source3/printing/printing.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    printing backend routines
   5    Copyright (C) Andrew Tridgell 1992-2000
   6    Copyright (C) Jeremy Allison 2002
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "printing.h"
  24 #include "librpc/gen_ndr/messaging.h"
  25
  26 extern struct current_user current_user;
  27 extern userdom_struct current_user_info;
  28
  29 /* Current printer interface */
  30 static bool remove_from_jobs_changed(const char* sharename, uint32 jobid);
  31
  32 /*
  33    the printing backend revolves around a tdb database that stores the
  34    SMB view of the print queue
  35
  36    The key for this database is a jobid - a internally generated number that
  37    uniquely identifies a print job
  38
  39    reading the print queue involves two steps:
  40      - possibly running lpq and updating the internal database from that
  41      - reading entries from the database
  42
  43    jobids are assigned when a job starts spooling.
  44 */
  45
  46 static TDB_CONTEXT *rap_tdb;
  47 static uint16 next_rap_jobid;
  48 struct rap_jobid_key {
  49         fstring sharename;
  50         uint32  jobid;
  51 };
  52
  53 /***************************************************************************
  54  Nightmare. LANMAN jobid's are 16 bit numbers..... We must map them to 32
  55  bit RPC jobids.... JRA.
  56 ***************************************************************************/
  57
  58 uint16 pjobid_to_rap(const char* sharename, uint32 jobid)
  59 {
  60         uint16 rap_jobid;
  61         TDB_DATA data, key;
  62         struct rap_jobid_key jinfo;
  63         uint8 buf[2];
  64
  65         DEBUG(10,("pjobid_to_rap: called.\n"));
  66
  67         if (!rap_tdb) {
  68                 /* Create the in-memory tdb. */
  69                 rap_tdb = tdb_open_log(NULL, 0, TDB_INTERNAL, (O_RDWR|O_CREAT), 0644);
  70                 if (!rap_tdb)
  71                         return 0;
  72         }
  73
  74         ZERO_STRUCT( jinfo );
  75         fstrcpy( jinfo.sharename, sharename );
  76         jinfo.jobid = jobid;
  77         key.dptr = (uint8 *)&jinfo;
  78         key.dsize = sizeof(jinfo);
  79
  80         data = tdb_fetch(rap_tdb, key);
  81         if (data.dptr && data.dsize == sizeof(uint16)) {
  82                 rap_jobid = SVAL(data.dptr, 0);
  83                 SAFE_FREE(data.dptr);
  84                 DEBUG(10,("pjobid_to_rap: jobid %u maps to RAP jobid %u\n",
  85                         (unsigned int)jobid, (unsigned int)rap_jobid));
  86                 return rap_jobid;
  87         }
  88         SAFE_FREE(data.dptr);
  89         /* Not found - create and store mapping. */
  90         rap_jobid = ++next_rap_jobid;
  91         if (rap_jobid == 0)
  92                 rap_jobid = ++next_rap_jobid;
  93         SSVAL(buf,0,rap_jobid);
  94         data.dptr = buf;
  95         data.dsize = sizeof(rap_jobid);
  96         tdb_store(rap_tdb, key, data, TDB_REPLACE);
  97         tdb_store(rap_tdb, data, key, TDB_REPLACE);
  98
  99         DEBUG(10,("pjobid_to_rap: created jobid %u maps to RAP jobid %u\n",
 100                 (unsigned int)jobid, (unsigned int)rap_jobid));
 101         return rap_jobid;
 102 }
 103
 104 bool rap_to_pjobid(uint16 rap_jobid, fstring sharename, uint32 *pjobid)
 105 {
 106         TDB_DATA data, key;
 107         uint8 buf[2];
 108
 109         DEBUG(10,("rap_to_pjobid called.\n"));
 110
 111         if (!rap_tdb)
 112                 return False;
 113
 114         SSVAL(buf,0,rap_jobid);
 115         key.dptr = buf;
 116         key.dsize = sizeof(rap_jobid);
 117         data = tdb_fetch(rap_tdb, key);
 118         if ( data.dptr && data.dsize == sizeof(struct rap_jobid_key) )
 119         {
 120                 struct rap_jobid_key *jinfo = (struct rap_jobid_key*)data.dptr;
 121                 if (sharename != NULL) {
 122                         fstrcpy( sharename, jinfo->sharename );
 123                 }
 124                 *pjobid = jinfo->jobid;
 125                 DEBUG(10,("rap_to_pjobid: jobid %u maps to RAP jobid %u\n",
 126                         (unsigned int)*pjobid, (unsigned int)rap_jobid));
 127                 SAFE_FREE(data.dptr);
 128                 return True;
 129         }
 130
 131         DEBUG(10,("rap_to_pjobid: Failed to lookup RAP jobid %u\n",
 132                 (unsigned int)rap_jobid));
 133         SAFE_FREE(data.dptr);
 134         return False;
 135 }
 136
 137 void rap_jobid_delete(const char* sharename, uint32 jobid)
 138 {
 139         TDB_DATA key, data;
 140         uint16 rap_jobid;
 141         struct rap_jobid_key jinfo;
 142         uint8 buf[2];
 143
 144         DEBUG(10,("rap_jobid_delete: called.\n"));
 145
 146         if (!rap_tdb)
 147                 return;
 148
 149         ZERO_STRUCT( jinfo );
 150         fstrcpy( jinfo.sharename, sharename );
 151         jinfo.jobid = jobid;
 152         key.dptr = (uint8 *)&jinfo;
 153         key.dsize = sizeof(jinfo);
 154
 155         data = tdb_fetch(rap_tdb, key);
 156         if (!data.dptr || (data.dsize != sizeof(uint16))) {
 157                 DEBUG(10,("rap_jobid_delete: cannot find jobid %u\n",
 158                         (unsigned int)jobid ));
 159                 SAFE_FREE(data.dptr);
 160                 return;
 161         }
 162
 163         DEBUG(10,("rap_jobid_delete: deleting jobid %u\n",
 164                 (unsigned int)jobid ));
 165
 166         rap_jobid = SVAL(data.dptr, 0);
 167         SAFE_FREE(data.dptr);
 168         SSVAL(buf,0,rap_jobid);
 169         data.dptr = buf;
 170         data.dsize = sizeof(rap_jobid);
 171         tdb_delete(rap_tdb, key);
 172         tdb_delete(rap_tdb, data);
 173 }
 174
 175 static int get_queue_status(const char* sharename, print_status_struct *);
 176
 177 /****************************************************************************
 178  Initialise the printing backend. Called once at startup before the fork().
 179 ****************************************************************************/
 180
 181 bool print_backend_init(struct messaging_context *msg_ctx)
 182 {
 183         const char *sversion = "INFO/version";
 184         int services = lp_numservices();
 185         int snum;
 186
 187         unlink(cache_path("printing.tdb"));
 188         mkdir(cache_path("printing"),0755);
 189
 190         /* handle a Samba upgrade */
 191
 192         for (snum = 0; snum < services; snum++) {
 193                 struct tdb_print_db *pdb;
 194                 if (!lp_print_ok(snum))
 195                         continue;
 196
 197                 pdb = get_print_db_byname(lp_const_servicename(snum));
 198                 if (!pdb)
 199                         continue;
 200                 if (tdb_lock_bystring(pdb->tdb, sversion) == -1) {
 201                         DEBUG(0,("print_backend_init: Failed to open printer %s database\n", lp_const_servicename(snum) ));
 202                         release_print_db(pdb);
 203                         return False;
 204                 }
 205                 if (tdb_fetch_int32(pdb->tdb, sversion) != PRINT_DATABASE_VERSION) {
 206                         tdb_wipe_all(pdb->tdb);
 207                         tdb_store_int32(pdb->tdb, sversion, PRINT_DATABASE_VERSION);
 208                 }
 209                 tdb_unlock_bystring(pdb->tdb, sversion);
 210                 release_print_db(pdb);
 211         }
 212
 213         close_all_print_db(); /* Don't leave any open. */
 214
 215         /* do NT print initialization... */
 216         return nt_printing_init(msg_ctx);
 217 }
 218
 219 /****************************************************************************
 220  Shut down printing backend. Called once at shutdown to close the tdb.
 221 ****************************************************************************/
 222
 223 void printing_end(void)
 224 {
 225         close_all_print_db(); /* Don't leave any open. */
 226 }
 227
 228 /****************************************************************************
 229  Retrieve the set of printing functions for a given service.  This allows
 230  us to set the printer function table based on the value of the 'printing'
 231  service parameter.
 232
 233  Use the generic interface as the default and only use cups interface only
 234  when asked for (and only when supported)
 235 ****************************************************************************/
 236
 237 static struct printif *get_printer_fns_from_type( enum printing_types type )
 238 {
 239         struct printif *printer_fns = &generic_printif;
 240
 241 #ifdef HAVE_CUPS
 242         if ( type == PRINT_CUPS ) {
 243                 printer_fns = &cups_printif;
 244         }
 245 #endif /* HAVE_CUPS */
 246
 247 #ifdef HAVE_IPRINT
 248         if ( type == PRINT_IPRINT ) {
 249                 printer_fns = &iprint_printif;
 250         }
 251 #endif /* HAVE_IPRINT */
 252
 253         printer_fns->type = type;
 254
 255         return printer_fns;
 256 }
 257
 258 static struct printif *get_printer_fns( int snum )
 259 {
 260         return get_printer_fns_from_type( (enum printing_types)lp_printing(snum) );
 261 }
 262
 263
 264 /****************************************************************************
 265  Useful function to generate a tdb key.
 266 ****************************************************************************/
 267
 268 static TDB_DATA print_key(uint32 jobid, uint32 *tmp)
 269 {
 270         TDB_DATA ret;
 271
 272         SIVAL(tmp, 0, jobid);
 273         ret.dptr = (uint8 *)tmp;
 274         ret.dsize = sizeof(*tmp);
 275         return ret;
 276 }
 277
 278 /***********************************************************************
 279  unpack a pjob from a tdb buffer
 280 ***********************************************************************/
 281
 282 int unpack_pjob( uint8 *buf, int buflen, struct printjob *pjob )
 283 {
 284         int     len = 0;
 285         int     used;
 286         uint32 pjpid, pjsysjob, pjfd, pjstarttime, pjstatus;
 287         uint32 pjsize, pjpage_count, pjspooled, pjsmbjob;
 288
 289         if ( !buf || !pjob )
 290                 return -1;
 291
 292         len += tdb_unpack(buf+len, buflen-len, "dddddddddffff",
 293                                 &pjpid,
 294                                 &pjsysjob,
 295                                 &pjfd,
 296                                 &pjstarttime,
 297                                 &pjstatus,
 298                                 &pjsize,
 299                                 &pjpage_count,
 300                                 &pjspooled,
 301                                 &pjsmbjob,
 302                                 pjob->filename,
 303                                 pjob->jobname,
 304                                 pjob->user,
 305                                 pjob->queuename);
 306
 307         if ( len == -1 )
 308                 return -1;
 309
 310         used = unpack_devicemode(NULL, buf+len, buflen-len, &pjob->devmode);
 311         if (used == -1) {
 312                 return -1;
 313         }
 314
 315         len += used;
 316
 317         pjob->pid = pjpid;
 318         pjob->sysjob = pjsysjob;
 319         pjob->fd = pjfd;
 320         pjob->starttime = pjstarttime;
 321         pjob->status = pjstatus;
 322         pjob->size = pjsize;
 323         pjob->page_count = pjpage_count;
 324         pjob->spooled = pjspooled;
 325         pjob->smbjob = pjsmbjob;
 326
 327         return len;
 328
 329 }
 330
 331 /****************************************************************************
 332  Useful function to find a print job in the database.
 333 ****************************************************************************/
 334
 335 static struct printjob *print_job_find(const char *sharename, uint32 jobid)
 336 {
 337         static struct printjob  pjob;
 338         uint32_t tmp;
 339         TDB_DATA                ret;
 340         struct tdb_print_db     *pdb = get_print_db_byname(sharename);
 341
 342         DEBUG(10,("print_job_find: looking up job %u for share %s\n",
 343                         (unsigned int)jobid, sharename ));
 344
 345         if (!pdb) {
 346                 return NULL;
 347         }
 348
 349         ret = tdb_fetch(pdb->tdb, print_key(jobid, &tmp));
 350         release_print_db(pdb);
 351
 352         if (!ret.dptr) {
 353                 DEBUG(10,("print_job_find: failed to find jobid %u.\n", (unsigned int)jobid ));
 354                 return NULL;
 355         }
 356
 357         talloc_free(pjob.devmode);
 358
 359         ZERO_STRUCT( pjob );
 360
 361         if ( unpack_pjob( ret.dptr, ret.dsize, &pjob ) == -1 ) {
 362                 DEBUG(10,("print_job_find: failed to unpack jobid %u.\n", (unsigned int)jobid ));
 363                 SAFE_FREE(ret.dptr);
 364                 return NULL;
 365         }
 366
 367         SAFE_FREE(ret.dptr);
 368
 369         DEBUG(10,("print_job_find: returning system job %d for jobid %u.\n",
 370                         (int)pjob.sysjob, (unsigned int)jobid ));
 371
 372         return &pjob;
 373 }
 374
 375 /* Convert a unix jobid to a smb jobid */
 376
 377 struct unixjob_traverse_state {
 378         int sysjob;
 379         uint32 sysjob_to_jobid_value;
 380 };
 381
 382 static int unixjob_traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA key,
 383                                TDB_DATA data, void *private_data)
 384 {
 385         struct printjob *pjob;
 386         struct unixjob_traverse_state *state =
 387                 (struct unixjob_traverse_state *)private_data;
 388
 389         if (!data.dptr || data.dsize == 0)
 390                 return 0;
 391
 392         pjob = (struct printjob *)data.dptr;
 393         if (key.dsize != sizeof(uint32))
 394                 return 0;
 395
 396         if (state->sysjob == pjob->sysjob) {
 397                 uint32 jobid = IVAL(key.dptr,0);
 398
 399                 state->sysjob_to_jobid_value = jobid;
 400                 return 1;
 401         }
 402
 403         return 0;
 404 }
 405
 406 /****************************************************************************
 407  This is a *horribly expensive call as we have to iterate through all the
 408  current printer tdb's. Don't do this often ! JRA.
