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keymap: Fix bluetooth key on Acer TravelMate 7720
[elogind.git] / udev / udevadm-trigger.c
1 /*
2  * Copyright (C) 2008-2009 Kay Sievers <kay.sievers@vrfy.org>
3  *
4  * This program is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation, either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
16  */
17
18 #include <stdlib.h>
19 #include <stddef.h>
20 #include <string.h>
21 #include <stdio.h>
22 #include <unistd.h>
23 #include <getopt.h>
24 #include <errno.h>
25 #include <dirent.h>
26 #include <fcntl.h>
27 #include <syslog.h>
28 #include <fnmatch.h>
29 #include <sys/stat.h>
30 #include <sys/types.h>
31 #include <sys/socket.h>
32 #include <sys/un.h>
33
34 #include "udev.h"
35
36 static int verbose;
37 static int dry_run;
38
39 static void exec_list(struct udev_enumerate *udev_enumerate, const char *action)
40 {
41         struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
42         struct udev_list_entry *entry;
43
44         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
45                 char filename[UTIL_PATH_SIZE];
46                 int fd;
47
48                 if (verbose)
49                         printf("%s\n", udev_list_entry_get_name(entry));
50                 if (dry_run)
51                         continue;
52                 util_strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
53                 fd = open(filename, O_WRONLY);
54                 if (fd < 0) {
55                         dbg(udev, "error on opening %s: %m\n", filename);
56                         continue;
57                 }
58                 if (write(fd, action, strlen(action)) < 0)
59                         info(udev, "error writing '%s' to '%s': %m\n", action, filename);
60                 close(fd);
61         }
62 }
63
64 static const char *keyval(const char *str, const char **val, char *buf, size_t size)
65 {
66         char *pos;
67
68         util_strscpy(buf, size,str);
69         pos = strchr(buf, '=');
70         if (pos != NULL) {
71                 pos[0] = 0;
72                 pos++;
73         }
74         *val = pos;
75         return buf;
76 }
77
78 static int adm_trigger(struct udev *udev, int argc, char *argv[])
79 {
80         static const struct option options[] = {
81                 { "verbose", no_argument, NULL, 'v' },
82                 { "dry-run", no_argument, NULL, 'n' },
83                 { "type", required_argument, NULL, 't' },
84                 { "action", required_argument, NULL, 'c' },
85                 { "subsystem-match", required_argument, NULL, 's' },
86                 { "subsystem-nomatch", required_argument, NULL, 'S' },
87                 { "attr-match", required_argument, NULL, 'a' },
88                 { "attr-nomatch", required_argument, NULL, 'A' },
89                 { "property-match", required_argument, NULL, 'p' },
90                 { "tag-match", required_argument, NULL, 'g' },
91                 { "sysname-match", required_argument, NULL, 'y' },
92                 { "parent-match", required_argument, NULL, 'b' },
93                 { "help", no_argument, NULL, 'h' },
94                 {}
95         };
96         enum {
97                 TYPE_DEVICES,
98                 TYPE_SUBSYSTEMS,
99         } device_type = TYPE_DEVICES;
100         const char *action = "change";
101         struct udev_enumerate *udev_enumerate;
102         int rc = 0;
103
104         dbg(udev, "version %s\n", VERSION);
105         udev_enumerate = udev_enumerate_new(udev);
106         if (udev_enumerate == NULL) {
107                 rc = 1;
108                 goto exit;
109         }
110
111         for (;;) {
112                 int option;
113                 const char *key;
114                 const char *val;
115                 char buf[UTIL_PATH_SIZE];
116
117                 option = getopt_long(argc, argv, "vng:o:t:hc:p:s:S:a:A:y:b:", options, NULL);
118                 if (option == -1)
119                         break;
120
121                 switch (option) {
122                 case 'v':
123                         verbose = 1;
124                         break;
125                 case 'n':
126                         dry_run = 1;
127                         break;
128                 case 't':
129                         if (strcmp(optarg, "devices") == 0) {
130                                 device_type = TYPE_DEVICES;
131                         } else if (strcmp(optarg, "subsystems") == 0) {
132                                 device_type = TYPE_SUBSYSTEMS;
133                         } else {
134                                 err(udev, "unknown type --type=%s\n", optarg);
135                                 rc = 2;
136                                 goto exit;
137                         }
138                         break;
139                 case 'c':
140                         action = optarg;
141                         break;
142                 case 's':
143                         udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
