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/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 prefork_pool *spoolss_pool = NULL;
  43 static int spoolss_child_id = 0;
  44
  45 static struct pf_daemon_config default_pf_spoolss_cfg = {
  46         .prefork_status = PFH_INIT,
  47         .min_children = 5,
  48         .max_children = 25,
  49         .spawn_rate = 5,
  50         .max_allowed_clients = 100,
  51         .child_min_life = 60 /* 1 minute minimum life time */
  52 };
  53 static struct pf_daemon_config pf_spoolss_cfg = { 0 };
  54
  55 pid_t start_spoolssd(struct tevent_context *ev_ctx,
  56                      struct messaging_context *msg_ctx);
  57
  58 static void spoolss_reopen_logs(int child_id)
  59 {
  60         char *lfile = lp_logfile();
  61         char *ext;
  62         int rc;
  63
  64         if (child_id) {
  65                 rc = asprintf(&ext, "%s.%d", DAEMON_NAME, child_id);
  66         } else {
  67                 rc = asprintf(&ext, "%s", DAEMON_NAME);
  68         }
  69
  70         if (rc == -1) {
  71                 return;
  72         }
  73
  74         rc = 0;
  75         if (lfile == NULL || lfile[0] == '\0') {
  76                 rc = asprintf(&lfile, "%s/log.%s",
  77                               get_dyn_LOGFILEBASE(), ext);
  78         } else {
  79                 if (strstr(lfile, ext) == NULL) {
  80                         if (child_id) {
  81                                 rc = asprintf(&lfile, "%s.%d",
  82                                               lp_logfile(), child_id);
  83                         } else {
  84                                 rc = asprintf(&lfile, "%s.%s",
  85                                               lp_logfile(), ext);
  86                         }
  87                 }
  88         }
  89
  90         if (rc > 0) {
  91                 lp_set_logfile(lfile);
  92                 SAFE_FREE(lfile);
  93         }
  94
  95         SAFE_FREE(ext);
  96
  97         reopen_logs();
  98 }
  99
 100 static void update_conf(struct tevent_context *ev,
 101                         struct messaging_context *msg)
 102 {
 103         change_to_root_user();
 104         lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
 105         reload_printers(ev, msg);
 106
 107         spoolss_reopen_logs(spoolss_child_id);
 108         if (spoolss_child_id == 0) {
 109                 pfh_daemon_config(DAEMON_NAME,
 110                                   &pf_spoolss_cfg,
 111                                   &default_pf_spoolss_cfg);
 112                 pfh_manage_pool(ev, msg, &pf_spoolss_cfg, spoolss_pool);
 113         }
 114 }
 115
 116 static void smb_conf_updated(struct messaging_context *msg,
 117                              void *private_data,
 118                              uint32_t msg_type,
 119                              struct server_id server_id,
 120                              DATA_BLOB *data)
 121 {
 122         struct tevent_context *ev_ctx = talloc_get_type_abort(private_data,
 123                                                              struct tevent_context);
 124
 125         DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
 126         update_conf(ev_ctx, msg);
 127 }
 128
 129 static void update_pcap(struct tevent_context *ev_ctx,
 130                         struct messaging_context *msg_ctx)
 131 {
 132         change_to_root_user();
 133         reload_printers(ev_ctx, msg_ctx);
 134 }
 135
 136 static void pcap_updated(struct messaging_context *msg,
 137                          void *private_data,
 138                          uint32_t msg_type,
 139                          struct server_id server_id,
 140                          DATA_BLOB *data)
 141 {
 142         struct tevent_context *ev_ctx;
 143
 144         ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
 145
 146         DEBUG(10, ("Got message that pcap updated. Reloading.\n"));
 147         update_pcap(ev_ctx, msg);
 148 }
 149
 150 static void spoolss_sig_term_handler(struct tevent_context *ev,
 151                                      struct tevent_signal *se,
 152                                      int signum,
 153                                      int count,
 154                                      void *siginfo,
 155                                      void *private_data)
 156 {
 157         exit_server_cleanly("termination signal");
 158 }
 159
 160 static void spoolss_setup_sig_term_handler(struct tevent_context *ev_ctx)
 161 {
 162         struct tevent_signal *se;
 163
 164         se = tevent_add_signal(ev_ctx,
 165                                ev_ctx,
 166                                SIGTERM, 0,
 167                                spoolss_sig_term_handler,
 168                                NULL);
 169         if (!se) {
 170                 exit_server("failed to setup SIGTERM handler");
 171         }
 172 }
 173
 174 static void spoolss_sig_hup_handler(struct tevent_context *ev,
 175                                     struct tevent_signal *se,
 176                                     int signum,
 177                                     int count,
 178                                     void *siginfo,
 179                                     void *pvt)
 180 {
 181         struct messaging_context *msg_ctx;
 182
 183         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 184
 185         DEBUG(1,("Reloading printers after SIGHUP\n"));
 186         update_conf(ev, msg_ctx);
 187
 188         /* relay to all children */
 189         if (spoolss_pool) {
 190                 prefork_send_signal_to_all(spoolss_pool, SIGHUP);
 191         }
 192 }
 193
 194 static void spoolss_setup_sig_hup_handler(struct tevent_context *ev_ctx,
 195                                           struct messaging_context *msg_ctx)
 196 {
 197         struct tevent_signal *se;
 198
 199         se = tevent_add_signal(ev_ctx,
 200                                ev_ctx,
 201                                SIGHUP, 0,
 202                                spoolss_sig_hup_handler,
 203                                msg_ctx);
 204         if (!se) {
 205                 exit_server("failed to setup SIGHUP handler");
 206         }
 207 }
 208
 209 static bool spoolss_init_cb(void *ptr)
 210 {
 211         struct messaging_context *msg_ctx = talloc_get_type_abort(
 212                 ptr, struct messaging_context);
 213
 214         return nt_printing_tdb_migrate(msg_ctx);
 215 }
 216
 217 static bool spoolss_shutdown_cb(void *ptr)
 218 {
 219         srv_spoolss_cleanup();
 220
 221         return true;
 222 }
 223
 224 /* Children */
 225
 226 struct spoolss_chld_sig_hup_ctx {
 227         struct messaging_context *msg_ctx;
 228         struct pf_worker_data *pf;
 229 };
 230
 231 static void spoolss_chld_sig_hup_handler(struct tevent_context *ev,
 232                                          struct tevent_signal *se,
 233                                          int signum,
 234                                          int count,
 235                                          void *siginfo,
 236                                          void *pvt)
 237 {
 238         struct spoolss_chld_sig_hup_ctx *shc;
 239
 240         shc = talloc_get_type_abort(pvt, struct spoolss_chld_sig_hup_ctx);
 241
 242         /* avoid wasting CPU cycles if we are going to exit soon anyways */
 243         if (shc->pf != NULL &&
 244             shc->pf->cmds == PF_SRV_MSG_EXIT) {
 245                 return;
 246         }
 247
 248         change_to_root_user();
 249         DEBUG(1,("Reloading printers after SIGHUP\n"));
 250         reload_printers(ev, shc->msg_ctx);
 251         spoolss_reopen_logs(spoolss_child_id);
 252 }
 253
 254 static bool spoolss_setup_chld_hup_handler(struct tevent_context *ev_ctx,
 255                                            struct messaging_context *msg_ctx,
 256                                            struct pf_worker_data *pf)
 257 {
 258         struct spoolss_chld_sig_hup_ctx *shc;
 259         struct tevent_signal *se;
 260
 261         shc = talloc(ev_ctx, struct spoolss_chld_sig_hup_ctx);
 262         if (!shc) {
 263                 DEBUG(1, ("failed to setup SIGHUP handler"));
 264                 return false;
 265         }
 266         shc->pf = pf;
 267         shc->msg_ctx = msg_ctx;
 268
 269         se = tevent_add_signal(ev_ctx,
 270                                ev_ctx,
 271                                SIGHUP, 0,
 272                                spoolss_chld_sig_hup_handler,
 273                                shc);
 274         if (!se) {
 275                 DEBUG(1, ("failed to setup SIGHUP handler"));
