DragonFly bugs List (threaded) for 2005-12
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Re: waitpid() with WUNTRACED flag? (was Re: Hang on ctrl+Z after the MPSAFE tsleep/wakeup commit)
On 27.12.2005, at 19:57, Matthew Dillon wrote:
Which is more correct? I don't know. I think the userland program
itself (the parent, as in your test program and in vipw) might be
incorrect.
I think from outside it usually should each be an atomar operation:
first stopping all foreground processes and later resuming all them at
the same time. So in the common case I think the parent shouldn't
notice either, but I know that it's not possible in the way we process
suspend signals now. Except, of course, if we add another sleep point
*in* wait. Or am I talking nonsense? (Few sleep at the moment)
cheers
simon
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