udev/udevadm.c

   1 /*
   2  * Copyright (C) 2007-2009 Kay Sievers <kay.sievers@vrfy.org>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <unistd.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <stddef.h>
  22 #include <string.h>
  23 #include <errno.h>
  24 #include <getopt.h>
  25
  26 #include "udev.h"
  27
  28 static bool debug;
  29
  30 static void log_fn(struct udev *udev, int priority,
  31                    const char *file, int line, const char *fn,
  32                    const char *format, va_list args)
  33 {
  34         if (debug) {
  35                 fprintf(stderr, "%s: ", fn);
  36                 vfprintf(stderr, format, args);
  37         } else {
  38                 va_list args2;
  39
  40                 va_copy(args2, args);
  41                 vfprintf(stderr, format, args2);
  42                 va_end(args2);
  43                 vsyslog(priority, format, args);
  44         }
  45 }
  46
  47 static int adm_version(struct udev *udev, int argc, char *argv[])
  48 {
  49         printf("%s\n", VERSION);
  50         return 0;
  51 }
  52 static const struct udevadm_cmd udevadm_version = {
  53         .name = "version",
  54         .cmd = adm_version,
  55 };
  56
  57 static int adm_help(struct udev *udev, int argc, char *argv[]);
  58 static const struct udevadm_cmd udevadm_help = {
  59         .name = "help",
  60         .cmd = adm_help,
  61 };
  62
  63 static const struct udevadm_cmd *udevadm_cmds[] = {
  64         &udevadm_info,
  65         &udevadm_trigger,
  66         &udevadm_settle,
  67         &udevadm_control,
  68         &udevadm_monitor,
  69         &udevadm_test,
  70         &udevadm_test_builtin,
  71         &udevadm_version,
  72         &udevadm_help,
  73 };
  74
  75 static int adm_help(struct udev *udev, int argc, char *argv[])
  76 {
  77         unsigned int i;
  78
  79         fprintf(stderr, "Usage: udevadm [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n");
  80         for (i = 0; i < ARRAY_SIZE(udevadm_cmds); i++)
  81                 if (udevadm_cmds[i]->help != NULL)
  82                         printf("  %-12s %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
  83         fprintf(stderr, "\n");
  84         return 0;
  85 }
  86
  87 static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[])
  88 {
  89         if (cmd->debug) {
  90                 debug = true;
  91                 if (udev_get_log_priority(udev) < LOG_INFO)
  92                         udev_set_log_priority(udev, LOG_INFO);
  93         }
  94         info(udev, "calling: %s\n", cmd->name);
  95         return cmd->cmd(udev, argc, argv);
  96 }
  97
  98 int main(int argc, char *argv[])
  99 {
 100         struct udev *udev;
 101         static const struct option options[] = {
 102                 { "debug", no_argument, NULL, 'd' },
 103                 { "help", no_argument, NULL, 'h' },
 104                 { "version", no_argument, NULL, 'V' },
 105                 {}
 106         };
 107         const char *command;
 108         unsigned int i;
 109         int rc = 1;
 110
 111         udev = udev_new();
 112         if (udev == NULL)
 113                 goto out;
 114
 115         udev_log_init("udevadm");
 116         udev_set_log_fn(udev, log_fn);
 117         udev_selinux_init(udev);
 118
 119         for (;;) {
 120                 int option;
 121
 122                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 123                 if (option == -1)
 124                         break;
 125
 126                 switch (option) {
 127                 case 'd':
 128                         debug = true;
 129                         if (udev_get_log_priority(udev) < LOG_INFO)
 130                                 udev_set_log_priority(udev, LOG_INFO);
 131                         break;
 132                 case 'h':
 133                         rc = adm_help(udev, argc, argv);
 134                         goto out;
 135                 case 'V':
 136                         rc = adm_version(udev, argc, argv);
 137                         goto out;
 138                 default:
 139                         goto out;
 140                 }
 141         }
 142         command = argv[optind];
 143
 144         info(udev, "runtime dir '%s'\n", udev_get_run_path(udev));
 145
 146         if (command != NULL)
 147                 for (i = 0; i < ARRAY_SIZE(udevadm_cmds); i++) {
 148                         if (strcmp(udevadm_cmds[i]->name, command) == 0) {
 149                                 argc -= optind;
 150                                 argv += optind;
 151                                 optind = 0;
 152                                 rc = run_command(udev, udevadm_cmds[i], argc, argv);
 153                                 goto out;
 154                         }
 155                 }
 156
 157         fprintf(stderr, "missing or unknown command\n\n");
 158         adm_help(udev, argc, argv);
 159         rc = 2;
 160 out:
 161         udev_selinux_exit(udev);
 162         udev_unref(udev);
 163         udev_log_close();
 164         return rc;
 165 }