cmd.cpp

文件fat系统的实现在内存中的一种模拟方式

#include "precomp.h"

int main()
{
	InitDisk(); //初始化虚拟磁盘空间

	char filename[8];
	char filecontent[176];//文件内容不能超过176 B，为什么？看看FAT表
	char command[10];
	int filesize = 0;

	int err_no = 0;

	while(1)
	{
		printf("my filesys>"); //命令提示行
		scanf("%s",command);
		
		if (!strcmp(command,"mkfile")) //创建文件命令，需要用户提供文件名
		{
			//printf("\ninput file name(<8 chars):");
			scanf("%s",filename);
			//printf("\nReady to create file. Please input file content end with ENTER\n");
			scanf("%s",filecontent);
			filesize = strlen(filecontent);
			
			if((err_no = CreateFile(filename,filecontent,filesize)) == 0)
			{
				printf("File created ! \n");
			}
			else
			{
				printf("Create failed! err_no=%d\n",err_no);
			}
		}
		else if (!strcmp(command,"dir")) //列目录命令
		{
			ListFile();
		}
		else if(!strcmp(command,"type")) //显示文件内容命令
		{
			scanf("%s",filename);
			if (displayFile(filename) != 0 )
				printf("can't find the file you given!\n");
		}
		else if(!strcmp(command,"del")) //删除文件命令
		{
			scanf("%s",filename);
			if (deleteFile(filename) != 0 )
				printf("can't find the file you given!\n");
		}
		else if (!strcmp(command,"quit")) //退出本系统命令
		{
			break;
		}
		else
		{
			printf("Unknown command!\n");
		}		
		
	}

	return 0;
}