Transfering data between two programs

[crucifix]

Hi
Do you know how I can transfer data between the two programs in C++?
Shell:

chmod +x program1
chmod +x program2
program1 | program2

char data = "q";

In code program1:

cout << data;

In code program2:

cin >> data;

Is this the way will be sent to a variable of type char ?

 

[SirDice]

It's called InterProcess Communication or IPC for short. And there are various techniques you can use to achive it. The developer's handbook shows how to do this using sockets. But it can also be done with (temporary) files or by using shared memory.

Developers Handbook: Part II. Interprocess Communication

 

[crucifix]

I want to transfer data between the two programs using the stream.
How do I program in C?

 

[freethread]

In C++, Boost has a good library for IPC: http://www.boost.org/doc/libs/1_55_0/doc/html/interprocess.html. In C one method is to use memory mapped files, see mmap(), but as @SirDice said, there are many techniques. Anyhow, reading the Boost.Interprocess documentation you can learn about some of those techniques.

 

[crucifix]

Try it. May allowed the transfers in between two active processes Thanks

 

[ghii]

Hi
Do you know how I can transfer data between the two programs in C++?
Shell:

chmod +x program1
chmod +x program2
program1 | program2

char data = "q";

In code program1:

cout << data;

In code program2:

cin >> data;

Is this the way will be sent to a variable of type char ?

I think it's OK as std::cout and std::cin have the same effect with echo and read. Pipe can be used for both.

 

[worldi]

If one is interested in interprocess communications I'd highly recommend getting a copy of Mr. Stevens' UNIX Network Programming, Volume 2.