Give a better help message when run without arguments.HEADmaster

1 files changed, 10 insertions, 3 deletions

diff --git a/check_sign_aide.sh b/check_sign_aide.sh
index 7549b33..87eebea 100755
--- a/check_sign_aide.sh
+++ b/check_sign_aide.sh
@@ -1,8 +1,15 @@
 #!/bin/bash
 
-if [ ! $1 ]; then
-	echo "You must at least provide an argument for which action to take."
-	exit
+if [ "$#" -lt 1 ]; then
+        echo -e "\nYou must at least provide an argument for which action to take.\n"
+        echo -e "Usage:\n"
+        echo -e "    $ ./check_sign_aide.sh <action> [host [host] ...]\n"
+        echo -e "Action must be one of:\n"
+        echo -e "    * check - verify signatures of core AIDE files"
+        echo -e "    * sign - sign core AIDE files"
+        echo -e "    * copydb - overwrite old AIDE database with new one, and sign it\n"
+        echo -e "If no host is specified, then all configured hosts will receive <action>.\n"
+        exit
 fi
 
 DOMAIN="example.com"