[Gdb] How can I connect to gdb/mi?

[SirVlad]

Hello!
I am working at a program that should invoke gdb and manage it, make it run 
some commands and should store the results (which I hope to obtain via gdb/mi) 
in its data structures.
How can I connect to GDB/MI?
I do
...
fork();
//and then, in the daughter process,
dup2();
execlp(gdb);

But dup2 closes stdin, so I get
~"Hangup detected on fd 0\n"
~"error detected on stdin\n" 

Is there any way to avoid this? Sorry for maybe my question is one of a newbie.
Thank you for reading this.
Cheers,
--
roy.