Module: ProcessWanker::ProcessUtil

Defined in:
lib/process_util.rb

Constant Summary collapse

ENVIRONMENT_KEY = 
"PWANKER"
@@all_processes = 
{}
@@processes = 
{}
@@known_hashes = 
{}
@@unknown_history = 
{}
@@os = 
`uname -a`.split[0].downcase.to_sym

Class Method Summary collapse

Class Method Details

.all_processes ⇒ Object 



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# File 'lib/process_util.rb', line 161

def all_processes
  @@all_processes
end

.build_known_hashes ⇒ Object 



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# File 'lib/process_util.rb', line 34

def build_known_hashes()
  # build hash of all known environment hashes
  @@unknown_history={}
  @@known_hashes={}
  ServiceMgr::instance.services_by_name.each do |n,s|
    next unless(s.respond_to?(:env_hash))
    @@known_hashes[ s.env_hash ]=s
  end
end

.kill_unknown ⇒ Object 



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# File 'lib/process_util.rb', line 172

def kill_unknown

  # build list of pids that we ought to kill
  unknown_pids={}
  @@processes.each do |p,v|
    next if(@@known_hashes[p])
    v.each do |vv|
      unknown_pids[vv]=true
      @@unknown_history[vv] ||= { :last_kill_time => Time.at(0), :kcount => 0 }
    end
  end
  
  # clean out any unknown_history entries that no longer appear
  @@unknown_history.keys.select { |x| !unknown_pids[x] }.each { |d| @@unknown_history.delete(d) }

  # process entries
  now=Time.now()
  @@unknown_history.each do |pid,state|

    elapsed=now - state[:last_kill_time]
    next if(elapsed < 5)

    mode=(state[:kcount] < 3) ? "TERM" : "KILL"
    Log::info("kill #{mode} #{pid}")
    Process.kill(mode,pid)
    state[:last_kill_time]=now
    state[:kcount] += 1
  end
  
end

.processes ⇒ Object 



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# File 'lib/process_util.rb', line 150

def processes
  @@processes
end

.reap ⇒ Object 



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# File 'lib/process_util.rb', line 134

def reap
  begin
    while(true)
        break if(!Process::waitpid(-1,Process::WNOHANG))
    end
  rescue Exception => e
  end
end

.scan_processes ⇒ Object 



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# File 'lib/process_util.rb', line 51

def scan_processes
  if(@@os == :linux)
    scan_processes_linux()
  elsif(@@os == :darwin)
    scan_processes_osx()
  else
    raise "Bad os?"
  end
end

.scan_processes_linux ⇒ Object 



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# File 'lib/process_util.rb', line 68

def scan_processes_linux

  all_procs={}
procs={}    

  Dir.glob("/proc/*/environ").each do |p|
    pid=p.split("/")[2].to_i
  all_procs[pid]=true
    begin
      File.read(p).split("\000").each do |env_item|
        key,value=env_item.split("=")
        next unless(key == ENVIRONMENT_KEY)
        procs[value] ||= []
        procs[value] << pid
      end
    rescue Errno::EACCES => e
      next
    rescue Errno::ENOENT => e
      next
    rescue Exception => e
next
    end
  end
  
@@all_processes=all_procs
  @@processes=procs
  
  procs
end

.scan_processes_osx ⇒ Object 



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# File 'lib/process_util.rb', line 105

def scan_processes_osx
  all_procs={}
  procs={}   
  
  `ps axe`.split("\n").each do |l|
    s=l.split
    next if(s[0] == "USER")
    pid=s[0].to_i
    all_procs[pid]=true
    (5..(s.length-1)).each do |q|
      key,value=s[q].split("=")
      next unless(key == ENVIRONMENT_KEY && value)
      procs[value] ||= []
      procs[value] << pid
    end
  end
  
  @@all_processes=all_procs
   @@processes=procs
  procs
end