static BD_DIR_H *_combine_dirs(BD_DIR_H *ovl, BD_DIR_H *rom)
{
BD_DIR_H *dp = calloc(1, sizeof(BD_DIR_H));
BD_DIRENT entry;
if (dp) {
dp->read = _comb_dir_read;
dp->close = _comb_dir_close;
dp->internal = calloc(1, sizeof(COMB_DIR));
if (!dp->internal) {
X_FREE(dp);
goto out;
}
while (!dir_read(ovl, &entry)) {
_comb_dir_append(dp, &entry);
}
while (!dir_read(rom, &entry)) {
_comb_dir_append(dp, &entry);
}
}
out:
dir_close(ovl);
dir_close(rom);
return dp;
}
/* Creates a file named NAME with the given INITIAL_SIZE.
Returns true if successful, false otherwise.
Fails if a file named NAME already exists,
or if internal memory allocation fails. */
bool
filesys_create (const char *name, off_t initial_size, enum file_type type)
{
block_sector_t inode_sector = 0;
char * parse = parse_filename (name);
//get the correct dir
struct dir *dir = dir_lookup_rec (parse);
bool success = (dir != NULL
&& free_map_allocate (1, &inode_sector)
&& inode_create (inode_sector, initial_size, type)
&& dir_add (dir, parse, inode_sector));
if (!success && inode_sector != 0)
free_map_release (inode_sector, 1);
if( success == true && type == FILE_DIR ) {
//we want to add . and .. as well if it is a dir
//open the created directory
struct file * created = filesys_open(parse);
struct dir * mydir = dir_open(file_get_inode (created));
//add . to it
dir_add (mydir, ".", inode_sector);
struct inode * parent = dir_get_inode (dir);
block_sector_t inode_sector_parent = inode_id(parent);
//add .. to it
dir_add (mydir, "..", inode_sector_parent);
dir_close(mydir);
file_close(created);
}
dir_close (dir);
return success;
}
bool filesys_cd (const char* dir)
{
bool result = false;
char* name_;
if (strlen(dir) == 0) {
return false;
} else {
struct dir* dir_ = filesys_get_dir(dir);
name_ = filesys_get_name(dir);
struct inode* inode = NULL;
bool isdir = false;
if (strcmp(name_, "") == 0) {
if (thread_current()->cur_dir)
dir_close(thread_current()->cur_dir);
thread_current()->cur_dir = dir_;
result = true;
} else if (dir_lookup(dir_, name_, &inode, &isdir) ==NULL ||
isdir == NULL) {
dir_close(dir_);
result = false;
} else if (isdir != NULL){
if (thread_current()->cur_dir)
dir_close(thread_current()->cur_dir);
thread_current()->cur_dir = dir_open(inode);
dir_close(dir_);
result = true;
}
}
free(name_);
return result;
}
static struct dir* filesys_get_dir (const char* path)
{
struct dir* dir;
int len = strlen(path);
char *p = (char *)malloc(sizeof(char) * (len + 1));
memcpy(p, path, len);
p[len]='\0';
bool openRoot = p[0]=='/' || thread_current ()->cur_dir == NULL;
dir = openRoot ? dir_open_root() : dir_reopen(thread_current()->cur_dir);
char *save_ptr;
char *token = strtok_r(p, "/", &save_ptr);
char *next_token = token!=NULL ? strtok_r(NULL, "/", &save_ptr): NULL;
struct inode *inode;
bool isdir;
while (next_token!=NULL){
if (dir_lookup(dir, token, &inode, &isdir) == NULL) return NULL;
dir_close(dir);
dir = dir_open(inode);
if (isdir == false){
dir_close(dir);
return NULL;
}
token = next_token;
next_token = strtok_r(NULL, "/", &save_ptr);
}
return dir;
}
/* Opens the file with the given NAME.
Returns the new file if successful or a null pointer
otherwise.
