I have a program where I need to pass a filename (and location) to the program. How can I do this? I have read the GetOpt doc so please don't point me there. My command line is as follows:
perl myprogram.pl -input C:\inputfilelocation -output C:\outputfilelocation
My GetOptions look like this:
GetOptions('input=s' => \$input,'output=s' => \$output);
Basically I need to figure out how to access that file in a while loop that I have which iterates over the lines in the file and puts each into $_
while ($input) {
...doesn't work. Note that before my file worked fine with:
open my $error_fh, '<', 'error_log';
while (<$error_fh>) {
This works for me. Your GetOptions seems correct. Open file and read from the filehandle, and don't forget to check for errors:
use warnings;
use strict;
use Getopt::Long;
my ($input, $output);
GetOptions('input=s' => \$input,'output=s' => \$output) or die;
open my $fh, '<', $input or die;
while ( <$fh> ) {
## Process file.
}