truss and procfs strange problem.
Dan Nelson
dnelson at allantgroup.com
Thu Jan 26 14:33:52 PST 2006
In the last episode (Jan 26), Proniewski Patrick said:
> I have some new details :
>
> >> $ truss ls
> >> truss: cannot open /proc/4509/mem: No such file or directory
>
> in that case, the command issued as a truss argument (ls, ...) is
> stuck in state "D". `man ps` says it "Marks a process in disk (or
> other short term, uninterruptible) wait."
I think that's this case:
parent child
------ -----
call fork()
fork() returns
(being created)
open /proc/%d/mem (fails)
(still being created)
creation complete, waiting
for parent to trace
> these process wont be killed, I'll have to reboot. (procctl won't
> clear the processes...)
You can continue tracing these processes if you run "truss -p <pid>",
since that's pretty much what they're waiting for :)
--
Dan Nelson
dnelson at allantgroup.com
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