2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1992-2007.
6 Copyright (C) Volker Lendecke 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 extern struct current_user current_user;
26 /****************************************************************************
27 Run a file if it is a magic script.
28 ****************************************************************************/
30 static void check_magic(struct files_struct *fsp)
33 const char *magic_output = NULL;
36 TALLOC_CTX *ctx = NULL;
38 struct connection_struct *conn = fsp->conn;
40 if (!*lp_magicscript(SNUM(conn))) {
44 DEBUG(5,("checking magic for %s\n",fsp->fsp_name));
46 if (!(p = strrchr_m(fsp->fsp_name,'/'))) {
52 if (!strequal(lp_magicscript(SNUM(conn)),p)) {
56 ctx = talloc_stackframe();
58 if (*lp_magicoutput(SNUM(conn))) {
59 magic_output = lp_magicoutput(SNUM(conn));
61 magic_output = talloc_asprintf(ctx,
70 chmod(fsp->fsp_name,0755);
71 ret = smbrun(fsp->fsp_name,&tmp_fd);
72 DEBUG(3,("Invoking magic command %s gave %d\n",
75 unlink(fsp->fsp_name);
76 if (ret != 0 || tmp_fd == -1) {
83 outfd = open(magic_output, O_CREAT|O_EXCL|O_RDWR, 0600);
90 if (sys_fstat(tmp_fd,&st) == -1) {
96 transfer_file(tmp_fd,outfd,(SMB_OFF_T)st.st_size);
102 /****************************************************************************
103 Common code to close a file or a directory.
104 ****************************************************************************/
106 static NTSTATUS close_filestruct(files_struct *fsp)
108 NTSTATUS status = NT_STATUS_OK;
109 connection_struct *conn = fsp->conn;
111 if (fsp->fh->fd != -1) {
112 if(flush_write_cache(fsp, CLOSE_FLUSH) == -1) {
113 status = map_nt_error_from_unix(errno);
115 delete_write_cache(fsp);
118 conn->num_files_open--;
122 /****************************************************************************
123 If any deferred opens are waiting on this close, notify them.
124 ****************************************************************************/
126 static void notify_deferred_opens(struct share_mode_lock *lck)
130 for (i=0; i<lck->num_share_modes; i++) {
131 struct share_mode_entry *e = &lck->share_modes[i];
133 if (!is_deferred_open_entry(e)) {
137 if (procid_is_me(&e->pid)) {
139 * We need to notify ourself to retry the open. Do
140 * this by finding the queued SMB record, moving it to
141 * the head of the queue and changing the wait time to
144 schedule_deferred_open_smb_message(e->op_mid);
146 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
148 share_mode_entry_to_message(msg, e);
150 messaging_send_buf(smbd_messaging_context(),
151 e->pid, MSG_SMB_OPEN_RETRY,
153 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
158 /****************************************************************************
159 Deal with removing a share mode on last close.
160 ****************************************************************************/
162 static NTSTATUS close_remove_share_mode(files_struct *fsp,
163 enum file_close_type close_type)
165 connection_struct *conn = fsp->conn;
166 bool delete_file = false;
167 bool changed_user = false;
168 struct share_mode_lock *lck;
169 SMB_STRUCT_STAT sbuf;
170 NTSTATUS status = NT_STATUS_OK;
175 * Lock the share entries, and determine if we should delete
176 * on close. If so delete whilst the lock is still in effect.
177 * This prevents race conditions with the file being created. JRA.
180 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL);
183 DEBUG(0, ("close_remove_share_mode: Could not get share mode "
184 "lock for file %s\n", fsp->fsp_name));
185 return NT_STATUS_INVALID_PARAMETER;
188 if (!del_share_mode(lck, fsp)) {
189 DEBUG(0, ("close_remove_share_mode: Could not delete share "
190 "entry for file %s\n", fsp->fsp_name));
193 if (fsp->initial_delete_on_close && (lck->delete_token == NULL)) {
194 bool became_user = False;
196 /* Initial delete on close was set and no one else
197 * wrote a real delete on close. */
199 if (current_user.vuid != fsp->vuid) {
200 become_user(conn, fsp->vuid);
203 set_delete_on_close_lck(lck, True, ¤t_user.ut);
209 delete_file = lck->delete_on_close;
213 /* See if others still have the file open. If this is the
214 * case, then don't delete. If all opens are POSIX delete now. */
215 for (i=0; i<lck->num_share_modes; i++) {
216 struct share_mode_entry *e = &lck->share_modes[i];
217 if (is_valid_share_mode_entry(e)) {
218 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
227 /* Notify any deferred opens waiting on this close. */
228 notify_deferred_opens(lck);
229 reply_to_oplock_break_requests(fsp);
232 * NT can set delete_on_close of the last open
233 * reference to a file.
