699 lines
14 KiB
C
699 lines
14 KiB
C
/*
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** Copyright (c) 1999-2001 Sendmail, Inc. and its suppliers.
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** All rights reserved.
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**
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** By using this file, you agree to the terms and conditions set
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** forth in the LICENSE file which can be found at the top level of
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** the sendmail distribution.
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*/
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#ifndef lint
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static char id[] = "@(#)$Id: smdb2.c,v 8.53.2.1.2.7 2001/02/14 04:07:24 gshapiro Exp $";
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#endif /* ! lint */
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sendmail/sendmail.h>
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#include <libsmdb/smdb.h>
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#if (DB_VERSION_MAJOR >= 2)
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# define SMDB2_FILE_EXTENSION "db"
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struct smdb_db2_database
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{
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DB *smdb2_db;
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int smdb2_lock_fd;
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};
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typedef struct smdb_db2_database SMDB_DB2_DATABASE;
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/*
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** SMDB_TYPE_TO_DB2_TYPE -- Translates smdb database type to db2 type.
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**
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** Parameters:
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** type -- The type to translate.
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**
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** Returns:
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** The DB2 type that corresponsds to the passed in SMDB type.
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** Returns -1 if there is no equivalent type.
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**
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*/
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DBTYPE
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smdb_type_to_db2_type(type)
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SMDB_DBTYPE type;
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{
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if (type == SMDB_TYPE_DEFAULT)
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return DB_HASH;
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if (strncmp(type, SMDB_TYPE_HASH, SMDB_TYPE_HASH_LEN) == 0)
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return DB_HASH;
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if (strncmp(type, SMDB_TYPE_BTREE, SMDB_TYPE_BTREE_LEN) == 0)
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return DB_BTREE;
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return DB_UNKNOWN;
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}
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/*
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** DB2_ERROR_TO_SMDB -- Translates db2 errors to smdbe errors
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**
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** Parameters:
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** error -- The error to translate.
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**
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** Returns:
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** The SMDBE error corresponding to the db2 error.
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** If we don't have a corresponding error, it returs errno.
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**
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*/
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int
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db2_error_to_smdb(error)
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int error;
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{
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int result;
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switch (error)
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{
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# ifdef DB_INCOMPLETE
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case DB_INCOMPLETE:
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result = SMDBE_INCOMPLETE;
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break;
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# endif /* DB_INCOMPLETE */
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# ifdef DB_NOTFOUND
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case DB_NOTFOUND:
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result = SMDBE_NOT_FOUND;
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break;
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# endif /* DB_NOTFOUND */
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# ifdef DB_KEYEMPTY
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case DB_KEYEMPTY:
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result = SMDBE_KEY_EMPTY;
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break;
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# endif /* DB_KEYEMPTY */
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# ifdef DB_KEYEXIST
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case DB_KEYEXIST:
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result = SMDBE_KEY_EXIST;
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break;
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# endif /* DB_KEYEXIST */
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# ifdef DB_LOCK_DEADLOCK
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case DB_LOCK_DEADLOCK:
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result = SMDBE_LOCK_DEADLOCK;
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break;
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# endif /* DB_LOCK_DEADLOCK */
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# ifdef DB_LOCK_NOTGRANTED
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case DB_LOCK_NOTGRANTED:
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result = SMDBE_LOCK_NOT_GRANTED;
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break;
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# endif /* DB_LOCK_NOTGRANTED */
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# ifdef DB_LOCK_NOTHELD
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case DB_LOCK_NOTHELD:
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result = SMDBE_LOCK_NOT_HELD;
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break;
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# endif /* DB_LOCK_NOTHELD */
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# ifdef DB_RUNRECOVERY
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case DB_RUNRECOVERY:
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result = SMDBE_RUN_RECOVERY;
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break;
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# endif /* DB_RUNRECOVERY */
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# ifdef DB_OLD_VERSION
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case DB_OLD_VERSION:
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result = SMDBE_OLD_VERSION;
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break;
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# endif /* DB_OLD_VERSION */
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case 0:
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result = SMDBE_OK;
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break;
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default:
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result = error;
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}
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return result;
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}
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/*
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** SMDB_PUT_FLAGS_TO_DB2_FLAGS -- Translates smdb put flags to db2 put flags.
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**
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** Parameters:
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** flags -- The flags to translate.
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**
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** Returns:
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** The db2 flags that are equivalent to the smdb flags.
