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-rw-r--r--test/syscalls/linux/select.cc168
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diff --git a/test/syscalls/linux/select.cc b/test/syscalls/linux/select.cc
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index 88c010aec..000000000
--- a/test/syscalls/linux/select.cc
+++ /dev/null
@@ -1,168 +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 <fcntl.h>
-#include <sys/resource.h>
-#include <sys/select.h>
-#include <sys/time.h>
-#include <climits>
-#include <csignal>
-#include <cstdio>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest.h"
-#include "absl/time/time.h"
-#include "test/syscalls/linux/base_poll_test.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/multiprocess_util.h"
-#include "test/util/posix_error.h"
-#include "test/util/rlimit_util.h"
-#include "test/util/temp_path.h"
-#include "test/util/test_util.h"
-
-namespace gvisor {
-namespace testing {
-namespace {
-
-class SelectTest : public BasePollTest {
- protected:
- void SetUp() override { BasePollTest::SetUp(); }
- void TearDown() override { BasePollTest::TearDown(); }
-};
-
-// See that when there are no FD sets, select behaves like sleep.
-TEST_F(SelectTest, NullFds) {
- struct timeval timeout = absl::ToTimeval(absl::Milliseconds(10));
- ASSERT_THAT(select(0, nullptr, nullptr, nullptr, &timeout),
- SyscallSucceeds());
- EXPECT_EQ(timeout.tv_sec, 0);
- EXPECT_EQ(timeout.tv_usec, 0);
-
- timeout = absl::ToTimeval(absl::Milliseconds(10));
- ASSERT_THAT(select(1, nullptr, nullptr, nullptr, &timeout),
- SyscallSucceeds());
- EXPECT_EQ(timeout.tv_sec, 0);
- EXPECT_EQ(timeout.tv_usec, 0);
-}
-
-TEST_F(SelectTest, NegativeNfds) {
- EXPECT_THAT(select(-1, nullptr, nullptr, nullptr, nullptr),
- SyscallFailsWithErrno(EINVAL));
- EXPECT_THAT(select(-100000, nullptr, nullptr, nullptr, nullptr),
- SyscallFailsWithErrno(EINVAL));
- EXPECT_THAT(select(INT_MIN, nullptr, nullptr, nullptr, nullptr),
- SyscallFailsWithErrno(EINVAL));
-}
-
-TEST_F(SelectTest, ClosedFds) {
- auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_RDONLY));
-
- // We can't rely on a file descriptor being closed in a multi threaded
- // application so fork to get a clean process.
- EXPECT_THAT(InForkedProcess([&] {
- int fd_num = fd.get();
- fd.reset();
-
- fd_set read_set;
- FD_ZERO(&read_set);
- FD_SET(fd_num, &read_set);
-
- struct timeval timeout =
- absl::ToTimeval(absl::Milliseconds(10));
- TEST_PCHECK(select(fd_num + 1, &read_set, nullptr, nullptr,
- &timeout) != 0);
- TEST_PCHECK(errno == EBADF);
- }),
- IsPosixErrorOkAndHolds(0));
-}
-
-TEST_F(SelectTest, ZeroTimeout) {
- struct timeval timeout = {};
- EXPECT_THAT(select(1, nullptr, nullptr, nullptr, &timeout),
- SyscallSucceeds());
- // Ignore timeout as its value is now undefined.
-}
-
-// If random S/R interrupts the select, SIGALRM may be delivered before select
-// restarts, causing the select to hang forever.
-TEST_F(SelectTest, NoTimeout_NoRandomSave) {
- // When there's no timeout, select may never return so set a timer.
- SetTimer(absl::Milliseconds(100));
- // See that we get interrupted by the timer.
- ASSERT_THAT(select(1, nullptr, nullptr, nullptr, nullptr),
- SyscallFailsWithErrno(EINTR));
- EXPECT_TRUE(TimerFired());
-}
-
-TEST_F(SelectTest, InvalidTimeoutNegative) {
- struct timeval timeout = absl::ToTimeval(absl::Microseconds(-1));
- EXPECT_THAT(select(1, nullptr, nullptr, nullptr, &timeout),
- SyscallFailsWithErrno(EINVAL));
- // Ignore timeout as its value is now undefined.
-}
-
-// Verify that a signal interrupts select.
-//
-// If random S/R interrupts the select, SIGALRM may be delivered before select
-// restarts, causing the select to hang forever.
-TEST_F(SelectTest, InterruptedBySignal_NoRandomSave) {
- absl::Duration duration(absl::Seconds(5));
- struct timeval timeout = absl::ToTimeval(duration);
- SetTimer(absl::Milliseconds(100));
- ASSERT_FALSE(TimerFired());
- ASSERT_THAT(select(1, nullptr, nullptr, nullptr, &timeout),
- SyscallFailsWithErrno(EINTR));
- EXPECT_TRUE(TimerFired());
- // Ignore timeout as its value is now undefined.
-}
-
-TEST_F(SelectTest, IgnoreBitsAboveNfds) {
- // fd_set is a bit array with at least FD_SETSIZE bits. Test that bits
- // corresponding to file descriptors above nfds are ignored.
- fd_set read_set;
- FD_ZERO(&read_set);
- constexpr int kNfds = 1;
- for (int fd = kNfds; fd < FD_SETSIZE; fd++) {
- FD_SET(fd, &read_set);
- }
- // Pass a zero timeout so that select returns immediately.
- struct timeval timeout = {};
- EXPECT_THAT(select(kNfds, &read_set, nullptr, nullptr, &timeout),
- SyscallSucceedsWithValue(0));
-}
-
-// This test illustrates Linux's behavior of 'select' calls passing after
-// setrlimit RLIMIT_NOFILE is called. In particular, versions of sshd rely on
-// this behavior.
-TEST_F(SelectTest, SetrlimitCallNOFILE) {
- fd_set read_set;
- FD_ZERO(&read_set);
- timeval timeout = {};
- const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(
- Open(NewTempAbsPath(), O_RDONLY | O_CREAT, S_IRUSR));
-
- Cleanup reset_rlimit =
- ASSERT_NO_ERRNO_AND_VALUE(ScopedSetSoftRlimit(RLIMIT_NOFILE, 0));
-
- FD_SET(fd.get(), &read_set);
- // this call with zero timeout should return immediately
- EXPECT_THAT(select(fd.get() + 1, &read_set, nullptr, nullptr, &timeout),
- SyscallSucceeds());
-}
-
-} // namespace
-} // namespace testing
-} // namespace gvisor