filesys.h

操作系统简单的登入程序

#define SYSOPENFILE 40 
//simulate disk format
#define BLOCKSIZE 1024

#define BLOCKNUM 1024

#define SUPBLOCKSIZE  1

#define INODETABLESIZE  (sizeof(struct inode))

#define INODENUMBER 1024

#define INODEBITMAPSIZE 1

#define BLOCKBITMAPSIZE 1

#define DIRBLOCK 2

#define	DATABLOCKSTART (SUPBLOCKSIZE+INODETABLESIZE+INODEBITMAPSIZE+BLOCKBITMAPSIZE)

#define DIRSIZE 14	    
#define PWDSIZE 12	    
#define PWDNUM 32	    
#define NOFILE 20 	  
#define NADDR 10  		


#define USERNUM 10
#define DIRNUM 32

/*filesys*/
#define DINODESTART 2*BLOCKSIZE
#define DATASTART (2+DINODEBLK)*BLOCKSIZE


#define DIEMPTY 00000
#define DIFILE    01000
#define DIDIR     02000


#define UDIREAD 00001
#define UDIWRIRE 00002
#define UDIEXECUTE 00004
#define GDIREAD  00010
#define GDIWRITE 00020
#define GDIEXECUTE 00040
#define  ODIREAD  00100
#define  ODIWRITE  00200
#define  ODIEXECUTE 00400

#define DEFAULTMODE  00077
#define ROOTMODE  00007

//
#define READ 1
#define WRITE 2
#define EXECUTE 3


/*i_flag;*/
#define IUPDATE   00002
#define INVARABLE 00000
/*s_fmod*/
#define SUPDATE		00002
#define SINVARABLE  00000
/*f_flag*/
#define FREAD 00001
#define FWRITE  00002
#define FAPPEND 00004
#define DISKFULL 65535
#define DISKSUCCESS 65534
#define SEEK_SET 0
#define MAPERR 65535
struct dir
{
	char name[DIRSIZE];
	unsigned short d_ino;
	unsigned short filetype;

};

struct dirs
{	
	struct dir direct[DIRNUM];
	unsigned short size;

};

struct inode 
{
	//struct inode  *i_forw;
	//struct inode  *i_back;
	char i_flag;					//
	unsigned short i_ino;				//
	unsigned short n_refer;
	    //
	unsigned short di_mode;			//inode type (file.....
	char di_uid[8];			//
	char di_gid[8];			//
	unsigned short di_size;			//
	unsigned short di_addr[NADDR];	//

};

struct user
{
	char u_uid[8];				//
	char u_gid[8];              //
	unsigned short  u_ofile[NOFILE];	//
	unsigned short  u_nf;			    //
	char password[PWDSIZE];
	unsigned short n_inode;
};


struct filesys
{
	unsigned short s_isize;  //
	unsigned long s_fsize;  //

	unsigned int s_nfree;   //free number
	unsigned int s_pfree;   //free pointer
	char* s_free;   //block map

	unsigned int s_ninode;    //inode number
	unsigned short s_pinode;  //inode pointer
	char* s_inode;	  //inode map
	unsigned int s_rinode;    //

	//char s_fmod;	
	//
};


struct usergroup
{	
	struct user users[USERNUM];
	unsigned short size;//
};
struct file
{
	char f_flag;              //
	unsigned int f_count;     //
	struct inode *f_inode; //
	unsigned long f_off; //
};
extern char block_buf[BLOCKSIZE];  

extern char inode_buf[BLOCKSIZE];            

extern struct filesys* super; 

extern unsigned short currentuser;

extern FILE* fd;

extern struct  usergroup directory_1;

extern struct dirs directory_2;

extern char command1[100];

extern char command2[100];

extern char command3[100];