source3/smbd/server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7    Copyright (C) Volker Lendecke                1993-2007
   8    Copyright (C) Jeremy Allison                 1993-2007
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "system/filesys.h"
  26 #include "lib/util/server_id.h"
  27 #include "popt_common.h"
  28 #include "smbd/smbd.h"
  29 #include "smbd/globals.h"
  30 #include "registry/reg_init_full.h"
  31 #include "libcli/auth/schannel.h"
  32 #include "secrets.h"
  33 #include "../lib/util/memcache.h"
  34 #include "ctdbd_conn.h"
  35 #include "util_cluster.h"
  36 #include "printing/queue_process.h"
  37 #include "rpc_server/rpc_service_setup.h"
  38 #include "rpc_server/rpc_config.h"
  39 #include "passdb.h"
  40 #include "auth.h"
  41 #include "messages.h"
  42 #include "messages_ctdb.h"
  43 #include "smbprofile.h"
  44 #include "lib/id_cache.h"
  45 #include "lib/param/param.h"
  46 #include "lib/background.h"
  47 #include "../lib/util/pidfile.h"
  48 #include "lib/smbd_shim.h"
  49 #include "scavenger.h"
  50 #include "locking/leases_db.h"
  51 #include "smbd/notifyd/notifyd.h"
  52 #include "smbd/smbd_cleanupd.h"
  53 #include "lib/util/sys_rw.h"
  54 #include "cleanupdb.h"
  55 #include "g_lock.h"
  56 #include "rpc_server/epmd.h"
  57 #include "rpc_server/lsasd.h"
  58 #include "rpc_server/fssd.h"
  59 #include "rpc_server/mdssd.h"
  60
  61 #ifdef CLUSTER_SUPPORT
  62 #include "ctdb_protocol.h"
  63 #endif
  64
  65 struct smbd_open_socket;
  66 struct smbd_child_pid;
  67
  68 struct smbd_parent_context {
  69         bool interactive;
  70
  71         struct tevent_context *ev_ctx;
  72         struct messaging_context *msg_ctx;
  73
  74         /* the list of listening sockets */
  75         struct smbd_open_socket *sockets;
  76
  77         /* the list of current child processes */
  78         struct smbd_child_pid *children;
  79         size_t num_children;
  80
  81         struct server_id cleanupd;
  82         struct server_id notifyd;
  83
  84         struct tevent_timer *cleanup_te;
  85 };
  86
  87 struct smbd_open_socket {
  88         struct smbd_open_socket *prev, *next;
  89         struct smbd_parent_context *parent;
  90         int fd;
  91         struct tevent_fd *fde;
  92 };
  93
  94 struct smbd_child_pid {
  95         struct smbd_child_pid *prev, *next;
  96         pid_t pid;
  97 };
  98
  99 /*******************************************************************
 100  What to do when smb.conf is updated.
 101  ********************************************************************/
 102
 103 static void smbd_parent_conf_updated(struct messaging_context *msg,
 104                                      void *private_data,
 105                                      uint32_t msg_type,
 106                                      struct server_id server_id,
 107                                      DATA_BLOB *data)
 108 {
 109         struct tevent_context *ev_ctx =
 110                 talloc_get_type_abort(private_data, struct tevent_context);
 111         bool ok;
 112
 113         DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
 114                   "updated. Reloading.\n"));
 115         change_to_root_user();
 116         reload_services(NULL, NULL, false);
 117         printing_subsystem_update(ev_ctx, msg, false);
 118
 119         ok = reinit_guest_session_info(NULL);
 120         if (!ok) {
 121                 DBG_ERR("Failed to reinit guest info\n");
 122         }
 123 }
 124
 125 /*******************************************************************
 126  Delete a statcache entry.
 127  ********************************************************************/
 128
 129 static void smb_stat_cache_delete(struct messaging_context *msg,
 130                                   void *private_data,
 131                                   uint32_t msg_tnype,
 132                                   struct server_id server_id,
 133                                   DATA_BLOB *data)
 134 {
 135         const char *name = (const char *)data->data;
 136         DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
 137         stat_cache_delete(name);
 138 }
 139
 140 /****************************************************************************
 141   Send a SIGTERM to our process group.
 142 *****************************************************************************/
 143
 144 static void  killkids(void)
 145 {
 146         if(am_parent) kill(0,SIGTERM);
 147 }
 148
 149 static void msg_exit_server(struct messaging_context *msg,
 150                             void *private_data,
 151                             uint32_t msg_type,
 152                             struct server_id server_id,
 153                             DATA_BLOB *data)
 154 {
 155         DEBUG(3, ("got a SHUTDOWN message\n"));
 156         exit_server_cleanly(NULL);
 157 }
 158
 159 #ifdef DEVELOPER
 160 static void msg_inject_fault(struct messaging_context *msg,
 161                              void *private_data,
 162                              uint32_t msg_type,
 163                              struct server_id src,
 164                              DATA_BLOB *data)
 165 {
 166         int sig;
 167         struct server_id_buf tmp;
 168
 169         if (data->length != sizeof(sig)) {
 170                 DEBUG(0, ("Process %s sent bogus signal injection request\n",
 171                           server_id_str_buf(src, &tmp)));
 172                 return;
 173         }
 174
 175         sig = *(int *)data->data;
 176         if (sig == -1) {
 177                 exit_server("internal error injected");
 178                 return;
 179         }
 180
 181 #ifdef HAVE_STRSIGNAL
 182         DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
 183                   server_id_str_buf(src, &tmp), sig, strsignal(sig)));
 184 #else
 185         DEBUG(0, ("Process %s requested injection of signal %d\n",
 186                   server_id_str_buf(src, &tmp), sig));
 187 #endif
 188
 189         kill(getpid(), sig);
 190 }
 191 #endif /* DEVELOPER */
 192
 193 #if defined(DEVELOPER) || defined(ENABLE_SELFTEST)
 194 /*
 195  * Sleep for the specified number of seconds.
 196  */
 197 static void msg_sleep(struct messaging_context *msg,
 198                       void *private_data,
 199                       uint32_t msg_type,
 200                       struct server_id src,
 201                       DATA_BLOB *data)
 202 {
 203         unsigned int seconds;
 204         struct server_id_buf tmp;
 205
 206         if (data->length != sizeof(seconds)) {
 207                 DBG_ERR("Process %s sent bogus sleep request\n",
 208                         server_id_str_buf(src, &tmp));
 209                 return;
 210         }
 211
 212         seconds = *(unsigned int *)data->data;
 213         DBG_ERR("Process %s request a sleep of %u seconds\n",
 214                 server_id_str_buf(src, &tmp),
 215                 seconds);
 216         sleep(seconds);
 217         DBG_ERR("Restarting after %u second sleep requested by process %s\n",
 218                 seconds,
 219                 server_id_str_buf(src, &tmp));
 220 }
 221 #endif /* DEVELOPER */
 222
 223 static NTSTATUS messaging_send_to_children(struct messaging_context *msg_ctx,
 224                                            uint32_t msg_type, DATA_BLOB* data)
 225 {
 226         NTSTATUS status;
 227         struct smbd_parent_context *parent = am_parent;
 228         struct smbd_child_pid *child;
 229
 230         if (parent == NULL) {
 231                 return NT_STATUS_INTERNAL_ERROR;
 232         }
 233
 234         for (child = parent->children; child != NULL; child = child->next) {
 235                 status = messaging_send(parent->msg_ctx,
 236                                         pid_to_procid(child->pid),
 237                                         msg_type, data);
 238                 if (!NT_STATUS_IS_OK(status)) {
 239                         DBG_DEBUG("messaging_send(%d) failed: %s\n",
 240                                   (int)child->pid, nt_errstr(status));
 241                 }
 242         }
 243         return NT_STATUS_OK;
 244 }
 245
 246 static void smb_parent_send_to_children(struct messaging_context *ctx,
 247                                         void* data,
 248                                         uint32_t msg_type,
 249                                         struct server_id srv_id,
 250                                         DATA_BLOB* msg_data)
 251 {
 252         messaging_send_to_children(ctx, msg_type, msg_data);
 253 }
 254
 255 /*
 256  * Parent smbd process sets its own debug level first and then
 257  * sends a message to all the smbd children to adjust their debug
 258  * level to that of the parent.
