From 6579cf5f72d5de345ae1cc97d0344dfa1771460a Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Mon, 28 Jan 2019 22:20:33 +0000
Subject: [PATCH] Use external command mv to rename old output directory
 (RHBZ#1670191).

See https://bugzilla.redhat.com/show_bug.cgi?id=1670191#c0
for explanation.

Thanks: Sam Eiderman
---
 src/supermin.ml | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/supermin.ml b/src/supermin.ml
index 71d8b64..7c7135b3 100644
--- a/src/supermin.ml
+++ b/src/supermin.ml
@@ -264,12 +264,10 @@ appliance automatically.
 
   (* Delete the old output directory if it exists. *)
   let old_outputdir =
-    try
-      let old_outputdir = outputdir ^ "." ^ string_random8 () in
-      rename outputdir old_outputdir;
-      Some old_outputdir
-    with
-      Unix_error _ -> None in
+    let old_outputdir = outputdir ^ "." ^ string_random8 () in
+    let cmd = sprintf "mv %s %s 2>/dev/null"
+                      (quote outputdir) (quote old_outputdir) in
+    if Sys.command cmd == 0 then Some old_outputdir else None in
 
   if debug >= 1 then
     printf "supermin: renaming %s to %s\n%!" new_outputdir outputdir;
-- 
2.22.0