/*
 * 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"
#include "signal.h"
#include "fcntl.h"
#include "sys/shm.h"

static int TestPipeMultiProcess()
{
    int pipefd[2]; // 2, array subscript
    pid_t pid;
    int retValue = -1;
    retValue = pipe(pipefd);
    ICUNIT_ASSERT_EQUAL(retValue, 0, retValue);

    int *readFd = &pipefd[0];
    int *writeFd = &pipefd[1];
    char readbuffer[100] = {0};
    int status, ret;
    int totalNum = 3;
    int *sharedflag = NULL;
    int shmid;

    int flag = fcntl(*readFd, F_GETFL);
    fcntl(*readFd, F_SETFL, flag | O_NONBLOCK);
    shmid = shmget((key_t)IPC_PRIVATE, sizeof(int), 0666 | IPC_CREAT); // 0666 the authority of the shm
    ICUNIT_ASSERT_NOT_EQUAL(shmid, -1, shmid);
    sharedflag = (int *)shmat(shmid, NULL, 0);
    *sharedflag = 0;

    pid = fork();
    if (pid == -1) {
        printf("Fork Error!\n");
        return -1;
    } else if (pid == 0) {
        sharedflag = (int *)shmat(shmid, NULL, 0);
        close(pipefd[0]);
        for (int i = 0; i < totalNum; i++) {
            errno = 0;
            char sentence1[15] = "Hello World";
            char a[2] = {0};
            (void)sprintf_s(a, sizeof(a), "%d", i);
            strcat(sentence1, a);
            int ret = write(*writeFd, sentence1, strlen(sentence1) + 1);
            ICUNIT_ASSERT_EQUAL(ret, strlen(sentence1) + 1, ret);
            usleep(10000); // 10000, Used to calculate the delay time.
        }
        *sharedflag = 1;
        ret = close(pipefd[1]);
        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
        exit(0);
    } else {
        close(pipefd[1]);
        // waitting for the sub process has written the sentence first
        while (*sharedflag != 1) {
            usleep(1);
        }
        for (int i = 0; i < totalNum; i++) {
            printf("read\n");
            char sentence1[15] = "Hello World";
            char a[2] = {0};
            (void)sprintf_s(a, sizeof(a), "%d", i);
            strcat(sentence1, a);
            memset(readbuffer, 0, sizeof(readbuffer));
            retValue = read(*readFd, readbuffer, strlen(sentence1) + 1);
            printf("Receive %d bytes data : %s, errno : %d\n", retValue, readbuffer, errno);
            ICUNIT_ASSERT_SIZE_STRING_EQUAL(readbuffer, sentence1, strlen(sentence1), errno);
        }
    }
    ret = waitpid(pid, &status, 0);
    ICUNIT_ASSERT_EQUAL(ret, pid, ret);
    ret = close(pipefd[0]);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    return 0;
}


void ItPosixPipe002(void)
{
    TEST_ADD_CASE(__FUNCTION__, TestPipeMultiProcess, TEST_POSIX, TEST_MEM, TEST_LEVEL0, TEST_FUNCTION);
}