 259  */
 260
 261 static void smbd_msg_debug(struct messaging_context *msg_ctx,
 262                            void *private_data,
 263                            uint32_t msg_type,
 264                            struct server_id server_id,
 265                            DATA_BLOB *data)
 266 {
 267         debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
 268
 269         messaging_send_to_children(msg_ctx, MSG_DEBUG, data);
 270 }
 271
 272 static void smbd_parent_id_cache_kill(struct messaging_context *msg_ctx,
 273                                       void *private_data,
 274                                       uint32_t msg_type,
 275                                       struct server_id server_id,
 276                                       DATA_BLOB* data)
 277 {
 278         const char *msg = (data && data->data)
 279                 ? (const char *)data->data : "<NULL>";
 280         struct id_cache_ref id;
 281
 282         if (!id_cache_ref_parse(msg, &id)) {
 283                 DEBUG(0, ("Invalid ?ID: %s\n", msg));
 284                 return;
 285         }
 286
 287         id_cache_delete_from_cache(&id);
 288
 289         messaging_send_to_children(msg_ctx, msg_type, data);
 290 }
 291
 292 static void smbd_parent_id_cache_delete(struct messaging_context *ctx,
 293                                         void* data,
 294                                         uint32_t msg_type,
 295                                         struct server_id srv_id,
 296                                         DATA_BLOB* msg_data)
 297 {
 298         id_cache_delete_message(ctx, data, msg_type, srv_id, msg_data);
 299
 300         messaging_send_to_children(ctx, msg_type, msg_data);
 301 }
 302
 303 static void add_child_pid(struct smbd_parent_context *parent,
 304                           pid_t pid)
 305 {
 306         struct smbd_child_pid *child;
 307
 308         child = talloc_zero(parent, struct smbd_child_pid);
 309         if (child == NULL) {
 310                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
 311                 return;
 312         }
 313         child->pid = pid;
 314         DLIST_ADD(parent->children, child);
 315         parent->num_children += 1;
 316 }
 317
 318 static void smb_tell_num_children(struct messaging_context *ctx, void *data,
 319                                   uint32_t msg_type, struct server_id srv_id,
 320                                   DATA_BLOB *msg_data)
 321 {
 322         uint8_t buf[sizeof(uint32_t)];
 323
 324         if (am_parent) {
 325                 SIVAL(buf, 0, am_parent->num_children);
 326                 messaging_send_buf(ctx, srv_id, MSG_SMB_NUM_CHILDREN,
 327                                    buf, sizeof(buf));
 328         }
 329 }
 330
 331 static void notifyd_stopped(struct tevent_req *req);
 332
 333 static struct tevent_req *notifyd_req(struct messaging_context *msg_ctx,
 334                                       struct tevent_context *ev)
 335 {
 336         struct tevent_req *req;
 337         sys_notify_watch_fn sys_notify_watch = NULL;
 338         struct sys_notify_context *sys_notify_ctx = NULL;
 339         struct ctdbd_connection *ctdbd_conn = NULL;
 340
 341         if (lp_kernel_change_notify()) {
 342
 343 #ifdef HAVE_INOTIFY
 344                 if (lp_parm_bool(-1, "notify", "inotify", true)) {
 345                         sys_notify_watch = inotify_watch;
 346                 }
 347 #endif
 348
 349 #ifdef HAVE_FAM
 350                 if (lp_parm_bool(-1, "notify", "fam",
 351                                  (sys_notify_watch == NULL))) {
 352                         sys_notify_watch = fam_watch;
 353                 }
 354 #endif
 355         }
 356
 357         if (sys_notify_watch != NULL) {
 358                 sys_notify_ctx = sys_notify_context_create(msg_ctx, ev);
 359                 if (sys_notify_ctx == NULL) {
 360                         return NULL;
 361                 }
 362         }
 363
 364         if (lp_clustering()) {
 365                 ctdbd_conn = messaging_ctdb_connection();
 366         }
 367
 368         req = notifyd_send(msg_ctx, ev, msg_ctx, ctdbd_conn,
 369                            sys_notify_watch, sys_notify_ctx);
 370         if (req == NULL) {
 371                 TALLOC_FREE(sys_notify_ctx);
 372                 return NULL;
 373         }
 374         tevent_req_set_callback(req, notifyd_stopped, msg_ctx);
 375
 376         return req;
 377 }
 378
 379 static void notifyd_stopped(struct tevent_req *req)
 380 {
 381         int ret;
 382
 383         ret = notifyd_recv(req);
 384         TALLOC_FREE(req);
 385         DEBUG(1, ("notifyd stopped: %s\n", strerror(ret)));
 386 }
 387
 388 static void notifyd_sig_hup_handler(struct tevent_context *ev,
 389                                     struct tevent_signal *se,
 390                                     int signum,
 391                                     int count,
 392                                     void *siginfo,
 393                                     void *pvt)
 394 {
 395         DBG_NOTICE("notifyd: Reloading services after SIGHUP\n");
 396         reload_services(NULL, NULL, false);
 397 }
 398
 399 static bool smbd_notifyd_init(struct messaging_context *msg, bool interactive,
 400                               struct server_id *ppid)
 401 {
 402         struct tevent_context *ev = messaging_tevent_context(msg);
 403         struct tevent_req *req;
 404         pid_t pid;
 405         NTSTATUS status;
 406         bool ok;
 407         struct tevent_signal *se;
 408
 409         if (interactive) {
 410                 req = notifyd_req(msg, ev);
 411                 return (req != NULL);
 412         }
 413
 414         pid = fork();
 415         if (pid == -1) {
 416                 DEBUG(1, ("%s: fork failed: %s\n", __func__,
 417                           strerror(errno)));
 418                 return false;
 419         }
 420
 421         if (pid != 0) {
 422                 if (am_parent != 0) {
 423                         add_child_pid(am_parent, pid);
 424                 }
 425                 *ppid = pid_to_procid(pid);
 426                 return true;
 427         }
 428
 429         status = smbd_reinit_after_fork(msg, ev, true, "smbd-notifyd");
 430         if (!NT_STATUS_IS_OK(status)) {
 431                 DEBUG(1, ("%s: reinit_after_fork failed: %s\n",
 432                           __func__, nt_errstr(status)));
 433                 exit(1);
 434         }
 435
 436         /* Set up sighup handler for notifyd */
 437         se = tevent_add_signal(ev,
 438                                ev,
 439                                SIGHUP, 0,
 440                                notifyd_sig_hup_handler,
 441                                NULL);
 442         if (!se) {
 443                 DEBUG(0, ("failed to setup notifyd SIGHUP handler\n"));
 444                 exit(1);
 445         }
 446
 447         req = notifyd_req(msg, ev);
 448         if (req == NULL) {
 449                 exit(1);
 450         }
 451         tevent_req_set_callback(req, notifyd_stopped, msg);
 452
 453         /* Block those signals that we are not handling */
 454         BlockSignals(True, SIGUSR1);
 455
 456         messaging_send(msg, pid_to_procid(getppid()), MSG_SMB_NOTIFY_STARTED,
 457                        NULL);
 458
 459         ok = tevent_req_poll(req, ev);
 460         if (!ok) {
 461                 DBG_WARNING("tevent_req_poll returned %s\n", strerror(errno));
 462                 exit(1);
 463         }
 464         exit(0);
 465 }
 466
 467 static void notifyd_init_trigger(struct tevent_req *req);
 468
 469 struct notifyd_init_state {
 470         bool ok;
 471         struct tevent_context *ev;
 472         struct messaging_context *msg;
 473         struct server_id *ppid;
 474 };
 475
 476 static struct tevent_req *notifyd_init_send(struct tevent_context *ev,
 477                                             TALLOC_CTX *mem_ctx,
 478                                             struct messaging_context *msg,
 479                                             struct server_id *ppid)
 480 {
 481         struct tevent_req *req = NULL;
 482         struct tevent_req *subreq = NULL;
 483         struct notifyd_init_state *state = NULL;
 484
 485         req = tevent_req_create(mem_ctx, &state, struct notifyd_init_state);
 486         if (req == NULL) {
 487                 return NULL;
 488         }
 489
 490         *state = (struct notifyd_init_state) {
 491                 .msg = msg,
 492                 .ev = ev,
 493                 .ppid = ppid
 494         };
 495
 496         subreq = tevent_wakeup_send(state, ev, tevent_timeval_current_ofs(1, 0));
 497         if (tevent_req_nomem(subreq, req)) {
 498                 return tevent_req_post(req, ev);
 499         }
 500
 501         tevent_req_set_callback(subreq, notifyd_init_trigger, req);
 502         return req;
 503 }
 504
 505 static void notifyd_init_trigger(struct tevent_req *subreq)
 506 {
 507         struct tevent_req *req = tevent_req_callback_data(
 508                 subreq, struct tevent_req);
 509         struct notifyd_init_state *state = tevent_req_data(
 510                 req, struct notifyd_init_state);
 511         bool ok;
 512
 513         DBG_NOTICE("Triggering notifyd startup\n");
 514
 515         ok = tevent_wakeup_recv(subreq);
 516         TALLOC_FREE(subreq);
 517         if (!ok) {
 518                 tevent_req_error(req, ENOMEM);
 519                 return;
 520         }
 521
 522         state->ok = smbd_notifyd_init(state->msg, false, state->ppid);
 523         if (state->ok) {
 524                 DBG_WARNING("notifyd restarted\n");
 525                 tevent_req_done(req);
 526                 return;
 527         }
 528
 529         DBG_NOTICE("notifyd startup failed, rescheduling\n");
 530
 531         subreq = tevent_wakeup_send(state, state->ev,
 532                                     tevent_timeval_current_ofs(1, 0));
 533         if (tevent_req_nomem(subreq, req)) {
 534                 DBG_ERR("scheduling notifyd restart failed, giving up\n");
 535                 return;
 536         }
 537
 538         tevent_req_set_callback(subreq, notifyd_init_trigger, req);
 539         return;
 540 }
 541
 542 static bool notifyd_init_recv(struct tevent_req *req)
 543 {
 544         struct notifyd_init_state *state = tevent_req_data(
 545                 req, struct notifyd_init_state);
 546
 547         return state->ok;
 548 }
 549
 550 static void notifyd_started(struct tevent_req *req)
 551 {
 552         bool ok;
 553
 554         ok = notifyd_init_recv(req);
 555         TALLOC_FREE(req);
 556         if (!ok) {
 557                 DBG_ERR("Failed to restart notifyd, giving up\n");
 558                 return;
 559         }
 560 }
 561
 562 static void cleanupd_stopped(struct tevent_req *req);
 563
 564 static bool cleanupd_init(struct messaging_context *msg, bool interactive,
 565                           struct server_id *ppid)
