📄 fms.cpp
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mesg("Too few parametets!");
else if(command->next->next!=NULL)
mesg("Too many parameters!");
else
{
strcpy(tempfile,command->next->string);
for(i=0;i<savenum;i++)
{
if(strcmp(tempfile,userfd[i].filename)==0)
break;
}
if(i>=savenum)
mesg("File not existed!");
else
{
tempsave=i;
for(i=0;i<opennum;i++)
{
if(strcmp(tempfile,openfd[i].filename)==0)
break;
}
if(i>=opennum)
mesg("File not opened");
else
{
if(userfd[tempsave].lenght<1000)
printf("\n The file size is %d KB",userfd[tempsave].lenght);
else if(userfd[tempsave].lenght==1000)
printf("\n The file size is 1000 KB");
else
printf("\n The file size is %d,%d KB",userfd[tempsave].lenght/1000,userfd[tempsave].lenght%1000);
mesg("File read");
}
}
}
}
void myopen()/*打开*/
{
int i=0;
int type=0;
char tempcode;
char tempfile[100];
if(strcmp(username,"")==0)
mesg("No user login!");
else if(command->next==NULL)
mesg("Too few parameters!");
else
{
strcpy(tempfile,"");
tempcode='r';
if(strcmp(command->next->string,"/r")==0)
{
tempcode='r';
type=1;
}
else if(strcmp(command->next->string,"/w")==0)
{
tempcode='w';
type=1;
}
else if(strcmp(command->next->string,"/d")==0)
{
tempcode='d';
type=1;
}
else if(command->next->string[0]=='/')
mesg("Error! /r/w/d request!");
else if(command->next->next!=NULL)
mesg("Too many parameters!");
else
strcpy(tempfile,command->next->string);
/////////////////////////////////////////////////////
//////////////////////////////////////////////////////
if(type==1)
{
if(command->next->next!=NULL)
{
if(command->next->next->next!=NULL)
mesg("Too many parameters!");
else
strcpy(tempfile,command->next->next->string);
}
else
mesg("Too few parameters!");
}
if(strcmp(tempfile,""))
{
for(i=0;i<savenum;i++)
{
if(strcmp(tempfile,userfd[i].filename)==0)
break;
}
if(i>=savenum)
mesg("File not existed!");
else
{
for(i=0;i<opennum;i++)
{
if(strcmp(tempfile,openfd[i].filename)==0)
break;
}
if(i<opennum)
{
mesg("File already opened!");
if(openfd[i].opencode!=tempcode)
{
openfd[i].opencode=tempcode;
mesg("File permission changed!");
}
}
else if(opennum>=L)
{
mesg("Error! connot open file! number of opened files limited!");
}
else
{
strcpy(openfd[opennum].filename,tempfile);
openfd[opennum].opencode=tempcode;
workfile=opennum;
opennum++;
mesg("File open sucess!");
}
}
}
}
}
void myclose()/*关闭*/
{
int i=0;
int tempsave=0;
char tempfile[100];
if(strcmp(username,"")==0)
mesg("No user lgoin!");
else if(command->next==NULL)
mesg("Too few parametets!");
else if(command->next->next!=NULL)
mesg("Too many parameters!");
else
{
strcpy(tempfile,command->next->string);
for(i=0;i<savenum;i++)
{
if(strcmp(tempfile,userfd[i].filename)==0)
break;
}
if(i>=savenum)
mesg("File not existed!");
else
{
for(i=0;i<opennum;i++)
{
if(strcmp(tempfile,openfd[i].filename)==0)
break;
}
if(i>=opennum)
mesg("File not opened");
else
{
if(i==opennum-1)
opennum--;
else
{
for(;i<opennum-1;i++)
{
strcpy(openfd[i].filename,openfd[i+1].filename);
openfd[i].opencode=openfd[i+1].opencode;
}
opennum--;
}
mesg("Close file success!");
}
}
}
}
void mywrite()/*写*/
{
int i=0;
int tempsave=0;
char tempfile[100];
if(strcmp(username,"")==0)
mesg("No user lgoin!");
else if(command->next==NULL)
mesg("Too few parametets!");
else if(command->next->next!=NULL)
mesg("Too many parameters!");
else
{
strcpy(tempfile,command->next->string);
for(i=0;i<savenum;i++)
{
if(strcmp(tempfile,userfd[i].filename)==0)
break;
}
if(i>=savenum)
mesg("File not existed!");
else
{
tempsave=i;
