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/*
* Copyright (c) 1991 - 1994, Julianne Frances Haugh
* Copyright (c) 1991 - 1994, Chip Rosenthal
* Copyright (c) 1996 - 1998, Marek Michałkiewicz
* Copyright (c) 2003 - 2005, Tomasz Kłoczko
* Copyright (c) 2007 - 2010, Nicolas François
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the copyright holders or contributors may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#ifndef USE_PAM
#ident "$Id: tz.c 3231 2010-08-22 13:04:54Z nekral-guest $"
#include <stdio.h>
#include <string.h>
#include "defines.h"
#include "prototypes.h"
#include "getdef.h"
/*
* tz - return local timezone name
*
* tz() determines the name of the local timezone by reading the
* contents of the file named by ``fname''.
*/
/*@observer@*/const char *tz (const char *fname)
{
FILE *fp = NULL;
static char tzbuf[BUFSIZ];
const char *def_tz = "TZ=CST6CDT";
fp = fopen (fname, "r");
if ( (NULL == fp)
|| (fgets (tzbuf, (int) sizeof (tzbuf), fp) == NULL)) {
def_tz = getdef_str ("ENV_TZ");
if ((NULL == def_tz) || ('/' == def_tz[0])) {
def_tz = "TZ=CST6CDT";
}
strcpy (tzbuf, def_tz);
} else {
tzbuf[strlen (tzbuf) - 1] = '\0';
}
if (NULL != fp) {
(void) fclose (fp);
}
return tzbuf;
}
#else /* !USE_PAM */
extern int errno; /* warning: ANSI C forbids an empty source file */
#endif /* !USE_PAM */
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