Changing CPU limits

[Lauri A. Szklut]

It appears that ULTRIX determines the cpu limit for a process at process
creation.  I can use the "limit" command to change my cpu limit for the
current process (csh) and any future processes.  My question:  is there 
a way to modify this limit once the process is already running?  Then if a 
process I had running in the background was approaching its cpu limit, I 
could up the limit and avoid having to restart the process from scratch.  
Any ideas would be appreciated.  Thanks.

Lauri Szklut
DEC Systems Software
MITRE Corporation
E-mail: lauri at mitre-bedford.arpa