* win/tclAppInit.c (sigHandler): Protect from trying to close a

	NULL handle.

	* win/tclWinPipe.c (PipeClose2Proc, TclpCreateProcess):  Send a
	real Win32 signal (CTRL_C_EVENT) when the read channel is brought
	down to alert the child to close on its side.  Start the process
	with CREATE_NEW_PROCESS_GROUP to allow the ability to send these
	signals.  The following test case now brings down the child
	without the use of an external [kill] command.

	% set p [open "|[info name]" w+]
	file8d5380
	% pid $p
	2876
	% close $p     <- now doesn't block in Tcl_WaitPid()
	%

3 files changed, 42 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index 156d329..28f0e95 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,22 @@
+2002-12-03  David Gravereaux  <davygrvy@pobox.com>
+
+	* win/tclAppInit.c (sigHandler):  Protect from trying to close a
+	NULL handle.
+
+	* win/tclWinPipe.c (PipeClose2Proc, TclpCreateProcess):  Send a
+	real Win32 signal (CTRL_C_EVENT) when the read channel is brought
+	down to alert the child to close on its side.  Start the process
+	with CREATE_NEW_PROCESS_GROUP to allow the ability to send these
+	signals.  The following test case now brings down the child
+	without the use of an external [kill] command.
+
+	% set p [open "|[info name]" w+]
+	file8d5380
+	% pid $p
+	2876
+	% close $p     <- now doesn't block in Tcl_WaitPid()
+	%
+
 2002-11-27  David Gravereaux  <davygrvy@pobox.com>
 
 	* win/tclWinPort.h:  Don't turn off winsock prototypes!
diff --git a/win/tclAppInit.c b/win/tclAppInit.c
index b589027..864f59a 100644
--- a/win/tclAppInit.c
+++ b/win/tclAppInit.c
@@ -11,7 +11,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclAppInit.c,v 1.10 2002/11/04 05:50:19 davygrvy Exp $
+ * RCS: @(#) $Id: tclAppInit.c,v 1.11 2002/12/04 03:59:17 davygrvy Exp $
  */
 
 #include "tcl.h"
@@ -376,6 +376,7 @@ asyncExit (ClientData clientData, Tcl_Interp *interp, int code)
 BOOL __stdcall
 sigHandler(DWORD fdwCtrlType)
 {
+    HANDLE hStdIn;
     /*
      * If Tcl is currently executing some bytecode or in the eventloop,
      * this will cause Tcl to enter asyncExit at the next command
@@ -388,8 +389,11 @@ sigHandler(DWORD fdwCtrlType)
      * This will cause Tcl_Gets in Tcl_Main() to drop-out with an <EOF> 
      * should it be blocked on input and our Tcl_AsyncMark didn't grab 
      * the attention of the interpreter. 
-     */ 
-    CloseHandle(GetStdHandle(STD_INPUT_HANDLE));
+     */
+    hStdIn = GetStdHandle(STD_INPUT_HANDLE);
+    if (hStdIn) {
+	CloseHandle(hStdIn);
+    }
 
     /* indicate to the OS not to call the default terminator */ 
     return TRUE; 
diff --git a/win/tclWinPipe.c b/win/tclWinPipe.c
index 8a6fc59..9de247c 100644
--- a/win/tclWinPipe.c
+++ b/win/tclWinPipe.c
@@ -9,7 +9,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclWinPipe.c,v 1.27 2002/11/26 22:35:20 davygrvy Exp $
+ * RCS: @(#) $Id: tclWinPipe.c,v 1.28 2002/12/04 03:59:17 davygrvy Exp $
  */
 
 #include "tclWinInt.h"
@@ -1143,7 +1143,7 @@ TclpCreateProcess(
 
     if (TclWinGetPlatformId() == VER_PLATFORM_WIN32_NT) {
 	if (HasConsole()) {
-	    createFlags = 0;
+	    createFlags = CREATE_NEW_PROCESS_GROUP;
 	} else if (applType == APPL_DOS) {
 	    /*
 	     * Under NT, 16-bit DOS applications will not run unless they
@@ -1162,7 +1162,7 @@ TclpCreateProcess(
 	} 
     } else {
 	if (HasConsole()) {
-	    createFlags = 0;
+	    createFlags = CREATE_NEW_PROCESS_GROUP;
 	} else {
 	    createFlags = DETACHED_PROCESS;
 	}
@@ -1852,6 +1852,19 @@ PipeClose2Proc(
     errorCode = 0;
     if ((!flags || (flags == TCL_CLOSE_READ))
 	    && (pipePtr->readFile != NULL)) {
+
+	/*
+	 * Send the console group a notification of close.  We assume
+	 * the child is a console application, and that it will respond.
+	 * It doesn't seem as though console mode applications that
+	 * don't set a HandlerRoutine acknowledge this.
+	 */
+
+	if (HasConsole() && pipePtr->numPids) {
+	    GenerateConsoleCtrlEvent(CTRL_C_EVENT,
+		    TclpGetPid(pipePtr->pidPtr[0]));
+	}
+
 	/*
 	 * Clean up the background thread if necessary.  Note that this
 	 * must be done before we can close the file, since the