*Point to last parameter in BASH command line
 bash$ set a b c d e f g h i j k
 bash$ eval echo \$$#
 a1
 bash$ eval echo \${$#}
 k
 bash$ 

* Extract basename from the path
D:\cygwin\home\sfg-6.2/bin\sysproc
D:\cygwin\home\sfg-6.2/bin/sysproc

echo ${a##*[\\/]}
sysproc