Re: A bug in setpgid in kernel

Matthias Urlichs (smurf@noris.de)
25 Nov 1998 13:42:32 +0100

Nick.Holloway@alfie.demon.co.uk (Nick Holloway) writes:
>
> An interesting aspect is that if run under "strace -f", this test passes.
> I can't explain that -- I'll leave that as an aside.
>
Easy -- under strace_-f, the parent of _every_ traced process is redirected
to be "strace".

This has a lot of implications; for instance, a waitpid() call for an
undead child will return an error instead of hanging.

Basically, never believe anything about exit states or wait*() results when
you use strace -f. You _will_ get different results.

-- 
Matthias Urlichs  |  noris network GmbH   |   smurf@noris.de  |  ICQ: 20193661
The quote was selected randomly. Really.    |      http://www.noris.de/~smurf/

-- 
perl: error in loading shared libraries: /usr/lib/perl/lib/5.00475/i586-linux-thread/auto/DB_File/DB_File.so: undefined symbol: db_version


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