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 int fd_attempt_close(file_fd_struct *fd_ptr)
150 extern struct current_user current_user;
152 #ifdef LARGE_SMB_INO_T
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,
157 #else /* LARGE_SMB_INO_T */
158 DEBUG(3,("fd_attempt_close fd = %d, dev = %x, inode = %lx, open_flags = %d, ref_count = %d.\n",
159 fd_ptr->fd, (unsigned int)fd_ptr->dev, (unsigned long)fd_ptr->inode,
160 fd_ptr->real_open_flags,
162 #endif /* LARGE_SMB_INO_T */
164 if(fd_ptr->ref_count > 0) {
166 if(fd_ptr->ref_count == 0) {
169 if(fd_ptr->fd_readonly != -1)
170 close(fd_ptr->fd_readonly);
171 if(fd_ptr->fd_writeonly != -1)
172 close(fd_ptr->fd_writeonly);
174 * Delete this fd_ptr.
178 fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid);
181 return fd_ptr->ref_count;
184 /****************************************************************************
185 fd support routines - check that current user has permissions
186 to open this file. Used when uid not found in optimization cache.
187 This is really ugly code, as due to POSIX locking braindamage we must
188 fork and then attempt to open the file, and return success or failure
190 ****************************************************************************/
191 static BOOL check_access_allowed_for_current_user( char *fname, int accmode )
195 if((child_pid = fork()) < 0) {
196 DEBUG(0,("check_access_allowed_for_current_user: fork failed.\n"));
206 if ((wpid = sys_waitpid(child_pid, &status_code, 0)) < 0) {
207 DEBUG(0,("check_access_allowed_for_current_user: The process is no longer waiting!\n"));
211 if (child_pid != wpid) {
212 DEBUG(0,("check_access_allowed_for_current_user: We were waiting for the wrong process ID\n"));
215 #if defined(WIFEXITED) && defined(WEXITSTATUS)
216 if (WIFEXITED(status_code) == 0) {
217 DEBUG(0,("check_access_allowed_for_current_user: The process exited while we were waiting\n"));
220 if (WEXITSTATUS(status_code) != 0) {
221 DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access denied.\n", status_code));
224 #else /* defined(WIFEXITED) && defined(WEXITSTATUS) */
225 if(status_code != 0) {
226 DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access denied.\n", status_code));
229 #endif /* defined(WIFEXITED) && defined(WEXITSTATUS) */
232 * Success - the child could open the file.
234 DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access allowed.\n", status_code));
241 DEBUG(9,("check_access_allowed_for_current_user: Child - attempting to open %s with mode %d.\n", fname, accmode ));
242 if((fd = fd_attempt_open( fname, accmode, 0)) < 0) {
247 DEBUG(9,("check_access_allowed_for_current_user: Child - returning ok.\n"));
254 /****************************************************************************
255 check a filename for the pipe string
256 ****************************************************************************/
257 static void check_for_pipe(char *fname)
259 /* special case of pipe opens */
263 if (strstr(s,"pipe/")) {
264 DEBUG(3,("Rejecting named pipe open for %s\n",fname));
265 unix_ERR_class = ERRSRV;
266 unix_ERR_code = ERRaccess;
270 /****************************************************************************
272 ****************************************************************************/
273 static void open_file(files_struct *fsp,connection_struct *conn,
274 char *fname1,int flags,int mode, SMB_STRUCT_STAT *sbuf)
276 extern struct current_user current_user;
278 SMB_STRUCT_STAT statbuf;
279 file_fd_struct *fd_ptr;
280 int accmode = (flags & (O_RDONLY | O_WRONLY | O_RDWR));
284 fsp->granted_oplock = False;
287 pstrcpy(fname,fname1);
289 /* check permissions */
292 * This code was changed after seeing a client open request
293 * containing the open mode of (DENY_WRITE/read-only) with
294 * the 'create if not exist' bit set. The previous code
295 * would fail to open the file read only on a read-only share
296 * as it was checking the flags parameter directly against O_RDONLY,
297 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
301 if (conn->read_only && !conn->printer) {
302 /* It's a read-only share - fail if we wanted to write. */
303 if(accmode != O_RDONLY) {
304 DEBUG(3,("Permission denied opening %s\n",fname));
305 check_for_pipe(fname);
307 } else if(flags & O_CREAT) {
308 /* We don't want to write - but we must make sure that O_CREAT
309 doesn't create the file if we have write access into the
316 /* this handles a bug in Win95 - it doesn't say to create the file when it
323 if (flags == O_WRONLY)
324 DEBUG(3,("Bug in client? Set O_WRONLY without O_CREAT\n"));
328 * Ensure we have a valid struct stat so we can search the
332 if(dos_stat(fname, &statbuf) < 0) {
333 if(errno != ENOENT) {
334 DEBUG(3,("Error doing stat on file %s (%s)\n",
335 fname,strerror(errno)));
337 check_for_pipe(fname);
347 * Check to see if we have this file already
348 * open. If we do, just use the already open fd and increment the
349 * reference count (fd_get_already_open increments the ref_count).
