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
  41         event->dev = dev;
  42         event->udev = udev_device_get_udev(dev);
  43         udev_list_init(&event->run_list);
  44         event->mode = 0660;
  45         util_strlcpy(event->owner, "0", sizeof(event->owner));
  46         util_strlcpy(event->group, "0", sizeof(event->group));
  47
  48         dbg(event->udev, "allocated event %p\n", event);
  49         return event;
  50 }
  51
  52 void udev_event_unref(struct udev_event *event)
  53 {
  54         udev_list_cleanup_entries(event->udev, &event->run_list);
  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 /* handle "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */
  99 int udev_event_apply_subsys_kernel(struct udev_event *udev_event, const char *string,
 100                                    char *result, size_t maxsize, int read_value)
 101 {
 102         char temp[UTIL_PATH_SIZE];
 103         char *subsys;
 104         char *sysname;
 105         char *attr;
 106         struct udev_device *dev;
 107
 108         if (string == NULL)
 109                 string = result;
 110         if (string[0] != '[')
 111                 return -1;
 112
 113         util_strlcpy(temp, string, sizeof(temp));
 114
 115         subsys = &temp[1];
 116
 117         sysname = strchr(subsys, '/');
 118         if (sysname == NULL)
 119                 return -1;
 120         sysname[0] = '\0';
 121         sysname = &sysname[1];
 122
 123         attr = strchr(sysname, ']');
 124         if (attr == NULL)
 125                 return -1;
 126         attr[0] = '\0';
 127         attr = &attr[1];
 128         if (attr[0] == '/')
 129                 attr = &attr[1];
 130         if (attr[0] == '\0')
 131                 attr = NULL;
 132
 133         if (read_value && attr == NULL)
 134                 return -1;
 135
 136         dev = udev_device_new_from_subsystem_sysname(udev_event->udev, subsys, sysname);
 137         if (dev == NULL)
 138                 return -1;
 139
 140         if (read_value) {
 141                 const char *val;
 142
 143                 val = udev_device_get_sysattr_value(dev, attr);
 144                 if (val != NULL)
 145                         util_strlcpy(result, val, maxsize);
 146                 else
 147                         result[0] = '\0';
 148                 info(udev_event->udev, "value '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
 149         } else {
 150                 util_strlcpy(result, udev_device_get_syspath(dev), maxsize);
 151                 if (attr != NULL) {
 152                         util_strlcat(result, "/", maxsize);
 153                         util_strlcat(result, attr, maxsize);
 154                 }
 155                 info(udev_event->udev, "path '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
 156         }
 157         udev_device_unref(dev);
 158         return 0;
 159 }
 160
 161 void udev_event_apply_format(struct udev_event *event, char *string, size_t maxsize)
 162 {
 163         struct udev_device *dev = event->dev;
 164         char temp[UTIL_PATH_SIZE];
 165         char temp2[UTIL_PATH_SIZE];
 166         char *head, *tail, *cpos, *attr, *rest;
 167         int len;
 168         int i;
 169         int count;
 170         enum subst_type {
 171                 SUBST_UNKNOWN,
 172                 SUBST_DEVPATH,
 173                 SUBST_KERNEL,
 174                 SUBST_KERNEL_NUMBER,
 175                 SUBST_ID,
 176                 SUBST_DRIVER,
 177                 SUBST_MAJOR,
 178                 SUBST_MINOR,
 179                 SUBST_RESULT,
 180                 SUBST_ATTR,
 181                 SUBST_PARENT,
 182                 SUBST_TEMP_NODE,
 183                 SUBST_NAME,
 184                 SUBST_LINKS,
 185                 SUBST_ROOT,
 186                 SUBST_SYS,
 187                 SUBST_ENV,
 188         };
 189         static const struct subst_map {
 190                 char *name;
 191                 char fmt;
 192                 enum subst_type type;
 193         } map[] = {
 194                 { .name = "devpath",    .fmt = 'p',     .type = SUBST_DEVPATH },
 195                 { .name = "number",     .fmt = 'n',     .type = SUBST_KERNEL_NUMBER },
 196                 { .name = "kernel",     .fmt = 'k',     .type = SUBST_KERNEL },
 197                 { .name = "id",         .fmt = 'b',     .type = SUBST_ID },
 198                 { .name = "driver",     .fmt = 'd',     .type = SUBST_DRIVER },
 199                 { .name = "major",      .fmt = 'M',     .type = SUBST_MAJOR },
 200                 { .name = "minor",      .fmt = 'm',     .type = SUBST_MINOR },
 201                 { .name = "result",     .fmt = 'c',     .type = SUBST_RESULT },
 202                 { .name = "attr",       .fmt = 's',     .type = SUBST_ATTR },
 203                 { .name = "sysfs",      .fmt = 's',     .type = SUBST_ATTR },
 204                 { .name = "parent",     .fmt = 'P',     .type = SUBST_PARENT },
 205                 { .name = "tempnode",   .fmt = 'N',     .type = SUBST_TEMP_NODE },
 206                 { .name = "name",       .fmt = 'D',     .type = SUBST_NAME },
 207                 { .name = "links",      .fmt = 'L',     .type = SUBST_LINKS },
 208                 { .name = "root",       .fmt = 'r',     .type = SUBST_ROOT },
 209                 { .name = "sys",        .fmt = 'S',     .type = SUBST_SYS },
 210                 { .name = "env",        .fmt = 'E',     .type = SUBST_ENV },
 211                 { NULL, '\0', 0 }
 212         };
 213         enum subst_type type;
