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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
parent afaae08442
commit 3c95c985fa
9 changed files with 13 additions and 0 deletions
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arch/mips/include/asm/ioctls.h
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@ -85,6 +85,7 @@
#define TIOCSPTLCK _IOW('T', 0x31, int) /* Lock/unlock Pty */
#define TIOCGDEV _IOR('T', 0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T', 0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP 0x5437
/* I hope the range from 0x5480 on is free ... */
#define TIOCSCTTY 0x5480 /* become controlling tty */