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 #define SPOOLSS_ALL_FINE 0x00
  44 #define SPOOLSS_NEW_MAX  0x01
  45 #define SPOLLSS_ENOSPC   0x02
  46
  47 static int spoolss_min_children;
  48 static int spoolss_max_children;
  49 static int spoolss_spawn_rate;
  50 static int spoolss_prefork_status;
  51
  52 static void spoolss_prefork_config(void)
  53 {
  54         static int spoolss_prefork_config_init = false;
  55         const char *prefork_str;
  56         int min, max, rate;
  57         bool use_defaults = false;
  58         int ret;
  59
  60         if (!spoolss_prefork_config_init) {
  61                 spoolss_prefork_status = SPOOLSS_ALL_FINE;
  62                 spoolss_min_children = 0;
  63                 spoolss_max_children = 0;
  64                 spoolss_spawn_rate = 0;
  65                 spoolss_prefork_config_init = true;
  66         }
  67
  68         prefork_str = lp_parm_const_string(GLOBAL_SECTION_SNUM,
  69                                            "spoolssd", "prefork", "none");
  70         if (strcmp(prefork_str, "none") == 0) {
  71                 use_defaults = true;
  72         } else {
  73                 ret = sscanf(prefork_str, "%d:%d:%d", &min, &max, &rate);
  74                 if (ret != 3) {
  75                         DEBUG(0, ("invalid format for spoolssd:prefork!\n"));
  76                         use_defaults = true;
  77                 }
  78         }
  79
  80         if (use_defaults) {
  81                 min = SPOOLSS_MIN_CHILDREN;
  82                 max = SPOOLSS_MAX_CHILDREN;
  83                 rate = SPOOLSS_SPAWN_RATE;
  84         }
  85
  86         if (max > spoolss_max_children && spoolss_max_children != 0) {
  87                 spoolss_prefork_status |= SPOOLSS_NEW_MAX;
  88         }
  89
  90         spoolss_min_children = min;
  91         spoolss_max_children = max;
  92         spoolss_spawn_rate = rate;
  93 }
  94
  95 void start_spoolssd(struct tevent_context *ev_ctx,
  96                     struct messaging_context *msg_ctx);
  97
  98 static void spoolss_reopen_logs(void)
  99 {
 100         char *lfile = lp_logfile();
 101         int rc;
 102
 103         if (lfile == NULL || lfile[0] == '\0') {
 104                 rc = asprintf(&lfile, "%s/log.%s", get_dyn_LOGFILEBASE(), DAEMON_NAME);
 105                 if (rc > 0) {
 106                         lp_set_logfile(lfile);
 107                         SAFE_FREE(lfile);
 108                 }
 109         } else {
 110                 if (strstr(lfile, DAEMON_NAME) == NULL) {
 111                         rc = asprintf(&lfile, "%s.%s", lp_logfile(), DAEMON_NAME);
 112                         if (rc > 0) {
 113                                 lp_set_logfile(lfile);
 114                                 SAFE_FREE(lfile);
 115                         }
 116                 }
 117         }
 118
 119         reopen_logs();
 120 }
 121
 122 static void update_conf(struct tevent_context *ev,
 123                         struct messaging_context *msg)
 124 {
 125         change_to_root_user();
 126         lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
 127         reload_printers(ev, msg);
 128
 129         spoolss_reopen_logs();
 130         spoolss_prefork_config();
 131 }
 132
 133 static void smb_conf_updated(struct messaging_context *msg,
 134                              void *private_data,
 135                              uint32_t msg_type,
 136                              struct server_id server_id,
 137                              DATA_BLOB *data)
 138 {
 139         struct tevent_context *ev_ctx = talloc_get_type_abort(private_data,
 140                                                              struct tevent_context);
 141
 142         DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
 143         update_conf(ev_ctx, msg);
 144 }
 145
 146 static void spoolss_sig_term_handler(struct tevent_context *ev,
 147                                      struct tevent_signal *se,
 148                                      int signum,
 149                                      int count,
 150                                      void *siginfo,
 151                                      void *private_data)
 152 {
 153         exit_server_cleanly("termination signal");
 154 }
 155
 156 static void spoolss_setup_sig_term_handler(struct tevent_context *ev_ctx)
 157 {
 158         struct tevent_signal *se;
 159
 160         se = tevent_add_signal(ev_ctx,
 161                                ev_ctx,
 162                                SIGTERM, 0,
 163                                spoolss_sig_term_handler,
 164                                NULL);
 165         if (!se) {
 166                 exit_server("failed to setup SIGTERM handler");
 167         }
 168 }
 169
 170 struct spoolss_hup_ctx {
 171         struct messaging_context *msg_ctx;
 172         struct prefork_pool *pfp;
 173 };
 174
 175 static void spoolss_sig_hup_handler(struct tevent_context *ev,
 176                                     struct tevent_signal *se,
 177                                     int signum,
 178                                     int count,
 179                                     void *siginfo,
 180                                     void *pvt)
 181 {
 182         struct spoolss_hup_ctx *hup_ctx;
 183
 184         hup_ctx = talloc_get_type_abort(pvt, struct spoolss_hup_ctx);
 185
 186         DEBUG(1,("Reloading printers after SIGHUP\n"));
 187         update_conf(ev, hup_ctx->msg_ctx);
 188
 189         /* relay to all children */
 190         prefork_send_signal_to_all(hup_ctx->pfp, SIGHUP);
 191 }
 192
 193 static void spoolss_setup_sig_hup_handler(struct tevent_context *ev_ctx,
 194                                           struct prefork_pool *pfp,
 195                                           struct messaging_context *msg_ctx)
 196 {
 197         struct spoolss_hup_ctx *hup_ctx;
 198         struct tevent_signal *se;
 199
 200         hup_ctx = talloc(ev_ctx, struct spoolss_hup_ctx);
 201         if (!hup_ctx) {
 202                 exit_server("failed to setup SIGHUP handler");
 203         }
 204         hup_ctx->pfp = pfp;
 205         hup_ctx->msg_ctx = msg_ctx;
 206
 207         se = tevent_add_signal(ev_ctx,
 208                                ev_ctx,
 209                                SIGHUP, 0,
 210                                spoolss_sig_hup_handler,
 211                                hup_ctx);
 212         if (!se) {
 213                 exit_server("failed to setup SIGHUP handler");
 214         }
 215 }
 216
 217 static bool spoolss_init_cb(void *ptr)
 218 {
 219         struct messaging_context *msg_ctx = talloc_get_type_abort(
 220                 ptr, struct messaging_context);
 221
 222         return nt_printing_tdb_migrate(msg_ctx);
 223 }
 224
 225 static bool spoolss_shutdown_cb(void *ptr)
 226 {
 227         srv_spoolss_cleanup();
 228
 229         return true;
 230 }
 231
 232 /* Childrens */
 233
 234 struct spoolss_chld_sig_hup_ctx {
 235         struct messaging_context *msg_ctx;
 236         struct pf_worker_data *pf;
 237 };
 238
 239 static void spoolss_chld_sig_hup_handler(struct tevent_context *ev,
 240                                          struct tevent_signal *se,
 241                                          int signum,
 242                                          int count,
 243                                          void *siginfo,
 244                                          void *pvt)
 245 {
 246         struct spoolss_chld_sig_hup_ctx *shc;
 247
 248         shc = talloc_get_type_abort(pvt, struct spoolss_chld_sig_hup_ctx);
 249
 250         /* avoid wasting CPU cycles if we are going to exit soon anyways */
 251         if (shc->pf != NULL &&
 252             shc->pf->cmds == PF_SRV_MSG_EXIT) {
 253                 return;
 254         }
 255
 256         change_to_root_user();
 257         DEBUG(1,("Reloading printers after SIGHUP\n"));
 258         reload_printers(ev, shc->msg_ctx);
 259         spoolss_reopen_logs();
 260 }
 261
