mh
/
qmk_firmware
mirror of https://github.com/qmk/qmk_firmware/


								/* Found at https://www.linuxquestions.org/questions/linux-hardware-18/how-to-unclaim-usb-device-558138/#post3406986 */

								#include <stdio.h>

								#include <sys/ioctl.h>

								#include <sys/types.h>

								#include <sys/stat.h>

								#include <fcntl.h>

								#include <linux/ioctl.h>

								#include <linux/usbdevice_fs.h>


								int main(int argc, char**argv)

								{

								        struct usbdevfs_ioctl command;

								        int ret;

								        int fd;

								        int i;

								        if (argc>1) {

								                fd = open(argv[1],O_RDWR);

								                if (fd<1){

								                        perror("unable to open file");

								                        return 1;

								                }

								                for (i=0;i<255;i++){ // hack: should fetch how many interface there is.

								                        command.ifno = i;

								                        command.ioctl_code = USBDEVFS_DISCONNECT;

								                        command.data = NULL;

								                        ret = ioctl(fd, USBDEVFS_IOCTL, &command);

								                        if(ret!=-1)

								                                printf("un claimed interface %d %d\n",i,ret);

								                }

								        } else {

								                printf ("usage: %s /dev/bus/usb/BUS/DEVICE\n",argv[0]);

								                printf("Release all interfaces of this usb device for usage in virtualisation\n");

								        }

								}