improvements

1 files changed, 6 insertions, 2 deletions

diff --git a/etckeeper b/etckeeper
index 539e880..dd44b02 100755
--- a/etckeeper
+++ b/etckeeper
@@ -1,15 +1,19 @@
 #!/bin/sh
 set -e
 
-if [ "$0" != etckeeper ]; then
+if [ "$(basename $0)" != etckeeper ]; then
 	command="$(basename $0 | sed -e s/etckeeper-//)"
 else
+	if [ -z "$1" ]; then
+		echo "usage: etckeeper command" >&2
+		exit 1
+	fi
 	command="$1"
 	shift 1
 fi
 
 if [ ! -d "/etc/etckeeper/$command.d" ]; then
-	echo "/etc/etckeeper/$command.d does not exist" >&2
+	echo "etckeeper: /etc/etckeeper/$command.d does not exist" >&2
 	exit 1
 fi