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 "system/syslog.h"
  24 #include "system/filesys.h"
  25 #include "printing.h"
  26 #include "../librpc/gen_ndr/ndr_spoolss.h"
  27 #include "nt_printing.h"
  28 #include "../librpc/gen_ndr/netlogon.h"
  29 #include "printing/notify.h"
  30 #include "printing/pcap.h"
  31 #include "printing/printer_list.h"
  32 #include "printing/queue_process.h"
  33 #include "serverid.h"
  34 #include "smbd/smbd.h"
  35 #include "auth.h"
  36 #include "messages.h"
  37 #include "util_tdb.h"
  38 #include "lib/param/loadparm.h"
  39
  40 extern struct current_user current_user;
  41 extern userdom_struct current_user_info;
  42
  43 /* Current printer interface */
  44 static bool remove_from_jobs_added(const char* sharename, uint32 jobid);
  45
  46 /*
  47    the printing backend revolves around a tdb database that stores the
  48    SMB view of the print queue
  49
  50    The key for this database is a jobid - a internally generated number that
  51    uniquely identifies a print job
  52
  53    reading the print queue involves two steps:
  54      - possibly running lpq and updating the internal database from that
  55      - reading entries from the database
  56
  57    jobids are assigned when a job starts spooling.
  58 */
  59
  60 static TDB_CONTEXT *rap_tdb;
  61 static uint16 next_rap_jobid;
  62 struct rap_jobid_key {
  63         fstring sharename;
  64         uint32  jobid;
  65 };
  66
  67 /***************************************************************************
  68  Nightmare. LANMAN jobid's are 16 bit numbers..... We must map them to 32
  69  bit RPC jobids.... JRA.
  70 ***************************************************************************/
  71
  72 uint16 pjobid_to_rap(const char* sharename, uint32 jobid)
  73 {
  74         uint16 rap_jobid;
  75         TDB_DATA data, key;
  76         struct rap_jobid_key jinfo;
  77         uint8 buf[2];
  78
  79         DEBUG(10,("pjobid_to_rap: called.\n"));
  80
  81         if (!rap_tdb) {
  82                 /* Create the in-memory tdb. */
  83                 rap_tdb = tdb_open_log(NULL, 0, TDB_INTERNAL, (O_RDWR|O_CREAT), 0644);
  84                 if (!rap_tdb)
  85                         return 0;
  86         }
  87
  88         ZERO_STRUCT( jinfo );
  89         fstrcpy( jinfo.sharename, sharename );
  90         jinfo.jobid = jobid;
  91         key.dptr = (uint8 *)&jinfo;
  92         key.dsize = sizeof(jinfo);
  93
  94         data = tdb_fetch_compat(rap_tdb, key);
  95         if (data.dptr && data.dsize == sizeof(uint16)) {
  96                 rap_jobid = SVAL(data.dptr, 0);
  97                 SAFE_FREE(data.dptr);
  98                 DEBUG(10,("pjobid_to_rap: jobid %u maps to RAP jobid %u\n",
  99                         (unsigned int)jobid, (unsigned int)rap_jobid));
 100                 return rap_jobid;
 101         }
 102         SAFE_FREE(data.dptr);
 103         /* Not found - create and store mapping. */
 104         rap_jobid = ++next_rap_jobid;
 105         if (rap_jobid == 0)
 106                 rap_jobid = ++next_rap_jobid;
 107         SSVAL(buf,0,rap_jobid);
 108         data.dptr = buf;
 109         data.dsize = sizeof(rap_jobid);
 110         tdb_store(rap_tdb, key, data, TDB_REPLACE);
 111         tdb_store(rap_tdb, data, key, TDB_REPLACE);
 112
 113         DEBUG(10,("pjobid_to_rap: created jobid %u maps to RAP jobid %u\n",
 114                 (unsigned int)jobid, (unsigned int)rap_jobid));
 115         return rap_jobid;
 116 }
 117
 118 bool rap_to_pjobid(uint16 rap_jobid, fstring sharename, uint32 *pjobid)
 119 {
 120         TDB_DATA data, key;
 121         uint8 buf[2];
 122
 123         DEBUG(10,("rap_to_pjobid called.\n"));
 124
 125         if (!rap_tdb)
 126                 return False;
 127
 128         SSVAL(buf,0,rap_jobid);
 129         key.dptr = buf;
 130         key.dsize = sizeof(rap_jobid);
 131         data = tdb_fetch_compat(rap_tdb, key);
 132         if ( data.dptr && data.dsize == sizeof(struct rap_jobid_key) )
 133         {
 134                 struct rap_jobid_key *jinfo = (struct rap_jobid_key*)data.dptr;
 135                 if (sharename != NULL) {
 136                         fstrcpy( sharename, jinfo->sharename );
 137                 }
 138                 *pjobid = jinfo->jobid;
 139                 DEBUG(10,("rap_to_pjobid: jobid %u maps to RAP jobid %u\n",
 140                         (unsigned int)*pjobid, (unsigned int)rap_jobid));
 141                 SAFE_FREE(data.dptr);
 142                 return True;
 143         }
 144
 145         DEBUG(10,("rap_to_pjobid: Failed to lookup RAP jobid %u\n",
 146                 (unsigned int)rap_jobid));
 147         SAFE_FREE(data.dptr);
 148         return False;
 149 }
 150
 151 void rap_jobid_delete(const char* sharename, uint32 jobid)
 152 {
 153         TDB_DATA key, data;
 154         uint16 rap_jobid;
 155         struct rap_jobid_key jinfo;
 156         uint8 buf[2];
 157
 158         DEBUG(10,("rap_jobid_delete: called.\n"));
 159
 160         if (!rap_tdb)
 161                 return;
 162
 163         ZERO_STRUCT( jinfo );
 164         fstrcpy( jinfo.sharename, sharename );
 165         jinfo.jobid = jobid;
 166         key.dptr = (uint8 *)&jinfo;
 167         key.dsize = sizeof(jinfo);
 168
 169         data = tdb_fetch_compat(rap_tdb, key);
 170         if (!data.dptr || (data.dsize != sizeof(uint16))) {
 171                 DEBUG(10,("rap_jobid_delete: cannot find jobid %u\n",
 172                         (unsigned int)jobid ));
 173                 SAFE_FREE(data.dptr);
 174                 return;
 175         }
 176
 177         DEBUG(10,("rap_jobid_delete: deleting jobid %u\n",
 178                 (unsigned int)jobid ));
 179
 180         rap_jobid = SVAL(data.dptr, 0);
 181         SAFE_FREE(data.dptr);
 182         SSVAL(buf,0,rap_jobid);
 183         data.dptr = buf;
 184         data.dsize = sizeof(rap_jobid);
 185         tdb_delete(rap_tdb, key);
 186         tdb_delete(rap_tdb, data);
 187 }
 188
 189 static int get_queue_status(const char* sharename, print_status_struct *);
 190
 191 /****************************************************************************
 192  Initialise the printing backend. Called once at startup before the fork().
 193 ****************************************************************************/
 194
 195 bool print_backend_init(struct messaging_context *msg_ctx)
 196 {
 197         const char *sversion = "INFO/version";
 198         int services = lp_numservices();
 199         int snum;
 200
 201         if (!printer_list_parent_init()) {
 202                 return false;
 203         }
 204
 205         unlink(cache_path("printing.tdb"));
 206         mkdir(cache_path("printing"),0755);
 207
 208         /* handle a Samba upgrade */
 209
 210         for (snum = 0; snum < services; snum++) {
 211                 struct tdb_print_db *pdb;
 212                 if (!lp_print_ok(snum))
 213                         continue;
 214
 215                 pdb = get_print_db_byname(lp_const_servicename(snum));
 216                 if (!pdb)
 217                         continue;
 218                 if (tdb_lock_bystring(pdb->tdb, sversion) != 0) {
 219                         DEBUG(0,("print_backend_init: Failed to open printer %s database\n", lp_const_servicename(snum) ));
 220                         release_print_db(pdb);
 221                         return False;
 222                 }
 223                 if (tdb_fetch_int32(pdb->tdb, sversion) != PRINT_DATABASE_VERSION) {
 224                         tdb_wipe_all(pdb->tdb);
 225                         tdb_store_int32(pdb->tdb, sversion, PRINT_DATABASE_VERSION);
 226                 }
 227                 tdb_unlock_bystring(pdb->tdb, sversion);
 228                 release_print_db(pdb);
 229         }
 230
 231         close_all_print_db(); /* Don't leave any open. */
 232
 233         /* do NT print initialization... */
 234         return nt_printing_init(msg_ctx);
 235 }
 236
 237 /****************************************************************************
 238  Shut down printing backend. Called once at shutdown to close the tdb.
 239 ****************************************************************************/
 240
 241 void printing_end(void)
 242 {
 243         close_all_print_db(); /* Don't leave any open. */
 244 }
 245
 246 /****************************************************************************
 247  Retrieve the set of printing functions for a given service.  This allows
 248  us to set the printer function table based on the value of the 'printing'
 249  service parameter.
 250
 251  Use the generic interface as the default and only use cups interface only
 252  when asked for (and only when supported)
 253 ****************************************************************************/
 254
 255 static struct printif *get_printer_fns_from_type( enum printing_types type )
 256 {
 257         struct printif *printer_fns = &generic_printif;
 258
 259 #ifdef HAVE_CUPS
 260         if ( type == PRINT_CUPS ) {
 261                 printer_fns = &cups_printif;
 262         }
 263 #endif /* HAVE_CUPS */
 264
 265 #ifdef HAVE_IPRINT
 266         if ( type == PRINT_IPRINT ) {
 267                 printer_fns = &iprint_printif;
 268         }
 269 #endif /* HAVE_IPRINT */
 270
 271         printer_fns->type = type;
 272
 273         return printer_fns;
 274 }
 275
 276 static struct printif *get_printer_fns( int snum )
 277 {
 278         return get_printer_fns_from_type( (enum printing_types)lp_printing(snum) );
 279 }
 280
 281
 282 /****************************************************************************
 283  Useful function to generate a tdb key.
 284 ****************************************************************************/
 285
 286 static TDB_DATA print_key(uint32 jobid, uint32 *tmp)
 287 {
 288         TDB_DATA ret;
 289
 290         SIVAL(tmp, 0, jobid);
 291         ret.dptr = (uint8 *)tmp;
 292         ret.dsize = sizeof(*tmp);
 293         return ret;
 294 }
 295
 296 /****************************************************************************
 297  Pack the devicemode to store it in a tdb.
 298 ****************************************************************************/
 299 static int pack_devicemode(struct spoolss_DeviceMode *devmode, uint8 *buf, int buflen)
 300 {
 301         enum ndr_err_code ndr_err;
 302         DATA_BLOB blob;
 303         int len = 0;
 304
 305         if (devmode) {
 306                 ndr_err = ndr_push_struct_blob(&blob, talloc_tos(),
 307                                                devmode,
 308                                                (ndr_push_flags_fn_t)
 309                                                ndr_push_spoolss_DeviceMode);
 310                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 311                         DEBUG(10, ("pack_devicemode: "
 312                                    "error encoding spoolss_DeviceMode\n"));
 313                         goto done;
 314                 }
 315         } else {
 316                 ZERO_STRUCT(blob);
 317         }
 318
 319         len = tdb_pack(buf, buflen, "B", blob.length, blob.data);
 320
 321         if (devmode) {
 322                 DEBUG(8, ("Packed devicemode [%s]\n", devmode->formname));
 323         }
 324
 325 done:
 326         return len;
 327 }
 328
 329 /****************************************************************************
 330  Unpack the devicemode to store it in a tdb.
 331 ****************************************************************************/
 332 static int unpack_devicemode(TALLOC_CTX *mem_ctx,
 333                       const uint8 *buf, int buflen,
 334                       struct spoolss_DeviceMode **devmode)
 335 {
 336         struct spoolss_DeviceMode *dm;
 337         enum ndr_err_code ndr_err;
 338         char *data = NULL;
 339         int data_len = 0;
 340         DATA_BLOB blob;
 341         int len = 0;
 342
 343         *devmode = NULL;
 344
 345         len = tdb_unpack(buf, buflen, "B", &data_len, &data);
 346         if (!data) {
 347                 return len;
 348         }
 349
 350         dm = talloc_zero(mem_ctx, struct spoolss_DeviceMode);
 351         if (!dm) {
 352                 goto done;
 353         }
 354
 355         blob = data_blob_const(data, data_len);
 356
 357         ndr_err = ndr_pull_struct_blob(&blob, dm, dm,
 358                         (ndr_pull_flags_fn_t)ndr_pull_spoolss_DeviceMode);
 359         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 360                 DEBUG(10, ("unpack_devicemode: "
 361                            "error parsing spoolss_DeviceMode\n"));
 362                 goto done;
 363         }
 364
 365         DEBUG(8, ("Unpacked devicemode [%s](%s)\n",
 366                   dm->devicename, dm->formname));
 367         if (dm->driverextra_data.data) {
 368                 DEBUG(8, ("with a private section of %d bytes\n",
 369                           dm->__driverextra_length));
 370         }
 371
 372         *devmode = dm;
 373
 374 done:
 375         SAFE_FREE(data);
 376         return len;
 377 }
 378
 379 /***********************************************************************
 380  unpack a pjob from a tdb buffer
 381 ***********************************************************************/
 382
 383 static int unpack_pjob(TALLOC_CTX *mem_ctx, uint8 *buf, int buflen,
 384                        struct printjob *pjob)
 385 {
 386         int     len = 0;
 387         int     used;
 388         uint32 pjpid, pjjobid, pjsysjob, pjfd, pjstarttime, pjstatus;
 389         uint32 pjsize, pjpage_count, pjspooled, pjsmbjob;
 390
 391         if (!buf || !pjob) {
 392                 return -1;
 393         }
 394
 395         len += tdb_unpack(buf+len, buflen-len, "ddddddddddfffff",
 396                                 &pjpid,
 397                                 &pjjobid,
 398                                 &pjsysjob,
 399                                 &pjfd,
 400                                 &pjstarttime,
 401                                 &pjstatus,
 402                                 &pjsize,
 403                                 &pjpage_count,
 404                                 &pjspooled,
 405                                 &pjsmbjob,
 406                                 pjob->filename,
 407                                 pjob->jobname,
 408                                 pjob->user,
 409                                 pjob->clientmachine,
 410                                 pjob->queuename);
 411
 412         if (len == -1) {
 413                 return -1;
 414         }
 415
 416         used = unpack_devicemode(mem_ctx, buf+len, buflen-len, &pjob->devmode);
 417         if (used == -1) {
 418                 return -1;
 419         }
 420
 421         len += used;
 422
 423         pjob->pid = pjpid;
 424         pjob->jobid = pjjobid;
 425         pjob->sysjob = pjsysjob;
 426         pjob->fd = pjfd;
 427         pjob->starttime = pjstarttime;
 428         pjob->status = pjstatus;
 429         pjob->size = pjsize;
 430         pjob->page_count = pjpage_count;
 431         pjob->spooled = pjspooled;
 432         pjob->smbjob = pjsmbjob;
 433
 434         return len;
 435
 436 }
 437
 438 /****************************************************************************
