Re: Bug#903815: ITP: pw -- A simple command-line password manager
On 18 July 2018 at 00:00, Michael Stone <mstone@debian.org> wrote:
> On Mon, Jul 16, 2018 at 03:14:20PM +0200, Dashamir Hoxha wrote:
> >
> > It writes to `/dev/shm` which is not disk.
>
> All else that's been said aside, this idea is also dangerously incorrect in
> a typical configuration: the tmpfs backend will write to swap under memory
> pressure. (This is also true of the memory used by the process; if it's
> actually important to keep data from being written to persistent storage, it
> should be set unswappable using mlock. I have no idea how one would do this
> effectively in a shell script.)
It is possible, but ugly as hell in shell script. I did it in the
following old script using foregrounded memlockd invocation, but that
was written in shell script only really as an exercise in
boredom/masochism.
https://github.com/rowanthorpe/safe-key-setup/blob/master/safe-key-setup.sh#L131
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