 566 {
 567         struct tevent_context *ev = messaging_tevent_context(msg);
 568         struct server_id parent_id = messaging_server_id(msg);
 569         struct tevent_req *req;
 570         pid_t pid;
 571         NTSTATUS status;
 572         ssize_t rwret;
 573         int ret;
 574         bool ok;
 575         char c;
 576         int up_pipe[2];
 577
 578         if (interactive) {
 579                 req = smbd_cleanupd_send(msg, ev, msg, parent_id.pid);
 580                 *ppid = messaging_server_id(msg);
 581                 return (req != NULL);
 582         }
 583
 584         ret = pipe(up_pipe);
 585         if (ret == -1) {
 586                 DBG_WARNING("pipe failed: %s\n", strerror(errno));
 587                 return false;
 588         }
 589
 590         pid = fork();
 591         if (pid == -1) {
 592                 DBG_WARNING("fork failed: %s\n", strerror(errno));
 593                 close(up_pipe[0]);
 594                 close(up_pipe[1]);
 595                 return false;
 596         }
 597
 598         if (pid != 0) {
 599
 600                 close(up_pipe[1]);
 601                 rwret = sys_read(up_pipe[0], &c, 1);
 602                 close(up_pipe[0]);
 603
 604                 if (rwret == -1) {
 605                         DBG_WARNING("sys_read failed: %s\n", strerror(errno));
 606                         return false;
 607                 }
 608                 if (rwret == 0) {
 609                         DBG_WARNING("cleanupd could not start\n");
 610                         return false;
 611                 }
 612                 if (c != 0) {
 613                         DBG_WARNING("cleanupd returned %d\n", (int)c);
 614                         return false;
 615                 }
 616
 617                 DBG_DEBUG("Started cleanupd pid=%d\n", (int)pid);
 618
 619                 if (am_parent != NULL) {
 620                         add_child_pid(am_parent, pid);
 621                 }
 622
 623                 *ppid = pid_to_procid(pid);
 624                 return true;
 625         }
 626
 627         close(up_pipe[0]);
 628
 629         status = smbd_reinit_after_fork(msg, ev, true, "cleanupd");
 630         if (!NT_STATUS_IS_OK(status)) {
 631                 DBG_WARNING("reinit_after_fork failed: %s\n",
 632                             nt_errstr(status));
 633                 c = 1;
 634                 sys_write(up_pipe[1], &c, 1);
 635
 636                 exit(1);
 637         }
 638
 639         req = smbd_cleanupd_send(msg, ev, msg, parent_id.pid);
 640         if (req == NULL) {
 641                 DBG_WARNING("smbd_cleanupd_send failed\n");
 642                 c = 2;
 643                 sys_write(up_pipe[1], &c, 1);
 644
 645                 exit(1);
 646         }
 647
 648         tevent_req_set_callback(req, cleanupd_stopped, msg);
 649
 650         c = 0;
 651         rwret = sys_write(up_pipe[1], &c, 1);
 652         close(up_pipe[1]);
 653
 654         if (rwret == -1) {
 655                 DBG_WARNING("sys_write failed: %s\n", strerror(errno));
 656                 exit(1);
 657         }
 658         if (rwret != 1) {
 659                 DBG_WARNING("sys_write could not write result\n");
 660                 exit(1);
 661         }
 662
 663         ok = tevent_req_poll(req, ev);
 664         if (!ok) {
 665                 DBG_WARNING("tevent_req_poll returned %s\n", strerror(errno));
 666         }
 667         exit(0);
 668 }
 669
 670 static void cleanupd_stopped(struct tevent_req *req)
 671 {
 672         NTSTATUS status;
 673
 674         status = smbd_cleanupd_recv(req);
 675         DBG_WARNING("cleanupd stopped: %s\n", nt_errstr(status));
 676 }
 677
 678 static void cleanupd_init_trigger(struct tevent_req *req);
 679
 680 struct cleanup_init_state {
 681         bool ok;
 682         struct tevent_context *ev;
 683         struct messaging_context *msg;
 684         struct server_id *ppid;
 685 };
 686
 687 static struct tevent_req *cleanupd_init_send(struct tevent_context *ev,
 688                                              TALLOC_CTX *mem_ctx,
 689                                              struct messaging_context *msg,
 690                                              struct server_id *ppid)
 691 {
 692         struct tevent_req *req = NULL;
 693         struct tevent_req *subreq = NULL;
 694         struct cleanup_init_state *state = NULL;
 695
 696         req = tevent_req_create(mem_ctx, &state, struct cleanup_init_state);
 697         if (req == NULL) {
 698                 return NULL;
 699         }
 700
 701         *state = (struct cleanup_init_state) {
 702                 .msg = msg,
 703                 .ev = ev,
 704                 .ppid = ppid
 705         };
 706
 707         subreq = tevent_wakeup_send(state, ev, tevent_timeval_current_ofs(0, 0));
 708         if (tevent_req_nomem(subreq, req)) {
 709                 return tevent_req_post(req, ev);
 710         }
 711
 712         tevent_req_set_callback(subreq, cleanupd_init_trigger, req);
 713         return req;
 714 }
 715
 716 static void cleanupd_init_trigger(struct tevent_req *subreq)
 717 {
 718         struct tevent_req *req = tevent_req_callback_data(
 719                 subreq, struct tevent_req);
 720         struct cleanup_init_state *state = tevent_req_data(
 721                 req, struct cleanup_init_state);
 722         bool ok;
 723
 724         DBG_NOTICE("Triggering cleanupd startup\n");
 725
 726         ok = tevent_wakeup_recv(subreq);
 727         TALLOC_FREE(subreq);
 728         if (!ok) {
 729                 tevent_req_error(req, ENOMEM);
 730                 return;
 731         }
 732
 733         state->ok = cleanupd_init(state->msg, false, state->ppid);
 734         if (state->ok) {
 735                 DBG_WARNING("cleanupd restarted\n");
 736                 tevent_req_done(req);
 737                 return;
 738         }
 739
 740         DBG_NOTICE("cleanupd startup failed, rescheduling\n");
 741
 742         subreq = tevent_wakeup_send(state, state->ev,
 743                                     tevent_timeval_current_ofs(1, 0));
 744         if (tevent_req_nomem(subreq, req)) {
 745                 DBG_ERR("scheduling cleanupd restart failed, giving up\n");
 746                 return;
 747         }
 748
 749         tevent_req_set_callback(subreq, cleanupd_init_trigger, req);
 750         return;
 751 }
 752
 753 static bool cleanupd_init_recv(struct tevent_req *req)
 754 {
 755         struct cleanup_init_state *state = tevent_req_data(
 756                 req, struct cleanup_init_state);
 757
 758         return state->ok;
 759 }
 760
 761 static void cleanupd_started(struct tevent_req *req)
 762 {
 763         bool ok;
 764         NTSTATUS status;
 765         struct smbd_parent_context *parent = tevent_req_callback_data(
 766                 req, struct smbd_parent_context);
 767
 768         ok = cleanupd_init_recv(req);
 769         TALLOC_FREE(req);
 770         if (!ok) {
 771                 DBG_ERR("Failed to restart cleanupd, giving up\n");
 772                 return;
 773         }
 774
 775         status = messaging_send(parent->msg_ctx,
 776                                 parent->cleanupd,
 777                                 MSG_SMB_NOTIFY_CLEANUP,
 778                                 &data_blob_null);
 779         if (!NT_STATUS_IS_OK(status)) {
 780                 DBG_ERR("messaging_send returned %s\n",
 781                         nt_errstr(status));
 782         }
 783 }
 784
 785 static void remove_child_pid(struct smbd_parent_context *parent,
 786                              pid_t pid,
 787                              bool unclean_shutdown)
 788 {
 789         struct smbd_child_pid *child;
 790         NTSTATUS status;
 791         bool ok;
 792
 793         for (child = parent->children; child != NULL; child = child->next) {
 794                 if (child->pid == pid) {
 795                         struct smbd_child_pid *tmp = child;
 796                         DLIST_REMOVE(parent->children, child);
 797                         TALLOC_FREE(tmp);
 798                         parent->num_children -= 1;
 799                         break;
 800                 }
 801         }
 802
 803         if (child == NULL) {
 804                 /* not all forked child processes are added to the children list */
 805                 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid));
 806                 return;
 807         }
 808
 809         if (pid == procid_to_pid(&parent->cleanupd)) {
 810                 struct tevent_req *req;
 811
 812                 server_id_set_disconnected(&parent->cleanupd);
 813
 814                 DBG_WARNING("Restarting cleanupd\n");
 815                 req = cleanupd_init_send(messaging_tevent_context(parent->msg_ctx),
 816                                          parent,
 817                                          parent->msg_ctx,
 818                                          &parent->cleanupd);
 819                 if (req == NULL) {
 820                         DBG_ERR("Failed to restart cleanupd\n");
 821                         return;
 822                 }
 823                 tevent_req_set_callback(req, cleanupd_started, parent);
 824                 return;
 825         }
 826
 827         if (pid == procid_to_pid(&parent->notifyd)) {
 828                 struct tevent_req *req;
 829                 struct tevent_context *ev = messaging_tevent_context(
 830                         parent->msg_ctx);
 831
 832                 server_id_set_disconnected(&parent->notifyd);
 833
 834                 DBG_WARNING("Restarting notifyd\n");
 835                 req = notifyd_init_send(ev,
 836                                         parent,
 837                                         parent->msg_ctx,
 838                                         &parent->notifyd);
 839                 if (req == NULL) {
 840                         DBG_ERR("Failed to restart notifyd\n");
 841                         return;
 842                 }
 843                 tevent_req_set_callback(req, notifyd_started, parent);
 844                 return;
 845         }
 846
 847         ok = cleanupdb_store_child(pid, unclean_shutdown);
 848         if (!ok) {
 849                 DBG_ERR("cleanupdb_store_child failed\n");
 850                 return;
 851         }
 852
 853         if (!server_id_is_disconnected(&parent->cleanupd)) {
 854                 status = messaging_send(parent->msg_ctx,
 855                                         parent->cleanupd,
 856                                         MSG_SMB_NOTIFY_CLEANUP,
 857                                         &data_blob_null);
 858                 if (!NT_STATUS_IS_OK(status)) {
 859                         DBG_ERR("messaging_send returned %s\n",
 860                                 nt_errstr(status));
 861                 }
 862         }
 863 }
 864
 865 /****************************************************************************
