Yes, the man page is wrong. It was an error in the earlier version of the spec that it indicated it's ever possible to do any operation with a pthread_t that is not known to be an unjoined or live (if detached) thread. It's never been possible to use a possibly-stale pthread_t for anything in NPTL. There is no way to interrogate the system for whether a pthread_t value is valid--just like a pointer (which, in fact pthread_t is in our implementation), either it's valid or using it is undefined behavior. -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html