On Tue, Jun 13, 2017 at 6:22 PM, Tal Shorer <tal.shorer@xxxxxxxxx> wrote: > On Tue, Jun 13, 2017 at 7:02 PM, Tal Shorer <tal.shorer@xxxxxxxxx> wrote: >> On Tue, Jun 13, 2017 at 3:21 PM, Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: >>> Hi! >>> >>> I'm trying to use gadgetfs to fuzz USB device drivers by simply >>> connecting random devices for now. >>> >>> What I want to achieve right now is the following: >>> >>> 1. mount gadgetfs >>> 2. emulate connection of a new USB device >>> 3. wait for the device to finish initializing >>> 4. unmount gadgetfs >>> 5. goto 1 >>> >>> The question is how do I wait for the device to finish initializing >>> (the corresponding USB driver to finish probing?) before unmounting >>> gadgetfs? As I understand, when I write device description to >>> "/dev/gadget/dummy_udc" the initialization happens asynchronously >>> after writing is done. >>> >> >> You can use inotify on the state file inside a udc's sysfs directory. >> It's awesome like that. >> Here's a sample code that doesn't do any cleanups because I'm lazy: >> https://gist.github.com/talshorer/61be1bc3472cc2a7b4866b9bd5a239ca > And I forgot usage >: > ./wait_udc_configured /sys/devices/platform/dummy_udc.0/udc/dummy_udc.0/state Hi Tal, I will try this, thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
