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 int udevadm_control(struct udev *udev, int argc, char *argv[])
  38 {
  39         struct udev_ctrl *uctrl;
  40         int rc = 1;
  41
  42         /* compat values with '_' will be removed in a future release */
  43         static const struct option options[] = {
  44                 { "log-priority", 1, NULL, 'l' },
  45                 { "log_priority", 1, NULL, 'l' + 256 },
  46                 { "stop-exec-queue", 0, NULL, 's' },
  47                 { "stop_exec_queue", 0, NULL, 's' + 256 },
  48                 { "start-exec-queue", 0, NULL, 'S' },
  49                 { "start_exec_queue", 0, NULL, 'S' + 256},
  50                 { "reload-rules", 0, NULL, 'R' },
  51                 { "reload_rules", 0, NULL, 'R' + 256},
  52                 { "env", 1, NULL, 'e' },
  53                 { "max-childs", 1, NULL, 'm' },
  54                 { "max_childs", 1, NULL, 'm' + 256},
  55                 { "max-childs-running", 1, NULL, 'M' },
  56                 { "max_childs_running", 1, NULL, 'M' + 256},
  57                 { "help", 0, NULL, 'h' },
  58                 {}
  59         };
  60
  61         if (getuid() != 0) {
  62                 fprintf(stderr, "root privileges required\n");
  63                 goto exit;
  64         }
  65
  66         uctrl = udev_ctrl_new_from_socket(udev, UDEVD_CTRL_SOCK_PATH);
  67         if (uctrl == NULL)
  68                 goto exit;
  69
  70         while (1) {
  71                 int option;
  72                 int i;
  73                 char *endp;
  74
  75                 option = getopt_long(argc, argv, "l:sSRe:m:M:h", options, NULL);
  76                 if (option == -1)
  77                         break;
  78
  79                 if (option > 255) {
  80                         info(udev, "udevadm control expects commands without underscore, "
  81                             "this will stop working in a future release\n");
  82                         fprintf(stderr, "udevadm control expects commands without underscore, "
  83                                 "this will stop working in a future release\n");
  84                 }
  85
  86                 switch (option) {
  87                 case 'l':
  88                 case 'l' + 256:
  89                         i = log_priority(optarg);
  90                         if (i < 0) {
  91                                 fprintf(stderr, "invalid number '%s'\n", optarg);
  92                                 goto exit;
  93                         }
  94                         udev_ctrl_set_log_level(uctrl, log_priority(optarg));
  95                         break;
  96                 case 's':
  97                 case 's' + 256:
  98                         udev_ctrl_stop_exec_queue(uctrl);
  99                         break;
 100                 case 'S':
 101                 case 'S' + 256:
 102                         udev_ctrl_start_exec_queue(uctrl);
 103                         break;
 104                 case 'R':
 105                 case 'R' + 256:
 106                         udev_ctrl_reload_rules(uctrl);
 107                         break;
 108                 case 'e':
 109                         if (strchr(optarg, '=') == NULL) {
 110                                 fprintf(stderr, "expect <KEY>=<valaue> instead of '%s'\n", optarg);
 111                                 goto exit;
 112                         }
 113                         udev_ctrl_set_env(uctrl, optarg);
 114                         break;
 115                 case 'm':
 116                 case 'm' + 256:
 117                         i = strtoul(optarg, &endp, 0);
 118                         if (endp[0] != '\0' || i < 1) {
 119                                 fprintf(stderr, "invalid number '%s'\n", optarg);
 120                                 goto exit;
 121                         }
 122                         udev_ctrl_set_max_childs(uctrl, i);
 123                         break;
 124                 case 'M':
 125                 case 'M' + 256:
 126                         i = strtoul(optarg, &endp, 0);
 127                         if (endp[0] != '\0' || i < 1) {
 128                                 fprintf(stderr, "invalid number '%s'\n", optarg);
 129                                 goto exit;
 130                         }
 131                         udev_ctrl_set_max_childs_running(uctrl, i);
 132                         break;
 133                 case 'h':
 134                         printf("Usage: udevadm control COMMAND\n"
 135                                 "  --log-priority=<level>   set the udev log level for the daemon\n"
 136                                 "  --stop-exec-queue        keep udevd from executing events, queue only\n"
 137                                 "  --start-exec-queue       execute events, flush queue\n"
 138                                 "  --reload-rules           reloads the rules files\n"
 139                                 "  --env=<KEY>=<value>      set a global environment variable\n"
 140                                 "  --max-childs=<N>         maximum number of childs\n"
 141                                 "  --max-childs-running=<N> maximum number of childs running at the same time\n"
 142                                 "  --help                   print this help text\n\n");
 143                         goto exit;
 144                 default:
 145                         goto exit;
 146                 }
 147         }
 148
 149         /* compat stuff which will be removed in a future release */
 150         if (argv[optind] != NULL) {
 151                 const char *arg = argv[optind];
 152
 153                 fprintf(stderr, "udevadm control commands requires the --<command> format, "
 154                         "this will stop working in a future release\n");
 155                 err(udev, "udevadm control commands requires the --<command> format, "
 156                     "this will stop working in a future release\n");
 157
 158                 if (!strncmp(arg, "log_priority=", strlen("log_priority="))) {
 159                         udev_ctrl_set_log_level(uctrl, log_priority(&arg[strlen("log_priority=")]));
 160                 } else if (!strcmp(arg, "stop_exec_queue")) {
 161                         udev_ctrl_stop_exec_queue(uctrl);
 162                 } else if (!strcmp(arg, "start_exec_queue")) {
 163                         udev_ctrl_start_exec_queue(uctrl);
 164                 } else if (!strcmp(arg, "reload_rules")) {
 165                         udev_ctrl_reload_rules(uctrl);
 166                 } else if (!strncmp(arg, "max_childs=", strlen("max_childs="))) {
 167                         udev_ctrl_set_max_childs(uctrl, strtoul(&arg[strlen("max_childs=")], NULL, 0));
 168                 } else if (!strncmp(arg, "max_childs_running=", strlen("max_childs_running="))) {
 169                         udev_ctrl_set_max_childs_running(uctrl, strtoul(&arg[strlen("max_childs_running=")], NULL, 0));
 170                 } else if (!strncmp(arg, "env", strlen("env"))) {
 171                         udev_ctrl_set_env(uctrl, &arg[strlen("env=")]);
 172                 } else {
 173                         fprintf(stderr, "unrecognized command '%s'\n", arg);
 174                         err(udev, "unrecognized command '%s'\n", arg);
 175                 }
 176         }
 177 exit:
 178         udev_ctrl_unref(uctrl);
 179         return rc;
 180 }