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 "serverid.h"
  21 #include "smbd/smbd.h"
  22
  23 #include "messages.h"
  24 #include "include/printing.h"
  25 #include "printing/nt_printing_migrate_internal.h"
  26 #include "printing/queue_process.h"
  27 #include "printing/pcap.h"
  28 #include "printing/load.h"
  29 #include "ntdomain.h"
  30 #include "librpc/gen_ndr/srv_winreg.h"
  31 #include "librpc/gen_ndr/srv_spoolss.h"
  32 #include "rpc_server/rpc_server.h"
  33 #include "rpc_server/rpc_ep_register.h"
  34 #include "rpc_server/rpc_config.h"
  35 #include "rpc_server/spoolss/srv_spoolss_nt.h"
  36 #include "librpc/rpc/dcerpc_ep.h"
  37 #include "lib/server_prefork.h"
  38 #include "lib/server_prefork_util.h"
  39
  40 #define SPOOLSS_PIPE_NAME "spoolss"
  41 #define DAEMON_NAME "spoolssd"
  42
  43 static struct server_id parent_id;
  44 static struct prefork_pool *spoolss_pool = NULL;
  45 static int spoolss_child_id = 0;
  46
  47 static struct pf_daemon_config default_pf_spoolss_cfg = {
  48         .prefork_status = PFH_INIT,
  49         .min_children = 5,
  50         .max_children = 25,
  51         .spawn_rate = 5,
  52         .max_allowed_clients = 100,
  53         .child_min_life = 60 /* 1 minute minimum life time */
  54 };
  55 static struct pf_daemon_config pf_spoolss_cfg = { 0 };
  56
  57 pid_t start_spoolssd(struct tevent_context *ev_ctx,
  58                      struct messaging_context *msg_ctx);
  59
  60 static void spoolss_reopen_logs(int child_id)
  61 {
  62         char *lfile = lp_logfile(talloc_tos());
  63         char *ext;
  64         int rc;
  65
  66         if (child_id) {
  67                 rc = asprintf(&ext, "%s.%d", DAEMON_NAME, child_id);
  68         } else {
  69                 rc = asprintf(&ext, "%s", DAEMON_NAME);
  70         }
  71
  72         if (rc == -1) {
  73                 return;
  74         }
  75
  76         rc = 0;
  77         if (lfile == NULL || lfile[0] == '\0') {
  78                 rc = asprintf(&lfile, "%s/log.%s",
  79                               get_dyn_LOGFILEBASE(), ext);
  80         } else {
  81                 if (strstr(lfile, ext) == NULL) {
  82                         if (child_id) {
  83                                 rc = asprintf(&lfile, "%s.%d",
  84                                               lp_logfile(talloc_tos()),
  85                                               child_id);
  86                         } else {
  87                                 rc = asprintf(&lfile, "%s.%s",
  88                                               lp_logfile(talloc_tos()),
  89                                               ext);
  90                         }
  91                 }
  92         }
  93
  94         if (rc > 0) {
  95                 lp_set_logfile(lfile);
  96                 SAFE_FREE(lfile);
  97         }
  98
  99         SAFE_FREE(ext);
 100
 101         reopen_logs();
 102 }
 103
 104 static void update_conf(struct tevent_context *ev,
 105                         struct messaging_context *msg)
 106 {
 107         change_to_root_user();
 108         lp_load_global(get_dyn_CONFIGFILE());
 109         load_printers(ev, msg);
 110
 111         spoolss_reopen_logs(spoolss_child_id);
 112         if (spoolss_child_id == 0) {
 113                 pfh_daemon_config(DAEMON_NAME,
 114                                   &pf_spoolss_cfg,
 115                                   &default_pf_spoolss_cfg);
 116                 pfh_manage_pool(ev, msg, &pf_spoolss_cfg, spoolss_pool);
 117         }
 118 }
 119
 120 static void smb_conf_updated(struct messaging_context *msg,
 121                              void *private_data,
 122                              uint32_t msg_type,
 123                              struct server_id server_id,
 124                              DATA_BLOB *data)
 125 {
 126         struct tevent_context *ev_ctx = talloc_get_type_abort(private_data,
 127                                                              struct tevent_context);
 128
 129         DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
 130         update_conf(ev_ctx, msg);
 131 }
 132
 133 static void spoolss_sig_term_handler(struct tevent_context *ev,
 134                                      struct tevent_signal *se,
 135                                      int signum,
 136                                      int count,
 137                                      void *siginfo,
 138                                      void *private_data)
 139 {
