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