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         if (event == NULL)
  51                 return;
  52         udev_list_cleanup_entries(event->udev, &event->run_list);
  53         free(event->tmp_node);
  54         free(event->program_result);
  55         dbg(event->udev, "free event %p\n", event);
  56         free(event);
  57 }
  58
  59 /* extract possible {attr} and move str behind it */
  60 static char *get_format_attribute(struct udev *udev, char **str)
  61 {
  62         char *pos;
  63         char *attr = NULL;
  64
  65         if (*str[0] == '{') {
  66                 pos = strchr(*str, '}');
  67                 if (pos == NULL) {
  68                         err(udev, "missing closing brace for format\n");
  69                         return NULL;
  70                 }
  71                 pos[0] = '\0';
  72                 attr = *str+1;
  73                 *str = pos+1;
  74                 dbg(udev, "attribute='%s', str='%s'\n", attr, *str);
  75         }
  76         return attr;
  77 }
  78
  79 /* extract possible format length and move str behind it*/
  80 static int get_format_len(struct udev *udev, char **str)
  81 {
  82         int num;
  83         char *tail;
  84
  85         if (isdigit(*str[0])) {
  86                 num = (int) strtoul(*str, &tail, 10);
  87                 if (num > 0) {
  88                         *str = tail;
  89                         dbg(udev, "format length=%i\n", num);
  90                         return num;
  91                 } else {
  92                         err(udev, "format parsing error '%s'\n", *str);
  93                 }
  94         }
  95         return -1;
  96 }
  97
  98 void udev_event_apply_format(struct udev_event *event, char *string, size_t maxsize)
  99 {
 100         struct udev_device *dev = event->dev;
 101         char temp[UTIL_PATH_SIZE];
 102         char temp2[UTIL_PATH_SIZE];
 103         char *head, *tail, *cpos, *attr, *rest;
 104         int len;
 105         int i;
 106         int count;
 107         enum subst_type {
 108                 SUBST_UNKNOWN,
 109                 SUBST_DEVPATH,
 110                 SUBST_KERNEL,
 111                 SUBST_KERNEL_NUMBER,
 112                 SUBST_ID,
 113                 SUBST_DRIVER,
 114                 SUBST_MAJOR,
 115                 SUBST_MINOR,
 116                 SUBST_RESULT,
 117                 SUBST_ATTR,
 118                 SUBST_PARENT,
 119                 SUBST_TEMP_NODE,
 120                 SUBST_NAME,
 121                 SUBST_LINKS,
 122                 SUBST_ROOT,
 123                 SUBST_SYS,
 124                 SUBST_ENV,
 125         };
 126         static const struct subst_map {
 127                 char *name;
 128                 char fmt;
 129                 enum subst_type type;
 130         } map[] = {
 131                 { .name = "devpath",    .fmt = 'p',     .type = SUBST_DEVPATH },
 132                 { .name = "number",     .fmt = 'n',     .type = SUBST_KERNEL_NUMBER },
 133                 { .name = "kernel",     .fmt = 'k',     .type = SUBST_KERNEL },
 134                 { .name = "id",         .fmt = 'b',     .type = SUBST_ID },
 135                 { .name = "driver",     .fmt = 'd',     .type = SUBST_DRIVER },
 136                 { .name = "major",      .fmt = 'M',     .type = SUBST_MAJOR },
 137                 { .name = "minor",      .fmt = 'm',     .type = SUBST_MINOR },
 138                 { .name = "result",     .fmt = 'c',     .type = SUBST_RESULT },
 139                 { .name = "attr",       .fmt = 's',     .type = SUBST_ATTR },
 140                 { .name = "sysfs",      .fmt = 's',     .type = SUBST_ATTR },
 141                 { .name = "parent",     .fmt = 'P',     .type = SUBST_PARENT },
 142                 { .name = "tempnode",   .fmt = 'N',     .type = SUBST_TEMP_NODE },
 143                 { .name = "name",       .fmt = 'D',     .type = SUBST_NAME },
 144                 { .name = "links",      .fmt = 'L',     .type = SUBST_LINKS },
 145                 { .name = "root",       .fmt = 'r',     .type = SUBST_ROOT },
 146                 { .name = "sys",        .fmt = 'S',     .type = SUBST_SYS },
 147                 { .name = "env",        .fmt = 'E',     .type = SUBST_ENV },
 148                 { NULL, '\0', 0 }
 149         };
 150         enum subst_type type;
 151         const struct subst_map *subst;
 152
 153         head = string;
 154         while (1) {
 155                 len = -1;
 156                 while (head[0] != '\0') {
 157                         if (head[0] == '$') {
 158                                 /* substitute named variable */
 159                                 if (head[1] == '\0')
 160                                         break;
 161                                 if (head[1] == '$') {
 162                                         util_strlcpy(temp, head+2, sizeof(temp));
