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
  27 public static int job_info_compare(void* key1, void* key2) {
  28         Manager.JobInfo *j1 = (Manager.JobInfo*) key1;
  29         Manager.JobInfo *j2 = (Manager.JobInfo*) key2;
  30
  31         return j1->id < j2->id ? -1 : (j1->id > j2->id ? 1 : 0);
  32 }
  33
  34 public static int unit_info_compare(void* key1, void* key2) {
  35         Manager.UnitInfo *u1 = (Manager.UnitInfo*) key1;
  36         Manager.UnitInfo *u2 = (Manager.UnitInfo*) key2;
  37
  38         int r = Posix.strcmp(Posix.strrchr(u1->id, '.'), Posix.strrchr(u2->id, '.'));
  39         if (r != 0)
  40                 return r;
  41
  42         return Posix.strcmp(u1->id, u2->id);
  43 }
  44
  45 public void on_unit_new(string id, ObjectPath path) {
  46         stdout.printf("Unit %s added.\n", id);
  47 }
  48
  49 public void on_job_new(uint32 id, ObjectPath path) {
  50         stdout.printf("Job %u added.\n", id);
  51 }
  52
  53 public void on_unit_removed(string id, ObjectPath path) {
  54         stdout.printf("Unit %s removed.\n", id);
  55 }
  56
  57 public void on_job_removed(uint32 id, ObjectPath path) {
  58         stdout.printf("Job %u removed.\n", id);
  59 }
  60
  61 static const OptionEntry entries[] = {
  62         { "type",    't', 0, OptionArg.STRING, out type,    "List only particular type of units", "TYPE" },
  63         { "all",     'a', 0, OptionArg.NONE,   out all,     "Show all units, including dead ones", null  },
  64         { "replace", 0,   0, OptionArg.NONE,   out replace, "When installing a new job, replace existing conflicting ones.", null },
  65         { null }
  66 };
  67
  68 int main (string[] args) {
  69
  70         OptionContext context = new OptionContext(" [COMMAND [ARGUMENT...]]");
  71         context.add_main_entries(entries, null);
  72         context.set_description(
  73                         "Commands:\n" +
  74                         "  list-units          List units\n" +
  75                         "  list-jobs           List jobs\n" +
  76                         "  clear-jobs          Cancel all jobs\n" +
  77                         "  load [NAME...]      Load one or more units\n" +
  78                         "  cancel [JOB...]     Cancel one or more jobs\n" +
  79                         "  start [NAME...]     Start on or more units\n" +
  80                         "  stop [NAME...]      Stop on or more units\n" +
  81                         "  restart [NAME...]   Restart on or more units\n" +
  82                         "  reload [NAME...]    Reload on or more units\n" +
  83                         "  monitor             Monitor unit/job changes\n");
  84
  85         try {
  86                 context.parse(ref args);
  87         } catch (GLib.OptionError e) {
  88                 message("Failed to parse command line: %s".printf(e.message));
  89         }
  90
  91         try {
  92                 Connection bus = Bus.get(BusType.SESSION);
  93
  94                 Manager manager = bus.get_object (
  95                                 "org.freedesktop.systemd1",
  96                                 "/org/freedesktop/systemd1",
  97                                 "org.freedesktop.systemd1") as Manager;
  98
  99                 if (args[1] == "list-units" || args.length <= 1) {
 100                         var list = manager.list_units();
 101                         uint n = 0;
 102                         Posix.qsort(list, list.length, sizeof(Manager.UnitInfo), unit_info_compare);
 103
 104                         stdout.printf("%-45s %-6s %-12s %-17s\n", "UNIT", "LOAD", "ACTIVE", "JOB");
 105
 106                         foreach (var i in list) {
 107
 108                                 if (type != null && !i.id.has_suffix(".%s".printf(type)))
 109                                         continue;
 110
 111                                 if (!all && i.active_state == "inactive")
 112                                         continue;
 113
 114                                 stdout.printf("%-45s %-6s %-12s", i.id, i.load_state, i.active_state);
 115
 116                                 if (i.job_id != 0)
 117                                         stdout.printf("→ %-15s", i.job_type);
 118
 119                                 stdout.puts("\n");
 120                                 n++;
 121                         }
 122
 123                         if (all)
 124                                 stdout.printf("\n%u units listed.\n", n);
 125                         else
