January 12 four weeks five times "Python Foundation Advanced"

3.5 RC Script (definition of class and structure of script)
3.6 rc Script (Start method)
3.7 RC script (stop and Status method)
3.8 RC script (starts in daemon mode)

3.5 RC Script (definition of class and structure of script)/3.6 RC script (Start method)/3.7 RC script (stop and Status method)

Import sysimport osfrom subprocess import Popen, Pipeclass Process (object): ' memcached rc script ' def __init__ (s Elf, name, program, args, workdir): self.name = name Self.program = Program Self.args = args s            Elf.workdir = Workdir def _init (self): "/var/tmp/memcached" if not os.path.exists (Self.workdir): Os.mkdir (Self.workdir) Os.chdir (SELF.WORKDIR) def _pidfile (self): "'/VAR/TMP/MEMCACHED/MEMCAC            Hed.pid "Return Os.path.join (Self.workdir,"%s.pid "% self.name) def _writhpid (self): if self.pid: With open (Self._pidfile (), ' W ') as Fd:fd.write (str (self.pid)) def start (self): PID = self        . _getpid () If Pid:print ("%s is running ..."% self.name) sys.exit () Self._init ()        cmd = self.program + ' + Self.args p = Popen (cmd, stdout = PIPE, Shell = True) Self.pid = P.pid        Self._writhpid ()Print ("%s start sucessful"% self.name) def _getpid (self): p = Popen ([' pidof ', self.name], stdout = PIPE)            PID = P.stdout.read (). Strip () return PID def stop (self): PID = Self._getpid () if PID:            Os.kill (int (PID), +) if Os.path.exists (Self._pidfile ()): Os.remove (Self._pidfile ())        Print ("%s is stopped"% self.name) def restart (self): Self.stop () Self.start () def status: PID = Self._getpid () If Pid:print ("%s is already running"% self.name) Else:print ( '%s is not running '% self.name) def help (self): print ("Usage: {start | Stop | Startus | Restart} "% __file__) def main (): name = ' memcached ' prog = '/usr/bin/memcached ' args = '-u nobody-p 11211-c 102        4-m ' WD = '/var/tmp/memcached ' PM = Process (name = name, program = prog, args = args, Workdir = wd) Try: cmd = sys.argv[1] except Indexerror as E: Print ("Option error") Sys.exit () if cmd = = ' Start ': Pm.start () elif cmd = = ' Stop ': PM . Stop () elif cmd = = ' Restart ': Pm.restart () elif cmd = = ' status ': Pm.status () Else:pm.help ( if __name__ = = ' __main__ ': Main ()

3.8 RC script (starts in daemon mode)

Import sysimport osfrom subprocess import Popen, Pipeclass Process (object): ' memcached rc script ' ' args = {' USER ' : ' memcached ', ' PORT ': 11211, ' maxconn ': 1024x768, ' CACHESIZE ': +, ' OPTIONS ': '} def __init__ (self, Name, program, W Orkdir): self.name = name Self.program = Program Self.workdir = Workdir def _init (self): ' '/var/tmp/memcached ' if not os.path.exists (Self.workdir): Os.mkdir (Self.workdir) Os.chdir (s  ELF.WORKDIR) def _pidfile (self): '/var/tmp/memcached/memcached.pid ' return Os.path.join (Self.workdir,                "%s.pid"% self.name) def _writhpid (self): if Self.pid:with open (Self._pidfile (), ' W ') as FD:            Fd.write (str (self.pid)) def _readconf (self, f): with open (f) as Fd:lines = Fd.readlines () Return Dict ([I.strip (). Replace (' "', '). Split (' = ') for i in lines]) def _parseargs (self): conf = self . _readconf ('/etc/sysconfIg/memcached ') If ' user ' in conf:self.args[' user '] = conf[' user ' "if ' PORT ' in conf: self.args[' Port ' = conf[' port '] if ' maxconn ' in conf:self.args[' maxconn '] = conf[' maxconn '] if ' CACHESIZE ' in conf:self.args[' CACHESIZE ') = conf[' CACHESIZE '] if ' OPTIONS ' in conf:self.ar                   gs[' options ' = conf[' options '] options = ['-U ', self.args[' USER '], '-P ', self.args[' PORT ',  '-C ', self.args[' maxconn '], '-M ', self.args[' CACHESIZE '] Os.system ("chown%s%s"%        (self.args[' USER '], Self.workdir)) Return Options def start: pid = Self._getpid () If Pid:print ("%s is running ..."% self. Name) Sys.exit () self._init () cmd = [Self.program] + Self._parseargs () + ['-d ', '-P ', SELF._PIDFI Le ()] print (cmd) p = Popen (cmd, stdout = PIPE) #self. PID = P.pid #self. _wriThpid () print ("%s start sucessful"% self.name) def _getpid (self): p = Popen ([' pidof ', self.name], stdout = PIPE) pid = P.stdout.read (). Strip () return PID def stop (self): PID = Self._getpid () if p Id:os.kill (int (PID), +) if Os.path.exists (Self._pidfile ()): Os.remove (self._pidfile ()) Print ("%s is stopped"% self.name) def restart (self): Self.stop () Self.start () def stat            US (self): PID = Self._getpid () If Pid:print ("%s is already running"% self.name) Else: Print ("%s is not running"% self.name) def help (self): print ("Usage: {start | Stop | Startus | Restart} "% __file__) def main (): name = ' memcached ' prog = '/usr/bin/memcached ' args = '-u nobody-p 11211-c 102 4-m ' WD = '/var/tmp/memcached ' PM = Process (name = name, program = prog, Workdir = wd) Try:cmd = sys. ARGV[1] except Indexerror as E:print ("Option error") Sys.exit () if cmd = = ' Start ': Pm.start () elif cmd = = ' Stop ': Pm.stop () elif cmd = = ' Restart ': Pm.restart () elif cmd = = ' status ': Pm.status () Else:pm.hel P () if __name__ = = ' __main__ ': Main ()

January 12 four weeks five times "Python Foundation Advanced"