Add asynch.tcl so we can debug.

diff --git a/asynch.tcl b/asynch.tcl
new file mode 100755 (executable)
index 0000000..36b755f
--- /dev/null
+++ b/asynch.tcl
@@ -0,0 +1,72 @@
+#!/usr/bin/tclsh8.2
+
+# This [sub]program is Copyright (C) 1997-1999 Ian Jackson
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# $Id$
+ 
+proc asynch_startcmd {} {
+    global asynch_sofar
+    set asynch_sofar {}
+    puts -nonewline "% "
+    flush stdout
+}
+
+proc morecmd {} {
+    global asynch_sofar asynch_result asynch_code errorInfo
+    set r [read -nonewline stdin]
+    if {[eof stdin]} {
+       fconfigure stdin -blocking true
+       puts -nonewline "\n"
+       exit 0
+    }
+    append asynch_sofar $r
+    if {[info complete $asynch_sofar]} {
+       uplevel #0 {set asynch_code [catch $asynch_sofar asynch_result]}
+       if {$asynch_code} {
+           puts "** $errorInfo"
+           flush stdout
+       } elseif {[string length $asynch_result]} {
+           puts "=> $asynch_result"
+       }
+       flush stdout
+       asynch_startcmd
+    }
+}
+
+if {[llength $argv] && "[lindex $argv 0]" == "-d"} {
+    set tcl_traceExec 1
+    set argv [lreplace $argv 0 0]
+} elseif {[llength $argv] && "[lindex $argv 0]" == "-dd"} {
+    set tcl_traceExec 2
+    set argv [lreplace $argv 0 0]
+}
+
+if {[llength $argv] &&
+    [regexp {^-a(\d+)$} [lindex $argv 0] asynch_dummy asynch_appdebug]} {
+    set argv [lreplace $argv 0 0]
+}
+
+if {[llength $argv]} {
+    set asynch_script [lindex $argv 0]
+    set argv [lreplace $argv 0 0]
+    source $asynch_script
+}
+
+asynch_startcmd
+fileevent stdin readable morecmd
+fconfigure stdin -blocking false
+vwait asynch_quitting