 276                 return false;
 277         }
 278
 279         return true;
 280 }
 281
 282 static bool spoolss_child_init(struct tevent_context *ev_ctx,
 283                                int child_id, struct pf_worker_data *pf)
 284 {
 285         NTSTATUS status;
 286         struct rpc_srv_callbacks spoolss_cb;
 287         struct messaging_context *msg_ctx = server_messaging_context();
 288         bool ok;
 289
 290         status = reinit_after_fork(msg_ctx, ev_ctx,
 291                                    procid_self(), true);
 292         if (!NT_STATUS_IS_OK(status)) {
 293                 DEBUG(0,("reinit_after_fork() failed\n"));
 294                 smb_panic("reinit_after_fork() failed");
 295         }
 296
 297         spoolss_child_id = child_id;
 298         spoolss_reopen_logs(child_id);
 299
 300         ok = spoolss_setup_chld_hup_handler(ev_ctx, msg_ctx, pf);
 301         if (!ok) {
 302                 return false;
 303         }
 304
 305         if (!serverid_register(procid_self(),
 306                                 FLAG_MSG_GENERAL |
 307                                 FLAG_MSG_PRINT_GENERAL)) {
 308                 return false;
 309         }
 310
 311         if (!locking_init()) {
 312                 return false;
 313         }
 314
 315         messaging_register(msg_ctx, ev_ctx,
 316                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 317         messaging_register(msg_ctx, ev_ctx, MSG_PRINTER_PCAP,
 318                            pcap_updated);
 319
 320         /* As soon as messaging is up check if pcap has been loaded already.
 321          * If so then we probably missed a message and should load_printers()
 322          * ourselves. If pcap has not been loaded yet, then ignore, we will get
 323          * a message as soon as the bq process completes the reload. */
 324         if (pcap_cache_loaded()) {
 325                 load_printers(ev_ctx, msg_ctx);
 326         }
 327
 328         /* try to reinit rpc queues */
 329         spoolss_cb.init = spoolss_init_cb;
 330         spoolss_cb.shutdown = spoolss_shutdown_cb;
 331         spoolss_cb.private_data = msg_ctx;
 332
 333         status = rpc_winreg_init(NULL);
 334         if (!NT_STATUS_IS_OK(status)) {
 335                 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
 336                           nt_errstr(status)));
 337                 return false;
 338         }
 339
 340         status = rpc_spoolss_init(&spoolss_cb);
 341         if (!NT_STATUS_IS_OK(status)) {
 342                 DEBUG(0, ("Failed to register spoolss rpc inteface! (%s)\n",
 343                           nt_errstr(status)));
 344                 return false;
 345         }
 346
 347         return true;
 348 }
 349
 350 struct spoolss_children_data {
 351         struct tevent_context *ev_ctx;
 352         struct messaging_context *msg_ctx;
 353         struct pf_worker_data *pf;
 354         int listen_fd_size;
 355         int *listen_fds;
 356
 357         bool listening;
 358 };
 359
 360 static void spoolss_next_client(void *pvt);
 361
 362 static int spoolss_children_main(struct tevent_context *ev_ctx,
 363                                  struct messaging_context *msg_ctx,
 364                                  struct pf_worker_data *pf,
 365                                  int child_id,
 366                                  int listen_fd_size,
 367                                  int *listen_fds,
 368                                  void *private_data)
 369 {
 370         struct spoolss_children_data *data;
 371         bool ok;
 372         int ret;
 373
 374         ok = spoolss_child_init(ev_ctx, child_id, pf);
 375         if (!ok) {
 376                 return 1;
 377         }
 378
 379         data = talloc(ev_ctx, struct spoolss_children_data);
 380         if (!data) {
 381                 return 1;
 382         }
 383         data->pf = pf;
 384         data->ev_ctx = ev_ctx;
 385         data->msg_ctx = msg_ctx;
 386         data->listen_fd_size = listen_fd_size;
 387         data->listen_fds = listen_fds;
 388         data->listening = false;
 389
 390         /* loop until it is time to exit */
 391         while (pf->status != PF_WORKER_EXITING) {
 392                 /* try to see if it is time to schedule the next client */
