diff --git a/lib/ulib/base b/lib/ulib/base
index 250087f..13e7e52 100644
--- a/lib/ulib/base
+++ b/lib/ulib/base
@@ -824,7 +824,9 @@ function update_link() {
         # c'est un lien relatif, faire un lien relatif
         dest="$(relpath "$1" "$linkdir")"
     fi
-    if [ -d "$link" ]; then
+    if [ "$dest" == "$ldest" ]; then
+        : # pas besoin de mettre à jour
+    elif [ -d "$link" ]; then
         rm -f "$link" && ln -s "$dest" "$link"
     else
         ln -sf "$dest" "$link"
@@ -837,14 +839,17 @@ function move_link() {
     [ -n "$1" -a -n "$2" ] || return 1
     local link="$1" dest="$2"
     [ -d "$dest" ] && dest="$dest/$(basename -- "$link")"
+    dest="$(abspath "$dest")"
     if [ -L "$link" ]; then
         link="$(abspath "$link")"
         linkdir="$(dirname -- "$link")"
         ldest="$(readlink "$link")"
         ldest="$(abspath "$ldest" "$linkdir")"
+        [ "$dest" == "$link" ] && return 1
         mv "$link" "$dest" || return 1
         update_link "$ldest" "$dest"
     else
+        [ "$dest" == "$link" ] && return 1
         mv "$link" "$dest"
     fi
 }
@@ -889,7 +894,7 @@ function move_file() {
     local src="$1" dest="$2" link
     shift; shift
     [ -d "$dest" ] && dest="$dest/$(basename -- "$src")"
-    move_link "$src" "$dest" || return
+    move_link "$src" "$dest" || return 1
     for link in "$@"; do
         update_link "$dest" "$link"
     done