a quick hack is to remove the single quotes from the heredoc marker. In this way the heredoc contents will be processed by perl and any variables within it will be interpolated (and if you do not have use strict; use warnings; all perl-looking variables - declared in your program or not - will be replaced). However, better than a heredoc is to construct a string with your specifications under your full control, using for example, sprintf(), escaping sigils and single quotes. For example, my $var1 = ...; my $str = "echo '$var1' | awk '{print \$1}'";

See also, Re^2: Ubuntu File Names with spaces and special characters

In reply to Re^3: Heredoc with system call by bliako
in thread Heredoc with system call by curtisb

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.