--:Minify:--
local args = {...}
local uid

if args[1] then
    uid = syscall.getuid(args[1])
    if not uid then
        print("id: user '" .. args[1] .. "' does not exist")
        syscall.exit(1); return
    end
else
    uid = syscall.getuid()
end

local pwent = syscall.getpasswd(uid)
local name = (pwent and pwent.username) or tostring(uid)
local gid  = (pwent and pwent.gid) or uid

print(string.format("uid=%d(%s) gid=%d(%s)", uid, name, gid, name))