Module: HelperClasses::System

Extended by:
DPuts, System
Includes:
DPuts
Included in:
System
Defined in:
lib/helper_classes/system.rb

Instance Attribute Summary

Attributes included from DPuts

#log_file, #logall_file, #max_msg_len, #mutex, #show_time, #silent, #terminal_width

Instance Method Summary collapse

Methods included from DPuts

ddputs, dlog_msg, dp, dputs, dputs_func, dputs_getcaller, dputs_out, dputs_unfunc, dputs_write, log_msg, logfile_valid

Instance Method Details

#exists?(cmd) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/helper_classes/system.rb', line 20

def exists?(cmd)
  dputs(3) { "Exist command --#{cmd}--?" }
  run_bool("which #{cmd} > /dev/null 2>&1")
end

#iptables(*args, check: false) ⇒ Object 



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# File 'lib/helper_classes/system.rb', line 37

def iptables(*args, check: false)
  if !@iptables_cmd
    if System.exists?('iptables')
      @iptables_cmd = 'iptables'
      @iptables_wait = (System.run_str('iptables --help') =~ /\s-w\s/) ? '-w' : ''
    else
      @iptables_cmd = ''
    end
  end

  if @iptables_cmd != ''
    if check
      System.run_bool("#{@iptables_cmd} #{@iptables_wait} #{args.join(' ')} 2>/dev/null")
    else
      System.run_str("#{@iptables_cmd} #{@iptables_wait} #{args.join(' ')}")
    end
  else
    return ''
  end
end

#ntpd_wait(n = 60) ⇒ Object

Waits for NTP to be synchronized or for n seconds



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# File 'lib/helper_classes/system.rb', line 69

def ntpd_wait(n = 60)
  Thread.new {
    System.rescue_all do
      (1..n).each {
        break if System.ntpdoffset
        sleep 1
      }
      yield
    end
  }
end

#ntpdoffset ⇒ Object

Returns the offset of the ntpd-synchronization: nil -> not synchronized else -> synchronization in ms



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# File 'lib/helper_classes/system.rb', line 84

def ntpdoffset
  ret = System.run_str('ntpq -c "rv 0 stratum,offset"')
  return nil if ret =~ /connection refused/i
  stratum, offset = ret.split(/, /).collect { |s| s.gsub(/.*=/, '') }
  #return nil if stratum == '16'
  return offset.to_f
end

#ntpdstratum ⇒ Object

Returns the stratum of the ntpd-synchronization: 16 -> not synchronized 2..15 -> synchronized



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# File 'lib/helper_classes/system.rb', line 61

def ntpdstratum
  ret = System.run_str('ntpq -c "rv 0 stratum"')
  return 16 if ret =~ /connection refused/i
  stratum = ret.gsub(/.*=/, '')
  return stratum.to_i
end

#rescue_all(msg = 'Error') ⇒ Object 



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# File 'lib/helper_classes/system.rb', line 25

def rescue_all(msg = 'Error')
  begin
    yield
  rescue StandardError => e
    dputs(0) { "#{Time.now.strftime('%a %y.%m.%d-%H:%M:%S')} - #{msg}" }
    dputs(0) { "#{e.inspect}" }
    dputs(0) { "#{e.to_s}" }
    e.backtrace.each { |l| dputs(0) { l } }
    return false
  end
end

#run_bool(cmd) ⇒ Object 



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# File 'lib/helper_classes/system.rb', line 15

def run_bool(cmd)
  dputs(3) { "Running command --#{cmd}--" }
  Kernel.system("#{cmd} > /dev/null 2>&1")
end

#run_str(cmd) ⇒ Object 



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# File 'lib/helper_classes/system.rb', line 10

def run_str(cmd)
  dputs(3) { "Running command --#{cmd}--" }
  %x[ #{cmd} ]
end