shadow/lib/utent.c
Serge Hallyn f93cf255d4 Update licensing info
Closes #238

Update all files to list SPDX license shortname.  Most files are
BSD 3 clause license.

The exceptions are:

serge@sl ~/src/shadow$ git grep SPDX-License | grep -v BSD-3-Clause
contrib/atudel:# SPDX-License-Identifier: BSD-4-Clause
lib/tcbfuncs.c: * SPDX-License-Identifier: 0BSD
libmisc/salt.c: * SPDX-License-Identifier: Unlicense
src/login_nopam.c: * SPDX-License-Identifier: Unlicense
src/nologin.c: * SPDX-License-Identifier: BSD-2-Clause
src/vipw.c: * SPDX-License-Identifier: GPL-2.0-or-later

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-12-23 19:36:50 -06:00

71 lines
1.2 KiB
C

/*
* SPDX-FileCopyrightText: 1993 - 1994, Julianne Frances Haugh
* SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
* SPDX-FileCopyrightText: 2005 , Tomasz Kłoczko
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <config.h>
#ifndef HAVE_GETUTENT
#include "defines.h"
#include <stdio.h>
#include <fcntl.h>
#include <utmp.h>
#ifndef lint
static char rcsid[] = "$Id$";
#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