I have a program "execopu -text" that can take input from a file "file.txt" and execute the data inside by doing: execopu -text < file.txt from a Unix command line.

"file.txt" looks like this:
cell
u
csno = 7
ccuoosmin_3g1x = ""
ccuoos_3g1x = ""
u
u
csno = 12
ccuoosmin_3g1x = ""
ccuoos_3g1x = ""
u

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I want to automate the generation of the "file.txt" and execution of the script into one Perl script. How can I modify this script to "<" redirect the output generated by the "print" statements using the same method as the Unix "<" but do this within perl instead? Right now the sript below is having issues using the "open" command. 
#!/usr/bin/perl

my @sitenumbers = (7,12);

open(EXECOPU, '| execopu -text')
or die("Can't run execopu: $!\n");

print EXECOPU "cell\n";

foreach my $site_number (@sitenumbers){

print EXECOPU <<"EOF";
u
csno = $site_number
ccuoosmin_3g1x = ""
ccuoos_3g1x = ""
u
EOF

}

[download]

In reply to Redirect Unix Input Within Perl by awohld

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