 409 ****************************************************************************/
 410
 411 uint32 sysjob_to_jobid(int unix_jobid)
 412 {
 413         int services = lp_numservices();
 414         int snum;
 415         struct unixjob_traverse_state state;
 416
 417         state.sysjob = unix_jobid;
 418         state.sysjob_to_jobid_value = (uint32)-1;
 419
 420         for (snum = 0; snum < services; snum++) {
 421                 struct tdb_print_db *pdb;
 422                 if (!lp_print_ok(snum))
 423                         continue;
 424                 pdb = get_print_db_byname(lp_const_servicename(snum));
 425                 if (!pdb) {
 426                         continue;
 427                 }
 428                 tdb_traverse(pdb->tdb, unixjob_traverse_fn, &state);
 429                 release_print_db(pdb);
 430                 if (state.sysjob_to_jobid_value != (uint32)-1)
 431                         return state.sysjob_to_jobid_value;
 432         }
 433         return (uint32)-1;
 434 }
 435
 436 /****************************************************************************
 437  Send notifications based on what has changed after a pjob_store.
 438 ****************************************************************************/
 439
 440 static const struct {
 441         uint32 lpq_status;
 442         uint32 spoolss_status;
 443 } lpq_to_spoolss_status_map[] = {
 444         { LPQ_QUEUED, JOB_STATUS_QUEUED },
 445         { LPQ_PAUSED, JOB_STATUS_PAUSED },
 446         { LPQ_SPOOLING, JOB_STATUS_SPOOLING },
 447         { LPQ_PRINTING, JOB_STATUS_PRINTING },
 448         { LPQ_DELETING, JOB_STATUS_DELETING },
 449         { LPQ_OFFLINE, JOB_STATUS_OFFLINE },
 450         { LPQ_PAPEROUT, JOB_STATUS_PAPEROUT },
 451         { LPQ_PRINTED, JOB_STATUS_PRINTED },
 452         { LPQ_DELETED, JOB_STATUS_DELETED },
 453         { LPQ_BLOCKED, JOB_STATUS_BLOCKED_DEVQ },
 454         { LPQ_USER_INTERVENTION, JOB_STATUS_USER_INTERVENTION },
 455         { -1, 0 }
 456 };
 457
 458 /* Convert a lpq status value stored in printing.tdb into the
 459    appropriate win32 API constant. */
 460
 461 static uint32 map_to_spoolss_status(uint32 lpq_status)
 462 {
 463         int i = 0;
 464
 465         while (lpq_to_spoolss_status_map[i].lpq_status != -1) {
 466                 if (lpq_to_spoolss_status_map[i].lpq_status == lpq_status)
 467                         return lpq_to_spoolss_status_map[i].spoolss_status;
 468                 i++;
 469         }
 470
 471         return 0;
 472 }
 473
 474 static void pjob_store_notify(const char* sharename, uint32 jobid, struct printjob *old_data,
 475                               struct printjob *new_data)
 476 {
 477         bool new_job = False;
 478
 479         if (!old_data)
 480                 new_job = True;
 481
 482         /* Job attributes that can't be changed.  We only send
 483            notification for these on a new job. */
 484
 485         /* ACHTUNG!  Due to a bug in Samba's spoolss parsing of the
 486            NOTIFY_INFO_DATA buffer, we *have* to send the job submission
 487            time first or else we'll end up with potential alignment
 488            errors.  I don't think the systemtime should be spooled as
 489            a string, but this gets us around that error.
 490            --jerry (i'll feel dirty for this) */
 491
 492         if (new_job) {
 493                 notify_job_submitted(sharename, jobid, new_data->starttime);
 494                 notify_job_username(sharename, jobid, new_data->user);
 495         }
 496
 497         if (new_job || !strequal(old_data->jobname, new_data->jobname))
 498                 notify_job_name(sharename, jobid, new_data->jobname);
 499
 500         /* Job attributes of a new job or attributes that can be
 501            modified. */
 502
 503         if (new_job || !strequal(old_data->jobname, new_data->jobname))
 504                 notify_job_name(sharename, jobid, new_data->jobname);
 505
 506         if (new_job || old_data->status != new_data->status)
 507                 notify_job_status(sharename, jobid, map_to_spoolss_status(new_data->status));
 508
 509         if (new_job || old_data->size != new_data->size)
 510                 notify_job_total_bytes(sharename, jobid, new_data->size);
 511
 512         if (new_job || old_data->page_count != new_data->page_count)
 513                 notify_job_total_pages(sharename, jobid, new_data->page_count);
 514 }
 515
 516 /****************************************************************************
 517  Store a job structure back to the database.
 518 ****************************************************************************/
 519
 520 static bool pjob_store(const char* sharename, uint32 jobid, struct printjob *pjob)
 521 {
 522         uint32_t tmp;
 523         TDB_DATA                old_data, new_data;
 524         bool                    ret = False;
 525         struct tdb_print_db     *pdb = get_print_db_byname(sharename);
 526         uint8                   *buf = NULL;
 527         int                     len, newlen, buflen;
 528
 529
 530         if (!pdb)
 531                 return False;
 532
 533         /* Get old data */
 534
 535         old_data = tdb_fetch(pdb->tdb, print_key(jobid, &tmp));
 536
 537         /* Doh!  Now we have to pack/unpack data since the NT_DEVICEMODE was added */
 538
 539         newlen = 0;
 540
 541         do {
 542                 len = 0;
 543                 buflen = newlen;
 544                 len += tdb_pack(buf+len, buflen-len, "dddddddddffff",
 545                                 (uint32)pjob->pid,
 546                                 (uint32)pjob->sysjob,
 547                                 (uint32)pjob->fd,
 548                                 (uint32)pjob->starttime,
 549                                 (uint32)pjob->status,
 550                                 (uint32)pjob->size,
 551                                 (uint32)pjob->page_count,
 552                                 (uint32)pjob->spooled,
 553                                 (uint32)pjob->smbjob,
 554                                 pjob->filename,
 555                                 pjob->jobname,
 556                                 pjob->user,
 557                                 pjob->queuename);
 558
 559                 len += pack_devicemode(pjob->devmode, buf+len, buflen-len);
 560
 561                 if (buflen != len) {
 562                         buf = (uint8 *)SMB_REALLOC(buf, len);
 563                         if (!buf) {
 564                                 DEBUG(0,("pjob_store: failed to enlarge buffer!\n"));
 565                                 goto done;
 566                         }
 567                         newlen = len;
 568                 }
 569         } while ( buflen != len );
 570
 571
 572         /* Store new data */
 573
 574         new_data.dptr = buf;
 575         new_data.dsize = len;
 576         ret = (tdb_store(pdb->tdb, print_key(jobid, &tmp), new_data,
 577                          TDB_REPLACE) == 0);
 578
 579         release_print_db(pdb);
 580
 581         /* Send notify updates for what has changed */
 582
 583         if ( ret ) {
 584                 struct printjob old_pjob;
 585
 586                 if ( old_data.dsize )
 587                 {
 588                         if ( unpack_pjob( old_data.dptr, old_data.dsize, &old_pjob ) != -1 )
 589                         {
 590                                 pjob_store_notify( sharename, jobid, &old_pjob , pjob );
 591                                 talloc_free(old_pjob.devmode);
 592                         }
 593                 }
 594                 else {
 595                         /* new job */
 596                         pjob_store_notify( sharename, jobid, NULL, pjob );
 597                 }
 598         }
 599
 600 done:
 601         SAFE_FREE( old_data.dptr );
 602         SAFE_FREE( buf );
 603
 604         return ret;
 605 }
 606
 607 /****************************************************************************
 608  Remove a job structure from the database.
 609 ****************************************************************************/
 610
 611 void pjob_delete(const char* sharename, uint32 jobid)
 612 {
 613         uint32_t tmp;
 614         struct printjob *pjob;
 615         uint32 job_status = 0;
 616         struct tdb_print_db *pdb;
 617
 618         pdb = get_print_db_byname( sharename );
 619
 620         if (!pdb)
 621                 return;
 622
 623         pjob = print_job_find( sharename, jobid );
 624
 625         if (!pjob) {
 626                 DEBUG(5, ("pjob_delete: we were asked to delete nonexistent job %u\n",
 627                                         (unsigned int)jobid));
 628                 release_print_db(pdb);
 629                 return;
 630         }
 631
 632         /* We must cycle through JOB_STATUS_DELETING and
 633            JOB_STATUS_DELETED for the port monitor to delete the job
 634            properly. */
 635
 636         job_status = JOB_STATUS_DELETING|JOB_STATUS_DELETED;
 637         notify_job_status(sharename, jobid, job_status);
 638
 639         /* Remove from printing.tdb */
 640
 641         tdb_delete(pdb->tdb, print_key(jobid, &tmp));
 642         remove_from_jobs_changed(sharename, jobid);
 643         release_print_db( pdb );
 644         rap_jobid_delete(sharename, jobid);
 645 }
 646
 647 /****************************************************************************
 648  List a unix job in the print database.
 649 ****************************************************************************/
 650
 651 static void print_unix_job(const char *sharename, print_queue_struct *q, uint32 jobid)
 652 {
 653         struct printjob pj, *old_pj;
 654
 655         if (jobid == (uint32)-1)
 656                 jobid = q->job + UNIX_JOB_START;
 657
 658         /* Preserve the timestamp on an existing unix print job */
 659
 660         old_pj = print_job_find(sharename, jobid);
 661
 662         ZERO_STRUCT(pj);
 663
 664         pj.pid = (pid_t)-1;
 665         pj.sysjob = q->job;
 666         pj.fd = -1;
 667         pj.starttime = old_pj ? old_pj->starttime : q->time;
 668         pj.status = q->status;
 669         pj.size = q->size;
 670         pj.spooled = True;
 671         fstrcpy(pj.filename, old_pj ? old_pj->filename : "");
 672         if (jobid < UNIX_JOB_START) {
 673                 pj.smbjob = True;
 674                 fstrcpy(pj.jobname, old_pj ? old_pj->jobname : "Remote Downlevel Document");
 675         } else {
 676                 pj.smbjob = False;
 677                 fstrcpy(pj.jobname, old_pj ? old_pj->jobname : q->fs_file);
 678         }
 679         fstrcpy(pj.user, old_pj ? old_pj->user : q->fs_user);
 680         fstrcpy(pj.queuename, old_pj ? old_pj->queuename : sharename );
 681
 682         pjob_store(sharename, jobid, &pj);
 683 }
 684
 685
 686 struct traverse_struct {
 687         print_queue_struct *queue;
 688         int qcount, snum, maxcount, total_jobs;
 689         const char *sharename;
 690         time_t lpq_time;
 691         const char *lprm_command;
 692         struct printif *print_if;
 693 };
 694
 695 /****************************************************************************
