1 /*
2 example code for the ldb database library
3
4 Copyright (C) Brad Hards (bradh@frogmouth.net) 2005-2006
5
6 ** NOTE! The following LGPL license applies to the ldb
7 ** library. This does NOT imply that all of Samba is released
8 ** under the LGPL
9
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.
14
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.
19
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/>.
22 */
23
24 /** \example ldifreader.c
25
26 The code below shows a simple LDB application.
27
28 It lists / dumps the entries in an LDIF file to standard output.
29
30 */
31
32 #include "ldb.h"
33
34 /*
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).
39 */
vprintf_fn(void * private_data,const char * fmt,...)40 static int vprintf_fn(void *private_data, const char *fmt, ...)
41 {
42 int retval;
43 va_list ap;
44
45 va_start(ap, fmt);
46 /* We just write to standard output */
47 retval = vprintf(fmt, ap);
48 va_end(ap);
49 /* Note that the function should return the number of
50 bytes written, or a negative error code */
51 return retval;
52 }
53
main(int argc,const char ** argv)54 int main(int argc, const char **argv)
55 {
56 struct ldb_context *ldb;
57 FILE *fileStream;
58 struct ldb_ldif *ldifMsg;
59
60 if (argc != 2) {
61 printf("Usage %s filename.ldif\n", argv[0]);
62 exit(1);
63 }
64
65 /*
66 This is the always the first thing you want to do in an LDB
67 application - initialise up the context structure.
68
69 Note that you can use the context structure as a parent
70 for talloc allocations as well
71 */
72 ldb = ldb_init(NULL, NULL);
73
74 fileStream = fopen(argv[1], "r");
75 if (0 == fileStream) {
76 perror(argv[1]);
77 exit(1);
78 }
79
80 /*
81 We now work through the filestream to get each entry.
82 */
83 while ( (ldifMsg = ldb_ldif_read_file(ldb, fileStream)) ) {
84 /*
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).
89 */
90 switch (ldifMsg->changetype) {
91 case LDB_CHANGETYPE_NONE:
92 printf("ChangeType: None\n");
93 break;
94 case LDB_CHANGETYPE_ADD:
95 printf("ChangeType: Add\n");
96 break;
97 case LDB_CHANGETYPE_MODIFY:
98 printf("ChangeType: Modify\n");
99 break;
100 case LDB_CHANGETYPE_DELETE:
101 printf("ChangeType: Delete\n");
102 break;
103 default:
104 printf("ChangeType: Unknown\n");
105 }
106
107 /*
108 We can now write out the results, using our custom
109 output routine as defined at the top of this file.
110 */
111 ldb_ldif_write(ldb, vprintf_fn, NULL, ldifMsg);
112
113 /*
114 Clean up the message
115 */
116 ldb_ldif_read_free(ldb, ldifMsg);
117 }
118
119 /*
120 Clean up the context
121 */
122 talloc_free(ldb);
123
124 return 0;
125 }
126