 393                 spoolss_next_client(data);
 394
 395                 ret = tevent_loop_once(ev_ctx);
 396                 if (ret != 0) {
 397                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 398                                   ret, strerror(errno)));
 399                         pf->status = PF_WORKER_EXITING;
 400                 }
 401         }
 402
 403         return ret;
 404 }
 405
 406 static void spoolss_client_terminated(void *pvt)
 407 {
 408         struct spoolss_children_data *data;
 409
 410         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 411
 412         if (data->pf->num_clients) {
 413                 data->pf->num_clients--;
 414         } else {
 415                 DEBUG(2, ("Invalid num clients, aborting!\n"));
 416                 data->pf->status = PF_WORKER_EXITING;
 417                 return;
 418         }
 419
 420         spoolss_next_client(pvt);
 421 }
 422
 423 struct spoolss_new_client {
 424         struct spoolss_children_data *data;
 425         struct tsocket_address *srv_addr;
 426         struct tsocket_address *cli_addr;
 427 };
 428
 429 static void spoolss_handle_client(struct tevent_req *req);
 430
 431 static void spoolss_next_client(void *pvt)
 432 {
 433         struct tevent_req *req;
 434         struct spoolss_children_data *data;
 435         struct spoolss_new_client *next;
 436
 437         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 438
 439         if (data->pf->num_clients == 0) {
 440                 data->pf->status = PF_WORKER_IDLE;
 441         }
 442
 443         if (data->pf->cmds == PF_SRV_MSG_EXIT) {
 444                 DEBUG(2, ("Parent process commands we terminate!\n"));
 445                 return;
 446         }
 447
 448         if (data->listening ||
 449             data->pf->num_clients >= data->pf->allowed_clients) {
 450                 /* nothing to do for now we are already listening
 451                  * or reached the number of clients we are allowed
 452                  * to handle in parallel */
 453                 return;
 454         }
 455
 456         next = talloc_zero(data, struct spoolss_new_client);
 457         if (!next) {
 458                 DEBUG(1, ("Out of memory!?\n"));
 459                 return;
 460         }
 461         next->data = data;
 462
 463         req = prefork_listen_send(next, data->ev_ctx, data->pf,
 464                                   data->listen_fd_size,
 465                                   data->listen_fds);
 466         if (!req) {
 467                 DEBUG(1, ("Failed to make listening request!?\n"));
 468                 talloc_free(next);
 469                 return;
 470         }
 471         tevent_req_set_callback(req, spoolss_handle_client, next);
 472
 473         data->listening = true;
 474 }
 475
 476 static void spoolss_handle_client(struct tevent_req *req)
 477 {
 478         struct spoolss_children_data *data;
 479         struct spoolss_new_client *client;
 480         int ret;
 481         int sd;
 482
 483         client = tevent_req_callback_data(req, struct spoolss_new_client);
 484         data = client->data;
 485
 486         ret = prefork_listen_recv(req, client, &sd,
 487                                   &client->srv_addr, &client->cli_addr);
 488
 489         /* this will free the request too */
 490         talloc_free(client);
 491         /* we are done listening */
 492         data->listening = false;
 493
 494         if (ret != 0) {
 495                 DEBUG(6, ("No client connection was available after all!\n"));
 496                 return;
 497         }
 498
 499         DEBUG(2, ("Spoolss preforked child %d got client connection!\n",
 500                   (int)(data->pf->pid)));
 501
 502         named_pipe_accept_function(data->ev_ctx, data->msg_ctx,
 503                                    SPOOLSS_PIPE_NAME, sd,
 504                                    spoolss_client_terminated, data);
 505 }
 506
 507 /* ==== Main Process Functions ==== */
 508
 509 extern pid_t background_lpq_updater_pid;
 510 static char *bq_logfile;
 511
 512 static void check_updater_child(void)
 513 {
 514         int status;
 515         pid_t pid;
 516
 517         if (background_lpq_updater_pid == -1) {
 518                 return;
 519         }
 520
 521         pid = sys_waitpid(background_lpq_updater_pid, &status, WNOHANG);
