libudev: add userdata pointer

3 files changed, 28 insertions, 2 deletions

diff --git a/udev/lib/exported_symbols b/udev/lib/exported_symbols
index 8efd2914e2..6b034d4594 100644
--- a/udev/lib/exported_symbols
+++ b/udev/lib/exported_symbols
@@ -5,6 +5,8 @@ udev_log
 udev_set_log_fn
 udev_get_log_priority
 udev_set_log_priority
+udev_get_userdata
+udev_set_userdata
 udev_get_sys_path
 udev_get_dev_path
 udev_device_new_from_syspath
diff --git a/udev/lib/libudev.c b/udev/lib/libudev.c
index 2d34925912..3ff6cabbb0 100644
--- a/udev/lib/libudev.c
+++ b/udev/lib/libudev.c
@@ -37,6 +37,7 @@ struct udev {
 	void (*log_fn)(struct udev *udev,
 		       int priority, const char *file, int line, const char *fn,
 		       const char *format, va_list args);
+	void *userdata;
 	char *sys_path;
 	char *dev_path;
 	char *rules_path;
@@ -89,6 +90,20 @@ static void selinux_init(struct udev *udev)
 #endif
 }
 
+void *udev_get_userdata(struct udev *udev)
+{
+	if (udev == NULL)
+		return NULL;
+	return udev->userdata;
+}
+
+void udev_set_userdata(struct udev *udev, void *userdata)
+{
+	if (udev == NULL)
+		return;
+	udev->userdata = userdata;
+}
+
 static void selinux_exit(struct udev *udev)
 {
 #ifdef USE_SELINUX
diff --git a/udev/lib/libudev.h b/udev/lib/libudev.h
index 4d5fd93efc..e71f6b217a 100644
--- a/udev/lib/libudev.h
+++ b/udev/lib/libudev.h
@@ -29,6 +29,10 @@
 #endif
 
 struct udev;
+struct udev_device;
+struct udev_monitor;
+
+/* library context */
 extern struct udev *udev_new(void);
 extern struct udev *udev_ref(struct udev *udev);
 extern void udev_unref(struct udev *udev);
@@ -40,11 +44,15 @@ extern int udev_get_log_priority(struct udev *udev);
 extern void udev_set_log_priority(struct udev *udev, int priority);
 extern const char *udev_get_sys_path(struct udev *udev);
 extern const char *udev_get_dev_path(struct udev *udev);
+extern void *udev_get_userdata(struct udev *udev);
+extern void udev_set_userdata(struct udev *udev, void *userdata);
+
+/* selinux glue */
 extern void udev_selinux_resetfscreatecon(struct udev *udev);
 extern void udev_selinux_setfscreatecon(struct udev *udev, const char *file, unsigned int mode);
 extern void udev_selinux_lsetfilecon(struct udev *udev, const char *file, unsigned int mode);
 
-struct udev_device;
+/* sys devices */
 extern struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath);
 extern struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum);
 extern struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
@@ -70,11 +78,12 @@ extern const char *udev_device_get_action(struct udev_device *udev_device);
 extern unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device);
 extern const char *udev_device_get_attr_value(struct udev_device *udev_device, const char *attr);
 
+/* sys enumeration */
 extern int udev_enumerate_devices(struct udev *udev, const char *subsystem,
 				  int (*cb)(struct udev_device *udev_device, void *data),
 				  void *data);
 
-struct udev_monitor;
+/* udev and kernel device events */
 extern struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path);
 extern struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev);
 extern int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor);