chiark / gitweb /
Also merge into the top-level Makefile.am the simpler extras.
[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 int scan_failed(struct udev_enumerate *udev_enumerate)
65 {
66         struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
67         struct udev_queue *udev_queue;
68         struct udev_list_entry *list_entry;
69
70         udev_queue = udev_queue_new(udev);
71         if (udev_queue == NULL)
72                 return -1;
73         udev_list_entry_foreach(list_entry, udev_queue_get_failed_list_entry(udev_queue))
74                 udev_enumerate_add_syspath(udev_enumerate, udev_list_entry_get_name(list_entry));
75         return 0;
76 }
77
78 static const char *keyval(const char *str, const char **val, char *buf, size_t size)
79 {
80         char *pos;
81
82         util_strscpy(buf, size,str);
83         pos = strchr(buf, '=');
84         if (pos != NULL) {
85                 pos[0] = 0;
86                 pos++;
87         }
88         *val = pos;
89         return buf;
90 }
91
92 int udevadm_trigger(struct udev *udev, int argc, char *argv[])
93 {
94         static const struct option options[] = {
95                 { "verbose", no_argument, NULL, 'v' },
96                 { "dry-run", no_argument, NULL, 'n' },
97                 { "type", required_argument, NULL, 't' },
98                 { "action", required_argument, NULL, 'c' },
99                 { "subsystem-match", required_argument, NULL, 's' },
100                 { "subsystem-nomatch", required_argument, NULL, 'S' },
101                 { "attr-match", required_argument, NULL, 'a' },
102                 { "attr-nomatch", required_argument, NULL, 'A' },
103                 { "property-match", required_argument, NULL, 'p' },
104                 { "sysname-match", required_argument, NULL, 'y' },
105                 { "help", no_argument, NULL, 'h' },
106                 {}
107         };
108         enum {
109                 TYPE_DEVICES,
110                 TYPE_SUBSYSTEMS,
111                 TYPE_FAILED,
112         } device_type = TYPE_DEVICES;
113         const char *action = "add";
114         struct udev_enumerate *udev_enumerate;
115         int rc = 0;
116
117         dbg(udev, "version %s\n", VERSION);
118         udev_enumerate = udev_enumerate_new(udev);
119         if (udev_enumerate == NULL) {
120                 rc = 1;
121                 goto exit;
122         }
123
124         while (1) {
125                 int option;
126                 const char *key;
127                 const char *val;
128                 char buf[UTIL_PATH_SIZE];
129
130                 option = getopt_long(argc, argv, "vnFo:t:hcp:s:S:a:A:y:", options, NULL);
131                 if (option == -1)
132                         break;
133
134                 switch (option) {
135                 case 'v':
136                         verbose = 1;
137                         break;
138                 case 'n':
139                         dry_run = 1;
140                         break;
141                 case 't':
142                         if (strcmp(optarg, "devices") == 0) {
143                                 device_type = TYPE_DEVICES;
144                         } else if (strcmp(optarg, "subsystems") == 0) {
145                                 device_type = TYPE_SUBSYSTEMS;
146                         } else if (strcmp(optarg, "failed") == 0) {
147                                 device_type = TYPE_FAILED;
148                         } else {
149                                 fprintf(stderr, "unknown type --type=%s\n", optarg);
150                                 err(udev, "unknown type --type=%s\n", optarg);
151                                 rc = 2;
152                                 goto exit;
153                         }
154                         break;
155                 case 'c':
156                         action = optarg;
157                         break;
158                 case 's':
159                         udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
160                         break;
161                 case 'S':
162                         udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
163                         break;
164                 case 'a':
165                         key = keyval(optarg, &val, buf, sizeof(buf));
166                         udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
167                         break;
168                 case 'A':
169                         key = keyval(optarg, &val, buf, sizeof(buf));
170                         udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
171                         break;
172                 case 'p':
173                         key = keyval(optarg, &val, buf, sizeof(buf));
174                         udev_enumerate_add_match_property(udev_enumerate, key, val);
175                         break;
176                 case 'y':
177                         udev_enumerate_add_match_sysname(udev_enumerate, optarg);
178                         break;
179                 case 'h':
180                         printf("Usage: udevadm trigger OPTIONS\n"
181                                "  --verbose                       print the list of devices while running\n"
182                                "  --dry-run                       do not actually trigger the events\n"
183                                "  --type=                         type of events to trigger\n"
184                                "      devices                       sys devices (default)\n"
185                                "      subsystems                    sys subsystems and drivers\n"
186                                "      failed                        trigger only the events which have been\n"
187                                "                                    marked as failed during a previous run\n"
188                                "  --action=<action>               event action value, default is \"add\"\n"
189                                "  --subsystem-match=<subsystem>   trigger devices from a matching subystem\n"
190                                "  --subsystem-nomatch=<subsystem> exclude devices from a matching subystem\n"
191                                "  --attr-match=<file[=<value>]>   trigger devices with a matching attribute\n"
192                                "  --attr-nomatch=<file[=<value>]> exclude devices with a matching attribute\n"
193                                "  --property-match=<key>=<value>  trigger devices with a matching property\n"
194                                "  --sysname-match=<name>          trigger devices with a matching name\n"
195                                "  --help\n\n");
196                         goto exit;
197                 default:
198                         goto exit;
199                 }
200         }
201
202         switch (device_type) {
203         case TYPE_FAILED:
204                 scan_failed(udev_enumerate);
205                 exec_list(udev_enumerate, action);
206                 goto exit;
207         case TYPE_SUBSYSTEMS:
208                 udev_enumerate_scan_subsystems(udev_enumerate);
209                 exec_list(udev_enumerate, action);
210                 goto exit;
211         case TYPE_DEVICES:
212                 udev_enumerate_scan_devices(udev_enumerate);
213                 exec_list(udev_enumerate, action);
214                 goto exit;
215         default:
216                 goto exit;
217         }
218 exit:
219         udev_enumerate_unref(udev_enumerate);
220         return rc;
221 }