 262 static bool spoolss_setup_chld_hup_handler(struct tevent_context *ev_ctx,
 263                                            struct pf_worker_data *pf,
 264                                            struct messaging_context *msg_ctx)
 265 {
 266         struct spoolss_chld_sig_hup_ctx *shc;
 267         struct tevent_signal *se;
 268
 269         shc = talloc(ev_ctx, struct spoolss_chld_sig_hup_ctx);
 270         if (!shc) {
 271                 DEBUG(1, ("failed to setup SIGHUP handler"));
 272                 return false;
 273         }
 274         shc->pf = pf;
 275         shc->msg_ctx = msg_ctx;
 276
 277         se = tevent_add_signal(ev_ctx,
 278                                ev_ctx,
 279                                SIGHUP, 0,
 280                                spoolss_chld_sig_hup_handler,
 281                                shc);
 282         if (!se) {
 283                 DEBUG(1, ("failed to setup SIGHUP handler"));
 284                 return false;
 285         }
 286
 287         return true;
 288 }
 289
 290 static bool spoolss_child_init(struct tevent_context *ev_ctx,
 291                                         struct pf_worker_data *pf)
 292 {
 293         NTSTATUS status;
 294         struct rpc_srv_callbacks spoolss_cb;
 295         struct messaging_context *msg_ctx = server_messaging_context();
 296         bool ok;
 297
 298         status = reinit_after_fork(msg_ctx, ev_ctx,
 299                                    procid_self(), true);
 300         if (!NT_STATUS_IS_OK(status)) {
 301                 DEBUG(0,("reinit_after_fork() failed\n"));
 302                 smb_panic("reinit_after_fork() failed");
 303         }
 304
 305         spoolss_reopen_logs();
 306
 307         ok = spoolss_setup_chld_hup_handler(ev_ctx, pf, msg_ctx);
 308         if (!ok) {
 309                 return false;
 310         }
 311
 312         if (!serverid_register(procid_self(), FLAG_MSG_GENERAL)) {
 313                 return false;
 314         }
 315
 316         if (!locking_init()) {
 317                 return false;
 318         }
 319
 320         messaging_register(msg_ctx, ev_ctx,
 321                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 322
 323         /* try to reinit rpc queues */
 324         spoolss_cb.init = spoolss_init_cb;
 325         spoolss_cb.shutdown = spoolss_shutdown_cb;
 326         spoolss_cb.private_data = msg_ctx;
 327
 328         status = rpc_winreg_init(NULL);
 329         if (!NT_STATUS_IS_OK(status)) {
 330                 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
 331                           nt_errstr(status)));
 332                 return false;
 333         }
 334
 335         status = rpc_spoolss_init(&spoolss_cb);
 336         if (!NT_STATUS_IS_OK(status)) {
 337                 DEBUG(0, ("Failed to register spoolss rpc inteface! (%s)\n",
 338                           nt_errstr(status)));
 339                 return false;
 340         }
 341
 342         reload_printers(ev_ctx, msg_ctx);
 343
 344         return true;
 345 }
 346
 347 struct spoolss_children_data {
 348         struct tevent_context *ev_ctx;
 349         struct messaging_context *msg_ctx;
 350         struct pf_worker_data *pf;
 351         int listen_fd_size;
 352         int *listen_fds;
 353         int lock_fd;
 354
 355         bool listening;
 356 };
 357
 358 static void spoolss_next_client(void *pvt);
 359
 360 static int spoolss_children_main(struct tevent_context *ev_ctx,
 361                                  struct pf_worker_data *pf,
 362                                  int listen_fd_size,
 363                                  int *listen_fds,
 364                                  int lock_fd,
 365                                  void *private_data)
 366 {
 367         struct messaging_context *msg_ctx = server_messaging_context();
 368         struct spoolss_children_data *data;
 369         bool ok;
 370         int ret;
 371
 372         ok = spoolss_child_init(ev_ctx, pf);
 373         if (!ok) {
 374                 return 1;
 375         }
