src/udev/udevadm-test.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   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 "sd-device.h"
  16
  17 #include "device-private.h"
  18 #include "device-util.h"
  19 #include "path-util.h"
  20 #include "string-util.h"
  21 #include "strxcpyx.h"
  22 #include "udev-builtin.h"
  23 #include "udev-event.h"
  24 #include "udevadm-util.h"
  25 #include "udevadm.h"
  26
  27 static sd_device_action_t arg_action = SD_DEVICE_ADD;
  28 static ResolveNameTiming arg_resolve_name_timing = RESOLVE_NAME_EARLY;
  29 static const char *arg_syspath = NULL;
  30
  31 static int help(void) {
  32
  33         printf("%s test [OPTIONS] DEVPATH\n\n"
  34                "Test an event run.\n\n"
  35                "  -h --help                            Show this help\n"
  36                "  -V --version                         Show package version\n"
  37                "  -a --action=ACTION|help              Set action string\n"
  38                "  -N --resolve-names=early|late|never  When to resolve names\n",
  39                program_invocation_short_name);
  40
  41         return 0;
  42 }
  43
  44 static int parse_argv(int argc, char *argv[]) {
  45         static const struct option options[] = {
  46                 { "action",        required_argument, NULL, 'a' },
  47                 { "resolve-names", required_argument, NULL, 'N' },
  48                 { "version",       no_argument,       NULL, 'V' },
  49                 { "help",          no_argument,       NULL, 'h' },
  50                 {}
  51         };
  52
  53         int r, c;
  54
  55         while ((c = getopt_long(argc, argv, "a:N:Vh", options, NULL)) >= 0)
  56                 switch (c) {
  57                 case 'a':
  58                         r = parse_device_action(optarg, &arg_action);
  59                         if (r < 0)
  60                                 return log_error_errno(r, "Invalid action '%s'", optarg);
  61                         if (r == 0)
  62                                 return 0;
  63                         break;
  64                 case 'N':
  65                         arg_resolve_name_timing = resolve_name_timing_from_string(optarg);
  66                         if (arg_resolve_name_timing < 0)
  67                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
  68                                                        "--resolve-names= must be early, late or never");
  69                         break;
  70                 case 'V':
  71                         return print_version();
  72                 case 'h':
  73                         return help();
  74                 case '?':
  75                         return -EINVAL;
  76                 default:
  77                         assert_not_reached();
  78                 }
  79
  80         arg_syspath = argv[optind];
  81         if (!arg_syspath)
  82                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "syspath parameter missing.");
  83
  84         return 1;
  85 }
  86
  87 int test_main(int argc, char *argv[], void *userdata) {
  88         _cleanup_(udev_rules_freep) UdevRules *rules = NULL;
  89         _cleanup_(udev_event_freep) UdevEvent *event = NULL;
  90         _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
  91         const char *cmd;
  92         sigset_t mask, sigmask_orig;
  93         void *val;
  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         assert_se(sigprocmask(SIG_SETMASK, NULL, &sigmask_orig) >= 0);
 108
 109         udev_builtin_init();
 110
 111         r = udev_rules_load(&rules, arg_resolve_name_timing);
 112         if (r < 0) {
 113                 log_error_errno(r, "Failed to read udev rules: %m");
 114                 goto out;
 115         }
 116
 117         r = find_device_with_action(arg_syspath, arg_action, &dev);
 118         if (r < 0) {
 119                 log_error_errno(r, "Failed to open device '%s': %m", arg_syspath);
 120                 goto out;
 121         }
 122
 123         /* don't read info from the db */
 124         device_seal(dev);
 125
 126         event = udev_event_new(dev, 0, NULL, LOG_DEBUG);
 127
 128         assert_se(sigfillset(&mask) >= 0);
 129         assert_se(sigprocmask(SIG_SETMASK, &mask, &sigmask_orig) >= 0);
 130
 131         udev_event_execute_rules(event, -1, 60 * USEC_PER_SEC, SIGKILL, NULL, rules);
 132
 133         FOREACH_DEVICE_PROPERTY(dev, key, value)
 134                 printf("%s=%s\n", key, value);
 135
 136         ORDERED_HASHMAP_FOREACH_KEY(val, cmd, event->run_list) {
 137                 char program[UDEV_PATH_SIZE];
 138                 bool truncated;
 139
 140                 (void) udev_event_apply_format(event, cmd, program, sizeof(program), false, &truncated);
 141                 if (truncated)
 142                         log_warning("The command '%s' is truncated while substituting into '%s'.", program, cmd);
 143                 printf("run: '%s'\n", program);
 144         }
 145
 146         r = 0;
 147 out:
 148         udev_builtin_exit();
 149         return r;
 150 }