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\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_enumerate_print_list(struct udev_enumerate *enumerate)
 158 {
 159         struct udev_list_entry *list_entry;
 160         int count = 0;
 161
 162         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
 163                 struct udev_device *device;
 164
 165                 device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
 166                                                       udev_list_entry_get_name(list_entry));
 167                 if (device != NULL) {
 168                         printf("device: '%s' (%s)\n",
 169                                udev_device_get_syspath(device),
 170                                udev_device_get_subsystem(device));
 171                         udev_device_unref(device);
 172                         count++;
 173                 }
 174         }
 175         printf("found %i devices\n\n", count);
 176         return count;
 177 }
 178
 179 static int test_monitor(struct udev *udev, const char *socket_path)
 180 {
 181         struct udev_monitor *udev_monitor;
 182         fd_set readfds;
 183         int fd;
 184
 185         udev_monitor = udev_monitor_new_from_socket(udev, socket_path);
 186         if (udev_monitor == NULL) {
 187                 printf("no socket\n");
 188                 return -1;
 189         }
 190         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 191                 printf("bind failed\n");
 192                 return -1;
 193         }
 194
 195         fd = udev_monitor_get_fd(udev_monitor);
 196         FD_ZERO(&readfds);
 197
 198         while (1) {
 199                 struct udev_device *device;
 200                 int fdcount;
 201
 202                 FD_SET(STDIN_FILENO, &readfds);
 203                 FD_SET(fd, &readfds);
 204
 205                 printf("waiting for events on %s, press ENTER to exit\n", socket_path);
 206                 fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
 207                 printf("select fd count: %i\n", fdcount);
 208
 209                 if (FD_ISSET(fd, &readfds)) {
 210                         device = udev_monitor_receive_device(udev_monitor);
 211                         if (device == NULL) {
 212                                 printf("no device from socket\n");
 213                                 continue;
 214                         }
 215                         print_device(device);
 216                         udev_device_unref(device);
 217                 }
 218
 219                 if (FD_ISSET(STDIN_FILENO, &readfds)) {
 220                         printf("exiting loop\n");
 221                         break;
 222                 }
 223         }
 224
 225         udev_monitor_unref(udev_monitor);
 226         return 0;
 227 }
 228
 229 static int test_queue(struct udev *udev)
 230 {
 231         struct udev_queue *udev_queue;
 232         unsigned long long int seqnum;
 233         struct udev_list_entry *list_entry;
 234
 235         udev_queue = udev_queue_new(udev);
 236         if (udev_queue == NULL)
 237                 return -1;
 238         seqnum = udev_queue_get_kernel_seqnum(udev_queue);
 239         printf("seqnum kernel: %llu\n", seqnum);
 240         seqnum = udev_queue_get_udev_seqnum(udev_queue);
 241         printf("seqnum udev  : %llu\n", seqnum);
 242
 243         if (udev_queue_get_queue_is_empty(udev_queue))
 244                 printf("queue is empty\n");
 245         printf("get queue list\n");
 246         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 247                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 248         printf("\n");
 249         printf("get queue list again\n");
 250         udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
 251                 printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
 252         printf("\n");
 253         printf("get failed list\n");
 254         udev_list_entry_foreach(list_entry, udev_queue_get_failed_list_entry(udev_queue))
 255                 printf("failed: '%s'\n", udev_list_entry_get_name(list_entry));
 256         printf("\n");
 257
 258         list_entry = udev_queue_get_queued_list_entry(udev_queue);
 259         if (list_entry != NULL) {
 260                 printf("event [%llu] is queued\n", seqnum);
 261                 seqnum = strtoull(udev_list_entry_get_value(list_entry), NULL, 10);
 262                 if (udev_queue_get_seqnum_is_finished(udev_queue, seqnum))
 263                         printf("event [%llu] is not finished\n", seqnum);
 264                 else
 265                         printf("event [%llu] is finished\n", seqnum);
 266         }
 267         printf("\n");
 268         udev_queue_unref(udev_queue);
 269         return 0;
 270 }
 271
 272 int main(int argc, char *argv[], char *envp[])
 273 {
 274         struct udev *udev = NULL;
 275         static const struct option options[] = {
