src/test/test-libudev.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <stdio.h>
  21 #include <stdarg.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <errno.h>
  25 #include <string.h>
  26 #include <getopt.h>
  27 #include <syslog.h>
  28 #include <fcntl.h>
  29 #include <sys/epoll.h>
  30
  31 #include "libudev.h"
  32 #include "udev-util.h"
  33 #include "util.h"
  34
  35 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  36
  37 _printf_(6,0)
  38 static void log_fn(struct udev *udev,
  39                    int priority, const char *file, int line, const char *fn,
  40                    const char *format, va_list args) {
  41         printf("test-libudev: %s %s:%d ", fn, file, line);
  42         vprintf(format, args);
  43 }
  44
  45 static void print_device(struct udev_device *device) {
  46         const char *str;
  47         dev_t devnum;
  48         int count;
  49         struct udev_list_entry *list_entry;
  50
  51         printf("*** device: %p ***\n", device);
  52         str = udev_device_get_action(device);
  53         if (str != NULL)
  54                 printf("action:    '%s'\n", str);
  55
  56         str = udev_device_get_syspath(device);
  57         printf("syspath:   '%s'\n", str);
  58
  59         str = udev_device_get_sysname(device);
  60         printf("sysname:   '%s'\n", str);
  61
  62         str = udev_device_get_sysnum(device);
  63         if (str != NULL)
  64                 printf("sysnum:    '%s'\n", str);
  65
  66         str = udev_device_get_devpath(device);
  67         printf("devpath:   '%s'\n", str);
  68
  69         str = udev_device_get_subsystem(device);
  70         if (str != NULL)
  71                 printf("subsystem: '%s'\n", str);
  72
  73         str = udev_device_get_devtype(device);
  74         if (str != NULL)
  75                 printf("devtype:   '%s'\n", str);
  76
  77         str = udev_device_get_driver(device);
  78         if (str != NULL)
  79                 printf("driver:    '%s'\n", str);
  80
  81         str = udev_device_get_devnode(device);
  82         if (str != NULL)
  83                 printf("devname:   '%s'\n", str);
  84
  85         devnum = udev_device_get_devnum(device);
  86         if (major(devnum) > 0)
  87                 printf("devnum:    %u:%u\n", major(devnum), minor(devnum));
  88
  89         count = 0;
  90         udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) {
  91                 printf("link:      '%s'\n", udev_list_entry_get_name(list_entry));
  92                 count++;
  93         }
  94         if (count > 0)
  95                 printf("found %i links\n", count);
  96
  97         count = 0;
  98         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) {
  99                 printf("property:  '%s=%s'\n",
 100                        udev_list_entry_get_name(list_entry),
 101                        udev_list_entry_get_value(list_entry));
 102                 count++;
 103         }
 104         if (count > 0)
 105                 printf("found %i properties\n", count);
 106
 107         str = udev_device_get_property_value(device, "MAJOR");
 108         if (str != NULL)
 109                 printf("MAJOR: '%s'\n", str);
 110
 111         str = udev_device_get_sysattr_value(device, "dev");
 112         if (str != NULL)
 113                 printf("attr{dev}: '%s'\n", str);
 114
 115         printf("\n");
 116 }
 117
 118 static int test_device(struct udev *udev, const char *syspath) {
 119         _cleanup_udev_device_unref_ struct udev_device *device;
 120
 121         printf("looking at device: %s\n", syspath);
 122         device = udev_device_new_from_syspath(udev, syspath);
 123         if (device == NULL) {
 124                 printf("no device found\n");
 125                 return -1;
 126         }
 127         print_device(device);
 128
 129         return 0;
 130 }
 131
 132 static int test_device_parents(struct udev *udev, const char *syspath) {
 133         _cleanup_udev_device_unref_ struct udev_device *device;
 134         struct udev_device *device_parent;
 135
 136         printf("looking at device: %s\n", syspath);
 137         device = udev_device_new_from_syspath(udev, syspath);
 138         if (device == NULL)
 139                 return -1;
 140
 141         printf("looking at parents\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
 148         printf("looking at parents again\n");
 149         device_parent = device;
 150         do {
 151                 print_device(device_parent);
 152                 device_parent = udev_device_get_parent(device_parent);
 153         } while (device_parent != NULL);
 154
