check_mstate.h~

linux下的人机对话编程

void sys_check()
{
   /* attach parent's shared memory */
      	ap=(struct area *)shmat(shmid, 0, 0);
	int flag_A=0,flag_B=0;
	char start[10]="START";
	char stop[10]="STOP";
while(1)
	{
        /* set semaphore */
        buf_sem.sem_op=-1;
        semop(semid, (struct sembuf *) &buf_sem, 1);
//M machine check
        if(Mstate_check()==0)
                {
                ap->Mstate_gl=0;
                ap->Mhost_name_gl="127.0.0.1";
                //change the lpudated_log reboot M
                //update state_file
                exit(EXIT_FAILURE);
                }
        else
                {
                ap->Mstate_gl=1;
                ap->Mhost_name_gl="192.168.1.1";
                }
//further check for Main_cpu Main_hub
        if((ap->Astate_gl==1)&&(ap->Bstate_gl==1))
                {
		ap->flag_sys_check=1;
                ap->Sys_main_cpu_gl=1;
                ap->Sys_main_hub_gl=1;
                }
        else if((ap->Astate_gl==1)&&(ap->Bstate_gl==0))
                {
                ap->Sys_main_cpu_gl=1;
 		ap->Sys_main_hub_gl=1;
		ap->flag_sys_check=2;
                }
        else if((ap->Astate_gl==0)&&(ap->Bstate_gl==1))
                {
                ap->Sys_main_cpu_gl=2;
                ap->Sys_main_hub_gl=1;
		ap->flag_sys_check=3;
                }
        else    {
		ap->flag_sys_check=4;
		ap->Sys_main_cpu_gl=0;
                //Sys_main_hub_gl=2;
                }
//check the start which machine 
/*	if(ap->Sys_main_cpu_gl==1)
		{
		if(flag_B==0)
			{
			if(flag_A==0)
				{
				sendto_QT("192.168.1.3",start,strlen(start));//Astart 8020,8030
				flag_A=1;
				}
			}
		else
			{
			sendto_QT("192.168.1.5",stop,strlen(stop));//kill B
			flag_B=0;
			sendto_QT("192.168.1.3",start,strlen(start));//Astart
			flag_A=1;
			}
		}
	else if(ap->Sys_main_cpu_gl==2)
		{
		if(flag_A==0)
			{
			if(flag_B==0)
				{
				sendto_QT("192.168.1.5",start,strlen(start));//Bstart
				flag_B=1;
				}
			}
		else
			{
			//Aalready dead
			flag_A=0;
			sendto_QT("192.168.1.5",start,strlen(start));//Bstart
			flag_B=1;
			}
		}


	else
		{}
*/
/*
//further check for host_name
        if(Sys_main_hub_gl==2)
                {
                Ahost_name_gl="192.168.1.4";
                Bhost_name_gl="192.168.1.6";
                }*/
//get the check detail infomation
	/* clear semaphore */
        buf_sem.sem_op=1;
        semop(semid, (struct sembuf *) &buf_sem, 1);
	sleep(1);
	}
}//sys_check