PERL CGI Beginners - Problem with open2 in CGI script only

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Problem with open2 in CGI script only

Jennifer I. Drake

2006-10-23, 6:55 pm

Hello,

I am using open2 to write and read to R. This works correctly when run
from the command line, but not when part of the CGI script. Does
anyone have any ideas what might be causing this?

Thanks,
Jennifer

Here is a sample of the script I am running:

#!/usr/bin/perl

use warnings;
use strict;
use IPC::Open2;
use CGI qw/:all :html3 -nph/;
use CGI::Carp qw(fatalsToBrowser);
use DBI;
use GD;

my $outfile = "Rtestout.txt";

my $Rstring = "x<-27\n
x";

my $pid = open2(*READ_R, *WRITE_R, 'R', '--slave', '--silent',
'--vanilla');

open (OUT, ">$outfile") or die "Cannot open outfile: $!\n";

print WRITE_R "
$Rstring
q('no')
";

while (my $line = <READ_R> ) {
print OUT $line;
}

close (OUT);
close (READ_R);
close (WRITE_R);

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