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Re: "here strings" and tmpfiles
From: |
Chet Ramey |
Subject: |
Re: "here strings" and tmpfiles |
Date: |
Wed, 10 Apr 2019 16:45:35 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 |
On 4/10/19 4:33 PM, konsolebox wrote:
> On Wed, Apr 10, 2019 at 11:15 PM Chet Ramey <chet.ramey@case.edu> wrote:
>> If we're going to go off into hypotheticals and speculation, it would be
>> nice if memfd_create were available universally.
>
> I see many parts in lib/* that adapts to available system features
> like mmap and MAP_ANONYMOUS. I don't see why memfd_create should be
> an exception. Using a volatile file is much better than forking, and
> this only requires a one-time implementation of a wrapper library
> function that returns -1 if the feature is not available in the
> system. It should be easy to integrate with the current code since it
> returns an fd.
It has slightly inconvenient semantics, in that you can't open it more
than once, and if you can't do that, you can't convert it from read-write
to readonly.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
- Re: "here strings" and tmpfiles, (continued)
- Re: "here strings" and tmpfiles, Robert Elz, 2019/04/09
- Re: "here strings" and tmpfiles, pepa65, 2019/04/09
- Re: "here strings" and tmpfiles, Robert Elz, 2019/04/09
- Re: "here strings" and tmpfiles, Greg Wooledge, 2019/04/09
- Re: "here strings" and tmpfiles, Chet Ramey, 2019/04/09
- Re: "here strings" and tmpfiles, L A Walsh, 2019/04/09
- Re: "here strings" and tmpfiles, Greg Wooledge, 2019/04/10
- Re: "here strings" and tmpfiles, Greg Wooledge, 2019/04/10
- Re: "here strings" and tmpfiles, Chet Ramey, 2019/04/10
- Re: "here strings" and tmpfiles, konsolebox, 2019/04/10
- Re: "here strings" and tmpfiles,
Chet Ramey <=
- Re: "here strings" and tmpfiles, konsolebox, 2019/04/10
- Re: "here strings" and tmpfiles, konsolebox, 2019/04/11
- Re: "here strings" and tmpfiles, Chet Ramey, 2019/04/12
- Re: "here strings" and tmpfiles, konsolebox, 2019/04/12
- Re: "here strings" and tmpfiles, Chet Ramey, 2019/04/10
- Re: "here strings" and tmpfiles, Jason A. Donenfeld, 2019/04/09
- Re: "here strings" and tmpfiles, Chet Ramey, 2019/04/10
- Re: "here strings" and tmpfiles, Daniel Kahn Gillmor, 2019/04/10
- Re: "here strings" and tmpfiles, Greg Wooledge, 2019/04/10
- Re: "here strings" and tmpfiles, Peter & Kelly Passchier, 2019/04/10