root/libdb/db.c

/* */

DEFINITIONS

1. dbopen
2. __dberr
3. __dbpanic

   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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 static char sccsid[] = "@(#)db.c        8.4 (Berkeley) 2/21/94";
  32 #endif /* LIBC_SCCS and not lint */
  33 
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37 #include <sys/types.h>
  38 
  39 #include <errno.h>
  40 #include <fcntl.h>
  41 #include <stddef.h>
  42 #include <stdio.h>
  43 
  44 #include "db.h"
  45 
  46 DB *
  47 dbopen(fname, flags, mode, type, openinfo)
  48         const char *fname;
  49         int flags, mode;
  50         DBTYPE type;
  51         const void *openinfo;
  52 {
  53 
  54 #define DB_FLAGS        (DB_LOCK | DB_SHMEM | DB_TXN)
  55 #define USE_OPEN_FLAGS                                                  \
  56         (O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY |          \
  57          O_RDWR | O_SHLOCK | O_TRUNC)
  58 
  59         if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
  60                 switch (type) {
  61                 case DB_BTREE:
  62                         return (__bt_open(fname, (flags & USE_OPEN_FLAGS) | O_BINARY,
  63                             mode, openinfo, flags & DB_FLAGS));
  64                 /*
  65                 case DB_HASH:
  66                         return (__hash_open(fname, (flags & USE_OPEN_FLAGS) | O_BINARY,
  67                             mode, openinfo, flags & DB_FLAGS));
  68                 case DB_RECNO:
  69                         return (__rec_open(fname, (flags & USE_OPEN_FLAGS) | O_BINARY,
  70                             mode, openinfo, flags & DB_FLAGS));
  71                 */
  72                 }
  73         errno = EINVAL;
  74         return (NULL);
  75 }
  76 
  77 static int
  78 __dberr(void)
  79 {
  80         return (RET_ERROR);
  81 }
  82 
  83 /**
  84  * __DBPANIC -- Stop.
  85  *
  86  *      @param dbp      pointer to the #DB structure.
  87  */
  88 void
  89 __dbpanic(dbp)
  90         DB *dbp;
  91 {
  92         /* The only thing that can succeed is a close. */
  93         dbp->del = (int (*)())__dberr;
  94         dbp->fd = (int (*)())__dberr;
  95         dbp->get = (int (*)())__dberr;
  96         dbp->put = (int (*)())__dberr;
  97         dbp->seq = (int (*)())__dberr;
  98         dbp->sync = (int (*)())__dberr;
  99 }

/* */