 866  Have we reached the process limit ?
 867 ****************************************************************************/
 868
 869 static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
 870 {
 871         int max_processes = lp_max_smbd_processes();
 872
 873         if (!max_processes)
 874                 return True;
 875
 876         return parent->num_children < max_processes;
 877 }
 878
 879 static void smbd_sig_chld_handler(struct tevent_context *ev,
 880                                   struct tevent_signal *se,
 881                                   int signum,
 882                                   int count,
 883                                   void *siginfo,
 884                                   void *private_data)
 885 {
 886         pid_t pid;
 887         int status;
 888         struct smbd_parent_context *parent =
 889                 talloc_get_type_abort(private_data,
 890                 struct smbd_parent_context);
 891
 892         while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
 893                 bool unclean_shutdown = False;
 894
 895                 /* If the child terminated normally, assume
 896                    it was an unclean shutdown unless the
 897                    status is 0
 898                 */
 899                 if (WIFEXITED(status)) {
 900                         unclean_shutdown = WEXITSTATUS(status);
 901                 }
 902                 /* If the child terminated due to a signal
 903                    we always assume it was unclean.
 904                 */
 905                 if (WIFSIGNALED(status)) {
 906                         unclean_shutdown = True;
 907                 }
 908                 remove_child_pid(parent, pid, unclean_shutdown);
 909         }
 910 }
 911
 912 static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
 913 {
 914         struct tevent_signal *se;
 915
 916         se = tevent_add_signal(parent->ev_ctx,
 917                                parent, /* mem_ctx */
 918                                SIGCHLD, 0,
 919                                smbd_sig_chld_handler,
 920                                parent);
 921         if (!se) {
 922                 exit_server("failed to setup SIGCHLD handler");
 923         }
 924 }
 925
 926 static void smbd_open_socket_close_fn(struct tevent_context *ev,
 927                                       struct tevent_fd *fde,
 928                                       int fd,
 929                                       void *private_data)
 930 {
 931         /* this might be the socket_wrapper swrap_close() */
 932         close(fd);
 933 }
 934
 935 static void smbd_accept_connection(struct tevent_context *ev,
 936                                    struct tevent_fd *fde,
 937                                    uint16_t flags,
 938                                    void *private_data)
 939 {
 940         struct smbd_open_socket *s = talloc_get_type_abort(private_data,
 941                                      struct smbd_open_socket);
 942         struct messaging_context *msg_ctx = s->parent->msg_ctx;
 943         struct sockaddr_storage addr;
 944         socklen_t in_addrlen = sizeof(addr);
 945         int fd;
 946         pid_t pid = 0;
 947
 948         fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
 949         if (fd == -1 && errno == EINTR)
 950                 return;
 951
 952         if (fd == -1) {
 953                 DEBUG(0,("accept: %s\n",
 954                          strerror(errno)));
 955                 return;
 956         }
 957         smb_set_close_on_exec(fd);
 958
 959         if (s->parent->interactive) {
 960                 reinit_after_fork(msg_ctx, ev, true, NULL);
 961                 smbd_process(ev, msg_ctx, fd, true);
 962                 exit_server_cleanly("end of interactive mode");
 963                 return;
 964         }
 965
 966         if (!allowable_number_of_smbd_processes(s->parent)) {
 967                 close(fd);
 968                 return;
 969         }
 970
 971         pid = fork();
 972         if (pid == 0) {
 973                 NTSTATUS status = NT_STATUS_OK;
 974
 975                 /*
 976                  * Can't use TALLOC_FREE here. Nulling out the argument to it
 977                  * would overwrite memory we've just freed.
 978                  */
 979                 talloc_free(s->parent);
 980                 s = NULL;
 981
 982                 /* Stop zombies, the parent explicitly handles
 983                  * them, counting worker smbds. */
 984                 CatchChild();
 985
 986                 status = smbd_reinit_after_fork(msg_ctx, ev, true, NULL);
 987                 if (!NT_STATUS_IS_OK(status)) {
 988                         if (NT_STATUS_EQUAL(status,
 989                                             NT_STATUS_TOO_MANY_OPENED_FILES)) {
 990                                 DEBUG(0,("child process cannot initialize "
 991                                          "because too many files are open\n"));
 992                                 goto exit;
 993                         }
 994                         if (lp_clustering() &&
 995                             (NT_STATUS_EQUAL(
 996                                     status, NT_STATUS_INTERNAL_DB_ERROR) ||
 997                              NT_STATUS_EQUAL(
 998                                     status, NT_STATUS_CONNECTION_REFUSED))) {
 999                                 DEBUG(1, ("child process cannot initialize "
1000                                           "because connection to CTDB "
1001                                           "has failed: %s\n",
1002                                           nt_errstr(status)));
1003                                 goto exit;
1004                         }
1005
1006                         DEBUG(0,("reinit_after_fork() failed\n"));
1007                         smb_panic("reinit_after_fork() failed");
1008                 }
1009
1010                 smbd_process(ev, msg_ctx, fd, false);
1011          exit:
1012                 exit_server_cleanly("end of child");
1013                 return;
1014         }
1015
1016         if (pid < 0) {
1017                 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
1018                          strerror(errno)));
1019         }
1020
1021         /* The parent doesn't need this socket */
1022         close(fd);
1023
1024         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
1025                 Clear the closed fd info out of server_fd --
1026                 and more importantly, out of client_fd in
1027                 util_sock.c, to avoid a possible
1028                 getpeername failure if we reopen the logs
1029                 and use %I in the filename.
1030         */
1031
1032         if (pid != 0) {
1033                 add_child_pid(s->parent, pid);
1034         }
1035
1036         /* Force parent to check log size after
1037          * spawning child.  Fix from
1038          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
1039          * parent smbd will log to logserver.smb.  It
1040          * writes only two messages for each child
1041          * started/finished. But each child writes,
1042          * say, 50 messages also in logserver.smb,
1043          * begining with the debug_count of the
1044          * parent, before the child opens its own log
1045          * file logserver.client. In a worst case
1046          * scenario the size of logserver.smb would be
1047          * checked after about 50*50=2500 messages
1048          * (ca. 100kb).
