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