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 "config.h"
  21
  22 #include <stdio.h>
  23 #include <stdarg.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <string.h>
  27 #include <getopt.h>
  28 #include <syslog.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 int print_devlinks_cb(struct udev_device *udev_device, const char *value, void *data)
  42 {
  43         printf("link:      '%s'\n", value);
  44         return 0;
  45 }
  46
  47 static int print_properties_cb(struct udev_device *udev_device, const char *key, const char *value, void *data)
  48 {
  49         printf("property:  '%s=%s'\n", key, value);
  50         return 0;
  51 }
  52
  53 static void print_device(struct udev_device *device)
  54 {
  55         const char *str;
  56         int count;
  57
  58         printf("*** device: %p ***\n", device);
  59         str = udev_device_get_action(device);
  60         printf("action:    '%s'\n", str);
  61         str = udev_device_get_syspath(device);
  62         printf("syspath:   '%s'\n", str);
  63         str = udev_device_get_devpath(device);
  64         printf("devpath:   '%s'\n", str);
  65         str = udev_device_get_subsystem(device);
  66         printf("subsystem: '%s'\n", str);
  67         str = udev_device_get_driver(device);
  68         printf("driver:    '%s'\n", str);
  69         str = udev_device_get_devname(device);
  70         printf("devname:   '%s'\n", str);
  71         count = udev_device_get_devlinks(device, print_devlinks_cb, NULL);
  72         printf("found %i links\n", count);
  73         count = udev_device_get_properties(device, print_properties_cb, NULL);
  74         printf("found %i properties\n", count);
  75         printf("\n");
  76 }
  77
  78 static int test_device(struct udev *udev, const char *syspath)
  79 {
  80         struct udev_device *device;
  81
  82         printf("looking at device: %s\n", syspath);
  83         device = udev_device_new_from_syspath(udev, syspath);
  84         if (device == NULL) {
  85                 printf("no device\n");
  86                 return -1;
  87         }
  88         print_device(device);
  89         udev_device_unref(device);
  90         return 0;
  91 }
  92
  93 static int test_device_parents(struct udev *udev, const char *syspath)
  94 {
  95         struct udev_device *device;
  96         struct udev_device *device_parent;
  97
  98         printf("looking at device: %s\n", syspath);
  99         device = udev_device_new_from_syspath(udev, syspath);
 100         if (device == NULL)
 101                 return -1;
 102
 103         device_parent = device;
 104         do {
 105                 print_device(device_parent);
 106                 device_parent = udev_device_get_parent(device_parent);
 107         } while (device_parent != NULL);
 108
 109         device_parent = device;
 110         do {
 111                 print_device(device_parent);
 112                 device_parent = udev_device_get_parent(device_parent);
 113         } while (device_parent != NULL);
 114         udev_device_unref(device);
 115
 116         return 0;
 117 }
 118
 119 static int devices_enum_cb(struct udev *udev,
 120                            const char *devpath, const char *subsystem, const char *name,
 121                            void *data)
 122 {
 123         printf("device:    '%s' (%s) '%s'\n", devpath, subsystem, name);
 124         return 0;
 125 }
 126
 127 static int test_enumerate(struct udev *udev, const char *subsystem)
 128 {
 129         int count;
 130
 131         count = udev_enumerate_devices(udev, subsystem, devices_enum_cb, NULL);
 132         printf("found %i devices\n\n", count);
 133         return count;
 134 }
 135
 136 static int test_monitor(struct udev *udev, const char *socket_path)
 137 {
 138         struct udev_monitor *udev_monitor;
 139         fd_set readfds;
 140         int fd;
 141
 142         udev_monitor = udev_monitor_new_from_socket(udev, socket_path);
 143         if (udev_monitor == NULL) {
 144                 printf("no socket\n");
 145                 return -1;
 146         }
 147         if (udev_monitor_enable_receiving(udev_monitor) < 0) {
 148                 printf("bind failed\n");
 149                 return -1;
 150         }
 151
 152         fd = udev_monitor_get_fd(udev_monitor);
 153         FD_ZERO(&readfds);
 154
 155         while (1) {
 156                 struct udev_device *device;
 157                 int fdcount;
 158
 159                 FD_SET(STDIN_FILENO, &readfds);
 160                 FD_SET(fd, &readfds);
 161
 162                 printf("waiting for events on %s, press ENTER to exit\n", socket_path);
 163                 fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
 164                 printf("select fd count: %i\n", fdcount);
 165
 166                 if (FD_ISSET(fd, &readfds)) {
 167                         device = udev_monitor_receive_device(udev_monitor);
 168                         if (device == NULL) {
 169                                 printf("no device from socket\n");
 170                                 continue;
 171                         }
 172                         print_device(device);
 173                         udev_device_unref(device);
 174                 }
 175
 176                 if (FD_ISSET(STDIN_FILENO, &readfds)) {
 177                         printf("exiting loop\n");
 178                         break;
 179                 }
 180         }
 181
 182         udev_monitor_unref(udev_monitor);
 183         return 0;
 184 }
 185
 186 int main(int argc, char *argv[], char *envp[])
 187 {
 188         struct udev *udev = NULL;
 189         static const struct option options[] = {
 190                 { "syspath", 1, NULL, 'p' },
 191                 { "subsystem", 1, NULL, 's' },
 192                 { "socket", 1, NULL, 'S' },
 193                 { "debug", 0, NULL, 'd' },
 194                 { "help", 0, NULL, 'h' },
 195                 { "version", 0, NULL, 'V' },
 196                 {}
 197         };
 198         const char *syspath = "/devices/virtual/mem/null";
 199         const char *subsystem = NULL;
 200         const char *socket = "@/org/kernel/udev/monitor";
 201         char path[1024];
 202         const char *str;
 203
 204         udev = udev_new();
 205         printf("context: %p\n", udev);
 206         if (udev == NULL) {
 207                 printf("no context\n");
 208                 return 1;
 209         }
 210         udev_set_log_fn(udev, log_fn);
 211         printf("set log: %p\n", log_fn);
 212
 213         while (1) {
 214                 int option;
 215
 216                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 217                 if (option == -1)
 218                         break;
 219
 220                 switch (option) {
 221                 case 'p':
 222                         syspath = optarg;
 223                         break;
 224                 case 's':
 225                         subsystem = optarg;
 226                         break;
 227                 case 'S':
 228                         socket = optarg;
 229                         break;
 230                 case 'd':
 231                         if (udev_get_log_priority(udev) < LOG_INFO)
 232                                 udev_set_log_priority(udev, LOG_INFO);
 233                         break;
 234                 case 'h':
 235                         printf("--debug --syspath= --subsystem= --socket= --help\n");
 236                         goto out;
 237                 case 'V':
 238                         printf("%s\n", VERSION);
 239                         goto out;
 240                 default:
 241                         goto out;
 242                 }
 243         }
 244
 245         str = udev_get_sys_path(udev);
 246         printf("sys_path: '%s'\n", str);
 247         str = udev_get_dev_path(udev);
 248         printf("dev_path: '%s'\n", str);
 249
 250         /* add sys path if needed */
 251         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
 252                 snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
 253                 syspath = path;
 254         }
 255
 256         test_device(udev, syspath);
 257         test_device_parents(udev, syspath);
 258         test_enumerate(udev, subsystem);
 259         test_monitor(udev, socket);
 260 out:
 261         udev_unref(udev);
 262         return 0;
 263 }