gen/asl_file.h

   1 #ifndef __ASL_FILE_H__
   2 #define __ASL_FILE_H__
   3
   4 /*
   5  * Copyright (c) 2007 Apple Inc.  All rights reserved.
   6  *
   7  * @APPLE_LICENSE_HEADER_START@
   8  *
   9  * "Portions Copyright (c) 2007 Apple Inc.  All Rights
  10  * Reserved.  This file contains Original Code and/or Modifications of
  11  * Original Code as defined in and that are subject to the Apple Public
  12  * Source License Version 1.0 (the 'License').  You may not use this file
  13  * except in compliance with the License.  Please obtain a copy of the
  14  * License at http://www.apple.com/publicsource and read it before using
  15  * this file.
  16  *
  17  * The Original Code and all software distributed under the License are
  18  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  19  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  20  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  22  * License for the specific language governing rights and limitations
  23  * under the License."
  24  *
  25  * @APPLE_LICENSE_HEADER_END@
  26  */
  27
  28 #include <stdio.h>
  29 #include <stdint.h>
  30 #include <sys/types.h>
  31 #include <asl.h>
  32
  33 #define DB_HEADER_LEN 80
  34 #define DB_HEADER_COOKIE_OFFSET 0
  35 #define DB_HEADER_VERS_OFFSET 12
  36 #define DB_HEADER_FIRST_OFFSET 16
  37 #define DB_HEADER_TIME_OFFSET 24
  38 #define DB_HEADER_CSIZE_OFFSET 32
  39 #define DB_HEADER_LAST_OFFSET 36
  40
  41 /*
  42  * Magic Cookie for database files.
  43  * MAXIMUM 12 CHARS! (DB_HEADER_VERS_OFFSET)
  44  */
  45 #define ASL_DB_COOKIE "ASL DB"
  46 #define ASL_DB_COOKIE_LEN 6
  47 #define DB_VERSION 2
  48 #define DB_VERSION_LEGACY_1 1
  49
  50 #define ASL_FILE_FLAG_READ_ONLY                 0x00000001
  51 #define ASL_FILE_FLAG_UNLIMITED_CACHE   0x00000002
  52 #define ASL_FILE_FLAG_PRESERVE_MSG_ID   0x00000004
  53 #define ASL_FILE_FLAG_LEGACY_STORE              0x00000008
  54
  55 #define ASL_FILE_TYPE_MSG 0
  56 #define ASL_FILE_TYPE_STR 1
  57
  58 #define ASL_FILE_POSITION_FIRST 0
  59 #define ASL_FILE_POSITION_PREVIOUS 1
  60 #define ASL_FILE_POSITION_NEXT 2
  61 #define ASL_FILE_POSITION_LAST 3
  62
  63 /* NB CACHE_SIZE must be > 1 */
  64 #define CACHE_SIZE 256
  65
  66 /* Size of the fixed-length part of a MSG record */
  67 #define MSG_RECORD_FIXED_LENGTH 122
  68
  69 /*
  70  * The first record (header) in the database has the format:
  71  *
  72  * | 12     | 4    | 8      | 8    | 4                 | 8    | 36   | (80 bytes)
  73  * | Cookie | Vers | First  | Time | String cache size | Last | Zero |
  74  *
  75  * MSG records have the format:
  76  *
  77  * | 2  | 4   | 8    | 8  | 8    | 4    | 2     | 2     | 4   | 4   | 4   | 4    | 4    | 4      | 4
  78  * | 00 | Len | Next | ID | Time | Nano | Level | Flags | PID | UID | GID | RUID | RGID | RefPID | KV count ...
  79  *
  80  * | 8    | 8      | 8        | 8       | 8       | 8       | 8    | 8    |     | 8
  81  * | Host | Sender | Facility | Message | RefProc | Session | Key0 | Val0 | ... | Previous |
  82  *
  83  * STR records have the format:
  84  *
  85  * | 2  | 4   | Len      | (Len + 6 bytes)
  86  * | 01 | Len | Data+NUL |
  87  *
  88  */
  89
  90 typedef struct file_string_s
  91 {
  92         uint64_t where;
  93         uint32_t hash;
  94         struct file_string_s *next;
  95         char str[];
  96 } file_string_t;
  97
  98 typedef struct
  99 {
 100         uint32_t flags;
 101         uint32_t version;
 102         uint32_t string_count;
 103         file_string_t *string_list;
 104         uint64_t first;
 105         uint64_t last;
 106         uint64_t prev;
 107         uint64_t cursor;
 108         uint64_t cursor_xid;
 109         uint64_t dob;
 110         size_t file_size;
 111         FILE *store;
 112         void *legacy;
 113         char *scratch;
 114 } asl_file_t;
 115
 116 typedef struct asl_file_list_s
 117 {
 118         asl_file_t *file;
 119         struct asl_file_list_s *next;
 120 } asl_file_list_t;
 121
 122 asl_file_list_t *asl_file_list_add(asl_file_list_t *list, asl_file_t *f);
 123 void asl_file_list_close(asl_file_list_t *list);
 124
 125 uint32_t asl_file_open_write(const char *path, mode_t mode, uid_t uid, gid_t gid, asl_file_t **s);
 126 uint32_t asl_file_close(asl_file_t *s);
 127
 128 uint32_t asl_file_save(asl_file_t *s, aslmsg msg, uint64_t *mid);
 129
 130 uint32_t asl_file_open_read(const char *path, asl_file_t **s);
 131 uint32_t asl_file_fetch(asl_file_t *s, uint64_t mid, aslmsg *msg);
 132
 133 uint32_t asl_file_read_set_position(asl_file_t *s, uint32_t pos);
 134 uint32_t asl_file_fetch_next(asl_file_t *s, aslmsg *msg);
 135 uint32_t asl_file_fetch_previous(asl_file_t *s, aslmsg *msg);
 136
 137 uint32_t asl_file_match(asl_file_t *s, aslresponse query, aslresponse *res, uint64_t *last_id, uint64_t start_id, uint32_t count, int32_t direction);
 138 uint32_t asl_file_list_match_timeout(asl_file_list_t *list, aslresponse query, aslresponse *res, uint64_t *last_id, uint64_t start_id, uint32_t count, int32_t direction, uint32_t usec);
 139 uint32_t asl_file_list_match(asl_file_list_t *list, aslresponse query, aslresponse *res, uint64_t *last_id, uint64_t start_id, uint32_t count, int32_t direction);
 140
 141 void *asl_file_list_match_start(asl_file_list_t *list, uint64_t start_id, int32_t direction);
 142 uint32_t asl_file_list_match_next(void *token, aslresponse query, aslresponse *res, uint32_t count);
 143 void asl_file_list_match_end(void *token);
 144
 145 size_t asl_file_size(asl_file_t *s);
 146 uint64_t asl_file_ctime(asl_file_t *s);
 147
 148 uint32_t asl_file_compact(asl_file_t *s, const char *path, mode_t mode, uid_t uid, gid_t gid);
 149
 150 #endif __ASL_FILE_H__