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-rw-r--r--test/syscalls/linux/truncate.cc248
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diff --git a/test/syscalls/linux/truncate.cc b/test/syscalls/linux/truncate.cc
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index 17832c47d..000000000
--- a/test/syscalls/linux/truncate.cc
+++ /dev/null
@@ -1,248 +0,0 @@
-// 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 <errno.h>
-#include <signal.h>
-#include <sys/resource.h>
-#include <sys/stat.h>
-#include <sys/vfs.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <iostream>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/string_view.h"
-#include "test/syscalls/linux/file_base.h"
-#include "test/util/capability_util.h"
-#include "test/util/cleanup.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/temp_path.h"
-#include "test/util/test_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-class FixtureTruncateTest : public FileTest {
- void SetUp() override { FileTest::SetUp(); }
-};
-
-TEST_F(FixtureTruncateTest, Truncate) {
- // Get the current rlimit and restore after test run.
- struct rlimit initial_lim;
- ASSERT_THAT(getrlimit(RLIMIT_FSIZE, &initial_lim), SyscallSucceeds());
- auto cleanup = Cleanup([&initial_lim] {
- EXPECT_THAT(setrlimit(RLIMIT_FSIZE, &initial_lim), SyscallSucceeds());
- });
-
- // Check that it starts at size zero.
- struct stat buf;
- ASSERT_THAT(fstat(test_file_fd_.get(), &buf), SyscallSucceeds());
- EXPECT_EQ(buf.st_size, 0);
-
- // Stay at size zero.
- EXPECT_THAT(truncate(test_file_name_.c_str(), 0), SyscallSucceeds());
- ASSERT_THAT(fstat(test_file_fd_.get(), &buf), SyscallSucceeds());
- EXPECT_EQ(buf.st_size, 0);
-
- // Grow to ten bytes.
- EXPECT_THAT(truncate(test_file_name_.c_str(), 10), SyscallSucceeds());
- ASSERT_THAT(fstat(test_file_fd_.get(), &buf), SyscallSucceeds());
- EXPECT_EQ(buf.st_size, 10);
-
- // Can't be truncated to a negative number.
- EXPECT_THAT(truncate(test_file_name_.c_str(), -1),
- SyscallFailsWithErrno(EINVAL));
-
- // Try growing past the file size limit.
- sigset_t new_mask;
- sigemptyset(&new_mask);
- sigaddset(&new_mask, SIGXFSZ);
- sigprocmask(SIG_BLOCK, &new_mask, nullptr);
- struct timespec timelimit;
- timelimit.tv_sec = 10;
- timelimit.tv_nsec = 0;
-
- struct rlimit setlim;
- setlim.rlim_cur = 1024;
- setlim.rlim_max = RLIM_INFINITY;
- ASSERT_THAT(setrlimit(RLIMIT_FSIZE, &setlim), SyscallSucceeds());
- EXPECT_THAT(truncate(test_file_name_.c_str(), 1025),
- SyscallFailsWithErrno(EFBIG));
- EXPECT_EQ(sigtimedwait(&new_mask, nullptr, &timelimit), SIGXFSZ);
- ASSERT_THAT(sigprocmask(SIG_UNBLOCK, &new_mask, nullptr), SyscallSucceeds());
-
- // Shrink back down to zero.
- EXPECT_THAT(truncate(test_file_name_.c_str(), 0), SyscallSucceeds());
- ASSERT_THAT(fstat(test_file_fd_.get(), &buf), SyscallSucceeds());
- EXPECT_EQ(buf.st_size, 0);
-}
-
-TEST_F(FixtureTruncateTest, Ftruncate) {
- // Get the current rlimit and restore after test run.
- struct rlimit initial_lim;
- ASSERT_THAT(getrlimit(RLIMIT_FSIZE, &initial_lim), SyscallSucceeds());
- auto cleanup = Cleanup([&initial_lim] {
- EXPECT_THAT(setrlimit(RLIMIT_FSIZE, &initial_lim), SyscallSucceeds());
- });
-
- // Check that it starts at size zero.
- struct stat buf;
- ASSERT_THAT(fstat(test_file_fd_.get(), &buf), SyscallSucceeds());
- EXPECT_EQ(buf.st_size, 0);
-
- // Stay at size zero.
- EXPECT_THAT(ftruncate(test_file_fd_.get(), 0), SyscallSucceeds());
- ASSERT_THAT(fstat(test_file_fd_.get(), &buf), SyscallSucceeds());
- EXPECT_EQ(buf.st_size, 0);
-
- // Grow to ten bytes.
- EXPECT_THAT(ftruncate(test_file_fd_.get(), 10), SyscallSucceeds());
- ASSERT_THAT(fstat(test_file_fd_.get(), &buf), SyscallSucceeds());
- EXPECT_EQ(buf.st_size, 10);
-
- // Can't be truncated to a negative number.
- EXPECT_THAT(ftruncate(test_file_fd_.get(), -1),
- SyscallFailsWithErrno(EINVAL));
-
- // Try growing past the file size limit.
