use strict;
use warnings;

use Data::Dumper;

open my $inFH, q{<}, \ <<EOF or die $!;
type=first a=1 b=2 c=3
type=second d=4 e=5 f=6
type=third g=7 h=8 i=9
EOF

my %hash =
   map {
       my $key = $_->{ type };
       delete $_->{ type };
       ( $key => $_ );
       }
   map { { map { split m{=} } split } }
   <$inFH>;

close$inFH or die $!;

print Data::Dumper
   ->new( [ \ %hash ], [ qw{ *hash } ] )
   ->Sortkeys( 1 )
   ->Dumpxs();