src/udev/udevadm.c

   1 /*
   2  * Copyright (C) 2007-2012 Kay Sievers <kay@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 void udev_main_log(struct udev *udev, int priority,
  29                    const char *file, int line, const char *fn,
  30                    const char *format, va_list args) {
  31         log_metav(priority, file, line, fn, format, args);
  32 }
  33
  34 static int adm_version(struct udev *udev, int argc, char *argv[]) {
  35         printf("%s\n", VERSION);
  36         return 0;
  37 }
  38
  39 static const struct udevadm_cmd udevadm_version = {
  40         .name = "version",
  41         .cmd = adm_version,
  42 };
  43
  44 static int adm_help(struct udev *udev, int argc, char *argv[]);
  45
  46 static const struct udevadm_cmd udevadm_help = {
  47         .name = "help",
  48         .cmd = adm_help,
  49 };
  50
  51 static const struct udevadm_cmd *udevadm_cmds[] = {
  52         &udevadm_info,
  53         &udevadm_trigger,
  54         &udevadm_settle,
  55         &udevadm_control,
  56         &udevadm_monitor,
  57         &udevadm_hwdb,
  58         &udevadm_test,
  59         &udevadm_test_builtin,
  60         &udevadm_version,
  61         &udevadm_help,
  62 };
  63
  64 static int adm_help(struct udev *udev, int argc, char *argv[]) {
  65         unsigned int i;
  66
  67         fprintf(stderr, "Usage: udevadm [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n");
  68         for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
  69                 if (udevadm_cmds[i]->help != NULL)
  70                         printf("  %-12s %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
  71         fprintf(stderr, "\n");
  72         return 0;
  73 }
  74
  75 static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[]) {
  76         if (cmd->debug)
  77                 log_set_max_level(LOG_DEBUG);
  78         log_debug("calling: %s", cmd->name);
  79         return cmd->cmd(udev, argc, argv);
  80 }
  81
  82 int main(int argc, char *argv[]) {
  83         struct udev *udev;
  84         static const struct option options[] = {
  85                 { "debug", no_argument, NULL, 'd' },
  86                 { "help", no_argument, NULL, 'h' },
  87                 { "version", no_argument, NULL, 'V' },
  88                 {}
  89         };
  90         const char *command;
  91         unsigned int i;
  92         int rc = 1;
  93
  94         udev = udev_new();
  95         if (udev == NULL)
  96                 goto out;
  97
  98         log_parse_environment();
  99         log_open();
 100         udev_set_log_fn(udev, udev_main_log);
 101         label_init("/dev");
 102
 103         for (;;) {
 104                 int option;
 105
 106                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 107                 if (option == -1)
 108                         break;
 109
 110                 switch (option) {
 111                 case 'd':
 112                         log_set_max_level(LOG_DEBUG);
 113                         udev_set_log_priority(udev, LOG_DEBUG);
 114                         break;
 115                 case 'h':
 116                         rc = adm_help(udev, argc, argv);
 117                         goto out;
 118                 case 'V':
 119                         rc = adm_version(udev, argc, argv);
 120                         goto out;
 121                 default:
 122                         goto out;
 123                 }
 124         }
 125         command = argv[optind];
 126
 127         if (command != NULL)
 128                 for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++) {
 129                         if (streq(udevadm_cmds[i]->name, command)) {
 130                                 argc -= optind;
 131                                 argv += optind;
 132                                 /* we need '0' here to reset the internal state */
 133                                 optind = 0;
 134                                 rc = run_command(udev, udevadm_cmds[i], argc, argv);
 135                                 goto out;
 136                         }
 137                 }
 138
 139         fprintf(stderr, "missing or unknown command\n\n");
 140         adm_help(udev, argc, argv);
 141         rc = 2;
 142 out:
 143         label_finish();
 144         udev_unref(udev);
 145         log_close();
 146         return rc;
 147 }