f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
/* $NetBSD: utmp.c,v 1.10 2011/10/15 23:00:02 christos Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2002 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Christos Zoulas.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
__RCSID("$NetBSD: utmp.c,v 1.10 2011/10/15 23:00:02 christos Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <utmp.h>
|
|
#include <sys/stat.h>
|
|
|
|
static struct utmp utmp;
|
|
static FILE *ut;
|
|
static char utfile[MAXPATHLEN] = _PATH_UTMP;
|
|
|
|
void
|
|
setutent(void)
|
|
{
|
|
if (ut == NULL)
|
|
return;
|
|
(void)fseeko(ut, (off_t)0, SEEK_SET);
|
|
}
|
|
|
|
struct utmp *
|
|
getutent(void)
|
|
{
|
|
if (ut == NULL) {
|
|
struct stat st;
|
|
off_t numentries;
|
|
if ((ut = fopen(utfile, "re")) == NULL)
|
|
return NULL;
|
|
if (fstat(fileno(ut), &st) == -1)
|
|
goto out;
|
|
/*
|
|
* If we have a an old version utmp file bail.
|
|
*/
|
|
numentries = st.st_size / sizeof(utmp);
|
|
if ((off_t)(numentries * sizeof(utmp)) != st.st_size)
|
|
goto out;
|
|
}
|
|
if (fread(&utmp, sizeof(utmp), 1, ut) == 1)
|
|
return &utmp;
|
|
out:
|
|
(void)fclose(ut);
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
endutent(void)
|
|
{
|
|
if (ut != NULL) {
|
|
(void)fclose(ut);
|
|
ut = NULL;
|
|
}
|
|
}
|
|
|
|
int
|
|
utmpname(const char *fname)
|
|
{
|
|
size_t len = strlen(fname);
|
|
|
|
if (len >= sizeof(utfile))
|
|
return 0;
|
|
|
|
/* must not end in x! */
|
|
if (fname[len - 1] == 'x')
|
|
return 0;
|
|
|
|
(void)strlcpy(utfile, fname, sizeof(utfile));
|
|
endutent();
|
|
return 1;
|
|
}
|
|
|
|
#ifdef __minix
|
|
__weak_alias(getutent, __getutent50)
|
|
#endif
|