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/*
Unix SMB/CIFS implementation.
simple ldb tdb dump util
Copyright (C) Andrew Tridgell 2001
Copyright (C) Andrew Bartlett 2012
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "system/locale.h"
#include "system/time.h"
#include "system/filesys.h"
#include "system/wait.h"
#include <tdb.h>
#include <ldb.h>
#include <ldb_private.h>
static struct ldb_context *ldb;
bool show_index = false;
bool validate_contents = false;
static int traverse_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA _dbuf, void *state)
{
int ret, i, j;
struct ldb_dn *dn = state;
struct ldb_message *msg = talloc_zero(NULL, struct ldb_message);
struct ldb_val dbuf = {
.data = _dbuf.dptr,
.length = _dbuf.dsize,
};
struct ldb_ldif ldif = {
.msg = msg,
.changetype = LDB_CHANGETYPE_NONE
};
if (!msg) {
return -1;
}
ret = ldb_unpack_data(ldb, &dbuf, msg);
if (ret != 0) {
fprintf(stderr, "Failed to parse record %*.*s as an LDB record\n", (int)key.dsize, (int)key.dsize, (char *)key.dptr);
TALLOC_FREE(msg);
return 0;
}
if (dn && ldb_dn_compare(msg->dn, dn) != 0) {
TALLOC_FREE(msg);
return 0;
}
if (!show_index && ldb_dn_is_special(msg->dn)) {
const char *dn_lin = ldb_dn_get_linearized(msg->dn);
if ((strcmp(dn_lin, "@BASEINFO") == 0) || (strncmp(dn_lin, "@INDEX:", strlen("@INDEX:")) == 0)) {
/*
the user has asked not to show index
records. Also exclude BASEINFO as it
contains meta-data which will be re-created
if this database is restored
*/
TALLOC_FREE(msg);
return 0;
}
}
if (!validate_contents || ldb_dn_is_special(msg->dn)) {
ldb_ldif_write_file(ldb, stdout, &ldif);
TALLOC_FREE(msg);
return 0;
}
for (i=0;i<msg->num_elements;i++) {
const struct ldb_schema_attribute *a;
a = ldb_schema_attribute_by_name(ldb, msg->elements[i].name);
for (j=0;j<msg->elements[i].num_values;j++) {
struct ldb_val v;
ret = a->syntax->ldif_write_fn(ldb, msg, &msg->elements[i].values[j], &v);
if (ret != 0) {
v = msg->elements[i].values[j];
if (ldb_should_b64_encode(ldb, &v)) {
v.data = (uint8_t *)ldb_base64_encode(ldb, (char *)v.data, v.length);
v.length = strlen((char *)v.data);
}
fprintf(stderr, "On %s element %s value %d (%*.*s) failed to convert to LDIF correctly, skipping possibly corrupt record\n",
ldb_dn_get_linearized(msg->dn),
msg->elements[i].name,
j, (int)v.length, (int)v.length,
v.data);
TALLOC_FREE(msg);
return 0;
}
}
}
ldb_ldif_write_file(ldb, stdout, &ldif);
TALLOC_FREE(msg);
return 0;
}
static void log_stderr(struct tdb_context *tdb, enum tdb_debug_level level,
const char *fmt, ...)
{
va_list ap;
const char *name = tdb_name(tdb);
const char *prefix = "";
if (!name)
name = "unnamed";
switch (level) {
case TDB_DEBUG_ERROR:
prefix = "ERROR: ";
break;
case TDB_DEBUG_WARNING:
prefix = "WARNING: ";
break;
case TDB_DEBUG_TRACE:
return;
default:
case TDB_DEBUG_FATAL:
prefix = "FATAL: ";
break;
}
va_start(ap, fmt);
fprintf(stderr, "tdb(%s): %s", name, prefix);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
static void emergency_walk(TDB_DATA key, TDB_DATA dbuf, void *keyname)
{
traverse_fn(NULL, key, dbuf, keyname);
}
static int dump_tdb(const char *fname, struct ldb_dn *dn, bool emergency)
{
TDB_CONTEXT *tdb;
struct tdb_logging_context logfn = { log_stderr };
tdb = tdb_open_ex(fname, 0, 0, O_RDONLY, 0, &logfn, NULL);
if (!tdb) {
fprintf(stderr, "Failed to open %s\n", fname);
return 1;
}
if (emergency) {
return tdb_rescue(tdb, emergency_walk, dn) == 0;
}
return tdb_traverse(tdb, traverse_fn, dn) == -1 ? 1 : 0;
}
static void usage( void)
{
printf( "Usage: ldbdump [options] <filename>\n\n");
printf( " -h this help message\n");
printf( " -d DN dumps DN only\n");
printf( " -e emergency dump, for corrupt databases\n");
printf( " -i include index and @BASEINFO records in dump\n");
printf( " -c validate contents of the records\n");
}
int main(int argc, char *argv[])
{
bool emergency = false;
int c, rc;
char *fname;
struct ldb_dn *dn = NULL;
ldb = ldb_init(NULL, NULL);
if (ldb == NULL) {
fprintf(stderr, "ldb: ldb_init failed()");
exit(1);
}
rc = ldb_modules_hook(ldb, LDB_MODULE_HOOK_CMDLINE_PRECONNECT);
if (rc != LDB_SUCCESS) {
fprintf(stderr, "ldb: failed to run preconnect hooks (needed to get Samba LDIF handlers): %s\n", ldb_strerror(rc));
exit(1);
}
if (argc < 2) {
printf("Usage: ldbdump <fname>\n");
exit(1);
}
while ((c = getopt( argc, argv, "hd:ec")) != -1) {
switch (c) {
case 'h':
usage();
exit( 0);
case 'd':
dn = ldb_dn_new(ldb, ldb, optarg);
if (!dn) {
fprintf(stderr, "ldb failed to parse %s as a DN\n", optarg);
exit(1);
}
break;
case 'e':
emergency = true;
break;
case 'i':
show_index = true;
break;
case 'c':
validate_contents = true;
break;
default:
usage();
exit( 1);
}
}
fname = argv[optind];
return dump_tdb(fname, dn, emergency);
}
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