source3/printing/spoolssd.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    SPOOLSS Daemon
   4    Copyright (C) Simo Sorce <idra@samba.org> 2010-2011
   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 "smbd/smbd.h"
  21
  22 #include "messages.h"
  23 #include "include/printing.h"
  24 #include "printing/nt_printing_migrate_internal.h"
  25 #include "printing/queue_process.h"
  26 #include "printing/pcap.h"
  27 #include "printing/load.h"
  28 #include "ntdomain.h"
  29 #include "librpc/gen_ndr/srv_winreg.h"
  30 #include "librpc/gen_ndr/srv_spoolss.h"
  31 #include "rpc_server/rpc_server.h"
  32 #include "rpc_server/rpc_ep_register.h"
  33 #include "rpc_server/rpc_config.h"
  34 #include "rpc_server/spoolss/srv_spoolss_nt.h"
  35 #include "librpc/rpc/dcerpc_ep.h"
  36 #include "lib/server_prefork.h"
  37 #include "lib/server_prefork_util.h"
  38
  39 #define SPOOLSS_PIPE_NAME "spoolss"
  40 #define DAEMON_NAME "spoolssd"
  41
  42 static struct server_id parent_id;
  43 static struct prefork_pool *spoolss_pool = NULL;
  44 static int spoolss_child_id = 0;
  45
  46 static struct pf_daemon_config default_pf_spoolss_cfg = {
  47         .prefork_status = PFH_INIT,
  48         .min_children = 5,
  49         .max_children = 25,
  50         .spawn_rate = 5,
  51         .max_allowed_clients = 100,
  52         .child_min_life = 60 /* 1 minute minimum life time */
  53 };
  54 static struct pf_daemon_config pf_spoolss_cfg = { 0 };
  55
  56 pid_t start_spoolssd(struct tevent_context *ev_ctx,
  57                      struct messaging_context *msg_ctx);
  58
  59 static void spoolss_reopen_logs(int child_id)
  60 {
  61         char *lfile = lp_logfile(talloc_tos());
  62         char *ext;
  63         int rc;
  64
  65         if (child_id) {
  66                 rc = asprintf(&ext, "%s.%d", DAEMON_NAME, child_id);
  67         } else {
  68                 rc = asprintf(&ext, "%s", DAEMON_NAME);
  69         }
  70
  71         if (rc == -1) {
  72                 return;
  73         }
  74
  75         rc = 0;
  76         if (lfile == NULL || lfile[0] == '\0') {
  77                 rc = asprintf(&lfile, "%s/log.%s",
  78                               get_dyn_LOGFILEBASE(), ext);
  79         } else {
  80                 if (strstr(lfile, ext) == NULL) {
  81                         if (child_id) {
  82                                 rc = asprintf(&lfile, "%s.%d",
  83                                               lp_logfile(talloc_tos()),
  84                                               child_id);
  85                         } else {
  86                                 rc = asprintf(&lfile, "%s.%s",
  87                                               lp_logfile(talloc_tos()),
  88                                               ext);
  89                         }
  90                 }
  91         }
  92
  93         if (rc > 0) {
  94                 lp_set_logfile(lfile);
  95                 SAFE_FREE(lfile);
  96         }
  97
  98         SAFE_FREE(ext);
  99
 100         reopen_logs();
 101 }
 102
 103 static void update_conf(struct tevent_context *ev,
 104                         struct messaging_context *msg)
 105 {
 106         change_to_root_user();
 107         lp_load_global(get_dyn_CONFIGFILE());
 108         load_printers();
 109
 110         spoolss_reopen_logs(spoolss_child_id);
 111         if (spoolss_child_id == 0) {
 112                 pfh_daemon_config(DAEMON_NAME,
 113                                   &pf_spoolss_cfg,
 114                                   &default_pf_spoolss_cfg);
 115                 pfh_manage_pool(ev, msg, &pf_spoolss_cfg, spoolss_pool);
 116         }
 117 }
 118
 119 static void smb_conf_updated(struct messaging_context *msg,
 120                              void *private_data,
 121                              uint32_t msg_type,
 122                              struct server_id server_id,
 123                              DATA_BLOB *data)
 124 {
 125         struct tevent_context *ev_ctx = talloc_get_type_abort(private_data,
 126                                                              struct tevent_context);
 127
 128         DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
 129         update_conf(ev_ctx, msg);
 130 }
 131
