You still don't tell us what you see and how your script fails. "Not getting output" can mean various things. Do you see an 500 error? Do you get another error page? Does the request return a blank page? Does the request never return or time out?

What steps did you undertake to adress the points I mentioned in my first reply?

Now, if you tell us how it's not working, what the error message is, and what you find in the webserver error log, we can maybe help you better.

Be aware that your webserver likely runs your CGI not as your shell user and hence will not have the same permissions as your shell user. Especially, your ~/.ssh2/ directory may or may not be readable to that user, so your passwordless keys for the remote machine won't work.

You don't seem to be checking whether your call to open succeeds. I recommend that you rewrite it as:

my $commandline = "ssh $USER\@$HOST /bin/ping  -s $nodeName 64 10 |";
open PING, $commandline
    or die "Couldn't launch '$commandline': $!/$?";

[download]

As another aside, you want to ditch your hand-rolled CGI parser and use CGI instead, which comes with every Perl and has been thoroughly tested.

In reply to Re^5: Shell to Perl conversion by Corion
in thread Shell to Perl conversion by rockmountain

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.