filesys.h

操作系统课程设计

#include <stdio.h>

#define BLOCKSIZ    512
#define SYSOPENFILE 40
#define DIRNUM      128
#define DIRSIZ      14
#define PWDSIZ      12
#define PWDNUM      32
#define NOFILE      20
#define NADDR       10
#define NHINO       128
#define USERNUM     10
#define DINODESIZ   32
#define DINODEBLK   32
#define FILEBLK     512
#define NICFREE     50
#define NICINOD     50
#define DINODESTART 2*BLOCKSIZ
#define DATASTART   (2+DINODEBLK)*BLOCKSIZ
#define DIEMPTY     00000
#define DIFILE      01000
#define DIDIR       02000
#define UDIREAD     00001
#define UDIWRITE    00002
#define UDIEXICUTE  00004
#define GDIREAD     00010
#define GDIWRITE    00020
#define GDIEXICUTE  00040
#define ODIREAD     00100
#define ODIWRITE    00200
#define ODIEXICUTE  00400
#define READ        1
#define WRITE       2
#define EXICUTE     3
#define DEFAULTMODE 00777
#define IUPDATE     00002
#define SUPDATE     00001
#define FREAD       00001
#define FWRITE      00002
#define FAPPEND     00004
#define DISKFULL    65535
#define SEEK_SET    0

#define BLOCKTABLE DATASTART+BLOCKSIZ*511

struct inode{
	     struct inode *i_forw;
	     struct inode *i_back;
	     char i_flag;
	     unsigned int i_ino;
	     unsigned int i_count;
	     unsigned short di_number;
	     unsigned short di_mode;
	     unsigned short di_uid;
	     unsigned short di_gid;
	     unsigned long di_size; //~~~~~edited
	     unsigned int di_addr[NADDR];
	     };

struct dinode{
	     unsigned short di_number;
	     unsigned short di_mode;
	     unsigned short di_uid;
	     unsigned short di_gid;
	     unsigned long di_size;
	     unsigned int di_addr[NADDR];
	     };

struct direct{
		char d_name[DIRSIZ];
		unsigned short int d_ino; //~~~~~edited
		};

struct filsys{
		unsigned short s_isize;
		unsigned long s_fsize;
//		unsigned int s_nfree;
//		unsigned short s_pfree;
//		unsigned int s_free[NICFREE];
		unsigned int s_ninode;
		unsigned short s_pinode;
		unsigned int s_inode[NICINOD];
		unsigned int s_rinode;
		char s_fmod;
		};

struct pwd{
		unsigned short p_uid;
		unsigned short p_gid;
		char password[PWDSIZ];
		};

struct dir{
		struct direct direct[DIRNUM];
		int size;
		};

struct hinode{
		struct inode *i_forw;
		};

struct file{
		char f_flag;
		unsigned int f_count;
		struct inode *f_inode;
		unsigned long f_off;
		};

struct user{
		unsigned short u_default_mode;
		unsigned short u_uid;
		unsigned short u_gid;
		unsigned short u_ofile[NOFILE];
		};

extern struct hinode hinode[NHINO];
extern struct dir dir;
extern struct file sys_ofile[SYSOPENFILE];
extern struct filsys filsys;
extern struct pwd pwd[PWDNUM];
extern struct user user[USERNUM];
extern        FILE *fd;
extern struct inode *cur_path_inode;
extern int    user_id,flag;

extern char cpath[512]; //~~~~edited

extern char buff[BLOCKSIZ];////////////////////
extern struct inode *iget();
extern void      iput();
extern unsigned int balloc();
extern        bfree();
extern struct inode * ialloc();
extern        ifree();
extern unsigned int namei();
extern unsigned short iname();
extern unsigned int access();
extern        _dir();
extern        mkdir();
extern        chdir();
extern unsigned short aopen();
extern        creat();
extern unsigned int read();
extern unsigned int write();
extern unsigned int getfilesize();//~~~~edited
extern int    login();
extern        logout();
extern        install();
extern        format();
extern        close();
extern        halt();
extern        delete();