144                         break;
145                 case 'S':
146                         udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
147                         break;
148                 case 'a':
149                         key = keyval(optarg, &val, buf, sizeof(buf));
150                         udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
151                         break;
152                 case 'A':
153                         key = keyval(optarg, &val, buf, sizeof(buf));
154                         udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
155                         break;
156                 case 'p':
157                         key = keyval(optarg, &val, buf, sizeof(buf));
158                         udev_enumerate_add_match_property(udev_enumerate, key, val);
159                         break;
160                 case 'g':
161                         udev_enumerate_add_match_tag(udev_enumerate, optarg);
162                         break;
163                 case 'y':
164                         udev_enumerate_add_match_sysname(udev_enumerate, optarg);
165                         break;
166                 case 'b': {
167                         char path[UTIL_PATH_SIZE];
168                         struct udev_device *dev;
169
170                         /* add sys dir if needed */
171                         if (strncmp(optarg, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0)
172                                 util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), optarg, NULL);
173                         else
174                                 util_strscpy(path, sizeof(path), optarg);
175                         util_remove_trailing_chars(path, '/');
176                         dev = udev_device_new_from_syspath(udev, path);
177                         if (dev == NULL) {
178                                 err(udev, "unable to open the device '%s'\n", optarg);
179                                 rc = 2;
180                                 goto exit;
181                         }
182                         udev_enumerate_add_match_parent(udev_enumerate, dev);
183                         /* drop reference immediately, enumerate pins the device as long as needed */
184                         udev_device_unref(dev);
185                         break;
186                 }
187                 case 'h':
188                         printf("Usage: udevadm trigger OPTIONS\n"
189                                "  --verbose                       print the list of devices while running\n"
190                                "  --dry-run                       do not actually trigger the events\n"
191                                "  --type=                         type of events to trigger\n"
192                                "      devices                       sys devices (default)\n"
193                                "      subsystems                    sys subsystems and drivers\n"
194                                "  --action=<action>               event action value, default is \"change\"\n"
195                                "  --subsystem-match=<subsystem>   trigger devices from a matching subsystem\n"
196                                "  --subsystem-nomatch=<subsystem> exclude devices from a matching subsystem\n"
197                                "  --attr-match=<file[=<value>]>   trigger devices with a matching attribute\n"
198                                "  --attr-nomatch=<file[=<value>]> exclude devices with a matching attribute\n"
199                                "  --property-match=<key>=<value>  trigger devices with a matching property\n"
200                                "  --tag-match=<key>=<value>       trigger devices with a matching property\n"
201                                "  --sysname-match=<name>          trigger devices with a matching name\n"
202                                "  --parent-match=<name>           trigger devices with that parent device\n"
203                                "  --help\n\n");
204                         goto exit;
205                 default:
206                         rc = 1;
207                         goto exit;
208                 }
209         }
210
211         switch (device_type) {
212         case TYPE_SUBSYSTEMS:
213                 udev_enumerate_scan_subsystems(udev_enumerate);
214                 exec_list(udev_enumerate, action);
215                 goto exit;
216         case TYPE_DEVICES:
217                 udev_enumerate_scan_devices(udev_enumerate);
218                 exec_list(udev_enumerate, action);
219                 goto exit;
220         default:
221                 goto exit;
222         }
223 exit:
224         udev_enumerate_unref(udev_enumerate);
225         return rc;
226 }
227
228 const struct udevadm_cmd udevadm_trigger = {
229         .name = "trigger",
230         .cmd = adm_trigger,
231         .help = "request events from the kernel",
232 };