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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 LP |
19 | |
20 | #include <stdio.h> | |
21 | #include <errno.h> | |
22 | #include <string.h> | |
23 | #include <inttypes.h> | |
24 | #include <ctype.h> | |
25 | #include <stdlib.h> | |
67410e9f | 26 | #include <fnmatch.h> |
796b06c2 | 27 | #include <getopt.h> |
ccba91c7 | 28 | |
3cf5266b | 29 | #include "udev.h" |
ccba91c7 | 30 | |
2001208c | 31 | static struct udev_hwdb *hwdb; |
ccba91c7 | 32 | |
67410e9f | 33 | int udev_builtin_hwdb_lookup(struct udev_device *dev, |
a4bbef09 KS |
34 | const char *prefix, const char *modalias, |
35 | const char *filter, bool test) { | |
36 | struct udev_list_entry *list; | |
59803c38 KS |
37 | struct udev_list_entry *entry; |
38 | int n = 0; | |
39 | ||
33c770b1 KS |
40 | if (!hwdb) |
41 | return -ENOENT; | |
42 | ||
a4bbef09 KS |
43 | if (prefix) { |
44 | _cleanup_free_ const char *lookup; | |
45 | ||
46 | lookup = strjoin(prefix, modalias, NULL); | |
47 | if (!lookup) | |
48 | return -ENOMEM; | |
49 | list = udev_hwdb_get_properties_list_entry(hwdb, lookup, 0); | |
50 | } else | |
51 | list = udev_hwdb_get_properties_list_entry(hwdb, modalias, 0); | |
52 | ||
53 | udev_list_entry_foreach(entry, list) { | |
67410e9f KS |
54 | if (filter && fnmatch(filter, udev_list_entry_get_name(entry), FNM_NOESCAPE) != 0) |
55 | continue; | |
56 | ||
59803c38 KS |
57 | if (udev_builtin_add_property(dev, test, |
58 | udev_list_entry_get_name(entry), | |
59 | udev_list_entry_get_value(entry)) < 0) | |
60 | return -ENOMEM; | |
61 | n++; | |
62 | } | |
63 | return n; | |
64 | } | |
65 | ||
66 | static const char *modalias_usb(struct udev_device *dev, char *s, size_t size) { | |
67 | const char *v, *p; | |
68 | int vn, pn; | |
69 | ||
70 | v = udev_device_get_sysattr_value(dev, "idVendor"); | |
71 | if (!v) | |
72 | return NULL; | |
73 | p = udev_device_get_sysattr_value(dev, "idProduct"); | |
74 | if (!p) | |
75 | return NULL; | |
76 | vn = strtol(v, NULL, 16); | |
77 | if (vn <= 0) | |
78 | return NULL; | |
79 | pn = strtol(p, NULL, 16); | |
80 | if (pn <= 0) | |
81 | return NULL; | |
82 | snprintf(s, size, "usb:v%04Xp%04X*", vn, pn); | |
83 | return s; | |
84 | } | |
85 | ||
67410e9f | 86 | static int udev_builtin_hwdb_search(struct udev_device *dev, struct udev_device *srcdev, |
a4bbef09 KS |
87 | const char *subsystem, const char *prefix, |
88 | const char *filter, bool test) { | |
59803c38 KS |
89 | struct udev_device *d; |
90 | char s[16]; | |
77cf759e KS |
91 | bool last = false; |
92 | int r = 0; | |
59803c38 | 93 | |
77cf759e | 94 | for (d = srcdev; d && !last; d = udev_device_get_parent(d)) { |
59803c38 KS |
95 | const char *dsubsys; |
96 | const char *modalias = NULL; | |
97 | ||
98 | dsubsys = udev_device_get_subsystem(d); | |
99 | if (!dsubsys) | |
100 | continue; | |
101 | ||
102 | /* look only at devices of a specific subsystem */ | |
103 | if (subsystem && !streq(dsubsys, subsystem)) | |
104 | continue; | |
105 | ||
0238cf7c KS |
106 | modalias = udev_device_get_property_value(d, "MODALIAS"); |
107 | ||
77cf759e KS |
108 | if (streq(dsubsys, "usb") && streq_ptr(udev_device_get_devtype(d), "usb_device")) { |
109 | /* if the usb_device does not have a modalias, compose one */ | |
110 | if (!modalias) | |
111 | modalias = modalias_usb(d, s, sizeof(s)); | |
112 | ||
113 | /* avoid looking at any parent device, they are usually just a USB hub */ | |
114 | last = true; | |
115 | } | |
59803c38 | 116 | |
59803c38 KS |
117 | if (!modalias) |
118 | continue; | |
67410e9f | 119 | |
77cf759e KS |
