Returns the directory that should be used to write the pid file to depending on the given mode.
Some modes may require an additionaly hint, others may determine the directory automatically.
If no valid directory is found, returns nil.
# File lib/daemons/pid.rb, line 60 def Pid.dir(dir_mode, dir, script) # nil script parameter is allowed as long as dir_mode is not :script return nil if dir_mode == :script && script.nil? case dir_mode when :normal return File.expand_path(dir) when :script return File.expand_path(File.join(File.dirname(script),dir)) when :system return '/var/run' else raise Error.new("pid file mode '#{dir_mode}' not implemented") end end
Initialization method
# File lib/daemons/pid.rb, line 77 def initialize end
# File lib/daemons/pid.rb, line 8 def Pid.running?(pid) # Check if process is in existence # The simplest way to do this is to send signal '0' # (which is a single system call) that doesn't actually # send a signal begin Process.kill(0, pid) return true rescue Errno::ESRCH return false rescue ::Exception # for example on EPERM (process exists but does not belong to us) return true #rescue Errno::EPERM # return false end end
Generated with the Darkfish Rdoc Generator 2.