[PATCH] PCI device enumeration for lua

[Evan Broder]

Hi -
    This patch adds anew enum_pci(callback) function to the Lua grub
library for enumerating devices on the PCI bus. This is not currently
possible because there's no way to get the output of a command from
grub.run.

While I think that would be useful to have in the more general case,
in this particular case using the internal grub_pci_iterate function
is better, because it keeps Lua code from having to parse the lengthy
output from the lspci command.

The callback function passed to enum_pci is called once for each
device found: the bus index, the device index, the function index, the
PCI ID as a single numeric value, and the device class.

Thanks,
 - Evan

grub_lua_enum_pci.diff
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