I am a beginner in perl. Just wanted to understand the following code.
sub get_files {
foreach my $customer (keys %customers){
lg("Getting files from ftp for customer $customer", "LOG");
my $ftp_server = $customers{$customer}{'FtpServer'};
my $ftp_user = $customers{$customer}{'FtpUser'};
my $ftp_pass = $customers{$customer}{'FtpPass'};
my $datadir = $datafiles.$customer."/";
`$get_files $ftp_server $ftp_user $ftp_pass $datadir`;
}
}
What does last line in the above subroutine tells?
It invokes the command that's in the string $get_files, passing the command the remaining strings as parameters.
Usually it's used if you want to capture the resulting output and store it in a variable. In this case where the result is being discarded it would be more usual to use system instead:
system $get_files, $ftp_server, $ftp_user, $ftp_pass, $datadir;
although if the command does then produce any output it'll appear on-screen instead of being absorbed by the back-ticks operator.
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