int path_to_inumber(struct unixfilesystem *fs, const char *pathname,uint16_t dirinumber){
struct direntv6 buf;
// The pathname is to a file
if(plain_name(pathname)){
int success = directory_findname(fs,pathname,dirinumber, &buf);
if (success < 0){
return -1;
}
// Return the inumber
return buf.d_inumber;
// The pathname is to a directory
}else{
// The first directory in the pathname
char *dir = first(pathname);
int success = directory_findname(fs, dir, dirinumber, &buf);
// Check for errors
if (success < 0){
return -1;
}
// The rest of the pathname
const char *restOfPath = rest(pathname);
dirinumber = buf.d_inumber;
free(dir);
return path_to_inumber(fs,restOfPath,dirinumber);
}
}
int
file_open(char *path)
{
// Check if file exists
int file_num;
int inumber = path_to_inumber(path);
printf("path_to_inumber returned %d\n", inumber);
if ( inumber <= 0 )
return ERR_FILE_EXISTS;
// Check if file or dir
inode *in = get_inode(inumber);
printf("get_inode returned %p\n", in);
if ( in->directory_flag )
return ERR_FILE_NOT_FOUND;
// make file_info and add to open_files arraylist
file_info *new_file = (file_info *) malloc(sizeof(file_info));
strcpy(new_file->filepath, path);
new_file->inumber = inumber;
new_file->cursor = 0;
file_num = arraylist_add(new_file,open_files);
return file_num;
}
/*
* Return the inumber associated with the specified pathname. This need only
* handle absolute paths. Return a negative number if an error is encountered.
*/
int
pathname_lookup(struct unixfilesystem *fs, const char *pathname)
{
// Looking for the
if(strcmp(pathname,"/") == 0) return ROOT_INUMBER;
// Get rid of the first slash
pathname += strlen("/");
return path_to_inumber(fs,pathname,ROOT_INUMBER);
}