 163                                         util_strlcpy(head+1, temp, maxsize);
 164                                         head++;
 165                                         continue;
 166                                 }
 167                                 head[0] = '\0';
 168                                 for (subst = map; subst->name; subst++) {
 169                                         if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
 170                                                 type = subst->type;
 171                                                 tail = head + strlen(subst->name)+1;
 172                                                 dbg(event->udev, "will substitute format name '%s'\n", subst->name);
 173                                                 goto found;
 174                                         }
 175                                 }
 176                                 head[0] = '$';
 177                                 err(event->udev, "unknown format variable '%s'\n", head);
 178                         } else if (head[0] == '%') {
 179                                 /* substitute format char */
 180                                 if (head[1] == '\0')
 181                                         break;
 182                                 if (head[1] == '%') {
 183                                         util_strlcpy(temp, head+2, sizeof(temp));
 184                                         util_strlcpy(head+1, temp, maxsize);
 185                                         head++;
 186                                         continue;
 187                                 }
 188                                 head[0] = '\0';
 189                                 tail = head+1;
 190                                 len = get_format_len(event->udev, &tail);
 191                                 for (subst = map; subst->name; subst++) {
 192                                         if (tail[0] == subst->fmt) {
 193                                                 type = subst->type;
 194                                                 tail++;
 195                                                 dbg(event->udev, "will substitute format char '%c'\n", subst->fmt);
 196                                                 goto found;
 197                                         }
 198                                 }
 199                                 head[0] = '%';
 200                                 err(event->udev, "unknown format char '%c'\n", tail[0]);
 201                         }
 202                         head++;
 203                 }
 204                 break;
 205 found:
 206                 attr = get_format_attribute(event->udev, &tail);
 207                 util_strlcpy(temp, tail, sizeof(temp));
 208                 dbg(event->udev, "format=%i, string='%s', tail='%s'\n", type ,string, tail);
 209
 210                 switch (type) {
 211                 case SUBST_DEVPATH:
 212                         util_strlcat(string, udev_device_get_devpath(dev), maxsize);
 213                         dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
 214                         break;
 215                 case SUBST_KERNEL:
 216                         util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 217                         dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
 218                         break;
 219                 case SUBST_KERNEL_NUMBER:
 220                         if (udev_device_get_sysnum(dev) == NULL)
 221                                 break;
 222                         util_strlcat(string, udev_device_get_sysnum(dev), maxsize);
 223                         dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
 224                         break;
 225                 case SUBST_ID:
 226                         if (event->dev_parent != NULL) {
 227                                 util_strlcat(string, udev_device_get_sysname(event->dev_parent), maxsize);
 228                                 dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
 229                         }
 230                         break;
 231                 case SUBST_DRIVER:
 232                         if (event->dev_parent != NULL) {
 233                                 const char *driver = udev_device_get_driver(event->dev_parent);
 234
 235                                 if (driver == NULL)
 236                                         break;
 237                                 util_strlcat(string, driver, maxsize);
 238                                 dbg(event->udev, "substitute driver '%s'\n", driver);
 239                         }
 240                         break;
 241                 case SUBST_MAJOR:
 242                         sprintf(temp2, "%d", major(udev_device_get_devnum(dev)));
 243                         util_strlcat(string, temp2, maxsize);
