libudev/test-libudev.c

   1 /*
   2  * test-libudev
   3  *
   4  * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdarg.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include <errno.h>
  17 #include <string.h>
  18 #include <getopt.h>
  19 #include <syslog.h>
  20 #include <fcntl.h>
  21 #include <sys/select.h>
  22
  23 #include "libudev.h"
  24
  25 static void log_fn(struct udev *udev,
  26                    int priority, const char *file, int line, const char *fn,
  27                    const char *format, va_list args)
  28 {
  29         printf("test-libudev: %s %s:%d ", fn, file, line);
  30         vprintf(format, args);
  31 }
  32
  33 static void print_device(struct udev_device *device)
  34 {
  35         const char *str;
  36         dev_t devnum;
  37         int count;
  38         struct udev_list_entry *list_entry;
  39
  40         printf("*** device: %p ***\n", device);
  41         str = udev_device_get_action(device);
  42         if (str != NULL)
  43                 printf("action:    '%s'\n", str);
  44
  45         str = udev_device_get_syspath(device);
  46         printf("syspath:   '%s'\n", str);
  47
  48         str = udev_device_get_sysname(device);
  49         printf("sysname:   '%s'\n", str);
  50
  51         str = udev_device_get_sysnum(device);
  52         if (str != NULL)
  53                 printf("sysnum:    '%s'\n", str);
  54
  55         str = udev_device_get_devpath(device);
  56         printf("devpath:   '%s'\n", str);
  57
  58         str = udev_device_get_subsystem(device);
  59         if (str != NULL)
  60                 printf("subsystem: '%s'\n", str);
  61
  62         str = udev_device_get_devtype(device);
  63         if (str != NULL)
  64                 printf("devtype:   '%s'\n", str);
  65
  66         str = udev_device_get_driver(device);
  67         if (str != NULL)
  68                 printf("driver:    '%s'\n", str);
  69
  70         str = udev_device_get_devnode(device);
  71         if (str != NULL)
  72                 printf("devname:   '%s'\n", str);
  73
  74         devnum = udev_device_get_devnum(device);
  75         if (major(devnum) > 0)
  76                 printf("devnum:    %u:%u\n", major(devnum), minor(devnum));
  77
  78         count = 0;
  79         udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) {
  80                 printf("link:      '%s'\n", udev_list_entry_get_name(list_entry));
  81                 count++;
  82         }
  83         if (count > 0)
  84                 printf("found %i links\n", count);
  85
  86         count = 0;
  87         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) {
  88                 printf("property:  '%s=%s'\n",
  89                        udev_list_entry_get_name(list_entry),
  90                        udev_list_entry_get_value(list_entry));
  91                 count++;
  92         }
  93         if (count > 0)
  94                 printf("found %i properties\n", count);
  95
  96         str = udev_device_get_property_value(device, "MAJOR");
  97         if (str != NULL)
  98                 printf("MAJOR: '%s'\n", str);
  99
 100         str = udev_device_get_sysattr_value(device, "dev");
 101         if (str != NULL)
 102                 printf("attr{dev}: '%s'\n", str);
 103
 104         printf("\n");
 105 }
 106
 107 static int test_device(struct udev *udev, const char *syspath)
 108 {
 109         struct udev_device *device;
 110
 111         printf("looking at device: %s\n", syspath);
 112         device = udev_device_new_from_syspath(udev, syspath);
 113         if (device == NULL) {
 114                 printf("no device found\n");
 115                 return -1;
 116         }
 117         print_device(device);
 118         udev_device_unref(device);
 119         return 0;
 120 }
 121
 122 static int test_device_parents(struct udev *udev, const char *syspath)
 123 {
 124         struct udev_device *device;
 125         struct udev_device *device_parent;
 126
 127         printf("looking at device: %s\n", syspath);
 128         device = udev_device_new_from_syspath(udev, syspath);
 129         if (device == NULL)
 130                 return -1;
 131
 132         printf("looking at parents\n");
 133         device_parent = device;
 134         do {
 135                 print_device(device_parent);
 136                 device_parent = udev_device_get_parent(device_parent);
 137         } while (device_parent != NULL);
 138
 139         printf("looking at parents again\n");
 140         device_parent = device;
 141         do {
 142                 print_device(device_parent);
