title: How to make radare2 accept hex input
body: <p>I am currently debugging a C program in radare2 called "test", and I was wondering if there is any way for me to send in hex characters as input through radare2. What I mean by this is that when you're running something outside radare2, you could do easily something like this to send hex values as input into an executable:</p>
  
  <pre><code>$ python -c "print('\x42\x97\x53\x8e\x46\x56')" | ./test
  </code></pre>
  
  <p>But when I opened the file in debug mode in radare2 and tried to input hex values into my program, it didn't treat the characters starting with "\x" as hex characters and instead saw each character as an actual ascii input character. Is it possible for me to replicate the above command inside radare2?</p>