 155         return 0;
 156 }
 157
 158 static int test_device_devnum(struct udev *udev) {
 159         dev_t devnum = makedev(1, 3);
 160         struct udev_device *device;
 161
 162         printf("looking up device: %u:%u\n", major(devnum), minor(devnum));
 163         device = udev_device_new_from_devnum(udev, 'c', devnum);
 164         if (device == NULL)
 165                 return -1;
 166         print_device(device);
 167         udev_device_unref(device);
 168         return 0;
 169 }
 170
 171 static int test_device_subsys_name(struct udev *udev) {
 172         struct udev_device *device;
 173
 174         printf("looking up device: 'block':'sda'\n");
 175         device = udev_device_new_from_subsystem_sysname(udev, "block", "sda");
 176         if (device == NULL)
 177                 return -1;
 178         print_device(device);
 179         udev_device_unref(device);
 180
 181         printf("looking up device: 'subsystem':'pci'\n");
 182         device = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci");
 183         if (device == NULL)
 184                 return -1;
 185         print_device(device);
 186         udev_device_unref(device);
 187
 188         printf("looking up device: 'drivers':'scsi:sd'\n");
 189         device = udev_device_new_from_subsystem_sysname(udev, "drivers", "scsi:sd");
 190         if (device == NULL)
 191                 return -1;
 192         print_device(device);
 193         udev_device_unref(device);
 194
 195         printf("looking up device: 'module':'printk'\n");
 196         device = udev_device_new_from_subsystem_sysname(udev, "module", "printk");
 197         if (device == NULL)
 198                 return -1;
 199         print_device(device);
 200         udev_device_unref(device);
 201         return 0;
 202 }
 203
 204 static int test_enumerate_print_list(struct udev_enumerate *enumerate) {
 205         struct udev_list_entry *list_entry;
 206         int count = 0;
 207
 208         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
 209                 struct udev_device *device;
 210
 211                 device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
 212                                                       udev_list_entry_get_name(list_entry));
 213                 if (device != NULL) {
 214                         printf("device: '%s' (%s)\n",
 215                                udev_device_get_syspath(device),
 216                                udev_device_get_subsystem(device));
 217                         udev_device_unref(device);
 218                         count++;
 219                 }
 220         }
 221         printf("found %i devices\n\n", count);
 222         return count;
 223 }
 224
 225 static int test_monitor(struct udev *udev) {
 226         struct udev_monitor *udev_monitor = NULL;
 227         int fd_ep;
 228         int fd_udev = -1;
 229         struct epoll_event ep_udev, ep_stdin;
 230
 231         fd_ep = epoll_create1(EPOLL_CLOEXEC);
 232         if (fd_ep < 0) {
 233                 printf("error creating epoll fd: %m\n");
 234                 goto out;
 235         }
 236
 237         udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
 238         if (udev_monitor == NULL) {
 239                 printf("no socket\n");
 240                 goto out;
 241         }
 242         fd_udev = udev_monitor_get_fd(udev_monitor);
 243
 244         if (udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "block", NULL) < 0 ||
 245             udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL) < 0 ||
 246             udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device") < 0) {
 247                 printf("filter failed\n");
 248                 goto out;
 249         }
 250
 251         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 252                 printf("bind failed\n");
 253                 goto out;
 254         }
 255
 256         memzero(&ep_udev, sizeof(struct epoll_event));
 257         ep_udev.events = EPOLLIN;
 258         ep_udev.data.fd = fd_udev;
 259         if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) {
 260                 printf("fail to add fd to epoll: %m\n");
 261                 goto out;
 262         }
 263
 264         memzero(&ep_stdin, sizeof(struct epoll_event));
 265         ep_stdin.events = EPOLLIN;
 266         ep_stdin.data.fd = STDIN_FILENO;
 267         if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, STDIN_FILENO, &ep_stdin) < 0) {
 268                 printf("fail to add fd to epoll: %m\n");
 269                 goto out;
 270         }
 271
 272         for (;;) {
 273                 int fdcount;
