/***********SAVE_ORPHANS***************/
void orphan_search(uint8_t *image_buf, struct bpb33* bpb, int * refcount, int FATsz) {
int count = 0; //count orphans
int i = 2;
for(; i < FATsz; i++)
{
uint16_t cluster = get_fat_entry(i, image_buf, bpb);
if(cluster != (FAT12_MASK & CLUST_FREE) && cluster != (FAT12_MASK & CLUST_BAD) && refcount[i] == 0)
{
printf("FOUND AN ORPHAN, CLUSTER # = %d\n", i);
count++;
int orphan_size = 1;
refcount[i] = 1;
uint16_t orphan_cluster = cluster;
while(is_valid_cluster(orphan_cluster, bpb))
{
if (refcount[orphan_cluster] == 1)
{
set_fat_entry(orphan_cluster, (FAT12_MASK & CLUST_EOFS), image_buf, bpb);
}
else if(refcount[orphan_cluster] > 1)
{
struct direntry *dirent = (struct direntry*)cluster_to_addr(cluster, image_buf, bpb);
dirent->deName[0] = SLOT_DELETED;
refcount[orphan_cluster]--;
printf("DELETED\n");
}
else if(refcount[orphan_cluster] < 1)
{
refcount[orphan_cluster]++;
}
orphan_cluster = get_fat_entry(orphan_cluster, image_buf, bpb);
orphan_size++;
}
//got to concatanate stuff
struct direntry *dirent = (struct direntry*)root_dir_addr(image_buf, bpb);
char name[5];
sprintf(name, "%d", count);
char str[1024] = "";
strcat(str, "located");
strcat(str, name);
strcat(str, ".dat\0");
char * file_name = str;
create_dirent(dirent, file_name, i, orphan_size * 512, image_buf, bpb);
printf("added %s to directory \n", str);
printf("orphan cluster chain size = %d \n", orphan_size);
}
}
printf("orphans saved: %d\n", count);
}
int main(int argc, char** argv)
{
uint8_t *image_buf;
int fd;
struct bpb33* bpb;
if (argc != 2)
{
usage(argv[0]);
}
image_buf = mmap_file(argv[1], &fd);
bpb = check_bootsector(image_buf);
printf("Root directory address is: %lu\n", root_dir_addr(image_buf, bpb));
traverse_root(image_buf, bpb);
unmmap_file(image_buf, &fd);
return 0;
}
