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Seeking help with a curl command in a bash script - SOLVED (lemmy.thewooskeys.com)

submitted 4 weeks ago* (last edited 4 weeks ago) by [email protected] to c/[email protected]

22 comments fedilink hide all child comments

I've got this command in a bash script:

TEST=$(curl -o /dev/null -s -k -w "%{http_code}" -u "${USERNAME}:${PASSWORD}" "${URL}/dashboard/")
echo "${TEST}" #debug

When the script runs, the output is "000".

When I run the same curl command from the shell, the output is "200" (which is correct, since the URL is valid).

I verified that the USERNAME, PASSWORD, and URL vars are being passed to the subshell.

I'd appreciate it if you could point out what I'm doing wrong here. :)

UPDATE: This has been solved.

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[–] [email protected] 1 points 4 weeks ago (11 children)

Exit code 7 means curl couldn't connect to the host, so I would try just curling a URL you know is valid directly, not setting it as an env var, to see what happens then.

[–] [email protected] 1 points 4 weeks ago (9 children)

So I guess the question is why is curl failing from within the subshell?

[–] [email protected] 2 points 4 weeks ago (6 children)

I stumbled on a possible cause, but more background is necessary to explain.

The script actually creates an ssh tunnel (to the Traefik host) and then does the curl. So the code is like:

SSH_CMD="ssh -N -L ${LOCAL_PORT}:127.0.0.1:${REMOTE_PORT} ${REMOTE_USER}@${REMOTE_HOST}"
$SSH_CMD &
SSH_PID=$!
SSH_RESULT=$?

TEST=$(curl -o /dev/null -s -k -w "%{http_code}" -u "${USERNAME}:${PASSWORD}" "${URL}/dashboard/")
echo "${TEST}" #debug

What I learned is that when i run the script, the tunnel is successfully created but the curl fails; but then if I run the script again a second tunnel is created and the curl works fine.

[–] ignoble_stigmas 1 points 4 weeks ago (1 children)

Try to add -f to ssh command

[–] [email protected] 2 points 4 weeks ago (1 children)

That seems to have done it!

Running the ssh -f... instead of ssh.... & seems to work first time and every time.

It makes it so SSH_PID=$! doesn't work, but I used pgrep -f <ssh command> instead.

Thanks!

[–] ignoble_stigmas 1 points 4 weeks ago

You are very welcome! That was the hypothesis, that ssh doesn’t go into background as you want it to, since it works for the second run, but tunnel is there after the first.

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