Re: Unable to Change MIME Types Reported by File

[Brian Monroe]

So what I had been doing was adding:
```
echo "# Citrix File Types" >> /usr/share/misc/magic
echo "20 search/50 WFClient Citrix Client File" >> /usr/share/misc/magic
echo "!:mime application/x-ica" >> /usr/share/misc/magic
cd /usr/share/misc
file -C -m /usr/share/misc/magic
cd ~/
```
so I recompile the existing magic.mgc

I changed this to:

```
echo "# Citrix File Types" >> /usr/share/misc/magic
echo "20 search/50 WFClient Citrix Client File" >> /etc/magic
echo "!:mime application/x-ica" >> /etc/magic
cd /etc/
file -C -m /etc/magic
cd ~/
```

So there would be both a magic and magic.mgc files in etc, neither of which
existed by default from a clean F28 minimal install.

`file --mime-type -b -k /path/to/example.ica` returns:
application/x-wine-extension-ini\012- application/xica\012-
application/octet-stream


Using my original method previously with a clean install of CentOS 7 only
returns application/x-ica. This mirrored what I remember doing with F26.




On Wed, Oct 3, 2018 at 10:37 PM Samuel Sieb <samuel(a)sieb.net&gt; wrote:

>  On 10/3/18 8:55 AM, Brian Monroe wrote:
>  > I'm having trouble registering a new mime type. I had this working in
>  > Fedora 26 (and 27 iirc) but it seems to not be working in F28. I'm
>  > adding some lines to /usr/share/misc/magic and then recompiling and
>  > replacing /usr/share/mime/magic.mgc . In the past this has worked to
>  > patch the mime type this way and still works in RHEL/CentOS 7.
>  >
>  > Using
>  > file --mime-type -k  exampleFile.ica
>  > I can see my entry as the second item, but even after adding `!:strength
>  > +250` it doesn't override the default, which is
>  > application\x-wine-extension-ini
>  > I even went so far as to remove all lines containing
>  > x-wine-extension-ini from the magic file but the assignment persists,
>  > which makes me think that either file no longer looks to
>  > /usr/share/mime/magic.mgc for the only place for mime types, there's a
>  > bug, or something else I haven't considered.
>
>  If it finds the compiled /usr/share/mime/magic.mgc file, it will ignore
>  /usr/share/mime/magic.  Modifications are supposed to go in the
>  /etc/magic file which could be compiled to /etc/magic.mgc.  Those files
>  are checked first.
>
>  I copied the lines from /usr/share/mime/magic to /etc/magic and made
>  changes.  Those changes overrode the original matches.
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