udev/udev-event.c

   1 /*
   2  * Copyright (C) 2004-2008 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 <stdio.h>
  20 #include <stddef.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <errno.h>
  24 #include <ctype.h>
  25 #include <string.h>
  26 #include <sys/ioctl.h>
  27 #include <sys/socket.h>
  28 #include <net/if.h>
  29 #include <linux/sockios.h>
  30
  31 #include "udev.h"
  32
  33 struct udev_event *udev_event_new(struct udev_device *dev)
  34 {
  35         struct udev_event *event;
  36
  37         event = calloc(1, sizeof(struct udev_event));
  38         if (event == NULL)
  39                 return NULL;
  40         event->dev = dev;
  41         event->udev = udev_device_get_udev(dev);
  42         udev_list_init(&event->run_list);
  43         event->mode = 0660;
  44         dbg(event->udev, "allocated event %p\n", event);
  45         return event;
  46 }
  47
  48 void udev_event_unref(struct udev_event *event)
  49 {
  50         udev_list_cleanup_entries(event->udev, &event->run_list);
  51         dbg(event->udev, "free event %p\n", event);
  52         free(event);
  53 }
  54
  55 /* extract possible {attr} and move str behind it */
  56 static char *get_format_attribute(struct udev *udev, char **str)
  57 {
  58         char *pos;
  59         char *attr = NULL;
  60
  61         if (*str[0] == '{') {
  62                 pos = strchr(*str, '}');
  63                 if (pos == NULL) {
  64                         err(udev, "missing closing brace for format\n");
  65                         return NULL;
  66                 }
  67                 pos[0] = '\0';
  68                 attr = *str+1;
  69                 *str = pos+1;
  70                 dbg(udev, "attribute='%s', str='%s'\n", attr, *str);
  71         }
  72         return attr;
  73 }
  74
  75 /* extract possible format length and move str behind it*/
  76 static int get_format_len(struct udev *udev, char **str)
  77 {
  78         int num;
  79         char *tail;
  80
  81         if (isdigit(*str[0])) {
  82                 num = (int) strtoul(*str, &tail, 10);
  83                 if (num > 0) {
  84                         *str = tail;
  85                         dbg(udev, "format length=%i\n", num);
  86                         return num;
  87                 } else {
  88                         err(udev, "format parsing error '%s'\n", *str);
  89                 }
  90         }
  91         return -1;
  92 }
  93
  94 void udev_event_apply_format(struct udev_event *event, char *string, size_t maxsize)
  95 {
  96         struct udev_device *dev = event->dev;
  97         char temp[UTIL_PATH_SIZE];
  98         char temp2[UTIL_PATH_SIZE];
  99         char *head, *tail, *cpos, *attr, *rest;
 100         int len;
 101         int i;
 102         int count;
 103         enum subst_type {
 104                 SUBST_UNKNOWN,
 105                 SUBST_DEVPATH,
 106                 SUBST_KERNEL,
 107                 SUBST_KERNEL_NUMBER,
 108                 SUBST_ID,
 109                 SUBST_DRIVER,
 110                 SUBST_MAJOR,
 111                 SUBST_MINOR,
 112                 SUBST_RESULT,
 113                 SUBST_ATTR,
 114                 SUBST_PARENT,
 115                 SUBST_TEMP_NODE,
 116                 SUBST_NAME,
 117                 SUBST_LINKS,
 118                 SUBST_ROOT,
 119                 SUBST_SYS,
 120                 SUBST_ENV,
 121         };
 122         static const struct subst_map {
 123                 char *name;
 124                 char fmt;
 125                 enum subst_type type;
 126         } map[] = {
 127                 { .name = "devpath",    .fmt = 'p',     .type = SUBST_DEVPATH },
 128                 { .name = "number",     .fmt = 'n',     .type = SUBST_KERNEL_NUMBER },
 129                 { .name = "kernel",     .fmt = 'k',     .type = SUBST_KERNEL },
 130                 { .name = "id",         .fmt = 'b',     .type = SUBST_ID },
 131                 { .name = "driver",     .fmt = 'd',     .type = SUBST_DRIVER },
 132                 { .name = "major",      .fmt = 'M',     .type = SUBST_MAJOR },
 133                 { .name = "minor",      .fmt = 'm',     .type = SUBST_MINOR },
 134                 { .name = "result",     .fmt = 'c',     .type = SUBST_RESULT },
 135                 { .name = "attr",       .fmt = 's',     .type = SUBST_ATTR },
 136                 { .name = "sysfs",      .fmt = 's',     .type = SUBST_ATTR },
 137                 { .name = "parent",     .fmt = 'P',     .type = SUBST_PARENT },
 138                 { .name = "tempnode",   .fmt = 'N',     .type = SUBST_TEMP_NODE },
 139                 { .name = "name",       .fmt = 'D',     .type = SUBST_NAME },
 140                 { .name = "links",      .fmt = 'L',     .type = SUBST_LINKS },
 141                 { .name = "root",       .fmt = 'r',     .type = SUBST_ROOT },
 142                 { .name = "sys",        .fmt = 'S',     .type = SUBST_SYS },
 143                 { .name = "env",        .fmt = 'E',     .type = SUBST_ENV },
 144                 { NULL, '\0', 0 }
 145         };
 146         enum subst_type type;
 147         const struct subst_map *subst;
 148
 149         head = string;
 150         while (1) {
 151                 len = -1;
 152                 while (head[0] != '\0') {
 153                         if (head[0] == '$') {
 154                                 /* substitute named variable */
 155                                 if (head[1] == '\0')
 156                                         break;
