# test function names that cannot be exported unset foo # remove from environment if necessary function foo=bar { echo equals-1 } export -f 'foo=bar' echo status: $? foo\=bar printenv | grep 'foo=bar' ${THIS_SH} -c 'foo\=bar 2>/dev/null' function /bin/echo { echo bad echo } /bin/echo foo export -f '/bin/echo' ${THIS_SH} -c '/bin/echo bar'