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