 214         const struct subst_map *subst;
 215
 216         head = string;
 217         while (1) {
 218                 len = -1;
 219                 while (head[0] != '\0') {
 220                         if (head[0] == '$') {
 221                                 /* substitute named variable */
 222                                 if (head[1] == '\0')
 223                                         break;
 224                                 if (head[1] == '$') {
 225                                         util_strlcpy(temp, head+2, sizeof(temp));
 226                                         util_strlcpy(head+1, temp, maxsize);
 227                                         head++;
 228                                         continue;
 229                                 }
 230                                 head[0] = '\0';
 231                                 for (subst = map; subst->name; subst++) {
 232                                         if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
 233                                                 type = subst->type;
 234                                                 tail = head + strlen(subst->name)+1;
 235                                                 dbg(event->udev, "will substitute format name '%s'\n", subst->name);
 236                                                 goto found;
 237                                         }
 238                                 }
 239                                 head[0] = '$';
 240                                 err(event->udev, "unknown format variable '%s'\n", head);
 241                         } else if (head[0] == '%') {
 242                                 /* substitute format char */
 243                                 if (head[1] == '\0')
 244                                         break;
 245                                 if (head[1] == '%') {
 246                                         util_strlcpy(temp, head+2, sizeof(temp));
 247                                         util_strlcpy(head+1, temp, maxsize);
 248                                         head++;
 249                                         continue;
 250                                 }
 251                                 head[0] = '\0';
 252                                 tail = head+1;
 253                                 len = get_format_len(event->udev, &tail);
 254                                 for (subst = map; subst->name; subst++) {
 255                                         if (tail[0] == subst->fmt) {
 256                                                 type = subst->type;
 257                                                 tail++;
 258                                                 dbg(event->udev, "will substitute format char '%c'\n", subst->fmt);
 259                                                 goto found;
 260                                         }
 261                                 }
 262                                 head[0] = '%';
 263                                 err(event->udev, "unknown format char '%c'\n", tail[0]);
 264                         }
 265                         head++;
 266                 }
 267                 break;
 268 found:
 269                 attr = get_format_attribute(event->udev, &tail);
 270                 util_strlcpy(temp, tail, sizeof(temp));
 271                 dbg(event->udev, "format=%i, string='%s', tail='%s'\n", type ,string, tail);
 272
 273                 switch (type) {
 274                 case SUBST_DEVPATH:
 275                         util_strlcat(string, udev_device_get_devpath(dev), maxsize);
 276                         dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
 277                         break;
 278                 case SUBST_KERNEL:
 279                         util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 280                         dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
 281                         break;
 282                 case SUBST_KERNEL_NUMBER:
 283                         if (udev_device_get_sysnum(dev) == NULL)
 284                                 break;
 285                         util_strlcat(string, udev_device_get_sysnum(dev), maxsize);
 286                         dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
 287                         break;
 288                 case SUBST_ID:
 289                         if (event->dev_parent != NULL) {
 290                                 util_strlcat(string, udev_device_get_sysname(event->dev_parent), maxsize);
 291                                 dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
 292                         }
 293                         break;
 294                 case SUBST_DRIVER:
 295                         if (event->dev_parent != NULL) {
 296                                 const char *driver = udev_device_get_driver(event->dev_parent);
 297
 298                                 if (driver == NULL)
 299                                         break;
 300                                 util_strlcat(string, driver, maxsize);
 301                                 dbg(event->udev, "substitute driver '%s'\n", driver);
 302                         }
 303                         break;
 304                 case SUBST_MAJOR:
 305                         sprintf(temp2, "%d", major(udev_device_get_devnum(dev)));
 306                         util_strlcat(string, temp2, maxsize);
 307                         dbg(event->udev, "substitute major number '%s'\n", temp2);
 308                         break;
 309                 case SUBST_MINOR:
 310                         sprintf(temp2, "%d", minor(udev_device_get_devnum(dev)));
 311                         util_strlcat(string, temp2, maxsize);
 312                         dbg(event->udev, "substitute minor number '%s'\n", temp2);
 313                         break;
 314                 case SUBST_RESULT:
 315                         if (event->program_result[0] == '\0')
 316                                 break;
 317                         /* get part part of the result string */
 318                         i = 0;
 319                         if (attr != NULL)
 320                                 i = strtoul(attr, &rest, 10);
 321                         if (i > 0) {
 322                                 dbg(event->udev, "request part #%d of result string\n", i);
 323                                 cpos = event->program_result;
 324                                 while (--i) {
 325                                         while (cpos[0] != '\0' && !isspace(cpos[0]))
 326                                                 cpos++;
 327                                         while (isspace(cpos[0]))
 328                                                 cpos++;
 329                                 }
 330                                 if (i > 0) {
 331                                         err(event->udev, "requested part of result string not found\n");
 332                                         break;
 333                                 }
 334                                 util_strlcpy(temp2, cpos, sizeof(temp2));
 335                                 /* %{2+}c copies the whole string from the second part on */
 336                                 if (rest[0] != '+') {
 337                                         cpos = strchr(temp2, ' ');
 338                                         if (cpos)
 339                                                 cpos[0] = '\0';
 340                                 }
 341                                 util_strlcat(string, temp2, maxsize);
 342                                 dbg(event->udev, "substitute part of result string '%s'\n", temp2);
 343                         } else {
 344                                 util_strlcat(string, event->program_result, maxsize);
 345                                 dbg(event->udev, "substitute result string '%s'\n", event->program_result);
 346                         }
 347                         break;
 348                 case SUBST_ATTR:
 349                         if (attr == NULL)
 350                                 err(event->udev, "missing file parameter for attr\n");
 351                         else {
 352                                 char value[UTIL_NAME_SIZE] = "";
 353                                 size_t size;
 354
 355                                 udev_event_apply_subsys_kernel(event, attr, value, sizeof(value), 1);
 356
 357                                 /* try the current device, other matches may have selected */
 358                                 if (value[0] == '\0' && event->dev_parent != NULL && event->dev_parent != event->dev) {
 359                                         const char *val;
 360
 361                                         val = udev_device_get_sysattr_value(event->dev_parent, attr);
 362                                         if (val != NULL)
 363                                                 util_strlcpy(value, val, sizeof(value));
 364                                 }
 365
 366                                 /* look at all devices along the chain of parents */
 367                                 if (value[0] == '\0') {
 368                                         struct udev_device *dev_parent = dev;
 369                                         const char *val;
 370
 371                                         do {
 372                                                 dbg(event->udev, "looking at '%s'\n", udev_device_get_syspath(dev_parent));
 373                                                 val = udev_device_get_sysattr_value(dev_parent, attr);
 374                                                 if (val != NULL) {
 375                                                         util_strlcpy(value, val, sizeof(value));
 376                                                         break;
 377                                                 }
 378                                                 dev_parent = udev_device_get_parent(dev_parent);
 379                                         } while (dev_parent != NULL);
 380                                 }
 381
 382                                 if (value[0]=='\0')
 383                                         break;
 384
 385                                 /* strip trailing whitespace, and replace unwanted characters */
 386                                 size = strlen(value);
 387                                 while (size > 0 && isspace(value[--size]))
 388                                         value[size] = '\0';
 389                                 count = util_replace_chars(value, ALLOWED_CHARS_INPUT);
 390                                 if (count > 0)
 391                                         info(event->udev, "%i character(s) replaced\n" , count);
 392                                 util_strlcat(string, value, maxsize);
 393                                 dbg(event->udev, "substitute sysfs value '%s'\n", value);
 394                         }
 395                         break;
 396                 case SUBST_PARENT:
 397                         {
 398                                 struct udev_device *dev_parent;
 399                                 const char *devnode;
