src/udev/udevadm-test.c

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright © 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
   4  */
   5
   6 #include <errno.h>
   7 #include <getopt.h>
   8 #include <signal.h>
   9 #include <stddef.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <sys/signalfd.h>
  13 #include <unistd.h>
  14
  15 #include "string-util.h"
  16 #include "udev.h"
  17 #include "udevadm.h"
  18
  19 static const char *arg_action = "add";
  20 static int arg_resolve_names = 1;
  21 static char arg_syspath[UTIL_PATH_SIZE] = {};
  22
  23 static int help(void) {
  24
  25         printf("%s test [OPTIONS] DEVPATH\n\n"
  26                "Test an event run.\n\n"
  27                "  -h --help                            Show this help\n"
  28                "  -V --version                         Show package version\n"
  29                "  -a --action=ACTION                   Set action string\n"
  30                "  -N --resolve-names=early|late|never  When to resolve names\n"
  31                , program_invocation_short_name);
  32
  33         return 0;
  34 }
  35
  36 static int parse_argv(int argc, char *argv[]) {
  37         static const struct option options[] = {
  38                 { "action",        required_argument, NULL, 'a' },
  39                 { "resolve-names", required_argument, NULL, 'N' },
  40                 { "version",       no_argument,       NULL, 'V' },
  41                 { "help",          no_argument,       NULL, 'h' },
  42                 {}
  43         };
  44
  45         int c;
  46
  47         while ((c = getopt_long(argc, argv, "a:N:Vh", options, NULL)) >= 0)
  48                 switch (c) {
  49                 case 'a':
  50                         arg_action = optarg;
  51                         break;
  52                 case 'N':
  53                         if (streq (optarg, "early")) {
  54                                 arg_resolve_names = 1;
  55                         } else if (streq (optarg, "late")) {
  56                                 arg_resolve_names = 0;
  57                         } else if (streq (optarg, "never")) {
  58                                 arg_resolve_names = -1;
  59                         } else {
  60                                 log_error("resolve-names must be early, late or never");
  61                                 return -EINVAL;
  62                         }
  63                         break;
  64                 case 'V':
  65                         return print_version();
  66                 case 'h':
  67                         return help();
  68                 case '?':
  69                         return -EINVAL;
  70                 default:
  71                         assert_not_reached("Unknown option");
  72                 }
  73
  74         if (!argv[optind]) {
  75                 log_error("syspath parameter missing.");
  76                 return -EINVAL;
  77         }
  78
  79         /* add /sys if needed */
  80         if (!startswith(argv[optind], "/sys"))
  81                 strscpyl(arg_syspath, sizeof(arg_syspath), "/sys", argv[optind], NULL);
  82         else
  83                 strscpy(arg_syspath, sizeof(arg_syspath), argv[optind]);
  84
  85         return 1;
  86 }
  87
  88 int test_main(int argc, char *argv[], void *userdata) {
  89         _cleanup_(udev_rules_unrefp) struct udev_rules *rules = NULL;
  90         _cleanup_(udev_device_unrefp) struct udev_device *dev = NULL;
  91         _cleanup_(udev_event_unrefp) struct udev_event *event = NULL;
  92         struct udev_list_entry *entry;
  93         sigset_t mask, sigmask_orig;
  94         int r;
  95
  96         log_set_max_level(LOG_DEBUG);
  97
  98         r = parse_argv(argc, argv);
  99         if (r <= 0)
 100                 return r;
 101
 102         printf("This program is for debugging only, it does not run any program\n"
 103                "specified by a RUN key. It may show incorrect results, because\n"
 104                "some values may be different, or not available at a simulation run.\n"
 105                "\n");
 106
 107         sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
 108
 109         udev_builtin_init();
 110
 111         rules = udev_rules_new(arg_resolve_names);
 112         if (!rules) {
 113                 log_error("Failed to read udev rules.");
 114                 r = -ENOMEM;
 115                 goto out;
 116         }
 117
 118         dev = udev_device_new_from_synthetic_event(NULL, arg_syspath, arg_action);
 119         if (dev == NULL) {
 120                 r = log_error_errno(errno, "Failed to open device '%s': %m", arg_syspath);
 121                 goto out;
 122         }
 123
 124         /* don't read info from the db */
 125         udev_device_set_info_loaded(dev);
 126
 127         event = udev_event_new(dev);
 128
 129         sigfillset(&mask);
 130         sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
 131
 132         udev_event_execute_rules(event,
 133                                  60 * USEC_PER_SEC, 20 * USEC_PER_SEC,
 134                                  NULL,
 135                                  rules);
 136
 137         udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev))
 138                 printf("%s=%s\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
 139
 140         udev_list_entry_foreach(entry, udev_list_get_entry(&event->run_list)) {
 141                 char program[UTIL_PATH_SIZE];
 142
 143                 udev_event_apply_format(event, udev_list_entry_get_name(entry), program, sizeof(program), false);
 144                 printf("run: '%s'\n", program);
 145         }
 146
 147         r = 0;
 148 out:
 149         udev_builtin_exit();
 150         return r;
 151 }