source3/smbd/service.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    service (connection) opening and closing
   5    Copyright (C) Andrew Tridgell 1992-1998
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern struct timeval smb_last_time;
  25 extern int case_default;
  26 extern BOOL case_preserve;
  27 extern BOOL short_case_preserve;
  28 extern BOOL case_mangle;
  29 extern BOOL case_sensitive;
  30 extern BOOL use_mangled_map;
  31 extern fstring remote_machine;
  32 extern userdom_struct current_user_info;
  33 extern fstring remote_machine;
  34
  35
  36 /****************************************************************************
  37 load parameters specific to a connection/service
  38 ****************************************************************************/
  39 BOOL become_service(connection_struct *conn,BOOL do_chdir)
  40 {
  41         extern char magic_char;
  42         static connection_struct *last_conn;
  43         int snum;
  44
  45         if (!conn)  {
  46                 last_conn = NULL;
  47                 return(False);
  48         }
  49
  50         conn->lastused = smb_last_time.tv_sec;
  51
  52         snum = SNUM(conn);
  53
  54         if (do_chdir &&
  55             vfs_ChDir(conn,conn->connectpath) != 0 &&
  56             vfs_ChDir(conn,conn->origpath) != 0) {
  57                 DEBUG(0,("chdir (%s) failed\n",
  58                          conn->connectpath));
  59                 return(False);
  60         }
  61
  62         if (conn == last_conn)
  63                 return(True);
  64
  65         last_conn = conn;
  66
  67         case_default = lp_defaultcase(snum);
  68         case_preserve = lp_preservecase(snum);
  69         short_case_preserve = lp_shortpreservecase(snum);
  70         case_mangle = lp_casemangle(snum);
  71         case_sensitive = lp_casesensitive(snum);
  72         magic_char = lp_magicchar(snum);
  73         use_mangled_map = (*lp_mangled_map(snum) ? True:False);
  74         return(True);
  75 }
  76
  77 /****************************************************************************
  78  Add a home service. Returns the new service number or -1 if fail.
  79 ****************************************************************************/
  80
  81 int add_home_service(char *service, char *homedir)
  82 {
  83         int iHomeService;
  84         int iService;
  85         fstring new_service;
  86         char *usr_p = NULL;
  87
  88         if (!service || !homedir)
  89                 return -1;
  90
  91         if ((iHomeService = lp_servicenumber(HOMES_NAME)) < 0)
  92                 return -1;
  93
  94         /*
  95          * If this is a winbindd provided username, remove
  96          * the domain component before adding the service.
  97          * Log a warning if the "path=" parameter does not
  98          * include any macros.
  99          */
 100
 101         fstrcpy(new_service, service);
 102
 103         if ((usr_p = strchr_m(service,*lp_winbind_separator())) != NULL)
 104                 fstrcpy(new_service, usr_p+1);
 105
 106         lp_add_home(new_service,iHomeService,homedir);
 107         iService = lp_servicenumber(new_service);
 108
 109         return iService;
 110 }
 111
 112 /****************************************************************************
 113  Find a service entry. service is always in dos codepage.
 114 ****************************************************************************/
 115
 116 int find_service(char *service)
 117 {
 118    int iService;
 119
 120    all_string_sub(service,"\\","/",0);
 121
 122    iService = lp_servicenumber(service);
 123
 124    /* now handle the special case of a home directory */
 125    if (iService < 0)
 126    {
 127       char *phome_dir = get_user_home_dir(service);
 128
 129       if(!phome_dir)
 130       {
 131         /*
 132          * Try mapping the servicename, it may
 133          * be a Windows to unix mapped user name.
