local shell=require("shell")
local fs=require("filesystem")
local _,op=shell.parse(...)

local path,why=shell.getWorkingDirectory(),""
if op.P then
path,why=fs.realPath(path)
end
if not path then
io.stderr:write(string.format("error retrieving current directory: %s",why))
os.exit(1)
end

io.write(path,"\n")