tools: add afl-fuzz files
[wimlib] / src / iterate_dir.c
1 /*
2  * iterate_dir.c
3  *
4  * Iterate through files in a WIM image.
5  * This is the stable API; internal code can just use for_dentry_in_tree().
6  */
7
8 /*
9  * Copyright (C) 2013-2016 Eric Biggers
10  *
11  * This file is free software; you can redistribute it and/or modify it under
12  * the terms of the GNU Lesser General Public License as published by the Free
13  * Software Foundation; either version 3 of the License, or (at your option) any
14  * later version.
15  *
16  * This file is distributed in the hope that it will be useful, but WITHOUT
17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18  * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
19  * details.
20  *
21  * You should have received a copy of the GNU Lesser General Public License
22  * along with this file; if not, see http://www.gnu.org/licenses/.
23  */
24
25 #ifdef HAVE_CONFIG_H
26 #  include "config.h"
27 #endif
28
29 #include "wimlib.h"
30 #include "wimlib/blob_table.h"
31 #include "wimlib/dentry.h"
32 #include "wimlib/encoding.h"
33 #include "wimlib/metadata.h"
34 #include "wimlib/object_id.h"
35 #include "wimlib/paths.h"
36 #include "wimlib/security.h"
37 #include "wimlib/timestamp.h"
38 #include "wimlib/unix_data.h"
39 #include "wimlib/util.h"
40 #include "wimlib/wim.h"
41
42 static int
43 stream_to_wimlib_stream_entry(const struct wim_inode *inode,
44                               const struct wim_inode_stream *strm,
45                               struct wimlib_stream_entry *wstream,
46                               const struct blob_table *blob_table,
47                               int flags)
48 {
49         const struct blob_descriptor *blob;
50         const u8 *hash;
51
52         if (stream_is_named(strm)) {
53                 int ret;
54
55                 ret = utf16le_get_tstr(strm->stream_name,
56                                        utf16le_len_bytes(strm->stream_name),
57                                        &wstream->stream_name, NULL);
58                 if (ret)
59                         return ret;
60         }
61
62         blob = stream_blob(strm, blob_table);
63         if (blob) {
64                 blob_to_wimlib_resource_entry(blob, &wstream->resource);
65         } else if (!is_zero_hash((hash = stream_hash(strm)))) {
66                 if (flags & WIMLIB_ITERATE_DIR_TREE_FLAG_RESOURCES_NEEDED)
67                         return blob_not_found_error(inode, hash);
68                 copy_hash(wstream->resource.sha1_hash, hash);
69                 wstream->resource.is_missing = 1;
70         }
71         return 0;
72 }
73
74 static int
75 get_default_stream_type(const struct wim_inode *inode)
76 {
77         if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED)
78                 return STREAM_TYPE_EFSRPC_RAW_DATA;
79         if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
80                 return STREAM_TYPE_REPARSE_POINT;
81         return STREAM_TYPE_DATA;
82 }
83
84 static int
85 init_wimlib_dentry(struct wimlib_dir_entry *wdentry, struct wim_dentry *dentry,
86                    WIMStruct *wim, int flags)
87 {
88         int ret;
89         const struct wim_inode *inode = dentry->d_inode;
90         const struct wim_inode_stream *strm;
91         struct wimlib_unix_data unix_data;
92         const void *object_id;
93         u32 object_id_len;
94
95         ret = utf16le_get_tstr(dentry->d_name, dentry->d_name_nbytes,
96                                &wdentry->filename, NULL);
97         if (ret)
98                 return ret;
99
100         ret = utf16le_get_tstr(dentry->d_short_name, dentry->d_short_name_nbytes,
101                                &wdentry->dos_name, NULL);
102         if (ret)
103                 return ret;
104
105         ret = calculate_dentry_full_path(dentry);
106         if (ret)
107                 return ret;
108         wdentry->full_path = dentry->d_full_path;
109
110         for (struct wim_dentry *d = dentry; !dentry_is_root(d); d = d->d_parent)
111                 wdentry->depth++;
112
113         if (inode_has_security_descriptor(inode)) {
114                 struct wim_security_data *sd;
115
116                 sd = wim_get_current_security_data(wim);
117                 wdentry->security_descriptor = sd->descriptors[inode->i_security_id];
118                 wdentry->security_descriptor_size = sd->sizes[inode->i_security_id];
119         }
120         wdentry->reparse_tag = inode->i_reparse_tag;
121         wdentry->num_links = inode->i_nlink;
122         wdentry->attributes = inode->i_attributes;
123         wdentry->hard_link_group_id = inode->i_ino;
124
125         wim_timestamp_to_wimlib_timespec(inode->i_creation_time,
126                                          &wdentry->creation_time,
127                                          &wdentry->creation_time_high);
128
129         wim_timestamp_to_wimlib_timespec(inode->i_last_write_time,
130                                          &wdentry->last_write_time,
131                                          &wdentry->last_write_time_high);
132
133         wim_timestamp_to_wimlib_timespec(inode->i_last_access_time,
134                                          &wdentry->last_access_time,
135                                          &wdentry->last_access_time_high);
136
137         if (inode_get_unix_data(inode, &unix_data)) {
138                 wdentry->unix_uid = unix_data.uid;
