On Mon, 6 Jun 2005, Jason Englander wrote:
On Sun, 5 Jun 2005, Damian Menscher wrote:
If you already have it set up properly, please compile/run this program on
your mailserver and tell us what it outputs for your hostname:
This is just a FYI, I don't use clamav-milter, so I don't particularly care
either way...
I'm using a Slackware machine right now.
Here is what I get running hostname:
$ hostname
$ hostname -s
$ hostname -f
$ dnsdomainname
The C code you posted outputs just 'server'.
I won't say what's correct or incorrect, because what's correct in Slack may
not be in Fedora/RedHat, but just that maybe clamav-milter shouldn't handle
-L as it is now.
Interesting results... I'm going to guess that Slackware is incorrect
here, based on the fact that my IRIX machines give the FQDN with
(hostname), they have a hostname -s option for the short name, and they
have no -f option. It seems like Slackware broke with the UNIX
standard, though I suppose we should find someone to test on another
vendor UNIX to be sure.
In any case, it appears the most portable solution is to use
gethostname() to determine your local host name (whether it be
fully-qualified or not) and then use gethostbyname to determine the FQDN
for your local hostname.
Here is code for that. Mind checking it on Slackware? Assuming it
works there (I've confirmed it on RedHat and IRIX) then I propose this
go into clamav-milter.
#include <stdio.h>
#include <unistd.h>
#include <netdb.h>
int main(void) {
char name[100+1];
struct hostent *fqdn;
gethostname(name, 100);
name[100]=0;
fqdn = gethostbyname(name);
printf("%s\n", name);
printf("%s\n", fqdn->h_name);
return 0;
}
The program should print your "hostname" (which may or may not be your
FQDN) and then your "FQDN" (which definitely must be your FQDN).
Damian Menscher
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