* generic/tclIO.c: Made several routines tolerant of

        * generic/tclIOUtil.c:  interp == NULL arguments.  [Bug 1380662]

3 files changed, 50 insertions, 27 deletions

diff --git a/ChangeLog b/ChangeLog
index d6058fd..ce43d9c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2006-02-15  Don Porter  <dgp@users.sourceforge.net>
+
+	* generic/tclIO.c:      Made several routines tolerant of
+        * generic/tclIOUtil.c:	interp == NULL arguments.  [Bug 1380662]
+
 2006-02-09  Don Porter  <dgp@users.sourceforge.net>
 
         * tests/main.test (Tcl_Main-6.7):       Improved robustness of
diff --git a/generic/tclIO.c b/generic/tclIO.c
index e0cf01a..852af2b 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclIO.c,v 1.61.2.17 2005/11/18 19:38:02 hobbs Exp $
+ * RCS: @(#) $Id: tclIO.c,v 1.61.2.18 2006/02/15 16:04:27 dgp Exp $
  */
 
 #include "tclInt.h"
@@ -1310,8 +1310,10 @@ Tcl_StackChannel(interp, typePtr, instanceData, mask, prevChan)
     }
 
     if (statePtr == NULL) {
-	Tcl_AppendResult(interp, "couldn't find state for channel \"",
-		Tcl_GetChannelName(prevChan), "\"", (char *) NULL);
+	if (interp) {
+	    Tcl_AppendResult(interp, "couldn't find state for channel \"",
+		    Tcl_GetChannelName(prevChan), "\"", (char *) NULL);
+	}
         return (Tcl_Channel) NULL;
     }
 
@@ -1329,9 +1331,11 @@ Tcl_StackChannel(interp, typePtr, instanceData, mask, prevChan)
      */
 
     if ((mask & (statePtr->flags & (TCL_READABLE | TCL_WRITABLE))) == 0) {
-	Tcl_AppendResult(interp,
-		"reading and writing both disallowed for channel \"",
-		Tcl_GetChannelName(prevChan), "\"", (char *) NULL);
+	if (interp) {
+	    Tcl_AppendResult(interp,
+		    "reading and writing both disallowed for channel \"",
+		    Tcl_GetChannelName(prevChan), "\"", (char *) NULL);
+	}
         return (Tcl_Channel) NULL;
     }
 
@@ -1350,8 +1354,10 @@ Tcl_StackChannel(interp, typePtr, instanceData, mask, prevChan)
 
 	if (Tcl_Flush((Tcl_Channel) prevChanPtr) != TCL_OK) {
 	    statePtr->csPtr = csPtr;
-	    Tcl_AppendResult(interp, "could not flush channel \"",
-		    Tcl_GetChannelName(prevChan), "\"", (char *) NULL);
+	    if (interp) {
+		Tcl_AppendResult(interp, "could not flush channel \"",
+			Tcl_GetChannelName(prevChan), "\"", (char *) NULL);
+	    }
 	    return (Tcl_Channel) NULL;
 	}
 
@@ -1477,9 +1483,11 @@ Tcl_UnstackChannel (interp, chan)
 
 	    if (Tcl_Flush((Tcl_Channel) chanPtr) != TCL_OK) {
 	        statePtr->csPtr = csPtr;
-		Tcl_AppendResult(interp, "could not flush channel \"",
-			Tcl_GetChannelName((Tcl_Channel) chanPtr), "\"",
-			(char *) NULL);
+		if (interp) {
+		    Tcl_AppendResult(interp, "could not flush channel \"",
+			    Tcl_GetChannelName((Tcl_Channel) chanPtr), "\"",
+			    (char *) NULL);
+		}
 		return TCL_ERROR;
 	    }
 
@@ -2562,9 +2570,11 @@ Tcl_Close(interp, chan)
     }
  
     if (statePtr->flags & CHANNEL_INCLOSE) {
-        Tcl_AppendResult(interp,
-	 "Illegal recursive call to close through close-handler of channel",
-	 (char *) NULL);
+	if (interp) {
+            Tcl_AppendResult(interp,
+	    "Illegal recursive call to close through close-handler of channel",
+	    (char *) NULL);
+	}
         return TCL_ERROR;
     }
     statePtr->flags |= CHANNEL_INCLOSE;
@@ -7574,13 +7584,17 @@ TclCopyChannel(interp, inChan, outChan, toRead, cmdPtr)
     outStatePtr	= outPtr->state;
 
     if (inStatePtr->csPtr) {
-	Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "channel \"",
-		Tcl_GetChannelName(inChan), "\" is busy", NULL);
+	if (interp) {
+	    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "channel \"",
+		    Tcl_GetChannelName(inChan), "\" is busy", NULL);
+	}
 	return TCL_ERROR;
     }
     if (outStatePtr->csPtr) {
-	Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "channel \"",
-		Tcl_GetChannelName(outChan), "\" is busy", NULL);
+	if (interp) {
+	    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "channel \"",
+		    Tcl_GetChannelName(outChan), "\" is busy", NULL);
+	}
 	return TCL_ERROR;
     }
 
@@ -7882,7 +7896,7 @@ CopyData(csPtr, mask)
      */
 
     total = csPtr->total;
-    if (cmdPtr) {
+    if (cmdPtr && interp) {
 	/*
 	 * Get a private copy of the command so we can mutate it
 	 * by adding arguments.  Note that StopCopy frees our saved
@@ -7906,12 +7920,14 @@ CopyData(csPtr, mask)
 	Tcl_Release((ClientData) interp);
     } else {
 	StopCopy(csPtr);
-	if (errObj) {
-	    Tcl_SetObjResult(interp, errObj);
-	    result = TCL_ERROR;
-	} else {
-	    Tcl_ResetResult(interp);
-	    Tcl_SetIntObj(Tcl_GetObjResult(interp), total);
+	if (interp) {
+	    if (errObj) {
+		Tcl_SetObjResult(interp, errObj);
+		result = TCL_ERROR;
+	    } else {
+		Tcl_ResetResult(interp);
+		Tcl_SetIntObj(Tcl_GetObjResult(interp), total);
+	    }
 	}
     }
     return result;
diff --git a/generic/tclIOUtil.c b/generic/tclIOUtil.c
index 5e0acbb..84c9161 100644
--- a/generic/tclIOUtil.c
+++ b/generic/tclIOUtil.c
@@ -17,7 +17,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclIOUtil.c,v 1.77.2.25 2006/01/12 18:03:48 vasiljevic Exp $
+ * RCS: @(#) $Id: tclIOUtil.c,v 1.77.2.26 2006/02/15 16:04:29 dgp Exp $
  */
 
 #include "tclInt.h"
@@ -1864,7 +1864,9 @@ Tcl_PosixError(interp)
 
     msg = Tcl_ErrnoMsg(errno);
     id = Tcl_ErrnoId();
-    Tcl_SetErrorCode(interp, "POSIX", id, msg, (char *) NULL);
+    if (interp) {
+	Tcl_SetErrorCode(interp, "POSIX", id, msg, (char *) NULL);
+    }
     return msg;
 }