120 | r = udev_builtin_hwdb_lookup(dev, prefix, modalias, filter, test); |
121 | if (r > 0) | |
59803c38 KS |
122 | break; |
123 | } | |
124 | ||
77cf759e | 125 | return r; |
59803c38 KS |
126 | } |
127 | ||
2001208c KS |
128 | static int builtin_hwdb(struct udev_device *dev, int argc, char *argv[], bool test) { |
129 | static const struct option options[] = { | |
67410e9f KS |
130 | { "filter", required_argument, NULL, 'f' }, |
131 | { "device", required_argument, NULL, 'd' }, | |
2001208c | 132 | { "subsystem", required_argument, NULL, 's' }, |
a4bbef09 | 133 | { "lookup-prefix", required_argument, NULL, 'p' }, |
2001208c | 134 | {} |
796b06c2 | 135 | }; |
67410e9f KS |
136 | const char *filter = NULL; |
137 | const char *device = NULL; | |
59803c38 | 138 | const char *subsystem = NULL; |
a4bbef09 | 139 | const char *prefix = NULL; |
67410e9f | 140 | struct udev_device *srcdev; |
ccba91c7 | 141 | |
2001208c KS |
142 | if (!hwdb) |
143 | return EXIT_FAILURE; | |
ccba91c7 | 144 | |
2001208c KS |
145 | for (;;) { |
146 | int option; | |
ccba91c7 | 147 | |
a4bbef09 | 148 | option = getopt_long(argc, argv, "f:d:s:p:", options, NULL); |
2001208c KS |
149 | if (option == -1) |
150 | break; | |
ccba91c7 | 151 | |
2001208c | 152 | switch (option) { |
67410e9f KS |
153 | case 'f': |
154 | filter = optarg; | |
155 | break; | |
156 | ||
157 | case 'd': | |
158 | device = optarg; | |
159 | break; | |
160 | ||
2001208c | 161 | case 's': |
59803c38 | 162 | subsystem = optarg; |
2001208c | 163 | break; |
a4bbef09 KS |
164 | |
165 | case 'p': | |
166 | prefix = optarg; | |
167 | break; | |
912541b0 KS |
168 | } |
169 | } | |
ccba91c7 | 170 | |
6824690f KS |
171 | /* query a specific key given as argument */ |
172 | if (argv[optind]) { | |
a4bbef09 | 173 | if (udev_builtin_hwdb_lookup(dev, prefix, argv[optind], filter, test) > 0) |
6824690f KS |
174 | return EXIT_SUCCESS; |
175 | return EXIT_FAILURE; | |
176 | } | |
177 | ||
67410e9f KS |
178 | /* read data from another device than the device we will store the data */ |
179 | if (device) { | |
180 | srcdev = udev_device_new_from_device_id(udev_device_get_udev(dev), device); | |
181 | if (!srcdev) | |
182 | return EXIT_FAILURE; | |
183 | } else | |
184 | srcdev = dev; | |
185 | ||
beef8df8 KS |
186 | if (udev_builtin_hwdb_search(dev, srcdev, subsystem, prefix, filter, test) > 0) |
187 | return EXIT_SUCCESS; | |
188 | return EXIT_FAILURE; | |
796b06c2 | 189 | } |
ccba91c7 | 190 | |
796b06c2 | 191 | /* called at udev startup and reload */ |
9ec6e95b | 192 | static int builtin_hwdb_init(struct udev *udev) { |
2001208c | 193 | if (hwdb) |
5b4d50ef | 194 | return 0; |
2001208c KS |
195 | hwdb = udev_hwdb_new(udev); |
196 | if (!hwdb) | |
197 | return -ENOMEM; | |
912541b0 | 198 | return 0; |
3cf5266b | 199 | } |
ccba91c7 | 200 | |
796b06c2 | 201 | /* called on udev shutdown and reload request */ |
9ec6e95b | 202 | static void builtin_hwdb_exit(struct udev *udev) { |
2001208c | 203 | hwdb = udev_hwdb_unref(hwdb); |
ccba91c7 | 204 | } |
3cf5266b | 205 | |
796b06c2 | 206 | /* called every couple of seconds during event activity; 'true' if config has changed */ |
9ec6e95b | 207 | static bool builtin_hwdb_validate(struct udev *udev) { |
2001208c | 208 | return udev_hwdb_validate(hwdb); |
796b06c2 | 209 | } |
3cf5266b | 210 | |
796b06c2 KS |
211 | const struct udev_builtin udev_builtin_hwdb = { |
212 | .name = "hwdb", | |
213 | .cmd = builtin_hwdb, | |
214 | .init = builtin_hwdb_init, | |
215 | .exit = builtin_hwdb_exit, | |
216 | .validate = builtin_hwdb_validate, | |
217 | .help = "hardware database", | |
3cf5266b | 218 | }; |