1 files changed, 182 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Tk/IO.pm b/Master/tlpkg/tlperl/lib/Tk/IO.pm
new file mode 100644
index 00000000000..771e9f7103a
--- /dev/null
+++ b/Master/tlpkg/tlperl/lib/Tk/IO.pm
@@ -0,0 +1,182 @@
+package Tk::IO;
+use strict;
+use vars qw($VERSION);
+$VERSION = '4.004'; # $Id: //depot/Tkutf8/IO/IO.pm#4 $
+
+require 5.002;
+use Tk::Event qw($XS_VERSION);
+
+use Carp;
+use base  qw(DynaLoader IO::Handle);
+
+bootstrap Tk::IO;
+
+my %fh2obj;
+my %obj2fh;
+
+sub new
+{
+ my ($package,%args) = @_;
+ # Do whatever IO::Handle does
+ my $fh  = $package->SUPER::new;
+ %{*$fh} = ();  # The hash is used for configure options
+ ${*$fh} = '';  # The scalar is used as the 'readable' buffer
+ @{*$fh} = ();  # The array
+ $fh->configure(%args);
+ return $fh;
+}
+
+sub pending
+{
+ my $fh = shift;
+ return ${*$fh};
+}
+
+sub cget
+{
+ my ($fh,$key) = @_;
+ return ${*$fh}{$key};
+}
+
+sub configure
+{
+ my ($fh,%args) = @_;
+ my $key;
+ foreach $key (keys %args)
+  {
+   my $val = $args{$key};
+   $val = Tk::Callback->new($val) if ($key =~ /command$/);
+   ${*$fh}{$key} = $val;
+  }
+}
+
+sub killpg
+{
+ my ($fh,$sig) = @_;
+ my $pid = $fh->pid;
+ croak 'No child' unless (defined $pid);
+ kill($sig,-$pid);
+}
+
+sub kill
+{
+ my ($fh,$sig) = @_;
+ my $pid = $fh->pid;
+ croak 'No child' unless (defined $pid);
+ kill($sig,$pid) || croak "Cannot kill($sig,$pid):$!";
+}
+
+sub readable
+{
+ my $fh     = shift;
+ my $count  = sysread($fh,${*$fh},1,length(${*$fh}));
+ if ($count < 0)
+  {
+   if (exists ${*$fh}{-errorcommand})
+    {
+     ${*$fh}{-errorcommand}->Call($!);
+    }
+   else
+    {
+     warn "Cannot read $fh:$!";
+     $fh->close;
+    }
+  }
+ elsif ($count)
+  {
+   if (exists ${*$fh}{-linecommand})
+    {
+     my $eol = index(${*$fh},"\n");
+     if ($eol >= 0)
+      {
+       my $line = substr(${*$fh},0,++$eol);
+       substr(${*$fh},0,$eol) = '';
+       ${*$fh}{-linecommand}->Call($line);
+      }
+    }
+  }
+ else
+  {
+   $fh->close;
+  }
+}
+
+sub pid
+{
+ my $fh = shift;
+ return ${*$fh}{-pid};
+}
+
+sub command
+{
+ my $fh  = shift;
+ my $cmd = ${*$fh}{'-exec'};
+ return (wantarray) ? @$cmd : $cmd;
+}
+
+sub exec
+{
+ my $fh  = shift;
+ my $pid = open($fh,'-|');
+ if ($pid)
+  {
+   ${*$fh} = '' unless (defined ${*$fh});
+   ${*$fh}{'-exec'} = [@_];
+   ${*$fh}{'-pid'}  = $pid;
+   if (exists ${*$fh}{-linecommand})
+    {
+     my $w = ${*$fh}{-widget};
+     $w = 'Tk' unless (defined $w);
+     $w->fileevent($fh,'readable',[$fh,'readable']);
+     ${*$fh}{_readable} = $w;
+    }
+   else
+    {
+     croak Tk::Pretty::Pretty(\%{*$fh});
+    }
+   return $pid;
+  }
+ else
+  {
+   # make STDERR same as STDOUT here
+   setpgrp;
+   exec(@_) || die 'Cannot exec ',join(' ',@_),":$!";
+  }
+}
+
+sub wait
+{
+ my $fh = shift;
+ my $code;
+ my $ch = delete ${*$fh}{-childcommand};
+ ${*$fh}{-childcommand} = Tk::Callback->new(sub { $code = shift });
+ Tk::Event::DoOneEvent(0) until (defined $code);
+ if (defined $ch)
+  {
+   ${*$fh}{-childcommand} = $ch;
+   $ch->Call($code,$fh)
+  }
+ return $code;
+}
+
+sub close
+{
+ my $fh = shift;
+ my $code;
+ if (defined fileno($fh))
+  {
+   my $w = delete ${*$fh}{_readable};
+   $w->fileevent($fh,'readable','') if (defined $w);
+   $code = close($fh);
+   if (exists ${*$fh}{-childcommand})
+    {
+     ${*$fh}{-childcommand}->Call($?,$fh);
+    }
+  }
+ return $code;
+}
+
+1;
+__END__
+
+