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 = malloc(sizeof(struct udev_event));
  38         if (event == NULL)
  39                 return NULL;
  40         memset(event, 0x00, sizeof(struct udev_event));
  41
  42         event->dev = dev;
  43         event->udev = udev_device_get_udev(dev);
  44         udev_list_init(&event->run_list);
  45         event->mode = 0660;
  46         util_strlcpy(event->owner, "0", sizeof(event->owner));
  47         util_strlcpy(event->group, "0", sizeof(event->group));
  48
  49         dbg(event->udev, "allocated event %p\n", event);
  50         return event;
  51 }
  52
  53 void udev_event_unref(struct udev_event *event)
  54 {
  55         udev_list_cleanup_entries(event->udev, &event->run_list);
  56         dbg(event->udev, "free event %p\n", event);
  57         free(event);
  58 }
  59
  60 /* extract possible {attr} and move str behind it */
  61 static char *get_format_attribute(struct udev *udev, char **str)
  62 {
  63         char *pos;
  64         char *attr = NULL;
  65
  66         if (*str[0] == '{') {
  67                 pos = strchr(*str, '}');
  68                 if (pos == NULL) {
  69                         err(udev, "missing closing brace for format\n");
  70                         return NULL;
  71                 }
  72                 pos[0] = '\0';
  73                 attr = *str+1;
  74                 *str = pos+1;
  75                 dbg(udev, "attribute='%s', str='%s'\n", attr, *str);
  76         }
  77         return attr;
  78 }
  79
  80 /* extract possible format length and move str behind it*/
  81 static int get_format_len(struct udev *udev, char **str)
  82 {
  83         int num;
  84         char *tail;
  85
  86         if (isdigit(*str[0])) {
  87                 num = (int) strtoul(*str, &tail, 10);
  88                 if (num > 0) {
  89                         *str = tail;
  90                         dbg(udev, "format length=%i\n", num);
  91                         return num;
  92                 } else {
  93                         err(udev, "format parsing error '%s'\n", *str);
  94                 }
  95         }
  96         return -1;
  97 }
  98
  99 /* handle "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */
 100 int udev_event_apply_subsys_kernel(struct udev_event *udev_event, const char *string,
 101                                    char *result, size_t maxsize, int read_value)
 102 {
 103         char temp[UTIL_PATH_SIZE];
 104         char *subsys;
 105         char *sysname;
 106         char *attr;
 107         struct udev_device *dev;
 108
 109         if (string == NULL)
 110                 string = result;
 111         if (string[0] != '[')
 112                 return -1;
 113
 114         util_strlcpy(temp, string, sizeof(temp));
 115
 116         subsys = &temp[1];
 117
 118         sysname = strchr(subsys, '/');
 119         if (sysname == NULL)
 120                 return -1;
 121         sysname[0] = '\0';
 122         sysname = &sysname[1];
 123
 124         attr = strchr(sysname, ']');
 125         if (attr == NULL)
 126                 return -1;
 127         attr[0] = '\0';
 128         attr = &attr[1];
 129         if (attr[0] == '/')
 130                 attr = &attr[1];
 131         if (attr[0] == '\0')
 132                 attr = NULL;
 133
 134         if (read_value && attr == NULL)
 135                 return -1;
 136
 137         dev = udev_device_new_from_subsystem_sysname(udev_event->udev, subsys, sysname);
 138         if (dev == NULL)
 139                 return -1;
 140
 141         if (read_value) {
 142                 const char *val;
 143
 144                 val = udev_device_get_attr_value(dev, attr);
 145                 if (val != NULL)
 146                         util_strlcpy(result, val, maxsize);
 147                 else
 148                         result[0] = '\0';
 149                 info(udev_event->udev, "value '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
 150         } else {
 151                 util_strlcpy(result, udev_device_get_syspath(dev), maxsize);
 152                 if (attr != NULL) {
 153                         util_strlcat(result, "/", maxsize);
 154                         util_strlcat(result, attr, maxsize);
 155                 }
 156                 info(udev_event->udev, "path '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
 157         }
 158         udev_device_unref(dev);
 159         return 0;
 160 }
 161
 162 void udev_event_apply_format(struct udev_event *event, char *string, size_t maxsize)
 163 {
 164         struct udev_device *dev = event->dev;
 165         char temp[UTIL_PATH_SIZE];
 166         char temp2[UTIL_PATH_SIZE];
 167         char *head, *tail, *cpos, *attr, *rest;
 168         int len;
 169         int i;
 170         int count;
 171         enum subst_type {
 172                 SUBST_UNKNOWN,
 173                 SUBST_DEVPATH,
 174                 SUBST_KERNEL,
 175                 SUBST_KERNEL_NUMBER,
 176                 SUBST_ID,
 177                 SUBST_DRIVER,
 178                 SUBST_MAJOR,
 179                 SUBST_MINOR,
 180                 SUBST_RESULT,
 181                 SUBST_ATTR,
 182                 SUBST_PARENT,
 183                 SUBST_TEMP_NODE,
 184                 SUBST_NAME,
 185                 SUBST_LINKS,
 186                 SUBST_ROOT,
 187                 SUBST_SYS,
 188                 SUBST_ENV,
 189         };
 190         static const struct subst_map {
 191                 char *name;
 192                 char fmt;
 193                 enum subst_type type;
 194         } map[] = {
 195                 { .name = "devpath",    .fmt = 'p',     .type = SUBST_DEVPATH },
 196                 { .name = "number",     .fmt = 'n',     .type = SUBST_KERNEL_NUMBER },
 197                 { .name = "kernel",     .fmt = 'k',     .type = SUBST_KERNEL },
 198                 { .name = "id",         .fmt = 'b',     .type = SUBST_ID },
 199                 { .name = "driver",     .fmt = 'd',     .type = SUBST_DRIVER },
 200                 { .name = "major",      .fmt = 'M',     .type = SUBST_MAJOR },
 201                 { .name = "minor",      .fmt = 'm',     .type = SUBST_MINOR },
 202                 { .name = "result",     .fmt = 'c',     .type = SUBST_RESULT },
 203                 { .name = "attr",       .fmt = 's',     .type = SUBST_ATTR },
 204                 { .name = "sysfs",      .fmt = 's',     .type = SUBST_ATTR },
 205                 { .name = "parent",     .fmt = 'P',     .type = SUBST_PARENT },
 206                 { .name = "tempnode",   .fmt = 'N',     .type = SUBST_TEMP_NODE },
 207                 { .name = "name",       .fmt = 'D',     .type = SUBST_NAME },
 208                 { .name = "links",      .fmt = 'L',     .type = SUBST_LINKS },
 209                 { .name = "root",       .fmt = 'r',     .type = SUBST_ROOT },
 210                 { .name = "sys",        .fmt = 'S',     .type = SUBST_SYS },
 211                 { .name = "env",        .fmt = 'E',     .type = SUBST_ENV },
 212                 { NULL, '\0', 0 }
 213         };
 214         enum subst_type type;
 215         const struct subst_map *subst;
 216
 217         head = string;
 218         while (1) {
 219                 len = -1;
 220                 while (head[0] != '\0') {
 221                         if (head[0] == '$') {
 222                                 /* substitute named variable */
 223                                 if (head[1] == '\0')
 224                                         break;
 225                                 if (head[1] == '$') {
 226                                         util_strlcpy(temp, head+2, sizeof(temp));
 227                                         util_strlcpy(head+1, temp, maxsize);
 228                                         head++;
 229                                         continue;
 230                                 }
 231                                 head[0] = '\0';
 232                                 for (subst = map; subst->name; subst++) {
 233                                         if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
 234                                                 type = subst->type;
 235                                                 tail = head + strlen(subst->name)+1;
 236                                                 dbg(event->udev, "will substitute format name '%s'\n", subst->name);
 237                                                 goto found;
 238                                         }
 239                                 }
 240                                 head[0] = '$';
 241                                 err(event->udev, "unknown format variable '%s'\n", head);
 242                         } else if (head[0] == '%') {
 243                                 /* substitute format char */
 244                                 if (head[1] == '\0')
 245                                         break;
 246                                 if (head[1] == '%') {
 247                                         util_strlcpy(temp, head+2, sizeof(temp));
 248                                         util_strlcpy(head+1, temp, maxsize);
 249                                         head++;
 250                                         continue;
 251                                 }
 252                                 head[0] = '\0';
 253                                 tail = head+1;
 254                                 len = get_format_len(event->udev, &tail);
 255                                 for (subst = map; subst->name; subst++) {
 256                                         if (tail[0] == subst->fmt) {
 257                                                 type = subst->type;
 258                                                 tail++;
 259                                                 dbg(event->udev, "will substitute format char '%c'\n", subst->fmt);
 260                                                 goto found;
 261                                         }
 262                                 }
