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                         {
 336                                 dev_t devnum;
 337                                 struct stat statbuf;
 338                                 char filename[UTIL_PATH_SIZE];
 339                                 const char *devtype;
 340
 341                                 if (event->tmp_node[0] != '\0') {
 342                                         util_strlcat(string, event->tmp_node, maxsize);
 343                                         dbg(event->udev, "return existing temporary node\n");
 344                                         break;
 345                                 }
 346                                 devnum = udev_device_get_devnum(dev);
 347                                 if (major(udev_device_get_devnum(dev) == 0))
 348                                         break;
 349                                 if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
 350                                         devtype = "block";
 351                                 else
 352                                         devtype = "char";
 353                                 snprintf(filename, sizeof(filename), "%s/%s/%u:%u",
 354                                          udev_get_dev_path(event->udev), devtype,
 355                                          major(udev_device_get_devnum(dev)),
 356                                          minor(udev_device_get_devnum(dev)));
 357                                 if (stat(filename, &statbuf) == 0 && statbuf.st_rdev == devnum) {
 358                                         util_strlcat(string, filename, maxsize);
 359                                         dbg(event->udev, "return existing temporary node\n");
 360                                         break;
 361                                 }
 362                                 dbg(event->udev, "create temporary node\n");
 363                                 snprintf(event->tmp_node, sizeof(event->tmp_node), "%s/.tmp-%s-%u:%u",
 364                                          udev_get_dev_path(event->udev), devtype,
 365                                          major(udev_device_get_devnum(dev)),
 366                                          minor(udev_device_get_devnum(dev)));
 367                                 udev_node_mknod(dev, event->tmp_node, makedev(0, 0), 0600, 0, 0);
 368                                 util_strlcat(string, event->tmp_node, maxsize);
 369                         }
 370                         break;
 371                 case SUBST_NAME:
 372                         if (event->name != NULL) {
 373                                 util_strlcat(string, event->name, maxsize);
 374                                 dbg(event->udev, "substitute name '%s'\n", event->name);
 375                         } else {
 376                                 util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 377                                 dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
 378                         }
 379                         break;
 380                 case SUBST_LINKS:
 381                         {
 382                                 struct udev_list_entry *list_entry;
 383
 384                                 list_entry = udev_device_get_properties_list_entry(dev);
 385                                 util_strlcpy(string, udev_list_entry_get_name(list_entry), maxsize);
 386                                 udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
 387                                         util_strlcat(string, " ", maxsize);
 388                                         util_strlcat(string, udev_list_entry_get_name(list_entry), maxsize);
 389                                 }
 390                         }
 391                         break;
 392                 case SUBST_ROOT:
 393                         util_strlcat(string, udev_get_dev_path(event->udev), maxsize);
 394                         dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
 395                         break;
 396                 case SUBST_SYS:
 397                         util_strlcat(string, udev_get_sys_path(event->udev), maxsize);
 398                         dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
 399                         break;
 400                 case SUBST_ENV:
 401                         if (attr == NULL) {
 402                                 dbg(event->udev, "missing attribute\n");
 403                                 break;
 404                         } else {
 405                                 struct udev_list_entry *list_entry;
 406                                 const char *value;
 407
 408                                 list_entry = udev_device_get_properties_list_entry(event->dev);
 409                                 list_entry = udev_list_entry_get_by_name(list_entry, attr);
 410                                 if (list_entry == NULL)
 411                                         break;
 412                                 value = udev_list_entry_get_value(list_entry);
 413                                 dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
 414                                 util_strlcat(string, value, maxsize);
 415                                 break;
 416                         }
 417                 default:
 418                         err(event->udev, "unknown substitution type=%i\n", type);
 419                         break;
 420                 }
 421                 /* possibly truncate to format-char specified length */
 422                 if (len >= 0 && len < (int)strlen(head)) {
 423                         head[len] = '\0';
 424                         dbg(event->udev, "truncate to %i chars, subtitution string becomes '%s'\n", len, head);
 425                 }
 426                 util_strlcat(string, temp, maxsize);
 427         }
 428 }
 429
 430 static void rename_netif_kernel_log(struct ifreq ifr)
 431 {
 432         int klog;
 433         FILE *f;
 434
 435         klog = open("/dev/kmsg", O_WRONLY);
 436         if (klog < 0)
 437                 return;
 438