Fails if no file named NAME exists,
or if an internal memory allocation fails. */
struct file *
filesys_open (const char *name)
{
struct dir *dir;
struct inode *inode = NULL;
char parsed_name[NAME_MAX + 1];
if (*name == NULL)
{
return NULL;
}
bool success = parse_path (name, &dir, parsed_name);
if ((strlen (parsed_name) > NAME_MAX))
{
dir_close (dir);
return NULL;
}
if (success)
{
if (dir != NULL)
dir_lookup (dir, parsed_name, &inode);
dir_close (dir);
}
struct file *result = file_open (inode);
return result;
}
bool filesys_chdir (const char* name)
{
struct dir* dir = containing_dir(name);
char* file_name = get_name(name);
struct inode *inode = NULL;
if (dir != NULL){
if (strcmp(file_name, "..") == 0){
//Check parent
if (!dir_parent(dir, &inode)){
free(file_name);
return false;
}
}
else if ((strlen(file_name) == 0 && (dir_is_root(dir))) || (strcmp(file_name, ".") == 0)){
thread_current()->cur_dir = dir;
free(file_name);
return true;
}else{
dir_lookup (dir, file_name, &inode);
}
}
dir_close (dir);
free(file_name);
dir = dir_open(inode);
if (dir)
{
dir_close(thread_current()->cur_dir);
thread_current()->cur_dir = dir;
return true;
}
return false;
}
/* Deletes the file named NAME.
Returns true if successful, false on failure.
Fails if no file named NAME exists,
or if an internal memory allocation fails. */
bool
filesys_remove (const char *name)
{
char leaf_name[NAME_MAX + 1];
if (!dir_get_leaf_name (name, leaf_name))
return false;
struct dir *parent_dir = dir_get_parent_dir (name);
if (parent_dir == NULL)
return false;
struct inode *inode;
if (!dir_lookup (parent_dir, leaf_name, &inode))
{
dir_close (parent_dir);
return false;
}
bool success;
if (!inode_is_dir(inode)) // if is file
success = dir_remove (parent_dir, leaf_name);
else
{
if (dir_is_empty (inode))
{
success = dir_remove (parent_dir, leaf_name);
}
else
success = false;
}
dir_close (parent_dir);
return success;
}
/* Opens the file with the given NAME.
Returns the new file if successful or a null pointer
otherwise.
Fails if no file named NAME exists,
or if an internal memory allocation fails. */
struct file *
filesys_open (const char *name)
{
if (strnlen (name, FULLPATH_MAX_LEN) == 0)
return NULL;
if (strcmp (".", name) == 0)
{
block_sector_t cwd = thread_current ()->cwd_sector;
struct inode *curr = NULL;
curr = inode_open (cwd);
struct dir *p;
p = dir_open (inode_open (curr->data.parent_dir_sector));
struct dir_entry e;
size_t ofs;
ASSERT (p != NULL);
for (ofs = 0;
inode_read_at (p->inode, &e, sizeof e, ofs) == sizeof e;
ofs += sizeof e)
{
if (e.inode_sector == cwd && e.in_use)
{
return filesys_open (e.name);
}
}
return NULL;
}
struct inode *crr = NULL;
crr = inode_open (thread_current ()->cwd_sector);
struct dir *parent_dir = dir_reopen(dir_get_parent_dir (name));
//if (crr->data.is_dir)
//parent_dir = dir_open (inode_open (crr->data.parent_dir_sector));
//else
if (parent_dir == NULL)
return NULL;
struct inode *inode = NULL;
char leaf_name[NAME_MAX + 1];
if (!dir_get_leaf_name (name, leaf_name) &&
strnlen(leaf_name, NAME_MAX) == 0)
{
inode = inode_reopen (dir_get_inode (parent_dir));
dir_close (parent_dir);
return file_open (inode);
}
if (parent_dir != NULL)
dir_lookup (parent_dir, leaf_name, &inode);
dir_close (parent_dir);
return file_open (inode);
}
/* Removes any entry for NAME in DIR.