 244                         dbg(event->udev, "substitute major number '%s'\n", temp2);
 245                         break;
 246                 case SUBST_MINOR:
 247                         sprintf(temp2, "%d", minor(udev_device_get_devnum(dev)));
 248                         util_strlcat(string, temp2, maxsize);
 249                         dbg(event->udev, "substitute minor number '%s'\n", temp2);
 250                         break;
 251                 case SUBST_RESULT:
 252                         if (event->program_result == NULL)
 253                                 break;
 254                         /* get part part of the result string */
 255                         i = 0;
 256                         if (attr != NULL)
 257                                 i = strtoul(attr, &rest, 10);
 258                         if (i > 0) {
 259                                 char result[UTIL_PATH_SIZE];
 260
 261                                 dbg(event->udev, "request part #%d of result string\n", i);
 262                                 util_strlcpy(result, event->program_result, sizeof(result));
 263                                 cpos = result;
 264                                 while (--i) {
 265                                         while (cpos[0] != '\0' && !isspace(cpos[0]))
 266                                                 cpos++;
 267                                         while (isspace(cpos[0]))
 268                                                 cpos++;
 269                                 }
 270                                 if (i > 0) {
 271                                         err(event->udev, "requested part of result string not found\n");
 272                                         break;
 273                                 }
 274                                 util_strlcpy(temp2, cpos, sizeof(temp2));
 275                                 /* %{2+}c copies the whole string from the second part on */
 276                                 if (rest[0] != '+') {
 277                                         cpos = strchr(temp2, ' ');
 278                                         if (cpos)
 279                                                 cpos[0] = '\0';
 280                                 }
 281                                 util_strlcat(string, temp2, maxsize);
 282                                 dbg(event->udev, "substitute part of result string '%s'\n", temp2);
 283                         } else {
 284                                 util_strlcat(string, event->program_result, maxsize);
 285                                 dbg(event->udev, "substitute result string '%s'\n", event->program_result);
 286                         }
 287                         break;
 288                 case SUBST_ATTR:
 289                         if (attr == NULL)
 290                                 err(event->udev, "missing file parameter for attr\n");
 291                         else {
 292                                 const char *val;
 293                                 char value[UTIL_NAME_SIZE] = "";
 294                                 size_t size;
 295
 296                                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
 297
 298                                 val = udev_device_get_sysattr_value(event->dev, attr);
 299                                 if (val != NULL)
 300                                         util_strlcpy(value, val, sizeof(value));
 301
 302                                 /* try the current device, other matches may have selected */
 303                                 if (value[0] == '\0' && event->dev_parent != NULL && event->dev_parent != event->dev) {
 304                                         val = udev_device_get_sysattr_value(event->dev_parent, attr);
 305                                         if (val != NULL)
 306                                                 util_strlcpy(value, val, sizeof(value));
 307                                 }
 308
 309                                 if (value[0]=='\0')
 310                                         break;
 311
 312                                 /* strip trailing whitespace, and replace unwanted characters */
 313                                 size = strlen(value);
 314                                 while (size > 0 && isspace(value[--size]))
 315                                         value[size] = '\0';
 316                                 count = util_replace_chars(value, ALLOWED_CHARS_INPUT);
 317                                 if (count > 0)
 318                                         info(event->udev, "%i character(s) replaced\n" , count);
 319                                 util_strlcat(string, value, maxsize);
 320                                 dbg(event->udev, "substitute sysfs value '%s'\n", value);
 321                         }
 322                         break;
 323                 case SUBST_PARENT:
