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namerefs and environment variable names with subscripts
From: |
Grisha Levit |
Subject: |
namerefs and environment variable names with subscripts |
Date: |
Tue, 17 Jul 2018 16:44:07 -0400 |
The following commands:
declare -n r=v[0]
v=(X); r=Y
declare -p ${!v*}
printf "%s: <%s>\n" "r" "$r" "v" "$v"
Will normally produce the following output:
declare -a v=([0]="Y")
r: <Y>
v: <Y>
However, if we start bash with `v[0]' already in the environment, such as with:
env 'v[0]=' $BASH
The behavior changes, and the output is:
declare -a v=([0]="X")
declare -x v[0]="Y"
r: <Y>
v: <X>
I would expect namerefs to ignore any variables with the literal name
`v[0]' in the environment rather than follow them.
- namerefs and environment variable names with subscripts,
Grisha Levit <=