Re: ps skips some procs

[linux-il]

Yedidyah Bar-David wrote:
I also saw this, and would like to find some docs.
I am pretty sure I am not hacked.
It's RH9 with vanilla 2.4.24. Maybe it's a confusion between RH's NPTL and
a kernel which isn't?
 

I don't know the details, but libc is also mentioned as having a say 
this phenomena (probably
because pthread_* are implemented by it).

I now checked which procs aren't shown in ps. They are:
The 3 children of ypbind (the father _is_ shown in ps)
 

These are probably threads (created with clone(CLONE_THREAD)), not fully 
independent
processes (created with the traditional fork(2). Yes, I'm aware that 
there are close relations
between the implementation of fork(2) and clone(2) on Linux).

Some nautilus procs (probably the same - one is shown in ps, havn't checked
        if he is their father)
Some xmms procs (same)
I looked at /proc (with ls, cat, etc.) to see this.
Can anyone point me to relevant docs? Maybe simply google for NPTL? I know
I should have done this before posting - see this not as a question but as
an answer (unless you already know it's a wrong one).
 

If you find something in google which explains the situation in short 
I'd be interested to hear about it.

Thanks,
 

Cheers,
--Amos

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