From akoana, 1 Year ago, written in Plain Text.
This paste is a reply to usbreset.c from akoana - go back
Viewing differences between usbreset.c and Re: usbreset.c
/* usbreset -- send a USB port reset to a USB device */
Compile the program:

$ cc usbreset.c -o usbreset

Get the Bus and Device ID of the USB device you want to reset:

$ lsusb
Bus 002 Device 003: ID 0fe9:9010 DVICO

Make our compiled program executable:

$ chmod +x usbreset

Execute the program with sudo privilege; make necessary substitution for
ids as found by running the

$ sudo ./usbreset /dev/bus/usb/002/003

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>

#include <linux/usbdevice_fs.h>

int main(int argc, char **argv)
const char *filename;
int fd;
int rc;

if (argc != 2) {
fprintf(stderr, "Usage: usbreset device-filename,n e.g:usbreset /dev/bus/usb/002/003n");
return 1;
filename = argv[1];

fd = open(filename, O_WRONLY);
if (fd < 0) {
perror("Error opening output file");
return 1;

printf("Resetting USB device %sn", filename);
rc = ioctl(fd, USBDEVFS_RESET, 0);
if (rc < 0) {
perror("Error in ioctl");
return 1;
printf("Reset successfuln");

return 0;