Re: [mpg123-devel] [PATCH] term_posix: Ignore escape sequences

[Thomas O. <tho...@or...>]

Am Fri, 17 Oct 2025 20:10:13 -0500 (CDT)
schrieb Peter Tirsek <pe...@ti...>: 

> I did a brief survey of special keys in the terminal emulators I have 
> easy access to, and I think all these escape sequences can be ignored 
> by discarding the leading escape character(s), then any occurrences of 
> the characters `[0123456789;O`, followed by a character not in that 
> list.

Funny how long mpg123 could live without caring about the issue of
escape sequences messing with the terminal control keys.

We probably should just go with

	https://en.wikipedia.org/wiki/ANSI_escape_code

and do some generic escape sequence slurping. It's not that many
variants if one doesn't actually want to interpret them. I think it
should be OK to write simple code to deal with that without relying on
a proper terminal/curses library.

> I've applied the patch below to my copy of mpg123 and it works for me. 
> I thought I'd share it upstream in case anyone else finds it useful.

Thanks, something along that we should add. Regarding the approach: As
it can be reasonably assumed that a control sequence comes in one go,
I'd rather loop-read it right after the intro character without a
global flag for being inside a sequence or not.


Alrighty then,

Thomas