Its not trying to execute $cmd. Its wrapping $cmdwith "'s, and then eval'ing. It will return a string with the values interpolated.

Update: ikegami is correct, the way the command is layed out, it will generate an error. I thought ikegami was trying to point out that the command itself wasn't valid perl, not that it was building an invalid string (that is bad perl). The point of the story is that interpolation doesn't run arbitrarily deep, if you want another layer, you'll have to eval, and get all of the problems that go along with it.

In reply to Re^3: problem with string literal in system() by cephas
in thread problem with string literal in system() by cvg2mco

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.