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 "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 "ntdomain.h"
  27 #include "librpc/gen_ndr/srv_winreg.h"
  28 #include "librpc/gen_ndr/srv_spoolss.h"
  29 #include "rpc_server/rpc_server.h"
  30 #include "rpc_server/rpc_ep_register.h"
  31 #include "rpc_server/spoolss/srv_spoolss_nt.h"
  32 #include "librpc/rpc/dcerpc_ep.h"
  33 #include "lib/server_prefork.h"
  34
  35 #define SPOOLSS_PIPE_NAME "spoolss"
  36 #define DAEMON_NAME "spoolssd"
  37
  38 #define SPOOLSS_MIN_CHILDREN 5
  39 #define SPOOLSS_MAX_CHILDREN 25
  40 #define SPOOLSS_SPAWN_RATE 5
  41 #define SPOOLSS_MIN_LIFE 60 /* 1 minute minimum life time */
  42
  43 static int spoolss_min_children;
  44 static int spoolss_max_children;
  45 static int spoolss_spawn_rate;
  46
  47 static void spoolss_prefork_config(void)
  48 {
  49         const char *prefork_str;
  50         int min, max, rate;
  51         bool use_defaults = false;
  52         int ret;
  53
  54         prefork_str = lp_parm_const_string(GLOBAL_SECTION_SNUM,
  55                                            "spoolssd", "prefork", "none");
  56         if (strcmp(prefork_str, "none") == 0) {
  57                 use_defaults = true;
  58         } else {
  59                 ret = sscanf(prefork_str, "%d:%d:%d", &min, &max, &rate);
  60                 if (ret != 3) {
  61                         DEBUG(0, ("invalid format for spoolssd:prefork!\n"));
  62                         use_defaults = true;
  63                 }
  64         }
  65
  66         if (use_defaults) {
  67                 spoolss_min_children = SPOOLSS_MIN_CHILDREN;
  68                 spoolss_max_children = SPOOLSS_MAX_CHILDREN;
  69                 spoolss_spawn_rate = SPOOLSS_SPAWN_RATE;
  70         } else {
  71                 spoolss_min_children = min;
  72                 spoolss_max_children = max;
  73                 spoolss_spawn_rate = rate;
  74         }
  75 }
  76
  77 void start_spoolssd(struct tevent_context *ev_ctx,
  78                     struct messaging_context *msg_ctx);
  79
  80 static void spoolss_reopen_logs(void)
  81 {
  82         char *lfile = lp_logfile();
  83         int rc;
  84
  85         if (lfile == NULL || lfile[0] == '\0') {
  86                 rc = asprintf(&lfile, "%s/log.%s", get_dyn_LOGFILEBASE(), DAEMON_NAME);
  87                 if (rc > 0) {
  88                         lp_set_logfile(lfile);
  89                         SAFE_FREE(lfile);
  90                 }
  91         } else {
  92                 if (strstr(lfile, DAEMON_NAME) == NULL) {
  93                         rc = asprintf(&lfile, "%s.%s", lp_logfile(), DAEMON_NAME);
  94                         if (rc > 0) {
  95                                 lp_set_logfile(lfile);
  96                                 SAFE_FREE(lfile);
  97                         }
  98                 }
  99         }
 100
 101         reopen_logs();
 102 }
 103
 104 static void smb_conf_updated(struct messaging_context *msg,
 105                              void *private_data,
 106                              uint32_t msg_type,
 107                              struct server_id server_id,
 108                              DATA_BLOB *data)
 109 {
 110         struct tevent_context *ev_ctx = talloc_get_type_abort(private_data,
 111                                                              struct tevent_context);
 112
 113         DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
 114         change_to_root_user();
 115         reload_printers(ev_ctx, msg);
 116         spoolss_reopen_logs();
 117         spoolss_prefork_config();
 118 }
 119
 120 static void spoolss_sig_term_handler(struct tevent_context *ev,
 121                                      struct tevent_signal *se,
 122                                      int signum,
 123                                      int count,
 124                                      void *siginfo,
 125                                      void *private_data)
 126 {
 127         exit_server_cleanly("termination signal");
 128 }
 129
 130 static void spoolss_setup_sig_term_handler(struct tevent_context *ev_ctx)
 131 {
 132         struct tevent_signal *se;
 133
 134         se = tevent_add_signal(ev_ctx,
 135                                ev_ctx,
 136                                SIGTERM, 0,
 137                                spoolss_sig_term_handler,
 138                                NULL);
 139         if (!se) {