 134          */
 135         if(map_username(service))
 136           phome_dir = get_user_home_dir(service);
 137       }
 138
 139       DEBUG(3,("checking for home directory %s gave %s\n",service,
 140             phome_dir?phome_dir:"(NULL)"));
 141
 142       iService = add_home_service(service,phome_dir);
 143    }
 144
 145    /* If we still don't have a service, attempt to add it as a printer. */
 146    if (iService < 0)
 147    {
 148       int iPrinterService;
 149
 150       if ((iPrinterService = lp_servicenumber(PRINTERS_NAME)) >= 0)
 151       {
 152          char *pszTemp;
 153
 154          DEBUG(3,("checking whether %s is a valid printer name...\n", service));
 155          pszTemp = PRINTCAP;
 156          if ((pszTemp != NULL) && pcap_printername_ok(service, pszTemp))
 157          {
 158             DEBUG(3,("%s is a valid printer name\n", service));
 159             DEBUG(3,("adding %s as a printer service\n", service));
 160             lp_add_printer(service,iPrinterService);
 161             iService = lp_servicenumber(service);
 162             if (iService < 0)
 163                DEBUG(0,("failed to add %s as a printer service!\n", service));
 164          }
 165          else
 166             DEBUG(3,("%s is not a valid printer name\n", service));
 167       }
 168    }
 169
 170    /* Check for default vfs service?  Unsure whether to implement this */
 171    if (iService < 0)
 172    {
 173    }
 174
 175    /* just possibly it's a default service? */
 176    if (iService < 0)
 177    {
 178      char *pdefservice = lp_defaultservice();
 179      if (pdefservice && *pdefservice &&
 180          !strequal(pdefservice,service) &&
 181          !strstr(service,".."))
 182      {
 183        /*
 184         * We need to do a local copy here as lp_defaultservice()
 185         * returns one of the rotating lp_string buffers that
 186         * could get overwritten by the recursive find_service() call
 187         * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
 188         */
 189        pstring defservice;
 190        pstrcpy(defservice, pdefservice);
 191        iService = find_service(defservice);
 192        if (iService >= 0)
 193        {
 194          all_string_sub(service,"_","/",0);
 195          iService = lp_add_service(service,iService);
 196        }
 197      }
 198    }
 199
 200    if (iService >= 0)
 201      if (!VALID_SNUM(iService))
 202      {
 203        DEBUG(0,("Invalid snum %d for %s\n",iService,service));
 204        iService = -1;
 205      }
 206
 207    if (iService < 0)
 208      DEBUG(3,("find_service() failed to find service %s\n", service));
 209
 210    return (iService);
 211 }
 212
 213
 214 /****************************************************************************
 215  do some basic sainity checks on the share.
 216  This function modifies dev, ecode.
 217 ****************************************************************************/
 218 static NTSTATUS share_sanity_checks(int snum, char* service, char *dev)
 219 {
 220
 221         if (!lp_snum_ok(snum) ||
 222             !check_access(smbd_server_fd(),
 223                           lp_hostsallow(snum), lp_hostsdeny(snum))) {
 224                 return NT_STATUS_ACCESS_DENIED;
 225         }
 226
 227         /* you can only connect to the IPC$ service as an ipc device */
 228         if (strequal(service,"IPC$") || strequal(service,"ADMIN$"))
 229                 pstrcpy(dev,"IPC");
 230
 231         if (*dev == '?' || !*dev) {
 232                 if (lp_print_ok(snum)) {
 233                         pstrcpy(dev,"LPT1:");
 234                 } else {
 235                         pstrcpy(dev,"A:");
 236                 }
 237         }
 238
 239         /* if the request is as a printer and you can't print then refuse */
 240         strupper(dev);
 241         if (!lp_print_ok(snum) && (strncmp(dev,"LPT",3) == 0)) {
 242                 DEBUG(1,("Attempt to connect to non-printer as a printer\n"));
 243                 return NT_STATUS_BAD_DEVICE_TYPE;
 244         }
 245
 246         /* Behave as a printer if we are supposed to */
 247         if (lp_print_ok(snum) && (strcmp(dev, "A:") == 0)) {
 248                 pstrcpy(dev, "LPT1:");
 249         }
 250
 251         return NT_STATUS_OK;
 252 }
 253
 254
 255 /****************************************************************************
 256  readonly share?
 257 ****************************************************************************/
 258 static void set_read_only(connection_struct *conn)
 259 {
 260         char **list;
 261         char *service = lp_servicename(conn->service);
 262         conn->read_only = lp_readonly(conn->service);
 263
 264         if (!service) return;
 265
 266         lp_list_copy(&list, lp_readlist(conn->service));
 267         if (list) {
 268                 if (!lp_list_substitute(list, "%S", service)) {
 269                         DEBUG(0, ("ERROR: read list substitution failed\n"));
 270                 }
 271                 if (user_in_list(conn->user, list))
 272                         conn->read_only = True;
 273                 lp_list_free(&list);
 274         }
 275
 276         lp_list_copy(&list, lp_writelist(conn->service));
 277         if (list) {
 278                 if (!lp_list_substitute(list, "%S", service)) {
 279                         DEBUG(0, ("ERROR: write list substitution failed\n"));
 280                 }
 281                 if (user_in_list(conn->user, list))
 282                         conn->read_only = False;
 283                 lp_list_free(&list);
 284         }
 285 }
 286
 287
 288 /****************************************************************************
 289   admin user check
 290 ****************************************************************************/
 291 static void set_admin_user(connection_struct *conn)
 292 {
 293         /* admin user check */
 294
 295         /* JRA - original code denied admin user if the share was
 296            marked read_only. Changed as I don't think this is needed,
 297            but old code left in case there is a problem here.