 439         f = fdopen(klog, "w");
 440         if (f == NULL) {
 441                 close(klog);
 442                 return;
 443         }
 444
 445         fprintf(f, "<6>udev: renamed network interface %s to %s\n",
 446                 ifr.ifr_name, ifr.ifr_newname);
 447         fclose(f);
 448 }
 449
 450 static int rename_netif(struct udev_event *event)
 451 {
 452         struct udev_device *dev = event->dev;
 453         int sk;
 454         struct ifreq ifr;
 455         int err;
 456
 457         info(event->udev, "changing net interface name from '%s' to '%s'\n",
 458              udev_device_get_sysname(dev), event->name);
 459         if (event->test)
 460                 return 0;
 461
 462         sk = socket(PF_INET, SOCK_DGRAM, 0);
 463         if (sk < 0) {
 464                 err(event->udev, "error opening socket: %m\n");
 465                 return -1;
 466         }
 467
 468         memset(&ifr, 0x00, sizeof(struct ifreq));
 469         util_strlcpy(ifr.ifr_name, udev_device_get_sysname(dev), IFNAMSIZ);
 470         util_strlcpy(ifr.ifr_newname, event->name, IFNAMSIZ);
 471         err = ioctl(sk, SIOCSIFNAME, &ifr);
 472         if (err == 0)
 473                 rename_netif_kernel_log(ifr);
 474         else {
 475                 int loop;
 476
 477                 /* see if the destination interface name already exists */
 478                 if (errno != EEXIST) {
 479                         err(event->udev, "error changing netif name %s to %s: %m\n",
 480                             ifr.ifr_name, ifr.ifr_newname);
 481                         goto exit;
 482                 }
 483
 484                 /* free our own name, another process may wait for us */
 485                 util_strlcpy(ifr.ifr_newname, udev_device_get_sysname(dev), IFNAMSIZ);
 486                 util_strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
 487                 err = ioctl(sk, SIOCSIFNAME, &ifr);
 488                 if (err != 0) {
 489                         err(event->udev, "error changing netif name %s to %s: %m\n",
 490                             ifr.ifr_name, ifr.ifr_newname);
 491                         goto exit;
 492                 }
 493
 494                 /* wait 30 seconds for our target to become available */
 495                 util_strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
 496                 util_strlcpy(ifr.ifr_newname, udev_device_get_devnode(dev), IFNAMSIZ);
 497                 loop = 30 * 20;
 498                 while (loop--) {
 499                         err = ioctl(sk, SIOCSIFNAME, &ifr);
 500                         if (err == 0) {
 501                                 rename_netif_kernel_log(ifr);
 502                                 break;
 503                         }
 504
 505                         if (errno != EEXIST) {
 506                                 err(event->udev, "error changing net interface name %s to %s: %m\n",
 507                                     ifr.ifr_name, ifr.ifr_newname);
 508                                 break;
 509                         }
 510                         dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
 511                             udev_device_get_devnode(dev), (30 * 20) - loop);
 512                         usleep(1000 * 1000 / 20);
 513                 }
 514         }
 515 exit:
 516         close(sk);
 517         return err;
 518 }
 519
 520 int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules)
 521 {
 522         struct udev_device *dev = event->dev;
 523         int err = 0;
 524
 525         if (udev_device_get_devpath_old(dev) != NULL) {
 526                 if (udev_device_rename_db(dev, udev_device_get_devpath(dev)) == 0)
 527                         info(event->udev, "moved database from '%s' to '%s'\n",
 528                              udev_device_get_devpath_old(dev), udev_device_get_devpath(dev));
 529         }
 530
 531         /* add device node */
 532         if (major(udev_device_get_devnum(dev)) != 0 &&
 533             (strcmp(udev_device_get_action(dev), "add") == 0 || strcmp(udev_device_get_action(dev), "change") == 0)) {
 534                 char filename[UTIL_PATH_SIZE];
 535                 struct udev_device *dev_old;
 536
 537                 dbg(event->udev, "device node add '%s'\n", udev_device_get_devpath(dev));
 538
 539                 udev_rules_apply_to_event(rules, event);
 540                 if (event->tmp_node[0] != '\0') {
 541                         dbg(event->udev, "removing temporary device node\n");
 542                         util_unlink_secure(event->udev, event->tmp_node);
 543                         event->tmp_node[0] = '\0';
 544                 }
 545
 546                 if (event->ignore_device) {
 547                         info(event->udev, "device event will be ignored\n");
 548                         goto exit;
 549                 }
 550
 551                 if (event->name_ignore) {
 552                         info(event->udev, "device node creation supressed\n");
 553                         goto exit;
 554                 }
 555
 556                 if (event->name[0] == '\0') {
 557                         info(event->udev, "no node name set, will use kernel name '%s'\n",
 558                              udev_device_get_sysname(event->dev));
 559                         util_strlcpy(event->name, udev_device_get_sysname(event->dev), sizeof(event->name));
 560                 }
 561
 562                 /* set device node name */
 563                 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
 564                 util_strlcat(filename, "/", sizeof(filename));
 565                 util_strlcat(filename, event->name, sizeof(filename));
 566                 udev_device_set_devnode(dev, filename);
 567
 568                 /* read current database entry; cleanup, if it is known device */
 569                 dev_old = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
 570                 if (dev_old != NULL) {
 571                         if (udev_device_get_devnode(dev_old) != NULL) {
 572                                 info(event->udev, "device node '%s' already in database, updating\n",
