1 /* Copyright 2016 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 16 #include <sys/wait.h> 17 18 #include "tensorflow/core/lib/core/status_test_util.h" 19 #include "tensorflow/core/platform/subprocess.h" 20 #include "tensorflow/core/platform/test.h" 21 22 namespace tensorflow { 23 24 class SubProcessTest : public ::testing::Test {}; 25 26 TEST_F(SubProcessTest, NoOutputNoComm) { 27 tensorflow::SubProcess proc; 28 proc.SetProgram("/bin/cat", {"cat", "/dev/null"}); 29 EXPECT_TRUE(proc.Start()); 30 EXPECT_TRUE(proc.Wait()); 31 } 32 33 TEST_F(SubProcessTest, NoOutput) { 34 tensorflow::SubProcess proc; 35 proc.SetProgram("/bin/cat", {"cat", "/dev/null"}); 36 proc.SetChannelAction(CHAN_STDOUT, ACTION_PIPE); 37 proc.SetChannelAction(CHAN_STDERR, ACTION_PIPE); 38 EXPECT_TRUE(proc.Start()); 39 40 string out, err; 41 int status = proc.Communicate(nullptr, &out, &err); 42 EXPECT_TRUE(WIFEXITED(status)); 43 EXPECT_EQ(0, WEXITSTATUS(status)); 44 EXPECT_EQ("", out); 45 EXPECT_EQ("", err); 46 } 47 48 TEST_F(SubProcessTest, Stdout) { 49 tensorflow::SubProcess proc; 50 proc.SetProgram("/bin/echo", {"echo", "-n", "hello world"}); 51 proc.SetChannelAction(CHAN_STDOUT, ACTION_PIPE); 52 proc.SetChannelAction(CHAN_STDERR, ACTION_PIPE); 53 EXPECT_TRUE(proc.Start()); 54 55 string out, err; 56 int status = proc.Communicate(nullptr, &out, &err); 57 EXPECT_TRUE(WIFEXITED(status)); 58 EXPECT_EQ(0, WEXITSTATUS(status)); 59 EXPECT_EQ("hello world", out); 60 EXPECT_EQ("", err); 61 } 62 63 TEST_F(SubProcessTest, StdoutIgnored) { 64 tensorflow::SubProcess proc; 65 proc.SetProgram("/bin/echo", {"echo", "-n", "hello world"}); 66 proc.SetChannelAction(CHAN_STDOUT, ACTION_PIPE); 67 proc.SetChannelAction(CHAN_STDERR, ACTION_PIPE); 68 EXPECT_TRUE(proc.Start()); 69 70 int status = proc.Communicate(nullptr, nullptr, nullptr); 71 EXPECT_TRUE(WIFEXITED(status)); 72 EXPECT_EQ(0, WEXITSTATUS(status)); 73 } 74 75 TEST_F(SubProcessTest, Stderr) { 76 tensorflow::SubProcess proc; 77 proc.SetProgram("/bin/cat", {"cat", "/file_does_not_exist"}); 78 proc.SetChannelAction(CHAN_STDOUT, ACTION_PIPE); 79 proc.SetChannelAction(CHAN_STDERR, ACTION_PIPE); 80 EXPECT_TRUE(proc.Start()); 81 82 string out, err; 83 int status = proc.Communicate(nullptr, &out, &err); 84 EXPECT_TRUE(WIFEXITED(status)); 85 EXPECT_EQ(1, WEXITSTATUS(status)); 86 EXPECT_EQ("", out); 87 EXPECT_NE(string::npos, err.find("/file_does_not_exist")); 88 } 89 90 TEST_F(SubProcessTest, StderrIgnored) { 91 tensorflow::SubProcess proc; 92 proc.SetProgram("/bin/cat", {"cat", "/file_does_not_exist"}); 93 proc.SetChannelAction(CHAN_STDOUT, ACTION_PIPE); 94 proc.SetChannelAction(CHAN_STDERR, ACTION_PIPE); 95 EXPECT_TRUE(proc.Start()); 96 97 int status = proc.Communicate(nullptr, nullptr, nullptr); 