which host

From: Werner Winter (werner.winter_at_asamnet.de)
Date: 10/31/03


Date: Fri, 31 Oct 2003 16:28:21 +0100

Hello,
I've setup a linux terminal server. Now I want to know, which user is logged
in on which host . So I wrote a perl-script named "which_host"

# which user
$uid=$<;
$username=(getpwuid)$uid))[0];
$username = $1;

#which host
@last= `/usr/bin/last -n 1 -a $username`;
# line 18
$host= (split (/\s+/, $last[0]))[9];

The last two lines cause an error: Use of uninitialized value in string eq
at /usr/local/bin/which_host line 18

The problem is, that "last" shows only 8 columns, no host in column 9 is
shown. If I change the line
@last= `/usr/bin/last -n 1 -a $username`;
 to
@last= `/usr/bin/last -n 3 -a $username`;
then I get 3 lines and in the third line the host is shown in column 9.

What can I do?

cu
Werner



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