job priority

[Conor P. Cahill]

In article <20533 at adm.BRL.MIL>, SIMSN%NUSDISCS.BITNET at cunyvm.cuny.edu writes:
> 
>  In Sys V, is there a way you can raise the job's priority after sending
>  it to the background earlier on?

There is no standard system call that can be used to modify the priority, or
nice value, of an already existing process.  You can, however, using the
symbol table in /unix modify the nice value in the process structure (in /dev/kmem,
of course) for the indicated process.  Unless the permissions are really 
screwed up on your system, only the superuser will be able to do this.

This is not a thing to do lightly since a minor screw up in the location
to which you write the desired value can cause a kernel panic.  Good luck.