CODEWITHSUNDEEP
bash
Khushil
Khushil

Reputation: 165

Getting bash command output into an array in a shell script

I have the following small script:

#!/usr/bin/env bash

packages_installed=($(apt-cache -q pkgnames | tr - _ | tr . _))

echo $packages_installed

if [ ${#packages_installed[@]} -eq 0 ]; then
    echo "+unable_to_find_list_of_installed_packaged"
    logger -p user.error -t find_installed_packages "$(hostname -f) was unable to determine list of installed packages using apt-cache"
else
    for pkg in "${packages_installed[@]}"
    do
        echo "+installed_package_$pkg"
    done
fi

Running this however prints:

root@olympus:~# sh test.sh
test.sh: 3: test.sh: Syntax error: "(" unexpected

This seems to indicate I've made a mistake on the line where I generate the installed package list. However I'm pretty sure that's how you get a command output into an array?

Feels like I'm missing something dumb.

Upvotes: 0

Views: 142

Answers (1)

devnull
devnull

Reputation: 123458

Feels like I'm missing something dumb.

Indeed.

root@olympus:~# sh test.sh
test.sh: 3: test.sh: Syntax error: "(" unexpected

You are using sh to execute the script that is causing the error. Your script seems fine and the array assignment shouldn't pose any problems.

Execute it using bash instead.

Upvotes: 4

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