I suspect this is a problem with "at" rather than with Perl. 

system("at 17:00 echo \"go home\"");
system("at");
system("at 1 /delete");

[download]
produces: 
Added a new job with job ID = 1
Status ID   Day                     Time          Command Line
----------------------------------------------------------------------
+---------
        1   Next 20                 17:00         echo "go home"

[download]
for me. But I do recall having a hard time getting certain types of quotes to not disappear w/ "at" jobs under WinNT and Perl wasn't creating the jobs.

You could always try: 

system('at 12:00 program ""the.server.org:1234""')

[download]
for increasing numbers of "s until it works.

        - tye (but my friends call me "Tye")

In reply to (tye)Re: Quote marks lost in system() calls by tye
in thread Quote marks lost in system() calls by Three-G

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.