 263                                 head[0] = '%';
 264                                 err(event->udev, "unknown format char '%c'\n", tail[0]);
 265                         }
 266                         head++;
 267                 }
 268                 break;
 269 found:
 270                 attr = get_format_attribute(event->udev, &tail);
 271                 util_strlcpy(temp, tail, sizeof(temp));
 272                 dbg(event->udev, "format=%i, string='%s', tail='%s'\n", type ,string, tail);
 273
 274                 switch (type) {
 275                 case SUBST_DEVPATH:
 276                         util_strlcat(string, udev_device_get_devpath(dev), maxsize);
 277                         dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
 278                         break;
 279                 case SUBST_KERNEL:
 280                         util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 281                         dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
 282                         break;
 283                 case SUBST_KERNEL_NUMBER:
 284                         if (udev_device_get_sysnum(dev) == NULL)
 285                                 break;
 286                         util_strlcat(string, udev_device_get_sysnum(dev), maxsize);
 287                         dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
 288                         break;
 289                 case SUBST_ID:
 290                         if (event->dev_parent != NULL) {
 291                                 util_strlcat(string, udev_device_get_sysname(event->dev_parent), maxsize);
 292                                 dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
 293                         }
 294                         break;
 295                 case SUBST_DRIVER:
 296                         if (event->dev_parent != NULL) {
 297                                 const char *driver = udev_device_get_driver(event->dev_parent);
 298
 299                                 if (driver == NULL)
 300                                         break;
 301                                 util_strlcat(string, driver, maxsize);
 302                                 dbg(event->udev, "substitute driver '%s'\n", driver);
 303                         }
 304                         break;
 305                 case SUBST_MAJOR:
 306                         sprintf(temp2, "%d", major(udev_device_get_devnum(dev)));
 307                         util_strlcat(string, temp2, maxsize);
 308                         dbg(event->udev, "substitute major number '%s'\n", temp2);
 309                         break;
 310                 case SUBST_MINOR:
 311                         sprintf(temp2, "%d", minor(udev_device_get_devnum(dev)));
 312                         util_strlcat(string, temp2, maxsize);
 313                         dbg(event->udev, "substitute minor number '%s'\n", temp2);
 314                         break;
 315                 case SUBST_RESULT:
 316                         if (event->program_result[0] == '\0')
 317                                 break;
 318                         /* get part part of the result string */
 319                         i = 0;
 320                         if (attr != NULL)
 321                                 i = strtoul(attr, &rest, 10);
 322                         if (i > 0) {
 323                                 dbg(event->udev, "request part #%d of result string\n", i);
 324                                 cpos = event->program_result;
 325                                 while (--i) {
 326                                         while (cpos[0] != '\0' && !isspace(cpos[0]))
 327                                                 cpos++;
 328                                         while (isspace(cpos[0]))
 329                                                 cpos++;
 330                                 }
 331                                 if (i > 0) {
 332                                         err(event->udev, "requested part of result string not found\n");
 333                                         break;
 334                                 }
 335                                 util_strlcpy(temp2, cpos, sizeof(temp2));
 336                                 /* %{2+}c copies the whole string from the second part on */
 337                                 if (rest[0] != '+') {
 338                                         cpos = strchr(temp2, ' ');
 339                                         if (cpos)
 340                                                 cpos[0] = '\0';
 341                                 }
 342                                 util_strlcat(string, temp2, maxsize);
 343                                 dbg(event->udev, "substitute part of result string '%s'\n", temp2);
 344                         } else {
 345                                 util_strlcat(string, event->program_result, maxsize);
 346                                 dbg(event->udev, "substitute result string '%s'\n", event->program_result);
