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

Backport PR : qtconsole: wrap argument list in tooltip to match width of text body...

Backport PR : qtconsole: wrap argument list in tooltip to match width of text body previously, a function with a long argument list would produce a very wide tooltip, hurting readability. Since the width of the docstring body is chosen by the developer whereas the formatting of the argument list is currently not, it's reasonable to wrap the argument list width to the maximum of a) 80 characters, or b) maximum length of a line in the docstring body. This improves readability, without unduly affecting the appearence of the docstring body itself. closes I'm happy to add any additional tests or make any changes required to get this merged.

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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)