source3/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001
   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 userdom_struct current_user_info;
  25 extern uint16 global_oplock_port;
  26 extern uint16 global_smbpid;
  27 extern BOOL global_client_failed_oplock_break;
  28
  29 /****************************************************************************
  30  fd support routines - attempt to do a dos_open.
  31 ****************************************************************************/
  32
  33 static int fd_open(struct connection_struct *conn, char *fname,
  34                    int flags, mode_t mode)
  35 {
  36         int fd;
  37 #ifdef O_NOFOLLOW
  38         if (!lp_symlinks(SNUM(conn)))
  39                 flags |= O_NOFOLLOW;
  40 #endif
  41
  42         fd = SMB_VFS_OPEN(conn,fname,flags,mode);
  43
  44         /* Fix for files ending in '.' */
  45         if((fd == -1) && (errno == ENOENT) &&
  46            (strchr_m(fname,'.')==NULL)) {
  47                 pstrcat(fname,".");
  48                 fd = SMB_VFS_OPEN(conn,fname,flags,mode);
  49         }
  50
  51         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n", fname,
  52                 flags, (int)mode, fd, (fd == -1) ? strerror(errno) : "" ));
  53
  54         return fd;
  55 }
  56
  57 /****************************************************************************
  58  Close the file associated with a fsp.
  59 ****************************************************************************/
  60
  61 int fd_close(struct connection_struct *conn, files_struct *fsp)
  62 {
  63         if (fsp->fd == -1)
  64                 return 0; /* what we used to call a stat open. */
  65         return fd_close_posix(conn, fsp);
  66 }
  67
  68
  69 /****************************************************************************
  70  Check a filename for the pipe string.
  71 ****************************************************************************/
  72
  73 static void check_for_pipe(char *fname)
  74 {
  75         /* special case of pipe opens */
  76         char s[10];
  77         StrnCpy(s,fname,sizeof(s)-1);
  78         strlower_m(s);
  79         if (strstr(s,"pipe/")) {
  80                 DEBUG(3,("Rejecting named pipe open for %s\n",fname));
  81                 unix_ERR_class = ERRSRV;
  82                 unix_ERR_code = ERRaccess;
  83                 unix_ERR_ntstatus = NT_STATUS_ACCESS_DENIED;
  84         }
  85 }
  86
  87 /****************************************************************************
  88  Open a file.
  89 ****************************************************************************/
  90
  91 static BOOL open_file(files_struct *fsp,connection_struct *conn,
  92                       const char *fname1,SMB_STRUCT_STAT *psbuf,int flags,mode_t mode, uint32 desired_access)
  93 {
  94         extern struct current_user current_user;
  95         pstring fname;
  96         int accmode = (flags & O_ACCMODE);
  97         int local_flags = flags;
  98
  99         fsp->fd = -1;
 100         fsp->oplock_type = NO_OPLOCK;
 101         errno = EPERM;
 102
 103         pstrcpy(fname,fname1);
 104
 105         /* Check permissions */
 106
 107         /*
 108          * This code was changed after seeing a client open request
 109          * containing the open mode of (DENY_WRITE/read-only) with
 110          * the 'create if not exist' bit set. The previous code
 111          * would fail to open the file read only on a read-only share
 112          * as it was checking the flags parameter  directly against O_RDONLY,
 113          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 114          * JRA.
 115          */
 116
 117         if (!CAN_WRITE(conn)) {
 118                 /* It's a read-only share - fail if we wanted to write. */
 119                 if(accmode != O_RDONLY) {
 120                         DEBUG(3,("Permission denied opening %s\n",fname));
 121                         check_for_pipe(fname);
 122                         return False;
 123                 } else if(flags & O_CREAT) {
 124                         /* We don't want to write - but we must make sure that O_CREAT
 125                            doesn't create the file if we have write access into the
 126                            directory.
 127                         */
 128                         flags &= ~O_CREAT;
 129                         local_flags &= ~O_CREAT;
 130                 }
 131         }
 132
 133         /*
 134          * This little piece of insanity is inspired by the
 135          * fact that an NT client can open a file for O_RDONLY,
 136          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 137          * If the client *can* write to the file, then it expects to
 138          * truncate the file, even though it is opening for readonly.
 139          * Quicken uses this stupid trick in backup file creation...
 140          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 141          * for helping track this one down. It didn't bite us in 2.0.x
 142          * as we always opened files read-write in that release. JRA.
 143          */
 144
 145         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 146                 DEBUG(10,("open_file: truncate requested on read-only open for file %s\n",fname ));
 147                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 148         }
 149
 150         if ((desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 151                         (local_flags & O_CREAT) || ((local_flags & O_TRUNC) == O_TRUNC) ) {
 152
 153                 /*
 154                  * We can't actually truncate here as the file may be locked.
 155                  * open_file_shared will take care of the truncate later. JRA.
 156                  */
 157
 158                 local_flags &= ~O_TRUNC;
 159
 160 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 161                 /*
 162                  * We would block on opening a FIFO with no one else on the
 163                  * other end. Do what we used to do and add O_NONBLOCK to the
 164                  * open flags. JRA.
 165                  */
 166
 167                 if (VALID_STAT(*psbuf) && S_ISFIFO(psbuf->st_mode))
 168                         local_flags |= O_NONBLOCK;
 169 #endif
 170
 171                 /* Don't create files with Microsoft wildcard characters. */
 172                 if ((local_flags & O_CREAT) && !VALID_STAT(*psbuf) && ms_has_wild(fname))  {
 173                         unix_ERR_class = ERRDOS;
 174                         unix_ERR_code = ERRinvalidname;
 175                         unix_ERR_ntstatus = NT_STATUS_OBJECT_NAME_INVALID;
 176                         return False;
 177                 }
 178
 179                 /* Actually do the open */
 180                 fsp->fd = fd_open(conn, fname, local_flags, mode);
 181                 if (fsp->fd == -1)  {
 182                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) (flags=%d)\n",
 183                                  fname,strerror(errno),local_flags,flags));
 184                         check_for_pipe(fname);
 185                         return False;
 186                 }
 187
 188                 /* Inherit the ACL if the file was created. */
 189                 if ((local_flags & O_CREAT) && !VALID_STAT(*psbuf))
 190                         inherit_access_acl(conn, fname, mode);
 191
 192         } else
 193                 fsp->fd = -1; /* What we used to call a stat open. */
 194
 195         if (!VALID_STAT(*psbuf)) {
 196                 int ret;
 197
 198                 if (fsp->fd == -1)
 199                         ret = SMB_VFS_STAT(conn, fname, psbuf);
 200                 else {
 201                         ret = SMB_VFS_FSTAT(fsp,fsp->fd,psbuf);
 202                         /* If we have an fd, this stat should succeed. */
 203                         if (ret == -1)
 204                                 DEBUG(0,("Error doing fstat on open file %s (%s)\n", fname,strerror(errno) ));
 205                 }
 206
 207                 /* For a non-io open, this stat failing means file not found. JRA */
 208                 if (ret == -1) {
 209                         fd_close(conn, fsp);
 210                         return False;
 211                 }
 212         }
 213
 214         /*
 215          * POSIX allows read-only opens of directories. We don't
 216          * want to do this (we use a different code path for this)
 217          * so catch a directory open and return an EISDIR. JRA.
