## root/libdb/db.c(48.html)

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## DEFINITIONS

This source file includes following definitions.

1. dbopen
2. __dberr
3. __dbpanic

    /*-
     * Copyright (c) 1991, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * 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.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
     */

    #if defined(LIBC_SCCS) && !defined(lint)
    static char sccsid[] = "@(#)db.c        8.4 (Berkeley) 2/21/94";
    #endif /* LIBC_SCCS and not lint */

    #ifdef HAVE_CONFIG_H
    #include <config.h>
    #endif
    #include <sys/types.h>

    #include <errno.h>
    #include <fcntl.h>
    #include <stddef.h>
    #include <stdio.h>

    #include "db.h"

    DB *
    dbopen(fname, flags, mode, type, openinfo)
            const char *fname;
            int flags, mode;
            DBTYPE type;
            const void *openinfo;
    {

    #define DB_FLAGS        (DB_LOCK | DB_SHMEM | DB_TXN)
    #define USE_OPEN_FLAGS                                                  \
            (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY |          \
             O_RDWR | O_SHLOCK | O_TRUNC)

            if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
                    switch (type) {
                    case DB_BTREE:
                            return (__bt_open(fname, (flags & USE_OPEN_FLAGS) | O_BINARY,
                                mode, openinfo, flags & DB_FLAGS));
                    /*
                    case DB_HASH:
                            return (__hash_open(fname, (flags & USE_OPEN_FLAGS) | O_BINARY,
                                mode, openinfo, flags & DB_FLAGS));
                    case DB_RECNO:
                            return (__rec_open(fname, (flags & USE_OPEN_FLAGS) | O_BINARY,
                                mode, openinfo, flags & DB_FLAGS));
                    */
                    }
            errno = EINVAL;
            return (NULL);
    }

    static int
    __dberr()
    {
            return (RET_ERROR);
    }

    /*
     * __DBPANIC -- Stop.
     *
     * Parameters:
     *      dbp:    pointer to the DB structure.
     */
    void
    __dbpanic(dbp)
            DB *dbp;
    {
            /* The only thing that can succeed is a close. */
            dbp->del = (int (*)())__dberr;
            dbp->fd = (int (*)())__dberr;
            dbp->get = (int (*)())__dberr;
            dbp->put = (int (*)())__dberr;
            dbp->seq = (int (*)())__dberr;
            dbp->sync = (int (*)())__dberr;
    }

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