 143                 device_parent = udev_device_get_parent(device_parent);
 144         } while (device_parent != NULL);
 145         udev_device_unref(device);
 146
 147         return 0;
 148 }
 149
 150 static int test_device_devnum(struct udev *udev)
 151 {
 152         dev_t devnum = makedev(1, 3);
 153         struct udev_device *device;
 154
 155         printf("looking up device: %u:%u\n", major(devnum), minor(devnum));
 156         device = udev_device_new_from_devnum(udev, 'c', devnum);
 157         if (device == NULL)
 158                 return -1;
 159         print_device(device);
 160         udev_device_unref(device);
 161         return 0;
 162 }
 163
 164 static int test_device_subsys_name(struct udev *udev)
 165 {
 166         struct udev_device *device;
 167
 168         printf("looking up device: 'block':'sda'\n");
 169         device = udev_device_new_from_subsystem_sysname(udev, "block", "sda");
 170         if (device == NULL)
 171                 return -1;
 172         print_device(device);
 173         udev_device_unref(device);
 174
 175         printf("looking up device: 'subsystem':'pci'\n");
 176         device = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci");
 177         if (device == NULL)
 178                 return -1;
 179         print_device(device);
 180         udev_device_unref(device);
 181
 182         printf("looking up device: 'drivers':'scsi:sd'\n");
 183         device = udev_device_new_from_subsystem_sysname(udev, "drivers", "scsi:sd");
 184         if (device == NULL)
 185                 return -1;
 186         print_device(device);
 187         udev_device_unref(device);
 188
 189         printf("looking up device: 'module':'printk'\n");
 190         device = udev_device_new_from_subsystem_sysname(udev, "module", "printk");
 191         if (device == NULL)
 192                 return -1;
 193         print_device(device);
 194         udev_device_unref(device);
 195         return 0;
 196 }
 197
 198 static int test_enumerate_print_list(struct udev_enumerate *enumerate)
 199 {
 200         struct udev_list_entry *list_entry;
 201         int count = 0;
 202
 203         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
 204                 struct udev_device *device;
 205
 206                 device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
 207                                                       udev_list_entry_get_name(list_entry));
 208                 if (device != NULL) {
 209                         printf("device: '%s' (%s)\n",
 210                                udev_device_get_syspath(device),
 211                                udev_device_get_subsystem(device));
 212                         udev_device_unref(device);
 213                         count++;
 214                 }
 215         }
 216         printf("found %i devices\n\n", count);
 217         return count;
 218 }
 219
 220 static int test_monitor(struct udev *udev)
 221 {
 222         struct udev_monitor *udev_monitor;
 223         fd_set readfds;
 224         int fd;
 225
 226         udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
 227         if (udev_monitor == NULL) {
 228                 printf("no socket\n");
 229                 return -1;
 230         }
 231         if (udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "block", NULL) < 0 ||
 232             udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL) < 0 ||
 233             udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device") < 0) {
 234                 printf("filter failed\n");
 235                 return -1;
 236         }
 237         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 238                 printf("bind failed\n");
 239                 return -1;
 240         }
 241
 242         fd = udev_monitor_get_fd(udev_monitor);
 243         FD_ZERO(&readfds);
 244
 245         while (1) {
 246                 struct udev_device *device;
 247                 int fdcount;
 248
 249                 FD_SET(STDIN_FILENO, &readfds);
 250                 FD_SET(fd, &readfds);
 251
 252                 printf("waiting for events from udev, press ENTER to exit\n");
 253                 fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
 254                 printf("select fd count: %i\n", fdcount);
 255
 256                 if (FD_ISSET(fd, &readfds)) {
 257                         device = udev_monitor_receive_device(udev_monitor);
 258                         if (device == NULL) {
 259                                 printf("no device from socket\n");
 260                                 continue;
