Use WinReg_GetSZ() to get the Tools install path.

RegOpenKey() tries to open the registry key with too many permissions,
which is not allowed for all users. GetSZ() uses RegOpenKeyEx() with
just the needed permission to read the value, which should work for
more users.

Signed-off-by: Marcelo Vanzin <mvanzin@vmware.com>

diff --git a/open-vm-tools/lib/guestApp/guestApp.c b/open-vm-tools/lib/guestApp/guestApp.c
index 62df560cd3907ce2250cb8ddf4e7236978d9d4ac..17778fb841257cda4b6664656cbb3114ecb6ec32 100644 (file)
--- a/open-vm-tools/lib/guestApp/guestApp.c
+++ b/open-vm-tools/lib/guestApp/guestApp.c
@@ -58,6 +58,7 @@ extern "C" {
 #ifdef _MSC_VER
 #include <windows.h>
 #include <shlobj.h>
+#include "winregistry.h"
 #endif
 
 /*
@@ -893,52 +894,26 @@ GuestApp_GetInstallPath(void)
    char *pathUtf8 = NULL;
 
 #if defined(_WIN32)
-   LONG rv;
-   HKEY key;
-   DWORD type;
-   DWORD len = MAX_PATH;
-   size_t posLastChar;
-   WCHAR path[MAX_PATH] = L"";
    size_t pathLen = 0;
-   const WCHAR *keyName = L"Software\\VMware, Inc.\\VMware Tools";
 
-   rv = RegOpenKeyW(HKEY_LOCAL_MACHINE, keyName, &key);
-   if (rv != ERROR_SUCCESS) {
-      Warning("%s: Unable to open product key: error: %s\n",
+   if (WinReg_GetSZ(HKEY_LOCAL_MACHINE,
+                    "Software\\VMware, Inc.\\VMware Tools",
+                    "InstallPath",
+                    &pathUtf8) != ERROR_SUCCESS) {
+      Warning("%s: Unable to retrieve install path: %s\n",
                __FUNCTION__, Msg_ErrString());
       return NULL;
    }
 
-   rv = RegQueryValueExW(key, L"InstallPath", 0, &type, (LPBYTE)path, &len);
-   RegCloseKey(key);
-   if (rv != ERROR_SUCCESS) {
-      Warning("%s: Unable to retrieve key: error: %s\n",
-               __FUNCTION__, Msg_ErrString());
-      return NULL;
-   }
+   /* Strip off the trailing backslash, if present */
 
-   /*
-    * Strip off the trailing backslash.  This needs to be done with wchars to
-    * ensure that we don't mess up a path that ends with the 5C character.
-    */
-
-   pathLen = wcslen(path);
+   pathLen = strlen(pathUtf8);
    if (pathLen > 0) {
-      posLastChar = pathLen - 1;
-      if (path[posLastChar] == L'\\') {
-         path[posLastChar] = L'\0';
+      if (pathUtf8[pathLen - 1] == '\\') {
+         pathUtf8[pathLen - 1] = '\0';
       }
    }
 
-   /* Convert to UTF-8 before returning to the outside world. */
-   if (!CodeSet_Utf16leToUtf8((const char *)path,
-                              wcslen(path) * sizeof(WCHAR),
-                              &pathUtf8,
-                              NULL)) {
-      Warning("%s: Unable to convert to UTF-8\n", __FUNCTION__);
-      return NULL;
-   }
-
 #else
    pathUtf8 = Str_Asprintf(NULL, "%s", GUESTAPP_TOOLS_INSTALL_PATH);
 #endif