236 if (!(close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE)
238 || (lck->delete_token == NULL)) {
244 * Ok, we have to delete the file
247 DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
248 "- deleting file.\n", fsp->fsp_name));
250 if (!unix_token_equal(lck->delete_token, ¤t_user.ut)) {
251 /* Become the user who requested the delete. */
253 DEBUG(5,("close_remove_share_mode: file %s. "
254 "Change user to uid %u\n",
256 (unsigned int)lck->delete_token->uid));
258 if (!push_sec_ctx()) {
259 smb_panic("close_remove_share_mode: file %s. failed to push "
263 set_sec_ctx(lck->delete_token->uid,
264 lck->delete_token->gid,
265 lck->delete_token->ngroups,
266 lck->delete_token->groups,
272 /* We can only delete the file if the name we have is still valid and
273 hasn't been renamed. */
275 if (fsp->posix_open) {
276 ret = SMB_VFS_LSTAT(conn,fsp->fsp_name,&sbuf);
278 ret = SMB_VFS_STAT(conn,fsp->fsp_name,&sbuf);
282 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
283 "was set and stat failed with error %s\n",
284 fsp->fsp_name, strerror(errno) ));
286 * Don't save the errno here, we ignore this error
291 id = vfs_file_id_from_sbuf(conn, &sbuf);
293 if (!file_id_equal(&fsp->file_id, &id)) {
294 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
295 "was set and dev and/or inode does not match\n",
297 DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
300 file_id_string_tos(&fsp->file_id),
301 file_id_string_tos(&id)));
303 * Don't save the errno here, we ignore this error
308 if (SMB_VFS_UNLINK(conn,fsp->fsp_name) != 0) {
310 * This call can potentially fail as another smbd may
311 * have had the file open with delete on close set and
312 * deleted it when its last reference to this file
313 * went away. Hence we log this but not at debug level
317 DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
318 "was set and unlink failed with error %s\n",
319 fsp->fsp_name, strerror(errno) ));
321 status = map_nt_error_from_unix(errno);
324 notify_fname(conn, NOTIFY_ACTION_REMOVED,
325 FILE_NOTIFY_CHANGE_FILE_NAME,
328 /* As we now have POSIX opens which can unlink
329 * with other open files we may have taken
330 * this code path with more than one share mode
331 * entry - ensure we only delete once by resetting
332 * the delete on close flag. JRA.
335 set_delete_on_close_lck(lck, False, NULL);
348 /****************************************************************************
351 close_type can be NORMAL_CLOSE=0,SHUTDOWN_CLOSE,ERROR_CLOSE.
352 printing and magic scripts are only run on normal close.
353 delete on close is done on normal and shutdown close.
354 ****************************************************************************/
356 static NTSTATUS close_normal_file(files_struct *fsp, enum file_close_type close_type)
358 NTSTATUS status = NT_STATUS_OK;
359 NTSTATUS saved_status1 = NT_STATUS_OK;
360 NTSTATUS saved_status2 = NT_STATUS_OK;
361 NTSTATUS saved_status3 = NT_STATUS_OK;
362 connection_struct *conn = fsp->conn;
364 if (fsp->aio_write_behind) {
366 * If we're finishing write behind on a close we can get a write
367 * error here, we must remember this.
369 int ret = wait_for_aio_completion(fsp);
371 saved_status1 = map_nt_error_from_unix(ret);
374 cancel_aio_by_fsp(fsp);
378 * If we're flushing on a close we can get a write
379 * error here, we must remember this.
382 saved_status2 = close_filestruct(fsp);
384 if (fsp->print_file) {
385 print_fsp_end(fsp, close_type);
390 /* If this is an old DOS or FCB open and we have multiple opens on
391 the same handle we only have one share mode. Ensure we only remove
392 the share mode on the last close. */
394 if (fsp->fh->ref_count == 1) {
395 /* Should we return on error here... ? */
396 saved_status3 = close_remove_share_mode(fsp, close_type);
399 if(fsp->oplock_type) {
400 release_file_oplock(fsp);
403 locking_close_file(smbd_messaging_context(), fsp);
405 status = fd_close(fsp);
407 /* check for magic scripts */
408 if (close_type == NORMAL_CLOSE) {
413 * Ensure pending modtime is set after close.