 132 static void spoolss_sig_term_handler(struct tevent_context *ev,
 133                                      struct tevent_signal *se,
 134                                      int signum,
 135                                      int count,
 136                                      void *siginfo,
 137                                      void *private_data)
 138 {
 139         exit_server_cleanly("termination signal");
 140 }
 141
 142 static void spoolss_setup_sig_term_handler(struct tevent_context *ev_ctx)
 143 {
 144         struct tevent_signal *se;
 145
 146         se = tevent_add_signal(ev_ctx,
 147                                ev_ctx,
 148                                SIGTERM, 0,
 149                                spoolss_sig_term_handler,
 150                                NULL);
 151         if (!se) {
 152                 exit_server("failed to setup SIGTERM handler");
 153         }
 154 }
 155
 156 static void spoolss_sig_hup_handler(struct tevent_context *ev,
 157                                     struct tevent_signal *se,
 158                                     int signum,
 159                                     int count,
 160                                     void *siginfo,
 161                                     void *pvt)
 162 {
 163         struct messaging_context *msg_ctx;
 164
 165         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 166
 167         DEBUG(1,("Reloading printers after SIGHUP\n"));
 168         update_conf(ev, msg_ctx);
 169
 170         /* relay to all children */
 171         if (spoolss_pool) {
 172                 prefork_send_signal_to_all(spoolss_pool, SIGHUP);
 173         }
 174 }
 175
 176 static void spoolss_setup_sig_hup_handler(struct tevent_context *ev_ctx,
 177                                           struct messaging_context *msg_ctx)
 178 {
 179         struct tevent_signal *se;
 180
 181         se = tevent_add_signal(ev_ctx,
 182                                ev_ctx,
 183                                SIGHUP, 0,
 184                                spoolss_sig_hup_handler,
 185                                msg_ctx);
 186         if (!se) {
 187                 exit_server("failed to setup SIGHUP handler");
 188         }
 189 }
 190
 191 static bool spoolss_init_cb(void *ptr)
 192 {
 193         struct messaging_context *msg_ctx = talloc_get_type_abort(
 194                 ptr, struct messaging_context);
 195
 196         return nt_printing_tdb_migrate(msg_ctx);
 197 }
 198
 199 static bool spoolss_shutdown_cb(void *ptr)
 200 {
 201         srv_spoolss_cleanup();
 202
 203         return true;
 204 }
 205
 206 /* Children */
 207
 208 static void spoolss_chld_sig_hup_handler(struct tevent_context *ev,
 209                                          struct tevent_signal *se,
 210                                          int signum,
 211                                          int count,
 212                                          void *siginfo,
 213                                          void *pvt)
 214 {
 215         change_to_root_user();
 216         DEBUG(1,("Reloading printers after SIGHUP\n"));
 217         load_printers();
 218         spoolss_reopen_logs(spoolss_child_id);
 219 }
 220
 221 static bool spoolss_setup_chld_hup_handler(struct tevent_context *ev_ctx,
 222                                            struct messaging_context *msg_ctx,
 223                                            struct pf_worker_data *pf)
 224 {
 225         struct tevent_signal *se;
 226
 227         se = tevent_add_signal(ev_ctx,
 228                                ev_ctx,
 229                                SIGHUP, 0,
 230                                spoolss_chld_sig_hup_handler,
 231                                msg_ctx);
 232         if (!se) {
 233                 DEBUG(1, ("failed to setup SIGHUP handler"));
 234                 return false;
 235         }
 236
 237         return true;
 238 }
 239
 240 static void parent_ping(struct messaging_context *msg_ctx,
 241                         void *private_data,
 242                         uint32_t msg_type,
 243                         struct server_id server_id,
 244                         DATA_BLOB *data)
 245 {
 246
 247         /* The fact we received this message is enough to let make the event
