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_sysattr_value(device, "dev");
 105         if (str != NULL)
 106                 printf("attr{dev}: '%s'\n", str);
 107
 108         printf("\n");
 109 }
 110
 111 static int test_device(struct udev *udev, const char *syspath)
 112 {
 113         struct udev_device *device;
 114
 115         printf("looking at device: %s\n", syspath);
 116         device = udev_device_new_from_syspath(udev, syspath);
 117         if (device == NULL) {
 118                 printf("no device found\n");
 119                 return -1;
 120         }
 121         print_device(device);
 122         udev_device_unref(device);
 123         return 0;
 124 }
 125
 126 static int test_device_parents(struct udev *udev, const char *syspath)
 127 {
 128         struct udev_device *device;
 129         struct udev_device *device_parent;
 130
 131         printf("looking at device: %s\n", syspath);
 132         device = udev_device_new_from_syspath(udev, syspath);
 133         if (device == NULL)
 134                 return -1;
 135
 136         printf("looking at parents\n");
 137         device_parent = device;
 138         do {
 139                 print_device(device_parent);
 140                 device_parent = udev_device_get_parent(device_parent);
 141         } while (device_parent != NULL);
 142
 143         printf("looking at parents again\n");
 144         device_parent = device;
 145         do {
 146                 print_device(device_parent);
 147                 device_parent = udev_device_get_parent(device_parent);
 148         } while (device_parent != NULL);
 149         udev_device_unref(device);
 150
 151         return 0;
 152 }
 153
 154 static int test_device_devnum(struct udev *udev)
 155 {
 156         dev_t devnum = makedev(1, 3);
 157         struct udev_device *device;
 158
 159         printf("looking up device: %u:%u\n", major(devnum), minor(devnum));
 160         device = udev_device_new_from_devnum(udev, 'c', devnum);
 161         if (device == NULL)
 162                 return -1;
 163         print_device(device);
 164         udev_device_unref(device);
 165         return 0;
 166 }
 167
 168 static int test_device_subsys_name(struct udev *udev)
 169 {
 170         struct udev_device *device;
 171
 172         printf("looking up device: 'block':'sda'\n");
 173         device = udev_device_new_from_subsystem_sysname(udev, "block", "sda");
 174         if (device == NULL)
 175                 return -1;
 176         print_device(device);
 177         udev_device_unref(device);
 178
 179         printf("looking up device: 'subsystem':'pci'\n");
 180         device = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci");
 181         if (device == NULL)
 182                 return -1;
 183         print_device(device);
 184         udev_device_unref(device);
 185
 186         printf("looking up device: 'drivers':'scsi:sd'\n");
 187         device = udev_device_new_from_subsystem_sysname(udev, "drivers", "scsi:sd");
 188         if (device == NULL)
 189                 return -1;
 190         print_device(device);
 191         udev_device_unref(device);
 192
 193         printf("looking up device: 'module':'printk'\n");
 194         device = udev_device_new_from_subsystem_sysname(udev, "module", "printk");
 195         if (device == NULL)
 196                 return -1;
 197         print_device(device);
 198         udev_device_unref(device);
 199         return 0;
 200 }
 201
 202 static int test_enumerate_print_list(struct udev_enumerate *enumerate)
 203 {
 204         struct udev_list_entry *list_entry;
 205         int count = 0;
 206
 207         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
 208                 struct udev_device *device;
 209
 210                 device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
 211                                                       udev_list_entry_get_name(list_entry));
 212                 if (device != NULL) {
 213                         printf("device: '%s' (%s)\n",
 214                                udev_device_get_syspath(device),
 215                                udev_device_get_subsystem(device));
 216                         udev_device_unref(device);
 217                         count++;
 218                 }
 219         }
 220         printf("found %i devices\n\n", count);
 221         return count;
 222 }
 223
 224 static int test_monitor(struct udev *udev, const char *socket_path)
 225 {
 226         struct udev_monitor *udev_monitor;
 227         fd_set readfds;
 228         int fd;
 229
 230         udev_monitor = udev_monitor_new_from_socket(udev, socket_path);
