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b31c9d9dc3
There is a need for userspace applications to open HID devices directly.
Use-cases include configuration of gaming mice or direct access to
joystick devices. The latter is currently handled by the uaccess tag in
systemd, other devices include more custom/local configurations or just
sudo.
A better approach is what we already have for evdev devices: give the
application a file descriptor and revoke it when it may no longer access
that device.
This patch is the hidraw equivalent to the EVIOCREVOKE ioctl, see
commit c7dc65737c ("Input: evdev - add EVIOCREVOKE ioctl") for full
details.
An MR for systemd-logind has been filed here:
https://github.com/systemd/systemd/pull/33970
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Link: https://patch.msgid.link/20240827-hidraw-revoke-v5-1-d004a7451aea@kernel.org
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Copyright (c) 2007 Jiri Kosina
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _UAPI_HIDRAW_H
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#define _UAPI_HIDRAW_H
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#include <linux/hid.h>
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#include <linux/types.h>
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struct hidraw_report_descriptor {
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__u32 size;
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__u8 value[HID_MAX_DESCRIPTOR_SIZE];
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};
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struct hidraw_devinfo {
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__u32 bustype;
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__s16 vendor;
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__s16 product;
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};
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/* ioctl interface */
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#define HIDIOCGRDESCSIZE _IOR('H', 0x01, int)
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#define HIDIOCGRDESC _IOR('H', 0x02, struct hidraw_report_descriptor)
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#define HIDIOCGRAWINFO _IOR('H', 0x03, struct hidraw_devinfo)
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#define HIDIOCGRAWNAME(len) _IOC(_IOC_READ, 'H', 0x04, len)
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#define HIDIOCGRAWPHYS(len) _IOC(_IOC_READ, 'H', 0x05, len)
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/* The first byte of SFEATURE and GFEATURE is the report number */
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#define HIDIOCSFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
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#define HIDIOCGFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
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#define HIDIOCGRAWUNIQ(len) _IOC(_IOC_READ, 'H', 0x08, len)
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/* The first byte of SINPUT and GINPUT is the report number */
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#define HIDIOCSINPUT(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x09, len)
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#define HIDIOCGINPUT(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x0A, len)
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/* The first byte of SOUTPUT and GOUTPUT is the report number */
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#define HIDIOCSOUTPUT(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x0B, len)
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#define HIDIOCGOUTPUT(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x0C, len)
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#define HIDIOCREVOKE _IOW('H', 0x0D, int) /* Revoke device access */
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#define HIDRAW_FIRST_MINOR 0
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#define HIDRAW_MAX_DEVICES 64
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/* number of reports to buffer */
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#define HIDRAW_BUFFER_SIZE 64
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/* kernel-only API declarations */
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#endif /* _UAPI_HIDRAW_H */
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