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("[OPTION...] [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                         "  restart [NAME...]   Restart on or more units\n" +
  85                         "  reload [NAME...]    Reload on or more units\n" +
  86                         "  monitor             Monitor unit/job changes\n" +
  87                         "  dump                Dump servier status\n" +
  88                         "  snapshot [NAME]     Create a snapshot\n");
  89
  90         try {
  91                 context.parse(ref args);
  92         } catch (GLib.OptionError e) {
  93                 message("Failed to parse command line: %s".printf(e.message));
  94         }
  95
  96         try {
  97                 Connection bus = Bus.get(session ? BusType.SESSION : BusType.SYSTEM);
  98
  99                 Manager manager = bus.get_object (
 100                                 "org.freedesktop.systemd1",
 101                                 "/org/freedesktop/systemd1",
 102                                 "org.freedesktop.systemd1") as Manager;
 103
 104                 if (args[1] == "list-units" || args.length <= 1) {
 105                         var list = manager.list_units();
 106                         uint n = 0;
 107                         Posix.qsort(list, list.length, sizeof(Manager.UnitInfo), unit_info_compare);
 108
 109                         stdout.printf("%-45s %-6s %-12s %-12s %-17s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB");
 110
 111                         foreach (var i in list) {
 112
 113                                 if (type != null && !i.id.has_suffix(".%s".printf(type)))
 114                                         continue;
 115
 116                                 if (!all && i.active_state == "inactive")
 117                                         continue;
 118
 119                                 stdout.printf("%-45s %-6s %-12s %-12s", i.id, i.load_state, i.active_state, i.sub_state);
 120
 121                                 if (i.job_id != 0)
 122                                         stdout.printf(" → %-15s", i.job_type);
 123
 124                                 stdout.puts("\n");
 125                                 n++;
 126                         }
 127
 128                         if (all)
 129                                 stdout.printf("\n%u units listed.\n", n);
 130                         else
 131                                 stdout.printf("\n%u live units listed. Pass --all to see dead units, too.\n", n);
 132
 133
 134                 } else if (args[1] == "list-jobs") {
 135                         var list = manager.list_jobs();
 136                         Posix.qsort(list, list.length, sizeof(Manager.JobInfo), job_info_compare);
 137
 138                         stdout.printf("%4s %-45s %-17s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
 139
 140                         foreach (var i in list)
 141                                 stdout.printf("%4u %-45s → %-15s %-7s\n", i.id, i.name, i.type, i.state);
 142
 143                         stdout.printf("\n%u jobs listed.\n", list.length);
 144
 145                 } else if (args[1] == "clear-jobs") {
 146
 147                         manager.clear_jobs();
 148
 149                 } else if (args[1] == "load") {
 150
 151                         if (args.length < 3) {
 152                                 stderr.printf("Missing argument.\n");
 153                                 return 1;
 154                         }
 155
 156                         for (int i = 2; i < args.length; i++)
 157                                 manager.load_unit(args[i]);
 158
 159                 } else if (args[1] == "cancel") {
 160
 161                         if (args.length < 3) {
 162                                 stderr.printf("Missing argument.\n");
 163                                 return 1;
 164                         }
 165
 166                         for (int i = 2; i < args.length; i++) {
 167                                 uint32 id;
 168
 169                                 if (args[i].scanf("%u", out id) != 1) {
 170                                         stderr.printf("Failed to parse argument.\n");
 171                                         return 1;
 172                                 }
 173
 174                                 ObjectPath p = manager.get_job(id);
 175
 176                                 Job j = bus.get_object (
 177                                                 "org.freedesktop.systemd1",
 178                                                 p,
 179                                                 "org.freedesktop.systemd1.Job") as Job;
 180
 181                                 j.cancel();
 182                         }
 183
 184                 } else if (args[1] == "start" ||
 185                            args[1] == "stop" ||
 186                            args[1] == "reload" ||
 187                            args[1] == "restart") {
 188
 189                         if (args.length < 3) {
 190                                 stderr.printf("Missing argument.\n");
 191                                 return 1;
 192                         }
 193
 194                         for (int i = 2; i < args.length; i++) {
 195
 196                                 ObjectPath p = manager.get_unit(args[i]);
 197
 198                                 Unit u = bus.get_object(
 199                                                 "org.freedesktop.systemd1",
 200                                                 p,
 201                                                 "org.freedesktop.systemd1.Unit") as Unit;
 202
 203                                 string mode = replace ? "replace" : "fail";
 204
 205                                 if (args[1] == "start")
 206                                         u.start(mode);
 207                                 else if (args[1] == "stop")
 208                                         u.stop(mode);
 209                                 else if (args[1] == "restart")
 210                                         u.restart(mode);
 211                                 else if (args[1] == "reload")
 212                                         u.reload(mode);
 213                         }
 214
 215                 } else if (args[1] == "monitor") {
 216
 217                         manager.subscribe();
 218
 219                         manager.unit_new += on_unit_new;
 220                         manager.unit_removed += on_unit_removed;
 221                         manager.job_new += on_job_new;
 222                         manager.job_removed += on_job_removed;
 223
 224                         MainLoop l = new MainLoop();
 225                         l.run();
 226
 227                 } else if (args[1] == "dump")
 228                         stdout.puts(manager.dump());
 229                 else if (args[1] == "snapshot") {
 230
 231                         ObjectPath p = manager.create_snapshot(args.length > 2 ? args[2] : "");
 232
 233                         Unit u = bus.get_object(
 234                                         "org.freedesktop.systemd1",
 235                                         p,
 236                                         "org.freedesktop.systemd1.Unit") as Unit;
 237
 238                         stdout.printf("%s\n", u.id);
 239                 } else {
 240                         stderr.printf("Unknown command %s.\n", args[1]);
 241                         return 1;
 242                 }
 243
 244         } catch (DBus.Error e) {
 245                 stderr.printf("%s\n".printf(e.message));
 246         }
 247
 248         return 0;
 249 }