Subject: Re: core dump filename format
To: Chris G. Demetriou <>
From: Andrew Brown <>
List: tech-userlevel
Date: 09/08/1999 11:27:00
>> makes more visual sense.  it might be fun to extend the %[npu] fields
>> with things like d (for a number, always, as in %u), o or x for the
>> pid (making it %xp), etc.  maybe even add %t for current time_t.  then
>> i could have a coredump string of
>>  /home/%u/.cores/%n.%08xt.%05p
>> so that none of my coredumps get smashed.
>a couple of things here:
>* i'm not sure i'd bother with the precision/padding specs.  just pick
>some sane default, and use it.  this doesn't need to be infinitely
>flexible, just serve its purpose, and that seems overkill (that could
>be added later if people really needed it).

that's certainly syntactic sugar...

>* it's probably useful to add a specifier for the process start time
>(p->p_stats->p_start) as well.

...but everyone seems to have comments on what would be nice given the
facility to control core dump naming.

with a little work, i'm sure we could make the format string as
convoluted as the posix printf semantics (with the $ stuff and

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