Returns true if successful, false on failure,
which occurs only if there is no file with the given NAME. */
bool
dir_remove (struct dir *dir, const char *name)
{
struct dir_entry e;
struct inode *inode = NULL;
bool success = false;
off_t ofs;
ASSERT (dir != NULL);
ASSERT (name != NULL);
//lock the directory for the rest of the lookup operation
inode_lock(dir->inode);
name = getfilename(name);
/* Find directory entry. */
if (!lookup (dir, name, &e, &ofs))
goto done;
/* Open inode. */
inode = inode_open (e.inode_sector);
if (inode == NULL)
goto done;
//if it is still open don't allow deletion
if(inode_type(inode) == FILE_DIR) {
//is file in use?
if(inode_opencnt(inode) > 1)
goto done;
char * temp = (char *)malloc(sizeof(char) * (NAME_MAX + 1) );
struct dir * dirtemp = dir_open(inode);
//is dir empty?
if (dir_readdir(dirtemp,temp)) {
free(temp);
dir_close(dirtemp);
goto done;
}
free(temp);
dir_close(dirtemp);
}
/* Erase directory entry. */
e.in_use = false;
if (inode_write_at (dir->inode, &e, sizeof e, ofs) != sizeof e)
goto done;
/* Remove inode. */
inode_remove (inode);
success = true;
done:
//unlock the directory
inode_unlock(dir->inode);
inode_close (inode);
return success;
}
struct dir *get_directory(const char *path, bool flag){
if(strlen(path)==0)
return NULL;
struct dir *curr;
char *word, *brkt, *buffer = malloc(strlen(path)+1), *save, *last;
struct inode *inode;
memcpy(buffer, path, strlen(path)+1);
save = buffer;
if(buffer[0]=='/'){
curr = dir_open_root();
last = strtok_r(buffer+1, "/", &brkt);
}
else{
if(thread_current()->dir)
curr = dir_reopen(thread_current()->dir);
else
curr = dir_open_root();
last = strtok_r(buffer, "/", &brkt);
}
while(1){
word = last;
if(word == NULL) break;
last = strtok_r(NULL, "/", &brkt);
if(last == NULL && flag) break;
if(strcmp(word,"")==0);
else if(strcmp(word,".")==0);
else if(strcmp(word,"..")==0){
inode = inode_open(inode_parent_number(dir_get_inode(curr)));
dir_close(curr);
curr = dir_open(inode);
}
else{
inode = NULL;
if(dir_lookup(curr, word, &inode)){
dir_close(curr);
if(inode_is_dir(inode))
curr = dir_open(inode);
else{
inode_close(inode);
free(save);
return NULL;
}
}
else{
dir_close(curr);
free(save);
return NULL;
}
}
}
free(save);
if(inode_removed(curr->inode))
return NULL;
return curr;
}
void exit_handler (int status) {
printf("%s: exit(%d)\n", &thread_current ()->name, status);
lock_acquire(&ref_count_lock);
struct p_data* parent = thread_current()->parent_data;
if (parent != NULL) {
parent->exit_status = status;
parent->child_thread = NULL;
sema_up(&parent->sema);
parent->ref_count--;
if (parent->cwd != NULL) {
dir_close(parent->cwd);
}
if (parent->ref_count == 0) {
thread_current()->parent_data = NULL;
free(parent);
}
}
if (thread_current()->cwd != NULL) {
dir_close(thread_current()->cwd);
}
/* iterate through children and remove this as their parent*/
struct list_elem* e;
struct list *childs = &thread_current()->child_processes;
for (e = list_begin(childs); e != list_end(childs); e = list_next(e)) {
struct p_data* child = list_entry(e, struct p_data, elem);
