105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
|
|
* Copyright 2014 by VMware, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Except as contained in this notice, the name of the copyright holder(s)
|
|
* and author(s) shall not be used in advertising or otherwise to promote
|
|
* the sale, use or other dealings in this Software without prior written
|
|
* authorization from the copyright holder(s) and author(s).
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_LIBUDEV
|
|
#include <libudev.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define KERNEL_DEVNAME "VirtualPS/2 VMware VMMouse"
|
|
|
|
/**
|
|
* vmmouse_uses_kernel_driver - Check whether there's an active
|
|
* vmmouse driver in the kernel.
|
|
*
|
|
* Returns 0 if there was no kernel driver found.
|
|
* Returns non-zero on error or if there was an active driver found.
|
|
*
|
|
* Scans the input subsystem for devices matching KERNEL_DEVNAME. These
|
|
* devices are assumed to be active vmmouse drivers.
|
|
*/
|
|
int vmmouse_uses_kernel_driver(void)
|
|
{
|
|
struct udev *udev;
|
|
struct udev_enumerate *enumerate;
|
|
struct udev_list_entry *devices, *dev_list_entry;
|
|
struct udev_device *dev;
|
|
|
|
udev = udev_new();
|
|
if (!udev)
|
|
return 1;
|
|
|
|
/*
|
|
* Udev error return codes that are not caught immediately are
|
|
* typically caught in the input argument check in the udev
|
|
* function calls following the failing call!
|
|
*/
|
|
enumerate = udev_enumerate_new(udev);
|
|
if (udev_enumerate_add_match_subsystem(enumerate, "input"))
|
|
goto out_err;
|
|
if (udev_enumerate_scan_devices(enumerate))
|
|
goto out_err;
|
|
|
|
devices = udev_enumerate_get_list_entry(enumerate);
|
|
udev_list_entry_foreach(dev_list_entry, devices) {
|
|
const char *path, *name;
|
|
|
|
path = udev_list_entry_get_name(dev_list_entry);
|
|
dev = udev_device_new_from_syspath(udev, path);
|
|
if (!dev)
|
|
goto out_err;
|
|
name = udev_device_get_sysattr_value(dev, "name");
|
|
if (name && !strcasecmp(name, KERNEL_DEVNAME))
|
|
goto out_found;
|
|
|
|
udev_device_unref(dev);
|
|
}
|
|
|
|
udev_enumerate_unref(enumerate);
|
|
udev_unref(udev);
|
|
|
|
return 0;
|
|
|
|
out_found:
|
|
udev_device_unref(dev);
|
|
out_err:
|
|
udev_enumerate_unref(enumerate);
|
|
udev_unref(udev);
|
|
|
|
return 1;
|
|
}
|
|
#else
|
|
int vmmouse_uses_kernel_driver(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|