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/epoll.h>
  22
  23 #include "libudev.h"
  24
  25 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  26
  27 static void log_fn(struct udev *udev,
  28                    int priority, const char *file, int line, const char *fn,
  29                    const char *format, va_list args)
  30 {
  31         printf("test-libudev: %s %s:%d ", fn, file, line);
  32         vprintf(format, args);
  33 }
  34
  35 static void print_device(struct udev_device *device)
  36 {
  37         const char *str;
  38         dev_t devnum;
  39         int count;
  40         struct udev_list_entry *list_entry;
  41
  42         printf("*** device: %p ***\n", device);
  43         str = udev_device_get_action(device);
  44         if (str != NULL)
  45                 printf("action:    '%s'\n", str);
  46
  47         str = udev_device_get_syspath(device);
  48         printf("syspath:   '%s'\n", str);
  49
  50         str = udev_device_get_sysname(device);
  51         printf("sysname:   '%s'\n", str);
  52
  53         str = udev_device_get_sysnum(device);
  54         if (str != NULL)
  55                 printf("sysnum:    '%s'\n", str);
  56
  57         str = udev_device_get_devpath(device);
  58         printf("devpath:   '%s'\n", str);
  59
  60         str = udev_device_get_subsystem(device);
  61         if (str != NULL)
  62                 printf("subsystem: '%s'\n", str);
  63
  64         str = udev_device_get_devtype(device);
  65         if (str != NULL)
  66                 printf("devtype:   '%s'\n", str);
  67
  68         str = udev_device_get_driver(device);
  69         if (str != NULL)
  70                 printf("driver:    '%s'\n", str);
  71
  72         str = udev_device_get_devnode(device);
  73         if (str != NULL)
  74                 printf("devname:   '%s'\n", str);
  75
  76         devnum = udev_device_get_devnum(device);
  77         if (major(devnum) > 0)
  78                 printf("devnum:    %u:%u\n", major(devnum), minor(devnum));
  79
  80         count = 0;
  81         udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) {
  82                 printf("link:      '%s'\n", udev_list_entry_get_name(list_entry));
  83                 count++;
  84         }
  85         if (count > 0)
  86                 printf("found %i links\n", count);
  87
  88         count = 0;
  89         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) {
  90                 printf("property:  '%s=%s'\n",
  91                        udev_list_entry_get_name(list_entry),
  92                        udev_list_entry_get_value(list_entry));
  93                 count++;
  94         }
  95         if (count > 0)
  96                 printf("found %i properties\n", count);
  97
  98         str = udev_device_get_property_value(device, "MAJOR");
  99         if (str != NULL)
 100                 printf("MAJOR: '%s'\n", str);
 101
 102         str = udev_device_get_sysattr_value(device, "dev");
 103         if (str != NULL)
 104                 printf("attr{dev}: '%s'\n", str);
 105
 106         printf("\n");
 107 }
 108
 109 static int test_device(struct udev *udev, const char *syspath)
 110 {
 111         struct udev_device *device;
 112
 113         printf("looking at device: %s\n", syspath);
 114         device = udev_device_new_from_syspath(udev, syspath);
 115         if (device == NULL) {
 116                 printf("no device found\n");
 117                 return -1;
 118         }
 119         print_device(device);
 120         udev_device_unref(device);
 121         return 0;
 122 }
 123
 124 static int test_device_parents(struct udev *udev, const char *syspath)
 125 {
 126         struct udev_device *device;
 127         struct udev_device *device_parent;
 128
 129         printf("looking at device: %s\n", syspath);
 130         device = udev_device_new_from_syspath(udev, syspath);
 131         if (device == NULL)
 132                 return -1;
 133
 134         printf("looking at parents\n");
 135         device_parent = device;
 136         do {
 137                 print_device(device_parent);
 138                 device_parent = udev_device_get_parent(device_parent);
 139         } while (device_parent != NULL);
 140
 141         printf("looking at parents again\n");
 142         device_parent = device;
 143         do {
 144                 print_device(device_parent);
 145                 device_parent = udev_device_get_parent(device_parent);
 146         } while (device_parent != NULL);
 147         udev_device_unref(device);
 148
 149         return 0;
 150 }
 151
 152 static int test_device_devnum(struct udev *udev)
 153 {
 154         dev_t devnum = makedev(1, 3);
 155         struct udev_device *device;
 156
 157         printf("looking up device: %u:%u\n", major(devnum), minor(devnum));
