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_devpath(device);
  57         printf("devpath:   '%s'\n", str);
  58
  59         str = udev_device_get_subsystem(device);
  60         if (str != NULL)
  61                 printf("subsystem: '%s'\n", str);
  62
  63         str = udev_device_get_driver(device);
  64         if (str != NULL)
  65                 printf("driver:    '%s'\n", str);
  66
  67         str = udev_device_get_devnode(device);
  68         if (str != NULL)
  69                 printf("devname:   '%s'\n", str);
  70
  71         devnum = udev_device_get_devnum(device);
  72         if (major(devnum) > 0)
  73                 printf("devnum:    %u:%u\n", major(devnum), minor(devnum));
  74
  75         count = 0;
  76         udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) {
  77                 printf("link:      '%s'\n", udev_list_entry_get_name(list_entry));
  78                 count++;
  79         }
  80         if (count > 0)
  81                 printf("found %i links\n", count);
  82
  83         count = 0;
  84         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) {
  85                 printf("property:  '%s=%s'\n",
  86                        udev_list_entry_get_name(list_entry),
  87                        udev_list_entry_get_value(list_entry));
  88                 count++;
  89         }
  90         if (count > 0)
  91                 printf("found %i properties\n", count);
  92
  93         str = udev_device_get_attr_value(device, "dev");
  94         if (str != NULL)
  95                 printf("attr{dev}: '%s'\n", str);
  96
  97         printf("\n");
  98 }
  99
 100 static int test_device(struct udev *udev, const char *syspath)
 101 {
 102         struct udev_device *device;
 103
 104         printf("looking at device: %s\n", syspath);
 105         device = udev_device_new_from_syspath(udev, syspath);
 106         if (device == NULL) {
 107                 printf("no device found\n");
 108                 return -1;
 109         }
 110         print_device(device);
 111         udev_device_unref(device);
 112         return 0;
 113 }
 114
 115 static int test_device_parents(struct udev *udev, const char *syspath)
 116 {
 117         struct udev_device *device;
 118         struct udev_device *device_parent;
 119
 120         printf("looking at device: %s\n", syspath);
 121         device = udev_device_new_from_syspath(udev, syspath);
 122         if (device == NULL)
 123                 return -1;
 124
 125         printf("looking at parents\n");
 126         device_parent = device;
 127         do {
 128                 print_device(device_parent);
 129                 device_parent = udev_device_get_parent(device_parent);
 130         } while (device_parent != NULL);
 131
 132         printf("looking at parents again\n");
 133         device_parent = device;
 134         do {
 135                 print_device(device_parent);
 136                 device_parent = udev_device_get_parent(device_parent);
 137         } while (device_parent != NULL);
 138         udev_device_unref(device);
 139
 140         return 0;
 141 }
 142
 143 static int test_device_devnum(struct udev *udev)
 144 {
 145         dev_t devnum = makedev(1, 3);
 146         struct udev_device *device;
 147
 148         printf("looking up device: %u:%u\n", major(devnum), minor(devnum));
 149         device = udev_device_new_from_devnum(udev, 'c', devnum);
 150         if (device == NULL)
 151                 return -1;
 152         print_device(device);
 153         udev_device_unref(device);
 154         return 0;
 155 }
 156
 157 static int test_device_subsys_name(struct udev *udev)
 158 {
 159         struct udev_device *device;
 160
 161         printf("looking up device: 'block':'sda'\n");
 162         device = udev_device_new_from_subsystem_sysname(udev, "block", "sda");
 163         if (device == NULL)
 164                 return -1;
 165         print_device(device);
 166         udev_device_unref(device);
 167
 168         printf("looking up device: 'subsystem':'pci'\n");
 169         device = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci");
 170         if (device == NULL)
 171                 return -1;
 172         print_device(device);
 173         udev_device_unref(device);
 174
 175         printf("looking up device: 'drivers':'scsi:sd'\n");
 176         device = udev_device_new_from_subsystem_sysname(udev, "drivers", "scsi:sd");
 177         if (device == NULL)
 178                 return -1;
 179         print_device(device);
 180         udev_device_unref(device);
 181
 182         printf("looking up device: 'module':'printk'\n");
 183         device = udev_device_new_from_subsystem_sysname(udev, "module", "printk");
 184         if (device == NULL)
 185                 return -1;
 186         print_device(device);
 187         udev_device_unref(device);
 188         return 0;
 189 }
 190
 191 static int test_enumerate_print_list(struct udev_enumerate *enumerate)
 192 {
 193         struct udev_list_entry *list_entry;