 248          * loop if it was idle. spoolss_children_main will cycle through
 249          * spoolss_next_client at least once. That function will take whatever
 250          * action is necessary */
 251
 252         DEBUG(10, ("Got message that the parent changed status.\n"));
 253         return;
 254 }
 255
 256 static bool spoolss_child_init(struct tevent_context *ev_ctx,
 257                                int child_id, struct pf_worker_data *pf)
 258 {
 259         NTSTATUS status;
 260         struct rpc_srv_callbacks spoolss_cb;
 261         struct messaging_context *msg_ctx = server_messaging_context();
 262         bool ok;
 263
 264         status = reinit_after_fork(msg_ctx, ev_ctx, true, "spoolssd-child");
 265         if (!NT_STATUS_IS_OK(status)) {
 266                 DEBUG(0,("reinit_after_fork() failed\n"));
 267                 smb_panic("reinit_after_fork() failed");
 268         }
 269
 270         spoolss_child_id = child_id;
 271         spoolss_reopen_logs(child_id);
 272
 273         ok = spoolss_setup_chld_hup_handler(ev_ctx, msg_ctx, pf);
 274         if (!ok) {
 275                 return false;
 276         }
 277
 278         if (!locking_init()) {
 279                 return false;
 280         }
 281
 282         messaging_register(msg_ctx, ev_ctx,
 283                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 284         messaging_register(msg_ctx, ev_ctx,
 285                            MSG_PREFORK_PARENT_EVENT, parent_ping);
 286
 287         /* As soon as messaging is up check if pcap has been loaded already.
 288          * If so then we probably missed a message and should load_printers()
 289          * ourselves. If pcap has not been loaded yet, then ignore, we will get
 290          * a message as soon as the bq process completes the reload. */
 291         if (pcap_cache_loaded(NULL)) {
 292                 load_printers();
 293         }
 294
 295         /* try to reinit rpc queues */
 296         spoolss_cb.init = spoolss_init_cb;
 297         spoolss_cb.shutdown = spoolss_shutdown_cb;
 298         spoolss_cb.private_data = msg_ctx;
 299
 300         status = rpc_winreg_init(NULL);
 301         if (!NT_STATUS_IS_OK(status)) {
 302                 DEBUG(0, ("Failed to register winreg rpc interface! (%s)\n",
 303                           nt_errstr(status)));
 304                 return false;
 305         }
 306
 307         status = rpc_spoolss_init(&spoolss_cb);
 308         if (!NT_STATUS_IS_OK(status)) {
 309                 DEBUG(0, ("Failed to register spoolss rpc interface! (%s)\n",
 310                           nt_errstr(status)));
 311                 return false;
 312         }
 313
 314         return true;
 315 }
 316
 317 struct spoolss_children_data {
 318         struct tevent_context *ev_ctx;
 319         struct messaging_context *msg_ctx;
 320         struct pf_worker_data *pf;
 321         int listen_fd_size;
 322         int *listen_fds;
 323 };
 324
 325 static void spoolss_next_client(void *pvt);
 326
 327 static int spoolss_children_main(struct tevent_context *ev_ctx,
 328                                  struct messaging_context *msg_ctx,
 329                                  struct pf_worker_data *pf,
 330                                  int child_id,
 331                                  int listen_fd_size,
 332                                  int *listen_fds,
 333                                  void *private_data)
 334 {
 335         struct spoolss_children_data *data;
 336         bool ok;
 337         int ret = 0;
 338
 339         ok = spoolss_child_init(ev_ctx, child_id, pf);
 340         if (!ok) {
 341                 return 1;
 342         }
 343
 344         data = talloc(ev_ctx, struct spoolss_children_data);
 345         if (!data) {
 346                 return 1;
 347         }
 348         data->pf = pf;
 349         data->ev_ctx = ev_ctx;
 350         data->msg_ctx = msg_ctx;
 351         data->listen_fd_size = listen_fd_size;
 352         data->listen_fds = listen_fds;
 353
 354         /* loop until it is time to exit */
 355         while (pf->status != PF_WORKER_EXITING) {
 356                 /* try to see if it is time to schedule the next client */
 357                 spoolss_next_client(data);
 358
 359                 ret = tevent_loop_once(ev_ctx);
