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 62 62: def Pid.dir(dir_mode, dir, script) 63: # nil script parameter is allowed as long as dir_mode is not :script 64: return nil if dir_mode == :script && script.nil? 65: 66: case dir_mode 67: when :normal 68: return File.expand_path(dir) 69: when :script 70: return File.expand_path(File.join(File.dirname(script),dir)) 71: when :system 72: return '/var/run' 73: else 74: raise Error.new("pid file mode '#{dir_mode}' not implemented") 75: end 76: end
Initialization method
# File lib/daemons/pid.rb, line 79 79: def initialize 80: end
# File lib/daemons/pid.rb, line 7 7: def Pid.running?(pid) 8: return false unless pid 9: 10: # Check if process is in existence 11: # The simplest way to do this is to send signal '0' 12: # (which is a single system call) that doesn't actually 13: # send a signal 14: begin 15: Process.kill(0, pid) 16: return true 17: rescue Errno::ESRCH 18: return false 19: rescue ::Exception # for example on EPERM (process exists but does not belong to us) 20: return true 21: #rescue Errno::EPERM 22: # return false 23: end 24: end
Cleanup method
# File lib/daemons/pid.rb, line 97 97: def cleanup 98: end
Exist? method
# File lib/daemons/pid.rb, line 101 101: def exist? 102: true 103: end
Disabled; run with --debug to generate this.
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