 126                                 stdout.printf("\n%u live units listed. Pass --all to see dead units, too.\n", n);
 127
 128
 129                 } else if (args[1] == "list-jobs") {
 130                         var list = manager.list_jobs();
 131                         Posix.qsort(list, list.length, sizeof(Manager.JobInfo), job_info_compare);
 132
 133                         stdout.printf("%4s %-45s %-17s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
 134
 135                         foreach (var i in list)
 136                                 stdout.printf("%4u %-45s → %-15s %-7s\n", i.id, i.name, i.type, i.state);
 137
 138                         stdout.printf("\n%u jobs listed.\n", list.length);
 139
 140                 } else if (args[1] == "clear-jobs") {
 141
 142                         manager.clear_jobs();
 143
 144                 } else if (args[1] == "load") {
 145
 146                         if (args.length < 3) {
 147                                 stderr.printf("Missing argument.\n");
 148                                 return 1;
 149                         }
 150
 151                         for (int i = 2; i < args.length; i++)
 152                                 manager.load_unit(args[i]);
 153
 154                 } else if (args[1] == "cancel") {
 155
 156                         if (args.length < 3) {
 157                                 stderr.printf("Missing argument.\n");
 158                                 return 1;
 159                         }
 160
 161                         for (int i = 2; i < args.length; i++) {
 162                                 uint32 id;
 163
 164                                 if (args[i].scanf("%u", out id) != 1) {
 165                                         stderr.printf("Failed to parse argument.\n");
 166                                         return 1;
 167                                 }
 168
 169                                 ObjectPath p = manager.get_job(id);
 170
 171                                 Job j = bus.get_object (
 172                                                 "org.freedesktop.systemd1",
 173                                                 p,
 174                                                 "org.freedesktop.systemd1.Job") as Job;
 175
 176                                 j.cancel();
 177                         }
 178
 179                 } else if (args[1] == "start" ||
 180                            args[1] == "stop" ||
 181                            args[1] == "reload" ||
 182                            args[1] == "restart") {
 183
 184                         if (args.length < 3) {
 185                                 stderr.printf("Missing argument.\n");
 186                                 return 1;
 187                         }
 188
 189                         for (int i = 2; i < args.length; i++) {
 190
 191                                 ObjectPath p = manager.get_unit(args[i]);
 192
 193                                 Unit u = bus.get_object(
 194                                                 "org.freedesktop.systemd1",
 195                                                 p,
 196                                                 "org.freedesktop.systemd1.Unit") as Unit;
 197
 198                                 string mode = replace ? "replace" : "fail";
 199
 200                                 if (args[1] == "start")
 201                                         u.start(mode);
 202                                 else if (args[1] == "stop")
 203                                         u.stop(mode);
 204                                 else if (args[1] == "restart")
 205                                         u.restart(mode);
 206                                 else if (args[1] == "reload")
 207                                         u.reload(mode);
 208                         }
 209
 210                 } else if (args[1] == "monitor") {
 211
 212                         manager.subscribe();
 213
 214                         manager.unit_new += on_unit_new;
 215                         manager.unit_removed += on_unit_removed;
 216                         manager.job_new += on_job_new;
 217                         manager.job_removed += on_job_removed;
 218
 219                         MainLoop l = new MainLoop();
 220                         l.run();
 221
 222                 } else {
 223                         stderr.printf("Unknown command %s.\n", args[1]);
 224                         return 1;
 225                 }
 226
 227         } catch (DBus.Error e) {
 228                 stderr.printf("%s\n".printf(e.message));
 229         }
 230
 231         return 0;
 232 }