use which to find binaries

blacklist.sh

@@ -13,12 +13,18 @@ urls="$urls https://www.blocklist.de/downloads/export-ips_all.txt"
 
 blocklist_chain_name=blocklists
 
-if [ ! -x /usr/sbin/ipset ]; then
+if [ $(which ipset) ]; then
     echo "Cannot find ipset"
     echo "Run \"apt-get install ipset\" or \"yum install ipset\""
     exit 1
 fi
 
+if [ $(which curl) ]; then
+    echo "Cannot find curl"
+    echo "Run \"apt-get install curl\" or \"yum install curl\""
+    exit 1
+fi
+
 # create main blocklists chain
 if ! iptables -L ${blocklist_chain_name}; then iptables -N ${blocklist_chain_name}; fi