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 <unistd.h>
  23 #include <errno.h>
  24 #include <string.h>
  25 #include <getopt.h>
  26 #include <syslog.h>
  27 #include <fcntl.h>
  28 #include <sys/select.h>
  29
  30 #include "libudev.h"
  31
  32 static void log_fn(struct udev *udev,
  33                    int priority, const char *file, int line, const char *fn,
  34                    const char *format, va_list args)
  35 {
  36         printf("test-libudev: %s %s:%d ", fn, file, line);
  37         vprintf(format, args);
  38 }
  39
  40 static void print_device(struct udev_device *device)
  41 {
  42         const char *str;
  43         dev_t devnum;
  44         int count;
  45         struct udev_list_entry *list_entry;
  46
  47         printf("*** device: %p ***\n", device);
  48         str = udev_device_get_action(device);
  49         if (str != NULL)
  50                 printf("action:    '%s'\n", str);
  51
  52         str = udev_device_get_syspath(device);
  53         printf("syspath:   '%s'\n", str);
  54
  55         str = udev_device_get_devpath(device);
  56         printf("devpath:   '%s'\n", str);
  57
  58         str = udev_device_get_subsystem(device);
  59         if (str != NULL)
  60                 printf("subsystem: '%s'\n", str);
  61
  62         str = udev_device_get_driver(device);
  63         if (str != NULL)
  64                 printf("driver:    '%s'\n", str);
  65
  66         str = udev_device_get_devnode(device);
  67         if (str != NULL)
  68                 printf("devname:   '%s'\n", str);
  69
  70         devnum = udev_device_get_devnum(device);
  71         if (major(devnum) > 0)
  72                 printf("devnum:    %u:%u\n", major(devnum), minor(devnum));
  73
  74         count = 0;
  75         list_entry = udev_device_get_devlinks_list_entry(device);
  76         while (list_entry != NULL) {
  77                 printf("link:      '%s'\n", udev_list_entry_get_name(list_entry));
  78                 count++;
  79                 list_entry = udev_list_entry_get_next(list_entry);
  80         }
  81         if (count > 0)
  82                 printf("found %i links\n", count);
  83
  84         count = 0;
  85         list_entry = udev_device_get_properties_list_entry(device);
  86         while (list_entry != NULL) {
  87                 printf("property:  '%s=%s'\n",
  88                        udev_list_entry_get_name(list_entry),
  89                        udev_list_entry_get_value(list_entry));
  90                 count++;
  91                 list_entry = udev_list_entry_get_next(list_entry);
  92         }
  93         if (count > 0)
  94                 printf("found %i properties\n", count);
  95
  96         str = udev_device_get_attr_value(device, "dev");
  97         if (str != NULL)
  98                 printf("attr{dev}: '%s'\n", str);
  99
 100         printf("\n");
 101 }
 102
 103 static int test_device(struct udev *udev, const char *syspath)
 104 {
 105         struct udev_device *device;
 106
 107         printf("looking at device: %s\n", syspath);
 108         device = udev_device_new_from_syspath(udev, syspath);
 109         if (device == NULL) {
 110                 printf("no device\n");
 111                 return -1;
 112         }
 113         print_device(device);
 114         udev_device_unref(device);
 115         return 0;
 116 }
 117
 118 static int test_device_parents(struct udev *udev, const char *syspath)
 119 {
 120         struct udev_device *device;
 121         struct udev_device *device_parent;
 122
 123         printf("looking at device: %s\n", syspath);
 124         device = udev_device_new_from_syspath(udev, syspath);
 125         if (device == NULL)
 126                 return -1;
 127
 128         printf("looking at parents\n");
 129         device_parent = device;
 130         do {
 131                 print_device(device_parent);
 132                 device_parent = udev_device_get_parent(device_parent);
 133         } while (device_parent != NULL);
 134
 135         printf("looking at parents again\n");
 136         device_parent = device;
 137         do {
 138                 print_device(device_parent);
 139                 device_parent = udev_device_get_parent(device_parent);
 140         } while (device_parent != NULL);
 141         udev_device_unref(device);
 142
 143         return 0;
 144 }
 145
 146 static int test_device_devnum(struct udev *udev)
 147 {
 148         dev_t devnum = makedev(1, 3);
 149         struct udev_device *device;
 150
 151         printf("looking up device: %u:%u\n", major(devnum), minor(devnum));
 152         device = udev_device_new_from_devnum(udev, 'c', devnum);
 153         if (device == NULL)
 154                 return -1;
 155         print_device(device);
 156         udev_device_unref(device);
 157         return 0;
 158 }
 159
 160 static int test_enumerate(struct udev *udev, const char *subsystem)
 161 {
 162         struct udev_enumerate *enumerate;
 163         struct udev_list_entry *list_entry;
 164         int count = 0;
 165
 166         enumerate = udev_enumerate_new_from_subsystems(udev, NULL);
 167         if (enumerate == NULL)
 168                 return -1;
 169         list_entry = udev_enumerate_get_list_entry(enumerate);
 170         while (list_entry != NULL) {
 171                 struct udev_device *device;
 172
 173                 device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