1049          * */
1050         force_check_log_size();
1051 }
1052
1053 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
1054                                  struct tevent_context *ev_ctx,
1055                                  const struct sockaddr_storage *ifss,
1056                                  uint16_t port)
1057 {
1058         struct smbd_open_socket *s;
1059
1060         s = talloc(parent, struct smbd_open_socket);
1061         if (!s) {
1062                 return false;
1063         }
1064
1065         s->parent = parent;
1066         s->fd = open_socket_in(SOCK_STREAM,
1067                                port,
1068                                parent->sockets == NULL ? 0 : 2,
1069                                ifss,
1070                                true);
1071         if (s->fd == -1) {
1072                 DEBUG(0,("smbd_open_one_socket: open_socket_in: "
1073                         "%s\n", strerror(errno)));
1074                 TALLOC_FREE(s);
1075                 /*
1076                  * We ignore an error here, as we've done before
1077                  */
1078                 return true;
1079         }
1080
1081         /* ready to listen */
1082         set_socket_options(s->fd, "SO_KEEPALIVE");
1083         set_socket_options(s->fd, lp_socket_options());
1084
1085         /* Set server socket to
1086          * non-blocking for the accept. */
1087         set_blocking(s->fd, False);
1088
1089         if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
1090                 DEBUG(0,("smbd_open_one_socket: listen: "
1091                         "%s\n", strerror(errno)));
1092                         close(s->fd);
1093                 TALLOC_FREE(s);
1094                 return false;
1095         }
1096
1097         s->fde = tevent_add_fd(ev_ctx,
1098                                s,
1099                                s->fd, TEVENT_FD_READ,
1100                                smbd_accept_connection,
1101                                s);
1102         if (!s->fde) {
1103                 DEBUG(0,("smbd_open_one_socket: "
1104                          "tevent_add_fd: %s\n",
1105                          strerror(errno)));
1106                 close(s->fd);
1107                 TALLOC_FREE(s);
1108                 return false;
1109         }
1110         tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
1111
1112         DLIST_ADD_END(parent->sockets, s);
1113
1114         return true;
1115 }
1116
1117 /****************************************************************************
1118  Open the socket communication.
1119 ****************************************************************************/
1120
1121 static bool open_sockets_smbd(struct smbd_parent_context *parent,
1122                               struct tevent_context *ev_ctx,
1123                               struct messaging_context *msg_ctx,
1124                               const char *smb_ports)
1125 {
1126         int num_interfaces = iface_count();
1127         int i,j;
1128         const char **ports;
1129         unsigned dns_port = 0;
1130
1131 #ifdef HAVE_ATEXIT
1132         atexit(killkids);
1133 #endif
1134
1135         /* Stop zombies */
1136         smbd_setup_sig_chld_handler(parent);
1137
1138         ports = lp_smb_ports();
1139
1140         /* use a reasonable default set of ports - listing on 445 and 139 */
1141         if (smb_ports) {
1142                 char **l;
1143                 l = str_list_make_v3(talloc_tos(), smb_ports, NULL);
1144                 ports = discard_const_p(const char *, l);
1145         }
1146
1147         for (j = 0; ports && ports[j]; j++) {
1148                 unsigned port = atoi(ports[j]);
1149
1150                 if (port == 0 || port > 0xffff) {
1151                         exit_server_cleanly("Invalid port in the config or on "
1152                                             "the commandline specified!");
1153                 }
1154         }
1155
1156         if (lp_interfaces() && lp_bind_interfaces_only()) {
1157                 /* We have been given an interfaces line, and been
1158                    told to only bind to those interfaces. Create a
1159                    socket per interface and bind to only these.
1160                 */
1161
1162                 /* Now open a listen socket for each of the
1163                    interfaces. */
1164                 for(i = 0; i < num_interfaces; i++) {
1165                         const struct sockaddr_storage *ifss =
1166                                         iface_n_sockaddr_storage(i);
1167                         if (ifss == NULL) {
1168                                 DEBUG(0,("open_sockets_smbd: "
1169                                         "interface %d has NULL IP address !\n",
1170                                         i));
1171                                 continue;
1172                         }
1173
1174                         for (j = 0; ports && ports[j]; j++) {
1175                                 unsigned port = atoi(ports[j]);
1176
1177                                 /* Keep the first port for mDNS service
1178                                  * registration.
1179                                  */
1180                                 if (dns_port == 0) {
1181                                         dns_port = port;
1182                                 }
1183
1184                                 if (!smbd_open_one_socket(parent,
1185                                                           ev_ctx,
1186                                                           ifss,
1187                                                           port)) {
1188                                         return false;
1189                                 }
1190                         }
1191                 }
1192         } else {
1193                 /* Just bind to 0.0.0.0 - accept connections
1194                    from anywhere. */
1195
1196                 const char *sock_addr;
1197                 char *sock_tok;
1198                 const char *sock_ptr;
1199
1200 #ifdef HAVE_IPV6
1201                 sock_addr = "::,0.0.0.0";
1202 #else
1203                 sock_addr = "0.0.0.0";
1204 #endif
1205
1206                 for (sock_ptr=sock_addr;
1207                      next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
1208                         for (j = 0; ports && ports[j]; j++) {
1209                                 struct sockaddr_storage ss;
1210                                 unsigned port = atoi(ports[j]);
1211
1212                                 /* Keep the first port for mDNS service
1213                                  * registration.
1214                                  */
1215                                 if (dns_port == 0) {
1216                                         dns_port = port;
1217                                 }
1218
1219                                 /* open an incoming socket */
1220                                 if (!interpret_string_addr(&ss, sock_tok,
1221                                                 AI_NUMERICHOST|AI_PASSIVE)) {
1222                                         continue;
1223                                 }
1224
1225                                 /*
1226                                  * If we fail to open any sockets
1227                                  * in this loop the parent-sockets == NULL
1228                                  * case below will prevent us from starting.
1229                                  */
1230
1231                                 (void)smbd_open_one_socket(parent,
1232                                                   ev_ctx,
1233                                                   &ss,
1234                                                   port);
1235                         }
1236                 }
1237         }
1238
1239         if (parent->sockets == NULL) {
1240                 DEBUG(0,("open_sockets_smbd: No "
1241                         "sockets available to bind to.\n"));
1242                 return false;
1243         }
1244
1245         /* Listen to messages */
1246
1247         messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
1248         messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
1249                            smbd_parent_conf_updated);
1250         messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
1251                            smb_stat_cache_delete);
1252         messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
1253         messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
1254                            smb_parent_send_to_children);
1255         messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
1256                            smb_parent_send_to_children);
1257         messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
1258                            smb_tell_num_children);
1259
1260         messaging_register(msg_ctx, NULL,
1261                            ID_CACHE_DELETE, smbd_parent_id_cache_delete);
1262         messaging_register(msg_ctx, NULL,
1263                            ID_CACHE_KILL, smbd_parent_id_cache_kill);
1264         messaging_register(msg_ctx, NULL, MSG_SMB_NOTIFY_STARTED,
1265                            smb_parent_send_to_children);
1266
1267 #ifdef DEVELOPER
1268         messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
1269                            msg_inject_fault);
1270 #endif
1271
1272 #if defined(DEVELOPER) || defined(ENABLE_SELFTEST)
1273         messaging_register(msg_ctx, NULL, MSG_SMB_SLEEP, msg_sleep);
1274 #endif
1275
1276         if (lp_multicast_dns_register() && (dns_port != 0)) {
1277 #ifdef WITH_DNSSD_SUPPORT
1278                 smbd_setup_mdns_registration(ev_ctx,
1279                                              parent, dns_port);
1280 #endif
1281 #ifdef WITH_AVAHI_SUPPORT
1282                 void *avahi_conn;
1283
1284                 avahi_conn = avahi_start_register(ev_ctx,
1285                                                   ev_ctx,
1286                                                   dns_port);
1287                 if (avahi_conn == NULL) {
1288                         DEBUG(10, ("avahi_start_register failed\n"));
1289                 }
1290 #endif
1291         }
1292
1293         return true;
1294 }
1295
1296
1297 /*
1298   handle stdin becoming readable when we are in --foreground mode
1299  */
1300 static void smbd_stdin_handler(struct tevent_context *ev,
1301                                struct tevent_fd *fde,
1302                                uint16_t flags,
1303                                void *private_data)
1304 {
1305         char c;
1306         if (read(0, &c, 1) != 1) {
1307                 /* we have reached EOF on stdin, which means the
1308                    parent has exited. Shutdown the server */
1309                 exit_server_cleanly("EOF on stdin");
1310         }
1311 }
1312
1313 struct smbd_parent_tevent_trace_state {
1314         TALLOC_CTX *frame;
1315 };
1316
1317 static void smbd_parent_tevent_trace_callback(enum tevent_trace_point point,
1318                                               void *private_data)
1319 {
1320         struct smbd_parent_tevent_trace_state *state =
1321                 (struct smbd_parent_tevent_trace_state *)private_data;
1322
1323         switch (point) {
1324         case TEVENT_TRACE_BEFORE_WAIT:
1325                 break;
1326         case TEVENT_TRACE_AFTER_WAIT:
1327                 break;
1328         case TEVENT_TRACE_BEFORE_LOOP_ONCE:
1329                 TALLOC_FREE(state->frame);
1330                 state->frame = talloc_stackframe();
1331                 break;
1332         case TEVENT_TRACE_AFTER_LOOP_ONCE:
1333                 TALLOC_FREE(state->frame);
1334                 break;
1335         }
1336
1337         errno = 0;
1338 }
1339
1340 static void smbd_parent_loop(struct tevent_context *ev_ctx,
1341                              struct smbd_parent_context *parent)
1342 {
1343         struct smbd_parent_tevent_trace_state trace_state = {
1344                 .frame = NULL,
1345         };
1346         int ret = 0;
1347
1348         tevent_set_trace_callback(ev_ctx, smbd_parent_tevent_trace_callback,
1349                                   &trace_state);
1350
1351         /* now accept incoming connections - forking a new process
1352            for each incoming connection */
1353         DEBUG(2,("waiting for connections\n"));
1354
1355         ret = tevent_loop_wait(ev_ctx);
1356         if (ret != 0) {
1357                 DEBUG(0, ("tevent_loop_wait failed: %d, %s, exiting\n",
1358                           ret, strerror(errno)));
1359         }
1360
1361         TALLOC_FREE(trace_state.frame);
1362
1363 /* NOTREACHED   return True; */
1364 }
1365
1366
1367 /****************************************************************************
1368  Initialise connect, service and file structs.
1369 ****************************************************************************/
1370
1371 static bool init_structs(void )
1372 {
1373         /*
1374          * Set the machine NETBIOS name if not already
1375          * set from the config file.