 439  Useful function to find a print job in the database.
 440 ****************************************************************************/
 441
 442 static struct printjob *print_job_find(TALLOC_CTX *mem_ctx,
 443                                        const char *sharename,
 444                                        uint32 jobid)
 445 {
 446         struct printjob         *pjob;
 447         uint32_t tmp;
 448         TDB_DATA                ret;
 449         struct tdb_print_db     *pdb = get_print_db_byname(sharename);
 450
 451         DEBUG(10,("print_job_find: looking up job %u for share %s\n",
 452                         (unsigned int)jobid, sharename ));
 453
 454         if (!pdb) {
 455                 return NULL;
 456         }
 457
 458         ret = tdb_fetch_compat(pdb->tdb, print_key(jobid, &tmp));
 459         release_print_db(pdb);
 460
 461         if (!ret.dptr) {
 462                 DEBUG(10, ("print_job_find: failed to find jobid %u.\n",
 463                            jobid));
 464                 return NULL;
 465         }
 466
 467         pjob = talloc_zero(mem_ctx, struct printjob);
 468         if (pjob == NULL) {
 469                 goto err_out;
 470         }
 471
 472         if (unpack_pjob(mem_ctx, ret.dptr, ret.dsize, pjob) == -1) {
 473                 DEBUG(10, ("failed to unpack jobid %u.\n", jobid));
 474                 talloc_free(pjob);
 475                 pjob = NULL;
 476                 goto err_out;
 477         }
 478
 479         DEBUG(10,("print_job_find: returning system job %d for jobid %u.\n",
 480                   pjob->sysjob, jobid));
 481         SMB_ASSERT(pjob->jobid == jobid);
 482
 483 err_out:
 484         SAFE_FREE(ret.dptr);
 485         return pjob;
 486 }
 487
 488 /* Convert a unix jobid to a smb jobid */
 489
 490 struct unixjob_traverse_state {
 491         int sysjob;
 492         uint32 sysjob_to_jobid_value;
 493 };
 494
 495 static int unixjob_traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA key,
 496                                TDB_DATA data, void *private_data)
 497 {
 498         struct printjob *pjob;
 499         struct unixjob_traverse_state *state =
 500                 (struct unixjob_traverse_state *)private_data;
 501
 502         if (!data.dptr || data.dsize == 0)
 503                 return 0;
 504
 505         pjob = (struct printjob *)data.dptr;
 506         if (key.dsize != sizeof(uint32))
 507                 return 0;
 508
 509         if (state->sysjob == pjob->sysjob) {
 510                 state->sysjob_to_jobid_value = pjob->jobid;
 511                 return 1;
 512         }
 513
 514         return 0;
 515 }
 516
 517 static uint32 sysjob_to_jobid_pdb(struct tdb_print_db *pdb, int sysjob)
 518 {
 519         struct unixjob_traverse_state state;
 520
 521         state.sysjob = sysjob;
 522         state.sysjob_to_jobid_value = (uint32)-1;
 523
 524         tdb_traverse(pdb->tdb, unixjob_traverse_fn, &state);
 525
 526         return state.sysjob_to_jobid_value;
 527 }
 528
 529 /****************************************************************************
 530  This is a *horribly expensive call as we have to iterate through all the
 531  current printer tdb's. Don't do this often ! JRA.
 532 ****************************************************************************/
 533
 534 uint32 sysjob_to_jobid(int unix_jobid)
 535 {
 536         int services = lp_numservices();
 537         int snum;
 538         struct unixjob_traverse_state state;
 539
 540         state.sysjob = unix_jobid;
 541         state.sysjob_to_jobid_value = (uint32)-1;
 542
 543         for (snum = 0; snum < services; snum++) {
 544                 struct tdb_print_db *pdb;
 545                 if (!lp_print_ok(snum))
 546                         continue;
 547                 pdb = get_print_db_byname(lp_const_servicename(snum));
 548                 if (!pdb) {
 549                         continue;
 550                 }
 551                 tdb_traverse(pdb->tdb, unixjob_traverse_fn, &state);
 552                 release_print_db(pdb);
 553                 if (state.sysjob_to_jobid_value != (uint32)-1)
 554                         return state.sysjob_to_jobid_value;
 555         }
 556         return (uint32)-1;
 557 }
 558
 559 /****************************************************************************
 560  Send notifications based on what has changed after a pjob_store.
 561 ****************************************************************************/
 562
 563 static const struct {
 564         uint32_t lpq_status;
 565         uint32_t spoolss_status;
 566 } lpq_to_spoolss_status_map[] = {
 567         { LPQ_QUEUED, JOB_STATUS_QUEUED },
 568         { LPQ_PAUSED, JOB_STATUS_PAUSED },
 569         { LPQ_SPOOLING, JOB_STATUS_SPOOLING },
 570         { LPQ_PRINTING, JOB_STATUS_PRINTING },
 571         { LPQ_DELETING, JOB_STATUS_DELETING },
 572         { LPQ_OFFLINE, JOB_STATUS_OFFLINE },
 573         { LPQ_PAPEROUT, JOB_STATUS_PAPEROUT },
 574         { LPQ_PRINTED, JOB_STATUS_PRINTED },
 575         { LPQ_DELETED, JOB_STATUS_DELETED },
 576         { LPQ_BLOCKED, JOB_STATUS_BLOCKED_DEVQ },
 577         { LPQ_USER_INTERVENTION, JOB_STATUS_USER_INTERVENTION },
 578         { (uint32_t)-1, 0 }
 579 };
 580
 581 /* Convert a lpq status value stored in printing.tdb into the
 582    appropriate win32 API constant. */
 583
 584 static uint32 map_to_spoolss_status(uint32 lpq_status)
 585 {
 586         int i = 0;
 587
 588         while (lpq_to_spoolss_status_map[i].lpq_status != -1) {
 589                 if (lpq_to_spoolss_status_map[i].lpq_status == lpq_status)
 590                         return lpq_to_spoolss_status_map[i].spoolss_status;
 591                 i++;
 592         }
 593
 594         return 0;
 595 }
 596
 597 /***************************************************************************
 598  Append a jobid to the 'jobs changed' list.
 599 ***************************************************************************/
 600
 601 static bool add_to_jobs_changed(struct tdb_print_db *pdb, uint32_t jobid)
 602 {
 603         TDB_DATA data;
 604         uint32_t store_jobid;
 605
 606         SIVAL(&store_jobid, 0, jobid);
 607         data.dptr = (uint8 *) &store_jobid;
 608         data.dsize = 4;
 609
 610         DEBUG(10,("add_to_jobs_added: Added jobid %u\n", (unsigned int)jobid ));
 611
 612         return (tdb_append(pdb->tdb, string_tdb_data("INFO/jobs_changed"),
 613                            data) == 0);
 614 }
 615
 616 /***************************************************************************
 617  Remove a jobid from the 'jobs changed' list.
 618 ***************************************************************************/
 619
 620 static bool remove_from_jobs_changed(const char* sharename, uint32_t jobid)
 621 {
 622         struct tdb_print_db *pdb = get_print_db_byname(sharename);
 623         TDB_DATA data, key;
 624         size_t job_count, i;
 625         bool ret = False;
 626         bool gotlock = False;
 627
 628         if (!pdb) {
 629                 return False;
 630         }
 631
 632         ZERO_STRUCT(data);
 633
 634         key = string_tdb_data("INFO/jobs_changed");
 635
 636         if (tdb_chainlock_with_timeout(pdb->tdb, key, 5) != 0)
 637                 goto out;
 638
 639         gotlock = True;
 640
 641         data = tdb_fetch_compat(pdb->tdb, key);
 642
 643         if (data.dptr == NULL || data.dsize == 0 || (data.dsize % 4 != 0))
 644                 goto out;
 645
 646         job_count = data.dsize / 4;
 647         for (i = 0; i < job_count; i++) {
 648                 uint32 ch_jobid;
 649
 650                 ch_jobid = IVAL(data.dptr, i*4);
 651                 if (ch_jobid == jobid) {
 652                         if (i < job_count -1 )
 653                                 memmove(data.dptr + (i*4), data.dptr + (i*4) + 4, (job_count - i - 1)*4 );
 654                         data.dsize -= 4;
 655                         if (tdb_store(pdb->tdb, key, data, TDB_REPLACE) != 0)
 656                                 goto out;
 657                         break;
 658                 }
 659         }
 660
 661         ret = True;
 662   out:
 663
 664         if (gotlock)
 665                 tdb_chainunlock(pdb->tdb, key);
 666         SAFE_FREE(data.dptr);
 667         release_print_db(pdb);
 668         if (ret)
 669                 DEBUG(10,("remove_from_jobs_changed: removed jobid %u\n", (unsigned int)jobid ));
 670         else
 671                 DEBUG(10,("remove_from_jobs_changed: Failed to remove jobid %u\n", (unsigned int)jobid ));
 672         return ret;
 673 }
 674
 675 static void pjob_store_notify(struct tevent_context *ev,
 676                               struct messaging_context *msg_ctx,
 677                               const char* sharename, uint32 jobid,
 678                               struct printjob *old_data,
 679                               struct printjob *new_data,
 680                               bool *pchanged)
 681 {
 682         bool new_job = false;
 683         bool changed = false;
 684
 685         if (old_data == NULL) {
 686                 new_job = true;
 687         }
 688
 689         /* ACHTUNG!  Due to a bug in Samba's spoolss parsing of the
 690            NOTIFY_INFO_DATA buffer, we *have* to send the job submission
 691            time first or else we'll end up with potential alignment
 692            errors.  I don't think the systemtime should be spooled as
 693            a string, but this gets us around that error.
 694            --jerry (i'll feel dirty for this) */
 695
 696         if (new_job) {
 697                 notify_job_submitted(ev, msg_ctx,
 698                                      sharename, jobid, new_data->starttime);
 699                 notify_job_username(ev, msg_ctx,
 700                                     sharename, jobid, new_data->user);
 701                 notify_job_name(ev, msg_ctx,
 702                                 sharename, jobid, new_data->jobname);
 703                 notify_job_status(ev, msg_ctx,
 704                                   sharename, jobid, map_to_spoolss_status(new_data->status));
 705                 notify_job_total_bytes(ev, msg_ctx,
 706                                        sharename, jobid, new_data->size);
 707                 notify_job_total_pages(ev, msg_ctx,
 708                                        sharename, jobid, new_data->page_count);
 709         } else {
 710                 if (!strequal(old_data->jobname, new_data->jobname)) {
 711                         notify_job_name(ev, msg_ctx, sharename,
 712                                         jobid, new_data->jobname);
 713                         changed = true;
 714                 }
 715
 716                 if (old_data->status != new_data->status) {
 717                         notify_job_status(ev, msg_ctx,
 718                                           sharename, jobid,
 719                                           map_to_spoolss_status(new_data->status));
 720                 }
 721
 722                 if (old_data->size != new_data->size) {
 723                         notify_job_total_bytes(ev, msg_ctx,
 724                                                sharename, jobid, new_data->size);
 725                 }
 726
 727                 if (old_data->page_count != new_data->page_count) {
 728                         notify_job_total_pages(ev, msg_ctx,
 729                                                sharename, jobid,
 730                                                new_data->page_count);
 731                 }
 732         }
 733
 734         *pchanged = changed;
 735 }
 736
 737 /****************************************************************************
 738  Store a job structure back to the database.
 739 ****************************************************************************/
 740
 741 static bool pjob_store(struct tevent_context *ev,
 742                        struct messaging_context *msg_ctx,
 743                        const char* sharename, uint32 jobid,
 744                        struct printjob *pjob)
 745 {
 746         uint32_t tmp;
 747         TDB_DATA                old_data, new_data;
 748         bool                    ret = False;
 749         struct tdb_print_db     *pdb = get_print_db_byname(sharename);
 750         uint8                   *buf = NULL;
 751         int                     len, newlen, buflen;
 752
 753
 754         if (!pdb)
 755                 return False;
 756
 757         /* Get old data */
 758
 759         old_data = tdb_fetch_compat(pdb->tdb, print_key(jobid, &tmp));
 760
 761         /* Doh!  Now we have to pack/unpack data since the NT_DEVICEMODE was added */
 762
 763         newlen = 0;
 764
 765         do {
 766                 len = 0;
 767                 buflen = newlen;
 768                 len += tdb_pack(buf+len, buflen-len, "ddddddddddfffff",
 769                                 (uint32)pjob->pid,
 770                                 (uint32)pjob->jobid,
 771                                 (uint32)pjob->sysjob,
 772                                 (uint32)pjob->fd,
 773                                 (uint32)pjob->starttime,
 774                                 (uint32)pjob->status,
 775                                 (uint32)pjob->size,
 776                                 (uint32)pjob->page_count,
 777                                 (uint32)pjob->spooled,
 778                                 (uint32)pjob->smbjob,
 779                                 pjob->filename,
 780                                 pjob->jobname,
 781                                 pjob->user,
 782                                 pjob->clientmachine,
 783                                 pjob->queuename);
 784
 785                 len += pack_devicemode(pjob->devmode, buf+len, buflen-len);
 786
 787                 if (buflen != len) {
 788                         buf = (uint8 *)SMB_REALLOC(buf, len);
 789                         if (!buf) {
 790                                 DEBUG(0,("pjob_store: failed to enlarge buffer!\n"));
 791                                 goto done;
 792                         }
 793                         newlen = len;
 794                 }
 795         } while ( buflen != len );
 796
 797
 798         /* Store new data */
 799
 800         new_data.dptr = buf;
 801         new_data.dsize = len;
 802         ret = (tdb_store(pdb->tdb, print_key(jobid, &tmp), new_data,
 803                          TDB_REPLACE) == 0);
 804
 805         /* Send notify updates for what has changed */
 806
 807         if (ret) {
 808                 bool changed = false;
 809                 struct printjob old_pjob;
 810
 811                 if (old_data.dsize) {
 812                         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 813                         if (tmp_ctx == NULL)
 814                                 goto done;
 815
 816                         len = unpack_pjob(tmp_ctx, old_data.dptr,
 817                                           old_data.dsize, &old_pjob);
 818                         if (len != -1 ) {
 819                                 pjob_store_notify(ev,
 820                                                   msg_ctx,
 821                                                   sharename, jobid, &old_pjob,
 822                                                   pjob,
 823                                                   &changed);
 824                                 if (changed) {
 825                                         add_to_jobs_changed(pdb, jobid);
 826                                 }
 827                         }
 828                         talloc_free(tmp_ctx);
 829
 830                 } else {
 831                         /* new job */
 832                         pjob_store_notify(ev, msg_ctx,
 833                                           sharename, jobid, NULL, pjob,
 834                                           &changed);
 835                 }
 836         }
 837
 838 done:
 839         release_print_db(pdb);
 840         SAFE_FREE( old_data.dptr );
 841         SAFE_FREE( buf );
 842
 843         return ret;
 844 }
 845
 846 /****************************************************************************
