Hi all ! I can't figure out what is the problem here. I'm trying to do 'sed' like regex replace to files, but, at the same time ask a question if I want it run for the file in question. The problem is that the second time I call the ja_nei() it seems to hang. My guess is that there is some buffer issues that I can't seem to figure out. I've used to run the same code but by calling sed from doSystemCommand - but, I hate having to use sed for something that I should be able to do in perl only. I was hoping to write this without any use of modules.

print "Process \"$change_me\" ? (j/n) : ";

$svar = ja_nei(<>);
if ($svar) {
  fixer( 'anonymous_enable=YES','anonymous_enable=NO',"$change_me" );
  fixer( '#nopriv_user=ftpsecure','nopriv_user=ftpsecure',"$change_me"
+ );
  doSystemCommand("useradd -m ftpsecure -s /bin/bash");
}

## 
# Subs
##

sub ja_nei {
  #chomp( my $input = (<STDIN>) );
  my $input = (<STDIN>);
  if ( $input =~ /^j|^y/i ) {
    return 1;
  }
  else {
    return 0;
  }
}

sub fixer {
  my $pat   = shift;
  my $to    = shift;
  my $file  = shift;
  my $count = 0;
  local $^I = '';
  undef @ARGV;
  push @ARGV, $file;
  while (<>) {
    if (s/$pat/$to/g) {
      $count++;
    }
    print;
  }
  if ( $count == 0 ) {
    say "WARNING : No changes made to file \"$file\"";
  }
  elsif ( ($g_debug) && ($count) ) {
    say "\"$pat\" changed to \"$to\" in \"$file\"";
  }
}

sub doSystemCommand {
  my ($systemCommand) = @_;
  my $returnCode = system($systemCommand );
  if ( $returnCode != 0 ) {
    die "Failed executing [$systemCommand] : $!\n";
  }
  return;
}
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