 218          */
 219
 220         if(S_ISDIR(psbuf->st_mode)) {
 221                 fd_close(conn, fsp);
 222                 errno = EISDIR;
 223                 return False;
 224         }
 225
 226         fsp->mode = psbuf->st_mode;
 227         fsp->inode = psbuf->st_ino;
 228         fsp->dev = psbuf->st_dev;
 229         fsp->vuid = current_user.vuid;
 230         fsp->file_pid = global_smbpid;
 231         fsp->size = psbuf->st_size;
 232         fsp->can_lock = True;
 233         fsp->can_read = ((flags & O_WRONLY)==0);
 234         fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
 235         fsp->share_mode = 0;
 236         fsp->desired_access = desired_access;
 237         fsp->print_file = False;
 238         fsp->modified = False;
 239         fsp->oplock_type = NO_OPLOCK;
 240         fsp->sent_oplock_break = NO_BREAK_SENT;
 241         fsp->is_directory = False;
 242         fsp->is_stat = False;
 243         fsp->directory_delete_on_close = False;
 244         string_set(&fsp->fsp_name,fname);
 245         fsp->wcp = NULL; /* Write cache pointer. */
 246
 247         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 248                  *current_user_info.smb_name ? current_user_info.smb_name : conn->user,fsp->fsp_name,
 249                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 250                  conn->num_files_open + 1));
 251
 252         return True;
 253 }
 254
 255 /****************************************************************************
 256   C. Hoch 11/22/95
 257   Helper for open_file_shared.
 258   Truncate a file after checking locking; close file if locked.
 259   **************************************************************************/
 260
 261 static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp)
 262 {
 263         SMB_BIG_UINT mask = (SMB_BIG_UINT)-1;
 264
 265         if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK,True)){
 266                 errno = EACCES;
 267                 unix_ERR_class = ERRDOS;
 268                 unix_ERR_code = ERRlock;
 269                 unix_ERR_ntstatus = dos_to_ntstatus(ERRDOS, ERRlock);
 270                 return -1;
 271         } else {
 272                 return SMB_VFS_FTRUNCATE(fsp,fsp->fd,0);
 273         }
 274 }
 275
 276 /*******************************************************************
 277 return True if the filename is one of the special executable types
 278 ********************************************************************/
 279 static BOOL is_executable(const char *fname)
 280 {
 281         if ((fname = strrchr_m(fname,'.'))) {
 282                 if (strequal(fname,".com") ||
 283                     strequal(fname,".dll") ||
 284                     strequal(fname,".exe") ||
 285                     strequal(fname,".sym")) {
 286                         return True;
 287                 }
 288         }
 289         return False;
 290 }
 291
 292 enum {AFAIL,AREAD,AWRITE,AALL};
 293
 294 /*******************************************************************
 295 reproduce the share mode access table
 296 this is horrendoously complex, and really can't be justified on any
 297 rational grounds except that this is _exactly_ what NT does. See
 298 the DENY1 and DENY2 tests in smbtorture for a comprehensive set of
 299 test routines.
 300 ********************************************************************/
 301 static int access_table(int new_deny,int old_deny,int old_mode,
 302                         BOOL same_pid, BOOL isexe)
 303 {
 304           if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
 305
 306           if (same_pid) {
 307                   if (isexe && old_mode == DOS_OPEN_RDONLY &&
 308                       old_deny == DENY_DOS && new_deny == DENY_READ) {
 309                           return AFAIL;
 310                   }
 311                   if (!isexe && old_mode == DOS_OPEN_RDONLY &&
 312                       old_deny == DENY_DOS && new_deny == DENY_DOS) {
 313                           return AREAD;
 314                   }
 315                   if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
 316                           if (isexe) return AFAIL;
 317                           if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
 318                           return AALL;
 319                   }
 320                   if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
 321                           if (new_deny == DENY_FCB || new_deny == DENY_READ) {
 322                                   if (isexe) return AREAD;
 323                                   return AFAIL;
 324                           }
 325                   }
 326                   if (old_deny == DENY_FCB) {
 327                           if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
 328                           return AFAIL;
 329                   }
 330           }
 331
 332           if (old_deny == DENY_DOS || new_deny == DENY_DOS ||
 333               old_deny == DENY_FCB || new_deny == DENY_FCB) {
 334                   if (isexe) {
 335                           if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
 336                                   return AFAIL;
 337                           }
 338                           if (old_deny == DENY_DOS) {
 339                                   if (new_deny == DENY_READ &&
 340                                       (old_mode == DOS_OPEN_RDONLY ||
 341                                        old_mode == DOS_OPEN_RDWR)) {
 342                                           return AFAIL;
 343                                   }
 344                                   if (new_deny == DENY_WRITE &&
 345                                       (old_mode == DOS_OPEN_WRONLY ||
 346                                        old_mode == DOS_OPEN_RDWR)) {
 347                                           return AFAIL;
 348                                   }
 349                                   return AALL;
 350                           }
 351                           if (old_deny == DENY_NONE) return AALL;
 352                           if (old_deny == DENY_READ) return AWRITE;
 353                           if (old_deny == DENY_WRITE) return AREAD;
 354                   }
 355                   /* it isn't a exe, dll, sym or com file */
 356                   if (old_deny == new_deny && same_pid)
 357                           return(AALL);
 358
 359                   if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
 360                   if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
 361
 362                   return(AFAIL);
 363           }
 364
 365           switch (new_deny)
 366                   {
 367                   case DENY_WRITE:
 368                           if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
 369                           if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
 370                           if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
 371                           return(AFAIL);
 372                   case DENY_READ:
 373                           if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
 374                           if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
 375                           if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
 376                           return(AFAIL);
 377                   case DENY_NONE:
 378                           if (old_deny==DENY_WRITE) return(AREAD);
 379                           if (old_deny==DENY_READ) return(AWRITE);
 380                           if (old_deny==DENY_NONE) return(AALL);
 381                           return(AFAIL);
 382                   }
 383           return(AFAIL);
 384 }
 385
 386
 387 /****************************************************************************
 388 check if we can open a file with a share mode
 389 ****************************************************************************/
 390
 391 static BOOL check_share_mode(connection_struct *conn, share_mode_entry *share, int share_mode, uint32 desired_access,
 392                              const char *fname, BOOL fcbopen, int *flags)
 393 {
 394         int deny_mode = GET_DENY_MODE(share_mode);
 395         int old_open_mode = GET_OPEN_MODE(share->share_mode);
 396         int old_deny_mode = GET_DENY_MODE(share->share_mode);
 397
 398         /*
 399          * share modes = false means don't bother to check for
 400          * DENY mode conflict. This is a *really* bad idea :-). JRA.
