I have come here to ask for your guidance.

I tried searches on line and even tried joining the mailing list for emperl embperl-subscribe@perl.apache.org I don't think it is available anymore.

I have a sample program in 2 formats perl & embperl

The perl version works as a CGI but the embperl version does not work.

Any suggestions or pointers to solutions would be appreciated

OS: Linux version 2.6.35.6-48.fc14.i686.PAE (...) (gcc version 4.5.1 20100924 (Red Hat 4.5.1-4) (GCC) ) #1 SMP Fri Oct 22 15:27:53 UTC 2010

perl working script

#!/usr/bin/perl
use warnings;
use strict;
use IPC::Open3;
use Symbol 'gensym'; 

print "Content-type: text/plain\n\n";

my $cmd = 'ls';

my $pid = open3(*HIS_IN, *HIS_OUT, *HIS_ERR, $cmd);
close(HIS_IN);  # give end of file to kid, or feed him
my @outlines = <HIS_OUT>;              # read till EOF
my @errlines = <HIS_ERR>;              # XXX: block potential if massi
+ve
print "STDOUT: ", @outlines, "\n";
print "STDERR: ", @errlines, "\n";

waitpid( $pid, 0 );
my $child_exit_status = $? >> 8;

print "child_exit_status: $child_exit_status\n";

[download]

embperl non-working script

Here is the output I receive.
STDERR: ls: write error: Bad file descriptor

child_exit_status: 2
 
[-
use warnings;
use strict;
use IPC::Open3;
use Symbol 'gensym'; 

$escmode = 0;
$http_headers_out{'Content-Type'} = "text/plain";

my $cmd = 'ls';

my $pid = open3(*HIS_IN, *HIS_OUT, *HIS_ERR, $cmd);

close(HIS_IN);  # give end of file to kid, or feed him

my @outlines = <HIS_OUT>;              # read till EOF
my @errlines = <HIS_ERR>;              # XXX: block potential if massi
+ve
print OUT "STDOUT: ", @outlines, "\n";
print OUT "STDERR: ", @errlines, "\n";

waitpid( $pid, 0 );
my $child_exit_status = $? >> 8;

print OUT "child_exit_status: $child_exit_status\n";
-]

[download]

In reply to perl / embperl -- IPC::Open3; by djlerman

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.