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(ev, msg);
 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         struct messaging_context *msg_ctx;
 216
 217         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 218
 219         change_to_root_user();
 220         DEBUG(1,("Reloading printers after SIGHUP\n"));
 221         load_printers(ev, msg_ctx);
 222         spoolss_reopen_logs(spoolss_child_id);
 223 }
 224
 225 static bool spoolss_setup_chld_hup_handler(struct tevent_context *ev_ctx,
 226                                            struct messaging_context *msg_ctx,
 227                                            struct pf_worker_data *pf)
 228 {
 229         struct tevent_signal *se;
 230
 231         se = tevent_add_signal(ev_ctx,
 232                                ev_ctx,
 233                                SIGHUP, 0,
 234                                spoolss_chld_sig_hup_handler,
 235                                msg_ctx);
 236         if (!se) {
 237                 DEBUG(1, ("failed to setup SIGHUP handler"));
 238                 return false;
 239         }
 240
 241         return true;
 242 }
 243
 244 static void parent_ping(struct messaging_context *msg_ctx,
 245                         void *private_data,
 246                         uint32_t msg_type,
 247                         struct server_id server_id,
 248                         DATA_BLOB *data)
 249 {
 250
 251         /* The fact we received this message is enough to let make the event
 252          * loop if it was idle. spoolss_children_main will cycle through
 253          * spoolss_next_client at least once. That function will take whatever
 254          * action is necessary */
 255
 256         DEBUG(10, ("Got message that the parent changed status.\n"));
 257         return;
 258 }
 259
 260 static bool spoolss_child_init(struct tevent_context *ev_ctx,
 261                                int child_id, struct pf_worker_data *pf)
 262 {
 263         NTSTATUS status;
 264         struct rpc_srv_callbacks spoolss_cb;
 265         struct messaging_context *msg_ctx = server_messaging_context();
 266         bool ok;
 267
 268         status = reinit_after_fork(msg_ctx, ev_ctx, true, "spoolssd-child");
 269         if (!NT_STATUS_IS_OK(status)) {
 270                 DEBUG(0,("reinit_after_fork() failed\n"));
 271                 smb_panic("reinit_after_fork() failed");
 272         }
 273
 274         spoolss_child_id = child_id;
 275         spoolss_reopen_logs(child_id);
 276
 277         ok = spoolss_setup_chld_hup_handler(ev_ctx, msg_ctx, pf);
 278         if (!ok) {
 279                 return false;
 280         }
 281
 282         if (!locking_init()) {
 283                 return false;
 284         }
 285
 286         messaging_register(msg_ctx, ev_ctx,
 287                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 288         messaging_register(msg_ctx, ev_ctx,
 289                            MSG_PREFORK_PARENT_EVENT, parent_ping);
 290
 291         /* As soon as messaging is up check if pcap has been loaded already.
 292          * If so then we probably missed a message and should load_printers()
 293          * ourselves. If pcap has not been loaded yet, then ignore, we will get
 294          * a message as soon as the bq process completes the reload. */
 295         if (pcap_cache_loaded(NULL)) {
 296                 load_printers(ev_ctx, msg_ctx);
 297         }
 298
 299         /* try to reinit rpc queues */
 300         spoolss_cb.init = spoolss_init_cb;
 301         spoolss_cb.shutdown = spoolss_shutdown_cb;
 302         spoolss_cb.private_data = msg_ctx;
 303
 304         status = rpc_winreg_init(NULL);
 305         if (!NT_STATUS_IS_OK(status)) {
 306                 DEBUG(0, ("Failed to register winreg rpc interface! (%s)\n",
 307                           nt_errstr(status)));
 308                 return false;
 309         }
 310
 311         status = rpc_spoolss_init(&spoolss_cb);
 312         if (!NT_STATUS_IS_OK(status)) {
 313                 DEBUG(0, ("Failed to register spoolss rpc interface! (%s)\n",
 314                           nt_errstr(status)));
 315                 return false;
 316         }
 317
 318         return true;
 319 }
 320
 321 struct spoolss_children_data {
 322         struct tevent_context *ev_ctx;
 323         struct messaging_context *msg_ctx;
 324         struct pf_worker_data *pf;
 325         int listen_fd_size;
 326         int *listen_fds;
 327 };
 328
 329 static void spoolss_next_client(void *pvt);
 330
 331 static int spoolss_children_main(struct tevent_context *ev_ctx,
 332                                  struct messaging_context *msg_ctx,
