160 lines
5.3 KiB
C++
160 lines
5.3 KiB
C++
// Copyright 2018 The gVisor Authors.
|
|
//
|
|
// 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 <fcntl.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
#include <vector>
|
|
|
|
#include "gmock/gmock.h"
|
|
#include "gtest/gtest.h"
|
|
#include "test/util/file_descriptor.h"
|
|
#include "test/util/test_util.h"
|
|
|
|
namespace gvisor {
|
|
namespace testing {
|
|
|
|
namespace {
|
|
|
|
TEST(DevTest, LseekDevUrandom) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/urandom", O_RDONLY));
|
|
EXPECT_THAT(lseek(fd.get(), -10, SEEK_CUR), SyscallSucceeds());
|
|
EXPECT_THAT(lseek(fd.get(), -10, SEEK_SET), SyscallSucceeds());
|
|
EXPECT_THAT(lseek(fd.get(), 0, SEEK_CUR), SyscallSucceeds());
|
|
}
|
|
|
|
TEST(DevTest, LseekDevNull) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/null", O_RDONLY));
|
|
EXPECT_THAT(lseek(fd.get(), -10, SEEK_CUR), SyscallSucceeds());
|
|
EXPECT_THAT(lseek(fd.get(), -10, SEEK_SET), SyscallSucceeds());
|
|
EXPECT_THAT(lseek(fd.get(), 0, SEEK_CUR), SyscallSucceeds());
|
|
EXPECT_THAT(lseek(fd.get(), 0, SEEK_END), SyscallSucceeds());
|
|
}
|
|
|
|
TEST(DevTest, LseekDevZero) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/zero", O_RDONLY));
|
|
EXPECT_THAT(lseek(fd.get(), 0, SEEK_CUR), SyscallSucceeds());
|
|
EXPECT_THAT(lseek(fd.get(), 0, SEEK_END), SyscallSucceeds());
|
|
}
|
|
|
|
TEST(DevTest, LseekDevFull) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/full", O_RDONLY));
|
|
EXPECT_THAT(lseek(fd.get(), 123, SEEK_SET), SyscallSucceedsWithValue(0));
|
|
EXPECT_THAT(lseek(fd.get(), 123, SEEK_CUR), SyscallSucceedsWithValue(0));
|
|
EXPECT_THAT(lseek(fd.get(), 123, SEEK_END), SyscallSucceedsWithValue(0));
|
|
}
|
|
|
|
TEST(DevTest, LseekDevNullFreshFile) {
|
|
// Seeks to /dev/null always return 0.
|
|
const FileDescriptor fd1 =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/null", O_RDONLY));
|
|
const FileDescriptor fd2 =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/null", O_RDONLY));
|
|
|
|
EXPECT_THAT(lseek(fd1.get(), 0, SEEK_CUR), SyscallSucceedsWithValue(0));
|
|
EXPECT_THAT(lseek(fd1.get(), 1000, SEEK_CUR), SyscallSucceedsWithValue(0));
|
|
EXPECT_THAT(lseek(fd2.get(), 0, SEEK_CUR), SyscallSucceedsWithValue(0));
|
|
|
|
const FileDescriptor fd3 =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/null", O_RDONLY));
|
|
EXPECT_THAT(lseek(fd3.get(), 0, SEEK_CUR), SyscallSucceedsWithValue(0));
|
|
}
|
|
|
|
TEST(DevTest, OpenTruncate) {
|
|
// Truncation is ignored on linux and gvisor for device files.
|
|
ASSERT_NO_ERRNO_AND_VALUE(
|
|
Open("/dev/null", O_CREAT | O_TRUNC | O_WRONLY, 0644));
|
|
ASSERT_NO_ERRNO_AND_VALUE(
|
|
Open("/dev/zero", O_CREAT | O_TRUNC | O_WRONLY, 0644));
|
|
ASSERT_NO_ERRNO_AND_VALUE(
|
|
Open("/dev/full", O_CREAT | O_TRUNC | O_WRONLY, 0644));
|
|
}
|
|
|
|
TEST(DevTest, Pread64DevNull) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/null", O_RDONLY));
|
|
char buf[1];
|
|
EXPECT_THAT(pread64(fd.get(), buf, 1, 0), SyscallSucceedsWithValue(0));
|
|
}
|
|
|
|
TEST(DevTest, Pread64DevZero) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/zero", O_RDONLY));
|
|
char buf[1];
|
|
EXPECT_THAT(pread64(fd.get(), buf, 1, 0), SyscallSucceedsWithValue(1));
|
|
}
|
|
|
|
TEST(DevTest, Pread64DevFull) {
|
|
// /dev/full behaves like /dev/zero with respect to reads.
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/full", O_RDONLY));
|
|
char buf[1];
|
|
EXPECT_THAT(pread64(fd.get(), buf, 1, 0), SyscallSucceedsWithValue(1));
|
|
}
|
|
|
|
TEST(DevTest, ReadDevNull) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/null", O_RDONLY));
|
|
std::vector<char> buf(1);
|
|
EXPECT_THAT(ReadFd(fd.get(), buf.data(), 1), SyscallSucceeds());
|
|
}
|
|
|
|
// Do not allow random save as it could lead to partial reads.
|
|
TEST(DevTest, ReadDevZero_NoRandomSave) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/zero", O_RDONLY));
|
|
|
|
constexpr int kReadSize = 128 * 1024;
|
|
std::vector<char> buf(kReadSize, 1);
|
|
EXPECT_THAT(ReadFd(fd.get(), buf.data(), kReadSize),
|
|
SyscallSucceedsWithValue(kReadSize));
|
|
EXPECT_EQ(std::vector<char>(kReadSize, 0), buf);
|
|
}
|
|
|
|
TEST(DevTest, WriteDevNull) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/null", O_WRONLY));
|
|
EXPECT_THAT(WriteFd(fd.get(), "a", 1), SyscallSucceedsWithValue(1));
|
|
}
|
|
|
|
TEST(DevTest, WriteDevZero) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/zero", O_WRONLY));
|
|
EXPECT_THAT(WriteFd(fd.get(), "a", 1), SyscallSucceedsWithValue(1));
|
|
}
|
|
|
|
TEST(DevTest, WriteDevFull) {
|
|
const FileDescriptor fd =
|
|
ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/full", O_WRONLY));
|
|
EXPECT_THAT(WriteFd(fd.get(), "a", 1), SyscallFailsWithErrno(ENOSPC));
|
|
}
|
|
|
|
TEST(DevTest, TTYExists) {
|
|
struct stat statbuf = {};
|
|
ASSERT_THAT(stat("/dev/tty", &statbuf), SyscallSucceeds());
|
|
// Check that it's a character device with rw-rw-rw- permissions.
|
|
EXPECT_EQ(statbuf.st_mode, S_IFCHR | 0666);
|
|
}
|
|
|
|
} // namespace
|
|
} // namespace testing
|
|
|
|
} // namespace gvisor
|