 140         exit_server_cleanly("termination signal");
 141 }
 142
 143 static void spoolss_setup_sig_term_handler(struct tevent_context *ev_ctx)
 144 {
 145         struct tevent_signal *se;
 146
 147         se = tevent_add_signal(ev_ctx,
 148                                ev_ctx,
 149                                SIGTERM, 0,
 150                                spoolss_sig_term_handler,
 151                                NULL);
 152         if (!se) {
 153                 exit_server("failed to setup SIGTERM handler");
 154         }
 155 }
 156
 157 static void spoolss_sig_hup_handler(struct tevent_context *ev,
 158                                     struct tevent_signal *se,
 159                                     int signum,
 160                                     int count,
 161                                     void *siginfo,
 162                                     void *pvt)
 163 {
 164         struct messaging_context *msg_ctx;
 165
 166         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 167
 168         DEBUG(1,("Reloading printers after SIGHUP\n"));
 169         update_conf(ev, msg_ctx);
 170
 171         /* relay to all children */
 172         if (spoolss_pool) {
 173                 prefork_send_signal_to_all(spoolss_pool, SIGHUP);
 174         }
 175 }
 176
 177 static void spoolss_setup_sig_hup_handler(struct tevent_context *ev_ctx,
 178                                           struct messaging_context *msg_ctx)
 179 {
 180         struct tevent_signal *se;
 181
 182         se = tevent_add_signal(ev_ctx,
 183                                ev_ctx,
 184                                SIGHUP, 0,
 185                                spoolss_sig_hup_handler,
 186                                msg_ctx);
 187         if (!se) {
 188                 exit_server("failed to setup SIGHUP handler");
 189         }
 190 }
 191
 192 static bool spoolss_init_cb(void *ptr)
 193 {
 194         struct messaging_context *msg_ctx = talloc_get_type_abort(
 195                 ptr, struct messaging_context);
 196
 197         return nt_printing_tdb_migrate(msg_ctx);
 198 }
 199
 200 static bool spoolss_shutdown_cb(void *ptr)
 201 {
 202         srv_spoolss_cleanup();
 203
 204         return true;
 205 }
 206
 207 /* Children */
 208
 209 static void spoolss_chld_sig_hup_handler(struct tevent_context *ev,
 210                                          struct tevent_signal *se,
 211                                          int signum,
 212                                          int count,
 213                                          void *siginfo,
 214                                          void *pvt)
 215 {
 216         struct messaging_context *msg_ctx;
 217
 218         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 219
 220         change_to_root_user();
 221         DEBUG(1,("Reloading printers after SIGHUP\n"));
 222         load_printers(ev, msg_ctx);
 223         spoolss_reopen_logs(spoolss_child_id);
 224 }
 225
 226 static bool spoolss_setup_chld_hup_handler(struct tevent_context *ev_ctx,
 227                                            struct messaging_context *msg_ctx,
 228                                            struct pf_worker_data *pf)
 229 {
 230         struct tevent_signal *se;
 231
 232         se = tevent_add_signal(ev_ctx,
 233                                ev_ctx,
 234                                SIGHUP, 0,
 235                                spoolss_chld_sig_hup_handler,
 236                                msg_ctx);
 237         if (!se) {
 238                 DEBUG(1, ("failed to setup SIGHUP handler"));
 239                 return false;
 240         }
 241
 242         return true;
 243 }
 244
 245 static void parent_ping(struct messaging_context *msg_ctx,
 246                         void *private_data,
 247                         uint32_t msg_type,
 248                         struct server_id server_id,
 249                         DATA_BLOB *data)
 250 {
 251
 252         /* The fact we received this message is enough to let make the event
 253          * loop if it was idle. spoolss_children_main will cycle through
 254          * spoolss_next_client at least once. That function will take whatever
 255          * action is necessary */
 256
 257         DEBUG(10, ("Got message that the parent changed status.\n"));
 258         return;
 259 }
 260
 261 static bool spoolss_child_init(struct tevent_context *ev_ctx,
 262                                int child_id, struct pf_worker_data *pf)
 263 {
