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/*
* lib/krb5/os/ustime.c
*
* Copyright 1990,1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* krb5_mstimeofday for BSD 4.3
*/
#include "k5-int.h"
#ifndef _MSDOS
extern int errno;
static struct timeval last_tv = {0, 0};
krb5_error_code INTERFACE
krb5_us_timeofday(context, seconds, microseconds)
krb5_context context;
register krb5_int32 *seconds, *microseconds;
{
struct timeval tv;
if (gettimeofday(&tv, (struct timezone *)0) == -1) {
/* failed, return errno */
return (krb5_error_code) errno;
}
if ((tv.tv_sec == last_tv.tv_sec) && (tv.tv_usec == last_tv.tv_usec)) {
if (++last_tv.tv_usec >= 1000000) {
last_tv.tv_usec = 0;
last_tv.tv_sec++;
}
tv = last_tv;
} else
last_tv = tv;
*seconds = tv.tv_sec;
*microseconds = tv.tv_usec;
return 0;
}
#else /* DOS version */
/*
* Originally written by John Gilmore, Cygnus Support, May '94.
* Public Domain.
*/
#include <time.h>
#include <sys/timeb.h>
#include <dos.h>
#include <string.h>
/*
* Time handling. Translate Unix time calls into Kerberos internal
* procedure calls.
*
* Due to the fact that DOS time can be unreliable we have reverted
* to using the AT hardware clock and converting it to Unix time.
*/
static time_t win_gettime ();
static long win_time_get_epoch(); /* Adjust for MSC 7.00 bug */
krb5_error_code INTERFACE
krb5_us_timeofday(context, seconds, microseconds)
krb5_context context;
register krb5_int32 *seconds, *microseconds;
{
krb5_int32 sec, usec;
static krb5_int32 last_sec = 0;
static krb5_int32 last_usec = 0;
sec = win_gettime (); /* Get the current time */
usec = 0; /* Can't do microseconds */
if (sec == last_sec) { /* Same as last time??? */
usec = ++last_usec; /* Yep, so do microseconds */
if (usec >= 1000000) {
++sec;
usec = 0;
}
}
last_sec = sec; /* Remember for next time */
last_usec = usec;
*seconds = sec; /* Return the values */
*microseconds = usec;
return 0;
}
static time_t
win_gettime () {
struct tm tm;
union _REGS inregs; /* For calling BIOS */
union _REGS outregs;
struct _timeb now;
time_t time;
long convert; /* MSC 7.00 bug work around */
_ftime(&now); /* Daylight savings time */
/* Get time from AT hardware clock INT 0x1A, AH=2 */
memset(&inregs, 0, sizeof(inregs));
inregs.h.ah = 2;
_int86(0x1a, &inregs, &outregs);
/* 0x13 = decimal 13, hence the decoding below */
tm.tm_sec = 10 * ((outregs.h.dh & 0xF0) >> 4) + (outregs.h.dh & 0x0F);
tm.tm_min = 10 * ((outregs.h.cl & 0xF0) >> 4) + (outregs.h.cl & 0x0F);
tm.tm_hour = 10 * ((outregs.h.ch & 0xF0) >> 4) + (outregs.h.ch & 0x0F);
/* Get date from AT hardware clock INT 0x1A, AH=4 */
memset(&inregs, 0, sizeof(inregs));
inregs.h.ah = 4;
_int86(0x1a, &inregs, &outregs);
tm.tm_mday = 10 * ((outregs.h.dl & 0xF0) >> 4) + (outregs.h.dl & 0x0F);
tm.tm_mon = 10 * ((outregs.h.dh & 0xF0) >> 4) + (outregs.h.dh & 0x0F) - 1;
tm.tm_year = 10 * ((outregs.h.cl & 0xF0) >> 4) + (outregs.h.cl & 0x0F);
tm.tm_year += 100 * ((10 * (outregs.h.ch & 0xF0) >> 4)
+ (outregs.h.ch & 0x0F) - 19);
tm.tm_wday = 0;
tm.tm_yday = 0;
tm.tm_isdst = now.dstflag;
time = mktime(&tm);
convert = win_time_get_epoch();
return time + convert;
}
/*
* This routine figures out the current time epoch and returns the
* conversion factor. It exists because
* Microloss screwed the pooch on the time() and _ftime() calls in
* its release 7.0 libraries. They changed the epoch to Dec 31, 1899!
* Idiots... We try to cope.
*/
static struct tm jan_1_70 = {0, 0, 0, 1, 0, 70};
static long epoch = 0;
static int epoch_set = 0;
long
win_time_get_epoch()
{
if (!epoch_set) {
epoch = 0 - mktime (&jan_1_70); /* Seconds til 1970 localtime */
epoch += _timezone; /* Seconds til 1970 GMT */
epoch_set = 1;
}
return epoch;
}
#endif
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