udev/udevadm-control.c

   1 /*
   2  * Copyright (C) 2005-2006 Kay Sievers <kay.sievers@vrfy.org>
   3  *
   4  *      This program is free software; you can redistribute it and/or modify it
   5  *      under the terms of the GNU General Public License as published by the
   6  *      Free Software Foundation version 2 of the License.
   7  *
   8  *      This program is distributed in the hope that it will be useful, but
   9  *      WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  *      General Public License for more details.
  12  *
  13  *      You should have received a copy of the GNU General Public License along
  14  *      with this program; if not, write to the Free Software Foundation, Inc.,
  15  *      51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16  *
  17  */
  18
  19 #include "config.h"
  20
  21 #include <time.h>
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <stddef.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <getopt.h>
  29 #include <sys/types.h>
  30 #include <sys/socket.h>
  31 #include <sys/wait.h>
  32 #include <sys/un.h>
  33
  34 #include "udev.h"
  35 #include "udevd.h"
  36
  37 static int udev_log = 0;
  38
  39 int udevadm_control(int argc, char *argv[])
  40 {
  41         struct udev_ctrl *uctrl;
  42         const char *env;
  43         int rc = 1;
  44
  45         /* compat values with '_' will be removed in a future release */
  46         static const struct option options[] = {
  47                 { "log-priority", 1, NULL, 'l' },
  48                 { "log_priority", 1, NULL, 'l' + 256 },
  49                 { "stop-exec-queue", 0, NULL, 's' },
  50                 { "stop_exec_queue", 0, NULL, 's' + 256 },
  51                 { "start-exec-queue", 0, NULL, 'S' },
  52                 { "start_exec_queue", 0, NULL, 'S' + 256},
  53                 { "reload-rules", 0, NULL, 'R' },
  54                 { "reload_rules", 0, NULL, 'R' + 256},
  55                 { "env", 1, NULL, 'e' },
  56                 { "max-childs", 1, NULL, 'm' },
  57                 { "max_childs", 1, NULL, 'm' + 256},
  58                 { "max-childs-running", 1, NULL, 'M' },
  59                 { "max_childs_running", 1, NULL, 'M' + 256},
  60                 { "help", 0, NULL, 'h' },
  61                 {}
  62         };
  63
  64         env = getenv("UDEV_LOG");
  65         if (env)
  66                 udev_log = log_priority(env);
  67
  68         logging_init("udevcontrol");
  69         dbg("version %s\n", VERSION);
  70
  71         if (getuid() != 0) {
  72                 fprintf(stderr, "root privileges required\n");
  73                 goto exit;
  74         }
  75
  76         uctrl = udev_ctrl_new_from_socket(UDEVD_CTRL_SOCK_PATH);
  77         if (uctrl == NULL)
  78                 goto exit;
  79
  80         while (1) {
  81                 int option;
  82                 int i;
  83                 char *endp;
  84
  85                 option = getopt_long(argc, argv, "l:sSRe:m:M:h", options, NULL);
  86                 if (option == -1)
  87                         break;
  88
  89                 if (option > 255) {
  90                         info("udevadm control expects commands without underscore, "
  91                             "this will stop working in a future release\n");
  92                         fprintf(stderr, "udevadm control expects commands without underscore, "
  93                                 "this will stop working in a future release\n");
  94                 }
  95
  96                 switch (option) {
  97                 case 'l':
  98                 case 'l' + 256:
  99                         i = log_priority(optarg);
 100                         if (i < 0) {
 101                                 fprintf(stderr, "invalid number '%s'\n", optarg);
 102                                 goto exit;
 103                         }
 104                         udev_ctrl_set_log_level(uctrl, log_priority(optarg));
 105                         break;
 106                 case 's':
 107                 case 's' + 256:
 108                         udev_ctrl_stop_exec_queue(uctrl);
 109                         break;
 110                 case 'S':
 111                 case 'S' + 256:
 112                         udev_ctrl_start_exec_queue(uctrl);
 113                         break;
 114                 case 'R':
 115                 case 'R' + 256:
 116                         udev_ctrl_reload_rules(uctrl);
 117                         break;
 118                 case 'e':
 119                         if (strchr(optarg, '=') == NULL) {
 120                                 fprintf(stderr, "expect <KEY>=<valaue> instead of '%s'\n", optarg);
 121                                 goto exit;
 122                         }
 123                         udev_ctrl_set_env(uctrl, optarg);
 124                         break;
 125                 case 'm':
 126                 case 'm' + 256:
 127                         i = strtoul(optarg, &endp, 0);
 128                         if (endp[0] != '\0' || i < 1) {
 129                                 fprintf(stderr, "invalid number '%s'\n", optarg);
 130                                 goto exit;
 131                         }
 132                         udev_ctrl_set_max_childs(uctrl, i);
 133                         break;
 134                 case 'M':
 135                 case 'M' + 256:
 136                         i = strtoul(optarg, &endp, 0);
 137                         if (endp[0] != '\0' || i < 1) {
 138                                 fprintf(stderr, "invalid number '%s'\n", optarg);
 139                                 goto exit;
 140                         }
 141                         udev_ctrl_set_max_childs_running(uctrl, i);
 142                         break;
 143                         break;
 144                 case 'h':
 145                         printf("Usage: udevadm control COMMAND\n"
 146                                 "  --log-priority=<level>   set the udev log level for the daemon\n"
 147                                 "  --stop-exec-queue        keep udevd from executing events, queue only\n"
 148                                 "  --start-exec-queue       execute events, flush queue\n"
 149                                 "  --reload-rules           reloads the rules files\n"
 150                                 "  --env=<KEY>=<value>      set a global environment variable\n"
 151                                 "  --max-childs=<N>         maximum number of childs\n"
 152                                 "  --max-childs-running=<N> maximum number of childs running at the same time\n"
 153                                 "  --help                   print this help text\n\n");
 154                         goto exit;
 155                 default:
 156                         goto exit;
 157                 }
 158         }
 159
 160         /* compat stuff which will be removed in a future release */
 161         if (argv[optind] != NULL) {
 162                 const char *arg = argv[optind];
 163
 164                 fprintf(stderr, "udevadm control commands requires the --<command> format, "
 165                         "this will stop working in a future release\n");
 166                 err("udevadm control commands requires the --<command> format, "
 167                     "this will stop working in a future release\n");
 168
 169                 if (!strncmp(arg, "log_priority=", strlen("log_priority="))) {
 170                         udev_ctrl_set_log_level(uctrl, log_priority(&arg[strlen("log_priority=")]));
 171                 } else if (!strcmp(arg, "stop_exec_queue")) {
 172                         udev_ctrl_stop_exec_queue(uctrl);
 173                 } else if (!strcmp(arg, "start_exec_queue")) {
 174                         udev_ctrl_start_exec_queue(uctrl);
 175                 } else if (!strcmp(arg, "reload_rules")) {
 176                         udev_ctrl_reload_rules(uctrl);
 177                 } else if (!strncmp(arg, "max_childs=", strlen("max_childs="))) {
 178                         udev_ctrl_set_max_childs(uctrl, strtoul(&arg[strlen("max_childs=")], NULL, 0));
 179                 } else if (!strncmp(arg, "max_childs_running=", strlen("max_childs_running="))) {
 180                         udev_ctrl_set_max_childs_running(uctrl, strtoul(&arg[strlen("max_childs_running=")], NULL, 0));
 181                 } else if (!strncmp(arg, "env", strlen("env"))) {
 182                         udev_ctrl_set_env(uctrl, &arg[strlen("env=")]);
 183                 } else {
 184                         fprintf(stderr, "unrecognized command '%s'\n", arg);
 185                         err("unrecognized command '%s'\n", arg);
 186                 }
 187         }
 188 exit:
 189         udev_ctrl_unref(uctrl);
 190         logging_close();
 191         return rc;
 192 }