How to get a fqn hostname

Werner Modenbach modenbach at alc.de
Mon Oct 8 14:07:10 BST 2001


On Montag, 8. Oktober 2001 14:12 Jan H. Schrewe wrote / Am Montag, 8. Oktober 
2001 14:12 schrieb Jan H. Schrewe:
> Werner Modenbach wrote:
> > On Montag, 8. Oktober 2001 13:15 Jan H. Schrewe wrote / Am Montag, 8.
> > Oktober
> >
> > 2001 13:15 schrieb Jan H. Schrewe:
> >>Werner Modenbach wrote:
> >>>First of all sorry for the OT question.
> >>>
> >>>In programming a server using Qt classes I need to know the
> >>>fqn hostname of the system.
> >>>The QSocket method address() allways returns "0.0.0.0".
> >>>Going to gethostname(...) and getdomainname(...) delivers domainname "".
> >>>uname(...) also returns an empty domainname.
> >>>
> >>>Any hints? I've no idea where else to look for a solution.
> >>>
> >>>Thanks.
> >>>
> >>>- Werner -
> >>
> >>try gethostbyname(3) the function is called gethostbyaddress. I don't
> >>really know if this is the fqdn but it should be a starting point
> >
> > For this to work I need to know the numerical address which I also don't
> > have.
> >
> > - Werner -
>
> OK,
>
> the man-page of dnsdomainname (a shell command) says:
>
> "Technically: The FQDN is the name gethostbyname(2) returns
> for the host name returned  by  gethostname(2).   The  DNS
> domain name is the part after the first dot."
>
> I don't know if gethostname(...) returns works for you, but this does sound
> like it shuold work (although never tried it :-)
>
My fqn is "werner.alc.de"
gethostname(...)   gives "werner"
getdomainname(...) gives ""
The shell command 'dnsdomainname' gives "alc.de" but there is no library 
function like that.

- Werner - 

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