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**
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** Notes:
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** Any invalid flags are ignored.
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**
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*/
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u_int
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smdb_put_flags_to_db2_flags(flags)
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SMDB_FLAG flags;
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{
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int return_flags;
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return_flags = 0;
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if (bitset(SMDBF_NO_OVERWRITE, flags))
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return_flags |= DB_NOOVERWRITE;
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return return_flags;
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}
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/*
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** SMDB_CURSOR_GET_FLAGS_TO_DB2 -- Translates smdb cursor get flags to db2
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** getflags.
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**
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** Parameters:
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** flags -- The flags to translate.
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**
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** Returns:
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** The db2 flags that are equivalent to the smdb flags.
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**
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** Notes:
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** -1 is returned if flag is unknown.
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**
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*/
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int
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smdb_cursor_get_flags_to_db2(flags)
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SMDB_FLAG flags;
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{
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switch (flags)
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{
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case SMDB_CURSOR_GET_FIRST:
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return DB_FIRST;
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case SMDB_CURSOR_GET_LAST:
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return DB_LAST;
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case SMDB_CURSOR_GET_NEXT:
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return DB_NEXT;
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case SMDB_CURSOR_GET_RANGE:
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return DB_SET_RANGE;
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default:
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return -1;
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}
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}
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SMDB_DB2_DATABASE *
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smdb2_malloc_database()
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{
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SMDB_DB2_DATABASE *db2;
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db2 = (SMDB_DB2_DATABASE *) malloc(sizeof(SMDB_DB2_DATABASE));
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if (db2 != NULL)
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db2->smdb2_lock_fd = -1;
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return db2;
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}
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/*
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** Except for smdb_db_open, the rest of these function correspond to the
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** interface laid out in smdb.h.
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*/
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int
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smdb2_close(database)
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SMDB_DATABASE *database;
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{
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SMDB_DB2_DATABASE *db2 = (SMDB_DB2_DATABASE *) database->smdb_impl;
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DB *db = ((SMDB_DB2_DATABASE *) database->smdb_impl)->smdb2_db;
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if (db2->smdb2_lock_fd != -1)
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close(db2->smdb2_lock_fd);
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free(db2);
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database->smdb_impl = NULL;
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return db2_error_to_smdb(db->close(db, 0));
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}
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int
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smdb2_del(database, key, flags)
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SMDB_DATABASE *database;
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SMDB_DBENT *key;
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u_int flags;
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{
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DB *db = ((SMDB_DB2_DATABASE *) database->smdb_impl)->smdb2_db;
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DBT dbkey;
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memset(&dbkey, '\0', sizeof dbkey);
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dbkey.data = key->data;
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dbkey.size = key->size;
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return db2_error_to_smdb(db->del(db, NULL, &dbkey, flags));
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}
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int
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smdb2_fd(database, fd)
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SMDB_DATABASE *database;
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int *fd;
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{
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DB *db = ((SMDB_DB2_DATABASE *) database->smdb_impl)->smdb2_db;
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return db2_error_to_smdb(db->fd(db, fd));
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}
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int
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smdb2_lockfd(database)
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SMDB_DATABASE *database;
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{
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SMDB_DB2_DATABASE *db2 = (SMDB_DB2_DATABASE *) database->smdb_impl;
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return db2->smdb2_lock_fd;
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}
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int
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smdb2_get(database, key, data, flags)
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SMDB_DATABASE *database;
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SMDB_DBENT *key;
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SMDB_DBENT *data;
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u_int flags;
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{
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int result;
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DB *db = ((SMDB_DB2_DATABASE *) database->smdb_impl)->smdb2_db;
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DBT dbkey, dbdata;
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memset(&dbdata, '\0', sizeof dbdata);
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memset(&dbkey, '\0', sizeof dbkey);
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dbkey.data = key->data;
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dbkey.size = key->size;
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result = db->get(db, NULL, &dbkey, &dbdata, flags);
