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samba-mirror/lib/ldb/tools/ldbedit.c

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/*
ldb database library
Copyright (C) Andrew Tridgell 2004
** 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/>.
*/
/*
* Name: ldb
*
* Component: ldbedit
*
* Description: utility for ldb database editing
*
* Author: Andrew Tridgell
*/
#include "replace.h"
#include "system/filesys.h"
#include "system/time.h"
#include "system/filesys.h"
#include "ldb.h"
#include "tools/cmdline.h"
#include "tools/ldbutil.h"
static struct ldb_cmdline *options;
/*
debug routine
*/
static void ldif_write_msg(struct ldb_context *ldb,
FILE *f,
enum ldb_changetype changetype,
struct ldb_message *msg)
{
struct ldb_ldif ldif;
ldif.changetype = changetype;
ldif.msg = msg;
ldb_ldif_write_file(ldb, f, &ldif);
}
/*
modify a database record so msg1 becomes msg2
returns the number of modified elements
*/
static int modify_record(struct ldb_context *ldb,
struct ldb_message *msg1,
struct ldb_message *msg2,
struct ldb_control **req_ctrls)
{
int ret;
struct ldb_message *mod;
if (ldb_msg_difference(ldb, ldb, msg1, msg2, &mod) != LDB_SUCCESS) {
fprintf(stderr, "Failed to calculate message differences\n");
return -1;
}
ret = mod->num_elements;
if (ret == 0) {
goto done;
}
if (options->verbose > 0) {
ldif_write_msg(ldb, stdout, LDB_CHANGETYPE_MODIFY, mod);
}
if (ldb_modify_ctrl(ldb, mod, req_ctrls) != LDB_SUCCESS) {
fprintf(stderr, "failed to modify %s - %s\n",
ldb_dn_get_linearized(msg1->dn), ldb_errstring(ldb));
ret = -1;
goto done;
}
done:
talloc_free(mod);
return ret;
}
/*
find dn in msgs[]
*/
static struct ldb_message *msg_find(struct ldb_context *ldb,
struct ldb_message **msgs,
unsigned int count,
struct ldb_dn *dn)
{
unsigned int i;
for (i=0;i<count;i++) {
if (ldb_dn_compare(dn, msgs[i]->dn) == 0) {
return msgs[i];
}
}
return NULL;
}
/*
merge the changes in msgs2 into the messages from msgs1
*/
static int merge_edits(struct ldb_context *ldb,
struct ldb_message **msgs1, unsigned int count1,
struct ldb_message **msgs2, unsigned int count2)
{
unsigned int i;
struct ldb_message *msg;
int ret;
unsigned int adds=0, modifies=0, deletes=0;
struct ldb_control **req_ctrls = ldb_parse_control_strings(ldb, ldb, (const char **)options->controls);
if (options->controls != NULL && req_ctrls == NULL) {
fprintf(stderr, "parsing controls failed: %s\n", ldb_errstring(ldb));
return -1;
}
if (ldb_transaction_start(ldb) != LDB_SUCCESS) {
fprintf(stderr, "Failed to start transaction: %s\n", ldb_errstring(ldb));
return -1;
}
/* do the adds and modifies */
for (i=0;i<count2;i++) {
msg = msg_find(ldb, msgs1, count1, msgs2[i]->dn);
if (!msg) {
if (options->verbose > 0) {
ldif_write_msg(ldb, stdout, LDB_CHANGETYPE_ADD, msgs2[i]);
}
if (ldb_add_ctrl(ldb, msgs2[i], req_ctrls) != LDB_SUCCESS) {
fprintf(stderr, "failed to add %s - %s\n",
ldb_dn_get_linearized(msgs2[i]->dn),
ldb_errstring(ldb));
ldb_transaction_cancel(ldb);
return -1;
}
adds++;
} else {
ret = modify_record(ldb, msg, msgs2[i], req_ctrls);
if (ret != -1) {
modifies += (unsigned int) ret;
} else {
ldb_transaction_cancel(ldb);
return -1;
}
}
}
/* do the deletes */
for (i=0;i<count1;i++) {
msg = msg_find(ldb, msgs2, count2, msgs1[i]->dn);
if (!msg) {
if (options->verbose > 0) {
ldif_write_msg(ldb, stdout, LDB_CHANGETYPE_DELETE, msgs1[i]);
}
if (ldb_delete_ctrl(ldb, msgs1[i]->dn, req_ctrls) != LDB_SUCCESS) {
fprintf(stderr, "failed to delete %s - %s\n",
ldb_dn_get_linearized(msgs1[i]->dn),
ldb_errstring(ldb));
ldb_transaction_cancel(ldb);
return -1;
}
deletes++;
}
}
if (ldb_transaction_commit(ldb) != LDB_SUCCESS) {
fprintf(stderr, "Failed to commit transaction: %s\n", ldb_errstring(ldb));
return -1;
}
printf("# %u adds %u modifies %u deletes\n", adds, modifies, deletes);
return 0;
}
/*
save a set of messages as ldif to a file
*/
static int save_ldif(struct ldb_context *ldb,
FILE *f, struct ldb_message **msgs, unsigned int count)
{
unsigned int i;
fprintf(f, "# editing %u records\n", count);
for (i=0;i<count;i++) {
struct ldb_ldif ldif;
fprintf(f, "# record %u\n", i+1);
ldif.changetype = LDB_CHANGETYPE_NONE;
