how to exchange variables between c, perl and shell scripts?

[pd]

Hi!
Can anybody tell how can I exchange variables between c, perl and shell scripts?

For example say I have a code in C (test_return.c) as:
#include<stdio.h>
int main()
{
x=5;
return x;
}

Now I want to access the value of variable x in the shell script.How can I do that?

In the shell script I am running the exe file created from the compiled and build exe from the c code.
E.g. ./test_return.exe
Thanks,
pd

 

[aadvedaboard]

Hello pd,

There are two ways to enable both the shell script and a perl script (they really works for any other kind of programming language with minimal support).

[1] write down the value of the variable into a file (vars.txt, for example) and then open the file with the shell script and read the data (var's value) and do something with it.

[2] if you do know how to use the sockets functionality for C and perl you can exchange data between this to languages through a socket connection (like if they were tied with a pipe) that allows you to send/received data on every separate program.

if you do not know how to do any of this two alternatives, let me know and i can guide you to the corresponding books or links to make it happen.

 

[pd]

Re: how to exchange variables between c, perl and shell scri

Thanks aadvedaboard!
I some how know the 1st option...but not about the second one....
Can you please elaborate with an example?
-pd

 

[vsmGuy]

better try $? and environment vars.

 

[jhbbunch]

I think sockets is the best way. It's like a virtual port. Most languages have hooks into sockets. Setting environment variables would work but it is not very elegant. Environment variables are for important, enduring things like a programs or OS settings and such. I would not want to clutter it up. If you do use environment variables, clean up after yourself (get rid of them when the programs end).

 

[drbizzarow]

you can use text file for this