 157                                 if (head[1] == '$') {
 158                                         util_strlcpy(temp, head+2, sizeof(temp));
 159                                         util_strlcpy(head+1, temp, maxsize);
 160                                         head++;
 161                                         continue;
 162                                 }
 163                                 head[0] = '\0';
 164                                 for (subst = map; subst->name; subst++) {
 165                                         if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
 166                                                 type = subst->type;
 167                                                 tail = head + strlen(subst->name)+1;
 168                                                 dbg(event->udev, "will substitute format name '%s'\n", subst->name);
 169                                                 goto found;
 170                                         }
 171                                 }
 172                                 head[0] = '$';
 173                                 err(event->udev, "unknown format variable '%s'\n", head);
 174                         } else if (head[0] == '%') {
 175                                 /* substitute format char */
 176                                 if (head[1] == '\0')
 177                                         break;
 178                                 if (head[1] == '%') {
 179                                         util_strlcpy(temp, head+2, sizeof(temp));
 180                                         util_strlcpy(head+1, temp, maxsize);
 181                                         head++;
 182                                         continue;
 183                                 }
 184                                 head[0] = '\0';
 185                                 tail = head+1;
 186                                 len = get_format_len(event->udev, &tail);
 187                                 for (subst = map; subst->name; subst++) {
 188                                         if (tail[0] == subst->fmt) {
 189                                                 type = subst->type;
 190                                                 tail++;
 191                                                 dbg(event->udev, "will substitute format char '%c'\n", subst->fmt);
 192                                                 goto found;
 193                                         }
 194                                 }
 195                                 head[0] = '%';
 196                                 err(event->udev, "unknown format char '%c'\n", tail[0]);
 197                         }
 198                         head++;
 199                 }
 200                 break;
 201 found:
 202                 attr = get_format_attribute(event->udev, &tail);
 203                 util_strlcpy(temp, tail, sizeof(temp));
 204                 dbg(event->udev, "format=%i, string='%s', tail='%s'\n", type ,string, tail);
 205
 206                 switch (type) {
 207                 case SUBST_DEVPATH:
 208                         util_strlcat(string, udev_device_get_devpath(dev), maxsize);
 209                         dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
 210                         break;
 211                 case SUBST_KERNEL:
 212                         util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 213                         dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
 214                         break;
 215                 case SUBST_KERNEL_NUMBER:
 216                         if (udev_device_get_sysnum(dev) == NULL)
 217                                 break;
 218                         util_strlcat(string, udev_device_get_sysnum(dev), maxsize);
 219                         dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
 220                         break;
 221                 case SUBST_ID:
 222                         if (event->dev_parent != NULL) {
 223                                 util_strlcat(string, udev_device_get_sysname(event->dev_parent), maxsize);
 224                                 dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
 225                         }
 226                         break;
 227                 case SUBST_DRIVER:
 228                         if (event->dev_parent != NULL) {
 229                                 const char *driver = udev_device_get_driver(event->dev_parent);
 230
 231                                 if (driver == NULL)
 232                                         break;
 233                                 util_strlcat(string, driver, maxsize);
 234                                 dbg(event->udev, "substitute driver '%s'\n", driver);
 235                         }
 236                         break;
 237                 case SUBST_MAJOR:
 238                         sprintf(temp2, "%d", major(udev_device_get_devnum(dev)));
 239                         util_strlcat(string, temp2, maxsize);
 240                         dbg(event->udev, "substitute major number '%s'\n", temp2);
 241                         break;
 242                 case SUBST_MINOR:
 243                         sprintf(temp2, "%d", minor(udev_device_get_devnum(dev)));
 244                         util_strlcat(string, temp2, maxsize);
 245                         dbg(event->udev, "substitute minor number '%s'\n", temp2);
 246                         break;
 247                 case SUBST_RESULT:
 248                         if (event->program_result[0] == '\0')
 249                                 break;
 250                         /* get part part of the result string */
 251                         i = 0;
 252                         if (attr != NULL)
 253                                 i = strtoul(attr, &rest, 10);
 254                         if (i > 0) {
 255                                 dbg(event->udev, "request part #%d of result string\n", i);
 256                                 cpos = event->program_result;
 257                                 while (--i) {
 258                                         while (cpos[0] != '\0' && !isspace(cpos[0]))
 259                                                 cpos++;
 260                                         while (isspace(cpos[0]))
 261                                                 cpos++;
 262                                 }
 263                                 if (i > 0) {
 264                                         err(event->udev, "requested part of result string not found\n");
 265                                         break;
 266                                 }
 267                                 util_strlcpy(temp2, cpos, sizeof(temp2));
 268                                 /* %{2+}c copies the whole string from the second part on */
 269                                 if (rest[0] != '+') {
 270                                         cpos = strchr(temp2, ' ');
 271                                         if (cpos)
 272                                                 cpos[0] = '\0';
 273                                 }
 274                                 util_strlcat(string, temp2, maxsize);
 275                                 dbg(event->udev, "substitute part of result string '%s'\n", temp2);
 276                         } else {
 277                                 util_strlcat(string, event->program_result, maxsize);
 278                                 dbg(event->udev, "substitute result string '%s'\n", event->program_result);
 279                         }
 280                         break;
 281                 case SUBST_ATTR:
 282                         if (attr == NULL)
 283                                 err(event->udev, "missing file parameter for attr\n");
 284                         else {
 285                                 const char *val;
 286                                 char value[UTIL_NAME_SIZE] = "";
 287                                 size_t size;
 288
 289                                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
 290
 291                                 val = udev_device_get_sysattr_value(event->dev, attr);
 292                                 if (val != NULL)
 293                                         util_strlcpy(value, val, sizeof(value));
 294
 295                                 /* try the current device, other matches may have selected */
 296                                 if (value[0] == '\0' && event->dev_parent != NULL && event->dev_parent != event->dev) {
 297                                         val = udev_device_get_sysattr_value(event->dev_parent, attr);
 298                                         if (val != NULL)
 299                                                 util_strlcpy(value, val, sizeof(value));
 300                                 }
 301
 302                                 if (value[0]=='\0')
 303                                         break;
 304
 305                                 /* strip trailing whitespace, and replace unwanted characters */
 306                                 size = strlen(value);
 307                                 while (size > 0 && isspace(value[--size]))
 308                                         value[size] = '\0';
 309                                 count = util_replace_chars(value, ALLOWED_CHARS_INPUT);
 310                                 if (count > 0)
 311                                         info(event->udev, "%i character(s) replaced\n" , count);
 312                                 util_strlcat(string, value, maxsize);
 313                                 dbg(event->udev, "substitute sysfs value '%s'\n", value);
 314                         }
 315                         break;
 316                 case SUBST_PARENT:
 317                         {
 318                                 struct udev_device *dev_parent;
 319                                 const char *devnode;
 320
 321                                 dev_parent = udev_device_get_parent(event->dev);
 322                                 if (dev_parent == NULL)
 323                                         break;
 324                                 devnode = udev_device_get_devnode(dev_parent);
 325                                 if (devnode != NULL) {
 326                                         size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
 327
 328                                         util_strlcat(string, &devnode[devlen], maxsize);
 329                                         dbg(event->udev, "found parent '%s', got node name '%s'\n",
 330                                             udev_device_get_syspath(dev_parent), &devnode[devlen]);
 331                                 }
 332                         }
 333                         break;
 334                 case SUBST_TEMP_NODE:
 335                         if (event->tmp_node[0] == '\0' && major(udev_device_get_devnum(dev)) > 0) {
 336                                 dbg(event->udev, "create temporary device node for callout\n");
