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Re: Control chars during an escape sequence
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From: |
Tim Allen |
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Subject: |
Re: Control chars during an escape sequence |
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Date: |
Wed, 7 Aug 2019 10:23:07 +1000 |
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User-agent: |
Mutt/1.10.1 (2018-07-13) |
On Tue, Aug 06, 2019 at 06:02:35PM -0500, Bryan Christ wrote:
> The reason I ask is because the the string which accompanies the OSC
> "set window title" sequence is often terminated by 0x7 (bell) so that
> seems to be an issue. In the "vttest" scenario, only "backspace" and
> "vertical tab" are injected into the escape string. Is that because
> they're the only two that are permissible?
The vt100.net state diagram[1] says that all control characters inside
an OSC sequence are ignored, except for ESC (which starts a new
sequence), CAN, and SUB (which are both "executed", and I think cancel
the sequence). On the other hand, it doesn't say anything about BEL
executing the sequence, only ST (0x9C).
[1]: https://vt100.net/emu/dec_ansi_parser