 324                         {
 325                                 struct udev_device *dev_parent;
 326                                 const char *devnode;
 327
 328                                 dev_parent = udev_device_get_parent(event->dev);
 329                                 if (dev_parent == NULL)
 330                                         break;
 331                                 devnode = udev_device_get_devnode(dev_parent);
 332                                 if (devnode != NULL) {
 333                                         size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
 334
 335                                         util_strlcat(string, &devnode[devlen], maxsize);
 336                                         dbg(event->udev, "found parent '%s', got node name '%s'\n",
 337                                             udev_device_get_syspath(dev_parent), &devnode[devlen]);
 338                                 }
 339                         }
 340                         break;
 341                 case SUBST_TEMP_NODE:
 342                         {
 343                                 dev_t devnum;
 344                                 struct stat statbuf;
 345                                 char filename[UTIL_PATH_SIZE];
 346                                 const char *devtype;
 347
 348                                 if (event->tmp_node != NULL) {
 349                                         util_strlcat(string, event->tmp_node, maxsize);
 350                                         dbg(event->udev, "return existing temporary node\n");
 351                                         break;
 352                                 }
 353                                 devnum = udev_device_get_devnum(dev);
 354                                 if (major(udev_device_get_devnum(dev) == 0))
 355                                         break;
 356                                 if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
 357                                         devtype = "block";
 358                                 else
 359                                         devtype = "char";
 360                                 snprintf(filename, sizeof(filename), "%s/%s/%u:%u",
 361                                          udev_get_dev_path(event->udev), devtype,
 362                                          major(udev_device_get_devnum(dev)),
 363                                          minor(udev_device_get_devnum(dev)));
 364                                 if (stat(filename, &statbuf) == 0 && statbuf.st_rdev == devnum) {
 365                                         util_strlcat(string, filename, maxsize);
 366                                         dbg(event->udev, "return existing temporary node\n");
 367                                         break;
 368                                 }
 369                                 dbg(event->udev, "create temporary node\n");
 370                                 asprintf(&event->tmp_node, "%s/.tmp-%s-%u:%u",
 371                                          udev_get_dev_path(event->udev), devtype,
 372                                          major(udev_device_get_devnum(dev)),
 373                                          minor(udev_device_get_devnum(dev)));
 374                                 if (event->tmp_node == NULL)
 375                                         break;
 376                                 udev_node_mknod(dev, event->tmp_node, makedev(0, 0), 0600, 0, 0);
 377                                 util_strlcat(string, event->tmp_node, maxsize);
 378                         }
 379                         break;
 380                 case SUBST_NAME:
 381                         if (event->name != NULL) {
 382                                 util_strlcat(string, event->name, maxsize);
 383                                 dbg(event->udev, "substitute name '%s'\n", event->name);
 384                         } else {
 385                                 util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 386                                 dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
 387                         }
 388                         break;
 389                 case SUBST_LINKS:
 390                         {
 391                                 struct udev_list_entry *list_entry;
 392
 393                                 list_entry = udev_device_get_properties_list_entry(dev);
 394                                 util_strlcpy(string, udev_list_entry_get_name(list_entry), maxsize);
 395                                 udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
 396                                         util_strlcat(string, " ", maxsize);
 397                                         util_strlcat(string, udev_list_entry_get_name(list_entry), maxsize);
 398                                 }
 399                         }