 376
 377         data = talloc(ev_ctx, struct spoolss_children_data);
 378         if (!data) {
 379                 return 1;
 380         }
 381         data->pf = pf;
 382         data->ev_ctx = ev_ctx;
 383         data->msg_ctx = msg_ctx;
 384         data->lock_fd = lock_fd;
 385         data->listen_fd_size = listen_fd_size;
 386         data->listen_fds = listen_fds;
 387         data->listening = false;
 388
 389         /* loop until it is time to exit */
 390         while (pf->status != PF_WORKER_EXITING) {
 391                 /* try to see if it is time to schedule the next client */
 392                 spoolss_next_client(data);
 393
 394                 ret = tevent_loop_once(ev_ctx);
 395                 if (ret != 0) {
 396                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 397                                   ret, strerror(errno)));
 398                         pf->status = PF_WORKER_EXITING;
 399                 }
 400         }
 401
 402         return ret;
 403 }
 404
 405 static void spoolss_client_terminated(void *pvt)
 406 {
 407         struct spoolss_children_data *data;
 408
 409         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 410
 411         if (data->pf->num_clients) {
 412                 data->pf->num_clients--;
 413         } else {
 414                 DEBUG(2, ("Invalid num clients, aborting!\n"));
 415                 data->pf->status = PF_WORKER_EXITING;
 416                 return;
 417         }
 418
 419         spoolss_next_client(pvt);
 420 }
 421
 422 struct spoolss_new_client {
 423         struct spoolss_children_data *data;
 424         struct sockaddr_un sunaddr;
 425         socklen_t addrlen;
 426 };
 427
 428 static void spoolss_handle_client(struct tevent_req *req);
 429
 430 static void spoolss_next_client(void *pvt)
 431 {
 432         struct tevent_req *req;
 433         struct spoolss_children_data *data;
 434         struct spoolss_new_client *next;
 435
 436         data = talloc_get_type_abort(pvt, struct spoolss_children_data);
 437
 438         if (data->pf->num_clients == 0) {
 439                 data->pf->status = PF_WORKER_IDLE;
 440         }
 441
 442         if (data->pf->cmds == PF_SRV_MSG_EXIT) {
 443                 DEBUG(2, ("Parent process commands we terminate!\n"));
 444                 return;
 445         }
 446
 447         if (data->listening ||
 448             data->pf->num_clients >= data->pf->allowed_clients) {
 449                 /* nothing to do for now we are already listening
 450                  * or reached the number of clients we are allowed
 451                  * to handle in parallel */
 452                 return;
 453         }
 454
 455         next = talloc_zero(data, struct spoolss_new_client);
 456         if (!next) {
 457                 DEBUG(1, ("Out of memory!?\n"));
 458                 return;
 459         }
 460         next->data = data;
 461         next->addrlen = sizeof(next->sunaddr);
 462
 463         req = prefork_listen_send(next, data->ev_ctx, data->pf,
 464                                   data->listen_fd_size,
 465                                   data->listen_fds,
 466                                   data->lock_fd,
 467                                   (struct sockaddr *)&next->sunaddr,
 468                                   &next->addrlen);
 469         if (!req) {
 470                 DEBUG(1, ("Failed to make listening request!?\n"));
 471                 talloc_free(next);
 472                 return;
 473         }
 474         tevent_req_set_callback(req, spoolss_handle_client, next);
 475
 476         data->listening = true;
 477 }
 478
 479 static void spoolss_handle_client(struct tevent_req *req)
 480 {
 481         struct spoolss_children_data *data;
 482         struct spoolss_new_client *client;
 483         int ret;
 484         int sd;
 485
 486         client = tevent_req_callback_data(req, struct spoolss_new_client);
 487         data = client->data;
 488
 489         ret = prefork_listen_recv(req, &sd);
