src/udev/udevadm.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2 /*
   3  * Copyright (C) 2007-2012 Kay Sievers <kay@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 <errno.h>
  20 #include <getopt.h>
  21 #include <stddef.h>
  22 #include <stdio.h>
  23
  24 #include "selinux-util.h"
  25 #include "string-util.h"
  26 #include "udev.h"
  27
  28 static int adm_version(struct udev *udev, int argc, char *argv[]) {
  29         printf("%s\n", VERSION);
  30         return 0;
  31 }
  32
  33 static const struct udevadm_cmd udevadm_version = {
  34         .name = "version",
  35         .cmd = adm_version,
  36 };
  37
  38 static int adm_help(struct udev *udev, int argc, char *argv[]);
  39
  40 static const struct udevadm_cmd udevadm_help = {
  41         .name = "help",
  42         .cmd = adm_help,
  43 };
  44
  45 static const struct udevadm_cmd *udevadm_cmds[] = {
  46         &udevadm_info,
  47         &udevadm_trigger,
  48         &udevadm_settle,
  49         &udevadm_control,
  50         &udevadm_monitor,
  51         &udevadm_hwdb,
  52         &udevadm_test,
  53         &udevadm_test_builtin,
  54         &udevadm_version,
  55         &udevadm_help,
  56 };
  57
  58 static int adm_help(struct udev *udev, int argc, char *argv[]) {
  59         unsigned int i;
  60
  61         printf("%s [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n\n"
  62                "Send control commands or test the device manager.\n\n"
  63                "Commands:\n"
  64                , program_invocation_short_name);
  65
  66         for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
  67                 if (udevadm_cmds[i]->help != NULL)
  68                         printf("  %-12s  %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
  69         return 0;
  70 }
  71
  72 static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[]) {
  73         if (cmd->debug)
  74                 log_set_max_level(LOG_DEBUG);
  75         log_debug("calling: %s", cmd->name);
  76         return cmd->cmd(udev, argc, argv);
  77 }
  78
  79 int main(int argc, char *argv[]) {
  80         struct udev *udev;
  81         static const struct option options[] = {
  82                 { "debug", no_argument, NULL, 'd' },
  83                 { "help", no_argument, NULL, 'h' },
  84                 { "version", no_argument, NULL, 'V' },
  85                 {}
  86         };
  87         const char *command;
  88         unsigned int i;
  89         int rc = 1, c;
  90
  91         udev = udev_new();
  92         if (udev == NULL)
  93                 goto out;
  94
  95         log_parse_environment();
  96         log_open();
  97         mac_selinux_init("/dev");
  98
  99         while ((c = getopt_long(argc, argv, "+dhV", options, NULL)) >= 0)
 100                 switch (c) {
 101
 102                 case 'd':
 103                         log_set_max_level(LOG_DEBUG);
 104                         break;
 105
 106                 case 'h':
 107                         rc = adm_help(udev, argc, argv);
 108                         goto out;
 109
 110                 case 'V':
 111                         rc = adm_version(udev, argc, argv);
 112                         goto out;
 113
 114                 default:
 115                         goto out;
 116                 }
 117
 118         command = argv[optind];
 119
 120         if (command != NULL)
 121                 for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
 122                         if (streq(udevadm_cmds[i]->name, command)) {
 123                                 argc -= optind;
 124                                 argv += optind;
 125                                 /* we need '0' here to reset the internal state */
 126                                 optind = 0;
 127                                 rc = run_command(udev, udevadm_cmds[i], argc, argv);
 128                                 goto out;
 129                         }
 130
 131         fprintf(stderr, "%s: missing or unknown command\n", program_invocation_short_name);
 132         rc = 2;
 133 out:
 134         mac_selinux_finish();
 135         udev_unref(udev);
 136         log_close();
 137         return rc;
 138 }