C++ (Cpp) uid2grp_lookup_by_unameの例

コード例 #1

ファイル: uid2grp.c プロジェクト: Anuradha-Talur/nfs-ganesha

bool name2grp(const struct gsh_buffdesc *name, struct group_data **gdata)
{
	bool success = false;
	uid_t uid = -1;

	PTHREAD_RWLOCK_rdlock(&uid2grp_user_lock);
	success = uid2grp_lookup_by_uname(name, &uid, gdata);

	/* Handle common case first */
	if (success && !uid2grp_expired(*gdata)) {
		uid2grp_hold_group_data(*gdata);
		PTHREAD_RWLOCK_unlock(&uid2grp_user_lock);
		return success;
	}
	PTHREAD_RWLOCK_unlock(&uid2grp_user_lock);

	if (success) {
		/* Cache entry is expired */
		PTHREAD_RWLOCK_wrlock(&uid2grp_user_lock);
		uid2grp_remove_by_uname(name);
		PTHREAD_RWLOCK_unlock(&uid2grp_user_lock);
	}

	*gdata = uid2grp_allocate_by_name(name);
	PTHREAD_RWLOCK_wrlock(&uid2grp_user_lock);
	if (*gdata)
		uid2grp_add_user(*gdata);
	success = uid2grp_lookup_by_uname(name, &uid, gdata);
	if (success)
		uid2grp_hold_group_data(*gdata);
	PTHREAD_RWLOCK_unlock(&uid2grp_user_lock);

	return success;
}

コード例 #2

ファイル: uid2grp.c プロジェクト: asias/nfs-ganesha

bool name2grp(const struct gsh_buffdesc *name, struct group_data **pgdata)
{
	bool success;
	uid_t uid = -1;

	pthread_rwlock_rdlock(&uid2grp_user_lock);

	success = uid2grp_lookup_by_uname(name, &uid, pgdata);

	pthread_rwlock_unlock(&uid2grp_user_lock);

	if (success)
		return true;
	else {
		/* Something we can mutate and count on as terminated */
		char *namebuff = alloca(name->len + 1);

		memcpy(namebuff, name->addr, name->len);
		*(namebuff + name->len) = '\0';

		if (pwentname2grp(namebuff, &uid, *pgdata)) {
			pthread_rwlock_wrlock(&uid2grp_user_lock);

			success = uid2grp_add_user(name, uid, *pgdata);

			pthread_rwlock_unlock(&uid2grp_user_lock);

			if (!success)
				LogMajor(COMPONENT_IDMAPPER, "name2grp %s",
					 namebuff);
			return true;
		} else
			return false;
	}
}