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 void udev_main_log(struct udev *udev, int priority,
  30                    const char *file, int line, const char *fn,
  31                    const char *format, va_list args) {
  32         log_metav(priority, file, line, fn, format, args);
  33 }
  34
  35 static int adm_version(struct udev *udev, int argc, char *argv[]) {
  36         printf("%s\n", VERSION);
  37         return 0;
  38 }
  39
  40 static const struct udevadm_cmd udevadm_version = {
  41         .name = "version",
  42         .cmd = adm_version,
  43 };
  44
  45 static int adm_help(struct udev *udev, int argc, char *argv[]);
  46
  47 static const struct udevadm_cmd udevadm_help = {
  48         .name = "help",
  49         .cmd = adm_help,
  50 };
  51
  52 static const struct udevadm_cmd *udevadm_cmds[] = {
  53         &udevadm_info,
  54         &udevadm_trigger,
  55         &udevadm_settle,
  56         &udevadm_control,
  57         &udevadm_monitor,
  58         &udevadm_hwdb,
  59         &udevadm_test,
  60         &udevadm_test_builtin,
  61         &udevadm_version,
  62         &udevadm_help,
  63 };
  64
  65 static int adm_help(struct udev *udev, int argc, char *argv[]) {
  66         unsigned int i;
  67
  68         fprintf(stderr, "Usage: udevadm [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n");
  69         for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
  70                 if (udevadm_cmds[i]->help != NULL)
  71                         printf("  %-12s %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
  72         fprintf(stderr, "\n");
  73         return 0;
  74 }
  75
  76 static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[]) {
  77         if (cmd->debug)
  78                 log_set_max_level(LOG_DEBUG);
  79         log_debug("calling: %s", cmd->name);
  80         return cmd->cmd(udev, argc, argv);
  81 }
  82
  83 int main(int argc, char *argv[]) {
  84         struct udev *udev;
  85         static const struct option options[] = {
  86                 { "debug", no_argument, NULL, 'd' },
  87                 { "help", no_argument, NULL, 'h' },
  88                 { "version", no_argument, NULL, 'V' },
  89                 {}
  90         };
  91         const char *command;
  92         unsigned int i;
  93         int rc = 1, c;
  94
  95         udev = udev_new();
  96         if (udev == NULL)
  97                 goto out;
  98
  99         log_parse_environment();
 100         log_open();
 101         udev_set_log_fn(udev, udev_main_log);
 102         label_init("/dev");
 103
 104         while ((c = getopt_long(argc, argv, "+dhV", options, NULL)) >= 0)
 105                 switch (c) {
 106
 107                 case 'd':
 108                         log_set_max_level(LOG_DEBUG);
 109                         udev_set_log_priority(udev, LOG_DEBUG);
 110                         break;
 111
 112                 case 'h':
 113                         rc = adm_help(udev, argc, argv);
 114                         goto out;
 115
 116                 case 'V':
 117                         rc = adm_version(udev, argc, argv);
 118                         goto out;
 119
 120                 default:
 121                         goto out;
 122                 }
 123
 124         command = argv[optind];
 125
 126         if (command != NULL)
 127                 for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
 128                         if (streq(udevadm_cmds[i]->name, command)) {
 129                                 argc -= optind;
 130                                 argv += optind;
 131                                 /* we need '0' here to reset the internal state */
 132                                 optind = 0;
 133                                 rc = run_command(udev, udevadm_cmds[i], argc, argv);
 134                                 goto out;
 135                         }
 136
 137         fprintf(stderr, "%s: missing or unknown command", program_invocation_short_name);
 138         rc = 2;
 139 out:
 140         label_finish();
 141         udev_unref(udev);
 142         log_close();
 143         return rc;
 144 }