1376          */
1377
1378         if (!init_names())
1379                 return False;
1380
1381         if (!secrets_init())
1382                 return False;
1383
1384         return True;
1385 }
1386
1387 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1388                                          struct tevent_signal *se,
1389                                          int signum,
1390                                          int count,
1391                                          void *siginfo,
1392                                          void *private_data)
1393 {
1394         exit_server_cleanly("termination signal");
1395 }
1396
1397 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1398                                         struct tevent_signal *se,
1399                                         int signum,
1400                                         int count,
1401                                         void *siginfo,
1402                                         void *private_data)
1403 {
1404         struct smbd_parent_context *parent =
1405                 talloc_get_type_abort(private_data,
1406                 struct smbd_parent_context);
1407
1408         change_to_root_user();
1409         DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1410         reload_services(NULL, NULL, false);
1411
1412         printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1413 }
1414
1415 struct smbd_claim_version_state {
1416         TALLOC_CTX *mem_ctx;
1417         char *version;
1418 };
1419
1420 static void smbd_claim_version_parser(struct server_id exclusive,
1421                                       size_t num_shared,
1422                                       struct server_id *shared,
1423                                       const uint8_t *data,
1424                                       size_t datalen,
1425                                       void *private_data)
1426 {
1427         struct smbd_claim_version_state *state = private_data;
1428
1429         if (datalen == 0) {
1430                 state->version = NULL;
1431                 return;
1432         }
1433         if (data[datalen-1] != '\0') {
1434                 DBG_WARNING("Invalid samba version\n");
1435                 dump_data(DBGLVL_WARNING, data, datalen);
1436                 state->version = NULL;
1437                 return;
1438         }
1439         state->version = talloc_strdup(state->mem_ctx, (const char *)data);
1440 }
1441
1442 static NTSTATUS smbd_claim_version(struct messaging_context *msg,
1443                                    const char *version)
1444 {
1445         const char *name = "samba_version_string";
1446         struct smbd_claim_version_state state;
1447         struct g_lock_ctx *ctx;
1448         NTSTATUS status;
1449
1450         ctx = g_lock_ctx_init(msg, msg);
1451         if (ctx == NULL) {
1452                 DBG_WARNING("g_lock_ctx_init failed\n");
1453                 return NT_STATUS_UNSUCCESSFUL;
1454         }
1455
1456         status = g_lock_lock(ctx, string_term_tdb_data(name), G_LOCK_READ,
1457                              (struct timeval) { .tv_sec = 60 });
1458         if (!NT_STATUS_IS_OK(status)) {
1459                 DBG_WARNING("g_lock_lock(G_LOCK_READ) failed: %s\n",
1460                             nt_errstr(status));
1461                 TALLOC_FREE(ctx);
1462                 return status;
1463         }
1464
1465         state = (struct smbd_claim_version_state) { .mem_ctx = ctx };
1466
1467         status = g_lock_dump(ctx, string_term_tdb_data(name),
1468                              smbd_claim_version_parser, &state);
1469         if (!NT_STATUS_IS_OK(status) &&
1470             !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
1471                 DBG_ERR("Could not read samba_version_string\n");
1472                 g_lock_unlock(ctx, string_term_tdb_data(name));
1473                 TALLOC_FREE(ctx);
1474                 return status;
1475         }
1476
1477         if ((state.version != NULL) && (strcmp(version, state.version) == 0)) {
1478                 /*
1479                  * Leave the read lock for us around. Someone else already
1480                  * set the version correctly
1481                  */
1482                 TALLOC_FREE(ctx);
1483                 return NT_STATUS_OK;
1484         }
1485
1486         status = g_lock_lock(ctx, string_term_tdb_data(name), G_LOCK_UPGRADE,
1487                              (struct timeval) { .tv_sec = 60 });
1488         if (!NT_STATUS_IS_OK(status)) {
1489                 DBG_WARNING("g_lock_lock(G_LOCK_WRITE) failed: %s\n",
1490                             nt_errstr(status));
1491                 DBG_ERR("smbd %s already running, refusing to start "
1492                         "version %s\n", state.version, version);
1493                 TALLOC_FREE(ctx);
1494                 return NT_STATUS_SXS_VERSION_CONFLICT;
1495         }
1496
1497         status = g_lock_write_data(ctx, string_term_tdb_data(name),
1498                                    (const uint8_t *)version,
1499                                    strlen(version)+1);
1500         if (!NT_STATUS_IS_OK(status)) {
1501                 DBG_WARNING("g_lock_write_data failed: %s\n",
1502                             nt_errstr(status));
1503                 TALLOC_FREE(ctx);
1504                 return status;
1505         }
1506
1507         status = g_lock_lock(ctx, string_term_tdb_data(name), G_LOCK_READ,
1508                              (struct timeval) { .tv_sec = 60 });
1509         if (!NT_STATUS_IS_OK(status)) {
1510                 DBG_WARNING("g_lock_lock(G_LOCK_READ) failed: %s\n",
1511                             nt_errstr(status));
1512                 TALLOC_FREE(ctx);
1513                 return status;
1514         }
1515
1516         /*
1517          * Leave "ctx" dangling so that g_lock.tdb keeps opened.
1518          */
1519         return NT_STATUS_OK;
1520 }
1521
1522 /****************************************************************************
1523  main program.
1524 ****************************************************************************/
1525
1526 /* Declare prototype for build_options() to avoid having to run it through
1527    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
1528    prototype generation system is too complicated. */
1529
1530 extern void build_options(bool screen);
1531
1532  int main(int argc,const char *argv[])
1533 {
1534         /* shall I run as a daemon */
1535         bool is_daemon = false;
1536         bool interactive = false;
1537         bool Fork = true;
1538         bool no_process_group = false;
1539         bool log_stdout = false;
1540         char *ports = NULL;
1541         char *profile_level = NULL;
1542         int opt;
1543         poptContext pc;
1544         bool print_build_options = False;
1545         struct server_id main_server_id = {0};
1546         enum {
1547                 OPT_DAEMON = 1000,
1548                 OPT_INTERACTIVE,
1549                 OPT_FORK,
1550                 OPT_NO_PROCESS_GROUP,
1551                 OPT_LOG_STDOUT
1552         };
1553         struct poptOption long_options[] = {
1554                 POPT_AUTOHELP
1555                 {
1556                         .longName   = "daemon",
1557                         .shortName  = 'D',
1558                         .argInfo    = POPT_ARG_NONE,
1559                         .arg        = NULL,
1560                         .val        = OPT_DAEMON,
1561                         .descrip    = "Become a daemon (default)" ,
1562                 },
1563                 {
1564                         .longName   = "interactive",
1565                         .shortName  = 'i',
1566                         .argInfo    = POPT_ARG_NONE,
1567                         .arg        = NULL,
1568                         .val        = OPT_INTERACTIVE,
1569                         .descrip    = "Run interactive (not a daemon) and log to stdout",
1570                 },
1571                 {
1572                         .longName   = "foreground",
1573                         .shortName  = 'F',
1574                         .argInfo    = POPT_ARG_NONE,
1575                         .arg        = NULL,
1576                         .val        = OPT_FORK,
1577                         .descrip    = "Run daemon in foreground (for daemontools, etc.)",
1578                 },
1579                 {
1580                         .longName   = "no-process-group",
1581                         .shortName  = '\0',
1582                         .argInfo    = POPT_ARG_NONE,
1583                         .arg        = NULL,
1584                         .val        = OPT_NO_PROCESS_GROUP,
1585                         .descrip    = "Don't create a new process group" ,
1586                 },
1587                 {
1588                         .longName   = "log-stdout",
1589                         .shortName  = 'S',
1590                         .argInfo    = POPT_ARG_NONE,
1591                         .arg        = NULL,
1592                         .val        = OPT_LOG_STDOUT,
1593                         .descrip    = "Log to stdout" ,
1594                 },
1595                 {
1596                         .longName   = "build-options",
1597                         .shortName  = 'b',
1598                         .argInfo    = POPT_ARG_NONE,
1599                         .arg        = NULL,
1600                         .val        = 'b',
1601                         .descrip    = "Print build options" ,
1602                 },
1603                 {
1604                         .longName   = "port",
1605                         .shortName  = 'p',
1606                         .argInfo    = POPT_ARG_STRING,
1607                         .arg        = &ports,
1608                         .val        = 0,
1609                         .descrip    = "Listen on the specified ports",
1610                 },
1611                 {
1612                         .longName   = "profiling-level",
1613                         .shortName  = 'P',
1614                         .argInfo    = POPT_ARG_STRING,
1615                         .arg        = &profile_level,
1616                         .val        = 0,
1617                         .descrip    = "Set profiling level","PROFILE_LEVEL",
1618                 },
1619                 POPT_COMMON_SAMBA