 261                         }
 262                         print_device(device);
 263                         udev_device_unref(device);
 264                 }
 265
 266                 if (FD_ISSET(STDIN_FILENO, &readfds)) {
 267                         printf("exiting loop\n");
 268                         break;
 269                 }
 270         }
 271
 272         udev_monitor_unref(udev_monitor);
 273         return 0;
 274 }
 275
 276 static int test_queue(struct udev *udev)
 277 {
 278         struct udev_queue *udev_queue;
 279         unsigned long long int seqnum;
 280         struct udev_list_entry *list_entry;
 281
 282         udev_queue = udev_queue_new(udev);
 283         if (udev_queue == NULL)
 284                 return -1;
 285         seqnum = udev_queue_get_kernel_seqnum(udev_queue);
 286         printf("seqnum kernel: %llu\n", seqnum);
 287         seqnum = udev_queue_get_udev_seqnum(udev_queue);
 288         printf("seqnum udev  : %llu\n", seqnum);
 289
 290         if (udev_queue_get_queue_is_empty(udev_queue))
 291                 printf("queue is empty\n");
 292         printf("get queue list\n");
 293         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 294                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 295         printf("\n");
 296         printf("get queue list again\n");
 297         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 298                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 299         printf("\n");
 300         printf("get failed list\n");
 301         udev_list_entry_foreach(list_entry, udev_queue_get_failed_list_entry(udev_queue))
 302                 printf("failed: '%s'\n", udev_list_entry_get_name(list_entry));
 303         printf("\n");
 304
 305         list_entry = udev_queue_get_queued_list_entry(udev_queue);
 306         if (list_entry != NULL) {
 307                 printf("event [%llu] is queued\n", seqnum);
 308                 seqnum = strtoull(udev_list_entry_get_value(list_entry), NULL, 10);
 309                 if (udev_queue_get_seqnum_is_finished(udev_queue, seqnum))
 310                         printf("event [%llu] is not finished\n", seqnum);
 311                 else
 312                         printf("event [%llu] is finished\n", seqnum);
 313         }
 314         printf("\n");
 315         udev_queue_unref(udev_queue);
 316         return 0;
 317 }
 318
 319 static int test_enumerate(struct udev *udev, const char *subsystem)
 320 {
 321         struct udev_enumerate *udev_enumerate;
 322
 323         printf("enumerate '%s'\n", subsystem == NULL ? "<all>" : subsystem);
 324         udev_enumerate = udev_enumerate_new(udev);
 325         if (udev_enumerate == NULL)
 326                 return -1;
 327         udev_enumerate_add_match_subsystem(udev_enumerate, subsystem);
 328         udev_enumerate_scan_devices(udev_enumerate);
 329         test_enumerate_print_list(udev_enumerate);
 330         udev_enumerate_unref(udev_enumerate);
 331
 332         printf("enumerate 'net' + duplicated scan + null + zero\n");
 333         udev_enumerate = udev_enumerate_new(udev);
 334         if (udev_enumerate == NULL)
 335                 return -1;
 336         udev_enumerate_add_match_subsystem(udev_enumerate, "net");
 337         udev_enumerate_scan_devices(udev_enumerate);
 338         udev_enumerate_scan_devices(udev_enumerate);
 339         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 340         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null");
 341         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 342         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null");
 343         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 344         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null");
 345         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null");
 346         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 347         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 348         udev_enumerate_scan_devices(udev_enumerate);
 349         test_enumerate_print_list(udev_enumerate);
 350         udev_enumerate_unref(udev_enumerate);
 351
 352         printf("enumerate 'block'\n");
 353         udev_enumerate = udev_enumerate_new(udev);
 354         if (udev_enumerate == NULL)
 355                 return -1;
 356         udev_enumerate_add_match_subsystem(udev_enumerate,"block");
 357         udev_enumerate_scan_devices(udev_enumerate);
 358         test_enumerate_print_list(udev_enumerate);
 359         udev_enumerate_unref(udev_enumerate);
 360
