| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 <vector> |
| #include <string> |
| |
| #include <gtest/gtest.h> |
| #include "kudu/util/subprocess.h" |
| #include "kudu/util/test_util.h" |
| |
| using std::string; |
| using std::vector; |
| |
| namespace kudu { |
| |
| class SubprocessTest : public KuduTest {}; |
| |
| TEST_F(SubprocessTest, TestSimplePipe) { |
| vector<string> argv; |
| argv.push_back("tr"); |
| argv.push_back("a-z"); |
| argv.push_back("A-Z"); |
| Subprocess p("/usr/bin/tr", argv); |
| p.ShareParentStdout(false); |
| ASSERT_OK(p.Start()); |
| |
| FILE* out = fdopen(p.ReleaseChildStdinFd(), "w"); |
| PCHECK(out); |
| FILE* in = fdopen(p.from_child_stdout_fd(), "r"); |
| PCHECK(in); |
| |
| fprintf(out, "hello world\n"); |
| // We have to close 'out' or else tr won't write any output, since |
| // it enters a buffered mode if it detects that its input is a FIFO. |
| fclose(out); |
| |
| char buf[1024]; |
| ASSERT_EQ(buf, fgets(buf, sizeof(buf), in)); |
| ASSERT_STREQ("HELLO WORLD\n", &buf[0]); |
| |
| int wait_status = 0; |
| ASSERT_OK(p.Wait(&wait_status)); |
| ASSERT_TRUE(WIFEXITED(wait_status)); |
| ASSERT_EQ(0, WEXITSTATUS(wait_status)); |
| } |
| |
| TEST_F(SubprocessTest, TestErrPipe) { |
| vector<string> argv; |
| argv.push_back("tee"); |
| argv.push_back("/dev/stderr"); |
| Subprocess p("/usr/bin/tee", argv); |
| p.ShareParentStderr(false); |
| ASSERT_OK(p.Start()); |
| |
| FILE* out = fdopen(p.ReleaseChildStdinFd(), "w"); |
| PCHECK(out); |
| |
| fprintf(out, "Hello, World\n"); |
| fclose(out); // same reasoning as above, flush to prevent tee buffering |
| |
| FILE* in = fdopen(p.from_child_stderr_fd(), "r"); |
| PCHECK(in); |
| |
| char buf[1024]; |
| ASSERT_EQ(buf, fgets(buf, sizeof(buf), in)); |
| ASSERT_STREQ("Hello, World\n", &buf[0]); |
| |
| int wait_status = 0; |
| ASSERT_OK(p.Wait(&wait_status)); |
| ASSERT_TRUE(WIFEXITED(wait_status)); |
| ASSERT_EQ(0, WEXITSTATUS(wait_status)); |
| } |
| |
| TEST_F(SubprocessTest, TestKill) { |
| vector<string> argv; |
| argv.push_back("cat"); |
| Subprocess p("/bin/cat", argv); |
| ASSERT_OK(p.Start()); |
| |
| ASSERT_OK(p.Kill(SIGKILL)); |
| |
| int wait_status = 0; |
| ASSERT_OK(p.Wait(&wait_status)); |
| ASSERT_EQ(SIGKILL, WTERMSIG(wait_status)); |
| |
| // Test that calling Wait() a second time returns the same |
| // cached value instead of trying to wait on some other process |
| // that was assigned the same pid. |
| wait_status = 0; |
| ASSERT_OK(p.Wait(&wait_status)); |
| ASSERT_EQ(SIGKILL, WTERMSIG(wait_status)); |
| } |
| |
| } // namespace kudu |