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tty: add TIOCVHANGUP to allow clean tty shutdown of all ttys

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This is useful for system management software so that it can kick
off things like gettys and everything that's started from a tty,
before we reuse it from/for something else or shut it down.

Without this ioctl it would have to temporarily become the owner of
the tty, then call vhangup() and then give it up again.

Cc: Lennart Poettering <lennart@poettering.net>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers 2011-02-17 18:39:28 +01:00 • committed by Greg Kroah-Hartman
commit 3c95c985fa
9 changed files with 13 additions and 0 deletions
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1
include/asm-generic/ioctls.h
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@ -73,6 +73,7 @@
#define TCSETXF 0x5434
#define TCSETXW 0x5435
#define TIOCSIG _IOW('T', 0x36, int) /* pty: generate signal */
#define TIOCVHANGUP 0x5437
#define FIONCLEX 0x5450
#define FIOCLEX 0x5451