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/*
* Copyright (c) 2017 Todd C. Miller <Todd.Miller@sudo.ws>
*
* 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 THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "sudo_compat.h"
#include "sudoers_debug.h"
#include "parse.h"
/*
* Returns the offset from GMT in seconds (algorithm taken from sendmail).
* Warning: clobbers the static storage used by localtime() and gmtime().
*/
#ifdef HAVE_STRUCT_TM_TM_GMTOFF
long
get_gmtoff(time_t *clock)
{
struct tm *local;
local = localtime(clock);
return local->tm_gmtoff;
}
#else
long
get_gmtoff(time_t *clock)
{
struct tm *gm, gmt, *local;
long offset;
if ((gm = gmtime(clock)) == NULL)
return 0;
gmt = *gm;
if ((local = localtime(clock)) == NULL)
return 0;
offset = (local->tm_sec - gmt.tm_sec) +
((local->tm_min - gmt.tm_min) * 60) +
((local->tm_hour - gmt.tm_hour) * 3600);
/* Timezone may cause year rollover to happen on a different day. */
if (local->tm_year < gmt.tm_year)
offset -= 24 * 3600;
else if (local->tm_year > gmt.tm_year)
offset -= 24 * 3600;
else if (local->tm_yday < gmt.tm_yday)
offset -= 24 * 3600;
else if (local->tm_yday > gmt.tm_yday)
offset += 24 * 3600;
return offset;
}
#endif /* HAVE_TM_GMTOFF */
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