 360                 if (ret != 0) {
 361                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 362                                   ret, strerror(errno)));
 363                         pf->status = PF_WORKER_EXITING;
 364                 }
 365         }
 366
 367         return ret;
 368 }
 369
 370 static void spoolss_client_terminated(void *pvt)
 371 {
 372         struct spoolss_children_data *data;
 373
 374         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 375
 376         pfh_client_terminated(data->pf);
 377
 378         spoolss_next_client(pvt);
 379 }
 380
 381 struct spoolss_new_client {
 382         struct spoolss_children_data *data;
 383         struct tsocket_address *srv_addr;
 384         struct tsocket_address *cli_addr;
 385 };
 386
 387 static void spoolss_handle_client(struct tevent_req *req);
 388
 389 static void spoolss_next_client(void *pvt)
 390 {
 391         struct tevent_req *req;
 392         struct spoolss_children_data *data;
 393         struct spoolss_new_client *next;
 394
 395         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 396
 397         if (!pfh_child_allowed_to_accept(data->pf)) {
 398                 /* nothing to do for now we are already listening
 399                  * or we are not allowed to listen further */
 400                 return;
 401         }
 402
 403         next = talloc_zero(data, struct spoolss_new_client);
 404         if (!next) {
 405                 DEBUG(1, ("Out of memory!?\n"));
 406                 return;
 407         }
 408         next->data = data;
 409
 410         req = prefork_listen_send(next, data->ev_ctx, data->pf,
 411                                   data->listen_fd_size,
 412                                   data->listen_fds);
 413         if (!req) {
 414                 DEBUG(1, ("Failed to make listening request!?\n"));
 415                 talloc_free(next);
 416                 return;
 417         }
 418         tevent_req_set_callback(req, spoolss_handle_client, next);
 419 }
 420
 421 static void spoolss_handle_client(struct tevent_req *req)
 422 {
 423         struct spoolss_children_data *data;
 424         struct spoolss_new_client *client;
 425         const DATA_BLOB ping = data_blob_null;
 426         int ret;
 427         int sd;
 428
 429         client = tevent_req_callback_data(req, struct spoolss_new_client);
 430         data = client->data;
 431
 432         ret = prefork_listen_recv(req, client, &sd,
 433                                   &client->srv_addr, &client->cli_addr);
 434
 435         /* this will free the request too */
 436         talloc_free(client);
 437
 438         if (ret != 0) {
 439                 DEBUG(6, ("No client connection was available after all!\n"));
 440                 return;
 441         }
 442
 443         /* Warn parent that our status changed */
 444         messaging_send(data->msg_ctx, parent_id,
 445                         MSG_PREFORK_CHILD_EVENT, &ping);
 446
 447         DEBUG(2, ("Spoolss preforked child %d got client connection!\n",
 448                   (int)(data->pf->pid)));
 449
 450         named_pipe_accept_function(data->ev_ctx, data->msg_ctx,
 451                                    SPOOLSS_PIPE_NAME, sd,
 452                                    spoolss_client_terminated, data);
 453 }
 454
 455 /* ==== Main Process Functions ==== */
 456
 457 extern pid_t background_lpq_updater_pid;
 458 static char *bq_logfile;
 459
 460 static void check_updater_child(struct tevent_context *ev_ctx,
 461                                 struct messaging_context *msg_ctx)
 462 {
 463         int status;
 464         pid_t pid;
 465
 466         if (background_lpq_updater_pid == -1) {
 467                 return;
 468         }
 469
 470         pid = waitpid(background_lpq_updater_pid, &status, WNOHANG);
 471         if (pid > 0) {
 472                 DEBUG(2, ("The background queue child died... Restarting!\n"));
 473                 pid = start_background_queue(ev_ctx, msg_ctx, bq_logfile);
 474                 background_lpq_updater_pid = pid;
 475         }
 476 }
 477
 478 static void child_ping(struct messaging_context *msg_ctx,
 479                         void *private_data,
 480                         uint32_t msg_type,
