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 int print_devlinks_cb(struct udev_device *udev_device, const char *value, void *data)
  41 {
  42         printf("link:      '%s'\n", value);
  43         return 0;
  44 }
  45
  46 static int print_properties_cb(struct udev_device *udev_device, const char *key, const char *value, void *data)
  47 {
  48         printf("property:  '%s=%s'\n", key, value);
  49         return 0;
  50 }
  51
  52 static void print_device(struct udev_device *device)
  53 {
  54         const char *str;
  55         int count;
  56
  57         printf("*** device: %p ***\n", device);
  58         str = udev_device_get_action(device);
  59         printf("action:    '%s'\n", str);
  60         str = udev_device_get_syspath(device);
  61         printf("syspath:   '%s'\n", str);
  62         str = udev_device_get_devpath(device);
  63         printf("devpath:   '%s'\n", str);
  64         str = udev_device_get_subsystem(device);
  65         printf("subsystem: '%s'\n", str);
  66         str = udev_device_get_driver(device);
  67         printf("driver:    '%s'\n", str);
  68         str = udev_device_get_devnode(device);
  69         printf("devname:   '%s'\n", str);
  70         count = udev_device_get_devlinks(device, print_devlinks_cb, NULL);
  71         printf("found %i links\n", count);
  72         count = udev_device_get_properties(device, print_properties_cb, NULL);
  73         printf("found %i properties\n", count);
  74         printf("\n");
  75 }
  76
  77 static int test_device(struct udev *udev, const char *syspath)
  78 {
  79         struct udev_device *device;
  80
  81         printf("looking at device: %s\n", syspath);
  82         device = udev_device_new_from_syspath(udev, syspath);
  83         if (device == NULL) {
  84                 printf("no device\n");
  85                 return -1;
  86         }
  87         print_device(device);
  88         udev_device_unref(device);
  89         return 0;
  90 }
  91
  92 static int test_device_parents(struct udev *udev, const char *syspath)
  93 {
  94         struct udev_device *device;
  95         struct udev_device *device_parent;
  96
  97         printf("looking at device: %s\n", syspath);
  98         device = udev_device_new_from_syspath(udev, syspath);
  99         if (device == NULL)
 100                 return -1;
 101
 102         device_parent = device;
 103         do {
 104                 print_device(device_parent);
 105                 device_parent = udev_device_get_parent(device_parent);
 106         } while (device_parent != NULL);
 107
 108         device_parent = device;
 109         do {
 110                 print_device(device_parent);
 111                 device_parent = udev_device_get_parent(device_parent);
 112         } while (device_parent != NULL);
 113         udev_device_unref(device);
 114
 115         return 0;
 116 }
 117
 118 static int test_device_devnum(struct udev *udev)
 119 {
 120         dev_t devnum = makedev(1, 3);
 121         struct udev_device *device;
 122
 123         printf("looking up device: %u:%u\n", major(devnum), minor(devnum));
 124         device = udev_device_new_from_devnum(udev, 'c', devnum);
 125         if (device == NULL)
 126                 return -1;
 127         print_device(device);
 128         udev_device_unref(device);
 129         return 0;
 130 }
 131
 132 static int devices_enum_cb(struct udev_device *device, void *data)
 133 {
 134         printf("device:    '%s' (%s) '%s'\n",
 135                udev_device_get_syspath(device),
 136                udev_device_get_subsystem(device),
 137                udev_device_get_sysname(device));
 138         return 0;
 139 }
 140
 141 static int test_enumerate(struct udev *udev, const char *subsystem)
 142 {
 143         int count;
 144
 145         count = udev_enumerate_devices(udev, subsystem, devices_enum_cb, NULL);
 146         printf("found %i devices\n\n", count);
 147         return count;
 148 }
 149
 150 static int test_monitor(struct udev *udev, const char *socket_path)
 151 {
 152         struct udev_monitor *udev_monitor;
 153         fd_set readfds;
 154         int fd;
 155
 156         udev_monitor = udev_monitor_new_from_socket(udev, socket_path);
 157         if (udev_monitor == NULL) {
 158                 printf("no socket\n");
 159                 return -1;
 160         }