 400
 401                                 dev_parent = udev_device_get_parent(event->dev);
 402                                 if (dev_parent == NULL)
 403                                         break;
 404                                 devnode = udev_device_get_devnode(dev_parent);
 405                                 if (devnode != NULL) {
 406                                         size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
 407
 408                                         util_strlcat(string, &devnode[devlen], maxsize);
 409                                         dbg(event->udev, "found parent '%s', got node name '%s'\n",
 410                                             udev_device_get_syspath(dev_parent), &devnode[devlen]);
 411                                 }
 412                         }
 413                         break;
 414                 case SUBST_TEMP_NODE:
 415                         if (event->tmp_node[0] == '\0' && major(udev_device_get_devnum(dev)) > 0) {
 416                                 dbg(event->udev, "create temporary device node for callout\n");
 417                                 snprintf(event->tmp_node, sizeof(event->tmp_node), "%s/.tmp-%u-%u",
 418                                          udev_get_dev_path(event->udev),
 419                                          major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)));
 420                                 udev_node_mknod(dev, event->tmp_node, makedev(0,0), 0600, 0, 0);
 421                         }
 422                         util_strlcat(string, event->tmp_node, maxsize);
 423                         dbg(event->udev, "substitute temporary device node name '%s'\n", event->tmp_node);
 424                         break;
 425                 case SUBST_NAME:
 426                         if (event->name != NULL) {
 427                                 util_strlcat(string, event->name, maxsize);
 428                                 dbg(event->udev, "substitute name '%s'\n", event->name);
 429                         } else {
 430                                 util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 431                                 dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
 432                         }
 433                         break;
 434                 case SUBST_LINKS:
 435                         {
 436                                 struct udev_list_entry *list_entry;
 437
 438                                 list_entry = udev_device_get_properties_list_entry(dev);
 439                                 util_strlcpy(string, udev_list_entry_get_name(list_entry), maxsize);
 440                                 udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
 441                                         util_strlcat(string, " ", maxsize);
 442                                         util_strlcat(string, udev_list_entry_get_name(list_entry), maxsize);
 443                                 }
 444                         }
 445                         break;
 446                 case SUBST_ROOT:
 447                         util_strlcat(string, udev_get_dev_path(event->udev), maxsize);
 448                         dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
 449                         break;
 450                 case SUBST_SYS:
 451                         util_strlcat(string, udev_get_sys_path(event->udev), maxsize);
 452                         dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
 453                         break;
 454                 case SUBST_ENV:
 455                         if (attr == NULL) {
 456                                 dbg(event->udev, "missing attribute\n");
 457                                 break;
 458                         } else {
 459                                 struct udev_list_entry *list_entry;
 460                                 const char *value;
 461
 462                                 list_entry = udev_device_get_properties_list_entry(event->dev);
 463                                 list_entry = udev_list_entry_get_by_name(list_entry, attr);
 464                                 if (list_entry == NULL)
 465                                         break;
 466                                 value = udev_list_entry_get_value(list_entry);
 467                                 dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
 468                                 util_strlcat(string, value, maxsize);
 469                                 break;
 470                         }
 471                 default:
 472                         err(event->udev, "unknown substitution type=%i\n", type);
 473                         break;
 474                 }
 475                 /* possibly truncate to format-char specified length */
 476                 if (len >= 0 && len < (int)strlen(head)) {
 477                         head[len] = '\0';
 478                         dbg(event->udev, "truncate to %i chars, subtitution string becomes '%s'\n", len, head);
 479                 }
 480                 util_strlcat(string, temp, maxsize);
 481         }
 482 }
 483
 484 static void rename_netif_kernel_log(struct ifreq ifr)
 485 {
 486         int klog;
 487         FILE *f;
 488
 489         klog = open("/dev/kmsg", O_WRONLY);
 490         if (klog < 0)
 491                 return;
 492
 493         f = fdopen(klog, "w");
 494         if (f == NULL) {
 495                 close(klog);
 496                 return;
 497         }
 498
 499         fprintf(f, "<6>udev: renamed network interface %s to %s\n",
 500                 ifr.ifr_name, ifr.ifr_newname);
