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