ennuikiller:

Since the OP waived the security argument, I don't think that the AM was referring to security problems. Just the normal problems of differing shells doing different string munging before executing stuff is hairy enough. Depending on the shell, you'll have a different sequence of flaming hoops to leap through to ensure that your quotes, ampersands, exclamation marks, question marks, asterisks, etc. make it to the command rather than being intercepted and interpreted by a shell.

If you don't know which shell your user is going to use, it can be challenging to come up with an appropriate string to put within your backticks.

...roboticus

Update: ...and then after hitting the "create" button, I see the "security risk" in parens in the AM post. Sorry ennuikiller...


In reply to Re^3: Best way to call external os command by roboticus
in thread Best way to call external os command by ennuikiller

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.