Preemptive strategies

Chris Buxton cbuxton at
Thu Sep 18 09:58:31 PDT 2008

I'm not familiar with 'runas' for Linux. (There's a Windows command of  
that name...) On the surface, it sounds like 'sudo'.

'sudo' can be handy for starting a service in a chroot jail with its  
uid already set to an unprivileged user. The process can be assigned  
the necessary privileges to then open ports for listening, open a log  
socket for writing, etc.

jailkit's socketd, as mentioned by Heiko Zuerker, looks really handy  
if you want a jailed service to log to syslogd. Most syslogd  
implementations can only create one log socket. The syslogd from  
syslog-ng can, but for example if you're using busybox's syslogd,  
you're otherwise out of luck.

Chris Buxton
Professional Services
Men & Mice

On Sep 17, 2008, at 8:00 PM, Robert Connolly wrote:

> On Monday September 15 2008 12:21:16 pm Chris Buxton wrote:
>> I have some experience with chroot jails, including setting them up
>> from scratch and debugging them.
> Do you use the 'runas' program? Are there reasons not to use it?
> robert
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