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=head1 NAME |
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RCU::Irman - RCU interface to libirman. |
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=head1 SYNOPSIS |
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use RCU::Irman; |
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=head1 DESCRIPTION |
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See L<RCU>. |
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=over 4 |
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=cut |
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package RCU::Irman; |
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use Carp; |
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use Errno (); |
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use Fcntl; |
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use RCU; |
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use base qw(RCU::Interface); |
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$VERSION = 0.11; |
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=item new <path> |
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Create an interface to the RCU receiver at serial port <path> (default |
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from in irman.conf used if omitted). |
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=cut |
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sub new { |
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my $class = shift; |
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my $path = shift; |
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my $self = $class->SUPER::new(); |
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local (*CW, *CR); |
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$self->{fh} = local *IRMAN_FH; |
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$self->{ifh} = local *IRMAN_IFH; |
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pipe $self->{fh}, CW or die "unable to create communications pipe"; |
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pipe CR, $self->{ifh} or die "unable to create communications pipe"; |
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$self->{pid} = fork; |
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if ($self->{pid} == 0) { |
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use Config; |
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close $self->{ifh}; close $self->{fh}; |
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open STDIN, "<&CR"; open STDOUT, ">&CW"; close STDERR; |
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fcntl STDIN, F_SETFD, 0; fcntl STDOUT, F_SETFD, 0; |
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exec "$Config{installbin}/rcu-irman-helper", "", $path || ""; |
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} elsif (!defined $self->{pid}) { |
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die; |
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} |
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close CR; close CW; |
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$self->get; # wait for I packet |
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$self; |
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} |
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sub fd { |
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fileno $_[0]->{fh}; |
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} |
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sub _get { |
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my $self = shift; |
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my $fh = $self->{fh}; |
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local $/ = "\x00"; |
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$! = 0; |
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my $code = <$fh>; |
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if ("=" eq substr $code, 0, 1) { |
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split /\x01/, substr $code, 1, -1; |
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} elsif ($code =~ s/^E//) { |
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die substr $code, 0, -1; |
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} elsif ($code =~ /^I/) { |
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# NOP |
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(); |
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} elsif ($! != Errno::EAGAIN) { |
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delete $self->{fh}; # to make event stop |
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croak "irman communication error ($!)"; |
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} else { |
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(); |
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} |
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} |
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sub get { |
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fcntl $_[0]->{fh}, F_SETFL, 0; |
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goto &_get; |
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} |
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sub poll { |
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fcntl $_[0]->{fh}, F_SETFL, O_NONBLOCK; |
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goto &_get; |
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} |
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1; |
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=back |
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=head1 AUTHOR |
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This perl extension was written by Marc Lehmann <schmorp@schmorp.de>. |
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