 158         device = udev_device_new_from_devnum(udev, 'c', devnum);
 159         if (device == NULL)
 160                 return -1;
 161         print_device(device);
 162         udev_device_unref(device);
 163         return 0;
 164 }
 165
 166 static int test_device_subsys_name(struct udev *udev)
 167 {
 168         struct udev_device *device;
 169
 170         printf("looking up device: 'block':'sda'\n");
 171         device = udev_device_new_from_subsystem_sysname(udev, "block", "sda");
 172         if (device == NULL)
 173                 return -1;
 174         print_device(device);
 175         udev_device_unref(device);
 176
 177         printf("looking up device: 'subsystem':'pci'\n");
 178         device = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci");
 179         if (device == NULL)
 180                 return -1;
 181         print_device(device);
 182         udev_device_unref(device);
 183
 184         printf("looking up device: 'drivers':'scsi:sd'\n");
 185         device = udev_device_new_from_subsystem_sysname(udev, "drivers", "scsi:sd");
 186         if (device == NULL)
 187                 return -1;
 188         print_device(device);
 189         udev_device_unref(device);
 190
 191         printf("looking up device: 'module':'printk'\n");
 192         device = udev_device_new_from_subsystem_sysname(udev, "module", "printk");
 193         if (device == NULL)
 194                 return -1;
 195         print_device(device);
 196         udev_device_unref(device);
 197         return 0;
 198 }
 199
 200 static int test_enumerate_print_list(struct udev_enumerate *enumerate)
 201 {
 202         struct udev_list_entry *list_entry;
 203         int count = 0;
 204
 205         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
 206                 struct udev_device *device;
 207
 208                 device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
 209                                                       udev_list_entry_get_name(list_entry));
 210                 if (device != NULL) {
 211                         printf("device: '%s' (%s)\n",
 212                                udev_device_get_syspath(device),
 213                                udev_device_get_subsystem(device));
 214                         udev_device_unref(device);
 215                         count++;
 216                 }
 217         }
 218         printf("found %i devices\n\n", count);
 219         return count;
 220 }
 221
 222 static int test_monitor(struct udev *udev)
 223 {
 224         struct udev_monitor *udev_monitor = NULL;
 225         int fd_ep;
 226         int fd_udev = -1;
 227         struct epoll_event ep_udev, ep_stdin;
 228
 229         fd_ep = epoll_create1(EPOLL_CLOEXEC);
 230         if (fd_ep < 0) {
 231                 printf("error creating epoll fd: %m\n");
 232                 goto out;
 233         }
 234
 235         udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
 236         if (udev_monitor == NULL) {
 237                 printf("no socket\n");
 238                 goto out;
 239         }
 240         fd_udev = udev_monitor_get_fd(udev_monitor);
 241
 242         if (udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "block", NULL) < 0 ||
 243             udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL) < 0 ||
 244             udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device") < 0) {
 245                 printf("filter failed\n");
 246                 goto out;
 247         }
 248
 249         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 250                 printf("bind failed\n");
 251                 goto out;
 252         }
 253
 254         memset(&ep_udev, 0, sizeof(struct epoll_event));
 255         ep_udev.events = EPOLLIN;
 256         ep_udev.data.fd = fd_udev;
 257         if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) {
 258                 printf("fail to add fd to epoll: %m\n");
 259                 goto out;
 260         }
 261
 262         memset(&ep_stdin, 0, sizeof(struct epoll_event));
 263         ep_stdin.events = EPOLLIN;
 264         ep_stdin.data.fd = STDIN_FILENO;
 265         if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, STDIN_FILENO, &ep_stdin) < 0) {
 266                 printf("fail to add fd to epoll: %m\n");
 267                 goto out;
 268         }
 269
 270         for (;;) {
 271                 int fdcount;
 272                 struct epoll_event ev[4];
 273                 struct udev_device *device;
 274                 int i;
 275
 276                 printf("waiting for events from udev, press ENTER to exit\n");
 277                 fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), -1);
 278                 printf("epoll fd count: %i\n", fdcount);
 279
