How to get environment variables into a bash array?

Question

In bash, how can I get all environment variables into an array variable?

I tried the following:

readarray -d "" env_vars <<< "$(env -0)"

This fails with

-bash: warning: command substitution: ignored null byte in input

Note that an environment variable may contain a multi-line string. Therefore splitting on EOL does not give the desired result.

KamilCuk · Accepted Answer · 2022-11-24 19:43:32Z

3

$(...) expands to a string, and strings can't have zero bytes.

Do not use <<<$(...), when you can use < <(...).

readarray -d "" env_vars < <(env -0)

answered Nov 24, 2022 at 19:43

KamilCuk

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2 Comments

./start.sh: line 7: syntax error: unexpected redirection shucks

@DeanHiller You are not using bash.