diff options
| -rw-r--r-- | udev/lib/libudev.h | 70 |
1 files changed, 53 insertions, 17 deletions
diff --git a/udev/lib/libudev.h b/udev/lib/libudev.h index 63cb478b8f..241091c37d 100644 --- a/udev/lib/libudev.h +++ b/udev/lib/libudev.h @@ -21,11 +21,16 @@ #error "#define LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE is needed to use this experimental library version" #endif -/* library context */ +/* + * udev - library context + * + * reads the udev config and system environment + * allows custom logging + */ struct udev; -struct udev *udev_new(void); struct udev *udev_ref(struct udev *udev); void udev_unref(struct udev *udev); +struct udev *udev_new(void); void udev_set_log_fn(struct udev *udev, void (*log_fn)(struct udev *udev, int priority, const char *file, int line, const char *fn, @@ -37,7 +42,11 @@ const char *udev_get_dev_path(struct udev *udev); void *udev_get_userdata(struct udev *udev); void udev_set_userdata(struct udev *udev, void *userdata); -/* list iteration */ +/* + * udev_list + * + * access to libudev generated lists + */ struct udev_list_entry; struct udev_list_entry *udev_list_entry_get_next(struct udev_list_entry *list_entry); struct udev_list_entry *udev_list_entry_get_by_name(struct udev_list_entry *list_entry, const char *name); @@ -48,16 +57,23 @@ const char *udev_list_entry_get_value(struct udev_list_entry *list_entry); entry != NULL; \ entry = udev_list_entry_get_next(entry)) -/* sys devices */ +/* + * udev_device + * + * access to sysfs/kernel devices + */ struct udev_device; +struct udev_device *udev_device_ref(struct udev_device *udev_device); +void udev_device_unref(struct udev_device *udev_device); +struct udev *udev_device_get_udev(struct udev_device *udev_device); struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath); struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum); struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname); +/* udev_device_get_parent_*() does not take a reference on the returned device, it is automatically unref'd with the parent */ struct udev_device *udev_device_get_parent(struct udev_device *udev_device); -struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype); -struct udev_device *udev_device_ref(struct udev_device *udev_device); -void udev_device_unref(struct udev_device *udev_device); -struct udev *udev_device_get_udev(struct udev_device *udev_device); +struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, + const char *subsystem, const char *devtype); +/* retrieve device properties */ const char *udev_device_get_devpath(struct udev_device *udev_device); const char *udev_device_get_subsystem(struct udev_device *udev_device); const char *udev_device_get_devtype(struct udev_device *udev_device); @@ -74,42 +90,62 @@ const char *udev_device_get_action(struct udev_device *udev_device); unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device); const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr); -/* device events */ +/* + * udev_monitor + * + * access to kernel uevents and udev events + */ struct udev_monitor; -struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev, const char *name); -struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path); -int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor); struct udev_monitor *udev_monitor_ref(struct udev_monitor *udev_monitor); void udev_monitor_unref(struct udev_monitor *udev_monitor); struct udev *udev_monitor_get_udev(struct udev_monitor *udev_monitor); +/* kernel and udev generated events over netlink */ +struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev, const char *name); +/* custom socket (use netlink and filters instead) */ +struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path); +/* bind socket */ +int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor); int udev_monitor_get_fd(struct udev_monitor *udev_monitor); struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monitor); -int udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor, const char *subsystem, const char *devtype); +/* in-kernel socket filters to select messages that get delivered to a listener */ +int udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor, + const char *subsystem, const char *devtype); int udev_monitor_filter_update(struct udev_monitor *udev_monitor); int udev_monitor_filter_remove(struct udev_monitor *udev_monitor); -/* sys enumeration */ +/* + * udev_enumerate + * + * search sysfs for specific devices and provide a sorted list + */ struct udev_enumerate; -struct udev_enumerate *udev_enumerate_new(struct udev *udev); struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate); void udev_enumerate_unref(struct udev_enumerate *udev_enumerate); struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate); +struct udev_enumerate *udev_enumerate_new(struct udev *udev); +/* device properties filter */ int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem); int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem); int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value); int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value); int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value); int udev_enumerate_add_syspath(struct udev_enumerate *udev_enumerate, const char *syspath); +/* run enumeration with active filters */ int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate); int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate); +/* return device list */ struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate); -/* event queue */ +/* + * udev_queue + * + * access to the currently running udev events + */ struct udev_queue; -struct udev_queue *udev_queue_new(struct udev *udev); struct udev_queue *udev_queue_ref(struct udev_queue *udev_queue); void udev_queue_unref(struct udev_queue *udev_queue); struct udev *udev_queue_get_udev(struct udev_queue *udev_queue); +struct udev_queue *udev_queue_new(struct udev *udev); unsigned long long int udev_queue_get_kernel_seqnum(struct udev_queue *udev_queue); unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue); int udev_queue_get_udev_is_active(struct udev_queue *udev_queue); |