2 * libudev - interface to udev device information
4 * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
12 #ifndef _LIBUDEV_PRIVATE_H_
13 #define _LIBUDEV_PRIVATE_H_
21 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
25 static inline void __attribute__((always_inline, format(printf, 2, 3)))
26 udev_log_null(struct udev *udev, const char *format, ...) {}
28 #define udev_log_cond(udev, prio, arg...) \
30 if (udev_get_log_priority(udev) >= prio) \
31 udev_log(udev, prio, __FILE__, __LINE__, __FUNCTION__, ## arg); \
36 # define dbg(udev, arg...) udev_log_cond(udev, LOG_DEBUG, ## arg)
38 # define dbg(udev, arg...) udev_log_null(udev, ## arg)
40 # define info(udev, arg...) udev_log_cond(udev, LOG_INFO, ## arg)
41 # define err(udev, arg...) udev_log_cond(udev, LOG_ERR, ## arg)
43 # define dbg(udev, arg...) udev_log_null(udev, ## arg)
44 # define info(udev, arg...) udev_log_null(udev, ## arg)
45 # define err(udev, arg...) udev_log_null(udev, ## arg)
48 #define UDEV_EXPORT __attribute__ ((visibility("default")))
50 static inline void udev_log_init(const char *program_name)
52 openlog(program_name, LOG_PID | LOG_CONS, LOG_DAEMON);
55 static inline void udev_log_close(void)
61 void udev_log(struct udev *udev,
62 int priority, const char *file, int line, const char *fn,
63 const char *format, ...)
64 __attribute__((format(printf, 6, 7)));
65 const char *udev_get_rules_path(struct udev *udev);
66 const char *udev_get_run_config_path(struct udev *udev);
67 const char *udev_set_run_path(struct udev *udev, const char *path);
68 struct udev_list_entry *udev_add_property(struct udev *udev, const char *key, const char *value);
69 struct udev_list_entry *udev_get_properties_list_entry(struct udev *udev);
71 /* libudev-device.c */
72 struct udev_device *udev_device_new(struct udev *udev);
73 struct udev_device *udev_device_new_from_id_filename(struct udev *udev, char *id);
74 mode_t udev_device_get_devnode_mode(struct udev_device *udev_device);
75 int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath);
76 int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode);
77 int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink, int unique);
78 void udev_device_cleanup_devlinks_list(struct udev_device *udev_device);
79 struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value);
80 void udev_device_add_property_from_string_parse(struct udev_device *udev_device, const char *property);
81 int udev_device_add_property_from_string_parse_finish(struct udev_device *udev_device);
82 char **udev_device_get_properties_envp(struct udev_device *udev_device);
83 ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf);
84 int udev_device_read_db(struct udev_device *udev_device, const char *dbfile);
85 int udev_device_read_uevent_file(struct udev_device *udev_device);
86 int udev_device_set_action(struct udev_device *udev_device, const char *action);
87 const char *udev_device_get_devpath_old(struct udev_device *udev_device);
88 const char *udev_device_get_knodename(struct udev_device *udev_device);
89 const char *udev_device_get_id_filename(struct udev_device *udev_device);
90 void udev_device_set_is_initialized(struct udev_device *udev_device);
91 int udev_device_add_tag(struct udev_device *udev_device, const char *tag);
92 void udev_device_cleanup_tags_list(struct udev_device *udev_device);
93 int udev_device_has_tag(struct udev_device *udev_device, const char *tag);
94 int udev_device_get_timeout(struct udev_device *udev_device);
95 unsigned long long udev_device_get_usec_initialized(struct udev_device *udev_device);
96 void udev_device_set_usec_initialized(struct udev_device *udev_device, unsigned long long usec_initialized);
97 int udev_device_get_devlink_priority(struct udev_device *udev_device);
98 int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio);
99 int udev_device_get_watch_handle(struct udev_device *udev_device);
100 int udev_device_set_watch_handle(struct udev_device *udev_device, int handle);
101 int udev_device_get_ifindex(struct udev_device *udev_device);
102 void udev_device_set_info_loaded(struct udev_device *device);
103 bool udev_device_get_db_persist(struct udev_device *udev_device);
104 void udev_device_set_db_persist(struct udev_device *udev_device);
106 /* libudev-device-private.c */
