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8420a36dc7
Signed-off-by: Andrew Tridgell <tridge@samba.org>
123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
/*
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example code for the ldb database library
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Copyright (C) Brad Hards (bradh@frogmouth.net) 2005-2006
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** NOTE! The following LGPL license applies to the ldb
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** library. This does NOT imply that all of Samba is released
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** under the LGPL
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/** \example ldbreader.c
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The code below shows a simple LDB application.
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It lists / dumps the records in a LDB database to standard output.
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*/
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#include "ldb.h"
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/*
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ldb_ldif_write takes a function pointer to a custom output
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function. This version is about as simple as the output function can
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be. In a more complex example, you'd likely be doing something with
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the private data function (e.g. holding a file handle).
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*/
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static int vprintf_fn(void *private_data, const char *fmt, ...)
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{
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int retval;
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va_list ap;
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va_start(ap, fmt);
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/* We just write to standard output */
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retval = vprintf(fmt, ap);
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va_end(ap);
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/* Note that the function should return the number of
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bytes written, or a negative error code */
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return retval;
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}
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int main(int argc, const char **argv)
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{
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struct ldb_context *ldb;
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const char *expression = "(dn=*)";
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struct ldb_result *resultMsg;
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int i;
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/*
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This is the always the first thing you want to do in an LDB
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application - initialise up the context structure.
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Note that you can use the context structure as a parent
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for talloc allocations as well
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*/
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ldb = ldb_init(NULL, NULL);
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/*
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We now open the database. In this example we just hard code the connection path.
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Also note that the database is being opened read-only. This means that the
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call will fail unless the database already exists.
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*/
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if (LDB_SUCCESS != ldb_connect(ldb, "tdb://tdbtest.ldb", LDB_FLG_RDONLY, NULL) ){
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printf("Problem on connection\n");
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exit(-1);
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}
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/*
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At this stage we have an open database, and can start using it. It is opened
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read-only, so a query is possible.
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We construct a search that just returns all the (sensible) contents. You can do
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quite fine grained results with the LDAP search syntax, however it is a bit
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confusing to start with. See RFC2254.
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*/
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if (LDB_SUCCESS != ldb_search(ldb, ldb, &resultMsg,
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NULL, LDB_SCOPE_DEFAULT, NULL,
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"%s", expression)) {
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printf("Problem in search\n");
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exit(-1);
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}
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printf("%i records returned\n", resultMsg->count);
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/*
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We can now iterate through the results, writing them out
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(to standard output) with our custom output routine as defined
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at the top of this file
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*/
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for (i = 0; i < resultMsg->count; ++i) {
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struct ldb_ldif ldifMsg;
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printf("Message: %i\n", i+1);
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ldifMsg.changetype = LDB_CHANGETYPE_NONE;
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ldifMsg.msg = resultMsg->msgs[i];
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ldb_ldif_write(ldb, vprintf_fn, NULL, &ldifMsg);
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}
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/*
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There are two objects to clean up - the result from the
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ldb_search() query, and the original ldb context.
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*/
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talloc_free(resultMsg);
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talloc_free(ldb);
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return 0;
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}
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