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Repo Admin 2002-10-19 07:55:27 +00:00
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common/gettime.c
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/* gettime.c - Wrapper for time functions
* Copyright (C) 2002 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdlib.h>
#include <time.h>
#include "util.h"
static unsigned long timewarp;
static enum { NORMAL = 0, FROZEN, FUTURE, PAST } timemode;
/* Wrapper for the time(3). We use this here so we can fake the time
for tests */
time_t
gnupg_get_time ()
{
time_t current = time (NULL);
if (timemode == NORMAL)
return current;
else if (timemode == FROZEN)
return timewarp;
else if (timemode == FUTURE)
return current + timewarp;
else
return current - timewarp;
}
/* set the time to NEWTIME so that gnupg_get_time returns a time
starting with this one. With FREEZE set to 1 the returned time
will never change. Just for completeness, a value of (time_t)-1
for NEWTIME gets you back to rality. Note that this is obviously
not thread-safe but this is not required. */
void
gnupg_set_time (time_t newtime, int freeze)
{
time_t current = time (NULL);
if ( newtime == (time_t)-1 || current == newtime)
{
timemode = NORMAL;
timewarp = 0;
}
else if (freeze)
{
timemode = FROZEN;
timewarp = current;
}
else if (newtime > current)
{
timemode = FUTURE;
timewarp = newtime - current;
}
else
{
timemode = PAST;
timewarp = current - newtime;
}
}
/* Returns true when we are in timewarp mode */
int
gnupg_faked_time_p (void)
{
return timemode;
}