src/udev/udevadm.c

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2
   3 #include <errno.h>
   4 #include <getopt.h>
   5 #include <stddef.h>
   6 #include <stdio.h>
   7
   8 #include "selinux-util.h"
   9 #include "string-util.h"
  10 #include "terminal-util.h"
  11 #include "udev-util.h"
  12 #include "udev.h"
  13
  14 static int adm_version(struct udev *udev, int argc, char *argv[]) {
  15         printf("%s\n", PACKAGE_VERSION);
  16         return 0;
  17 }
  18
  19 static const struct udevadm_cmd udevadm_version = {
  20         .name = "version",
  21         .cmd = adm_version,
  22 };
  23
  24 static int adm_help(struct udev *udev, int argc, char *argv[]);
  25
  26 static const struct udevadm_cmd udevadm_help = {
  27         .name = "help",
  28         .cmd = adm_help,
  29 };
  30
  31 static const struct udevadm_cmd *udevadm_cmds[] = {
  32         &udevadm_info,
  33         &udevadm_trigger,
  34         &udevadm_settle,
  35         &udevadm_control,
  36         &udevadm_monitor,
  37         &udevadm_hwdb,
  38         &udevadm_test,
  39         &udevadm_test_builtin,
  40         &udevadm_version,
  41         &udevadm_help,
  42 };
  43
  44 static int adm_help(struct udev *udev, int argc, char *argv[]) {
  45         _cleanup_free_ char *link = NULL;
  46         size_t i;
  47         int r;
  48
  49         r = terminal_urlify_man("udevadm", "8", &link);
  50         if (r < 0)
  51                 return log_oom();
  52
  53         printf("%s [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n\n"
  54                "Send control commands or test the device manager.\n\n"
  55                "Commands:\n"
  56                , program_invocation_short_name);
  57
  58         for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
  59                 if (udevadm_cmds[i]->help != NULL)
  60                         printf("  %-12s  %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
  61
  62         printf("\nSee the %s for details.\n", link);
  63         return 0;
  64 }
  65
  66 static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[]) {
  67         if (cmd->debug)
  68                 log_set_max_level(LOG_DEBUG);
  69         log_debug("calling: %s", cmd->name);
  70         return cmd->cmd(udev, argc, argv);
  71 }
  72
  73 int main(int argc, char *argv[]) {
  74         struct udev *udev;
  75         static const struct option options[] = {
  76                 { "debug", no_argument, NULL, 'd' },
  77                 { "help", no_argument, NULL, 'h' },
  78                 { "version", no_argument, NULL, 'V' },
  79                 {}
  80         };
  81         const char *command;
  82         unsigned int i;
  83         int rc = 1, c;
  84
  85         udev_parse_config();
  86         log_parse_environment();
  87         log_open();
  88
  89         mac_selinux_init();
  90
  91         udev = udev_new();
  92         if (udev == NULL)
  93                 goto out;
  94
  95         while ((c = getopt_long(argc, argv, "+dhV", options, NULL)) >= 0)
  96                 switch (c) {
  97
  98                 case 'd':
  99                         log_set_max_level(LOG_DEBUG);
 100                         break;
 101
 102                 case 'h':
 103                         rc = adm_help(udev, argc, argv);
 104                         goto out;
 105
 106                 case 'V':
 107                         rc = adm_version(udev, argc, argv);
 108                         goto out;
 109
 110                 default:
 111                         goto out;
 112                 }
 113
 114         command = argv[optind];
 115
 116         if (command != NULL)
 117                 for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
 118                         if (streq(udevadm_cmds[i]->name, command)) {
 119                                 argc -= optind;
 120                                 argv += optind;
 121                                 /* we need '0' here to reset the internal state */
 122                                 optind = 0;
 123                                 rc = run_command(udev, udevadm_cmds[i], argc, argv);
 124                                 goto out;
 125                         }
 126
 127         fprintf(stderr, "%s: missing or unknown command\n", program_invocation_short_name);
 128         rc = 2;
 129 out:
 130         mac_selinux_finish();
 131         udev_unref(udev);
 132         log_close();
 133         return rc;
 134 }