topic HOST in perl in Operating System - Linux

HOST in perl

Peter Brimacombe — Thu, 06 Mar 2008 17:02:14 GMT

thanks to H Merijn Brand for his answer to
the thread
displaying hostname on xterm window titlebar
June 6 2005

tinyurl is not allowed :(

Here is the code I put in .kshrc
HOST=$HOST; export HOST
perl -le'print "\e]0;$ENV{HOST}\7"'

from perl I printed out %ENV but HOST was not there so I added the HOST=$HOST line above it

why do I need to explicity set HOST on HP-UX?

Re: HOST in perl

James R. Ferguson — Thu, 06 Mar 2008 17:26:03 GMT

Hi Peter:

You are declaring and exporting the variable (and its value) called "HOST" to the running environment. THen, and only then, does Perl find it.

I would expect that the declaration and export might look like:

# HOST=$(hostname); export HOST

...or:

# HOST=servername; export HOST

If you want to see all the variables and their values in your environment, do:

perl -le 'for $key (keys %ENV) {print "$key => $ENV{$key}"}'

Regards!

...JRF...

Re: HOST in perl

H.Merijn Brand (procura — Thu, 06 Mar 2008 17:42:44 GMT

> HOST=$HOST; export HOST

Here you assign the value of $HOST to $HOST, which is a no-op

if $HOST is not set in your shell (I use the tcsh), you better do it like

export HOST=`hostname`
or
export HOST=$(hostname)

or something similar, there are so many ways to do that

> perl -le'print "\e]0;$ENV{HOST}\7"'

maybe you have another variable that reflects your hostname?

Enjoy, Have FUN! H.Merijn