child->ref_count --;
list_remove(e);
if (child->ref_count == 0) {
struct thread *t = child->child_thread;
if (t != NULL) {
t->parent_data = NULL;
}
free(child);
}
}
struct list *files = &thread_current()->files;
for (e = list_begin(files); e != list_end(files); e = list_begin(files)) {
close_handler(list_entry(e, struct file_struct, elem)->fd);
}
struct file_struct *executable = thread_current()->executable;
if (executable != NULL) {
file_allow_write(executable->sys_file);
file_close(executable->sys_file);
thread_current()->executable = NULL;
free(executable);
}
lock_release(&ref_count_lock);
thread_exit();
}
/* Creates directory. True if successful. */
bool
filesys_mkdir (const char *dir)
{
bool success = false;
/*The string *dir cannot be empty.*/
if (*dir == NULL)
{
return success;
}
/* Locates the directory where the new directory should be created. */
struct dir *create_dir;
char parsed_name[NAME_MAX + 1];
parse_path (dir, &create_dir, parsed_name);
block_sector_t sector;
/*Find a free sector for the directory.*/
if (!free_map_allocate (1, §or))
{
return success;
}
success = dir_create (sector, 16);
if (!success)
{
free_map_release (sector, 1);
return success;
}
success = dir_add (create_dir, parsed_name, sector);
if (!success)
{
free_map_release (sector, 1);
return success;
}
/* Get the dir struct of the directory that is just created and add "." and "..". */
struct inode *inode = inode_open (sector);
struct dir *new_dir = dir_open (inode);
ASSERT (inode != NULL);
ASSERT (new_dir != NULL);
dir_add (new_dir, ".", sector);
dir_add (new_dir, "..", create_dir->inode->sector);
dir_close (new_dir);
dir_close (create_dir);
return success;
}
/* Opens the file with the given NAME.
Returns the new file if successful or a null pointer
otherwise.
Fails if no file named NAME exists,
or if an internal memory allocation fails. */
struct inode *
filesys_open (const char *name)
{
struct dir *search_dir = get_cwd(name);
if (search_dir == NULL) {
return NULL;
}
struct inode *inode = NULL;
if (name[0] == '/') {
inode = dir_get_inode(search_dir);
}
char *part = malloc(NAME_MAX + 1);
if (part == NULL) {
return false;
}
memset(part, 0, NAME_MAX + 1);
int retrieved_next_part;
for (retrieved_next_part = get_next_part(part, &name); retrieved_next_part > 0;
retrieved_next_part = get_next_part(part, &name)) {
if (dir_lookup (search_dir, part, &inode)) {
if (!inode_is_dir(inode)) {
break;
} else {
dir_close(search_dir);
search_dir = dir_open(inode);
if (search_dir == NULL) {
free(part);
return false;
}
}
} else {
inode = NULL;
break;
}
}
if (inode != NULL && inode_is_dir(inode) && get_next_part(part, &name) == 0) {
inode = inode_reopen(inode);
}
dir_close(search_dir);
if (inode != NULL && get_next_part(part, &name) != 0) {
inode_close(inode);
inode = NULL;
}
free(part);
return inode;
}
/* changes the current working directory to path */
bool filesys_chdir(const char *path)
{
struct dir *dir = get_containing_dir(path);
char *file_name = get_file_name(path);
struct inode *inode = NULL;
