Hi I'm try in to check a number of ports against the etc/services file.

I have created an array of various ports 

@myports qw( 21 22 23)

open SERVICES_FILE, "<", "/etc/services" or die $!;


foreach my $port (@myports) 
                 {
                 print $port;
                 }
                 while (my @lines = <SERVICES_FILE>)
                  {
                  for my $line (@lines){
                  if ( my $port =~ m/$line/ ) {
                  print "Match Found:  $line";
                 }
                 }
                 }
           }

[download]

But Im getting errors

Use of uninitialized value $port in pattern match (m//) at ./get_services.pl line 48, <SERVICES_FILE> line 10774. Unknown verb pattern '' in regex; marked by <-- HERE in m/exp1 1021/tcp # RFC3692-style Experiment 1 (*) <-- HERE RFC4727 / at ./get_services.pl line 48, <SERVICES_FILE> line 10774.

any pointers for a newbie

In reply to Port check - Services File by deelinux

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