I believe it is customary to use an environment variable PAGER to allow overriding of less (or more, or whatever the system default is). In ksh-speak:
case $pagefile in
*.bz2)
bzcat $pagefile | ${PAGER:-less} ;;
*.gz)
zcat $pagefile | ${PAGER:-less} ;;
*)
${PAGER:-less} $pagefile ;;
esac
-- Jim
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