 490
 491         /* this will free the request too */
 492         talloc_free(client);
 493         /* we are done listening */
 494         data->listening = false;
 495
 496         if (ret > 0) {
 497                 DEBUG(1, ("Failed to accept client connection!\n"));
 498                 /* bail out if we are not serving any other client */
 499                 if (data->pf->num_clients == 0) {
 500                         data->pf->status = PF_WORKER_EXITING;
 501                 }
 502                 return;
 503         }
 504
 505         if (ret == -2) {
 506                 DEBUG(1, ("Server asks us to die!\n"));
 507                 data->pf->status = PF_WORKER_EXITING;
 508                 return;
 509         }
 510
 511         DEBUG(2, ("Spoolss preforked child %d got client connection!\n",
 512                   (int)(data->pf->pid)));
 513
 514         named_pipe_accept_function(data->ev_ctx, data->msg_ctx,
 515                                    SPOOLSS_PIPE_NAME, sd,
 516                                    spoolss_client_terminated, data);
 517 }
 518
 519 /* ==== Main Process Functions ==== */
 520
 521 static void spoolssd_sig_chld_handler(struct tevent_context *ev_ctx,
 522                                       struct tevent_signal *se,
 523                                       int signum, int count,
 524                                       void *siginfo, void *pvt)
 525 {
 526         struct prefork_pool *pfp;
 527         int active, total;
 528         int n, r;
 529
 530         pfp = talloc_get_type_abort(pvt, struct prefork_pool);
 531
 532         /* run the cleanup function to make sure all dead children are
 533          * properly and timely retired. */
 534         prefork_cleanup_loop(pfp);
 535
 536         /* now check we do not descend below the minimum */
 537         active = prefork_count_active_children(pfp, &total);
 538
 539         n = 0;
 540         if (total < spoolss_min_children) {
 541                 n = total - spoolss_min_children;
 542         } else if (total - active < (total / 4)) {
 543                 n = spoolss_min_children;
 544         }
 545
 546         if (n > 0) {
 547                 r = prefork_add_children(ev_ctx, pfp, n);
 548                 if (r < n) {
 549                         DEBUG(10, ("Tried to start %d children but only,"
 550                                    "%d were actually started.!\n", n, r));
 551                 }
 552         }
 553
 554
 555 }
 556
 557 static bool spoolssd_setup_sig_chld_handler(struct tevent_context *ev_ctx,
 558                                             struct prefork_pool *pfp)
 559 {
 560         struct tevent_signal *se;
 561
 562         se = tevent_add_signal(ev_ctx, ev_ctx, SIGCHLD, 0,
 563                                 spoolssd_sig_chld_handler, pfp);
 564         if (!se) {
 565                 DEBUG(0, ("Failed to setup SIGCHLD handler!\n"));
 566                 return false;
 567         }
 568
 569         return true;
 570 }
 571
 572 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 573                                     struct prefork_pool *pfp,
 574                                     struct timeval current_time);
 575 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 576                                     struct tevent_timer *te,
 577                                     struct timeval current_time,
 578                                     void *pvt);
 579
 580 static bool spoolssd_setup_children_monitor(struct tevent_context *ev_ctx,
 581                                             struct prefork_pool *pfp)
 582 {
 583         bool ok;
 584
 585         ok = spoolssd_setup_sig_chld_handler(ev_ctx, pfp);
 586         if (!ok) {
 587                 return false;
 588         }
 589
 590         ok = spoolssd_schedule_check(ev_ctx, pfp, tevent_timeval_current());
 591         return ok;
 592 }
 593
 594 static bool spoolssd_schedule_check(struct tevent_context *ev_ctx,
 595                                     struct prefork_pool *pfp,
