Script program inputs in bash ubuntu linux

Question

I'm in a course for C++ programming.

Our professor created a linux validation script against which our program output must match exactly.

It's running out of his own program and generates an output.txt file, then compares it against his output file, if it doesn't match it rejects the script.

The problem is, this program excepts probably 150-200 lines of input and if anything goes in wrong you have to start all over again. If you even enter an incorrect char, it must be restarted as the backspace registers as a character of its own.

How might I generate a bash script that would feed all of the input into the program automatically?

NOTE: We have to use his program as in: ~professor.name/submit asigname

Too broad. Need example of input/output or sample source code to narrow down what you need. — Dummy00001, Dec 03 '15 at 09:35
In addition, this is a frequently recurring question. Look for duplicates. — tripleee, Dec 03 '15 at 13:24

score 1 · Answer 1 · answered Dec 02 '15 at 23:44

1

You can create a text file:

answers.txt

answer1
answer2
...
answerN

and use that as stdin for the program:

./your_program < answers.txt

answered Dec 02 '15 at 23:44

hek2mgl

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We are using his program as: ~professor.name/submit assigname – bigcodeszzer Dec 02 '15 at 23:46
Is there a way I can force it to include the script? – bigcodeszzer Dec 02 '15 at 23:46
Well I mean, your command ./your_program < answers.txt – bigcodeszzer Dec 02 '15 at 23:48
His script is probably just grabbing the .cpp and .h files then compiling/running. Is there a way I can force it to include the command? – bigcodeszzer Dec 02 '15 at 23:48
1

?? Just `~professor.name/submit assigname < answers.txt` – hek2mgl Dec 02 '15 at 23:50
It's saying that file is too shortor empty. Is there a special syntax for newline char? I tried asdf\n the ouput was empty. – bigcodeszzer Dec 03 '15 at 00:16
No, just press enter. – hek2mgl Dec 03 '15 at 00:17
I don't think it is accepting it. Output is: Submitter (V0.93 (Backspace allowed in script)) Submitting FP - Milestone 4 g++ -Wall -std=c++0x -o ms4 ms4tester.cpp NonPerishable.cpp Perishable.cpp Date.cpp ErrorMessage.cpp Item.cpp 2> errms4.txt – bigcodeszzer Dec 03 '15 at 00:22
?? I don't get that. Probably your professor wants you to fill in the answers manually.... I'm AFK.. – hek2mgl Dec 03 '15 at 00:24
I think there is a conflict between the submitting program parameters and the < input.txt syntax – bigcodeszzer Dec 03 '15 at 00:44

score 0 · Accepted Answer · answered Dec 03 '15 at 09:33

How might I generate a bash script that would feed all of the input into the program automatically?

Without any example code or input/output, it is hard to gauge what precisely is that you need.

Otherwise, for a generic tool to automate interactive console programs, I would suggest to take a look at the Expect.

Script program inputs in bash ubuntu linux

2 Answers2

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