struct thread *cur = thread_current();
if (dir != NULL)
{
if(strcmp(file_name, "..") == 0)
{
if(!dir_get_parent(dir, &inode))
{
free(file_name);
return false;
}
}
else if(strcmp(file_name, ".") == 0)
{
cur->cwd = dir;
free(file_name);
return true;
}
else if(dir_is_root(dir) && strlen(file_name) == 0)
{
cur->cwd = dir;
free(file_name);
return true;
}
else
{
dir_lookup (dir, file_name, &inode);
}
}
dir_close(dir);
free(file_name);
dir = dir_open(inode);
if(dir != NULL)
{
dir_close(cur->cwd);
cur->cwd = dir;
return true;
}
return false;
}
dir_t*
dir_open(char *path) {
dir_t *d=0;
int i, err = -1;
char *p=0;
do {
i = strlen(path)+4;
p = malloc(i);
assertb(p);
strncpy(p, path, i);
strncat(p, "/*", i);
d = calloc(1, sizeof(*d));
assertb(d);
d->h = INVALID_HANDLE_VALUE;
d->h = FindFirstFile(p, &d->fi);
if(d->h == INVALID_HANDLE_VALUE
&& GetLastError() == ERROR_NO_MORE_FILES) {
break;
}
assertb_syserr(d->h);
d->first = 1;
err = 0;
} while(0);
if( p ) {
free(p);
}
if( err ) {
dir_close(d);
d = 0;
}
return d;
}
struct inode *
filesys_open_inode (const char *path, bool *is_directory)
{
struct dir *dir = NULL;
struct inode *inode = NULL;
bool success = false;
char *name = malloc (NAME_MAX + 1);
if (name == NULL)
goto done;
if (!dir_follow_path (thread_current ()->cwd, path, &dir, name))
goto done;
if (dir == NULL)
goto done;
/* open directory in this case */
if (*path != '\0' && strlen (name) == 0)
{
inode = inode_reopen (dir_get_inode (dir));
if (inode == NULL)
goto done;
*is_directory = true;
}
else if (!dir_lookup (dir, name, &inode, is_directory))
goto done;
success = true;
done:
dir_close (dir);
free (name);
return success ? inode : NULL;
}
static int moddir_glob( INSTANCE * my, int * params )
{
const char * path = string_get( params[ 0 ] );
static __DIR_ST * dh = NULL;
int result;
if ( dh && strcmp( dh->path, path ) )
{
dir_close( dh );
dh = NULL;
}
if ( !dh ) dh = dir_open( path );
string_discard( params[ 0 ] );
if ( !dh )
{
result = string_new( "" );
string_use( result );
return ( result );
}
return ( __moddir_read( dh ) ) ;
}
static void _findMetaXMLfiles(META_ROOT *meta, BD_DISC *disc)
{
BD_DIR_H *dir;
BD_DIRENT ent;
dir = disc_open_dir(disc, "BDMV" DIR_SEP "META" DIR_SEP "DL");
if (dir == NULL) {
BD_DEBUG(DBG_DIR, "Failed to open meta dir BDMV/META/DL/\n");
return;
}
int res;
for (res = dir_read(dir, &ent); !res; res = dir_read(dir, &ent)) {
if (ent.d_name[0] == '.')
continue;
else if (strncasecmp(ent.d_name, "bdmt_", 5) == 0) {
META_DL *new_dl_entries = realloc(meta->dl_entries, ((meta->dl_count + 1)*sizeof(META_DL)));
if (new_dl_entries) {
uint8_t i = meta->dl_count;
meta->dl_count++;
meta->dl_entries = new_dl_entries;
memset(&meta->dl_entries[i], 0, sizeof(meta->dl_entries[i]));
meta->dl_entries[i].filename = str_dup(ent.d_name);
strncpy(meta->dl_entries[i].language_code, ent.d_name+5,3);
meta->dl_entries[i].language_code[3] = '\0';
str_tolower(meta->dl_entries[i].language_code);
}
}
}
dir_close(dir);
}
/* Opens the file with the given NAME.
Returns the new file if successful or a null pointer
otherwise.
