AWK=awk
GREP=grep

if [ $(uname -s) == "SunOS" ]
then
  AWK=/usr/bin/nawk
  GREP=/usr/xpg4/bin/grep
fi

if $GREP -q whatever /some/file
then
   $AWK -F: '{....}' /some/file
fi

PATH=$(getconf PATH):$PATH

PATH=`getconf PATH`:$PATH

PATH=~/bin:`getconf PATH`:$PATH

set path = ( ~/bin `getconf PATH` $path)

mkdir -p ~/bin
cd ~/bin
cat > awk <<%
#!/bin/sh
PATH=`getconf PATH`:$PATH awk "$@"
%
ln -s awk nawk
ln -s awk gawk