 696  Utility fn to delete any jobs that are no longer active.
 697 ****************************************************************************/
 698
 699 static int traverse_fn_delete(TDB_CONTEXT *t, TDB_DATA key, TDB_DATA data, void *state)
 700 {
 701         struct traverse_struct *ts = (struct traverse_struct *)state;
 702         struct printjob pjob;
 703         uint32 jobid;
 704         int i = 0;
 705
 706         if (  key.dsize != sizeof(jobid) )
 707                 return 0;
 708
 709         jobid = IVAL(key.dptr, 0);
 710         if ( unpack_pjob( data.dptr, data.dsize, &pjob ) == -1 )
 711                 return 0;
 712         talloc_free(pjob.devmode);
 713
 714
 715         if (!pjob.smbjob) {
 716                 /* remove a unix job if it isn't in the system queue any more */
 717
 718                 for (i=0;i<ts->qcount;i++) {
 719                         uint32 u_jobid = (ts->queue[i].job + UNIX_JOB_START);
 720                         if (jobid == u_jobid)
 721                                 break;
 722                 }
 723                 if (i == ts->qcount) {
 724                         DEBUG(10,("traverse_fn_delete: pjob %u deleted due to !smbjob\n",
 725                                                 (unsigned int)jobid ));
 726                         pjob_delete(ts->sharename, jobid);
 727                         return 0;
 728                 }
 729
 730                 /* need to continue the the bottom of the function to
 731                    save the correct attributes */
 732         }
 733
 734         /* maybe it hasn't been spooled yet */
 735         if (!pjob.spooled) {
 736                 /* if a job is not spooled and the process doesn't
 737                    exist then kill it. This cleans up after smbd
 738                    deaths */
 739                 if (!process_exists_by_pid(pjob.pid)) {
 740                         DEBUG(10,("traverse_fn_delete: pjob %u deleted due to !process_exists (%u)\n",
 741                                                 (unsigned int)jobid, (unsigned int)pjob.pid ));
 742                         pjob_delete(ts->sharename, jobid);
 743                 } else
 744                         ts->total_jobs++;
 745                 return 0;
 746         }
 747
 748         /* this check only makes sense for jobs submitted from Windows clients */
 749
 750         if ( pjob.smbjob ) {
 751                 for (i=0;i<ts->qcount;i++) {
 752                         uint32 curr_jobid;
 753
 754                         if ( pjob.status == LPQ_DELETED )
 755                                 continue;
 756
 757                         curr_jobid = print_parse_jobid(ts->queue[i].fs_file);
 758
 759                         if (jobid == curr_jobid) {
 760
 761                                 /* try to clean up any jobs that need to be deleted */
 762
 763                                 if ( pjob.status == LPQ_DELETING ) {
 764                                         int result;
 765
 766                                         result = (*(ts->print_if->job_delete))(
 767                                                 ts->sharename, ts->lprm_command, &pjob );
 768
 769                                         if ( result != 0 ) {
 770                                                 /* if we can't delete, then reset the job status */
 771                                                 pjob.status = LPQ_QUEUED;
 772                                                 pjob_store(ts->sharename, jobid, &pjob);
 773                                         }
 774                                         else {
 775                                                 /* if we deleted the job, the remove the tdb record */
 776                                                 pjob_delete(ts->sharename, jobid);
 777                                                 pjob.status = LPQ_DELETED;
 778                                         }
 779
 780                                 }
 781
 782                                 break;
 783                         }
 784                 }
 785         }
 786
 787         /* The job isn't in the system queue - we have to assume it has
 788            completed, so delete the database entry. */
 789
 790         if (i == ts->qcount) {
 791
 792                 /* A race can occur between the time a job is spooled and
 793                    when it appears in the lpq output.  This happens when
 794                    the job is added to printing.tdb when another smbd
 795                    running print_queue_update() has completed a lpq and
 796                    is currently traversing the printing tdb and deleting jobs.
 797                    Don't delete the job if it was submitted after the lpq_time. */
 798
 799                 if (pjob.starttime < ts->lpq_time) {
 800                         DEBUG(10,("traverse_fn_delete: pjob %u deleted due to pjob.starttime (%u) < ts->lpq_time (%u)\n",
 801                                                 (unsigned int)jobid,
 802                                                 (unsigned int)pjob.starttime,
 803                                                 (unsigned int)ts->lpq_time ));
 804                         pjob_delete(ts->sharename, jobid);
 805                 } else
 806                         ts->total_jobs++;
 807                 return 0;
 808         }
 809
 810         /* Save the pjob attributes we will store.
 811            FIXME!!! This is the only place where queue->job
 812            represents the SMB jobid      --jerry */
 813
 814         ts->queue[i].job = jobid;
 815         ts->queue[i].size = pjob.size;
 816         ts->queue[i].page_count = pjob.page_count;
 817         ts->queue[i].status = pjob.status;
 818         ts->queue[i].priority = 1;
 819         ts->queue[i].time = pjob.starttime;
 820         fstrcpy(ts->queue[i].fs_user, pjob.user);
 821         fstrcpy(ts->queue[i].fs_file, pjob.jobname);
 822
 823         ts->total_jobs++;
 824
 825         return 0;
 826 }
 827
 828 /****************************************************************************
 829  Check if the print queue has been updated recently enough.
 830 ****************************************************************************/
 831
 832 static void print_cache_flush(const char *sharename)
 833 {
 834         fstring key;
 835         struct tdb_print_db *pdb = get_print_db_byname(sharename);
 836
 837         if (!pdb)
 838                 return;
 839         slprintf(key, sizeof(key)-1, "CACHE/%s", sharename);
 840         tdb_store_int32(pdb->tdb, key, -1);
 841         release_print_db(pdb);
 842 }
 843
 844 /****************************************************************************
 845  Check if someone already thinks they are doing the update.
 846 ****************************************************************************/
 847
 848 static pid_t get_updating_pid(const char *sharename)
 849 {
 850         fstring keystr;
 851         TDB_DATA data, key;
 852         pid_t updating_pid;
 853         struct tdb_print_db *pdb = get_print_db_byname(sharename);
 854
 855         if (!pdb)
 856                 return (pid_t)-1;
 857         slprintf(keystr, sizeof(keystr)-1, "UPDATING/%s", sharename);
 858         key = string_tdb_data(keystr);
 859
 860         data = tdb_fetch(pdb->tdb, key);
 861         release_print_db(pdb);
 862         if (!data.dptr || data.dsize != sizeof(pid_t)) {
 863                 SAFE_FREE(data.dptr);
 864                 return (pid_t)-1;
 865         }
 866
 867         updating_pid = IVAL(data.dptr, 0);
 868         SAFE_FREE(data.dptr);
 869
 870         if (process_exists_by_pid(updating_pid))
 871                 return updating_pid;
 872
 873         return (pid_t)-1;
 874 }
 875
 876 /****************************************************************************
 877  Set the fact that we're doing the update, or have finished doing the update
 878  in the tdb.
 879 ****************************************************************************/
 880
 881 static void set_updating_pid(const fstring sharename, bool updating)
 882 {
 883         fstring keystr;
 884         TDB_DATA key;
 885         TDB_DATA data;
 886         pid_t updating_pid = sys_getpid();
 887         uint8 buffer[4];
 888
 889         struct tdb_print_db *pdb = get_print_db_byname(sharename);
 890
 891         if (!pdb)
 892                 return;
 893
 894         slprintf(keystr, sizeof(keystr)-1, "UPDATING/%s", sharename);
 895         key = string_tdb_data(keystr);
 896
 897         DEBUG(5, ("set_updating_pid: %s updating lpq cache for print share %s\n",
 898                 updating ? "" : "not ",
 899                 sharename ));
 900
 901         if ( !updating ) {
 902                 tdb_delete(pdb->tdb, key);
 903                 release_print_db(pdb);
 904                 return;
 905         }
 906
 907         SIVAL( buffer, 0, updating_pid);
 908         data.dptr = buffer;
 909         data.dsize = 4;         /* we always assume this is a 4 byte value */
 910
 911         tdb_store(pdb->tdb, key, data, TDB_REPLACE);
 912         release_print_db(pdb);
 913 }
 914
 915 /****************************************************************************
 916  Sort print jobs by submittal time.
 917 ****************************************************************************/
 918
 919 static int printjob_comp(print_queue_struct *j1, print_queue_struct *j2)
 920 {
 921         /* Silly cases */
 922
 923         if (!j1 && !j2)
 924                 return 0;
 925         if (!j1)
 926                 return -1;
 927         if (!j2)
 928                 return 1;
 929
 930         /* Sort on job start time */
 931
 932         if (j1->time == j2->time)
 933                 return 0;
 934         return (j1->time > j2->time) ? 1 : -1;
 935 }
 936
 937 /****************************************************************************
 938  Store the sorted queue representation for later portmon retrieval.
 939  Skip deleted jobs
 940 ****************************************************************************/
 941
 942 static void store_queue_struct(struct tdb_print_db *pdb, struct traverse_struct *pts)
 943 {
 944         TDB_DATA data;
 945         int max_reported_jobs = lp_max_reported_jobs(pts->snum);
 946         print_queue_struct *queue = pts->queue;
 947         size_t len;
 948         size_t i;
 949         unsigned int qcount;
 950
 951         if (max_reported_jobs && (max_reported_jobs < pts->qcount))
 952                 pts->qcount = max_reported_jobs;
 953         qcount = 0;
 954
 955         /* Work out the size. */
 956         data.dsize = 0;
 957         data.dsize += tdb_pack(NULL, 0, "d", qcount);
 958
 959         for (i = 0; i < pts->qcount; i++) {
 960                 if ( queue[i].status == LPQ_DELETED )
 961                         continue;
 962
 963                 qcount++;
 964                 data.dsize += tdb_pack(NULL, 0, "ddddddff",
 965                                 (uint32)queue[i].job,
 966                                 (uint32)queue[i].size,
 967                                 (uint32)queue[i].page_count,
 968                                 (uint32)queue[i].status,
 969                                 (uint32)queue[i].priority,
 970                                 (uint32)queue[i].time,
 971                                 queue[i].fs_user,
 972                                 queue[i].fs_file);
 973         }
 974
 975         if ((data.dptr = (uint8 *)SMB_MALLOC(data.dsize)) == NULL)
 976                 return;
 977
 978         len = 0;
 979         len += tdb_pack(data.dptr + len, data.dsize - len, "d", qcount);
 980         for (i = 0; i < pts->qcount; i++) {
 981                 if ( queue[i].status == LPQ_DELETED )
 982                         continue;
 983
 984                 len += tdb_pack(data.dptr + len, data.dsize - len, "ddddddff",
 985                                 (uint32)queue[i].job,
 986                                 (uint32)queue[i].size,
 987                                 (uint32)queue[i].page_count,
 988                                 (uint32)queue[i].status,
 989                                 (uint32)queue[i].priority,
 990                                 (uint32)queue[i].time,
 991                                 queue[i].fs_user,
 992                                 queue[i].fs_file);
 993         }
 994
 995         tdb_store(pdb->tdb, string_tdb_data("INFO/linear_queue_array"), data,
 996                   TDB_REPLACE);
 997         SAFE_FREE(data.dptr);
 998         return;
 999 }
1000
1001 static TDB_DATA get_jobs_changed_data(struct tdb_print_db *pdb)
1002 {
1003         TDB_DATA data;
1004
1005         ZERO_STRUCT(data);
1006
1007         data = tdb_fetch(pdb->tdb, string_tdb_data("INFO/jobs_changed"));
1008         if (data.dptr == NULL || data.dsize == 0 || (data.dsize % 4 != 0)) {
1009                 SAFE_FREE(data.dptr);
1010                 ZERO_STRUCT(data);
1011         }
1012
1013         return data;
1014 }
1015
1016 static void check_job_changed(const char *sharename, TDB_DATA data, uint32 jobid)
1017 {
1018         unsigned int i;
1019         unsigned int job_count = data.dsize / 4;
1020
1021         for (i = 0; i < job_count; i++) {
1022                 uint32 ch_jobid;
1023
1024                 ch_jobid = IVAL(data.dptr, i*4);
1025                 if (ch_jobid == jobid)
1026                         remove_from_jobs_changed(sharename, jobid);
1027         }
1028 }
1029
1030 /****************************************************************************
1031  Check if the print queue has been updated recently enough.
1032 ****************************************************************************/
1033
1034 static bool print_cache_expired(const char *sharename, bool check_pending)
1035 {
1036         fstring key;
1037         time_t last_qscan_time, time_now = time(NULL);
1038         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1039         bool result = False;
1040
1041         if (!pdb)
1042                 return False;
1043
1044         snprintf(key, sizeof(key), "CACHE/%s", sharename);
1045         last_qscan_time = (time_t)tdb_fetch_int32(pdb->tdb, key);
1046
1047         /*
1048          * Invalidate the queue for 3 reasons.
1049          * (1). last queue scan time == -1.
1050          * (2). Current time - last queue scan time > allowed cache time.
1051          * (3). last queue scan time > current time + MAX_CACHE_VALID_TIME (1 hour by default).
1052          * This last test picks up machines for which the clock has been moved
1053          * forward, an lpq scan done and then the clock moved back. Otherwise
1054          * that last lpq scan would stay around for a loooong loooong time... :-). JRA.