 522         if (pid > 0) {
 523                 DEBUG(2, ("The background queue child died... Restarting!\n"));
 524                 pid = start_background_queue(server_event_context(),
 525                                              server_messaging_context(),
 526                                              bq_logfile);
 527                 background_lpq_updater_pid = pid;
 528         }
 529 }
 530
 531 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 532                                     struct messaging_context *msg_ctx,
 533                                     struct timeval current_time);
 534 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 535                                     struct tevent_timer *te,
 536                                     struct timeval current_time,
 537                                     void *pvt);
 538
 539 static void spoolssd_sigchld_handler(struct tevent_context *ev_ctx,
 540                                      struct prefork_pool *pfp,
 541                                      void *pvt)
 542 {
 543         struct messaging_context *msg_ctx;
 544
 545         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 546
 547         /* run pool management so we can fork/retire or increase
 548          * the allowed connections per child based on load */
 549         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 550
 551         /* also check if the updater child is alive and well */
 552         check_updater_child();
 553 }
 554
 555 static bool spoolssd_setup_children_monitor(struct tevent_context *ev_ctx,
 556                                             struct messaging_context *msg_ctx)
 557 {
 558         bool ok;
 559
 560         /* add our oun sigchld callback */
 561         prefork_set_sigchld_callback(spoolss_pool,
 562                                      spoolssd_sigchld_handler, msg_ctx);
 563
 564         ok = spoolssd_schedule_check(ev_ctx, msg_ctx,
 565                                      tevent_timeval_current());
 566         return ok;
 567 }
 568
 569 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 570                                     struct messaging_context *msg_ctx,
 571                                     struct timeval current_time)
 572 {
 573         struct tevent_timer *te;
 574         struct timeval next_event;
 575
 576         /* check situation again in 10 seconds */
 577         next_event = tevent_timeval_current_ofs(10, 0);
 578
 579         /* TODO: check when the socket becomes readable, so that children
 580          * are checked only when there is some activity ? */
 581         te = tevent_add_timer(ev_ctx, spoolss_pool, next_event,
 582                                 spoolssd_check_children, msg_ctx);
 583         if (!te) {
 584                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 585                 return false;
 586         }
 587
 588         return true;
 589 }
 590
 591 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 592                                     struct tevent_timer *te,
 593                                     struct timeval current_time,
 594                                     void *pvt)
 595 {
 596         struct messaging_context *msg_ctx;
 597
 598         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 599
 600         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 601
 602         spoolssd_schedule_check(ev_ctx, msg_ctx, current_time);
 603 }
 604
 605 static void print_queue_forward(struct messaging_context *msg,
 606                                 void *private_data,
 607                                 uint32_t msg_type,
 608                                 struct server_id server_id,
 609                                 DATA_BLOB *data)
 610 {
 611         messaging_send_buf(msg, pid_to_procid(background_lpq_updater_pid),
 612                            MSG_PRINTER_UPDATE, data->data, data->length);
 613 }
 614
 615 static char *get_bq_logfile(void)
 616 {
 617         char *lfile = lp_logfile();
 618         int rc;
 619
 620         if (lfile == NULL || lfile[0] == '\0') {
 621                 rc = asprintf(&lfile, "%s/log.%s.bq",
 622                                         get_dyn_LOGFILEBASE(), DAEMON_NAME);
 623         } else {
 624                 rc = asprintf(&lfile, "%s.bq", lp_logfile());