Fails if no file named NAME exists,
or if an internal memory allocation fails. */
struct file *
filesys_open (const char *name)
{
char s[100];
char *save_ptr;
// printf("%s \n",name);
memcpy(s,name,strlen(name)+1);
struct inode *inode = NULL;
char *file_name = get_file_name(name);
// printf("file name : %s\n",file_name);
if( strtok_r(s,"/",&save_ptr) ==NULL&&strlen(name)>0 )
{
// printf("aaa\n");
free(file_name);
return file_open(inode_open(1));
}
if( strcmp(file_name,"")==0 )
return NULL;
struct dir *dir = get_directory(name);
// printf("sector of dir : %d\n", inode_get_inumber(dir_get_inode(dir)));
// printf("lookup start\n");
if (dir != NULL)
{
// printf("here?\n");
if(strcmp(file_name,".")==0)
{
// printf("here\n");
inode = dir_get_inode(dir);
// printf("ohhhhhh\n");
// dir_close (dir);
free(file_name);
if(inode_is_removed(inode))
return NULL;
else
return file_open (inode);
}
else if( strcmp(file_name,"..")==0)
{
inode = dir_get_inode(inode);
// dir_close (dir);
free(file_name);
return file_open (inode);
}
else
dir_lookup (dir, file_name, &inode);
dir_close (dir);
if(inode==NULL)
return NULL;
free(file_name);
return file_open (inode);
}
else
{
// printf("here\n");
return NULL;
}
// if(inode_is_removed(inode))
// return NULL;
// return file_open (inode);
}
/* Creates a file named NAME with the given INITIAL_SIZE.
Returns true if successful, false otherwise.
Fails if a file named NAME already exists,
or if internal memory allocation fails. */
bool
filesys_create (const char *name, off_t initial_size)
{
block_sector_t inode_sector = 0;
struct dir *dir;
char parsed_name[NAME_MAX + 1];
if (*name == NULL || (strlen (name) > NAME_MAX))
{
return false;
}
bool success = parse_path (name, &dir, parsed_name);
if (!success)
{
return success;
}
struct inode *inode;
success = (dir != NULL
&& free_map_allocate (1, &inode_sector)
&& inode_create (inode_sector, initial_size, false)
&& dir_add (dir, parsed_name, inode_sector)
&& dir_lookup (dir, ".", &inode));
if (!success && inode_sector != 0)
free_map_release (inode_sector, 1);
dir_close (dir);
return success;
}
void chdir (struct intr_frame *f) {
const char * dirname = *(char **)value_stack(f->esp,4);
//if empty or root return
if(strlen(dirname) == 0 || strcmp( dirname, "/")) f->eax = 0;
/* CLOSE FILE ? */
struct file * file = filesys_open(dirname);
if ( file == NULL ) {
f->eax = 0;
return;
}
struct inode * myinode = file_get_inode (file);
enum file_type type = inode_type (myinode);
//if the file is a dir open it and set pwd to it
if(type == FILE_DIR) {
f->eax = 1;
dir_close(thread_current()->pwd);
thread_current()->pwd = dir_open(inode_reopen(myinode));
}
else f->eax = 0;
file_close(file);
}
/*! Remove a file */
bool remove(const char *f_name) {
struct dir* cur_dir;
char name[15];
/* Checks the validity of the given pointer */
//printf("going to remove file %s\n\n", f_name);
if (!checkva(f_name))
exit(-1);
if (!decompose_dir(f_name, name, &cur_dir))
return false;
if (strcmp(".", name) == 0 || strcmp("..", name) == 0)
return false;
lock_acquire(&filesys_lock);
/* Remove the file, while locking the file system. */
bool flag = filesys_dir_remove(name, cur_dir);
//printf("name decomposed! %x\n\n", cur_dir);
dir_close(cur_dir);
lock_release(&filesys_lock);
return flag;
}
/* Creates a file named NAME with the given INITIAL_SIZE.
Returns true if successful, false otherwise.