107 int udev_device_update_db(struct udev_device *udev_device);
108 int udev_device_delete_db(struct udev_device *udev_device);
109 int udev_device_tag_index(struct udev_device *dev, struct udev_device *dev_old, bool add);
111 /* libudev-monitor.c - netlink/unix socket communication */
112 int udev_monitor_disconnect(struct udev_monitor *udev_monitor);
113 int udev_monitor_allow_unicast_sender(struct udev_monitor *udev_monitor, struct udev_monitor *sender);
114 int udev_monitor_send_device(struct udev_monitor *udev_monitor,
115 struct udev_monitor *destination, struct udev_device *udev_device);
116 struct udev_monitor *udev_monitor_new_from_netlink_fd(struct udev *udev, const char *name, int fd);
118 /* libudev-ctrl.c - daemon runtime setup */
120 struct udev_ctrl *udev_ctrl_new_from_socket(struct udev *udev, const char *socket_path);
121 struct udev_ctrl *udev_ctrl_new_from_socket_fd(struct udev *udev, const char *socket_path, int fd);
122 int udev_ctrl_enable_receiving(struct udev_ctrl *uctrl);
123 struct udev_ctrl *udev_ctrl_ref(struct udev_ctrl *uctrl);
124 struct udev_ctrl *udev_ctrl_unref(struct udev_ctrl *uctrl);
125 struct udev *udev_ctrl_get_udev(struct udev_ctrl *uctrl);
126 int udev_ctrl_get_fd(struct udev_ctrl *uctrl);
127 int udev_ctrl_send_set_log_level(struct udev_ctrl *uctrl, int priority, int timeout);
128 int udev_ctrl_send_stop_exec_queue(struct udev_ctrl *uctrl, int timeout);
129 int udev_ctrl_send_start_exec_queue(struct udev_ctrl *uctrl, int timeout);
130 int udev_ctrl_send_reload_rules(struct udev_ctrl *uctrl, int timeout);
131 int udev_ctrl_send_ping(struct udev_ctrl *uctrl, int timeout);
132 int udev_ctrl_send_exit(struct udev_ctrl *uctrl, int timeout);
133 int udev_ctrl_send_set_env(struct udev_ctrl *uctrl, const char *key, int timeout);
134 int udev_ctrl_send_set_children_max(struct udev_ctrl *uctrl, int count, int timeout);
135 struct udev_ctrl_connection;
136 struct udev_ctrl_connection *udev_ctrl_get_connection(struct udev_ctrl *uctrl);
137 struct udev_ctrl_connection *udev_ctrl_connection_ref(struct udev_ctrl_connection *conn);
138 struct udev_ctrl_connection *udev_ctrl_connection_unref(struct udev_ctrl_connection *conn);
139 struct udev_ctrl_msg;
140 struct udev_ctrl_msg *udev_ctrl_receive_msg(struct udev_ctrl_connection *conn);
141 struct udev_ctrl_msg *udev_ctrl_msg_ref(struct udev_ctrl_msg *ctrl_msg);
142 struct udev_ctrl_msg *udev_ctrl_msg_unref(struct udev_ctrl_msg *ctrl_msg);
143 int udev_ctrl_get_set_log_level(struct udev_ctrl_msg *ctrl_msg);
144 int udev_ctrl_get_stop_exec_queue(struct udev_ctrl_msg *ctrl_msg);
145 int udev_ctrl_get_start_exec_queue(struct udev_ctrl_msg *ctrl_msg);
146 int udev_ctrl_get_reload_rules(struct udev_ctrl_msg *ctrl_msg);
147 int udev_ctrl_get_ping(struct udev_ctrl_msg *ctrl_msg);
148 int udev_ctrl_get_exit(struct udev_ctrl_msg *ctrl_msg);
149 const char *udev_ctrl_get_set_env(struct udev_ctrl_msg *ctrl_msg);
150 int udev_ctrl_get_set_children_max(struct udev_ctrl_msg *ctrl_msg);
153 enum udev_list_flags {
155 UDEV_LIST_UNIQUE = 1,
156 UDEV_LIST_SORT = 1 << 1,
158 struct udev_list_node {
159 struct udev_list_node *next, *prev;
161 #define UDEV_LIST(list) struct udev_list_node list = { &(list), &(list) }
162 void udev_list_init(struct udev_list_node *list);
163 int udev_list_is_empty(struct udev_list_node *list);
164 void udev_list_node_append(struct udev_list_node *new, struct udev_list_node *list);
165 void udev_list_node_remove(struct udev_list_node *entry);
166 #define udev_list_node_foreach(node, list) \
167 for (node = (list)->next; \
170 #define udev_list_node_foreach_safe(node, tmp, list) \
171 for (node = (list)->next, tmp = (node)->next; \
173 node = tmp, tmp = (tmp)->next)
174 struct udev_list_entry *udev_list_entry_add(struct udev *udev, struct udev_list_node *list,
175 const char *name, const char *value, unsigned int flags);
176 void udev_list_entry_delete(struct udev_list_entry *entry);
177 void udev_list_entry_remove(struct udev_list_entry *entry);
178 void udev_list_entry_insert_before(struct udev_list_entry *new, struct udev_list_entry *entry);
179 void udev_list_entry_append(struct udev_list_entry *new, struct udev_list_node *list);
180 void udev_list_cleanup_entries(struct udev *udev, struct udev_list_node *name_list);
