From 3f29d9ee323ae5cda59d144d1f8b0b10ea065be0 Mon Sep 17 00:00:00 2001 From: Günther Noack Date: Tue, 8 Aug 2023 22:11:12 +0200 Subject: TIOCSTI: Document CAP_SYS_ADMIN behaviour in Kconfig MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Clarifies that the LEGACY_TIOCSTI setting is safe to turn off even when running BRLTTY, as it was introduced in commit 690c8b804ad2 ("TIOCSTI: always enable for CAP_SYS_ADMIN"). Signed-off-by: Günther Noack Reviewed-by: Samuel Thibault Link: https://lore.kernel.org/r/20230808201115.23993-1-gnoack3000@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/Kconfig | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/tty/Kconfig') diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index 341abaed4ce2..069de553127c 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -164,6 +164,9 @@ config LEGACY_TIOCSTI userspace depends on this functionality to continue operating normally. + Processes which run with CAP_SYS_ADMIN, such as BRLTTY, can + use TIOCSTI even when this is set to N. + This functionality can be changed at runtime with the dev.tty.legacy_tiocsti sysctl. This configuration option sets the default value of the sysctl. -- cgit