1 /* 2 * Copyright (C) 2014 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 "NativeBridgeTest.h" 18 19 #include <cstdio> 20 #include <cstring> 21 #include <cutils/log.h> 22 #include <dlfcn.h> 23 #include <errno.h> 24 #include <fcntl.h> 25 #include <stdio.h> 26 #include <sys/mount.h> 27 #include <sys/stat.h> 28 29 namespace android { 30 31 static constexpr const char* kTestData = "PreInitializeNativeBridge test."; 32 33 TEST_F(NativeBridgeTest, PreInitializeNativeBridge) { 34 #ifndef __APPLE__ // Mac OS does not support bind-mount. 35 #ifndef HAVE_ANDROID_OS // Cannot write into the hard-wired location. 36 // Try to create our mount namespace. 37 if (unshare(CLONE_NEWNS) != -1) { 38 // Create a dummy file. 39 FILE* cpuinfo = fopen("./cpuinfo", "w"); 40 ASSERT_NE(nullptr, cpuinfo) << strerror(errno); 41 fprintf(cpuinfo, kTestData); 42 fclose(cpuinfo); 43 44 // Call the setup. 45 PreInitializeNativeBridge("does not matter 1", "short 2"); 46 47 // Read /proc/cpuinfo 48 FILE* proc_cpuinfo = fopen("/proc/cpuinfo", "r"); 49 ASSERT_NE(nullptr, proc_cpuinfo) << strerror(errno); 50 char buf[1024]; 51 EXPECT_NE(nullptr, fgets(buf, sizeof(buf), proc_cpuinfo)) << "Error reading."; 52 fclose(proc_cpuinfo); 53 54 EXPECT_EQ(0, strcmp(buf, kTestData)); 55 56 // Delete the file. 57 ASSERT_EQ(0, unlink("./cpuinfo")) << "Error unlinking temporary file."; 58 // Ending the test will tear down the mount namespace. 59 } else { 60 GTEST_LOG_(WARNING) << "Could not create mount namespace. Are you running this as root?"; 61 } 62 #endif 63 #endif 64 } 65 66 } // namespace android 67