1055          */
1056
1057         if (last_qscan_time == ((time_t)-1)
1058                 || (time_now - last_qscan_time) >= lp_lpqcachetime()
1059                 || last_qscan_time > (time_now + MAX_CACHE_VALID_TIME))
1060         {
1061                 uint32 u;
1062                 time_t msg_pending_time;
1063
1064                 DEBUG(4, ("print_cache_expired: cache expired for queue %s "
1065                         "(last_qscan_time = %d, time now = %d, qcachetime = %d)\n",
1066                         sharename, (int)last_qscan_time, (int)time_now,
1067                         (int)lp_lpqcachetime() ));
1068
1069                 /* check if another smbd has already sent a message to update the
1070                    queue.  Give the pending message one minute to clear and
1071                    then send another message anyways.  Make sure to check for
1072                    clocks that have been run forward and then back again. */
1073
1074                 snprintf(key, sizeof(key), "MSG_PENDING/%s", sharename);
1075
1076                 if ( check_pending
1077                         && tdb_fetch_uint32( pdb->tdb, key, &u )
1078                         && (msg_pending_time=u) > 0
1079                         && msg_pending_time <= time_now
1080                         && (time_now - msg_pending_time) < 60 )
1081                 {
1082                         DEBUG(4,("print_cache_expired: message already pending for %s.  Accepting cache\n",
1083                                 sharename));
1084                         goto done;
1085                 }
1086
1087                 result = True;
1088         }
1089
1090 done:
1091         release_print_db(pdb);
1092         return result;
1093 }
1094
1095 /****************************************************************************
1096  main work for updating the lpq cahe for a printer queue
1097 ****************************************************************************/
1098
1099 static void print_queue_update_internal( const char *sharename,
1100                                          struct printif *current_printif,
1101                                          char *lpq_command, char *lprm_command )
1102 {
1103         int i, qcount;
1104         print_queue_struct *queue = NULL;
1105         print_status_struct status;
1106         print_status_struct old_status;
1107         struct printjob *pjob;
1108         struct traverse_struct tstruct;
1109         TDB_DATA data, key;
1110         TDB_DATA jcdata;
1111         fstring keystr, cachestr;
1112         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1113
1114         if (!pdb) {
1115                 return;
1116         }
1117
1118         DEBUG(5,("print_queue_update_internal: printer = %s, type = %d, lpq command = [%s]\n",
1119                 sharename, current_printif->type, lpq_command));
1120
1121         /*
1122          * Update the cache time FIRST ! Stops others even
1123          * attempting to get the lock and doing this
1124          * if the lpq takes a long time.
1125          */
1126
1127         slprintf(cachestr, sizeof(cachestr)-1, "CACHE/%s", sharename);
1128         tdb_store_int32(pdb->tdb, cachestr, (int)time(NULL));
1129
1130         /* get the current queue using the appropriate interface */
1131         ZERO_STRUCT(status);
1132
1133         qcount = (*(current_printif->queue_get))(sharename,
1134                 current_printif->type,
1135                 lpq_command, &queue, &status);
1136
1137         DEBUG(3, ("print_queue_update_internal: %d job%s in queue for %s\n",
1138                 qcount, (qcount != 1) ? "s" : "", sharename));
1139
1140         /* Sort the queue by submission time otherwise they are displayed
1141            in hash order. */
1142
1143         TYPESAFE_QSORT(queue, qcount, printjob_comp);
1144
1145         /*
1146           any job in the internal database that is marked as spooled
1147           and doesn't exist in the system queue is considered finished
1148           and removed from the database
1149
1150           any job in the system database but not in the internal database
1151           is added as a unix job
1152
1153           fill in any system job numbers as we go
1154         */
1155
1156         jcdata = get_jobs_changed_data(pdb);
1157
1158         for (i=0; i<qcount; i++) {
1159                 uint32 jobid = print_parse_jobid(queue[i].fs_file);
1160
1161                 if (jobid == (uint32)-1) {
1162                         /* assume its a unix print job */
1163                         print_unix_job(sharename, &queue[i], jobid);
1164                         continue;
1165                 }
1166
1167                 /* we have an active SMB print job - update its status */
1168                 pjob = print_job_find(sharename, jobid);
1169                 if (!pjob) {
1170                         /* err, somethings wrong. Probably smbd was restarted
1171                            with jobs in the queue. All we can do is treat them
1172                            like unix jobs. Pity. */
1173                         print_unix_job(sharename, &queue[i], jobid);
1174                         continue;
1175                 }
1176
1177                 pjob->sysjob = queue[i].job;
1178
1179                 /* don't reset the status on jobs to be deleted */
1180
1181                 if ( pjob->status != LPQ_DELETING )
1182                         pjob->status = queue[i].status;
1183
1184                 pjob_store(sharename, jobid, pjob);
1185
1186                 check_job_changed(sharename, jcdata, jobid);
1187         }
1188
1189         SAFE_FREE(jcdata.dptr);
1190
1191         /* now delete any queued entries that don't appear in the
1192            system queue */
1193         tstruct.queue = queue;
1194         tstruct.qcount = qcount;
1195         tstruct.snum = -1;
1196         tstruct.total_jobs = 0;
1197         tstruct.lpq_time = time(NULL);
1198         tstruct.sharename = sharename;
1199         tstruct.lprm_command = lprm_command;
1200         tstruct.print_if = current_printif;
1201
1202         tdb_traverse(pdb->tdb, traverse_fn_delete, (void *)&tstruct);
1203
1204         /* Store the linearised queue, max jobs only. */
1205         store_queue_struct(pdb, &tstruct);
1206
1207         SAFE_FREE(tstruct.queue);
1208
1209         DEBUG(10,("print_queue_update_internal: printer %s INFO/total_jobs = %d\n",
1210                                 sharename, tstruct.total_jobs ));
1211
1212         tdb_store_int32(pdb->tdb, "INFO/total_jobs", tstruct.total_jobs);
1213
1214         get_queue_status(sharename, &old_status);
1215         if (old_status.qcount != qcount)
1216                 DEBUG(10,("print_queue_update_internal: queue status change %d jobs -> %d jobs for printer %s\n",
1217                                         old_status.qcount, qcount, sharename));
1218
1219         /* store the new queue status structure */
1220         slprintf(keystr, sizeof(keystr)-1, "STATUS/%s", sharename);
1221         key = string_tdb_data(keystr);
1222
1223         status.qcount = qcount;
1224         data.dptr = (uint8 *)&status;
1225         data.dsize = sizeof(status);
1226         tdb_store(pdb->tdb, key, data, TDB_REPLACE);
1227
1228         /*
1229          * Update the cache time again. We want to do this call
1230          * as little as possible...
1231          */
1232
1233         slprintf(keystr, sizeof(keystr)-1, "CACHE/%s", sharename);
1234         tdb_store_int32(pdb->tdb, keystr, (int32)time(NULL));
1235
1236         /* clear the msg pending record for this queue */
1237
1238         snprintf(keystr, sizeof(keystr), "MSG_PENDING/%s", sharename);
1239
1240         if ( !tdb_store_uint32( pdb->tdb, keystr, 0 ) ) {
1241                 /* log a message but continue on */
1242
1243                 DEBUG(0,("print_queue_update: failed to store MSG_PENDING flag for [%s]!\n",
1244                         sharename));
1245         }
1246
1247         release_print_db( pdb );
1248
1249         return;
1250 }
1251
1252 /****************************************************************************
1253  Update the internal database from the system print queue for a queue.
1254  obtain a lock on the print queue before proceeding (needed when mutiple
1255  smbd processes maytry to update the lpq cache concurrently).
1256 ****************************************************************************/
1257
1258 static void print_queue_update_with_lock( const char *sharename,
1259                                           struct printif *current_printif,
1260                                           char *lpq_command, char *lprm_command )
1261 {
1262         fstring keystr;
1263         struct tdb_print_db *pdb;
1264
1265         DEBUG(5,("print_queue_update_with_lock: printer share = %s\n", sharename));
1266         pdb = get_print_db_byname(sharename);
1267         if (!pdb)
1268                 return;
1269
1270         if ( !print_cache_expired(sharename, False) ) {
1271                 DEBUG(5,("print_queue_update_with_lock: print cache for %s is still ok\n", sharename));
1272                 release_print_db(pdb);
1273                 return;
1274         }
1275
1276         /*
1277          * Check to see if someone else is doing this update.
1278          * This is essentially a mutex on the update.
1279          */
1280
1281         if (get_updating_pid(sharename) != -1) {
1282                 release_print_db(pdb);
1283                 return;
1284         }
1285
1286         /* Lock the queue for the database update */
1287
1288         slprintf(keystr, sizeof(keystr) - 1, "LOCK/%s", sharename);
1289         /* Only wait 10 seconds for this. */
1290         if (tdb_lock_bystring_with_timeout(pdb->tdb, keystr, 10) == -1) {
1291                 DEBUG(0,("print_queue_update_with_lock: Failed to lock printer %s database\n", sharename));
1292                 release_print_db(pdb);
1293                 return;
1294         }
1295
1296         /*
1297          * Ensure that no one else got in here.
1298          * If the updating pid is still -1 then we are
1299          * the winner.
1300          */
1301
1302         if (get_updating_pid(sharename) != -1) {
1303                 /*
1304                  * Someone else is doing the update, exit.
1305                  */
1306                 tdb_unlock_bystring(pdb->tdb, keystr);
1307                 release_print_db(pdb);
1308                 return;
1309         }
1310
1311         /*
1312          * We're going to do the update ourselves.
1313          */
1314
1315         /* Tell others we're doing the update. */
1316         set_updating_pid(sharename, True);
1317
1318         /*
1319          * Allow others to enter and notice we're doing
1320          * the update.
1321          */
1322
1323         tdb_unlock_bystring(pdb->tdb, keystr);
1324
1325         /* do the main work now */
1326
1327         print_queue_update_internal( sharename, current_printif,
1328                 lpq_command, lprm_command );
1329
1330         /* Delete our pid from the db. */
1331         set_updating_pid(sharename, False);
1332         release_print_db(pdb);
1333 }
1334
1335 /****************************************************************************
1336 this is the receive function of the background lpq updater
1337 ****************************************************************************/
1338 static void print_queue_receive(struct messaging_context *msg,
1339                                 void *private_data,
1340                                 uint32_t msg_type,
1341                                 struct server_id server_id,
1342                                 DATA_BLOB *data)
1343 {
1344         fstring sharename;
1345         char *lpqcommand = NULL, *lprmcommand = NULL;
1346         int printing_type;
1347         size_t len;
1348
1349         len = tdb_unpack( (uint8 *)data->data, data->length, "fdPP",
1350                 sharename,
1351                 &printing_type,
1352                 &lpqcommand,
1353                 &lprmcommand );
1354
1355         if ( len == -1 ) {
1356                 SAFE_FREE(lpqcommand);
1357                 SAFE_FREE(lprmcommand);
1358                 DEBUG(0,("print_queue_receive: Got invalid print queue update message\n"));
1359                 return;
1360         }
1361
1362         print_queue_update_with_lock(sharename,
1363                 get_printer_fns_from_type((enum printing_types)printing_type),
1364                 lpqcommand, lprmcommand );
1365
1366         SAFE_FREE(lpqcommand);
1367         SAFE_FREE(lprmcommand);
1368         return;
1369 }
1370
1371 static void printing_pause_fd_handler(struct tevent_context *ev,
1372                                       struct tevent_fd *fde,
1373                                       uint16_t flags,
1374                                       void *private_data)
1375 {
1376         /*
1377          * If pause_pipe[1] is closed it means the parent smbd
1378          * and children exited or aborted.
1379          */
1380         exit_server_cleanly(NULL);
1381 }
1382
1383 extern struct child_pid *children;
1384 extern int num_children;
1385
1386 static void add_child_pid(pid_t pid)
1387 {
1388         struct child_pid *child;
1389
1390         child = SMB_MALLOC_P(struct child_pid);
1391         if (child == NULL) {
1392                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
1393                 return;
1394         }
1395         child->pid = pid;
1396         DLIST_ADD(children, child);
1397         num_children += 1;
1398 }
1399
1400 static pid_t background_lpq_updater_pid = -1;
1401
1402 /****************************************************************************
1403 main thread of the background lpq updater
1404 ****************************************************************************/
1405 void start_background_queue(void)
1406 {
1407         /* Use local variables for this as we don't
1408          * need to save the parent side of this, just
1409          * ensure it closes when the process exits.