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data->data = dbdata.data;
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data->size = dbdata.size;
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return db2_error_to_smdb(result);
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}
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int
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smdb2_put(database, key, data, flags)
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SMDB_DATABASE *database;
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SMDB_DBENT *key;
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SMDB_DBENT *data;
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u_int flags;
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{
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DB *db = ((SMDB_DB2_DATABASE *) database->smdb_impl)->smdb2_db;
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DBT dbkey, dbdata;
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memset(&dbdata, '\0', sizeof dbdata);
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memset(&dbkey, '\0', sizeof dbkey);
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dbkey.data = key->data;
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dbkey.size = key->size;
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dbdata.data = data->data;
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dbdata.size = data->size;
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return db2_error_to_smdb(db->put(db, NULL, &dbkey, &dbdata,
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smdb_put_flags_to_db2_flags(flags)));
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}
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int
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smdb2_set_owner(database, uid, gid)
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SMDB_DATABASE *database;
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uid_t uid;
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gid_t gid;
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{
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# if HASFCHOWN
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int fd;
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int result;
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DB *db = ((SMDB_DB2_DATABASE *) database->smdb_impl)->smdb2_db;
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result = db->fd(db, &fd);
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if (result != 0)
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return result;
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result = fchown(fd, uid, gid);
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if (result < 0)
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return errno;
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# endif /* HASFCHOWN */
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return SMDBE_OK;
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}
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int
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smdb2_sync(database, flags)
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SMDB_DATABASE *database;
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u_int flags;
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{
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DB *db = ((SMDB_DB2_DATABASE *) database->smdb_impl)->smdb2_db;
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return db2_error_to_smdb(db->sync(db, flags));
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}
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int
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smdb2_cursor_close(cursor)
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SMDB_CURSOR *cursor;
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{
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int ret;
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DBC *dbc = (DBC *) cursor->smdbc_impl;
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ret = db2_error_to_smdb(dbc->c_close(dbc));
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free(cursor);
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return ret;
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}
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int
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smdb2_cursor_del(cursor, flags)
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SMDB_CURSOR *cursor;
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SMDB_FLAG flags;
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{
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DBC *dbc = (DBC *) cursor->smdbc_impl;
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return db2_error_to_smdb(dbc->c_del(dbc, 0));
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}
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int
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smdb2_cursor_get(cursor, key, value, flags)
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SMDB_CURSOR *cursor;
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SMDB_DBENT *key;
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SMDB_DBENT *value;
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SMDB_FLAG flags;
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{
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int db2_flags;
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int result;
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DBC *dbc = (DBC *) cursor->smdbc_impl;
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DBT dbkey, dbdata;
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memset(&dbdata, '\0', sizeof dbdata);
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memset(&dbkey, '\0', sizeof dbkey);
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db2_flags = smdb_cursor_get_flags_to_db2(flags);
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result = dbc->c_get(dbc, &dbkey, &dbdata, db2_flags);
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if (result == DB_NOTFOUND)
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return SMDBE_LAST_ENTRY;
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key->data = dbkey.data;
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key->size = dbkey.size;
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value->data = dbdata.data;
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value->size = dbdata.size;
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return db2_error_to_smdb(result);
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}
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int
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smdb2_cursor_put(cursor, key, value, flags)
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SMDB_CURSOR *cursor;
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SMDB_DBENT *key;
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SMDB_DBENT *value;
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SMDB_FLAG flags;
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{
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DBC *dbc = (DBC *) cursor->smdbc_impl;
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DBT dbkey, dbdata;
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memset(&dbdata, '\0', sizeof dbdata);
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memset(&dbkey, '\0', sizeof dbkey);
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dbkey.data = key->data;
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dbkey.size = key->size;
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dbdata.data = value->data;
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dbdata.size = value->size;
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return db2_error_to_smdb(dbc->c_put(dbc, &dbkey, &dbdata, 0));
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}
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int
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smdb2_cursor(database, cursor, flags)
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SMDB_DATABASE *database;
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SMDB_CURSOR **cursor;
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SMDB_FLAG flags;
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{
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int result;