 140                 exit_server("failed to setup SIGTERM handler");
 141         }
 142 }
 143
 144 static void spoolss_sig_hup_handler(struct tevent_context *ev,
 145                                     struct tevent_signal *se,
 146                                     int signum,
 147                                     int count,
 148                                     void *siginfo,
 149                                     void *pvt)
 150 {
 151         struct messaging_context *msg_ctx;
 152
 153         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 154
 155         change_to_root_user();
 156         DEBUG(1,("Reloading printers after SIGHUP\n"));
 157         reload_printers(ev, msg_ctx);
 158         spoolss_reopen_logs();
 159 }
 160
 161 static void spoolss_setup_sig_hup_handler(struct tevent_context *ev_ctx,
 162                                           struct messaging_context *msg_ctx)
 163 {
 164         struct tevent_signal *se;
 165
 166         se = tevent_add_signal(ev_ctx,
 167                                ev_ctx,
 168                                SIGHUP, 0,
 169                                spoolss_sig_hup_handler,
 170                                msg_ctx);
 171         if (!se) {
 172                 exit_server("failed to setup SIGHUP handler");
 173         }
 174 }
 175
 176 static bool spoolss_init_cb(void *ptr)
 177 {
 178         struct messaging_context *msg_ctx = talloc_get_type_abort(
 179                 ptr, struct messaging_context);
 180
 181         return nt_printing_tdb_migrate(msg_ctx);
 182 }
 183
 184 static bool spoolss_shutdown_cb(void *ptr)
 185 {
 186         srv_spoolss_cleanup();
 187
 188         return true;
 189 }
 190
 191 /* Childrens */
 192
 193 struct spoolss_chld_sig_hup_ctx {
 194         struct messaging_context *msg_ctx;
 195         struct pf_worker_data *pf;
 196 };
 197
 198 static void spoolss_chld_sig_hup_handler(struct tevent_context *ev,
 199                                          struct tevent_signal *se,
 200                                          int signum,
 201                                          int count,
 202                                          void *siginfo,
 203                                          void *pvt)
 204 {
 205         struct spoolss_chld_sig_hup_ctx *shc;
 206
 207         shc = talloc_get_type_abort(pvt, struct spoolss_chld_sig_hup_ctx);
 208
 209         /* avoid wasting CPU cycles if we are going to exit soon anyways */
 210         if (shc->pf != NULL &&
 211             shc->pf->cmds == PF_SRV_MSG_EXIT) {
 212                 return;
 213         }
 214
 215         change_to_root_user();
 216         DEBUG(1,("Reloading printers after SIGHUP\n"));
 217         reload_printers(ev, shc->msg_ctx);
 218         spoolss_reopen_logs();
 219 }
 220
 221 static bool spoolss_setup_chld_hup_handler(struct tevent_context *ev_ctx,
 222                                            struct pf_worker_data *pf,
 223                                            struct messaging_context *msg_ctx)
 224 {
 225         struct spoolss_chld_sig_hup_ctx *shc;
 226         struct tevent_signal *se;
 227
 228         shc = talloc(ev_ctx, struct spoolss_chld_sig_hup_ctx);
 229         if (!shc) {
 230                 DEBUG(1, ("failed to setup SIGHUP handler"));
 231                 return false;
 232         }
 233         shc->pf = pf;
 234         shc->msg_ctx = msg_ctx;
 235
 236         se = tevent_add_signal(ev_ctx,
 237                                ev_ctx,
 238                                SIGHUP, 0,
 239                                spoolss_chld_sig_hup_handler,
 240                                shc);
 241         if (!se) {
 242                 DEBUG(1, ("failed to setup SIGHUP handler"));
 243                 return false;
 244         }
 245
 246         return true;
 247 }
 248
 249 static bool spoolss_child_init(struct tevent_context *ev_ctx,
 250                                         struct pf_worker_data *pf)
 251 {
 252         NTSTATUS status;
 253         struct rpc_srv_callbacks spoolss_cb;
 254         struct messaging_context *msg_ctx = server_messaging_context();
 255         bool ok;
 256
 257         status = reinit_after_fork(msg_ctx, ev_ctx,
 258                                    procid_self(), true);
 259         if (!NT_STATUS_IS_OK(status)) {
 260                 DEBUG(0,("reinit_after_fork() failed\n"));
 261                 smb_panic("reinit_after_fork() failed");
