db/db/db-fbsd.c

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)db.c        8.4 (Berkeley) 2/21/94";
  36 #endif /* LIBC_SCCS and not lint */
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD: src/lib/libc/db/db/db.c,v 1.2 2002/03/22 21:52:01 obrien Exp $");
  39
  40 #include <sys/types.h>
  41
  42 #include <errno.h>
  43 #include <fcntl.h>
  44 #include <stddef.h>
  45 #include <stdio.h>
  46
  47 #include <db.h>
  48
  49 DB *
  50 dbopen(fname, flags, mode, type, openinfo)
  51         const char *fname;
  52         int flags, mode;
  53         DBTYPE type;
  54         const void *openinfo;
  55 {
  56
  57 #define DB_FLAGS        (DB_LOCK | DB_SHMEM | DB_TXN)
  58 #define USE_OPEN_FLAGS                                                  \
  59         (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY |          \
  60          O_RDWR | O_SHLOCK | O_TRUNC)
  61
  62         if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
  63                 switch (type) {
  64                 case DB_BTREE:
  65                         return (__bt_open(fname, flags & USE_OPEN_FLAGS,
  66                             mode, openinfo, flags & DB_FLAGS));
  67                 case DB_HASH:
  68                         return (__hash_open(fname, flags & USE_OPEN_FLAGS,
  69                             mode, openinfo, flags & DB_FLAGS));
  70                 case DB_RECNO:
  71                         return (__rec_open(fname, flags & USE_OPEN_FLAGS,
  72                             mode, openinfo, flags & DB_FLAGS));
  73                 }
  74         errno = EINVAL;
  75         return (NULL);
  76 }
  77
  78 static int
  79 __dberr()
  80 {
  81         return (RET_ERROR);
  82 }
  83
  84 /*
  85  * __DBPANIC -- Stop.
  86  *
  87  * Parameters:
  88  *      dbp:    pointer to the DB structure.
  89  */
  90 void
  91 __dbpanic(dbp)
  92         DB *dbp;
  93 {
  94         /* The only thing that can succeed is a close. */
  95         dbp->del = (int (*)())__dberr;
  96         dbp->fd = (int (*)())__dberr;
  97         dbp->get = (int (*)())__dberr;
  98         dbp->put = (int (*)())__dberr;
  99         dbp->seq = (int (*)())__dberr;
 100         dbp->sync = (int (*)())__dberr;
 101 }