Rating:
When we run the program, we are asked to input "Please may I have the flag?".
But when we do, a bunch of garbled text is displayed. As the hint indicates, we
need to split its `stdout` and `stderr` streams.
Let's try redirecting `stderr` to `/dev/null` so that only `stdout` is displayed :
````bash
/problems/in-out-error_2_c33e2a987fbd0f75e78481b14bfd15f4/in-out-error 2>/dev/null <<< "Please may I have the flag?"
````
This is what we get :
```
Thank you for asking so nicely!
We're no strangers to love
You know the rules and so do I
A full commitment's what I'm thinking of
You wouldn't get this from any other guy
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
We've known each other for so long
Your heart's been aching, but
You're too shy to say it
Inside, we both know what's been going on
We know the game and we're gonna play it
And if you ask me how I'm feeling
Don't tell me you're too blind to see
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
(Ooh, give you up)
(Ooh, give you up)
Never gonna give, never gonna give
(Give you up)
Never gonna give, never gonna give
(Give you up)
We've known each other for so long
Your heart's been aching, but
You're too shy to say it
Inside, we both know what's been going on
We know the game and we're gonna play it
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
```
Yep, just got rickrolled. That was the first time, and not the last. So maybe
we need to display `stderr` instead ?
```bash
/problems/in-out-error_2_c33e2a987fbd0f75e78481b14bfd15f4/in-out-error 1>/dev/null <<< "Please may I have the flag?"
```
This time we get :
```
picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}picoCTF{p1p
```
Bingo, our flag is `picoCTF{p1p1ng_1S_4_7h1ng_b6f5a788}`
