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Re: [Qemu-devel] RFC: guest-side retrieval of fw_cfg file

From: Eric Blake
Subject: Re: [Qemu-devel] RFC: guest-side retrieval of fw_cfg file
Date: Mon, 13 Jul 2015 17:03:02 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 
On 07/13/2015 02:09 PM, Gabriel L. Somlo wrote:
> 2. File names are listed in /sys/fs/fw_cfg/... with slashes replaced
>    exclamation marks, e.g.:

Instead of inventing yet another escaping mechanism, can you mimic an
already existing convention such as systemd's escaping?

http://www.freedesktop.org/software/systemd/man/systemd-escape.html

> 
> # ls /sys/firmware/fw_cfg/
> bootorder           etc!e820                  etc!table-loader
> etc!acpi!rsdp       etc!smbios!smbios-anchor  genroms!kvmvapic.bin
> etc!acpi!tables     etc!smbios!smbios-tables
> etc!boot-fail-wait  etc!system-states

would name these files along the lines of 'etc-e820' and
'etc-boot\x2dfail\x2dwait', and the end user can then use systemd to
unescape the names.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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