Question

I need help with my regex to grab my host information from this logfile:

Tue Aug 24 10:22:14 2010: test1.colo_lvm:check:INFO:    host=test1.dom.colo.name.com
Tue Aug 24 10:22:14 2010: test1.colo_lvm:check:INFO: "/home/bin64"/admin --user="foo-bar" --password="*****" --host="test1.dom.colo.name.com" --port="9999" --socket="/tmp" variables

My regex is also grabbing the 2nd line to include the hostname in double quotes and other pieces of data on that line, which I am not interested in. The first line is fine only. So, I’m just interested in
test1.dom.colo.name.com and nothing else.

My regex so far is this:

if ($line =~ m/(host=)(.+)/){

Thanks!

Answer 1

It’ll work better if you exclude spaces and quotes from the match:

host=([^\s"]+)

By excluding quotes this will match the host=... in the first line while ignoring the --host="..." in the second line.

Edit: This simple test script works for me on your sample input. What happens if you run this?

#!/usr/bin/env perl

while ($line = <>) {
    if ($line =~ /host=([^\s"]+)/) {
        print "$1\n";
    }
}