Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame^] | 1 | // libminijail_unittest.cpp |
| 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 | // Test platform independent logic of Minijail using gtest. |
| 17 | |
| 18 | #include <errno.h> |
| 19 | |
| 20 | #include <sys/types.h> |
| 21 | #include <sys/wait.h> |
| 22 | |
| 23 | #include <gtest/gtest.h> |
| 24 | |
| 25 | #include "libminijail.h" |
| 26 | #include "libminijail-private.h" |
| 27 | #include "util.h" |
| 28 | |
| 29 | /* Prototypes needed only by test. */ |
| 30 | void *consumebytes(size_t length, char **buf, size_t *buflength); |
| 31 | char *consumestr(char **buf, size_t *buflength); |
| 32 | |
| 33 | /* Silence unused variable warnings. */ |
| 34 | TEST(silence, silence_unused) { |
| 35 | EXPECT_STREQ(kLdPreloadEnvVar, kLdPreloadEnvVar); |
| 36 | EXPECT_STREQ(kFdEnvVar, kFdEnvVar); |
| 37 | EXPECT_STRNE(kFdEnvVar, kLdPreloadEnvVar); |
| 38 | } |
| 39 | |
| 40 | TEST(consumebytes, zero) { |
| 41 | char buf[1024]; |
| 42 | size_t len = sizeof(buf); |
| 43 | char *pos = &buf[0]; |
| 44 | EXPECT_TRUE(NULL != consumebytes(0, &pos, &len)); |
| 45 | EXPECT_EQ(&buf[0], pos); |
| 46 | EXPECT_EQ(sizeof(buf), len); |
| 47 | } |
| 48 | |
| 49 | TEST(consumebytes, exact) { |
| 50 | char buf[1024]; |
| 51 | size_t len = sizeof(buf); |
| 52 | char *pos = &buf[0]; |
| 53 | /* One past the end since it consumes the whole buffer. */ |
| 54 | char *end = &buf[sizeof(buf)]; |
| 55 | EXPECT_TRUE(NULL != consumebytes(len, &pos, &len)); |
| 56 | EXPECT_EQ((size_t)0, len); |
| 57 | EXPECT_EQ(end, pos); |
| 58 | } |
| 59 | |
| 60 | TEST(consumebytes, half) { |
| 61 | char buf[1024]; |
| 62 | size_t len = sizeof(buf); |
| 63 | char *pos = &buf[0]; |
| 64 | /* One past the end since it consumes the whole buffer. */ |
| 65 | char *end = &buf[sizeof(buf) / 2]; |
| 66 | EXPECT_TRUE(NULL != consumebytes(len / 2, &pos, &len)); |
| 67 | EXPECT_EQ(sizeof(buf) / 2, len); |
| 68 | EXPECT_EQ(end, pos); |
| 69 | } |
| 70 | |
| 71 | TEST(consumebytes, toolong) { |
| 72 | char buf[1024]; |
| 73 | size_t len = sizeof(buf); |
| 74 | char *pos = &buf[0]; |
| 75 | /* One past the end since it consumes the whole buffer. */ |
| 76 | EXPECT_TRUE(NULL == consumebytes(len + 1, &pos, &len)); |
| 77 | EXPECT_EQ(sizeof(buf), len); |
| 78 | EXPECT_EQ(&buf[0], pos); |
| 79 | } |
| 80 | |
| 81 | TEST(consumestr, zero) { |
| 82 | char buf[1024]; |
| 83 | size_t len = 0; |
| 84 | char *pos = &buf[0]; |
| 85 | memset(buf, 0xff, sizeof(buf)); |
| 86 | EXPECT_EQ(NULL, consumestr(&pos, &len)); |
| 87 | EXPECT_EQ((size_t)0, len); |
| 88 | EXPECT_EQ(&buf[0], pos); |
| 89 | } |
| 90 | |
| 91 | TEST(consumestr, nonul) { |
| 92 | char buf[1024]; |
| 93 | size_t len = sizeof(buf); |
| 94 | char *pos = &buf[0]; |
| 95 | memset(buf, 0xff, sizeof(buf)); |
| 96 | EXPECT_EQ(NULL, consumestr(&pos, &len)); |
| 97 | EXPECT_EQ(sizeof(buf), len); |
| 98 | EXPECT_EQ(&buf[0], pos); |
| 99 | } |
| 100 | |
| 101 | TEST(consumestr, full) { |
| 102 | char buf[1024]; |
| 103 | size_t len = sizeof(buf); |
| 104 | char *pos = &buf[0]; |
| 105 | memset(buf, 0xff, sizeof(buf)); |
| 106 | buf[sizeof(buf)-1] = '\0'; |
| 107 | EXPECT_EQ((void *)buf, consumestr(&pos, &len)); |
| 108 | EXPECT_EQ((size_t)0, len); |
| 109 | EXPECT_EQ(&buf[sizeof(buf)], pos); |
| 110 | } |
| 111 | |