351 if((fd_ptr = fd_get_already_open(sbuf))!= 0) {
353 * File was already open.
357 * Check it wasn't open for exclusive use.
359 if((flags & O_CREAT) && (flags & O_EXCL)) {
366 * Ensure that the user attempting to open
367 * this file has permissions to do so, if
368 * the user who originally opened the file wasn't
369 * the same as the current user.
372 if(!fd_is_in_uid_cache(fd_ptr, (uid_t)current_user.uid)) {
373 if(!check_access_allowed_for_current_user( fname, accmode )) {
374 /* Error - permission denied. */
375 DEBUG(3,("Permission denied opening file %s (flags=%d, accmode = %d)\n",
376 fname, flags, accmode));
377 /* Ensure the ref_count is decremented. */
379 fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid);
385 fd_add_to_uid_cache(fd_ptr, (uid_t)current_user.uid);
388 * If not opened O_RDWR try
389 * and do that here - a chmod may have been done
390 * between the last open and now.
392 if(fd_ptr->real_open_flags != O_RDWR)
393 fd_attempt_reopen(fname, mode, fd_ptr);
396 * Ensure that if we wanted write access
397 * it has been opened for write, and if we wanted read it
400 if(((accmode == O_WRONLY) && (fd_ptr->real_open_flags == O_RDONLY)) ||
401 ((accmode == O_RDONLY) && (fd_ptr->real_open_flags == O_WRONLY)) ||
402 ((accmode == O_RDWR) && (fd_ptr->real_open_flags != O_RDWR))) {
403 DEBUG(3,("Error opening (already open for flags=%d) file %s (%s) (flags=%d)\n",
404 fd_ptr->real_open_flags, fname,strerror(EACCES),flags));
405 check_for_pipe(fname);
406 fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid);
413 /* We need to allocate a new file_fd_struct (this increments the
415 if((fd_ptr = fd_get_new()) == 0)
418 * Whatever the requested flags, attempt read/write access,
419 * as we don't know what flags future file opens may require.
420 * If this fails, try again with the required flags.
421 * Even if we open read/write when only read access was
422 * requested the setting of the can_write flag in
423 * the file_struct will protect us from errant
424 * write requests. We never need to worry about O_APPEND
425 * as this is not set anywhere in Samba.
427 fd_ptr->real_open_flags = O_RDWR;
428 /* Set the flags as needed without the read/write modes. */
429 open_flags = flags & ~(O_RDWR|O_WRONLY|O_RDONLY);
430 fd_ptr->fd = fd_attempt_open(fname, open_flags|O_RDWR, mode);
432 * On some systems opening a file for R/W access on a read only
433 * filesystems sets errno to EROFS.
