How can I use panda to interact with a program.

[ghost]

Let's take this program as an example.

#include <stdio.h>

int main(int argc, char const *argv[])
{
   setbuf(stdin,0);
   setbuf(stdout,0);

   char buf[0x100];
   printf("Your input:");
   read(0,buf,0x10);
   printf("Your input is:%s",buf);
   return 0;
}

When I copy it to a virtual machine using panda.copy_to_guest() and run the program using panda.interact(), I can't interact with it for any input-output.

[lacraig2]

Hello!

Can you show an example of how you're calling panda.interact()?

In the interim I think an example that may help you is: https://github.com/panda-re/panda/blob/5472db214f56d0696694b416a1ebdcbaba8fa482/panda/plugins/signal/test/run.py#L42

[ghost]

panda = Panda(generic='x86_64_ubuntu_1804')
@panda.queue_blocking
def run_cmd():
    panda.revert_sync("root")
    panda.copy_to_guest("test")
    panda.interact()
panda.run()

PANDA: entering interactive mode. Type pandaquit to exit
root@ubuntu:.*# ls
test  test.ro
root@ubuntu:.*# file test
test: directory
root@ubuntu:.*# file test/test
test/test: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/l, for GNU/Linux 3.2.0, BuildID[sha1]=1e16c3e5c9b3b168bac41d2c71638734782d9868, not stripped
root@ubuntu:.*# ./test/test
aaaaaa

There is no output from the program, and no response to input.

[AndrewFasano]

PyPANDA's interactive mode isn't something we've used too much, I honestly forgot it even existed. I think we only ever tested it with very basic shell interactions so there's a good chance there are issues if your program is printing output without newlines or trying to receive input one byte at a time. If you want to try fixing it, feel free. Otherwise, I'd recommend just taking recording of you interacting with the program using the panda cli or $(python -m pandare.qcows x86_64_ubuntu_1804) then analyzing that.