 337                                 snprintf(event->tmp_node, sizeof(event->tmp_node), "%s/.tmp-%u-%u",
 338                                          udev_get_dev_path(event->udev),
 339                                          major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)));
 340                                 udev_node_mknod(dev, event->tmp_node, makedev(0,0), 0600, 0, 0);
 341                         }
 342                         util_strlcat(string, event->tmp_node, maxsize);
 343                         dbg(event->udev, "substitute temporary device node name '%s'\n", event->tmp_node);
 344                         break;
 345                 case SUBST_NAME:
 346                         if (event->name != NULL) {
 347                                 util_strlcat(string, event->name, maxsize);
 348                                 dbg(event->udev, "substitute name '%s'\n", event->name);
 349                         } else {
 350                                 util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 351                                 dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
 352                         }
 353                         break;
 354                 case SUBST_LINKS:
 355                         {
 356                                 struct udev_list_entry *list_entry;
 357
 358                                 list_entry = udev_device_get_properties_list_entry(dev);
 359                                 util_strlcpy(string, udev_list_entry_get_name(list_entry), maxsize);
 360                                 udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
 361                                         util_strlcat(string, " ", maxsize);
 362                                         util_strlcat(string, udev_list_entry_get_name(list_entry), maxsize);
 363                                 }
 364                         }
 365                         break;
 366                 case SUBST_ROOT:
 367                         util_strlcat(string, udev_get_dev_path(event->udev), maxsize);
 368                         dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
 369                         break;
 370                 case SUBST_SYS:
 371                         util_strlcat(string, udev_get_sys_path(event->udev), maxsize);
 372                         dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
 373                         break;
 374                 case SUBST_ENV:
 375                         if (attr == NULL) {
 376                                 dbg(event->udev, "missing attribute\n");
 377                                 break;
 378                         } else {
 379                                 struct udev_list_entry *list_entry;
 380                                 const char *value;
 381
 382                                 list_entry = udev_device_get_properties_list_entry(event->dev);
 383                                 list_entry = udev_list_entry_get_by_name(list_entry, attr);
 384                                 if (list_entry == NULL)
 385                                         break;
 386                                 value = udev_list_entry_get_value(list_entry);
 387                                 dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
 388                                 util_strlcat(string, value, maxsize);
 389                                 break;
 390                         }
 391                 default:
 392                         err(event->udev, "unknown substitution type=%i\n", type);
 393                         break;
 394                 }
 395                 /* possibly truncate to format-char specified length */
 396                 if (len >= 0 && len < (int)strlen(head)) {
 397                         head[len] = '\0';
 398                         dbg(event->udev, "truncate to %i chars, subtitution string becomes '%s'\n", len, head);
 399                 }
 400                 util_strlcat(string, temp, maxsize);
 401         }
 402 }
 403
 404 static void rename_netif_kernel_log(struct ifreq ifr)
 405 {
 406         int klog;
 407         FILE *f;
 408
 409         klog = open("/dev/kmsg", O_WRONLY);
 410         if (klog < 0)
 411                 return;
 412
 413         f = fdopen(klog, "w");
 414         if (f == NULL) {
 415                 close(klog);
 416                 return;
 417         }
 418
 419         fprintf(f, "<6>udev: renamed network interface %s to %s\n",
 420                 ifr.ifr_name, ifr.ifr_newname);
 421         fclose(f);
 422 }
 423
 424 static int rename_netif(struct udev_event *event)
 425 {
 426         struct udev_device *dev = event->dev;
 427         int sk;
 428         struct ifreq ifr;
 429         int err;
 430
 431         info(event->udev, "changing net interface name from '%s' to '%s'\n",
 432              udev_device_get_sysname(dev), event->name);
 433         if (event->test)
 434                 return 0;
 435
 436         sk = socket(PF_INET, SOCK_DGRAM, 0);
 437         if (sk < 0) {
 438                 err(event->udev, "error opening socket: %m\n");
 439                 return -1;
 440         }
 441
 442         memset(&ifr, 0x00, sizeof(struct ifreq));
 443         util_strlcpy(ifr.ifr_name, udev_device_get_sysname(dev), IFNAMSIZ);
 444         util_strlcpy(ifr.ifr_newname, event->name, IFNAMSIZ);
 445         err = ioctl(sk, SIOCSIFNAME, &ifr);
 446         if (err == 0)
 447                 rename_netif_kernel_log(ifr);
 448         else {