for(i=0;i<opennum;i++)
{
if(strcmp(tempfile,openfd[i].filename)==0)
break;
}
if(i>=opennum)
mesg("File not opened");
else
{
mesg("File write");
int tt=rand();
if(userfd[tempsave].lenght<=1000)
printf("\n The file size from %d KB to %d KB",userfd[tempsave].lenght,userfd[tempsave].lenght+tt);
/* else if(userfd[tempsave].lenght=1000)
printf("\n The file size from 1000 KB");*/
else
printf("\n The file size form %d,%d KB to %d,%d KB",userfd[tempsave].lenght/1000,userfd[tempsave].lenght%1000,userfd[tempsave].lenght+tt/1000,userfd[tempsave].lenght+tt%1000);
userfd[tempsave].lenght=userfd[tempsave].lenght+tt;
}
}
}
}
void help()/*帮助*/
{
static char *cmd[]={"login","setpass","logout","create",
"open","read","write","delete","dir",
"help","exit","copy","rename"};
static char *cmdhlp[]={"aommand format: login [<username>]",
"command format:setpass",
"command format:logout",
"command format:create <filename>",
"command format:open [/r/w/d] <filename>",
"command format:read <filename>",
"command format:write <filename>",
"command format:delete <filename>",
"command format:dir [/u/o/f]",
"command format:help [<command>]",
"command format:exit",
"command format:copy <source filename> <destination filename>",
"command format:rename <old filename> <new filename>"};
static char *detail[]={"explain:user login in the file system.",
"explain:modify the user password.",
"explain:user logout the file system.",
"explain:creat a new file.",
"explain:/r -- read only [deflaut]\n\t /w -- list opened files \n\t /d --read,modify and delete.",
"explain:read the file.",
"explain:modify the file.",
"explain:delete the file.",
"explain:/u -- list the user account\n\t /0 -- list opened files\n\t /f --list user file[deflaut].",
"explain:<command> -- list the command detail format and explain.\n\t [deflaut] list the command.",
"explain:exit from the file sysytem.",
"explain:copy from one file to another file.",
"explain:modify the file name."};
int helpnum=13;
int i=0;
if(command->next==NULL)
{
mesg(cmdhlp[9]);
mesg(detail[9]);
mesg("step 1: login");
printf("\t if user then login,if user not exist then create new user");
mesg("step 2: open the file for read(/r),write(/w)or delete(/d)");
printf("\t you can open one or more files.one command can open one file");
mesg("step 3: read,write or delete some one file");
printf("\t you can operate one of the opened files.one command can open one file");
mesg("step 4: close the open file");
printf("\t you can close one of the oepned files.one command can open one file");
mesg("step 5: user loout.close all the user opened files");
printf("\n command list:");
for(i=0;i<helpnum;i++)
{
if(i%4==0)
printf("\n");
printf(" %-10s",cmd[i]);
}
}
else if(command->next->next!=NULL)
mesg("Too many parameters!");
else
{
for(i=0;i<helpnum;i++)
{
if(strcmp(command->next->string,cmd[i])==0)
break;
}
if(i>=helpnum)
mesg("the command not existed!");
else
{
mesg(cmdhlp[i]);
mesg(detail[i]);
}
}
}
void dir()/*列目录文件*/
{
int i=0;
int type=0;
char tempcode;
if(strcmp(username,"")==0)
mesg("No user login!");
else
{
if(command->next==NULL)
{
tempcode='f';
}
else
{
if(strcmp(command->next->string,"/u")==0)
{
tempcode='u';
}
else if(strcmp(command->next->string,"/o")==0)
{
tempcode='o';
}
else if(strcmp(command->next->string,"/f")==0)
{
tempcode='f';
}
else if(command->next->string[0]=='/')
mesg("Error! /u/o/f request!");
else if(command->next->next!=NULL)
mesg("Too many parameters!");
}
if('u'==tempcode)
{
printf("list the user account\n");
printf("usename\n");