 401          */
 402
 403         if(!lp_share_modes(SNUM(conn)))
 404                 return True;
 405
 406         /*
 407          * Don't allow any opens once the delete on close flag has been
 408          * set.
 409          */
 410
 411         if (GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
 412                 DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
 413                         fname ));
 414                 /* Use errno to map to correct error. */
 415                 unix_ERR_class = SMB_SUCCESS;
 416                 unix_ERR_code = 0;
 417                 unix_ERR_ntstatus = NT_STATUS_OK;
 418                 return False;
 419         }
 420
 421         /* this is a nasty hack, but necessary until we rewrite our open
 422            handling to use a NTCreateX call as the basic call.
 423            NT may open a file with neither read nor write access, and in
 424                    this case it expects the open not to conflict with any
 425                    existing deny modes. This happens (for example) during a
 426                    "xcopy /o" where the second file descriptor is used for
 427                    ACL sets
 428                    (tridge)
 429         */
 430
 431         /*
 432          * This is a bit wierd - the test for desired access not having the
 433          * critical bits seems seems odd. Firstly, if both opens have no
 434          * critical bits then always ignore. Then check the "allow delete"
 435          * then check for either. This probably isn't quite right yet but
 436          * gets us much closer. JRA.
 437          */
 438
 439         /*
 440          * If desired_access doesn't contain READ_DATA,WRITE_DATA,APPEND_DATA or EXECUTE
 441          * and the existing desired_acces then share modes don't conflict.
 442          */
 443
 444         if ( !(desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) &&
 445                 !(share->desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ) {
 446
 447                 /*
 448                  * Wrinkle discovered by smbtorture....
 449                  * If both are non-io open and requester is asking for delete and current open has delete access
 450                  * but neither open has allowed file share delete then deny.... this is very strange and
 451                  * seems to be the only case in which non-io opens conflict. JRA.
 452                  */
 453
 454                 if ((desired_access & DELETE_ACCESS) && (share->desired_access & DELETE_ACCESS) &&
 455                                 (!GET_ALLOW_SHARE_DELETE(share->share_mode) || !GET_ALLOW_SHARE_DELETE(share_mode))) {
 456                         DEBUG(5,("check_share_mode: Failing open on file %s as delete access requests conflict.\n",
 457                                 fname ));
 458                         unix_ERR_class = ERRDOS;
 459                         unix_ERR_code = ERRbadshare;
 460                         unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
 461
 462                         return False;
 463                 }
 464
 465                 DEBUG(5,("check_share_mode: Allowing open on file %s as both desired access (0x%x) \
 466 and existing desired access (0x%x) are non-data opens\n",
 467                         fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
 468                 return True;
 469         }
 470
 471         /*
 472          * If delete access was requested and the existing share mode doesn't have
 473          * ALLOW_SHARE_DELETE then deny.
 474          */
 475
 476         if ((desired_access & DELETE_ACCESS) && !GET_ALLOW_SHARE_DELETE(share->share_mode)) {
 477                 DEBUG(5,("check_share_mode: Failing open on file %s as delete access requested and allow share delete not set.\n",
 478                         fname ));
 479                 unix_ERR_class = ERRDOS;
 480                 unix_ERR_code = ERRbadshare;
 481                 unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
 482
 483                 return False;
 484         }
 485
 486         /*
 487          * The inverse of the above.
 488          * If delete access was granted and the new share mode doesn't have
 489          * ALLOW_SHARE_DELETE then deny.
 490          */
 491
 492         if ((share->desired_access & DELETE_ACCESS) && !GET_ALLOW_SHARE_DELETE(share_mode)) {
 493                 DEBUG(5,("check_share_mode: Failing open on file %s as delete access granted and allow share delete not requested.\n",
 494                         fname ));
 495                 unix_ERR_class = ERRDOS;
 496                 unix_ERR_code = ERRbadshare;
 497                 unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
 498
 499                 return False;
 500         }
 501
 502         /*
 503          * If desired_access doesn't contain READ_DATA,WRITE_DATA,APPEND_DATA or EXECUTE
 504          * then share modes don't conflict. Likewise with existing desired access.
 505          */
 506
 507         if ( !(desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 508                 !(share->desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ) {
 509                 DEBUG(5,("check_share_mode: Allowing open on file %s as desired access (0x%x) doesn't conflict with\
 510 existing desired access (0x%x).\n", fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
 511                 return True;
 512         }
 513
 514         {
 515                 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
 516                                                 (share->pid == sys_getpid()),is_executable(fname));
 517
 518                 if ((access_allowed == AFAIL) ||
 519                         (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
 520                         (access_allowed == AREAD && *flags != O_RDONLY) ||
 521                         (access_allowed == AWRITE && *flags != O_WRONLY)) {
 522
 523                         DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
 524                                 deny_mode,old_deny_mode,old_open_mode,
 525                                 (int)share->pid,fname, fcbopen, *flags, access_allowed));
 526
 527                         unix_ERR_class = ERRDOS;
 528                         unix_ERR_code = ERRbadshare;
 529                         unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
 530
 531                         return False;
 532                 }
 533
 534                 if (access_allowed == AREAD)
 535                         *flags = O_RDONLY;
 536
 537                 if (access_allowed == AWRITE)
 538                         *flags = O_WRONLY;
 539
 540         }
 541
 542         return True;
 543 }
 544
 545
 546 #if defined(DEVELOPER)
 547 static void validate_my_share_entries(int num, share_mode_entry *share_entry)
 548 {
 549         files_struct *fsp;
 550
 551         if (share_entry->pid != sys_getpid())
 552                 return;
 553
 554         fsp = file_find_dif(share_entry->dev, share_entry->inode, share_entry->share_file_id);
 555         if (!fsp) {
 556                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n", share_mode_str(num, share_entry) ));
 557                 smb_panic("validate_my_share_entries: Cannot match a share entry with an open file\n");
 558         }
 559
 560         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 561                 pstring str;
 562                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n", share_mode_str(num, share_entry) ));
 563                 slprintf(str, sizeof(str)-1, "validate_my_share_entries: file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 564                                 fsp->fsp_name, (unsigned int)fsp->oplock_type, (unsigned int)share_entry->op_type );
 565                 smb_panic(str);
 566         }
 567 }
 568 #endif
 569
 570 /****************************************************************************
