mirror of
https://https.git.savannah.gnu.org/git/bash.git
synced 2026-06-22 21:37:58 +02:00
Chet Ramey
87 lines
1.3 KiB
Plaintext
87 lines
1.3 KiB
Plaintext
# change behavior of shell builtins to extend assoc_expand_once to indexed
|
|
# arrays
|
|
|
|
export subscript='$(echo INJECTION! >&2 ; echo 0)'
|
|
shopt -s array_expand_once
|
|
|
|
printf -v a["$subscript"] %s hi
|
|
declare -p a
|
|
unset a
|
|
|
|
printf -v "a[$subscript]" %s hi
|
|
declare -p a
|
|
|
|
a[0]=hi
|
|
|
|
unset a["$subscript"]
|
|
declare -p a
|
|
|
|
unset a
|
|
|
|
unset a["$subscript"]
|
|
declare -p a
|
|
|
|
unset -v a
|
|
read a["$subscript"] <<<hi
|
|
declare -p a
|
|
|
|
declare -a a
|
|
read a["$subscript"] <<<hi
|
|
declare -p a
|
|
|
|
unset -v a
|
|
|
|
declare -a a
|
|
|
|
{ sleep 1; exit 12; } & bgpid=$!
|
|
wait -n -p a["$subscript"] $bgpid
|
|
|
|
declare -p a
|
|
|
|
unset -v a
|
|
declare -a a
|
|
|
|
declare -i a["$subscript"]=42
|
|
declare -p a
|
|
|
|
# this still won't work because the quotes prevent it from being recognized as
|
|
# an assignment statement
|
|
#declare -i "a[$subscript]"=42
|
|
#declare -p a
|
|
|
|
test -v a["$subscript"] && echo set
|
|
[ -v a["$subscript"] ] && echo set
|
|
|
|
let a["$subscript"]+=1
|
|
unset -v a
|
|
|
|
# these are all already arithmetic expression errors
|
|
|
|
declare -a a
|
|
|
|
(( a[$subscript]++ ))
|
|
declare -p a
|
|
: $(( a[$subscript]++ ))
|
|
declare -p a
|
|
|
|
a[$subscript]=hi
|
|
declare -p a
|
|
|
|
# length shortcuts for unset variables, so give it a value
|
|
a[0]=zero
|
|
echo ${#a[$subscript]}
|
|
|
|
unset -v a
|
|
|
|
# compound assignments should not perform double expansion
|
|
|
|
a=( [$subscript]=hi )
|
|
declare -p a
|
|
|
|
declare -a a
|
|
a=( [$subscript]=hi )
|
|
declare -p a
|
|
|
|
unset -v a
|
|
|