2 * Server-side directory object management
4 * Copyright (C) 2005 Vitaliy Margolen
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
23 #include "wine/port.h"
29 #include <sys/types.h>
32 #define WIN32_NO_STATUS
42 #define HASH_SIZE 7 /* default hash size */
46 struct object obj; /* object header */
47 struct namespace *entries; /* directory's name space */
50 static void directory_dump( struct object *obj, int verbose );
51 static struct object *directory_lookup_name( struct object *obj, struct unicode_str *name,
53 static void directory_destroy( struct object *obj );
55 static const struct object_ops directory_ops =
57 sizeof(struct directory), /* size */
58 directory_dump, /* dump */
59 no_add_queue, /* add_queue */
60 NULL, /* remove_queue */
63 no_signal, /* signal */
64 no_get_fd, /* get_fd */
65 default_fd_map_access, /* map_access */
66 default_get_sd, /* get_sd */
67 default_set_sd, /* set_sd */
68 directory_lookup_name, /* lookup_name */
69 no_open_file, /* open_file */
70 no_close_handle, /* close_handle */
71 directory_destroy /* destroy */
74 static struct directory *root_directory;
77 static void directory_dump( struct object *obj, int verbose )
79 assert( obj->ops == &directory_ops );
81 fputs( "Directory ", stderr );
82 dump_object_name( obj );
83 fputc( '\n', stderr );
86 static struct object *directory_lookup_name( struct object *obj, struct unicode_str *name,
89 struct directory *dir = (struct directory *)obj;
91 struct unicode_str tmp;
94 assert( obj->ops == &directory_ops );
96 if (!(p = memchrW( name->str, '\\', name->len / sizeof(WCHAR) )))
97 /* Last element in the path name */
100 tmp.len = (p - name->str) * sizeof(WCHAR);
103 if ((found = find_object( dir->entries, &tmp, attr )))
105 /* Skip trailing \\ */
109 tmp.len += sizeof(WCHAR);
111 /* Move to the next element*/
113 name->len -= tmp.len;
119 if (tmp.len == 0) /* Double backslash */
120 set_error( STATUS_OBJECT_NAME_INVALID );
121 else if (p) /* Path still has backslashes */
122 set_error( STATUS_OBJECT_PATH_NOT_FOUND );
127 static void directory_destroy( struct object *obj )
129 struct directory *dir = (struct directory *)obj;
130 assert( obj->ops == &directory_ops );
131 free( dir->entries );
134 static struct directory *create_directory( struct directory *root, const struct unicode_str *name,
135 unsigned int attr, unsigned int hash_size )
137 struct directory *dir;
139 if ((dir = create_named_object_dir( root, name, attr, &directory_ops )) &&
140 get_error() != STATUS_OBJECT_NAME_EXISTS)
142 if (!(dir->entries = create_namespace( hash_size )))
144 release_object( dir );
151 struct directory *get_directory_obj( struct process *process, obj_handle_t handle, unsigned int access )
153 return (struct directory *)get_handle_obj( process, handle, access, &directory_ops );
156 /******************************************************************************
157 * Find an object by its name in a given root object
160 * root [I] directory to start search from or NULL to start from \\
161 * name [I] object name to search for
162 * attr [I] OBJECT_ATTRIBUTES.Attributes
163 * name_left [O] [optional] leftover name if object is not found
166 * NULL: If params are invalid
167 * Found: If object with exact name is found returns that object
168 * (name_left->len == 0). Object's refcount is incremented
169 * Not found: The last matched parent. (name_left->len > 0)
170 * Parent's refcount is incremented.
