一个操作系统的课程设计

#define MAXNAME 25 /*the largest length of mfdname,ufdname,filename*/ #define MAXCHILD 50 /*the largest child*/ #define MAX (MAXCHILD*MAXCHILD) /*the size of fpaddrno*/ typedef struct /*the structure of OSFILE*/ {int fpaddr; /*file physical address*/ int flength; /*file length*/ int fmode; /*file mode:0-Read Only;1-Write Only;2-Read and Write(default);*/ char fname[MAXNAME]; /*file name*/ } OSFILE; typedef struct /*the structure of OSUFD*/ {char ufdname[MAXNAME]; /*ufd name*/ OSFILE ufdfile[MAXCHILD]; /*ufd own file*/ }OSUFD; typedef struct /*the structure of OSUFD'LOGIN*/ {char ufdname[MAXNAME]; /*ufd name*/ char ufdpword[8]; /*ufd password*/ } OSUFD_LOGIN; typedef struct /*file open mode*/ {int ifopen; /*ifopen:0-close,1-open*/ int openmode; /*0-read only,1-write only,2-read and write,3-initial*/ }OSUFD_OPENMODE; void LoginF(); /*LOGIN FileSystem*/ void DirF(); /*Dir FileSystem*/ void CdF(); /*Change Dir*/ void CreateF(); /*Create File*/ void DeleteF(); /*Delete File*/ void ModifyFM(); /*Modify FileMode*/ void OpenF(); /*Open File*/ void CloseF(); /*Close File*/ void ReadF(); /*Read File*/ void WriteF(); /*Write File*/ void QuitF(); /*Quit FileSystem*/ void help();