ejectdevice.c

在linux对cdrom直接使用ioctl控制cdrom的仓门

#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <stdlib.h>

#define	MAX_DEV 4
#define	NAM_LEN	30

char    devname[MAX_DEV][NAM_LEN];

void process_eject(char *devname)
{
	system(devname);
}

int main()
{
	int	i;
	int	tid[MAX_DEV];
	pthread_t	pthread_id[MAX_DEV];

	for(i=0;i<MAX_DEV;i++)
		sprintf(devname[i],"eject /dev/sr%d",i);
/*
	for(i=0;i<MAX_DEV;i++){
		printf("OUT devicenum is /dev/sr%d\n",i);
		system(devname[i]);
	}

*/
	for(i=0;i<MAX_DEV;i++){
printf("OUT devicenum is /dev/sr%d\n",i);
		tid[i] = pthread_create(&pthread_id[i],NULL,(void *)process_eject,(char *)&devname[i]);
		if(tid[i] < 0){
			printf("Error on create process_eject pthread!\n");
			continue;
		}
	}
	for(i=0;i<MAX_DEV;i++)
		pthread_join(pthread_id[i],NULL);

	for(i=0;i<MAX_DEV;i++)
		sprintf(devname[i],"eject -t /dev/sr%d",i);

	for(i=0;i<MAX_DEV;i++){
printf("IN devicenum is /dev/sr%d\n",i);
                tid[i] = pthread_create(&pthread_id[i],NULL,(void *)process_eject,(char *)&devname[i]);
                if(tid[i] < 0){
                        printf("Error on create process_eject pthread!\n");
                        continue;
                }
        }
	for(i=0;i<MAX_DEV;i++)
                pthread_join(pthread_id[i],NULL);
}