 847  Remove a job structure from the database.
 848 ****************************************************************************/
 849
 850 static void pjob_delete(struct tevent_context *ev,
 851                         struct messaging_context *msg_ctx,
 852                         const char* sharename, uint32 jobid)
 853 {
 854         uint32_t tmp;
 855         struct printjob *pjob;
 856         uint32 job_status = 0;
 857         struct tdb_print_db *pdb;
 858         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 859         if (tmp_ctx == NULL) {
 860                 return;
 861         }
 862
 863         pdb = get_print_db_byname(sharename);
 864         if (!pdb) {
 865                 goto err_out;
 866         }
 867
 868         pjob = print_job_find(tmp_ctx, sharename, jobid);
 869         if (!pjob) {
 870                 DEBUG(5, ("we were asked to delete nonexistent job %u\n",
 871                           jobid));
 872                 goto err_release;
 873         }
 874
 875         /* We must cycle through JOB_STATUS_DELETING and
 876            JOB_STATUS_DELETED for the port monitor to delete the job
 877            properly. */
 878
 879         job_status = JOB_STATUS_DELETING|JOB_STATUS_DELETED;
 880         notify_job_status(ev, msg_ctx, sharename, jobid, job_status);
 881
 882         /* Remove from printing.tdb */
 883
 884         tdb_delete(pdb->tdb, print_key(jobid, &tmp));
 885         remove_from_jobs_added(sharename, jobid);
 886         rap_jobid_delete(sharename, jobid);
 887 err_release:
 888         release_print_db(pdb);
 889 err_out:
 890         talloc_free(tmp_ctx);
 891 }
 892
 893 /****************************************************************************
 894  List a unix job in the print database.
 895 ****************************************************************************/
 896
 897 static void print_unix_job(struct tevent_context *ev,
 898                            struct messaging_context *msg_ctx,
 899                            const char *sharename, print_queue_struct *q,
 900                            uint32 jobid)
 901 {
 902         struct printjob pj, *old_pj;
 903         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 904         if (tmp_ctx == NULL) {
 905                 return;
 906         }
 907
 908         if (jobid == (uint32)-1) {
 909                 jobid = q->sysjob + UNIX_JOB_START;
 910         }
 911
 912         /* Preserve the timestamp on an existing unix print job */
 913
 914         old_pj = print_job_find(tmp_ctx, sharename, jobid);
 915
 916         ZERO_STRUCT(pj);
 917
 918         pj.pid = (pid_t)-1;
 919         pj.jobid = jobid;
 920         pj.sysjob = q->sysjob;
 921         pj.fd = -1;
 922         pj.starttime = old_pj ? old_pj->starttime : q->time;
 923         pj.status = q->status;
 924         pj.size = q->size;
 925         pj.spooled = True;
 926         fstrcpy(pj.filename, old_pj ? old_pj->filename : "");
 927         if (jobid < UNIX_JOB_START) {
 928                 pj.smbjob = True;
 929                 fstrcpy(pj.jobname, old_pj ? old_pj->jobname : "Remote Downlevel Document");
 930         } else {
 931                 pj.smbjob = False;
 932                 fstrcpy(pj.jobname, old_pj ? old_pj->jobname : q->fs_file);
 933         }
 934         fstrcpy(pj.user, old_pj ? old_pj->user : q->fs_user);
 935         fstrcpy(pj.queuename, old_pj ? old_pj->queuename : sharename );
 936
 937         pjob_store(ev, msg_ctx, sharename, jobid, &pj);
 938         talloc_free(tmp_ctx);
 939 }
 940
 941
 942 struct traverse_struct {
 943         print_queue_struct *queue;
 944         int qcount, snum, maxcount, total_jobs;
 945         const char *sharename;
 946         time_t lpq_time;
 947         const char *lprm_command;
 948         struct printif *print_if;
 949         struct tevent_context *ev;
 950         struct messaging_context *msg_ctx;
 951         TALLOC_CTX *mem_ctx;
 952 };
 953
 954 /****************************************************************************
 955  Utility fn to delete any jobs that are no longer active.
 956 ****************************************************************************/
 957
 958 static int traverse_fn_delete(TDB_CONTEXT *t, TDB_DATA key, TDB_DATA data, void *state)
 959 {
 960         struct traverse_struct *ts = (struct traverse_struct *)state;
 961         struct printjob pjob;
 962         uint32 jobid;
 963         int i = 0;
 964
 965         if (  key.dsize != sizeof(jobid) )
 966                 return 0;
 967
 968         if (unpack_pjob(ts->mem_ctx, data.dptr, data.dsize, &pjob) == -1)
 969                 return 0;
 970         talloc_free(pjob.devmode);
 971         jobid = pjob.jobid;
 972
 973         if (!pjob.smbjob) {
 974                 /* remove a unix job if it isn't in the system queue any more */
 975                 for (i=0;i<ts->qcount;i++) {
 976                         if (ts->queue[i].sysjob == pjob.sysjob) {
 977                                 break;
 978                         }
 979                 }
 980                 if (i == ts->qcount) {
 981                         DEBUG(10,("traverse_fn_delete: pjob %u deleted due to !smbjob\n",
 982                                                 (unsigned int)jobid ));
 983                         pjob_delete(ts->ev, ts->msg_ctx,
 984                                     ts->sharename, jobid);
 985                         return 0;
 986                 }
 987
 988                 /* need to continue the the bottom of the function to
 989                    save the correct attributes */
 990         }
 991
 992         /* maybe it hasn't been spooled yet */
 993         if (!pjob.spooled) {
 994                 /* if a job is not spooled and the process doesn't
 995                    exist then kill it. This cleans up after smbd
 996                    deaths */
 997                 if (!process_exists_by_pid(pjob.pid)) {
 998                         DEBUG(10,("traverse_fn_delete: pjob %u deleted due to !process_exists (%u)\n",
 999                                                 (unsigned int)jobid, (unsigned int)pjob.pid ));
1000                         pjob_delete(ts->ev, ts->msg_ctx,
1001                                     ts->sharename, jobid);
1002                 } else
1003                         ts->total_jobs++;
1004                 return 0;
1005         }
1006
1007         /* this check only makes sense for jobs submitted from Windows clients */
1008
1009         if (pjob.smbjob) {
1010                 for (i=0;i<ts->qcount;i++) {
1011                         if ( pjob.status == LPQ_DELETED )
1012                                 continue;
1013
1014                         if (ts->queue[i].sysjob == pjob.sysjob) {
1015
1016                                 /* try to clean up any jobs that need to be deleted */
1017
1018                                 if ( pjob.status == LPQ_DELETING ) {
1019                                         int result;
1020
1021                                         result = (*(ts->print_if->job_delete))(
1022                                                 ts->sharename, ts->lprm_command, &pjob );
1023
1024                                         if ( result != 0 ) {
1025                                                 /* if we can't delete, then reset the job status */
1026                                                 pjob.status = LPQ_QUEUED;
1027                                                 pjob_store(ts->ev, ts->msg_ctx,
1028                                                            ts->sharename, jobid, &pjob);
1029                                         }
1030                                         else {
1031                                                 /* if we deleted the job, the remove the tdb record */
1032                                                 pjob_delete(ts->ev,
1033                                                             ts->msg_ctx,
1034                                                             ts->sharename, jobid);
1035                                                 pjob.status = LPQ_DELETED;
1036                                         }
1037
1038                                 }
1039
1040                                 break;
1041                         }
1042                 }
1043         }
1044
1045         /* The job isn't in the system queue - we have to assume it has
1046            completed, so delete the database entry. */
1047
1048         if (i == ts->qcount) {
1049
1050                 /* A race can occur between the time a job is spooled and
1051                    when it appears in the lpq output.  This happens when
1052                    the job is added to printing.tdb when another smbd
1053                    running print_queue_update() has completed a lpq and
1054                    is currently traversing the printing tdb and deleting jobs.
1055                    Don't delete the job if it was submitted after the lpq_time. */
1056
1057                 if (pjob.starttime < ts->lpq_time) {
1058                         DEBUG(10,("traverse_fn_delete: pjob %u deleted due to pjob.starttime (%u) < ts->lpq_time (%u)\n",
1059                                                 (unsigned int)jobid,
1060                                                 (unsigned int)pjob.starttime,
1061                                                 (unsigned int)ts->lpq_time ));
1062                         pjob_delete(ts->ev, ts->msg_ctx,
1063                                     ts->sharename, jobid);
1064                 } else
1065                         ts->total_jobs++;
1066                 return 0;
1067         }
1068
1069         /* Save the pjob attributes we will store. */
1070         ts->queue[i].sysjob = pjob.sysjob;
1071         ts->queue[i].size = pjob.size;
1072         ts->queue[i].page_count = pjob.page_count;
1073         ts->queue[i].status = pjob.status;
1074         ts->queue[i].priority = 1;
1075         ts->queue[i].time = pjob.starttime;
1076         fstrcpy(ts->queue[i].fs_user, pjob.user);
1077         fstrcpy(ts->queue[i].fs_file, pjob.jobname);
1078
1079         ts->total_jobs++;
1080
1081         return 0;
1082 }
1083
1084 /****************************************************************************
1085  Check if the print queue has been updated recently enough.
1086 ****************************************************************************/
1087
1088 static void print_cache_flush(const char *sharename)
1089 {
1090         fstring key;
1091         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1092
1093         if (!pdb)
1094                 return;
1095         slprintf(key, sizeof(key)-1, "CACHE/%s", sharename);
1096         tdb_store_int32(pdb->tdb, key, -1);
1097         release_print_db(pdb);
1098 }
1099
1100 /****************************************************************************
1101  Check if someone already thinks they are doing the update.
1102 ****************************************************************************/
1103
1104 static pid_t get_updating_pid(const char *sharename)
1105 {
1106         fstring keystr;
1107         TDB_DATA data, key;
1108         pid_t updating_pid;
1109         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1110
1111         if (!pdb)
1112                 return (pid_t)-1;
1113         slprintf(keystr, sizeof(keystr)-1, "UPDATING/%s", sharename);
1114         key = string_tdb_data(keystr);
1115
1116         data = tdb_fetch_compat(pdb->tdb, key);
1117         release_print_db(pdb);
1118         if (!data.dptr || data.dsize != sizeof(pid_t)) {
1119                 SAFE_FREE(data.dptr);
1120                 return (pid_t)-1;
1121         }
1122
1123         updating_pid = IVAL(data.dptr, 0);
1124         SAFE_FREE(data.dptr);
1125
1126         if (process_exists_by_pid(updating_pid))
1127                 return updating_pid;
1128
1129         return (pid_t)-1;
1130 }
1131
1132 /****************************************************************************
1133  Set the fact that we're doing the update, or have finished doing the update
1134  in the tdb.
1135 ****************************************************************************/
1136
1137 static void set_updating_pid(const fstring sharename, bool updating)
1138 {
1139         fstring keystr;
1140         TDB_DATA key;
1141         TDB_DATA data;
1142         pid_t updating_pid = getpid();
1143         uint8 buffer[4];
1144
1145         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1146
1147         if (!pdb)
1148                 return;
1149
1150         slprintf(keystr, sizeof(keystr)-1, "UPDATING/%s", sharename);
1151         key = string_tdb_data(keystr);
1152
1153         DEBUG(5, ("set_updating_pid: %s updating lpq cache for print share %s\n",
1154                 updating ? "" : "not ",
1155                 sharename ));
1156
1157         if ( !updating ) {
1158                 tdb_delete(pdb->tdb, key);
1159                 release_print_db(pdb);
1160                 return;
1161         }
1162
1163         SIVAL( buffer, 0, updating_pid);
1164         data.dptr = buffer;
1165         data.dsize = 4;         /* we always assume this is a 4 byte value */
1166
1167         tdb_store(pdb->tdb, key, data, TDB_REPLACE);
1168         release_print_db(pdb);
1169 }
1170
1171 /****************************************************************************
1172  Sort print jobs by submittal time.
1173 ****************************************************************************/
1174
1175 static int printjob_comp(print_queue_struct *j1, print_queue_struct *j2)
1176 {
1177         /* Silly cases */
1178
1179         if (!j1 && !j2)
1180                 return 0;
1181         if (!j1)
1182                 return -1;
1183         if (!j2)
1184                 return 1;
1185
1186         /* Sort on job start time */
1187
1188         if (j1->time == j2->time)
1189                 return 0;
1190         return (j1->time > j2->time) ? 1 : -1;
1191 }
1192
1193 /****************************************************************************
1194  Store the sorted queue representation for later portmon retrieval.
1195  Skip deleted jobs
1196 ****************************************************************************/
1197
1198 static void store_queue_struct(struct tdb_print_db *pdb, struct traverse_struct *pts)
1199 {
1200         TDB_DATA data;
1201         int max_reported_jobs = lp_max_reported_jobs(pts->snum);
1202         print_queue_struct *queue = pts->queue;
1203         size_t len;
1204         size_t i;
1205         unsigned int qcount;
1206
1207         if (max_reported_jobs && (max_reported_jobs < pts->qcount))
1208                 pts->qcount = max_reported_jobs;
1209         qcount = 0;
1210
1211         /* Work out the size. */
1212         data.dsize = 0;
1213         data.dsize += tdb_pack(NULL, 0, "d", qcount);
1214
1215         for (i = 0; i < pts->qcount; i++) {
1216                 if ( queue[i].status == LPQ_DELETED )
1217                         continue;
1218
1219                 qcount++;
1220                 data.dsize += tdb_pack(NULL, 0, "ddddddff",
1221                                 (uint32)queue[i].sysjob,
1222                                 (uint32)queue[i].size,
1223                                 (uint32)queue[i].page_count,
1224                                 (uint32)queue[i].status,
1225                                 (uint32)queue[i].priority,
1226                                 (uint32)queue[i].time,
1227                                 queue[i].fs_user,
1228                                 queue[i].fs_file);
1229         }
1230
1231         if ((data.dptr = (uint8 *)SMB_MALLOC(data.dsize)) == NULL)
1232                 return;
1233
1234         len = 0;
1235         len += tdb_pack(data.dptr + len, data.dsize - len, "d", qcount);
1236         for (i = 0; i < pts->qcount; i++) {
1237                 if ( queue[i].status == LPQ_DELETED )
1238                         continue;
1239
1240                 len += tdb_pack(data.dptr + len, data.dsize - len, "ddddddff",
1241                                 (uint32)queue[i].sysjob,
1242                                 (uint32)queue[i].size,
1243                                 (uint32)queue[i].page_count,
1244                                 (uint32)queue[i].status,
1245                                 (uint32)queue[i].priority,
1246                                 (uint32)queue[i].time,
1247                                 queue[i].fs_user,
1248                                 queue[i].fs_file);
1249         }
1250
1251         tdb_store(pdb->tdb, string_tdb_data("INFO/linear_queue_array"), data,
1252                   TDB_REPLACE);
1253         SAFE_FREE(data.dptr);
1254         return;
1255 }
1256
1257 static TDB_DATA get_jobs_added_data(struct tdb_print_db *pdb)
1258 {
1259         TDB_DATA data;
1260
1261         ZERO_STRUCT(data);
1262
1263         data = tdb_fetch_compat(pdb->tdb, string_tdb_data("INFO/jobs_added"));
1264         if (data.dptr == NULL || data.dsize == 0 || (data.dsize % 4 != 0)) {
1265                 SAFE_FREE(data.dptr);
1266                 ZERO_STRUCT(data);
1267         }
1268
1269         return data;
1270 }
1271
1272 static void check_job_added(const char *sharename, TDB_DATA data, uint32 jobid)
1273 {
1274         unsigned int i;
1275         unsigned int job_count = data.dsize / 4;
1276
1277         for (i = 0; i < job_count; i++) {
1278                 uint32 ch_jobid;
1279
1280                 ch_jobid = IVAL(data.dptr, i*4);
1281                 if (ch_jobid == jobid)
1282                         remove_from_jobs_added(sharename, jobid);
1283         }
1284 }
1285
1286 /****************************************************************************
1287  Check if the print queue has been updated recently enough.
1288 ****************************************************************************/
1289
1290 static bool print_cache_expired(const char *sharename, bool check_pending)
1291 {
1292         fstring key;
1293         time_t last_qscan_time, time_now = time(NULL);
1294         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1295         bool result = False;
1296
1297         if (!pdb)
1298                 return False;
1299
1300         snprintf(key, sizeof(key), "CACHE/%s", sharename);
1301         last_qscan_time = (time_t)tdb_fetch_int32(pdb->tdb, key);
1302
1303         /*
1304          * Invalidate the queue for 3 reasons.
