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796b06c2 KS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
c3cfed0d | 4 | Copyright 2012 Kay Sievers <kay@vrfy.org> |
796b06c2 KS |
5 | |
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd 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 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
ccba91c7 | 19 | |
67410e9f | 20 | #include <fnmatch.h> |
796b06c2 | 21 | #include <getopt.h> |
07630cea LP |
22 | #include <stdio.h> |
23 | #include <stdlib.h> | |
ccba91c7 | 24 | |
c532d8a0 | 25 | #include "sd-hwdb.h" |
ccba91c7 | 26 | |
b5efdb8a | 27 | #include "alloc-util.h" |
c532d8a0 | 28 | #include "hwdb-util.h" |
07630cea | 29 | #include "string-util.h" |
e448a1c3 | 30 | #include "udev-util.h" |
07630cea | 31 | #include "udev.h" |
c532d8a0 TG |
32 | |
33 | static sd_hwdb *hwdb; | |
ccba91c7 | 34 | |
67410e9f | 35 | int udev_builtin_hwdb_lookup(struct udev_device *dev, |
a4bbef09 KS |
36 | const char *prefix, const char *modalias, |
37 | const char *filter, bool test) { | |
45d9a304 | 38 | _cleanup_free_ char *lookup = NULL; |
c532d8a0 | 39 | const char *key, *value; |
59803c38 KS |
40 | int n = 0; |
41 | ||
33c770b1 KS |
42 | if (!hwdb) |
43 | return -ENOENT; | |
44 | ||
a4bbef09 | 45 | if (prefix) { |
a4bbef09 KS |
46 | lookup = strjoin(prefix, modalias, NULL); |
47 | if (!lookup) | |
48 | return -ENOMEM; | |
c532d8a0 TG |
49 | modalias = lookup; |
50 | } | |
a4bbef09 | 51 | |
c532d8a0 TG |
52 | SD_HWDB_FOREACH_PROPERTY(hwdb, modalias, key, value) { |
53 | if (filter && fnmatch(filter, key, FNM_NOESCAPE) != 0) | |
67410e9f KS |
54 | continue; |
55 | ||
c532d8a0 | 56 | if (udev_builtin_add_property(dev, test, key, value) < 0) |
59803c38 KS |
57 | return -ENOMEM; |
58 | n++; | |
59 | } | |
60 | return n; | |
61 | } | |
62 | ||
63 | static const char *modalias_usb(struct udev_device *dev, char *s, size_t size) { | |
64 | const char *v, *p; | |
65 | int vn, pn; | |
66 | ||
67 | v = udev_device_get_sysattr_value(dev, "idVendor"); | |
68 | if (!v) | |
69 | return NULL; | |
70 | p = udev_device_get_sysattr_value(dev, "idProduct"); | |
71 | if (!p) | |
72 | return NULL; | |
73 | vn = strtol(v, NULL, 16); | |
74 | if (vn <= 0) | |
75 | return NULL; | |
76 | pn = strtol(p, NULL, 16); | |
77 | if (pn <= 0) | |
78 | return NULL; | |
79 | snprintf(s, size, "usb:v%04Xp%04X*", vn, pn); | |
80 | return s; | |
81 | } | |
82 | ||
67410e9f | 83 | static int udev_builtin_hwdb_search(struct udev_device *dev, struct udev_device *srcdev, |
a4bbef09 KS |
84 | const char *subsystem, const char *prefix, |
85 | const char *filter, bool test) { | |
59803c38 KS |
86 | struct udev_device *d; |
87 | char s[16]; | |
77cf759e KS |
88 | bool last = false; |
89 | int r = 0; | |
59803c38 | 90 | |
3b64e4d4 TG |
91 | assert(dev); |
92 | ||
e448a1c3 TG |
93 | if (!srcdev) |
94 | srcdev = dev; | |
95 | ||
77cf759e | 96 | for (d = srcdev; d && !last; d = udev_device_get_parent(d)) { |
59803c38 KS |
97 | const char *dsubsys; |
98 | const char *modalias = NULL; | |
99 | ||
100 | dsubsys = udev_device_get_subsystem(d); | |
101 | if (!dsubsys) | |
102 | continue; | |
103 | ||
104 | /* look only at devices of a specific subsystem */ | |
105 | if (subsystem && !streq(dsubsys, subsystem)) | |
106 | continue; | |
107 | ||
0238cf7c KS |
108 | modalias = udev_device_get_property_value(d, "MODALIAS"); |
109 | ||
77cf759e KS |
110 | if (streq(dsubsys, "usb") && streq_ptr(udev_device_get_devtype(d), "usb_device")) { |
111 | /* if the usb_device does not have a modalias, compose one */ | |
112 | if (!modalias) | |
113 | modalias = modalias_usb(d, s, sizeof(s)); | |
114 | ||
115 | /* avoid looking at any parent device, they are usually just a USB hub */ | |
116 | last = true; | |
117 | } | |
59803c38 | 118 | |