436 if((fd_ptr->fd == -1) && ((errno == EACCES) || (errno == EROFS))) {
438 if((fd_ptr->fd == -1) && (errno == EACCES)) {
440 if(accmode != O_RDWR) {
441 fd_ptr->fd = fd_attempt_open(fname, open_flags|accmode, mode);
442 fd_ptr->real_open_flags = accmode;
447 if ((fd_ptr->fd >=0) &&
448 conn->printer && lp_minprintspace(SNUM(conn))) {
452 pstrcpy(dname,fname);
453 p = strrchr(dname,'/');
455 if (sys_disk_free(dname,&dum1,&dum2,&dum3) <
456 lp_minprintspace(SNUM(conn))) {
457 if(fd_attempt_close(fd_ptr) == 0)
467 DEBUG(3,("Error opening file %s (%s) (flags=%d)\n",
468 fname,strerror(errno),flags));
469 /* Ensure the ref_count is decremented. */
470 fd_attempt_close(fd_ptr);
471 check_for_pipe(fname);
479 if(sys_fstat(fd_ptr->fd, &statbuf) == -1) {
480 /* Error - backout !! */
481 DEBUG(3,("Error doing fstat on fd %d, file %s (%s)\n",
482 fd_ptr->fd, fname,strerror(errno)));
483 /* Ensure the ref_count is decremented. */
484 fd_attempt_close(fd_ptr);
490 /* Set the correct entries in fd_ptr. */
491 fd_ptr->dev = sbuf->st_dev;
492 fd_ptr->inode = sbuf->st_ino;
494 fsp->fd_ptr = fd_ptr;
495 conn->num_files_open++;
496 fsp->mode = sbuf->st_mode;
497 GetTimeOfDay(&fsp->open_time);
498 fsp->vuid = current_user.vuid;
502 fsp->mmap_ptr = NULL;
504 fsp->can_lock = True;
505 fsp->can_read = ((flags & O_WRONLY)==0);
506 fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
508 fsp->print_file = conn->printer;
509 fsp->modified = False;
510 fsp->granted_oplock = False;
511 fsp->sent_oplock_break = False;
512 fsp->is_directory = False;
515 * Note that the file name here is the *untranslated* name
516 * ie. it is still in the DOS codepage sent from the client.
517 * All use of this filename will pass though the sys_xxxx
518 * functions which will do the dos_to_unix translation before
519 * mapping into a UNIX filename. JRA.
521 string_set(&fsp->fsp_name,fname);
522 fsp->wbmpx_ptr = NULL;
525 * If the printer is marked as postscript output a leading
526 * file identifier to ensure the file is treated as a raw
528 * This has a similar effect as CtrlD=0 in WIN.INI file.
529 * tim@fsg.com 09/06/94
531 if (fsp->print_file && lp_postscript(SNUM(conn)) && fsp->can_write) {
532 DEBUG(3,("Writing postscript line\n"));
533 write_file(fsp,"%!\n",3);
536 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
537 *sesssetup_user ? sesssetup_user : conn->user,fsp->fsp_name,
538 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
539 conn->num_files_open));
544 /* mmap it if read-only */
545 if (!fsp->can_write) {
546 fsp->mmap_size = file_size(fname);
547 fsp->mmap_ptr = (char *)mmap(NULL,fsp->mmap_size,
548 PROT_READ,MAP_SHARED,fsp->fd_ptr->fd,0);
550 if (fsp->mmap_ptr == (char *)-1 || !fsp->mmap_ptr) {
551 DEBUG(3,("Failed to mmap() %s - %s\n",
552 fname,strerror(errno)));
553 fsp->mmap_ptr = NULL;
560 /****************************************************************************
