Improve tmp dir function for zsh

system/include/functions/t.sh

@@ -4,22 +4,26 @@
 
 
 # Create temporary directory.
-# # Note: macOS requires `env LC_CTYPE=C`.
+#
+# Note: macOS requires `env LC_CTYPE=C`.
 # Otherwise, you'll see this error: `tr: Illegal byte sequence`.
 # This doesn't seem to work reliably, so using timestamp instead.
-# # See also:
+#
+# See also:
 # - https://gist.github.com/earthgecko/3089509
-# # Updated 2019-06-27.
+#
+# Updated 2019-09-04.
 _koopa_tmp_dir() {
     local unique
     local dir
 
     unique="$(date "+%Y%m%d-%H%M%S")"
     dir="/tmp/koopa-$(id -u)-${unique}"
 
-    mkdir -p "$dir"
-    chown "$USER" "$dir"
-    chmod 0775 "$dir"
+    # This doesn't work well with zsh.
+    # > mkdir -p "$dir"
+    # > chown "$USER" "$dir"
+    # > chmod 0775 "$dir"
 
     echo "$dir"
 }