 274                 struct epoll_event ev[4];
 275                 struct udev_device *device;
 276                 int i;
 277
 278                 printf("waiting for events from udev, press ENTER to exit\n");
 279                 fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), -1);
 280                 printf("epoll fd count: %i\n", fdcount);
 281
 282                 for (i = 0; i < fdcount; i++) {
 283                         if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) {
 284                                 device = udev_monitor_receive_device(udev_monitor);
 285                                 if (device == NULL) {
 286                                         printf("no device from socket\n");
 287                                         continue;
 288                                 }
 289                                 print_device(device);
 290                                 udev_device_unref(device);
 291                         } else if (ev[i].data.fd == STDIN_FILENO && ev[i].events & EPOLLIN) {
 292                                 printf("exiting loop\n");
 293                                 goto out;
 294                         }
 295                 }
 296         }
 297 out:
 298         if (fd_ep >= 0)
 299                 close(fd_ep);
 300         udev_monitor_unref(udev_monitor);
 301         return 0;
 302 }
 303
 304 static int test_queue(struct udev *udev) {
 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         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 static void test_hwdb(struct udev *udev, const char *modalias) {
 424         struct udev_hwdb *hwdb;
 425         struct udev_list_entry *entry;
 426
 427         hwdb = udev_hwdb_new(udev);
 428
 429         udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0))
 430                 printf("'%s'='%s'\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
 431         printf("\n");
 432
 433         hwdb = udev_hwdb_unref(hwdb);
 434         assert(hwdb == NULL);
 435 }
 436
 437 int main(int argc, char *argv[]) {
 438         struct udev *udev = NULL;
 439         static const struct option options[] = {
 440                 { "syspath", required_argument, NULL, 'p' },
 441                 { "subsystem", required_argument, NULL, 's' },
 442                 { "debug", no_argument, NULL, 'd' },
 443                 { "help", no_argument, NULL, 'h' },
 444                 { "version", no_argument, NULL, 'V' },
 445                 {}
 446         };
 447         const char *syspath = "/devices/virtual/mem/null";
 448         const char *subsystem = NULL;
 449         char path[1024];
 450
 451         udev = udev_new();
 452         printf("context: %p\n", udev);
 453         if (udev == NULL) {
 454                 printf("no context\n");
 455                 return 1;
 456         }
 457         udev_set_log_fn(udev, log_fn);
 458         printf("set log: %p\n", log_fn);
 459
 460         for (;;) {
 461                 int option;
 462
 463                 option = getopt_long(argc, argv, "+p:s:dhV", options, NULL);
 464                 if (option == -1)
 465                         break;
 466
 467                 switch (option) {
 468                 case 'p':
 469                         syspath = optarg;
 470                         break;
 471                 case 's':
 472                         subsystem = optarg;
 473                         break;
 474                 case 'd':
 475                         if (udev_get_log_priority(udev) < LOG_INFO)
 476                                 udev_set_log_priority(udev, LOG_INFO);
 477                         break;
 478                 case 'h':
 479                         printf("--debug --syspath= --subsystem= --help\n");
 480                         goto out;
 481                 case 'V':
 482                         printf("%s\n", VERSION);
 483                         goto out;
 484                 default:
 485                         goto out;
 486                 }
 487         }
 488
 489         /* add sys path if needed */
 490         if (!startswith(syspath, "/sys")) {
 491                 snprintf(path, sizeof(path), "/sys/%s", syspath);
 492                 syspath = path;
 493         }
 494
 495         test_device(udev, syspath);
 496         test_device_devnum(udev);
 497         test_device_subsys_name(udev);
 498         test_device_parents(udev, syspath);
 499
 500         test_enumerate(udev, subsystem);
 501
 502         test_queue(udev);
 503
 504         test_hwdb(udev, "usb:v0D50p0011*");
 505
 506         test_monitor(udev);
 507 out:
 508         udev_unref(udev);
 509         return 0;
 510 }