Install failing and leaving unusable system

[Julian Hall]

I know this has been discussed here before, but it seems that it's 
something that happens to a lot of people, so it should probably be 
fixed.  It seems as though a fairly simple update to the setup program 
might be helpful to people who have the problem.  In script.cc, there 
are currently lines that read:

  if (retval)
    log(LOG_PLAIN) << "abnormal exit: exit code=" << retval << endLog;;

  /* if file exists then delete it otherwise just ignore no file error */
  io_stream::remove ("cygfile://" + scriptName + ".done");

  io_stream::move ("cygfile://" + scriptName,
                   "cygfile://" + scriptName + ".done");

I'd suggest changing them so that the destination filename in the case 
of an abnormal exit is different (e.g. scriptName + ".failed").  A flag 
could then be set so that a dialog box is shown at the end, stating that 
errors occurred running the postinstall scripts, and directing users to 
a simple shell script that can be run after rebooting, which will run 
all the /etc/postinstall/*.failed scripts and move them to appropraite 
".done" names.

Does that sound like a sensible idea?

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