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When I use sudo command and pipe it to another command, e.g.

sudo dnf search foo | grep bar

there is a prompt requiring to enter the password. Following this answer, sudo directly accesses the terminal to prompt the password.

But I found that there are some programs which prevent that, for example ripgrep, when I type:

sudo dnf search foo | rg bar

there is no prompt for password, it's just blocked there.

How can this happen?

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