fbc92a3455
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
20 lines
584 B
Plaintext
20 lines
584 B
Plaintext
What: /sys/class/tty/console/active
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Date: Nov 2010
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Contact: Kay Sievers <kay.sievers@vrfy.org>
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Description:
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Shows the list of currently configured
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console devices, like 'tty1 ttyS0'.
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The last entry in the file is the active
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device connected to /dev/console.
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The file supports poll() to detect virtual
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console switches.
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What: /sys/class/tty/tty0/active
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Date: Nov 2010
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Contact: Kay Sievers <kay.sievers@vrfy.org>
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Description:
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Shows the currently active virtual console
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device, like 'tty1'.
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The file supports poll() to detect virtual
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console switches.
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