139                 wdentry->unix_gid = unix_data.gid;
140                 wdentry->unix_mode = unix_data.mode;
141                 wdentry->unix_rdev = unix_data.rdev;
142         }
143         object_id = inode_get_object_id(inode, &object_id_len);
144         if (unlikely(object_id != NULL)) {
145                 memcpy(&wdentry->object_id, object_id,
146                        min(object_id_len, sizeof(wdentry->object_id)));
147         }
148
149         strm = inode_get_unnamed_stream(inode, get_default_stream_type(inode));
150         if (strm) {
151                 ret = stream_to_wimlib_stream_entry(inode, strm,
152                                                     &wdentry->streams[0],
153                                                     wim->blob_table, flags);
154                 if (ret)
155                         return ret;
156         }
157
158         for (unsigned i = 0; i < inode->i_num_streams; i++) {
159
160                 strm = &inode->i_streams[i];
161
162                 if (!stream_is_named_data_stream(strm))
163                         continue;
164
165                 wdentry->num_named_streams++;
166
167                 ret = stream_to_wimlib_stream_entry(inode, strm,
168                                                     &wdentry->streams[
169                                                         wdentry->num_named_streams],
170                                                     wim->blob_table, flags);
171                 if (ret)
172                         return ret;
173         }
174         return 0;
175 }
176
177 static void
178 free_wimlib_dentry(struct wimlib_dir_entry *wdentry)
179 {
180         utf16le_put_tstr(wdentry->filename);
181         utf16le_put_tstr(wdentry->dos_name);
182         for (unsigned i = 1; i <= wdentry->num_named_streams; i++)
183                 utf16le_put_tstr(wdentry->streams[i].stream_name);
184         FREE(wdentry);
185 }
186
187 static int
188 do_iterate_dir_tree(WIMStruct *wim,
189                     struct wim_dentry *dentry, int flags,
190                     wimlib_iterate_dir_tree_callback_t cb,
191                     void *user_ctx)
192 {
193         struct wimlib_dir_entry *wdentry;
194         int ret = WIMLIB_ERR_NOMEM;
195
196
197         wdentry = CALLOC(1, sizeof(struct wimlib_dir_entry) +
198                                   (1 + dentry->d_inode->i_num_streams) *
199                                         sizeof(struct wimlib_stream_entry));
200         if (wdentry == NULL)
201                 goto out;
202
203         ret = init_wimlib_dentry(wdentry, dentry, wim, flags);
204         if (ret)
205                 goto out_free_wimlib_dentry;
206
207         if (!(flags & WIMLIB_ITERATE_DIR_TREE_FLAG_CHILDREN)) {
208                 ret = (*cb)(wdentry, user_ctx);
209                 if (ret)
210                         goto out_free_wimlib_dentry;
211         }
212
213         if (flags & (WIMLIB_ITERATE_DIR_TREE_FLAG_RECURSIVE |
214                      WIMLIB_ITERATE_DIR_TREE_FLAG_CHILDREN))
215         {
216                 struct wim_dentry *child;
217
218                 ret = 0;
219                 for_dentry_child(child, dentry) {
220                         ret = do_iterate_dir_tree(wim, child,
221                                                   flags & ~WIMLIB_ITERATE_DIR_TREE_FLAG_CHILDREN,
222                                                   cb, user_ctx);
223                         if (ret)
224                                 break;
225                 }
226         }
227 out_free_wimlib_dentry:
228         FREE(dentry->d_full_path);
229         dentry->d_full_path = NULL;
230         free_wimlib_dentry(wdentry);
231 out:
232         return ret;
233 }
234
235 struct image_iterate_dir_tree_ctx {
236         const tchar *path;
237         int flags;
238         wimlib_iterate_dir_tree_callback_t cb;
239         void *user_ctx;
240 };
241
242
243 static int
244 image_do_iterate_dir_tree(WIMStruct *wim)
245 {
246         struct image_iterate_dir_tree_ctx *ctx = wim->private;
247         struct wim_dentry *dentry;
248
249         dentry = get_dentry(wim, ctx->path, WIMLIB_CASE_PLATFORM_DEFAULT);
250         if (dentry == NULL)
251                 return WIMLIB_ERR_PATH_DOES_NOT_EXIST;
252         return do_iterate_dir_tree(wim, dentry, ctx->flags, ctx->cb, ctx->user_ctx);
253 }
254
255 /* API function documented in wimlib.h  */
256 WIMLIBAPI int
257 wimlib_iterate_dir_tree(WIMStruct *wim, int image, const tchar *_path,
258                         int flags,
259                         wimlib_iterate_dir_tree_callback_t cb, void *user_ctx)
260 {
261         tchar *path;
262         int ret;
263
264         if (flags & ~(WIMLIB_ITERATE_DIR_TREE_FLAG_RECURSIVE |
265                       WIMLIB_ITERATE_DIR_TREE_FLAG_CHILDREN |
266                       WIMLIB_ITERATE_DIR_TREE_FLAG_RESOURCES_NEEDED))
267                 return WIMLIB_ERR_INVALID_PARAM;
268
269         path = canonicalize_wim_path(_path);
270         if (path == NULL)
271                 return WIMLIB_ERR_NOMEM;
272         struct image_iterate_dir_tree_ctx ctx = {
273                 .path = path,
274                 .flags = flags,
275                 .cb = cb,
276                 .user_ctx = user_ctx,
277         };
278         wim->private = &ctx;
279         ret = for_image(wim, image, image_do_iterate_dir_tree);
280         FREE(path);
281         return ret;
282 }