How to set resource limits (ulimit) per service with /etc/rc.subr and /etc/rc.conf

[Raphael Eiselstein]

Hi everyone,

we have some generic parameters for rc-scripts like 
${name}_program  ${name}_chroot ${name}_flags ${name}_nice ${name}_user
any many more.

I'm looking for a way to configure different ulimits per service. It
seems we have nothing about "ulimit" somewhere in /etc.

I'd like to have a unique way to configure resource limits, hard and
soft limits.

Resource limits can be set within a script for the current process by 
"ulimit [-HSabcdflmnpstuvw] [limit]" but not as a parameterised wrapper
like "nice" or "chroot" or "su", so prepeding just another "ulimit"
wrapper seems not to be an option.

Is there a unique way to have resource limits per service? I didn't find
any. AFAICS we have two options handling this:

#1 writing a /bin/sh wrapper prepeding ${_doit} containing ulimit
commands

#2 having (someone) to build up a generic binary like nice(1) getting
limit-parameters by commandline before execve'ing the final command, e.g. 

limitsh -Hv 20480 -Sv 10240 -n 300 -c command args

Problem: shells shoud implement "-c command args" and ulimit uses -c for
coredumpsize in 512byte blocks. To get around this: -Hc and -Sc are 
hard/soft limits to corefilesize, a single "-c" is always the
command-string like in sh(1) 

Any ideas? Did I miss something?

Regards
Raphael

-- 
Raphael Eiselstein <rabe at uugrn.org>               http://rabe.uugrn.org/
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