2 Unix SMB/Netbios implementation.
4 file opening and share modes
5 Copyright (C) Andrew Tridgell 1992-1998
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.
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.
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.
24 extern int DEBUGLEVEL;
26 extern pstring sesssetup_user;
27 extern int global_oplocks_open;
28 extern uint16 oplock_port;
31 /****************************************************************************
32 fd support routines - attempt to do a dos_open
33 ****************************************************************************/
34 static int fd_attempt_open(char *fname, int flags, int mode)
36 int fd = dos_open(fname,flags,mode);
38 /* Fix for files ending in '.' */
39 if((fd == -1) && (errno == ENOENT) &&
40 (strchr(fname,'.')==NULL))
43 fd = dos_open(fname,flags,mode);
46 #if (defined(ENAMETOOLONG) && defined(HAVE_PATHCONF))
47 if ((fd == -1) && (errno == ENAMETOOLONG))
50 char *p = strrchr(fname, '/');
52 if (p == fname) /* name is "/xxx" */
54 max_len = pathconf("/", _PC_NAME_MAX);
57 else if ((p == NULL) || (p == fname))
60 max_len = pathconf(".", _PC_NAME_MAX);
65 max_len = pathconf(fname, _PC_NAME_MAX);
69 if (strlen(p) > max_len)
71 char tmp = p[max_len];
74 if ((fd = dos_open(fname,flags,mode)) == -1)
82 /****************************************************************************
83 Cache a uid_t currently with this file open. This is an optimization only
84 used when multiple sessionsetup's have been done to one smbd.
85 ****************************************************************************/
86 void fd_add_to_uid_cache(file_fd_struct *fd_ptr, uid_t u)
88 if(fd_ptr->uid_cache_count >= sizeof(fd_ptr->uid_users_cache)/sizeof(uid_t))
90 fd_ptr->uid_users_cache[fd_ptr->uid_cache_count++] = u;
93 /****************************************************************************
94 Remove a uid_t that currently has this file open. This is an optimization only
95 used when multiple sessionsetup's have been done to one smbd.
96 ****************************************************************************/
97 static void fd_remove_from_uid_cache(file_fd_struct *fd_ptr, uid_t u)
100 for(i = 0; i < fd_ptr->uid_cache_count; i++)
101 if(fd_ptr->uid_users_cache[i] == u) {
102 if(i < (fd_ptr->uid_cache_count-1))
103 memmove((char *)&fd_ptr->uid_users_cache[i], (char *)&fd_ptr->uid_users_cache[i+1],
104 sizeof(uid_t)*(fd_ptr->uid_cache_count-1-i) );
105 fd_ptr->uid_cache_count--;
110 /****************************************************************************
111 Check if a uid_t that currently has this file open is present. This is an
112 optimization only used when multiple sessionsetup's have been done to one smbd.
113 ****************************************************************************/
114 static BOOL fd_is_in_uid_cache(file_fd_struct *fd_ptr, uid_t u)
117 for(i = 0; i < fd_ptr->uid_cache_count; i++)
118 if(fd_ptr->uid_users_cache[i] == u)
124 /****************************************************************************
125 fd support routines - attempt to re-open an already open fd as O_RDWR.
126 Save the already open fd (we cannot close due to POSIX file locking braindamage.
127 ****************************************************************************/
128 static void fd_attempt_reopen(char *fname, int mode, file_fd_struct *fd_ptr)
130 int fd = dos_open( fname, O_RDWR, mode);
135 if(fd_ptr->real_open_flags == O_RDONLY)
136 fd_ptr->fd_readonly = fd_ptr->fd;
137 if(fd_ptr->real_open_flags == O_WRONLY)
138 fd_ptr->fd_writeonly = fd_ptr->fd;
141 fd_ptr->real_open_flags = O_RDWR;
144 /****************************************************************************
145 fd support routines - attempt to close the file referenced by this fd.
