/* usbreset -- send a USB port reset to a USB device */

#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");
      return 1;
   }
   filename = argv[1];

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

   printf("Resetting USB device %s\n", filename);
   rc = ioctl(fd, USBDEVFS_RESET, 0);
   if (rc < 0) {
      perror("Error in ioctl");
      return 1;
   }
   printf("Reset successful\n");

   close(fd);
   return 0;
}