 481                         struct server_id server_id,
 482                         DATA_BLOB *data)
 483 {
 484         struct tevent_context *ev_ctx;
 485
 486         ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
 487
 488         DEBUG(10, ("Got message that a child changed status.\n"));
 489         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 490 }
 491
 492 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 493                                     struct messaging_context *msg_ctx,
 494                                     struct timeval current_time);
 495 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 496                                     struct tevent_timer *te,
 497                                     struct timeval current_time,
 498                                     void *pvt);
 499
 500 static void spoolssd_sigchld_handler(struct tevent_context *ev_ctx,
 501                                      struct prefork_pool *pfp,
 502                                      void *pvt)
 503 {
 504         struct messaging_context *msg_ctx;
 505
 506         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 507
 508         /* run pool management so we can fork/retire or increase
 509          * the allowed connections per child based on load */
 510         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 511
 512         /* also check if the updater child is alive and well */
 513         check_updater_child(ev_ctx, msg_ctx);
 514 }
 515
 516 static bool spoolssd_setup_children_monitor(struct tevent_context *ev_ctx,
 517                                             struct messaging_context *msg_ctx)
 518 {
 519         bool ok;
 520
 521         /* add our oun sigchld callback */
 522         prefork_set_sigchld_callback(spoolss_pool,
 523                                      spoolssd_sigchld_handler, msg_ctx);
 524
 525         ok = spoolssd_schedule_check(ev_ctx, msg_ctx,
 526                                      tevent_timeval_current());
 527         return ok;
 528 }
 529
 530 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 531                                     struct messaging_context *msg_ctx,
 532                                     struct timeval current_time)
 533 {
 534         struct tevent_timer *te;
 535         struct timeval next_event;
 536
 537         /* check situation again in 10 seconds */
 538         next_event = tevent_timeval_current_ofs(10, 0);
 539
 540         /* TODO: check when the socket becomes readable, so that children
 541          * are checked only when there is some activity ? */
 542         te = tevent_add_timer(ev_ctx, spoolss_pool, next_event,
 543                                 spoolssd_check_children, msg_ctx);
 544         if (!te) {
 545                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 546                 return false;
 547         }
 548
 549         return true;
 550 }
 551
 552 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 553                                     struct tevent_timer *te,
 554                                     struct timeval current_time,
 555                                     void *pvt)
 556 {
 557         struct messaging_context *msg_ctx;
 558
 559         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 560
 561         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 562
 563         spoolssd_schedule_check(ev_ctx, msg_ctx, current_time);
 564 }
 565
 566 static void print_queue_forward(struct messaging_context *msg,
 567                                 void *private_data,
 568                                 uint32_t msg_type,
 569                                 struct server_id server_id,
 570                                 DATA_BLOB *data)
 571 {
 572         messaging_send_buf(msg, pid_to_procid(background_lpq_updater_pid),
 573                            MSG_PRINTER_UPDATE, data->data, data->length);
 574 }
 575
 576 static char *get_bq_logfile(void)
 577 {
 578         char *lfile = lp_logfile(talloc_tos());
 579         int rc;
 580
 581         if (lfile == NULL || lfile[0] == '\0') {
 582                 rc = asprintf(&lfile, "%s/log.%s.bq",
 583                                         get_dyn_LOGFILEBASE(), DAEMON_NAME);
 584         } else {
