Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / v9 / lib / perl5 / 5.8.8 / Net / FTP / dataconn.pm

##
## Generic data connection package
##

package Net::FTP::dataconn;

use Carp;
use vars qw(@ISA $timeout $VERSION);
use Net::Cmd;
use Errno;

$VERSION = '0.11';
@ISA = qw(IO::Socket::INET);

sub reading
{
my $data = shift;
${*$data}{'net_ftp_bytesread'} = 0;
}

sub abort
{
my $data = shift;
my $ftp  = ${*$data}{'net_ftp_cmd'};

# no need to abort if we have finished the xfer
return $data->close
   if ${*$data}{'net_ftp_eof'};

# for some reason if we continously open RETR connections and not
# read a single byte, then abort them after a while the server will
# close our connection, this prevents the unexpected EOF on the
# command channel -- GMB
if(exists ${*$data}{'net_ftp_bytesread'}
       && (${*$data}{'net_ftp_bytesread'} == 0)) {
  my $buf="";
  my $timeout = $data->timeout;
  $data->can_read($timeout) && sysread($data,$buf,1);
}

${*$data}{'net_ftp_eof'} = 1; # fake

$ftp->abort; # this will close me
}

sub _close
{
my $data = shift;
my $ftp  = ${*$data}{'net_ftp_cmd'};

$data->SUPER::close();

delete ${*$ftp}{'net_ftp_dataconn'}
   if exists ${*$ftp}{'net_ftp_dataconn'} &&
       $data == ${*$ftp}{'net_ftp_dataconn'};
}

sub close
{
my $data = shift;
my $ftp  = ${*$data}{'net_ftp_cmd'};

if(exists ${*$data}{'net_ftp_bytesread'} && !${*$data}{'net_ftp_eof'}) {
  my $junk;
  $data->read($junk,1,0);
  return $data->abort unless ${*$data}{'net_ftp_eof'};
}

$data->_close;

$ftp->response() == CMD_OK &&
   $ftp->message =~ /unique file name:\s*(\S*)\s*\)/ &&
   (${*$ftp}{'net_ftp_unique'} = $1);

$ftp->status == CMD_OK;
}

sub _select {
my ($data, $timeout, $do_read) = @_;
my ($rin,$rout,$win,$wout,$tout,$nfound);

vec($rin='',fileno($data),1) = 1;

($win, $rin) = ($rin, $win) unless $do_read;

while (1) {
  $nfound = select($rout=$rin, $wout=$win, undef, $tout=$timeout);

  last if $nfound >= 0;
  
  croak "select: $!"
    unless $!{EINTR};
}

$nfound;
}

sub can_read
{
_select(@_[0,1],1);
}

sub can_write
{
_select(@_[0,1],0);
}

sub cmd
{
my $ftp = shift;

${*$ftp}{'net_ftp_cmd'};
}

sub bytes_read {
my $ftp = shift;

${*$ftp}{'net_ftp_bytesread'} || 0;
}

1;