📄 文件系统.cpp
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{
int file_mode;
char file_name[MAXNAME]; //用于保存文件名
char str[MAXNAME];
cout<<"input file name:";
cin>>file_name; //读入文件名
int i = existFile(file_name);
while(i==-1)
{
cout<<"The file is not existed."<<endl<<endl;
cout<<"input file name:";
cin>>file_name; //读入文件名
i = existFile(file_name);
}
int j = existDirname(dirname);
if(openflag[j][i].openflag==1)
cout<<"The file has been opened."<<endl;
else
{
if(userfile[j]->userAllFile[i].fmode==3)
cout<<"Open failed.\nThe file's mode is protect."<<endl;
else
{
cout<<"0-read only, 1-write only, 2-read and write)"<<endl;
cout<<"Input the open mode:";
cin>>file_mode;
while(file_mode<0 || file_mode>2)
{
cout<<"Open failed.\nThe open mode is not exist."<<endl<<endl;
cout<<"0-read onlu, 1-write only, 2-read and write)"<<endl;
cout<<"Input the open mode:";
cin>>file_mode;
}
if(file_mode==0)
{
strcpy(str,"read only"); //复制模式到字符串
if(userfile[j]->userAllFile[i].fmode==0||userfile[j]->userAllFile[i].fmode==2)
openflag[j][i].openflag = 1;
else cout<<"The file cannot be opened."<<endl;
}
else if(file_mode==1)
{
strcpy(str,"write only"); //复制模式到字符串
if(userfile[j]->userAllFile[i].fmode==1||userfile[j]->userAllFile[i].fmode==2)
openflag[j][i].openflag = 1;
else cout<<"The file cannot be opened."<<endl;
}
else if(file_mode==2)
{
strcpy(str,"read and write"); //复制模式到字符串
if(userfile[j]->userAllFile[i].fmode==2)
openflag[j][i].openflag = 1;
else cout<<"The file cannot be opened."<<endl;
}
if(openflag[j][i].openflag==1)
{
openflag[j][i].openmode = file_mode;
cout<<file_name<<" has been opened by "<<str<<" mode."<<endl;
}
}
}
cout<<endl;
}
void closeFile()
{
int n=0;
char file_name[MAXNAME]; //用于保存文件名
int j=existDirname(dirname); //判断路径并将其ID存放在变量中
cout<<"The following file(s) has been opened:"<<endl; //输出提示
for(int i=0;i<fileCount[j];i++) //循环所有文件
{
if(openflag[j][i].openflag==1) //若文件已打开
{
cout<<"\t"<<userfile[j]->userAllFile[i].fname; //输出文件名
n++; //记录打开文件数变量加1
}
if(n%4==0 && n!=0) //若一行已输出4个变量
cout<<endl; //输出回车
}
cout<<endl<<n<<" file(s) opened."<<endl; //输出总共被打开的文件数
if(n==0) //若无文件被打开
{
cout<<"No file can be closed."<<endl; //输出提示
return; //返回
}
cout<<"input file name:";
cin>>file_name; //读入文件名
i = existFile(file_name);
while(i==-1)
{
cout<<"The file has not existed."<<endl<<endl;
cout<<"input file name:";
cin>>file_name; //读入文件名
i = existFile(file_name);
}
if(openflag[j][i].openflag==0)
cout<<"Closed failed.\nThe file has been closed."<<endl;
else
{
openflag[j][i].openflag = 0;
openflag[j][i].openmode = 4;
cout<<"The file has been closed."<<endl;
}
cout<<endl;
}
void readFile()
{
int n=0;
char file_name[MAXNAME]; //用于保存文件名
char str[MAXNAME],str1[MAXNAME],c;
int j=existDirname(dirname); //判断路径并将其ID存放在变量中
cout<<"The following file(s) has been opened:"<<endl; //输出提示
