| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed 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 "libdm/loop_control.h" |
| |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <android-base/file.h> |
| #include <android-base/unique_fd.h> |
| #include <gtest/gtest.h> |
| #include "test_util.h" |
| |
| using namespace std; |
| using namespace android::dm; |
| using unique_fd = android::base::unique_fd; |
| |
| static unique_fd TempFile() { |
| // A loop device needs to be at least one sector to actually work, so fill |
| // up the file with a message. |
| unique_fd fd(CreateTempFile("temp", 0)); |
| if (fd < 0) { |
| return {}; |
| } |
| char buffer[] = "Hello"; |
| for (size_t i = 0; i < 1000; i++) { |
| if (!android::base::WriteFully(fd, buffer, sizeof(buffer))) { |
| perror("write"); |
| return {}; |
| } |
| } |
| return fd; |
| } |
| |
| TEST(libdm, LoopControl) { |
| unique_fd fd = TempFile(); |
| ASSERT_GE(fd, 0); |
| |
| LoopDevice loop(fd); |
| ASSERT_TRUE(loop.valid()); |
| |
| char buffer[6]; |
| unique_fd loop_fd(open(loop.device().c_str(), O_RDWR)); |
| ASSERT_GE(loop_fd, 0); |
| ASSERT_TRUE(android::base::ReadFully(loop_fd, buffer, sizeof(buffer))); |
| ASSERT_EQ(memcmp(buffer, "Hello", 6), 0); |
| } |