[Tfug] [tfug] Announcing runfs

[Jude Nelson]

That could be a good use-case :)  Just as long as the process that created
the plaintext doesn't die until after you're done editing and re-encrypting
it (and your file fits in RAM).

On Wed, Oct 29, 2014 at 1:04 PM, Ryan Cresawn <jrcresawn at gmail.com> wrote:

> I imagine runfs would be useful as a temporary storage location for
> encryption software. If you use miniLock, GPG, or PGP you know that those
> programs all need a place to store a plaintext file after it is decrypted.
> Let's say you have a text file you store passwords in. You decrypt the file
> to your home directory, make a change to its contents, and encrypt the
> file. Did you remember to remove the plaintext version from your
> filesystem? Jude, do you think this would be a reasonable use runfs or am I
> way off?
>
> On Tue Oct 28 2014 at 12:01:26 PM Jude Nelson <judecn at gmail.com> wrote:
>
>> Well, it's a FUSE filesystem, so you just run it as follows:
>>
>> $ runfs /path/to/mountpoint
>>
>> Once mounted, it looks like and behaves like tmpfs, but if a process
>> creates a file in it and dies, the file gets removed automatically.
>>
>> It's meant for holding things like PID files, lock files, UNIX domain
>> sockets and named pipes, which aren't supposed to live longer than the
>> process that created them anyway.  You could use it along side (or in place
>> of) tmpfs on /run.  I've been getting a lot of mileage out of it for
>> testing other programs that create temporary files like these but crash
>> before they can clean up.
>>
>> I can make some debs and rpms for runfs and fskit, if anyone's interested
>> :)
>>
>> -Jude
>>
>> On Tue, Oct 28, 2014 at 2:29 PM, Keith Smith <techlists at phpcoderusa.com>
>> wrote:
>>
>>>
>>> Not sure how I would use something like this as a LAMP developer.
>>>
>>> Your gizmo seems really cool.  How would one use it?
>>>
>>>
>>> On 2014-10-27 21:36, Jude Nelson wrote:
>>>
>>>> Thanks!  I just wrote up a short blurb and example on it here, if
>>>> you're
>>>> interested: http://judecnelson.blogspot.com/2014/10/runfs-
>>>> self-cleaning-ram-filesystem.html
>>>> [4]
>>>>
>>>> On Mon, Oct 27, 2014 at 8:35 PM, Keith Smith
>>>> <techlists at phpcoderusa.com> wrote:
>>>>
>>>>  Cool & Congrats!!
>>>>>
>>>>> On 2014-10-27 15:22, Jude Nelson wrote:
>>>>>
>>>>>  Hey everyone,
>>>>>>
>>>>>> In case anyone's interested, I've created an in-RAM filesystem
>>>>>> called
>>>>>> runfs for storing temporary files (similar to what /run is used
>>>>>> for).  The key difference is that once the process that creates
>>>>>> the
>>>>>> files dies, runfs automatically removes them.  You don't have to
>>>>>> worry about old PID files and sockets getting left around.
>>>>>>
>>>>>> The source code is here:  https://github.com/jcnelson/runfs [1]
>>>>>> [1]
>>>>>>
>>>>>> It's built with a filesystem SDK I also wrote, called fskit.
>>>>>> It's
>>>>>> code is here:  https://github.com/jcnelson/fskit [2] [2]
>>>>>>
>>>>>> Building and installing is super-simple:  just make and make
>>>>>> install.
>>>>>>
>>>>>> Any/all feedback welcome :)
>>>>>>
>>>>>> -Jude
>>>>>>
>>>>>> PS  This is the first of a few filesystems I intend to create.
>>>>>> Another one I'm working on will replace udev, and unlike udev, it
>>>>>> will
>>>>>> filter inodes based on the process that's asking and change their
>>>>>> permissions.  This will let e.g. the X server access /dev/dri
>>>>>> and
>>>>>> /dev/event/* without root or setuid, and will block all other
>>>>>> programs
>>>>>> from accessing them.
>>>>>>
>>>>>> Links:
>>>>>> ------
>>>>>> [1] https://github.com/jcnelson/runfs [1]
>>>>>> [2] https://github.com/jcnelson/fskit [2]
>>>>>>
>>>>>> _______________________________________________
>>>>>> Tucson Free Unix Group - tfug at tfug.org
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>>>>>>
>>>>>
>>>>> --
>>>>> Keith Smith
>>>>>
>>>>> _______________________________________________
>>>>> Tucson Free Unix Group - tfug at tfug.org
>>>>> Subscription Options:
>>>>> http://www.tfug.org/mailman/listinfo/tfug_tfug.org [3]
>>>>>
>>>>
>>>>
>>>>
>>>> Links:
>>>> ------
>>>> [1] https://github.com/jcnelson/runfs
>>>> [2] https://github.com/jcnelson/fskit
>>>> [3] http://www.tfug.org/mailman/listinfo/tfug_tfug.org
>>>> [4]
>>>> http://judecnelson.blogspot.com/2014/10/runfs-self-cleaning-
>>>> ram-filesystem.html
>>>>
>>>> _______________________________________________
>>>> Tucson Free Unix Group - tfug at tfug.org
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>>>
>>> --
>>> Keith Smith
>>>
>>> _______________________________________________
>>> Tucson Free Unix Group - tfug at tfug.org
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>>
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>
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