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/* Netgroup file parser in nss_db modules.
Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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. */
#include <db.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <bits/libc-lock.h>
#include <paths.h>
#include "nsswitch.h"
#include "netgroup.h"
#define DBFILE _PATH_VARDB "netgroup.db"
/* Locks the static variables in this file. */
__libc_lock_define_initialized (static, lock)
/* Maintenance of the shared handle open on the database. */
static DB *db;
static char *entry;
static char *cursor;
enum nss_status
_nss_db_setnetgrent (const char *group)
{
enum nss_status status = NSS_STATUS_SUCCESS;
int err;
__libc_lock_lock (lock);
/* Make sure the data base file is open. */
if (db == NULL)
{
err = __nss_db_open (DBFILE, DB_BTREE, O_RDONLY, 0, NULL, NULL, &db);
if (err != 0)
{
__set_errno (err);
status = err == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
}
else
{
/* We have to make sure the file is `closed on exec'. */
int fd;
int result, flags;
err = db->fd (db, &fd);
if (err != 0)
{
__set_errno (err);
result = -1;
}
else
result = flags = fcntl (fd, F_GETFD, 0);
if (result >= 0)
{
flags |= FD_CLOEXEC;
result = fcntl (fd, F_SETFD, flags);
}
if (result < 0)
{
/* Something went wrong. Close the stream and return a
failure. */
db->close (db, 0);
db = NULL;
status = NSS_STATUS_UNAVAIL;
}
}
}
if (status == NSS_STATUS_SUCCESS)
{
DBT key = { data: (void *) group, size: strlen (group), flags: 0 };
DBT value;
value.flags = 0;
if (db->get (db, NULL, &key, &value, 0) != 0)
status = NSS_STATUS_NOTFOUND;
else
cursor = entry = value.data;
}
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_db_endnetgrent (void)
{
__libc_lock_lock (lock);
if (db != NULL)
{
db->close (db, 0);
db = NULL;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
extern enum nss_status _nss_netgroup_parseline (char **cursor,
struct __netgrent *result,
char *buffer, size_t buflen,
int *errnop);
enum nss_status
_nss_db_getnetgrent_r (struct __netgrent *result, char *buffer, size_t buflen,
int *errnop)
{
int status;
__libc_lock_lock (lock);
status = _nss_netgroup_parseline (&cursor, result, buffer, buflen, errnop);
__libc_lock_unlock (lock);
return status;
}
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