#!/fellow/monks.pl

I would like to execute another application from within Perl. Using the system() and back ticks works ok if it's a one time run, but what if it's a constant running application, giving me output all the time?

I want to execute a program and parse the output of that program line by line. My piece of code I have here doesn't work so well. The program executes, but it never returns the output, possibly because it's waiting for the program to terminate before doing so, unfortunatly, that's not what I want. I want to get the output line by line in my foreach loop for parsing. Any suggestions?

I appreciate any Perl's of Wisdom the monks can send my way.

open(READ, "-|", "someoscommand.exe"); foreach $a (<READ>) { chomp($a); print "==> $a\n"; } close READ;

In reply to OS command execution by Massyn

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.