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