 231         if (udev_monitor == NULL) {
 232                 printf("no socket\n");
 233                 return -1;
 234         }
 235         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 236                 printf("bind failed\n");
 237                 return -1;
 238         }
 239
 240         fd = udev_monitor_get_fd(udev_monitor);
 241         FD_ZERO(&readfds);
 242
 243         while (1) {
 244                 struct udev_device *device;
 245                 int fdcount;
 246
 247                 FD_SET(STDIN_FILENO, &readfds);
 248                 FD_SET(fd, &readfds);
 249
 250                 printf("waiting for events on %s, press ENTER to exit\n", socket_path);
 251                 fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
 252                 printf("select fd count: %i\n", fdcount);
 253
 254                 if (FD_ISSET(fd, &readfds)) {
 255                         device = udev_monitor_receive_device(udev_monitor);
 256                         if (device == NULL) {
 257                                 printf("no device from socket\n");
 258                                 continue;
 259                         }
 260                         print_device(device);
 261                         udev_device_unref(device);
 262                 }
 263
 264                 if (FD_ISSET(STDIN_FILENO, &readfds)) {
 265                         printf("exiting loop\n");
 266                         break;
 267                 }
 268         }
 269
 270         udev_monitor_unref(udev_monitor);
 271         return 0;
 272 }
 273
 274 static int test_queue(struct udev *udev)
 275 {
 276         struct udev_queue *udev_queue;
 277         unsigned long long int seqnum;
 278         struct udev_list_entry *list_entry;
 279
 280         udev_queue = udev_queue_new(udev);
 281         if (udev_queue == NULL)
 282                 return -1;
 283         seqnum = udev_queue_get_kernel_seqnum(udev_queue);
 284         printf("seqnum kernel: %llu\n", seqnum);
 285         seqnum = udev_queue_get_udev_seqnum(udev_queue);
 286         printf("seqnum udev  : %llu\n", seqnum);
 287
 288         if (udev_queue_get_queue_is_empty(udev_queue))
 289                 printf("queue is empty\n");
 290         printf("get queue list\n");
 291         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 292                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 293         printf("\n");
 294         printf("get queue list again\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 failed list\n");
 299         udev_list_entry_foreach(list_entry, udev_queue_get_failed_list_entry(udev_queue))
 300                 printf("failed: '%s'\n", udev_list_entry_get_name(list_entry));
 301         printf("\n");
 302
 303         list_entry = udev_queue_get_queued_list_entry(udev_queue);
 304         if (list_entry != NULL) {
 305                 printf("event [%llu] is queued\n", seqnum);
 306                 seqnum = strtoull(udev_list_entry_get_value(list_entry), NULL, 10);
 307                 if (udev_queue_get_seqnum_is_finished(udev_queue, seqnum))
 308                         printf("event [%llu] is not finished\n", seqnum);
 309                 else
 310                         printf("event [%llu] is finished\n", seqnum);
 311         }
 312         printf("\n");
 313         udev_queue_unref(udev_queue);
 314         return 0;
 315 }
 316
 317 static int test_enumerate(struct udev *udev, const char *subsystem)
 318 {
 319         struct udev_enumerate *udev_enumerate;
 320
 321         printf("enumerate '%s'\n", subsystem == NULL ? "<all>" : subsystem);
 322         udev_enumerate = udev_enumerate_new(udev);
 323         if (udev_enumerate == NULL)
 324                 return -1;
 325         udev_enumerate_add_match_subsystem(udev_enumerate, subsystem);
 326         udev_enumerate_scan_devices(udev_enumerate);
 327         test_enumerate_print_list(udev_enumerate);
 328         udev_enumerate_unref(udev_enumerate);
 329
 330         printf("enumerate 'block'\n");
 331         udev_enumerate = udev_enumerate_new(udev);
 332         if (udev_enumerate == NULL)
 333                 return -1;
 334         udev_enumerate_add_match_subsystem(udev_enumerate,"block");
 335         udev_enumerate_scan_devices(udev_enumerate);
 336         test_enumerate_print_list(udev_enumerate);
 337         udev_enumerate_unref(udev_enumerate);
 338
 339         printf("enumerate 'not block'\n");
 340         udev_enumerate = udev_enumerate_new(udev);
 341         if (udev_enumerate == NULL)
 342                 return -1;
 343         udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block");