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DB *db = ((SMDB_DB2_DATABASE *) database->smdb_impl)->smdb2_db;
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DBC *db2_cursor;
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# if DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >= 6
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result = db->cursor(db, NULL, &db2_cursor, 0);
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# else /* DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >= 6 */
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result = db->cursor(db, NULL, &db2_cursor);
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# endif /* DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >= 6 */
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if (result != 0)
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return db2_error_to_smdb(result);
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*cursor = (SMDB_CURSOR *) malloc(sizeof(SMDB_CURSOR));
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if (*cursor == NULL)
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return SMDBE_MALLOC;
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(*cursor)->smdbc_close = smdb2_cursor_close;
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(*cursor)->smdbc_del = smdb2_cursor_del;
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(*cursor)->smdbc_get = smdb2_cursor_get;
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(*cursor)->smdbc_put = smdb2_cursor_put;
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(*cursor)->smdbc_impl = db2_cursor;
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return SMDBE_OK;
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}
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# if DB_VERSION_MAJOR == 2
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static int
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smdb_db_open_internal(db_name, db_type, db_flags, db_params, db)
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char *db_name;
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DBTYPE db_type;
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int db_flags;
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SMDB_DBPARAMS *db_params;
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DB **db;
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{
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void *params;
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DB_INFO db_info;
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params = NULL;
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memset(&db_info, '\0', sizeof db_info);
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if (db_params != NULL)
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{
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db_info.db_cachesize = db_params->smdbp_cache_size;
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if (db_type == DB_HASH)
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db_info.h_nelem = db_params->smdbp_num_elements;
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if (db_params->smdbp_allow_dup)
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db_info.flags |= DB_DUP;
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params = &db_info;
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}
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return db_open(db_name, db_type, db_flags, 0644, NULL, params, db);
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}
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# endif /* DB_VERSION_MAJOR == 2 */
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# if DB_VERSION_MAJOR > 2
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static int
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smdb_db_open_internal(db_name, db_type, db_flags, db_params, db)
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char *db_name;
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DBTYPE db_type;
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int db_flags;
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SMDB_DBPARAMS *db_params;
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DB **db;
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{
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int result;
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result = db_create(db, NULL, 0);
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if (result != 0 || *db == NULL)
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return result;
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if (db_params != NULL)
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{
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result = (*db)->set_cachesize(*db, 0,
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db_params->smdbp_cache_size, 0);
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if (result != 0)
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{
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(void) (*db)->close((*db), 0);
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*db = NULL;
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return db2_error_to_smdb(result);
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}
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if (db_type == DB_HASH)
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{
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result = (*db)->set_h_nelem(*db, db_params->smdbp_num_elements);
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if (result != 0)
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{
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(void) (*db)->close(*db, 0);
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*db = NULL;
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return db2_error_to_smdb(result);
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}
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}
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if (db_params->smdbp_allow_dup)
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{
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result = (*db)->set_flags(*db, DB_DUP);
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if (result != 0)
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{
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(void) (*db)->close(*db, 0);
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*db = NULL;
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return db2_error_to_smdb(result);
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}
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}
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}
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result = (*db)->open(*db, db_name, NULL, db_type, db_flags, 0644);
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if (result != 0)
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{
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(void) (*db)->close(*db, 0);
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*db = NULL;
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}
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return db2_error_to_smdb(result);
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}
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# endif /* DB_VERSION_MAJOR > 2 */
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/*
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** SMDB_DB_OPEN -- Opens a db database.
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**
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** Parameters:
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** database -- An unallocated database pointer to a pointer.
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** db_name -- The name of the database without extension.
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** mode -- File permisions for a created database.
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** mode_mask -- Mode bits that must match on an opened database.
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** sff -- Flags for safefile.
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** type -- The type of database to open
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** See smdb_type_to_db2_type for valid types.