98 EXPECT_TRUE(WIFEXITED(status)); 99 EXPECT_EQ(1, WEXITSTATUS(status)); 100 } 101 102 TEST_F(SubProcessTest, Stdin) { 103 tensorflow::SubProcess proc; 104 proc.SetProgram("/usr/bin/wc", {"wc", "-l"}); 105 proc.SetChannelAction(CHAN_STDIN, ACTION_PIPE); 106 EXPECT_TRUE(proc.Start()); 107 108 string in = "foobar\nbarfoo\nhaha\n"; 109 int status = proc.Communicate(&in, nullptr, nullptr); 110 EXPECT_TRUE(WIFEXITED(status)); 111 EXPECT_EQ(0, WEXITSTATUS(status)); 112 } 113 114 TEST_F(SubProcessTest, StdinStdout) { 115 tensorflow::SubProcess proc; 116 proc.SetProgram("/usr/bin/wc", {"wc", "-l"}); 117 proc.SetChannelAction(CHAN_STDIN, ACTION_PIPE); 118 proc.SetChannelAction(CHAN_STDOUT, ACTION_PIPE); 119 EXPECT_TRUE(proc.Start()); 120 121 string in = "foobar\nbarfoo\nhaha\n"; 122 string out; 123 int status = proc.Communicate(&in, &out, nullptr); 124 EXPECT_TRUE(WIFEXITED(status)); 125 EXPECT_EQ(0, WEXITSTATUS(status)); 126 int count = stoi(out); 127 EXPECT_EQ(3, count); 128 } 129 130 TEST_F(SubProcessTest, StdinChildExit) { 131 tensorflow::SubProcess proc; 132 proc.SetProgram("/bin/sleep", {"sleep", "0"}); 133 proc.SetChannelAction(CHAN_STDIN, ACTION_PIPE); 134 EXPECT_TRUE(proc.Start()); 135 136 // Verify that the parent handles the child exiting immediately as the 137 // parent is trying to write a large string to the child's stdin. 138 string in; 139 in.reserve(1000000); 140 for (int i = 0; i < 100000; i++) { 141 in += "hello xyz\n"; 142 } 143 144 int status = proc.Communicate(&in, nullptr, nullptr); 145 EXPECT_TRUE(WIFEXITED(status)); 146 EXPECT_EQ(0, WEXITSTATUS(status)); 147 } 148 149 TEST_F(SubProcessTest, StdinStdoutOverlap) { 150 tensorflow::SubProcess proc; 151 proc.SetProgram("/bin/cat", {"cat"}); 152 proc.SetChannelAction(CHAN_STDIN, ACTION_PIPE); 153 proc.SetChannelAction(CHAN_STDOUT, ACTION_PIPE); 154 EXPECT_TRUE(proc.Start()); 155 156 // Verify that the parent handles multiplexed reading/writing to the child 157 // process. The string is large enough to exceed the buffering of the pipes. 158 string in; 159 in.reserve(1000000); 160 for (int i = 0; i < 100000; i++) { 161 in += "hello xyz\n"; 162 } 163 164 string out; 165 int status = proc.Communicate(&in, &out, nullptr); 166 EXPECT_TRUE(WIFEXITED(status)); 167 EXPECT_EQ(0, WEXITSTATUS(status)); 168 EXPECT_EQ(in, out); 169 } 170 171 TEST_F(SubProcessTest, KillProc) { 172 tensorflow::SubProcess proc; 173 proc.SetProgram("/bin/cat", {"cat"}); 174 proc.SetChannelAction(CHAN_STDIN, ACTION_PIPE); 175 proc.SetChannelAction(CHAN_STDOUT, ACTION_PIPE); 176 EXPECT_TRUE(proc.Start()); 177 178 EXPECT_TRUE(proc.Kill(SIGKILL)); 179 EXPECT_TRUE(proc.Wait()); 180 181 EXPECT_FALSE(proc.Kill(SIGKILL)); 182 } 183 184 } // namespace tensorflow 185