1410          */
1411         int pause_pipe[2];
1412
1413         DEBUG(3,("start_background_queue: Starting background LPQ thread\n"));
1414
1415         if (pipe(pause_pipe) == -1) {
1416                 DEBUG(5,("start_background_queue: cannot create pipe. %s\n", strerror(errno) ));
1417                 exit(1);
1418         }
1419
1420         background_lpq_updater_pid = sys_fork();
1421
1422         if (background_lpq_updater_pid == -1) {
1423                 DEBUG(5,("start_background_queue: background LPQ thread failed to start. %s\n", strerror(errno) ));
1424                 exit(1);
1425         }
1426
1427         /* Track the printing pid along with other smbd children */
1428         add_child_pid(background_lpq_updater_pid);
1429
1430         if(background_lpq_updater_pid == 0) {
1431                 struct tevent_fd *fde;
1432                 int ret;
1433                 NTSTATUS status;
1434
1435                 /* Child. */
1436                 DEBUG(5,("start_background_queue: background LPQ thread started\n"));
1437
1438                 close(pause_pipe[0]);
1439                 pause_pipe[0] = -1;
1440
1441                 status = reinit_after_fork(server_messaging_context(),
1442                                            server_event_context(),
1443                                            procid_self(), true);
1444
1445                 if (!NT_STATUS_IS_OK(status)) {
1446                         DEBUG(0,("reinit_after_fork() failed\n"));
1447                         smb_panic("reinit_after_fork() failed");
1448                 }
1449
1450                 smbd_setup_sig_term_handler();
1451                 smbd_setup_sig_hup_handler();
1452
1453                 if (!serverid_register(procid_self(),
1454                                        FLAG_MSG_GENERAL|FLAG_MSG_SMBD
1455                                        |FLAG_MSG_PRINT_GENERAL)) {
1456                         exit(1);
1457                 }
1458
1459                 if (!locking_init()) {
1460                         exit(1);
1461                 }
1462
1463                 messaging_register(server_messaging_context(), NULL,
1464                                    MSG_PRINTER_UPDATE, print_queue_receive);
1465
1466                 fde = tevent_add_fd(server_event_context(),
1467                                     server_event_context(),
1468                                     pause_pipe[1], TEVENT_FD_READ,
1469                                     printing_pause_fd_handler,
1470                                     NULL);
1471                 if (!fde) {
1472                         DEBUG(0,("tevent_add_fd() failed for pause_pipe\n"));
1473                         smb_panic("tevent_add_fd() failed for pause_pipe");
1474                 }
1475
1476                 DEBUG(5,("start_background_queue: background LPQ thread waiting for messages\n"));
1477                 ret = tevent_loop_wait(server_event_context());
1478                 /* should not be reached */
1479                 DEBUG(0,("background_queue: tevent_loop_wait() exited with %d - %s\n",
1480                          ret, (ret == 0) ? "out of events" : strerror(errno)));
1481                 exit(1);
1482         }
1483
1484         close(pause_pipe[1]);
1485 }
1486
1487 /****************************************************************************
1488 update the internal database from the system print queue for a queue
1489 ****************************************************************************/
1490
1491 static void print_queue_update(int snum, bool force)
1492 {
1493         fstring key;
1494         fstring sharename;
1495         char *lpqcommand = NULL;
1496         char *lprmcommand = NULL;
1497         uint8 *buffer = NULL;
1498         size_t len = 0;
1499         size_t newlen;
1500         struct tdb_print_db *pdb;
1501         int type;
1502         struct printif *current_printif;
1503         TALLOC_CTX *ctx = talloc_tos();
1504
1505         fstrcpy( sharename, lp_const_servicename(snum));
1506
1507         /* don't strip out characters like '$' from the printername */
1508
1509         lpqcommand = talloc_string_sub2(ctx,
1510                         lp_lpqcommand(snum),
1511                         "%p",
1512                         lp_printername(snum),
1513                         false, false, false);
1514         if (!lpqcommand) {
1515                 return;
1516         }
1517         lpqcommand = talloc_sub_advanced(ctx,
1518                         lp_servicename(snum),
1519                         current_user_info.unix_name,
1520                         "",
1521                         current_user.ut.gid,
1522                         get_current_username(),
1523                         current_user_info.domain,
1524                         lpqcommand);
1525         if (!lpqcommand) {
1526                 return;
1527         }
1528
1529         lprmcommand = talloc_string_sub2(ctx,
1530                         lp_lprmcommand(snum),
1531                         "%p",
1532                         lp_printername(snum),
1533                         false, false, false);
1534         if (!lprmcommand) {
1535                 return;
1536         }
1537         lprmcommand = talloc_sub_advanced(ctx,
1538                         lp_servicename(snum),
1539                         current_user_info.unix_name,
1540                         "",
1541                         current_user.ut.gid,
1542                         get_current_username(),
1543                         current_user_info.domain,
1544                         lprmcommand);
1545         if (!lprmcommand) {
1546                 return;
1547         }
1548
1549         /*
1550          * Make sure that the background queue process exists.
1551          * Otherwise just do the update ourselves
1552          */
1553
1554         if ( force || background_lpq_updater_pid == -1 ) {
1555                 DEBUG(4,("print_queue_update: updating queue [%s] myself\n", sharename));
1556                 current_printif = get_printer_fns( snum );
1557                 print_queue_update_with_lock( sharename, current_printif, lpqcommand, lprmcommand );
1558
1559                 return;
1560         }
1561
1562         type = lp_printing(snum);
1563
1564         /* get the length */
1565
1566         len = tdb_pack( NULL, 0, "fdPP",
1567                 sharename,
1568                 type,
1569                 lpqcommand,
1570                 lprmcommand );
1571
1572         buffer = SMB_XMALLOC_ARRAY( uint8, len );
1573
1574         /* now pack the buffer */
1575         newlen = tdb_pack( buffer, len, "fdPP",
1576                 sharename,
1577                 type,
1578                 lpqcommand,
1579                 lprmcommand );
1580
1581         SMB_ASSERT( newlen == len );
1582
1583         DEBUG(10,("print_queue_update: Sending message -> printer = %s, "
1584                 "type = %d, lpq command = [%s] lprm command = [%s]\n",
1585                 sharename, type, lpqcommand, lprmcommand ));
1586
1587         /* here we set a msg pending record for other smbd processes
1588            to throttle the number of duplicate print_queue_update msgs
1589            sent.  */
1590
1591         pdb = get_print_db_byname(sharename);
1592         if (!pdb) {
1593                 SAFE_FREE(buffer);
1594                 return;
1595         }
1596
1597         snprintf(key, sizeof(key), "MSG_PENDING/%s", sharename);
1598
1599         if ( !tdb_store_uint32( pdb->tdb, key, time(NULL) ) ) {
1600                 /* log a message but continue on */
1601
1602                 DEBUG(0,("print_queue_update: failed to store MSG_PENDING flag for [%s]!\n",
1603                         sharename));
1604         }
1605
1606         release_print_db( pdb );
1607
1608         /* finally send the message */
1609
1610         messaging_send_buf(server_messaging_context(),
1611                            pid_to_procid(background_lpq_updater_pid),
1612                            MSG_PRINTER_UPDATE, (uint8 *)buffer, len);
1613
1614         SAFE_FREE( buffer );
1615
1616         return;
1617 }
1618
1619 /****************************************************************************
1620  Create/Update an entry in the print tdb that will allow us to send notify
1621  updates only to interested smbd's.
1622 ****************************************************************************/
1623
1624 bool print_notify_register_pid(int snum)
1625 {
1626         TDB_DATA data;
1627         struct tdb_print_db *pdb = NULL;
1628         TDB_CONTEXT *tdb = NULL;
1629         const char *printername;
1630         uint32 mypid = (uint32)sys_getpid();
1631         bool ret = False;
1632         size_t i;
1633
1634         /* if (snum == -1), then the change notify request was
1635            on a print server handle and we need to register on
1636            all print queus */
1637
1638         if (snum == -1)
1639         {
1640                 int num_services = lp_numservices();
1641                 int idx;
1642
1643                 for ( idx=0; idx<num_services; idx++ ) {
1644                         if (lp_snum_ok(idx) && lp_print_ok(idx) )
1645                                 print_notify_register_pid(idx);
1646                 }
1647
1648                 return True;
1649         }
1650         else /* register for a specific printer */
1651         {
1652                 printername = lp_const_servicename(snum);
1653                 pdb = get_print_db_byname(printername);
1654                 if (!pdb)
1655                         return False;
1656                 tdb = pdb->tdb;
1657         }
1658
1659         if (tdb_lock_bystring_with_timeout(tdb, NOTIFY_PID_LIST_KEY, 10) == -1) {
1660                 DEBUG(0,("print_notify_register_pid: Failed to lock printer %s\n",
1661                                         printername));
1662                 if (pdb)
1663                         release_print_db(pdb);
1664                 return False;
1665         }
1666
1667         data = get_printer_notify_pid_list( tdb, printername, True );
1668
1669         /* Add ourselves and increase the refcount. */
1670
1671         for (i = 0; i < data.dsize; i += 8) {
1672                 if (IVAL(data.dptr,i) == mypid) {
1673                         uint32 new_refcount = IVAL(data.dptr, i+4) + 1;
1674                         SIVAL(data.dptr, i+4, new_refcount);
1675                         break;
1676                 }
1677         }
1678
1679         if (i == data.dsize) {
1680                 /* We weren't in the list. Realloc. */
1681                 data.dptr = (uint8 *)SMB_REALLOC(data.dptr, data.dsize + 8);
1682                 if (!data.dptr) {
1683                         DEBUG(0,("print_notify_register_pid: Relloc fail for printer %s\n",
1684                                                 printername));
1685                         goto done;
1686                 }
1687                 data.dsize += 8;
1688                 SIVAL(data.dptr,data.dsize - 8,mypid);
1689                 SIVAL(data.dptr,data.dsize - 4,1); /* Refcount. */
1690         }
1691
1692         /* Store back the record. */
1693         if (tdb_store_bystring(tdb, NOTIFY_PID_LIST_KEY, data, TDB_REPLACE) == -1) {
1694                 DEBUG(0,("print_notify_register_pid: Failed to update pid \
1695 list for printer %s\n", printername));
1696                 goto done;
1697         }
1698
1699         ret = True;
1700
1701  done:
1702
1703         tdb_unlock_bystring(tdb, NOTIFY_PID_LIST_KEY);
1704         if (pdb)
1705                 release_print_db(pdb);
1706         SAFE_FREE(data.dptr);
1707         return ret;
1708 }
1709
1710 /****************************************************************************
1711  Update an entry in the print tdb that will allow us to send notify
1712  updates only to interested smbd's.
1713 ****************************************************************************/
1714
1715 bool print_notify_deregister_pid(int snum)
1716 {
1717         TDB_DATA data;
1718         struct tdb_print_db *pdb = NULL;
1719         TDB_CONTEXT *tdb = NULL;
1720         const char *printername;
1721         uint32 mypid = (uint32)sys_getpid();
1722         size_t i;
1723         bool ret = False;
1724
1725         /* if ( snum == -1 ), we are deregister a print server handle
1726            which means to deregister on all print queues */
1727
1728         if (snum == -1)
1729         {
1730                 int num_services = lp_numservices();
1731                 int idx;
1732
1733                 for ( idx=0; idx<num_services; idx++ ) {
1734                         if ( lp_snum_ok(idx) && lp_print_ok(idx) )
1735                                 print_notify_deregister_pid(idx);
1736                 }
1737
1738                 return True;
1739         }
1740         else /* deregister a specific printer */
1741         {
1742                 printername = lp_const_servicename(snum);
1743                 pdb = get_print_db_byname(printername);
1744                 if (!pdb)
1745                         return False;
1746                 tdb = pdb->tdb;
1747         }
1748
1749         if (tdb_lock_bystring_with_timeout(tdb, NOTIFY_PID_LIST_KEY, 10) == -1) {
1750                 DEBUG(0,("print_notify_register_pid: Failed to lock \
1751 printer %s database\n", printername));
1752                 if (pdb)
1753                         release_print_db(pdb);
1754                 return False;
1755         }
1756
1757         data = get_printer_notify_pid_list( tdb, printername, True );
1758
1759         /* Reduce refcount. Remove ourselves if zero. */
1760
1761         for (i = 0; i < data.dsize; ) {
1762                 if (IVAL(data.dptr,i) == mypid) {
1763                         uint32 refcount = IVAL(data.dptr, i+4);
1764
1765                         refcount--;
1766
1767                         if (refcount == 0) {
1768                                 if (data.dsize - i > 8)
1769                                         memmove( &data.dptr[i], &data.dptr[i+8], data.dsize - i - 8);
1770                                 data.dsize -= 8;
1771                                 continue;
1772                         }
1773                         SIVAL(data.dptr, i+4, refcount);
1774                 }
1775
1776                 i += 8;
1777         }
1778
1779         if (data.dsize == 0)
1780                 SAFE_FREE(data.dptr);
1781
1782         /* Store back the record. */
1783         if (tdb_store_bystring(tdb, NOTIFY_PID_LIST_KEY, data, TDB_REPLACE) == -1) {
1784                 DEBUG(0,("print_notify_register_pid: Failed to update pid \
1785 list for printer %s\n", printername));
1786                 goto done;
1787         }
1788
1789         ret = True;
1790
1791   done:
1792
1793         tdb_unlock_bystring(tdb, NOTIFY_PID_LIST_KEY);
1794         if (pdb)
1795                 release_print_db(pdb);
1796         SAFE_FREE(data.dptr);
1797         return ret;
1798 }
1799
1800 /****************************************************************************
1801  Check if a jobid is valid. It is valid if it exists in the database.
1802 ****************************************************************************/
1803
1804 bool print_job_exists(const char* sharename, uint32 jobid)
1805 {
1806         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1807         bool ret;
1808         uint32_t tmp;
1809
1810         if (!pdb)
1811                 return False;
1812         ret = tdb_exists(pdb->tdb, print_key(jobid, &tmp));
1813         release_print_db(pdb);
1814         return ret;
1815 }
1816
1817 /****************************************************************************
1818  Give the fd used for a jobid.
1819 ****************************************************************************/
1820
1821 int print_job_fd(const char* sharename, uint32 jobid)
1822 {
1823         struct printjob *pjob = print_job_find(sharename, jobid);
1824         if (!pjob)
1825                 return -1;
1826         /* don't allow another process to get this info - it is meaningless */
1827         if (pjob->pid != sys_getpid())
1828                 return -1;
1829         return pjob->fd;
1830 }
1831
1832 /****************************************************************************
1833  Give the filename used for a jobid.
1834  Only valid for the process doing the spooling and when the job
1835  has not been spooled.