 347                         }
 348                         break;
 349                 case SUBST_ATTR:
 350                         if (attr == NULL)
 351                                 err(event->udev, "missing file parameter for attr\n");
 352                         else {
 353                                 char value[UTIL_NAME_SIZE] = "";
 354                                 size_t size;
 355
 356                                 udev_event_apply_subsys_kernel(event, attr, value, sizeof(value), 1);
 357
 358                                 /* try the current device, other matches may have selected */
 359                                 if (value[0] == '\0' && event->dev_parent != NULL && event->dev_parent != event->dev) {
 360                                         const char *val;
 361
 362                                         val = udev_device_get_attr_value(event->dev_parent, attr);
 363                                         if (val != NULL)
 364                                                 util_strlcpy(value, val, sizeof(value));
 365                                 }
 366
 367                                 /* look at all devices along the chain of parents */
 368                                 if (value[0] == '\0') {
 369                                         struct udev_device *dev_parent = dev;
 370                                         const char *val;
 371
 372                                         do {
 373                                                 dbg(event->udev, "looking at '%s'\n", udev_device_get_syspath(dev_parent));
 374                                                 val = udev_device_get_attr_value(dev_parent, attr);
 375                                                 if (val != NULL) {
 376                                                         util_strlcpy(value, val, sizeof(value));
 377                                                         break;
 378                                                 }
 379                                                 dev_parent = udev_device_get_parent(dev_parent);
 380                                         } while (dev_parent != NULL);
 381                                 }
 382
 383                                 if (value[0]=='\0')
 384                                         break;
 385
 386                                 /* strip trailing whitespace, and replace unwanted characters */
 387                                 size = strlen(value);
 388                                 while (size > 0 && isspace(value[--size]))
 389                                         value[size] = '\0';
 390                                 count = util_replace_chars(value, ALLOWED_CHARS_INPUT);
 391                                 if (count > 0)
 392                                         info(event->udev, "%i character(s) replaced\n" , count);
 393                                 util_strlcat(string, value, maxsize);
 394                                 dbg(event->udev, "substitute sysfs value '%s'\n", value);
 395                         }
 396                         break;
 397                 case SUBST_PARENT:
 398                         {
 399                                 struct udev_device *dev_parent;
 400                                 const char *devnode;
 401
 402                                 dev_parent = udev_device_get_parent(event->dev);
 403                                 if (dev_parent == NULL)
 404                                         break;
 405                                 devnode = udev_device_get_devnode(dev_parent);
 406                                 if (devnode != NULL) {
 407                                         size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
 408
 409                                         util_strlcat(string, &devnode[devlen], maxsize);
 410                                         dbg(event->udev, "found parent '%s', got node name '%s'\n",
 411                                             udev_device_get_syspath(dev_parent), &devnode[devlen]);
 412                                 }
 413                         }
 414                         break;
 415                 case SUBST_TEMP_NODE:
 416                         if (event->tmp_node[0] == '\0' && major(udev_device_get_devnum(dev)) > 0) {
 417                                 dbg(event->udev, "create temporary device node for callout\n");
 418                                 snprintf(event->tmp_node, sizeof(event->tmp_node), "%s/.tmp-%u-%u",
 419                                          udev_get_dev_path(event->udev),
 420                                          major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)));
 421                                 udev_node_mknod(dev, event->tmp_node, makedev(0,0), 0600, 0, 0);
 422                         }
 423                         util_strlcat(string, event->tmp_node, maxsize);
 424                         dbg(event->udev, "substitute temporary device node name '%s'\n", event->tmp_node);
 425                         break;
