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added unique identifier to device info #23

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added unique identifier to device info #23

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7 changes: 7 additions & 0 deletions device.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ type InputDevice struct {

Name string // device name
Phys string // physical topology of device
Ident string // unique identifier
File *os.File // an open file handle to the input device

Bustype uint16 // bus type identifier
Expand Down Expand Up @@ -119,6 +120,7 @@ func (dev *InputDevice) String() string {
"InputDevice %s (fd %d)\n"+
" name %s\n"+
" phys %s\n"+
" ident %s\n"+
" bus 0x%04x, vendor 0x%04x, product 0x%04x, version 0x%04x\n"+
" events %s",
dev.Fn, dev.File.Fd(), dev.Name, dev.Phys, dev.Bustype,
Expand Down Expand Up @@ -179,6 +181,7 @@ func (dev *InputDevice) set_device_info() error {

name := new([MAX_NAME_SIZE]byte)
phys := new([MAX_NAME_SIZE]byte)
ident := new([MAX_NAME_SIZE]byte)

err := ioctl(dev.File.Fd(), uintptr(EVIOCGID), unsafe.Pointer(&info))
if err != 0 {
Expand All @@ -193,8 +196,12 @@ func (dev *InputDevice) set_device_info() error {
// it's ok if the topology info is not available
ioctl(dev.File.Fd(), uintptr(EVIOCGPHYS), unsafe.Pointer(phys))

// it's ok if the unique identifier is not available
ioctl(dev.File.Fd(), uintptr(EVIOCGUNIQ), unsafe.Pointer(ident))

dev.Name = bytes_to_string(name)
dev.Phys = bytes_to_string(phys)
dev.Ident = bytes_to_string(ident)

dev.Vendor = info.vendor
dev.Bustype = info.bustype
Expand Down