[Techtalk] ip addreses on redhat

[Lena M]

thank you every one for pointing me in the right direction.
I'll take a look at the source code a bit later today.

thank you again

Lena
----- Original Message ----- 
From: "Meredydd" <meredydd at everybuddy.com>
To: "Neil Fryer" <nfryer at marimba.com>; "Lena M" <lena_m1 at hotmail.com>
Cc: <techtalk at linuxchix.org>
Sent: Monday, August 04, 2003 8:08 AM
Subject: Re: [Techtalk] ip addreses on redhat


> (top-posting for consistency)
> 
> That's not actually what Lena was looking for, I don't think. What 
> Lena's looking for are the system calls to retrieve the information 
> from the kernel, which is what ifconfig does. Those config files are 
> used to *set* the IP (or rather, to tell ifconfig to set the IP) - they 
> don't store it on the kernel's behalf.
> 
> The source code to the net-tools applications, which includes ifconfig, 
> is available at http://sites.inka.de/lina/linux/NetTools/
> 
> Meredydd
> 
> On Monday 04 August 2003 15:48, Neil Fryer wrote:
> > Hi All,
> >
> > AFAIK, RedHat gets it's IP addy's from
> > /etc/sysconfig/networking/devices/ifcfg-eth0 on boot up, I could be
> > wrong here, but I'm pretty sure this is where the info is obtained
> > from.
> >
> > Kind regards
> > Neil Fryer
> >
> > Lena M wrote:
> > >Luke,
> > >
> > >That's right. I need to know how ifconfig -a gets ip addresses. I
> > > would like a program that I'm writing to do the same.
> > >
> > >Thank you.
> > >
> > >Lena
> > >
> > >
> > >
> > >----- Original Message -----
> >
> > From: "Luke Woods" <lwoods at netstarnetworks.com>
> >
> > >To: <techtalk at linuxchix.org>
> > >Sent: Monday, August 04, 2003 7:16 AM
> > >Subject: RE: [Techtalk] ip addreses on redhat
> > >
> > >>Hi,
> > >>
> > >>I believe she might be talking about where the address is stored
> > >> after being configured (by ifconfig or the like).
> > >>
> > >>Network interfaces are kernel resident, the applications make
> > >> system calls to change certain parameters of the interface.
> > >>
> > >>
> > >>Quote:
> > >>
> > >>Is the IP address being assigned statically or dynamically?
> > >>
> > >>If it's static, the IP address lives in
> > >>/etc/sysconfig/network-scripts/ifcfg-ethX  where X is the interface
> > >>number.
> > >>
> > >>If the address is being assigned dynamically, then where it's
> > >> stored depends on the dhcp client you're using. The most probable
> > >> location is /var/lib/dhcp, but as I said, that location might vary
> > >> depending on the client. In any case, it will be stored somewhere
> > >> in /var, not /proc
> > >>
> > >>
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>