1305          * (1). last queue scan time == -1.
1306          * (2). Current time - last queue scan time > allowed cache time.
1307          * (3). last queue scan time > current time + MAX_CACHE_VALID_TIME (1 hour by default).
1308          * This last test picks up machines for which the clock has been moved
1309          * forward, an lpq scan done and then the clock moved back. Otherwise
1310          * that last lpq scan would stay around for a loooong loooong time... :-). JRA.
1311          */
1312
1313         if (last_qscan_time == ((time_t)-1)
1314                 || (time_now - last_qscan_time) >= lp_lpqcachetime()
1315                 || last_qscan_time > (time_now + MAX_CACHE_VALID_TIME))
1316         {
1317                 uint32 u;
1318                 time_t msg_pending_time;
1319
1320                 DEBUG(4, ("print_cache_expired: cache expired for queue %s "
1321                         "(last_qscan_time = %d, time now = %d, qcachetime = %d)\n",
1322                         sharename, (int)last_qscan_time, (int)time_now,
1323                         (int)lp_lpqcachetime() ));
1324
1325                 /* check if another smbd has already sent a message to update the
1326                    queue.  Give the pending message one minute to clear and
1327                    then send another message anyways.  Make sure to check for
1328                    clocks that have been run forward and then back again. */
1329
1330                 snprintf(key, sizeof(key), "MSG_PENDING/%s", sharename);
1331
1332                 if ( check_pending
1333                         && tdb_fetch_uint32( pdb->tdb, key, &u )
1334                         && (msg_pending_time=u) > 0
1335                         && msg_pending_time <= time_now
1336                         && (time_now - msg_pending_time) < 60 )
1337                 {
1338                         DEBUG(4,("print_cache_expired: message already pending for %s.  Accepting cache\n",
1339                                 sharename));
1340                         goto done;
1341                 }
1342
1343                 result = True;
1344         }
1345
1346 done:
1347         release_print_db(pdb);
1348         return result;
1349 }
1350
1351 /****************************************************************************
1352  main work for updating the lpq cache for a printer queue
1353 ****************************************************************************/
1354
1355 static void print_queue_update_internal(struct tevent_context *ev,
1356                                         struct messaging_context *msg_ctx,
1357                                         const char *sharename,
1358                                         struct printif *current_printif,
1359                                         char *lpq_command, char *lprm_command)
1360 {
1361         int i, qcount;
1362         print_queue_struct *queue = NULL;
1363         print_status_struct status;
1364         print_status_struct old_status;
1365         struct printjob *pjob;
1366         struct traverse_struct tstruct;
1367         TDB_DATA data, key;
1368         TDB_DATA jcdata;
1369         fstring keystr, cachestr;
1370         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1371         TALLOC_CTX *tmp_ctx = talloc_new(ev);
1372
1373         if ((pdb == NULL) || (tmp_ctx == NULL)) {
1374                 return;
1375         }
1376
1377         DEBUG(5,("print_queue_update_internal: printer = %s, type = %d, lpq command = [%s]\n",
1378                 sharename, current_printif->type, lpq_command));
1379
1380         /*
1381          * Update the cache time FIRST ! Stops others even
1382          * attempting to get the lock and doing this
1383          * if the lpq takes a long time.
1384          */
1385
1386         slprintf(cachestr, sizeof(cachestr)-1, "CACHE/%s", sharename);
1387         tdb_store_int32(pdb->tdb, cachestr, (int)time(NULL));
1388
1389         /* get the current queue using the appropriate interface */
1390         ZERO_STRUCT(status);
1391
1392         qcount = (*(current_printif->queue_get))(sharename,
1393                 current_printif->type,
1394                 lpq_command, &queue, &status);
1395
1396         DEBUG(3, ("print_queue_update_internal: %d job%s in queue for %s\n",
1397                 qcount, (qcount != 1) ? "s" : "", sharename));
1398
1399         /* Sort the queue by submission time otherwise they are displayed
1400            in hash order. */
1401
1402         TYPESAFE_QSORT(queue, qcount, printjob_comp);
1403
1404         /*
1405           any job in the internal database that is marked as spooled
1406           and doesn't exist in the system queue is considered finished
1407           and removed from the database
1408
1409           any job in the system database but not in the internal database
1410           is added as a unix job
1411
1412           fill in any system job numbers as we go
1413         */
1414         jcdata = get_jobs_added_data(pdb);
1415
1416         for (i=0; i<qcount; i++) {
1417                 uint32 jobid = sysjob_to_jobid_pdb(pdb, queue[i].sysjob);
1418                 if (jobid == (uint32)-1) {
1419                         /* assume its a unix print job */
1420                         print_unix_job(ev, msg_ctx,
1421                                        sharename, &queue[i], jobid);
1422                         continue;
1423                 }
1424
1425                 /* we have an active SMB print job - update its status */
1426                 pjob = print_job_find(tmp_ctx, sharename, jobid);
1427                 if (!pjob) {
1428                         /* err, somethings wrong. Probably smbd was restarted
1429                            with jobs in the queue. All we can do is treat them
1430                            like unix jobs. Pity. */
1431                         DEBUG(1, ("queued print job %d not found in jobs list, "
1432                                   "assuming unix job\n", jobid));
1433                         print_unix_job(ev, msg_ctx,
1434                                        sharename, &queue[i], jobid);
1435                         continue;
1436                 }
1437
1438                 /* don't reset the status on jobs to be deleted */
1439
1440                 if ( pjob->status != LPQ_DELETING )
1441                         pjob->status = queue[i].status;
1442
1443                 pjob_store(ev, msg_ctx, sharename, jobid, pjob);
1444
1445                 check_job_added(sharename, jcdata, jobid);
1446         }
1447
1448         SAFE_FREE(jcdata.dptr);
1449
1450         /* now delete any queued entries that don't appear in the
1451            system queue */
1452         tstruct.queue = queue;
1453         tstruct.qcount = qcount;
1454         tstruct.snum = -1;
1455         tstruct.total_jobs = 0;
1456         tstruct.lpq_time = time(NULL);
1457         tstruct.sharename = sharename;
1458         tstruct.lprm_command = lprm_command;
1459         tstruct.print_if = current_printif;
1460         tstruct.ev = ev;
1461         tstruct.msg_ctx = msg_ctx;
1462         tstruct.mem_ctx = tmp_ctx;
1463
1464         tdb_traverse(pdb->tdb, traverse_fn_delete, (void *)&tstruct);
1465
1466         /* Store the linearised queue, max jobs only. */
1467         store_queue_struct(pdb, &tstruct);
1468
1469         SAFE_FREE(tstruct.queue);
1470         talloc_free(tmp_ctx);
1471
1472         DEBUG(10,("print_queue_update_internal: printer %s INFO/total_jobs = %d\n",
1473                                 sharename, tstruct.total_jobs ));
1474
1475         tdb_store_int32(pdb->tdb, "INFO/total_jobs", tstruct.total_jobs);
1476
1477         get_queue_status(sharename, &old_status);
1478         if (old_status.qcount != qcount)
1479                 DEBUG(10,("print_queue_update_internal: queue status change %d jobs -> %d jobs for printer %s\n",
1480                                         old_status.qcount, qcount, sharename));
1481
1482         /* store the new queue status structure */
1483         slprintf(keystr, sizeof(keystr)-1, "STATUS/%s", sharename);
1484         key = string_tdb_data(keystr);
1485
1486         status.qcount = qcount;
1487         data.dptr = (uint8 *)&status;
1488         data.dsize = sizeof(status);
1489         tdb_store(pdb->tdb, key, data, TDB_REPLACE);
1490
1491         /*
1492          * Update the cache time again. We want to do this call
1493          * as little as possible...
1494          */
1495
1496         slprintf(keystr, sizeof(keystr)-1, "CACHE/%s", sharename);
1497         tdb_store_int32(pdb->tdb, keystr, (int32)time(NULL));
1498
1499         /* clear the msg pending record for this queue */
1500
1501         snprintf(keystr, sizeof(keystr), "MSG_PENDING/%s", sharename);
1502
1503         if ( !tdb_store_uint32( pdb->tdb, keystr, 0 ) ) {
1504                 /* log a message but continue on */
1505
1506                 DEBUG(0,("print_queue_update: failed to store MSG_PENDING flag for [%s]!\n",
1507                         sharename));
1508         }
1509
1510         release_print_db( pdb );
1511
1512         return;
1513 }
1514
1515 /****************************************************************************
1516  Update the internal database from the system print queue for a queue.
1517  obtain a lock on the print queue before proceeding (needed when mutiple
1518  smbd processes maytry to update the lpq cache concurrently).
1519 ****************************************************************************/
1520
1521 static void print_queue_update_with_lock( struct tevent_context *ev,
1522                                           struct messaging_context *msg_ctx,
1523                                           const char *sharename,
1524                                           struct printif *current_printif,
1525                                           char *lpq_command, char *lprm_command )
1526 {
1527         fstring keystr;
1528         struct tdb_print_db *pdb;
1529
1530         DEBUG(5,("print_queue_update_with_lock: printer share = %s\n", sharename));
1531         pdb = get_print_db_byname(sharename);
1532         if (!pdb)
1533                 return;
1534
1535         if ( !print_cache_expired(sharename, False) ) {
1536                 DEBUG(5,("print_queue_update_with_lock: print cache for %s is still ok\n", sharename));
1537                 release_print_db(pdb);
1538                 return;
1539         }
1540
1541         /*
1542          * Check to see if someone else is doing this update.
1543          * This is essentially a mutex on the update.
1544          */
1545
1546         if (get_updating_pid(sharename) != -1) {
1547                 release_print_db(pdb);
1548                 return;
1549         }
1550
1551         /* Lock the queue for the database update */
1552
1553         slprintf(keystr, sizeof(keystr) - 1, "LOCK/%s", sharename);
1554         /* Only wait 10 seconds for this. */
1555         if (tdb_lock_bystring_with_timeout(pdb->tdb, keystr, 10) != 0) {
1556                 DEBUG(0,("print_queue_update_with_lock: Failed to lock printer %s database\n", sharename));
1557                 release_print_db(pdb);
1558                 return;
1559         }
1560
1561         /*
1562          * Ensure that no one else got in here.
1563          * If the updating pid is still -1 then we are
1564          * the winner.
1565          */
1566
1567         if (get_updating_pid(sharename) != -1) {
1568                 /*
1569                  * Someone else is doing the update, exit.
1570                  */
1571                 tdb_unlock_bystring(pdb->tdb, keystr);
1572                 release_print_db(pdb);
1573                 return;
1574         }
1575
1576         /*
1577          * We're going to do the update ourselves.
1578          */
1579
1580         /* Tell others we're doing the update. */
1581         set_updating_pid(sharename, True);
1582
1583         /*
1584          * Allow others to enter and notice we're doing
1585          * the update.
1586          */
1587
1588         tdb_unlock_bystring(pdb->tdb, keystr);
1589
1590         /* do the main work now */
1591
1592         print_queue_update_internal(ev, msg_ctx,
1593                                     sharename, current_printif,
1594                                     lpq_command, lprm_command);
1595
1596         /* Delete our pid from the db. */
1597         set_updating_pid(sharename, False);
1598         release_print_db(pdb);
1599 }
1600
1601 /****************************************************************************
1602 this is the receive function of the background lpq updater
1603 ****************************************************************************/
1604 void print_queue_receive(struct messaging_context *msg,
1605                                 void *private_data,
1606                                 uint32_t msg_type,
1607                                 struct server_id server_id,
1608                                 DATA_BLOB *data)
1609 {
1610         fstring sharename;
1611         char *lpqcommand = NULL, *lprmcommand = NULL;
1612         int printing_type;
1613         size_t len;
1614
1615         len = tdb_unpack( (uint8 *)data->data, data->length, "fdPP",
1616                 sharename,
1617                 &printing_type,
1618                 &lpqcommand,
1619                 &lprmcommand );
1620
1621         if ( len == -1 ) {
1622                 SAFE_FREE(lpqcommand);
1623                 SAFE_FREE(lprmcommand);
1624                 DEBUG(0,("print_queue_receive: Got invalid print queue update message\n"));
1625                 return;
1626         }
1627
1628         print_queue_update_with_lock(server_event_context(), msg, sharename,
1629                 get_printer_fns_from_type((enum printing_types)printing_type),
1630                 lpqcommand, lprmcommand );
1631
1632         SAFE_FREE(lpqcommand);
1633         SAFE_FREE(lprmcommand);
1634         return;
1635 }
1636
1637 /****************************************************************************
1638 update the internal database from the system print queue for a queue
1639 ****************************************************************************/
1640
1641 extern pid_t background_lpq_updater_pid;
1642
1643 static void print_queue_update(struct messaging_context *msg_ctx,
1644                                int snum, bool force)
1645 {
1646         fstring key;
1647         fstring sharename;
1648         char *lpqcommand = NULL;
1649         char *lprmcommand = NULL;
1650         uint8 *buffer = NULL;
1651         size_t len = 0;
1652         size_t newlen;
1653         struct tdb_print_db *pdb;
1654         int type;
1655         struct printif *current_printif;
1656         TALLOC_CTX *ctx = talloc_tos();
1657
1658         fstrcpy( sharename, lp_const_servicename(snum));
1659
1660         /* don't strip out characters like '$' from the printername */
1661
1662         lpqcommand = talloc_string_sub2(ctx,
1663                         lp_lpqcommand(snum),
1664                         "%p",
1665                         lp_printername(snum),
1666                         false, false, false);
1667         if (!lpqcommand) {
1668                 return;
1669         }
1670         lpqcommand = talloc_sub_advanced(ctx,
1671                         lp_servicename(snum),
1672                         current_user_info.unix_name,
1673                         "",
1674                         current_user.ut.gid,
1675                         get_current_username(),
1676                         current_user_info.domain,
1677                         lpqcommand);
1678         if (!lpqcommand) {
1679                 return;
1680         }
1681
1682         lprmcommand = talloc_string_sub2(ctx,
1683                         lp_lprmcommand(snum),
1684                         "%p",
1685                         lp_printername(snum),
1686                         false, false, false);
1687         if (!lprmcommand) {
1688                 return;
1689         }
1690         lprmcommand = talloc_sub_advanced(ctx,
1691                         lp_servicename(snum),
1692                         current_user_info.unix_name,
1693                         "",
1694                         current_user.ut.gid,
1695                         get_current_username(),
1696                         current_user_info.domain,
1697                         lprmcommand);
1698         if (!lprmcommand) {
1699                 return;
1700         }
1701
1702         /*
1703          * Make sure that the background queue process exists.
