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