ldif.msg = msgs[i];
ldb_ldif_write_file(ldb, f, &ldif);
}
return 0;
}
/*
edit the ldb search results in msgs using the user selected editor
*/
static int do_edit(struct ldb_context *ldb, struct ldb_message **msgs1,
unsigned int count1, const char *editor)
{
int fd, ret;
FILE *f;
char file_template[] = "/tmp/ldbedit.XXXXXX";
char *cmd;
struct ldb_ldif *ldif;
struct ldb_message **msgs2 = NULL;
unsigned int count2 = 0;
/* write out the original set of messages to a temporary
file */
fd = mkstemp(file_template);
if (fd == -1) {
perror(file_template);
return -1;
}
f = fdopen(fd, "r+");
if (!f) {
perror("fopen");
close(fd);
unlink(file_template);
return -1;
}
if (save_ldif(ldb, f, msgs1, count1) != 0) {
return -1;
}
fclose(f);
cmd = talloc_asprintf(ldb, "%s %s", editor, file_template);
if (!cmd) {
unlink(file_template);
fprintf(stderr, "out of memory\n");
return -1;
}
/* run the editor */
ret = system(cmd);
talloc_free(cmd);
if (ret != 0) {
unlink(file_template);
fprintf(stderr, "edit with %s failed\n", editor);
return -1;
}
/* read the resulting ldif into msgs2 */
f = fopen(file_template, "r");
if (!f) {
perror(file_template);
return -1;
}
while ((ldif = ldb_ldif_read_file(ldb, f))) {
msgs2 = talloc_realloc(ldb, msgs2, struct ldb_message *, count2+1);
if (!msgs2) {
fprintf(stderr, "out of memory");
return -1;
}
msgs2[count2++] = ldif->msg;
}
/* the feof() test works here, even for the last line of the
* file, as we parse ldif files character by character, and
* feof() is only true if we have failed to read a character
* from the file. So if the last line is bad, we don't get
* feof() set, so we know the record was bad. Only if we
* attempt to go to the next record will we get feof() and
* thus consider that the ldif has ended without errors
*/
if (!feof(f)) {
fprintf(stderr, "Error parsing ldif - aborting\n");
fclose(f);
unlink(file_template);
return -1;
}
fclose(f);
unlink(file_template);
return merge_edits(ldb, msgs1, count1, msgs2, count2);
}
static void usage(struct ldb_context *ldb)
{
printf("Usage: ldbedit <options> <expression> <attributes ...>\n");
ldb_cmdline_help(ldb, "ldbedit", stdout);
exit(LDB_ERR_OPERATIONS_ERROR);
}
int main(int argc, const char **argv)
{
struct ldb_context *ldb;
struct ldb_result *result = NULL;
struct ldb_dn *basedn = NULL;
int ret;
const char *expression = "(|(objectClass=*)(distinguishedName=*))";
const char * const * attrs = NULL;
TALLOC_CTX *mem_ctx = talloc_new(NULL);
struct ldb_control **req_ctrls;
unsigned int i;
ldb = ldb_init(mem_ctx, NULL);
if (ldb == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
options = ldb_cmdline_process_edit(ldb, argc, argv, usage);
/* the check for '=' is for compatibility with ldapsearch */
if (options->argc > 0 &&
strchr(options->argv[0], '=')) {
expression = options->argv[0];
options->argv++;
options->argc--;
}
if (options->argc > 0) {
attrs = (const char * const *)(options->argv);
}
if (options->basedn != NULL) {
basedn = ldb_dn_new(ldb, ldb, options->basedn);
if (basedn == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
}
for (i = 0; options->controls != NULL && options->controls[i] != NULL; i++) {
if (strncmp(options->controls[i], "reveal_internals:", 17) == 0) {
printf("Using reveal internals has unintended consequences.\n");
printf("If this is your intent, manually perform the search,"
" and use ldbmodify directly.\n");
return LDB_ERR_OPERATIONS_ERROR;
}
}
req_ctrls = ldb_parse_control_strings(ldb, ldb, (const char **)options->controls);
if (options->controls != NULL && req_ctrls== NULL) {
printf("parsing controls failed: %s\n", ldb_errstring(ldb));
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_search_ctrl(ldb, ldb, &result, basedn, options->scope, attrs, req_ctrls, "%s", expression);
if (ret != LDB_SUCCESS) {
printf("search failed - %s\n", ldb_errstring(ldb));
return ret;
}
if (result->count == 0) {
printf("no matching records - cannot edit\n");
talloc_free(mem_ctx);
return LDB_SUCCESS;
}
ret = do_edit(ldb, result->msgs, result->count, options->editor);
talloc_free(mem_ctx);
return ret == 0 ? LDB_SUCCESS : LDB_ERR_OPERATIONS_ERROR;
}