181 struct udev_list_entry *udev_list_get_entry(struct udev_list_node *list);
182 int udev_list_entry_get_num(struct udev_list_entry *list_entry);
183 void udev_list_entry_set_num(struct udev_list_entry *list_entry, int num);
184 #define udev_list_entry_foreach_safe(entry, tmp, first) \
185 for (entry = first, tmp = udev_list_entry_get_next(entry); \
187 entry = tmp, tmp = udev_list_entry_get_next(tmp))
189 /* libudev-queue.c */
190 unsigned long long int udev_get_kernel_seqnum(struct udev *udev);
191 int udev_queue_read_seqnum(FILE *queue_file, unsigned long long int *seqnum);
192 ssize_t udev_queue_read_devpath(FILE *queue_file, char *devpath, size_t size);
193 ssize_t udev_queue_skip_devpath(FILE *queue_file);
195 /* libudev-queue-private.c */
196 struct udev_queue_export *udev_queue_export_new(struct udev *udev);
197 struct udev_queue_export *udev_queue_export_unref(struct udev_queue_export *udev_queue_export);
198 void udev_queue_export_cleanup(struct udev_queue_export *udev_queue_export);
199 int udev_queue_export_device_queued(struct udev_queue_export *udev_queue_export, struct udev_device *udev_device);
200 int udev_queue_export_device_finished(struct udev_queue_export *udev_queue_export, struct udev_device *udev_device);
201 int udev_queue_export_device_failed(struct udev_queue_export *udev_queue_export, struct udev_device *udev_device);
204 #define UTIL_PATH_SIZE 1024
205 #define UTIL_NAME_SIZE 512
206 #define UTIL_LINE_SIZE 16384
207 #define UDEV_ALLOWED_CHARS_INPUT "/ $%?,"
208 ssize_t util_get_sys_subsystem(struct udev *udev, const char *syspath, char *subsystem, size_t size);
209 ssize_t util_get_sys_driver(struct udev *udev, const char *syspath, char *driver, size_t size);
210 int util_resolve_sys_link(struct udev *udev, char *syspath, size_t size);
211 int util_log_priority(const char *priority);
212 size_t util_path_encode(const char *src, char *dest, size_t size);
213 size_t util_path_decode(char *s);
214 void util_remove_trailing_chars(char *path, char c);
215 size_t util_strpcpy(char **dest, size_t size, const char *src);
216 size_t util_strpcpyl(char **dest, size_t size, const char *src, ...) __attribute__((sentinel));
217 size_t util_strscpy(char *dest, size_t size, const char *src);
218 size_t util_strscpyl(char *dest, size_t size, const char *src, ...) __attribute__((sentinel));
219 int udev_util_replace_whitespace(const char *str, char *to, size_t len);
220 int udev_util_replace_chars(char *str, const char *white);
221 int udev_util_encode_string(const char *str, char *str_enc, size_t len);
222 unsigned int util_string_hash32(const char *key);
223 uint64_t util_string_bloom64(const char *str);
225 /* libudev-util-private.c */
226 int util_create_path(struct udev *udev, const char *path);
227 int util_create_path_selinux(struct udev *udev, const char *path);
228 int util_delete_path(struct udev *udev, const char *path);
229 int util_unlink_secure(struct udev *udev, const char *filename);
230 uid_t util_lookup_user(struct udev *udev, const char *user);
231 gid_t util_lookup_group(struct udev *udev, const char *group);
232 int util_resolve_subsys_kernel(struct udev *udev, const char *string,
233 char *result, size_t maxsize, int read_value);
234 unsigned long long now_usec(void);
236 /* libudev-selinux-private.c */
238 static inline void udev_selinux_init(struct udev *udev) {}
239 static inline void udev_selinux_exit(struct udev *udev) {}
240 static inline void udev_selinux_lsetfilecon(struct udev *udev, const char *file, unsigned int mode) {}
241 static inline void udev_selinux_setfscreatecon(struct udev *udev, const char *file, unsigned int mode) {}
242 static inline void udev_selinux_setfscreateconat(struct udev *udev, int dfd, const char *file, unsigned int mode) {}
243 static inline void udev_selinux_resetfscreatecon(struct udev *udev) {}
245 void udev_selinux_init(struct udev *udev);
246 void udev_selinux_exit(struct udev *udev);
247 void udev_selinux_lsetfilecon(struct udev *udev, const char *file, unsigned int mode);
248 void udev_selinux_setfscreatecon(struct udev *udev, const char *file, unsigned int mode);
249 void udev_selinux_setfscreateconat(struct udev *udev, int dfd, const char *file, unsigned int mode);
250 void udev_selinux_resetfscreatecon(struct udev *udev);