146 Decrements the ref_count and returns it.
147 ****************************************************************************/
148 uint16 fd_attempt_close(file_fd_struct *fd_ptr)
150 extern struct current_user current_user;
151 uint16 ret_ref = fd_ptr->ref_count;
153 DEBUG(3,("fd_attempt_close fd = %d, dev = %x, inode = %.0f, open_flags = %d, ref_count = %d.\n",
154 fd_ptr->fd, (unsigned int)fd_ptr->dev, (double)fd_ptr->inode,
155 fd_ptr->real_open_flags,
158 SMB_ASSERT(fd_ptr->ref_count != 0);
161 ret_ref = fd_ptr->ref_count;
163 if(fd_ptr->ref_count == 0) {
166 if(fd_ptr->fd_readonly != -1)
167 close(fd_ptr->fd_readonly);
168 if(fd_ptr->fd_writeonly != -1)
169 close(fd_ptr->fd_writeonly);
171 * Delete this fd_ptr.
175 fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid);
181 /****************************************************************************
182 fd support routines - check that current user has permissions
183 to open this file. Used when uid not found in optimization cache.
184 This is really ugly code, as due to POSIX locking braindamage we must
185 fork and then attempt to open the file, and return success or failure
187 ****************************************************************************/
188 static BOOL check_access_allowed_for_current_user( char *fname, int accmode )
192 if((child_pid = fork()) < 0) {
193 DEBUG(0,("check_access_allowed_for_current_user: fork failed.\n"));
203 if ((wpid = sys_waitpid(child_pid, &status_code, 0)) < 0) {
204 DEBUG(0,("check_access_allowed_for_current_user: The process is no longer waiting!\n"));
208 if (child_pid != wpid) {
209 DEBUG(0,("check_access_allowed_for_current_user: We were waiting for the wrong process ID\n"));
212 #if defined(WIFEXITED) && defined(WEXITSTATUS)
213 if (WIFEXITED(status_code) == 0) {
214 DEBUG(0,("check_access_allowed_for_current_user: The process exited while we were waiting\n"));
217 if (WEXITSTATUS(status_code) != 0) {
218 DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access denied.\n", status_code));
221 #else /* defined(WIFEXITED) && defined(WEXITSTATUS) */
222 if(status_code != 0) {
223 DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access denied.\n", status_code));
226 #endif /* defined(WIFEXITED) && defined(WEXITSTATUS) */
229 * Success - the child could open the file.
231 DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access allowed.\n", status_code));
238 DEBUG(9,("check_access_allowed_for_current_user: Child - attempting to open %s with mode %d.\n", fname, accmode ));
239 if((fd = fd_attempt_open( fname, accmode, 0)) < 0) {
244 DEBUG(9,("check_access_allowed_for_current_user: Child - returning ok.\n"));
251 /****************************************************************************
252 check a filename for the pipe string
253 ****************************************************************************/
254 static void check_for_pipe(char *fname)
256 /* special case of pipe opens */
260 if (strstr(s,"pipe/")) {
261 DEBUG(3,("Rejecting named pipe open for %s\n",fname));
262 unix_ERR_class = ERRSRV;
263 unix_ERR_code = ERRaccess;
267 /****************************************************************************
269 ****************************************************************************/
270 static void open_file(files_struct *fsp,connection_struct *conn,
271 char *fname1,int flags,int mode, SMB_STRUCT_STAT *sbuf)
273 extern struct current_user current_user;
275 SMB_STRUCT_STAT statbuf;
276 file_fd_struct *fd_ptr;
277 int accmode = (flags & (O_RDONLY | O_WRONLY | O_RDWR));
281 fsp->granted_oplock = False;
284 pstrcpy(fname,fname1);
286 /* check permissions */
289 * This code was changed after seeing a client open request
290 * containing the open mode of (DENY_WRITE/read-only) with
291 * the 'create if not exist' bit set. The previous code
292 * would fail to open the file read only on a read-only share
293 * as it was checking the flags parameter directly against O_RDONLY,
294 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
298 if (conn->read_only && !conn->printer) {
299 /* It's a read-only share - fail if we wanted to write. */
300 if(accmode != O_RDONLY) {
301 DEBUG(3,("Permission denied opening %s\n",fname));
302 check_for_pipe(fname);
304 } else if(flags & O_CREAT) {
305 /* We don't want to write - but we must make sure that O_CREAT
306 doesn't create the file if we have write access into the
313 /* this handles a bug in Win95 - it doesn't say to create the file when it
320 if (flags == O_WRONLY)
321 DEBUG(3,("Bug in client? Set O_WRONLY without O_CREAT\n"));
325 * Ensure we have a valid struct stat so we can search the
329 if(dos_stat(fname, &statbuf) < 0) {
330 if(errno != ENOENT) {
331 DEBUG(3,("Error doing stat on file %s (%s)\n",
332 fname,strerror(errno)));
334 check_for_pipe(fname);
344 * Check to see if we have this file already
345 * open. If we do, just use the already open fd and increment the
346 * reference count (fd_get_already_open increments the ref_count).