 449                 int loop;
 450
 451                 /* see if the destination interface name already exists */
 452                 if (errno != EEXIST) {
 453                         err(event->udev, "error changing netif name %s to %s: %m\n",
 454                             ifr.ifr_name, ifr.ifr_newname);
 455                         goto exit;
 456                 }
 457
 458                 /* free our own name, another process may wait for us */
 459                 util_strlcpy(ifr.ifr_newname, udev_device_get_sysname(dev), IFNAMSIZ);
 460                 util_strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
 461                 err = ioctl(sk, SIOCSIFNAME, &ifr);
 462                 if (err != 0) {
 463                         err(event->udev, "error changing netif name %s to %s: %m\n",
 464                             ifr.ifr_name, ifr.ifr_newname);
 465                         goto exit;
 466                 }
 467
 468                 /* wait 30 seconds for our target to become available */
 469                 util_strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
 470                 util_strlcpy(ifr.ifr_newname, udev_device_get_devnode(dev), IFNAMSIZ);
 471                 loop = 30 * 20;
 472                 while (loop--) {
 473                         err = ioctl(sk, SIOCSIFNAME, &ifr);
 474                         if (err == 0) {
 475                                 rename_netif_kernel_log(ifr);
 476                                 break;
 477                         }
 478
 479                         if (errno != EEXIST) {
 480                                 err(event->udev, "error changing net interface name %s to %s: %m\n",
 481                                     ifr.ifr_name, ifr.ifr_newname);
 482                                 break;
 483                         }
 484                         dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
 485                             udev_device_get_devnode(dev), (30 * 20) - loop);
 486                         usleep(1000 * 1000 / 20);
 487                 }
 488         }
 489 exit:
 490         close(sk);
 491         return err;
 492 }
 493
 494 int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules)
 495 {
 496         struct udev_device *dev = event->dev;
 497         int err = 0;
 498
 499         if (udev_device_get_devpath_old(dev) != NULL) {
 500                 if (udev_device_rename_db(dev, udev_device_get_devpath(dev)) == 0)
 501                         info(event->udev, "moved database from '%s' to '%s'\n",
 502                              udev_device_get_devpath_old(dev), udev_device_get_devpath(dev));
 503         }
 504
 505         /* add device node */
 506         if (major(udev_device_get_devnum(dev)) != 0 &&
 507             (strcmp(udev_device_get_action(dev), "add") == 0 || strcmp(udev_device_get_action(dev), "change") == 0)) {
 508                 char filename[UTIL_PATH_SIZE];
 509                 struct udev_device *dev_old;
 510
 511                 dbg(event->udev, "device node add '%s'\n", udev_device_get_devpath(dev));
 512
 513                 udev_rules_apply_to_event(rules, event);
 514                 if (event->tmp_node[0] != '\0') {
 515                         dbg(event->udev, "removing temporary device node\n");
 516                         util_unlink_secure(event->udev, event->tmp_node);
 517                         event->tmp_node[0] = '\0';
 518                 }
 519
 520                 if (event->ignore_device) {
 521                         info(event->udev, "device event will be ignored\n");
 522                         goto exit;
 523                 }
 524
 525                 if (event->name_ignore) {
 526                         info(event->udev, "device node creation supressed\n");
 527                         goto exit;
 528                 }
 529
 530                 if (event->name[0] == '\0') {
 531                         info(event->udev, "no node name set, will use kernel name '%s'\n",
 532                              udev_device_get_sysname(event->dev));
 533                         util_strlcpy(event->name, udev_device_get_sysname(event->dev), sizeof(event->name));
 534                 }
 535
 536                 /* set device node name */
 537                 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
 538                 util_strlcat(filename, "/", sizeof(filename));
 539                 util_strlcat(filename, event->name, sizeof(filename));
 540                 udev_device_set_devnode(dev, filename);
 541
 542                 /* read current database entry; cleanup, if it is known device */
 543                 dev_old = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
 544                 if (dev_old != NULL) {
 545                         if (udev_device_get_devnode(dev_old) != NULL) {
 546                                 info(event->udev, "device node '%s' already in database, updating\n",
 547                                      udev_device_get_devnode(dev_old));
 548                                 udev_node_update_old_links(dev, dev_old, event->test);
 549                         }
 550                         udev_device_unref(dev_old);
 551                 }
 552
 553                 udev_device_update_db(dev);
 554
 555                 err = udev_node_add(dev, event->mode, event->uid, event->gid, event->test);
 556                 if (err != 0)
 557                         goto exit;
 558
 559                 goto exit;
 560         }
 561
 562         /* add netif */
