Retrieve Username

Other
1

I am trying to detect the existence of file



function find_host_dbx(file_name)
  local host_dbx_found=io.open(file_name, "r") 
  if host_dbx_found==nil then
     host_dbx_found=file_name .. " ... Error - File Not Found"
   else
     host_dbx_found=file_name .. " ... File Found"
 end
  return host_dbx_found
end
 print(find_host_dbx("C:\\Users\\%username%\\AppData\\Local\\Dbox\\host.dbx"))

it seem I can’t do it like that.

can someone help me please

when I replace %username% by the computer user’s name it works

2

The environment variable substitution isn’t built into the file library. You should be able to use os.getenv() to search for the value, say by adapting the manual’s example here (from "%$(%w+)" to something like %%(%w+)%%", probably).

3

I think it should be something like this

local filePath = system.pathForFile( "your_file_here", system.DocumentsDirectory ) -- it might be in another location than system.DocumentsDirectory
local file = io.open( filePath, "r" )
if file then
  --file found
else
--file not found
end
io.close( file )

this link might help a bit

And if your files are located outside the reach of Solar2D code capabilities then you should use a plugin for that

4

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