172 struct object *find_object_dir( struct directory *root, const struct unicode_str *name,
173 unsigned int attr, struct unicode_str *name_left )
175 struct object *obj, *parent;
176 struct unicode_str name_tmp;
178 if (name) name_tmp = *name;
179 else name_tmp.len = 0;
182 * - Either rootdir or name have to be specified
183 * - If root is specified path shouldn't start with backslash */
186 if (name_tmp.len && name_tmp.str[0] == '\\')
188 set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
191 parent = grab_object( root );
195 if (!name_tmp.len || name_tmp.str[0] != '\\')
197 set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
200 parent = grab_object( &root_directory->obj );
201 /* skip leading backslash */
203 name_tmp.len -= sizeof(WCHAR);
206 /* Special case for opening RootDirectory */
207 if (!name_tmp.len) goto done;
209 while ((obj = parent->ops->lookup_name( parent, &name_tmp, attr )))
211 /* move to the next element */
212 release_object ( parent );
217 release_object( parent );
222 if (name_left) *name_left = name_tmp;
226 /* create a named (if name is present) or unnamed object. */
227 void *create_named_object_dir( struct directory *root, const struct unicode_str *name,
228 unsigned int attributes, const struct object_ops *ops )
230 struct object *obj, *new_obj = NULL;
231 struct unicode_str new_name;
233 if (!name || !name->len) return alloc_object( ops );
235 if (!(obj = find_object_dir( root, name, attributes, &new_name ))) return NULL;
238 if (attributes & OBJ_OPENIF && obj->ops == ops)
239 set_error( STATUS_OBJECT_NAME_EXISTS );
242 release_object( obj );
244 if (attributes & OBJ_OPENIF)
245 set_error( STATUS_OBJECT_TYPE_MISMATCH );
247 set_error( STATUS_OBJECT_NAME_COLLISION );
252 /* ATM we can't insert objects into anything else but directories */
253 if (obj->ops != &directory_ops)
254 set_error( STATUS_OBJECT_TYPE_MISMATCH );
257 struct directory *dir = (struct directory *)obj;
258 if ((new_obj = create_object( dir->entries, ops, &new_name, &dir->obj )))
262 release_object( obj );
266 /* open a new handle to an existing object */
267 void *open_object_dir( struct directory *root, const struct unicode_str *name,
268 unsigned int attr, const struct object_ops *ops )
270 struct unicode_str name_left;
273 if ((obj = find_object_dir( root, name, attr, &name_left )))
275 if (name_left.len) /* not fully parsed */
276 set_error( STATUS_OBJECT_NAME_NOT_FOUND );
277 else if (ops && obj->ops != ops)
278 set_error( STATUS_OBJECT_TYPE_MISMATCH );
282 release_object( obj );
288 /* Global initialization */
290 void init_directories(void)
293 static const WCHAR dir_globalW[] = {'\\','?','?'};
294 static const WCHAR dir_driverW[] = {'D','r','i','v','e','r'};
295 static const WCHAR dir_deviceW[] = {'D','e','v','i','c','e'};
296 static const WCHAR dir_basenamedW[] = {'\\','B','a','s','e','N','a','m','e','d','O','b','j','e','c','t','s'};
297 static const WCHAR dir_named_pipeW[] = {'\\','D','e','v','i','c','e','\\','N','a','m','e','d','P','i','p','e'};
298 static const WCHAR dir_mailslotW[] = {'\\','D','e','v','i','c','e','\\','M','a','i','l','S','l','o','t'};
299 static const struct unicode_str dir_global_str = {dir_globalW, sizeof(dir_globalW)};
300 static const struct unicode_str dir_driver_str = {dir_driverW, sizeof(dir_driverW)};
301 static const struct unicode_str dir_device_str = {dir_deviceW, sizeof(dir_deviceW)};
302 static const struct unicode_str dir_basenamed_str = {dir_basenamedW, sizeof(dir_basenamedW)};
303 static const struct unicode_str dir_named_pipe_str = {dir_named_pipeW, sizeof(dir_named_pipeW)};
304 static const struct unicode_str dir_mailslot_str = {dir_mailslotW, sizeof(dir_mailslotW)};
307 static const WCHAR link_dosdevW[] = {'D','o','s','D','e','v','i','c','e','s'};
308 static const WCHAR link_globalW[] = {'G','l','o','b','a','l'};