 264         NTSTATUS status;
 265         struct rpc_srv_callbacks spoolss_cb;
 266         struct messaging_context *msg_ctx = server_messaging_context();
 267         bool ok;
 268
 269         status = reinit_after_fork(msg_ctx, ev_ctx, true, "spoolssd-child");
 270         if (!NT_STATUS_IS_OK(status)) {
 271                 DEBUG(0,("reinit_after_fork() failed\n"));
 272                 smb_panic("reinit_after_fork() failed");
 273         }
 274
 275         spoolss_child_id = child_id;
 276         spoolss_reopen_logs(child_id);
 277
 278         ok = spoolss_setup_chld_hup_handler(ev_ctx, msg_ctx, pf);
 279         if (!ok) {
 280                 return false;
 281         }
 282
 283         if (!serverid_register(messaging_server_id(msg_ctx),
 284                                 FLAG_MSG_GENERAL |
 285                                 FLAG_MSG_PRINT_GENERAL)) {
 286                 return false;
 287         }
 288
 289         if (!locking_init()) {
 290                 return false;
 291         }
 292
 293         messaging_register(msg_ctx, ev_ctx,
 294                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 295         messaging_register(msg_ctx, ev_ctx,
 296                            MSG_PREFORK_PARENT_EVENT, parent_ping);
 297
 298         /* As soon as messaging is up check if pcap has been loaded already.
 299          * If so then we probably missed a message and should load_printers()
 300          * ourselves. If pcap has not been loaded yet, then ignore, we will get
 301          * a message as soon as the bq process completes the reload. */
 302         if (pcap_cache_loaded(NULL)) {
 303                 load_printers(ev_ctx, msg_ctx);
 304         }
 305
 306         /* try to reinit rpc queues */
 307         spoolss_cb.init = spoolss_init_cb;
 308         spoolss_cb.shutdown = spoolss_shutdown_cb;
 309         spoolss_cb.private_data = msg_ctx;
 310
 311         status = rpc_winreg_init(NULL);
 312         if (!NT_STATUS_IS_OK(status)) {
 313                 DEBUG(0, ("Failed to register winreg rpc interface! (%s)\n",
 314                           nt_errstr(status)));
 315                 return false;
 316         }
 317
 318         status = rpc_spoolss_init(&spoolss_cb);
 319         if (!NT_STATUS_IS_OK(status)) {
 320                 DEBUG(0, ("Failed to register spoolss rpc interface! (%s)\n",
 321                           nt_errstr(status)));
 322                 return false;
 323         }
 324
 325         return true;
 326 }
 327
 328 struct spoolss_children_data {
 329         struct tevent_context *ev_ctx;
 330         struct messaging_context *msg_ctx;
 331         struct pf_worker_data *pf;
 332         int listen_fd_size;
 333         int *listen_fds;
 334 };
 335
 336 static void spoolss_next_client(void *pvt);
 337
 338 static int spoolss_children_main(struct tevent_context *ev_ctx,
 339                                  struct messaging_context *msg_ctx,
 340                                  struct pf_worker_data *pf,
 341                                  int child_id,
 342                                  int listen_fd_size,
 343                                  int *listen_fds,
 344                                  void *private_data)
 345 {
 346         struct spoolss_children_data *data;
 347         bool ok;
 348         int ret = 0;
 349
 350         ok = spoolss_child_init(ev_ctx, child_id, pf);
 351         if (!ok) {
 352                 return 1;
 353         }
 354
 355         data = talloc(ev_ctx, struct spoolss_children_data);
 356         if (!data) {
 357                 return 1;
 358         }
 359         data->pf = pf;
 360         data->ev_ctx = ev_ctx;
 361         data->msg_ctx = msg_ctx;
 362         data->listen_fd_size = listen_fd_size;
 363         data->listen_fds = listen_fds;
 364
 365         /* loop until it is time to exit */
 366         while (pf->status != PF_WORKER_EXITING) {
 367                 /* try to see if it is time to schedule the next client */
 368                 spoolss_next_client(data);
 369
 370                 ret = tevent_loop_once(ev_ctx);
 371                 if (ret != 0) {
 372                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 373                                   ret, strerror(errno)));
 374                         pf->status = PF_WORKER_EXITING;
 375                 }
 376         }
 377
 378         return ret;
 379 }
 380
 381 static void spoolss_client_terminated(void *pvt)
 382 {
 383         struct spoolss_children_data *data;