 333                                  struct pf_worker_data *pf,
 334                                  int child_id,
 335                                  int listen_fd_size,
 336                                  int *listen_fds,
 337                                  void *private_data)
 338 {
 339         struct spoolss_children_data *data;
 340         bool ok;
 341         int ret = 0;
 342
 343         ok = spoolss_child_init(ev_ctx, child_id, pf);
 344         if (!ok) {
 345                 return 1;
 346         }
 347
 348         data = talloc(ev_ctx, struct spoolss_children_data);
 349         if (!data) {
 350                 return 1;
 351         }
 352         data->pf = pf;
 353         data->ev_ctx = ev_ctx;
 354         data->msg_ctx = msg_ctx;
 355         data->listen_fd_size = listen_fd_size;
 356         data->listen_fds = listen_fds;
 357
 358         /* loop until it is time to exit */
 359         while (pf->status != PF_WORKER_EXITING) {
 360                 /* try to see if it is time to schedule the next client */
 361                 spoolss_next_client(data);
 362
 363                 ret = tevent_loop_once(ev_ctx);
 364                 if (ret != 0) {
 365                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 366                                   ret, strerror(errno)));
 367                         pf->status = PF_WORKER_EXITING;
 368                 }
 369         }
 370
 371         return ret;
 372 }
 373
 374 static void spoolss_client_terminated(void *pvt)
 375 {
 376         struct spoolss_children_data *data;
 377
 378         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 379
 380         pfh_client_terminated(data->pf);
 381
 382         spoolss_next_client(pvt);
 383 }
 384
 385 struct spoolss_new_client {
 386         struct spoolss_children_data *data;
 387         struct tsocket_address *srv_addr;
 388         struct tsocket_address *cli_addr;
 389 };
 390
 391 static void spoolss_handle_client(struct tevent_req *req);
 392
 393 static void spoolss_next_client(void *pvt)
 394 {
 395         struct tevent_req *req;
 396         struct spoolss_children_data *data;
 397         struct spoolss_new_client *next;
 398
 399         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 400
 401         if (!pfh_child_allowed_to_accept(data->pf)) {
 402                 /* nothing to do for now we are already listening
 403                  * or we are not allowed to listen further */
 404                 return;
 405         }
 406
 407         next = talloc_zero(data, struct spoolss_new_client);
 408         if (!next) {
 409                 DEBUG(1, ("Out of memory!?\n"));
 410                 return;
 411         }
 412         next->data = data;
 413
 414         req = prefork_listen_send(next, data->ev_ctx, data->pf,
 415                                   data->listen_fd_size,
 416                                   data->listen_fds);
 417         if (!req) {
 418                 DEBUG(1, ("Failed to make listening request!?\n"));
 419                 talloc_free(next);
 420                 return;
 421         }
 422         tevent_req_set_callback(req, spoolss_handle_client, next);
 423 }
 424
 425 static void spoolss_handle_client(struct tevent_req *req)
 426 {
 427         struct spoolss_children_data *data;
 428         struct spoolss_new_client *client;
 429         const DATA_BLOB ping = data_blob_null;
 430         int ret;
 431         int sd;
 432
 433         client = tevent_req_callback_data(req, struct spoolss_new_client);
 434         data = client->data;
 435
 436         ret = prefork_listen_recv(req, client, &sd,
 437                                   &client->srv_addr, &client->cli_addr);
 438
 439         /* this will free the request too */
 440         talloc_free(client);
 441
 442         if (ret != 0) {
 443                 DEBUG(6, ("No client connection was available after all!\n"));
 444                 return;
 445         }
 446
 447         /* Warn parent that our status changed */
 448         messaging_send(data->msg_ctx, parent_id,
 449                         MSG_PREFORK_CHILD_EVENT, &ping);
 450
 451         DEBUG(2, ("Spoolss preforked child %d got client connection!\n",
 452                   (int)(data->pf->pid)));
 453
 454         named_pipe_accept_function(data->ev_ctx, data->msg_ctx,
 455                                    SPOOLSS_PIPE_NAME, sd,
 456                                    spoolss_client_terminated, data);
 457 }
 458
 459 /* ==== Main Process Functions ==== */
 460
 461 extern pid_t background_lpq_updater_pid;
 462 static char *bq_logfile;
 463
 464 static void check_updater_child(struct tevent_context *ev_ctx,
