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Re: cygwin stable and cvs snapshot - fork() bug
On Nov 5 16:17, Corinna Vinschen wrote:
> On Nov 5 09:49, Lev Bishop wrote:
> > It indeed seems this is behaviour not described in SuSv3. But several
> > unices support (some variant of) this behaviour. At least linux,
> > freebsd, hp-ux, solaris 10 mention it in their man pages, and openbsd
> > and netbsd seem to implement it that way even though they don't
> > describe it in the man pages.
> Yeah, we're using the FreeBSD code so the behaviour is already as
> in Linux, as I mentioned in my previous mail.
> > A further linux extension: In addition to all the above, Linux goes
> > even further and still allows you to attach the segment even after
> > marking it for deletion.
> > [...]
> > Freebsd (since version 5.2) has a sysctl kern.ipc.shm_allow_removed
> > which seems to allow you to force the linux behaviour on this issue.
> > Openbsd automatically does it (only) when running linux binaries via
> > compat_linux(8).
> Since we're using FreeBSD code, there's a variable shm_allow_removed in
> the code already which allows this behaviour. There's just no way right
> now to set it. It's always zero. It would be quite easy to add a
> cygserver.conf setting for this, though.
I've applied two patches which change shmctl(IPC_RMID) to the BSD/Linux
behaviour as well as adding a kern.ipc.shm_allow_removed option to the
/etc/cygserver.conf file. Please give it a try.
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
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