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I have been trying to pipe random data into a program that is suppose to predict the next correct number. I want to run a infinite loop pipe for option 1 which leads to option 2 with another option with c to continue. The reason for this is for the AI to be trained in predicting patterns found in random generated numbers.

NOTE: When, I say option 1 and option 2 i mean by selecting option 1 it will display the following options "enter number 1 and enter number 2.

This is what the program looks like in the shell. 

Select your choice.

1. Enter the newest number.

2. Find a new number.


-------------------------------------------------------------------

Select your choice.

1. Enter the newest number.

2. Find a new number.


 Enter number 1. 

 Enter number 2. 

 Enter c to continue or 0 to quite

Pipes that I tried to get to work, but failed.

./RNGAI | echo "1" | shuf -i 1-26 -n1 | echo "2" | shuf -i 1-26 -n1 | echo "c" | ./RNGAI
./RNGAI | echo "1" | echo $((RANDOM%10))| ./RNGAI & echo "2" | echo $((RANDOM%10)) & echo "c"

I have an error after trying some pipes. The pipes do technically work, however the RNGAI program throws errors show -nan every time it runs its loop with the pipe. Here are the pipes and scripts I tried to run

while true
do
echo 1
echo $ od -A n -N 2 -t u2  /dev/random
echo 2
echo $ od -A n -N 2 -t u2  /dev/random
echo c
done | ./RNGAI

Here are the pipes

 while :; do printf "%s\n" 1  seq 1 26 | sort -R | head -n 1 2  seq 1 26     | sort -R | head -n 1 c; done | ./RNGAI
 while :; do printf "%s\n" 1 od -A n -N 2 -t u2  /dev/random 2 $od -A n -N 2 -t u2  /dev/random c; done | ./RNGAI
 while :; do printf "%s\n" 1 shuf -i 1-26 -n1 2 shuf -i 1-26 -n1 c; done | ./RNGAI

Error the RNGAI program throws

   Select your choice.

   1. Enter the newest number.

   2. Find a new number.

      Enter number 1. 
      Enter number 2. 
      -nan
      -nan
       Enter c to continue or 0 to quite 
       Enter number 1. 
       Enter number 2. 
       -nan
       -nan
Travis Wells
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    Good luck on the mission of "predicting patterns found in random generated numbers."! – Jeff Schaller Jun 21 '17 at 09:59
  • @JeffSchaller if the source is a pseudo-RNG, it's actually a good exercise. That's the reason why [cryptographically secure RNGs are so important](https://stackoverflow.com/q/2449594/2072269) - all pseudo-RNGs become predictable given a sufficiently long history. – muru Jun 21 '17 at 12:43
  • This might be useful in cracking encryption. – Travis Wells Jun 21 '17 at 12:52
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    Possible duplicate of [How do I redirect output to cd?](https://unix.stackexchange.com/questions/4048/how-do-i-redirect-output-to-cd) – muru Jun 22 '17 at 04:24
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    Your pipes are meaningless. If you want to use the output of a command as argument to another command, use command substitution. See linked post. – muru Jun 22 '17 at 04:24

1 Answers1

3

I think you're looking for this:

while true
do
    echo 1
    echo $((RANDOM % 10))
    echo 2
    echo $((RANDOM % 10))
    echo c
done | ./RNGAI

Or more concisely:

while :; do printf "%s\n" 1 $((RANDOM % 10)) 2 $((RANDOM % 10)) c; done | ./RNGAI

You want to pipe data into a program, then the input comes before the pipe:

<source of input> | <command that uses the input>
muru
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  • The pipes work, but the program is throwing errors. It says -nan every time when it is in loop. I even tried different commands to generate random numbers. Here is an example of what I tried to run in a script. while true do echo 1 echo $ od -A n -N 2 -t u2 /dev/random echo 2 echo $ od -A n -N 2 -t u2 /dev/random echo c done | ./RNGAI – Travis Wells Jun 21 '17 at 12:16
  • @TravisWells edit the question to include the actual code – muru Jun 21 '17 at 12:23