wmi-1.3.16 from opsview.com
This commit is contained in:
Are Casilla
@@ -0,0 +1,370 @@
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/*
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* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "hdb_locl.h"
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RCSID("$Id: ndbm.c,v 1.38 2005/12/13 11:54:10 lha Exp $");
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#if HAVE_NDBM
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#if defined(HAVE_GDBM_NDBM_H)
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#include <gdbm/ndbm.h>
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#elif defined(HAVE_NDBM_H)
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#include <ndbm.h>
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#elif defined(HAVE_DBM_H)
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#include <dbm.h>
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#endif
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struct ndbm_db {
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DBM *db;
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int lock_fd;
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};
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static krb5_error_code
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NDBM_destroy(krb5_context context, HDB *db)
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{
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krb5_error_code ret;
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ret = hdb_clear_master_key (context, db);
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free(db->hdb_name);
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free(db);
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return 0;
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}
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static krb5_error_code
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NDBM_lock(krb5_context context, HDB *db, int operation)
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{
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struct ndbm_db *d = db->hdb_db;
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return hdb_lock(d->lock_fd, operation);
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}
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static krb5_error_code
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NDBM_unlock(krb5_context context, HDB *db)
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{
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struct ndbm_db *d = db->hdb_db;
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return hdb_unlock(d->lock_fd);
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}
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static krb5_error_code
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NDBM_seq(krb5_context context, HDB *db,
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unsigned flags, hdb_entry_ex *entry, int first)
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{
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struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
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datum key, value;
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krb5_data key_data, data;
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krb5_error_code ret = 0;
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if(first)
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key = dbm_firstkey(d->db);
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else
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key = dbm_nextkey(d->db);
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if(key.dptr == NULL)
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return HDB_ERR_NOENTRY;
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key_data.data = key.dptr;
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key_data.length = key.dsize;
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ret = db->hdb_lock(context, db, HDB_RLOCK);
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if(ret) return ret;
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value = dbm_fetch(d->db, key);
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db->hdb_unlock(context, db);
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data.data = value.dptr;
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data.length = value.dsize;
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memset(entry, 0, sizeof(*entry));
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if(hdb_value2entry(context, &data, &entry->entry))
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return NDBM_seq(context, db, flags, entry, 0);
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if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
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ret = hdb_unseal_keys (context, db, &entry->entry);
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if (ret)
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hdb_free_entry (context, entry);
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}
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if (ret == 0 && entry->entry.principal == NULL) {
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entry->entry.principal = malloc (sizeof(*entry->entry.principal));
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if (entry->entry.principal == NULL) {
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ret = ENOMEM;
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hdb_free_entry (context, entry);
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krb5_set_error_string(context, "malloc: out of memory");
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} else {
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hdb_key2principal (context, &key_data, entry->entry.principal);
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}
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}
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return ret;
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}
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static krb5_error_code
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NDBM_firstkey(krb5_context context, HDB *db,unsigned flags,hdb_entry_ex *entry)
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{
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return NDBM_seq(context, db, flags, entry, 1);
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}
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static krb5_error_code
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NDBM_nextkey(krb5_context context, HDB *db, unsigned flags,hdb_entry_ex *entry)
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{
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return NDBM_seq(context, db, flags, entry, 0);
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}
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static krb5_error_code
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NDBM_rename(krb5_context context, HDB *db, const char *new_name)
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{
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/* XXX this function will break */
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struct ndbm_db *d = db->hdb_db;
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int ret;
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char *old_dir, *old_pag, *new_dir, *new_pag;
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char *new_lock;
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int lock_fd;
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/* lock old and new databases */
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ret = db->hdb_lock(context, db, HDB_WLOCK);
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if(ret)
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return ret;
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asprintf(&new_lock, "%s.lock", new_name);
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if(new_lock == NULL) {
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db->hdb_unlock(context, db);
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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lock_fd = open(new_lock, O_RDWR | O_CREAT, 0600);
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if(lock_fd < 0) {
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ret = errno;
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db->hdb_unlock(context, db);
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krb5_set_error_string(context, "open(%s): %s", new_lock,
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strerror(ret));
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free(new_lock);
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return ret;
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}
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free(new_lock);
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ret = hdb_lock(lock_fd, HDB_WLOCK);
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if(ret) {
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db->hdb_unlock(context, db);
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close(lock_fd);
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return ret;
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}
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asprintf(&old_dir, "%s.dir", db->hdb_name);
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asprintf(&old_pag, "%s.pag", db->hdb_name);
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asprintf(&new_dir, "%s.dir", new_name);
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asprintf(&new_pag, "%s.pag", new_name);
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ret = rename(old_dir, new_dir) || rename(old_pag, new_pag);
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free(old_dir);
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free(old_pag);
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free(new_dir);
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free(new_pag);
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hdb_unlock(lock_fd);
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db->hdb_unlock(context, db);
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if(ret) {
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ret = errno;
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close(lock_fd);
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krb5_set_error_string(context, "rename: %s", strerror(ret));
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return ret;
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}
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close(d->lock_fd);
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d->lock_fd = lock_fd;
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free(db->hdb_name);
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db->hdb_name = strdup(new_name);
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return 0;
