Hi,
I've written two lua scripts that can automatically detect and boot
LiveCD iso files. I'm using these scripts on my USB-Stick, so I can just
put the LiveCD iso file on it and use it and don't have to use the
different LiveCD to USB tools, which often not allow more than one Live
System on one USB-Stick.
The first script listisos.lua lists all iso files in a specific folder.
The folder can be specified with an environment variable "isofolder" or
if it is not set it looks in "/boot/isos".
The second script bootiso.lua actually boots an iso file specified with
the "isofile" environment variable and is used for the menuentries that
the listisos.lua script creates. The following LiveCD types are
currently supported:
* Grml
* Sidux
* Ubuntu
#!lua
--
-- Copyright (C) 2009 Free Software Foundation, Inc.
--
-- GRUB is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- GRUB is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with GRUB. If not, see <http://www.gnu.org/licenses/>.
--
isofolder = grub.getenv ("isofolder")
if (isofolder == nil) then
isofolder = "/boot/isos"
end
function enum_file (name)
local title = string.match (name, "(.*)%.[iI][sS][oO]")
if (title) then
local source = "set isofile=" .. isofolder .. "/" .. name ..
"\nsource /boot/grub/bootiso.lua"
grub.add_menu (source, title)
end
end
grub.enum_file (enum_file, isofolder)
#!lua
--
-- Copyright (C) 2009 Free Software Foundation, Inc.
--
-- GRUB is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- GRUB is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with GRUB. If not, see <http://www.gnu.org/licenses/>.
--
function bootiso (isofile)
local err_no
local err_msg
local function print_error (msg)
print ("Error: " .. msg)
grub.run ("read")
end
local function find_file (folder, match)
local filename
local function enum_file (name)
if (filename == nil) then
filename = string.match (name, match)
end
end
grub.enum_file (enum_file, folder)
if (filename) then
return folder .. "/" .. filename
else
return nil
end
end
local function try_boot_generic ()
local grubcfg = "(loop)/boot/grub/grub.cfg"
if (grub.file_exist (grubcfg)) then
grub.run ("configfile " .. grubcfg)
return true
end
return false
end
local function try_boot_grml ()
local linux = "(loop)/boot/grml/linux26"
local initrd = "(loop)/boot/grml/initrd.gz"
local params = "findiso=" .. isofile ..
" apm=power-off vga=791 quiet boot=live nomce"
if (grub.file_exist ("(loop)/GRML/grml-version") and
grub.file_exist (linux) and
grub.file_exist (initrd)) then
grub.run ("linux " .. linux .. " " .. params)
grub.run ("initrd " .. initrd)
return true
end
return false
end
local function try_boot_sidux ()
local linux = find_file ("(loop)/boot", "vmlinuz%-.*%-sidux%-.*")
local initrd = find_file ("(loop)/boot", "initrd%.img%-.*%-sidux%-.*")
local params = "fromiso=" .. isofile .. " boot=fll quiet vga=791"
if (linux and grub.file_exist (linux) and
initrd and grub.file_exist (initrd)) then
grub.run ("linux " .. linux .. " " .. params)
grub.run ("initrd " .. initrd)
return true
end
return false
end
local function try_boot_ubuntu ()
local linux = "(loop)/casper/vmlinuz"
local initrd = "(loop)/casper/initrd.gz"
local params = "boot=casper iso-scan/filename=" .. isofile ..
" quiet splash noprompt --"
if (grub.file_exist ("(loop)/preseed/ubuntu.seed") and
grub.file_exist (linux) and
grub.file_exist (initrd)) then
grub.run ("linux " .. linux .. " " .. params)
grub.run ("initrd " .. initrd)
return true
end
return false
end
if (isofile == nil) then
print_error ("variable 'isofile' is undefined")
elseif (not grub.file_exist (isofile)) then
print_error ("file '" .. isofile .. "' does not exist")
else
err_no,err_msg = grub.run ("loopback loop " .. isofile)
if (err_no ~= 0) then
print_error ("Cannot load ISO: " .. err_msg)
else
if (try_boot_grml ()) then
elseif (try_boot_sidux ()) then
elseif (try_boot_ubuntu ()) then
elseif (try_boot_generic ()) then
else
print_error ("Unsupported ISO type")
end
end
end
end
bootiso (grub.getenv ("isofile"))
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