562 Helper for open_file_shared.
563 Truncate a file after checking locking; close file if locked.
564 **************************************************************************/
565 static void truncate_unless_locked(files_struct *fsp, connection_struct *conn, int token,
569 #ifdef LARGE_SMB_OFF_T
570 if (is_locked(fsp,conn,0x3FFFFFFFFFFFFFFFLL,0,F_WRLCK)){
572 if (is_locked(fsp,conn,0x3FFFFFFF,0,F_WRLCK)){
574 /* If share modes are in force for this connection we
575 have the share entry locked. Unlock it before closing. */
576 if (*share_locked && lp_share_modes(SNUM(conn)))
577 unlock_share_entry( conn, fsp->fd_ptr->dev,
578 fsp->fd_ptr->inode, token);
579 close_file(fsp,False);
580 /* Share mode no longer locked. */
581 *share_locked = False;
583 unix_ERR_class = ERRDOS;
584 unix_ERR_code = ERRlock;
587 sys_ftruncate(fsp->fd_ptr->fd,0);
593 /****************************************************************************
594 open a file with a share mode
595 ****************************************************************************/
596 void open_file_shared(files_struct *fsp,connection_struct *conn,char *fname,int share_mode,int ofun,
597 int mode,int oplock_request, int *Access,int *action)
601 int deny_mode = (share_mode>>4)&7;
602 SMB_STRUCT_STAT sbuf;
603 BOOL file_existed = file_exist(fname,&sbuf);
604 BOOL share_locked = False;
605 BOOL fcbopen = False;
609 int num_share_modes = 0;
614 /* this is for OS/2 EAs - try and say we don't support them */
615 if (strstr(fname,".+,;=[]."))
617 unix_ERR_class = ERRDOS;
618 /* OS/2 Workplace shell fix may be main code stream in a later release. */
619 #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
620 unix_ERR_code = ERRcannotopen;
621 #else /* OS2_WPS_FIX */
622 unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
623 #endif /* OS2_WPS_FIX */
628 if ((ofun & 0x3) == 0 && file_existed)
636 if ((ofun & 0x3) == 2)
639 /* note that we ignore the append flag as
640 append does not mean the same thing under dos and unix */
642 switch (share_mode&0xF)
660 if (share_mode&(1<<14)) {
665 if (flags != O_RDONLY && file_existed &&
666 (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,&sbuf))))
676 if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB)
678 DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
683 if (deny_mode == DENY_FCB) deny_mode = DENY_DOS;
685 if (lp_share_modes(SNUM(conn)))
688 share_mode_entry *old_shares = 0;
694 lock_share_entry(conn, dev, inode, &token);
696 num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
700 * Check if the share modes will give us access.
703 if(share_locked && (num_share_modes != 0))
710 broke_oplock = False;
711 for(i = 0; i < num_share_modes; i++)
713 share_mode_entry *share_entry = &old_shares[i];
716 * By observation of NetBench, oplocks are broken *before* share
717 * modes are checked. This allows a file to be closed by the client
718 * if the share mode would deny access and the client has an oplock.
719 * Check if someone has an oplock on this file. If so we must break
720 * it before continuing.
722 if(share_entry->op_type & (EXCLUSIVE_OPLOCK|BATCH_OPLOCK))
725 #ifdef LARGE_SMB_INO_T
726 DEBUG(5,("open_file_shared: breaking oplock (%x) on file %s, \
727 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
728 #else /* LARGE_SMB_INO_T */
729 DEBUG(5,("open_file_shared: breaking oplock (%x) on file %s, \
730 dev = %x, inode = %lx\n", share_entry->op_type, fname, (unsigned int)dev, (unsigned long)inode));
731 #endif /* LARGE_SMB_INO_T */
733 /* Oplock break.... */
734 unlock_share_entry(conn, dev, inode, token);
735 if(request_oplock_break(share_entry, dev, inode) == False)
737 free((char *)old_shares);
739 #ifdef LARGE_SMB_INO_T
740 DEBUG(0,("open_file_shared: FAILED when breaking oplock (%x) on file %s, \
741 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
