libudev/libudev-private.h

   1 /*
   2  * libudev - interface to udev device information
   3  *
   4  * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
   5  *
   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.
  10  */
  11
  12 #ifndef _LIBUDEV_PRIVATE_H_
  13 #define _LIBUDEV_PRIVATE_H_
  14
  15 #include <syslog.h>
  16 #include <signal.h>
  17 #include <stdint.h>
  18 #include <stdbool.h>
  19 #include "libudev.h"
  20
  21 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  22 #define READ_END                                0
  23 #define WRITE_END                               1
  24
  25 static inline void __attribute__((always_inline, format(printf, 2, 3)))
  26 udev_log_null(struct udev *udev, const char *format, ...) {}
  27
  28 #define udev_log_cond(udev, prio, arg...) \
  29   do { \
  30     if (udev_get_log_priority(udev) >= prio) \
  31       udev_log(udev, prio, __FILE__, __LINE__, __FUNCTION__, ## arg); \
  32   } while (0)
  33
  34 #ifdef ENABLE_LOGGING
  35 #  ifdef ENABLE_DEBUG
  36 #    define dbg(udev, arg...) udev_log_cond(udev, LOG_DEBUG, ## arg)
  37 #  else
  38 #    define dbg(udev, arg...) udev_log_null(udev, ## arg)
  39 #  endif
  40 #  define info(udev, arg...) udev_log_cond(udev, LOG_INFO, ## arg)
  41 #  define err(udev, arg...) udev_log_cond(udev, LOG_ERR, ## arg)
  42 #else
  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)
  46 #endif
  47
  48 #define UDEV_EXPORT __attribute__ ((visibility("default")))
  49
  50 static inline void udev_log_init(const char *program_name)
  51 {
  52         openlog(program_name, LOG_PID | LOG_CONS, LOG_DAEMON);
  53 }
  54
  55 static inline void udev_log_close(void)
  56 {
  57         closelog();
  58 }
  59
  60 /* libudev.c */
  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);
  70
  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_get_timeout(struct udev_device *udev_device);
  94 unsigned long long udev_device_get_usec_initialized(struct udev_device *udev_device);
  95 void udev_device_set_usec_initialized(struct udev_device *udev_device, unsigned long long usec_initialized);
  96 int udev_device_get_devlink_priority(struct udev_device *udev_device);
  97 int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio);
  98 int udev_device_get_watch_handle(struct udev_device *udev_device);
  99 int udev_device_set_watch_handle(struct udev_device *udev_device, int handle);
 100 int udev_device_get_ifindex(struct udev_device *udev_device);
 101 void udev_device_set_info_loaded(struct udev_device *device);
 102 bool udev_device_get_db_persist(struct udev_device *udev_device);
 103 void udev_device_set_db_persist(struct udev_device *udev_device);
 104
 105 /* libudev-device-private.c */
 106 int udev_device_update_db(struct udev_device *udev_device);
 107 int udev_device_delete_db(struct udev_device *udev_device);
 108 int udev_device_tag_index(struct udev_device *dev, struct udev_device *dev_old, bool add);
 109
 110 /* libudev-monitor.c - netlink/unix socket communication  */
 111 int udev_monitor_disconnect(struct udev_monitor *udev_monitor);
 112 int udev_monitor_allow_unicast_sender(struct udev_monitor *udev_monitor, struct udev_monitor *sender);
 113 int udev_monitor_send_device(struct udev_monitor *udev_monitor,
 114                              struct udev_monitor *destination, struct udev_device *udev_device);
 115 struct udev_monitor *udev_monitor_new_from_netlink_fd(struct udev *udev, const char *name, int fd);
 116
 117 /* libudev-ctrl.c - daemon runtime setup */
 118 struct udev_ctrl;
 119 struct udev_ctrl *udev_ctrl_new_from_socket(struct udev *udev, const char *socket_path);
 120 struct udev_ctrl *udev_ctrl_new_from_socket_fd(struct udev *udev, const char *socket_path, int fd);
 121 int udev_ctrl_enable_receiving(struct udev_ctrl *uctrl);
 122 struct udev_ctrl *udev_ctrl_ref(struct udev_ctrl *uctrl);
 123 struct udev_ctrl *udev_ctrl_unref(struct udev_ctrl *uctrl);
 124 struct udev *udev_ctrl_get_udev(struct udev_ctrl *uctrl);
