systemctl.vala

   1 using DBus;
   2 using GLib;
   3
   4 [DBus (name = "org.freedesktop.systemd1")]
   5 public interface Manager : DBus.Object {
   6
   7         public struct UnitInfo {
   8                 string id;
   9                 string description;
  10                 string load_state;
  11                 string active_state;
  12                 ObjectPath unit_path;
  13                 uint32 job_id;
  14                 string job_type;
  15                 ObjectPath job_path;
  16         }
  17
  18         public struct JobInfo {
  19                 uint32 id;
  20                 string name;
  21                 string type;
  22                 string state;
  23                 ObjectPath job_path;
  24                 ObjectPath unit_path;
  25         }
  26
  27         public abstract UnitInfo[] ListUnits() throws DBus.Error;
  28         public abstract JobInfo[] ListJobs() throws DBus.Error;
  29
  30         public abstract ObjectPath LoadUnit(string name) throws DBus.Error;
  31 }
  32
  33 static string type = null;
  34 static bool all = false;
  35
  36 public static int job_info_compare(void* key1, void* key2) {
  37         Manager.JobInfo *j1 = (Manager.JobInfo*) key1;
  38         Manager.JobInfo *j2 = (Manager.JobInfo*) key2;
  39
  40         return Posix.strcmp(j1->name, j2->name);
  41 }
  42
  43 public static int unit_info_compare(void* key1, void* key2) {
  44         Manager.UnitInfo *u1 = (Manager.UnitInfo*) key1;
  45         Manager.UnitInfo *u2 = (Manager.UnitInfo*) key2;
  46
  47         int r = Posix.strcmp(Posix.strrchr(u1->id, '.'), Posix.strrchr(u2->id, '.'));
  48         if (r != 0)
  49                 return r;
  50
  51         return Posix.strcmp(u1->id, u2->id);
  52 }
  53
  54 static const OptionEntry entries[] = {
  55         { "type", 't', 0, OptionArg.STRING, out type, "List only particular type of units", "TYPE" },
  56         { "all",  'a', 0, OptionArg.NONE,   out all,  "Show all units, including dead ones", null  },
  57         { null }
  58 };
  59
  60 int main (string[] args) {
  61
  62         OptionContext context = new OptionContext(" -- Control systemd");
  63         context.add_main_entries(entries, null);
  64
  65         try {
  66                 context.parse(ref args);
  67         } catch (GLib.OptionError e) {
  68                 message("Failed to parse command line: %s".printf(e.message));
  69         }
  70
  71         try {
  72                 Connection bus = Bus.get(BusType.SESSION);
  73
  74                 Manager manager = bus.get_object (
  75                                 "org.freedesktop.systemd1",
  76                                 "/org/freedesktop/systemd1",
  77                                 "org.freedesktop.systemd1") as Manager;
  78
  79                 if (args[1] == "list-units" || args.length <= 1) {
  80                         var list = manager.ListUnits();
  81                         uint n = 0;
  82                         Posix.qsort(list, list.length, sizeof(Manager.UnitInfo), unit_info_compare);
  83
  84                         stdout.printf("%-45s %-6s %-12s → %-15s\n\n", "UNIT", "LOAD", "ACTIVE", "JOB");
  85
  86                         foreach (var i in list) {
  87
  88                                 if (type != null && !i.id.has_suffix(".%s".printf(type)))
  89                                         continue;
  90
  91                                 if (!all && i.active_state == "inactive")
  92                                         continue;
  93
  94                                 stdout.printf("%-45s %-6s %-12s", i.id, i.load_state, i.active_state);
  95
  96                                 if (i.job_id != 0)
  97                                         stdout.printf("→ %-15s", i.job_type);
  98
  99                                 stdout.puts("\n");
 100                                 n++;
 101                         }
 102
 103                         if (all)
 104                                 stdout.printf("\n%u units listed.\n", n);
 105                         else
 106                                 stdout.printf("\n%u live units listed. Pass --all to see dead units, too.\n", n);
 107
 108
 109                 } else if (args[1] == "list-jobs") {
 110                         var list = manager.ListJobs();
 111                         Posix.qsort(list, list.length, sizeof(Manager.JobInfo), job_info_compare);
 112
 113                         foreach (var i in list)
 114                                 stdout.printf("%-45s → %-15s %-7s\n", i.name, i.type, i.state);
 115
 116                 } else if (args[1] == "load") {
 117
 118                         if (args.length < 3) {
 119                                 stderr.printf("Missing argument.\n");
 120                                 return 1;
 121                         }
 122
 123                         manager.LoadUnit(args[2]);
 124                 } else {
 125                         stderr.printf("Unknown command %s.\n", args[1]);
 126                         return 1;
 127                 }
 128
 129         } catch (DBus.Error e) {
 130                 stderr.printf("%s\n".printf(e.message));
 131         }
 132
 133         return 0;
 134 }