 400                         break;
 401                 case SUBST_ROOT:
 402                         util_strlcat(string, udev_get_dev_path(event->udev), maxsize);
 403                         dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
 404                         break;
 405                 case SUBST_SYS:
 406                         util_strlcat(string, udev_get_sys_path(event->udev), maxsize);
 407                         dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
 408                         break;
 409                 case SUBST_ENV:
 410                         if (attr == NULL) {
 411                                 dbg(event->udev, "missing attribute\n");
 412                                 break;
 413                         } else {
 414                                 struct udev_list_entry *list_entry;
 415                                 const char *value;
 416
 417                                 list_entry = udev_device_get_properties_list_entry(event->dev);
 418                                 list_entry = udev_list_entry_get_by_name(list_entry, attr);
 419                                 if (list_entry == NULL)
 420                                         break;
 421                                 value = udev_list_entry_get_value(list_entry);
 422                                 dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
 423                                 util_strlcat(string, value, maxsize);
 424                                 break;
 425                         }
 426                 default:
 427                         err(event->udev, "unknown substitution type=%i\n", type);
 428                         break;
 429                 }
 430                 /* possibly truncate to format-char specified length */
 431                 if (len >= 0 && len < (int)strlen(head)) {
 432                         head[len] = '\0';
 433                         dbg(event->udev, "truncate to %i chars, subtitution string becomes '%s'\n", len, head);
 434                 }
 435                 util_strlcat(string, temp, maxsize);
 436         }
 437 }
 438
 439 static void rename_netif_kernel_log(struct ifreq ifr)
 440 {
 441         int klog;
 442         FILE *f;
 443
 444         klog = open("/dev/kmsg", O_WRONLY);
 445         if (klog < 0)
 446                 return;
 447
 448         f = fdopen(klog, "w");
 449         if (f == NULL) {
 450                 close(klog);
 451                 return;
 452         }
 453
 454         fprintf(f, "<6>udev: renamed network interface %s to %s\n",
 455                 ifr.ifr_name, ifr.ifr_newname);
 456         fclose(f);
 457 }
 458
 459 static int rename_netif(struct udev_event *event)
 460 {
 461         struct udev_device *dev = event->dev;
 462         int sk;
 463         struct ifreq ifr;
 464         int err;
 465
 466         info(event->udev, "changing net interface name from '%s' to '%s'\n",
 467              udev_device_get_sysname(dev), event->name);
 468         if (event->test)
 469                 return 0;
 470
 471         sk = socket(PF_INET, SOCK_DGRAM, 0);
 472         if (sk < 0) {
 473                 err(event->udev, "error opening socket: %m\n");
 474                 return -1;
 475         }
 476
 477         memset(&ifr, 0x00, sizeof(struct ifreq));
 478         util_strlcpy(ifr.ifr_name, udev_device_get_sysname(dev), IFNAMSIZ);
 479         util_strlcpy(ifr.ifr_newname, event->name, IFNAMSIZ);
 480         err = ioctl(sk, SIOCSIFNAME, &ifr);
 481         if (err == 0)
 482                 rename_netif_kernel_log(ifr);
 483         else {
 484                 int loop;
 485
 486                 /* see if the destination interface name already exists */
 487                 if (errno != EEXIST) {
 488                         err(event->udev, "error changing netif name %s to %s: %m\n",
 489                             ifr.ifr_name, ifr.ifr_newname);
 490                         goto exit;
 491                 }
 492
 493                 /* free our own name, another process may wait for us */
 494                 util_strlcpy(ifr.ifr_newname, udev_device_get_sysname(dev), IFNAMSIZ);
 495                 util_strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
 496                 err = ioctl(sk, SIOCSIFNAME, &ifr);
 497                 if (err != 0) {
 498                         err(event->udev, "error changing netif name %s to %s: %m\n",
 499                             ifr.ifr_name, ifr.ifr_newname);
 500                         goto exit;
 501                 }
 502
 503                 /* wait 30 seconds for our target to become available */
 504                 util_strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
 505                 util_strlcpy(ifr.ifr_newname, udev_device_get_devnode(dev), IFNAMSIZ);
 506                 loop = 30 * 20;
 507                 while (loop--) {