348 if((fd_ptr = fd_get_already_open(sbuf))!= 0) {
350 * File was already open.
354 * Check it wasn't open for exclusive use.
356 if((flags & O_CREAT) && (flags & O_EXCL)) {
363 * Ensure that the user attempting to open
364 * this file has permissions to do so, if
365 * the user who originally opened the file wasn't
366 * the same as the current user.
369 if(!fd_is_in_uid_cache(fd_ptr, (uid_t)current_user.uid)) {
370 if(!check_access_allowed_for_current_user( fname, accmode )) {
371 /* Error - permission denied. */
372 DEBUG(3,("Permission denied opening file %s (flags=%d, accmode = %d)\n",
373 fname, flags, accmode));
374 /* Ensure the ref_count is decremented. */
376 fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid);
382 fd_add_to_uid_cache(fd_ptr, (uid_t)current_user.uid);
385 * If not opened O_RDWR try
386 * and do that here - a chmod may have been done
387 * between the last open and now.
389 if(fd_ptr->real_open_flags != O_RDWR)
390 fd_attempt_reopen(fname, mode, fd_ptr);
393 * Ensure that if we wanted write access
394 * it has been opened for write, and if we wanted read it
397 if(((accmode == O_WRONLY) && (fd_ptr->real_open_flags == O_RDONLY)) ||
398 ((accmode == O_RDONLY) && (fd_ptr->real_open_flags == O_WRONLY)) ||
399 ((accmode == O_RDWR) && (fd_ptr->real_open_flags != O_RDWR))) {
400 DEBUG(3,("Error opening (already open for flags=%d) file %s (%s) (flags=%d)\n",
401 fd_ptr->real_open_flags, fname,strerror(EACCES),flags));
402 check_for_pipe(fname);
403 fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid);
410 /* We need to allocate a new file_fd_struct (this increments the
412 if((fd_ptr = fd_get_new()) == 0)
415 * Whatever the requested flags, attempt read/write access,
416 * as we don't know what flags future file opens may require.
417 * If this fails, try again with the required flags.
418 * Even if we open read/write when only read access was
419 * requested the setting of the can_write flag in
420 * the file_struct will protect us from errant
421 * write requests. We never need to worry about O_APPEND
422 * as this is not set anywhere in Samba.
424 fd_ptr->real_open_flags = O_RDWR;
425 /* Set the flags as needed without the read/write modes. */
426 open_flags = flags & ~(O_RDWR|O_WRONLY|O_RDONLY);
427 fd_ptr->fd = fd_attempt_open(fname, open_flags|O_RDWR, mode);
429 * On some systems opening a file for R/W access on a read only
430 * filesystems sets errno to EROFS.
