2 * Server-side symbolic link 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
43 struct object obj; /* object header */
44 WCHAR *target; /* target of the symlink */
45 data_size_t len; /* target len in bytes */
48 static void symlink_dump( struct object *obj, int verbose );
49 static unsigned int symlink_map_access( struct object *obj, unsigned int access );
50 static struct object *symlink_lookup_name( struct object *obj, struct unicode_str *name,
52 static void symlink_destroy( struct object *obj );
54 static const struct object_ops symlink_ops =
56 sizeof(struct symlink), /* size */
57 symlink_dump, /* dump */
58 no_add_queue, /* add_queue */
59 NULL, /* remove_queue */
62 no_signal, /* signal */
63 no_get_fd, /* get_fd */
64 symlink_map_access, /* map_access */
65 symlink_lookup_name, /* lookup_name */
66 no_open_file, /* open_file */
67 no_close_handle, /* close_handle */
68 symlink_destroy /* destroy */
71 static void symlink_dump( struct object *obj, int verbose )
73 struct symlink *symlink = (struct symlink *)obj;
74 assert( obj->ops == &symlink_ops );
76 fprintf( stderr, "Symlink " );
77 dump_object_name( obj );
78 fprintf( stderr, " -> L\"" );
79 dump_strW( symlink->target, symlink->len / sizeof(WCHAR), stderr, "\"\"" );
80 fprintf( stderr, "\"\n" );
83 static struct object *symlink_lookup_name( struct object *obj, struct unicode_str *name,
86 struct symlink *symlink = (struct symlink *)obj;
87 struct unicode_str target_str, name_left;
88 struct object *target;
90 assert( obj->ops == &symlink_ops );
91 if (attr & OBJ_OPENLINK) return NULL;
93 target_str.str = symlink->target;
94 target_str.len = symlink->len;
95 if ((target = find_object_dir( NULL, &target_str, attr, &name_left )))
99 release_object( target );
101 set_error( STATUS_OBJECT_PATH_NOT_FOUND );
107 static unsigned int symlink_map_access( struct object *obj, unsigned int access )
109 if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SYMBOLIC_LINK_QUERY;
110 if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE;
111 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
112 if (access & GENERIC_ALL) access |= SYMBOLIC_LINK_ALL_ACCESS;
113 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
116 static void symlink_destroy( struct object *obj )
118 struct symlink *symlink = (struct symlink *)obj;
119 assert( obj->ops == &symlink_ops );
120 free( symlink->target );
123 struct symlink *create_symlink( struct directory *root, const struct unicode_str *name,
124 unsigned int attr, const struct unicode_str *target )
126 struct symlink *symlink;
130 set_error( STATUS_INVALID_PARAMETER );
133 if ((symlink = create_named_object_dir( root, name, attr, &symlink_ops )) &&
134 (get_error() != STATUS_OBJECT_NAME_EXISTS))
136 if ((symlink->target = memdup( target->str, target->len )))
137 symlink->len = target->len;
140 release_object( symlink );
148 /* create a symbolic link object */
149 DECL_HANDLER(create_symlink)
151 struct symlink *symlink;
152 struct unicode_str name, target;
153 struct directory *root = NULL;
155 if (req->name_len > get_req_data_size())
157 set_error( STATUS_INVALID_PARAMETER );
160 name.str = get_req_data();
161 target.str = name.str + req->name_len / sizeof(WCHAR);
162 name.len = (target.str - name.str) * sizeof(WCHAR);
163 target.len = ((get_req_data_size() - name.len) / sizeof(WCHAR)) * sizeof(WCHAR);
165 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
168 if ((symlink = create_symlink( root, &name, req->attributes, &target )))
170 reply->handle = alloc_handle( current->process, symlink, req->access, req->attributes );
171 release_object( symlink );
174 if (root) release_object( root );
177 /* open a symbolic link object */
178 DECL_HANDLER(open_symlink)
180 struct unicode_str name;
181 struct directory *root = NULL;
182 struct symlink *symlink;
184 get_req_unicode_str( &name );
185 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
188 if ((symlink = open_object_dir( root, &name, req->attributes | OBJ_OPENLINK, &symlink_ops )))
190 reply->handle = alloc_handle( current->process, &symlink->obj, req->access, req->attributes );
191 release_object( symlink );
194 if (root) release_object( root );
197 /* query a symbolic link object */
198 DECL_HANDLER(query_symlink)
200 struct symlink *symlink;
202 symlink = (struct symlink *)get_handle_obj( current->process, req->handle,
203 SYMBOLIC_LINK_QUERY, &symlink_ops );
204 if (!symlink) return;
206 if (get_reply_max_size() < symlink->len)
207 set_error( STATUS_BUFFER_TOO_SMALL );
209 set_reply_data( symlink->target, symlink->len );
210 release_object( symlink );