def run(self): """ The main program skeleton. """ log_total = True try: try: # Preparation steps self.get_options() # Template method with the tool's main loop self.mainloop() except error.LoggableError, exc: if self.options.debug: raise # Log errors caused by invalid user input try: msg = str(exc) except UnicodeError: msg = unicode(exc, "UTF-8") self.LOG.error(msg) sys.exit(error.EX_SOFTWARE) except KeyboardInterrupt, exc: if self.options.debug: raise sys.stderr.write("\n\nAborted by CTRL-C!\n") sys.stderr.flush() # See https://www.cons.org/cracauer/sigint.html signal.signal(signal.SIGINT, signal.SIG_DFL) os.kill(os.getpid(), signal.SIGINT) sys.exit(error.EX_TEMPFAIL) # being paranoid
def daemonize(pidfile=None, logfile=None, sync=True): """ Fork the process into the background. @param pidfile: Optional PID file path. @param sync: Wait for parent process to disappear? @param logfile: Optional name of stdin/stderr log file or stream. """ log = logging.getLogger("daemonize") ppid = os.getpid() try: pid = os.fork() if pid > 0: log.debug("Parent exiting (PID %d, CHILD %d)" % (ppid, pid)) sys.exit(0) except OSError, e: log.critical("fork #1 failed (PID %d): (%d) %s\n" % (os.getpid(), e.errno, e.strerror)) sys.exit(1)
def _write_pidfile(pidfile): """ Write file with current process ID. """ pid = str(os.getpid()) handle = open(pidfile, 'w') try: handle.write("%s\n" % pid) finally: handle.close()
pid = os.fork() if pid > 0: log.debug("Parent exiting (PID %d, CHILD %d)" % (ppid, pid)) sys.exit(0) except OSError, e: log.critical("fork #1 failed (PID %d): (%d) %s\n" % (os.getpid(), e.errno, e.strerror)) sys.exit(1) ##os.chdir("/") ##os.umask(0022) os.setsid() try: pid = os.fork() if pid > 0: log.debug("Session leader exiting (PID %d, PPID %d, DEMON %d)" % (os.getpid(), ppid, pid)) sys.exit(0) except OSError, e: log.critical("fork #2 failed (PID %d): (%d) %s\n" % (os.getpid(), e.errno, e.strerror)) sys.exit(1) if pidfile: _write_pidfile(pidfile) def sig_term(*dummy): "Handler for SIGTERM." sys.exit(0) stdin = open("/dev/null", "r") os.dup2(stdin.fileno(), sys.stdin.fileno()) signal.signal(signal.SIGTERM, sig_term)
def daemonize(pidfile=None, logfile=None, sync=True): """ Fork the process into the background. @param pidfile: Optional PID file path. @param sync: Wait for parent process to disappear? @param logfile: Optional name of stdin/stderr log file or stream. """ log = logging.getLogger("daemonize") ppid = os.getpid() try: pid = os.fork() if pid > 0: log.debug("Parent exiting (PID %d, CHILD %d)" % (ppid, pid)) sys.exit(0) except OSError as exc: log.critical("fork #1 failed (PID %d): (%d) %s\n" % (os.getpid(), exc.errno, exc.strerror)) sys.exit(1) ##os.chdir("/") ##os.umask(0022) os.setsid() try: pid = os.fork() if pid > 0: log.debug("Session leader exiting (PID %d, PPID %d, DEMON %d)" % (os.getpid(), ppid, pid)) sys.exit(0) except OSError as exc: log.critical("fork #2 failed (PID %d): (%d) %s\n" % (os.getpid(), exc.errno, exc.strerror)) sys.exit(1) if pidfile: _write_pidfile(pidfile) def sig_term(*dummy): "Handler for SIGTERM." sys.exit(0) stdin = open("/dev/null", "r") os.dup2(stdin.fileno(), sys.stdin.fileno()) signal.signal(signal.SIGTERM, sig_term) if logfile: try: logfile + "" except TypeError: if logfile.fileno() != sys.stdout.fileno(): os.dup2(logfile.fileno(), sys.stdout.fileno()) if logfile.fileno() != sys.stderr.fileno(): os.dup2(logfile.fileno(), sys.stderr.fileno()) else: log.debug("Redirecting stdout / stderr to %r" % logfile) loghandle = open(logfile, "a+") os.dup2(loghandle.fileno(), sys.stdout.fileno()) os.dup2(loghandle.fileno(), sys.stderr.fileno()) loghandle.close() if sync: # Wait for 5 seconds at most, in 10ms steps polling = 5, .01 for _ in range(int(polling[0] * 1 / polling[1])): try: os.kill(ppid, 0) except OSError: break else: time.sleep(polling[1]) log.debug("Process detached (PID %d)" % os.getpid())
log.debug("Parent exiting (PID %d, CHILD %d)" % (ppid, pid)) sys.exit(0) except OSError, e: log.critical("fork #1 failed (PID %d): (%d) %s\n" % (os.getpid(), e.errno, e.strerror)) sys.exit(1) ##os.chdir("/") ##os.umask(0022) os.setsid() try: pid = os.fork() if pid > 0: log.debug("Session leader exiting (PID %d, PPID %d, DEMON %d)" % (os.getpid(), ppid, pid)) sys.exit(0) except OSError, e: log.critical("fork #2 failed (PID %d): (%d) %s\n" % (os.getpid(), e.errno, e.strerror)) sys.exit(1) if pidfile: _write_pidfile(pidfile) def sig_term(*dummy): "Handler for SIGTERM." sys.exit(0) stdin = open("/dev/null", "r") os.dup2(stdin.fileno(), sys.stdin.fileno())