libexec/ypxfr/yp_dbwrite.c

   1 /*
   2  * Copyright (c) 1995
   3  *      Bill Paul <wpaul@ctr.columbia.edu>.  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 Bill Paul.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/libexec/ypxfr/yp_dbwrite.c,v 1.8.2.1 2002/02/15 00:46:54 des Exp $
  33  * $DragonFly: src/libexec/ypxfr/yp_dbwrite.c,v 1.2 2003/06/17 04:27:08 dillon Exp $
  34  */
  35
  36 #include <db.h>
  37 #include <errno.h>
  38 #include <fcntl.h>
  39 #include <limits.h>
  40 #include <paths.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45 #include <sys/stat.h>
  46 #include <rpcsvc/yp.h>
  47 #include "ypxfr_extern.h"
  48
  49 #define PERM_SECURE (S_IRUSR|S_IWUSR)
  50
  51 /*
  52  * Open a DB database read/write
  53  */
  54 DB *
  55 yp_open_db_rw(const char *domain, const char *map, const int flags)
  56 {
  57         DB *dbp;
  58         char buf[1025];
  59
  60
  61         yp_errno = YP_TRUE;
  62
  63         if (map[0] == '.' || strchr(map, '/')) {
  64                 yp_errno = YP_BADARGS;
  65                 return (NULL);
  66         }
  67
  68 #define FLAGS O_RDWR|O_EXLOCK|O_EXCL|O_CREAT
  69
  70         snprintf(buf, sizeof(buf), "%s/%s/%s", yp_dir, domain, map);
  71         dbp = dbopen(buf,flags ? flags : FLAGS,PERM_SECURE,DB_HASH,&openinfo);
  72
  73         if (dbp == NULL) {
  74                 switch (errno) {
  75                 case ENOENT:
  76                         yp_errno = YP_NOMAP;
  77                         break;
  78                 case EFTYPE:
  79                         yp_errno = YP_BADDB;
  80                         break;
  81                 default:
  82                         yp_errno = YP_YPERR;
  83                         break;
  84                 }
  85         }
  86
  87         return (dbp);
  88 }
  89
  90 int
  91 yp_put_record(DB *dbp, DBT *key, DBT *data, int allow_overwrite)
  92 {
  93         int rval;
  94
  95         if ((rval = (dbp->put)(dbp,key,data, allow_overwrite ? 0 :
  96                                                         R_NOOVERWRITE))) {
  97                 switch (rval) {
  98                 case 1:
  99                         return(YP_FALSE);
 100                         break;
 101                 case -1:
 102                 default:
 103                         (void)(dbp->close)(dbp);
 104                         return(YP_BADDB);
 105                         break;
 106                 }
 107         }
 108
 109         return(YP_TRUE);
 110 }