59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/*
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* SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1991 - 1994, Chip Rosenthal
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* SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <config.h>
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#ifndef USE_PAM
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#ident "$Id$"
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#include <stdio.h>
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#include <string.h>
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#include "defines.h"
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#include "prototypes.h"
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#include "getdef.h"
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/*
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* tz - return local timezone name
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*
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* tz() determines the name of the local timezone by reading the
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* contents of the file named by ``fname''.
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*/
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/*@observer@*/const char *tz (const char *fname)
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{
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FILE *fp = NULL;
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static char tzbuf[BUFSIZ];
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const char *def_tz = "TZ=CST6CDT";
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fp = fopen (fname, "r");
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if ( (NULL == fp)
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|| (fgets (tzbuf, sizeof (tzbuf), fp) == NULL)) {
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def_tz = getdef_str ("ENV_TZ");
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if ((NULL == def_tz) || ('/' == def_tz[0])) {
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def_tz = "TZ=CST6CDT";
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}
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strcpy (tzbuf, def_tz);
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} else {
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/* Remove optional trailing '\n'. */
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tzbuf[strcspn (tzbuf, "\n")] = '\0';
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}
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if (NULL != fp) {
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(void) fclose (fp);
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}
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return tzbuf;
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}
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#else /* !USE_PAM */
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extern int ISO_C_forbids_an_empty_translation_unit;
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#endif /* !USE_PAM */
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