for(int i=0;i<fileCount[j];i++) //循环所有文件
{
if(openflag[j][i].openflag==1) //若文件已打开
{
cout<<"\t"<<userfile[j]->userAllFile[i].fname; //输出文件名
n++; //记录打开文件数变量加1
}
if(n%4==0 && n!=0) //若一行已输出4个变量
cout<<endl; //输出回车
}
cout<<endl<<n<<" file(s) opened."<<endl; //输出总共被打开的文件数
if(n==0) //若无文件被打开
{
cout<<"No file can be read."<<endl; //输出提示
return; //返回
}
cout<<"input file name:";
cin>>file_name; //读入文件名
i = existFile(file_name);
while(i==-1)
{
cout<<"The file has not existed."<<endl<<endl;
cout<<"input file name:";
cin>>file_name; //读入文件名
i = existFile(file_name);
}
if(openflag[j][i].openflag==0) //若文件未被打开
cout<<"Read failed.\nThe file has not been opened."<<endl;
else
{
if(openflag[j][i].openmode==0||openflag[j][i].openmode==2)
{
itoa(userfile[j]->userAllFile[i].fileAddress,str,10);
strcpy(str1,"ownfile\\myfile\\file"); //复制地址到路径
strcat(str1,str); //追加文件ID
fp_file=fopen(str1,"rb"); //打开文件
fseek(fp_file,0,0); //文件指针指到头
cout<<"The text is:"<<endl; //输出提示
while(fscanf(fp_file,"%c",&c)!=EOF) //当文件未结束
{
if(c=='\n') cout<<endl; //若读到换行，输出回车
else cout<<c; //若读到字符，输出
}
cout<<userfile[j]->userAllFile[i].fileLength<<" length"<<endl; //输出文件长度
fclose(fp_file); //关闭文件
}
else //若文件不可读
cout<<"The file cannot be read."<<endl; //输出提示
}
cout<<endl;
}
/*void modifyFile()
{
}*/
void writeFile()
{
int n=0;
char file_name[MAXNAME]; //用于保存文件名
char str[MAXNAME],str1[MAXNAME];
int c;
int j=existDirname(dirname); //判断路径并将其ID存放在变量中
cout<<"The following file(s) has been opened:"<<endl; //输出提示
for(int i=0;i<fileCount[j];i++) //循环所有文件
{
if(openflag[j][i].openflag==1) //若文件已打开
{
cout<<"\t"<<userfile[j]->userAllFile[i].fname; //输出文件名
n++; //记录打开文件数变量加1
}
if(n%4==0 && n!=0) //若一行已输出4个变量
cout<<endl; //输出回车
}
cout<<endl<<n<<" file(s) opened."<<endl; //输出总共被打开的文件数
if(n==0) //若无文件被打开
{
cout<<"No file can be read."<<endl; //输出提示
return; //返回
}
cout<<"input file name:";
cin>>file_name; //读入文件名
i = existFile(file_name);
while(i==-1)
{
cout<<"The file has not existed."<<endl<<endl;
cout<<"input file name:";
cin>>file_name; //读入文件名
i = existFile(file_name);
}
if(openflag[j][i].openflag==0) //若文件未被打开
cout<<"Read failed.\nThe file has not been opened."<<endl;
else
{
if(openflag[j][i].openmode==1||openflag[j][i].openmode==2)
{
itoa(userfile[j]->userAllFile[i].fileAddress,str,10);
strcpy(str1,"ownfile\\myfile\\file"); //复制地址到路径
strcat(str1,str); //追加文件ID
if(userfile[j]->userAllFile[i].fileLength!=0)
{
cout<<"The file has text.Overwrite or append?"<<endl;
cout<<"(0-overwrite, 1-append)"<<endl; //选择要覆盖还是追加
cout<<"choose ";
cin>>c;
while(c<0 || c>1)
{
cout<<"Input error."<<endl<<endl;
cout<<"The file has text.Overwrite or append?"<<endl;
cout<<"(0-overwrite, 1-append)"<<endl; //选择要覆盖还是追加
cout<<"choose ";
cin>>c;
}
if(c==0) //若选择覆盖
{
cout<<"Overwrite:";
fp_file=fopen(str1,"wb"); //以新建方式打开文件