|
||
** user_info -- User information for file permissions.
|
||
** db_params --
|
||
** An SMDB_DBPARAMS struct including params. These
|
||
** are processed according to the type of the
|
||
** database. Currently supported params (only for
|
||
** HASH type) are:
|
||
** num_elements
|
||
** cache_size
|
||
**
|
||
** Returns:
|
||
** SMDBE_OK -- Success, other errno:
|
||
** SMDBE_MALLOC -- Cannot allocate memory.
|
||
** SMDBE_BAD_OPEN -- db_open didn't return an error, but
|
||
** somehow the DB pointer is NULL.
|
||
** Anything else: translated error from db2
|
||
*/
|
||
|
||
int
|
||
smdb_db_open(database, db_name, mode, mode_mask, sff, type, user_info, db_params)
|
||
SMDB_DATABASE **database;
|
||
char *db_name;
|
||
int mode;
|
||
int mode_mask;
|
||
long sff;
|
||
SMDB_DBTYPE type;
|
||
SMDB_USER_INFO *user_info;
|
||
SMDB_DBPARAMS *db_params;
|
||
{
|
||
bool lockcreated = FALSE;
|
||
int result;
|
||
int db_flags;
|
||
int lock_fd;
|
||
int db_fd;
|
||
SMDB_DATABASE *smdb_db;
|
||
SMDB_DB2_DATABASE *db2;
|
||
DB *db;
|
||
DBTYPE db_type;
|
||
struct stat stat_info;
|
||
char db_file_name[SMDB_MAX_NAME_LEN];
|
||
|
||
*database = NULL;
|
||
|
||
result = smdb_add_extension(db_file_name, SMDB_MAX_NAME_LEN,
|
||
db_name, SMDB2_FILE_EXTENSION);
|
||
if (result != SMDBE_OK)
|
||
return result;
|
||
|
||
result = smdb_setup_file(db_name, SMDB2_FILE_EXTENSION,
|
||
mode_mask, sff, user_info, &stat_info);
|
||
if (result != SMDBE_OK)
|
||
return result;
|
||
|
||
lock_fd = -1;
|
||
|
||
if (stat_info.st_mode == ST_MODE_NOFILE &&
|
||
bitset(mode, O_CREAT))
|
||
lockcreated = TRUE;
|
||
|
||
result = smdb_lock_file(&lock_fd, db_name, mode, sff,
|
||
SMDB2_FILE_EXTENSION);
|
||
if (result != SMDBE_OK)
|
||
return result;
|
||
|
||
if (lockcreated)
|
||
{
|
||
mode |= O_TRUNC;
|
||
mode &= ~(O_CREAT|O_EXCL);
|
||
}
|
||
|
||
smdb_db = smdb_malloc_database();
|
||
if (smdb_db == NULL)
|
||
return SMDBE_MALLOC;
|
||
|
||
db2 = smdb2_malloc_database();
|
||
if (db2 == NULL)
|
||
return SMDBE_MALLOC;
|
||
|
||
db2->smdb2_lock_fd = lock_fd;
|
||
|
||
db_type = smdb_type_to_db2_type(type);
|
||
|
||
db = NULL;
|
||
|
||
db_flags = 0;
|
||
if (bitset(O_CREAT, mode))
|
||
db_flags |= DB_CREATE;
|
||
if (bitset(O_TRUNC, mode))
|
||
db_flags |= DB_TRUNCATE;
|
||
if (mode == O_RDONLY)
|
||
db_flags |= DB_RDONLY;
|
||
# if !HASFLOCK && defined(DB_FCNTL_LOCKING)
|
||
db_flags |= DB_FCNTL_LOCKING;
|
||
# endif /* !HASFLOCK && defined(DB_FCNTL_LOCKING) */
|
||
|
||
result = smdb_db_open_internal(db_file_name, db_type,
|
||
db_flags, db_params, &db);
|
||
|
||
if (result == 0 && db != NULL)
|
||
{
|
||
result = db->fd(db, &db_fd);
|
||
if (result == 0)
|
||
result = SMDBE_OK;
|
||
}
|
||
else
|
||
{
|
||
/* Try and narrow down on the problem */
|
||
if (result != 0)
|
||
result = db2_error_to_smdb(result);
|
||
else
|
||
result = SMDBE_BAD_OPEN;
|
||
}
|
||
|
||
if (result == SMDBE_OK)
|
||
result = smdb_filechanged(db_name, SMDB2_FILE_EXTENSION, db_fd,
|
||
&stat_info);
|
||
|
||
if (result == SMDBE_OK)
|
||
{
|
||
/* Everything is ok. Setup driver */
|
||
db2->smdb2_db = db;
|
||
|
||
smdb_db->smdb_close = smdb2_close;
|
||
smdb_db->smdb_del = smdb2_del;
|
||
smdb_db->smdb_fd = smdb2_fd;
|
||
smdb_db->smdb_lockfd = smdb2_lockfd;
|
||
smdb_db->smdb_get = smdb2_get;
|
||
smdb_db->smdb_put = smdb2_put;
|
||
smdb_db->smdb_set_owner = smdb2_set_owner;
|
||
smdb_db->smdb_sync = smdb2_sync;
|
||
smdb_db->smdb_cursor = smdb2_cursor;
|
||
smdb_db->smdb_impl = db2;
|
||
|
||
*database = smdb_db;
|
||
|
||
return SMDBE_OK;
|
||
}
|
||
|
||
if (db != NULL)
|
||
db->close(db, 0);
|
||
|
||
smdb_unlock_file(db2->smdb2_lock_fd);
|
||
free(db2);
|
||
smdb_free_database(smdb_db);
|
||
|
||
return result;
|
||
}
|
||
|
||
#endif /* (DB_VERSION_MAJOR >= 2) */
|