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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
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# arrays
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export subscript='$(echo INJECTION! >&2 ; echo 0)'
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shopt -s array_expand_once
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printf -v a["$subscript"] %s hi
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declare -p a
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unset a
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printf -v "a[$subscript]" %s hi
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declare -p a
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a[0]=hi
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unset a["$subscript"]
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declare -p a
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unset a
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unset a["$subscript"]
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declare -p a
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unset -v a
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read a["$subscript"] <<<hi
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declare -p a
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declare -a a
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read a["$subscript"] <<<hi
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declare -p a
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unset -v a
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declare -a a
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{ sleep 1; exit 12; } & bgpid=$!
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wait -n -p a["$subscript"] $bgpid
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declare -p a
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unset -v a
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declare -a a
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declare -i a["$subscript"]=42
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declare -p a
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# this still won't work because the quotes prevent it from being recognized as
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# an assignment statement
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#declare -i "a[$subscript]"=42
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#declare -p a
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test -v a["$subscript"] && echo set
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[ -v a["$subscript"] ] && echo set
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let a["$subscript"]+=1
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unset -v a
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# these are all already arithmetic expression errors
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declare -a a
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(( a[$subscript]++ ))
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declare -p a
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: $(( a[$subscript]++ ))
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declare -p a
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a[$subscript]=hi
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declare -p a
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# length shortcuts for unset variables, so give it a value
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a[0]=zero
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echo ${#a[$subscript]}
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unset -v a
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# compound assignments should not perform double expansion
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a=( [$subscript]=hi )
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declare -p a
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declare -a a
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a=( [$subscript]=hi )
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declare -p a
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unset -v a
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