394 lines
16 KiB
C++
394 lines
16 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 <stdio.h>
|
|
#include <string>
|
|
|
|
#include "gtest/gtest.h"
|
|
#include "absl/strings/string_view.h"
|
|
#include "test/util/capability_util.h"
|
|
#include "test/util/cleanup.h"
|
|
#include "test/util/file_descriptor.h"
|
|
#include "test/util/fs_util.h"
|
|
#include "test/util/temp_path.h"
|
|
#include "test/util/test_util.h"
|
|
|
|
namespace gvisor {
|
|
namespace testing {
|
|
|
|
namespace {
|
|
|
|
TEST(RenameTest, RootToAnything) {
|
|
ASSERT_THAT(rename("/", "/bin"), SyscallFailsWithErrno(EBUSY));
|
|
}
|
|
|
|
TEST(RenameTest, AnythingToRoot) {
|
|
ASSERT_THAT(rename("/bin", "/"), SyscallFailsWithErrno(EBUSY));
|
|
}
|
|
|
|
TEST(RenameTest, SourceIsAncestorOfTarget) {
|
|
auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto subdir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir.path()));
|
|
ASSERT_THAT(rename(dir.path().c_str(), subdir.path().c_str()),
|
|
SyscallFailsWithErrno(EINVAL));
|
|
|
|
// Try an even deeper directory.
|
|
auto deep_subdir =
|
|
ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(subdir.path()));
|
|
ASSERT_THAT(rename(dir.path().c_str(), deep_subdir.path().c_str()),
|
|
SyscallFailsWithErrno(EINVAL));
|
|
}
|
|
|
|
TEST(RenameTest, TargetIsAncestorOfSource) {
|
|
auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto subdir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir.path()));
|
|
ASSERT_THAT(rename(subdir.path().c_str(), dir.path().c_str()),
|
|
SyscallFailsWithErrno(ENOTEMPTY));
|
|
|
|
// Try an even deeper directory.
|
|
auto deep_subdir =
|
|
ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(subdir.path()));
|
|
ASSERT_THAT(rename(deep_subdir.path().c_str(), dir.path().c_str()),
|
|
SyscallFailsWithErrno(ENOTEMPTY));
|
|
}
|
|
|
|
TEST(RenameTest, FileToSelf) {
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
|
|
EXPECT_THAT(rename(f.path().c_str(), f.path().c_str()), SyscallSucceeds());
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryToSelf) {
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
EXPECT_THAT(rename(f.path().c_str(), f.path().c_str()), SyscallSucceeds());
|
|
}
|
|
|
|
TEST(RenameTest, FileToSameDirectory) {
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
|
|
std::string const newpath = NewTempAbsPath();
|
|
ASSERT_THAT(rename(f.path().c_str(), newpath.c_str()), SyscallSucceeds());
|
|
std::string const oldpath = f.release();
|
|
f.reset(newpath);
|
|
EXPECT_THAT(Exists(oldpath), IsPosixErrorOkAndHolds(false));
|
|
EXPECT_THAT(Exists(newpath), IsPosixErrorOkAndHolds(true));
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryToSameDirectory) {
|
|
auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
std::string const newpath = NewTempAbsPath();
|
|
ASSERT_THAT(rename(dir.path().c_str(), newpath.c_str()), SyscallSucceeds());
|
|
std::string const oldpath = dir.release();
|
|
dir.reset(newpath);
|
|
EXPECT_THAT(Exists(oldpath), IsPosixErrorOkAndHolds(false));
|
|
EXPECT_THAT(Exists(newpath), IsPosixErrorOkAndHolds(true));
|
|
}
|
|
|
|
TEST(RenameTest, FileToParentDirectory) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir1.path()));
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir2.path()));
|
|
std::string const newpath = NewTempAbsPathInDir(dir1.path());
|
|
ASSERT_THAT(rename(f.path().c_str(), newpath.c_str()), SyscallSucceeds());
|
|
std::string const oldpath = f.release();
|
|
f.reset(newpath);
|
|
EXPECT_THAT(Exists(oldpath), IsPosixErrorOkAndHolds(false));
|
|
EXPECT_THAT(Exists(newpath), IsPosixErrorOkAndHolds(true));
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryToParentDirectory) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir1.path()));
|
|
auto dir3 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir2.path()));
|
|
