text: /*
   * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
   * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this list of
   * conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice, this list
   * of conditions and the following disclaimer in the documentation and/or other materials
   * provided with the distribution.
   *
   * 3. Neither the name of the copyright holder nor the names of its contributors may be used
   * to endorse or promote products derived from this software without specific prior written
   * permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  #include "it_test_signal.h"
  
  
  static const int TAR_STR_LEN = 12;
  
  static UINT32 Testcase(VOID)
  {
      int pipeFd[2], ret, spid; // 2, pipe return 2 file descripter
      char buffer[20];          // 20, target buffer size
      ret = pipe(pipeFd);
      ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT1);
      spid = fork();
      ICUNIT_GOTO_NOT_EQUAL(spid, -1, spid, EXIT1);
      if (spid == 0) {
          close(pipeFd[0]);
          ret = write(pipeFd[1], "hello world", TAR_STR_LEN);
          printf("write first status: %d\n", ret);
          if (ret != TAR_STR_LEN) {
              exit(11); // 11, the value of son process unexpect exit, convenient to debug
          }
          close(pipeFd[1]);
          exit(RED_FLAG);
      }
      close(pipeFd[1]);
      sleep(2); // 2, sleep 2 second
      ret = read(pipeFd[0], buffer, TAR_STR_LEN);
      ICUNIT_GOTO_EQUAL(ret, TAR_STR_LEN, ret, EXIT);
      ret = strcmp(buffer, "hello world");
      ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT);
      printf("read pipe success: %s\n", buffer);
      wait(&ret);
      printf("son return status: %d\n", WEXITSTATUS(ret));
      ICUNIT_GOTO_EQUAL(WEXITSTATUS(ret), RED_FLAG, WEXITSTATUS(ret), EXIT);
      printf("pipe ok\n");
      close(pipeFd[0]);
      return LOS_OK;
  EXIT:
      close(pipeFd[0]);
  EXIT1:
      return LOS_NOK;
  }
  
  VOID ItIpcPipe003(void)
  {
      TEST_ADD_CASE(__FUNCTION__, Testcase, TEST_LIB, TEST_LIBC, TEST_LEVEL1, TEST_FUNCTION);
  }
  