Fails if a file named NAME already exists,
or if internal memory allocation fails. */
bool
filesys_create (const char *path, off_t initial_size)
{
block_sector_t inode_sector = 0;
struct dir *dir = NULL;
bool success = false;
char *name = malloc (NAME_MAX + 1);
if (name == NULL)
goto done;
if (!dir_follow_path (thread_current ()->cwd, path, &dir, name))
goto done;
success = (dir != NULL
&& free_map_allocate (1, &inode_sector)
&& inode_create (inode_sector, initial_size)
&& dir_add (dir, name, inode_sector));
if (!success && inode_sector != 0)
{
cache_remove (fs_cache, inode_sector, 1);
free_map_release (inode_sector, 1);
}
done:
dir_close (dir);
free (name);
return success;
}
/* Opens the file with the given NAME.
Returns the new file if successful or a null pointer
otherwise.
Fails if no file named NAME exists,
or if an internal memory allocation fails. */
struct file *
filesys_open (const char *name)
{
char *cp_name;
char *file_name;
struct dir *dir;
struct inode *inode = NULL;
cp_name = malloc( sizeof(char) * (strlen(name)+1) );
if(cp_name == NULL)
return NULL;
file_name = malloc( sizeof(char) * (strlen(name)+1) );
if(file_name == NULL){
free(cp_name);
return NULL;
}
/* copy name to cp_name */
strlcpy(cp_name, name, strlen(name)+1 );
dir = parse_path (cp_name, file_name);
if (dir != NULL)
dir_lookup (dir, file_name, &inode);
dir_close (dir);
free(file_name);
free(cp_name);
return file_open (inode);
}
/* Creates a file named NAME with the given INITIAL_SIZE.
Returns true if successful, false otherwise.
Fails if a file named NAME already exists,
or if internal memory allocation fails. */
bool
filesys_create (const char *name, off_t initial_size, bool isdir)
{
block_sector_t inode_sector = 0;
// Get directory
struct dir *dir = get_containing_dir(name);
char *file_name = get_filename(name);
// Get file name
char* file_name = get_filename(name);
bool success = false;
if (strcmp(file_name, ".") != 0 && strcmp(file_name, "..") != 0)
{
success = (dir != NULL
&& free_map_allocate (1, &inode_sector)
&& inode_create (inode_sector, initial_size, isdir)
&& dir_add (dir, file_name, inode_sector));
}
if (!success && inode_sector != 0)
free_map_release (inode_sector, 1);
dir_close (dir);
free(file_name);
return success;
}
static void _findMetaXMLfiles(META_ROOT *meta, const char *device_path)
{
BD_DIR_H *dir;
BD_DIRENT ent;
char *path = NULL;
path = str_printf("%s" DIR_SEP "BDMV" DIR_SEP "META" DIR_SEP "DL", device_path);
dir = dir_open(path);
if (dir == NULL) {
BD_DEBUG(DBG_DIR, "Failed to open meta dir %s\n", path);
X_FREE(path);
return;
}
int res;
for (res = dir_read(dir, &ent); !res; res = dir_read(dir, &ent)) {
if (ent.d_name[0] == '.')
continue;
else if (ent.d_name != NULL && strncasecmp(ent.d_name, "bdmt_", 5) == 0) {
uint8_t i = meta->dl_count;
meta->dl_count++;
meta->dl_entries = realloc(meta->dl_entries, (meta->dl_count*sizeof(META_DL)));
meta->dl_entries[i].filename = str_dup(ent.d_name);
strncpy(meta->dl_entries[i].language_code, ent.d_name+5,3);
meta->dl_entries[i].language_code[3] = '\0';
str_tolower(meta->dl_entries[i].language_code);
}
}
dir_close(dir);
X_FREE(path);
}
/*! Deletes the file named NAME. Returns true if successful, false on failure.
