On Mon Jan 26 03:43:36 PST 2015, aris...@ar.aichi-u.ac.jp wrote:
> Hello,
>
> I have been playing the following program.
> I tried on official plan9, 9front, and 9atom.
> none of them showed messages that come from:
> sysfatal("fork: %r”);
> sysfatal("exec: %r");
> I suspect that
> fork()
> does not return -1 even if it failed in creating new process.
exactly.
the reason it never returns -1, is that introduces a new failure case in
every program running, and testing seems like a huge pain. just
testing for "handles fork returning -1" is not good enough, it has to have
a reasonable strategy for deailing with no procs. this is hard to get right.
just reboot. i have never been able to recover a system that hit noprocs.
i ended up wasting people's time trying.
- erik
ps. how may lines like this have you seen.
p = malloc(n);
if(p == nil){
...
}
is this really useful in most tools?
