[syslog-ng]log files showing short name.

[Balazs Scheidler]

On Fri, Feb 15, 2002 at 09:05:45AM -0500, Yan Lau wrote:
> Hello,
> 
> 
> I am using syslog-ng 1.5.14.  I am trying to get the log messages to display the
> full hostname instead of the short name.
> 
> For instance,
> 
> Feb  4 10:06:42 mailhost su: 'su toto' succeeded for ylau on /dev/pts/0
> 
> We have several servers with the name "mailhost" so I would like it to show
> mailhost.nyc1.globix.net so I can tell which one it is.
> 
> 
> Here are the options I have set:
> 
> options { sync (0);
>           time_reopen (10);
>           log_fifo_size (1000);
>           create_dirs (yes);
>           chain_hostnames (no);
>           use_dns (no);
>           use_fqdn (yes);
>         };
> 
> 
> Where is it picking up the short name and how can I get it to show the full
> name?  Sometimes the log shows IP addresses, that is OK.

hmm. if keep_hostname is true, it should not touch the hostname, if it is
false, the hostname should always be rewritten.         

if (!self->keep_hostname || !logmsg->host) {
	... rewrite host ...
}

Thus, if keep_hostname() is false (default), the hostname is always rewritten.

Ops, I think I have the problem. get_source_hostname() function in
sources.c:

if (... received from network ...) {
	... resolve source ip, chomp domain if use_fqdn is false ...
}
else {
	... this message is local ...
	getshorthostname(), even if use_fqdn() is true.
}

thus the hostname you are picking up comes from a local message. Try this
patch:

diff -u -r1.28 sources.c
--- sources.c	2001/03/30 15:02:31	1.28
+++ sources.c	2002/02/15 14:34:00
@@ -184,7 +184,14 @@
 	else {
 		if (!hostname) {
 			char buf[128];
-			hostname = c_format_cstring("%z", getshorthostname(buf, sizeof(buf)));
+			if (usefqdn) {
+				gethostname(buf, sizeof(buf) - 1);
+				buf[127] = 0;
+			}
+			else {
+				getshorthostname(buf, sizeof(buf));
+			}
+			hostname = c_format_cstring("%z", buf);
 		}
 
 		ol_string_use(hostname);

-- 
Bazsi
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