 280                 for (i = 0; i < fdcount; i++) {
 281                         if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) {
 282                                 device = udev_monitor_receive_device(udev_monitor);
 283                                 if (device == NULL) {
 284                                         printf("no device from socket\n");
 285                                         continue;
 286                                 }
 287                                 print_device(device);
 288                                 udev_device_unref(device);
 289                         } else if (ev[i].data.fd == STDIN_FILENO && ev[i].events & EPOLLIN) {
 290                                 printf("exiting loop\n");
 291                                 goto out;
 292                         }
 293                 }
 294         }
 295 out:
 296         if (fd_ep >= 0)
 297                 close(fd_ep);
 298         udev_monitor_unref(udev_monitor);
 299         return 0;
 300 }
 301
 302 static int test_queue(struct udev *udev)
 303 {
 304         struct udev_queue *udev_queue;
 305         unsigned long long int seqnum;
 306         struct udev_list_entry *list_entry;
 307
 308         udev_queue = udev_queue_new(udev);
 309         if (udev_queue == NULL)
 310                 return -1;
 311         seqnum = udev_queue_get_kernel_seqnum(udev_queue);
 312         printf("seqnum kernel: %llu\n", seqnum);
 313         seqnum = udev_queue_get_udev_seqnum(udev_queue);
 314         printf("seqnum udev  : %llu\n", seqnum);
 315
 316         if (udev_queue_get_queue_is_empty(udev_queue))
 317                 printf("queue is empty\n");
 318         printf("get queue list\n");
 319         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 320                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 321         printf("\n");
 322         printf("get queue list again\n");
 323         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 324                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 325         printf("\n");
 326
 327         list_entry = udev_queue_get_queued_list_entry(udev_queue);
 328         if (list_entry != NULL) {
 329                 printf("event [%llu] is queued\n", seqnum);
 330                 seqnum = strtoull(udev_list_entry_get_value(list_entry), NULL, 10);
 331                 if (udev_queue_get_seqnum_is_finished(udev_queue, seqnum))
 332                         printf("event [%llu] is not finished\n", seqnum);
 333                 else
 334                         printf("event [%llu] is finished\n", seqnum);
 335         }
 336         printf("\n");
 337         udev_queue_unref(udev_queue);
 338         return 0;
 339 }
 340
 341 static int test_enumerate(struct udev *udev, const char *subsystem)
 342 {
 343         struct udev_enumerate *udev_enumerate;
 344
 345         printf("enumerate '%s'\n", subsystem == NULL ? "<all>" : subsystem);
 346         udev_enumerate = udev_enumerate_new(udev);
 347         if (udev_enumerate == NULL)
 348                 return -1;
 349         udev_enumerate_add_match_subsystem(udev_enumerate, subsystem);
 350         udev_enumerate_scan_devices(udev_enumerate);
 351         test_enumerate_print_list(udev_enumerate);
 352         udev_enumerate_unref(udev_enumerate);
 353
 354         printf("enumerate 'net' + duplicated scan + null + zero\n");
 355         udev_enumerate = udev_enumerate_new(udev);
 356         if (udev_enumerate == NULL)
 357                 return -1;
 358         udev_enumerate_add_match_subsystem(udev_enumerate, "net");
 359         udev_enumerate_scan_devices(udev_enumerate);
 360         udev_enumerate_scan_devices(udev_enumerate);
 361         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 362         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null");
 363         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 364         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null");
 365         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 366         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null");
 367         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null");
 368         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 369         udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero");
 370         udev_enumerate_scan_devices(udev_enumerate);
 371         test_enumerate_print_list(udev_enumerate);
 372         udev_enumerate_unref(udev_enumerate);
 373
 374         printf("enumerate 'block'\n");
 375         udev_enumerate = udev_enumerate_new(udev);
 376         if (udev_enumerate == NULL)
 377                 return -1;
 378         udev_enumerate_add_match_subsystem(udev_enumerate,"block");
 379         udev_enumerate_add_match_is_initialized(udev_enumerate);