userfile[j]->userAllFile[i].fileLength=write(); //文件长度为原长度加新写入长度
}
else
{
cout<<"Append:";
fp_file=fopen(str1,"ab"); //以新建方式打开文件
userfile[j]->userAllFile[i].fileLength+=write(); //文件长度为原长度加新写入长度
}
}
else
{
fp_file=fopen(str1,"wb"); //以新建方式打开文件
userfile[j]->userAllFile[i].fileLength=write(); //文件长度为原长度加新写入长度
}
fclose(fp_file); //关闭文件
}
else //若文件不可读
cout<<"The file cannot be write."<<endl; //输出提示
}
cout<<endl;
}
void quitLogin()
{
char str[MAXNAME];
setPathNumber(1);
int i;
if(fp_mfd!=NULL) fclose(fp_mfd); //关闭所有指针
if(fp_ufd!=NULL) fclose(fp_ufd);
if(fp_file!=NULL) fclose(fp_file);
for(int j=0;j<userCount;j++) //循环所有的用户
{
strcpy(str,"ownfile\\"); //取文件路径
strcat(str,userfile[j]->userName); //将用户名追加到路径后
fp_ufd=fopen(str,"wb"); //以只写模式打开
fclose(fp_ufd); //关闭文件
fp_ufd=fopen(str,"ab"); //以追加方式打开文件
for(i=0;i<fileCount[j];i++) //循环所有的文件
fwrite(&userfile[j]->userAllFile[i],sizeof(file),1,fp_ufd); //写入用户文件中
fclose(fp_ufd); //关闭文件
}
}
void helpFile() //帮助函数
{
cout<<"dir -------- 浏览当前目录下所有文件"<<endl; //打印帮助信息
cout<<"create ----- 创建文件"<<endl;
cout<<"delete ----- 删除文件"<<endl;
cout<<"open ------- 打开文件"<<endl;
cout<<"close ------ 关闭文件"<<endl;
cout<<"read ------- 阅读文件"<<endl;
cout<<"write ------ 写文件"<<endl;
//cout<<"modify ----- 修改文件模式"<<endl;
cout<<"help ------- 打印帮助"<<endl;
cout<<"quit ------- 用户登出"<<endl<<endl;
}
void chooseCommand()
{
char choice[6]; //记录文件的操作
while(strcmp(choice,"quit")!=0) //当操作命令不是quit时，循环执行用户文件的操作
{
cout<<"OWNFILE\\"<<dirname<<"\\"; //显示当前目录
cin>>choice; //读入用户输入的文件操作类型
if (strcmp(choice,"dir")==0) dirFile(); //若与dir匹配，调用显示文件目录的函数
else if(strcmp(choice,"create")==0) createFile();
else if(strcmp(choice,"delete")==0) deleteFile();
else if(strcmp(choice,"open")==0) openFile();
else if(strcmp(choice,"close")==0) closeFile();
else if(strcmp(choice,"read")==0) readFile();
else if(strcmp(choice,"write")==0) writeFile();
//else if(strcmp(choice,"modigy")==0) modifyFile();
else if(strcmp(choice,"quit")==0) quitLogin();
else if(strcmp(choice,"help")==0) helpFile();
else cout<<"Bad command."<<endl; //输出错误操作的提示
}
}
void main()
{
int i;
int chioce=0;
if((fp_mfd=fopen("ownfile\\mfd","rb"))==NULL) //检验mfd文件是否已经存在
{
fp_mfd=fopen("ownfile\\mfd","wb"); //如果不存在择新建一个mfd文件
fclose(fp_mfd); //关闭mfd文件
}
for(i=0;i<MAX;i++) fileAddressno[i]=0; //将每个文件的物理地址数初始化为0
while(chioce!=3) //循环执行操作，直到用户选择3退出循环
{
cout<<"Enter your choice"<<endl; //输出提示信息
cout<<"1:Login"<<endl;
cout<<"2.Create new user"<<endl;
cout<<"3:Exit\n"<<endl;
cin>>chioce; //读入选择数
if(chioce==1) //选择1表示用户登录
{
loginFile(); //调用用户登录函数，判断用户是否合法
if(loginSucceed==1) //如果登录成功，用户则可以进行文件系统的相关操作
chooseCommand();
}
else if(chioce==2) createNewUser(); //选择2调用生成新用户函数
else if(chioce==3) break; //选择3退出
else cout<<"Wrong enter!"<<endl; //选择其他数输出错误提示
cout<<endl;
}
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