Re: [PATCH] _rl_untranslate_macro_value with meta control chars

[G. Branden Robinson]

Hi Grisha,

At 2023-08-03T15:52:21-0400, Grisha Levit wrote:
> Note that my output for the "PI" cases was not piped through `cat -v',
> nor otherwise translated for email  -- that was the literal text being
> written by `bind -s'.  I'm assuming your output (without `cat -v') had
> actual `π' characters.

Yes, it did.

> The output actually depends on the signedness of char on your
> platform:
> 
> $ uname -sp
> Linux aarch64
> $ getconf CHAR_MAX
> 255
> $ (bind '"PI": "π"'; bind -s)
> "PI": "\M-O\M-"
> 
> $ uname -sp
> Linux x86_64
> $ getconf CHAR_MAX
> 127
> $ (bind '"PI": "π"'; bind -s)
> "PI": "π"

Ahh, that comparison sheds much light.  Thanks!

I'm surprised that differences in char signedness weren't flushed out
when Bash was ported to PowerPC, though.

> I suspect the behavior difference is not intentional.  The code seems
> to have been written with the goal of producing output without the
> high bit set so is missing some `(unsigned char)' casts.

I remember it getting messy around there.

https://lists.gnu.org/archive/html/bug-bash/2016-02/msg00185.html

Regards,
Branden

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