| 1 |
=head1 NAME |
| 2 |
|
| 3 |
RCU::Irman - RCU interface to libirman. |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use RCU::Irman; |
| 8 |
|
| 9 |
=head1 DESCRIPTION |
| 10 |
|
| 11 |
See L<RCU>. |
| 12 |
|
| 13 |
=over 4 |
| 14 |
|
| 15 |
=cut |
| 16 |
|
| 17 |
package RCU::Irman; |
| 18 |
|
| 19 |
use Carp; |
| 20 |
use Errno (); |
| 21 |
use Fcntl; |
| 22 |
|
| 23 |
use RCU; |
| 24 |
|
| 25 |
use base qw(RCU::Interface); |
| 26 |
|
| 27 |
$VERSION = 0.11; |
| 28 |
|
| 29 |
=item new <path> |
| 30 |
|
| 31 |
Create an interface to the RCU receiver at serial port <path> (default |
| 32 |
from in irman.conf used if omitted). |
| 33 |
|
| 34 |
=cut |
| 35 |
|
| 36 |
sub new { |
| 37 |
my $class = shift; |
| 38 |
my $path = shift; |
| 39 |
my $self = $class->SUPER::new(); |
| 40 |
local (*CW, *CR); |
| 41 |
|
| 42 |
$self->{fh} = local *IRMAN_FH; |
| 43 |
$self->{ifh} = local *IRMAN_IFH; |
| 44 |
|
| 45 |
pipe $self->{fh}, CW or die "unable to create communications pipe"; |
| 46 |
pipe CR, $self->{ifh} or die "unable to create communications pipe"; |
| 47 |
|
| 48 |
$self->{pid} = fork; |
| 49 |
|
| 50 |
if ($self->{pid} == 0) { |
| 51 |
use Config; |
| 52 |
close $self->{ifh}; close $self->{fh}; |
| 53 |
open STDIN, "<&CR"; open STDOUT, ">&CW"; close STDERR; |
| 54 |
fcntl STDIN, F_SETFD, 0; fcntl STDOUT, F_SETFD, 0; |
| 55 |
exec "$Config{installbin}/rcu-irman-helper", "", $path || ""; |
| 56 |
} elsif (!defined $self->{pid}) { |
| 57 |
die; |
| 58 |
} |
| 59 |
close CR; close CW; |
| 60 |
|
| 61 |
$self->get; # wait for I packet |
| 62 |
|
| 63 |
$self; |
| 64 |
} |
| 65 |
|
| 66 |
sub fd { |
| 67 |
fileno $_[0]->{fh}; |
| 68 |
} |
| 69 |
|
| 70 |
sub _get { |
| 71 |
my $self = shift; |
| 72 |
my $fh = $self->{fh}; |
| 73 |
local $/ = "\x00"; |
| 74 |
$! = 0; |
| 75 |
my $code = <$fh>; |
| 76 |
if ("=" eq substr $code, 0, 1) { |
| 77 |
split /\x01/, substr $code, 1, -1; |
| 78 |
} elsif ($code =~ s/^E//) { |
| 79 |
die substr $code, 0, -1; |
| 80 |
} elsif ($code =~ /^I/) { |
| 81 |
# NOP |
| 82 |
(); |
| 83 |
} elsif ($! != Errno::EAGAIN) { |
| 84 |
delete $self->{fh}; # to make event stop |
| 85 |
croak "irman communication error ($!)"; |
| 86 |
} else { |
| 87 |
(); |
| 88 |
} |
| 89 |
} |
| 90 |
|
| 91 |
sub get { |
| 92 |
fcntl $_[0]->{fh}, F_SETFL, 0; |
| 93 |
goto &_get; |
| 94 |
} |
| 95 |
|
| 96 |
sub poll { |
| 97 |
fcntl $_[0]->{fh}, F_SETFL, O_NONBLOCK; |
| 98 |
goto &_get; |
| 99 |
} |
| 100 |
|
| 101 |
1; |
| 102 |
|
| 103 |
=back |
| 104 |
|
| 105 |
=head1 AUTHOR |
| 106 |
|
| 107 |
This perl extension was written by Marc Lehmann <schmorp@schmorp.de>. |
| 108 |
|
| 109 |
|
| 110 |
|
| 111 |
|
| 112 |
|
