源码如下：
main(int argc, char **argv){int flowRx_fd, flowTx_fd, flowSt_fd, data_size ;char RX_buf[DATA_BUF_SIZE] , TX_buf[DATA_BUF_SIZE];FILE *flowSt_pin = NULL;if((flowRx_fd = open(FLOW_RX_FILE, O_RDONLY)) == -1){fprintf(stderr, “RX_open: %s\n”,strerror(errno));exit(EXIT_FAILURE);}if((flowTx_fd = open(FLOW_TX_FILE, O_RDONLY)) == -1){fprintf(stderr, “TX_open: %s\n”,strerror(errno));exit(EXIT_FAILURE);}if((flowSt_fd = open(FLOW_STATISTICS, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR)) == -1){fprintf(stderr, “ST_open: %s\n”,strerror(errno));exit(EXIT_FAILURE);}//将文件描述符转换成文件指针flowSt_pin = fdopen(flowSt_fd, “w+”);while(1){bzero(RX_buf,sizeof(RX_buf));bzero(TX_buf,sizeof(TX_buf));if((data_size = read(flowRx_fd,RX_buf,sizeof(RX_buf))) == -1){fprintf(stderr, “read_rx: %s\n”,strerror(errno));}RX_buf[data_size -1 ] = ‘\0’;if((data_size = read(flowTx_fd,TX_buf,sizeof(TX_buf))) == -1){fprintf(stderr, “read_tx: %s\n”,strerror(errno));}TX_buf[data_size -1 ] = ‘\0’;//JOSN格式 {“firstName”:”Brett”,”lastName”:”McLaughlin”,”email”:”aaaa”}fprintf(flowSt_pin,”{\”up_flow\”:\”%s\”,\”down_flow\”:\”%s\”}\n”,RX_buf, TX_buf);fflush(flowSt_pin);lseek(flowRx_fd, 0, SEEK_SET);lseek(flowTx_fd, 0, SEEK_SET);sleep(2);//更改文件大小，保存向文件中写入的数据达到覆盖效果ftruncate(flowSt_fd, 0);}return 0;}
，孝敬父母、疼爱孩子、体贴爱人、善待朋友。