 625         }
 626         if (rc == -1) {
 627                 lfile = NULL;
 628         }
 629         return lfile;
 630 }
 631
 632 pid_t start_spoolssd(struct tevent_context *ev_ctx,
 633                     struct messaging_context *msg_ctx)
 634 {
 635         struct rpc_srv_callbacks spoolss_cb;
 636         struct dcerpc_binding_vector *v;
 637         TALLOC_CTX *mem_ctx;
 638         pid_t pid;
 639         NTSTATUS status;
 640         int listen_fd;
 641         int ret;
 642         bool ok;
 643
 644         DEBUG(1, ("Forking SPOOLSS Daemon\n"));
 645
 646         /*
 647          * Block signals before forking child as it will have to
 648          * set its own handlers. Child will re-enable SIGHUP as
 649          * soon as the handlers are set up.
 650          */
 651         BlockSignals(true, SIGTERM);
 652         BlockSignals(true, SIGHUP);
 653
 654         pid = sys_fork();
 655
 656         if (pid == -1) {
 657                 DEBUG(0, ("Failed to fork SPOOLSS [%s]\n",
 658                            strerror(errno)));
 659         }
 660
 661         /* parent or error */
 662         if (pid != 0) {
 663
 664                 /* Re-enable SIGHUP before returnig */
 665                 BlockSignals(false, SIGTERM);
 666                 BlockSignals(false, SIGHUP);
 667                 return pid;
 668         }
 669
 670         /* child */
 671         close_low_fds(false);
 672
 673         status = reinit_after_fork(msg_ctx,
 674                                    ev_ctx,
 675                                    procid_self(), true);
 676         if (!NT_STATUS_IS_OK(status)) {
 677                 DEBUG(0,("reinit_after_fork() failed\n"));
 678                 smb_panic("reinit_after_fork() failed");
 679         }
 680
 681         spoolss_reopen_logs(0);
 682         pfh_daemon_config(DAEMON_NAME,
 683                           &pf_spoolss_cfg,
 684                           &default_pf_spoolss_cfg);
 685
 686         spoolss_setup_sig_term_handler(ev_ctx);
 687         spoolss_setup_sig_hup_handler(ev_ctx, msg_ctx);
 688
 689         BlockSignals(false, SIGTERM);
 690         BlockSignals(false, SIGHUP);
 691
 692         /* always start the backgroundqueue listner in spoolssd */
 693         bq_logfile = get_bq_logfile();
 694         pid = start_background_queue(ev_ctx, msg_ctx, bq_logfile);
 695         if (pid > 0) {
 696                 background_lpq_updater_pid = pid;
 697         }
 698
 699         /* the listening fd must be created before the children are actually
 700          * forked out. */
 701         listen_fd = create_named_pipe_socket(SPOOLSS_PIPE_NAME);
 702         if (listen_fd == -1) {
 703                 exit(1);
 704         }
 705
 706         ret = listen(listen_fd, pf_spoolss_cfg.max_allowed_clients);
 707         if (ret == -1) {
 708                 DEBUG(0, ("Failed to listen on spoolss pipe - %s\n",
 709                           strerror(errno)));
 710                 exit(1);
 711         }
 712
 713         /* start children before any more initialization is done */
 714         ok = prefork_create_pool(ev_ctx, /* mem_ctx */
 715                                  ev_ctx, msg_ctx,
 716                                  1, &listen_fd,
 717                                  pf_spoolss_cfg.min_children,
 718                                  pf_spoolss_cfg.max_children,
 719                                  &spoolss_children_main, NULL,
 720                                  &spoolss_pool);
 721         if (!ok) {
 722                 exit(1);
 723         }
 724
 725         if (!serverid_register(procid_self(),
 726                                 FLAG_MSG_GENERAL |
 727                                 FLAG_MSG_PRINT_GENERAL)) {
 728                 exit(1);
 729         }
 730
 731         if (!locking_init()) {
 732                 exit(1);
 733         }
 734
 735         messaging_register(msg_ctx, ev_ctx,
 736                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 737         messaging_register(msg_ctx, NULL, MSG_PRINTER_UPDATE,
 738                            print_queue_forward);
 739         messaging_register(msg_ctx, ev_ctx, MSG_PRINTER_PCAP,
 740                            pcap_updated);
 741
 742         /* As soon as messaging is up check if pcap has been loaded already.
