DragonFlyBSD

I would suggest a few modifications:
(1) Use SIGTERM. It is common to have that meaning.
(2) Memorize the original thread in a global variable. Set a second one
to notify that it was called internally.
(3) In the signal handler, check if the second variable is called. If
not, handle this as external shutdown/reboot request. If it is, compare
pthread_self() with the first variable and pthread_exit() if they don't
match. Use a conditional variable to find out when all threads are dead.

Ideally this dance would not be necessary as exec is supposed to kill
all LWPs.

Joerg

exactly. I actually designed it to do so. Strange. What's exactly the problem?

cheers
simon

:Ideally this dance would not be necessary as exec is supposed to kill
:all LWPs.
:
:Joerg

It is?  I'll just make it kill all the LWPs then.

-Matt
                    Matthew Dillon 
                    <dillon@backplane.com>

:Joerg Sonnenberger wrote:
:> Ideally this dance would not be necessary as exec is supposed to kill
:> all LWPs.
:
:exactly. I actually designed it to do so. Strange. What's exactly the problem?
:
:cheers
: simon

There was a glitch where the LWPs weren't being killed so I put in a sanity
    check to refuse to exec if there were other LWPs.

I'll get it fixed.  exec just needs to do the first part of exit1() which
    kills the other LWPs before it continues.

-Matt
                    Matthew Dillon 
                    <dillon@backplane.com>

Yes. That is where exec and fork differ. Fork is not required to clone
the non-current LWP and that's why only async safe functions are allowed
after fork.

Joerg