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
31 namespace android {
32
33 static const char kTmpDirTemplate[] = "/data/local/tmp/XXXXXX";
34
TempFile(const char * path)35 TempFile::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
~TempFile()57 TempFile::~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
TempDir()67 TempDir::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
~TempDir()74 TempDir::~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
newTempFile()89 TempFile* TempDir::newTempFile() {
90 return new TempFile(mName);
91 }
92
93 } // namespace android
94