Fails if no file named NAME exists, or if an internal memory allocation
fails. */
bool filesys_remove(const char *name) {
struct dir *dir = dir_open_root();
bool success = dir != NULL && dir_remove(dir, name);
dir_close(dir);
return success;
}
/* Creates a file named NAME with the given INITIAL_SIZE.*/
bool
filesys_create (const char *name, off_t initial_size, bool isdir)
{
if (strlen(name) == 0) return false;
block_sector_t inode_sector = 0;
struct dir *dir_ = filesys_get_dir(name);
char *name_ = filesys_get_name(name);
bool success = false;
if (strcmp (name_, "") == 0) goto done;
success = (dir_ && free_map_allocate (1, &inode_sector)
&& inode_create (inode_sector, initial_size)
&& dir_add (dir_, name_, inode_sector, isdir));
struct inode *ninode = NULL;
struct dir *ndir = NULL;
bool success1 = true;
if (success && isdir){
success1 = ((ninode = inode_open (inode_sector))
&& (ndir = dir_open (ninode))
&& dir_add (ndir, ".", inode_sector, true)
&& dir_add (ndir, "..",inode_get_inumber (dir_get_inode (dir_)), true));
}
if (inode_sector != 0 && !success)
free_map_release (inode_sector, 1);
if (success && !success1) {
success = false;
printf("Failure: create dir: %s\n", name);
dir_remove (dir_, name_);
}
done:
dir_close (dir_);
free(name_);
if (!ndir && ninode){
inode_close(ninode);
} else if (ndir) {
dir_close(ndir);
}
return success;
}
//returns the inode of the last dir in name before the last /
//the user has to check for existing file after the /
struct dir *
dir_lookup_rec (const char *name) {
//printf("lookup path is %s\n",name);
//if the string starts with / it is an absolut path
//root dir
if ( strcmp( name, "/") == 0 ) return dir_open_root();
//for the return value
int success = 0;
char *token ,*save_ptr;
char * temp = (char *)malloc(strlen(name) + 1 );
strlcpy (temp, name, strlen(name) + 1);
//open root and start
struct dir * current;
//if it is relative make it absolute
if ( name[0] != '/' ) {
current = dir_reopen(thread_current()->pwd);
} else {
current = dir_open_root();
}
struct inode * nextdir = dir_get_inode(current);
//go through and check that the previous direcrtories exist
for (token = strtok_r (temp, "/", &save_ptr); token != NULL; token = strtok_r (NULL, "/", &save_ptr)) {
//somethings wrong if this hapens
if (current == NULL ) break;
//last round has to be not existing
if (strlen(save_ptr) == 0) {
success = 1;
break;
}
//goto next if token is empty in case of //a/
if(strlen(token) != 0) {
//check if this directory exists true if exists
if ( dir_lookup (current, token,&nextdir) ) {
//check if it is a directory and then open it
enum file_type type = inode_type (nextdir);
//is it a dir
if(type == FILE_DIR) {
dir_close(current);
current = dir_open(nextdir);
}
else break;
}
else break;
}
}
if( success == 1) return current; else return NULL;
}
bool filesys_chdir(const char *name)
{
bool success=false;
struct inode *inode = NULL;
struct thread *t = thread_current();
char *file_name = get_file_name(name);
struct dir *dir = get_directory(name);
// printf("lookup start\n");
if (dir != NULL)
{
if( strcmp(file_name,".")==0)
{
t->curr_dir = dir_reopen(dir);
free(file_name);
return true;
}
else if(strcmp(file_name,"..")==0)
{
if( inode_get_inumber(dir_get_inode(dir))==1 )
{
t->curr_dir = dir_open(inode_open(1));
free(file_name);
dir_close(dir);
return true;
}
else
{
t->curr_dir = dir_open( inode_open(inode_get_parent(dir_get_inode(dir))));
free(file_name);
dir_close(dir);
return true;
}
}
success=dir_lookup (dir, file_name, &inode);
}
dir_close (dir);
if(success)
{
t->curr_dir = dir_open(inode);
}
free(file_name);
/* printf("changed dir sector: %d\n",inode_get_inumber(dir_get_inode(t->curr_dir)));
printf("value %d\n",inode_get_data(dir_get_inode(t->curr_dir),0));*/
return success;
}