1620                 POPT_TABLEEND
1621         };
1622         struct smbd_parent_context *parent = NULL;
1623         TALLOC_CTX *frame;
1624         NTSTATUS status;
1625         struct tevent_context *ev_ctx;
1626         struct messaging_context *msg_ctx;
1627         struct server_id server_id;
1628         struct tevent_signal *se;
1629         int profiling_level;
1630         char *np_dir = NULL;
1631         static const struct smbd_shim smbd_shim_fns =
1632         {
1633                 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1634                 .change_to_root_user = smbd_change_to_root_user,
1635                 .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1636                 .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1637
1638                 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1639                 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1640
1641                 .become_root = smbd_become_root,
1642                 .unbecome_root = smbd_unbecome_root,
1643
1644                 .exit_server = smbd_exit_server,
1645                 .exit_server_cleanly = smbd_exit_server_cleanly,
1646         };
1647
1648         /*
1649          * Do this before any other talloc operation
1650          */
1651         talloc_enable_null_tracking();
1652         frame = talloc_stackframe();
1653
1654         setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1655
1656         smb_init_locale();
1657
1658         set_smbd_shim(&smbd_shim_fns);
1659
1660         smbd_init_globals();
1661
1662         TimeInit();
1663
1664 #ifdef HAVE_SET_AUTH_PARAMETERS
1665         set_auth_parameters(argc,argv);
1666 #endif
1667
1668         pc = poptGetContext("smbd", argc, argv, long_options, 0);
1669         while((opt = poptGetNextOpt(pc)) != -1) {
1670                 switch (opt)  {
1671                 case OPT_DAEMON:
1672                         is_daemon = true;
1673                         break;
1674                 case OPT_INTERACTIVE:
1675                         interactive = true;
1676                         break;
1677                 case OPT_FORK:
1678                         Fork = false;
1679                         break;
1680                 case OPT_NO_PROCESS_GROUP:
1681                         no_process_group = true;
1682                         break;
1683                 case OPT_LOG_STDOUT:
1684                         log_stdout = true;
1685                         break;
1686                 case 'b':
1687                         print_build_options = True;
1688                         break;
1689                 default:
1690                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1691                                   poptBadOption(pc, 0), poptStrerror(opt));
1692                         poptPrintUsage(pc, stderr, 0);
1693                         exit(1);
1694                 }
1695         }
1696         poptFreeContext(pc);
1697
1698         if (interactive) {
1699                 Fork = False;
1700                 log_stdout = True;
1701         }
1702
1703         if (log_stdout) {
1704                 setup_logging(argv[0], DEBUG_STDOUT);
1705         } else {
1706                 setup_logging(argv[0], DEBUG_FILE);
1707         }
1708
1709         if (print_build_options) {
1710                 build_options(True); /* Display output to screen as well as debug */
1711                 exit(0);
1712         }
1713
1714 #ifdef HAVE_SETLUID
1715         /* needed for SecureWare on SCO */
1716         setluid(0);
1717 #endif
1718
1719         set_remote_machine_name("smbd", False);
1720
1721         if (interactive && (DEBUGLEVEL >= 9)) {
1722                 talloc_enable_leak_report();
1723         }
1724
1725         if (log_stdout && Fork) {
1726                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1727                 exit(1);
1728         }
1729
1730         /*
1731          * We want to die early if we can't open /dev/urandom
1732          */
1733         generate_random_buffer(NULL, 0);
1734
1735         /* get initial effective uid and gid */
1736         sec_init();
1737
1738         /* make absolutely sure we run as root - to handle cases where people
1739            are crazy enough to have it setuid */
1740         gain_root_privilege();
1741         gain_root_group_privilege();
1742
1743         fault_setup();
1744         dump_core_setup("smbd", lp_logfile(talloc_tos()));
1745
1746         /* we are never interested in SIGPIPE */
1747         BlockSignals(True,SIGPIPE);
1748
1749 #if defined(SIGFPE)
1750         /* we are never interested in SIGFPE */
1751         BlockSignals(True,SIGFPE);
1752 #endif
1753
1754 #if defined(SIGUSR2)
1755         /* We are no longer interested in USR2 */
1756         BlockSignals(True,SIGUSR2);
1757 #endif
1758
1759         /* POSIX demands that signals are inherited. If the invoking process has
1760          * these signals masked, we will have problems, as we won't recieve them. */
1761         BlockSignals(False, SIGHUP);
1762         BlockSignals(False, SIGUSR1);
1763         BlockSignals(False, SIGTERM);
1764
1765         /* Ensure we leave no zombies until we
1766          * correctly set up child handling below. */
1767
1768         CatchChild();
1769
1770         /* we want total control over the permissions on created files,
1771            so set our umask to 0 */
1772         umask(0);
1773
1774         reopen_logs();
1775
1776         DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1777         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1778
1779         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1780                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1781
1782         /* Output the build options to the debug log */
1783         build_options(False);
1784
1785         if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4) {
1786                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1787                 exit(1);
1788         }
1789
1790         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1791                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1792                 exit(1);
1793         }
1794
1795         /*
1796          * This calls unshare(CLONE_FS); on linux
1797          * in order to check if the running kernel/container
1798          * environment supports it.
1799          */
1800         per_thread_cwd_check();
1801
1802         if (!cluster_probe_ok()) {
1803                 exit(1);
1804         }
1805
1806         /* Init the security context and global current_user */
1807         init_sec_ctx();
1808
1809         /*
1810          * Initialize the event context. The event context needs to be
1811          * initialized before the messaging context, cause the messaging
1812          * context holds an event context.
1813          */
1814         ev_ctx = global_event_context();
1815         if (ev_ctx == NULL) {
1816                 exit(1);
1817         }
1818
1819         /*
1820          * Init the messaging context
1821          * FIXME: This should only call messaging_init()
1822          */
1823         msg_ctx = global_messaging_context();
1824         if (msg_ctx == NULL) {
1825                 exit(1);
1826         }
1827
1828         /*
1829          * Reloading of the printers will not work here as we don't have a
1830          * server info and rpc services set up. It will be called later.
1831          */
1832         if (!reload_services(NULL, NULL, false)) {
1833                 exit(1);
1834         }
1835
1836         if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1837             && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1838                 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1839                 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1840                 exit(1);
1841         }
1842
1843         /* ...NOTE... Log files are working from this point! */
1844
1845         DEBUG(3,("loaded services\n"));
1846
1847         init_structs();
1848
1849         if (!profile_setup(msg_ctx, False)) {
1850                 DEBUG(0,("ERROR: failed to setup profiling\n"));
1851                 return -1;
1852         }
1853
1854         if (profile_level != NULL) {
1855                 profiling_level = atoi(profile_level);
1856         } else {
1857                 profiling_level = lp_smbd_profiling_level();
1858         }
1859         main_server_id = messaging_server_id(msg_ctx);
1860         set_profile_level(profiling_level, &main_server_id);
1861
1862         if (!is_daemon && !is_a_socket(0)) {
1863                 if (!interactive) {
1864                         DEBUG(3, ("Standard input is not a socket, "
1865                                   "assuming -D option\n"));
1866                 }
1867
1868                 /*
1869                  * Setting is_daemon here prevents us from eventually calling
1870                  * the open_sockets_inetd()
1871                  */
1872
1873                 is_daemon = True;
1874         }
1875
1876         if (is_daemon && !interactive) {
1877                 DEBUG(3, ("Becoming a daemon.\n"));
1878                 become_daemon(Fork, no_process_group, log_stdout);
1879         }
1880
1881 #ifdef HAVE_SETPGID
1882         /*
1883          * If we're interactive we want to set our own process group for
1884          * signal management.
1885          */
1886         if (interactive && !no_process_group)
1887                 setpgid( (pid_t)0, (pid_t)0);
1888 #endif
1889
1890         if (!directory_exist(lp_lock_directory()))
1891                 mkdir(lp_lock_directory(), 0755);
1892
1893         if (!directory_exist(lp_pid_directory()))
1894                 mkdir(lp_pid_directory(), 0755);
1895
1896         if (is_daemon)
1897                 pidfile_create(lp_pid_directory(), "smbd");
1898
1899         status = reinit_after_fork(msg_ctx, ev_ctx, false, NULL);
1900         if (!NT_STATUS_IS_OK(status)) {
1901                 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
1902         }
1903
1904         if (!interactive) {
1905                 /*
1906                  * Do not initialize the parent-child-pipe before becoming a
1907                  * daemon: this is used to detect a died parent in the child
1908                  * process.
