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authorvincentdarley <vincentdarley>2002-07-08 12:08:34 (GMT)
committervincentdarley <vincentdarley>2002-07-08 12:08:34 (GMT)
commit284a565718399779d86f434a058a3d2880270e8f (patch)
treec998b7a4adf7ece8d82aa33f2b7c1a4643ddc722 /generic/tclIOUtil.c
parent095d33883b3a4b3d586f2c39679ca943b7e344e4 (diff)
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no zero refcount in Tcl_FS
Diffstat (limited to 'generic/tclIOUtil.c')
-rw-r--r--generic/tclIOUtil.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/generic/tclIOUtil.c b/generic/tclIOUtil.c
index d779b5c..d273e6c 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 1.53 2002/07/08 10:11:22 vincentdarley Exp $
+ * RCS: @(#) $Id: tclIOUtil.c,v 1.54 2002/07/08 12:08:34 vincentdarley Exp $
*/
#include "tclInt.h"
@@ -4757,6 +4757,17 @@ Tcl_FSGetFileSystemForPath(pathObjPtr)
Tcl_Filesystem* retVal = NULL;
FsPath* srcFsPathPtr;
+ /*
+ * If the object has a refCount of zero, we reject it. This
+ * is to avoid possible segfaults or nondeterministic memory
+ * leaks (i.e. the user doesn't know if they should decrement
+ * the ref count on return or not).
+ */
+
+ if (pathObjPtr->refCount == 0) {
+ return NULL;
+ }
+
/* Make sure pathObjPtr is of our type */
if (Tcl_FSConvertToPathType(NULL, pathObjPtr) != TCL_OK) {