Redirect output from erlang shell into a file

Question

Is there a way to redirect data printed by `io:format()` from erlang shell into a file ? I know that I can open a file (IoDevice) and write data directly into it, but it requires code change and I don't want to do now.

Accepted Answer

Just run it with `erl -noinput -s module function -s init stop > file`.

Here's an example.

Erlang code:

```
-module(test).    
-compile(export_all).

function() ->
   io:fwrite("Hello world!~n").
```

In shell:

```
$ erlc test.erl 
$ erl -noinput -s test function -s init stop > test.txt
$ cat test.txt
Hello world!
```

Redirect output from erlang shell into a file

Solution

Problem