source3/printing/spoolssd.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    SPOOLSS Daemon
   4    Copyright (C) Simo Sorce 2010
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include "includes.h"
  20 #include "librpc/gen_ndr/messaging.h"
  21 #include "include/printing.h"
  22 #include "rpc_server/rpc_server.h"
  23
  24 #define SPOOLSS_PIPE_NAME "spoolss"
  25
  26
  27 static void spoolss_reopen_logs(void)
  28 {
  29         char *lfile = NULL;
  30         int ret;
  31
  32         ret = asprintf(&lfile, "%s.spoolssd", lp_logfile());
  33         if (ret > 0) {
  34                 lp_set_logfile(lfile);
  35                 SAFE_FREE(lfile);
  36         }
  37         reopen_logs();
  38 }
  39
  40 static void smb_conf_updated(struct messaging_context *msg,
  41                              void *private_data,
  42                              uint32_t msg_type,
  43                              struct server_id server_id,
  44                              DATA_BLOB *data)
  45 {
  46         DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
  47         change_to_root_user();
  48         reload_printers(msg);
  49         spoolss_reopen_logs();
  50 }
  51
  52 void start_spoolssd(void)
  53 {
  54         pid_t pid;
  55         NTSTATUS status;
  56         int ret;
  57
  58         DEBUG(1, ("Forking SPOOLSS Daemon\n"));
  59
  60         pid = sys_fork();
  61
  62         if (pid == -1) {
  63                 DEBUG(0, ("Failed to fork SPOOLSS [%s], aborting ...\n",
  64                            strerror(errno)));
  65                 exit(1);
  66         }
  67
  68         if (pid) {
  69                 /* parent */
  70                 return;
  71         }
  72
  73         /* child */
  74         close_low_fds(false);
  75
  76         status = reinit_after_fork(server_messaging_context(),
  77                                    server_event_context(),
  78                                    procid_self(), true);
  79         if (!NT_STATUS_IS_OK(status)) {
  80                 DEBUG(0,("reinit_after_fork() failed\n"));
  81                 smb_panic("reinit_after_fork() failed");
  82         }
  83
  84         spoolss_reopen_logs();
  85
  86         smbd_setup_sig_term_handler();
  87         smbd_setup_sig_hup_handler();
  88
  89         if (!serverid_register(procid_self(),
  90                                 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
  91                                 |FLAG_MSG_PRINT_GENERAL)) {
  92                 exit(1);
  93         }
  94
  95         if (!locking_init()) {
  96                 exit(1);
  97         }
  98
  99         messaging_register(server_messaging_context(), NULL,
 100                            MSG_PRINTER_UPDATE, print_queue_receive);
 101         messaging_register(server_messaging_context(), NULL,
 102                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 103
 104         if (!setup_named_pipe_socket(SPOOLSS_PIPE_NAME, server_event_context())) {
 105                 exit(1);
 106         }
 107
 108         /* loop forever */
 109         ret = tevent_loop_wait(server_event_context());
 110
 111         /* should not be reached */
 112         DEBUG(0,("background_queue: tevent_loop_wait() exited with %d - %s\n",
 113                  ret, (ret == 0) ? "out of events" : strerror(errno)));
 114         exit(1);
 115 }