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Filename : sensible-pager
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#!/bin/sh
# Copyright 2007 Jari Aalto; Released under GNU GPL v2 or any later version
PATH="$PATH:/usr/share/sensible-utils/bin"

# Prevent recursive loops, where these values are set to this script
program="$(realpath "$(command -v "$0")")"

TryEnv()
{
    # global $candidate
    [ -z "$candidate" ] && return
    # Prevent recursive loops, where environment variables are set to this script
    [ x$(realpath "$(command -v "$candidate" || true)" || true) = x"$program" ] && return
    # interpret like environ (7) man page. Do not use eval in order to not leak variables
    sh -c "$candidate \"\$@\"" PAGER "$@"
    ret=$?
    # Operating system command not found
    [ "$ret" -ne 126 ] && [ "$ret" -ne 127 ] && exit "$ret"
}

for candidate in "$PAGER" "$SENSIBLE_PAGER" pager more; do
    TryEnv "$@"
done


echo "Couldn't find a pager!" 1>&2
echo 'Set the $PAGER environment variable to your desired pager.'
exit 1