Subject: Re: bug#60896: dired-view-file vs. .7z

From: Ruijie Yu <[email-masked]>
Date: Wed, 25 Jan 2023 21:13:15 +0800

Eli Zaretskii <[email-masked]> writes:

>> From: Dan Jacobson <[email-masked]>
>> Cc: [email-masked],[email-masked]
>> Date: Wed, 25 Jan 2023 10:51:43 +0800
>>
>> Well, if the file is not in 7z format,
>> then I hope dired-view-file would make an error message,
>> like it does if a file is not in .gz format:
>> ---
>> Error while executing "gzip -c -q -d < /tmp/x.gz"
>>
>>
>> gzip: stdin: not in gzip format
>
> That gzip error message comes from the gzip program, not from Emacs.
> What does 7z say in a similar case?  That's what dired-view-file
> should show.

See the attachments for example outputs.  #1 is a malformed 7z archive
(in my case just an empty file created by `touch`), and #2 contains an
actual 7z archive created by `7z a 2.7z memsize.c`.

Best,

RY