1704          * Otherwise just do the update ourselves
1705          */
1706
1707         if ( force || background_lpq_updater_pid == -1 ) {
1708                 DEBUG(4,("print_queue_update: updating queue [%s] myself\n", sharename));
1709                 current_printif = get_printer_fns( snum );
1710                 print_queue_update_with_lock(server_event_context(), msg_ctx,
1711                                              sharename, current_printif,
1712                                              lpqcommand, lprmcommand);
1713
1714                 return;
1715         }
1716
1717         type = lp_printing(snum);
1718
1719         /* get the length */
1720
1721         len = tdb_pack( NULL, 0, "fdPP",
1722                 sharename,
1723                 type,
1724                 lpqcommand,
1725                 lprmcommand );
1726
1727         buffer = SMB_XMALLOC_ARRAY( uint8, len );
1728
1729         /* now pack the buffer */
1730         newlen = tdb_pack( buffer, len, "fdPP",
1731                 sharename,
1732                 type,
1733                 lpqcommand,
1734                 lprmcommand );
1735
1736         SMB_ASSERT( newlen == len );
1737
1738         DEBUG(10,("print_queue_update: Sending message -> printer = %s, "
1739                 "type = %d, lpq command = [%s] lprm command = [%s]\n",
1740                 sharename, type, lpqcommand, lprmcommand ));
1741
1742         /* here we set a msg pending record for other smbd processes
1743            to throttle the number of duplicate print_queue_update msgs
1744            sent.  */
1745
1746         pdb = get_print_db_byname(sharename);
1747         if (!pdb) {
1748                 SAFE_FREE(buffer);
1749                 return;
1750         }
1751
1752         snprintf(key, sizeof(key), "MSG_PENDING/%s", sharename);
1753
1754         if ( !tdb_store_uint32( pdb->tdb, key, time(NULL) ) ) {
1755                 /* log a message but continue on */
1756
1757                 DEBUG(0,("print_queue_update: failed to store MSG_PENDING flag for [%s]!\n",
1758                         sharename));
1759         }
1760
1761         release_print_db( pdb );
1762
1763         /* finally send the message */
1764
1765         messaging_send_buf(msg_ctx, pid_to_procid(background_lpq_updater_pid),
1766                            MSG_PRINTER_UPDATE, (uint8 *)buffer, len);
1767
1768         SAFE_FREE( buffer );
1769
1770         return;
1771 }
1772
1773 /****************************************************************************
1774  Create/Update an entry in the print tdb that will allow us to send notify
1775  updates only to interested smbd's.
1776 ****************************************************************************/
1777
1778 bool print_notify_register_pid(int snum)
1779 {
1780         TDB_DATA data;
1781         struct tdb_print_db *pdb = NULL;
1782         TDB_CONTEXT *tdb = NULL;
1783         const char *printername;
1784         uint32_t mypid = (uint32_t)getpid();
1785         bool ret = False;
1786         size_t i;
1787
1788         /* if (snum == -1), then the change notify request was
1789            on a print server handle and we need to register on
1790            all print queus */
1791
1792         if (snum == -1)
1793         {
1794                 int num_services = lp_numservices();
1795                 int idx;
1796
1797                 for ( idx=0; idx<num_services; idx++ ) {
1798                         if (lp_snum_ok(idx) && lp_print_ok(idx) )
1799                                 print_notify_register_pid(idx);
1800                 }
1801
1802                 return True;
1803         }
1804         else /* register for a specific printer */
1805         {
1806                 printername = lp_const_servicename(snum);
1807                 pdb = get_print_db_byname(printername);
1808                 if (!pdb)
1809                         return False;
1810                 tdb = pdb->tdb;
1811         }
1812
1813         if (tdb_lock_bystring_with_timeout(tdb, NOTIFY_PID_LIST_KEY, 10) != 0) {
1814                 DEBUG(0,("print_notify_register_pid: Failed to lock printer %s\n",
1815                                         printername));
1816                 if (pdb)
1817                         release_print_db(pdb);
1818                 return False;
1819         }
1820
1821         data = get_printer_notify_pid_list( tdb, printername, True );
1822
1823         /* Add ourselves and increase the refcount. */
1824
1825         for (i = 0; i < data.dsize; i += 8) {
1826                 if (IVAL(data.dptr,i) == mypid) {
1827                         uint32 new_refcount = IVAL(data.dptr, i+4) + 1;
1828                         SIVAL(data.dptr, i+4, new_refcount);
1829                         break;
1830                 }
1831         }
1832
1833         if (i == data.dsize) {
1834                 /* We weren't in the list. Realloc. */
1835                 data.dptr = (uint8 *)SMB_REALLOC(data.dptr, data.dsize + 8);
1836                 if (!data.dptr) {
1837                         DEBUG(0,("print_notify_register_pid: Relloc fail for printer %s\n",
1838                                                 printername));
1839                         goto done;
1840                 }
1841                 data.dsize += 8;
1842                 SIVAL(data.dptr,data.dsize - 8,mypid);
1843                 SIVAL(data.dptr,data.dsize - 4,1); /* Refcount. */
1844         }
1845
1846         /* Store back the record. */
1847         if (tdb_store_bystring(tdb, NOTIFY_PID_LIST_KEY, data, TDB_REPLACE) != 0) {
1848                 DEBUG(0,("print_notify_register_pid: Failed to update pid \
1849 list for printer %s\n", printername));
1850                 goto done;
1851         }
1852
1853         ret = True;
1854
1855  done:
1856
1857         tdb_unlock_bystring(tdb, NOTIFY_PID_LIST_KEY);
1858         if (pdb)
1859                 release_print_db(pdb);
1860         SAFE_FREE(data.dptr);
1861         return ret;
1862 }
1863
1864 /****************************************************************************
1865  Update an entry in the print tdb that will allow us to send notify
1866  updates only to interested smbd's.
1867 ****************************************************************************/
1868
1869 bool print_notify_deregister_pid(int snum)
1870 {
1871         TDB_DATA data;
1872         struct tdb_print_db *pdb = NULL;
1873         TDB_CONTEXT *tdb = NULL;
1874         const char *printername;
1875         uint32_t mypid = (uint32_t)getpid();
1876         size_t i;
1877         bool ret = False;
1878
1879         /* if ( snum == -1 ), we are deregister a print server handle
1880            which means to deregister on all print queues */
1881
1882         if (snum == -1)
1883         {
1884                 int num_services = lp_numservices();
1885                 int idx;
1886
1887                 for ( idx=0; idx<num_services; idx++ ) {
1888                         if ( lp_snum_ok(idx) && lp_print_ok(idx) )
1889                                 print_notify_deregister_pid(idx);
1890                 }
1891
1892                 return True;
1893         }
1894         else /* deregister a specific printer */
1895         {
1896                 printername = lp_const_servicename(snum);
1897                 pdb = get_print_db_byname(printername);
1898                 if (!pdb)
1899                         return False;
1900                 tdb = pdb->tdb;
1901         }
1902
1903         if (tdb_lock_bystring_with_timeout(tdb, NOTIFY_PID_LIST_KEY, 10) != 0) {
1904                 DEBUG(0,("print_notify_register_pid: Failed to lock \
1905 printer %s database\n", printername));
1906                 if (pdb)
1907                         release_print_db(pdb);
1908                 return False;
1909         }
1910
1911         data = get_printer_notify_pid_list( tdb, printername, True );
1912
1913         /* Reduce refcount. Remove ourselves if zero. */
1914
1915         for (i = 0; i < data.dsize; ) {
1916                 if (IVAL(data.dptr,i) == mypid) {
1917                         uint32 refcount = IVAL(data.dptr, i+4);
1918
1919                         refcount--;
1920
1921                         if (refcount == 0) {
1922                                 if (data.dsize - i > 8)
1923                                         memmove( &data.dptr[i], &data.dptr[i+8], data.dsize - i - 8);
1924                                 data.dsize -= 8;
1925                                 continue;
1926                         }
1927                         SIVAL(data.dptr, i+4, refcount);
1928                 }
1929
1930                 i += 8;
1931         }
1932
1933         if (data.dsize == 0)
1934                 SAFE_FREE(data.dptr);
1935
1936         /* Store back the record. */
1937         if (tdb_store_bystring(tdb, NOTIFY_PID_LIST_KEY, data, TDB_REPLACE) != 0) {
1938                 DEBUG(0,("print_notify_register_pid: Failed to update pid \
1939 list for printer %s\n", printername));
1940                 goto done;
1941         }
1942
1943         ret = True;
1944
1945   done:
1946
1947         tdb_unlock_bystring(tdb, NOTIFY_PID_LIST_KEY);
1948         if (pdb)
1949                 release_print_db(pdb);
1950         SAFE_FREE(data.dptr);
1951         return ret;
1952 }
1953
1954 /****************************************************************************
1955  Check if a jobid is valid. It is valid if it exists in the database.
1956 ****************************************************************************/
1957
1958 bool print_job_exists(const char* sharename, uint32 jobid)
1959 {
1960         struct tdb_print_db *pdb = get_print_db_byname(sharename);
1961         bool ret;
1962         uint32_t tmp;
1963
1964         if (!pdb)
1965                 return False;
1966         ret = tdb_exists(pdb->tdb, print_key(jobid, &tmp));
1967         release_print_db(pdb);
1968         return ret;
1969 }
1970
1971 /****************************************************************************
1972  Give the filename used for a jobid.
1973  Only valid for the process doing the spooling and when the job
1974  has not been spooled.
1975 ****************************************************************************/
1976
1977 char *print_job_fname(const char* sharename, uint32 jobid)
1978 {
1979         struct printjob *pjob = print_job_find(NULL, sharename, jobid);
1980         if (!pjob || pjob->spooled || pjob->pid != getpid())
1981                 return NULL;
1982         return pjob->filename;
1983 }
1984
1985
1986 /****************************************************************************
1987  Give the filename used for a jobid.
1988  Only valid for the process doing the spooling and when the job
1989  has not been spooled.
1990 ****************************************************************************/
1991
1992 struct spoolss_DeviceMode *print_job_devmode(TALLOC_CTX *mem_ctx,
1993                                              const char *sharename,
1994                                              uint32 jobid)
1995 {
1996         struct printjob *pjob = print_job_find(mem_ctx, sharename, jobid);
1997         if (pjob == NULL) {
1998                 return NULL;
1999         }
2000
2001         return pjob->devmode;
2002 }
2003
2004 /****************************************************************************
2005  Set the name of a job. Only possible for owner.
2006 ****************************************************************************/
2007
2008 bool print_job_set_name(struct tevent_context *ev,
2009                         struct messaging_context *msg_ctx,
2010                         const char *sharename, uint32 jobid, const char *name)
2011 {
2012         struct printjob *pjob;
2013         bool ret;
2014         TALLOC_CTX *tmp_ctx = talloc_new(ev);
2015         if (tmp_ctx == NULL) {
2016                 return false;
2017         }
2018
2019         pjob = print_job_find(tmp_ctx, sharename, jobid);
2020         if (!pjob || pjob->pid != getpid()) {
2021                 ret = false;
2022                 goto err_out;
2023         }
2024
2025         fstrcpy(pjob->jobname, name);
2026         ret = pjob_store(ev, msg_ctx, sharename, jobid, pjob);
2027 err_out:
2028         talloc_free(tmp_ctx);
2029         return ret;
2030 }
2031
2032 /****************************************************************************
2033  Get the name of a job. Only possible for owner.
2034 ****************************************************************************/
2035
2036 bool print_job_get_name(TALLOC_CTX *mem_ctx, const char *sharename, uint32_t jobid, char **name)
2037 {
2038         struct printjob *pjob;
2039
2040         pjob = print_job_find(mem_ctx, sharename, jobid);
2041         if (!pjob || pjob->pid != getpid()) {
2042                 return false;
2043         }
2044
2045         return pjob->jobname;
2046 }
2047
2048
2049 /***************************************************************************
2050  Remove a jobid from the 'jobs added' list.
2051 ***************************************************************************/
2052
2053 static bool remove_from_jobs_added(const char* sharename, uint32 jobid)
2054 {
2055         struct tdb_print_db *pdb = get_print_db_byname(sharename);
2056         TDB_DATA data, key;
2057         size_t job_count, i;
2058         bool ret = False;
2059         bool gotlock = False;
2060
2061         if (!pdb) {
2062                 return False;
2063         }
2064
2065         ZERO_STRUCT(data);
2066
2067         key = string_tdb_data("INFO/jobs_added");
2068
2069         if (tdb_chainlock_with_timeout(pdb->tdb, key, 5) != 0)
2070                 goto out;
2071
2072         gotlock = True;
2073
2074         data = tdb_fetch_compat(pdb->tdb, key);
2075
2076         if (data.dptr == NULL || data.dsize == 0 || (data.dsize % 4 != 0))
2077                 goto out;
2078
2079         job_count = data.dsize / 4;
2080         for (i = 0; i < job_count; i++) {
2081                 uint32 ch_jobid;
2082
2083                 ch_jobid = IVAL(data.dptr, i*4);
2084                 if (ch_jobid == jobid) {
2085                         if (i < job_count -1 )
2086                                 memmove(data.dptr + (i*4), data.dptr + (i*4) + 4, (job_count - i - 1)*4 );
2087                         data.dsize -= 4;
2088                         if (tdb_store(pdb->tdb, key, data, TDB_REPLACE) != 0)
2089                                 goto out;
2090                         break;
2091                 }
2092         }
2093
2094         ret = True;
2095   out:
2096
2097         if (gotlock)
2098                 tdb_chainunlock(pdb->tdb, key);
2099         SAFE_FREE(data.dptr);
2100         release_print_db(pdb);
2101         if (ret)
2102                 DEBUG(10,("remove_from_jobs_added: removed jobid %u\n", (unsigned int)jobid ));
2103         else
2104                 DEBUG(10,("remove_from_jobs_added: Failed to remove jobid %u\n", (unsigned int)jobid ));
2105         return ret;
2106 }
2107
2108 /****************************************************************************
2109  Delete a print job - don't update queue.
2110 ****************************************************************************/
2111
2112 static bool print_job_delete1(struct tevent_context *ev,
2113                               struct messaging_context *msg_ctx,
2114                               int snum, uint32 jobid)
2115 {
2116         const char* sharename = lp_const_servicename(snum);
2117         struct printjob *pjob;
2118         int result = 0;
2119         struct printif *current_printif = get_printer_fns( snum );
2120         bool ret;
2121         TALLOC_CTX *tmp_ctx = talloc_new(ev);
2122         if (tmp_ctx == NULL) {
2123                 return false;
2124         }
2125
2126         pjob = print_job_find(tmp_ctx, sharename, jobid);
2127         if (!pjob) {
2128                 ret = false;
2129                 goto err_out;
2130         }
2131
2132         /*
2133          * If already deleting just return.
