<p>I assumed you wished rpm --erase to function.</p>
<p>The important part of the error message is correct even if errno is incorrect when stdin is redirected.</p>
<p>FWIW, I can't think of any rpm mode that actually reads from stdin (passwords are read using getpass(3)).</p>
<p>Meanwhile errno is (likely) being reset by isatty(3) trying to detect whether to colorize output.</p>

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