On Wed, Apr 15, 2009 at 04:20:20PM -0400, devin kelly wrote:
> I've been looking over the GNU Radio code and I can't seem to figure what is
> being done in /usrp2/host/lib/open_usrp2_socket.cc file. Specifically,
> lines 97 through to 128.
>
> What I think is happening is that a pair of connected sockets is created
> (97) then a process is forked (102). So, the child process has it's own
> pair of sockets? Are sockfd[0] in each process connected? That would
> explain why sockfd[1] is closed (114) immediately after the fork, but it
> would not explain the need for socketpair to begin with.
>
> So, my questions are: why is socketpair needed? What is the fork doing?
> And, why is the socket closed right after the fork?
>
> Any help is appreciated.
> Devin
This code allows us to open a SOCK_RAW socket without being root by