 596                                     struct timeval current_time)
 597 {
 598         struct tevent_timer *te;
 599         struct timeval next_event;
 600
 601         /* check situation again in 10 seconds */
 602         next_event = tevent_timeval_current_ofs(10, 0);
 603
 604         /* check when the socket becomes readable, so that children
 605          * are checked only when there is some activity */
 606         te = tevent_add_timer(ev_ctx, pfp, next_event,
 607                                 spoolssd_check_children, pfp);
 608         if (!te) {
 609                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 610                 return false;
 611         }
 612
 613         return true;
 614 }
 615
 616 static void spoolssd_check_children(struct tevent_context *ev_ctx,
 617                                     struct tevent_timer *te,
 618                                     struct timeval current_time,
 619                                     void *pvt)
 620 {
 621         struct prefork_pool *pfp;
 622         int active, total;
 623         int ret, n;
 624
 625         pfp = talloc_get_type_abort(pvt, struct prefork_pool);
 626
 627         if ((spoolss_prefork_status & SPOOLSS_NEW_MAX) &&
 628             !(spoolss_prefork_status & SPOLLSS_ENOSPC)) {
 629                 ret = prefork_expand_pool(pfp, spoolss_max_children);
 630                 if (ret == ENOSPC) {
 631                         spoolss_prefork_status |= SPOLLSS_ENOSPC;
 632                 }
 633                 spoolss_prefork_status &= ~SPOOLSS_NEW_MAX;
 634         }
 635
 636         active = prefork_count_active_children(pfp, &total);
 637
 638         if (total - active < spoolss_spawn_rate) {
 639                 n = prefork_add_children(ev_ctx, pfp, spoolss_spawn_rate);
 640                 if (n < spoolss_spawn_rate) {
 641                         DEBUG(10, ("Tried to start 5 children but only,"
 642                                    "%d were actually started.!\n", n));
 643                 }
 644         }
 645
 646         if (total - active > spoolss_min_children) {
 647                 if ((total - spoolss_min_children) >= spoolss_spawn_rate) {
 648                         prefork_retire_children(pfp, spoolss_spawn_rate,
 649                                                 time(NULL) - SPOOLSS_MIN_LIFE);
 650                 }
 651         }
 652
 653         ret = spoolssd_schedule_check(ev_ctx, pfp, current_time);
 654 }
 655
 656 void start_spoolssd(struct tevent_context *ev_ctx,
 657                     struct messaging_context *msg_ctx)
 658 {
 659         struct prefork_pool *pool;
 660         struct rpc_srv_callbacks spoolss_cb;
 661         struct dcerpc_binding_vector *v;
 662         TALLOC_CTX *mem_ctx;
 663         pid_t pid;
 664         NTSTATUS status;
 665         int listen_fd;
 666         int ret;
 667         bool ok;
 668
 669         DEBUG(1, ("Forking SPOOLSS Daemon\n"));
 670
 671         pid = sys_fork();
 672
 673         if (pid == -1) {
 674                 DEBUG(0, ("Failed to fork SPOOLSS [%s], aborting ...\n",
 675                            strerror(errno)));
 676                 exit(1);
 677         }
 678
 679         if (pid) {
 680                 /* parent */
 681                 return;
 682         }
 683
 684         /* child */
 685         close_low_fds(false);
 686
 687         status = reinit_after_fork(msg_ctx,
 688                                    ev_ctx,
 689                                    procid_self(), true);
 690         if (!NT_STATUS_IS_OK(status)) {
 691                 DEBUG(0,("reinit_after_fork() failed\n"));
 692                 smb_panic("reinit_after_fork() failed");
 693         }
 694
 695         spoolss_reopen_logs();
 696         spoolss_prefork_config();
 697
 698         /* the listening fd must be created before the children are actually
 699          * forked out. */
 700         listen_fd = create_named_pipe_socket(SPOOLSS_PIPE_NAME);
 701         if (listen_fd == -1) {
 702                 exit(1);
