I understand that you have pretty much already solved your own problem - but just as an alternative, have you considered using Net::Traceroute?

Timeouts would be taken care of for you, and your code could be significantly simplified. Here is a short example script to illustrate, that does basically the same as your get_traceroute sub. 

#!/usr/bin/perl -wl
use strict;
use Net::Traceroute;

my $host = shift;

my $trace = get_trace($host,3,30);
print $trace->{_text_accumulator} and exit;

sub get_trace {
    my ($host, $query_timeout, $timeout) = @_;

    my $trace = Net::Traceroute->new(
        host           => $host,
        query_timeout  => $query_timeout,
        timeout        => $timeout,
        );

    return $trace;
}

[download]

Hope this helps,
Darren :)

In reply to Re: Timing out a traceroute by McDarren
in thread Timing out a traceroute by vancetech

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.