EXPECT_THAT(IsDirectory(dir3.path()), IsPosixErrorOkAndHolds(true));
|
|
std::string const newpath = NewTempAbsPathInDir(dir1.path());
|
|
ASSERT_THAT(rename(dir3.path().c_str(), newpath.c_str()), SyscallSucceeds());
|
|
std::string const oldpath = dir3.release();
|
|
dir3.reset(newpath);
|
|
EXPECT_THAT(Exists(oldpath), IsPosixErrorOkAndHolds(false));
|
|
EXPECT_THAT(Exists(newpath), IsPosixErrorOkAndHolds(true));
|
|
EXPECT_THAT(IsDirectory(newpath), IsPosixErrorOkAndHolds(true));
|
|
}
|
|
|
|
TEST(RenameTest, FileToChildDirectory) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir1.path()));
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path()));
|
|
std::string const newpath = NewTempAbsPathInDir(dir2.path());
|
|
ASSERT_THAT(rename(f.path().c_str(), newpath.c_str()), SyscallSucceeds());
|
|
std::string const oldpath = f.release();
|
|
f.reset(newpath);
|
|
EXPECT_THAT(Exists(oldpath), IsPosixErrorOkAndHolds(false));
|
|
EXPECT_THAT(Exists(newpath), IsPosixErrorOkAndHolds(true));
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryToChildDirectory) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir1.path()));
|
|
auto dir3 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir1.path()));
|
|
std::string const newpath = NewTempAbsPathInDir(dir2.path());
|
|
ASSERT_THAT(rename(dir3.path().c_str(), newpath.c_str()), SyscallSucceeds());
|
|
std::string const oldpath = dir3.release();
|
|
dir3.reset(newpath);
|
|
EXPECT_THAT(Exists(oldpath), IsPosixErrorOkAndHolds(false));
|
|
EXPECT_THAT(Exists(newpath), IsPosixErrorOkAndHolds(true));
|
|
EXPECT_THAT(IsDirectory(newpath), IsPosixErrorOkAndHolds(true));
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryToOwnChildDirectory) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir1.path()));
|
|
std::string const newpath = NewTempAbsPathInDir(dir2.path());
|
|
ASSERT_THAT(rename(dir1.path().c_str(), newpath.c_str()),
|
|
SyscallFailsWithErrno(EINVAL));
|
|
}
|
|
|
|
TEST(RenameTest, FileOverwritesFile) {
|
|
auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
|
|
dir.path(), "first", TempPath::kDefaultFileMode));
|
|
auto f2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
|
|
dir.path(), "second", TempPath::kDefaultFileMode));
|
|
ASSERT_THAT(rename(f1.path().c_str(), f2.path().c_str()), SyscallSucceeds());
|
|
EXPECT_THAT(Exists(f1.path()), IsPosixErrorOkAndHolds(false));
|
|
|
|
f1.release();
|
|
std::string f2_contents;
|
|
ASSERT_NO_ERRNO(GetContents(f2.path(), &f2_contents));
|
|
EXPECT_EQ("first", f2_contents);
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryOverwritesDirectoryLinkCount) {
|
|
auto parent1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
EXPECT_THAT(Links(parent1.path()), IsPosixErrorOkAndHolds(2));
|
|
|
|
auto parent2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
EXPECT_THAT(Links(parent2.path()), IsPosixErrorOkAndHolds(2));
|
|
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(parent1.path()));
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(parent2.path()));
|
|
|
|
EXPECT_THAT(Links(parent1.path()), IsPosixErrorOkAndHolds(3));
|
|
EXPECT_THAT(Links(parent2.path()), IsPosixErrorOkAndHolds(3));
|
|
|
|
ASSERT_THAT(rename(dir1.path().c_str(), dir2.path().c_str()),
|
|
SyscallSucceeds());
|
|
|
|
EXPECT_THAT(Links(parent1.path()), IsPosixErrorOkAndHolds(2));
|
|
EXPECT_THAT(Links(parent2.path()), IsPosixErrorOkAndHolds(3));
|
|
}
|
|
|
|
TEST(RenameTest, FileDoesNotExist) {
|
|
auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
const std::string source = JoinPath(dir.path(), "source");
|
|
const std::string dest = JoinPath(dir.path(), "dest");
|
|
ASSERT_THAT(rename(source.c_str(), dest.c_str()),
|
|
SyscallFailsWithErrno(ENOENT));
|
|
}
|
|
|
|
TEST(RenameTest, FileDoesNotOverwriteDirectory) {
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
|
|
auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
ASSERT_THAT(rename(f.path().c_str(), dir.path().c_str()),
|
|
SyscallFailsWithErrno(EISDIR));
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryDoesNotOverwriteFile) {
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
|
|
auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
ASSERT_THAT(rename(dir.path().c_str(), f.path().c_str()),
|
|
SyscallFailsWithErrno(ENOTDIR));
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryOverwritesEmptyDirectory) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path()));
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
EXPECT_THAT(rename(dir1.path().c_str(), dir2.path().c_str()),
|
|
SyscallSucceeds());
|
|
EXPECT_THAT(Exists(dir1.path()), IsPosixErrorOkAndHolds(false));
|
|
dir1.release();
|
|
EXPECT_THAT(Exists(JoinPath(dir2.path(), Basename(f.path()))),
|
|
IsPosixErrorOkAndHolds(true));
|
|
f.release();
|
|
}
|
|
|
|
TEST(RenameTest, FailsWithDots) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto dir1_dot = absl::StrCat(dir1.path(), "/.");
|
|
auto dir2_dot = absl::StrCat(dir2.path(), "/.");
|
|
auto dir1_dot_dot = absl::StrCat(dir1.path(), "/..");
|
|
auto dir2_dot_dot = absl::StrCat(dir2.path(), "/..");
|
|
|
|
// Try with dot paths in the first argument
|
|
EXPECT_THAT(rename(dir1_dot.c_str(), dir2.path().c_str()),
|
|
SyscallFailsWithErrno(EBUSY));
|
|
EXPECT_THAT(rename(dir1_dot_dot.c_str(), dir2.path().c_str()),
|
|
SyscallFailsWithErrno(EBUSY));
|
|
|
|
// Try with dot paths in the second argument
|
|
EXPECT_THAT(rename(dir1.path().c_str(), dir2_dot.c_str()),
|
|
SyscallFailsWithErrno(EBUSY));
|
|
EXPECT_THAT(rename(dir1.path().c_str(), dir2_dot_dot.c_str()),
|
|
SyscallFailsWithErrno(EBUSY));
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryDoesNotOverwriteNonemptyDirectory) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path()));
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir2.path()));
|
|
ASSERT_THAT(rename(dir1.path().c_str(), dir2.path().c_str()),
|
|
SyscallFailsWithErrno(ENOTEMPTY));
|
|
}
|
|
|
|
TEST(RenameTest, FailsWhenOldParentNotWritable) {
|
|
// Drop capabilities that allow us to override file and directory permissions.
|
|
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
|
|
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false));
|
|
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path()));
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
// dir1 is not writable.
|
|
ASSERT_THAT(chmod(dir1.path().c_str(), 0555), SyscallSucceeds());
|
|
|
|
std::string const newpath = NewTempAbsPathInDir(dir2.path());
|
|
EXPECT_THAT(rename(f1.path().c_str(), newpath.c_str()),
|
|
SyscallFailsWithErrno(EACCES));
|
|
}
|
|
|
|
TEST(RenameTest, FailsWhenNewParentNotWritable) {
|
|
// Drop capabilities that allow us to override file and directory permissions.
|
|
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
|
|
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false));
|
|
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path()));
|
|
// dir2 is not writable.
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(
|
|
TempPath::CreateDirWith(GetAbsoluteTestTmpdir(), 0555));
|
|
|
|
std::string const newpath = NewTempAbsPathInDir(dir2.path());
|
|
EXPECT_THAT(rename(f1.path().c_str(), newpath.c_str()),
|
|
SyscallFailsWithErrno(EACCES));
|
|
}
|
|
|
|
// Equivalent to FailsWhenNewParentNotWritable, but with a destination file
|
|
// to overwrite.
|
|
TEST(RenameTest, OverwriteFailsWhenNewParentNotWritable) {
|
|
// Drop capabilities that allow us to override file and directory permissions.
|
|
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
|
|
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false));
|
|
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path()));
|
|
|
|
// dir2 is not writable.
