79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
// Copyright 2018 The gVisor Authors.
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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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#include <sys/wait.h>
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#include <unistd.h>
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#include "gtest/gtest.h"
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#include "absl/time/time.h"
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#include "test/util/file_descriptor.h"
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#include "test/util/test_util.h"
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#include "test/util/time_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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void TestExit(int code) {
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pid_t pid = fork();
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if (pid == 0) {
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_exit(code);
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}
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ASSERT_THAT(pid, SyscallSucceeds());
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int status;
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EXPECT_THAT(RetryEINTR(waitpid)(pid, &status, 0), SyscallSucceeds());
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EXPECT_TRUE(WIFEXITED(status) && WEXITSTATUS(status) == code) << status;
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}
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TEST(ExitTest, Success) { TestExit(0); }
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TEST(ExitTest, Failure) { TestExit(1); }
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// This test ensures that a process's file descriptors are closed when it calls
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// exit(). In order to test this, the parent tries to read from a pipe whose
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// write end is held by the child. While the read is blocking, the child exits,
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// which should cause the parent to read 0 bytes due to EOF.
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TEST(ExitTest, CloseFds) {
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int pipe_fds[2];
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ASSERT_THAT(pipe(pipe_fds), SyscallSucceeds());
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FileDescriptor read_fd(pipe_fds[0]);
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FileDescriptor write_fd(pipe_fds[1]);
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pid_t pid = fork();
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if (pid == 0) {
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read_fd.reset();
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SleepSafe(absl::Seconds(10));
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_exit(0);
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}
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EXPECT_THAT(pid, SyscallSucceeds());
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write_fd.reset();
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char buf[10];
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EXPECT_THAT(ReadFd(read_fd.get(), buf, sizeof(buf)),
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SyscallSucceedsWithValue(0));
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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