 125 int udev_ctrl_get_fd(struct udev_ctrl *uctrl);
 126 int udev_ctrl_send_set_log_level(struct udev_ctrl *uctrl, int priority, int timeout);
 127 int udev_ctrl_send_stop_exec_queue(struct udev_ctrl *uctrl, int timeout);
 128 int udev_ctrl_send_start_exec_queue(struct udev_ctrl *uctrl, int timeout);
 129 int udev_ctrl_send_reload_rules(struct udev_ctrl *uctrl, int timeout);
 130 int udev_ctrl_send_ping(struct udev_ctrl *uctrl, int timeout);
 131 int udev_ctrl_send_exit(struct udev_ctrl *uctrl, int timeout);
 132 int udev_ctrl_send_set_env(struct udev_ctrl *uctrl, const char *key, int timeout);
 133 int udev_ctrl_send_set_children_max(struct udev_ctrl *uctrl, int count, int timeout);
 134 struct udev_ctrl_connection;
 135 struct udev_ctrl_connection *udev_ctrl_get_connection(struct udev_ctrl *uctrl);
 136 struct udev_ctrl_connection *udev_ctrl_connection_ref(struct udev_ctrl_connection *conn);
 137 struct udev_ctrl_connection *udev_ctrl_connection_unref(struct udev_ctrl_connection *conn);
 138 struct udev_ctrl_msg;
 139 struct udev_ctrl_msg *udev_ctrl_receive_msg(struct udev_ctrl_connection *conn);
 140 struct udev_ctrl_msg *udev_ctrl_msg_ref(struct udev_ctrl_msg *ctrl_msg);
 141 struct udev_ctrl_msg *udev_ctrl_msg_unref(struct udev_ctrl_msg *ctrl_msg);
 142 int udev_ctrl_get_set_log_level(struct udev_ctrl_msg *ctrl_msg);
 143 int udev_ctrl_get_stop_exec_queue(struct udev_ctrl_msg *ctrl_msg);
 144 int udev_ctrl_get_start_exec_queue(struct udev_ctrl_msg *ctrl_msg);
 145 int udev_ctrl_get_reload_rules(struct udev_ctrl_msg *ctrl_msg);
 146 int udev_ctrl_get_ping(struct udev_ctrl_msg *ctrl_msg);
 147 int udev_ctrl_get_exit(struct udev_ctrl_msg *ctrl_msg);
 148 const char *udev_ctrl_get_set_env(struct udev_ctrl_msg *ctrl_msg);
 149 int udev_ctrl_get_set_children_max(struct udev_ctrl_msg *ctrl_msg);
 150
 151 /* libudev-list.c */
 152 enum udev_list_flags {
 153         UDEV_LIST_NONE =        0,
 154         UDEV_LIST_UNIQUE =      1,
 155         UDEV_LIST_SORT =        1 << 1,
 156 };
 157 struct udev_list_node {
 158         struct udev_list_node *next, *prev;
 159 };
 160 #define UDEV_LIST(list) struct udev_list_node list = { &(list), &(list) }
 161 void udev_list_init(struct udev_list_node *list);
 162 int udev_list_is_empty(struct udev_list_node *list);
 163 void udev_list_node_append(struct udev_list_node *new, struct udev_list_node *list);
 164 void udev_list_node_remove(struct udev_list_node *entry);
 165 #define udev_list_node_foreach(node, list) \
 166         for (node = (list)->next; \
 167              node != list; \
 168              node = (node)->next)
 169 #define udev_list_node_foreach_safe(node, tmp, list) \
 170         for (node = (list)->next, tmp = (node)->next; \
 171              node != list; \
 172              node = tmp, tmp = (tmp)->next)
 173 struct udev_list_entry *udev_list_entry_add(struct udev *udev, struct udev_list_node *list,
 174                                                    const char *name, const char *value, unsigned int flags);
 175 void udev_list_entry_delete(struct udev_list_entry *entry);
 176 void udev_list_entry_remove(struct udev_list_entry *entry);
 177 void udev_list_entry_insert_before(struct udev_list_entry *new, struct udev_list_entry *entry);
 178 void udev_list_entry_append(struct udev_list_entry *new, struct udev_list_node *list);
 179 void udev_list_cleanup_entries(struct udev *udev, struct udev_list_node *name_list);
 180 struct udev_list_entry *udev_list_get_entry(struct udev_list_node *list);
 181 int udev_list_entry_get_num(struct udev_list_entry *list_entry);
 182 void udev_list_entry_set_num(struct udev_list_entry *list_entry, int num);
 183 #define udev_list_entry_foreach_safe(entry, tmp, first) \
 184         for (entry = first, tmp = udev_list_entry_get_next(entry); \
 185              entry != NULL; \
 186              entry = tmp, tmp = udev_list_entry_get_next(tmp))
 187
 188 /* libudev-queue.c */
 189 unsigned long long int udev_get_kernel_seqnum(struct udev *udev);
