summaryrefslogtreecommitdiffstats
path: root/file_io/win32/filesys.c
blob: e812139551acc6ab03519412933c3aa4e6782863 (plain)
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
/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "apr.h"
#include "apr_arch_file_io.h"
#include "apr_strings.h"

/* Win32 Exceptions:
 *
 * Note that trailing spaces and trailing periods are never recorded
 * in the file system, except by a very obscure bug where any file
 * that is created with a trailing space or period, followed by the 
 * ':' stream designator on an NTFS volume can never be accessed again.
 * In other words, don't ever accept them when designating a stream!
 *
 * An interesting side effect is that two or three periods are both 
 * treated as the parent directory, although the fourth and on are
 * not [strongly suggest all trailing periods are trimmed off, or
 * down to two if there are no other characters.]
 *
 * Leading spaces and periods are accepted, however.
 * The * ? < > codes all have wildcard side effects
 * The " / \ : are exclusively component separator tokens 
 * The system doesn't accept | for any (known) purpose 
 * Oddly, \x7f _is_ acceptable ;)
 */

/* apr_c_is_fnchar[] maps Win32's file name and shell escape symbols
 *
 *   element & 1 == valid file name character [excluding delimiters]
 *   element & 2 == character should be shell (caret) escaped from cmd.exe
 *
 * this must be in-sync with Apache httpd's gen_test_char.c for cgi escaping.
 */

const char apr_c_is_fnchar[256] =
{/* Reject all ctrl codes... Escape \n and \r (ascii 10 and 13)      */
    0,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 /*   ! " # $ % & ' ( ) * + , - . /  0 1 2 3 4 5 6 7 8 9 : ; < = > ? */
    1,1,2,1,3,3,3,3,3,3,2,1,1,1,1,0, 1,1,1,1,1,1,1,1,1,1,0,3,2,1,2,2,
 /* @ A B C D E F G H I J K L M N O  P Q R S T U V W X Y Z [ \ ] ^ _ */
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,3,2,3,3,1,
 /* ` a b c d e f g h i j k l m n o  p q r s t u v w x y z { | } ~   */
    3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,3,2,3,3,1,
 /* High bit codes are accepted (subject to utf-8->Unicode xlation)  */
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
};


apr_status_t filepath_root_test(char *path, apr_pool_t *p)
{
    apr_status_t rv;
#if APR_HAS_UNICODE_FS
    if (apr_os_level >= APR_WIN_NT)
    {
        apr_wchar_t wpath[APR_PATH_MAX];
        if ((rv = utf8_to_unicode_path(wpath, sizeof(wpath) 
                                            / sizeof(apr_wchar_t), path)))
            return rv;
        rv = GetDriveTypeW(wpath);
    }
    else
#endif
        rv = GetDriveType(path);

    if (rv == DRIVE_UNKNOWN || rv == DRIVE_NO_ROOT_DIR)
        return APR_EBADPATH;
    return APR_SUCCESS;
}


apr_status_t filepath_drive_get(char **rootpath, char drive, 
                                apr_int32_t flags, apr_pool_t *p)
{
    char path[APR_PATH_MAX];
#if APR_HAS_UNICODE_FS
    IF_WIN_OS_IS_UNICODE
    {
        apr_wchar_t *ignored;
        apr_wchar_t wdrive[8];
        apr_wchar_t wpath[APR_PATH_MAX];
        apr_status_t rv;
        /* ???: This needs review, apparently "\\?\d:." returns "\\?\d:" 
         * as if that is useful for anything.
         */
        wcscpy(wdrive, L"D:.");
        wdrive[0] = (apr_wchar_t)(unsigned char)drive;
        if (!GetFullPathNameW(wdrive, sizeof(wpath) / sizeof(apr_wchar_t), wpath, &ignored))
            return apr_get_os_error();
        if ((rv = unicode_to_utf8_path(path, sizeof(path), wpath)))
            return rv;
    }
#endif
#if APR_HAS_ANSI_FS
    ELSE_WIN_OS_IS_ANSI
    {
        char *ignored;
        char drivestr[4];
        drivestr[0] = drive;
        drivestr[1] = ':';
        drivestr[2] = '.';;
        drivestr[3] = '\0';
        if (!GetFullPathName(drivestr, sizeof(path), path, &ignored))
            return apr_get_os_error();
    }
#endif
    if (!(flags & APR_FILEPATH_NATIVE)) {
        for (*rootpath = path; **rootpath; ++*rootpath) {
            if (**rootpath == '\\')
                **rootpath = '/';
        }
    }
    *rootpath = apr_pstrdup(p, path);
    return APR_SUCCESS;
}