 384
 385         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 386
 387         pfh_client_terminated(data->pf);
 388
 389         spoolss_next_client(pvt);
 390 }
 391
 392 struct spoolss_new_client {
 393         struct spoolss_children_data *data;
 394         struct tsocket_address *srv_addr;
 395         struct tsocket_address *cli_addr;
 396 };
 397
 398 static void spoolss_handle_client(struct tevent_req *req);
 399
 400 static void spoolss_next_client(void *pvt)
 401 {
 402         struct tevent_req *req;
 403         struct spoolss_children_data *data;
 404         struct spoolss_new_client *next;
 405
 406         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 407
 408         if (!pfh_child_allowed_to_accept(data->pf)) {
 409                 /* nothing to do for now we are already listening
 410                  * or we are not allowed to listen further */
 411                 return;
 412         }
 413
 414         next = talloc_zero(data, struct spoolss_new_client);
 415         if (!next) {
 416                 DEBUG(1, ("Out of memory!?\n"));
 417                 return;
 418         }
 419         next->data = data;
 420
 421         req = prefork_listen_send(next, data->ev_ctx, data->pf,
 422                                   data->listen_fd_size,
 423                                   data->listen_fds);
 424         if (!req) {
 425                 DEBUG(1, ("Failed to make listening request!?\n"));
 426                 talloc_free(next);
 427                 return;
 428         }
 429         tevent_req_set_callback(req, spoolss_handle_client, next);
 430 }
 431
 432 static void spoolss_handle_client(struct tevent_req *req)
 433 {
 434         struct spoolss_children_data *data;
 435         struct spoolss_new_client *client;
 436         const DATA_BLOB ping = data_blob_null;
 437         int ret;
 438         int sd;
 439
 440         client = tevent_req_callback_data(req, struct spoolss_new_client);
 441         data = client->data;
 442
 443         ret = prefork_listen_recv(req, client, &sd,
 444                                   &client->srv_addr, &client->cli_addr);
 445
 446         /* this will free the request too */
 447         talloc_free(client);
 448
 449         if (ret != 0) {
 450                 DEBUG(6, ("No client connection was available after all!\n"));
 451                 return;
 452         }
 453
 454         /* Warn parent that our status changed */
 455         messaging_send(data->msg_ctx, parent_id,
 456                         MSG_PREFORK_CHILD_EVENT, &ping);
 457
 458         DEBUG(2, ("Spoolss preforked child %d got client connection!\n",
 459                   (int)(data->pf->pid)));
 460
 461         named_pipe_accept_function(data->ev_ctx, data->msg_ctx,
 462                                    SPOOLSS_PIPE_NAME, sd,
 463                                    spoolss_client_terminated, data);
 464 }
 465
 466 /* ==== Main Process Functions ==== */
 467
 468 extern pid_t background_lpq_updater_pid;
 469 static char *bq_logfile;
 470
 471 static void check_updater_child(struct tevent_context *ev_ctx,
 472                                 struct messaging_context *msg_ctx)
 473 {
 474         int status;
 475         pid_t pid;
 476
 477         if (background_lpq_updater_pid == -1) {
 478                 return;
 479         }
 480
 481         pid = waitpid(background_lpq_updater_pid, &status, WNOHANG);
 482         if (pid > 0) {
 483                 DEBUG(2, ("The background queue child died... Restarting!\n"));
 484                 pid = start_background_queue(ev_ctx, msg_ctx, bq_logfile);
 485                 background_lpq_updater_pid = pid;
 486         }
 487 }
 488
 489 static void child_ping(struct messaging_context *msg_ctx,
 490                         void *private_data,
 491                         uint32_t msg_type,
 492                         struct server_id server_id,
 493                         DATA_BLOB *data)
 494 {
 495         struct tevent_context *ev_ctx;
 496
 497         ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
 498
 499         DEBUG(10, ("Got message that a child changed status.\n"));
 500         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 501 }
 502
 503 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 504                                     struct messaging_context *msg_ctx,
 505                                     struct timeval current_time);
 506 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 507                                     struct tevent_timer *te,
