busybox/shell/hush_test/hush-vars/readonly0.tests
Denys Vlasenko 38ef39a1ab hush: add readonly testcase, fix fallout
function                                             old     new   delta
helper_export_local                                  185     214     +29
run_pipe                                            1549    1560     +11
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(add/remove: 0/0 grow/shrink: 2/0 up/down: 40/0)               Total: 40 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18 01:40:01 +02:00

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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