 298         */
 299         if (user_in_list(conn->user,lp_admin_users(conn->service))
 300 #if 0
 301             && !conn->read_only
 302 #endif
 303             ) {
 304                 conn->admin_user = True;
 305                 DEBUG(0,("%s logged in as admin user (root privileges)\n",conn->user));
 306         } else {
 307                 conn->admin_user = False;
 308         }
 309
 310 #if 0 /* This done later, for now */
 311         /* admin users always run as uid=0 */
 312         if (conn->admin_user) {
 313                 conn->uid = 0;
 314         }
 315 #endif
 316 }
 317
 318
 319 /****************************************************************************
 320   make a connection to a service
 321 ****************************************************************************/
 322 connection_struct *make_connection(char *service,char *password,
 323                                    int pwlen, char *dev,uint16 vuid, NTSTATUS *status)
 324 {
 325         int snum;
 326         struct passwd *pass = NULL;
 327         BOOL guest = False;
 328         BOOL force = False;
 329         connection_struct *conn;
 330
 331         fstring user;
 332         ZERO_STRUCT(user);
 333
 334         strlower(service);
 335
 336         snum = find_service(service);
 337
 338         if (snum < 0) {
 339                 if (strequal(service,"IPC$") || strequal(service,"ADMIN$")) {
 340                         DEBUG(3,("refusing IPC connection\n"));
 341                         *status = NT_STATUS_ACCESS_DENIED;
 342                         return NULL;
 343                 }
 344
 345                 DEBUG(0,("%s (%s) couldn't find service %s\n",
 346                          remote_machine, client_addr(), service));
 347                 *status = NT_STATUS_BAD_NETWORK_PATH;
 348                 return NULL;
 349         }
 350
 351         if (strequal(service,HOMES_NAME)) {
 352                 if(lp_security() != SEC_SHARE) {
 353                         if (validated_username(vuid)) {
 354                                 fstring unix_username;
 355                                 fstrcpy(unix_username,validated_username(vuid));
 356                                 return(make_connection(unix_username,password,pwlen,dev,vuid,status));
 357                         }
 358                 } else {
 359                         /* Security = share. Try with current_user_info.smb_name
 360                          * as the username.  */
 361                         if(*current_user_info.smb_name) {
 362                                 fstring unix_username;
 363                                 fstrcpy(unix_username,current_user_info.smb_name);
 364                                 map_username(unix_username);
 365                                 return(make_connection(unix_username,password,pwlen,dev,vuid,status));
 366                         }
 367                 }
 368         }
 369
 370         if (NT_STATUS_IS_ERR(*status = share_sanity_checks(snum, service, dev))) {
 371                 return NULL;
 372         }
 373
 374         /* add it as a possible user name if we
 375            are in share mode security */
 376         if (lp_security() == SEC_SHARE) {
 377                 add_session_user(service);
 378         }
 379
 380
 381         /* shall we let them in? */
 382         if (!authorise_login(snum,user,password,pwlen,&guest,&force,vuid)) {
 383                 DEBUG( 2, ( "Invalid username/password for %s [%s]\n", service, user ) );
 384                 *status = NT_STATUS_WRONG_PASSWORD;
 385                 return NULL;
 386         }
 387
 388         add_session_user(user);
 389
 390         conn = conn_new();
 391         if (!conn) {
 392                 DEBUG(0,("Couldn't find free connection.\n"));
 393                 *status = NT_STATUS_INSUFFICIENT_RESOURCES;
 394                 return NULL;
 395         }
 396
 397         /* find out some info about the user */
 398         pass = smb_getpwnam(user,True);
 399
 400         if (pass == NULL) {
 401                 DEBUG(0,( "Couldn't find account %s\n",user));
 402                 *status = NT_STATUS_NO_SUCH_USER;
 403                 conn_free(conn);
 404                 return NULL;
 405         }
 406
 407         conn->force_user = force;
 408         conn->vuid = vuid;
 409         conn->uid = pass->pw_uid;
 410         conn->gid = pass->pw_gid;
 411         safe_strcpy(conn->client_address, client_addr(),
 412                     sizeof(conn->client_address)-1);
 413         conn->num_files_open = 0;
 414         conn->lastused = time(NULL);
 415         conn->service = snum;
 416         conn->used = True;
 417         conn->printer = (strncmp(dev,"LPT",3) == 0);
 418         conn->ipc = ((strncmp(dev,"IPC",3) == 0) || strequal(dev,"ADMIN$"));
 419         conn->dirptr = NULL;
 420         conn->veto_list = NULL;
 421         conn->hide_list = NULL;
 422         conn->veto_oplock_list = NULL;
 423         string_set(&conn->dirpath,"");
 424         string_set(&conn->user,user);
 425         conn->nt_user_token = NULL;
 426
 427         set_read_only(conn);
 428
 429         set_admin_user(conn);
 430
 431         /*
 432          * If force user is true, then store the
 433          * given userid and also the primary groupid
 434          * of the user we're forcing.