 174                 if (device != NULL) {
 175                         printf("device:    '%s' (%s) '%s'\n",
 176                                udev_device_get_syspath(device),
 177                                udev_device_get_subsystem(device),
 178                                udev_device_get_sysname(device));
 179                         udev_device_unref(device);
 180                         count++;
 181                 }
 182                 list_entry = udev_list_entry_get_next(list_entry);
 183         }
 184         udev_enumerate_unref(enumerate);
 185         printf("found %i devices\n\n", count);
 186         return count;
 187 }
 188
 189 static int test_monitor(struct udev *udev, const char *socket_path)
 190 {
 191         struct udev_monitor *udev_monitor;
 192         fd_set readfds;
 193         int fd;
 194
 195         udev_monitor = udev_monitor_new_from_socket(udev, socket_path);
 196         if (udev_monitor == NULL) {
 197                 printf("no socket\n");
 198                 return -1;
 199         }
 200         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 201                 printf("bind failed\n");
 202                 return -1;
 203         }
 204
 205         fd = udev_monitor_get_fd(udev_monitor);
 206         FD_ZERO(&readfds);
 207
 208         while (1) {
 209                 struct udev_device *device;
 210                 int fdcount;
 211
 212                 FD_SET(STDIN_FILENO, &readfds);
 213                 FD_SET(fd, &readfds);
 214
 215                 printf("waiting for events on %s, press ENTER to exit\n", socket_path);
 216                 fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
 217                 printf("select fd count: %i\n", fdcount);
 218
 219                 if (FD_ISSET(fd, &readfds)) {
 220                         device = udev_monitor_receive_device(udev_monitor);
 221                         if (device == NULL) {
 222                                 printf("no device from socket\n");
 223                                 continue;
 224                         }
 225                         print_device(device);
 226                         udev_device_unref(device);
 227                 }
 228
 229                 if (FD_ISSET(STDIN_FILENO, &readfds)) {
 230                         printf("exiting loop\n");
 231                         break;
 232                 }
 233         }
 234
 235         udev_monitor_unref(udev_monitor);
 236         return 0;
 237 }
 238
 239 int main(int argc, char *argv[], char *envp[])
 240 {
 241         struct udev *udev = NULL;
 242         static const struct option options[] = {
 243                 { "syspath", 1, NULL, 'p' },
 244                 { "subsystem", 1, NULL, 's' },
 245                 { "socket", 1, NULL, 'S' },
 246                 { "debug", 0, NULL, 'd' },
 247                 { "help", 0, NULL, 'h' },
 248                 { "version", 0, NULL, 'V' },
 249                 {}
 250         };
 251         const char *syspath = "/devices/virtual/mem/null";
 252         const char *subsystem = NULL;
 253         const char *socket = "@/org/kernel/udev/monitor";
 254         char path[1024];
 255         const char *str;
 256
 257         udev = udev_new();
 258         printf("context: %p\n", udev);
 259         if (udev == NULL) {
 260                 printf("no context\n");
 261                 return 1;
 262         }
 263         udev_set_log_fn(udev, log_fn);
 264         printf("set log: %p\n", log_fn);
 265
 266         while (1) {
 267                 int option;
 268
 269                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 270                 if (option == -1)
 271                         break;
 272
 273                 switch (option) {
 274                 case 'p':
 275                         syspath = optarg;
 276                         break;
 277                 case 's':
 278                         subsystem = optarg;
 279                         break;
 280                 case 'S':
 281                         socket = optarg;
 282                         break;
 283                 case 'd':
 284                         if (udev_get_log_priority(udev) < LOG_INFO)
 285                                 udev_set_log_priority(udev, LOG_INFO);
 286                         break;
 287                 case 'h':
 288                         printf("--debug --syspath= --subsystem= --socket= --help\n");
 289                         goto out;
 290                 case 'V':
 291                         printf("%s\n", VERSION);
 292                         goto out;
 293                 default:
 294                         goto out;
 295                 }
 296         }
 297
 298         str = udev_get_sys_path(udev);
 299         printf("sys_path: '%s'\n", str);
 300         str = udev_get_dev_path(udev);
 301         printf("dev_path: '%s'\n", str);
 302
 303         /* add sys path if needed */
 304         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
 305                 snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
 306                 syspath = path;
 307         }
 308
 309         test_device(udev, syspath);
 310         test_device_devnum(udev);
 311         test_device_parents(udev, syspath);
 312         test_enumerate(udev, subsystem);
 313         test_monitor(udev, socket);
 314 out:
 315         udev_unref(udev);
 316         return 0;
 317 }