2134          */
2135
2136         if (pjob->status == LPQ_DELETING) {
2137                 ret = true;
2138                 goto err_out;
2139         }
2140
2141         /* Hrm - we need to be able to cope with deleting a job before it
2142            has reached the spooler.  Just mark it as LPQ_DELETING and
2143            let the print_queue_update() code rmeove the record */
2144
2145
2146         if (pjob->sysjob == -1) {
2147                 DEBUG(5, ("attempt to delete job %u not seen by lpr\n", (unsigned int)jobid));
2148         }
2149
2150         /* Set the tdb entry to be deleting. */
2151
2152         pjob->status = LPQ_DELETING;
2153         pjob_store(ev, msg_ctx, sharename, jobid, pjob);
2154
2155         if (pjob->spooled && pjob->sysjob != -1)
2156         {
2157                 result = (*(current_printif->job_delete))(
2158                         lp_printername(snum),
2159                         lp_lprmcommand(snum),
2160                         pjob);
2161
2162                 /* Delete the tdb entry if the delete succeeded or the job hasn't
2163                    been spooled. */
2164
2165                 if (result == 0) {
2166                         struct tdb_print_db *pdb = get_print_db_byname(sharename);
2167                         int njobs = 1;
2168
2169                         if (!pdb) {
2170                                 ret = false;
2171                                 goto err_out;
2172                         }
2173                         pjob_delete(ev, msg_ctx, sharename, jobid);
2174                         /* Ensure we keep a rough count of the number of total jobs... */
2175                         tdb_change_int32_atomic(pdb->tdb, "INFO/total_jobs", &njobs, -1);
2176                         release_print_db(pdb);
2177                 }
2178         }
2179
2180         remove_from_jobs_added( sharename, jobid );
2181
2182         ret = (result == 0);
2183 err_out:
2184         talloc_free(tmp_ctx);
2185         return ret;
2186 }
2187
2188 /****************************************************************************
2189  Return true if the current user owns the print job.
2190 ****************************************************************************/
2191
2192 static bool is_owner(const struct auth_session_info *server_info,
2193                      const char *servicename,
2194                      uint32 jobid)
2195 {
2196         struct printjob *pjob;
2197         bool ret;
2198         TALLOC_CTX *tmp_ctx = talloc_new(server_info);
2199         if (tmp_ctx == NULL) {
2200                 return false;
2201         }
2202
2203         pjob = print_job_find(tmp_ctx, servicename, jobid);
2204         if (!pjob || !server_info) {
2205                 ret = false;
2206                 goto err_out;
2207         }
2208
2209         ret = strequal(pjob->user, server_info->unix_info->sanitized_username);
2210 err_out:
2211         talloc_free(tmp_ctx);
2212         return ret;
2213 }
2214
2215 /****************************************************************************
2216  Delete a print job.
2217 ****************************************************************************/
2218
2219 WERROR print_job_delete(const struct auth_session_info *server_info,
2220                         struct messaging_context *msg_ctx,
2221                         int snum, uint32_t jobid)
2222 {
2223         const char* sharename = lp_const_servicename(snum);
2224         struct printjob *pjob;
2225         bool    owner;
2226         WERROR werr;
2227         TALLOC_CTX *tmp_ctx = talloc_new(msg_ctx);
2228         if (tmp_ctx == NULL) {
2229                 return WERR_NOT_ENOUGH_MEMORY;
2230         }
2231
2232         owner = is_owner(server_info, lp_const_servicename(snum), jobid);
2233
2234         /* Check access against security descriptor or whether the user
2235            owns their job. */
2236
2237         if (!owner &&
2238             !print_access_check(server_info, msg_ctx, snum,
2239                                 JOB_ACCESS_ADMINISTER)) {
2240                 DEBUG(3, ("delete denied by security descriptor\n"));
2241
2242                 /* BEGIN_ADMIN_LOG */
2243                 sys_adminlog( LOG_ERR,
2244                               "Permission denied-- user not allowed to delete, \
2245 pause, or resume print job. User name: %s. Printer name: %s.",
2246                               uidtoname(server_info->unix_token->uid),
2247                               lp_printername(snum) );
2248                 /* END_ADMIN_LOG */
2249
2250                 werr = WERR_ACCESS_DENIED;
2251                 goto err_out;
2252         }
2253
2254         /*
2255          * get the spooled filename of the print job
2256          * if this works, then the file has not been spooled
2257          * to the underlying print system.  Just delete the
2258          * spool file & return.
2259          */
2260
2261         pjob = print_job_find(tmp_ctx, sharename, jobid);
2262         if (!pjob || pjob->spooled || pjob->pid != getpid()) {
2263                 DEBUG(10, ("Skipping spool file removal for job %u\n", jobid));
2264         } else {
2265                 DEBUG(10, ("Removing spool file [%s]\n", pjob->filename));
2266                 if (unlink(pjob->filename) == -1) {
2267                         werr = map_werror_from_unix(errno);
2268                         goto err_out;
2269                 }
2270         }
2271
2272         if (!print_job_delete1(server_event_context(), msg_ctx, snum, jobid)) {
2273                 werr = WERR_ACCESS_DENIED;
2274                 goto err_out;
2275         }
2276
2277         /* force update the database and say the delete failed if the
2278            job still exists */
2279
2280         print_queue_update(msg_ctx, snum, True);
2281
2282         pjob = print_job_find(tmp_ctx, sharename, jobid);
2283         if (pjob && (pjob->status != LPQ_DELETING)) {
2284                 werr = WERR_ACCESS_DENIED;
2285                 goto err_out;
2286         }
2287         werr = WERR_PRINTER_HAS_JOBS_QUEUED;
2288
2289 err_out:
2290         talloc_free(tmp_ctx);
2291         return werr;
2292 }
2293
2294 /****************************************************************************
2295  Pause a job.
2296 ****************************************************************************/
2297
2298 WERROR print_job_pause(const struct auth_session_info *server_info,
2299                      struct messaging_context *msg_ctx,
2300                      int snum, uint32 jobid)
2301 {
2302         const char* sharename = lp_const_servicename(snum);
2303         struct printjob *pjob;
2304         int ret = -1;
2305         struct printif *current_printif = get_printer_fns( snum );
2306         WERROR werr;
2307         TALLOC_CTX *tmp_ctx = talloc_new(msg_ctx);
2308         if (tmp_ctx == NULL) {
2309                 return WERR_NOT_ENOUGH_MEMORY;
2310         }
2311
2312         pjob = print_job_find(tmp_ctx, sharename, jobid);
2313         if (!pjob || !server_info) {
2314                 DEBUG(10, ("print_job_pause: no pjob or user for jobid %u\n",
2315                         (unsigned int)jobid ));
2316                 werr = WERR_INVALID_PARAM;
2317                 goto err_out;
2318         }
2319
2320         if (!pjob->spooled || pjob->sysjob == -1) {
2321                 DEBUG(10, ("print_job_pause: not spooled or bad sysjob = %d for jobid %u\n",
2322                         (int)pjob->sysjob, (unsigned int)jobid ));
2323                 werr = WERR_INVALID_PARAM;
2324                 goto err_out;
2325         }
2326
2327         if (!is_owner(server_info, lp_const_servicename(snum), jobid) &&
2328             !print_access_check(server_info, msg_ctx, snum,
2329                                 JOB_ACCESS_ADMINISTER)) {
2330                 DEBUG(3, ("pause denied by security descriptor\n"));
2331
2332                 /* BEGIN_ADMIN_LOG */
2333                 sys_adminlog( LOG_ERR,
2334                         "Permission denied-- user not allowed to delete, \
2335 pause, or resume print job. User name: %s. Printer name: %s.",
2336                               uidtoname(server_info->unix_token->uid),
2337                               lp_printername(snum) );
2338                 /* END_ADMIN_LOG */
2339
2340                 werr = WERR_ACCESS_DENIED;
2341                 goto err_out;
2342         }
2343
2344         /* need to pause the spooled entry */
2345         ret = (*(current_printif->job_pause))(snum, pjob);
2346
2347         if (ret != 0) {
2348                 werr = WERR_INVALID_PARAM;
2349                 goto err_out;
2350         }
2351
2352         /* force update the database */
2353         print_cache_flush(lp_const_servicename(snum));
2354
2355         /* Send a printer notify message */
2356
2357         notify_job_status(server_event_context(), msg_ctx, sharename, jobid,
2358                           JOB_STATUS_PAUSED);
2359
2360         /* how do we tell if this succeeded? */
2361         werr = WERR_OK;
2362 err_out:
2363         talloc_free(tmp_ctx);
2364         return werr;
2365 }
2366
2367 /****************************************************************************
2368  Resume a job.
2369 ****************************************************************************/
2370
2371 WERROR print_job_resume(const struct auth_session_info *server_info,
2372                       struct messaging_context *msg_ctx,
2373                       int snum, uint32 jobid)
2374 {
2375         const char *sharename = lp_const_servicename(snum);
2376         struct printjob *pjob;
2377         int ret;
2378         struct printif *current_printif = get_printer_fns( snum );
2379         WERROR werr;
2380         TALLOC_CTX *tmp_ctx = talloc_new(msg_ctx);
2381         if (tmp_ctx == NULL)
2382                 return WERR_NOT_ENOUGH_MEMORY;
2383
2384         pjob = print_job_find(tmp_ctx, sharename, jobid);
2385         if (!pjob || !server_info) {
2386                 DEBUG(10, ("print_job_resume: no pjob or user for jobid %u\n",
2387                         (unsigned int)jobid ));
2388                 werr = WERR_INVALID_PARAM;
2389                 goto err_out;
2390         }
2391
2392         if (!pjob->spooled || pjob->sysjob == -1) {
2393                 DEBUG(10, ("print_job_resume: not spooled or bad sysjob = %d for jobid %u\n",
2394                         (int)pjob->sysjob, (unsigned int)jobid ));
2395                 werr = WERR_INVALID_PARAM;
2396                 goto err_out;
2397         }
2398
2399         if (!is_owner(server_info, lp_const_servicename(snum), jobid) &&
2400             !print_access_check(server_info, msg_ctx, snum,
2401                                 JOB_ACCESS_ADMINISTER)) {
2402                 DEBUG(3, ("resume denied by security descriptor\n"));
2403
2404                 /* BEGIN_ADMIN_LOG */
2405                 sys_adminlog( LOG_ERR,
2406                          "Permission denied-- user not allowed to delete, \
2407 pause, or resume print job. User name: %s. Printer name: %s.",
2408                               uidtoname(server_info->unix_token->uid),
2409                               lp_printername(snum) );
2410                 /* END_ADMIN_LOG */
2411                 werr = WERR_ACCESS_DENIED;
2412                 goto err_out;
2413         }
2414
2415         ret = (*(current_printif->job_resume))(snum, pjob);
2416
2417         if (ret != 0) {
2418                 werr = WERR_INVALID_PARAM;
2419                 goto err_out;
2420         }
2421
2422         /* force update the database */
2423         print_cache_flush(lp_const_servicename(snum));
2424
2425         /* Send a printer notify message */
2426
2427         notify_job_status(server_event_context(), msg_ctx, sharename, jobid,
2428                           JOB_STATUS_QUEUED);
2429
2430         werr = WERR_OK;
2431 err_out:
2432         talloc_free(tmp_ctx);
2433         return werr;
2434 }
2435
2436 /****************************************************************************
2437  Write to a print file.
2438 ****************************************************************************/
2439
2440 ssize_t print_job_write(struct tevent_context *ev,
2441                         struct messaging_context *msg_ctx,
2442                         int snum, uint32 jobid, const char *buf, size_t size)
2443 {
2444         const char* sharename = lp_const_servicename(snum);
2445         ssize_t return_code;
2446         struct printjob *pjob;
2447         TALLOC_CTX *tmp_ctx = talloc_new(ev);
2448         if (tmp_ctx == NULL) {
2449                 return -1;
2450         }
2451
2452         pjob = print_job_find(tmp_ctx, sharename, jobid);
2453         if (!pjob) {
2454                 return_code = -1;
2455                 goto err_out;
2456         }
2457
2458         /* don't allow another process to get this info - it is meaningless */
2459         if (pjob->pid != getpid()) {
2460                 return_code = -1;
2461                 goto err_out;
2462         }
2463
2464         /* if SMBD is spooling this can't be allowed */
2465         if (pjob->status == PJOB_SMBD_SPOOLING) {
2466                 return_code = -1;
2467                 goto err_out;
2468         }
2469
2470         return_code = write_data(pjob->fd, buf, size);
2471         if (return_code > 0) {
2472                 pjob->size += size;
2473                 pjob_store(ev, msg_ctx, sharename, jobid, pjob);
2474         }
2475 err_out:
2476         talloc_free(tmp_ctx);
2477         return return_code;
2478 }
2479
2480 /****************************************************************************
2481  Get the queue status - do not update if db is out of date.
2482 ****************************************************************************/
2483
2484 static int get_queue_status(const char* sharename, print_status_struct *status)
2485 {
2486         fstring keystr;
2487         TDB_DATA data;
2488         struct tdb_print_db *pdb = get_print_db_byname(sharename);
2489         int len;
2490
2491         if (status) {
2492                 ZERO_STRUCTP(status);
2493         }
2494
2495         if (!pdb)
2496                 return 0;
2497
2498         if (status) {
2499                 fstr_sprintf(keystr, "STATUS/%s", sharename);
2500                 data = tdb_fetch_compat(pdb->tdb, string_tdb_data(keystr));
2501                 if (data.dptr) {
2502                         if (data.dsize == sizeof(print_status_struct))
2503                                 /* this memcpy is ok since the status struct was
2504                                    not packed before storing it in the tdb */
2505                                 memcpy(status, data.dptr, sizeof(print_status_struct));
2506                         SAFE_FREE(data.dptr);
2507                 }
2508         }
2509         len = tdb_fetch_int32(pdb->tdb, "INFO/total_jobs");
2510         release_print_db(pdb);
2511         return (len == -1 ? 0 : len);
2512 }
2513
2514 /****************************************************************************
2515  Determine the number of jobs in a queue.
2516 ****************************************************************************/
2517
2518 int print_queue_length(struct messaging_context *msg_ctx, int snum,
2519                        print_status_struct *pstatus)
2520 {
2521         const char* sharename = lp_const_servicename( snum );
2522         print_status_struct status;
2523         int len;
2524
2525         ZERO_STRUCT( status );
2526
2527         /* make sure the database is up to date */
2528         if (print_cache_expired(lp_const_servicename(snum), True))
2529                 print_queue_update(msg_ctx, snum, False);
2530
2531         /* also fetch the queue status */
2532         memset(&status, 0, sizeof(status));
2533         len = get_queue_status(sharename, &status);
2534
2535         if (pstatus)
2536                 *pstatus = status;
2537
2538         return len;
2539 }
2540
2541 /***************************************************************************