59803c38 KS |
119 | if (!modalias) |
120 | continue; | |
67410e9f | 121 | |
77cf759e KS |
122 | r = udev_builtin_hwdb_lookup(dev, prefix, modalias, filter, test); |
123 | if (r > 0) | |
59803c38 KS |
124 | break; |
125 | } | |
126 | ||
77cf759e | 127 | return r; |
59803c38 KS |
128 | } |
129 | ||
2001208c KS |
130 | static int builtin_hwdb(struct udev_device *dev, int argc, char *argv[], bool test) { |
131 | static const struct option options[] = { | |
67410e9f KS |
132 | { "filter", required_argument, NULL, 'f' }, |
133 | { "device", required_argument, NULL, 'd' }, | |
2001208c | 134 | { "subsystem", required_argument, NULL, 's' }, |
a4bbef09 | 135 | { "lookup-prefix", required_argument, NULL, 'p' }, |
2001208c | 136 | {} |
796b06c2 | 137 | }; |
67410e9f KS |
138 | const char *filter = NULL; |
139 | const char *device = NULL; | |
59803c38 | 140 | const char *subsystem = NULL; |
a4bbef09 | 141 | const char *prefix = NULL; |
e448a1c3 | 142 | _cleanup_udev_device_unref_ struct udev_device *srcdev = NULL; |
ccba91c7 | 143 | |
2001208c KS |
144 | if (!hwdb) |
145 | return EXIT_FAILURE; | |
ccba91c7 | 146 | |
2001208c KS |
147 | for (;;) { |
148 | int option; | |
ccba91c7 | 149 | |
a4bbef09 | 150 | option = getopt_long(argc, argv, "f:d:s:p:", options, NULL); |
2001208c KS |
151 | if (option == -1) |
152 | break; | |
ccba91c7 | 153 | |
2001208c | 154 | switch (option) { |
67410e9f KS |
155 | case 'f': |
156 | filter = optarg; | |
157 | break; | |
158 | ||
159 | case 'd': | |
160 | device = optarg; | |
161 | break; | |
162 | ||
2001208c | 163 | case 's': |
59803c38 | 164 | subsystem = optarg; |
2001208c | 165 | break; |
a4bbef09 KS |
166 | |
167 | case 'p': | |
168 | prefix = optarg; | |
169 | break; | |
912541b0 KS |
170 | } |
171 | } | |
ccba91c7 | 172 | |
6824690f KS |
173 | /* query a specific key given as argument */ |
174 | if (argv[optind]) { | |
a4bbef09 | 175 | if (udev_builtin_hwdb_lookup(dev, prefix, argv[optind], filter, test) > 0) |
6824690f KS |
176 | return EXIT_SUCCESS; |
177 | return EXIT_FAILURE; | |
178 | } | |
179 | ||
67410e9f KS |
180 | /* read data from another device than the device we will store the data */ |
181 | if (device) { | |
182 | srcdev = udev_device_new_from_device_id(udev_device_get_udev(dev), device); | |
183 | if (!srcdev) | |
184 | return EXIT_FAILURE; | |
e448a1c3 | 185 | } |
67410e9f | 186 | |
beef8df8 KS |
187 | if (udev_builtin_hwdb_search(dev, srcdev, subsystem, prefix, filter, test) > 0) |
188 | return EXIT_SUCCESS; | |
189 | return EXIT_FAILURE; | |
796b06c2 | 190 | } |
ccba91c7 | 191 | |
796b06c2 | 192 | /* called at udev startup and reload */ |
9ec6e95b | 193 | static int builtin_hwdb_init(struct udev *udev) { |
c532d8a0 TG |
194 | int r; |
195 | ||
2001208c | 196 | if (hwdb) |
5b4d50ef | 197 | return 0; |
c532d8a0 TG |
198 | |
199 | r = sd_hwdb_new(&hwdb); | |
200 | if (r < 0) | |
201 | return r; | |
202 | ||
912541b0 | 203 | return 0; |
3cf5266b | 204 | } |
ccba91c7 | 205 | |
796b06c2 | 206 | /* called on udev shutdown and reload request */ |
9ec6e95b | 207 | static void builtin_hwdb_exit(struct udev *udev) { |
c532d8a0 | 208 | hwdb = sd_hwdb_unref(hwdb); |
ccba91c7 | 209 | } |
3cf5266b | 210 | |
796b06c2 | 211 | /* called every couple of seconds during event activity; 'true' if config has changed */ |
9ec6e95b | 212 | static bool builtin_hwdb_validate(struct udev *udev) { |
c532d8a0 | 213 | return hwdb_validate(hwdb); |
796b06c2 | 214 | } |
3cf5266b | 215 | |
796b06c2 KS |
216 | const struct udev_builtin udev_builtin_hwdb = { |
217 | .name = "hwdb", | |
218 | .cmd = builtin_hwdb, | |
219 | .init = builtin_hwdb_init, | |
220 | .exit = builtin_hwdb_exit, | |
221 | .validate = builtin_hwdb_validate, | |
5ac0162c | 222 | .help = "Hardware database", |
3cf5266b | 223 | }; |