Solaris ps system call command line args fix.

Author: hirschnase

lib/resque/worker.rb

@@ -536,28 +536,32 @@ def worker_pids
 
     # Find Resque worker pids on Linux and OS X.
     #
-    # Returns an Array of string pids of all the other workers on this
-    # machine. Useful when pruning dead workers on startup.
     def linux_worker_pids
-      `ps -A -o pid,command | grep "[r]esque" | grep -v "resque-web"`.split("\n").map do |line|
-        line.split(' ')[0]
-      end
+      get_worker_pids('ps -A -o pid,command')
     end
 
     # Find Resque worker pids on Solaris.
     #
-    # Returns an Array of string pids of all the other workers on this
-    # machine. Useful when pruning dead workers on startup.
     def solaris_worker_pids
-      `ps -A -o pid,comm | grep "[r]uby" | grep -v "resque-web"`.split("\n").map do |line|
-        real_pid = line.split(' ')[0]
-        pargs_command = `pargs -a #{real_pid} 2>/dev/null | grep [r]esque | grep -v "resque-web"`
-        if pargs_command.split(':')[1] == " resque-#{Resque::Version}"
-          real_pid
-        end
-      end.compact
+      get_worker_pids('ps -A -o pid,args')
     end
 
+    # Find worker pids - platform independent
+    #
+    # Returns an Array of string pids of all the other workers on this
+    # machine. Useful when pruning dead workers on startup.
+    def get_worker_pids(command)
+       active_worker_pids = []
+       output = %x[#{command}]  # output format of ps must be ^<PID> <COMMAND WITH ARGS>
+       raise 'System call for ps command failed. Please make sure that you have a compatible ps command in the path!' unless $?.success?
+       output.split("\n").each{|line| 
+        next unless line =~ /resque/i
+        next if line =~ /resque-web/
+        active_worker_pids.push line.split(' ')[0]
+       }
+       active_worker_pids
+    end
+    
     # Given a string, sets the procline ($0) and logs.
     # Procline is always in the format of:
     #   resque-VERSION: STRING