82bac0de6d
this will make the implementation more cleaner, and has error message output when failed on some operations also add the O_TRUNC flag explicitly for the open function called in write_file. And add more test on read_file and write_file functions Test: manual with hikey Change-Id: Ifc1086a20e85db6980b497b1150a8a7952e672d6 Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
115 lines
3.6 KiB
C++
115 lines
3.6 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "util.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <gtest/gtest.h>
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#include <android-base/stringprintf.h>
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#include <android-base/test_utils.h>
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TEST(util, read_file_ENOENT) {
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std::string s("hello");
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errno = 0;
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EXPECT_FALSE(read_file("/proc/does-not-exist", &s));
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EXPECT_EQ(ENOENT, errno);
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EXPECT_EQ("", s); // s was cleared.
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}
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TEST(util, read_file_group_writeable) {
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std::string s("hello");
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TemporaryFile tf;
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ASSERT_TRUE(tf.fd != -1);
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EXPECT_TRUE(write_file(tf.path, s.c_str())) << strerror(errno);
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EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0620, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
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EXPECT_FALSE(read_file(tf.path, &s)) << strerror(errno);
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EXPECT_EQ("", s); // s was cleared.
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}
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TEST(util, read_file_world_writeable) {
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std::string s("hello");
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TemporaryFile tf;
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ASSERT_TRUE(tf.fd != -1);
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EXPECT_TRUE(write_file(tf.path, s.c_str())) << strerror(errno);
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EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0602, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
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EXPECT_FALSE(read_file(tf.path, &s)) << strerror(errno);
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EXPECT_EQ("", s); // s was cleared.
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}
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TEST(util, read_file_symbol_link) {
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std::string s("hello");
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errno = 0;
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// lrwxrwxrwx 1 root root 13 1970-01-01 00:00 charger -> /sbin/healthd
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EXPECT_FALSE(read_file("/charger", &s));
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EXPECT_EQ(ELOOP, errno);
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EXPECT_EQ("", s); // s was cleared.
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}
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TEST(util, read_file_success) {
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std::string s("hello");
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EXPECT_TRUE(read_file("/proc/version", &s));
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EXPECT_GT(s.length(), 6U);
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EXPECT_EQ('\n', s[s.length() - 1]);
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s[5] = 0;
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EXPECT_STREQ("Linux", s.c_str());
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}
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TEST(util, write_file_not_exist) {
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std::string s("hello");
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std::string s2("hello");
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TemporaryDir test_dir;
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std::string path = android::base::StringPrintf("%s/does-not-exist", test_dir.path);
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EXPECT_TRUE(write_file(path.c_str(), s.c_str()));
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EXPECT_TRUE(read_file(path.c_str(), &s2));
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EXPECT_EQ(s, s2);
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struct stat sb;
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int fd = open(path.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
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EXPECT_NE(-1, fd);
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EXPECT_EQ(0, fstat(fd, &sb));
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EXPECT_NE(0u, sb.st_mode & S_IRUSR);
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EXPECT_NE(0u, sb.st_mode & S_IWUSR);
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EXPECT_EQ(0u, sb.st_mode & S_IXUSR);
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EXPECT_EQ(0u, sb.st_mode & S_IRGRP);
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EXPECT_EQ(0u, sb.st_mode & S_IWGRP);
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EXPECT_EQ(0u, sb.st_mode & S_IXGRP);
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EXPECT_EQ(0u, sb.st_mode & S_IROTH);
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EXPECT_EQ(0u, sb.st_mode & S_IWOTH);
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EXPECT_EQ(0u, sb.st_mode & S_IXOTH);
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EXPECT_EQ(0, unlink(path.c_str()));
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}
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TEST(util, write_file_exist) {
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std::string s2("");
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TemporaryFile tf;
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ASSERT_TRUE(tf.fd != -1);
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EXPECT_TRUE(write_file(tf.path, "1hello1")) << strerror(errno);
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EXPECT_TRUE(read_file(tf.path, &s2));
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EXPECT_STREQ("1hello1", s2.c_str());
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EXPECT_TRUE(write_file(tf.path, "2hello2"));
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EXPECT_TRUE(read_file(tf.path, &s2));
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EXPECT_STREQ("2hello2", s2.c_str());
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}
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TEST(util, decode_uid) {
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EXPECT_EQ(0U, decode_uid("root"));
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EXPECT_EQ(UINT_MAX, decode_uid("toot"));
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EXPECT_EQ(123U, decode_uid("123"));
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}
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