bin/reset-usb

   1 #!/usr/bin/env bash
   2
   3 version="0.1"
   4
   5 function usage()
   6 {
   7     echo "Usage :  $0 [options] [<idVendor>:]<idProduct>
   8
   9     Reset usb device identified by idVendor:idProduct.
  10
  11     Options:
  12     -h,--help       Display this message
  13     -v,--version    Display script version"
  14 }
  15
  16 function check_ids()
  17 {
  18     local syspath=$1
  19     [[ -n $idVendor && "$idVendor" != $(cat $syspath/idVendor 2>/dev/null) ]] && return 1
  20     [[ -n $idProduct && "$idProduct" != $(cat $syspath/idProduct 2>/dev/null) ]] && return 1
  21     return 0
  22 }
  23
  24 function main()
  25 {
  26     for syspath in /sys/bus/usb/devices/*; do
  27         if ! check_ids $syspath; then
  28             continue
  29         fi
  30
  31         echo "Resetting '$syspath'"
  32         echo 0 | sudo tee $syspath/authorized >/dev/null
  33         echo 1 | sudo tee $syspath/authorized >/dev/null
  34     done
  35 }
  36
  37 # Parse arguments
  38 declare -a args
  39 while [[ $# -gt 0 ]]; do
  40     opt="$1"
  41
  42     case $opt in
  43         -h|--help)     usage; exit 0 ;;
  44         -v|--version)  echo "$0 -- Version $version"; exit 0 ;;
  45         -* )
  46             echo -e "\n  Option does not exist : $opt\n"
  47             usage; exit 1 ;;
  48
  49         *) args+=("$opt"); shift ;;
  50     esac
  51 done
  52
  53 if [[ ${#args[@]} != 1 ]]; then
  54     usage
  55     exit 1
  56 fi
  57
  58 if [[ ${args[0]} =~ ([^:]+):([^:]+) ]]; then
  59     idVendor=${BASH_REMATCH[1]}
  60     idProduct=${BASH_REMATCH[2]}
  61 else
  62     idProduct=${args[0]}
  63 fi
  64
  65 sudo -v
  66 main