| readonly a=A | |
| b=B | |
| readonly b | |
| # readonly on already readonly var is harmless | |
| readonly b a | |
| readonly | grep '^readonly [ab]=' | |
| # this should work | |
| export a b | |
| export -n a b | |
| echo Ok:$? | |
| env | grep -e^a= -e^b= # shows nothing | |
| # these should all fail (despite the same value being assigned) | |
| # bash does not abort even in non-interactive more (in script) | |
| true | |
| a=A | |
| echo Fail:$?; true | |
| readonly a=A | |
| echo Fail:$?; true | |
| export a=A | |
| echo Fail:$?; true | |
| a=A echo Visible:$? # command still runs | |
| unset a | |
| echo Fail:$?; true |