 465                                 struct messaging_context *msg_ctx)
 466 {
 467         int status;
 468         pid_t pid;
 469
 470         if (background_lpq_updater_pid == -1) {
 471                 return;
 472         }
 473
 474         pid = waitpid(background_lpq_updater_pid, &status, WNOHANG);
 475         if (pid > 0) {
 476                 DEBUG(2, ("The background queue child died... Restarting!\n"));
 477                 pid = start_background_queue(ev_ctx, msg_ctx, bq_logfile);
 478                 background_lpq_updater_pid = pid;
 479         }
 480 }
 481
 482 static void child_ping(struct messaging_context *msg_ctx,
 483                         void *private_data,
 484                         uint32_t msg_type,
 485                         struct server_id server_id,
 486                         DATA_BLOB *data)
 487 {
 488         struct tevent_context *ev_ctx;
 489
 490         ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
 491
 492         DEBUG(10, ("Got message that a child changed status.\n"));
 493         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 494 }
 495
 496 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 497                                     struct messaging_context *msg_ctx,
 498                                     struct timeval current_time);
 499 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 500                                     struct tevent_timer *te,
 501                                     struct timeval current_time,
 502                                     void *pvt);
 503
 504 static void spoolssd_sigchld_handler(struct tevent_context *ev_ctx,
 505                                      struct prefork_pool *pfp,
 506                                      void *pvt)
 507 {
 508         struct messaging_context *msg_ctx;
 509
 510         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 511
 512         /* run pool management so we can fork/retire or increase
 513          * the allowed connections per child based on load */
 514         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 515
 516         /* also check if the updater child is alive and well */
 517         check_updater_child(ev_ctx, msg_ctx);
 518 }
 519
 520 static bool spoolssd_setup_children_monitor(struct tevent_context *ev_ctx,
 521                                             struct messaging_context *msg_ctx)
 522 {
 523         bool ok;
 524
 525         /* add our oun sigchld callback */
 526         prefork_set_sigchld_callback(spoolss_pool,
 527                                      spoolssd_sigchld_handler, msg_ctx);
 528
 529         ok = spoolssd_schedule_check(ev_ctx, msg_ctx,
 530                                      tevent_timeval_current());
 531         return ok;
 532 }
 533
 534 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 535                                     struct messaging_context *msg_ctx,
 536                                     struct timeval current_time)
 537 {
 538         struct tevent_timer *te;
 539         struct timeval next_event;
 540
 541         /* check situation again in 10 seconds */
 542         next_event = tevent_timeval_current_ofs(10, 0);
 543
 544         /* TODO: check when the socket becomes readable, so that children
 545          * are checked only when there is some activity ? */
 546         te = tevent_add_timer(ev_ctx, spoolss_pool, next_event,
 547                                 spoolssd_check_children, msg_ctx);
 548         if (!te) {
 549                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 550                 return false;
 551         }
 552
 553         return true;
 554 }
 555
 556 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 557                                     struct tevent_timer *te,
 558                                     struct timeval current_time,
 559                                     void *pvt)
 560 {
 561         struct messaging_context *msg_ctx;
 562
 563         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 564
 565         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 566
 567         spoolssd_schedule_check(ev_ctx, msg_ctx, current_time);
 568 }
 569
 570 static void print_queue_forward(struct messaging_context *msg,
 571                                 void *private_data,
 572                                 uint32_t msg_type,
 573                                 struct server_id server_id,
 574                                 DATA_BLOB *data)
 575 {
 576         messaging_send_buf(msg, pid_to_procid(background_lpq_updater_pid),
 577                            MSG_PRINTER_UPDATE, data->data, data->length);