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir2.path()));
|
|
ASSERT_THAT(chmod(dir2.path().c_str(), 0555), SyscallSucceeds());
|
|
|
|
EXPECT_THAT(rename(f1.path().c_str(), f2.path().c_str()),
|
|
SyscallFailsWithErrno(EACCES));
|
|
}
|
|
|
|
// If the parent directory of source is not accessible, rename returns EACCES
|
|
// because the user cannot determine if source exists.
|
|
TEST(RenameTest, FileDoesNotExistWhenNewParentNotExecutable) {
|
|
// Drop capabilities that allow us to override file and directory permissions.
|
|
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
|
|
ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false));
|
|
|
|
// No execute permission.
|
|
auto dir = ASSERT_NO_ERRNO_AND_VALUE(
|
|
TempPath::CreateDirWith(GetAbsoluteTestTmpdir(), 0400));
|
|
|
|
const std::string source = JoinPath(dir.path(), "source");
|
|
const std::string dest = JoinPath(dir.path(), "dest");
|
|
ASSERT_THAT(rename(source.c_str(), dest.c_str()),
|
|
SyscallFailsWithErrno(EACCES));
|
|
}
|
|
|
|
TEST(RenameTest, DirectoryWithOpenFdOverwritesEmptyDirectory) {
|
|
auto dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path()));
|
|
auto dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
|
|
// Get an fd on dir1
|
|
int fd;
|
|
ASSERT_THAT(fd = open(dir1.path().c_str(), O_DIRECTORY), SyscallSucceeds());
|
|
auto close_f = Cleanup([fd] {
|
|
// Close the fd on f.
|
|
EXPECT_THAT(close(fd), SyscallSucceeds());
|
|
});
|
|
|
|
EXPECT_THAT(rename(dir1.path().c_str(), dir2.path().c_str()),
|
|
SyscallSucceeds());
|
|
|
|
const std::string new_f_path = JoinPath(dir2.path(), Basename(f.path()));
|
|
|
|
auto remove_f = Cleanup([&] {
|
|
// Delete f in its new location.
|
|
ASSERT_NO_ERRNO(Delete(new_f_path));
|
|
f.release();
|
|
});
|
|
|
|
EXPECT_THAT(Exists(dir1.path()), IsPosixErrorOkAndHolds(false));
|
|
dir1.release();
|
|
EXPECT_THAT(Exists(new_f_path), IsPosixErrorOkAndHolds(true));
|
|
}
|
|
|
|
TEST(RenameTest, FileWithOpenFd) {
|
|
TempPath root_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
|
|
TempPath dir1 =
|
|
ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(root_dir.path()));
|
|
TempPath dir2 =
|
|
ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(root_dir.path()));
|
|
TempPath dir3 =
|
|
ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(root_dir.path()));
|
|
|
|
// Create file in dir1.
|
|
constexpr char kContents[] = "foo";
|
|
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
|
|
dir1.path(), kContents, TempPath::kDefaultFileMode));
|
|
|
|
// Get fd on file.
|
|
const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(f.path(), O_RDWR));
|
|
|
|
// Move f to dir2.
|
|
const std::string path2 = NewTempAbsPathInDir(dir2.path());
|
|
ASSERT_THAT(rename(f.path().c_str(), path2.c_str()), SyscallSucceeds());
|
|
|
|
// Read f's kContents.
|
|
char buf[sizeof(kContents)];
|
|
EXPECT_THAT(PreadFd(fd.get(), &buf, sizeof(kContents), 0),
|
|
SyscallSucceedsWithValue(sizeof(kContents) - 1));
|
|
EXPECT_EQ(absl::string_view(buf, sizeof(buf) - 1), kContents);
|
|
|
|
// Move f to dir3.
|
|
const std::string path3 = NewTempAbsPathInDir(dir3.path());
|
|
ASSERT_THAT(rename(path2.c_str(), path3.c_str()), SyscallSucceeds());
|
|
|
|
// Read f's kContents.
|
|
EXPECT_THAT(PreadFd(fd.get(), &buf, sizeof(kContents), 0),
|
|
SyscallSucceedsWithValue(sizeof(kContents) - 1));
|
|
EXPECT_EQ(absl::string_view(buf, sizeof(buf) - 1), kContents);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
} // namespace testing
|
|
} // namespace gvisor
|