#!/usr/bin/perl -w

use strict;
use Fcntl ':flock';

sub add {
  open FH, ">>$file" or die "Cant open config file $!\n";
  flock(FH,LOCK_EX);
  print FH "zone \"$formdata{domain}\" in \{\n\ttype slave\;\n\tfile\"$client\/db.$formdata{domain}\"\;\n\tallow-query \{ any\; \}\; \}\;\n\n";
  close FH;
}


##</code><code>##

#!/usr/bin/perl -w

use strict;
use Fcntl ':flock';

sub add {
  open FH, ">>$file" or die "Cant open config file $!\n";
  lock_file(*FH, LOCK_EX);
  print FH "zone \"$formdata{domain}\" in \{\n\ttype slave\;\n\tfile\"$client\/db.$formdata{domain}\"\;\n\tallow-query \{ any\; \}\; \}\;\n\n";
  close FH;
}

sub lock_file {
   local *FH = shift;
   my $lock = shift;
   my $count = 0;
   my $timeout = 15;
   until (flock FH, $lock) {
       sleep 1;
       die "Can't get lock\n" if ++$count > $timeout;
   }
}