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Commit | Line | Data |
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8dfc8dbe GKH |
1 | /* |
2 | * udevdb.c | |
3 | * | |
4 | * Userspace devfs | |
5 | * | |
6 | * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com> | |
7 | * Copyright (C) 2003 IBM Corp. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation version 2 of the License. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | */ | |
23 | ||
8e41d35d DS |
24 | /* |
25 | * udev database library | |
26 | */ | |
d546791d | 27 | #define _KLIBC_HAS_ARCH_SIG_ATOMIC_T |
8e41d35d DS |
28 | #include <stdlib.h> |
29 | #include <stdio.h> | |
30 | #include <fcntl.h> | |
31 | #include <string.h> | |
32 | #include <sys/stat.h> | |
33 | #include <errno.h> | |
a2822451 | 34 | #include <signal.h> |
8e41d35d | 35 | |
6739707d GKH |
36 | #include "udev_version.h" |
37 | #include "udev.h" | |
38 | #include "namedev.h" | |
8e41d35d | 39 | #include "udevdb.h" |
a2822451 | 40 | #include "tdb/tdb.h" |
ca999860 | 41 | #include "libsysfs/libsysfs.h" |
8e41d35d | 42 | |
dbfc520c | 43 | static TDB_CONTEXT *udevdb; |
8e41d35d | 44 | |
ca999860 | 45 | |
5840bc63 | 46 | int udevdb_add_dev(const char *path, const struct udevice *dev) |
ca999860 GKH |
47 | { |
48 | TDB_DATA key, data; | |
5840bc63 | 49 | char keystr[SYSFS_PATH_MAX]; |
ca999860 | 50 | |
5840bc63 GKH |
51 | if ((path == NULL) || (dev == NULL)) |
52 | return -ENODEV; | |
ca999860 | 53 | |
5840bc63 | 54 | memset(keystr, 0, NAME_SIZE); |
ca999860 | 55 | strcpy(keystr, path); |
5840bc63 | 56 | key.dptr = keystr; |
ca999860 | 57 | key.dsize = strlen(keystr) + 1; |
f7b4eca4 | 58 | |
5840bc63 GKH |
59 | data.dptr = (void *)dev; |
60 | data.dsize = sizeof(*dev); | |
ca999860 | 61 | |
5840bc63 | 62 | return tdb_store(udevdb, key, data, TDB_REPLACE); |
ca999860 GKH |
63 | } |
64 | ||
a56ef382 | 65 | int udevdb_get_dev(const char *path, struct udevice *dev) |
8e41d35d DS |
66 | { |
67 | TDB_DATA key, data; | |
8e41d35d | 68 | |
5840bc63 | 69 | if (path == NULL) |
a56ef382 | 70 | return -ENODEV; |
8e41d35d | 71 | |
5840bc63 GKH |
72 | key.dptr = (void *)path; |
73 | key.dsize = strlen(path) + 1; | |
8e41d35d | 74 | |
dbfc520c | 75 | data = tdb_fetch(udevdb, key); |
8e41d35d | 76 | if (data.dptr == NULL || data.dsize == 0) |
a56ef382 | 77 | return -ENODEV; |
f7b4eca4 | 78 | |
5840bc63 | 79 | memcpy(dev, data.dptr, sizeof(*dev)); |
a56ef382 | 80 | return 0; |
8e41d35d DS |
81 | } |
82 | ||
5840bc63 | 83 | int udevdb_delete_dev(const char *path) |
8e41d35d DS |
84 | { |
85 | TDB_DATA key; | |
5840bc63 | 86 | char keystr[SYSFS_PATH_MAX]; |
8e41d35d | 87 | |
5840bc63 GKH |
88 | if (path == NULL) |
89 | return -EINVAL; | |
a9ce0a41 GKH |
90 | |
91 | memset(keystr, 0, sizeof(keystr)); | |
92 | strcpy(keystr, path); | |
93 | ||
94 | key.dptr = keystr; | |
95 | key.dsize = strlen(keystr) + 1; | |
f7b4eca4 | 96 | |
a9ce0a41 GKH |
97 | return tdb_delete(udevdb, key); |
98 | } | |
99 | ||
dbfc520c DS |
100 | /** |
101 | * udevdb_exit: closes database | |
102 | */ | |
103 | void udevdb_exit(void) | |
104 | { | |
5840bc63 GKH |
105 | if (udevdb != NULL) { |
106 | tdb_close(udevdb); | |
107 | udevdb = NULL; | |
108 | } | |
dbfc520c DS |
109 | } |
110 | ||
111 | /** | |
112 | * udevdb_init: initializes database | |
f7b4eca4 KS |
113 | * @init_flag: UDEVDB_INTERNAL - database stays in memory |
114 | * UDEVDB_DEFAULT - database is written to a file | |
dbfc520c DS |
115 | */ |
116 | int udevdb_init(int init_flag) | |
117 | { | |
118 | if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL) | |
5840bc63 | 119 | return -EINVAL; |
dbfc520c | 120 | |
c056c514 | 121 | udevdb = tdb_open(udev_db_filename, 0, init_flag, O_RDWR | O_CREAT, 0644); |
5840bc63 GKH |
122 | if (udevdb == NULL) { |
123 | if (init_flag == UDEVDB_INTERNAL) | |
f7b4eca4 | 124 | dbg("unable to initialize in-memory database"); |
5840bc63 | 125 | else |
f7b4eca4 | 126 | dbg("unable to initialize database at '%s'", udev_db_filename); |
5840bc63 GKH |
127 | return -EINVAL; |
128 | } | |
129 | return 0; | |
dbfc520c | 130 | } |
f4dc8d11 KS |
131 | |
132 | /** | |
4070d2fe | 133 | * udevdb_open_ro: open database for reading |
f4dc8d11 KS |
134 | */ |
135 | int udevdb_open_ro(void) | |
136 | { | |
137 | udevdb = tdb_open(udev_db_filename, 0, 0, O_RDONLY, 0); | |
138 | if (udevdb == NULL) { | |
139 | dbg("unable to open database at '%s'", udev_db_filename); | |
140 | return -EINVAL; | |
141 | } | |
142 | return 0; | |
143 | } |