src/udev/udevadm-test.c

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
   4  * Copyright (C) 2004-2008 Kay Sievers <kay@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 <errno.h>
  21 #include <getopt.h>
  22 #include <signal.h>
  23 #include <stddef.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <sys/signalfd.h>
  27 #include <unistd.h>
  28
  29 #include "string-util.h"
  30 #include "udev-util.h"
  31 #include "udev.h"
  32 #include "udevadm-util.h"
  33
  34 static void help(void) {
  35
  36         printf("%s test [OPTIONS] DEVPATH\n\n"
  37                "Test an event run.\n\n"
  38                "  -h --help                            Show this help\n"
  39                "  -V --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_unrefp) struct udev_rules *rules = NULL;
  52         _cleanup_(udev_device_unrefp) struct udev_device *dev = NULL;
  53         _cleanup_(udev_event_unrefp) 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                 { "version",       no_argument,       NULL, 'V' },
  61                 { "help",          no_argument,       NULL, 'h' },
  62                 {}
  63         };
  64
  65         log_debug("version %s", PACKAGE_VERSION);
  66
  67         while ((c = getopt_long(argc, argv, "a:N:Vh", options, NULL)) >= 0)
  68                 switch (c) {
  69                 case 'a':
  70                         action = optarg;
  71                         break;
  72                 case 'N':
  73                         if (streq (optarg, "early")) {
  74                                 resolve_names = 1;
  75                         } else if (streq (optarg, "late")) {
  76                                 resolve_names = 0;
  77                         } else if (streq (optarg, "never")) {
  78                                 resolve_names = -1;
  79                         } else {
  80                                 fprintf(stderr, "resolve-names must be early, late or never\n");
  81                                 log_error("resolve-names must be early, late or never");
  82                                 exit(EXIT_FAILURE);
  83                         }
  84                         break;
  85                 case 'V':
  86                         print_version();
  87                         exit(EXIT_SUCCESS);
  88                 case 'h':
  89                         help();
  90                         exit(EXIT_SUCCESS);
  91                 case '?':
  92                         exit(EXIT_FAILURE);
  93                 default:
  94                         assert_not_reached("Unknown option");
  95                 }
  96
  97         syspath = argv[optind];
  98         if (syspath == NULL) {
  99                 fprintf(stderr, "syspath parameter missing\n");
 100                 rc = 2;
 101                 goto out;
 102         }
 103
 104         printf("This program is for debugging only, it does not run any program\n"
 105                "specified by a RUN key. It may show incorrect results, because\n"
 106                "some values may be different, or not available at a simulation run.\n"
 107                "\n");
 108
 109         sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
 110
 111         udev_builtin_init(udev);
 112
 113         rules = udev_rules_new(udev, resolve_names);
 114         if (rules == NULL) {
 115                 fprintf(stderr, "error reading rules\n");
 116                 rc = 3;
 117                 goto out;
 118         }
 119
 120         /* add /sys if needed */
 121         if (!startswith(syspath, "/sys"))
 122                 strscpyl(filename, sizeof(filename), "/sys", syspath, NULL);
 123         else
 124                 strscpy(filename, sizeof(filename), syspath);
 125         delete_trailing_chars(filename, "/");
 126
 127         dev = udev_device_new_from_synthetic_event(udev, filename, action);
 128         if (dev == NULL) {
 129                 fprintf(stderr, "unable to open device '%s'\n", filename);
 130                 rc = 4;
 131                 goto out;
 132         }
 133
 134         /* don't read info from the db */
 135         udev_device_set_info_loaded(dev);
 136
 137         event = udev_event_new(dev);
 138
 139         sigfillset(&mask);
 140         sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
 141
 142         udev_event_execute_rules(event,
 143                                  60 * USEC_PER_SEC, 20 * USEC_PER_SEC,
 144                                  NULL,
 145                                  rules);
 146
 147         udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev))
 148                 printf("%s=%s\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
 149
 150         udev_list_entry_foreach(entry, udev_list_get_entry(&event->run_list)) {
 151                 char program[UTIL_PATH_SIZE];
 152
 153                 udev_event_apply_format(event, udev_list_entry_get_name(entry), program, sizeof(program), false);
 154                 printf("run: '%s'\n", program);
 155         }
 156 out:
 157         udev_builtin_exit(udev);
 158         return rc;
 159 }
 160
 161 const struct udevadm_cmd udevadm_test = {
 162         .name = "test",
 163         .cmd = adm_test,
 164         .help = "Test an event run",
 165         .debug = true,
 166 };