jq not working with exclamation mark as an input [duplicate]

问题

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Closed 2 years ago.

I am passing username and password to jq the following way:

json=$(jq -n --arg u "user_dev" --arg p "user!" '{username: $u, password: $p}')

However, it is failing and giving the following output:

-bash: !": event not found

It seem that it is not liking exclamation mark with the arg p "user!"

回答1:

The shell is interpreting it as a history expansion. Use single quotes instead to prevent that.

json=$(jq -n --arg u "user_dev" --arg p 'user!' '{username: $u, password: $p}')

That said, bash 4.3 includes a fix to prevent that from happening. From the changelog:

l. The history expansion character (!) does not cause history expansion when followed by the closing quote in a double-quoted string.

来源：https://stackoverflow.com/questions/43987641/jq-not-working-with-exclamation-mark-as-an-input