 571  Deal with open deny mode and oplock break processing.
 572  Invarient: Share mode must be locked on entry and exit.
 573  Returns -1 on error, or number of share modes on success (may be zero).
 574 ****************************************************************************/
 575
 576 static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
 577                            SMB_INO_T inode,
 578                            uint32 desired_access,
 579                            int share_mode, int *p_flags, int *p_oplock_request,
 580                            BOOL *p_all_current_opens_are_level_II)
 581 {
 582         int i;
 583         int num_share_modes;
 584         int oplock_contention_count = 0;
 585         share_mode_entry *old_shares = 0;
 586         BOOL fcbopen = False;
 587         BOOL broke_oplock;
 588
 589         if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
 590                 fcbopen = True;
 591
 592         num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
 593
 594         if(num_share_modes == 0)
 595                 return 0;
 596
 597         /*
 598          * Check if the share modes will give us access.
 599          */
 600
 601         do {
 602                 share_mode_entry broken_entry;
 603
 604                 broke_oplock = False;
 605                 *p_all_current_opens_are_level_II = True;
 606
 607                 for(i = 0; i < num_share_modes; i++) {
 608                         share_mode_entry *share_entry = &old_shares[i];
 609
 610 #if defined(DEVELOPER)
 611                         validate_my_share_entries(i, share_entry);
 612 #endif
 613
 614                         /*
 615                          * By observation of NetBench, oplocks are broken *before* share
 616                          * modes are checked. This allows a file to be closed by the client
 617                          * if the share mode would deny access and the client has an oplock.
 618                          * Check if someone has an oplock on this file. If so we must break
 619                          * it before continuing.
 620                          */
 621
 622                         if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
 623                            (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
 624
 625                                 BOOL opb_ret;
 626
 627                                 DEBUG(5,("open_mode_check: oplock_request = %d, breaking oplock (%x) on file %s, \
 628 dev = %x, inode = %.0f\n", *p_oplock_request, share_entry->op_type, fname, (unsigned int)dev, (double)inode));
 629
 630                                 /* Ensure the reply for the open uses the correct sequence number. */
 631                                 /* This isn't a real deferred packet as it's response will also increment
 632                                  * the sequence.
 633                                  */
 634                                 srv_defer_sign_response(get_current_mid());
 635
 636                                 /* Oplock break - unlock to request it. */
 637                                 unlock_share_entry(conn, dev, inode);
 638
 639                                 opb_ret = request_oplock_break(share_entry, False);
 640
 641                                 /* Now relock. */
 642                                 lock_share_entry(conn, dev, inode);
 643
 644                                 if(opb_ret == False) {
 645                                         DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
 646 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
 647                                         SAFE_FREE(old_shares);
 648                                         errno = EACCES;
 649                                         unix_ERR_class = ERRDOS;
 650                                         unix_ERR_code = ERRbadshare;
 651                                         unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
 652                                         return -1;
 653                                 }
 654
 655                                 broke_oplock = True;
 656                                 broken_entry = *share_entry;
 657                                 break;
 658
 659                         } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
 660                                 *p_all_current_opens_are_level_II = False;
 661                         }
 662
 663                         /* someone else has a share lock on it, check to see if we can too */
 664                         if (!check_share_mode(conn, share_entry, share_mode, desired_access,
 665                                                 fname, fcbopen, p_flags)) {
 666                                 SAFE_FREE(old_shares);
 667                                 errno = EACCES;
 668                                 return -1;
 669                         }
 670
 671                 } /* end for */
 672
 673                 if(broke_oplock) {
 674                         SAFE_FREE(old_shares);
 675                         num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
 676                         oplock_contention_count++;
 677
 678                         /* Paranoia check that this is no longer an exlusive entry. */
 679                         for(i = 0; i < num_share_modes; i++) {
 680                                 share_mode_entry *share_entry = &old_shares[i];
 681
 682                                 if (share_modes_identical(&broken_entry, share_entry) &&
 683                                     EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type) ) {
 684
 685                                         /*
 686                                          * This should not happen. The target left this oplock
 687                                          * as exlusive.... The process *must* be dead....
 688                                          */
 689
 690                                         DEBUG(0,("open_mode_check: exlusive oplock left by process %d after break ! For file %s, \
 691 dev = %x, inode = %.0f. Deleting it to continue...\n", (int)broken_entry.pid, fname, (unsigned int)dev, (double)inode));
 692
 693                                         if (process_exists(broken_entry.pid)) {
 694                                                 DEBUG(0,("open_mode_check: Existent process %lu left active oplock.\n",
 695                                                          (unsigned long)broken_entry.pid ));
 696                                         }
 697
 698                                         if (del_share_entry(dev, inode, &broken_entry, NULL) == -1) {
 699                                                 errno = EACCES;
 700                                                 unix_ERR_class = ERRDOS;
 701                                                 unix_ERR_code = ERRbadshare;
 702                                                 unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
 703                                                 return -1;
 704                                         }
 705
 706                                         /*
 707                                          * We must reload the share modes after deleting the
 708                                          * other process's entry.
 709                                          */
 710
 711                                         SAFE_FREE(old_shares);
 712                                         num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
 713                                         break;
 714                                 }
 715                         } /* end for paranoia... */
 716                 } /* end if broke_oplock */
 717
 718         } while(broke_oplock);
 719
 720         if(old_shares != 0)
 721                 SAFE_FREE(old_shares);
 722
 723         /*
 724          * Refuse to grant an oplock in case the contention limit is
 725          * reached when going through the lock list multiple times.
