s3-iremotewinspool: startup server depending on OSbuildnumber indicating PSS 4.0
[gd/samba/.git] / file_server / file_server.c
1 /*
2    Unix SMB/CIFS implementation.
3
4    run s3 file server within Samba4
5
6    Copyright (C) Andrew Tridgell        2011
7
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 3 of the License, or
11    (at your option) any later version.
12
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "talloc.h"
24 #include "tevent.h"
25 #include "system/filesys.h"
26 #include "lib/param/param.h"
27 #include "source4/samba/service.h"
28 #include "source4/samba/process_model.h"
29 #include "dynconfig.h"
30 #include "nsswitch/winbind_client.h"
31
32 /*
33   called if smbd exits
34  */
35 static void file_server_smbd_done(struct tevent_req *subreq)
36 {
37         struct task_server *task =
38                 tevent_req_callback_data(subreq,
39                 struct task_server);
40         int sys_errno;
41         int ret;
42
43         ret = samba_runcmd_recv(subreq, &sys_errno);
44         if (ret != 0) {
45                 DEBUG(0,("file_server smbd daemon died with exit status %d\n", sys_errno));
46         } else {
47                 DEBUG(0,("file_server smbd daemon exited normally\n"));
48         }
49         task_server_terminate(task, "smbd child process exited", true);
50 }
51
52
53 /*
54   startup a copy of smbd as a child daemon
55 */
56 static NTSTATUS s3fs_task_init(struct task_server *task)
57 {
58         struct tevent_req *subreq;
59         const char *smbd_path;
60         const char *smbd_cmd[2] = { NULL, NULL };
61         const char *config_file = "";
62
63         task_server_set_title(task, "task[s3fs_parent]");
64
65         smbd_path = talloc_asprintf(task, "%s/smbd", dyn_SBINDIR);
66         if (smbd_path == NULL) {
67                 return NT_STATUS_NO_MEMORY;
68         }
69         smbd_cmd[0] = smbd_path;
70
71         if (!is_default_dyn_CONFIGFILE()) {
72                 config_file = talloc_asprintf(task,
73                                               "--configfile=%s",
74                                               get_dyn_CONFIGFILE());
75                 if (config_file == NULL) {
76                         return NT_STATUS_NO_MEMORY;
77                 }
78         }
79
80         /* the child should be able to call through nss_winbind */
81         (void)winbind_on();
82         /* start it as a child process */
83         subreq = samba_runcmd_send(task, task->event_ctx, timeval_zero(), 1, 0,
84                                 smbd_cmd,
85                                 "-D",
86                                 "--option=server role check:inhibit=yes",
87                                 "--foreground",
88                                 config_file,
89                                 debug_get_output_is_stdout()?"--debug-stdout":NULL,
90                                 NULL);
91         /* the parent should not be able to call through nss_winbind */
92         if (!winbind_off()) {
93                 DEBUG(0,("Failed to re-disable recursive winbindd calls after forking smbd\n"));
94                 task_server_terminate(task, "Failed to re-disable recursive winbindd calls", true);
95                 return NT_STATUS_UNSUCCESSFUL;
96         }
97         if (subreq == NULL) {
98                 DEBUG(0, ("Failed to start smbd as child daemon\n"));
99                 task_server_terminate(task, "Failed to startup s3fs smb task", true);
100                 return NT_STATUS_UNSUCCESSFUL;
101         }
102
103         tevent_req_set_callback(subreq, file_server_smbd_done, task);
104
105         DEBUG(5,("Started file server child smbd\n"));
106
107         return NT_STATUS_OK;
108 }
109
110 /* called at smbd startup - register ourselves as a server service */
111 NTSTATUS server_service_s3fs_init(TALLOC_CTX *);
112
113 NTSTATUS server_service_s3fs_init(TALLOC_CTX *ctx)
114 {
115         struct service_details details = {
116                 .inhibit_fork_on_accept = true,
117                 .inhibit_pre_fork = true,
118                 .task_init = s3fs_task_init,
119                 .post_fork = NULL
120         };
121         return register_server_service(ctx, "s3fs", &details);
122 }