/**
* @author Ivan Gualandri
* @param char* path percorso del file da aprire
* @return DIR* puntatore alla cartella aperta se esiste, NULL altrimenti
*
* Dato un path contenente una cartella viene aperta se presente, e si torna il puntatore a DIR*
*/
DIR *opendir(const char *path){
int mpoint_id = 0;
//char tmp_path[CURPATH_LEN];
char* rel_path;
DIR* pdir;
#ifdef DEBUG
int error = get_abs_path((char*)path);
printf("AbsPath in opendir: %s len: %d\nError code: %d\n", path, strlen(path), error);
#else
get_abs_path((char*)path);
#endif
//printf("%s\n", path);
mpoint_id = get_mountpoint_id((char*)path);
rel_path = get_rel_path(mpoint_id, path);
//printf("Rel Path len%d - %s\n", strlen(rel_path), rel_path);
if(mountpoint_list[mpoint_id].dir_op.opendir_f!=NULL) {
pdir = mountpoint_list[mpoint_id].dir_op.opendir_f(rel_path);
pdir->handle = mpoint_id;
return pdir;
}
else {
//printf("Could not open_dir no function found\n");
return NULL;
}
return NULL;
}
/**
* @author Ivan Gualandri
* @param char* path percorso del file da aprire
* @param int oflags parametri di apertura
*
* Dato un path viene aperto se presente, e si torna il numero di descrittore che lo contiene
* @todo Inserire gestione flags
*/
int open(const char *path, int oflags, ...){
int prova;
int mpid;
int ret_fd;
int error = 0;
char *newpath;
va_list ap;
va_start(ap, oflags);
ret_fd = 0;
//printf("Path: %s\n", path);
prova = va_arg(ap, int);
newpath = kmalloc(CURPATH_LEN * sizeof(char));
memset(newpath, '\0', CURPATH_LEN);
cur_fd=0;
if(cur_fd == _SC_OPEN_MAX) cur_fd = 0;
while(fd_list[cur_fd].mountpoint_id != -1 && cur_fd < _SC_OPEN_MAX){
//printf("%d %d\n", cur_fd, fd_list[cur_fd].mountpoint_id);
cur_fd++;
}
if(cur_fd == _SC_OPEN_MAX) {
printf("No more file descriptors available\n");
return -1;
}
strcpy(newpath, path);
error = get_abs_path((char*) newpath);
//printf("After get_abs: %s %s\n", newpath, current_user.cur_path);
mpid = get_mountpoint_id((char*) newpath);
//printf("Cur_fd: %d\n",cur_fd);
if(mpid >-1) {
fd_list[cur_fd].mountpoint_id = mpid;
newpath = get_rel_path(mpid, (char *)newpath);
} else {
printf("That path doesn't exist\n");
va_end(ap);
return -1;
}
if( mpid > -1 && mountpoint_list[fd_list[cur_fd].mountpoint_id].operations.open != NULL){
fd_list[cur_fd].fs_spec_id = (int) mountpoint_list[fd_list[cur_fd].mountpoint_id].operations.open(newpath, oflags);
if(fd_list[cur_fd].fs_spec_id == -1){
printf("No file's Found\n");
va_end(ap);
return -1;
}
}
else {
if(mpid>-1) printf("No OPEN services found here\n");
va_end(ap);
return -1;
}
va_end(ap)
fd_list[cur_fd].offset = 0;
fd_list[cur_fd].flags_mask = oflags;
ret_fd = cur_fd;
cur_fd++;
free(newpath);
return ret_fd;
}