 508                         err = ioctl(sk, SIOCSIFNAME, &ifr);
 509                         if (err == 0) {
 510                                 rename_netif_kernel_log(ifr);
 511                                 break;
 512                         }
 513
 514                         if (errno != EEXIST) {
 515                                 err(event->udev, "error changing net interface name %s to %s: %m\n",
 516                                     ifr.ifr_name, ifr.ifr_newname);
 517                                 break;
 518                         }
 519                         dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
 520                             udev_device_get_devnode(dev), (30 * 20) - loop);
 521                         usleep(1000 * 1000 / 20);
 522                 }
 523         }
 524 exit:
 525         close(sk);
 526         return err;
 527 }
 528
 529 int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules)
 530 {
 531         struct udev_device *dev = event->dev;
 532         int err = 0;
 533
 534         if (udev_device_get_devpath_old(dev) != NULL) {
 535                 if (udev_device_rename_db(dev, udev_device_get_devpath(dev)) == 0)
 536                         info(event->udev, "moved database from '%s' to '%s'\n",
 537                              udev_device_get_devpath_old(dev), udev_device_get_devpath(dev));
 538         }
 539
 540         /* add device node */
 541         if (major(udev_device_get_devnum(dev)) != 0 &&
 542             (strcmp(udev_device_get_action(dev), "add") == 0 || strcmp(udev_device_get_action(dev), "change") == 0)) {
 543                 char filename[UTIL_PATH_SIZE];
 544                 struct udev_device *dev_old;
 545
 546                 dbg(event->udev, "device node add '%s'\n", udev_device_get_devpath(dev));
 547
 548                 udev_rules_apply_to_event(rules, event);
 549                 if (event->tmp_node != NULL) {
 550                         dbg(event->udev, "removing temporary device node\n");
 551                         util_unlink_secure(event->udev, event->tmp_node);
 552                         free(event->tmp_node);
 553                         event->tmp_node = NULL;
 554                 }
 555
 556                 if (event->ignore_device) {
 557                         info(event->udev, "device event will be ignored\n");
 558                         goto exit;
 559                 }
 560
 561                 if (event->name_ignore) {
 562                         info(event->udev, "device node creation supressed\n");
 563                         goto exit;
 564                 }
 565
 566                 if (event->name[0] == '\0') {
 567                         info(event->udev, "no node name set, will use kernel name '%s'\n",
 568                              udev_device_get_sysname(event->dev));
 569                         util_strlcpy(event->name, udev_device_get_sysname(event->dev), sizeof(event->name));
 570                 }
 571
 572                 /* set device node name */
 573                 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
 574                 util_strlcat(filename, "/", sizeof(filename));
 575                 util_strlcat(filename, event->name, sizeof(filename));
 576                 udev_device_set_devnode(dev, filename);
 577
 578                 /* read current database entry; cleanup, if it is known device */
 579                 dev_old = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
 580                 if (dev_old != NULL) {
 581                         if (udev_device_get_devnode(dev_old) != NULL) {
 582                                 info(event->udev, "device node '%s' already in database, updating\n",
 583                                      udev_device_get_devnode(dev_old));
 584                                 udev_node_update_old_links(dev, dev_old, event->test);
 585                         }
 586                         udev_device_unref(dev_old);
 587                 }
 588
 589                 udev_device_update_db(dev);
 590
 591                 err = udev_node_add(dev, event->mode, event->uid, event->gid, event->test);
 592                 if (err != 0)
 593                         goto exit;
 594
 595                 goto exit;
 596         }
 597
 598         /* add netif */
 599         if (strcmp(udev_device_get_subsystem(dev), "net") == 0 && strcmp(udev_device_get_action(dev), "add") == 0) {
 600                 dbg(event->udev, "netif add '%s'\n", udev_device_get_devpath(dev));
 601
 602                 udev_rules_apply_to_event(rules, event);
 603                 if (event->ignore_device) {
 604                         info(event->udev, "device event will be ignored\n");
 605                         goto exit;
 606                 }
 607                 if (event->name[0] == '\0') {
 608                         info(event->udev, "device renaming supressed\n");
 609                         goto exit;