 703         }
 704
 705         ret = listen(listen_fd, spoolss_max_children);
 706         if (ret == -1) {
 707                 DEBUG(0, ("Failed to listen on spoolss pipe - %s\n",
 708                           strerror(errno)));
 709                 exit(1);
 710         }
 711
 712
 713         /* start children before any more initialization is done */
 714         ok = prefork_create_pool(ev_ctx, ev_ctx, 1, &listen_fd,
 715                                  spoolss_min_children,
 716                                  spoolss_max_children,
 717                                  &spoolss_children_main, NULL,
 718                                  &pool);
 719
 720         spoolss_setup_sig_term_handler(ev_ctx);
 721         spoolss_setup_sig_hup_handler(ev_ctx, pool, msg_ctx);
 722
 723         if (!serverid_register(procid_self(),
 724                                 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
 725                                 |FLAG_MSG_PRINT_GENERAL)) {
 726                 exit(1);
 727         }
 728
 729         if (!locking_init()) {
 730                 exit(1);
 731         }
 732
 733         messaging_register(msg_ctx, NULL,
 734                            MSG_PRINTER_UPDATE, print_queue_receive);
 735         messaging_register(msg_ctx, ev_ctx,
 736                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 737
 738         mem_ctx = talloc_new(NULL);
 739         if (mem_ctx == NULL) {
 740                 exit(1);
 741         }
 742
 743         /*
 744          * Initialize spoolss with an init function to convert printers first.
 745          * static_init_rpc will try to initialize the spoolss server too but you
 746          * can't register it twice.
 747          */
 748         spoolss_cb.init = spoolss_init_cb;
 749         spoolss_cb.shutdown = spoolss_shutdown_cb;
 750         spoolss_cb.private_data = msg_ctx;
 751
 752         status = rpc_winreg_init(NULL);
 753         if (!NT_STATUS_IS_OK(status)) {
 754                 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
 755                           nt_errstr(status)));
 756                 exit(1);
 757         }
 758
 759         status = rpc_spoolss_init(&spoolss_cb);
 760         if (!NT_STATUS_IS_OK(status)) {
 761                 DEBUG(0, ("Failed to register spoolss rpc inteface! (%s)\n",
 762                           nt_errstr(status)));
 763                 exit(1);
 764         }
 765
 766         status = dcerpc_binding_vector_new(mem_ctx, &v);
 767         if (!NT_STATUS_IS_OK(status)) {
 768                 DEBUG(0, ("Failed to create binding vector (%s)\n",
 769                           nt_errstr(status)));
 770                 exit(1);
 771         }
 772
 773         status = dcerpc_binding_vector_add_np_default(&ndr_table_spoolss, v);
 774         if (!NT_STATUS_IS_OK(status)) {
 775                 DEBUG(0, ("Failed to add np to binding vector (%s)\n",
 776                           nt_errstr(status)));
 777                 exit(1);
 778         }
 779
 780         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_spoolss, v);
 781         if (!NT_STATUS_IS_OK(status)) {
 782                 DEBUG(0, ("Failed to register spoolss endpoint! (%s)\n",
 783                           nt_errstr(status)));
 784                 exit(1);
 785         }
 786
 787         talloc_free(mem_ctx);
 788
 789         ok = spoolssd_setup_children_monitor(ev_ctx, pool);
 790         if (!ok) {
 791                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 792                 exit(1);
 793         }
 794
 795         reload_printers(ev_ctx, msg_ctx);
 796
 797         DEBUG(1, ("SPOOLSS Daemon Started (%d)\n", getpid()));
 798
 799         /* loop forever */
 800         ret = tevent_loop_wait(ev_ctx);
 801
 802         /* should not be reached */
 803         DEBUG(0,("background_queue: tevent_loop_wait() exited with %d - %s\n",
 804                  ret, (ret == 0) ? "out of events" : strerror(errno)));
 805         exit(1);
 806 }