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.
35
ldb_ldif_write takes a function pointer to a custom output
36
function. This version is about as simple as the output function can
37
be. In a more complex example, you'd likely be doing something with
38
the private data function (e.g. holding a file handle).
40
static int vprintf_fn(void *private_data, const char *fmt, ...)
46
/* We just write to standard output */
47
retval = vprintf(fmt, ap);
49
/* Note that the function should return the number of
50
bytes written, or a negative error code */
54
int main(int argc, const char **argv)
56
struct ldb_context *ldb;
58
struct ldb_ldif *ldifMsg;
61
printf("Usage %s filename.ldif\n", argv[0]);
66
This is the always the first thing you want to do in an LDB
67
application - initialise up the context structure.
69
Note that you can use the context structure as a parent
70
for talloc allocations as well
72
ldb = ldb_init(NULL, NULL);
74
fileStream = fopen(argv[1], "r");
75
if (0 == fileStream) {
81
We now work through the filestream to get each entry.
83
while ( (ldifMsg = ldb_ldif_read_file(ldb, fileStream)) ) {
85
Each message has a particular change type. For Add,
86
Modify and Delete, this will also appear in the
87
output listing (as changetype: add, changetype:
88
modify or changetype:delete, respectively).
90
switch (ldifMsg->changetype) {
91
case LDB_CHANGETYPE_NONE:
92
printf("ChangeType: None\n");
94
case LDB_CHANGETYPE_ADD:
95
printf("ChangeType: Add\n");
97
case LDB_CHANGETYPE_MODIFY:
98
printf("ChangeType: Modify\n");
100
case LDB_CHANGETYPE_DELETE:
101
printf("ChangeType: Delete\n");
104
printf("ChangeType: Unknown\n");
108
We can now write out the results, using our custom
109
output routine as defined at the top of this file.
111
ldb_ldif_write(ldb, vprintf_fn, NULL, ldifMsg);
116
ldb_ldif_read_free(ldb, ldifMsg);