 190 int udev_queue_read_seqnum(FILE *queue_file, unsigned long long int *seqnum);
 191 ssize_t udev_queue_read_devpath(FILE *queue_file, char *devpath, size_t size);
 192 ssize_t udev_queue_skip_devpath(FILE *queue_file);
 193
 194 /* libudev-queue-private.c */
 195 struct udev_queue_export *udev_queue_export_new(struct udev *udev);
 196 struct udev_queue_export *udev_queue_export_unref(struct udev_queue_export *udev_queue_export);
 197 void udev_queue_export_cleanup(struct udev_queue_export *udev_queue_export);
 198 int udev_queue_export_device_queued(struct udev_queue_export *udev_queue_export, struct udev_device *udev_device);
 199 int udev_queue_export_device_finished(struct udev_queue_export *udev_queue_export, struct udev_device *udev_device);
 200 int udev_queue_export_device_failed(struct udev_queue_export *udev_queue_export, struct udev_device *udev_device);
 201
 202 /* libudev-util.c */
 203 #define UTIL_PATH_SIZE                          1024
 204 #define UTIL_NAME_SIZE                          512
 205 #define UTIL_LINE_SIZE                          16384
 206 #define UDEV_ALLOWED_CHARS_INPUT                "/ $%?,"
 207 ssize_t util_get_sys_subsystem(struct udev *udev, const char *syspath, char *subsystem, size_t size);
 208 ssize_t util_get_sys_driver(struct udev *udev, const char *syspath, char *driver, size_t size);
 209 int util_resolve_sys_link(struct udev *udev, char *syspath, size_t size);
 210 int util_log_priority(const char *priority);
 211 size_t util_path_encode(const char *src, char *dest, size_t size);
 212 size_t util_path_decode(char *s);
 213 void util_remove_trailing_chars(char *path, char c);
 214 size_t util_strpcpy(char **dest, size_t size, const char *src);
 215 size_t util_strpcpyl(char **dest, size_t size, const char *src, ...) __attribute__((sentinel));
 216 size_t util_strscpy(char *dest, size_t size, const char *src);
 217 size_t util_strscpyl(char *dest, size_t size, const char *src, ...) __attribute__((sentinel));
 218 int udev_util_replace_whitespace(const char *str, char *to, size_t len);
 219 int udev_util_replace_chars(char *str, const char *white);
 220 int udev_util_encode_string(const char *str, char *str_enc, size_t len);
 221 unsigned int util_string_hash32(const char *key);
 222 uint64_t util_string_bloom64(const char *str);
 223
 224 /* libudev-util-private.c */
 225 int util_create_path(struct udev *udev, const char *path);
 226 int util_create_path_selinux(struct udev *udev, const char *path);
 227 int util_delete_path(struct udev *udev, const char *path);
 228 int util_unlink_secure(struct udev *udev, const char *filename);
 229 uid_t util_lookup_user(struct udev *udev, const char *user);
 230 gid_t util_lookup_group(struct udev *udev, const char *group);
 231 int util_resolve_subsys_kernel(struct udev *udev, const char *string,
 232                                       char *result, size_t maxsize, int read_value);
 233 unsigned long long now_usec(void);
 234
 235 /* libudev-selinux-private.c */
 236 #ifndef WITH_SELINUX
 237 static inline void udev_selinux_init(struct udev *udev) {}
 238 static inline void udev_selinux_exit(struct udev *udev) {}
 239 static inline void udev_selinux_lsetfilecon(struct udev *udev, const char *file, unsigned int mode) {}
 240 static inline void udev_selinux_setfscreatecon(struct udev *udev, const char *file, unsigned int mode) {}
 241 static inline void udev_selinux_setfscreateconat(struct udev *udev, int dfd, const char *file, unsigned int mode) {}
 242 static inline void udev_selinux_resetfscreatecon(struct udev *udev) {}
 243 #else
 244 void udev_selinux_init(struct udev *udev);
 245 void udev_selinux_exit(struct udev *udev);
 246 void udev_selinux_lsetfilecon(struct udev *udev, const char *file, unsigned int mode);
 247 void udev_selinux_setfscreatecon(struct udev *udev, const char *file, unsigned int mode);
 248 void udev_selinux_setfscreateconat(struct udev *udev, int dfd, const char *file, unsigned int mode);
 249 void udev_selinux_resetfscreatecon(struct udev *udev);
 250 #endif
 251
 252 #endif