 726          */
 727
 728         if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
 729                 *p_oplock_request = 0;
 730                 DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
 731                          oplock_contention_count ));
 732         }
 733
 734         return num_share_modes;
 735 }
 736
 737 /****************************************************************************
 738 set a kernel flock on a file for NFS interoperability
 739 this requires a patch to Linux
 740 ****************************************************************************/
 741 static void kernel_flock(files_struct *fsp, int deny_mode)
 742 {
 743 #if HAVE_KERNEL_SHARE_MODES
 744         int kernel_mode = 0;
 745         if (deny_mode == DENY_READ) kernel_mode = LOCK_MAND|LOCK_WRITE;
 746         else if (deny_mode == DENY_WRITE) kernel_mode = LOCK_MAND|LOCK_READ;
 747         else if (deny_mode == DENY_ALL) kernel_mode = LOCK_MAND;
 748         if (kernel_mode) flock(fsp->fd, kernel_mode);
 749 #endif
 750         ;;
 751 }
 752
 753
 754 static BOOL open_match_attributes(connection_struct *conn, char *path, mode_t existing_mode,
 755                 mode_t new_mode, mode_t *returned_mode)
 756 {
 757         uint32 old_dos_mode, new_dos_mode;
 758         uint32 noarch_old_dos_mode, noarch_new_dos_mode;
 759         SMB_STRUCT_STAT sbuf;
 760
 761         ZERO_STRUCT(sbuf);
 762
 763         sbuf.st_mode = existing_mode;
 764         old_dos_mode = dos_mode(conn, path, &sbuf);
 765
 766         sbuf.st_mode = new_mode;
 767         new_dos_mode = dos_mode(conn, path, &sbuf);
 768
 769         noarch_old_dos_mode = (old_dos_mode & ~FILE_ATTRIBUTE_ARCHIVE);
 770         noarch_new_dos_mode = (new_dos_mode & ~FILE_ATTRIBUTE_ARCHIVE);
 771
 772         if((noarch_old_dos_mode == 0 && noarch_new_dos_mode != 0) ||
 773            (noarch_old_dos_mode != 0 && ((noarch_old_dos_mode & noarch_new_dos_mode) == noarch_old_dos_mode)))
 774                 *returned_mode = new_mode;
 775         else
 776                 *returned_mode = (mode_t)0;
 777
 778         DEBUG(10,("open_match_attributes: file %s old_dos_mode = 0x%x, existing_mode = 0%o, new_dos_mode = 0x%x returned_mode = 0%o\n",
 779                 path,
 780                 old_dos_mode, (unsigned int)existing_mode, new_dos_mode, (unsigned int)*returned_mode ));
 781
 782         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
 783         if (lp_map_system(SNUM(conn))) {
 784                 if ((old_dos_mode & FILE_ATTRIBUTE_SYSTEM) && !(new_dos_mode & FILE_ATTRIBUTE_SYSTEM))
 785                         return False;
 786         }
 787         if (lp_map_hidden(SNUM(conn))) {
 788                 if ((old_dos_mode & FILE_ATTRIBUTE_HIDDEN) && !(new_dos_mode & FILE_ATTRIBUTE_HIDDEN))
 789                         return False;
 790         }
 791         return True;
 792 }
 793
 794 /****************************************************************************
 795  Open a file with a share mode.
 796 ****************************************************************************/
 797
 798 files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
 799                                int share_mode,int ofun, mode_t mode,int oplock_request,
 800                                int *Access,int *action)
 801 {
 802         return open_file_shared1(conn, fname, psbuf, 0, share_mode, ofun, mode,
 803                                  oplock_request, Access, action);
 804 }
 805
 806 /****************************************************************************
 807  Open a file with a share mode.
 808 ****************************************************************************/
 809
 810 files_struct *open_file_shared1(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
 811                                 uint32 desired_access,
 812                                 int share_mode,int ofun, mode_t mode,int oplock_request,
 813                                 int *Access,int *action)
 814 {
 815         int flags=0;
 816         int flags2=0;
 817         int deny_mode = GET_DENY_MODE(share_mode);
 818         BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
 819         BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
 820         BOOL file_existed = VALID_STAT(*psbuf);
 821         BOOL fcbopen = False;
 822         BOOL def_acl = False;
 823         SMB_DEV_T dev = 0;
 824         SMB_INO_T inode = 0;
 825         int num_share_modes = 0;
 826         BOOL all_current_opens_are_level_II = False;
 827         BOOL fsp_open = False;
 828         files_struct *fsp = NULL;
 829         int open_mode=0;
 830         uint16 port = 0;
 831         mode_t new_mode = (mode_t)0;
 832
 833         if (conn->printer) {
 834                 /* printers are handled completely differently. Most of the passed parameters are
 835                         ignored */
 836                 if (Access)
 837                         *Access = DOS_OPEN_WRONLY;
 838                 if (action)
 839                         *action = FILE_WAS_CREATED;
 840                 return print_fsp_open(conn, fname);
 841         }
 842
 843         fsp = file_new(conn);
 844         if(!fsp)
 845                 return NULL;
 846
 847         DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
 848                 fname, share_mode, ofun, (int)mode,  oplock_request ));
 849
 850         if (!check_name(fname,conn)) {
 851                 file_free(fsp);
 852                 return NULL;
 853         }
 854
 855         /* ignore any oplock requests if oplocks are disabled */
 856         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
 857                 oplock_request = 0;
 858         }
 859
 860         /* this is for OS/2 EAs - try and say we don't support them */
 861         if (strstr(fname,".+,;=[].")) {
 862                 unix_ERR_class = ERRDOS;
 863                 /* OS/2 Workplace shell fix may be main code stream in a later release. */
 864 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
 865                 unix_ERR_code = ERRcannotopen;
 866 #else /* OS2_WPS_FIX */
 867                 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
 868 #endif /* OS2_WPS_FIX */
 869
 870                 DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
 871                 file_free(fsp);
 872                 return NULL;
 873         }
 874
 875         if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed)  {
 876                 DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
 877                         fname ));
 878                 file_free(fsp);
 879                 errno = EEXIST;
 880                 return NULL;
 881         }
 882
 883         if (CAN_WRITE(conn) && (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST))
 884                 flags2 |= O_CREAT;
 885
 886         if (CAN_WRITE(conn) && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE))
 887                 flags2 |= O_TRUNC;
 888
 889         /* We only care about matching attributes on file exists and truncate. */
 890         if (file_existed && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)) {
 891                 if (!open_match_attributes(conn, fname, psbuf->st_mode, mode, &new_mode)) {
 892                         DEBUG(5,("open_file_shared: attributes missmatch for file %s (0%o, 0%o)\n",
 893                                                 fname, (int)psbuf->st_mode, (int)mode ));
 894                         file_free(fsp);
 895                         errno = EACCES;
 896                         return NULL;
 897                 }
 898         }
 899
 900         if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
 901                 flags2 |= O_EXCL;
