There is
              NUMPROC=`grep -cl "^cpu[0-9]+" /proc/stat`
in /etc/rc.d/rc.local,
but manual page of grep says:
     -l, --files-with-matches
              Suppress  normal  output; instead print the name of
              each input file from which  output  would  normally
              have  been  printed.  The scanning will stop on the
              first match.

So it will stop on the first ^cpu line and print also the filename
/proc/stat.
Why is there -l?

initscripts 4.48
grep (GNU grep) 2.3