 361         printf("enumerate 'not block'\n");
 362         udev_enumerate = udev_enumerate_new(udev);
 363         if (udev_enumerate == NULL)
 364                 return -1;
 365         udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block");
 366         udev_enumerate_scan_devices(udev_enumerate);
 367         test_enumerate_print_list(udev_enumerate);
 368         udev_enumerate_unref(udev_enumerate);
 369
 370         printf("enumerate 'pci, mem, vc'\n");
 371         udev_enumerate = udev_enumerate_new(udev);
 372         if (udev_enumerate == NULL)
 373                 return -1;
 374         udev_enumerate_add_match_subsystem(udev_enumerate, "pci");
 375         udev_enumerate_add_match_subsystem(udev_enumerate, "mem");
 376         udev_enumerate_add_match_subsystem(udev_enumerate, "vc");
 377         udev_enumerate_scan_devices(udev_enumerate);
 378         test_enumerate_print_list(udev_enumerate);
 379         udev_enumerate_unref(udev_enumerate);
 380
 381         printf("enumerate 'subsystem'\n");
 382         udev_enumerate = udev_enumerate_new(udev);
 383         if (udev_enumerate == NULL)
 384                 return -1;
 385         udev_enumerate_scan_subsystems(udev_enumerate);
 386         test_enumerate_print_list(udev_enumerate);
 387         udev_enumerate_unref(udev_enumerate);
 388
 389         printf("enumerate 'property IF_FS_*=filesystem'\n");
 390         udev_enumerate = udev_enumerate_new(udev);
 391         if (udev_enumerate == NULL)
 392                 return -1;
 393         udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem");
 394         udev_enumerate_scan_devices(udev_enumerate);
 395         test_enumerate_print_list(udev_enumerate);
 396         udev_enumerate_unref(udev_enumerate);
 397         return 0;
 398 }
 399
 400 int main(int argc, char *argv[])
 401 {
 402         struct udev *udev = NULL;
 403         static const struct option options[] = {
 404                 { "syspath", required_argument, NULL, 'p' },
 405                 { "subsystem", required_argument, NULL, 's' },
 406                 { "debug", no_argument, NULL, 'd' },
 407                 { "help", no_argument, NULL, 'h' },
 408                 { "version", no_argument, NULL, 'V' },
 409                 {}
 410         };
 411         const char *syspath = "/devices/virtual/mem/null";
 412         const char *subsystem = NULL;
 413         char path[1024];
 414         const char *str;
 415
 416         udev = udev_new();
 417         printf("context: %p\n", udev);
 418         if (udev == NULL) {
 419                 printf("no context\n");
 420                 return 1;
 421         }
 422         udev_set_log_fn(udev, log_fn);
 423         printf("set log: %p\n", log_fn);
 424
 425         while (1) {
 426                 int option;
 427
 428                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 429                 if (option == -1)
 430                         break;
 431
 432                 switch (option) {
 433                 case 'p':
 434                         syspath = optarg;
 435                         break;
 436                 case 's':
 437                         subsystem = optarg;
 438                         break;
 439                 case 'd':
 440                         if (udev_get_log_priority(udev) < LOG_INFO)
 441                                 udev_set_log_priority(udev, LOG_INFO);
 442                         break;
 443                 case 'h':
 444                         printf("--debug --syspath= --subsystem= --help\n");
 445                         goto out;
 446                 case 'V':
 447                         printf("%s\n", VERSION);
 448                         goto out;
 449                 default:
 450                         goto out;
 451                 }
 452         }
 453
 454         str = udev_get_sys_path(udev);
 455         printf("sys_path: '%s'\n", str);
 456         str = udev_get_dev_path(udev);
 457         printf("dev_path: '%s'\n", str);
 458
 459         /* add sys path if needed */
 460         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
 461                 snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
 462                 syspath = path;
 463         }
 464
 465         test_device(udev, syspath);
 466         test_device_devnum(udev);
 467         test_device_subsys_name(udev);
 468         test_device_parents(udev, syspath);
 469
 470         test_enumerate(udev, subsystem);
 471
 472         test_queue(udev);
 473
 474         test_monitor(udev);
 475 out:
 476         udev_unref(udev);
 477         return 0;
 478 }