1909                  */
1910                 status = init_before_fork();
1911                 if (!NT_STATUS_IS_OK(status)) {
1912                         exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1913                 }
1914         }
1915
1916         parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1917         if (!parent) {
1918                 exit_server("talloc(struct smbd_parent_context) failed");
1919         }
1920         parent->interactive = interactive;
1921         parent->ev_ctx = ev_ctx;
1922         parent->msg_ctx = msg_ctx;
1923         am_parent = parent;
1924
1925         se = tevent_add_signal(parent->ev_ctx,
1926                                parent,
1927                                SIGTERM, 0,
1928                                smbd_parent_sig_term_handler,
1929                                parent);
1930         if (!se) {
1931                 exit_server("failed to setup SIGTERM handler");
1932         }
1933         se = tevent_add_signal(parent->ev_ctx,
1934                                parent,
1935                                SIGHUP, 0,
1936                                smbd_parent_sig_hup_handler,
1937                                parent);
1938         if (!se) {
1939                 exit_server("failed to setup SIGHUP handler");
1940         }
1941
1942         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1943
1944         if (smbd_memcache() == NULL) {
1945                 exit_daemon("no memcache available", EACCES);
1946         }
1947
1948         memcache_set_global(smbd_memcache());
1949
1950         /* Initialise the password backed before the global_sam_sid
1951            to ensure that we fetch from ldap before we make a domain sid up */
1952
1953         if(!initialize_password_db(false, ev_ctx))
1954                 exit(1);
1955
1956         if (!secrets_init()) {
1957                 exit_daemon("smbd can not open secrets.tdb", EACCES);
1958         }
1959
1960         if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1961                 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1962                 if (!open_schannel_session_store(NULL, lp_ctx)) {
1963                         exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
1964                 }
1965                 TALLOC_FREE(lp_ctx);
1966         }
1967
1968         if(!get_global_sam_sid()) {
1969                 exit_daemon("Samba cannot create a SAM SID", EACCES);
1970         }
1971
1972         server_id = messaging_server_id(msg_ctx);
1973         status = smbXsrv_version_global_init(&server_id);
1974         if (!NT_STATUS_IS_OK(status)) {
1975                 exit_daemon("Samba cannot init server context", EACCES);
1976         }
1977
1978         status = smbXsrv_client_global_init();
1979         if (!NT_STATUS_IS_OK(status)) {
1980                 exit_daemon("Samba cannot init clients context", EACCES);
1981         }
1982
1983         status = smbXsrv_session_global_init(msg_ctx);
1984         if (!NT_STATUS_IS_OK(status)) {
1985                 exit_daemon("Samba cannot init session context", EACCES);
1986         }
1987
1988         status = smbXsrv_tcon_global_init();
1989         if (!NT_STATUS_IS_OK(status)) {
1990                 exit_daemon("Samba cannot init tcon context", EACCES);
1991         }
1992
1993         if (!locking_init())
1994                 exit_daemon("Samba cannot init locking", EACCES);
1995
1996         if (!leases_db_init(false)) {
1997                 exit_daemon("Samba cannot init leases", EACCES);
1998         }
1999
2000         if (!smbd_notifyd_init(msg_ctx, interactive, &parent->notifyd)) {
2001                 exit_daemon("Samba cannot init notification", EACCES);
2002         }
2003
2004         if (!cleanupd_init(msg_ctx, interactive, &parent->cleanupd)) {
2005                 exit_daemon("Samba cannot init the cleanupd", EACCES);
2006         }
2007
2008         if (!messaging_parent_dgm_cleanup_init(msg_ctx)) {
2009                 exit(1);
2010         }
2011
2012         if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
2013                 exit_daemon("Samba cannot init scavenging", EACCES);
2014         }
2015
2016         if (!W_ERROR_IS_OK(registry_init_full()))
2017                 exit_daemon("Samba cannot init registry", EACCES);
2018
2019         /* Open the share_info.tdb here, so we don't have to open
2020            after the fork on every single connection.  This is a small
2021            performance improvment and reduces the total number of system
2022            fds used. */
2023         if (!share_info_db_init()) {
2024                 exit_daemon("ERROR: failed to load share info db.", EACCES);
2025         }
2026
2027         status = init_system_session_info(NULL);
2028         if (!NT_STATUS_IS_OK(status)) {
2029                 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
2030                           nt_errstr(status)));
2031                 return -1;
2032         }
2033
2034         if (!init_guest_session_info(NULL)) {
2035                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
2036                 return -1;
2037         }
2038
2039         if (!file_init_global()) {
2040                 DEBUG(0, ("ERROR: file_init_global() failed\n"));
2041                 return -1;
2042         }
2043         status = smbXsrv_open_global_init();
2044         if (!NT_STATUS_IS_OK(status)) {
2045                 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status));
2046         }
2047
2048         if (lp_clustering() && !lp_allow_unsafe_cluster_upgrade()) {
2049                 status = smbd_claim_version(msg_ctx, samba_version_string());
2050                 if (!NT_STATUS_IS_OK(status)) {
2051                         DBG_ERR("Could not claim version: %s\n",
2052                                     nt_errstr(status));
2053                         return -1;
2054                 }
2055         }
2056
2057         /* This MUST be done before start_epmd() because otherwise
2058          * start_epmd() forks and races against dcesrv_ep_setup() to
2059          * call directory_create_or_exist() */
2060         if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
2061                 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
2062                           lp_ncalrpc_dir(), strerror(errno)));
2063                 return -1;
2064         }
2065
2066         np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
2067         if (!np_dir) {
2068                 DEBUG(0, ("%s: Out of memory\n", __location__));
2069                 return -1;
2070         }
2071
2072         if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
2073                 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
2074                           np_dir, strerror(errno)));
2075                 return -1;
2076         }
2077
2078         if (is_daemon && !interactive) {
2079                 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK) {
2080                         start_epmd(ev_ctx, msg_ctx);
2081                 }
2082         }
2083
2084         status = dcesrv_ep_setup(ev_ctx, msg_ctx);
2085         if (!NT_STATUS_IS_OK(status)) {
2086                 DBG_ERR("Failed to setup RPC server: %s\n", nt_errstr(status));
2087                 exit_daemon("Samba cannot setup ep pipe", EACCES);
2088         }
2089
2090         if (is_daemon && !interactive) {
2091                 daemon_ready("smbd");
2092         }
2093
2094         /* only start other daemons if we are running as a daemon
2095          * -- bad things will happen if smbd is launched via inetd
2096          *  and we fork a copy of ourselves here */
2097         if (is_daemon && !interactive) {
2098
2099                 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
2100                         start_lsasd(ev_ctx, msg_ctx);
2101                 }
2102
2103                 if (rpc_fss_daemon() == RPC_DAEMON_FORK) {
2104                         start_fssd(ev_ctx, msg_ctx);
2105                 }
2106
2107                 if (!lp__disable_spoolss() &&
2108                     (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
2109                         bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
2110
2111                         if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
2112                                 exit_daemon("Samba failed to init printing subsystem", EACCES);
2113                         }
2114                 }
2115
2116 #ifdef WITH_SPOTLIGHT
2117                 if ((rpc_mdssvc_mode() == RPC_SERVICE_MODE_EXTERNAL) &&
2118                     (rpc_mdssd_daemon() == RPC_DAEMON_FORK)) {
2119                         start_mdssd(ev_ctx, msg_ctx);
2120                 }
2121 #endif
2122         } else if (!lp__disable_spoolss() &&
2123                    (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
2124                 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
2125                         exit(1);
2126                 }
2127         }
2128
2129         if (!is_daemon) {
2130                 int sock;
2131
2132                 /* inetd mode */
2133                 TALLOC_FREE(frame);
2134
2135                 /* Started from inetd. fd 0 is the socket. */
2136                 /* We will abort gracefully when the client or remote system
2137                    goes away */
2138                 sock = dup(0);
2139
2140                 /* close stdin, stdout (if not logging to it), but not stderr */
2141                 close_low_fds(true, !debug_get_output_is_stdout(), false);
2142
2143 #ifdef HAVE_ATEXIT
2144                 atexit(killkids);
2145 #endif
2146
2147                 /* Stop zombies */
2148                 smbd_setup_sig_chld_handler(parent);
2149
2150                 smbd_process(ev_ctx, msg_ctx, sock, true);
2151
2152                 exit_server_cleanly(NULL);
2153                 return(0);
2154         }
2155
2156         if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
2157                 exit_server("open_sockets_smbd() failed");
2158
2159         /* do a printer update now that all messaging has been set up,
2160          * before we allow clients to start connecting */
2161         if (!lp__disable_spoolss() &&
2162             (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
2163                 printing_subsystem_update(ev_ctx, msg_ctx, false);
2164         }
2165
2166         TALLOC_FREE(frame);
2167         /* make sure we always have a valid stackframe */
2168         frame = talloc_stackframe();
2169
2170         if (!Fork) {
2171                 /* if we are running in the foreground then look for
2172                    EOF on stdin, and exit if it happens. This allows
2173                    us to die if the parent process dies
2174                    Only do this on a pipe or socket, no other device.
2175                 */
2176                 struct stat st;
2177                 if (fstat(0, &st) != 0) {
2178                         return false;
2179                 }
2180                 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
2181                         tevent_add_fd(ev_ctx,
2182                                         parent,
2183                                         0,
2184                                         TEVENT_FD_READ,
2185                                         smbd_stdin_handler,
2186                                         NULL);
2187                 }
2188         }
2189
2190         smbd_parent_loop(ev_ctx, parent);
2191
2192         exit_server_cleanly(NULL);
2193         TALLOC_FREE(frame);
2194         return(0);
2195 }