1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "sysdeps/stat.h"
18
19#include <errno.h>
20#include <sys/stat.h>
21#include <sys/types.h>
22#include <unistd.h>
23
24#include <string>
25
26#include <android-base/utf8.h>
27
28// Version of stat() that takes a UTF-8 path.
29int adb_stat(const char* path, struct adb_stat* s) {
30// This definition of wstat seems to be missing from <sys/stat.h>.
31#if defined(_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
32#ifdef _USE_32BIT_TIME_T
33#define wstat _wstat32i64
34#else
35#define wstat _wstat64
36#endif
37#else
38// <sys/stat.h> has a function prototype for wstat() that should be available.
39#endif
40
41    std::wstring path_wide;
42    if (!android::base::UTF8ToWide(path, &path_wide)) {
43        errno = ENOENT;
44        return -1;
45    }
46
47    // If the path has a trailing slash, stat will fail with ENOENT regardless of whether the path
48    // is a directory or not.
49    bool expected_directory = false;
50    while (*path_wide.rbegin() == u'/' || *path_wide.rbegin() == u'\\') {
51        path_wide.pop_back();
52        expected_directory = true;
53    }
54
55    struct adb_stat st;
56    int result = wstat(path_wide.c_str(), &st);
57    if (result == 0 && expected_directory) {
58        if (!S_ISDIR(st.st_mode)) {
59            errno = ENOTDIR;
60            return -1;
61        }
62    }
63
64    memcpy(s, &st, sizeof(st));
65    return result;
66}
67