System variables in MailScanner.conf

[Lars Kristiansen]

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>>> Looks like it's a FreeBSD thing as my FreeBSD boxes (5.3 & 5.4) all
>>> like
>>> $HOST and 'Undefined Variable' $HOSTNAME
>>
>
> Actually, just took a look at 'man bash', it says "HOSTNAME" automatically
> set to the name of the current host. :-)
>
> Chen

And something similar is mentioned for "HOST" in 'man tcsh'.
csh (actually tcsh) is default root shell in freebsd if that was not clear.

And by the way, if HOSTNAME is set in /root/.cshrc,
 "echo ${HOST}${HOSTNAME}" will return hostname twice, at least in terminal.
If not set it will only return this error message:
 "HOSTNAME: Undefined variable." instead of any output at all.
Not tested if output is different if not called from a terminal, though.

--
Hilsen from Lars


>
>> Maybe HOSTNAME is set by the shell, works in bash.
>> A grep for HOSTNAME returns among others these:
>> /etc/profile:
>> HOSTNAME=`/bin/hostname`; export HOSTNAME
>>
>> So you I guess you would have to put in
>> /etc/csh.login or in ~/.cshrc
>> setenv HOSTNAME `/bin/hostname`
>>
>>
>> --
>> Med vennlig hilsen
>> Lars Kristiansen
>>
>> A D V E N T U R A S
>> Tlf: 22 20 59 90
>> Fax: 22 20 59 91
>> lars at adventuras.no
>> http://www.adventuras.no
>>
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>
>
> ===========================================
> Yu Chen
> Howard Hughes Medical Institute
> Chemistry Building, Rm 182
> University of Maryland at Baltimore County
> 1000 Hilltop Circle
> Baltimore, MD 21250
>
> phone: 	(410)455-6347 (primary)
>  	(410)455-2718 (secondary)
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> email: 	chen at hhmi.umbc.edu
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