 426                 case SUBST_NAME:
 427                         if (event->name != NULL) {
 428                                 util_strlcat(string, event->name, maxsize);
 429                                 dbg(event->udev, "substitute name '%s'\n", event->name);
 430                         } else {
 431                                 util_strlcat(string, udev_device_get_sysname(dev), maxsize);
 432                                 dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
 433                         }
 434                         break;
 435                 case SUBST_LINKS:
 436                         {
 437                                 struct udev_list_entry *list_entry;
 438
 439                                 list_entry = udev_device_get_properties_list_entry(dev);
 440                                 util_strlcpy(string, udev_list_entry_get_name(list_entry), maxsize);
 441                                 udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
 442                                         util_strlcat(string, " ", maxsize);
 443                                         util_strlcat(string, udev_list_entry_get_name(list_entry), maxsize);
 444                                 }
 445                         }
 446                         break;
 447                 case SUBST_ROOT:
 448                         util_strlcat(string, udev_get_dev_path(event->udev), maxsize);
 449                         dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
 450                         break;
 451                 case SUBST_SYS:
 452                         util_strlcat(string, udev_get_sys_path(event->udev), maxsize);
 453                         dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
 454                         break;
 455                 case SUBST_ENV:
 456                         if (attr == NULL) {
 457                                 dbg(event->udev, "missing attribute\n");
 458                                 break;
 459                         } else {
 460                                 struct udev_list_entry *list_entry;
 461                                 const char *value;
 462
 463                                 list_entry = udev_device_get_properties_list_entry(event->dev);
 464                                 list_entry = udev_list_entry_get_by_name(list_entry, attr);
 465                                 if (list_entry == NULL)
 466                                         break;
 467                                 value = udev_list_entry_get_value(list_entry);
 468                                 dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
 469                                 util_strlcat(string, value, maxsize);
 470                                 break;
 471                         }
 472                 default:
 473                         err(event->udev, "unknown substitution type=%i\n", type);
 474                         break;
 475                 }
 476                 /* possibly truncate to format-char specified length */
 477                 if (len >= 0 && len < (int)strlen(head)) {
 478                         head[len] = '\0';
 479                         dbg(event->udev, "truncate to %i chars, subtitution string becomes '%s'\n", len, head);
 480                 }
 481                 util_strlcat(string, temp, maxsize);
 482         }
 483 }
 484
 485 static void rename_netif_kernel_log(struct ifreq ifr)
 486 {
 487         int klog;
 488         FILE *f;
 489
 490         klog = open("/dev/kmsg", O_WRONLY);
 491         if (klog < 0)
 492                 return;
 493
 494         f = fdopen(klog, "w");
 495         if (f == NULL) {
 496                 close(klog);
 497                 return;
 498         }
 499
 500         fprintf(f, "<6>udev: renamed network interface %s to %s\n",
 501                 ifr.ifr_name, ifr.ifr_newname);
 502         fclose(f);
 503 }
 504
 505 static int rename_netif(struct udev_event *event)
 506 {
 507         struct udev_device *dev = event->dev;
 508         int sk;
 509         struct ifreq ifr;
 510         int err;
 511
 512         info(event->udev, "changing net interface name from '%s' to '%s'\n",
 513              udev_device_get_sysname(dev), event->name);
 514         if (event->test)
 515                 return 0;
 516
 517         sk = socket(PF_INET, SOCK_DGRAM, 0);
 518         if (sk < 0) {
 519                 err(event->udev, "error opening socket: %m\n");
 520                 return -1;
 521         }
 522
 523         memset(&ifr, 0x00, sizeof(struct ifreq));
 524         util_strlcpy(ifr.ifr_name, udev_device_get_sysname(dev), IFNAMSIZ);
 525         util_strlcpy(ifr.ifr_newname, event->name, IFNAMSIZ);
 526         err = ioctl(sk, SIOCSIFNAME, &ifr);
 527         if (err == 0)
 528                 rename_netif_kernel_log(ifr);
 529         else {
 530                 int loop;
 531
 532                 /* see if the destination interface name already exists */
 533                 if (errno != EEXIST) {
