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/*
example code for the ldb database library
Copyright (C) Brad Hards (bradh@frogmouth.net) 2005-2006
** NOTE! The following LGPL license applies to the ldb
** library. This does NOT imply that all of Samba is released
** under the LGPL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/** \example ldbreader.c
The code below shows a simple LDB application.
It lists / dumps the records in a LDB database to standard output.
*/
#include "ldb.h"
/*
ldb_ldif_write takes a function pointer to a custom output
function. This version is about as simple as the output function can
be. In a more complex example, you'd likely be doing something with
the private data function (e.g. holding a file handle).
*/
static int vprintf_fn(void *private_data, const char *fmt, ...)
{
int retval;
va_list ap;
va_start(ap, fmt);
/* We just write to standard output */
retval = vprintf(fmt, ap);
va_end(ap);
/* Note that the function should return the number of
bytes written, or a negative error code */
return retval;
}
int main(int argc, const char **argv)
{
struct ldb_context *ldb;
const char *expression = "(dn=*)";
struct ldb_result *resultMsg;
int i;
/*
This is the always the first thing you want to do in an LDB
application - initialise up the context structure.
Note that you can use the context structure as a parent
for talloc allocations as well
*/
ldb = ldb_init(NULL, NULL);
/*
We now open the database. In this example we just hard code the connection path.
Also note that the database is being opened read-only. This means that the
call will fail unless the database already exists.
*/
if (LDB_SUCCESS != ldb_connect(ldb, "tdb://tdbtest.ldb", LDB_FLG_RDONLY, NULL) ){
printf("Problem on connection\n");
exit(-1);
}
/*
At this stage we have an open database, and can start using it. It is opened
read-only, so a query is possible.
We construct a search that just returns all the (sensible) contents. You can do
quite fine grained results with the LDAP search syntax, however it is a bit
confusing to start with. See RFC2254.
*/
if (LDB_SUCCESS != ldb_search(ldb, ldb, &resultMsg,
NULL, LDB_SCOPE_DEFAULT, NULL,
"%s", expression)) {
printf("Problem in search\n");
exit(-1);
}
printf("%i records returned\n", resultMsg->count);
/*
We can now iterate through the results, writing them out
(to standard output) with our custom output routine as defined
at the top of this file
*/
for (i = 0; i < resultMsg->count; ++i) {
struct ldb_ldif ldifMsg;
printf("Message: %i\n", i+1);
ldifMsg.changetype = LDB_CHANGETYPE_NONE;
ldifMsg.msg = resultMsg->msgs[i];
ldb_ldif_write(ldb, vprintf_fn, NULL, &ldifMsg);
}
/*
There are two objects to clean up - the result from the
ldb_search() query, and the original ldb context.
*/
talloc_free(resultMsg);
talloc_free(ldb);
return 0;
}
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