 161         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 162                 printf("bind failed\n");
 163                 return -1;
 164         }
 165
 166         fd = udev_monitor_get_fd(udev_monitor);
 167         FD_ZERO(&readfds);
 168
 169         while (1) {
 170                 struct udev_device *device;
 171                 int fdcount;
 172
 173                 FD_SET(STDIN_FILENO, &readfds);
 174                 FD_SET(fd, &readfds);
 175
 176                 printf("waiting for events on %s, press ENTER to exit\n", socket_path);
 177                 fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
 178                 printf("select fd count: %i\n", fdcount);
 179
 180                 if (FD_ISSET(fd, &readfds)) {
 181                         device = udev_monitor_receive_device(udev_monitor);
 182                         if (device == NULL) {
 183                                 printf("no device from socket\n");
 184                                 continue;
 185                         }
 186                         print_device(device);
 187                         udev_device_unref(device);
 188                 }
 189
 190                 if (FD_ISSET(STDIN_FILENO, &readfds)) {
 191                         printf("exiting loop\n");
 192                         break;
 193                 }
 194         }
 195
 196         udev_monitor_unref(udev_monitor);
 197         return 0;
 198 }
 199
 200 int main(int argc, char *argv[], char *envp[])
 201 {
 202         struct udev *udev = NULL;
 203         static const struct option options[] = {
 204                 { "syspath", 1, NULL, 'p' },
 205                 { "subsystem", 1, NULL, 's' },
 206                 { "socket", 1, NULL, 'S' },
 207                 { "debug", 0, NULL, 'd' },
 208                 { "help", 0, NULL, 'h' },
 209                 { "version", 0, NULL, 'V' },
 210                 {}
 211         };
 212         const char *syspath = "/devices/virtual/mem/null";
 213         const char *subsystem = NULL;
 214         const char *socket = "@/org/kernel/udev/monitor";
 215         char path[1024];
 216         const char *str;
 217
 218         udev = udev_new();
 219         printf("context: %p\n", udev);
 220         if (udev == NULL) {
 221                 printf("no context\n");
 222                 return 1;
 223         }
 224         udev_set_log_fn(udev, log_fn);
 225         printf("set log: %p\n", log_fn);
 226
 227         while (1) {
 228                 int option;
 229
 230                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 231                 if (option == -1)
 232                         break;
 233
 234                 switch (option) {
 235                 case 'p':
 236                         syspath = optarg;
 237                         break;
 238                 case 's':
 239                         subsystem = optarg;
 240                         break;
 241                 case 'S':
 242                         socket = optarg;
 243                         break;
 244                 case 'd':
 245                         if (udev_get_log_priority(udev) < LOG_INFO)
 246                                 udev_set_log_priority(udev, LOG_INFO);
 247                         break;
 248                 case 'h':
 249                         printf("--debug --syspath= --subsystem= --socket= --help\n");
 250                         goto out;
 251                 case 'V':
 252                         printf("%s\n", VERSION);
 253                         goto out;
 254                 default:
 255                         goto out;
 256                 }
 257         }
 258
 259         str = udev_get_sys_path(udev);
 260         printf("sys_path: '%s'\n", str);
 261         str = udev_get_dev_path(udev);
 262         printf("dev_path: '%s'\n", str);
 263
 264         /* add sys path if needed */
 265         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
 266                 snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
 267                 syspath = path;
 268         }
 269
 270         test_device(udev, syspath);
 271         test_device_devnum(udev);
 272         test_device_parents(udev, syspath);
 273         test_enumerate(udev, subsystem);
 274         test_monitor(udev, socket);
 275 out:
 276         udev_unref(udev);
 277         return 0;
 278 }