Re: charset ANSI_x3.4-1968, et al

[Simon Josefsson <simon@josefsson.org>]

Karl Chen <quarl@cs.berkeley.edu> writes:

> Dear Gnus developers, I've been starting to receive a lot of
> emails from cron [1] with this header:
>
>  Content-Type: text/plain; charset=ANSI_X3.4-1968
>
> I get the message: Unknown charset: ANSI_X3.4-1968
>
> According to RFC 1345, "ANSI_X3.4-1968", along with other names,
> are aliases for US-ASCII, and actually, "ANSI_X3.4-1968" is the
> official name (though according to
> http://www.iana.org/assignments/character-sets, "US-ASCII" is the
> preferred MIME name).

RFC 1345 is not standards-track, but the IANA registry is used by the
standards-track MIME.

> Could you consider something such as the patch below, which works
> for me:
>
>
> --- mm-util.el	17 Mar 2007 18:08:14 -0700	7.62
> +++ mm-util.el	17 Mar 2007 18:27:45 -0700	
> @@ -641,8 +641,9 @@
>     ((and allow-override
>  	 (let ((cs (cdr (assq charset mm-charset-override-alist))))
>  	   (and cs (mm-coding-system-p cs) cs))))
> -   ;; ascii
> -   ((eq charset 'us-ascii)
> +   ;; ascii (see RFC 1345)
> +   (memq charset '(us-ascii ansi_x3.4-1968 ansi_x3.4-1986 iso-ir-6 iso646-us
> +                            iso_646.irv:1991 us ibm367 cp367 csascii))
>      'ascii)
>     ;; Check to see whether we can handle this charset.  (This depends
>     ;; on there being some coding system matching each `mime-charset'

I think we should install this.  Any objections?

> [1] This is now happening on multiple systems (which are all
>     Debian).  cron appears to be using the default locale name.
>     On Linux, you can get the string ANSI_x3.4-1968 if you run
>     "LC_CTYPE=C locale charmap".

I think this should be reported as a bug.

/Simon