[erlang-questions] escript argument encoding

Vlad Dumitrescu <>
Fri Mar 21 21:31:19 CET 2014


Sent a pull request for the doc addition.
/Vlad



On Fri, Mar 21, 2014 at 5:29 PM, Siri Hansen <> wrote:

> It is mentioned here:
> http://www.erlang.org/doc/apps/stdlib/unicode_usage.html#id62041,
> but there might be other places where it should be added. A
> user contribution will of course make such an improvement happen faster!
> /siri
>
> fredagen den 21:e mars 2014 skrev Vlad Dumitrescu <>:
>
> It's not obvious to me that arguments on the command line of a script are
>> handled as file names. Shouldn't there be a notice on the relevant doc page?
>>
>> Regards,
>> Vlad
>>  On 20 Mar 2014 19:42, "José Valim" <>
>> wrote:
>>
>>> Take a look at the +fnu flags:
>>>
>>> http://erlang.org/doc/man/erl.html
>>>
>>>
>>>
>>> *José Valim*
>>> www.plataformatec.com.br
>>> Skype: jv.ptec
>>> Founder and Lead Developer
>>>
>>>
>>> On Thu, Mar 20, 2014 at 7:38 PM, Reid Draper <>wrote:
>>>
>>>> I’m running into an issue where OSX and Linux seem to treat the
>>>> command-line arguments to an escript differently. Using the following
>>>> escript:
>>>>
>>>> #!/usr/bin/env escript
>>>> %% -*- erlang -*-
>>>> %%! +pc unicode
>>>>
>>>> main([Args]) ->
>>>>     io:setopts([{encoding, utf8}]),
>>>>     io:format("~w~n", [Args]),
>>>>     io:format("~ts~n", [Args]).
>>>>
>>>> Both my OSX and Linux (Ubuntu 13.10) boxes have their LANG set
>>>> to en_US.UTF-8. I’m running the escript like so:
>>>>
>>>> ./sample.escript سلام
>>>>
>>>> On OSX, the escript seems to treat `Args` as a list of unicode
>>>> code-points:
>>>>
>>>> ./sample.escript سلام
>>>> [1587,1604,1575,1605]
>>>> سلام
>>>>
>>>> On Linux, it seems to treat the input as a list of UTF-8 bytes, where
>>>> each byte is turned into an integer. The Erlang unicode guide calls this a
>>>> 'Lists of UTF-8 Bytes' [1].
>>>>
>>>> ./sample.escript سلام
>>>> [216,179,217,132,216,167,217,133]
>>>> سلام
>>>>
>>>> How does I get both OSX and Linux to treat the input of the escript as
>>>> a list of code-points?
>>>>
>>>> Thanks,
>>>> Reid
>>>>
>>>> [1] http://www.erlang.org/doc/apps/stdlib/unicode_usage.html
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>> erlang-questions mailing list
>>>> 
>>>> http://erlang.org/mailman/listinfo/erlang-questions
>>>>
>>>>
>>>
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>>> 
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