hi, i've been researching on this topic for quite some time, i really need help because i don't realy understand the concept of open2. what i'm trying to do is that from windows, i need to connect to linux and do a few things then exit out and back to the perl script then i'll evaluate the output from linux. To fit this purpose easily, i found plink.exe from makers of putty. however, i can't seem to retrieve the output. 
#!perl
use IPC::Open2;

my $command = 'plink -ssh -pw password_here username_here@host_name_he
+re -batch exit';

    print open2(\*CIN, \*COUT, $command); 
    close COUT;
    
    my $xs = <CIN>;
    
    print "the output is :".$xs;
    
    close CIN;

[download]
my $xs is always empty regardless. To test, i purposely put a fake username and password and i need to obtain the string 'Access denied'. However, my $xs is empty. let's say im running it from cmd prompt and i get this: 
perl test.pl
Access denied
3516the output is :

[download]

In reply to assign open2 output to variable by adrivez

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.