| 1 | /**********************************************************************
|
|---|
| 2 | *
|
|---|
| 3 | * tdbdel -- remove a single value from the TDB database
|
|---|
| 4 | *
|
|---|
| 5 | * A component of the Greenstone digital library software
|
|---|
| 6 | * from the New Zealand Digital Library Project at the
|
|---|
| 7 | * University of Waikato, New Zealand.
|
|---|
| 8 | *
|
|---|
| 9 | * Copyright (C) 2011 The New Zealand Digital Library Project
|
|---|
| 10 | *
|
|---|
| 11 | * This program is free software; you can redistribute it and/or modify
|
|---|
| 12 | * it under the terms of the GNU General Public License as published by
|
|---|
| 13 | * the Free Software Foundation; either version 2 of the License, or
|
|---|
| 14 | * (at your option) any later version.
|
|---|
| 15 | *
|
|---|
| 16 | * This program is distributed in the hope that it will be useful,
|
|---|
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 19 | * GNU General Public License for more details.
|
|---|
| 20 | *
|
|---|
| 21 | * You should have received a copy of the GNU General Public License
|
|---|
| 22 | * along with this program; if not, write to the Free Software
|
|---|
| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|---|
| 24 | *
|
|---|
| 25 | *********************************************************************/
|
|---|
| 26 |
|
|---|
| 27 | #if defined(GSDL_USE_OBJECTSPACE)
|
|---|
| 28 | #include <ospace\std\iostream>
|
|---|
| 29 | #elif defined(GSDL_USE_IOS_H)
|
|---|
| 30 | #include <iostream.h>
|
|---|
| 31 | #else
|
|---|
| 32 | #include <iostream>
|
|---|
| 33 | #endif
|
|---|
| 34 |
|
|---|
| 35 | #include <fcntl.h>
|
|---|
| 36 | #include "tdb.h"
|
|---|
| 37 |
|
|---|
| 38 | // use the standard namespace
|
|---|
| 39 | #if !defined (GSDL_NAMESPACE_BROKEN)
|
|---|
| 40 | #if defined(GSDL_USE_OBJECTSPACE)
|
|---|
| 41 | using namespace ospace::std;
|
|---|
| 42 | #else
|
|---|
| 43 | using namespace std;
|
|---|
| 44 | #endif
|
|---|
| 45 | #endif
|
|---|
| 46 |
|
|---|
| 47 | /**
|
|---|
| 48 | */
|
|---|
| 49 | void
|
|---|
| 50 | printUsage (char *program_name)
|
|---|
| 51 | {
|
|---|
| 52 | cerr << "usage: " << program_name << " <database_path> <key>" << endl;
|
|---|
| 53 | cerr << endl;
|
|---|
| 54 | }
|
|---|
| 55 | /** printUsage() **/
|
|---|
| 56 |
|
|---|
| 57 | /**
|
|---|
| 58 | */
|
|---|
| 59 | int
|
|---|
| 60 | main (int argc, char *argv[])
|
|---|
| 61 | {
|
|---|
| 62 | // sanity check
|
|---|
| 63 | if (argc != 3)
|
|---|
| 64 | {
|
|---|
| 65 | printUsage(argv[0]);
|
|---|
| 66 | exit (-1);
|
|---|
| 67 | }
|
|---|
| 68 |
|
|---|
| 69 | char *dbname = argv[1];
|
|---|
| 70 |
|
|---|
| 71 | int hash_size = 0;
|
|---|
| 72 | int tdb_flags = TDB_DEFAULT; // Default = 0
|
|---|
| 73 | int open_flags = O_RDWR;
|
|---|
| 74 | TDB_CONTEXT *tdb = tdb_open(dbname, hash_size, tdb_flags, open_flags, 0664);
|
|---|
| 75 | if (!tdb)
|
|---|
| 76 | {
|
|---|
| 77 | cerr << "couldn't create " << dbname << endl;
|
|---|
| 78 | exit (0);
|
|---|
| 79 | }
|
|---|
| 80 |
|
|---|
| 81 | TDB_DATA key;
|
|---|
| 82 | key.dsize = strlen(argv[2]);
|
|---|
| 83 | key.dptr = (unsigned char*)argv[2];
|
|---|
| 84 |
|
|---|
| 85 | int status = tdb_delete (tdb, key);
|
|---|
| 86 |
|
|---|
| 87 | // status:
|
|---|
| 88 | // 0 == delete OK
|
|---|
| 89 | // -1 == key does not exist or there was an error
|
|---|
| 90 |
|
|---|
| 91 | if (status < 0)
|
|---|
| 92 | {
|
|---|
| 93 | cerr << "Opened database " << argv[1] << endl;
|
|---|
| 94 | cerr << " but couldn't delete: " << argv[2] << endl;
|
|---|
| 95 | }
|
|---|
| 96 |
|
|---|
| 97 | tdb_close (tdb);
|
|---|
| 98 |
|
|---|
| 99 | return status;
|
|---|
| 100 | }
|
|---|
| 101 | /** main() **/
|
|---|
| 102 |
|
|---|
