use ruby to fetch process list

Gemfile

@@ -3,3 +3,4 @@ source "http://rubygems.org"
 gem "cucumber"
 gem "rake"
 gem "osmlib-base"
+gem "sys-proctable"

Gemfile.lock

@@ -14,6 +14,7 @@ GEM
     json (1.6.5)
     osmlib-base (0.1.4)
     rake (0.9.2.2)
+    sys-proctable (0.9.1)
     term-ansicolor (1.0.7)
 
 PLATFORMS
@@ -23,3 +24,4 @@ DEPENDENCIES
   cucumber
   osmlib-base
   rake
+  sys-proctable

Rakefile

@@ -2,6 +2,7 @@ require 'OSM/StreamParser'
 require 'socket'
 require 'digest/sha1'
 require 'cucumber/rake/task'
+require 'sys/proctable'
 
 SANDBOX = 'sandbox'
 DATA_FOLDER = 'osm_data'
@@ -30,9 +31,10 @@ task osm_data_area_name.to_sym {}   #define empty task to prevent rake from whin
 
 
 def each_process name, &block
-  process_list = `ps -o pid -o state -o ucomm`
-  process_list.scan /(\d+)\s+([^\s]*)\s+(#{name})/ do |pid,state|
-  yield pid.to_i, state.strip if ['I','R','S','T'].include? state[0]
+  Sys::ProcTable.ps do |process|
+    if process.comm.strip == name.strip
+      yield process.pid.to_i, process.state.strip
+    end
   end
 end
 

features/support/launch.rb

@@ -1,4 +1,5 @@
 require 'socket'
+require 'sys/proctable'
 
 class OSRMLauncher
   def initialize &block
@@ -11,9 +12,10 @@ class OSRMLauncher
 end
 
 def each_process name, &block
-  process_list = `ps -o pid -o state -o ucomm`
-  process_list.scan /(\d+)\s+([^\s]*)\s+(#{name})/ do |pid,state|
-  yield pid.to_i, state.strip if ['I','R','S','T'].include? state[0]
+  Sys::ProcTable.ps do |process|
+    if process.comm.strip == name.strip
+      yield process.pid.to_i, process.state.strip
+    end
   end
 end