udev.h

   1 /*
   2  * udev.h
   3  *
   4  * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
   5  * Copyright (C) 2003-2005 Kay Sievers <kay.sievers@vrfy.org>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify it
   8  *      under the terms of the GNU General Public License as published by the
   9  *      Free Software Foundation version 2 of the License.
  10  *
  11  *      This program is distributed in the hope that it will be useful, but
  12  *      WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *      General Public License for more details.
  15  *
  16  *      You should have received a copy of the GNU General Public License along
  17  *      with this program; if not, write to the Free Software Foundation, Inc.,
  18  *      675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  */
  21
  22 #ifndef _UDEV_H_
  23 #define _UDEV_H_
  24
  25 #include <sys/types.h>
  26 #include <sys/param.h>
  27
  28 #include "list.h"
  29 #include "logging.h"
  30 #include "udev_libc_wrapper.h"
  31 #include "udev_version.h"
  32
  33 #define COMMENT_CHARACTER                       '#'
  34 #define PATH_TO_NAME_CHAR                       '@'
  35 #define LINE_SIZE                               512
  36 #define NAME_SIZE                               128
  37 #define PATH_SIZE                               256
  38 #define USER_SIZE                               32
  39 #define SEQNUM_SIZE                             32
  40 #define VALUE_SIZE                              128
  41
  42 #define DEFAULT_PARTITIONS_COUNT                15
  43 #define UDEV_ALARM_TIMEOUT                      180
  44
  45 #define UDEV_MAX(a,b) ((a) > (b) ? (a) : (b))
  46
  47 /* pipes */
  48 #define READ_END                                0
  49 #define WRITE_END                               1
  50
  51 #define DB_DIR                                  ".udev/db"
  52
  53 struct udev_rules;
  54
  55 struct sysfs_device {
  56         struct list_head node;                  /* for device cache */
  57         struct sysfs_device *parent;            /* already cached parent*/
  58         char devpath[PATH_SIZE];
  59         char subsystem[NAME_SIZE];              /* $class/$bus/"drivers" */
  60         char kernel_name[NAME_SIZE];            /* device instance name */
  61         char kernel_number[NAME_SIZE];
  62         char driver[NAME_SIZE];                 /* device driver name */
  63 };
  64
  65 struct udevice {
  66         /* device event */
  67         struct sysfs_device *dev;               /* points to dev_local by default */
  68         struct sysfs_device dev_local;
  69         struct sysfs_device *dev_parent;        /* current parent device used for matching */
  70         char action[NAME_SIZE];
  71
  72         /* node */
  73         char name[PATH_SIZE];
  74         struct list_head symlink_list;
  75         int symlink_final;
  76         char owner[USER_SIZE];
  77         int owner_final;
  78         char group[USER_SIZE];
  79         int group_final;
  80         mode_t mode;
  81         int mode_final;
  82         dev_t devt;
  83
  84         /* event processing */
  85         struct list_head run_list;
  86         int run_final;
  87         struct list_head env_list;
  88         char tmp_node[PATH_SIZE];
  89         int partitions;
  90         int ignore_device;
  91         int ignore_remove;
  92         char program_result[PATH_SIZE];
  93         int test_run;
  94 };
  95
  96 /* udev_config.c */
  97 extern char udev_root[PATH_SIZE];
  98 extern char udev_config_filename[PATH_SIZE];
  99 extern char udev_rules_filename[PATH_SIZE];
 100 extern int udev_log_priority;
 101 extern int udev_run;
 102 extern void udev_config_init(void);
 103
 104 /* udev_device.c */
 105 extern struct udevice *udev_device_init(void);
 106 extern void udev_device_cleanup(struct udevice *udev);
 107 extern int udev_device_event(struct udev_rules *rules, struct udevice *udev);
 108 extern dev_t udev_device_get_devt(struct udevice *udev);
 109
 110 /* udev_sysfs.c */
 111 extern char sysfs_path[PATH_SIZE];
 112 extern int sysfs_init(void);
 113 extern void sysfs_cleanup(void);
 114 extern void sysfs_device_set_values(struct sysfs_device *dev, const char *devpath, const char *subsystem);
 115 extern struct sysfs_device *sysfs_device_get(const char *devpath);
 116 extern struct sysfs_device *sysfs_device_get_parent(struct sysfs_device *dev);
 117 extern struct sysfs_device *sysfs_device_get_parent_with_subsystem(struct sysfs_device *dev, const char *subsystem);
 118 extern char *sysfs_attr_get_value(const char *devpath, const char *attr_name);
 119
 120 /* udev_add.c */
 121 extern int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid);
 122 extern int udev_add_device(struct udevice *udev);
 123
 124 /* udev_remove.c */
 125 extern int udev_remove_device(struct udevice *udev);
 126
 127 /* udev_db.c */
 128 extern int udev_db_add_device(struct udevice *dev);
 129 extern int udev_db_delete_device(struct udevice *dev);
 130 extern int udev_db_get_device(struct udevice *udev, const char *devpath);
 131 extern int udev_db_lookup_name(const char *name, char *devpath, size_t len);
 132 extern int udev_db_get_all_entries(struct list_head *name_list);
 133
 134 /* udev_utils.c */
 135 struct name_entry {
 136         struct list_head node;
 137         char name[PATH_SIZE];
 138 };
 139 extern int log_priority(const char *priority);
 140 extern int name_list_add(struct list_head *name_list, const char *name, int sort);
 141 extern int name_list_key_add(struct list_head *name_list, const char *key, const char *value);
 142 extern void name_list_cleanup(struct list_head *name_list);
 143 extern int add_matching_files(struct list_head *name_list, const char *dirname, const char *suffix);
 144
 145 /* udev_utils_string.c */
 146 extern int strcmp_pattern(const char *p, const char *s);
 147 extern int string_is_true(const char *str);
 148 extern void remove_trailing_chars(char *path, char c);
 149 extern int utf8_encoded_valid_unichar(const char *str);
 150 extern int replace_untrusted_chars(char *str);
 151
 152 /* udev_utils_file.c */
 153 extern int create_path(const char *path);
 154 extern int delete_path(const char *path);
 155 extern int file_map(const char *filename, char **buf, size_t *bufsize);
 156 extern void file_unmap(void *buf, size_t bufsize);
 157 extern int unlink_secure(const char *filename);
 158 extern size_t buf_get_line(const char *buf, size_t buflen, size_t cur);
 159
 160 /* udev_utils_run.c */
 161 extern int pass_env_to_socket(const char *name, const char *devpath, const char *action);
 162 extern int run_program(const char *command, const char *subsystem,
 163                        char *result, size_t ressize, size_t *reslen, int log);
 164
 165 #endif