 902
 903         /* note that we ignore the append flag as
 904                 append does not mean the same thing under dos and unix */
 905
 906         switch (GET_OPEN_MODE(share_mode)) {
 907                 case DOS_OPEN_WRONLY:
 908                         flags = O_WRONLY;
 909                         if (desired_access == 0)
 910                                 desired_access = FILE_WRITE_DATA;
 911                         break;
 912                 case DOS_OPEN_FCB:
 913                         fcbopen = True;
 914                         flags = O_RDWR;
 915                         if (desired_access == 0)
 916                                 desired_access = FILE_READ_DATA|FILE_WRITE_DATA;
 917                         break;
 918                 case DOS_OPEN_RDWR:
 919                         flags = O_RDWR;
 920                         if (desired_access == 0)
 921                                 desired_access = FILE_READ_DATA|FILE_WRITE_DATA;
 922                         break;
 923                 default:
 924                         flags = O_RDONLY;
 925                         if (desired_access == 0)
 926                                 desired_access = FILE_READ_DATA;
 927                         break;
 928         }
 929
 930 #if defined(O_SYNC)
 931         if (GET_FILE_SYNC_OPENMODE(share_mode)) {
 932                 flags2 |= O_SYNC;
 933         }
 934 #endif /* O_SYNC */
 935
 936         if (flags != O_RDONLY && file_existed &&
 937                         (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,psbuf)))) {
 938                 if (!fcbopen) {
 939                         DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
 940                                 fname, !CAN_WRITE(conn) ? "share" : "file" ));
 941                         file_free(fsp);
 942                         errno = EACCES;
 943                         return NULL;
 944                 }
 945                 flags = O_RDONLY;
 946         }
 947
 948         if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
 949                 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
 950                 file_free(fsp);
 951                 errno = EINVAL;
 952                 return NULL;
 953         }
 954
 955         if (file_existed) {
 956
 957                 dev = psbuf->st_dev;
 958                 inode = psbuf->st_ino;
 959
 960                 lock_share_entry(conn, dev, inode);
 961
 962                 num_share_modes = open_mode_check(conn, fname, dev, inode,
 963                                                   desired_access,
 964                                                   share_mode,
 965                                                   &flags, &oplock_request, &all_current_opens_are_level_II);
 966                 if(num_share_modes == -1) {
 967
 968                         /*
 969                          * This next line is a subtlety we need for MS-Access. If a file open will
 970                          * fail due to share permissions and also for security (access)
 971                          * reasons, we need to return the access failed error, not the
 972                          * share error. This means we must attempt to open the file anyway
 973                          * in order to get the UNIX access error - even if we're going to
 974                          * fail the open for share reasons. This is bad, as we're burning
 975                          * another fd if there are existing locks but there's nothing else
 976                          * we can do. We also ensure we're not going to create or tuncate
 977                          * the file as we only want an access decision at this stage. JRA.
 978                          */
 979                         errno = 0;
 980                         fsp_open = open_file(fsp,conn,fname,psbuf,
 981                                                 flags|(flags2&~(O_TRUNC|O_CREAT)),mode,desired_access);
 982
 983                         DEBUG(4,("open_file_shared : share_mode deny - calling open_file with \
 984 flags=0x%X flags2=0x%X mode=0%o returned %d\n",
 985                                 flags,(flags2&~(O_TRUNC|O_CREAT)),(int)mode,(int)fsp_open ));
 986
 987                         if (!fsp_open && errno) {
 988                                 unix_ERR_class = ERRDOS;
 989                                 unix_ERR_code = ERRnoaccess;
 990                                 unix_ERR_ntstatus = NT_STATUS_ACCESS_DENIED;
 991                         }
 992
 993                         unlock_share_entry(conn, dev, inode);
 994                         if (fsp_open)
 995                                 fd_close(conn, fsp);
 996                         file_free(fsp);
 997                         return NULL;
 998                 }
 999
1000                 /*
1001                  * We exit this block with the share entry *locked*.....
1002                  */
1003         }
1004
1005         /*
1006          * Ensure we pay attention to default ACLs on directories if required.
1007          */
1008
1009         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1010                         (def_acl = directory_has_default_acl(conn, parent_dirname(fname))))
1011                 mode = 0777;
1012
1013         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
1014                         flags,flags2,(int)mode));
1015
1016         /*
1017          * open_file strips any O_TRUNC flags itself.
1018          */
1019
1020         fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,mode,desired_access);
1021
1022         if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
1023                 if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode,desired_access)) == True)
1024                         flags = O_RDONLY;
1025         }
1026
1027         if (!fsp_open) {
1028                 if(file_existed)
1029                         unlock_share_entry(conn, dev, inode);
1030                 file_free(fsp);
1031                 return NULL;
1032         }
1033
1034         /*
1035          * Deal with the race condition where two smbd's detect the file doesn't
1036          * exist and do the create at the same time. One of them will win and
1037          * set a share mode, the other (ie. this one) should check if the
1038          * requested share mode for this create is allowed.
1039          */
1040
1041         if (!file_existed) {
1042
1043                 /*
1044                  * Now the file exists and fsp is successfully opened,
1045                  * fsp->dev and fsp->inode are valid and should replace the
1046                  * dev=0,inode=0 from a non existent file. Spotted by
1047                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1048                  */
1049
1050                 dev = fsp->dev;
1051                 inode = fsp->inode;
1052
1053                 lock_share_entry_fsp(fsp);
1054
1055                 num_share_modes = open_mode_check(conn, fname, dev, inode,
1056                                                   desired_access,
1057                                                   share_mode,
1058                                                   &flags, &oplock_request, &all_current_opens_are_level_II);
1059
1060                 if(num_share_modes == -1) {
1061                         unlock_share_entry_fsp(fsp);
1062                         fd_close(conn,fsp);
1063                         file_free(fsp);
1064                         return NULL;
1065                 }
1066
1067                 /*
1068                  * If there are any share modes set then the file *did*
1069                  * exist. Ensure we return the correct value for action.