1836 ****************************************************************************/
1837
1838 char *print_job_fname(const char* sharename, uint32 jobid)
1839 {
1840         struct printjob *pjob = print_job_find(sharename, jobid);
1841         if (!pjob || pjob->spooled || pjob->pid != sys_getpid())
1842                 return NULL;
1843         return pjob->filename;
1844 }
1845
1846
1847 /****************************************************************************
1848  Give the filename used for a jobid.
1849  Only valid for the process doing the spooling and when the job
1850  has not been spooled.
1851 ****************************************************************************/
1852
1853 struct spoolss_DeviceMode *print_job_devmode(const char* sharename, uint32 jobid)
1854 {
1855         struct printjob *pjob = print_job_find(sharename, jobid);
1856
1857         if ( !pjob )
1858                 return NULL;
1859
1860         return pjob->devmode;
1861 }
1862
1863 /****************************************************************************
1864  Set the name of a job. Only possible for owner.
1865 ****************************************************************************/
1866
1867 bool print_job_set_name(const char *sharename, uint32 jobid, const char *name)
1868 {
1869         struct printjob *pjob;
1870
1871         pjob = print_job_find(sharename, jobid);
1872         if (!pjob || pjob->pid != sys_getpid())
1873                 return False;
1874
1875         fstrcpy(pjob->jobname, name);
1876         return pjob_store(sharename, jobid, pjob);
1877 }
1878
1879 /****************************************************************************
1880  Get the name of a job. Only possible for owner.
1881 ****************************************************************************/
1882
1883 bool print_job_get_name(TALLOC_CTX *mem_ctx, const char *sharename, uint32_t jobid, char **name)
1884 {
1885         struct printjob *pjob;
1886
1887         pjob = print_job_find(sharename, jobid);
1888         if (!pjob || pjob->pid != sys_getpid()) {
1889                 return false;
1890         }
1891
1892         *name = talloc_strdup(mem_ctx, pjob->jobname);
1893         if (!*name) {
1894                 return false;
1895         }
1896
1897         return true;
1898 }
1899
1900
1901 /***************************************************************************
1902  Remove a jobid from the 'jobs changed' list.
1903 ***************************************************************************/
1904
1905 static bool remove_from_jobs_changed(const char* sharename, uint32 jobid)
1906 {
1907         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1908         TDB_DATA data, key;
1909         size_t job_count, i;
1910         bool ret = False;
1911         bool gotlock = False;
1912
1913         if (!pdb) {
1914                 return False;
1915         }
1916
1917         ZERO_STRUCT(data);
1918
1919         key = string_tdb_data("INFO/jobs_changed");
1920
1921         if (tdb_chainlock_with_timeout(pdb->tdb, key, 5) == -1)
1922                 goto out;
1923
1924         gotlock = True;
1925
1926         data = tdb_fetch(pdb->tdb, key);
1927
1928         if (data.dptr == NULL || data.dsize == 0 || (data.dsize % 4 != 0))
1929                 goto out;
1930
1931         job_count = data.dsize / 4;
1932         for (i = 0; i < job_count; i++) {
1933                 uint32 ch_jobid;
1934
1935                 ch_jobid = IVAL(data.dptr, i*4);
1936                 if (ch_jobid == jobid) {
1937                         if (i < job_count -1 )
1938                                 memmove(data.dptr + (i*4), data.dptr + (i*4) + 4, (job_count - i - 1)*4 );
1939                         data.dsize -= 4;
1940                         if (tdb_store(pdb->tdb, key, data, TDB_REPLACE) == -1)
1941                                 goto out;
1942                         break;
1943                 }
1944         }
1945
1946         ret = True;
1947   out:
1948
1949         if (gotlock)
1950                 tdb_chainunlock(pdb->tdb, key);
1951         SAFE_FREE(data.dptr);
1952         release_print_db(pdb);
1953         if (ret)
1954                 DEBUG(10,("remove_from_jobs_changed: removed jobid %u\n", (unsigned int)jobid ));
1955         else
1956                 DEBUG(10,("remove_from_jobs_changed: Failed to remove jobid %u\n", (unsigned int)jobid ));
1957         return ret;
1958 }
1959
1960 /****************************************************************************
1961  Delete a print job - don't update queue.
1962 ****************************************************************************/
1963
1964 static bool print_job_delete1(int snum, uint32 jobid)
1965 {
1966         const char* sharename = lp_const_servicename(snum);
1967         struct printjob *pjob = print_job_find(sharename, jobid);
1968         int result = 0;
1969         struct printif *current_printif = get_printer_fns( snum );
1970
1971         if (!pjob)
1972                 return False;
1973
1974         /*
1975          * If already deleting just return.
1976          */
1977
1978         if (pjob->status == LPQ_DELETING)
1979                 return True;
1980
1981         /* Hrm - we need to be able to cope with deleting a job before it
1982            has reached the spooler.  Just mark it as LPQ_DELETING and
1983            let the print_queue_update() code rmeove the record */
1984
1985
1986         if (pjob->sysjob == -1) {
1987                 DEBUG(5, ("attempt to delete job %u not seen by lpr\n", (unsigned int)jobid));
1988         }
1989
1990         /* Set the tdb entry to be deleting. */
1991
1992         pjob->status = LPQ_DELETING;
1993         pjob_store(sharename, jobid, pjob);
1994
1995         if (pjob->spooled && pjob->sysjob != -1)
1996         {
1997                 result = (*(current_printif->job_delete))(
1998                         lp_printername(snum),
1999                         lp_lprmcommand(snum),
2000                         pjob);
2001
2002                 /* Delete the tdb entry if the delete succeeded or the job hasn't
2003                    been spooled. */
2004
2005                 if (result == 0) {
2006                         struct tdb_print_db *pdb = get_print_db_byname(sharename);
2007                         int njobs = 1;
2008
2009                         if (!pdb)
2010                                 return False;
2011                         pjob_delete(sharename, jobid);
2012                         /* Ensure we keep a rough count of the number of total jobs... */
2013                         tdb_change_int32_atomic(pdb->tdb, "INFO/total_jobs", &njobs, -1);
2014                         release_print_db(pdb);
2015                 }
2016         }
2017
2018         remove_from_jobs_changed( sharename, jobid );
2019
2020         return (result == 0);
2021 }
2022
2023 /****************************************************************************
2024  Return true if the current user owns the print job.
2025 ****************************************************************************/
2026
2027 static bool is_owner(struct auth_serversupplied_info *server_info,
2028                      const char *servicename,
2029                      uint32 jobid)
2030 {
2031         struct printjob *pjob = print_job_find(servicename, jobid);
2032
2033         if (!pjob || !server_info)
2034                 return False;
2035
2036         return strequal(pjob->user, server_info->sanitized_username);
2037 }
2038
2039 /****************************************************************************
2040  Delete a print job.
2041 ****************************************************************************/
2042
2043 bool print_job_delete(struct auth_serversupplied_info *server_info, int snum,
2044                       uint32 jobid, WERROR *errcode)
2045 {
2046         const char* sharename = lp_const_servicename( snum );
2047         struct printjob *pjob;
2048         bool    owner;
2049         char    *fname;
2050
2051         *errcode = WERR_OK;
2052
2053         owner = is_owner(server_info, lp_const_servicename(snum), jobid);
2054
2055         /* Check access against security descriptor or whether the user
2056            owns their job. */
2057
2058         if (!owner &&
2059             !print_access_check(server_info, snum, JOB_ACCESS_ADMINISTER)) {
2060                 DEBUG(3, ("delete denied by security descriptor\n"));
2061                 *errcode = WERR_ACCESS_DENIED;
2062
2063                 /* BEGIN_ADMIN_LOG */
2064                 sys_adminlog( LOG_ERR,
2065                               "Permission denied-- user not allowed to delete, \
2066 pause, or resume print job. User name: %s. Printer name: %s.",
2067                               uidtoname(server_info->utok.uid),
2068                               lp_printername(snum) );
2069                 /* END_ADMIN_LOG */
2070
2071                 return False;
2072         }
2073
2074         /*
2075          * get the spooled filename of the print job
2076          * if this works, then the file has not been spooled
2077          * to the underlying print system.  Just delete the
2078          * spool file & return.
2079          */
2080
2081         if ( (fname = print_job_fname( sharename, jobid )) != NULL )
2082         {
2083                 /* remove the spool file */
2084                 DEBUG(10,("print_job_delete: Removing spool file [%s]\n", fname ));
2085                 if ( unlink( fname ) == -1 ) {
2086                         *errcode = map_werror_from_unix(errno);
2087                         return False;
2088                 }
2089         }
2090
2091         if (!print_job_delete1(snum, jobid)) {
2092                 *errcode = WERR_ACCESS_DENIED;
2093                 return False;
2094         }
2095
2096         /* force update the database and say the delete failed if the
2097            job still exists */
2098
2099         print_queue_update(snum, True);
2100
2101         pjob = print_job_find(sharename, jobid);
2102         if ( pjob && (pjob->status != LPQ_DELETING) )
2103                 *errcode = WERR_ACCESS_DENIED;
2104
2105         return (pjob == NULL );
2106 }
2107
2108 /****************************************************************************
2109  Pause a job.
2110 ****************************************************************************/
2111
2112 bool print_job_pause(struct auth_serversupplied_info *server_info, int snum,
2113                      uint32 jobid, WERROR *errcode)
2114 {
2115         const char* sharename = lp_const_servicename(snum);
2116         struct printjob *pjob;
2117         int ret = -1;
2118         struct printif *current_printif = get_printer_fns( snum );
2119
2120         pjob = print_job_find(sharename, jobid);
2121
2122         if (!pjob || !server_info) {
2123                 DEBUG(10, ("print_job_pause: no pjob or user for jobid %u\n",
2124                         (unsigned int)jobid ));
2125                 return False;
2126         }
2127
2128         if (!pjob->spooled || pjob->sysjob == -1) {
2129                 DEBUG(10, ("print_job_pause: not spooled or bad sysjob = %d for jobid %u\n",
2130                         (int)pjob->sysjob, (unsigned int)jobid ));
2131                 return False;
2132         }
2133
2134         if (!is_owner(server_info, lp_const_servicename(snum), jobid) &&
2135             !print_access_check(server_info, snum, JOB_ACCESS_ADMINISTER)) {
2136                 DEBUG(3, ("pause denied by security descriptor\n"));
2137
2138                 /* BEGIN_ADMIN_LOG */
2139                 sys_adminlog( LOG_ERR,
2140                         "Permission denied-- user not allowed to delete, \
2141 pause, or resume print job. User name: %s. Printer name: %s.",
2142                               uidtoname(server_info->utok.uid),
2143                               lp_printername(snum) );
2144                 /* END_ADMIN_LOG */
2145
2146                 *errcode = WERR_ACCESS_DENIED;
2147                 return False;
2148         }
2149
2150         /* need to pause the spooled entry */
2151         ret = (*(current_printif->job_pause))(snum, pjob);
2152
2153         if (ret != 0) {
2154                 *errcode = WERR_INVALID_PARAM;
2155                 return False;
2156         }
2157
2158         /* force update the database */
2159         print_cache_flush(lp_const_servicename(snum));
2160
2161         /* Send a printer notify message */
2162
2163         notify_job_status(sharename, jobid, JOB_STATUS_PAUSED);
2164
2165         /* how do we tell if this succeeded? */
2166
2167         return True;
2168 }
2169
2170 /****************************************************************************
2171  Resume a job.
2172 ****************************************************************************/
2173
2174 bool print_job_resume(struct auth_serversupplied_info *server_info, int snum,
2175                       uint32 jobid, WERROR *errcode)
2176 {
2177         const char *sharename = lp_const_servicename(snum);
2178         struct printjob *pjob;
2179         int ret;
2180         struct printif *current_printif = get_printer_fns( snum );
2181
2182         pjob = print_job_find(sharename, jobid);
2183
2184         if (!pjob || !server_info) {
2185                 DEBUG(10, ("print_job_resume: no pjob or user for jobid %u\n",
2186                         (unsigned int)jobid ));
2187                 return False;
2188         }
2189
2190         if (!pjob->spooled || pjob->sysjob == -1) {
2191                 DEBUG(10, ("print_job_resume: not spooled or bad sysjob = %d for jobid %u\n",
2192                         (int)pjob->sysjob, (unsigned int)jobid ));
2193                 return False;
2194         }
2195
2196         if (!is_owner(server_info, lp_const_servicename(snum), jobid) &&
2197             !print_access_check(server_info, snum, JOB_ACCESS_ADMINISTER)) {
2198                 DEBUG(3, ("resume denied by security descriptor\n"));
2199                 *errcode = WERR_ACCESS_DENIED;
2200
2201                 /* BEGIN_ADMIN_LOG */
2202                 sys_adminlog( LOG_ERR,
2203                          "Permission denied-- user not allowed to delete, \
2204 pause, or resume print job. User name: %s. Printer name: %s.",
2205                               uidtoname(server_info->utok.uid),
2206                               lp_printername(snum) );
2207                 /* END_ADMIN_LOG */
2208                 return False;
2209         }
2210
2211         ret = (*(current_printif->job_resume))(snum, pjob);
2212
2213         if (ret != 0) {
2214                 *errcode = WERR_INVALID_PARAM;
2215                 return False;
2216         }
2217
2218         /* force update the database */
2219         print_cache_flush(lp_const_servicename(snum));
2220
2221         /* Send a printer notify message */
2222
2223         notify_job_status(sharename, jobid, JOB_STATUS_QUEUED);
2224
2225         return True;
2226 }
2227
2228 /****************************************************************************
