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180 lines
8.5 KiB
C
180 lines
8.5 KiB
C
/*
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* libudev - interface to udev device information
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*
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* Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*/
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#ifndef _LIBUDEV_H_
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#define _LIBUDEV_H_
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#include <stdarg.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* udev - library context
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*
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* reads the udev config and system environment
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* allows custom logging
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*/
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struct udev;
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struct udev *udev_ref(struct udev *udev);
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void udev_unref(struct udev *udev);
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struct udev *udev_new(void);
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void udev_set_log_fn(struct udev *udev,
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void (*log_fn)(struct udev *udev,
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int priority, const char *file, int line, const char *fn,
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const char *format, va_list args));
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int udev_get_log_priority(struct udev *udev);
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void udev_set_log_priority(struct udev *udev, int priority);
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const char *udev_get_sys_path(struct udev *udev);
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const char *udev_get_dev_path(struct udev *udev);
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void *udev_get_userdata(struct udev *udev);
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void udev_set_userdata(struct udev *udev, void *userdata);
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/*
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* udev_list
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*
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* access to libudev generated lists
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*/
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struct udev_list_entry;
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struct udev_list_entry *udev_list_entry_get_next(struct udev_list_entry *list_entry);
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struct udev_list_entry *udev_list_entry_get_by_name(struct udev_list_entry *list_entry, const char *name);
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const char *udev_list_entry_get_name(struct udev_list_entry *list_entry);
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const char *udev_list_entry_get_value(struct udev_list_entry *list_entry);
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/**
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* udev_list_entry_foreach:
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* @list_entry: entry to store the current position
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* @first_entry: first entry to start with
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*
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* Helper to iterate over all entries of a list.
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*/
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#define udev_list_entry_foreach(list_entry, first_entry) \
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for (list_entry = first_entry; \
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list_entry != NULL; \
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list_entry = udev_list_entry_get_next(list_entry))
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/*
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* udev_device
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*
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* access to sysfs/kernel devices
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*/
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struct udev_device;
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struct udev_device *udev_device_ref(struct udev_device *udev_device);
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void udev_device_unref(struct udev_device *udev_device);
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struct udev *udev_device_get_udev(struct udev_device *udev_device);
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struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath);
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struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum);
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struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname);
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struct udev_device *udev_device_new_from_environment(struct udev *udev);
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/* udev_device_get_parent_*() does not take a reference on the returned device, it is automatically unref'd with the parent */
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struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
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struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device,
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const char *subsystem, const char *devtype);
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/* retrieve device properties */
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const char *udev_device_get_devpath(struct udev_device *udev_device);
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const char *udev_device_get_subsystem(struct udev_device *udev_device);
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const char *udev_device_get_devtype(struct udev_device *udev_device);
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const char *udev_device_get_syspath(struct udev_device *udev_device);
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const char *udev_device_get_sysname(struct udev_device *udev_device);
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const char *udev_device_get_sysnum(struct udev_device *udev_device);
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const char *udev_device_get_devnode(struct udev_device *udev_device);
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int udev_device_get_is_initialized(struct udev_device *udev_device);
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struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device);
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struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device);
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struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device);
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struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device);
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const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key);
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const char *udev_device_get_driver(struct udev_device *udev_device);
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dev_t udev_device_get_devnum(struct udev_device *udev_device);
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const char *udev_device_get_action(struct udev_device *udev_device);
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unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device);
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unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device);
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const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr);
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/*
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* udev_monitor
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*
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* access to kernel uevents and udev events
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*/
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struct udev_monitor;
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struct udev_monitor *udev_monitor_ref(struct udev_monitor *udev_monitor);
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void udev_monitor_unref(struct udev_monitor *udev_monitor);
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struct udev *udev_monitor_get_udev(struct udev_monitor *udev_monitor);
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/* kernel and udev generated events over netlink */
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struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev, const char *name);
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/* custom socket (use netlink and filters instead) */
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struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path);
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/* bind socket */
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int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor);
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int udev_monitor_set_receive_buffer_size(struct udev_monitor *udev_monitor, int size);
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int udev_monitor_get_fd(struct udev_monitor *udev_monitor);
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struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monitor);
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/* in-kernel socket filters to select messages that get delivered to a listener */
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int udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor,
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const char *subsystem, const char *devtype);
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int udev_monitor_filter_add_match_tag(struct udev_monitor *udev_monitor, const char *tag);
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int udev_monitor_filter_update(struct udev_monitor *udev_monitor);
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int udev_monitor_filter_remove(struct udev_monitor *udev_monitor);
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/*
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* udev_enumerate
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*
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* search sysfs for specific devices and provide a sorted list
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*/
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struct udev_enumerate;
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struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate);
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void udev_enumerate_unref(struct udev_enumerate *udev_enumerate);
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struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate);
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struct udev_enumerate *udev_enumerate_new(struct udev *udev);
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/* device properties filter */
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int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem);
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int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem);
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int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value);
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int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value);
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int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value);
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int udev_enumerate_add_match_sysname(struct udev_enumerate *udev_enumerate, const char *sysname);
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int udev_enumerate_add_match_tag(struct udev_enumerate *udev_enumerate, const char *tag);
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int udev_enumerate_add_match_is_initialized(struct udev_enumerate *udev_enumerate);
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int udev_enumerate_add_syspath(struct udev_enumerate *udev_enumerate, const char *syspath);
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/* run enumeration with active filters */
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int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate);
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int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate);
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/* return device list */
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struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate);
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/*
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* udev_queue
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*
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* access to the currently running udev events
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*/
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struct udev_queue;
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struct udev_queue *udev_queue_ref(struct udev_queue *udev_queue);
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void udev_queue_unref(struct udev_queue *udev_queue);
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struct udev *udev_queue_get_udev(struct udev_queue *udev_queue);
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struct udev_queue *udev_queue_new(struct udev *udev);
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unsigned long long int udev_queue_get_kernel_seqnum(struct udev_queue *udev_queue);
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unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue);
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int udev_queue_get_udev_is_active(struct udev_queue *udev_queue);
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int udev_queue_get_queue_is_empty(struct udev_queue *udev_queue);
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int udev_queue_get_seqnum_is_finished(struct udev_queue *udev_queue, unsigned long long int seqnum);
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int udev_queue_get_seqnum_sequence_is_finished(struct udev_queue *udev_queue,
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unsigned long long int start, unsigned long long int end);
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struct udev_list_entry *udev_queue_get_queued_list_entry(struct udev_queue *udev_queue);
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struct udev_list_entry *udev_queue_get_failed_list_entry(struct udev_queue *udev_queue);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif
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