rem: return vfs_unlink(path, false);
add: return common_unlink(path, false);
context: user_unlink(const char *upath){	char path[SYS_MAX_PATH_LEN+1];	int rc;	if((addr)upath >= KERNEL_BASE && (addr)upath <= KERNEL_TOP)		return ERR_VM_BAD_USER_MEMORY;	rc = user_strncpy(path, upath, SYS_MAX_PATH_LEN);	if(rc < 0)		return rc;	path[SYS_MAX_PATH_LEN] = 0;	return vfs_unlink(path, false);}