I suspect that you want something like:

my ($in,$data);
while( sysread(IN,$in,length($enckey)) ) {
    $data .= $in^$enckey;
}
my @recs = map{ [ split /\t/ ] }split /\n/, $data;
for my $rec_ref(@recs) {
    printf "serv %s\nuser %s\npass %s\n",
        $rec_ref->[0], $rec_ref->[1], $rec_ref->[2];  # NB @$rec_ref i
+s equiv
}
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