udev/lib/test-libudev.c

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