 610                 }
 611
 612                 /* look if we want to change the name of the netif */
 613                 if (strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
 614                         char syspath[UTIL_PATH_SIZE];
 615                         char *pos;
 616
 617                         err = rename_netif(event);
 618                         if (err != 0)
 619                                 goto exit;
 620                         info(event->udev, "renamed netif to '%s'\n", event->name);
 621
 622                         /* remember old name */
 623                         udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
 624
 625                         /* now change the devpath, because the kernel device name has changed */
 626                         util_strlcpy(syspath, udev_device_get_syspath(dev), sizeof(syspath));
 627                         pos = strrchr(syspath, '/');
 628                         if (pos != NULL) {
 629                                 pos[1] = '\0';
 630                                 util_strlcat(syspath, event->name, sizeof(syspath));
 631                                 udev_device_set_syspath(event->dev, syspath);
 632                                 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
 633                                 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
 634                         }
 635                 }
 636                 goto exit;
 637         }
 638
 639         /* remove device node */
 640         if (major(udev_device_get_devnum(dev)) != 0 && strcmp(udev_device_get_action(dev), "remove") == 0) {
 641                 /* import database entry and delete it */
 642                 udev_device_read_db(dev);
 643                 if (!event->test)
 644                         udev_device_delete_db(dev);
 645
 646                 if (udev_device_get_devnode(dev) == NULL) {
 647                         char devnode[UTIL_PATH_SIZE];
 648
 649                         info(event->udev, "'%s' not found in database, using kernel name '%s'\n",
 650                              udev_device_get_syspath(dev), udev_device_get_sysname(dev));
 651                         util_strlcpy(devnode, udev_get_dev_path(event->udev), sizeof(devnode));
 652                         util_strlcat(devnode, "/", sizeof(devnode));
 653                         util_strlcat(devnode, udev_device_get_sysname(dev), sizeof(devnode));
 654                         udev_device_set_devnode(dev, devnode);
 655                 }
 656
 657                 udev_rules_apply_to_event(rules, event);
 658                 if (event->ignore_device) {
 659                         info(event->udev, "device event will be ignored\n");
 660                         goto exit;
 661                 }
 662
 663                 if (udev_device_get_ignore_remove(dev)) {
 664                         info(event->udev, "ignore_remove for '%s'\n", udev_device_get_devnode(dev));
 665                         goto exit;
 666                 }
 667
 668                 err = udev_node_remove(dev, event->test);
 669                 goto exit;
 670         }
 671
 672         /* default devices */
 673         udev_rules_apply_to_event(rules, event);
 674         if (event->ignore_device)
 675                 info(event->udev, "device event will be ignored\n");
 676 exit:
 677         return err;
 678 }
 679
 680 int udev_event_execute_run(struct udev_event *event)
 681 {
 682         struct udev_list_entry *list_entry;
 683         int err = 0;
 684
 685         dbg(event->udev, "executing run list\n");
 686         udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
 687                 const char *cmd = udev_list_entry_get_name(list_entry);
 688
 689                 if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
 690                         struct udev_monitor *monitor;
 691
 692                         monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
 693                         if (monitor == NULL)
 694                                 continue;
 695                         udev_monitor_send_device(monitor, event->dev);
 696                         udev_monitor_unref(monitor);
 697                 } else {
 698                         char program[UTIL_PATH_SIZE];
 699                         char **envp;
 700
 701                         util_strlcpy(program, cmd, sizeof(program));
 702                         udev_event_apply_format(event, program, sizeof(program));
 703                         envp = udev_device_get_properties_envp(event->dev);
 704                         if (util_run_program(event->udev, program, envp, NULL, 0, NULL) != 0) {
 705                                 if (!udev_list_entry_get_flag(list_entry))
 706                                         err = -1;
 707                         }
 708                 }
 709         }
 710         return err;
 711 }