s3-dbwrap: Add dbwrap_record_watch_send/recv

With this API you can asynchronously wait for a record to be modified

1 files changed, 96 insertions, 0 deletions

diff --git a/source3/torture/test_dbwrap_watch.c b/source3/torture/test_dbwrap_watch.c
new file mode 100644
index 0000000000..8011c57951
--- /dev/null
+++ b/source3/torture/test_dbwrap_watch.c
@@ -0,0 +1,96 @@
+/*
+   Unix SMB/CIFS implementation.
+   Test dbwrap_watch API
+   Copyright (C) Volker Lendecke 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 "includes.h"
+#include "torture/proto.h"
+#include "system/filesys.h"
+#include "lib/dbwrap/dbwrap.h"
+#include "lib/dbwrap/dbwrap_open.h"
+#include "lib/dbwrap/dbwrap_watch.h"
+#include "lib/util/util_tdb.h"
+
+bool run_dbwrap_watch1(int dummy)
+{
+	struct tevent_context *ev = NULL;
+	struct messaging_context *msg = NULL;
+	struct db_context *db = NULL;
+	const char *keystr = "key";
+	TDB_DATA key = string_term_tdb_data(keystr);
+	struct db_record *rec = NULL;
+	struct tevent_req *req = NULL;
+	NTSTATUS status;
+	bool ret = false;
+
+	ev = tevent_context_init(talloc_tos());
+	if (ev == NULL) {
+		fprintf(stderr, "tevent_context_init failed\n");
+		goto fail;
+	}
+	msg = messaging_init(ev, ev);
+	if (msg == NULL) {
+		fprintf(stderr, "messaging_init failed\n");
+		goto fail;
+	}
+	db = db_open(msg, "test_watch.tdb", 0, TDB_DEFAULT,
+		     O_CREAT|O_RDWR, 0644, DBWRAP_LOCK_ORDER_1);
+	if (db == NULL) {
+		fprintf(stderr, "db_open failed: %s\n", strerror(errno));
+		goto fail;
+	}
+	dbwrap_watch_db(db, msg);
+	rec = dbwrap_fetch_locked(db, db, key);
+	if (rec == NULL) {
+		fprintf(stderr, "dbwrap_fetch_locked failed\n");
+		goto fail;
+	}
+	req = dbwrap_record_watch_send(talloc_tos(), ev, rec, msg);
+	if (req == NULL) {
+		fprintf(stderr, "dbwrap_record_watch_send failed\n");
+		goto fail;
+	}
+	TALLOC_FREE(rec);
+
+	status = dbwrap_store_int32(db, keystr, 1);
+	if (!NT_STATUS_IS_OK(status)) {
+		fprintf(stderr, "dbwrap_store_int32 failed: %s\n",
+			nt_errstr(status));
+		goto fail;
+	}
+
+	if (!tevent_req_poll(req, ev)) {
+		fprintf(stderr, "tevent_req_poll failed\n");
+		goto fail;
+	}
+
+	status = dbwrap_record_watch_recv(req, talloc_tos(), &rec);
+	if (!NT_STATUS_IS_OK(status)) {
+		fprintf(stderr, "dbwrap_record_watch_recv failed: %s\n",
+			nt_errstr(status));
+		goto fail;
+	}
+
+	ret = true;
+fail:
+	TALLOC_FREE(req);
+	TALLOC_FREE(rec);
+	TALLOC_FREE(db);
+	TALLOC_FREE(msg);
+	TALLOC_FREE(ev);
+	return ret;
+}