udev/udevadm-test.c

   1 /*
   2  * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
   3  * Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <stdio.h>
  22 #include <stddef.h>
  23 #include <unistd.h>
  24 #include <errno.h>
  25 #include <ctype.h>
  26 #include <fcntl.h>
  27 #include <signal.h>
  28 #include <syslog.h>
  29 #include <getopt.h>
  30
  31 #include "udev.h"
  32
  33 int udevadm_test(struct udev *udev, int argc, char *argv[])
  34 {
  35         char filename[UTIL_PATH_SIZE];
  36         const char *action = "add";
  37         const char *syspath = NULL;
  38         struct udev_event *event;
  39         struct udev_device *dev;
  40         struct udev_rules *rules = NULL;
  41         int err;
  42         int rc = 0;
  43
  44         static const struct option options[] = {
  45                 { "action", required_argument, NULL, 'a' },
  46                 { "help", no_argument, NULL, 'h' },
  47                 {}
  48         };
  49
  50         info(udev, "version %s\n", VERSION);
  51
  52         while (1) {
  53                 int option;
  54
  55                 option = getopt_long(argc, argv, "a:s:fh", options, NULL);
  56                 if (option == -1)
  57                         break;
  58
  59                 dbg(udev, "option '%c'\n", option);
  60                 switch (option) {
  61                 case 'a':
  62                         action = optarg;
  63                         break;
  64                 case 'h':
  65                         printf("Usage: udevadm test OPTIONS <syspath>\n"
  66                                "  --action=<string>     set action string\n"
  67                                "  --help\n\n");
  68                         exit(0);
  69                 default:
  70                         exit(1);
  71                 }
  72         }
  73         syspath = argv[optind];
  74
  75         if (syspath == NULL) {
  76                 fprintf(stderr, "syspath parameter missing\n");
  77                 rc = 1;
  78                 goto exit;
  79         }
  80
  81         printf("This program is for debugging only, it does not run any program,\n"
  82                "specified by a RUN key. It may show incorrect results, because\n"
  83                "some values may be different, or not available at a simulation run.\n"
  84                "\n");
  85
  86         rules = udev_rules_new(udev, 1);
  87         if (rules == NULL) {
  88                 fprintf(stderr, "error reading rules\n");
  89                 rc = 1;
  90                 goto exit;
  91         }
  92
  93         /* add /sys if needed */
  94         if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
  95                 util_strlcpy(filename, udev_get_sys_path(udev), sizeof(filename));
  96                 util_strlcat(filename, syspath, sizeof(filename));
  97         } else {
  98                 util_strlcpy(filename, syspath, sizeof(filename));
  99         }
 100         util_remove_trailing_chars(filename, '/');
 101
 102         dev = udev_device_new_from_syspath(udev, filename);
 103         if (dev == NULL) {
 104                 fprintf(stderr, "unable to open device '%s'\n", filename);
 105                 rc = 2;
 106                 goto exit;
 107         }
 108
 109         /* skip reading of db, but read kernel parameters */
 110         udev_device_set_info_loaded(dev);
 111         udev_device_read_uevent_file(dev);
 112
 113         udev_device_set_action(dev, action);
 114         event = udev_event_new(dev);
 115         err = udev_event_execute_rules(event, rules);
 116
 117         if (udev_device_get_event_timeout(dev) >= 0)
 118                 info(udev, "custom event timeout: %i\n", udev_device_get_event_timeout(dev));
 119
 120         if (err == 0 && !event->ignore_device && udev_get_run(udev)) {
 121                 struct udev_list_entry *entry;
 122
 123                 udev_list_entry_foreach(entry, udev_list_get_entry(&event->run_list)) {
 124                         char program[UTIL_PATH_SIZE];
 125
 126                         util_strlcpy(program, udev_list_entry_get_name(entry), sizeof(program));
 127                         udev_event_apply_format(event, program, sizeof(program));
 128                         info(udev, "run: '%s'\n", program);
 129                 }
 130         }
 131         udev_event_unref(event);
 132         udev_device_unref(dev);
 133 exit:
 134         udev_rules_unref(rules);
 135         return rc;
 136 }