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#!/bin/sh cmd=$1 shift case "${cmd}" in interpreter) "${1}" $$ ;; dot) cp "${1}" . z="./$(basename "${1}")" x=$(${z} -1) case ${x} in /*) x=$(readlink "${x}");; *) echo "non absolute path" 1>&2; exit 1;; esac e=$(readlink "$(/bin/pwd)/${z}") if [ "${x}" != "${e}" ]; then echo bad: ${x} != ${e} 1>&2 exit 1 fi ;; *) echo bad command ${cmd} esac