1070                  */
1071
1072                 if (num_share_modes > 0)
1073                         file_existed = True;
1074
1075                 /*
1076                  * We exit this block with the share entry *locked*.....
1077                  */
1078         }
1079
1080         /* note that we ignore failure for the following. It is
1081            basically a hack for NFS, and NFS will never set one of
1082            these only read them. Nobody but Samba can ever set a deny
1083            mode and we have already checked our more authoritative
1084            locking database for permission to set this deny mode. If
1085            the kernel refuses the operations then the kernel is wrong */
1086         kernel_flock(fsp, deny_mode);
1087
1088         /*
1089          * At this point onwards, we can guarentee that the share entry
1090          * is locked, whether we created the file or not, and that the
1091          * deny mode is compatible with all current opens.
1092          */
1093
1094         /*
1095          * If requested, truncate the file.
1096          */
1097
1098         if (flags2&O_TRUNC) {
1099                 /*
1100                  * We are modifing the file after open - update the stat struct..
1101                  */
1102                 if ((truncate_unless_locked(conn,fsp) == -1) || (SMB_VFS_FSTAT(fsp,fsp->fd,psbuf)==-1)) {
1103                         unlock_share_entry_fsp(fsp);
1104                         fd_close(conn,fsp);
1105                         file_free(fsp);
1106                         return NULL;
1107                 }
1108         }
1109
1110         switch (flags) {
1111                 case O_RDONLY:
1112                         open_mode = DOS_OPEN_RDONLY;
1113                         break;
1114                 case O_RDWR:
1115                         open_mode = DOS_OPEN_RDWR;
1116                         break;
1117                 case O_WRONLY:
1118                         open_mode = DOS_OPEN_WRONLY;
1119                         break;
1120         }
1121
1122         fsp->share_mode = SET_DENY_MODE(deny_mode) |
1123                                                 SET_OPEN_MODE(open_mode) |
1124                                                 SET_ALLOW_SHARE_DELETE(allow_share_delete);
1125
1126         DEBUG(10,("open_file_shared : share_mode = %x\n", fsp->share_mode ));
1127
1128         if (Access)
1129                 (*Access) = open_mode;
1130
1131         if (action) {
1132                 if (file_existed && !(flags2 & O_TRUNC))
1133                         *action = FILE_WAS_OPENED;
1134                 if (!file_existed)
1135                         *action = FILE_WAS_CREATED;
1136                 if (file_existed && (flags2 & O_TRUNC))
1137                         *action = FILE_WAS_OVERWRITTEN;
1138         }
1139
1140         /*
1141          * Setup the oplock info in both the shared memory and
1142          * file structs.
1143          */
1144
1145         if(oplock_request && (num_share_modes == 0) &&
1146                         !IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
1147                 port = global_oplock_port;
1148         } else if (oplock_request && all_current_opens_are_level_II) {
1149                 port = global_oplock_port;
1150                 oplock_request = LEVEL_II_OPLOCK;
1151                 set_file_oplock(fsp, oplock_request);
1152         } else {
1153                 port = 0;
1154                 oplock_request = 0;
1155         }
1156
1157         set_share_mode(fsp, port, oplock_request);
1158
1159         if (delete_on_close) {
1160                 NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);
1161
1162                 if (NT_STATUS_V(result) !=  NT_STATUS_V(NT_STATUS_OK)) {
1163                         /* Remember to delete the mode we just added. */
1164                         del_share_mode(fsp, NULL);
1165                         unlock_share_entry_fsp(fsp);
1166                         fd_close(conn,fsp);
1167                         file_free(fsp);
1168                         return NULL;
1169                 }
1170         }
1171
1172         /*
1173          * Take care of inherited ACLs on created files - if default ACL not
1174          * selected.
1175          */
1176
1177         if (!file_existed && !def_acl) {
1178
1179                 int saved_errno = errno; /* We might get ENOSYS in the next call.. */
1180
1181                 if (SMB_VFS_FCHMOD_ACL(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
1182                         errno = saved_errno; /* Ignore ENOSYS */
1183
1184         } else if (new_mode) {
1185
1186                 int ret = -1;
1187
1188                 /* Attributes need changing. File already existed. */
1189
1190                 {
1191                         int saved_errno = errno; /* We might get ENOSYS in the next call.. */
1192                         ret = SMB_VFS_FCHMOD_ACL(fsp, fsp->fd, new_mode);
1193
1194                         if (ret == -1 && errno == ENOSYS) {
1195                                 errno = saved_errno; /* Ignore ENOSYS */
1196                         } else {
1197                                 DEBUG(5, ("open_file_shared: failed to reset attributes of file %s to 0%o\n",
1198                                         fname, (int)new_mode));
1199                                 ret = 0; /* Don't do the fchmod below. */
1200                         }
1201                 }
1202
1203                 if ((ret == -1) && (SMB_VFS_FCHMOD(fsp, fsp->fd, new_mode) == -1))
1204                         DEBUG(5, ("open_file_shared: failed to reset attributes of file %s to 0%o\n",
1205                                 fname, (int)new_mode));
1206         }
1207
1208         unlock_share_entry_fsp(fsp);
1209
1210         conn->num_files_open++;
1211
1212         return fsp;
1213 }
1214
1215 /****************************************************************************
1216  Open a file for for write to ensure that we can fchmod it.
1217 ****************************************************************************/
1218
1219 files_struct *open_file_fchmod(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
1220 {
1221         files_struct *fsp = NULL;
1222         BOOL fsp_open;
1223
1224         if (!VALID_STAT(*psbuf))
1225                 return NULL;
1226
1227         fsp = file_new(conn);
1228         if(!fsp)
1229                 return NULL;
1230
1231         /* note! we must use a non-zero desired access or we don't get
1232            a real file descriptor. Oh what a twisted web we weave. */
1233         fsp_open = open_file(fsp,conn,fname,psbuf,O_WRONLY,0,FILE_WRITE_DATA);
1234
1235         /*
1236          * This is not a user visible file open.
1237          * Don't set a share mode and don't increment
1238          * the conn->num_files_open.