 573                                      udev_device_get_devnode(dev_old));
 574                                 udev_node_update_old_links(dev, dev_old, event->test);
 575                         }
 576                         udev_device_unref(dev_old);
 577                 }
 578
 579                 udev_device_update_db(dev);
 580
 581                 err = udev_node_add(dev, event->mode, event->uid, event->gid, event->test);
 582                 if (err != 0)
 583                         goto exit;
 584
 585                 goto exit;
 586         }
 587
 588         /* add netif */
 589         if (strcmp(udev_device_get_subsystem(dev), "net") == 0 && strcmp(udev_device_get_action(dev), "add") == 0) {
 590                 dbg(event->udev, "netif add '%s'\n", udev_device_get_devpath(dev));
 591
 592                 udev_rules_apply_to_event(rules, event);
 593                 if (event->ignore_device) {
 594                         info(event->udev, "device event will be ignored\n");
 595                         goto exit;
 596                 }
 597                 if (event->name[0] == '\0') {
 598                         info(event->udev, "device renaming supressed\n");
 599                         goto exit;
 600                 }
 601
 602                 /* look if we want to change the name of the netif */
 603                 if (strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
 604                         char syspath[UTIL_PATH_SIZE];
 605                         char *pos;
 606
 607                         err = rename_netif(event);
 608                         if (err != 0)
 609                                 goto exit;
 610                         info(event->udev, "renamed netif to '%s'\n", event->name);
 611
 612                         /* remember old name */
 613                         udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
 614
 615                         /* now change the devpath, because the kernel device name has changed */
 616                         util_strlcpy(syspath, udev_device_get_syspath(dev), sizeof(syspath));
 617                         pos = strrchr(syspath, '/');
 618                         if (pos != NULL) {
 619                                 pos[1] = '\0';
 620                                 util_strlcat(syspath, event->name, sizeof(syspath));
 621                                 udev_device_set_syspath(event->dev, syspath);
 622                                 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
 623                                 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
 624                         }
 625                 }
 626                 goto exit;
 627         }
 628
 629         /* remove device node */
 630         if (major(udev_device_get_devnum(dev)) != 0 && strcmp(udev_device_get_action(dev), "remove") == 0) {
 631                 /* import database entry and delete it */
 632                 udev_device_read_db(dev);
 633                 if (!event->test)
 634                         udev_device_delete_db(dev);
 635
 636                 if (udev_device_get_devnode(dev) == NULL) {
 637                         char devnode[UTIL_PATH_SIZE];
 638
 639                         info(event->udev, "'%s' not found in database, using kernel name '%s'\n",
 640                              udev_device_get_syspath(dev), udev_device_get_sysname(dev));
 641                         util_strlcpy(devnode, udev_get_dev_path(event->udev), sizeof(devnode));
 642                         util_strlcat(devnode, "/", sizeof(devnode));
 643                         util_strlcat(devnode, udev_device_get_sysname(dev), sizeof(devnode));
 644                         udev_device_set_devnode(dev, devnode);
 645                 }
 646
 647                 udev_rules_apply_to_event(rules, event);
 648                 if (event->ignore_device) {
 649                         info(event->udev, "device event will be ignored\n");
 650                         goto exit;
 651                 }
 652
 653                 if (udev_device_get_ignore_remove(dev)) {
 654                         info(event->udev, "ignore_remove for '%s'\n", udev_device_get_devnode(dev));
 655                         goto exit;
 656                 }
 657
 658                 err = udev_node_remove(dev, event->test);
 659                 goto exit;
 660         }
 661
 662         /* default devices */
 663         udev_rules_apply_to_event(rules, event);
 664         if (event->ignore_device)
 665                 info(event->udev, "device event will be ignored\n");
 666 exit:
 667         return err;
 668 }
 669
 670 int udev_event_execute_run(struct udev_event *event)
 671 {
 672         struct udev_list_entry *list_entry;
 673         int err = 0;
 674
 675         dbg(event->udev, "executing run list\n");
 676         udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
 677                 const char *cmd = udev_list_entry_get_name(list_entry);
 678
 679                 if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
 680                         struct udev_monitor *monitor;
 681
 682                         monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
 683                         if (monitor == NULL)
 684                                 continue;
 685                         udev_monitor_send_device(monitor, event->dev);
 686                         udev_monitor_unref(monitor);
 687                 } else {
 688                         char program[UTIL_PATH_SIZE];
 689                         char **envp;
 690
 691                         util_strlcpy(program, cmd, sizeof(program));
 692                         udev_event_apply_format(event, program, sizeof(program));
 693                         envp = udev_device_get_properties_envp(event->dev);
 694                         if (util_run_program(event->udev, program, envp, NULL, 0, NULL) != 0) {
 695                                 if (!udev_list_entry_get_flag(list_entry))
 696                                         err = -1;
 697                         }
 698                 }
 699         }
 700         return err;
 701 }