421     if pycompat.sysplatform == b'OpenVMS' and rc & 1:

   421     if pycompat.sysplatform == b'OpenVMS' and rc & 1:

   422         rc = 0

   422         rc = 0

   423     return rc

   423     return rc

   424 

   424 

   425 

   425 

   427     '''Are we running in a GUI?'''

   430     '''Are we running in a GUI?'''

   428     if pycompat.isdarwin:

   431     if pycompat.isdarwin:

   429         if b'SSH_CONNECTION' in encoding.environ:

   432         if b'SSH_CONNECTION' in encoding.environ:

   430             # handle SSH access to a box where the user is logged in

   433             # handle SSH access to a box where the user is logged in

   431             return False

   434             return False

   435         else:

   438         else:

   436             # pure build; use a safe default

   439             # pure build; use a safe default

   437             return True

   440             return True

   438     else:

   441     else:

   439         return pycompat.iswindows or encoding.environ.get(b"DISPLAY")

   442         return pycompat.iswindows or encoding.environ.get(b"DISPLAY")

   440 

   450 

   441 

   451 

   442 def hgcmd():

   452 def hgcmd():

   443     """Return the command used to execute current hg

   453     """Return the command used to execute current hg

   444 

   454 

   581         When `record_wait` is not None, the spawned process will not be fully

   591         When `record_wait` is not None, the spawned process will not be fully

   582         detached and the `record_wait` argument will be called with a the

   592         detached and the `record_wait` argument will be called with a the

   583         `Subprocess.wait` function for the spawned process.  This is mostly

   593         `Subprocess.wait` function for the spawned process.  This is mostly

   584         useful for developers that need to make sure the spawned process

   594         useful for developers that need to make sure the spawned process

   585         finished before a certain point. (eg: writing test)'''

   595         finished before a certain point. (eg: writing test)'''

   586         # double-fork to completely detach from the parent process

   601         # double-fork to completely detach from the parent process

   587         # based on http://code.activestate.com/recipes/278731

   602         # based on http://code.activestate.com/recipes/278731

   588         if record_wait is None:

   603         if record_wait is None:

   589             pid = os.fork()

   604             pid = os.fork()

   590             if pid:

   605             if pid: