systemctl.vala

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2010 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by
   8   the Free Software Foundation; either version 2 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 using DBus;
  21 using GLib;
  22
  23 static string type = null;
  24 static bool all = false;
  25 static bool replace = false;
  26 static bool session = false;
  27
  28 public static int job_info_compare(void* key1, void* key2) {
  29         Manager.JobInfo *j1 = (Manager.JobInfo*) key1;
  30         Manager.JobInfo *j2 = (Manager.JobInfo*) key2;
  31
  32         return j1->id < j2->id ? -1 : (j1->id > j2->id ? 1 : 0);
  33 }
  34
  35 public static int unit_info_compare(void* key1, void* key2) {
  36         Manager.UnitInfo *u1 = (Manager.UnitInfo*) key1;
  37         Manager.UnitInfo *u2 = (Manager.UnitInfo*) key2;
  38
  39         int r = Posix.strcmp(Posix.strrchr(u1->id, '.'), Posix.strrchr(u2->id, '.'));
  40         if (r != 0)
  41                 return r;
  42
  43         return Posix.strcmp(u1->id, u2->id);
  44 }
  45
  46 public void on_unit_new(string id, ObjectPath path) {
  47         stdout.printf("Unit %s added.\n", id);
  48 }
  49
  50 public void on_job_new(uint32 id, ObjectPath path) {
  51         stdout.printf("Job %u added.\n", id);
  52 }
  53
  54 public void on_unit_removed(string id, ObjectPath path) {
  55         stdout.printf("Unit %s removed.\n", id);
  56 }
  57
  58 public void on_job_removed(uint32 id, ObjectPath path) {
  59         stdout.printf("Job %u removed.\n", id);
  60 }
  61
  62 static const OptionEntry entries[] = {
  63         { "type",    't', 0,                   OptionArg.STRING, out type,    "List only particular type of units", "TYPE" },
  64         { "all",     'a', 0,                   OptionArg.NONE,   out all,     "Show all units, including dead ones", null  },
  65         { "replace", 0,   0,                   OptionArg.NONE,   out replace, "When installing a new job, replace existing conflicting ones", null },
  66         { "session", 0,   0,                   OptionArg.NONE,   out session, "Connect to session bus", null },
  67         { "system",  0,   OptionFlags.REVERSE, OptionArg.NONE,   out session, "Connect to system bus", null },
  68         { null }
  69 };
  70
  71 int main (string[] args) {
  72
  73         OptionContext context = new OptionContext("[COMMAND [ARGUMENT...]]");
  74         context.add_main_entries(entries, null);
  75         context.set_description(
  76                         "Commands:\n" +
  77                         "  list-units                      List units\n" +
  78                         "  list-jobs                       List jobs\n" +
  79                         "  clear-jobs                      Cancel all jobs\n" +
  80                         "  load [NAME...]                  Load one or more units\n" +
  81                         "  cancel [JOB...]                 Cancel one or more jobs\n" +
  82                         "  start [NAME...]                 Start on or more units\n" +
  83                         "  stop [NAME...]                  Stop on or more units\n" +
  84                         "  enter [NAME]                    Start one unit and stop all others\n" +
  85                         "  restart [NAME...]               Restart on or more units\n" +
  86                         "  reload [NAME...]                Reload on or more units\n" +
  87                         "  monitor                         Monitor unit/job changes\n" +
  88                         "  dump                            Dump server status\n" +
  89                         "  snapshot [NAME]                 Create a snapshot\n" +
  90                         "  daemon-reload                   Reload daemon configuration\n" +
  91                         "  daemon-reexecute                Reexecute daemon\n" +
  92                         "  show-environment                Dump environment\n" +
  93                         "  set-environment [NAME=VALUE...] Set one or more environment variables\n" +
  94                         "  unset-environment [NAME...]     Unset one or more environment variables\n");
  95
  96         try {
  97                 context.parse(ref args);
  98         } catch (GLib.OptionError e) {
  99                 message("Failed to parse command line: %s".printf(e.message));
 100         }
 101
 102         try {
 103                 Connection bus = Bus.get(session ? BusType.SESSION : BusType.SYSTEM);
 104
 105                 Manager manager = bus.get_object (
 106                                 "org.freedesktop.systemd1",
 107                                 "/org/freedesktop/systemd1",
 108                                 "org.freedesktop.systemd1.Manager") as Manager;
 109
 110                 if (args[1] == "list-units" || args.length <= 1) {
 111                         var list = manager.list_units();
 112                         uint n = 0;
 113                         Posix.qsort(list, list.length, sizeof(Manager.UnitInfo), unit_info_compare);
 114
 115                         stdout.printf("%-45s %-6s %-12s %-12s %-17s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB");
 116
 117                         foreach (var i in list) {
 118
 119                                 if (type != null && !i.id.has_suffix(".%s".printf(type)))
 120                                         continue;
 121
 122                                 if (!all && i.active_state == "inactive")
 123                                         continue;
 124
 125                                 stdout.printf("%-45s %-6s %-12s %-12s", i.id, i.load_state, i.active_state, i.sub_state);
 126
 127                                 if (i.job_id != 0)
 128                                         stdout.printf(" -> %-15s", i.job_type);
 129
 130                                 stdout.puts("\n");
 131                                 n++;
 132                         }
 133
 134                         if (all)
 135                                 stdout.printf("\n%u units listed.\n", n);
 136                         else
 137                                 stdout.printf("\n%u live units listed. Pass --all to see dead units, too.\n", n);
 138
 139
 140                 } else if (args[1] == "list-jobs") {
 141                         var list = manager.list_jobs();
 142                         Posix.qsort(list, list.length, sizeof(Manager.JobInfo), job_info_compare);
