From f609986735b0a381d6ad95ad30a62f1fdf8169a8 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Mon, 21 Aug 2017 21:47:54 +1200
Subject: Add arg checks to chc(1df)

---
 bin/chc.sh | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/bin/chc.sh b/bin/chc.sh
index 8b15317c..ee030f5f 100644
--- a/bin/chc.sh
+++ b/bin/chc.sh
@@ -1,5 +1,12 @@
 # Cache the output of a command and emit it straight from the cache if not
 # expired on each run
+self=chc
+
+# Check arguments for sanity
+if [ "$#" -lt 3 ] ; then
+    printf >&2 '%s: Need a cache path, a duration, and a command\n' "$self"
+    exit 2
+fi
 
 # First argument is the cache path, second is the duration in seconds
 cac=$1 dur=$2
-- 
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