how to make curl request undisturbed in a bash script?

Question

In a bash script, I want to make a curl request that the user should not disturb.

trap "cleanup" 1 2 3 13 15

TMP_OUT=$(curl -H "Content-Type: application/json" -X POST -d "$DATA" "${HOST}:${PORT}"'/main/store' 2>/dev/null &)
 wait $!
 if [ $? -ne 0 ]
 then
        fatal "Something went wrong connecting to the service."
 fi

How do I make this work when the service doesn't work? The wait returns 0 even when the rc from the curl request is 7 and the script continues, which shouldn't happen.

Answer 1

Try something like this:

TMP="$(mktemp)"

curl ifconfig.co 2>/dev/null >"${TMP}" &

wait $!
echo $?

read MY_IP < "${TMP}"
rm "${TMP}"
unset TMP

echo ${MY_IP}

Fundamentally, you need to keep the interesting process as a direct child of "this" shell.

Here we redirect its output to a temporary file, and ingest it later using read.