433 if((fd_ptr->fd == -1) && ((errno == EACCES) || (errno == EROFS))) {
435 if((fd_ptr->fd == -1) && (errno == EACCES)) {
437 if(accmode != O_RDWR) {
438 fd_ptr->fd = fd_attempt_open(fname, open_flags|accmode, mode);
439 fd_ptr->real_open_flags = accmode;
444 if ((fd_ptr->fd >=0) &&
445 conn->printer && lp_minprintspace(SNUM(conn))) {
449 pstrcpy(dname,fname);
450 p = strrchr(dname,'/');
452 if (sys_disk_free(dname,&dum1,&dum2,&dum3) <
453 lp_minprintspace(SNUM(conn))) {
454 if(fd_attempt_close(fd_ptr) == 0)
464 DEBUG(3,("Error opening file %s (%s) (flags=%d)\n",
465 fname,strerror(errno),flags));
466 /* Ensure the ref_count is decremented. */
467 fd_attempt_close(fd_ptr);
468 check_for_pipe(fname);
476 if(sys_fstat(fd_ptr->fd, &statbuf) == -1) {
477 /* Error - backout !! */
478 DEBUG(3,("Error doing fstat on fd %d, file %s (%s)\n",
479 fd_ptr->fd, fname,strerror(errno)));
480 /* Ensure the ref_count is decremented. */
481 fd_attempt_close(fd_ptr);
487 /* Set the correct entries in fd_ptr. */
488 fd_ptr->dev = sbuf->st_dev;
489 fd_ptr->inode = sbuf->st_ino;
491 fsp->fd_ptr = fd_ptr;
492 conn->num_files_open++;
493 fsp->mode = sbuf->st_mode;
494 GetTimeOfDay(&fsp->open_time);
495 fsp->vuid = current_user.vuid;
499 fsp->mmap_ptr = NULL;
501 fsp->can_lock = True;
502 fsp->can_read = ((flags & O_WRONLY)==0);
503 fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
505 fsp->print_file = conn->printer;
506 fsp->modified = False;
507 fsp->granted_oplock = False;
508 fsp->sent_oplock_break = False;
509 fsp->is_directory = False;
510 fsp->delete_on_close = False;
513 * Note that the file name here is the *untranslated* name
514 * ie. it is still in the DOS codepage sent from the client.
515 * All use of this filename will pass though the sys_xxxx
516 * functions which will do the dos_to_unix translation before
517 * mapping into a UNIX filename. JRA.
519 string_set(&fsp->fsp_name,fname);
520 fsp->wbmpx_ptr = NULL;
523 * If the printer is marked as postscript output a leading
524 * file identifier to ensure the file is treated as a raw
526 * This has a similar effect as CtrlD=0 in WIN.INI file.
527 * tim@fsg.com 09/06/94
529 if (fsp->print_file && lp_postscript(SNUM(conn)) && fsp->can_write) {
530 DEBUG(3,("Writing postscript line\n"));
531 write_file(fsp,"%!\n",3);
534 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
535 *sesssetup_user ? sesssetup_user : conn->user,fsp->fsp_name,
536 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
537 conn->num_files_open));
542 /* mmap it if read-only */
543 if (!fsp->can_write) {
544 fsp->mmap_size = file_size(fname);
545 fsp->mmap_ptr = (char *)mmap(NULL,fsp->mmap_size,
546 PROT_READ,MAP_SHARED,fsp->fd_ptr->fd,0);
548 if (fsp->mmap_ptr == (char *)-1 || !fsp->mmap_ptr) {
549 DEBUG(3,("Failed to mmap() %s - %s\n",
550 fname,strerror(errno)));
551 fsp->mmap_ptr = NULL;
558 /****************************************************************************
560 Helper for open_file_shared.
561 Truncate a file after checking locking; close file if locked.
562 **************************************************************************/
563 static void truncate_unless_locked(files_struct *fsp, connection_struct *conn, int token,
567 #ifdef LARGE_SMB_OFF_T
568 if (is_locked(fsp,conn,0x3FFFFFFFFFFFFFFFLL,0,F_WRLCK)){
570 if (is_locked(fsp,conn,0x3FFFFFFF,0,F_WRLCK)){
572 /* If share modes are in force for this connection we
573 have the share entry locked. Unlock it before closing. */
574 if (*share_locked && lp_share_modes(SNUM(conn)))
575 unlock_share_entry( conn, fsp->fd_ptr->dev,
576 fsp->fd_ptr->inode, token);
577 close_file(fsp,False);
578 /* Share mode no longer locked. */
579 *share_locked = False;
581 unix_ERR_class = ERRDOS;
582 unix_ERR_code = ERRlock;
585 sys_ftruncate(fsp->fd_ptr->fd,0);
590 enum {AFAIL,AREAD,AWRITE,AALL};
592 /*******************************************************************
593 reproduce the share mode access table
594 ********************************************************************/
595 static int access_table(int new_deny,int old_deny,int old_mode,
596 int share_pid,char *fname)
598 if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
