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 enumerate_scan_failed(struct udev_enumerate *udev_enumerate)
  66 {
  67         struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
  68         char base[UTIL_PATH_SIZE];
  69         DIR *dir;
  70         struct dirent *dent;
  71
  72         util_strlcpy(base, udev_get_dev_path(udev), sizeof(base));
  73         util_strlcat(base, "/.udev/failed", sizeof(base));
  74
  75         dir = opendir(base);
  76         if (dir != NULL) {
  77                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
  78                         char syspath[UTIL_PATH_SIZE];
  79                         size_t start;
  80                         struct udev_device *device;
  81
  82                         if (dent->d_name[0] == '.')
  83                                 continue;
  84                         start = util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
  85                         util_strlcat(syspath, dent->d_name, sizeof(syspath));
  86                         util_path_decode(&syspath[start]);
  87                         device = udev_device_new_from_syspath(udev, syspath);
  88                         if (device == NULL)
  89                                 continue;
  90                         udev_enumerate_add_device(udev_enumerate, device);
  91                         udev_device_unref(device);
  92                 }
  93                 closedir(dir);
  94         }
  95         return 0;
  96 }
  97
  98 int udevadm_trigger(struct udev *udev, int argc, char *argv[])
  99 {
 100         static const struct option options[] = {
 101                 { "verbose", 0, NULL, 'v' },
 102                 { "dry-run", 0, NULL, 'n' },
 103                 { "type", 0, NULL, 't' },
 104                 { "retry-failed", 0, NULL, 'F' },
 105                 { "action", 1, NULL, 'c' },
 106                 { "subsystem-match", 1, NULL, 's' },
 107                 { "subsystem-nomatch", 1, NULL, 'S' },
 108                 { "attr-match", 1, NULL, 'a' },
 109                 { "attr-nomatch", 1, NULL, 'A' },
 110                 { "help", 0, NULL, 'h' },
 111                 {}
 112         };
 113         enum {
 114                 TYPE_DEVICES,
 115                 TYPE_SUBSYSTEMS,
 116                 TYPE_FAILED,
 117         } device_type = TYPE_DEVICES;
 118         const char *action = "add";
 119         struct udev_enumerate *udev_enumerate;
 120         int rc = 0;
 121
 122         dbg(udev, "version %s\n", VERSION);
 123         udev_enumerate = udev_enumerate_new(udev);
 124         if (udev_enumerate == NULL) {
 125                 rc = 1;
 126                 goto exit;
 127         }
 128
 129         while (1) {
 130                 int option;
 131                 char attr[UTIL_PATH_SIZE];
 132                 char *val;
 133
 134                 option = getopt_long(argc, argv, "vnFo:t:hce::s:S:a:A:", options, NULL);
 135                 if (option == -1)
 136                         break;
 137
 138                 switch (option) {
 139                 case 'v':
 140                         verbose = 1;
 141                         break;
 142                 case 'n':
 143                         dry_run = 1;
 144                         break;
 145                 case 't':
 146                         if (strcmp(optarg, "devices") == 0) {
 147                                 device_type = TYPE_DEVICES;
 148                         } else if (strcmp(optarg, "subsystems") == 0) {
 149                                 device_type = TYPE_SUBSYSTEMS;
 150                         } else if (strcmp(optarg, "failed") == 0) {
 151                                 device_type = TYPE_FAILED;
 152                         } else {
 153                                 fprintf(stderr, "unknown type --type=%s\n", optarg);
 154                                 err(udev, "unknown type --type=%s\n", optarg);
 155                                 rc = 2;
 156                                 goto exit;
 157                         }
 158                         break;
 159                 case 'F':
 160                         device_type = TYPE_FAILED;
 161                         break;
 162                 case 'c':
 163                         action = optarg;
 164                         break;
 165                 case 's':
 166                         udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
 167                         break;
 168                 case 'S':
 169                         udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
 170                         break;
 171                 case 'a':
 172                         util_strlcpy(attr, optarg, sizeof(attr));
 173                         val = strchr(attr, '=');
 174                         if (val != NULL) {
 175                                 val[0] = 0;
 176                                 val = &val[1];
 177                         }
 178                         udev_enumerate_add_match_attr(udev_enumerate, attr, val);
 179                         break;
 180                 case 'A':
 181                         util_strlcpy(attr, optarg, sizeof(attr));
 182                         val = strchr(attr, '=');
 183                         if (val != NULL) {
 184                                 val[0] = 0;
 185                                 val = &val[1];
 186                         }
 187                         udev_enumerate_add_nomatch_attr(udev_enumerate, attr, val);
 188                         break;
 189                 case 'h':
 190                         printf("Usage: udevadm trigger OPTIONS\n"
 191                                "  --verbose                       print the list of devices while running\n"
 192                                "  --dry-run                       do not actually trigger the events\n"
 193                                "  --type=                         type of events to trigger\n"
 194                                "      devices                       sys devices\n"
 195                                "      subsystems                    sys subsystems and drivers\n"
 196                                "      failed                        trigger only the events which have been\n"
 197                                "                                    marked as failed during a previous run\n"
 198                                "  --subsystem-match=<subsystem>   trigger devices from a matching subystem\n"
 199                                "  --subsystem-nomatch=<subsystem> exclude devices from a matching subystem\n"
 200                                "  --attr-match=<file[=<value>]>   trigger devices with a matching attribute\n"
 201                                "  --attr-nomatch=<file[=<value>]> exclude devices with a matching attribute\n"
 202                                "  --help                          print this text\n"
 203                                "\n");
 204                         goto exit;
 205                 default:
 206                         goto exit;
 207                 }
 208         }
 209
 210         switch (device_type) {
 211         case TYPE_FAILED:
 212                 enumerate_scan_failed(udev_enumerate);
 213                 exec_list(udev_enumerate, action);
 214                 goto exit;
 215         case TYPE_SUBSYSTEMS:
 216                 udev_enumerate_scan_subsystems(udev_enumerate);
 217                 exec_list(udev_enumerate, action);
 218                 goto exit;
 219         case TYPE_DEVICES:
 220                 udev_enumerate_scan_devices(udev_enumerate);
 221                 exec_list(udev_enumerate, action);
 222                 goto exit;
 223         default:
 224                 goto exit;
 225         }
 226 exit:
 227         udev_enumerate_unref(udev_enumerate);
 228         return rc;
 229 }