From: Günther Noack Date: Tue, 8 Aug 2023 20:11:12 +0000 (+0200) Subject: TIOCSTI: Document CAP_SYS_ADMIN behaviour in Kconfig X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=3f29d9ee323ae5cda59d144d1f8b0b10ea065be0;p=users%2Fjedix%2Flinux-maple.git TIOCSTI: Document CAP_SYS_ADMIN behaviour in Kconfig 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 --- diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index 341abaed4ce2c..069de553127c4 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.