1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* dir_iterator.c
*
* Copyright (C) 2023 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "io/dir_iterator.h"
#include "util/util.h"
#include "sqfs/error.h"
#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#define UNIX_EPOCH_ON_W32 11644473600UL
#define W32_TICS_PER_SEC 10000000UL
typedef struct {
dir_iterator_t base;
WIN32_FIND_DATAW ent;
HANDLE dirhnd;
int state;
bool is_first;
WCHAR path[];
} dir_iterator_win32_t;
static sqfs_s64 w32time_to_unix(const FILETIME *ft)
{
sqfs_u64 w32ts;
w32ts = ft->dwHighDateTime;
w32ts <<= 32UL;
w32ts |= ft->dwLowDateTime;
w32ts /= W32_TICS_PER_SEC;
if (w32ts <= UNIX_EPOCH_ON_W32)
return -((sqfs_s64)(UNIX_EPOCH_ON_W32 - w32ts));
return w32ts - UNIX_EPOCH_ON_W32;
}
static int dir_iterator_read_link(dir_iterator_t *it, char **out)
{
(void)it;
*out = NULL;
return SQFS_ERROR_UNSUPPORTED;
}
static int dir_iterator_next(dir_iterator_t *it, dir_entry_t **out)
{
dir_iterator_win32_t *w32 = (dir_iterator_win32_t *)it;
dir_entry_t *ent = NULL;
DWORD length;
if (w32->state == 0 && !w32->is_first) {
if (!FindNextFileW(w32->dirhnd, &w32->ent)) {
if (GetLastError() == ERROR_NO_MORE_FILES) {
w32->state = 1;
} else {
w32->state = SQFS_ERROR_IO;
}
}
}
w32->is_first = false;
if (w32->state != 0)
goto out;
length = WideCharToMultiByte(CP_UTF8, 0, w32->ent.cFileName,
-1, NULL, 0, NULL, NULL);
if (length <= 0) {
w32->state = SQFS_ERROR_ALLOC;
goto out;
}
ent = alloc_flex(sizeof(*ent), 1, length + 1);
if (ent == NULL) {
w32->state = SQFS_ERROR_ALLOC;
goto out;
}
WideCharToMultiByte(CP_UTF8, 0, w32->ent.cFileName, -1,
ent->name, length + 1, NULL, NULL);
if (w32->ent.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
ent->mode = S_IFDIR | 0755;
} else {
ent->mode = S_IFREG | 0644;
ent->size = w32->ent.nFileSizeHigh;
ent->size <<= 32UL;
ent->size |= w32->ent.nFileSizeLow;
}
ent->mtime = w32time_to_unix(&(w32->ent.ftLastWriteTime));
out:
*out = ent;
return w32->state;
}
static void dir_iterator_destroy(sqfs_object_t *obj)
{
dir_iterator_win32_t *dir = (dir_iterator_win32_t *)obj;
FindClose(dir->dirhnd);
free(dir);
}
static void dir_iterator_ignore_subdir(dir_iterator_t *it)
{
(void)it;
}
static int dir_iterator_open_file_ro(dir_iterator_t *it, istream_t **out)
{
(void)it;
*out = NULL;
return SQFS_ERROR_UNSUPPORTED;
}
static int dir_iterator_read_xattr(dir_iterator_t *it, sqfs_xattr_t **out)
{
(void)it;
*out = NULL;
return 0;
}
static int dir_iterator_open_subdir(dir_iterator_t *it, dir_iterator_t **out)
{
const dir_iterator_win32_t *dir = (const dir_iterator_win32_t *)it;
dir_iterator_win32_t *sub = NULL;
size_t plen, slen, total;
*out = NULL;
if (dir->state != 0)
return (dir->state > 0) ? SQFS_ERROR_NO_ENTRY : dir->state;
if (!(dir->ent.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
return SQFS_ERROR_NOT_DIR;
plen = wcslen(dir->path) - 1;
slen = wcslen(dir->ent.cFileName);
total = plen + slen + 3;
sub = alloc_flex(sizeof(*sub), sizeof(WCHAR), total);
if (sub == NULL)
return SQFS_ERROR_ALLOC;
memcpy(sub->path, dir->path, plen * sizeof(WCHAR));
memcpy(sub->path + plen, dir->ent.cFileName, slen * sizeof(WCHAR));
sub->path[plen + slen ] = '\\';
sub->path[plen + slen + 1] = '*';
sub->path[plen + slen + 2] = '\0';
sqfs_object_init(sub, dir_iterator_destroy, NULL);
((dir_iterator_t *)sub)->next = dir_iterator_next;
((dir_iterator_t *)sub)->read_link = dir_iterator_read_link;
((dir_iterator_t *)sub)->open_subdir = dir_iterator_open_subdir;
((dir_iterator_t *)sub)->ignore_subdir = dir_iterator_ignore_subdir;
((dir_iterator_t *)sub)->open_file_ro = dir_iterator_open_file_ro;
((dir_iterator_t *)sub)->read_xattr = dir_iterator_read_xattr;
sub->is_first = true;
sub->state = 0;
sub->dirhnd = FindFirstFileW(sub->path, &sub->ent);
if (sub->dirhnd == INVALID_HANDLE_VALUE) {
free(sub);
return SQFS_ERROR_IO;
}
*out = (dir_iterator_t *)sub;
return 0;
}
dir_iterator_t *dir_iterator_create(const char *path)
{
dir_iterator_win32_t *it;
size_t len, newlen;
WCHAR *wpath = NULL;
void *new = NULL;
/* convert path to UTF-16, append "\\*" */
wpath = path_to_windows(path);
if (wpath == NULL)
goto fail_alloc;
len = wcslen(wpath);
newlen = len + 1;
if (len > 0 && wpath[len - 1] != '\\')
newlen += 1;
new = realloc(wpath, sizeof(wpath[0]) * (newlen + 1));
if (new == NULL)
goto fail_alloc;
wpath = new;
if (len > 0 && wpath[len - 1] != '\\')
wpath[len++] = '\\';
wpath[len++] = '*';
wpath[len++] = '\0';
/* create the sourrounding iterator structure */
new = realloc(wpath, sizeof(*it) + len * sizeof(wpath[0]));
if (new == NULL)
goto fail_alloc;
it = new;
wpath = NULL;
memmove(it->path, new, len * sizeof(wpath[0]));
/* initialize */
memset(it, 0, offsetof(dir_iterator_win32_t, path));
sqfs_object_init(it, dir_iterator_destroy, NULL);
((dir_iterator_t *)it)->next = dir_iterator_next;
((dir_iterator_t *)it)->read_link = dir_iterator_read_link;
((dir_iterator_t *)it)->open_subdir = dir_iterator_open_subdir;
((dir_iterator_t *)it)->ignore_subdir = dir_iterator_ignore_subdir;
((dir_iterator_t *)it)->open_file_ro = dir_iterator_open_file_ro;
((dir_iterator_t *)it)->read_xattr = dir_iterator_read_xattr;
it->is_first = true;
it->state = 0;
/* get the directory handle AND the first entry */
it->dirhnd = FindFirstFileW(it->path, &it->ent);
if (it->dirhnd == INVALID_HANDLE_VALUE) {
w32_perror(path);
free(it);
return NULL;
}
return (dir_iterator_t *)it;
fail_alloc:
fprintf(stderr, "%s: allocation failure.\n", path);
free(wpath);
return NULL;
}
|