 578 }
 579
 580 static char *get_bq_logfile(void)
 581 {
 582         char *lfile = lp_logfile(talloc_tos());
 583         int rc;
 584
 585         if (lfile == NULL || lfile[0] == '\0') {
 586                 rc = asprintf(&lfile, "%s/log.%s.bq",
 587                                         get_dyn_LOGFILEBASE(), DAEMON_NAME);
 588         } else {
 589                 rc = asprintf(&lfile, "%s.bq", lp_logfile(talloc_tos()));
 590         }
 591         if (rc == -1) {
 592                 lfile = NULL;
 593         }
 594         return lfile;
 595 }
 596
 597 pid_t start_spoolssd(struct tevent_context *ev_ctx,
 598                     struct messaging_context *msg_ctx)
 599 {
 600         enum rpc_service_mode_e epm_mode = rpc_epmapper_mode();
 601         struct rpc_srv_callbacks spoolss_cb;
 602         struct dcerpc_binding_vector *v;
 603         TALLOC_CTX *mem_ctx;
 604         pid_t pid;
 605         NTSTATUS status;
 606         int listen_fd;
 607         int ret;
 608         bool ok;
 609
 610         DEBUG(1, ("Forking SPOOLSS Daemon\n"));
 611
 612         /*
 613          * Block signals before forking child as it will have to
 614          * set its own handlers. Child will re-enable SIGHUP as
 615          * soon as the handlers are set up.
 616          */
 617         BlockSignals(true, SIGTERM);
 618         BlockSignals(true, SIGHUP);
 619
 620         pid = fork();
 621
 622         if (pid == -1) {
 623                 DEBUG(0, ("Failed to fork SPOOLSS [%s]\n",
 624                            strerror(errno)));
 625         }
 626
 627         /* parent or error */
 628         if (pid != 0) {
 629
 630                 /* Re-enable SIGHUP before returnig */
 631                 BlockSignals(false, SIGTERM);
 632                 BlockSignals(false, SIGHUP);
 633                 return pid;
 634         }
 635
 636         status = smbd_reinit_after_fork(msg_ctx, ev_ctx, true,
 637                                         "spoolssd-master");
 638         if (!NT_STATUS_IS_OK(status)) {
 639                 DEBUG(0,("reinit_after_fork() failed\n"));
 640                 smb_panic("reinit_after_fork() failed");
 641         }
 642
 643         /* save the parent process id so the children can use it later */
 644         parent_id = messaging_server_id(msg_ctx);
 645
 646         spoolss_reopen_logs(0);
 647         pfh_daemon_config(DAEMON_NAME,
 648                           &pf_spoolss_cfg,
 649                           &default_pf_spoolss_cfg);
 650
 651         spoolss_setup_sig_term_handler(ev_ctx);
 652         spoolss_setup_sig_hup_handler(ev_ctx, msg_ctx);
 653
 654         BlockSignals(false, SIGTERM);
 655         BlockSignals(false, SIGHUP);
 656
 657         /* always start the backgroundqueue listner in spoolssd */
 658         bq_logfile = get_bq_logfile();
 659         pid = start_background_queue(ev_ctx, msg_ctx, bq_logfile);
 660         if (pid > 0) {
 661                 background_lpq_updater_pid = pid;
 662         }
 663
 664         /* the listening fd must be created before the children are actually
 665          * forked out. */
 666         listen_fd = create_named_pipe_socket(SPOOLSS_PIPE_NAME);
 667         if (listen_fd == -1) {
 668                 exit(1);
 669         }
 670
 671         ret = listen(listen_fd, pf_spoolss_cfg.max_allowed_clients);
 672         if (ret == -1) {
 673                 DEBUG(0, ("Failed to listen on spoolss pipe - %s\n",
 674                           strerror(errno)));
 675                 exit(1);
 676         }
 677
 678         /* start children before any more initialization is done */
 679         ok = prefork_create_pool(ev_ctx, /* mem_ctx */
 680                                  ev_ctx, msg_ctx,
 681                                  1, &listen_fd,
 682                                  pf_spoolss_cfg.min_children,
 683                                  pf_spoolss_cfg.max_children,
 684                                  &spoolss_children_main, NULL,
 685                                  &spoolss_pool);
 686         if (!ok) {
 687                 exit(1);
 688         }
 689
 690         if (!locking_init()) {
 691                 exit(1);
 692         }
 693
 694         messaging_register(msg_ctx, ev_ctx,
 695                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 696         messaging_register(msg_ctx, NULL, MSG_PRINTER_UPDATE,
 697                            print_queue_forward);
 698         messaging_register(msg_ctx, ev_ctx,
 699                            MSG_PREFORK_CHILD_EVENT, child_ping);
 700
 701         /*
 702          * As soon as messaging is up check if pcap has been loaded already.