2229  Write to a print file.
2230 ****************************************************************************/
2231
2232 ssize_t print_job_write(int snum, uint32 jobid, const char *buf, SMB_OFF_T pos, size_t size)
2233 {
2234         const char* sharename = lp_const_servicename(snum);
2235         ssize_t return_code;
2236         struct printjob *pjob;
2237
2238         pjob = print_job_find(sharename, jobid);
2239
2240         if (!pjob)
2241                 return -1;
2242         /* don't allow another process to get this info - it is meaningless */
2243         if (pjob->pid != sys_getpid())
2244                 return -1;
2245
2246         return_code = write_data_at_offset(pjob->fd, buf, size, pos);
2247
2248         if (return_code>0) {
2249                 pjob->size += size;
2250                 pjob_store(sharename, jobid, pjob);
2251         }
2252         return return_code;
2253 }
2254
2255 /****************************************************************************
2256  Get the queue status - do not update if db is out of date.
2257 ****************************************************************************/
2258
2259 static int get_queue_status(const char* sharename, print_status_struct *status)
2260 {
2261         fstring keystr;
2262         TDB_DATA data;
2263         struct tdb_print_db *pdb = get_print_db_byname(sharename);
2264         int len;
2265
2266         if (status) {
2267                 ZERO_STRUCTP(status);
2268         }
2269
2270         if (!pdb)
2271                 return 0;
2272
2273         if (status) {
2274                 fstr_sprintf(keystr, "STATUS/%s", sharename);
2275                 data = tdb_fetch(pdb->tdb, string_tdb_data(keystr));
2276                 if (data.dptr) {
2277                         if (data.dsize == sizeof(print_status_struct))
2278                                 /* this memcpy is ok since the status struct was
2279                                    not packed before storing it in the tdb */
2280                                 memcpy(status, data.dptr, sizeof(print_status_struct));
2281                         SAFE_FREE(data.dptr);
2282                 }
2283         }
2284         len = tdb_fetch_int32(pdb->tdb, "INFO/total_jobs");
2285         release_print_db(pdb);
2286         return (len == -1 ? 0 : len);
2287 }
2288
2289 /****************************************************************************
2290  Determine the number of jobs in a queue.
2291 ****************************************************************************/
2292
2293 int print_queue_length(int snum, print_status_struct *pstatus)
2294 {
2295         const char* sharename = lp_const_servicename( snum );
2296         print_status_struct status;
2297         int len;
2298
2299         ZERO_STRUCT( status );
2300
2301         /* make sure the database is up to date */
2302         if (print_cache_expired(lp_const_servicename(snum), True))
2303                 print_queue_update(snum, False);
2304
2305         /* also fetch the queue status */
2306         memset(&status, 0, sizeof(status));
2307         len = get_queue_status(sharename, &status);
2308
2309         if (pstatus)
2310                 *pstatus = status;
2311
2312         return len;
2313 }
2314
2315 /***************************************************************************
2316  Allocate a jobid. Hold the lock for as short a time as possible.
2317 ***************************************************************************/
2318
2319 static bool allocate_print_jobid(struct tdb_print_db *pdb, int snum, const char *sharename, uint32 *pjobid)
2320 {
2321         int i;
2322         uint32 jobid;
2323
2324         *pjobid = (uint32)-1;
2325
2326         for (i = 0; i < 3; i++) {
2327                 /* Lock the database - only wait 20 seconds. */
2328                 if (tdb_lock_bystring_with_timeout(pdb->tdb, "INFO/nextjob", 20) == -1) {
2329                         DEBUG(0,("allocate_print_jobid: failed to lock printing database %s\n", sharename));
2330                         return False;
2331                 }
2332
2333                 if (!tdb_fetch_uint32(pdb->tdb, "INFO/nextjob", &jobid)) {
2334                         if (tdb_error(pdb->tdb) != TDB_ERR_NOEXIST) {
2335                                 DEBUG(0, ("allocate_print_jobid: failed to fetch INFO/nextjob for print queue %s\n",
2336                                         sharename));
2337                                 tdb_unlock_bystring(pdb->tdb, "INFO/nextjob");
2338                                 return False;
2339                         }
2340                         DEBUG(10,("allocate_print_jobid: no existing jobid in %s\n", sharename));
2341                         jobid = 0;
2342                 }
2343
2344                 DEBUG(10,("allocate_print_jobid: read jobid %u from %s\n", jobid, sharename));
2345
2346                 jobid = NEXT_JOBID(jobid);
2347
2348                 if (tdb_store_int32(pdb->tdb, "INFO/nextjob", jobid)==-1) {
2349                         DEBUG(3, ("allocate_print_jobid: failed to store INFO/nextjob.\n"));
2350                         tdb_unlock_bystring(pdb->tdb, "INFO/nextjob");
2351                         return False;
2352                 }
2353
2354                 /* We've finished with the INFO/nextjob lock. */
2355                 tdb_unlock_bystring(pdb->tdb, "INFO/nextjob");
2356
2357                 if (!print_job_exists(sharename, jobid)) {
2358                         break;
2359                 }
2360                 DEBUG(10,("allocate_print_jobid: found jobid %u in %s\n", jobid, sharename));
2361         }
2362
2363         if (i > 2) {
2364                 DEBUG(0, ("allocate_print_jobid: failed to allocate a print job for queue %s\n",
2365                         sharename));
2366                 /* Probably full... */
2367                 errno = ENOSPC;
2368                 return False;
2369         }
2370
2371         /* Store a dummy placeholder. */
2372         {
2373                 uint32_t tmp;
2374                 TDB_DATA dum;
2375                 dum.dptr = NULL;
2376                 dum.dsize = 0;
2377                 if (tdb_store(pdb->tdb, print_key(jobid, &tmp), dum,
2378                               TDB_INSERT) == -1) {
2379                         DEBUG(3, ("allocate_print_jobid: jobid (%d) failed to store placeholder.\n",
2380                                 jobid ));
2381                         return False;
2382                 }
2383         }
2384
2385         *pjobid = jobid;
2386         return True;
2387 }
2388
2389 /***************************************************************************
2390  Append a jobid to the 'jobs changed' list.
2391 ***************************************************************************/
2392
2393 static bool add_to_jobs_changed(struct tdb_print_db *pdb, uint32 jobid)
2394 {
2395         TDB_DATA data;
2396         uint32 store_jobid;
2397
2398         SIVAL(&store_jobid, 0, jobid);
2399         data.dptr = (uint8 *)&store_jobid;
2400         data.dsize = 4;
2401
2402         DEBUG(10,("add_to_jobs_changed: Added jobid %u\n", (unsigned int)jobid ));
2403
2404         return (tdb_append(pdb->tdb, string_tdb_data("INFO/jobs_changed"),
2405                            data) == 0);
2406 }
2407
2408 /***************************************************************************
2409  Start spooling a job - return the jobid.
2410 ***************************************************************************/
2411
2412 uint32 print_job_start(struct auth_serversupplied_info *server_info, int snum,
2413                        const char *jobname, struct spoolss_DeviceMode *devmode )
2414 {
2415         uint32 jobid;
2416         char *path;
2417         struct printjob pjob;
2418         const char *sharename = lp_const_servicename(snum);
2419         struct tdb_print_db *pdb = get_print_db_byname(sharename);
2420         int njobs;
2421
2422         errno = 0;
2423
2424         if (!pdb)
2425                 return (uint32)-1;
2426
2427         if (!print_access_check(server_info, snum, PRINTER_ACCESS_USE)) {
2428                 DEBUG(3, ("print_job_start: job start denied by security descriptor\n"));
2429                 release_print_db(pdb);
2430                 return (uint32)-1;
2431         }
2432
2433         if (!print_time_access_check(server_info, lp_servicename(snum))) {
2434                 DEBUG(3, ("print_job_start: job start denied by time check\n"));
2435                 release_print_db(pdb);
2436                 return (uint32)-1;
2437         }
2438
2439         path = lp_pathname(snum);
2440
2441         /* see if we have sufficient disk space */
2442         if (lp_minprintspace(snum)) {
2443                 uint64_t dspace, dsize;
2444                 if (sys_fsusage(path, &dspace, &dsize) == 0 &&
2445                     dspace < 2*(uint64_t)lp_minprintspace(snum)) {
2446                         DEBUG(3, ("print_job_start: disk space check failed.\n"));
2447                         release_print_db(pdb);
2448                         errno = ENOSPC;
2449                         return (uint32)-1;
2450                 }
2451         }
2452
2453         /* for autoloaded printers, check that the printcap entry still exists */
2454         if (lp_autoloaded(snum) && !pcap_printername_ok(lp_const_servicename(snum))) {
2455                 DEBUG(3, ("print_job_start: printer name %s check failed.\n", lp_const_servicename(snum) ));
2456                 release_print_db(pdb);
2457                 errno = ENOENT;
2458                 return (uint32)-1;
2459         }
2460
2461         /* Insure the maximum queue size is not violated */
2462         if ((njobs = print_queue_length(snum,NULL)) > lp_maxprintjobs(snum)) {
2463                 DEBUG(3, ("print_job_start: Queue %s number of jobs (%d) larger than max printjobs per queue (%d).\n",
2464                         sharename, njobs, lp_maxprintjobs(snum) ));
2465                 release_print_db(pdb);
2466                 errno = ENOSPC;
2467                 return (uint32)-1;
2468         }
2469
2470         DEBUG(10,("print_job_start: Queue %s number of jobs (%d), max printjobs = %d\n",
2471                 sharename, njobs, lp_maxprintjobs(snum) ));
2472
2473         if (!allocate_print_jobid(pdb, snum, sharename, &jobid))
2474                 goto fail;
2475
2476         /* create the database entry */
2477
2478         ZERO_STRUCT(pjob);
2479
2480         pjob.pid = sys_getpid();
2481         pjob.sysjob = -1;
2482         pjob.fd = -1;
2483         pjob.starttime = time(NULL);
2484         pjob.status = LPQ_SPOOLING;
2485         pjob.size = 0;
2486         pjob.spooled = False;
2487         pjob.smbjob = True;
2488         pjob.devmode = devmode;
2489
2490         fstrcpy(pjob.jobname, jobname);
2491
2492         fstrcpy(pjob.user, lp_printjob_username(snum));
2493         standard_sub_advanced(sharename, server_info->sanitized_username,
2494                               path, server_info->utok.gid,
2495                               server_info->sanitized_username,
2496                               server_info->info3->base.domain.string,
2497                               pjob.user, sizeof(pjob.user)-1);
2498         /* ensure NULL termination */
2499         pjob.user[sizeof(pjob.user)-1] = '\0';
2500
2501         fstrcpy(pjob.queuename, lp_const_servicename(snum));
2502
2503         /* we have a job entry - now create the spool file */
2504         slprintf(pjob.filename, sizeof(pjob.filename)-1, "%s/%s%.8u.XXXXXX",
2505                  path, PRINT_SPOOL_PREFIX, (unsigned int)jobid);
2506         pjob.fd = mkstemp(pjob.filename);
2507
2508         if (pjob.fd == -1) {
2509                 if (errno == EACCES) {
2510                         /* Common setup error, force a report. */
2511                         DEBUG(0, ("print_job_start: insufficient permissions \
2512 to open spool file %s.\n", pjob.filename));
2513                 } else {
2514                         /* Normal case, report at level 3 and above. */
2515                         DEBUG(3, ("print_job_start: can't open spool file %s,\n", pjob.filename));
2516                         DEBUGADD(3, ("errno = %d (%s).\n", errno, strerror(errno)));
2517                 }
2518                 goto fail;
2519         }
2520
2521         pjob_store(sharename, jobid, &pjob);
2522
2523         /* Update the 'jobs changed' entry used by print_queue_status. */
2524         add_to_jobs_changed(pdb, jobid);
2525
2526         /* Ensure we keep a rough count of the number of total jobs... */
2527         tdb_change_int32_atomic(pdb->tdb, "INFO/total_jobs", &njobs, 1);
2528
2529         release_print_db(pdb);
2530
2531         return jobid;
2532
2533  fail:
2534         if (jobid != -1)
2535                 pjob_delete(sharename, jobid);
2536
2537         release_print_db(pdb);
2538
2539         DEBUG(3, ("print_job_start: returning fail. Error = %s\n", strerror(errno) ));
2540         return (uint32)-1;
2541 }
2542
2543 /****************************************************************************
2544  Update the number of pages spooled to jobid
2545 ****************************************************************************/
2546
2547 void print_job_endpage(int snum, uint32 jobid)
2548 {
2549         const char* sharename = lp_const_servicename(snum);
2550         struct printjob *pjob;
2551
2552         pjob = print_job_find(sharename, jobid);
2553         if (!pjob)
2554                 return;
2555         /* don't allow another process to get this info - it is meaningless */
2556         if (pjob->pid != sys_getpid())
2557                 return;
2558
2559         pjob->page_count++;
2560         pjob_store(sharename, jobid, pjob);
2561 }
2562
2563 /****************************************************************************
2564  Print a file - called on closing the file. This spools the job.
2565  If normal close is false then we're tearing down the jobs - treat as an
2566  error.