 534                         err(event->udev, "error changing netif name %s to %s: %m\n",
 535                             ifr.ifr_name, ifr.ifr_newname);
 536                         goto exit;
 537                 }
 538
 539                 /* free our own name, another process may wait for us */
 540                 util_strlcpy(ifr.ifr_newname, udev_device_get_sysname(dev), IFNAMSIZ);
 541                 util_strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
 542                 err = ioctl(sk, SIOCSIFNAME, &ifr);
 543                 if (err != 0) {
 544                         err(event->udev, "error changing netif name %s to %s: %m\n",
 545                             ifr.ifr_name, ifr.ifr_newname);
 546                         goto exit;
 547                 }
 548
 549                 /* wait 30 seconds for our target to become available */
 550                 util_strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
 551                 util_strlcpy(ifr.ifr_newname, udev_device_get_devnode(dev), IFNAMSIZ);
 552                 loop = 30 * 20;
 553                 while (loop--) {
 554                         err = ioctl(sk, SIOCSIFNAME, &ifr);
 555                         if (err == 0) {
 556                                 rename_netif_kernel_log(ifr);
 557                                 break;
 558                         }
 559
 560                         if (errno != EEXIST) {
 561                                 err(event->udev, "error changing net interface name %s to %s: %m\n",
 562                                     ifr.ifr_name, ifr.ifr_newname);
 563                                 break;
 564                         }
 565                         dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
 566                             udev_device_get_devnode(dev), (30 * 20) - loop);
 567                         usleep(1000 * 1000 / 20);
 568                 }
 569         }
 570 exit:
 571         close(sk);
 572         return err;
 573 }
 574
 575 int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules)
 576 {
 577         struct udev_device *dev = event->dev;
 578         int err = 0;
 579
 580         if (udev_device_get_devpath_old(dev) != NULL) {
 581                 if (udev_device_rename_db(dev, udev_device_get_devpath(dev)) == 0)
 582                         info(event->udev, "moved database from '%s' to '%s'\n",
 583                              udev_device_get_devpath_old(dev), udev_device_get_devpath(dev));
 584         }
 585
 586         /* add device node */
 587         if (major(udev_device_get_devnum(dev)) != 0 &&
 588             (strcmp(udev_device_get_action(dev), "add") == 0 || strcmp(udev_device_get_action(dev), "change") == 0)) {
 589                 char filename[UTIL_PATH_SIZE];
 590                 struct udev_device *dev_old;
 591
 592                 dbg(event->udev, "device node add '%s'\n", udev_device_get_devpath(dev));
 593
 594                 udev_rules_get_name(rules, event);
 595                 if (event->ignore_device) {
 596                         info(event->udev, "device event will be ignored\n");
 597                         goto exit;
 598                 }
 599
 600                 if (event->name[0] == '\0') {
 601                         info(event->udev, "device node creation supressed\n");
 602                         goto exit;
 603                 }
 604
 605                 /* set device node name */
 606                 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
 607                 util_strlcat(filename, "/", sizeof(filename));
 608                 util_strlcat(filename, event->name, sizeof(filename));
 609                 udev_device_set_devnode(dev, filename);
 610
 611                 /* read current database entry; cleanup, if it is known device */
 612                 dev_old = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
 613                 if (dev_old != NULL) {
 614                         info(event->udev, "device '%s' already in database, updating\n",
 615                              udev_device_get_devpath(dev));
 616                         udev_node_update_old_links(dev, dev_old, event->test);
 617                         udev_device_unref(dev_old);
 618                 }
 619
 620                 udev_device_update_db(dev);
 621
 622                 err = udev_node_add(dev, event->mode, event->owner, event->group, event->test);
 623                 if (err != 0)
 624                         goto exit;
 625
 626                 goto exit;
 627         }
 628
 629         /* add netif */
 630         if (strcmp(udev_device_get_subsystem(dev), "net") == 0 && strcmp(udev_device_get_action(dev), "add") == 0) {
 631                 dbg(event->udev, "netif add '%s'\n", udev_device_get_devpath(dev));
 632
 633                 udev_rules_get_name(rules, event);
 634                 if (event->ignore_device) {
 635                         info(event->udev, "device event will be ignored\n");
 636                         goto exit;
 637                 }