2542  Allocate a jobid. Hold the lock for as short a time as possible.
2543 ***************************************************************************/
2544
2545 static WERROR allocate_print_jobid(struct tdb_print_db *pdb, int snum,
2546                                    const char *sharename, uint32 *pjobid)
2547 {
2548         int i;
2549         uint32 jobid;
2550         enum TDB_ERROR terr;
2551         int ret;
2552
2553         *pjobid = (uint32)-1;
2554
2555         for (i = 0; i < 3; i++) {
2556                 /* Lock the database - only wait 20 seconds. */
2557                 ret = tdb_lock_bystring_with_timeout(pdb->tdb,
2558                                                      "INFO/nextjob", 20);
2559                 if (ret != 0) {
2560                         DEBUG(0, ("allocate_print_jobid: "
2561                                   "Failed to lock printing database %s\n",
2562                                   sharename));
2563                         terr = tdb_error(pdb->tdb);
2564                         return ntstatus_to_werror(map_nt_error_from_tdb(terr));
2565                 }
2566
2567                 if (!tdb_fetch_uint32(pdb->tdb, "INFO/nextjob", &jobid)) {
2568                         terr = tdb_error(pdb->tdb);
2569                         if (terr != TDB_ERR_NOEXIST) {
2570                                 DEBUG(0, ("allocate_print_jobid: "
2571                                           "Failed to fetch INFO/nextjob "
2572                                           "for print queue %s\n", sharename));
2573                                 tdb_unlock_bystring(pdb->tdb, "INFO/nextjob");
2574                                 return ntstatus_to_werror(map_nt_error_from_tdb(terr));
2575                         }
2576                         DEBUG(10, ("allocate_print_jobid: "
2577                                    "No existing jobid in %s\n", sharename));
2578                         jobid = 0;
2579                 }
2580
2581                 DEBUG(10, ("allocate_print_jobid: "
2582                            "Read jobid %u from %s\n", jobid, sharename));
2583
2584                 jobid = NEXT_JOBID(jobid);
2585
2586                 ret = tdb_store_int32(pdb->tdb, "INFO/nextjob", jobid);
2587                 if (ret != 0) {
2588                         terr = tdb_error(pdb->tdb);
2589                         DEBUG(3, ("allocate_print_jobid: "
2590                                   "Failed to store INFO/nextjob.\n"));
2591                         tdb_unlock_bystring(pdb->tdb, "INFO/nextjob");
2592                         return ntstatus_to_werror(map_nt_error_from_tdb(terr));
2593                 }
2594
2595                 /* We've finished with the INFO/nextjob lock. */
2596                 tdb_unlock_bystring(pdb->tdb, "INFO/nextjob");
2597
2598                 if (!print_job_exists(sharename, jobid)) {
2599                         break;
2600                 }
2601                 DEBUG(10, ("allocate_print_jobid: "
2602                            "Found jobid %u in %s\n", jobid, sharename));
2603         }
2604
2605         if (i > 2) {
2606                 DEBUG(0, ("allocate_print_jobid: "
2607                           "Failed to allocate a print job for queue %s\n",
2608                           sharename));
2609                 /* Probably full... */
2610                 return WERR_NO_SPOOL_SPACE;
2611         }
2612
2613         /* Store a dummy placeholder. */
2614         {
2615                 uint32_t tmp;
2616                 TDB_DATA dum;
2617                 dum.dptr = NULL;
2618                 dum.dsize = 0;
2619                 if (tdb_store(pdb->tdb, print_key(jobid, &tmp), dum,
2620                               TDB_INSERT) != 0) {
2621                         DEBUG(3, ("allocate_print_jobid: "
2622                                   "jobid (%d) failed to store placeholder.\n",
2623                                   jobid ));
2624                         terr = tdb_error(pdb->tdb);
2625                         return ntstatus_to_werror(map_nt_error_from_tdb(terr));
2626                 }
2627         }
2628
2629         *pjobid = jobid;
2630         return WERR_OK;
2631 }
2632
2633 /***************************************************************************
2634  Append a jobid to the 'jobs added' list.
2635 ***************************************************************************/
2636
2637 static bool add_to_jobs_added(struct tdb_print_db *pdb, uint32 jobid)
2638 {
2639         TDB_DATA data;
2640         uint32 store_jobid;
2641
2642         SIVAL(&store_jobid, 0, jobid);
2643         data.dptr = (uint8 *)&store_jobid;
2644         data.dsize = 4;
2645
2646         DEBUG(10,("add_to_jobs_added: Added jobid %u\n", (unsigned int)jobid ));
2647
2648         return (tdb_append(pdb->tdb, string_tdb_data("INFO/jobs_added"),
2649                            data) == 0);
2650 }
2651
2652
2653 /***************************************************************************
2654  Do all checks needed to determine if we can start a job.
2655 ***************************************************************************/
2656
2657 static WERROR print_job_checks(const struct auth_session_info *server_info,
2658                                struct messaging_context *msg_ctx,
2659                                int snum, int *njobs)
2660 {
2661         const char *sharename = lp_const_servicename(snum);
2662         uint64_t dspace, dsize;
2663         uint64_t minspace;
2664         int ret;
2665
2666         if (!print_access_check(server_info, msg_ctx, snum,
2667                                 PRINTER_ACCESS_USE)) {
2668                 DEBUG(3, ("print_job_checks: "
2669                           "job start denied by security descriptor\n"));
2670                 return WERR_ACCESS_DENIED;
2671         }
2672
2673         if (!print_time_access_check(server_info, msg_ctx, sharename)) {
2674                 DEBUG(3, ("print_job_checks: "
2675                           "job start denied by time check\n"));
2676                 return WERR_ACCESS_DENIED;
2677         }
2678
2679         /* see if we have sufficient disk space */
2680         if (lp_minprintspace(snum)) {
2681                 minspace = lp_minprintspace(snum);
2682                 ret = sys_fsusage(lp_pathname(snum), &dspace, &dsize);
2683                 if (ret == 0 && dspace < 2*minspace) {
2684                         DEBUG(3, ("print_job_checks: "
2685                                   "disk space check failed.\n"));
2686                         return WERR_NO_SPOOL_SPACE;
2687                 }
2688         }
2689
2690         /* for autoloaded printers, check that the printcap entry still exists */
2691         if (lp_autoloaded(snum) && !pcap_printername_ok(sharename)) {
2692                 DEBUG(3, ("print_job_checks: printer name %s check failed.\n",
2693                           sharename));
2694                 return WERR_ACCESS_DENIED;
2695         }
2696
2697         /* Insure the maximum queue size is not violated */
2698         *njobs = print_queue_length(msg_ctx, snum, NULL);
2699         if (*njobs > lp_maxprintjobs(snum)) {
2700                 DEBUG(3, ("print_job_checks: Queue %s number of jobs (%d) "
2701                           "larger than max printjobs per queue (%d).\n",
2702                           sharename, *njobs, lp_maxprintjobs(snum)));
2703                 return WERR_NO_SPOOL_SPACE;
2704         }
2705
2706         return WERR_OK;
2707 }
2708
2709 /***************************************************************************
2710  Create a job file.
2711 ***************************************************************************/
2712
2713 static WERROR print_job_spool_file(int snum, uint32_t jobid,
2714                                    const char *output_file,
2715                                    struct printjob *pjob)
2716 {
2717         WERROR werr;
2718         SMB_STRUCT_STAT st;
2719         const char *path;
2720         int len;
2721
2722         /* if this file is within the printer path, it means that smbd
2723          * is spooling it and will pass us control when it is finished.
2724          * Verify that the file name is ok, within path, and it is
2725          * already already there */
2726         if (output_file) {
2727                 path = lp_pathname(snum);
2728                 len = strlen(path);
2729                 if (strncmp(output_file, path, len) == 0 &&
2730                     (output_file[len - 1] == '/' || output_file[len] == '/')) {
2731
2732                         /* verify path is not too long */
2733                         if (strlen(output_file) >= sizeof(pjob->filename)) {
2734                                 return WERR_INVALID_NAME;
2735                         }
2736
2737                         /* verify that the file exists */
2738                         if (sys_stat(output_file, &st, false) != 0) {
2739                                 return WERR_INVALID_NAME;
2740                         }
2741
2742                         fstrcpy(pjob->filename, output_file);
2743
2744                         DEBUG(3, ("print_job_spool_file:"
2745                                   "External spooling activated"));
2746
2747                         /* we do not open the file until spooling is done */
2748                         pjob->fd = -1;
2749                         pjob->status = PJOB_SMBD_SPOOLING;
2750
2751                         return WERR_OK;
2752                 }
2753         }
2754
2755         slprintf(pjob->filename, sizeof(pjob->filename)-1,
2756                  "%s/%s%.8u.XXXXXX", lp_pathname(snum),
2757                  PRINT_SPOOL_PREFIX, (unsigned int)jobid);
2758         pjob->fd = mkstemp(pjob->filename);
2759
2760         if (pjob->fd == -1) {
2761                 werr = map_werror_from_unix(errno);
2762                 if (W_ERROR_EQUAL(werr, WERR_ACCESS_DENIED)) {
2763                         /* Common setup error, force a report. */
2764                         DEBUG(0, ("print_job_spool_file: "
2765                                   "insufficient permissions to open spool "
2766                                   "file %s.\n", pjob->filename));
2767                 } else {
2768                         /* Normal case, report at level 3 and above. */
2769                         DEBUG(3, ("print_job_spool_file: "
2770                                   "can't open spool file %s\n",
2771                                   pjob->filename));
2772                 }
2773                 return werr;
2774         }
2775
2776         return WERR_OK;
2777 }
2778
2779 /***************************************************************************
2780  Start spooling a job - return the jobid.
2781 ***************************************************************************/
2782
2783 WERROR print_job_start(const struct auth_session_info *server_info,
2784                        struct messaging_context *msg_ctx,
2785                        const char *clientmachine,
2786                        int snum, const char *docname, const char *filename,
2787                        struct spoolss_DeviceMode *devmode, uint32_t *_jobid)
2788 {
2789         uint32_t jobid;
2790         char *path;
2791         struct printjob pjob;
2792         const char *sharename = lp_const_servicename(snum);
2793         struct tdb_print_db *pdb = get_print_db_byname(sharename);
2794         int njobs;
2795         WERROR werr;
2796
2797         if (!pdb) {
2798                 return WERR_INTERNAL_DB_CORRUPTION;
2799         }
2800
2801         path = lp_pathname(snum);
2802
2803         werr = print_job_checks(server_info, msg_ctx, snum, &njobs);
2804         if (!W_ERROR_IS_OK(werr)) {
2805                 release_print_db(pdb);
2806                 return werr;
2807         }
2808
2809         DEBUG(10, ("print_job_start: "
2810                    "Queue %s number of jobs (%d), max printjobs = %d\n",
2811                    sharename, njobs, lp_maxprintjobs(snum)));
2812
2813         werr = allocate_print_jobid(pdb, snum, sharename, &jobid);
2814         if (!W_ERROR_IS_OK(werr)) {
2815                 goto fail;
2816         }
2817
2818         /* create the database entry */
2819
2820         ZERO_STRUCT(pjob);
2821
2822         pjob.pid = getpid();
2823         pjob.jobid = jobid;
2824         pjob.sysjob = -1;
2825         pjob.fd = -1;
2826         pjob.starttime = time(NULL);
2827         pjob.status = LPQ_SPOOLING;
2828         pjob.size = 0;
2829         pjob.spooled = False;
2830         pjob.smbjob = True;
2831         pjob.devmode = devmode;
2832
2833         fstrcpy(pjob.jobname, docname);
2834
2835         fstrcpy(pjob.clientmachine, clientmachine);
2836
2837         fstrcpy(pjob.user, lp_printjob_username(snum));
2838         standard_sub_advanced(sharename, server_info->unix_info->sanitized_username,
2839                               path, server_info->unix_token->gid,
2840                               server_info->unix_info->sanitized_username,
2841                               server_info->info->domain_name,
2842                               pjob.user, sizeof(pjob.user));
2843
2844         fstrcpy(pjob.queuename, lp_const_servicename(snum));
2845
2846         /* we have a job entry - now create the spool file */
2847         werr = print_job_spool_file(snum, jobid, filename, &pjob);
2848         if (!W_ERROR_IS_OK(werr)) {
2849                 goto fail;
2850         }
2851
2852         pjob_store(server_event_context(), msg_ctx, sharename, jobid, &pjob);
2853
2854         /* Update the 'jobs added' entry used by print_queue_status. */
2855         add_to_jobs_added(pdb, jobid);
2856
2857         /* Ensure we keep a rough count of the number of total jobs... */
2858         tdb_change_int32_atomic(pdb->tdb, "INFO/total_jobs", &njobs, 1);
2859
2860         release_print_db(pdb);
2861
2862         *_jobid = jobid;
2863         return WERR_OK;
2864
2865 fail:
2866         if (jobid != -1) {
2867                 pjob_delete(server_event_context(), msg_ctx, sharename, jobid);
2868         }
2869
2870         release_print_db(pdb);
2871
2872         DEBUG(3, ("print_job_start: returning fail. "
2873                   "Error = %s\n", win_errstr(werr)));
2874         return werr;
2875 }
2876
2877 /****************************************************************************
2878  Update the number of pages spooled to jobid
2879 ****************************************************************************/
2880
2881 void print_job_endpage(struct messaging_context *msg_ctx,
2882                        int snum, uint32 jobid)
2883 {
2884         const char* sharename = lp_const_servicename(snum);
2885         struct printjob *pjob;
2886         TALLOC_CTX *tmp_ctx = talloc_new(msg_ctx);
2887         if (tmp_ctx == NULL) {
2888                 return;
2889         }
2890
2891         pjob = print_job_find(tmp_ctx, sharename, jobid);
2892         if (!pjob) {
2893                 goto err_out;
2894         }
2895         /* don't allow another process to get this info - it is meaningless */
2896         if (pjob->pid != getpid()) {
2897                 goto err_out;
2898         }
2899
2900         pjob->page_count++;
2901         pjob_store(server_event_context(), msg_ctx, sharename, jobid, pjob);
2902 err_out:
2903         talloc_free(tmp_ctx);
2904 }
2905
2906 /****************************************************************************
2907  Print a file - called on closing the file. This spools the job.
2908  If normal close is false then we're tearing down the jobs - treat as an
2909  error.
2910 ****************************************************************************/
2911
2912 NTSTATUS print_job_end(struct messaging_context *msg_ctx, int snum,
2913                        uint32 jobid, enum file_close_type close_type)
2914 {
2915         const char* sharename = lp_const_servicename(snum);
2916         struct printjob *pjob;
2917         int ret;
2918         SMB_STRUCT_STAT sbuf;
2919         struct printif *current_printif = get_printer_fns(snum);
2920         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
2921         TALLOC_CTX *tmp_ctx = talloc_new(msg_ctx);
2922         if (tmp_ctx == NULL) {
2923                 return NT_STATUS_NO_MEMORY;
2924         }
2925
2926         pjob = print_job_find(tmp_ctx, sharename, jobid);
2927         if (!pjob) {
2928                 status = NT_STATUS_PRINT_CANCELLED;
2929                 goto err_out;
2930         }
2931
2932         if (pjob->spooled || pjob->pid != getpid()) {
2933                 status = NT_STATUS_ACCESS_DENIED;
2934                 goto err_out;
2935         }
2936
2937         if (close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) {
2938                 if (pjob->status == PJOB_SMBD_SPOOLING) {
2939                         /* take over the file now, smbd is done */
2940                         if (sys_stat(pjob->filename, &sbuf, false) != 0) {
2941                                 status = map_nt_error_from_unix(errno);
2942                                 DEBUG(3, ("print_job_end: "
2943                                           "stat file failed for jobid %d\n",
2944                                           jobid));
2945                                 goto fail;
2946                         }
2947
2948                         pjob->status = LPQ_SPOOLING;
2949
2950                 } else {
2951
2952                         if ((sys_fstat(pjob->fd, &sbuf, false) != 0)) {
2953                                 status = map_nt_error_from_unix(errno);
2954                                 close(pjob->fd);
2955                                 DEBUG(3, ("print_job_end: "
2956                                           "stat file failed for jobid %d\n",
2957                                           jobid));
2958                                 goto fail;
2959                         }
2960
2961                         close(pjob->fd);
2962                 }
2963
2964                 pjob->size = sbuf.st_ex_size;
2965         } else {
2966
2967                 /*
2968                  * Not a normal close, something has gone wrong. Cleanup.