 508                                     struct timeval current_time,
 509                                     void *pvt);
 510
 511 static void spoolssd_sigchld_handler(struct tevent_context *ev_ctx,
 512                                      struct prefork_pool *pfp,
 513                                      void *pvt)
 514 {
 515         struct messaging_context *msg_ctx;
 516
 517         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 518
 519         /* run pool management so we can fork/retire or increase
 520          * the allowed connections per child based on load */
 521         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 522
 523         /* also check if the updater child is alive and well */
 524         check_updater_child(ev_ctx, msg_ctx);
 525 }
 526
 527 static bool spoolssd_setup_children_monitor(struct tevent_context *ev_ctx,
 528                                             struct messaging_context *msg_ctx)
 529 {
 530         bool ok;
 531
 532         /* add our oun sigchld callback */
 533         prefork_set_sigchld_callback(spoolss_pool,
 534                                      spoolssd_sigchld_handler, msg_ctx);
 535
 536         ok = spoolssd_schedule_check(ev_ctx, msg_ctx,
 537                                      tevent_timeval_current());
 538         return ok;
 539 }
 540
 541 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 542                                     struct messaging_context *msg_ctx,
 543                                     struct timeval current_time)
 544 {
 545         struct tevent_timer *te;
 546         struct timeval next_event;
 547
 548         /* check situation again in 10 seconds */
 549         next_event = tevent_timeval_current_ofs(10, 0);
 550
 551         /* TODO: check when the socket becomes readable, so that children
 552          * are checked only when there is some activity ? */
 553         te = tevent_add_timer(ev_ctx, spoolss_pool, next_event,
 554                                 spoolssd_check_children, msg_ctx);
 555         if (!te) {
 556                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 557                 return false;
 558         }
 559
 560         return true;
 561 }
 562
 563 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 564                                     struct tevent_timer *te,
 565                                     struct timeval current_time,
 566                                     void *pvt)
 567 {
 568         struct messaging_context *msg_ctx;
 569
 570         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 571
 572         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 573
 574         spoolssd_schedule_check(ev_ctx, msg_ctx, current_time);
 575 }
 576
 577 static void print_queue_forward(struct messaging_context *msg,
 578                                 void *private_data,
 579                                 uint32_t msg_type,
 580                                 struct server_id server_id,
 581                                 DATA_BLOB *data)
 582 {
 583         messaging_send_buf(msg, pid_to_procid(background_lpq_updater_pid),
 584                            MSG_PRINTER_UPDATE, data->data, data->length);
 585 }
 586
 587 static char *get_bq_logfile(void)
 588 {
 589         char *lfile = lp_logfile(talloc_tos());
 590         int rc;
 591
 592         if (lfile == NULL || lfile[0] == '\0') {
 593                 rc = asprintf(&lfile, "%s/log.%s.bq",
 594                                         get_dyn_LOGFILEBASE(), DAEMON_NAME);
 595         } else {
 596                 rc = asprintf(&lfile, "%s.bq", lp_logfile(talloc_tos()));
 597         }
 598         if (rc == -1) {
 599                 lfile = NULL;
 600         }
 601         return lfile;
 602 }
 603
 604 pid_t start_spoolssd(struct tevent_context *ev_ctx,
 605                     struct messaging_context *msg_ctx)
 606 {
 607         enum rpc_service_mode_e epm_mode = rpc_epmapper_mode();
 608         struct rpc_srv_callbacks spoolss_cb;
 609         struct dcerpc_binding_vector *v;
 610         TALLOC_CTX *mem_ctx;
 611         pid_t pid;
 612         NTSTATUS status;
 613         int listen_fd;
 614         int ret;
 615         bool ok;
 616
 617         DEBUG(1, ("Forking SPOOLSS Daemon\n"));
 618
 619         /*
 620          * Block signals before forking child as it will have to
 621          * set its own handlers. Child will re-enable SIGHUP as
 622          * soon as the handlers are set up.