 501         fclose(f);
 502 }
 503
 504 static int rename_netif(struct udev_event *event)
 505 {
 506         struct udev_device *dev = event->dev;
 507         int sk;
 508         struct ifreq ifr;
 509         int err;
 510
 511         info(event->udev, "changing net interface name from '%s' to '%s'\n",
 512              udev_device_get_sysname(dev), event->name);
 513         if (event->test)
 514                 return 0;
 515
 516         sk = socket(PF_INET, SOCK_DGRAM, 0);
 517         if (sk < 0) {
 518                 err(event->udev, "error opening socket: %m\n");
 519                 return -1;
 520         }
 521
 522         memset(&ifr, 0x00, sizeof(struct ifreq));
 523         util_strlcpy(ifr.ifr_name, udev_device_get_sysname(dev), IFNAMSIZ);
 524         util_strlcpy(ifr.ifr_newname, event->name, IFNAMSIZ);
 525         err = ioctl(sk, SIOCSIFNAME, &ifr);
 526         if (err == 0)
 527                 rename_netif_kernel_log(ifr);
 528         else {
 529                 int loop;
 530
 531                 /* see if the destination interface name already exists */
 532                 if (errno != EEXIST) {
 533                         err(event->udev, "error changing netif name %s to %s: %m\n",
 534                             ifr.ifr_name, ifr.ifr_newname);
 535                         goto exit;
 536                 }
 537
 538                 /* free our own name, another process may wait for us */
 539                 util_strlcpy(ifr.ifr_newname, udev_device_get_sysname(dev), IFNAMSIZ);
 540                 util_strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
 541                 err = ioctl(sk, SIOCSIFNAME, &ifr);
 542                 if (err != 0) {
 543                         err(event->udev, "error changing netif name %s to %s: %m\n",
 544                             ifr.ifr_name, ifr.ifr_newname);
 545                         goto exit;
 546                 }
 547
 548                 /* wait 30 seconds for our target to become available */
 549                 util_strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
 550                 util_strlcpy(ifr.ifr_newname, udev_device_get_devnode(dev), IFNAMSIZ);
 551                 loop = 30 * 20;
 552                 while (loop--) {
 553                         err = ioctl(sk, SIOCSIFNAME, &ifr);
 554                         if (err == 0) {
 555                                 rename_netif_kernel_log(ifr);
 556                                 break;
 557                         }
 558
 559                         if (errno != EEXIST) {
 560                                 err(event->udev, "error changing net interface name %s to %s: %m\n",
 561                                     ifr.ifr_name, ifr.ifr_newname);
 562                                 break;
 563                         }
 564                         dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
 565                             udev_device_get_devnode(dev), (30 * 20) - loop);
 566                         usleep(1000 * 1000 / 20);
 567                 }
 568         }
 569 exit:
 570         close(sk);
 571         return err;
 572 }
 573
 574 int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules)
 575 {
 576         struct udev_device *dev = event->dev;
 577         int err = 0;
 578
 579         if (udev_device_get_devpath_old(dev) != NULL) {
 580                 if (udev_device_rename_db(dev, udev_device_get_devpath(dev)) == 0)
 581                         info(event->udev, "moved database from '%s' to '%s'\n",
 582                              udev_device_get_devpath_old(dev), udev_device_get_devpath(dev));
 583         }
 584
 585         /* add device node */
 586         if (major(udev_device_get_devnum(dev)) != 0 &&
 587             (strcmp(udev_device_get_action(dev), "add") == 0 || strcmp(udev_device_get_action(dev), "change") == 0)) {
 588                 char filename[UTIL_PATH_SIZE];
 589                 struct udev_device *dev_old;
 590
 591                 dbg(event->udev, "device node add '%s'\n", udev_device_get_devpath(dev));
 592
 593                 udev_rules_get_name(rules, event);
 594                 if (event->ignore_device) {
 595                         info(event->udev, "device event will be ignored\n");
 596                         goto exit;
 597                 }
 598
 599                 if (event->name[0] == '\0') {
 600                         info(event->udev, "device node creation supressed\n");
 601                         goto exit;
 602                 }
 603
 604                 /* set device node name */
 605                 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
 606                 util_strlcat(filename, "/", sizeof(filename));
 607                 util_strlcat(filename, event->name, sizeof(filename));
 608                 udev_device_set_devnode(dev, filename);
 609
 610                 /* read current database entry; cleanup, if it is known device */
 611                 dev_old = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
 612                 if (dev_old != NULL) {
 613                         info(event->udev, "device '%s' already in database, updating\n",
 614                              udev_device_get_devpath(dev));
 615                         udev_node_update_old_links(dev, dev_old, event->test);
 616                         udev_device_unref(dev_old);
 617                 }
 618
 619                 udev_device_update_db(dev);
 620
 621                 err = udev_node_add(dev, event->mode, event->owner, event->group, event->test);
 622                 if (err != 0)
 623                         goto exit;
