2 example code for the ldb database library
4 Copyright (C) Brad Hards (bradh@frogmouth.net) 2005-2006
6 ** NOTE! The following LGPL license applies to the ldb
7 ** library. This does NOT imply that all of Samba is released
10 This library is free software; you can redistribute it and/or
11 modify it under the terms of the GNU Lesser General Public
12 License as published by the Free Software Foundation; either
13 version 3 of the License, or (at your option) any later version.
15 This library is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public
21 License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 /** \example ldifreader.c
26 The code below shows a simple LDB application.
28 It lists / dumps the entries in an LDIF file to standard output.
32 #include "ldb_includes.h"
34 #include "ldb_errors.h"
37 ldb_ldif_write takes a function pointer to a custom output
38 function. This version is about as simple as the output function can
39 be. In a more complex example, you'd likely be doing something with
40 the private data function (e.g. holding a file handle).
42 static int vprintf_fn(void *private_data, const char *fmt, ...)
48 /* We just write to standard output */
49 retval = vprintf(fmt, ap);
51 /* Note that the function should return the number of
52 bytes written, or a negative error code */
56 int main(int argc, const char **argv)
58 struct ldb_context *ldb;
60 struct ldb_ldif *ldifMsg;
63 printf("Usage %s filename.ldif\n", argv[0]);
68 This is the always the first thing you want to do in an LDB
69 application - initialise up the context structure.
71 Note that you can use the context structure as a parent
72 for talloc allocations as well
74 ldb = ldb_init(NULL, NULL);
76 fileStream = fopen(argv[1], "r");
77 if (0 == fileStream) {
83 We now work through the filestream to get each entry.
85 while ( (ldifMsg = ldb_ldif_read_file(ldb, fileStream)) ) {
87 Each message has a particular change type. For Add,
88 Modify and Delete, this will also appear in the
89 output listing (as changetype: add, changetype:
90 modify or changetype:delete, respectively).
92 switch (ldifMsg->changetype) {
93 case LDB_CHANGETYPE_NONE:
94 printf("ChangeType: None\n");
96 case LDB_CHANGETYPE_ADD:
97 printf("ChangeType: Add\n");
99 case LDB_CHANGETYPE_MODIFY:
100 printf("ChangeType: Modify\n");
102 case LDB_CHANGETYPE_DELETE:
103 printf("ChangeType: Delete\n");
106 printf("ChangeType: Unknown\n");
110 We can now write out the results, using our custom
111 output routine as defined at the top of this file.
113 ldb_ldif_write(ldb, vprintf_fn, NULL, ldifMsg);
118 ldb_ldif_read_free(ldb, ldifMsg);