 262         }
 263
 264         spoolss_reopen_logs();
 265
 266         ok = spoolss_setup_chld_hup_handler(ev_ctx, pf, msg_ctx);
 267         if (!ok) {
 268                 return false;
 269         }
 270
 271         if (!serverid_register(procid_self(), FLAG_MSG_GENERAL)) {
 272                 return false;
 273         }
 274
 275         if (!locking_init()) {
 276                 return false;
 277         }
 278
 279         messaging_register(msg_ctx, ev_ctx,
 280                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 281
 282         /* try to reinit rpc queues */
 283         spoolss_cb.init = spoolss_init_cb;
 284         spoolss_cb.shutdown = spoolss_shutdown_cb;
 285         spoolss_cb.private_data = msg_ctx;
 286
 287         status = rpc_winreg_init(NULL);
 288         if (!NT_STATUS_IS_OK(status)) {
 289                 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
 290                           nt_errstr(status)));
 291                 return false;
 292         }
 293
 294         status = rpc_spoolss_init(&spoolss_cb);
 295         if (!NT_STATUS_IS_OK(status)) {
 296                 DEBUG(0, ("Failed to register spoolss rpc inteface! (%s)\n",
 297                           nt_errstr(status)));
 298                 return false;
 299         }
 300
 301         reload_printers(ev_ctx, msg_ctx);
 302
 303         return true;
 304 }
 305
 306 struct spoolss_children_data {
 307         struct tevent_context *ev_ctx;
 308         struct messaging_context *msg_ctx;
 309         struct pf_worker_data *pf;
 310         int listen_fd;
 311         int lock_fd;
 312
 313         bool listening;
 314 };
 315
 316 static void spoolss_next_client(void *pvt);
 317
 318 static int spoolss_children_main(struct tevent_context *ev_ctx,
 319                                  struct pf_worker_data *pf,
 320                                  int listen_fd, int lock_fd,
 321                                  void *private_data)
 322 {
 323         struct messaging_context *msg_ctx = server_messaging_context();
 324         struct spoolss_children_data *data;
 325         bool ok;
 326         int ret;
 327
 328         ok = spoolss_child_init(ev_ctx, pf);
 329         if (!ok) {
 330                 return 1;
 331         }
 332
 333         data = talloc(ev_ctx, struct spoolss_children_data);
 334         if (!data) {
 335                 return 1;
 336         }
 337         data->pf = pf;
 338         data->ev_ctx = ev_ctx;
 339         data->msg_ctx = msg_ctx;
 340         data->lock_fd = lock_fd;
 341         data->listen_fd = listen_fd;
 342         data->listening = false;
 343
 344         /* loop until it is time to exit */
 345         while (pf->status != PF_WORKER_EXITING) {
 346                 /* try to see if it is time to schedule the next client */
 347                 spoolss_next_client(data);
 348
 349                 ret = tevent_loop_once(ev_ctx);
 350                 if (ret != 0) {
 351                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 352                                   ret, strerror(errno)));
 353                         pf->status = PF_WORKER_EXITING;
 354                 }
 355         }
 356
 357         return ret;
 358 }
 359
 360 static void spoolss_client_terminated(void *pvt)
 361 {
 362         struct spoolss_children_data *data;
 363
 364         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 365
 366         if (data->pf->num_clients) {
 367                 data->pf->num_clients--;
 368         } else {
 369                 DEBUG(2, ("Invalid num clients, aborting!\n"));
 370                 data->pf->status = PF_WORKER_EXITING;
 371                 return;
 372         }
 373
 374         spoolss_next_client(pvt);
 375 }
 376
 377 struct spoolss_new_client {
 378         struct spoolss_children_data *data;
 379         struct sockaddr_un sunaddr;
 380         socklen_t addrlen;
 381 };
 382
 383 static void spoolss_handle_client(struct tevent_req *req);
 384
 385 static void spoolss_next_client(void *pvt)
 386 {
 387         struct tevent_req *req;
 388         struct spoolss_children_data *data;
 389         struct spoolss_new_client *next;
 390
 391         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 392
 393         if (data->pf->num_clients == 0) {
 394                 data->pf->status = PF_WORKER_IDLE;
 395         }
 396
 397         if (data->pf->cmds == PF_SRV_MSG_EXIT) {
 398                 DEBUG(2, ("Parent process commands we terminate!\n"));