742 #else /* LARGE_SMB_INO_T */
743 DEBUG(0,("open_file_shared: FAILED when breaking oplock (%x) on file %s, \
744 dev = %x, inode = %lx\n", old_shares[i].op_type, fname, (unsigned int)dev, (unsigned long)inode));
745 #endif /* LARGE_SMB_INO_T */
748 unix_ERR_class = ERRDOS;
749 unix_ERR_code = ERRbadshare;
752 lock_share_entry(conn, dev, inode, &token);
757 /* someone else has a share lock on it, check to see
759 if(check_share_mode(share_entry, deny_mode, fname, fcbopen, &flags) == False)
761 free((char *)old_shares);
762 unlock_share_entry(conn, dev, inode, token);
764 unix_ERR_class = ERRDOS;
765 unix_ERR_code = ERRbadshare;
773 free((char *)old_shares);
774 num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
776 } while(broke_oplock);
780 free((char *)old_shares);
783 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
786 open_file(fsp,conn,fname,flags|(flags2&~(O_TRUNC)),mode,file_existed ? &sbuf : 0);
787 if (!fsp->open && flags==O_RDWR && errno!=ENOENT && fcbopen)
790 open_file(fsp,conn,fname,flags,mode,file_existed ? &sbuf : 0 );
797 if((share_locked == False) && lp_share_modes(SNUM(conn)))
799 /* We created the file - thus we must now lock the share entry before creating it. */
800 dev = fsp->fd_ptr->dev;
801 inode = fsp->fd_ptr->inode;
802 lock_share_entry(conn, dev, inode, &token);
819 fsp->share_mode = (deny_mode<<4) | open_mode;
822 (*Access) = open_mode;
826 if (file_existed && !(flags2 & O_TRUNC)) *action = FILE_WAS_OPENED;
827 if (!file_existed) *action = FILE_WAS_CREATED;
828 if (file_existed && (flags2 & O_TRUNC)) *action = FILE_WAS_OVERWRITTEN;
830 /* We must create the share mode entry before truncate as
831 truncate can fail due to locking and have to close the
832 file (which expects the share_mode_entry to be there).
834 if (lp_share_modes(SNUM(conn)))
837 /* JRA. Currently this only services Exlcusive and batch
838 oplocks (no other opens on this file). This needs to
839 be extended to level II oplocks (multiple reader
842 if(oplock_request && (num_share_modes == 0) && lp_oplocks(SNUM(conn)) &&
843 !IS_VETO_OPLOCK_PATH(conn,fname))
845 fsp->granted_oplock = True;
846 fsp->sent_oplock_break = False;
847 global_oplocks_open++;
850 #ifdef LARGE_SMB_INO_T
851 DEBUG(5,("open_file_shared: granted oplock (%x) on file %s, \
852 dev = %x, inode = %.0f\n", oplock_request, fname, (unsigned int)dev, (double)inode));
853 #else /* LARGE_SMB_INO_T */
854 DEBUG(5,("open_file_shared: granted oplock (%x) on file %s, \
855 dev = %x, inode = %lx\n", oplock_request, fname, (unsigned int)dev, (double)inode));
856 #endif /* LARGE_SMB_INO_T */
864 set_share_mode(token, fsp, port, oplock_request);
867 if ((flags2&O_TRUNC) && file_existed)
868 truncate_unless_locked(fsp,conn,token,&share_locked);
871 if (share_locked && lp_share_modes(SNUM(conn)))
872 unlock_share_entry( conn, dev, inode, token);
877 /****************************************************************************
878 Open a directory from an NT SMB call.
879 ****************************************************************************/
880 int open_directory(files_struct *fsp,connection_struct *conn,
881 char *fname, int smb_ofun, int unixmode, int *action)
883 extern struct current_user current_user;
886 if (smb_ofun & 0x10) {
888 * Create the directory.
891 if(dos_mkdir(fname, unixmode) < 0) {
892 DEBUG(0,("open_directory: unable to create %s. Error was %s\n",
893 fname, strerror(errno) ));
897 *action = FILE_WAS_CREATED;
900 * Check that it *was* a directory.
903 if(dos_stat(fname, &st) < 0) {
904 DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n",
905 fname, strerror(errno) ));
909 if(!S_ISDIR(st.st_mode)) {
910 DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
913 *action = FILE_WAS_OPENED;
916 DEBUG(5,("open_directory: opening directory %s\n",
920 * Setup the files_struct for it.