600 if (new_deny == DENY_DOS || old_deny == DENY_DOS) {
602 if (old_deny == new_deny && share_pid == pid)
605 if (old_mode == 0) return(AREAD);
607 /* the new smbpub.zip spec says that if the file extension is
608 .com, .dll, .exe or .sym then allow the open. I will force
609 it to read-only as this seems sensible although the spec is
610 a little unclear on this. */
611 if ((fname = strrchr(fname,'.'))) {
612 if (strequal(fname,".com") ||
613 strequal(fname,".dll") ||
614 strequal(fname,".exe") ||
615 strequal(fname,".sym"))
625 if (old_deny==DENY_WRITE && old_mode==0) return(AREAD);
626 if (old_deny==DENY_READ && old_mode==0) return(AWRITE);
627 if (old_deny==DENY_NONE && old_mode==0) return(AALL);
630 if (old_deny==DENY_WRITE && old_mode==1) return(AREAD);
631 if (old_deny==DENY_READ && old_mode==1) return(AWRITE);
632 if (old_deny==DENY_NONE && old_mode==1) return(AALL);
635 if (old_deny==DENY_WRITE) return(AREAD);
636 if (old_deny==DENY_READ) return(AWRITE);
637 if (old_deny==DENY_NONE) return(AALL);
644 /****************************************************************************
645 check if we can open a file with a share mode
646 ****************************************************************************/
647 static int check_share_mode( share_mode_entry *share, int deny_mode,
649 BOOL fcbopen, int *flags)
651 int old_open_mode = share->share_mode &0xF;
652 int old_deny_mode = (share->share_mode >>4)&7;
654 if (old_deny_mode > 4 || old_open_mode > 2)
656 DEBUG(0,("Invalid share mode found (%d,%d,%d) on file %s\n",
657 deny_mode,old_deny_mode,old_open_mode,fname));
662 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
665 if ((access_allowed == AFAIL) ||
666 (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
667 (access_allowed == AREAD && *flags == O_WRONLY) ||
668 (access_allowed == AWRITE && *flags == O_RDONLY))
670 DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
671 deny_mode,old_deny_mode,old_open_mode,
672 share->pid,fname, fcbopen, *flags, access_allowed));
676 if (access_allowed == AREAD)
679 if (access_allowed == AWRITE)
687 /****************************************************************************
688 open a file with a share mode
689 ****************************************************************************/
690 void open_file_shared(files_struct *fsp,connection_struct *conn,char *fname,int share_mode,int ofun,
691 int mode,int oplock_request, int *Access,int *action)
695 int deny_mode = (share_mode>>4)&7;
696 SMB_STRUCT_STAT sbuf;
697 BOOL file_existed = file_exist(fname,&sbuf);
698 BOOL share_locked = False;
699 BOOL fcbopen = False;
703 int num_share_modes = 0;
708 /* this is for OS/2 EAs - try and say we don't support them */
709 if (strstr(fname,".+,;=[]."))
711 unix_ERR_class = ERRDOS;
712 /* OS/2 Workplace shell fix may be main code stream in a later release. */
713 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
714 unix_ERR_code = ERRcannotopen;
715 #else /* OS2_WPS_FIX */
716 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
717 #endif /* OS2_WPS_FIX */
722 if ((ofun & 0x3) == 0 && file_existed)
730 if ((ofun & 0x3) == 2)
733 /* note that we ignore the append flag as
734 append does not mean the same thing under dos and unix */
736 switch (share_mode&0xF)
754 if (share_mode&(1<<14)) {
759 if (flags != O_RDONLY && file_existed &&
760 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,&sbuf))))
770 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB)
772 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
777 if (deny_mode == DENY_FCB) deny_mode = DENY_DOS;
779 if (lp_share_modes(SNUM(conn)))
782 share_mode_entry *old_shares = 0;
788 lock_share_entry(conn, dev, inode, &token);
790 num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
794 * Check if the share modes will give us access.
797 if(share_locked && (num_share_modes != 0))
804 broke_oplock = False;
805 for(i = 0; i < num_share_modes; i++)
807 share_mode_entry *share_entry = &old_shares[i];
810 * By observation of NetBench, oplocks are broken *before* share
811 * modes are checked. This allows a file to be closed by the client
812 * if the share mode would deny access and the client has an oplock.