 399                 return;
 400         }
 401
 402         if (data->listening ||
 403             data->pf->num_clients >= data->pf->allowed_clients) {
 404                 /* nothing to do for now we are already listening
 405                  * or reached the number of clients we are allowed
 406                  * to handle in parallel */
 407                 return;
 408         }
 409
 410         next = talloc_zero(data, struct spoolss_new_client);
 411         if (!next) {
 412                 DEBUG(1, ("Out of memory!?\n"));
 413                 return;
 414         }
 415         next->data = data;
 416         next->addrlen = sizeof(next->sunaddr);
 417
 418         req = prefork_listen_send(next, data->ev_ctx, data->pf,
 419                                   data->lock_fd, data->listen_fd,
 420                                   (struct sockaddr *)&next->sunaddr,
 421                                   &next->addrlen);
 422         if (!req) {
 423                 DEBUG(1, ("Failed to make listening request!?\n"));
 424                 talloc_free(next);
 425                 return;
 426         }
 427         tevent_req_set_callback(req, spoolss_handle_client, next);
 428
 429         data->listening = true;
 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         int ret;
 437         int sd;
 438
 439         client = tevent_req_callback_data(req, struct spoolss_new_client);
 440         data = client->data;
 441
 442         ret = prefork_listen_recv(req, &sd);
 443
 444         /* this will free the request too */
 445         talloc_free(client);
 446         /* we are done listening */
 447         data->listening = false;
 448
 449         if (ret > 0) {
 450                 DEBUG(1, ("Failed to accept client connection!\n"));
 451                 /* bail out if we are not serving any other client */
 452                 if (data->pf->num_clients == 0) {
 453                         data->pf->status = PF_WORKER_EXITING;
 454                 }
 455                 return;
 456         }
 457
 458         if (ret == -2) {
 459                 DEBUG(1, ("Server asks us to die!\n"));
 460                 data->pf->status = PF_WORKER_EXITING;
 461                 return;
 462         }
 463
 464         DEBUG(2, ("Spoolss preforked child %d got client connection!\n",
 465                   (int)(data->pf->pid)));
 466
 467         named_pipe_accept_function(data->ev_ctx, data->msg_ctx,
 468                                    SPOOLSS_PIPE_NAME, sd,
 469                                    spoolss_client_terminated, data);
 470 }
 471
 472 /* ==== Main Process Functions ==== */
 473
 474 static void spoolssd_sig_chld_handler(struct tevent_context *ev_ctx,
 475                                       struct tevent_signal *se,
 476                                       int signum, int count,
 477                                       void *siginfo, void *pvt)
 478 {
 479         struct prefork_pool *pfp;
 480         pid_t pid;
 481         int status;
 482         bool ok;
 483         int active, total;
 484         int n, r;
 485
 486         pfp = talloc_get_type_abort(pvt, struct prefork_pool);
 487
 488         while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
 489                 ok = prefork_mark_pid_dead(pfp, pid);
 490                 if (!ok) {
 491                         DEBUG(1, ("Pid %d was not found in children pool!\n",
 492                                   (int)pid));
 493                 }
 494         }
 495
 496         /* now check we do not descent below the minimum */
 497         active = prefork_count_active_children(pfp, &total);
 498
 499         n = 0;
 500         if (total < spoolss_min_children) {
 501                 n = total - spoolss_min_children;
 502         } else if (total - active < (total / 4)) {
 503                 n = spoolss_min_children;
 504         }
 505
 506         if (n > 0) {
 507                 r = prefork_add_children(ev_ctx, pfp, n);
 508                 if (r < n) {
 509                         DEBUG(10, ("Tried to start %d children but only,"
 510                                    "%d were actually started.!\n", n, r));
 511                 }
 512         }
 513
 514
 515 }
 516
 517 static bool spoolssd_setup_sig_chld_handler(struct tevent_context *ev_ctx,
 518                                             struct prefork_pool *pfp)
 519 {
 520         struct tevent_signal *se;
 521