 194         int count = 0;
 195
 196         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
 197                 struct udev_device *device;
 198
 199                 device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
 200                                                       udev_list_entry_get_name(list_entry));
 201                 if (device != NULL) {
 202                         printf("device: '%s' (%s)\n",
 203                                udev_device_get_syspath(device),
 204                                udev_device_get_subsystem(device));
 205                         udev_device_unref(device);
 206                         count++;
 207                 }
 208         }
 209         printf("found %i devices\n\n", count);
 210         return count;
 211 }
 212
 213 static int test_monitor(struct udev *udev, const char *socket_path)
 214 {
 215         struct udev_monitor *udev_monitor;
 216         fd_set readfds;
 217         int fd;
 218
 219         udev_monitor = udev_monitor_new_from_socket(udev, socket_path);
 220         if (udev_monitor == NULL) {
 221                 printf("no socket\n");
 222                 return -1;
 223         }
 224         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 225                 printf("bind failed\n");
 226                 return -1;
 227         }
 228
 229         fd = udev_monitor_get_fd(udev_monitor);
 230         FD_ZERO(&readfds);
 231
 232         while (1) {
 233                 struct udev_device *device;
 234                 int fdcount;
 235
 236                 FD_SET(STDIN_FILENO, &readfds);
 237                 FD_SET(fd, &readfds);
 238
 239                 printf("waiting for events on %s, press ENTER to exit\n", socket_path);
 240                 fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
 241                 printf("select fd count: %i\n", fdcount);
 242
 243                 if (FD_ISSET(fd, &readfds)) {
 244                         device = udev_monitor_receive_device(udev_monitor);
 245                         if (device == NULL) {
 246                                 printf("no device from socket\n");
 247                                 continue;
 248                         }
 249                         print_device(device);
 250                         udev_device_unref(device);
 251                 }
 252
 253                 if (FD_ISSET(STDIN_FILENO, &readfds)) {
 254                         printf("exiting loop\n");
 255                         break;
 256                 }
 257         }
 258
 259         udev_monitor_unref(udev_monitor);
 260         return 0;
 261 }
 262
 263 static int test_queue(struct udev *udev)
 264 {
 265         struct udev_queue *udev_queue;
 266         unsigned long long int seqnum;
 267         struct udev_list_entry *list_entry;
 268
 269         udev_queue = udev_queue_new(udev);
 270         if (udev_queue == NULL)
 271                 return -1;
 272         seqnum = udev_queue_get_kernel_seqnum(udev_queue);
 273         printf("seqnum kernel: %llu\n", seqnum);
 274         seqnum = udev_queue_get_udev_seqnum(udev_queue);
 275         printf("seqnum udev  : %llu\n", seqnum);
 276
 277         if (udev_queue_get_queue_is_empty(udev_queue))
 278                 printf("queue is empty\n");
 279         printf("get queue list\n");
 280         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 281                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 282         printf("\n");
 283         printf("get queue list again\n");
 284         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 285                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 286         printf("\n");
 287         printf("get failed list\n");
 288         udev_list_entry_foreach(list_entry, udev_queue_get_failed_list_entry(udev_queue))
 289                 printf("failed: '%s'\n", udev_list_entry_get_name(list_entry));
 290         printf("\n");
 291
 292         list_entry = udev_queue_get_queued_list_entry(udev_queue);
 293         if (list_entry != NULL) {
 294                 printf("event [%llu] is queued\n", seqnum);
 295                 seqnum = strtoull(udev_list_entry_get_value(list_entry), NULL, 10);
 296                 if (udev_queue_get_seqnum_is_finished(udev_queue, seqnum))
 297                         printf("event [%llu] is not finished\n", seqnum);
 298                 else
 299                         printf("event [%llu] is finished\n", seqnum);
 300         }
 301         printf("\n");
 302         udev_queue_unref(udev_queue);
 303         return 0;
 304 }
 305
 306 static int test_enumerate(struct udev *udev, const char *subsystem)
 307 {
 308         struct udev_enumerate *udev_enumerate;
 309
 310         printf("enumerate '%s'\n", subsystem == NULL ? "<all>" : subsystem);
 311         udev_enumerate = udev_enumerate_new(udev);
 312         if (udev_enumerate == NULL)
 313                 return -1;
 314         udev_enumerate_add_match_subsystem(udev_enumerate, subsystem);
