Improve pg_upgrade X_OK comment.

diff --git a/contrib/pg_upgrade/exec.c b/contrib/pg_upgrade/exec.c
index ec2f944..7c69175 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