Improve pg_upgrade X_OK comment.

diff --git a/contrib/pg_upgrade/exec.c b/contrib/pg_upgrade/exec.c
index ec2f94436bf1949f075a6d4744a525a6dc21dd41..7c691750e1381e4c8ef4d50a9a2575a50fe318b6 100644 (file)
--- a/contrib/pg_upgrade/exec.c
+++ b/contrib/pg_upgrade/exec.c
@@ -97,9 +97,9 @@ verify_directories(void)
    if (access(".", R_OK | W_OK
 #ifndef WIN32
    /*
-    *  Directory execute permission on NTFS means "can execute scripts",
-    *  which we don't care about, so skip the check.  Also, X_OK is not
-    *  defined in the API.
+    *  Do a directory execute check only on Unix because execute permission
+    *  on NTFS means "can execute scripts", which we don't care about.
+    *  Also, X_OK is not defined in the Windows API.
     */
                    | X_OK
 #endif