2567 ****************************************************************************/
2568
2569 bool print_job_end(int snum, uint32 jobid, enum file_close_type close_type)
2570 {
2571         const char* sharename = lp_const_servicename(snum);
2572         struct printjob *pjob;
2573         int ret;
2574         SMB_STRUCT_STAT sbuf;
2575         struct printif *current_printif = get_printer_fns( snum );
2576
2577         pjob = print_job_find(sharename, jobid);
2578
2579         if (!pjob)
2580                 return False;
2581
2582         if (pjob->spooled || pjob->pid != sys_getpid())
2583                 return False;
2584
2585         if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
2586             (sys_fstat(pjob->fd, &sbuf, false) == 0)) {
2587                 pjob->size = sbuf.st_ex_size;
2588                 close(pjob->fd);
2589                 pjob->fd = -1;
2590         } else {
2591
2592                 /*
2593                  * Not a normal close or we couldn't stat the job file,
2594                  * so something has gone wrong. Cleanup.
2595                  */
2596                 close(pjob->fd);
2597                 pjob->fd = -1;
2598                 DEBUG(3,("print_job_end: failed to stat file for jobid %d\n", jobid ));
2599                 goto fail;
2600         }
2601
2602         /* Technically, this is not quite right. If the printer has a separator
2603          * page turned on, the NT spooler prints the separator page even if the
2604          * print job is 0 bytes. 010215 JRR */
2605         if (pjob->size == 0 || pjob->status == LPQ_DELETING) {
2606                 /* don't bother spooling empty files or something being deleted. */
2607                 DEBUG(5,("print_job_end: canceling spool of %s (%s)\n",
2608                         pjob->filename, pjob->size ? "deleted" : "zero length" ));
2609                 unlink(pjob->filename);
2610                 pjob_delete(sharename, jobid);
2611                 return True;
2612         }
2613
2614         ret = (*(current_printif->job_submit))(snum, pjob);
2615
2616         if (ret)
2617                 goto fail;
2618
2619         /* The print job has been successfully handed over to the back-end */
2620
2621         pjob->spooled = True;
2622         pjob->status = LPQ_QUEUED;
2623         pjob_store(sharename, jobid, pjob);
2624
2625         /* make sure the database is up to date */
2626         if (print_cache_expired(lp_const_servicename(snum), True))
2627                 print_queue_update(snum, False);
2628
2629         return True;
2630
2631 fail:
2632
2633         /* The print job was not successfully started. Cleanup */
2634         /* Still need to add proper error return propagation! 010122:JRR */
2635         unlink(pjob->filename);
2636         pjob_delete(sharename, jobid);
2637         return False;
2638 }
2639
2640 /****************************************************************************
2641  Get a snapshot of jobs in the system without traversing.
2642 ****************************************************************************/
2643
2644 static bool get_stored_queue_info(struct tdb_print_db *pdb, int snum, int *pcount, print_queue_struct **ppqueue)
2645 {
2646         TDB_DATA data, cgdata;
2647         print_queue_struct *queue = NULL;
2648         uint32 qcount = 0;
2649         uint32 extra_count = 0;
2650         int total_count = 0;
2651         size_t len = 0;
2652         uint32 i;
2653         int max_reported_jobs = lp_max_reported_jobs(snum);
2654         bool ret = False;
2655         const char* sharename = lp_servicename(snum);
2656
2657         /* make sure the database is up to date */
2658         if (print_cache_expired(lp_const_servicename(snum), True))
2659                 print_queue_update(snum, False);
2660
2661         *pcount = 0;
2662         *ppqueue = NULL;
2663
2664         ZERO_STRUCT(data);
2665         ZERO_STRUCT(cgdata);
2666
2667         /* Get the stored queue data. */
2668         data = tdb_fetch(pdb->tdb, string_tdb_data("INFO/linear_queue_array"));
2669
2670         if (data.dptr && data.dsize >= sizeof(qcount))
2671                 len += tdb_unpack(data.dptr + len, data.dsize - len, "d", &qcount);
2672
2673         /* Get the changed jobs list. */
2674         cgdata = tdb_fetch(pdb->tdb, string_tdb_data("INFO/jobs_changed"));
2675         if (cgdata.dptr != NULL && (cgdata.dsize % 4 == 0))
2676                 extra_count = cgdata.dsize/4;
2677
2678         DEBUG(5,("get_stored_queue_info: qcount = %u, extra_count = %u\n", (unsigned int)qcount, (unsigned int)extra_count));
2679
2680         /* Allocate the queue size. */
2681         if (qcount == 0 && extra_count == 0)
2682                 goto out;
2683
2684         if ((queue = SMB_MALLOC_ARRAY(print_queue_struct, qcount + extra_count)) == NULL)
2685                 goto out;
2686
2687         /* Retrieve the linearised queue data. */
2688
2689         for( i  = 0; i < qcount; i++) {
2690                 uint32 qjob, qsize, qpage_count, qstatus, qpriority, qtime;
2691                 len += tdb_unpack(data.dptr + len, data.dsize - len, "ddddddff",
2692                                 &qjob,
2693                                 &qsize,
2694                                 &qpage_count,
2695                                 &qstatus,
2696                                 &qpriority,
2697                                 &qtime,
2698                                 queue[i].fs_user,
2699                                 queue[i].fs_file);
2700                 queue[i].job = qjob;
2701                 queue[i].size = qsize;
2702                 queue[i].page_count = qpage_count;
2703                 queue[i].status = qstatus;
2704                 queue[i].priority = qpriority;
2705                 queue[i].time = qtime;
2706         }
2707
2708         total_count = qcount;
2709
2710         /* Add in the changed jobids. */
2711         for( i  = 0; i < extra_count; i++) {
2712                 uint32 jobid;
2713                 struct printjob *pjob;
2714
2715                 jobid = IVAL(cgdata.dptr, i*4);
2716                 DEBUG(5,("get_stored_queue_info: changed job = %u\n", (unsigned int)jobid));
2717                 pjob = print_job_find(lp_const_servicename(snum), jobid);
2718                 if (!pjob) {
2719                         DEBUG(5,("get_stored_queue_info: failed to find changed job = %u\n", (unsigned int)jobid));
2720                         remove_from_jobs_changed(sharename, jobid);
2721                         continue;
2722                 }
2723
2724                 queue[total_count].job = jobid;
2725                 queue[total_count].size = pjob->size;
2726                 queue[total_count].page_count = pjob->page_count;
2727                 queue[total_count].status = pjob->status;
2728                 queue[total_count].priority = 1;
2729                 queue[total_count].time = pjob->starttime;
2730                 fstrcpy(queue[total_count].fs_user, pjob->user);
2731                 fstrcpy(queue[total_count].fs_file, pjob->jobname);
2732                 total_count++;
2733         }
2734
2735         /* Sort the queue by submission time otherwise they are displayed
2736            in hash order. */
2737
2738         TYPESAFE_QSORT(queue, total_count, printjob_comp);
2739
2740         DEBUG(5,("get_stored_queue_info: total_count = %u\n", (unsigned int)total_count));
2741
2742         if (max_reported_jobs && total_count > max_reported_jobs)
2743                 total_count = max_reported_jobs;
2744
2745         *ppqueue = queue;
2746         *pcount = total_count;
2747
2748         ret = True;
2749
2750   out:
2751
2752         SAFE_FREE(data.dptr);
2753         SAFE_FREE(cgdata.dptr);
2754         return ret;
2755 }
2756
2757 /****************************************************************************
2758  Get a printer queue listing.
2759  set queue = NULL and status = NULL if you just want to update the cache
2760 ****************************************************************************/
2761
2762 int print_queue_status(int snum,
2763                        print_queue_struct **ppqueue,
2764                        print_status_struct *status)
2765 {
2766         fstring keystr;
2767         TDB_DATA data, key;
2768         const char *sharename;
2769         struct tdb_print_db *pdb;
2770         int count = 0;
2771
2772         /* make sure the database is up to date */
2773
2774         if (print_cache_expired(lp_const_servicename(snum), True))
2775                 print_queue_update(snum, False);
2776
2777         /* return if we are done */
2778         if ( !ppqueue || !status )
2779                 return 0;
2780
2781         *ppqueue = NULL;
2782         sharename = lp_const_servicename(snum);
2783         pdb = get_print_db_byname(sharename);
2784
2785         if (!pdb)
2786                 return 0;
2787
2788         /*
2789          * Fetch the queue status.  We must do this first, as there may
2790          * be no jobs in the queue.
2791          */
2792
2793         ZERO_STRUCTP(status);
2794         slprintf(keystr, sizeof(keystr)-1, "STATUS/%s", sharename);
2795         key = string_tdb_data(keystr);
2796
2797         data = tdb_fetch(pdb->tdb, key);
2798         if (data.dptr) {
2799                 if (data.dsize == sizeof(*status)) {
2800                         /* this memcpy is ok since the status struct was
2801                            not packed before storing it in the tdb */
2802                         memcpy(status, data.dptr, sizeof(*status));
2803                 }
2804                 SAFE_FREE(data.dptr);
2805         }
2806
2807         /*
2808          * Now, fetch the print queue information.  We first count the number
2809          * of entries, and then only retrieve the queue if necessary.
2810          */
2811
2812         if (!get_stored_queue_info(pdb, snum, &count, ppqueue)) {
2813                 release_print_db(pdb);
2814                 return 0;
2815         }
2816
2817         release_print_db(pdb);
2818         return count;
2819 }
2820
2821 /****************************************************************************
2822  Pause a queue.
2823 ****************************************************************************/
2824
2825 WERROR print_queue_pause(struct auth_serversupplied_info *server_info, int snum)
2826 {
2827         int ret;
2828         struct printif *current_printif = get_printer_fns( snum );
2829
2830         if (!print_access_check(server_info, snum,
2831                                 PRINTER_ACCESS_ADMINISTER)) {
2832                 return WERR_ACCESS_DENIED;
2833         }
2834
2835
2836         become_root();
2837
2838         ret = (*(current_printif->queue_pause))(snum);
2839
2840         unbecome_root();
2841
2842         if (ret != 0) {
2843                 return WERR_INVALID_PARAM;
2844         }
2845
2846         /* force update the database */
2847         print_cache_flush(lp_const_servicename(snum));
2848
2849         /* Send a printer notify message */
2850
2851         notify_printer_status(snum, PRINTER_STATUS_PAUSED);
2852
2853         return WERR_OK;
2854 }
2855
2856 /****************************************************************************
2857  Resume a queue.
2858 ****************************************************************************/
2859
2860 WERROR print_queue_resume(struct auth_serversupplied_info *server_info, int snum)
2861 {
2862         int ret;
2863         struct printif *current_printif = get_printer_fns( snum );
2864
2865         if (!print_access_check(server_info, snum,
2866                                 PRINTER_ACCESS_ADMINISTER)) {
2867                 return WERR_ACCESS_DENIED;
2868         }
2869
2870         become_root();
2871
2872         ret = (*(current_printif->queue_resume))(snum);
2873
2874         unbecome_root();
2875
2876         if (ret != 0) {
2877                 return WERR_INVALID_PARAM;
2878         }
2879
2880         /* make sure the database is up to date */
2881         if (print_cache_expired(lp_const_servicename(snum), True))
2882                 print_queue_update(snum, True);
2883
2884         /* Send a printer notify message */
2885
2886         notify_printer_status(snum, PRINTER_STATUS_OK);
2887
2888         return WERR_OK;
2889 }
2890
2891 /****************************************************************************
2892  Purge a queue - implemented by deleting all jobs that we can delete.
2893 ****************************************************************************/
2894
2895 WERROR print_queue_purge(struct auth_serversupplied_info *server_info, int snum)
2896 {
2897         print_queue_struct *queue;
2898         print_status_struct status;
2899         int njobs, i;
2900         bool can_job_admin;
2901
2902         /* Force and update so the count is accurate (i.e. not a cached count) */
2903         print_queue_update(snum, True);
2904
2905         can_job_admin = print_access_check(server_info, snum,
2906                                            JOB_ACCESS_ADMINISTER);
2907         njobs = print_queue_status(snum, &queue, &status);
2908
2909         if ( can_job_admin )
2910                 become_root();
2911
2912         for (i=0;i<njobs;i++) {
2913                 bool owner = is_owner(server_info, lp_const_servicename(snum),
2914                                       queue[i].job);
2915
2916                 if (owner || can_job_admin) {
2917                         print_job_delete1(snum, queue[i].job);
2918                 }
2919         }
2920
2921         if ( can_job_admin )
2922                 unbecome_root();
2923
2924         /* update the cache */
2925         print_queue_update( snum, True );
2926
2927         SAFE_FREE(queue);
2928
2929         return WERR_OK;
2930 }