void deleteInode(disk_t disk, Inode* inode){
char * databuf = malloc(sizeof(char) * disk->block_size);
readblock(disk,inode->block,databuf);
int i;
bool gotsize = false;
bool gotpointers = false;
bool gotlink = false;
bool gotname = false;
int numberbufIndex = 0;
char * numberbuf = malloc(sizeof(char) * 16);
for(i = 0; databuf[i] != '\0' && i < disk->block_size;i+=1){
if(!gotsize){
if(databuf[i] == '\n'){
gotsize = true;
}
}else if(!gotpointers){
if(databuf[i] == '\n'){
gotpointers = true;
}
}else if(!gotname){
if(databuf[i] == '\n'){
gotname = true;
}
}else{
gotlink = true;
numberbuf[numberbufIndex] = databuf[i];
numberbufIndex +=1;
}
}
int link;
if(gotlink){
numberbuf[numberbufIndex] = '\0';
link = str2int(numberbuf);
Inode * newinode = readInode(disk,link);
deleteInode(disk,newinode);
freeInode(newinode);
}
int * blockmap = read_block_map(disk);
blockmap[inode->block] = 0;
write_block_map(disk,blockmap);
free(blockmap);
free(databuf);
free(numberbuf);
}
Inode * rewriteInode(disk_t disk, Inode* inode){
deleteInode(disk,inode);
Inode* newinode = writeInode(disk,inode->block,inode->pointers,inode->isDirectory,inode->name);
freeInode(inode);
return newinode;
}
int serverUnlink(int pinum, char * name){
int i, k;
memLoad();
//take care of error cases
if(pinum < 0 || pinum > 4095)
return -1;
if(strlen(name) > 28 || strlen(name) < 0)
return -1;
if(inodeMap.inodes[pinum] == -1 )
return -1;
if(strcmp(name, "..\0") == 0 || strcmp(name, ".\0") == 0 )
return -1;
//get pinum address
int pinumLocation = inodeMap.inodes[pinum];
//lseek to this location
lseek(diskFD, pinumLocation, 0);
//we have just lseeked to the inode, we need to read the inode
MFS_Inode pInode;
int bytesRead = read(diskFD,&pInode, sizeof(pInode));
if(DEBUG){
printf("bytesRead: |%d|\n", bytesRead);
}
/*************************************************************************/
/*
close(diskFD);printDisk();exit(0);
if(pInode.stats.type == MFS_REGULAR_FILE){
printInode(&pInode);
exit(0);
}
*/
/*************************************************************************/
//check if this is a directory or not
if(pInode.stats.type != MFS_DIRECTORY)
return -1;
int found = -1, deleteDirBlockLoc, deleteIndex, deleteInodeLocation;
MFS_Dir_Block dirBlock;
for(i = 0; i < 14; i++){
if(pInode.blockPtrs[i] >= 0 ){
lseek(diskFD,pInode.blockPtrs[i],0);
read(diskFD, &dirBlock, sizeof(dirBlock));
for(k = 0; k < 128; k++){
if(strcmp(dirBlock.dirEntries[k].name, name) ==0){
//printf("dirBlock.dirEntries[k].name, name: %s, %s\n",dirBlock.dirEntries[k].name, name );
//printf(" dirBlock.dirEntries[k].inum:%d\n", dirBlock.dirEntries[k].inum);
//exit(0);
found = 1;
deleteInodeLocation = inodeMap.inodes[dirBlock.dirEntries[k].inum];
deleteIndex = k;
deleteDirBlockLoc = pInode.blockPtrs[i];
i = 5000;
}
}
}
}
if(found < 0)
return 0;
/**************************************ERROR***********************************/
//there is something wrong here with the inodeLocation that you are passing to delete
/**************************************ERROR***********************************/
MFS_Inode inodeToDelete;
lseek(diskFD, deleteInodeLocation,0);
read(diskFD, &inodeToDelete, sizeof(inodeToDelete));
//printf("SIZE: %d\n", inodeToDelete.stats.size);exit(0);
if(inodeToDelete.stats.type == MFS_DIRECTORY){
if(inodeToDelete.stats.size > 2*(MFS_BLOCK_SIZE)){
return -1;
}
/* else{
dirBlock.dirEntries[deleteIndex].inum = -1;
memcpy(dirBlock.dirEntries[deleteIndex].name, "\0", sizeof("\0"));
//write out the directory block
lseek(diskFD, pInode.blockPtrs[i],0);
write(diskFD, &dirBlock, sizeof(dirBlock));
}
*/
}
deleteInode(deleteInodeLocation);
dirBlock.dirEntries[deleteIndex].inum = -1;
memcpy(dirBlock.dirEntries[deleteIndex].name, "\0", sizeof("\0"));
//write out the directory block
lseek(diskFD, deleteDirBlockLoc,0);
write(diskFD, &dirBlock, sizeof(dirBlock));
//update pInode
int sizeIndex = 0;
for(i =0; i < 14; i++)
if(pInode.blockPtrs[i] != -1)
sizeIndex =i;
//if(sizeIndex > 3)
pInode.stats.size = (sizeIndex+1)*MFS_BLOCK_SIZE;
//pInode.stats.size -=MFS_BLOCK_SIZE;
//write out the pInode
lseek(diskFD, pinumLocation,0);
write(diskFD, &pInode, sizeof(pInode));
memLoad();
//delete the directory file, update pInode
//close(diskFD);
//printDisk();
//diskFD = open(file, O_RDWR);
return 0;
//TODO
//get to the directory block, search for name
//if the index is 3 AND no other files exist, delete(update Imap, ckpt, etc) pInode from the whole disk
//if last piece in Imappiece, then remove the Imap, update ckpt
// return 0;
}