 623          */
 624         BlockSignals(true, SIGTERM);
 625         BlockSignals(true, SIGHUP);
 626
 627         pid = fork();
 628
 629         if (pid == -1) {
 630                 DEBUG(0, ("Failed to fork SPOOLSS [%s]\n",
 631                            strerror(errno)));
 632         }
 633
 634         /* parent or error */
 635         if (pid != 0) {
 636
 637                 /* Re-enable SIGHUP before returnig */
 638                 BlockSignals(false, SIGTERM);
 639                 BlockSignals(false, SIGHUP);
 640                 return pid;
 641         }
 642
 643         status = smbd_reinit_after_fork(msg_ctx, ev_ctx, true,
 644                                         "spoolssd-master");
 645         if (!NT_STATUS_IS_OK(status)) {
 646                 DEBUG(0,("reinit_after_fork() failed\n"));
 647                 smb_panic("reinit_after_fork() failed");
 648         }
 649
 650         /* save the parent process id so the children can use it later */
 651         parent_id = messaging_server_id(msg_ctx);
 652
 653         spoolss_reopen_logs(0);
 654         pfh_daemon_config(DAEMON_NAME,
 655                           &pf_spoolss_cfg,
 656                           &default_pf_spoolss_cfg);
 657
 658         spoolss_setup_sig_term_handler(ev_ctx);
 659         spoolss_setup_sig_hup_handler(ev_ctx, msg_ctx);
 660
 661         BlockSignals(false, SIGTERM);
 662         BlockSignals(false, SIGHUP);
 663
 664         /* always start the backgroundqueue listner in spoolssd */
 665         bq_logfile = get_bq_logfile();
 666         pid = start_background_queue(ev_ctx, msg_ctx, bq_logfile);
 667         if (pid > 0) {
 668                 background_lpq_updater_pid = pid;
 669         }
 670
 671         /* the listening fd must be created before the children are actually
 672          * forked out. */
 673         listen_fd = create_named_pipe_socket(SPOOLSS_PIPE_NAME);
 674         if (listen_fd == -1) {
 675                 exit(1);
 676         }
 677
 678         ret = listen(listen_fd, pf_spoolss_cfg.max_allowed_clients);
 679         if (ret == -1) {
 680                 DEBUG(0, ("Failed to listen on spoolss pipe - %s\n",
 681                           strerror(errno)));
 682                 exit(1);
 683         }
 684
 685         /* start children before any more initialization is done */
 686         ok = prefork_create_pool(ev_ctx, /* mem_ctx */
 687                                  ev_ctx, msg_ctx,
 688                                  1, &listen_fd,
 689                                  pf_spoolss_cfg.min_children,
 690                                  pf_spoolss_cfg.max_children,
 691                                  &spoolss_children_main, NULL,
 692                                  &spoolss_pool);
 693         if (!ok) {
 694                 exit(1);
 695         }
 696
 697         if (!serverid_register(messaging_server_id(msg_ctx),
 698                                 FLAG_MSG_GENERAL |
 699                                 FLAG_MSG_PRINT_GENERAL)) {
 700                 exit(1);
 701         }
 702
 703         if (!locking_init()) {
 704                 exit(1);
 705         }
 706
 707         messaging_register(msg_ctx, ev_ctx,
 708                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 709         messaging_register(msg_ctx, NULL, MSG_PRINTER_UPDATE,
 710                            print_queue_forward);
 711         messaging_register(msg_ctx, ev_ctx,
 712                            MSG_PREFORK_CHILD_EVENT, child_ping);
 713
 714         /*
 715          * As soon as messaging is up check if pcap has been loaded already.
