset();
tzp->tz_dsttime = get_tzp_info();
tzp->tz_minuteswest = _timezone/SECSPERMIN;
}
return(ret);
}
static int
get_tzp_info()
{
char *zonename = getenv("TZ");
if ((zonename == NULL) || (*zonename == '\0'))
return (DST_NONE);
if ((strncmp(zonename, "US/", 3) == 0) ||
(strcmp(zonename, "PST8PDT") == 0) ||
(strcmp(zonename, "MST7MDT") == 0) ||
(strcmp(zonename, "CST6CDT") == 0) ||
(strcmp(zonename, "EST5EDT") == 0) ||
(strncmp(zonename, "America/", 8) == 0))
return (DST_USA);
if (strncmp(zonename, "Australia/", 10) == 0)
return (DST_AUST);
if (strcmp(zonename, "WET") == 0)
return (DST_WET);
if (strcmp(zonename, "MET") == 0)
return (DST_MET);
if (strcmp(zonename, "EET") == 0)
return (DST_EET);
if (strncmp(zonename, "Canada/", 7) == 0)
return (DST_CAN);
if ((strcmp(zonename, "GB") == 0) ||
(strcmp(zonename, "GB-Eire") == 0))
return (DST_GB);
/*
* what's the corresponding DST_RUM: Rumanian DST?
* There was not Rumanian timezone on 4.x.
*/
if (strcmp(zonename, "Turkey") == 0)
return (DST_TUR);
/*
* How do we differentiate between DST_AUST and DST_AUSTALT?
* It seems that all of our current Australia timezones do
* not have the 1986 shift, so we never will return DST_AUSTALT.
*/
return (DST_NONE);
}
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