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diff --git a/lib/libusb/libusb.h b/lib/libusb/libusb.h
--- a/lib/libusb/libusb.h
+++ b/lib/libusb/libusb.h
@@ -598,6 +598,8 @@
int libusb_hotplug_register_callback(libusb_context *ctx, libusb_hotplug_event events, libusb_hotplug_flag flags, int vendor_id, int product_id, int dev_class, libusb_hotplug_callback_fn cb_fn, void *user_data, libusb_hotplug_callback_handle *handle);
void libusb_hotplug_deregister_callback(libusb_context *ctx, libusb_hotplug_callback_handle handle);
+void *libusb_hotplug_get_user_data(struct libusb_context *ctx,
+ libusb_hotplug_callback_handle callback_handle);
/* Streams support */
diff --git a/lib/libusb/libusb.3 b/lib/libusb/libusb.3
--- a/lib/libusb/libusb.3
+++ b/lib/libusb/libusb.3
@@ -762,6 +762,10 @@
.Ft void
.Fn libusb_hotplug_deregister_callback "libusb_context *ctx" "libusb_hotplug_callback_handle handle"
This function unregisters a hotplug filter.
+.Pp void *
+.Fn libusb_hotplug_get_user_data "struct libusb_context *ctx" "libusb_hotplug_callback_handle callback_handle"
+This function get the user data from opaque
+.Fa callback_handle
.Sh LIBUSB VERSION 0.1 COMPATIBILITY
The library is also compliant with LibUSB version 0.1.12.
.Pp
diff --git a/lib/libusb/libusb10_hotplug.c b/lib/libusb/libusb10_hotplug.c
--- a/lib/libusb/libusb10_hotplug.c
+++ b/lib/libusb/libusb10_hotplug.c
@@ -414,3 +414,21 @@
free(handle);
}
+
+void *
+libusb_hotplug_get_user_data(struct libusb_context *ctx,
+ libusb_hotplug_callback_handle callback_handle)
+{
+ libusb_hotplug_callback_handle handle;
+
+ ctx = GET_CONTEXT(ctx);
+
+ HOTPLUG_LOCK(ctx);
+ TAILQ_FOREACH(handle, &ctx->hotplug_cbh, entry) {
+ if (handle == callback_handle)
+ return (handle->user_data);
+ }
+ HOTPLUG_UNLOCK(ctx);
+
+ return (NULL);
+}

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