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