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/*
Unix SMB/CIFS implementation.
interface functions for the sam database
Copyright (C) Andrew Tridgell 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
the way that unix fcntl locking works forces us to have a static ldb
handle here rather than a much more sensible approach of having the
ldb handle as part of the samr_Connect() pipe state. Otherwise we
would try to open the ldb more than once, and tdb would rightly
refuse the second open due to the broken nature of unix locking.
*/
static struct ldb_context *sam_db;
/*
connect to the SAM database
return 0 on success, -1 on failure
*/
int samdb_connect(void)
{
if (sam_db != NULL) {
return 0;
}
sam_db = ldb_connect(lp_sam_url(), 0, NULL);
if (sam_db == NULL) {
return -1;
}
return 0;
}
/*
search the sam for the specified attributes - va_list varient
*/
int samdb_search_v(struct ldb_message ***res,
const char * const *attrs,
const char *format,
va_list ap)
{
char *expr = NULL;
int count;
vasprintf(&expr, format, ap);
if (expr == NULL) {
return -1;
}
count = ldb_search(sam_db, NULL, LDB_SCOPE_SUBTREE, expr, attrs, res);
free(expr);
return count;
}
/*
search the sam for the specified attributes - varargs varient
*/
int samdb_search(struct ldb_message ***res,
const char * const *attrs,
const char *format, ...)
{
va_list ap;
int count;
va_start(ap, format);
count = samdb_search_v(res, attrs, format, ap);
va_end(ap);
return count;
}
/*
search the sam for a single string attribute in exactly 1 record
*/
const char *samdb_search_string(TALLOC_CTX *mem_ctx,
const char *attr_name,
const char *format, ...)
{
va_list ap;
int count;
const char * const attrs[2] = { attr_name, NULL };
struct ldb_message **res = NULL;
const char *str = NULL;
va_start(ap, format);
count = samdb_search_v(&res, attrs, format, ap);
va_end(ap);
if (count == 0) {
return NULL;
}
/* make sure its single valued */
if (count != 1 ||
res[0]->num_elements != 1 ||
res[0]->elements[0].num_values != 1 ||
res[0]->elements[0].values[0].data == NULL) {
DEBUG(1,("samdb: search for %s %s not single valued\n",
attr_name, format));
ldb_search_free(sam_db, res);
return NULL;
}
str = talloc_strndup(mem_ctx,
res[0]->elements[0].values[0].data,
res[0]->elements[0].values[0].length);
ldb_search_free(sam_db, res);
return str;
}
/*
search the sam for multipe records each giving a single string attribute
return the number of matches, or -1 on error
*/
int samdb_search_string_multiple(TALLOC_CTX *mem_ctx,
char ***strs,
const char *attr_name,
const char *format, ...)
{
va_list ap;
int count, i;
const char * const attrs[2] = { attr_name, NULL };
struct ldb_message **res = NULL;
va_start(ap, format);
count = samdb_search_v(&res, attrs, format, ap);
va_end(ap);
if (count <= 0) {
return count;
}
/* make sure its single valued */
for (i=0;i<count;i++) {
if (res[i]->num_elements != 1 ||
res[i]->elements[0].num_values != 1 ||
res[i]->elements[0].values[0].data == NULL) {
DEBUG(1,("samdb: search for %s %s not single valued\n",
attr_name, format));
ldb_search_free(sam_db, res);
return -1;
}
}
*strs = talloc_array_p(mem_ctx, char *, count+1);
if (! *strs) {
ldb_search_free(sam_db, res);
return -1;
}
for (i=0;i<count;i++) {
(*strs)[i] = talloc_strndup(mem_ctx,
res[i]->elements[0].values[0].data,
res[i]->elements[0].values[0].length);
}
(*strs)[count] = NULL;
ldb_search_free(sam_db, res);
return count;
}
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