[Fix #437] Always set $TMPDIR

runcoms/zshenv

@@ -64,10 +64,13 @@ fi
 # Temporary Files
 #
 
-if [[ -d "$TMPDIR" ]]; then
+if [[ ! -d "$TMPDIR" ]]; then
-  export TMPPREFIX="${TMPDIR%/}/zsh"
+  export TMPDIR="/tmp/$USER"
+  mkdir -p -m 700 "$TMPDIR"
+fi
+
+TMPPREFIX="${TMPDIR%/}/zsh"
 if [[ ! -d "$TMPPREFIX" ]]; then
   mkdir -p "$TMPPREFIX"
 fi
-fi