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 {
  32         log_metav(priority, file, line, fn, format, args);
  33 }
  34
  35 static int adm_version(struct udev *udev, int argc, char *argv[])
  36 {
  37         printf("%s\n", VERSION);
  38         return 0;
  39 }
  40
  41 static const struct udevadm_cmd udevadm_version = {
  42         .name = "version",
  43         .cmd = adm_version,
  44 };
  45
  46 static int adm_help(struct udev *udev, int argc, char *argv[]);
  47
  48 static const struct udevadm_cmd udevadm_help = {
  49         .name = "help",
  50         .cmd = adm_help,
  51 };
  52
  53 static const struct udevadm_cmd *udevadm_cmds[] = {
  54         &udevadm_info,
  55         &udevadm_trigger,
  56         &udevadm_settle,
  57         &udevadm_control,
  58         &udevadm_monitor,
  59         &udevadm_hwdb,
  60         &udevadm_test,
  61         &udevadm_test_builtin,
  62         &udevadm_version,
  63         &udevadm_help,
  64 };
  65
  66 static int adm_help(struct udev *udev, int argc, char *argv[])
  67 {
  68         unsigned int i;
  69
  70         fprintf(stderr, "Usage: udevadm [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n");
  71         for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
  72                 if (udevadm_cmds[i]->help != NULL)
  73                         printf("  %-12s %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
  74         fprintf(stderr, "\n");
  75         return 0;
  76 }
  77
  78 static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[])
  79 {
  80         if (cmd->debug)
  81                 log_set_max_level(LOG_DEBUG);
  82         log_debug("calling: %s", cmd->name);
  83         return cmd->cmd(udev, argc, argv);
  84 }
  85
  86 int main(int argc, char *argv[])
  87 {
  88         struct udev *udev;
  89         static const struct option options[] = {
  90                 { "debug", no_argument, NULL, 'd' },
  91                 { "help", no_argument, NULL, 'h' },
  92                 { "version", no_argument, NULL, 'V' },
  93                 {}
  94         };
  95         const char *command;
  96         unsigned int i;
  97         int rc = 1;
  98
  99         udev = udev_new();
 100         if (udev == NULL)
 101                 goto out;
 102
 103         log_parse_environment();
 104         log_open();
 105         udev_set_log_fn(udev, udev_main_log);
 106         label_init("/dev");
 107
 108         for (;;) {
 109                 int option;
 110
 111                 option = getopt_long(argc, argv, "+dhV", options, NULL);
 112                 if (option == -1)
 113                         break;
 114
 115                 switch (option) {
 116                 case 'd':
 117                         log_set_max_level(LOG_DEBUG);
 118                         udev_set_log_priority(udev, LOG_DEBUG);
 119                         break;
 120                 case 'h':
 121                         rc = adm_help(udev, argc, argv);
 122                         goto out;
 123                 case 'V':
 124                         rc = adm_version(udev, argc, argv);
 125                         goto out;
 126                 default:
 127                         goto out;
 128                 }
 129         }
 130         command = argv[optind];
 131
 132         if (command != NULL)
 133                 for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++) {
 134                         if (streq(udevadm_cmds[i]->name, command)) {
 135                                 argc -= optind;
 136                                 argv += optind;
 137                                 /* we need '0' here to reset the internal state */
 138                                 optind = 0;
 139                                 rc = run_command(udev, udevadm_cmds[i], argc, argv);
 140                                 goto out;
 141                         }
 142                 }
 143
 144         fprintf(stderr, "missing or unknown command\n\n");
 145         adm_help(udev, argc, argv);
 146         rc = 2;
 147 out:
 148         label_finish();
 149         udev_unref(udev);
 150         log_close();
 151         return rc;
 152 }