 743          * If so then we probably missed a message and should load_printers()
 744          * ourselves. If pcap has not been loaded yet, then ignore, we will get
 745          * a message as soon as the bq process completes the reload. */
 746         if (pcap_cache_loaded()) {
 747                 load_printers(ev_ctx, msg_ctx);
 748         }
 749
 750         mem_ctx = talloc_new(NULL);
 751         if (mem_ctx == NULL) {
 752                 exit(1);
 753         }
 754
 755         /*
 756          * Initialize spoolss with an init function to convert printers first.
 757          * static_init_rpc will try to initialize the spoolss server too but you
 758          * can't register it twice.
 759          */
 760         spoolss_cb.init = spoolss_init_cb;
 761         spoolss_cb.shutdown = spoolss_shutdown_cb;
 762         spoolss_cb.private_data = msg_ctx;
 763
 764         status = rpc_winreg_init(NULL);
 765         if (!NT_STATUS_IS_OK(status)) {
 766                 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
 767                           nt_errstr(status)));
 768                 exit(1);
 769         }
 770
 771         status = rpc_spoolss_init(&spoolss_cb);
 772         if (!NT_STATUS_IS_OK(status)) {
 773                 DEBUG(0, ("Failed to register spoolss rpc inteface! (%s)\n",
 774                           nt_errstr(status)));
 775                 exit(1);
 776         }
 777
 778         status = dcerpc_binding_vector_new(mem_ctx, &v);
 779         if (!NT_STATUS_IS_OK(status)) {
 780                 DEBUG(0, ("Failed to create binding vector (%s)\n",
 781                           nt_errstr(status)));
 782                 exit(1);
 783         }
 784
 785         status = dcerpc_binding_vector_add_np_default(&ndr_table_spoolss, v);
 786         if (!NT_STATUS_IS_OK(status)) {
 787                 DEBUG(0, ("Failed to add np to binding vector (%s)\n",
 788                           nt_errstr(status)));
 789                 exit(1);
 790         }
 791
 792         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_spoolss, v);
 793         if (!NT_STATUS_IS_OK(status)) {
 794                 DEBUG(0, ("Failed to register spoolss endpoint! (%s)\n",
 795                           nt_errstr(status)));
 796                 exit(1);
 797         }
 798
 799         talloc_free(mem_ctx);
 800
 801         ok = spoolssd_setup_children_monitor(ev_ctx, msg_ctx);
 802         if (!ok) {
 803                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 804                 exit(1);
 805         }
 806
 807         DEBUG(1, ("SPOOLSS Daemon Started (%d)\n", getpid()));
 808
 809         pfh_manage_pool(ev_ctx, msg_ctx, &pf_spoolss_cfg, spoolss_pool);
 810
 811         /* loop forever */
 812         ret = tevent_loop_wait(ev_ctx);
 813
 814         /* should not be reached */
 815         DEBUG(0,("spoolssd tevent_loop_wait() exited with %d - %s\n",
 816                  ret, (ret == 0) ? "out of events" : strerror(errno)));
 817         exit(1);
 818 }