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