813 * Check if someone has an oplock on this file. If so we must break
814 * it before continuing.
816 if(share_entry->op_type & (EXCLUSIVE_OPLOCK|BATCH_OPLOCK))
819 DEBUG(5,("open_file_shared: breaking oplock (%x) on file %s, \
820 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
822 /* Oplock break.... */
823 unlock_share_entry(conn, dev, inode, token);
824 if(request_oplock_break(share_entry, dev, inode) == False)
826 free((char *)old_shares);
828 DEBUG(0,("open_file_shared: FAILED when breaking oplock (%x) on file %s, \
829 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
832 unix_ERR_class = ERRDOS;
833 unix_ERR_code = ERRbadshare;
836 lock_share_entry(conn, dev, inode, &token);
841 /* someone else has a share lock on it, check to see
843 if(check_share_mode(share_entry, deny_mode, fname, fcbopen, &flags) == False)
845 free((char *)old_shares);
846 unlock_share_entry(conn, dev, inode, token);
848 unix_ERR_class = ERRDOS;
849 unix_ERR_code = ERRbadshare;
857 free((char *)old_shares);
858 num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
860 } while(broke_oplock);
864 free((char *)old_shares);
867 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
870 open_file(fsp,conn,fname,flags|(flags2&~(O_TRUNC)),mode,file_existed ? &sbuf : 0);
871 if (!fsp->open && flags==O_RDWR && errno!=ENOENT && fcbopen)
874 open_file(fsp,conn,fname,flags,mode,file_existed ? &sbuf : 0 );
881 if((share_locked == False) && lp_share_modes(SNUM(conn)))
883 /* We created the file - thus we must now lock the share entry before creating it. */
884 dev = fsp->fd_ptr->dev;
885 inode = fsp->fd_ptr->inode;
886 lock_share_entry(conn, dev, inode, &token);
903 fsp->share_mode = (deny_mode<<4) | open_mode;
906 (*Access) = open_mode;
910 if (file_existed && !(flags2 & O_TRUNC)) *action = FILE_WAS_OPENED;
911 if (!file_existed) *action = FILE_WAS_CREATED;
912 if (file_existed && (flags2 & O_TRUNC)) *action = FILE_WAS_OVERWRITTEN;
914 /* We must create the share mode entry before truncate as
915 truncate can fail due to locking and have to close the
916 file (which expects the share_mode_entry to be there).
918 if (lp_share_modes(SNUM(conn)))
921 /* JRA. Currently this only services Exlcusive and batch
922 oplocks (no other opens on this file). This needs to
923 be extended to level II oplocks (multiple reader
926 if(oplock_request && (num_share_modes == 0) && lp_oplocks(SNUM(conn)) &&
927 !IS_VETO_OPLOCK_PATH(conn,fname))
929 fsp->granted_oplock = True;
930 fsp->sent_oplock_break = False;
931 global_oplocks_open++;
934 DEBUG(5,("open_file_shared: granted oplock (%x) on file %s, \
935 dev = %x, inode = %.0f\n", oplock_request, fname, (unsigned int)dev, (double)inode));
943 set_share_mode(token, fsp, port, oplock_request);
946 if ((flags2&O_TRUNC) && file_existed)
947 truncate_unless_locked(fsp,conn,token,&share_locked);
950 if (share_locked && lp_share_modes(SNUM(conn)))
951 unlock_share_entry( conn, dev, inode, token);
956 /****************************************************************************
957 Open a directory from an NT SMB call.
958 ****************************************************************************/
959 int open_directory(files_struct *fsp,connection_struct *conn,
960 char *fname, int smb_ofun, int unixmode, int *action)
962 extern struct current_user current_user;
965 if (smb_ofun & 0x10) {
967 * Create the directory.
970 if(dos_mkdir(fname, unixmode) < 0) {
971 DEBUG(0,("open_directory: unable to create %s. Error was %s\n",
972 fname, strerror(errno) ));
976 *action = FILE_WAS_CREATED;
979 * Check that it *was* a directory.