for(i=0;i<usernum;i++)
{
printf("%s\n",mainfd[i].username);
}
}
else if('f'==tempcode)
{
printf("list opened files\n");
printf("filename length protect\n");
for(i=0;i<savenum;i++)
{
printf("%s%s%d%s%s%c\n",userfd[i].filename," ",userfd[i].lenght,"KB"," ",userfd[i].protect);
}
}
else if('o'==tempcode)
{
printf("list user files\n");
printf("filename opencode\n");
for(i=0;i<opennum;i++)
{
printf("%s%s%c\n",openfd[i].filename," ",openfd[i].opencode);
}
}
}
}
void mycopy()/*复制*/
{
char sourfile[256],destfile[256];
int i=0,j=0,temp=0;
FILE *fp;
char tempchar;
if(strcmp(username,"")==0)
mesg("No user lgoin!");
else if(command->next==NULL)
mesg("Too few parametets!");
else if(command->next->next==NULL)
mesg("Too few parametets!");
else if(command->next->next->next!=NULL)
mesg("Too many parameters!");
else
{
strcpy(sourfile,command->next->string);
strcpy(destfile,command->next->next->string);
for(i=0;i<savenum;i++)
{
if(strcmp(sourfile,userfd[i].filename)==0)
break;
}
temp=i;
if(i>=savenum)
printf("\n the source file not eixsted!");
else
{
for(i=0;i<opennum;i++)
{
if(strcmp(sourfile,openfd[i].filename)==0)
break;
}
if(i>=opennum)
printf("\n the source file not opened!");
else
{
for(j=0;j<opennum;j++)
{
if(strcmp(destfile,openfd[i].filename)==0)
break;
}
if(j<opennum)
mesg("Error! the destination file opened,you must close it first.");
else
{
for(j=0;j<savenum;j++)
{
if(strcmp(destfile,userfd[i].filename)==0)
break;
}
if(j<savenum)
{
mesg("Warning! the destination file exist!");
printf("\n Are you sure to recover if ? [Y/N]");
while(!kbhit());
tempchar=getch();
if(tempchar=='N'||tempchar=='n')
mesg("Cancel! file not copy.");
else if(tempchar=='Y'||tempchar=='y')
{
mesg("File copy success!file recovered!");
userfd[j].lenght=userfd[i].lenght;
userfd[j].protect=userfd[i].protect;
fp=fopen(username,"w+");
for(i=0;i<savenum;i++)
{
fputs(userfd[i].filename,fp);
fputs("\n",fp);
fprintf(fp,"%C\n%d\n",userfd[i].protect,userfd[i].lenght);
}
fclose(fp);
}
}
else if(savenum>=M)
mesg("copy false! file total limited.");
else
{
strcpy(userfd[savenum].filename,destfile);
userfd[savenum].lenght=userfd[temp].lenght;
userfd[savenum].protect=userfd[temp].protect;
savenum++;
fp=fopen(username,"w+");
for(i=0;i<savenum;i++)
{
fputs(userfd[i].filename,fp);
fputs("\n",fp);
fprintf(fp,"%c\n%d\n",userfd[i].protect,userfd[i].lenght);
}
fclose(fp);
mesg("File copy success!");
}
}
}
}
}
}
void myrename()/*文件改名*/
{
char oldfile[256],newfile[256];
int i=0,temp=0;
if(strcmp(username,"")==0)
mesg("No user lgoin!");
else if(command->next==NULL)
mesg("Too few parametets!");
else if(command->next->next==NULL)
mesg("Too few parametets!");
else if(command->next->next->next!=NULL)
mesg("Too many parameters!");
else
{
strcpy(oldfile,command->next->string);
strcpy(newfile,command->next->next->string);
for(i=0;i<savenum;i++)
{
if(strcmp(oldfile,userfd[i].filename)==0)
break;
}
temp=i;
if(temp>=savenum)
printf("\n the source file not eixsted!");
else if(temp!=i&&i<savenum)
{
printf("\n newfile and the existing files is the same name, please re-naming!");
}
else
{
for(i=0;i<opennum;i++)
{
if(strcmp(oldfile,openfd[i].filename)==0)
break;
}
if(i>=opennum)
printf("\n the source file not opened!");
else if(strcmp(oldfile,newfile)==0)
{
printf("Rename false! oldfile and newfile can not be the same.");
}
else
{
strcpy(openfd[i].filename,newfile);
strcpy(userfd[temp].filename,newfile);
mesg("Rename file success!\n");
}
}
}
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