 435          */
 436
 437         if (*lp_force_user(snum)) {
 438                 struct passwd *pass2;
 439                 pstring fuser;
 440                 pstrcpy(fuser,lp_force_user(snum));
 441
 442                 /* Allow %S to be used by force user. */
 443                 pstring_sub(fuser,"%S",service);
 444
 445                 pass2 = (struct passwd *)Get_Pwnam(fuser,True);
 446                 if (pass2) {
 447                         conn->uid = pass2->pw_uid;
 448                         conn->gid = pass2->pw_gid;
 449                         string_set(&conn->user,fuser);
 450                         fstrcpy(user,fuser);
 451                         conn->force_user = True;
 452                         DEBUG(3,("Forced user %s\n",fuser));
 453                 } else {
 454                         DEBUG(1,("Couldn't find user %s\n",fuser));
 455                 }
 456         }
 457
 458         /* admin users always run as uid=0 */
 459         if (conn->admin_user) {
 460                 conn->uid = 0;
 461         }
 462
 463 #ifdef HAVE_GETGRNAM
 464         /*
 465          * If force group is true, then override
 466          * any groupid stored for the connecting user.
 467          */
 468
 469         if (*lp_force_group(snum)) {
 470                 gid_t gid;
 471                 pstring gname;
 472                 pstring tmp_gname;
 473                 BOOL user_must_be_member = False;
 474
 475                 StrnCpy(tmp_gname,lp_force_group(snum),sizeof(pstring)-1);
 476
 477                 if (tmp_gname[0] == '+') {
 478                         user_must_be_member = True;
 479                         StrnCpy(gname,&tmp_gname[1],sizeof(pstring)-2);
 480                 } else {
 481                         StrnCpy(gname,tmp_gname,sizeof(pstring)-1);
 482                 }
 483                 /* default service may be a group name          */
 484                 pstring_sub(gname,"%S",service);
 485                 gid = nametogid(gname);
 486
 487                 if (gid != (gid_t)-1) {
 488                         /*
 489                          * If the user has been forced and the forced group starts
 490                          * with a '+', then we only set the group to be the forced
 491                          * group if the forced user is a member of that group.
 492                          * Otherwise, the meaning of the '+' would be ignored.
 493                          */
 494                         if (conn->force_user && user_must_be_member) {
 495                                 if (user_in_group_list( user, gname )) {
 496                                                 conn->gid = gid;
 497                                                 DEBUG(3,("Forced group %s for member %s\n",gname,user));
 498                                 }
 499                         } else {
 500                                 conn->gid = gid;
 501                                 DEBUG(3,("Forced group %s\n",gname));
 502                         }
 503                 } else {
 504                         DEBUG(1,("Couldn't find group %s\n",gname));
 505                 }
 506         }
 507 #endif /* HAVE_GETGRNAM */
 508
 509         {
 510                 pstring s;
 511                 pstrcpy(s,lp_pathname(snum));
 512                 standard_sub_conn(conn,s);
 513                 string_set(&conn->connectpath,s);
 514                 DEBUG(3,("Connect path is %s\n",s));
 515         }
 516
 517         /* groups stuff added by ih */
 518         conn->ngroups = 0;
 519         conn->groups = NULL;
 520
 521         /* Find all the groups this uid is in and
 522            store them. Used by become_user() */
 523         initialise_groups(conn->user, conn->uid, conn->gid);
 524         get_current_groups(&conn->ngroups,&conn->groups);
 525
 526         conn->nt_user_token = create_nt_token(conn->uid, conn->gid,
 527                                               conn->ngroups, conn->groups,
 528                                               guest);
 529
 530         /*
 531          * New code to check if there's a share security descripter
 532          * added from NT server manager. This is done after the
 533          * smb.conf checks are done as we need a uid and token. JRA.
