upstream/ipython Files · IPython/utils/daemonize.py

prevent widget shortcut conflicts with menu proxies...

prevent widget shortcut conflicts with menu proxies set some menu bar contexts to Widget, preventing conflict. Essentially, these events will never be called by shortcut, as the events for which they are a proxy are already bound to the shortcut, and get it instead. This is a bit ugly, because the menu shortcuts aren't really active - they depend on the widget shortcuts being the same.

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      """daemonize function from twisted.scripts._twistd_unix."""

      #-----------------------------------------------------------------------------

      # Copyright (c) Twisted Matrix Laboratories.

      # See Twisted's LICENSE for details.

      # http://twistedmatrix.com/

      #-----------------------------------------------------------------------------

      import os, errno

      def daemonize():

          # See http://www.erlenstar.demon.co.uk/unix/faq_toc.html#TOC16

          if os.fork():   # launch child and...

              os._exit(0) # kill off parent

          os.setsid()

          if os.fork():   # launch child and...

              os._exit(0) # kill off parent again.

          null = os.open('/dev/null', os.O_RDWR)

          for i in range(3):

              try:

                  os.dup2(null, i)

              except OSError, e:

                  if e.errno != errno.EBADF:

                      raise

          os.close(null)

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				"""daemonize function from twisted.scripts._twistd_unix."""

				#-----------------------------------------------------------------------------
				# Copyright (c) Twisted Matrix Laboratories.
				# See Twisted's LICENSE for details.
				# http://twistedmatrix.com/
				#-----------------------------------------------------------------------------

				import os, errno

				def daemonize():
				# See http://www.erlenstar.demon.co.uk/unix/faq_toc.html#TOC16
				if os.fork(): # launch child and...
				os._exit(0) # kill off parent
				os.setsid()
				if os.fork(): # launch child and...
				os._exit(0) # kill off parent again.
				null = os.open('/dev/null', os.O_RDWR)
				for i in range(3):
				try:
				os.dup2(null, i)
				except OSError, e:
				if e.errno != errno.EBADF:
				raise
				os.close(null)