Default Gateway in C on Linux

Question

How do you find the default gateway of a routing table using C on Linux?

I don\'t want to issue a call to the shell or read a file. There are ioctls for adding and

Answer 1

I think reading /proc/net/route will be your best bet. Would you consider this a "file"?

The format of /proc/net/route is well-known, and in-memory, so there's no I/O penalty or fear of this changing (i.e. versus reading something from /etc/network/*)