Query: file string search? about grub

[a1ive]

You could write lua scripts to do this.
Lua is much more powerful than grub2 bash-like scripts.

[steve6375]

It doesn't seem to have the io module for io.open, etc.
I think there is some file support...

-- globals.lua
-- show all global variables

local seen={}

function dump(t,i)
	seen[t]=true
	local s={}
	local n=0
	for k in pairs(t) do
		n=n+1 s[n]=k
	end
	table.sort(s)
	for k,v in ipairs(s) do
		print(i,v)
		v=t[v]
		if type(v)=="table" and not seen[v] then
			dump(v,i.."\t")
		end
	end
end

dump(_G,"")

e.g. but I have no idea how to use it.
I want to open the file
read in a line
use gsub to replace a string
write the line to another file (can be an existing file)
on an NTFS or FAT32 volume.

?? any hints please when you have time ??

[a1ive]

please upload you xml file, I will write an example tomorrow.

[steve6375]

infull.zip
That is very kind of you, thank you. I have never used lua and there seems to be no mention of 'file_getline' on Google for lua???

So I want to replace (in this example) all occurences of 'UNAME' with 'steve' and 'PCNAME' with 'ComputerA'

So a function like repl "searchstr" "replacestr" infile outfile
would be ideal
Note that the file has < and > and ! characters!

[a1ive]

abc.zip
Extract it to (hd0,1)/
and run lua (hd0,1)/write.lua

[a1ive]

abcd.zip
Extract it to (hd0,1)/
and run lua (hd0,1)/write.lua

[steve6375]

Thank you so much!
That had the examples I needed and I now have it working. :-) 💯

[a1ive]

That had the examples I needed and I now have it working. :-) 100

I forgot to run grub.file_close.Please add it.

file1 = grub.file_open ("(tar)/test.xml")
file2 = grub.file_open ("(tar)/empty.xml", "w")
uname = read_input ("UNAME")
pcname = read_input ("PCNAME")
search_replace (file1, file2, {"UNAME", "PCNAME"}, {uname, pcname})
grub.file_close (file1)
grub.file_close (file2)