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/* Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#if _LIBC
#include <libc-lock.h>
#else
#define __libc_lock_lock(NAME) ((void) 0)
#define __libc_lock_unlock(NAME) ((void) 0)
#define __libc_lock_define(CLASS,NAME)
#define weak_alias(name, aliasname) \
extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
#endif
#include <stdlib.h>
#include <string.h>
#include <utmp.h>
#include "utmp-private.h"
/* This is the default name. */
static const char default_file_name[] = _PATH_UTMP;
/* Current file name. */
const char *__libc_utmp_file_name = (const char *) default_file_name;
/* We have to use the lock in getutent_r.c. */
__libc_lock_define (extern, __libc_utmp_lock)
int
__utmpname (const char *file)
{
int result = -1;
__libc_lock_lock (__libc_utmp_lock);
/* Close the old file. */
(*__libc_utmp_jump_table->endutent) ();
if (strcmp (file, __libc_utmp_file_name) != 0)
{
if (strcmp (file, default_file_name) == 0)
{
if (__libc_utmp_file_name != default_file_name)
free ((char *) __libc_utmp_file_name);
__libc_utmp_file_name = default_file_name;
}
else
{
char *file_name = __strdup (file);
if (file_name == NULL)
/* Out of memory. */
goto done;
if (__libc_utmp_file_name != default_file_name)
free ((char *) __libc_utmp_file_name);
__libc_utmp_file_name = file_name;
}
}
__libc_utmp_jump_table = &__libc_utmp_unknown_functions;
result = 0;
done:
__libc_lock_unlock (__libc_utmp_lock);
return result;
}
weak_alias (__utmpname, utmpname)
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