Changeset 10006 in vbox for trunk/src/VBox/Additions/common/VBoxGuestLib

Timestamp:

Jun 27, 2008 9:37:23 PM (16 years ago)

Author:

vboxsync

Message:

Additions/common: retrieve guest property: fix if the property doesn't exist and corrected a comment

File:

• trunk/src/VBox/Additions/common/VBoxGuestLib/VBoxGuestR3LibInfoSvc.cpp (modified) (2 diffs)

trunk/src/VBox/Additions/common/VBoxGuestLib/VBoxGuestR3LibInfoSvc.cpp

@@ -132 +132 @@
  * @param   pszValue        Where to store the value retrieved.
  * @param   cbValue         The size of the buffer pszValue points to.
- * @param   pcbActual       Where to store the required buffer size. This should be set on buffer
- *                          overflows errors but actually isn't... Optional.
+ * @param   pcbActual       Where to store the required buffer size if cbValue
+ *                          is too small.  On success this contains the
+ *                          actual size of the value retrieved.  If there is 
+ *                          no such value this is set to zero.  Optional.
  */
 VBGLR3DECL(int) VbglR3InfoSvcReadKey(uint32_t u32ClientId, char *pszKey,
@@ -162 +164 @@
         else
             rc = Msg.hdr.result;
+        if ((cbValue > 0) && (0 == cbActual))  /* No such property */
+            pszValue[0] = 0;
     }
     return rc;