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Re: [Nmh-workers] corruption when attaching all-null files

From: Ken Hornstein
Subject: Re: [Nmh-workers] corruption when attaching all-null files
Date: Wed, 07 May 2014 12:51:43 -0400

>it gets assigned a type of application/octet-stream, but no encoding
>gets done. after using Attach:, and then running mime on the draft, it
>looks like this: (copy/pasted from my edit buffer, where the nulls show
>up as '^@')

The automatic selection code for application types is:

       /* For application type, use base64, except when postscript */
       if (contains8bit || linelen || linespace || checksw)
           ct->c_encoding = (ct->c_subtype == APPLICATION_POSTSCRIPT)
               ? CE_QUOTED : CE_BASE64;
           ct->c_encoding = CE_7BIT.

A file of all \0 wouldn't match any of these cases (contains8bit only
gets set if the function fails isascii(), which is between 0 and 127.).
I think we need a new test (isvalid7bit?  Have to think about it).


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