 534          */
 535
 536         {
 537                 BOOL can_write = share_access_check(conn, snum, vuid, FILE_WRITE_DATA);
 538
 539                 if (!can_write) {
 540                         if (!share_access_check(conn, snum, vuid, FILE_READ_DATA)) {
 541                                 /* No access, read or write. */
 542                                 *status = NT_STATUS_ACCESS_DENIED;
 543                                 DEBUG(0,( "make_connection: connection to %s denied due to security descriptor.\n",
 544                                         service ));
 545                                 conn_free(conn);
 546                                 return NULL;
 547                         } else {
 548                                 conn->read_only = True;
 549                         }
 550                 }
 551         }
 552         /* Initialise VFS function pointers */
 553
 554         if (!smbd_vfs_init(conn)) {
 555                 DEBUG(0, ("vfs_init failed for service %s\n", lp_servicename(SNUM(conn))));
 556                 conn_free(conn);
 557                 return NULL;
 558         }
 559
 560         if (!become_user(conn, conn->vuid)) {
 561                 /* No point continuing if they fail the basic checks */
 562                 DEBUG(0,("Can't become connected user!\n"));
 563                 conn_free(conn);
 564                 *status = NT_STATUS_LOGON_FAILURE;
 565                 return NULL;
 566         }
 567
 568 /* ROOT Activities: */
 569         become_root();
 570         /* check number of connections */
 571         if (!claim_connection(conn,
 572                               lp_servicename(SNUM(conn)),
 573                               lp_max_connections(SNUM(conn)),
 574                               False)) {
 575                 DEBUG(1,("too many connections - rejected\n"));
 576                 *status = NT_STATUS_INSUFFICIENT_RESOURCES;
 577                 conn_free(conn);
 578                 unbecome_root();
 579                 unbecome_user();
 580                 return NULL;
 581         }
 582
 583         /* Preexecs are done here as they might make the dir we are to ChDir to below */
 584         /* execute any "root preexec = " line */
 585         if (*lp_rootpreexec(SNUM(conn))) {
 586                 int ret;
 587                 pstring cmd;
 588                 pstrcpy(cmd,lp_rootpreexec(SNUM(conn)));
 589                 standard_sub_conn(conn,cmd);
 590                 DEBUG(5,("cmd=%s\n",cmd));
 591                 ret = smbrun(cmd,NULL);
 592                 if (ret != 0 && lp_rootpreexec_close(SNUM(conn))) {
 593                         DEBUG(1,("root preexec gave %d - failing connection\n", ret));
 594                         yield_connection(conn,
 595                                          lp_servicename(SNUM(conn)),
 596                                          lp_max_connections(SNUM(conn)));
 597                         conn_free(conn);
 598                         *status = NT_STATUS_UNSUCCESSFUL;
 599                         unbecome_root();
 600                         unbecome_user();
 601                         return NULL;
 602                 }
 603         }
 604         unbecome_root();
 605
 606 /* USER Activites: */
 607         /* Remember that a different vuid can connect later without these checks... */
 608
 609         /* Preexecs are done here as they might make the dir we are to ChDir to below */
 610         /* execute any "preexec = " line */
 611         if (*lp_preexec(SNUM(conn))) {
 612                 int ret;
 613                 pstring cmd;
 614                 pstrcpy(cmd,lp_preexec(SNUM(conn)));
 615                 standard_sub_conn(conn,cmd);
 616                 ret = smbrun(cmd,NULL);
 617                 if (ret != 0 && lp_preexec_close(SNUM(conn))) {
 618                         DEBUG(1,("preexec gave %d - failing connection\n", ret));
 619                         unbecome_user();
 620                         yield_connection(conn, lp_servicename(SNUM(conn)), lp_max_connections(SNUM(conn)));
 621                         conn_free(conn);
 622                         *status = NT_STATUS_UNSUCCESSFUL;
 623                         return NULL;
 624                 }
 625         }
 626
 627         if (vfs_ChDir(conn,conn->connectpath) != 0) {