2969                  */
2970                 if (pjob->fd != -1) {
2971                         close(pjob->fd);
2972                 }
2973                 goto fail;
2974         }
2975
2976         /* Technically, this is not quite right. If the printer has a separator
2977          * page turned on, the NT spooler prints the separator page even if the
2978          * print job is 0 bytes. 010215 JRR */
2979         if (pjob->size == 0 || pjob->status == LPQ_DELETING) {
2980                 /* don't bother spooling empty files or something being deleted. */
2981                 DEBUG(5,("print_job_end: canceling spool of %s (%s)\n",
2982                         pjob->filename, pjob->size ? "deleted" : "zero length" ));
2983                 unlink(pjob->filename);
2984                 pjob_delete(server_event_context(), msg_ctx, sharename, jobid);
2985                 return NT_STATUS_OK;
2986         }
2987
2988         ret = (*(current_printif->job_submit))(snum, pjob);
2989
2990         if (ret) {
2991                 status = NT_STATUS_PRINT_CANCELLED;
2992                 goto fail;
2993         }
2994
2995         /* The print job has been successfully handed over to the back-end */
2996
2997         pjob->spooled = True;
2998         pjob->status = LPQ_QUEUED;
2999         pjob_store(server_event_context(), msg_ctx, sharename, jobid, pjob);
3000
3001         /* make sure the database is up to date */
3002         if (print_cache_expired(lp_const_servicename(snum), True))
3003                 print_queue_update(msg_ctx, snum, False);
3004
3005         return NT_STATUS_OK;
3006
3007 fail:
3008
3009         /* The print job was not successfully started. Cleanup */
3010         /* Still need to add proper error return propagation! 010122:JRR */
3011         pjob->fd = -1;
3012         unlink(pjob->filename);
3013         pjob_delete(server_event_context(), msg_ctx, sharename, jobid);
3014 err_out:
3015         talloc_free(tmp_ctx);
3016         return status;
3017 }
3018
3019 /****************************************************************************
3020  Get a snapshot of jobs in the system without traversing.
3021 ****************************************************************************/
3022
3023 static bool get_stored_queue_info(struct messaging_context *msg_ctx,
3024                                   struct tdb_print_db *pdb, int snum,
3025                                   int *pcount, print_queue_struct **ppqueue)
3026 {
3027         TDB_DATA data, cgdata, jcdata;
3028         print_queue_struct *queue = NULL;
3029         uint32 qcount = 0;
3030         uint32 extra_count = 0;
3031         uint32_t changed_count = 0;
3032         int total_count = 0;
3033         size_t len = 0;
3034         uint32 i;
3035         int max_reported_jobs = lp_max_reported_jobs(snum);
3036         bool ret = False;
3037         const char* sharename = lp_servicename(snum);
3038         TALLOC_CTX *tmp_ctx = talloc_new(msg_ctx);
3039         if (tmp_ctx == NULL) {
3040                 return false;
3041         }
3042
3043         /* make sure the database is up to date */
3044         if (print_cache_expired(lp_const_servicename(snum), True))
3045                 print_queue_update(msg_ctx, snum, False);
3046
3047         *pcount = 0;
3048         *ppqueue = NULL;
3049
3050         ZERO_STRUCT(data);
3051         ZERO_STRUCT(cgdata);
3052
3053         /* Get the stored queue data. */
3054         data = tdb_fetch_compat(pdb->tdb, string_tdb_data("INFO/linear_queue_array"));
3055
3056         if (data.dptr && data.dsize >= sizeof(qcount))
3057                 len += tdb_unpack(data.dptr + len, data.dsize - len, "d", &qcount);
3058
3059         /* Get the added jobs list. */
3060         cgdata = tdb_fetch_compat(pdb->tdb, string_tdb_data("INFO/jobs_added"));
3061         if (cgdata.dptr != NULL && (cgdata.dsize % 4 == 0))
3062                 extra_count = cgdata.dsize/4;
3063
3064         /* Get the changed jobs list. */
3065         jcdata = tdb_fetch_compat(pdb->tdb, string_tdb_data("INFO/jobs_changed"));
3066         if (jcdata.dptr != NULL && (jcdata.dsize % 4 == 0))
3067                 changed_count = jcdata.dsize / 4;
3068
3069         DEBUG(5,("get_stored_queue_info: qcount = %u, extra_count = %u\n", (unsigned int)qcount, (unsigned int)extra_count));
3070
3071         /* Allocate the queue size. */
3072         if (qcount == 0 && extra_count == 0)
3073                 goto out;
3074
3075         if ((queue = SMB_MALLOC_ARRAY(print_queue_struct, qcount + extra_count)) == NULL)
3076                 goto out;
3077
3078         /* Retrieve the linearised queue data. */
3079
3080         for( i  = 0; i < qcount; i++) {
3081                 uint32 qjob, qsize, qpage_count, qstatus, qpriority, qtime;
3082                 len += tdb_unpack(data.dptr + len, data.dsize - len, "ddddddff",
3083                                 &qjob,
3084                                 &qsize,
3085                                 &qpage_count,
3086                                 &qstatus,
3087                                 &qpriority,
3088                                 &qtime,
3089                                 queue[i].fs_user,
3090                                 queue[i].fs_file);
3091                 queue[i].sysjob = qjob;
3092                 queue[i].size = qsize;
3093                 queue[i].page_count = qpage_count;
3094                 queue[i].status = qstatus;
3095                 queue[i].priority = qpriority;
3096                 queue[i].time = qtime;
3097         }
3098
3099         total_count = qcount;
3100
3101         /* Add new jobids to the queue. */
3102         for( i  = 0; i < extra_count; i++) {
3103                 uint32 jobid;
3104                 struct printjob *pjob;
3105
3106                 jobid = IVAL(cgdata.dptr, i*4);
3107                 DEBUG(5,("get_stored_queue_info: added job = %u\n", (unsigned int)jobid));
3108                 pjob = print_job_find(tmp_ctx, lp_const_servicename(snum), jobid);
3109                 if (!pjob) {
3110                         DEBUG(5,("get_stored_queue_info: failed to find added job = %u\n", (unsigned int)jobid));
3111                         remove_from_jobs_added(sharename, jobid);
3112                         continue;
3113                 }
3114
3115                 queue[total_count].sysjob = jobid;
3116                 queue[total_count].size = pjob->size;
3117                 queue[total_count].page_count = pjob->page_count;
3118                 queue[total_count].status = pjob->status;
3119                 queue[total_count].priority = 1;
3120                 queue[total_count].time = pjob->starttime;
3121                 fstrcpy(queue[total_count].fs_user, pjob->user);
3122                 fstrcpy(queue[total_count].fs_file, pjob->jobname);
3123                 total_count++;
3124                 talloc_free(pjob);
3125         }
3126
3127         /* Update the changed jobids. */
3128         for (i = 0; i < changed_count; i++) {
3129                 uint32_t jobid = IVAL(jcdata.dptr, i * 4);
3130                 uint32_t j;
3131                 bool found = false;
3132
3133                 for (j = 0; j < total_count; j++) {
3134                         if (queue[j].sysjob == jobid) {
3135                                 found = true;
3136                                 break;
3137                         }
3138                 }
3139
3140                 if (found) {
3141                         struct printjob *pjob;
3142
3143                         DEBUG(5,("get_stored_queue_info: changed job: %u\n",
3144                                  (unsigned int) jobid));
3145
3146                         pjob = print_job_find(tmp_ctx, sharename, jobid);
3147                         if (pjob == NULL) {
3148                                 DEBUG(5,("get_stored_queue_info: failed to find "
3149                                          "changed job = %u\n",
3150                                          (unsigned int) jobid));
3151                                 remove_from_jobs_changed(sharename, jobid);
3152                                 continue;
3153                         }
3154
3155                         queue[j].sysjob = jobid;
3156                         queue[j].size = pjob->size;
3157                         queue[j].page_count = pjob->page_count;
3158                         queue[j].status = pjob->status;
3159                         queue[j].priority = 1;
3160                         queue[j].time = pjob->starttime;
3161                         fstrcpy(queue[j].fs_user, pjob->user);
3162                         fstrcpy(queue[j].fs_file, pjob->jobname);
3163                         talloc_free(pjob);
3164
3165                         DEBUG(5,("get_stored_queue_info: updated queue[%u], jobid: %u, jobname: %s\n",
3166                                  (unsigned int) j, (unsigned int) jobid, pjob->jobname));
3167                 }
3168
3169                 remove_from_jobs_changed(sharename, jobid);
3170         }
3171
3172         /* Sort the queue by submission time otherwise they are displayed
3173            in hash order. */
3174
3175         TYPESAFE_QSORT(queue, total_count, printjob_comp);
3176
3177         DEBUG(5,("get_stored_queue_info: total_count = %u\n", (unsigned int)total_count));
3178
3179         if (max_reported_jobs && total_count > max_reported_jobs)
3180                 total_count = max_reported_jobs;
3181
3182         *ppqueue = queue;
3183         *pcount = total_count;
3184
3185         ret = True;
3186
3187   out:
3188
3189         SAFE_FREE(data.dptr);
3190         SAFE_FREE(cgdata.dptr);
3191         talloc_free(tmp_ctx);
3192         return ret;
3193 }
3194
3195 /****************************************************************************
3196  Get a printer queue listing.
3197  set queue = NULL and status = NULL if you just want to update the cache
3198 ****************************************************************************/
3199
3200 int print_queue_status(struct messaging_context *msg_ctx, int snum,
3201                        print_queue_struct **ppqueue,
3202                        print_status_struct *status)
3203 {
3204         fstring keystr;
3205         TDB_DATA data, key;
3206         const char *sharename;
3207         struct tdb_print_db *pdb;
3208         int count = 0;
3209
3210         /* make sure the database is up to date */
3211
3212         if (print_cache_expired(lp_const_servicename(snum), True))
3213                 print_queue_update(msg_ctx, snum, False);
3214
3215         /* return if we are done */
3216         if ( !ppqueue || !status )
3217                 return 0;
3218
3219         *ppqueue = NULL;
3220         sharename = lp_const_servicename(snum);
3221         pdb = get_print_db_byname(sharename);
3222
3223         if (!pdb)
3224                 return 0;
3225
3226         /*
3227          * Fetch the queue status.  We must do this first, as there may
3228          * be no jobs in the queue.
3229          */
3230
3231         ZERO_STRUCTP(status);
3232         slprintf(keystr, sizeof(keystr)-1, "STATUS/%s", sharename);
3233         key = string_tdb_data(keystr);
3234
3235         data = tdb_fetch_compat(pdb->tdb, key);
3236         if (data.dptr) {
3237                 if (data.dsize == sizeof(*status)) {
3238                         /* this memcpy is ok since the status struct was
3239                            not packed before storing it in the tdb */
3240                         memcpy(status, data.dptr, sizeof(*status));
3241                 }
3242                 SAFE_FREE(data.dptr);
3243         }
3244
3245         /*
3246          * Now, fetch the print queue information.  We first count the number
3247          * of entries, and then only retrieve the queue if necessary.
3248          */
3249
3250         if (!get_stored_queue_info(msg_ctx, pdb, snum, &count, ppqueue)) {
3251                 release_print_db(pdb);
3252                 return 0;
3253         }
3254
3255         release_print_db(pdb);
3256         return count;
3257 }
3258
3259 /****************************************************************************
3260  Pause a queue.
3261 ****************************************************************************/
3262
3263 WERROR print_queue_pause(const struct auth_session_info *server_info,
3264                          struct messaging_context *msg_ctx, int snum)
3265 {
3266         int ret;
3267         struct printif *current_printif = get_printer_fns( snum );
3268
3269         if (!print_access_check(server_info, msg_ctx, snum,
3270                                 PRINTER_ACCESS_ADMINISTER)) {
3271                 return WERR_ACCESS_DENIED;
3272         }
3273
3274
3275         become_root();
3276
3277         ret = (*(current_printif->queue_pause))(snum);
3278
3279         unbecome_root();
3280
3281         if (ret != 0) {
3282                 return WERR_INVALID_PARAM;
3283         }
3284
3285         /* force update the database */
3286         print_cache_flush(lp_const_servicename(snum));
3287
3288         /* Send a printer notify message */
3289
3290         notify_printer_status(server_event_context(), msg_ctx, snum,
3291                               PRINTER_STATUS_PAUSED);
3292
3293         return WERR_OK;
3294 }
3295
3296 /****************************************************************************
3297  Resume a queue.
3298 ****************************************************************************/
3299
3300 WERROR print_queue_resume(const struct auth_session_info *server_info,
3301                           struct messaging_context *msg_ctx, int snum)
3302 {
3303         int ret;
3304         struct printif *current_printif = get_printer_fns( snum );
3305
3306         if (!print_access_check(server_info, msg_ctx, snum,
3307                                 PRINTER_ACCESS_ADMINISTER)) {
3308                 return WERR_ACCESS_DENIED;
3309         }
3310
3311         become_root();
3312
3313         ret = (*(current_printif->queue_resume))(snum);
3314
3315         unbecome_root();
3316
3317         if (ret != 0) {
3318                 return WERR_INVALID_PARAM;
3319         }
3320
3321         /* make sure the database is up to date */
3322         if (print_cache_expired(lp_const_servicename(snum), True))
3323                 print_queue_update(msg_ctx, snum, True);
3324
3325         /* Send a printer notify message */
3326
3327         notify_printer_status(server_event_context(), msg_ctx, snum,
3328                               PRINTER_STATUS_OK);
3329
3330         return WERR_OK;
3331 }
3332
3333 /****************************************************************************
3334  Purge a queue - implemented by deleting all jobs that we can delete.
3335 ****************************************************************************/
3336
3337 WERROR print_queue_purge(const struct auth_session_info *server_info,
3338                          struct messaging_context *msg_ctx, int snum)
3339 {
3340         print_queue_struct *queue;
3341         print_status_struct status;
3342         int njobs, i;
3343         bool can_job_admin;
3344
3345         /* Force and update so the count is accurate (i.e. not a cached count) */
3346         print_queue_update(msg_ctx, snum, True);
3347
3348         can_job_admin = print_access_check(server_info,
3349                                            msg_ctx,
3350                                            snum,
3351                                            JOB_ACCESS_ADMINISTER);
3352         njobs = print_queue_status(msg_ctx, snum, &queue, &status);
3353
3354         if ( can_job_admin )
3355                 become_root();
3356
3357         for (i=0;i<njobs;i++) {
3358                 bool owner = is_owner(server_info, lp_const_servicename(snum),
3359                                       queue[i].sysjob);
3360
3361                 if (owner || can_job_admin) {
3362                         print_job_delete1(server_event_context(), msg_ctx,
3363                                           snum, queue[i].sysjob);
3364                 }
3365         }
3366
3367         if ( can_job_admin )
3368                 unbecome_root();
3369
3370         /* update the cache */
3371         print_queue_update(msg_ctx, snum, True);
3372
3373         SAFE_FREE(queue);
3374
3375         return WERR_OK;
3376 }