416 if (fsp->pending_modtime_owner && !null_timespec(fsp->pending_modtime)) {
417 set_filetime(conn, fsp->fsp_name, fsp->pending_modtime);
418 } else if (!null_timespec(fsp->last_write_time)) {
419 set_filetime(conn, fsp->fsp_name, fsp->last_write_time);
422 if (NT_STATUS_IS_OK(status)) {
423 if (!NT_STATUS_IS_OK(saved_status1)) {
424 status = saved_status1;
425 } else if (!NT_STATUS_IS_OK(saved_status2)) {
426 status = saved_status2;
427 } else if (!NT_STATUS_IS_OK(saved_status3)) {
428 status = saved_status3;
432 DEBUG(2,("%s closed file %s (numopen=%d) %s\n",
433 conn->user,fsp->fsp_name,
434 conn->num_files_open,
435 nt_errstr(status) ));
441 /****************************************************************************
442 Close a directory opened by an NT SMB call.
443 ****************************************************************************/
445 static NTSTATUS close_directory(files_struct *fsp, enum file_close_type close_type)
447 struct share_mode_lock *lck = 0;
448 bool delete_dir = False;
449 NTSTATUS status = NT_STATUS_OK;
452 * NT can set delete_on_close of the last open
453 * reference to a directory also.
456 lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL);
459 DEBUG(0, ("close_directory: Could not get share mode lock for %s\n", fsp->fsp_name));
460 return NT_STATUS_INVALID_PARAMETER;
463 if (!del_share_mode(lck, fsp)) {
464 DEBUG(0, ("close_directory: Could not delete share entry for %s\n", fsp->fsp_name));
467 if (fsp->initial_delete_on_close) {
468 bool became_user = False;
470 /* Initial delete on close was set - for
471 * directories we don't care if anyone else
472 * wrote a real delete on close. */
474 if (current_user.vuid != fsp->vuid) {
475 become_user(fsp->conn, fsp->vuid);
478 send_stat_cache_delete_message(fsp->fsp_name);
479 set_delete_on_close_lck(lck, True, ¤t_user.ut);
485 delete_dir = lck->delete_on_close;
489 /* See if others still have the dir open. If this is the
490 * case, then don't delete. If all opens are POSIX delete now. */
491 for (i=0; i<lck->num_share_modes; i++) {
492 struct share_mode_entry *e = &lck->share_modes[i];
493 if (is_valid_share_mode_entry(e)) {
494 if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
503 if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
507 /* Become the user who requested the delete. */
509 if (!push_sec_ctx()) {
510 smb_panic("close_directory: failed to push sec_ctx.\n");
513 set_sec_ctx(lck->delete_token->uid,
514 lck->delete_token->gid,
515 lck->delete_token->ngroups,
516 lck->delete_token->groups,
521 status = rmdir_internals(talloc_tos(),
522 fsp->conn, fsp->fsp_name);
524 DEBUG(5,("close_directory: %s. Delete on close was set - "
525 "deleting directory returned %s.\n",
526 fsp->fsp_name, nt_errstr(status)));
532 * Ensure we remove any change notify requests that would
533 * now fail as the directory has been deleted.
536 if(NT_STATUS_IS_OK(status)) {
537 remove_pending_change_notify_requests_by_fid(fsp, NT_STATUS_DELETE_PENDING);
541 remove_pending_change_notify_requests_by_fid(
546 * Do the code common to files and directories.
548 close_filestruct(fsp);
553 /****************************************************************************
554 Close a 'stat file' opened internally.
555 ****************************************************************************/
557 static NTSTATUS close_stat(files_struct *fsp)
560 * Do the code common to files and directories.
562 close_filestruct(fsp);
567 /****************************************************************************
568 Close a files_struct.
569 ****************************************************************************/
571 NTSTATUS close_file(files_struct *fsp, enum file_close_type close_type)
573 if(fsp->is_directory) {
574 return close_directory(fsp, close_type);
575 } else if (fsp->is_stat) {
576 return close_stat(fsp);
577 } else if (fsp->fake_file_handle != NULL) {
578 return close_fake_file(fsp);
580 return close_normal_file(fsp, close_type);