Re: [PATCH] n_tty: Fix 4096-byte canonical reads

[One Thousand Gnomes]

On Fri, 22 Nov 2013 07:16:25 -0500
Peter Hurley <peter@xxxxxxxxxxxxxxxxxx> wrote:

> Although the maximum allowable canonical line is specified to
> be 255 bytes (MAX_CANON), the practical limit has actually been
> the size of the line discipline read buffer (N_TTY_BUF_SIZE == 4096).

Looks good. MAX_CANON in SVID and POSIX is a guarantee that you'll be
able to edit that may characters into a line. What happens beyond
MAX_CANON is implementation defined and msotly it seems interpreted as
"you may get more" - ie MAX_CANON is a minimum line guarantee.

Alan
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