 628                 DEBUG(0,("%s (%s) Can't change directory to %s (%s)\n",
 629                          remote_machine, conn->client_address,
 630                          conn->connectpath,strerror(errno)));
 631                 unbecome_user();
 632                 yield_connection(conn,
 633                                  lp_servicename(SNUM(conn)),
 634                                  lp_max_connections(SNUM(conn)));
 635                 conn_free(conn);
 636                 *status = NT_STATUS_BAD_NETWORK_NAME;
 637                 return NULL;
 638         }
 639
 640         string_set(&conn->origpath,conn->connectpath);
 641
 642 #if SOFTLINK_OPTIMISATION
 643         /* resolve any soft links early */
 644         {
 645                 pstring s;
 646                 pstrcpy(s,conn->connectpath);
 647                 vfs_GetWd(conn,s);
 648                 string_set(&conn->connectpath,s);
 649                 vfs_ChDir(conn,conn->connectpath);
 650         }
 651 #endif
 652
 653         /*
 654          * Print out the 'connected as' stuff here as we need
 655          * to know the effective uid and gid we will be using
 656          * (at least initially).
 657          */
 658
 659         if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
 660                 dbgtext( "%s (%s) ", remote_machine, conn->client_address );
 661                 dbgtext( "connect to service %s ", lp_servicename(SNUM(conn)) );
 662                 dbgtext( "initially as user %s ", user );
 663                 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
 664                 dbgtext( "(pid %d)\n", (int)sys_getpid() );
 665         }
 666
 667         /* Add veto/hide lists */
 668         if (!IS_IPC(conn) && !IS_PRINT(conn)) {
 669                 set_namearray( &conn->veto_list, lp_veto_files(SNUM(conn)));
 670                 set_namearray( &conn->hide_list, lp_hide_files(SNUM(conn)));
 671                 set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(SNUM(conn)));
 672         }
 673
 674         /* Invoke VFS make connection hook */
 675
 676         if (conn->vfs_ops.connect) {
 677                 if (conn->vfs_ops.connect(conn, service, user) < 0) {
 678                         DEBUG(0,("make_connection: VFS make connection failed!\n"));
 679                         *status = NT_STATUS_UNSUCCESSFUL;
 680                         unbecome_user();
 681                         conn_free(conn);
 682                         return NULL;
 683                 }
 684         }
 685
 686         /* we've finished with the sensitive stuff */
 687         unbecome_user();
 688
 689         return(conn);
 690 }
 691
 692
 693 /****************************************************************************
 694 close a cnum
 695 ****************************************************************************/
 696 void close_cnum(connection_struct *conn, uint16 vuid)
 697 {
 698         DirCacheFlush(SNUM(conn));
 699
 700         unbecome_user();
 701
 702         DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
 703                                  remote_machine,conn->client_address,
 704                                  lp_servicename(SNUM(conn))));
 705
 706         if (conn->vfs_ops.disconnect != NULL) {
 707
 708             /* Call VFS disconnect hook */
 709
 710             conn->vfs_ops.disconnect(conn);
 711
 712         }
 713
 714         yield_connection(conn,
 715                          lp_servicename(SNUM(conn)),
 716                          lp_max_connections(SNUM(conn)));
 717
 718         file_close_conn(conn);
 719         dptr_closecnum(conn);
 720
 721         /* execute any "postexec = " line */
 722         if (*lp_postexec(SNUM(conn)) &&
 723             become_user(conn, vuid))  {
 724                 pstring cmd;
 725                 pstrcpy(cmd,lp_postexec(SNUM(conn)));
 726                 standard_sub_conn(conn,cmd);
 727                 smbrun(cmd,NULL);
 728                 unbecome_user();
 729         }
 730
 731         unbecome_user();
 732         /* execute any "root postexec = " line */
 733         if (*lp_rootpostexec(SNUM(conn)))  {
 734                 pstring cmd;
 735                 pstrcpy(cmd,lp_rootpostexec(SNUM(conn)));
 736                 standard_sub_conn(conn,cmd);
 737                 smbrun(cmd,NULL);
 738         }
 739         conn_free(conn);
 740 }