metrics-curl.rb in sensu-plugins-http-6.0.0

- old
+ new

@@ -27,11 +27,10 @@
 # LICENSE:
 #   Copyright 2012 Joe Miller
 #   Released under the same terms as Sensu (the MIT license); see LICENSE
 #   for details.
 #
-
 require 'socket'
 require 'English'
 require 'sensu-plugin/metric/cli'
 
 #
@@ -56,13 +55,18 @@
          long: '--scheme SCHEME',
          required: true,
          default: "#{Socket.gethostname}.curl_timings"
 
   def run
+    `type -t "curl" > /dev/null 2>&1`
+    unless $CHILD_STATUS == 0
+      critical 'CRITICAL: curl executable not found in PATH on this system.'\
+               ' If curl cannot be installed, consider using metrics_libcurl.rb instead.'
+    end
+
     cmd = "LC_NUMERIC=C curl --silent --output /dev/null #{config[:curl_args]} "
     cmd += '-w "%{time_total},%{time_namelookup},%{time_connect},%{time_pretransfer},%{time_redirect},%{time_starttransfer},%{http_code}" '
     cmd += config[:url]
-
     output = `#{cmd}`
 
     (time_total, time_namelookup, time_connect, time_pretransfer, time_redirect, time_starttransfer, http_code) = output.split(',')
     output "#{config[:scheme]}.time_total", time_total
     output "#{config[:scheme]}.time_namelookup", time_namelookup