| 112 | TEST(consumestr, trailing_nul) { |
| 113 | char buf[1024]; |
| 114 | size_t len = sizeof(buf) - 1; |
| 115 | char *pos = &buf[0]; |
| 116 | memset(buf, 0xff, sizeof(buf)); |
| 117 | buf[sizeof(buf)-1] = '\0'; |
| 118 | EXPECT_EQ(NULL, consumestr(&pos, &len)); |
| 119 | EXPECT_EQ(sizeof(buf) - 1, len); |
| 120 | EXPECT_EQ(&buf[0], pos); |
| 121 | } |
| 122 | |
| 123 | class MarshalTest : public ::testing::Test { |
| 124 | protected: |
| 125 | virtual void SetUp() { |
| 126 | m_ = minijail_new(); |
| 127 | j_ = minijail_new(); |
| 128 | size_ = minijail_size(m_); |
| 129 | } |
| 130 | virtual void TearDown() { |
| 131 | minijail_destroy(m_); |
| 132 | minijail_destroy(j_); |
| 133 | } |
| 134 | |
| 135 | char buf_[4096]; |
| 136 | struct minijail *m_; |
| 137 | struct minijail *j_; |
| 138 | size_t size_; |
| 139 | }; |
| 140 | |
| 141 | TEST_F(MarshalTest, empty) { |
| 142 | ASSERT_EQ(0, minijail_marshal(m_, buf_, sizeof(buf_))); |
| 143 | EXPECT_EQ(0, minijail_unmarshal(j_, buf_, size_)); |
| 144 | } |
| 145 | |
| 146 | TEST_F(MarshalTest, 0xff) { |
| 147 | memset(buf_, 0xff, sizeof(buf_)); |
| 148 | /* Should fail on the first consumestr since a NUL will never be found. */ |
| 149 | EXPECT_EQ(-EINVAL, minijail_unmarshal(j_, buf_, sizeof(buf_))); |
| 150 | } |
| 151 | |
| 152 | TEST(Test, minijail_run_pid_pipes_no_preload) { |
| 153 | pid_t pid; |
| 154 | int child_stdin, child_stdout, child_stderr; |
| 155 | int mj_run_ret; |
| 156 | ssize_t write_ret, read_ret; |
| 157 | const size_t buf_len = 128; |
| 158 | char buf[buf_len]; |
| 159 | int status; |
| 160 | #if defined(__ANDROID__) |
| 161 | char filename[] = "/system/bin/cat"; |
| 162 | #else |
| 163 | char filename[] = "/bin/cat"; |
| 164 | #endif |
| 165 | char teststr[] = "test\n"; |
| 166 | size_t teststr_len = strlen(teststr); |
| 167 | char *argv[4]; |
| 168 | |
| 169 | struct minijail *j = minijail_new(); |
| 170 | |
| 171 | argv[0] = filename; |
| 172 | argv[1] = NULL; |
| 173 | mj_run_ret = minijail_run_pid_pipes_no_preload(j, argv[0], argv, |
| 174 | &pid, |
| 175 | &child_stdin, &child_stdout, |
| 176 | NULL); |
| 177 | EXPECT_EQ(mj_run_ret, 0); |
| 178 | |
| 179 | write_ret = write(child_stdin, teststr, teststr_len); |
| 180 | EXPECT_EQ(write_ret, (int)teststr_len); |
| 181 | |
| 182 | read_ret = read(child_stdout, buf, 8); |
| 183 | EXPECT_EQ(read_ret, (int)teststr_len); |
| 184 | buf[teststr_len] = 0; |
| 185 | EXPECT_EQ(strcmp(buf, teststr), 0); |
| 186 | |
| 187 | EXPECT_EQ(kill(pid, SIGTERM), 0); |
| 188 | waitpid(pid, &status, 0); |
| 189 | ASSERT_TRUE(WIFSIGNALED(status)); |
| 190 | EXPECT_EQ(WTERMSIG(status), SIGTERM); |
| 191 | |
| 192 | #if defined(__ANDROID__) |
| 193 | argv[0] = "/system/bin/sh"; |
| 194 | #else |
| 195 | argv[0] = "/bin/sh"; |
| 196 | #endif |
| 197 | argv[1] = "-c"; |
| 198 | argv[2] = "echo test >&2"; |
| 199 | argv[3] = NULL; |
| 200 | mj_run_ret = minijail_run_pid_pipes_no_preload(j, argv[0], argv, &pid, |
| 201 | &child_stdin, &child_stdout, |
| 202 | &child_stderr); |
| 203 | EXPECT_EQ(mj_run_ret, 0); |
| 204 | |
| 205 | read_ret = read(child_stderr, buf, buf_len); |
| 206 | EXPECT_GE(read_ret, (int)teststr_len); |
| 207 | |
| 208 | waitpid(pid, &status, 0); |
| 209 | ASSERT_TRUE(WIFEXITED(status)); |
| 210 | EXPECT_EQ(WEXITSTATUS(status), 0); |
| 211 | |
| 212 | minijail_destroy(j); |
| 213 | } |