/* 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;
}