 563         if (strcmp(udev_device_get_subsystem(dev), "net") == 0 && strcmp(udev_device_get_action(dev), "add") == 0) {
 564                 dbg(event->udev, "netif add '%s'\n", udev_device_get_devpath(dev));
 565
 566                 udev_rules_apply_to_event(rules, event);
 567                 if (event->ignore_device) {
 568                         info(event->udev, "device event will be ignored\n");
 569                         goto exit;
 570                 }
 571                 if (event->name[0] == '\0') {
 572                         info(event->udev, "device renaming supressed\n");
 573                         goto exit;
 574                 }
 575
 576                 /* look if we want to change the name of the netif */
 577                 if (strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
 578                         char syspath[UTIL_PATH_SIZE];
 579                         char *pos;
 580
 581                         err = rename_netif(event);
 582                         if (err != 0)
 583                                 goto exit;
 584                         info(event->udev, "renamed netif to '%s'\n", event->name);
 585
 586                         /* remember old name */
 587                         udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
 588
 589                         /* now change the devpath, because the kernel device name has changed */
 590                         util_strlcpy(syspath, udev_device_get_syspath(dev), sizeof(syspath));
 591                         pos = strrchr(syspath, '/');
 592                         if (pos != NULL) {
 593                                 pos[1] = '\0';
 594                                 util_strlcat(syspath, event->name, sizeof(syspath));
 595                                 udev_device_set_syspath(event->dev, syspath);
 596                                 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
 597                                 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
 598                         }
 599                 }
 600                 goto exit;
 601         }
 602
 603         /* remove device node */
 604         if (major(udev_device_get_devnum(dev)) != 0 && strcmp(udev_device_get_action(dev), "remove") == 0) {
 605                 /* import database entry and delete it */
 606                 udev_device_read_db(dev);
 607                 if (!event->test)
 608                         udev_device_delete_db(dev);
 609
 610                 if (udev_device_get_devnode(dev) == NULL) {
 611                         char devnode[UTIL_PATH_SIZE];
 612
 613                         info(event->udev, "'%s' not found in database, using kernel name '%s'\n",
 614                              udev_device_get_syspath(dev), udev_device_get_sysname(dev));
 615                         util_strlcpy(devnode, udev_get_dev_path(event->udev), sizeof(devnode));
 616                         util_strlcat(devnode, "/", sizeof(devnode));
 617                         util_strlcat(devnode, udev_device_get_sysname(dev), sizeof(devnode));
 618                         udev_device_set_devnode(dev, devnode);
 619                 }
 620
 621                 udev_rules_apply_to_event(rules, event);
 622                 if (event->ignore_device) {
 623                         info(event->udev, "device event will be ignored\n");
 624                         goto exit;
 625                 }
 626
 627                 if (udev_device_get_ignore_remove(dev)) {
 628                         info(event->udev, "ignore_remove for '%s'\n", udev_device_get_devnode(dev));
 629                         goto exit;
 630                 }
 631
 632                 err = udev_node_remove(dev, event->test);
 633                 goto exit;
 634         }
 635
 636         /* default devices */
 637         udev_rules_apply_to_event(rules, event);
 638         if (event->ignore_device)
 639                 info(event->udev, "device event will be ignored\n");
 640 exit:
 641         return err;
 642 }
 643
 644 int udev_event_execute_run(struct udev_event *event)
 645 {
 646         struct udev_list_entry *list_entry;
 647         int err = 0;
 648
 649         dbg(event->udev, "executing run list\n");
 650         udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
 651                 const char *cmd = udev_list_entry_get_name(list_entry);
 652
 653                 if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
 654                         struct udev_monitor *monitor;
 655
 656                         monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
 657                         if (monitor == NULL)
 658                                 continue;
 659                         udev_monitor_send_device(monitor, event->dev);
 660                         udev_monitor_unref(monitor);
 661                 } else {
 662                         char program[UTIL_PATH_SIZE];
 663                         char **envp;
 664
 665                         util_strlcpy(program, cmd, sizeof(program));
 666                         udev_event_apply_format(event, program, sizeof(program));
 667                         envp = udev_device_get_properties_envp(event->dev);
 668                         if (util_run_program(event->udev, program, envp, NULL, 0, NULL) != 0) {
 669                                 if (!udev_list_entry_get_flag(list_entry))
 670                                         err = -1;
 671                         }
 672                 }
 673         }
 674         return err;
 675 }