On Sun, 21 Mar 1999, Alfred Perlstein wrote:
> On Sat, 20 Mar 1999, John S. Dyson wrote:
>
> > Michael E. Mercer said:
> > > Hello,
> > >
> > > This was posted to freebsd-questions with no reply.
> > > I tried this and the child process created a core file.
> > > I also tried the other options and they seem to work.
> > > Just RFPROC and RFMEM DON'T!
> > >
> > rfork(RFMEM) doesn't easily work from C. You need to
> > create an assembly stub.
> >
> > --
> > John | Never try to teach a pig to sing,
> > dy...@iquest.net | it makes one look stupid
> > jdy...@nc.com | and it irritates the pig.
> >
>
> I've seen about 6 people ask about this because the manual lies about
> what is done. I asked a while back about it, and John was kind enough
> to dig up some code that used rfork to properly split the stack should
> I try to dig it up?
>
> In the meantime, can someone commit this or suggest something?
For the suggest something, you realize that with Richard's VM_STACK code it
should be relatively trivial to make this automatic (suggestion: add
RFSTACK flag).
>
> thanks,
> -Alfred
>
> Index: rfork.2
> ===================================================================
> RCS file: /home/ncvs/src/lib/libc/sys/rfork.2,v
> retrieving revision 1.8
> diff -u -r1.8 rfork.2
> --- rfork.2 1999/01/26 02:38:09 1.8
> +++ rfork.2 1999/03/21 04:49:10
> @@ -54,7 +54,8 @@
> will then inherit all the shared segments the parent process owns. Other
> segment
> types will be unaffected. Subsequent forks by the parent will then
> propagate the shared data and bss between children. The stack segment
> -is always split. May be set only with
> +is not split and must be allocated manually via an assembler subroutine.
> +May be set only with
> .Dv RFPROC .
> .It RFSIGSHARE
> If set, the kernel will force sharing the sigacts structure between the
>
>
>
>
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