compiled-tools/usbreset.c

   1 /* usbreset -- send a USB port reset to a USB device */
   2
   3 #include <stdio.h>
   4 #include <unistd.h>
   5 #include <fcntl.h>
   6 #include <errno.h>
   7 #include <sys/ioctl.h>
   8
   9 #include <linux/usbdevice_fs.h>
  10
  11
  12 int main(int argc, char **argv)
  13 {
  14         const char *filename;
  15         int fd;
  16         int rc;
  17
  18         if (argc != 2) {
  19                 fprintf(stderr, "Usage: usbreset device-filename\n");
  20                 return 1;
  21         }
  22         filename = argv[1];
  23
  24         fd = open(filename, O_WRONLY);
  25         if (fd < 0) {
  26                 perror("Error opening output file");
  27                 return 1;
  28         }
  29
  30         printf("Resetting USB device %s\n", filename);
  31         rc = ioctl(fd, USBDEVFS_RESET, 0);
  32         if (rc < 0) {
  33                 perror("Error in ioctl");
  34                 return 1;
  35         }
  36         printf("Reset successful\n");
  37
  38         close(fd);
  39         return 0;
  40 }