 624
 625                 goto exit;
 626         }
 627
 628         /* add netif */
 629         if (strcmp(udev_device_get_subsystem(dev), "net") == 0 && strcmp(udev_device_get_action(dev), "add") == 0) {
 630                 dbg(event->udev, "netif add '%s'\n", udev_device_get_devpath(dev));
 631
 632                 udev_rules_get_name(rules, event);
 633                 if (event->ignore_device) {
 634                         info(event->udev, "device event will be ignored\n");
 635                         goto exit;
 636                 }
 637                 if (event->name[0] == '\0') {
 638                         info(event->udev, "device renaming supressed\n");
 639                         goto exit;
 640                 }
 641
 642                 /* look if we want to change the name of the netif */
 643                 if (strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
 644                         char syspath[UTIL_PATH_SIZE];
 645                         char *pos;
 646
 647                         err = rename_netif(event);
 648                         if (err != 0)
 649                                 goto exit;
 650                         info(event->udev, "renamed netif to '%s'\n", event->name);
 651
 652                         /* remember old name */
 653                         udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
 654
 655                         /* now change the devpath, because the kernel device name has changed */
 656                         util_strlcpy(syspath, udev_device_get_syspath(dev), sizeof(syspath));
 657                         pos = strrchr(syspath, '/');
 658                         if (pos != NULL) {
 659                                 pos[1] = '\0';
 660                                 util_strlcat(syspath, event->name, sizeof(syspath));
 661                                 udev_device_set_syspath(event->dev, syspath);
 662                                 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
 663                                 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
 664                         }
 665                 }
 666                 goto exit;
 667         }
 668
 669         /* remove device node */
 670         if (major(udev_device_get_devnum(dev)) != 0 && strcmp(udev_device_get_action(dev), "remove") == 0) {
 671                 /* import database entry and delete it */
 672                 udev_device_read_db(dev);
 673                 if (!event->test)
 674                         udev_device_delete_db(dev);
 675
 676                 if (udev_device_get_devnode(dev) == NULL) {
 677                         char devnode[UTIL_PATH_SIZE];
 678
 679                         info(event->udev, "'%s' not found in database, using kernel name '%s'\n",
 680                              udev_device_get_syspath(dev), udev_device_get_sysname(dev));
 681                         util_strlcpy(devnode, udev_get_dev_path(event->udev), sizeof(devnode));
 682                         util_strlcat(devnode, "/", sizeof(devnode));
 683                         util_strlcat(devnode, udev_device_get_sysname(dev), sizeof(devnode));
 684                         udev_device_set_devnode(dev, devnode);
 685                 }
 686
 687                 udev_rules_get_run(rules, event);
 688                 if (event->ignore_device) {
 689                         info(event->udev, "device event will be ignored\n");
 690                         goto exit;
 691                 }
 692
 693                 if (udev_device_get_ignore_remove(dev)) {
 694                         info(event->udev, "ignore_remove for '%s'\n", udev_device_get_devnode(dev));
 695                         goto exit;
 696                 }
 697
 698                 err = udev_node_remove(dev, event->test);
 699                 goto exit;
 700         }
 701
 702         /* default devices */
 703         udev_rules_get_run(rules, event);
 704         if (event->ignore_device)
 705                 info(event->udev, "device event will be ignored\n");
 706 exit:
 707         return err;
 708 }
 709
 710 int udev_event_execute_run(struct udev_event *event)
 711 {
 712         struct udev_list_entry *list_entry;
 713         int err = 0;
 714
 715         dbg(event->udev, "executing run list\n");
 716         udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
 717                 const char *cmd = udev_list_entry_get_name(list_entry);
 718
 719                 if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
 720                         struct udev_monitor *monitor;
 721
 722                         monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
 723                         if (monitor == NULL)
 724                                 continue;
 725                         udev_monitor_send_device(monitor, event->dev);
 726                         udev_monitor_unref(monitor);
 727                 } else {
 728                         char program[UTIL_PATH_SIZE];
 729                         char **envp;
 730
 731                         util_strlcpy(program, cmd, sizeof(program));
 732                         udev_event_apply_format(event, program, sizeof(program));
 733                         envp = udev_device_get_properties_envp(event->dev);
 734                         if (util_run_program(event->udev, program, envp, NULL, 0, NULL) != 0) {
 735                                 if (!udev_list_entry_get_flag(list_entry))
 736                                         err = -1;
 737                         }
 738                 }
 739         }
 740         return err;
 741 }