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         public abstract void ClearJobs() throws DBus.Error;
  33 }
  34
  35 static string type = null;
  36 static bool all = false;
  37
  38 public static int job_info_compare(void* key1, void* key2) {
  39         Manager.JobInfo *j1 = (Manager.JobInfo*) key1;
  40         Manager.JobInfo *j2 = (Manager.JobInfo*) key2;
  41
  42         return Posix.strcmp(j1->name, j2->name);
  43 }
  44
  45 public static int unit_info_compare(void* key1, void* key2) {
  46         Manager.UnitInfo *u1 = (Manager.UnitInfo*) key1;
  47         Manager.UnitInfo *u2 = (Manager.UnitInfo*) key2;
  48
  49         int r = Posix.strcmp(Posix.strrchr(u1->id, '.'), Posix.strrchr(u2->id, '.'));
  50         if (r != 0)
  51                 return r;
  52
  53         return Posix.strcmp(u1->id, u2->id);
  54 }
  55
  56 static const OptionEntry entries[] = {
  57         { "type", 't', 0, OptionArg.STRING, out type, "List only particular type of units", "TYPE" },
  58         { "all",  'a', 0, OptionArg.NONE,   out all,  "Show all units, including dead ones", null  },
  59         { null }
  60 };
  61
  62 int main (string[] args) {
  63
  64         OptionContext context = new OptionContext(" -- Control systemd");
  65         context.add_main_entries(entries, null);
  66
  67         try {
  68                 context.parse(ref args);
  69         } catch (GLib.OptionError e) {
  70                 message("Failed to parse command line: %s".printf(e.message));
  71         }
  72
  73         try {
  74                 Connection bus = Bus.get(BusType.SESSION);
  75
  76                 Manager manager = bus.get_object (
  77                                 "org.freedesktop.systemd1",
  78                                 "/org/freedesktop/systemd1",
  79                                 "org.freedesktop.systemd1") as Manager;
  80
  81                 if (args[1] == "list-units" || args.length <= 1) {
  82                         var list = manager.ListUnits();
  83                         uint n = 0;
  84                         Posix.qsort(list, list.length, sizeof(Manager.UnitInfo), unit_info_compare);
  85
  86                         stdout.printf("%-45s %-6s %-12s %-17s\n", "UNIT", "LOAD", "ACTIVE", "JOB");
  87
  88                         foreach (var i in list) {
  89
  90                                 if (type != null && !i.id.has_suffix(".%s".printf(type)))
  91                                         continue;
  92
  93                                 if (!all && i.active_state == "inactive")
  94                                         continue;
  95
  96                                 stdout.printf("%-45s %-6s %-12s", i.id, i.load_state, i.active_state);
  97
  98                                 if (i.job_id != 0)
  99                                         stdout.printf("→ %-15s", i.job_type);
 100
 101                                 stdout.puts("\n");
 102                                 n++;
 103                         }
 104
 105                         if (all)
 106                                 stdout.printf("\n%u units listed.\n", n);
 107                         else
 108                                 stdout.printf("\n%u live units listed. Pass --all to see dead units, too.\n", n);
 109
 110
 111                 } else if (args[1] == "list-jobs") {
 112                         var list = manager.ListJobs();
 113                         Posix.qsort(list, list.length, sizeof(Manager.JobInfo), job_info_compare);
 114
 115                         stdout.printf("%-45s %-17s %-7s\n", "UNIT", "TYPE", "STATE");
 116
 117                         foreach (var i in list)
 118                                 stdout.printf("%-45s → %-15s %-7s\n", i.name, i.type, i.state);
 119
 120                         stdout.printf("\n%u jobs listed.\n", list.length);
 121
 122                 } else if (args[1] == "clear-jobs") {
 123
 124                         manager.ClearJobs();
 125
 126                 } else if (args[1] == "load") {
 127
 128                         if (args.length < 3) {
 129                                 stderr.printf("Missing argument.\n");
 130                                 return 1;
 131                         }
 132
 133                         manager.LoadUnit(args[2]);
 134                 } else {
 135                         stderr.printf("Unknown command %s.\n", args[1]);
 136                         return 1;
 137                 }
 138
 139         } catch (DBus.Error e) {
 140                 stderr.printf("%s\n".printf(e.message));
 141         }
 142
 143         return 0;
 144 }