 585                 rc = asprintf(&lfile, "%s.bq", lp_logfile(talloc_tos()));
 586         }
 587         if (rc == -1) {
 588                 lfile = NULL;
 589         }
 590         return lfile;
 591 }
 592
 593 pid_t start_spoolssd(struct tevent_context *ev_ctx,
 594                     struct messaging_context *msg_ctx)
 595 {
 596         enum rpc_service_mode_e epm_mode = rpc_epmapper_mode();
 597         struct rpc_srv_callbacks spoolss_cb;
 598         struct dcerpc_binding_vector *v;
 599         TALLOC_CTX *mem_ctx;
 600         pid_t pid;
 601         NTSTATUS status;
 602         int listen_fd;
 603         int ret;
 604         bool ok;
 605
 606         DEBUG(1, ("Forking SPOOLSS Daemon\n"));
 607
 608         /*
 609          * Block signals before forking child as it will have to
 610          * set its own handlers. Child will re-enable SIGHUP as
 611          * soon as the handlers are set up.
 612          */
 613         BlockSignals(true, SIGTERM);
 614         BlockSignals(true, SIGHUP);
 615
 616         pid = fork();
 617
 618         if (pid == -1) {
 619                 DEBUG(0, ("Failed to fork SPOOLSS [%s]\n",
 620                            strerror(errno)));
 621         }
 622
 623         /* parent or error */
 624         if (pid != 0) {
 625
 626                 /* Re-enable SIGHUP before returnig */
 627                 BlockSignals(false, SIGTERM);
 628                 BlockSignals(false, SIGHUP);
 629                 return pid;
 630         }
 631
 632         status = smbd_reinit_after_fork(msg_ctx, ev_ctx, true,
 633                                         "spoolssd-master");
 634         if (!NT_STATUS_IS_OK(status)) {
 635                 DEBUG(0,("reinit_after_fork() failed\n"));
 636                 smb_panic("reinit_after_fork() failed");
 637         }
 638
 639         /* save the parent process id so the children can use it later */
 640         parent_id = messaging_server_id(msg_ctx);
 641
 642         spoolss_reopen_logs(0);
 643         pfh_daemon_config(DAEMON_NAME,
 644                           &pf_spoolss_cfg,
 645                           &default_pf_spoolss_cfg);
 646
 647         spoolss_setup_sig_term_handler(ev_ctx);
 648         spoolss_setup_sig_hup_handler(ev_ctx, msg_ctx);
 649
 650         BlockSignals(false, SIGTERM);
 651         BlockSignals(false, SIGHUP);
 652
 653         /* always start the backgroundqueue listner in spoolssd */
 654         bq_logfile = get_bq_logfile();
 655         pid = start_background_queue(ev_ctx, msg_ctx, bq_logfile);
 656         if (pid > 0) {
 657                 background_lpq_updater_pid = pid;
 658         }
 659
 660         /* the listening fd must be created before the children are actually
 661          * forked out. */
 662         listen_fd = create_named_pipe_socket(SPOOLSS_PIPE_NAME);
 663         if (listen_fd == -1) {
 664                 exit(1);
 665         }
 666
 667         ret = listen(listen_fd, pf_spoolss_cfg.max_allowed_clients);
 668         if (ret == -1) {
 669                 DEBUG(0, ("Failed to listen on spoolss pipe - %s\n",
 670                           strerror(errno)));
 671                 exit(1);
 672         }
 673
 674         /* start children before any more initialization is done */
 675         ok = prefork_create_pool(ev_ctx, /* mem_ctx */
 676                                  ev_ctx, msg_ctx,
 677                                  1, &listen_fd,
 678                                  pf_spoolss_cfg.min_children,
 679                                  pf_spoolss_cfg.max_children,
 680                                  &spoolss_children_main, NULL,
 681                                  &spoolss_pool);
 682         if (!ok) {
 683                 exit(1);
 684         }
 685
 686         if (!locking_init()) {
 687                 exit(1);
 688         }
 689
 690         messaging_register(msg_ctx, ev_ctx,
 691                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 692         messaging_register(msg_ctx, NULL, MSG_PRINTER_UPDATE,
 693                            print_queue_forward);
 694         messaging_register(msg_ctx, ev_ctx,
 695                            MSG_PREFORK_CHILD_EVENT, child_ping);
 696
 697         /*
 698          * As soon as messaging is up check if pcap has been loaded already.
