%entities; ]> systemd udev_monitor_filter_update 3 udev_monitor_filter_update udev_monitor_filter_remove udev_monitor_filter_add_match_subsystem_devtype udev_monitor_filter_add_match_tag Modify filters #include <libudev.h> int udev_monitor_filter_update struct udev_monitor *udev_monitor int udev_monitor_filter_remove struct udev_monitor *udev_monitor int udev_monitor_filter_add_match_subsystem_devtype struct udev_monitor *udev_monitor const char *subsystem const char *devtype int udev_monitor_filter_add_match_tag struct udev_monitor *udev_monitor const char *tag On success, udev_monitor_filter_update(), udev_monitor_filter_remove(), udev_monitor_filter_add_match_subsystem_devtype() and udev_monitor_filter_add_match_tag() return an integer greater than, or equal to, 0. On failure, a negative error code is returned. udev_new3, udev_device_new_from_syspath3, udev_enumerate_new3, udev_monitor_new_from_netlink3, udev_monitor_receive_device3, udev_list_entry3, systemd1,