Uses OS X's "Quick Look" as a pseudo-pager.

quicklook-pager.sh

#!/bin/bash

# It'd be nice to allow users to pipe stuff into this and have it displayed.
# I had it working, but then I added the press-any-key-to-close functionality
# because clicking the X was annoying, and that consumes stdin.
#
# Ideally this would cause the window manager to focus on the quicklook window,
# which would be responsable for closing itself, but qlmanage seems to not be
# capable of doing that (at least as of 10.6.8).
#
# Perhaps a solution would be to use osascript to launch quicklook instead of
# going through the command line interface which according to the man page
# (and the title of the resulting quicklook qindow) appears to just be for
# debugging, but that might create issues with correctly returning focus to
# the terminal afterwards.

if [ -z "$*" ]; then
	echo "Usage: $(basename "$0") <file> ..." > /dev/stderr
	exit
fi

cleanup() {
	kill $QL_PID
	exit
}
trap cleanup USR1

qlmanage -p "$@" &>/dev/null &
QL_PID=$!

{
	read -s -n 1
	kill -USR1 $$
} < /dev/stdin &
SUB_PID=$!

wait $QL_PID
kill $SUB_PID