 638                 if (event->name[0] == '\0') {
 639                         info(event->udev, "device renaming supressed\n");
 640                         goto exit;
 641                 }
 642
 643                 /* look if we want to change the name of the netif */
 644                 if (strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
 645                         char syspath[UTIL_PATH_SIZE];
 646                         char *pos;
 647
 648                         err = rename_netif(event);
 649                         if (err != 0)
 650                                 goto exit;
 651                         info(event->udev, "renamed netif to '%s'\n", event->name);
 652
 653                         /* remember old name */
 654                         udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
 655
 656                         /* now change the devpath, because the kernel device name has changed */
 657                         util_strlcpy(syspath, udev_device_get_syspath(dev), sizeof(syspath));
 658                         pos = strrchr(syspath, '/');
 659                         if (pos != NULL) {
 660                                 pos[1] = '\0';
 661                                 util_strlcat(syspath, event->name, sizeof(syspath));
 662                                 udev_device_set_syspath(event->dev, syspath);
 663                                 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
 664                                 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
 665                         }
 666                 }
 667                 goto exit;
 668         }
 669
 670         /* remove device node */
 671         if (major(udev_device_get_devnum(dev)) != 0 && strcmp(udev_device_get_action(dev), "remove") == 0) {
 672                 /* import database entry and delete it */
 673                 udev_device_read_db(dev);
 674                 if (!event->test)
 675                         udev_device_delete_db(dev);
 676
 677                 if (udev_device_get_devnode(dev) == NULL) {
 678                         char devnode[UTIL_PATH_SIZE];
 679
 680                         info(event->udev, "'%s' not found in database, using kernel name '%s'\n",
 681                              udev_device_get_syspath(dev), udev_device_get_sysname(dev));
 682                         util_strlcpy(devnode, udev_get_dev_path(event->udev), sizeof(devnode));
 683                         util_strlcat(devnode, "/", sizeof(devnode));
 684                         util_strlcat(devnode, udev_device_get_sysname(dev), sizeof(devnode));
 685                         udev_device_set_devnode(dev, devnode);
 686                 }
 687
 688                 udev_rules_get_run(rules, event);
 689                 if (event->ignore_device) {
 690                         info(event->udev, "device event will be ignored\n");
 691                         goto exit;
 692                 }
 693
 694                 if (udev_device_get_ignore_remove(dev)) {
 695                         info(event->udev, "ignore_remove for '%s'\n", udev_device_get_devnode(dev));
 696                         goto exit;
 697                 }
 698
 699                 err = udev_node_remove(dev, event->test);
 700                 goto exit;
 701         }
 702
 703         /* default devices */
 704         udev_rules_get_run(rules, event);
 705         if (event->ignore_device)
 706                 info(event->udev, "device event will be ignored\n");
 707 exit:
 708         return err;
 709 }
 710
 711 int udev_event_execute_run(struct udev_event *event)
 712 {
 713         struct udev_list_entry *list_entry;
 714         int err = 0;
 715
 716         dbg(event->udev, "executing run list\n");
 717         udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
 718                 const char *cmd = udev_list_entry_get_name(list_entry);
 719
 720                 if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
 721                         struct udev_monitor *monitor;
 722
 723                         monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
 724                         if (monitor == NULL)
 725                                 continue;
 726                         udev_monitor_send_device(monitor, event->dev);
 727                         udev_monitor_unref(monitor);
 728                 } else {
 729                         char program[UTIL_PATH_SIZE];
 730                         char **envp;
 731
 732                         util_strlcpy(program, cmd, sizeof(program));
 733                         udev_event_apply_format(event, program, sizeof(program));
 734                         envp = udev_device_get_properties_envp(event->dev);
 735                         if (run_program(event->udev, program, envp, NULL, 0, NULL) != 0) {
 736                                 if (!udev_list_entry_get_flag(list_entry))
 737                                         err = -1;
 738                         }
 739                 }
 740         }
 741         return err;
 742 }