1/*
2 * Copyright (C) 2015 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#define LOG_TAG "TestHelpers"
18#define LOG_NDEBUG 0
19
20#include "TestHelpers.h"
21
22#include <dirent.h>
23#include <fcntl.h>
24#include <stdlib.h>
25#include <sys/stat.h>
26#include <sys/types.h>
27#include <unistd.h>
28
29#include <utils/Log.h>
30
31namespace android {
32
33static const char kTmpDirTemplate[] = "/data/local/tmp/XXXXXX";
34
35TempFile::TempFile(const char* path) {
36    bool needTrailingSlash = path[strlen(path) - 1] != '/';
37    // name = path + XXXXXX + \0
38    size_t nameLen = strlen(path) + 6 + 1;
39    if (needTrailingSlash) nameLen++;
40
41    mName = new char[nameLen];
42    strcpy(mName, path);
43    if (needTrailingSlash) {
44        strcat(mName, "/");
45    }
46    strcat(mName, "XXXXXX");
47    mName = mktemp(mName);
48    LOG_FATAL_IF(mName == nullptr, "could not create temp filename %s. errno=%d", mName, errno);
49
50    int result = TEMP_FAILURE_RETRY(mkfifo(mName, S_IRWXU));
51    LOG_FATAL_IF(result < 0, "could not create fifo %s. errno=%d", mName, errno);
52
53    mFd = TEMP_FAILURE_RETRY(open(mName, O_RDWR | O_NONBLOCK));
54    LOG_FATAL_IF(mFd < 0, "could not open fifo %s. errno=%d", mName, errno);
55}
56
57TempFile::~TempFile() {
58    if (unlink(mName) < 0) {
59        ALOGE("could not unlink %s. errno=%d", mName, errno);
60    }
61    if (close(mFd) < 0) {
62        ALOGE("could not close %d. errno=%d", mFd, errno);
63    }
64    delete[] mName;
65}
66
67TempDir::TempDir() {
68    mName = new char[sizeof(kTmpDirTemplate)];
69    strcpy(mName, kTmpDirTemplate);
70    mName = mkdtemp(mName);
71    LOG_FATAL_IF(mName == nullptr, "could not allocate tempdir %s", mName);
72}
73
74TempDir::~TempDir() {
75    auto tmpDir = opendir(mName);
76    while (auto entry = readdir(tmpDir)) {
77        if (strcmp(entry->d_name, ".") == 0 ||
78            strcmp(entry->d_name, "..") == 0) {
79            continue;
80        }
81        ALOGD("stale file %s, removing", entry->d_name);
82        unlink(entry->d_name);
83    }
84    closedir(tmpDir);
85    rmdir(mName);
86    delete mName;
87}
88
89TempFile* TempDir::newTempFile() {
90    return new TempFile(mName);
91}
92
93}  // namespace android
94