Messages in this thread | | | Date | Sun, 9 Jun 2019 19:41:39 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH 0/7] TTY Keyboard Status Request |
| |
Hi!
> This patch series introduces TTY keyboard status request, a feature of > the n_tty line discipline that reserves a character in struct termios > (^T by default) and reacts to it by printing a short informational line > to the terminal and sending a Unix signal to the tty's foreground > process group. The processes may, in response to the signal, output a > textual description of what they're doing. > > The feature has been present in a similar form at least in > Free/Open/NetBSD; it would be nice to have something like this in Linux > as well. There is an LKML thread[1] where users have previously > expressed the rationale for this. > > The current implementation does not break existing kernel API in any > way, since, fortunately, all the architectures supported by the kernel > happen to have at least 1 free byte in the termios control character > array.
I like the idea... I was often wondering "how long will this dd take". (And in case of dd, SIGUSR1 does the job).
I assume this will off by default, so that applications using ^T today will not get surprise signals? Pavel
| |