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module Oxidized
class CLI
require 'oxidized'
require 'slop'
def run
check_pid
Process.daemon if @opts[:daemonize]
write_pid
begin
Oxidized.new
rescue => error
crash error
raise
end
end
private
def initialize
Log.info "Oxidized starting, running as pid #{$$}"
_args, @opts = parse_opts
Oxidized.config.debug = true if @opts[:debug]
@pidfile = File.expand_path("pid")
end
def crash error
Log.fatal "Oxidized crashed, crashfile written in #{Config::Crash}"
open Config::Crash, 'w' do |file|
file.puts '-' * 50
file.puts Time.now.utc
file.puts error.message + ' [' + error.class.to_s + ']'
file.puts '-' * 50
file.puts error.backtrace
file.puts '-' * 50
end
end
def parse_opts
opts = Slop.new(:help=>true) do
on 'd', 'debug', 'turn on debugging'
on 'daemonize', 'Daemonize/fork the process'
end
[opts.parse!, opts]
end
def pidfile
@pidfile
end
def pidfile?
!!pidfile
end
def write_pid
if pidfile?
begin
File.open(pidfile, ::File::CREAT | ::File::EXCL | ::File::WRONLY){|f| f.write("#{Process.pid}") }
at_exit { File.delete(pidfile) if File.exists?(pidfile) }
rescue Errno::EEXIST
check_pid
retry
end
end
end
def check_pid
if pidfile?
case pid_status(pidfile)
when :running, :not_owned
puts "A server is already running. Check #{pidfile}"
exit(1)
when :dead
File.delete(pidfile)
end
end
end
def pid_status(pidfile)
return :exited unless File.exists?(pidfile)
pid = ::File.read(pidfile).to_i
return :dead if pid == 0
Process.kill(0, pid)
:running
rescue Errno::ESRCH
:dead
rescue Errno::EPERM
:not_owned
end
end
end
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