Hey, C! What's my IP?

Doran L. Barton fozz at iodynamics.com
Tue Jan 16 22:56:02 MST 2007

Topher Fischer wrote:
> Is there a "standard" (de facto or otherwise) way of finding a local
> machine's IP address in C?  I've googled about, but I still haven't
> found what I'm looking for.  The only thing I've come up with so far is
> calling gethostbyname on my machine's hostname, but that obviously won't
> work when I leave my home network.
> Any ideas?

Warning: This is completely tongue in cheek. :)

How about this?

fh = popen("/sbin/ifconfig eth0", "r");
/* Then just fread/fgets from fh to find the IP */

Lotta overhead to find the IP, I know. ;-)

fozz at iodynamics.com is Doran L. Barton, president/CTO, Iodynamics LLC
Iodynamics: IT and Web services by Linux/Open Source specialists
 "The Civil War began in 1830. Many soldiers repeatedly gave their lives
  for their country. "
    -- Seen in a school report
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