udev/udevadm-trigger.c

   1 /*
   2  * Copyright (C) 2008 Kay Sievers <kayi.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_strlcpy(filename, udev_list_entry_get_name(entry), sizeof(filename));
  53                 util_strlcat(filename, "/uevent", sizeof(filename));
  54                 fd = open(filename, O_WRONLY);
  55                 if (fd < 0) {
  56                         dbg(udev, "error on opening %s: %m\n", filename);
  57                         continue;
  58                 }
  59                 if (write(fd, action, strlen(action)) < 0)
  60                         info(udev, "error writing '%s' to '%s': %m\n", action, filename);
  61                 close(fd);
  62         }
  63 }
  64
  65 static int scan_failed(struct udev_enumerate *udev_enumerate)
  66 {
  67         struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
  68         struct udev_queue *udev_queue;
  69         struct udev_list_entry *list_entry;
  70
  71         udev_queue = udev_queue_new(udev);
  72         if (udev_queue == NULL)
  73                 return -1;
  74         udev_list_entry_foreach(list_entry, udev_queue_get_failed_list_entry(udev_queue))
  75                 udev_enumerate_add_syspath(udev_enumerate, udev_list_entry_get_name(list_entry));
  76         return 0;
  77 }
  78
  79 int udevadm_trigger(struct udev *udev, int argc, char *argv[])
  80 {
  81         static const struct option options[] = {
  82                 { "verbose", no_argument, NULL, 'v' },
  83                 { "dry-run", no_argument, NULL, 'n' },
  84                 { "type", required_argument, NULL, 't' },
  85                 { "retry-failed", no_argument, NULL, 'F' },
  86                 { "action", required_argument, NULL, 'c' },
  87                 { "subsystem-match", required_argument, NULL, 's' },
  88                 { "subsystem-nomatch", required_argument, NULL, 'S' },
  89                 { "attr-match", required_argument, NULL, 'a' },
  90                 { "attr-nomatch", required_argument, NULL, 'A' },
  91                 { "help", no_argument, NULL, 'h' },
  92                 {}
  93         };
  94         enum {
  95                 TYPE_DEVICES,
  96                 TYPE_SUBSYSTEMS,
  97                 TYPE_FAILED,
  98         } device_type = TYPE_DEVICES;
  99         const char *action = "add";
 100         struct udev_enumerate *udev_enumerate;
 101         int rc = 0;
 102
 103         dbg(udev, "version %s\n", VERSION);
 104         udev_enumerate = udev_enumerate_new(udev);
 105         if (udev_enumerate == NULL) {
 106                 rc = 1;
 107                 goto exit;
 108         }
 109
 110         while (1) {
 111                 int option;
 112                 char attr[UTIL_PATH_SIZE];
 113                 char *val;
 114
 115                 option = getopt_long(argc, argv, "vnFo:t:hce::s:S:a:A:", options, NULL);
 116                 if (option == -1)
 117                         break;
 118
 119                 switch (option) {
 120                 case 'v':
 121                         verbose = 1;
 122                         break;
 123                 case 'n':
 124                         dry_run = 1;
 125                         break;
 126                 case 't':
 127                         if (strcmp(optarg, "devices") == 0) {
 128                                 device_type = TYPE_DEVICES;
 129                         } else if (strcmp(optarg, "subsystems") == 0) {
 130                                 device_type = TYPE_SUBSYSTEMS;
 131                         } else if (strcmp(optarg, "failed") == 0) {
 132                                 device_type = TYPE_FAILED;
 133                         } else {
 134                                 fprintf(stderr, "unknown type --type=%s\n", optarg);
 135                                 err(udev, "unknown type --type=%s\n", optarg);
 136                                 rc = 2;
 137                                 goto exit;
 138                         }
 139                         break;
 140                 case 'F':
 141                         device_type = TYPE_FAILED;
 142                         break;
 143                 case 'c':
 144                         action = optarg;
 145                         break;
 146                 case 's':
 147                         udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
 148                         break;
 149                 case 'S':
 150                         udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
 151                         break;
 152                 case 'a':
 153                         util_strlcpy(attr, optarg, sizeof(attr));
 154                         val = strchr(attr, '=');
 155                         if (val != NULL) {
 156                                 val[0] = 0;
 157                                 val = &val[1];
 158                         }
 159                         udev_enumerate_add_match_sysattr(udev_enumerate, attr, val);
 160                         break;
 161                 case 'A':
 162                         util_strlcpy(attr, optarg, sizeof(attr));
 163                         val = strchr(attr, '=');
 164                         if (val != NULL) {
 165                                 val[0] = 0;
 166                                 val = &val[1];
 167                         }
 168                         udev_enumerate_add_nomatch_sysattr(udev_enumerate, attr, val);
 169                         break;
 170                 case 'h':
 171                         printf("Usage: udevadm trigger OPTIONS\n"
 172                                "  --verbose                       print the list of devices while running\n"
 173                                "  --dry-run                       do not actually trigger the events\n"
 174                                "  --type=                         type of events to trigger\n"
 175                                "      devices                       sys devices\n"
 176                                "      subsystems                    sys subsystems and drivers\n"
 177                                "      failed                        trigger only the events which have been\n"
 178                                "                                    marked as failed during a previous run\n"
 179                                "  --subsystem-match=<subsystem>   trigger devices from a matching subystem\n"
 180                                "  --subsystem-nomatch=<subsystem> exclude devices from a matching subystem\n"
 181                                "  --attr-match=<file[=<value>]>   trigger devices with a matching attribute\n"
 182                                "  --attr-nomatch=<file[=<value>]> exclude devices with a matching attribute\n"
 183                                "  --help                          print this text\n"
 184                                "\n");
 185                         goto exit;
 186                 default:
 187                         goto exit;
 188                 }
 189         }
 190
 191         switch (device_type) {
 192         case TYPE_FAILED:
 193                 scan_failed(udev_enumerate);
 194                 exec_list(udev_enumerate, action);
 195                 goto exit;
 196         case TYPE_SUBSYSTEMS:
 197                 udev_enumerate_scan_subsystems(udev_enumerate);
 198                 exec_list(udev_enumerate, action);
 199                 goto exit;
 200         case TYPE_DEVICES:
 201                 udev_enumerate_scan_devices(udev_enumerate);
 202                 exec_list(udev_enumerate, action);
 203                 goto exit;
 204         default:
 205                 goto exit;
 206         }
 207 exit:
 208         udev_enumerate_unref(udev_enumerate);
 209         return rc;
 210 }