 699          * If pcap has not been loaded yet, then ignore, as we will reload on
 700          * client enumeration anyway.
 701          */
 702         if (pcap_cache_loaded(NULL)) {
 703                 load_printers();
 704         }
 705
 706         mem_ctx = talloc_new(NULL);
 707         if (mem_ctx == NULL) {
 708                 exit(1);
 709         }
 710
 711         /*
 712          * Initialize spoolss with an init function to convert printers first.
 713          * static_init_rpc will try to initialize the spoolss server too but you
 714          * can't register it twice.
 715          */
 716         spoolss_cb.init = spoolss_init_cb;
 717         spoolss_cb.shutdown = spoolss_shutdown_cb;
 718         spoolss_cb.private_data = msg_ctx;
 719
 720         status = rpc_winreg_init(NULL);
 721         if (!NT_STATUS_IS_OK(status)) {
 722                 DEBUG(0, ("Failed to register winreg rpc interface! (%s)\n",
 723                           nt_errstr(status)));
 724                 exit(1);
 725         }
 726
 727         status = rpc_spoolss_init(&spoolss_cb);
 728         if (!NT_STATUS_IS_OK(status)) {
 729                 DEBUG(0, ("Failed to register spoolss rpc interface! (%s)\n",
 730                           nt_errstr(status)));
 731                 exit(1);
 732         }
 733
 734         if (epm_mode != RPC_SERVICE_MODE_DISABLED &&
 735             (lp_parm_bool(-1, "rpc_server", "register_embedded_np", false))) {
 736                 status = dcerpc_binding_vector_new(mem_ctx, &v);
 737                 if (!NT_STATUS_IS_OK(status)) {
 738                         DEBUG(0, ("Failed to create binding vector (%s)\n",
 739                                   nt_errstr(status)));
 740                         exit(1);
 741                 }
 742
 743                 status = dcerpc_binding_vector_add_np_default(&ndr_table_spoolss, v);
 744                 if (!NT_STATUS_IS_OK(status)) {
 745                         DEBUG(0, ("Failed to add np to binding vector (%s)\n",
 746                                   nt_errstr(status)));
 747                         exit(1);
 748                 }
 749
 750                 status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_spoolss, v);
 751                 if (!NT_STATUS_IS_OK(status)) {
 752                         DEBUG(0, ("Failed to register spoolss endpoint! (%s)\n",
 753                                   nt_errstr(status)));
 754                         exit(1);
 755                 }
 756         }
 757
 758         talloc_free(mem_ctx);
 759
 760         ok = spoolssd_setup_children_monitor(ev_ctx, msg_ctx);
 761         if (!ok) {
 762                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 763                 exit(1);
 764         }
 765
 766         DEBUG(1, ("SPOOLSS Daemon Started (%u)\n", (unsigned int)getpid()));
 767
 768         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 769
 770         /* loop forever */
 771         ret = tevent_loop_wait(ev_ctx);
 772
 773         /* should not be reached */
 774         DEBUG(0,("spoolssd tevent_loop_wait() exited with %d - %s\n",
 775                  ret, (ret == 0) ? "out of events" : strerror(errno)));
 776         exit(1);
 777 }