Module: UnixPs

Defined in:
lib/unix-ps.rb,
lib/unix-ps/version.rb,
lib/unix-ps/unix_process.rb

Defined Under Namespace

Classes: UnixProcess

Constant Summary collapse

DELIM =

Subject to change, hopefully this does not cause issues

"!"
VERSION = 
"0.0.8"

Class Method Summary collapse

Class Method Details

.processes(search = nil) ⇒ Object 



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# File 'lib/unix-ps.rb', line 11

def self.processes(search=nil)

  # Get ps aux output.
  #TODO: Handle errors
  ps_output = `ps aux`

  # Store the output in a temporary file so we can operate on the data without
  # losing consistency.
  file = Tempfile.new('unix-ps')
  file.write(ps_output)
  file.close

  # Lines to create process objects from
  lines = nil

  if search.is_a? String
    lines = `grep #{search} #{file.path}| awk '{print #{@columns}}'`.lines
    command_columns = `grep #{search} #{file.path}| awk '{#{@command_column}}'`.lines
    
    # Merge columns + command column
    lines = lines.each_with_index.map {|line, index|
      line = line.split(DELIM)
      command = command_columns[index].strip
      line.push(command)
    }
  else
    lines = `cat #{file.path} | awk '{print #{@columns}}'`.lines
    command_columns = `cat #{file.path}| awk '{#{@command_column}}'`.lines
    
    # Merge columns + command column
    lines = lines.each_with_index.map {|line, index|
      line = line.split(DELIM)
      command = command_columns[index].strip
      line.push(command)
    }

    # Pop off header columns
    lines.shift
  end

  file.unlink

  # Generate objects
  lines.collect { |line| UnixProcess.new(line) }
end