146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
/* Netgroup file parser in nss_db modules.
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Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <db.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <bits/libc-lock.h>
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#include <paths.h>
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#include "nsswitch.h"
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#include "netgroup.h"
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#define DBFILE _PATH_VARDB "netgroup.db"
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/* Locks the static variables in this file. */
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__libc_lock_define_initialized (static, lock)
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/* Maintenance of the shared handle open on the database. */
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static DB *db;
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static char *entry;
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static char *cursor;
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enum nss_status
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_nss_db_setnetgrent (const char *group)
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{
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enum nss_status status = NSS_STATUS_SUCCESS;
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int err;
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__libc_lock_lock (lock);
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/* Make sure the data base file is open. */
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if (db == NULL)
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{
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err = __nss_db_open (DBFILE, DB_BTREE, O_RDONLY, 0, NULL, NULL, &db);
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if (err != 0)
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{
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__set_errno (err);
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status = err == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
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}
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else
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{
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/* We have to make sure the file is `closed on exec'. */
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int fd;
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int result;
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err = db->fd (db, &fd);
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if (err != 0)
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{
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__set_errno (err);
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result = -1;
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}
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else
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{
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result = fcntl (fd, F_GETFD, 0);
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if (result >= 0)
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result = fcntl (fd, F_SETFD, result | FD_CLOEXEC);
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}
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if (result < 0)
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{
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/* Something went wrong. Close the stream and return a
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failure. */
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db->close (db, 0);
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db = NULL;
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status = NSS_STATUS_UNAVAIL;
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}
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}
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}
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if (status == NSS_STATUS_SUCCESS)
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{
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DBT key = { data: (void *) group, size: strlen (group), flags: 0 };
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DBT value;
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value.flags = 0;
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if (db->get (db, NULL, &key, &value, 0) != 0)
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status = NSS_STATUS_NOTFOUND;
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else
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cursor = entry = value.data;
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}
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__libc_lock_unlock (lock);
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return status;
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}
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enum nss_status
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_nss_db_endnetgrent (void)
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{
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__libc_lock_lock (lock);
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if (db != NULL)
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{
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db->close (db, 0);
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db = NULL;
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}
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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extern enum nss_status _nss_netgroup_parseline (char **cursor,
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struct __netgrent *result,
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char *buffer, size_t buflen,
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int *errnop);
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enum nss_status
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_nss_db_getnetgrent_r (struct __netgrent *result, char *buffer, size_t buflen,
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int *errnop)
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{
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int status;
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__libc_lock_lock (lock);
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status = _nss_netgroup_parseline (&cursor, result, buffer, buflen, errnop);
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__libc_lock_unlock (lock);
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return status;
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}
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