[syslinux] Possible to persist data across reboots from Lua?

Frank Hunleth fhunleth at troodon-software.com
Fri Jan 27 13:34:44 PST 2017

On Fri, Jan 27, 2017 at 7:54 AM, Ferenc Wágner <wferi at niif.hu> wrote:
> Frank Hunleth via Syslinux <syslinux at zytor.com> writes:
>> I'd like to be able to save a boolean value across reboots. I believe
>> that being able to store to the auxiliary data vector would satisfy
>> this need, but I'm using syslinux and that doesn't seem to be
>> implemented.
> It's implemented in the Syslinux API, just not exported to Lua.
>> While I'm currently using a Lua script, I'm not tied to it, so if
>> there's a way to read and write any persistent filesystem or disk, I'd
>> be happy to switch.
> I think the best would be adding Lua bindings for syslinux_getadv(),
> syslinux_setadv(), syslinux_adv_write(), syslinux_adv_size() and the
> BOOTONCE and MENUSAVE tags.  And define some policy for allocating new
> tags... which is the hard part.

Thanks. That points me in the right direction for where to look.


>> Reading through the source code, it seems like most filesystem
>> operations are read-only
> Yes, the filesystem drivers in Syslinux are read-only.
> --
> Feri

Frank Hunleth
Troodon Software LLC
Embedded Software Development

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