 522         se = tevent_add_signal(ev_ctx, ev_ctx, SIGCHLD, 0,
 523                                 spoolssd_sig_chld_handler, pfp);
 524         if (!se) {
 525                 DEBUG(0, ("Failed to setup SIGCHLD handler!\n"));
 526                 return false;
 527         }
 528
 529         return true;
 530 }
 531
 532 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 533                                     struct prefork_pool *pfp,
 534                                     struct timeval current_time);
 535 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 536                                     struct tevent_timer *te,
 537                                     struct timeval current_time,
 538                                     void *pvt);
 539
 540 static bool spoolssd_setup_children_monitor(struct tevent_context *ev_ctx,
 541                                             struct prefork_pool *pfp)
 542 {
 543         bool ok;
 544
 545         ok = spoolssd_setup_sig_chld_handler(ev_ctx, pfp);
 546         if (!ok) {
 547                 return false;
 548         }
 549
 550         ok = spoolssd_schedule_check(ev_ctx, pfp, tevent_timeval_current());
 551         return ok;
 552 }
 553
 554 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 555                                     struct prefork_pool *pfp,
 556                                     struct timeval current_time)
 557 {
 558         struct tevent_timer *te;
 559         struct timeval next_event;
 560
 561         /* check situation again in 10 seconds */
 562         next_event = tevent_timeval_current_ofs(10, 0);
 563
 564         /* check when the socket becomes readable, so that children
 565          * are checked only when there is some activity */
 566         te = tevent_add_timer(ev_ctx, pfp, next_event,
 567                                 spoolssd_check_children, pfp);
 568         if (!te) {
 569                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 570                 return false;
 571         }
 572
 573         return true;
 574 }
 575
 576 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 577                                     struct tevent_timer *te,
 578                                     struct timeval current_time,
 579                                     void *pvt)
 580 {
 581         struct prefork_pool *pfp;
 582         int active, total;
 583         int ret, n;
 584
 585         pfp = talloc_get_type_abort(pvt, struct prefork_pool);
 586
 587         active = prefork_count_active_children(pfp, &total);
 588
 589         if (total - active < spoolss_spawn_rate) {
 590                 n = prefork_add_children(ev_ctx, pfp, spoolss_spawn_rate);
 591                 if (n < spoolss_spawn_rate) {
 592                         DEBUG(10, ("Tried to start 5 children but only,"
 593                                    "%d were actually started.!\n", n));
 594                 }
 595         }
 596
 597         if (total - active > spoolss_min_children) {
 598                 if ((total - spoolss_min_children) >= spoolss_spawn_rate) {
 599                         prefork_retire_children(pfp, spoolss_spawn_rate,
 600                                                 time(NULL) - SPOOLSS_MIN_LIFE);
 601                 }
 602         }
 603
 604         ret = spoolssd_schedule_check(ev_ctx, pfp, current_time);
 605 }
 606
 607 void start_spoolssd(struct tevent_context *ev_ctx,
 608                     struct messaging_context *msg_ctx)
 609 {
 610         struct prefork_pool *pool;
 611         struct rpc_srv_callbacks spoolss_cb;
 612         struct dcerpc_binding_vector *v;
 613         TALLOC_CTX *mem_ctx;
 614         pid_t pid;
 615         NTSTATUS status;
 616         int listen_fd;
 617         int ret;
 618         bool ok;
 619
 620         DEBUG(1, ("Forking SPOOLSS Daemon\n"));
 621
 622         pid = sys_fork();
 623
 624         if (pid == -1) {
 625                 DEBUG(0, ("Failed to fork SPOOLSS [%s], aborting ...\n",
 626                            strerror(errno)));
 627                 exit(1);
 628         }
 629
 630         if (pid) {
 631                 /* parent */
 632                 return;
 633         }
 634
 635         /* child */
 636         close_low_fds(false);
 637
 638         status = reinit_after_fork(msg_ctx,
 639                                    ev_ctx,
 640                                    procid_self(), true);
 641         if (!NT_STATUS_IS_OK(status)) {
