Splits check-cnames

scripts/check-cname

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+domain="$1"
+
+if [ -z "$domain" ]; then
+    exit 1
+fi
+
+host -t CNAME "$domain" | grep 'is an alias for' | awk '{print $NF}' |
+while read cname; do
+    if ! host "$cname" &>/dev/null; then
+        echo "$cname does not resolve (pointed at by $domain)";
+    fi;
+done

scripts/check-cnames.sh

@@ -1,9 +1,2 @@
 #!/bin/bash
-
-xargs -P20 -n1 -I{} bash -c "host -t CNAME {} |
-    grep 'is an alias for' | awk '{print \$NF}' |
-    while read cname; do
-        if ! host \$cname &>/dev/null; then
-            echo \"\$cname does not resolve (pointed at by {})\";
-        fi;
-    done"
+xargs -P20 -n1 -I{} check-cname {}