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}
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static krb5_error_code
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NDBM__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
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{
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struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
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datum k, v;
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int code;
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k.dptr = key.data;
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k.dsize = key.length;
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code = db->hdb_lock(context, db, HDB_RLOCK);
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if(code)
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return code;
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v = dbm_fetch(d->db, k);
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db->hdb_unlock(context, db);
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if(v.dptr == NULL)
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return HDB_ERR_NOENTRY;
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krb5_data_copy(reply, v.dptr, v.dsize);
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return 0;
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}
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static krb5_error_code
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NDBM__put(krb5_context context, HDB *db, int replace,
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krb5_data key, krb5_data value)
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{
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struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
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datum k, v;
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int code;
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k.dptr = key.data;
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k.dsize = key.length;
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v.dptr = value.data;
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v.dsize = value.length;
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code = db->hdb_lock(context, db, HDB_WLOCK);
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if(code)
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return code;
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code = dbm_store(d->db, k, v, replace ? DBM_REPLACE : DBM_INSERT);
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db->hdb_unlock(context, db);
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if(code == 1)
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return HDB_ERR_EXISTS;
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if (code < 0)
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return code;
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return 0;
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}
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static krb5_error_code
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NDBM__del(krb5_context context, HDB *db, krb5_data key)
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{
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struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
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datum k;
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int code;
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krb5_error_code ret;
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k.dptr = key.data;
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k.dsize = key.length;
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ret = db->hdb_lock(context, db, HDB_WLOCK);
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if(ret) return ret;
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code = dbm_delete(d->db, k);
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db->hdb_unlock(context, db);
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if(code < 0)
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return errno;
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return 0;
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}
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static krb5_error_code
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NDBM_close(krb5_context context, HDB *db)
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{
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struct ndbm_db *d = db->hdb_db;
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dbm_close(d->db);
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close(d->lock_fd);
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free(d);
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return 0;
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}
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static krb5_error_code
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NDBM_open(krb5_context context, HDB *db, int flags, mode_t mode)
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{
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krb5_error_code ret;
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struct ndbm_db *d = malloc(sizeof(*d));
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char *lock_file;
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if(d == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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asprintf(&lock_file, "%s.lock", (char*)db->hdb_name);
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if(lock_file == NULL) {
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free(d);
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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d->db = dbm_open((char*)db->hdb_name, flags, mode);
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if(d->db == NULL){
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ret = errno;
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free(d);
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free(lock_file);
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krb5_set_error_string(context, "dbm_open(%s): %s", db->hdb_name,
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strerror(ret));
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return ret;
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}
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d->lock_fd = open(lock_file, O_RDWR | O_CREAT, 0600);
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if(d->lock_fd < 0){
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ret = errno;
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dbm_close(d->db);
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free(d);
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krb5_set_error_string(context, "open(%s): %s", lock_file,
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strerror(ret));
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free(lock_file);
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return ret;
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}
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free(lock_file);
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db->hdb_db = d;
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if((flags & O_ACCMODE) == O_RDONLY)
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ret = hdb_check_db_format(context, db);
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else
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ret = hdb_init_db(context, db);
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if(ret == HDB_ERR_NOENTRY)
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return 0;
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if (ret) {
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NDBM_close(context, db);
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krb5_set_error_string(context, "hdb_open: failed %s database %s",
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(flags & O_ACCMODE) == O_RDONLY ?
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"checking format of" : "initialize",
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db->hdb_name);
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}
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return ret;
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}
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krb5_error_code
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hdb_ndbm_create(krb5_context context, HDB **db,
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const char *filename)
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{
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*db = calloc(1, sizeof(**db));
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if (*db == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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(*db)->hdb_db = NULL;
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(*db)->hdb_name = strdup(filename);
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if ((*db)->hdb_name == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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free(*db);
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*db = NULL;
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return ENOMEM;
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}
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(*db)->hdb_master_key_set = 0;
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(*db)->hdb_openp = 0;
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(*db)->hdb_open = NDBM_open;
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(*db)->hdb_close = NDBM_close;
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(*db)->hdb_fetch = _hdb_fetch;
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(*db)->hdb_store = _hdb_store;
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(*db)->hdb_remove = _hdb_remove;
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(*db)->hdb_firstkey = NDBM_firstkey;
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(*db)->hdb_nextkey= NDBM_nextkey;
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(*db)->hdb_lock = NDBM_lock;
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(*db)->hdb_unlock = NDBM_unlock;
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(*db)->hdb_rename = NDBM_rename;
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(*db)->hdb__get = NDBM__get;
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(*db)->hdb__put = NDBM__put;
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(*db)->hdb__del = NDBM__del;
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(*db)->hdb_destroy = NDBM_destroy;
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return 0;
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}
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#endif /* HAVE_NDBM */
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