trickily #!/bin/sh # Copyright 2007 Jari Aalto; Released under GNU GPL v2 or any later version # Prevent recursive loops, where these values are set to this script p="$(command -v "$0")" [ -n "$PAGER" ] && [ "$(command -v "$PAGER" || true)" = "$p" ] && PAGER= IsError() { # Operating system command not found [ "$1" -ne 126 ] && [ $1 -ne 127 ] } Run() { "$@" ret=$? IsError "$ret" } Run ${PAGER:-pager} "$@" || Run more "$@" || { echo "Couldn't find a pager!" 1>&2 echo "Set the \$PAGER environment variable to your desired pager." 1>&2 exit 1; } exit "$ret"