 642                 DEBUG(0,("reinit_after_fork() failed\n"));
 643                 smb_panic("reinit_after_fork() failed");
 644         }
 645
 646         spoolss_reopen_logs();
 647         spoolss_prefork_config();
 648
 649         /* the listening fd must be created before the children are actually
 650          * forked out. */
 651         listen_fd = create_named_pipe_socket(SPOOLSS_PIPE_NAME);
 652         if (listen_fd == -1) {
 653                 exit(1);
 654         }
 655
 656         ret = listen(listen_fd, spoolss_max_children);
 657         if (ret == -1) {
 658                 DEBUG(0, ("Failed to listen on spoolss pipe - %s\n",
 659                           strerror(errno)));
 660                 exit(1);
 661         }
 662
 663
 664         /* start children before any more initialization is done */
 665         ok = prefork_create_pool(ev_ctx, ev_ctx, listen_fd,
 666                                  spoolss_min_children,
 667                                  spoolss_max_children,
 668                                  &spoolss_children_main, NULL,
 669                                  &pool);
 670
 671         spoolss_setup_sig_term_handler(ev_ctx);
 672         spoolss_setup_sig_hup_handler(ev_ctx, msg_ctx);
 673
 674         if (!serverid_register(procid_self(),
 675                                 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
 676                                 |FLAG_MSG_PRINT_GENERAL)) {
 677                 exit(1);
 678         }
 679
 680         if (!locking_init()) {
 681                 exit(1);
 682         }
 683
 684         messaging_register(msg_ctx, NULL,
 685                            MSG_PRINTER_UPDATE, print_queue_receive);
 686         messaging_register(msg_ctx, ev_ctx,
 687                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 688
 689         mem_ctx = talloc_new(NULL);
 690         if (mem_ctx == NULL) {
 691                 exit(1);
 692         }
 693
 694         /*
 695          * Initialize spoolss with an init function to convert printers first.
 696          * static_init_rpc will try to initialize the spoolss server too but you
 697          * can't register it twice.
 698          */
 699         spoolss_cb.init = spoolss_init_cb;
 700         spoolss_cb.shutdown = spoolss_shutdown_cb;
 701         spoolss_cb.private_data = msg_ctx;
 702
 703         status = rpc_winreg_init(NULL);
 704         if (!NT_STATUS_IS_OK(status)) {
 705                 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
 706                           nt_errstr(status)));
 707                 exit(1);
 708         }
 709
 710         status = rpc_spoolss_init(&spoolss_cb);
 711         if (!NT_STATUS_IS_OK(status)) {
 712                 DEBUG(0, ("Failed to register spoolss rpc inteface! (%s)\n",
 713                           nt_errstr(status)));
 714                 exit(1);
 715         }
 716
 717         status = dcerpc_binding_vector_new(mem_ctx, &v);
 718         if (!NT_STATUS_IS_OK(status)) {
 719                 DEBUG(0, ("Failed to create binding vector (%s)\n",
 720                           nt_errstr(status)));
 721                 exit(1);
 722         }
 723
 724         status = dcerpc_binding_vector_add_np_default(&ndr_table_spoolss, v);
 725         if (!NT_STATUS_IS_OK(status)) {
 726                 DEBUG(0, ("Failed to add np to binding vector (%s)\n",
 727                           nt_errstr(status)));
 728                 exit(1);
 729         }
 730
 731         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_spoolss, v);
 732         if (!NT_STATUS_IS_OK(status)) {
 733                 DEBUG(0, ("Failed to register spoolss endpoint! (%s)\n",
 734                           nt_errstr(status)));
 735                 exit(1);
 736         }
 737
 738         talloc_free(mem_ctx);
 739
 740         ok = spoolssd_setup_children_monitor(ev_ctx, pool);
 741         if (!ok) {
 742                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 743                 exit(1);
 744         }
 745
 746         reload_printers(ev_ctx, msg_ctx);
 747
 748         DEBUG(1, ("SPOOLSS Daemon Started (%d)\n", getpid()));
 749
 750         /* loop forever */
 751         ret = tevent_loop_wait(ev_ctx);
 752
 753         /* should not be reached */
 754         DEBUG(0,("background_queue: tevent_loop_wait() exited with %d - %s\n",
 755                  ret, (ret == 0) ? "out of events" : strerror(errno)));
 756         exit(1);
 757 }