924 conn->num_files_open++;
926 GetTimeOfDay(&fsp->open_time);
927 fsp->vuid = current_user.vuid;
931 fsp->mmap_ptr = NULL;
933 fsp->can_lock = True;
934 fsp->can_read = False;
935 fsp->can_write = False;
937 fsp->print_file = False;
938 fsp->modified = False;
939 fsp->granted_oplock = False;
940 fsp->sent_oplock_break = False;
941 fsp->is_directory = True;
944 * Note that the file name here is the *untranslated* name
945 * ie. it is still in the DOS codepage sent from the client.
946 * All use of this filename will pass though the sys_xxxx
947 * functions which will do the dos_to_unix translation before
948 * mapping into a UNIX filename. JRA.
950 string_set(&fsp->fsp_name,fname);
951 fsp->wbmpx_ptr = NULL;
956 enum {AFAIL,AREAD,AWRITE,AALL};
958 /*******************************************************************
959 reproduce the share mode access table
960 ********************************************************************/
961 static int access_table(int new_deny,int old_deny,int old_mode,
962 int share_pid,char *fname)
964 if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
966 if (new_deny == DENY_DOS || old_deny == DENY_DOS) {
968 if (old_deny == new_deny && share_pid == pid)
971 if (old_mode == 0) return(AREAD);
973 /* the new smbpub.zip spec says that if the file extension is
974 .com, .dll, .exe or .sym then allow the open. I will force
975 it to read-only as this seems sensible although the spec is
976 a little unclear on this. */
977 if ((fname = strrchr(fname,'.'))) {
978 if (strequal(fname,".com") ||
979 strequal(fname,".dll") ||
980 strequal(fname,".exe") ||
981 strequal(fname,".sym"))
991 if (old_deny==DENY_WRITE && old_mode==0) return(AREAD);
992 if (old_deny==DENY_READ && old_mode==0) return(AWRITE);
993 if (old_deny==DENY_NONE && old_mode==0) return(AALL);
996 if (old_deny==DENY_WRITE && old_mode==1) return(AREAD);
997 if (old_deny==DENY_READ && old_mode==1) return(AWRITE);
998 if (old_deny==DENY_NONE && old_mode==1) return(AALL);
1001 if (old_deny==DENY_WRITE) return(AREAD);
1002 if (old_deny==DENY_READ) return(AWRITE);
1003 if (old_deny==DENY_NONE) return(AALL);
1009 /*******************************************************************
1010 check if the share mode on a file allows it to be deleted or unlinked
1011 return True if sharing doesn't prevent the operation
1012 ********************************************************************/
1013 BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op)
1017 share_mode_entry *old_shares = 0;
1018 int num_share_modes;
1019 SMB_STRUCT_STAT sbuf;
1025 if(!lp_share_modes(SNUM(conn)))
1028 if (dos_stat(fname,&sbuf) == -1) return(True);
1031 inode = sbuf.st_ino;
1033 lock_share_entry(conn, dev, inode, &token);
1034 num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
1037 * Check if the share modes will give us access.
1040 if(num_share_modes != 0)
1047 broke_oplock = False;
1048 for(i = 0; i < num_share_modes; i++)
1050 share_mode_entry *share_entry = &old_shares[i];
1053 * Break oplocks before checking share modes. See comment in
1054 * open_file_shared for details.
1055 * Check if someone has an oplock on this file. If so we must
1056 * break it before continuing.
1058 if(share_entry->op_type & BATCH_OPLOCK)
1062 * It appears that the NT redirector may have a bug, in that
1063 * it tries to do an SMBmv on a file that it has open with a
1064 * batch oplock, and then fails to respond to the oplock break
1065 * request. This only seems to occur when the client is doing an
1066 * SMBmv to the smbd it is using - thus we try and detect this
1067 * condition by checking if the file being moved is open and oplocked by
1068 * this smbd process, and then not sending the oplock break in this
1069 * special case. If the file was open with a deny mode that
1070 * prevents the move the SMBmv will fail anyway with a share
1071 * violation error. JRA.
