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_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 int udevadm_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                 { "retry-failed", no_argument, NULL, 'F' },
  85                 { "action", required_argument, NULL, 'c' },
  86                 { "subsystem-match", required_argument, NULL, 's' },
  87                 { "subsystem-nomatch", required_argument, NULL, 'S' },
  88                 { "attr-match", required_argument, NULL, 'a' },
  89                 { "attr-nomatch", required_argument, NULL, 'A' },
  90                 { "help", no_argument, NULL, 'h' },
  91                 {}
  92         };
  93         enum {
  94                 TYPE_DEVICES,
  95                 TYPE_SUBSYSTEMS,
  96                 TYPE_FAILED,
  97         } device_type = TYPE_DEVICES;
  98         const char *action = "add";
  99         struct udev_enumerate *udev_enumerate;
 100         int rc = 0;
 101
 102         dbg(udev, "version %s\n", VERSION);
 103         udev_enumerate = udev_enumerate_new(udev);
 104         if (udev_enumerate == NULL) {
 105                 rc = 1;
 106                 goto exit;
 107         }
 108
 109         while (1) {
 110                 int option;
 111                 char attr[UTIL_PATH_SIZE];
 112                 char *val;
 113
 114                 option = getopt_long(argc, argv, "vnFo:t:hce::s:S:a:A:", options, NULL);
 115                 if (option == -1)
 116                         break;
 117
 118                 switch (option) {
 119                 case 'v':
 120                         verbose = 1;
 121                         break;
 122                 case 'n':
 123                         dry_run = 1;
 124                         break;
 125                 case 't':
 126                         if (strcmp(optarg, "devices") == 0) {
 127                                 device_type = TYPE_DEVICES;
 128                         } else if (strcmp(optarg, "subsystems") == 0) {
 129                                 device_type = TYPE_SUBSYSTEMS;
 130                         } else if (strcmp(optarg, "failed") == 0) {
 131                                 device_type = TYPE_FAILED;
 132                         } else {
 133                                 fprintf(stderr, "unknown type --type=%s\n", optarg);
 134                                 err(udev, "unknown type --type=%s\n", optarg);
 135                                 rc = 2;
 136                                 goto exit;
 137                         }
 138                         break;
 139                 case 'F':
 140                         device_type = TYPE_FAILED;
 141                         break;
 142                 case 'c':
 143                         action = optarg;
 144                         break;
 145                 case 's':
 146                         udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
 147                         break;
 148                 case 'S':
 149                         udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
 150                         break;
 151                 case 'a':
 152                         util_strscpy(attr, sizeof(attr), optarg);
 153                         val = strchr(attr, '=');
 154                         if (val != NULL) {
 155                                 val[0] = 0;
 156                                 val = &val[1];
 157                         }
 158                         udev_enumerate_add_match_sysattr(udev_enumerate, attr, val);
 159                         break;
 160                 case 'A':
 161                         util_strscpy(attr, sizeof(attr), optarg);
 162                         val = strchr(attr, '=');
 163                         if (val != NULL) {
 164                                 val[0] = 0;
 165                                 val = &val[1];
 166                         }
 167                         udev_enumerate_add_nomatch_sysattr(udev_enumerate, attr, val);
 168                         break;
 169                 case 'h':
 170                         printf("Usage: udevadm trigger OPTIONS\n"
 171                                "  --verbose                       print the list of devices while running\n"
 172                                "  --dry-run                       do not actually trigger the events\n"
 173                                "  --type=                         type of events to trigger\n"
 174                                "      devices                       sys devices (default)\n"
 175                                "      subsystems                    sys subsystems and drivers\n"
 176                                "      failed                        trigger only the events which have been\n"
 177                                "                                    marked as failed during a previous run\n"
 178                                "  --action=<action>               event action value, default is \"add\"\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\n\n");
 184                         goto exit;
 185                 default:
 186                         goto exit;
 187                 }
 188         }
 189
 190         switch (device_type) {
 191         case TYPE_FAILED:
 192                 scan_failed(udev_enumerate);
 193                 exec_list(udev_enumerate, action);
 194                 goto exit;
 195         case TYPE_SUBSYSTEMS:
 196                 udev_enumerate_scan_subsystems(udev_enumerate);
 197                 exec_list(udev_enumerate, action);
 198                 goto exit;
 199         case TYPE_DEVICES:
 200                 udev_enumerate_scan_devices(udev_enumerate);
 201                 exec_list(udev_enumerate, action);
 202                 goto exit;
 203         default:
 204                 goto exit;
 205         }
 206 exit:
 207         udev_enumerate_unref(udev_enumerate);
 208         return rc;
 209 }