1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
* udevdb.c
*
* Userspace devfs
*
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2003 IBM Corp.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* udev database library
*/
#define _KLIBC_HAS_ARCH_SIG_ATOMIC_T
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <errno.h>
#include <signal.h>
#include "udev_version.h"
#include "udev.h"
#include "namedev.h"
#include "udevdb.h"
#include "tdb/tdb.h"
#include "libsysfs/libsysfs.h"
static TDB_CONTEXT *udevdb;
int udevdb_add_dev(const char *path, const struct udevice *dev)
{
TDB_DATA key, data;
char keystr[SYSFS_PATH_MAX];
if ((path == NULL) || (dev == NULL))
return -ENODEV;
memset(keystr, 0, NAME_SIZE);
strcpy(keystr, path);
key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
data.dptr = (void *)dev;
data.dsize = sizeof(*dev);
return tdb_store(udevdb, key, data, TDB_REPLACE);
}
int udevdb_get_dev(const char *path, struct udevice *dev)
{
TDB_DATA key, data;
if (path == NULL)
return -ENODEV;
key.dptr = (void *)path;
key.dsize = strlen(path) + 1;
data = tdb_fetch(udevdb, key);
if (data.dptr == NULL || data.dsize == 0)
return -ENODEV;
memcpy(dev, data.dptr, sizeof(*dev));
return 0;
}
int udevdb_delete_dev(const char *path)
{
TDB_DATA key;
char keystr[SYSFS_PATH_MAX];
if (path == NULL)
return -EINVAL;
memset(keystr, 0, sizeof(keystr));
strcpy(keystr, path);
key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
return tdb_delete(udevdb, key);
}
/**
* udevdb_exit: closes database
*/
void udevdb_exit(void)
{
if (udevdb != NULL) {
tdb_close(udevdb);
udevdb = NULL;
}
}
/**
* udevdb_init: initializes database
* @init_flag: UDEVDB_INTERNAL - database stays in memory
* UDEVDB_DEFAULT - database is written to a file
*/
int udevdb_init(int init_flag)
{
if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL)
return -EINVAL;
udevdb = tdb_open(udev_db_filename, 0, init_flag, O_RDWR | O_CREAT, 0644);
if (udevdb == NULL) {
if (init_flag == UDEVDB_INTERNAL)
dbg("unable to initialize in-memory database");
else
dbg("unable to initialize database at '%s'", udev_db_filename);
return -EACCES;
}
return 0;
}
/**
* udevdb_open_ro: open database for reading
*/
int udevdb_open_ro(void)
{
udevdb = tdb_open(udev_db_filename, 0, 0, O_RDONLY, 0);
if (udevdb == NULL) {
dbg("unable to open database at '%s'", udev_db_filename);
return -EACCES;
}
return 0;
}
void (*user_record_callback) (char *path, struct udevice *dev);
static int traverse_callback(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
user_record_callback((char*) key.dptr, (struct udevice*) dbuf.dptr);
return 0;
}
/**
* udevdb_dump: dumps whole database by passing record data to user function
* @user_record_handler: user function called for every record in the database
*/
int udevdb_dump(void (*user_record_handler) (char *path, struct udevice *dev))
{
if (user_record_handler == NULL) {
dbg("invalid user record handling function");
return -EINVAL;
}
user_record_callback = user_record_handler;
tdb_traverse(udevdb, traverse_callback, NULL);
return 0;
}
|