1073 if(rename_op && (share_entry->pid == pid))
1076 #ifdef LARGE_SMB_INO_T
1077 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1078 batch oplocked file %s, dev = %x, inode = %.0f\n", fname, (unsigned int)dev, (double)inode));
1079 #else /* LARGE_SMB_INO_T */
1080 DEBUG(0,("check_file_sharing: NT redirector workaround - rename attempted on \
1081 batch oplocked file %s, dev = %x, inode = %lx\n", fname, (unsigned int)dev, (unsigned long)inode));
1082 #endif /* LARGE_SMB_INO_T */
1085 * This next line is a test that allows the deny-mode
1086 * processing to be skipped. This seems to be needed as
1087 * NT insists on the rename succeeding (in Office 9x no less !).
1088 * This should be removed as soon as (a) MS fix the redirector
1089 * bug or (b) NT SMB support in Samba makes NT not issue the
1090 * call (as is my fervent hope). JRA.
1097 #ifdef LARGE_SMB_INO_T
1098 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1099 dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode));
1100 #else /* LARGE_SMB_INO_T */
1101 DEBUG(5,("check_file_sharing: breaking oplock (%x) on file %s, \
1102 dev = %x, inode = %lx\n", share_entry->op_type, fname, (unsigned int)dev, (unsigned long)inode));
1103 #endif /* LARGE_SMB_INO_T */
1105 /* Oplock break.... */
1106 unlock_share_entry(conn, dev, inode, token);
1107 if(request_oplock_break(share_entry, dev, inode) == False)
1109 free((char *)old_shares);
1111 #ifdef LARGE_SMB_INO_T
1112 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1113 dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
1114 #else /* LARGE_SMB_INO_T */
1115 DEBUG(0,("check_file_sharing: FAILED when breaking oplock (%x) on file %s, \
1116 dev = %x, inode = %lx\n", old_shares[i].op_type, fname, (unsigned int)dev, (unsigned long)inode));
1117 #endif /* LARGE_SMB_INO_T */
1121 lock_share_entry(conn, dev, inode, &token);
1122 broke_oplock = True;
1127 /* someone else has a share lock on it, check to see
1129 if ((share_entry->share_mode != DENY_DOS) || (share_entry->pid != pid))
1136 free((char *)old_shares);
1137 num_share_modes = get_share_modes(conn, token, dev, inode, &old_shares);
1139 } while(broke_oplock);
1142 /* XXXX exactly what share mode combinations should be allowed for
1143 deleting/renaming? */
1144 /* If we got here then either there were no share modes or
1145 all share modes were DENY_DOS and the pid == getpid() */
1150 unlock_share_entry(conn, dev, inode, token);
1151 if(old_shares != NULL)
1152 free((char *)old_shares);
1156 /****************************************************************************
1157 check if we can open a file with a share mode
1158 ****************************************************************************/
1159 int check_share_mode( share_mode_entry *share, int deny_mode, char *fname,
1160 BOOL fcbopen, int *flags)
1162 int old_open_mode = share->share_mode &0xF;
1163 int old_deny_mode = (share->share_mode >>4)&7;
1165 if (old_deny_mode > 4 || old_open_mode > 2)
1167 DEBUG(0,("Invalid share mode found (%d,%d,%d) on file %s\n",
1168 deny_mode,old_deny_mode,old_open_mode,fname));
1173 int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
1176 if ((access_allowed == AFAIL) ||
1177 (!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
1178 (access_allowed == AREAD && *flags == O_WRONLY) ||
1179 (access_allowed == AWRITE && *flags == O_RDONLY))
1181 DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
1182 deny_mode,old_deny_mode,old_open_mode,
1183 share->pid,fname, fcbopen, *flags, access_allowed));
1187 if (access_allowed == AREAD)
1190 if (access_allowed == AWRITE)