src/udev/udevadm-test.c

   1 /*
   2  * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
   3  * Copyright (C) 2004-2008 Kay Sievers <kay@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 <getopt.h>
  29 #include <sys/signalfd.h>
  30
  31 #include "udev.h"
  32 #include "udev-util.h"
  33
  34 static void help(void) {
  35
  36         printf("%s test OPTIONS <syspath>\n\n"
  37                "Test an event run.\n"
  38                "  -h --help                            Show this help\n"
  39                "     --version                         Show package version\n"
  40                "  -a --action=ACTION                   Set action string\n"
  41                "  -N --resolve-names=early|late|never  When to resolve names\n"
  42                , program_invocation_short_name);
  43 }
  44
  45 static int adm_test(struct udev *udev, int argc, char *argv[]) {
  46         int resolve_names = 1;
  47         char filename[UTIL_PATH_SIZE];
  48         const char *action = "add";
  49         const char *syspath = NULL;
  50         struct udev_list_entry *entry;
  51         _cleanup_udev_rules_unref_ struct udev_rules *rules = NULL;
  52         _cleanup_udev_device_unref_ struct udev_device *dev = NULL;
  53         _cleanup_udev_event_unref_ struct udev_event *event = NULL;
  54         sigset_t mask, sigmask_orig;
  55         int rc = 0, c;
  56
  57         static const struct option options[] = {
  58                 { "action", required_argument, NULL, 'a' },
  59                 { "resolve-names", required_argument, NULL, 'N' },
  60                 { "help", no_argument, NULL, 'h' },
  61                 {}
  62         };
  63
  64         log_debug("version %s", VERSION);
  65
  66         while((c = getopt_long(argc, argv, "a:N:h", options, NULL)) >= 0)
  67                 switch (c) {
  68                 case 'a':
  69                         action = optarg;
  70                         break;
  71                 case 'N':
  72                         if (streq (optarg, "early")) {
  73                                 resolve_names = 1;
  74                         } else if (streq (optarg, "late")) {
  75                                 resolve_names = 0;
  76                         } else if (streq (optarg, "never")) {
  77                                 resolve_names = -1;
  78                         } else {
  79                                 fprintf(stderr, "resolve-names must be early, late or never\n");
  80                                 log_error("resolve-names must be early, late or never");
  81                                 exit(EXIT_FAILURE);
  82                         }
  83                         break;
  84                 case 'h':
  85                         help();
  86                         exit(EXIT_SUCCESS);
  87                 case '?':
  88                         exit(EXIT_FAILURE);
  89                 default:
  90                         assert_not_reached("Unknown option");
  91                 }
  92
  93         syspath = argv[optind];
  94         if (syspath == NULL) {
  95                 fprintf(stderr, "syspath parameter missing\n");
  96                 rc = 2;
  97                 goto out;
  98         }
  99
 100         printf("This program is for debugging only, it does not run any program\n"
 101                "specified by a RUN key. It may show incorrect results, because\n"
 102                "some values may be different, or not available at a simulation run.\n"
 103                "\n");
 104
 105         sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
 106
 107         udev_builtin_init(udev);
 108
 109         rules = udev_rules_new(udev, resolve_names);
 110         if (rules == NULL) {
 111                 fprintf(stderr, "error reading rules\n");
 112                 rc = 3;
 113                 goto out;
 114         }
 115
 116         /* add /sys if needed */
 117         if (!startswith(syspath, "/sys"))
 118                 strscpyl(filename, sizeof(filename), "/sys", syspath, NULL);
 119         else
 120                 strscpy(filename, sizeof(filename), syspath);
 121         util_remove_trailing_chars(filename, '/');
 122
 123         dev = udev_device_new_from_syspath(udev, filename);
 124         if (dev == NULL) {
 125                 fprintf(stderr, "unable to open device '%s'\n", filename);
 126                 rc = 4;
 127                 goto out;
 128         }
 129
 130         /* skip reading of db, but read kernel parameters */
 131         udev_device_set_info_loaded(dev);
 132         udev_device_read_uevent_file(dev);
 133
 134         udev_device_set_action(dev, action);
 135         event = udev_event_new(dev);
 136
 137         sigfillset(&mask);
 138         sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
 139         event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
 140         if (event->fd_signal < 0) {
 141                 fprintf(stderr, "error creating signalfd\n");
 142                 rc = 5;
 143                 goto out;
 144         }
 145
 146         udev_event_execute_rules(event,
 147                                  60 * USEC_PER_SEC, 20 * USEC_PER_SEC,
 148                                  NULL,
 149                                  rules,
 150                                  &sigmask_orig);
 151
 152         udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev))
 153                 printf("%s=%s\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
 154
 155         udev_list_entry_foreach(entry, udev_list_get_entry(&event->run_list)) {
 156                 char program[UTIL_PATH_SIZE];
 157
 158                 udev_event_apply_format(event, udev_list_entry_get_name(entry), program, sizeof(program));
 159                 printf("run: '%s'\n", program);
 160         }
 161 out:
 162         if (event != NULL && event->fd_signal >= 0)
 163                 close(event->fd_signal);
 164         udev_builtin_exit(udev);
 165         return rc;
 166 }
 167
 168 const struct udevadm_cmd udevadm_test = {
 169         .name = "test",
 170         .cmd = adm_test,
 171         .help = "Test an event run",
 172         .debug = true,
 173 };