From 055a7ef6a9d668d4c82e7542526474d18bb63987 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=96=9F=E9=85=8C=20=E9=B5=AC=E5=85=84?= <tgckpg@gmail.com>
Date: Wed, 14 Jan 2015 10:45:04 +0800
Subject: [PATCH] Arg fool proof

---
 bash/bashrc/sources/41_pivot-command | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/bash/bashrc/sources/41_pivot-command b/bash/bashrc/sources/41_pivot-command
index c095c78..10559a4 100644
--- a/bash/bashrc/sources/41_pivot-command
+++ b/bash/bashrc/sources/41_pivot-command
@@ -29,6 +29,12 @@ function pvt() {
             ;;
     esac
 
+    if [[ -z "$ARG3" ]]; then
+        >&2 echo "Error: LAND_DIR is not defined"
+        pvt
+        return 1
+    fi
+
     IFS="/" read -a PWDA <<< "$(pwd)"
 
     # Begin finding dirs in up-stack