Re: [gentoo-dev] showing file diffs as root

[Francesco R <vivo75@gmail.com>]

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why not make a temporary copy of the files with appropriate permission,
send a message the application the user originally opened to diff the files,
then apply the user modified file and cleanup the $tmpdir?

This would leave the user the possibility to choose whatever application she
want to do the merge, which is a big plus.

2010/5/30 Christopher Harvey <chris@basementcode.com>

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> Hello gentoo-dev,
>
> I'm working on an app for GSoC that needs to show a diff of two files
> to the user. Right now I've just been calling meld from the python
> os.system call. I tried running my application as root to show diffs
> of system files that belong to root. I got this error:
>
> Traceback (most recent call last):
>  File "/usr/bin/meld", line 90, in <module>
>    meldapp.main()
>  File "/usr/lib/meld/meldapp.py", line 982, in main
>    app = MeldApp()
>  File "/usr/lib/meld/meldapp.py", line 562, in __init__
>    self.prefs = MeldPreferences()
>  File "/usr/lib/meld/meldapp.py", line 435, in __init__
>    super(MeldPreferences, self).__init__("/apps/meld", self.defaults)
>  File "/usr/lib/meld/prefs.py", line 92, in __init__
>    self._gconf.add_dir(rootkey, gconf.CLIENT_PRELOAD_NONE)
> glib.GError: Failed to contact configuration server; some possible
> causes are that you need to enable TCP/IP networking for ORBit, or you
> have stale NFS locks due to a system crash. See
> http://projects.gnome.org/gconf/ for information. (Details -  1:
> Failed to get connection to session: Did not receive a reply. Possible
> causes include: the remote application did not send a reply, the
> message bus security policy blocked the reply, the reply timeout
> expired, or the network connection was broken.)
>
> I haven't looked into why this is happening very much because calling
> os.system("meld file1 file2 &") in python is putting up so many red
> flags in my head it's not funny. If anybody could tell me the proper
> gentoo/linux/python way to present a root level diff to a user running
> a program through su or sudo I'd really appreciate the help.
>
> thanks,
> Chris
>
> - --
> My GnuPGP key at:
> www.basementcode.com/public_key.txt
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