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authorKay Sievers <kay.sievers@vrfy.org>2010-12-01 12:51:05 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2010-12-16 19:15:34 -0500
commitfbc92a3455577ab17615cbcb91826399061bd789 (patch)
tree0f47703d9d3b40969e007a6d27a1b603cdff43da /Documentation
parent35c64e5d13c3d7d8c4ad061ad5e20498b9160c24 (diff)
tty: add 'active' sysfs attribute to tty0 and console device
tty: add 'active' sysfs attribute to tty0 and console device Userspace can query the actual virtual console, and the configured console devices behind /dev/tt0 and /dev/console. The last entry in the list of devices is the active device, analog to the console= kernel command line option. The attribute supports poll(), which is raised when the virtual console is changed or /dev/console is reconfigured. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> index 0000000..b138b66
Diffstat (limited to 'Documentation')
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1What: /sys/class/tty/console/active
2Date: Nov 2010
3Contact: Kay Sievers <kay.sievers@vrfy.org>
4Description:
5 Shows the list of currently configured
6 console devices, like 'tty1 ttyS0'.
7 The last entry in the file is the active
8 device connected to /dev/console.
9 The file supports poll() to detect virtual
10 console switches.
11
12What: /sys/class/tty/tty0/active
13Date: Nov 2010
14Contact: Kay Sievers <kay.sievers@vrfy.org>
15Description:
16 Shows the currently active virtual console
17 device, like 'tty1'.
18 The file supports poll() to detect virtual
19 console switches.