 344         udev_enumerate_scan_devices(udev_enumerate);
 345         test_enumerate_print_list(udev_enumerate);
 346         udev_enumerate_unref(udev_enumerate);
 347
 348         printf("enumerate 'pci, mem, vc'\n");
 349         udev_enumerate = udev_enumerate_new(udev);
 350         if (udev_enumerate == NULL)
 351                 return -1;
 352         udev_enumerate_add_match_subsystem(udev_enumerate, "pci");
 353         udev_enumerate_add_match_subsystem(udev_enumerate, "mem");
 354         udev_enumerate_add_match_subsystem(udev_enumerate, "vc");
 355         udev_enumerate_scan_devices(udev_enumerate);
 356         test_enumerate_print_list(udev_enumerate);
 357         udev_enumerate_unref(udev_enumerate);
 358
 359         printf("enumerate 'subsystem'\n");
 360         udev_enumerate = udev_enumerate_new(udev);
 361         if (udev_enumerate == NULL)
 362                 return -1;
 363         udev_enumerate_scan_subsystems(udev_enumerate);
 364         test_enumerate_print_list(udev_enumerate);
 365         udev_enumerate_unref(udev_enumerate);
 366
 367         printf("enumerate 'property IF_FS_*=filesystem'\n");
 368         udev_enumerate = udev_enumerate_new(udev);
 369         if (udev_enumerate == NULL)
 370                 return -1;
 371         udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem");
 372         udev_enumerate_scan_devices(udev_enumerate);
 373         test_enumerate_print_list(udev_enumerate);
 374         udev_enumerate_unref(udev_enumerate);
 375         return 0;
 376 }
 377
 378 int main(int argc, char *argv[])
 379 {
 380         struct udev *udev = NULL;
 381         static const struct option options[] = {
 382                 { "syspath", required_argument, NULL, 'p' },
 383                 { "subsystem", required_argument, NULL, 's' },
 384                 { "socket", required_argument, NULL, 'S' },
 385                 { "debug", no_argument, NULL, 'd' },
 386                 { "help", no_argument, NULL, 'h' },
 387                 { "version", no_argument, NULL, 'V' },
 388                 {}
 389         };
 390         const char *syspath = "/devices/virtual/mem/null";
 391         const char *subsystem = NULL;
 392         const char *socket = "@/org/kernel/udev/monitor";
 393         char path[1024];
 394         const char *str;
 395
 396         udev = udev_new();
 397         printf("context: %p\n", udev);
 398         if (udev == NULL) {
 399                 printf("no context\n");
 400                 return 1;
 401         }
 402         udev_set_log_fn(udev, log_fn);
 403         printf("set log: %p\n", log_fn);
 404
 405         while (1) {
 406                 int option;
 407
 408                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 409                 if (option == -1)
 410                         break;
 411
 412                 switch (option) {
 413                 case 'p':
 414                         syspath = optarg;
 415                         break;
 416                 case 's':
 417                         subsystem = optarg;
 418                         break;
 419                 case 'S':
 420                         socket = optarg;
 421                         break;
 422                 case 'd':
 423                         if (udev_get_log_priority(udev) < LOG_INFO)
 424                                 udev_set_log_priority(udev, LOG_INFO);
 425                         break;
 426                 case 'h':
 427                         printf("--debug --syspath= --subsystem= --socket= --help\n");
 428                         goto out;
 429                 case 'V':
 430                         printf("%s\n", VERSION);
 431                         goto out;
 432                 default:
 433                         goto out;
 434                 }
 435         }
 436
 437         str = udev_get_sys_path(udev);
 438         printf("sys_path: '%s'\n", str);
 439         str = udev_get_dev_path(udev);
 440         printf("dev_path: '%s'\n", str);
 441
 442         /* add sys path if needed */
 443         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
 444                 snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
 445                 syspath = path;
 446         }
 447
 448         test_device(udev, syspath);
 449         test_device_devnum(udev);
 450         test_device_subsys_name(udev);
 451         test_device_parents(udev, syspath);
 452
 453         test_enumerate(udev, subsystem);
 454
 455         test_queue(udev);
 456
 457         test_monitor(udev, socket);
 458 out:
 459         udev_unref(udev);
 460         return 0;
 461 }