tools/usbreset.c

   1 #include <stdio.h>
   2 #include <errno.h>
   3 #include <string.h>
   4 #include <fcntl.h>
   5 #include <sys/ioctl.h>
   6 #include <linux/usbdevice_fs.h>
   7 #include <unistd.h>
   8
   9 //Resets an USB device (akin to disconnecting and re-connecting it)
  10 //See http://www.roman10.net/how-to-reset-usb-device-in-linux/
  11 //Compile with gcc -Wall -o usbreset usbreset.c
  12
  13 int main(int argc, char **argv){
  14         int fd = open(argv[1], O_WRONLY);
  15         if(fd == -1){
  16                 fprintf(stderr, "Cannot open the given USB device: %s\n", strerror(errno));
  17                 return 1;
  18         }
  19         if(ioctl(fd, USBDEVFS_RESET, 0)){
  20                 fprintf(stderr, "Error while invoking the ioctl on the given device: %s\n", strerror(errno));
  21                 close(fd);
  22                 return 2;
  23         }else{
  24                 close(fd);
  25                 return 0;
  26         }
  27 }