 380         udev_enumerate_scan_devices(udev_enumerate);
 381         test_enumerate_print_list(udev_enumerate);
 382         udev_enumerate_unref(udev_enumerate);
 383
 384         printf("enumerate 'not block'\n");
 385         udev_enumerate = udev_enumerate_new(udev);
 386         if (udev_enumerate == NULL)
 387                 return -1;
 388         udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block");
 389         udev_enumerate_scan_devices(udev_enumerate);
 390         test_enumerate_print_list(udev_enumerate);
 391         udev_enumerate_unref(udev_enumerate);
 392
 393         printf("enumerate 'pci, mem, vc'\n");
 394         udev_enumerate = udev_enumerate_new(udev);
 395         if (udev_enumerate == NULL)
 396                 return -1;
 397         udev_enumerate_add_match_subsystem(udev_enumerate, "pci");
 398         udev_enumerate_add_match_subsystem(udev_enumerate, "mem");
 399         udev_enumerate_add_match_subsystem(udev_enumerate, "vc");
 400         udev_enumerate_scan_devices(udev_enumerate);
 401         test_enumerate_print_list(udev_enumerate);
 402         udev_enumerate_unref(udev_enumerate);
 403
 404         printf("enumerate 'subsystem'\n");
 405         udev_enumerate = udev_enumerate_new(udev);
 406         if (udev_enumerate == NULL)
 407                 return -1;
 408         udev_enumerate_scan_subsystems(udev_enumerate);
 409         test_enumerate_print_list(udev_enumerate);
 410         udev_enumerate_unref(udev_enumerate);
 411
 412         printf("enumerate 'property IF_FS_*=filesystem'\n");
 413         udev_enumerate = udev_enumerate_new(udev);
 414         if (udev_enumerate == NULL)
 415                 return -1;
 416         udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem");
 417         udev_enumerate_scan_devices(udev_enumerate);
 418         test_enumerate_print_list(udev_enumerate);
 419         udev_enumerate_unref(udev_enumerate);
 420         return 0;
 421 }
 422
 423 int main(int argc, char *argv[])
 424 {
 425         struct udev *udev = NULL;
 426         static const struct option options[] = {
 427                 { "syspath", required_argument, NULL, 'p' },
 428                 { "subsystem", required_argument, NULL, 's' },
 429                 { "debug", no_argument, NULL, 'd' },
 430                 { "help", no_argument, NULL, 'h' },
 431                 { "version", no_argument, NULL, 'V' },
 432                 {}
 433         };
 434         const char *syspath = "/devices/virtual/mem/null";
 435         const char *subsystem = NULL;
 436         char path[1024];
 437         const char *str;
 438
 439         udev = udev_new();
 440         printf("context: %p\n", udev);
 441         if (udev == NULL) {
 442                 printf("no context\n");
 443                 return 1;
 444         }
 445         udev_set_log_fn(udev, log_fn);
 446         printf("set log: %p\n", log_fn);
 447
 448         for (;;) {
 449                 int option;
 450
 451                 option = getopt_long(argc, argv, "+p:s:dhV", options, NULL);
 452                 if (option == -1)
 453                         break;
 454
 455                 switch (option) {
 456                 case 'p':
 457                         syspath = optarg;
 458                         break;
 459                 case 's':
 460                         subsystem = optarg;
 461                         break;
 462                 case 'd':
 463                         if (udev_get_log_priority(udev) < LOG_INFO)
 464                                 udev_set_log_priority(udev, LOG_INFO);
 465                         break;
 466                 case 'h':
 467                         printf("--debug --syspath= --subsystem= --help\n");
 468                         goto out;
 469                 case 'V':
 470                         printf("%s\n", VERSION);
 471                         goto out;
 472                 default:
 473                         goto out;
 474                 }
 475         }
 476
 477         str = udev_get_sys_path(udev);
 478         printf("sys_path: '%s'\n", str);
 479         str = udev_get_dev_path(udev);
 480         printf("dev_path: '%s'\n", str);
 481
 482         /* add sys path if needed */
 483         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
 484                 snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
 485                 syspath = path;
 486         }
 487
 488         test_device(udev, syspath);
 489         test_device_devnum(udev);
 490         test_device_subsys_name(udev);
 491         test_device_parents(udev, syspath);
 492
 493         test_enumerate(udev, subsystem);
 494
 495         test_queue(udev);
 496
 497         test_monitor(udev);
 498 out:
 499         udev_unref(udev);
 500         return 0;
 501 }