1239          */
1240
1241         if (!fsp_open) {
1242                 file_free(fsp);
1243                 return NULL;
1244         }
1245
1246         return fsp;
1247 }
1248
1249 /****************************************************************************
1250  Close the fchmod file fd - ensure no locks are lost.
1251 ****************************************************************************/
1252
1253 int close_file_fchmod(files_struct *fsp)
1254 {
1255         int ret = fd_close(fsp->conn, fsp);
1256         file_free(fsp);
1257         return ret;
1258 }
1259
1260 /****************************************************************************
1261  Open a directory from an NT SMB call.
1262 ****************************************************************************/
1263
1264 files_struct *open_directory(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf,
1265                         uint32 desired_access, int share_mode, int smb_ofun, mode_t unixmode, int *action)
1266 {
1267         extern struct current_user current_user;
1268         BOOL got_stat = False;
1269         files_struct *fsp = file_new(conn);
1270         BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
1271
1272         if(!fsp)
1273                 return NULL;
1274
1275         if (VALID_STAT(*psbuf))
1276                 got_stat = True;
1277
1278         if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
1279                 file_free(fsp);
1280                 errno = EEXIST; /* Setup so correct error is returned to client. */
1281                 return NULL;
1282         }
1283
1284         if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
1285
1286                 if (got_stat) {
1287
1288                         if(!S_ISDIR(psbuf->st_mode)) {
1289                                 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1290                                 file_free(fsp);
1291                                 errno = EACCES;
1292                                 return NULL;
1293                         }
1294                         *action = FILE_WAS_OPENED;
1295
1296                 } else {
1297
1298                         /*
1299                          * Try and create the directory.
1300                          */
1301
1302                         if(!CAN_WRITE(conn)) {
1303                                 DEBUG(2,("open_directory: failing create on read-only share\n"));
1304                                 file_free(fsp);
1305                                 errno = EACCES;
1306                                 return NULL;
1307                         }
1308
1309                         if (ms_has_wild(fname))  {
1310                                 file_free(fsp);
1311                                 DEBUG(5,("open_directory: failing create on filename %s with wildcards\n", fname));
1312                                 unix_ERR_class = ERRDOS;
1313                                 unix_ERR_code = ERRinvalidname;
1314                                 unix_ERR_ntstatus = NT_STATUS_OBJECT_NAME_INVALID;
1315                                 return NULL;
1316                         }
1317
1318                         if(vfs_MkDir(conn,fname, unix_mode(conn,aDIR, fname)) < 0) {
1319                                 DEBUG(2,("open_directory: unable to create %s. Error was %s\n",
1320                                          fname, strerror(errno) ));
1321                                 file_free(fsp);
1322                                 return NULL;
1323                         }
1324
1325                         if(SMB_VFS_STAT(conn,fname, psbuf) != 0) {
1326                                 file_free(fsp);
1327                                 return NULL;
1328                         }
1329
1330                         *action = FILE_WAS_CREATED;
1331
1332                 }
1333         } else {
1334
1335                 /*
1336                  * Don't create - just check that it *was* a directory.
1337                  */
1338
1339                 if(!got_stat) {
1340                         DEBUG(3,("open_directory: unable to stat name = %s. Error was %s\n",
1341                                  fname, strerror(errno) ));
1342                         file_free(fsp);
1343                         return NULL;
1344                 }
1345
1346                 if(!S_ISDIR(psbuf->st_mode)) {
1347                         DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
1348                         file_free(fsp);
1349                         return NULL;
1350                 }
1351
1352                 *action = FILE_WAS_OPENED;
1353         }
1354
1355         DEBUG(5,("open_directory: opening directory %s\n", fname));
1356
1357         /*
1358          * Setup the files_struct for it.
1359          */
1360
1361         fsp->mode = psbuf->st_mode;
1362         fsp->inode = psbuf->st_ino;
1363         fsp->dev = psbuf->st_dev;
1364         fsp->size = psbuf->st_size;
1365         fsp->vuid = current_user.vuid;
1366         fsp->file_pid = global_smbpid;
1367         fsp->can_lock = True;
1368         fsp->can_read = False;
1369         fsp->can_write = False;
1370         fsp->share_mode = share_mode;
1371         fsp->desired_access = desired_access;
1372         fsp->print_file = False;
1373         fsp->modified = False;
1374         fsp->oplock_type = NO_OPLOCK;
1375         fsp->sent_oplock_break = NO_BREAK_SENT;
1376         fsp->is_directory = True;
1377         fsp->is_stat = False;
1378         fsp->directory_delete_on_close = False;
1379         string_set(&fsp->fsp_name,fname);
1380
1381         if (delete_on_close) {
1382                 NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);
1383
1384                 if (NT_STATUS_V(result) !=  NT_STATUS_V(NT_STATUS_OK)) {
1385                         file_free(fsp);
1386                         return NULL;
1387                 }
1388         }
1389         conn->num_files_open++;
1390
1391         return fsp;
1392 }
1393
1394 /****************************************************************************
1395  Open a pseudo-file (no locking checks - a 'stat' open).
1396 ****************************************************************************/
1397
1398 files_struct *open_file_stat(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf)
1399 {
1400         extern struct current_user current_user;
1401         files_struct *fsp = NULL;
1402
1403         if (!VALID_STAT(*psbuf))
1404                 return NULL;
1405
1406         /* Can't 'stat' open directories. */
1407         if(S_ISDIR(psbuf->st_mode))
1408                 return NULL;
1409
1410         fsp = file_new(conn);
1411         if(!fsp)
1412                 return NULL;
1413
1414         DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));
1415
1416         /*
1417          * Setup the files_struct for it.
1418          */
1419
1420         fsp->mode = psbuf->st_mode;
1421         /*
1422          * Don't store dev or inode, we don't want any iterator
1423          * to see this.
1424          */
1425         fsp->inode = (SMB_INO_T)0;
1426         fsp->dev = (SMB_DEV_T)0;
1427         fsp->size = psbuf->st_size;
1428         fsp->vuid = current_user.vuid;
1429         fsp->file_pid = global_smbpid;
1430         fsp->can_lock = False;
1431         fsp->can_read = False;
1432         fsp->can_write = False;
1433         fsp->share_mode = 0;
1434         fsp->desired_access = 0;
1435         fsp->print_file = False;
1436         fsp->modified = False;
1437         fsp->oplock_type = NO_OPLOCK;
1438         fsp->sent_oplock_break = NO_BREAK_SENT;
1439         fsp->is_directory = False;
1440         fsp->is_stat = True;
1441         fsp->directory_delete_on_close = False;
1442         string_set(&fsp->fsp_name,fname);
1443
1444         conn->num_files_open++;
1445
1446         return fsp;
1447 }