C++ (Cpp) udev_device_info Examples

Example #1

File: linux_udev.c Project: TaoheGit/hmi_sdl_android

static void udev_hotplug_event(struct udev_device* udev_dev)
{
	const char* udev_action;
	const char* sys_name = NULL;
	uint8_t busnum = 0, devaddr = 0;
	int detached;
	int r;

	do {
		udev_action = udev_device_get_action(udev_dev);
		if (!udev_action) {
			break;
		}

		detached = !strncmp(udev_action, "remove", 6);

		r = udev_device_info(NULL, detached, udev_dev, &busnum, &devaddr, &sys_name);
		if (LIBUSB_SUCCESS != r) {
			break;
		}

		usbi_dbg("udev hotplug event. action: %s.", udev_action);

		if (strncmp(udev_action, "add", 3) == 0) {
			linux_hotplug_enumerate(busnum, devaddr, sys_name);
		} else if (detached) {
			linux_hotplug_disconnected(busnum, devaddr, sys_name);
		} else {
			usbi_err(NULL, "ignoring udev action %s", udev_action);
		}
	} while (0);

	udev_device_unref(udev_dev);
}

Example #2

File: linux_udev.c Project: LudovicRousseau/libusb-darwin

int linux_udev_scan_devices(struct libusb_context *ctx)
{
	struct udev_enumerate *enumerator;
	struct udev_list_entry *devices, *entry;
	struct udev_device *udev_dev;
	const char *sys_name;
	int r;

	if (NULL == udev_ctx) {
		udev_ctx = udev_new();
		if (!udev_ctx) {
			return LIBUSB_ERROR_OTHER;
		}
	}

	enumerator = udev_enumerate_new(udev_ctx);
	if (NULL == enumerator) {
		usbi_err(ctx, "error creating udev enumerator");
		return LIBUSB_ERROR_OTHER;
	}

	udev_enumerate_add_match_subsystem(enumerator, "usb");
	udev_enumerate_scan_devices(enumerator);
	devices = udev_enumerate_get_list_entry(enumerator);

	udev_list_entry_foreach(entry, devices) {
		const char *path = udev_list_entry_get_name(entry);
		uint8_t busnum = 0, devaddr = 0;

		udev_dev = udev_device_new_from_syspath(udev_ctx, path);

		r = udev_device_info(ctx, 0, udev_dev, &busnum, &devaddr, &sys_name);
		if (r) {
			udev_device_unref(udev_dev);
			continue;
		}

		linux_enumerate_device(ctx, busnum, devaddr, sys_name);
		udev_device_unref(udev_dev);
	}

	udev_enumerate_unref(enumerator);

        return LIBUSB_SUCCESS;
}