gistfile1.c

function task_file_handle_d_path:string (task:long, fd:long) %{ /* pure */
	struct task_struct *p = (struct task_struct *)((long)THIS->task);
	struct files_struct *files;
	char *page = NULL;

	rcu_read_lock();
	files = kread(&p->files);
	page = (char *)__get_free_page(GFP_KERNEL);

	/* TODO: handle !page */
	if (page) {
		struct file *filp = fcheck_files(files, THIS->fd);
		char *path = NULL;

		if (filp) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
			/* git commit 9d1bc601 */
			path = d_path(&filp->f_path, page, PAGE_SIZE);
#else
			{
				struct dentry *dentry = kread(&filp->f_dentry);
				struct vfsmount *vfsmnt = kread(&filp->f_vfsmnt);

				if (dentry && vfsmnt) {
					path = d_path(dentry, vfsmnt, page, PAGE_SIZE);
				}
			}
#endif
			if (path && !IS_ERR(path)) {
				snprintf(THIS->__retvalue, MAXSTRINGLEN, "%s", path);
			}
		}
	}
	CATCH_DEREF_FAULT();

	if (page) free_page((unsigned long)page);

	rcu_read_unlock();
%}