- sigset_t new_mask;
- sigemptyset(&new_mask);
- sigaddset(&new_mask, SIGXFSZ);
- sigprocmask(SIG_BLOCK, &new_mask, nullptr);
- struct timespec timelimit;
- timelimit.tv_sec = 10;
- timelimit.tv_nsec = 0;
-
- struct rlimit setlim;
- setlim.rlim_cur = 1024;
- setlim.rlim_max = RLIM_INFINITY;
- ASSERT_THAT(setrlimit(RLIMIT_FSIZE, &setlim), SyscallSucceeds());
- EXPECT_THAT(ftruncate(test_file_fd_.get(), 1025),
- SyscallFailsWithErrno(EFBIG));
- EXPECT_EQ(sigtimedwait(&new_mask, nullptr, &timelimit), SIGXFSZ);
- ASSERT_THAT(sigprocmask(SIG_UNBLOCK, &new_mask, nullptr), SyscallSucceeds());
-
- // Shrink back down to zero.
- EXPECT_THAT(ftruncate(test_file_fd_.get(), 0), SyscallSucceeds());
- ASSERT_THAT(fstat(test_file_fd_.get(), &buf), SyscallSucceeds());
- EXPECT_EQ(buf.st_size, 0);
-}
-
-// Truncating a file down clears that portion of the file.
-TEST_F(FixtureTruncateTest, FtruncateShrinkGrow) {
- std::vector<char> buf(10, 'a');
- EXPECT_THAT(WriteFd(test_file_fd_.get(), buf.data(), buf.size()),
- SyscallSucceedsWithValue(buf.size()));
-
- // Shrink then regrow the file. This should clear the second half of the file.
- EXPECT_THAT(ftruncate(test_file_fd_.get(), 5), SyscallSucceeds());
- EXPECT_THAT(ftruncate(test_file_fd_.get(), 10), SyscallSucceeds());
-
- EXPECT_THAT(lseek(test_file_fd_.get(), 0, SEEK_SET), SyscallSucceeds());
-
- std::vector<char> buf2(10);
- EXPECT_THAT(ReadFd(test_file_fd_.get(), buf2.data(), buf2.size()),
- SyscallSucceedsWithValue(buf2.size()));
-
- std::vector<char> expect = {'a', 'a', 'a', 'a', 'a',
- '\0', '\0', '\0', '\0', '\0'};
- EXPECT_EQ(expect, buf2);
-}
-
-TEST(TruncateTest, TruncateDir) {
- auto temp_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
- EXPECT_THAT(truncate(temp_dir.path().c_str(), 0),
- SyscallFailsWithErrno(EISDIR));
-}
-
-TEST(TruncateTest, FtruncateDir) {
- auto temp_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
- const FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(temp_dir.path(), O_DIRECTORY | O_RDONLY));
- EXPECT_THAT(ftruncate(fd.get(), 0), SyscallFailsWithErrno(EINVAL));
-}
-
-TEST(TruncateTest, TruncateNonWriteable) {
- // Make sure we don't have CAP_DAC_OVERRIDE, since that allows the user to
- // always override write permissions.
- ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
- auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), absl::string_view(), 0555 /* mode */));
- EXPECT_THAT(truncate(temp_file.path().c_str(), 0),
- SyscallFailsWithErrno(EACCES));
-}
-
-TEST(TruncateTest, FtruncateNonWriteable) {
- auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), absl::string_view(), 0555 /* mode */));
- const FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_RDONLY));
- EXPECT_THAT(ftruncate(fd.get(), 0), SyscallFailsWithErrno(EINVAL));
-}
-
-TEST(TruncateTest, FtruncateWithOpath) {
- SKIP_IF(IsRunningWithVFS1());
- auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), absl::string_view(), 0555 /* mode */));
- const FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_PATH));
- EXPECT_THAT(ftruncate(fd.get(), 0), AnyOf(SyscallFailsWithErrno(EBADF),
- SyscallFailsWithErrno(EINVAL)));
-}
-
-// ftruncate(2) should succeed as long as the file descriptor is writeable,
-// regardless of whether the file permissions allow writing.
-TEST(TruncateTest, FtruncateWithoutWritePermission_NoRandomSave) {
- // Drop capabilities that allow us to override file permissions.
- ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
-
- // The only time we can open a file with flags forbidden by its permissions
- // is when we are creating the file. We cannot re-open with the same flags,
- // so we cannot restore an fd obtained from such an operation.
- const DisableSave ds;
- auto path = NewTempAbsPath();
- const FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(path, O_RDWR | O_CREAT, 0444));
-
- // In goferfs, ftruncate may be converted to a remote truncate operation that
- // unavoidably requires write permission.
- SKIP_IF(IsRunningOnGvisor() && !ASSERT_NO_ERRNO_AND_VALUE(IsTmpfs(path)));
- ASSERT_THAT(ftruncate(fd.get(), 100), SyscallSucceeds());
-}
-
-TEST(TruncateTest, TruncateNonExist) {
- EXPECT_THAT(truncate("/foo/bar", 0), SyscallFailsWithErrno(ENOENT));
-}
-
-TEST(TruncateTest, FtruncateVirtualTmp_NoRandomSave) {
- auto temp_file = NewTempAbsPathInDir("/dev/shm");
- const DisableSave ds; // Incompatible permissions.
- const FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file, O_RDWR | O_CREAT | O_EXCL, 0));
- EXPECT_THAT(ftruncate(fd.get(), 100), SyscallSucceeds());
-}
-
-// NOTE: There are additional truncate(2)/ftruncate(2) tests in mknod.cc
-// which are there to avoid running the tests on a number of different
-// filesystems which may not support mknod.
-
-} // namespace
-
-} // namespace testing
-} // namespace gvisor
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