 143
 144                         stdout.printf("%4s %-45s %-17s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
 145
 146                         foreach (var i in list)
 147                                 stdout.printf("%4u %-45s → %-15s %-7s\n", i.id, i.name, i.type, i.state);
 148
 149                         stdout.printf("\n%u jobs listed.\n", list.length);
 150
 151                 } else if (args[1] == "clear-jobs") {
 152
 153                         manager.clear_jobs();
 154
 155                 } else if (args[1] == "load") {
 156
 157                         if (args.length < 3) {
 158                                 stderr.printf("Missing argument.\n");
 159                                 return 1;
 160                         }
 161
 162                         for (int i = 2; i < args.length; i++)
 163                                 manager.load_unit(args[i]);
 164
 165                 } else if (args[1] == "cancel") {
 166
 167                         if (args.length < 3) {
 168                                 stderr.printf("Missing argument.\n");
 169                                 return 1;
 170                         }
 171
 172                         for (int i = 2; i < args.length; i++) {
 173                                 uint32 id;
 174
 175                                 if (args[i].scanf("%u", out id) != 1) {
 176                                         stderr.printf("Failed to parse argument.\n");
 177                                         return 1;
 178                                 }
 179
 180                                 ObjectPath p = manager.get_job(id);
 181
 182                                 Job j = bus.get_object (
 183                                                 "org.freedesktop.systemd1",
 184                                                 p,
 185                                                 "org.freedesktop.systemd1.Job") as Job;
 186
 187                                 j.cancel();
 188                         }
 189
 190                 } else if (args[1] == "start" ||
 191                            args[1] == "stop" ||
 192                            args[1] == "reload" ||
 193                            args[1] == "restart") {
 194
 195                         if (args.length < 3) {
 196                                 stderr.printf("Missing argument.\n");
 197                                 return 1;
 198                         }
 199
 200                         for (int i = 2; i < args.length; i++) {
 201
 202                                 ObjectPath p = manager.load_unit(args[i]);
 203
 204                                 Unit u = bus.get_object(
 205                                                 "org.freedesktop.systemd1",
 206                                                 p,
 207                                                 "org.freedesktop.systemd1.Unit") as Unit;
 208
 209                                 string mode = replace ? "replace" : "fail";
 210
 211                                 if (args[1] == "start")
 212                                         u.start(mode);
 213                                 else if (args[1] == "stop")
 214                                         u.stop(mode);
 215                                 else if (args[1] == "restart")
 216                                         u.restart(mode);
 217                                 else if (args[1] == "reload")
 218                                         u.reload(mode);
 219                         }
 220
 221                 } else if (args[1] == "isolate") {
 222
 223                         if (args.length != 3) {
 224                                 stderr.printf("Missing argument.\n");
 225                                 return 1;
 226                         }
 227
 228                         ObjectPath p = manager.load_unit(args[2]);
 229
 230                         Unit u = bus.get_object(
 231                                         "org.freedesktop.systemd1",
 232                                         p,
 233                                         "org.freedesktop.systemd1.Unit") as Unit;
 234
 235                         u.start("isolate");
 236
 237                 } else if (args[1] == "monitor") {
 238
 239                         manager.subscribe();
 240
 241                         manager.unit_new += on_unit_new;
 242                         manager.unit_removed += on_unit_removed;
 243                         manager.job_new += on_job_new;
 244                         manager.job_removed += on_job_removed;
 245
 246                         MainLoop l = new MainLoop();
 247                         l.run();
 248
 249                 } else if (args[1] == "dump")
 250                         stdout.puts(manager.dump());
 251
 252                 else if (args[1] == "snapshot") {
 253
 254                         ObjectPath p = manager.create_snapshot(args.length > 2 ? args[2] : "");
 255
 256                         Unit u = bus.get_object(
 257                                         "org.freedesktop.systemd1",
 258                                         p,
 259                                         "org.freedesktop.systemd1.Unit") as Unit;
 260
 261                         stdout.printf("%s\n", u.id);
 262
 263                 } else if (args[1] == "daemon-reload")
 264                         manager.reload();
 265
 266                 else if (args[1] == "daemon-reexecute" || args[1] == "daemon-reexec")
 267                         manager.reexecute();
 268
 269                 else if (args[1] == "daemon-exit")
 270                         manager.exit();
 271
 272                 else if (args[1] == "show-environment") {
 273                         foreach(var x in manager.environment)
 274                                 stderr.printf("%s\n", x);
 275
 276                 } else if (args[1] == "set-environment")
 277                         manager.set_environment(args[2:args.length]);
 278
 279                 else if (args[1] == "unset-environment")
 280                         manager.unset_environment(args[2:args.length]);
 281
 282                 else {
 283                         stderr.printf("Unknown command %s.\n", args[1]);
 284                         return 1;
 285                 }
 286
 287         } catch (DBus.Error e) {
 288                 stderr.printf("%s\n".printf(e.message));
 289         }
 290
 291         return 0;
 292 }