Decode signal masks Sig* in /proc/PID/status

sigmask.rb

#!/usr/bin/env ruby
#
# Decode signal masks Sig* in /proc/PID/status
# See function render_sigset_t in kernel source fs/proc/array.c
#

class SIGMask
  def self.signame(signo)
    sig = Signal::list.invert[signo]
    if sig
      "SIG" + sig
    else
      signo
    end
  end

  def self.decode(mask)
    # echo "#include <signal.h>" | gcc -dM -E -  | grep define._NSIG
    _NSIG = 65
    signals = []
    pos = 1
    mask.split('').each do |m|
      i = _NSIG - (pos * 4)
      bm = { 1=> 1, 2 => 2, 4 => 3, 8 => 4 }
      bm.each do |k,v|
        if (m.to_i(base=16) & k) == k
          signals.push signame(i + bm[k])
        end
      end
      pos += 1
    end
    signals
  end
end

puts SIGMask.decode ARGV[0] if ARGV[0]

@bdlow, how ?

Complete app https://github.com/r4um/sigmask