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