 703          * If pcap has not been loaded yet, then ignore, as we will reload on
 704          * client enumeration anyway.
 705          */
 706         if (pcap_cache_loaded(NULL)) {
 707                 load_printers(ev_ctx, msg_ctx);
 708         }
 709
 710         mem_ctx = talloc_new(NULL);
 711         if (mem_ctx == NULL) {
 712                 exit(1);
 713         }
 714
 715         /*
 716          * Initialize spoolss with an init function to convert printers first.
 717          * static_init_rpc will try to initialize the spoolss server too but you
 718          * can't register it twice.
 719          */
 720         spoolss_cb.init = spoolss_init_cb;
 721         spoolss_cb.shutdown = spoolss_shutdown_cb;
 722         spoolss_cb.private_data = msg_ctx;
 723
 724         status = rpc_winreg_init(NULL);
 725         if (!NT_STATUS_IS_OK(status)) {
 726                 DEBUG(0, ("Failed to register winreg rpc interface! (%s)\n",
 727                           nt_errstr(status)));
 728                 exit(1);
 729         }
 730
 731         status = rpc_spoolss_init(&spoolss_cb);
 732         if (!NT_STATUS_IS_OK(status)) {
 733                 DEBUG(0, ("Failed to register spoolss rpc interface! (%s)\n",
 734                           nt_errstr(status)));
 735                 exit(1);
 736         }
 737
 738         if (epm_mode != RPC_SERVICE_MODE_DISABLED &&
 739             (lp_parm_bool(-1, "rpc_server", "register_embedded_np", false))) {
 740                 status = dcerpc_binding_vector_new(mem_ctx, &v);
 741                 if (!NT_STATUS_IS_OK(status)) {
 742                         DEBUG(0, ("Failed to create binding vector (%s)\n",
 743                                   nt_errstr(status)));
 744                         exit(1);
 745                 }
 746
 747                 status = dcerpc_binding_vector_add_np_default(&ndr_table_spoolss, v);
 748                 if (!NT_STATUS_IS_OK(status)) {
 749                         DEBUG(0, ("Failed to add np to binding vector (%s)\n",
 750                                   nt_errstr(status)));
 751                         exit(1);
 752                 }
 753
 754                 status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_spoolss, v);
 755                 if (!NT_STATUS_IS_OK(status)) {
 756                         DEBUG(0, ("Failed to register spoolss endpoint! (%s)\n",
 757                                   nt_errstr(status)));
 758                         exit(1);
 759                 }
 760         }
 761
 762         talloc_free(mem_ctx);
 763
 764         ok = spoolssd_setup_children_monitor(ev_ctx, msg_ctx);
 765         if (!ok) {
 766                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 767                 exit(1);
 768         }
 769
 770         DEBUG(1, ("SPOOLSS Daemon Started (%u)\n", (unsigned int)getpid()));
 771
 772         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 773
 774         /* loop forever */
 775         ret = tevent_loop_wait(ev_ctx);
 776
 777         /* should not be reached */
 778         DEBUG(0,("spoolssd tevent_loop_wait() exited with %d - %s\n",
 779                  ret, (ret == 0) ? "out of events" : strerror(errno)));
 780         exit(1);
 781 }