apr_status_t filepath_root_case(char **rootpath, char *root, apr_pool_t *p)
{
#if APR_HAS_UNICODE_FS
    IF_WIN_OS_IS_UNICODE
    {
        apr_wchar_t *ignored;
        apr_wchar_t wpath[APR_PATH_MAX];
        apr_status_t rv;
        apr_wchar_t wroot[APR_PATH_MAX];
        /* ???: This needs review, apparently "\\?\d:." returns "\\?\d:" 
         * as if that is useful for anything.
         */
        if ((rv = utf8_to_unicode_path(wroot, sizeof(wroot) 
                                            / sizeof(apr_wchar_t), root)))
            return rv;
        if (!GetFullPathNameW(wroot, sizeof(wpath) / sizeof(apr_wchar_t), wpath, &ignored))
            return apr_get_os_error();

        /* Borrow wroot as a char buffer (twice as big as necessary) 
         */
        if ((rv = unicode_to_utf8_path((char*)wroot, sizeof(wroot), wpath)))
            return rv;
        *rootpath = apr_pstrdup(p, (char*)wroot);
    }
#endif
#if APR_HAS_ANSI_FS
    ELSE_WIN_OS_IS_ANSI
    {
        char path[APR_PATH_MAX];
        char *ignored;
        if (!GetFullPathName(root, sizeof(path), path, &ignored))
            return apr_get_os_error();
        *rootpath = apr_pstrdup(p, path);
    }
#endif
    return APR_SUCCESS;
}


APR_DECLARE(apr_status_t) apr_filepath_get(char **rootpath, apr_int32_t flags,
                                           apr_pool_t *p)
{
    char path[APR_PATH_MAX];
#if APR_HAS_UNICODE_FS
    IF_WIN_OS_IS_UNICODE
    {
        apr_wchar_t wpath[APR_PATH_MAX];
        apr_status_t rv;
        if (!GetCurrentDirectoryW(sizeof(wpath) / sizeof(apr_wchar_t), wpath))
            return apr_get_os_error();
        if ((rv = unicode_to_utf8_path(path, sizeof(path), wpath)))
            return rv;
    }
#endif
#if APR_HAS_ANSI_FS
    ELSE_WIN_OS_IS_ANSI
    {
        if (!GetCurrentDirectory(sizeof(path), path))
            return apr_get_os_error();
    }
#endif
    if (!(flags & APR_FILEPATH_NATIVE)) {
        for (*rootpath = path; **rootpath; ++*rootpath) {
            if (**rootpath == '\\')
                **rootpath = '/';
        }
    }
    *rootpath = apr_pstrdup(p, path);
    return APR_SUCCESS;
}


APR_DECLARE(apr_status_t) apr_filepath_set(const char *rootpath,
                                           apr_pool_t *p)
{
#if APR_HAS_UNICODE_FS
    IF_WIN_OS_IS_UNICODE
    {
        apr_wchar_t wpath[APR_PATH_MAX];
        apr_status_t rv;
        if ((rv = utf8_to_unicode_path(wpath, sizeof(wpath) 
                                            / sizeof(apr_wchar_t), rootpath)))
            return rv;
        if (!SetCurrentDirectoryW(wpath))
            return apr_get_os_error();
    }
#endif
#if APR_HAS_ANSI_FS
    ELSE_WIN_OS_IS_ANSI
    {
        if (!SetCurrentDirectory(rootpath))
            return apr_get_os_error();
    }
#endif
    return APR_SUCCESS;
}