winbind: Allow winbindd to be run from inside "samba"

Change-Id: I6b90a9b62ba5821e0feedb23cd20642078ba0ca6
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Kamen Mazdrashki <kamenim@samba.org>

Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Apr 29 05:28:39 CEST 2014 on sn-devel-104

2 files changed, 102 insertions, 0 deletions

diff --git a/source4/winbind/winbindd.c b/source4/winbind/winbindd.c
new file mode 100644
index 00000000000..f702739d215
--- /dev/null
+++ b/source4/winbind/winbindd.c
@@ -0,0 +1,94 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   run s3 winbindd server within Samba4
+
+   Copyright (C) Andrew Tridgell	2011
+   Copyright (C) Andrew Bartlett	2014
+
+   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 "talloc.h"
+#include "tevent.h"
+#include "system/filesys.h"
+#include "lib/param/param.h"
+#include "source4/smbd/service.h"
+#include "source4/smbd/process_model.h"
+#include "file_server/file_server.h"
+#include "dynconfig.h"
+#include "nsswitch/winbind_client.h"
+
+/*
+  called if winbindd exits
+ */
+static void winbindd_done(struct tevent_req *subreq)
+{
+	struct task_server *task =
+		tevent_req_callback_data(subreq,
+		struct task_server);
+	int sys_errno;
+	int ret;
+
+	ret = samba_runcmd_recv(subreq, &sys_errno);
+	if (ret != 0) {
+		DEBUG(0,("winbindd daemon died with exit status %d\n", sys_errno));
+	} else {
+		DEBUG(0,("winbindd daemon exited normally\n"));
+	}
+	task_server_terminate(task, "winbindd child process exited", true);
+}
+
+
+/*
+  startup a copy of winbindd as a child daemon
+*/
+static void winbindd_task_init(struct task_server *task)
+{
+	struct tevent_req *subreq;
+	const char *winbindd_path;
+	const char *winbindd_cmd[2] = { NULL, NULL };
+
+	task_server_set_title(task, "task[winbindd_parent]");
+
+	winbindd_path = talloc_asprintf(task, "%s/winbindd", dyn_SBINDIR);
+	winbindd_cmd[0] = winbindd_path;
+
+	/* start it as a child process */
+	subreq = samba_runcmd_send(task, task->event_ctx, timeval_zero(), 1, 0,
+				winbindd_cmd,
+				"-D",
+				"--option=server role check:inhibit=yes",
+				"--foreground",
+				debug_get_output_is_stdout()?"--stdout":NULL,
+				NULL);
+	if (subreq == NULL) {
+		DEBUG(0, ("Failed to start winbindd as child daemon\n"));
+		task_server_terminate(task, "Failed to startup winbindd task", true);
+		return;
+	}
+
+	tevent_req_set_callback(subreq, winbindd_done, task);
+
+	DEBUG(5,("Started file server child winbindd\n"));
+}
+
+/* called at winbindd startup - register ourselves as a server service */
+NTSTATUS server_service_winbindd_init(void);
+
+NTSTATUS server_service_winbindd_init(void)
+{
+	return register_server_service("winbindd", winbindd_task_init);
+}
diff --git a/source4/winbind/wscript_build b/source4/winbind/wscript_build
index 5ba9c2ae0f9..e6710ceb2e3 100644
--- a/source4/winbind/wscript_build
+++ b/source4/winbind/wscript_build
@@ -10,6 +10,14 @@ bld.SAMBA_MODULE('service_winbind',
 	internal_module=False,
 	)
 
+bld.SAMBA_MODULE('service_winbindd',
+	source='winbindd.c',
+	subsystem='service',
+	init_function='server_service_winbindd_init',
+	deps='process_model UTIL_RUNCMD',
+	internal_module=False,
+	)
+
 
 bld.SAMBA_SUBSYSTEM('WB_HELPER',
 	source='wb_async_helpers.c wb_utils.c',