309 static const WCHAR link_localW[] = {'L','o','c','a','l'};
310 static const WCHAR link_pipeW[] = {'P','I','P','E'};
311 static const WCHAR link_mailslotW[] = {'M','A','I','L','S','L','O','T'};
312 static const struct unicode_str link_dosdev_str = {link_dosdevW, sizeof(link_dosdevW)};
313 static const struct unicode_str link_global_str = {link_globalW, sizeof(link_globalW)};
314 static const struct unicode_str link_local_str = {link_localW, sizeof(link_localW)};
315 static const struct unicode_str link_pipe_str = {link_pipeW, sizeof(link_pipeW)};
316 static const struct unicode_str link_mailslot_str = {link_mailslotW, sizeof(link_mailslotW)};
319 static const WCHAR named_pipeW[] = {'N','a','m','e','d','P','i','p','e'};
320 static const WCHAR mailslotW[] = {'M','a','i','l','S','l','o','t'};
321 static const struct unicode_str named_pipe_str = {named_pipeW, sizeof(named_pipeW)};
322 static const struct unicode_str mailslot_str = {mailslotW, sizeof(mailslotW)};
324 struct directory *dir_driver, *dir_device, *dir_global, *dir_basenamed;
325 struct symlink *link_dosdev, *link_global1, *link_global2, *link_local, *link_pipe, *link_mailslot;
327 root_directory = create_directory( NULL, NULL, 0, HASH_SIZE );
328 dir_driver = create_directory( root_directory, &dir_driver_str, 0, HASH_SIZE );
329 dir_device = create_directory( root_directory, &dir_device_str, 0, HASH_SIZE );
330 make_object_static( &root_directory->obj );
331 make_object_static( &dir_driver->obj );
333 dir_global = create_directory( NULL, &dir_global_str, 0, HASH_SIZE );
334 /* use a larger hash table for this one since it can contain a lot of objects */
335 dir_basenamed = create_directory( NULL, &dir_basenamed_str, 0, 37 );
338 create_named_pipe_device( dir_device, &named_pipe_str );
339 create_mailslot_device( dir_device, &mailslot_str );
342 link_dosdev = create_symlink( root_directory, &link_dosdev_str, 0, &dir_global_str );
343 link_global1 = create_symlink( dir_global, &link_global_str, 0, &dir_global_str );
344 link_global2 = create_symlink( dir_basenamed, &link_global_str, 0, &dir_basenamed_str );
345 link_local = create_symlink( dir_basenamed, &link_local_str, 0, &dir_basenamed_str );
346 link_pipe = create_symlink( dir_global, &link_pipe_str, 0, &dir_named_pipe_str );
347 link_mailslot = create_symlink( dir_global, &link_mailslot_str, 0, &dir_mailslot_str );
348 make_object_static( (struct object *)link_dosdev );
349 make_object_static( (struct object *)link_global1 );
350 make_object_static( (struct object *)link_global2 );
351 make_object_static( (struct object *)link_local );
352 make_object_static( (struct object *)link_pipe );
353 make_object_static( (struct object *)link_mailslot );
355 /* the symlinks or devices hold references so we can release these */
356 release_object( dir_global );
357 release_object( dir_device );
358 release_object( dir_basenamed );
361 /* create a directory object */
362 DECL_HANDLER(create_directory)
364 struct unicode_str name;
365 struct directory *dir, *root = NULL;
368 get_req_unicode_str( &name );
369 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
372 if ((dir = create_directory( root, &name, req->attributes, HASH_SIZE )))
374 reply->handle = alloc_handle( current->process, dir, req->access, req->attributes );
375 release_object( dir );
378 if (root) release_object( root );
381 /* open a directory object */
382 DECL_HANDLER(open_directory)
384 struct unicode_str name;
385 struct directory *dir, *root = NULL;
387 get_req_unicode_str( &name );
388 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
391 if ((dir = open_object_dir( root, &name, req->attributes, &directory_ops )))
393 reply->handle = alloc_handle( current->process, &dir->obj, req->access, req->attributes );
394 release_object( dir );
397 if (root) release_object( root );