 315         udev_enumerate_scan_devices(udev_enumerate);
 316         test_enumerate_print_list(udev_enumerate);
 317         udev_enumerate_unref(udev_enumerate);
 318
 319         printf("enumerate 'block'\n");
 320         udev_enumerate = udev_enumerate_new(udev);
 321         if (udev_enumerate == NULL)
 322                 return -1;
 323         udev_enumerate_add_match_subsystem(udev_enumerate,"block");
 324         udev_enumerate_scan_devices(udev_enumerate);
 325         test_enumerate_print_list(udev_enumerate);
 326         udev_enumerate_unref(udev_enumerate);
 327
 328         printf("enumerate 'not block'\n");
 329         udev_enumerate = udev_enumerate_new(udev);
 330         if (udev_enumerate == NULL)
 331                 return -1;
 332         udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block");
 333         udev_enumerate_scan_devices(udev_enumerate);
 334         test_enumerate_print_list(udev_enumerate);
 335         udev_enumerate_unref(udev_enumerate);
 336
 337         printf("enumerate 'pci, mem, vc'\n");
 338         udev_enumerate = udev_enumerate_new(udev);
 339         if (udev_enumerate == NULL)
 340                 return -1;
 341         udev_enumerate_add_match_subsystem(udev_enumerate, "pci");
 342         udev_enumerate_add_match_subsystem(udev_enumerate, "mem");
 343         udev_enumerate_add_match_subsystem(udev_enumerate, "vc");
 344         udev_enumerate_scan_devices(udev_enumerate);
 345         test_enumerate_print_list(udev_enumerate);
 346         udev_enumerate_unref(udev_enumerate);
 347
 348         printf("enumerate 'subsystem'\n");
 349         udev_enumerate = udev_enumerate_new(udev);
 350         if (udev_enumerate == NULL)
 351                 return -1;
 352         udev_enumerate_scan_subsystems(udev_enumerate);
 353         test_enumerate_print_list(udev_enumerate);
 354         udev_enumerate_unref(udev_enumerate);
 355         return 0;
 356 }
 357
 358 int main(int argc, char *argv[])
 359 {
 360         struct udev *udev = NULL;
 361         static const struct option options[] = {
 362                 { "syspath", required_argument, NULL, 'p' },
 363                 { "subsystem", required_argument, NULL, 's' },
 364                 { "socket", required_argument, NULL, 'S' },
 365                 { "debug", no_argument, NULL, 'd' },
 366                 { "help", no_argument, NULL, 'h' },
 367                 { "version", no_argument, NULL, 'V' },
 368                 {}
 369         };
 370         const char *syspath = "/devices/virtual/mem/null";
 371         const char *subsystem = NULL;
 372         const char *socket = "@/org/kernel/udev/monitor";
 373         char path[1024];
 374         const char *str;
 375
 376         udev = udev_new();
 377         printf("context: %p\n", udev);
 378         if (udev == NULL) {
 379                 printf("no context\n");
 380                 return 1;
 381         }
 382         udev_set_log_fn(udev, log_fn);
 383         printf("set log: %p\n", log_fn);
 384
 385         while (1) {
 386                 int option;
 387
 388                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 389                 if (option == -1)
 390                         break;
 391
 392                 switch (option) {
 393                 case 'p':
 394                         syspath = optarg;
 395                         break;
 396                 case 's':
 397                         subsystem = optarg;
 398                         break;
 399                 case 'S':
 400                         socket = optarg;
 401                         break;
 402                 case 'd':
 403                         if (udev_get_log_priority(udev) < LOG_INFO)
 404                                 udev_set_log_priority(udev, LOG_INFO);
 405                         break;
 406                 case 'h':
 407                         printf("--debug --syspath= --subsystem= --socket= --help\n");
 408                         goto out;
 409                 case 'V':
 410                         printf("%s\n", VERSION);
 411                         goto out;
 412                 default:
 413                         goto out;
 414                 }
 415         }
 416
 417         str = udev_get_sys_path(udev);
 418         printf("sys_path: '%s'\n", str);
 419         str = udev_get_dev_path(udev);
 420         printf("dev_path: '%s'\n", str);
 421
 422         /* add sys path if needed */
 423         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
 424                 snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
 425                 syspath = path;
 426         }
 427
 428         test_device(udev, syspath);
 429         test_device_devnum(udev);
 430         test_device_subsys_name(udev);
 431         test_device_parents(udev, syspath);
 432
 433         test_enumerate(udev, subsystem);
 434
 435         test_queue(udev);
 436
 437         test_monitor(udev, socket);
 438 out:
 439         udev_unref(udev);
 440         return 0;
 441 }