 716          * If pcap has not been loaded yet, then ignore, as we will reload on
 717          * client enumeration anyway.
 718          */
 719         if (pcap_cache_loaded(NULL)) {
 720                 load_printers(ev_ctx, msg_ctx);
 721         }
 722
 723         mem_ctx = talloc_new(NULL);
 724         if (mem_ctx == NULL) {
 725                 exit(1);
 726         }
 727
 728         /*
 729          * Initialize spoolss with an init function to convert printers first.
 730          * static_init_rpc will try to initialize the spoolss server too but you
 731          * can't register it twice.
 732          */
 733         spoolss_cb.init = spoolss_init_cb;
 734         spoolss_cb.shutdown = spoolss_shutdown_cb;
 735         spoolss_cb.private_data = msg_ctx;
 736
 737         status = rpc_winreg_init(NULL);
 738         if (!NT_STATUS_IS_OK(status)) {
 739                 DEBUG(0, ("Failed to register winreg rpc interface! (%s)\n",
 740                           nt_errstr(status)));
 741                 exit(1);
 742         }
 743
 744         status = rpc_spoolss_init(&spoolss_cb);
 745         if (!NT_STATUS_IS_OK(status)) {
 746                 DEBUG(0, ("Failed to register spoolss rpc interface! (%s)\n",
 747                           nt_errstr(status)));
 748                 exit(1);
 749         }
 750
 751         if (epm_mode != RPC_SERVICE_MODE_DISABLED &&
 752             (lp_parm_bool(-1, "rpc_server", "register_embedded_np", false))) {
 753                 status = dcerpc_binding_vector_new(mem_ctx, &v);
 754                 if (!NT_STATUS_IS_OK(status)) {
 755                         DEBUG(0, ("Failed to create binding vector (%s)\n",
 756                                   nt_errstr(status)));
 757                         exit(1);
 758                 }
 759
 760                 status = dcerpc_binding_vector_add_np_default(&ndr_table_spoolss, v);
 761                 if (!NT_STATUS_IS_OK(status)) {
 762                         DEBUG(0, ("Failed to add np to binding vector (%s)\n",
 763                                   nt_errstr(status)));
 764                         exit(1);
 765                 }
 766
 767                 status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_spoolss, v);
 768                 if (!NT_STATUS_IS_OK(status)) {
 769                         DEBUG(0, ("Failed to register spoolss endpoint! (%s)\n",
 770                                   nt_errstr(status)));
 771                         exit(1);
 772                 }
 773         }
 774
 775         talloc_free(mem_ctx);
 776
 777         ok = spoolssd_setup_children_monitor(ev_ctx, msg_ctx);
 778         if (!ok) {
 779                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 780                 exit(1);
 781         }
 782
 783         DEBUG(1, ("SPOOLSS Daemon Started (%u)\n", (unsigned int)getpid()));
 784
 785         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 786
 787         /* loop forever */
 788         ret = tevent_loop_wait(ev_ctx);
 789
 790         /* should not be reached */
 791         DEBUG(0,("spoolssd tevent_loop_wait() exited with %d - %s\n",
 792                  ret, (ret == 0) ? "out of events" : strerror(errno)));
 793         exit(1);
 794 }