操作系统课程设计Linux

#include<stdio.h> #include<stdlib.h> #include<string.h> #include"filesys.h" unsigned short currentuser=65535; char *command; struct usergroup MFD; //主目录，所有的用户都在一各组里？？ char block_buf[BLOCKSIZE] ; //内存的块位图数组 char inode_buf [INODENUM] ;//内存中结点位图数组 FILE *fd; //文件类型指针 struct superblock *super; struct userdir UFD; struct linkgroup LGP; char block_buff[BLOCKNUM]; char inode_buff[INODENUM]; FILE *fd1; char * command1; char * command2; char * command3; void print_help() { printf("\n\t\t\t help\n"); printf("\t\t format :creat a new file system\n"); printf("\t\t login :enter filesystem\n"); printf("\t\t logout :logout enter\n "); printf("\t\t adduser :add user \n"); printf("\t\t createfile :create a file\n"); printf("\t\t writefile:write content to file\n"); printf("\t\t readfile :read content from file\n"); printf("\t\t copyfile: copy from one file to another\n"); printf("\t\t showfiles :list files\n"); printf("\t\t listuser :list users\n"); printf("\t\t removefile:delete files\n"); printf("\t\t removeuser:delete user\n"); printf("\t\t quit:exit filesystem\n"); printf("\t\t changepsw:change passward\n"); printf("\t\t refile:rename a file\n"); printf("\t\t createlink:create a link to a file\n"); printf("\t\t showlinks:show all links\n"); printf("\t\t linkfile:link to a file\n"); } int main() { print_help(); int pid; char yn; int loginf=3; fd1=fopen("filesysterm","r");//打开文件filesysterm, 并返回一个关联该文件的流 if(fd1==NULL) { printf("\n Disk has not format!! format now:(Y/N)\n"); scanf("%c",&yn); if(yn=='y'||yn=='Y') { format(); printf("\n ------format completed------\n"); } else exit(0); } else{ printf("\n -------filesystem exist------\n"); printf("\n -------please press enter------\n"); fclose(fd1); } command=(char *)getinput('\n'); free(command); load(); //-----------------------------????????? while(loginf) //只有三次登陆机会 { loginf--; print_help(); //-------------实现选项的循环出现 printf("\n please enter the operation,login first \n"); command=(char *)getinput('\n'); if(!strcmp(command,"login")) {printf("\n please enter your name \n"); command1=(char *)getinput('\n'); printf("\n please enter your passward \n"); command2=(char *)getinput('\n'); currentuser=login(command1,command2); } if(currentuser==65535) {//printf("\n user not exist!\n"); printf("\n you have %d chances to login",loginf ,"\n"); continue; } else if(currentuser==65534) { //printf("\n name or password error\n"); printf("\n you have %d chances to login",loginf ,"\n"); continue; } else {printf("LOGIN SUCCESSFUL!\n"); if(loginf==0) loginf++; break; free(command); } } if(loginf!=0) { while(1) { print_help(); printf("\n Please enter your command: \n"); command=(char *)getinput('\n'); if(!strcmp(command,"login")) { printf("\n Please enter your name \n"); command1=(char *)getinput('\n'); printf("\n Please enter your password\n"); command2=(char *)getinput('\n'); currentuser=login(command1,command2); if(currentuser!=65535) { printf("LOGIN SUCCESSFUL!\n"); continue; } } if(currentuser==65535) { printf("Please login first\n"); } else { if(!strcmp(command,"quit")) {exit(0); } else if (!strcmp(command,"logout")) { pid=logout();//令currentuser=65535 printf("LOGOUT SUCCESSFUL!\n"); } else if(!strcmp(command,"createfile")) { printf("\n Please enter file name :\n"); command1=(char *)getinput('\n'); printf("\n Please enter file format :\n"); command2=(char *)getinput('\n'); int id1 =oct2dec(atoi(command2)); struct inode* pinode=makefile(currentuser,command1,id1); if (pinode==NULL)//如果重名返回NULL { printf("%s The file has already exist!\n",command1); } else {printf("\nThe file is created successful!\n"); } } else if(!strcmp(command,"showfiles")) { show_dir(); } else if(!strcmp(command,"writefile")) { printf("\n Please enter file name\n");//请输入文件名 command1=(char *)getinput('\n'); //****************************** unsigned short inode_num=mapUFDinode(command1); if(inode_num==MAPERR) { printf("\n The file does not eixst\n"); } else { printf("\n please input the context ,# end\n"); char * context=(char *)getinput('#'); if(writefile(context,command1)==NULL) { printf("\n Write fail\n");} else {printf("\n Write successful\n"); } } } else if(!strcmp(command,"readfile")) { printf("\n Please enter file name:\n");//请输入文件名 command1=(char *)getinput('\n'); char *context=(char *)readfile(command1); if(context==NULL) { printf("\n The file does not exist \n");}//文件不存在 else {printf("\n %s\n",context);} } else if(!strcmp(command,"copyfile")) { unsigned short j; printf("\n Please enter name of the source file \n"); command1=(char *)getinput('\n'); printf("\n Please enter name of the distincting file \n"); command2=(char *)getinput('\n'); j=copy(command2,command1); if(j==0) { printf("\n The dsitinct file does not exist\n");//目标文件不存在 } if(j==1) { printf("\n The source file does not eixst\n");//源文件文件不存在 printf("\t\t\t\t 操作命令表\n\n"); printf("\t\t\t printhelp:\t显示帮助\n\n"); printf("\t\t\t format:\t建立一个新的文件系统\n\n"); printf("\t\t\t adduser:\t增加用户\n\n"); printf("\t\t\t createfile :\t建立新文件\n\n"); printf("\t\t\t writefile:\t写文件\n\n"); printf("\t\t\t readfile :\t读文件\n\n"); printf("\t\t\t copyfile :\t复制文件\n\n"); printf("\t\t\t showfiles:\t列出文件\n\n"); printf("\t\t\t listuser:\t列出用户\n\n"); printf("\t\t\t removefile:\t移除文件\n\n"); printf("\t\t\t removeuser:\t移除用户\n\n"); printf("\t\t\t login:\t\t登录文件系统\n\n"); printf("\t\t\t logout:\t注销登录，退出文件系统\n\n"); printf("\t\t\t quit:\t\t退出\n"); } if(j==2) { printf("\n Copy successful!\n");//拷贝成功 } if(j==3) { printf("\n Copy fail\n");//拷贝失败 } } else if(!strcmp(command,"removefile")) { unsigned short i; printf("\n Please enter the name of file\n");//请输入文件名 command1=(char *)getinput('\n'); i=removefile(command1); if(i==0) {printf("\n The file does not exist\n");}//文件不存在 else if(i==1) {printf("\n The file delete successful!\n");}//文件删除成功 else {printf("\n You do not have the right of deleting a file \n");}//权限不对 } else if(!strcmp(command,"adduser")) { printf("\n Please enter the name of user:\n");//请输入用户名 command1=(char *)getinput('\n'); printf("\n Please enter the group of user:\n");//请输入所在组名 command2=(char *)getinput('\n'); printf("\n please enter passward:\n"); command3=(char *)getinput('\n'); int i; i=adduser(command1,command2,command3); if(i==2) {printf("\n You do not have the right of adding a user\n");}//权限不对,只有root用户才能添加新用户 else if(i==1) {printf("\n Add user successful!\n");}//添加成功 else {printf("\n Add