Колхозим мониторинг ИБП с протоколом Megatec в Zabbix

#include <stdio.h>   /*   / */
#include <string>
#include <iostream>
#include <cstring>

using namespace std;
#include <unistd.h>  /*    UNIX */
#include <fcntl.h>   /*    */
#include <errno.h>   /*    */
#include <termios.h> /*   POSIX- */
#include <sys/types.h>
#include <sys/stat.h>

int fd; /*     */
char buf[512];/*      */
int main (int argc, char* argv[])
 {
    int iIn,iOut;
    string UPSAnswer;
    if (argc>=2)
{
        fd = open(argv[1], O_RDWR | O_NOCTTY | O_NDELAY); /*'open_port()' -    */
        if (fd == -1)   {
           printf("error port\n");
           perror("open_port: Unable to open port - ");   }
     else
        {
         struct termios options; /*   */
         tcgetattr(fd, &options); /*  */

         cfsetispeed(&options, B2400); /*  */
         cfsetospeed(&options, B2400); /*  */

         options.c_cflag &= ~PARENB; /*  */
         options.c_cflag &= ~CSTOPB; /* 2- ,  1 */
         options.c_cflag &= ~CSIZE; /*  */
         options.c_cflag |= CS8; /* 8*/
         tcsetattr(fd, TCSANOW, &options); /*  */
        }

        char Params[64];

        if(argc>=3)
        {
            if (!strcmp(argv[2],"status"))
            {
                iOut = write(fd, "Q1\r", 3);
                usleep(800000);
                if (iOut < 0)  fputs("write() of 4 bytes failed!\n", stderr);
                iIn=read(fd,buf,250); /*    */

                 strncpy(Params,&buf[38],11);
                 Params[46]=0;
            }
            else if (!strcmp(argv[2],"help"))
            {
                printf (" .   !\r\n");
            }
            else if (!strcmp(argv[2],"name"))
            {
                iOut = write(fd, "I\r", 3);
                usleep(800000);
                if (iOut < 0)  fputs("write() of 4 bytes failed!\n", stderr);
                iIn=read(fd,buf,250); /*    */
                strncpy(Params,&buf[0],60);

            }
            else if (!strcmp(argv[2],"stat2"))
            {
                iOut = write(fd, "F\r", 3);
                usleep(800000);
                if (iOut < 0)  fputs("write() of 4 bytes failed!\n", stderr);
                iIn=read(fd,buf,250); /*    */
                strncpy(Params,&buf[1],60);
         Params[20]=0;
            }
            else
            {
                printf ("? \r\n");
            }
        }
        else
        {
           /*    Q1 */
                usleep(1800);
                iIn=read(fd,buf,250);
                usleep(1800);
           iOut = write(fd, "Q1\r", 3);
           usleep(800000);
           if (iOut < 0)  fputs("write() of 4 bytes failed!\n", stderr);
           iIn=read(fd,buf,250); /*    */

           strncpy(Params,&buf[1],36);
           Params[36]=' ';
        }
    close(fd);
    printf("%s\r\n",Params);
}
else
printf("Usage %s /dev/ttySx", argv[0]);

}