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/*
* SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
* SPDX-FileCopyrightText: 1991 - 1994, Chip Rosenthal
* SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
* SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
* SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <config.h>
#ifndef USE_PAM
#ident "$Id$"
#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, 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 {
/* Remove optional trailing '\n'. */
tzbuf[strcspn (tzbuf, "\n")] = '\0';
}
if (NULL != fp) {
(void) fclose (fp);
}
return tzbuf;
}
#else /* !USE_PAM */
extern int ISO_C_forbids_an_empty_translation_unit;
#endif /* !USE_PAM */
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