982 if(dos_stat(fname, &st) < 0) {
983 DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
984 fname, strerror(errno) ));
988 if(!S_ISDIR(st.st_mode)) {
989 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
992 *action = FILE_WAS_OPENED;
995 DEBUG(5,("open_directory: opening directory %s\n",
999 * Setup the files_struct for it.
1003 conn->num_files_open++;
1005 GetTimeOfDay(&fsp->open_time);
1006 fsp->vuid = current_user.vuid;
1010 fsp->mmap_ptr = NULL;
1012 fsp->can_lock = True;
1013 fsp->can_read = False;
1014 fsp->can_write = False;
1015 fsp->share_mode = 0;
1016 fsp->print_file = False;
1017 fsp->modified = False;
1018 fsp->granted_oplock = False;
1019 fsp->sent_oplock_break = False;
1020 fsp->is_directory = True;
1023 * Note that the file name here is the *untranslated* name
1024 * ie. it is still in the DOS codepage sent from the client.
1025 * All use of this filename will pass though the sys_xxxx
1026 * functions which will do the dos_to_unix translation before
1027 * mapping into a UNIX filename. JRA.
1029 string_set(&fsp->fsp_name,fname);
1030 fsp->wbmpx_ptr = NULL;
1036 /*******************************************************************
1037 check if the share mode on a file allows it to be deleted or unlinked
1038 return True if sharing doesn't prevent the operation
1039 ********************************************************************/
1040 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
1044 share_mode_entry *old_shares = 0;
1045 int num_share_modes;
1046 SMB_STRUCT_STAT sbuf;
1052 if(!lp_share_modes(SNUM(conn)))
1055 if (dos_stat(fname,&sbuf) == -1) return(True);
1058 inode = sbuf.st_ino;
1060 lock_share_entry(conn, dev, inode, &token);
1061 num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
1064 * Check if the share modes will give us access.
1067 if(num_share_modes != 0)
1074 broke_oplock = False;
1075 for(i = 0; i < num_share_modes; i++)
1077 share_mode_entry *share_entry = &old_shares[i];
1080 * Break oplocks before checking share modes. See comment in
1081 * open_file_shared for details.
1082 * Check if someone has an oplock on this file. If so we must
1083 * break it before continuing.
1085 if(share_entry->op_type & BATCH_OPLOCK)
1089 * It appears that the NT redirector may have a bug, in that
1090 * it tries to do an SMBmv on a file that it has open with a
1091 * batch oplock, and then fails to respond to the oplock break
1092 * request. This only seems to occur when the client is doing an
1093 * SMBmv to the smbd it is using - thus we try and detect this
1094 * condition by checking if the file being moved is open and oplocked by
1095 * this smbd process, and then not sending the oplock break in this
1096 * special case. If the file was open with a deny mode that
1097 * prevents the move the SMBmv will fail anyway with a share
1098 * violation error. JRA.
1100 if(rename_op && (share_entry->pid == pid))
1103 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1104 batch oplocked file %s, dev = %x, inode = %.0f\n", fname, (unsigned int)dev, (double)inode));
1107 * This next line is a test that allows the deny-mode
1108 * processing to be skipped. This seems to be needed as
1109 * NT insists on the rename succeeding (in Office 9x no less !).
1110 * This should be removed as soon as (a) MS fix the redirector
1111 * bug or (b) NT SMB support in Samba makes NT not issue the
1112 * call (as is my fervent hope). JRA.
1119 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1120 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1122 /* Oplock break.... */
1123 unlock_share_entry(conn, dev, inode, token);
1124 if(request_oplock_break(share_entry, dev, inode) == False)
1126 free((char *)old_shares);
1128 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1129 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1133 lock_share_entry(conn, dev, inode, &token);
1134 broke_oplock = True;
1139 /* someone else has a share lock on it, check to see
1141 if ((share_entry->share_mode != DENY_DOS) || (share_entry->pid != pid))
1148 free((char *)old_shares);
1149 num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
1151 } while(broke_oplock);
1154 /* XXXX exactly what share mode combinations should be allowed for
1155 deleting/renaming? */
1156 /* If we got here then either there were no share modes or
1157 all share modes were DENY_DOS and the pid == getpid() */
1162 unlock_share_entry(conn, dev, inode, token);
1163 if(old_shares != NULL)
1164 free((char *)old_shares);