 276                 { "syspath", 1, NULL, 'p' },
 277                 { "subsystem", 1, NULL, 's' },
 278                 { "socket", 1, NULL, 'S' },
 279                 { "debug", 0, NULL, 'd' },
 280                 { "help", 0, NULL, 'h' },
 281                 { "version", 0, NULL, 'V' },
 282                 {}
 283         };
 284         struct udev_enumerate *udev_enumerate;
 285         const char *syspath = "/devices/virtual/mem/null";
 286         const char *subsystem = NULL;
 287         const char *socket = "@/org/kernel/udev/monitor";
 288         char path[1024];
 289         const char *str;
 290
 291         udev = udev_new();
 292         printf("context: %p\n", udev);
 293         if (udev == NULL) {
 294                 printf("no context\n");
 295                 return 1;
 296         }
 297         udev_set_log_fn(udev, log_fn);
 298         printf("set log: %p\n", log_fn);
 299
 300         while (1) {
 301                 int option;
 302
 303                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 304                 if (option == -1)
 305                         break;
 306
 307                 switch (option) {
 308                 case 'p':
 309                         syspath = optarg;
 310                         break;
 311                 case 's':
 312                         subsystem = optarg;
 313                         break;
 314                 case 'S':
 315                         socket = optarg;
 316                         break;
 317                 case 'd':
 318                         if (udev_get_log_priority(udev) < LOG_INFO)
 319                                 udev_set_log_priority(udev, LOG_INFO);
 320                         break;
 321                 case 'h':
 322                         printf("--debug --syspath= --subsystem= --socket= --help\n");
 323                         goto out;
 324                 case 'V':
 325                         printf("%s\n", VERSION);
 326                         goto out;
 327                 default:
 328                         goto out;
 329                 }
 330         }
 331
 332         str = udev_get_sys_path(udev);
 333         printf("sys_path: '%s'\n", str);
 334         str = udev_get_dev_path(udev);
 335         printf("dev_path: '%s'\n", str);
 336
 337         /* add sys path if needed */
 338         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
 339                 snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
 340                 syspath = path;
 341         }
 342
 343         test_device(udev, syspath);
 344         test_device_devnum(udev);
 345         test_device_parents(udev, syspath);
 346
 347         printf("enumerate '%s'\n", subsystem == NULL ? "<all>" : subsystem);
 348         udev_enumerate = udev_enumerate_new(udev);
 349         if (udev_enumerate == NULL)
 350                 return -1;
 351         udev_enumerate_add_match_subsystem(udev_enumerate, subsystem);
 352         udev_enumerate_scan_devices(udev_enumerate);
 353         test_enumerate_print_list(udev_enumerate);
 354         udev_enumerate_unref(udev_enumerate);
 355
 356         printf("enumerate 'block'\n");
 357         udev_enumerate = udev_enumerate_new(udev);
 358         if (udev_enumerate == NULL)
 359                 return -1;
 360         udev_enumerate_add_match_subsystem(udev_enumerate,"block");
 361         udev_enumerate_scan_devices(udev_enumerate);
 362         test_enumerate_print_list(udev_enumerate);
 363         udev_enumerate_unref(udev_enumerate);
 364
 365         printf("enumerate 'not block'\n");
 366         udev_enumerate = udev_enumerate_new(udev);
 367         if (udev_enumerate == NULL)
 368                 return -1;
 369         udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block");
 370         udev_enumerate_scan_devices(udev_enumerate);
 371         test_enumerate_print_list(udev_enumerate);
 372         udev_enumerate_unref(udev_enumerate);
 373
 374         printf("enumerate 'pci, mem, vc'\n");
 375         udev_enumerate = udev_enumerate_new(udev);
 376         if (udev_enumerate == NULL)
 377                 return -1;
 378         udev_enumerate_add_match_subsystem(udev_enumerate, "pci");
 379         udev_enumerate_add_match_subsystem(udev_enumerate, "mem");
 380         udev_enumerate_add_match_subsystem(udev_enumerate, "vc");
 381         udev_enumerate_scan_devices(udev_enumerate);
 382         test_enumerate_print_list(udev_enumerate);
 383         udev_enumerate_unref(udev_enumerate);
 384
 385         printf("enumerate 'subsystem'\n");
 386         udev_enumerate = udev_enumerate_new(udev);
 387         if (udev_enumerate == NULL)
 388                 return -1;
 389         udev_enumerate_scan_subsystems(udev_enumerate);
 390         test_enumerate_print_list(udev_enumerate);
 391         udev_enumerate_unref(udev_enumerate);
 392
 393         test_queue(udev);
 394
 395         test_monitor(udev, socket);
 396 out:
 397         udev_unref(udev);
 398         return 0;
 399 }