Re: ifconfig data

[Aneurin Price <aneurin.price@gmail.com>]

On Thu, Feb 19, 2009 at 11:43 AM, Hugo Vanwoerkom <hvw59601@care2.com> wrote:
> Hi,
>
> Ifconfig says:
>
> ...
> ppp0      Link encap:Point-to-Point Protocol
>          inet addr:200.57.201.43  P-t-P:200.57.219.18 Mask:255.255.255.255
> ...
>
> I want that inet addr (200.57.201.43) in a program and I prefer not to run
> the ifconfig command from it and grep it.
>
> Does anyone know where else in the system that information resides?
>
> I installed the net-tools source and looking at ifconfig.c it's not
> immediately obvious.
>

Why don't you want to grep the output of ifconfig?

Maybe this would suit you:
http://www.geekpage.jp/en/programming/linux-network/get-ipaddr.php
(Changing eth0 to ppp0 obviously)

NB. To get that example to work I had to change the includes as follows:
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <unistd.h>

Nye