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libudev.h
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/* SPDX-License-Identifier: LGPL-2.1+ */ #ifndef _LIBUDEV_H_ #define _LIBUDEV_H_ #include <stdarg.h> #include <sys/sysmacros.h> #include <sys/types.h> #ifdef __cplusplus extern "C" { #endif /* * udev - library context * * reads the udev config and system environment * allows custom logging */ struct udev; struct udev *udev_ref(struct udev *udev); struct udev *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, const char *format, va_list args)) __attribute__ ((deprecated)); int udev_get_log_priority(struct udev *udev) __attribute__ ((deprecated)); void udev_set_log_priority(struct udev *udev, int priority) __attribute__ ((deprecated)); void *udev_get_userdata(struct udev *udev); void udev_set_userdata(struct udev *udev, void *userdata); /* * 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); const char *udev_list_entry_get_name(struct udev_list_entry *list_entry); const char *udev_list_entry_get_value(struct udev_list_entry *list_entry); /** * udev_list_entry_foreach: * @list_entry: entry to store the current position * @first_entry: first entry to start with * * Helper to iterate over all entries of a list. */ #define udev_list_entry_foreach(list_entry, first_entry) \ for (list_entry = first_entry; \ list_entry != NULL; \ list_entry = udev_list_entry_get_next(list_entry)) /* * udev_device * * access to sysfs/kernel devices */ struct udev_device; struct udev_device *udev_device_ref(struct udev_device *udev_device); struct udev_device *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); struct udev_device *udev_device_new_from_device_id(struct udev *udev, const char *id); struct udev_device *udev_device_new_from_environment(struct udev *udev); /* 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); /* 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); const char *udev_device_get_syspath(struct udev_device *udev_device); const char *udev_device_get_sysname(struct udev_device *udev_device); const char *udev_device_get_sysnum(struct udev_device *udev_device); const char *udev_device_get_devnode(struct udev_device *udev_device); int udev_device_get_is_initialized(struct udev_device *udev_device); struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device); struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device); struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device); struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device); const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key); const char *udev_device_get_driver(struct udev_device *udev_device); dev_t udev_device_get_devnum(struct udev_device *udev_device); const char *udev_device_get_action(struct udev_device *udev_device); unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device); unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device); const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr); int udev_device_set_sysattr_value(struct udev_device *udev_device, const char *sysattr, char *value); int udev_device_has_tag(struct udev_device *udev_device, const char *tag); /* * udev_monitor * * access to kernel uevents and udev events */ struct udev_monitor; struct udev_monitor *udev_monitor_ref(struct udev_monitor *udev_monitor); struct udev_monitor *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); /* bind socket */ int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor); int udev_monitor_set_receive_buffer_size(struct udev_monitor *udev_monitor, int size); int udev_monitor_get_fd(struct udev_monitor *udev_monitor); struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monitor); /* 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_add_match_tag(struct udev_monitor *udev_monitor, const char *tag); int udev_monitor_filter_update(struct udev_monitor *udev_monitor); int udev_monitor_filter_remove(struct udev_monitor *udev_monitor); /* * udev_enumerate * * search sysfs for specific devices and provide a sorted list */ struct udev_enumerate; struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate); struct udev_enumerate *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_match_sysname(struct udev_enumerate *udev_enumerate, const char *sysname); int udev_enumerate_add_match_tag(struct udev_enumerate *udev_enumerate, const char *tag); int udev_enumerate_add_match_parent(struct udev_enumerate *udev_enumerate, struct udev_device *parent); int udev_enumerate_add_match_is_initialized(struct udev_enumerate *udev_enumerate); 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); /* * udev_queue * * access to the currently running udev events */ struct udev_queue; struct udev_queue *udev_queue_ref(struct udev_queue *udev_queue); struct udev_queue *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) __attribute__ ((deprecated)); unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue) __attribute__ ((deprecated)); int udev_queue_get_udev_is_active(struct udev_queue *udev_queue); int udev_queue_get_queue_is_empty(struct udev_queue *udev_queue); int udev_queue_get_seqnum_is_finished(struct udev_queue *udev_queue, unsigned long long int seqnum) __attribute__ ((deprecated)); int udev_queue_get_seqnum_sequence_is_finished(struct udev_queue *udev_queue, unsigned long long int start, unsigned long long int end) __attribute__ ((deprecated)); int udev_queue_get_fd(struct udev_queue *udev_queue); int udev_queue_flush(struct udev_queue *udev_queue); struct udev_list_entry *udev_queue_get_queued_list_entry(struct udev_queue *udev_queue) __attribute__ ((deprecated)); /* * udev_hwdb * * access to the static hardware properties database */ struct udev_hwdb; struct udev_hwdb *udev_hwdb_new(struct udev *udev); struct udev_hwdb *udev_hwdb_ref(struct udev_hwdb *hwdb); struct udev_hwdb *udev_hwdb_unref(struct udev_hwdb *hwdb); struct udev_list_entry *udev_hwdb_get_properties_list_entry(struct udev_hwdb *hwdb, const char *modalias, unsigned int flags); /* * udev_util * * udev specific utilities */ int udev_util_encode_string(const char *str, char *str_enc, size_t len); #ifdef __cplusplus } /* extern "C" */ #endif #endif