Signals on different platforms.

signal_check.rb

######################################################
# This is to check what signals are available from the
# command line on different platforms.
#
# === Results
#
# Mac:
#   ctrl-T: INFO
#   ctrl-\: QUIT
#   ctrl-Z: TSTP
#   ctrl-C: INT
#
# Windows:
#   ctrl-C: INT
#
# === Note (wikipedia)
# SIGINT    terminal interrupt Ctrl-C (this causes the process to terminate)
# SIGQUIT   terminal quit Ctrl-\ (this causes the process to terminate and dump core)
# SIGTSTP   terminal stop Ctrl-Z (this causes the process to suspend execution)
#
######################################################

# forbidden to trap on mac
forbidden = %w{
  SIGVTALRM
}

Signal.list.each_pair do |key, value|
  next if forbidden.include?("SIG" + key)
  Signal.trap(key) do
    puts "#{key}: #{value}"
  end
end

loop do
  exit if gets.strip == "exit"
end