Re: Syscall kill() can send signal to thread ID

I don't quite understand what you mean, sorry. But if kill() returns
-ESRCH for tid which is not equal to tgid, kill() can only send signal
to thread group via main thread id, that is what BSD did and manual
said. It seems not odd?

It's still odd because there's one TID per process that's valid for
kill by accident.  That's all.

Thanks,
Florian