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/*
* Copyright (c) 1993 - 1994, Julianne Frances Haugh
* Copyright (c) 1996 - 1998, Marek Michałkiewicz
* Copyright (c) 2005 , Tomasz Kłoczko
* 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 HAVE_GETUTENT
#include "defines.h"
#include <stdio.h>
#include <fcntl.h>
#include <utmp.h>
#ifndef lint
static char rcsid[] = "$Id: utent.c 3181 2010-03-23 08:56:52Z nekral-guest $";
#endif
static int utmp_fd = -1;
static struct utmp utmp_buf;
/*
* setutent - open or rewind the utmp file
*/
void setutent (void)
{
if (utmp_fd == -1)
if ((utmp_fd = open (_UTMP_FILE, O_RDWR)) == -1)
utmp_fd = open (_UTMP_FILE, O_RDONLY);
if (utmp_fd != -1)
lseek (utmp_fd, (off_t) 0L, SEEK_SET);
}
/*
* endutent - close the utmp file
*/
void endutent (void)
{
if (utmp_fd != -1)
close (utmp_fd);
utmp_fd = -1;
}
/*
* getutent - get the next record from the utmp file
*/
struct utmp *getutent (void)
{
if (utmp_fd == -1)
setutent ();
if (utmp_fd == -1)
return 0;
if (read (utmp_fd, &utmp_buf, sizeof utmp_buf) != sizeof utmp_buf)
return 0;
return &utmp_buf;
}
#else
extern int errno; /* warning: ANSI C forbids an empty source file */
#endif
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