Simulating echo input with GDB

Question

So I am trying to debug a program which requires the user to input some text through the terminal:

$ echo 'here is the text' | ./program

How do I simulate that input in GDB?

Possible duplicate of [How to load program reading stdin and taking parameters in gdb?](http://stackoverflow.com/questions/455544/how-to-load-program-reading-stdin-and-taking-parameters-in-gdb) — Ciro Santilli OurBigBook.com, Apr 23 '17 at 08:49

score 6 · Accepted Answer · answered Nov 10 '13 at 01:03

6

You can run the program with input redirected:

echo 'here is the text' > intput.txt
gdb ./program
(gdb) run < intput.txt

answered Nov 10 '13 at 01:03

Employed Russian

Thanks, I thought that could be the solution. Thanks. – imre Nov 10 '13 at 14:25

score -1 · Answer 2 · answered Nov 09 '13 at 21:13

-1

You can do using --args option giving program executable followed by arguments as below,

 % gdb --args ./program arg1 arg2

answered Nov 09 '13 at 21:13

Sunil Bojanapally

So I replace --args with 'here is the text'? Or where does the text go? – imre Nov 09 '13 at 21:25
@Foxxy - arguments should go after your program i.e arg1 and if multiple arguments followed by. – Sunil Bojanapally Nov 09 '13 at 21:29
But I'm not talking about arguments here, I'm talking about the STDIN. Hence the 'here is the text' part of the prompt. – imre Nov 09 '13 at 21:32

2 Answers2