src/dbus-timer.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23
  24 #include "dbus-unit.h"
  25 #include "dbus-timer.h"
  26 #include "dbus-execute.h"
  27
  28 #define BUS_TIMER_INTERFACE                                             \
  29         " <interface name=\"org.freedesktop.systemd1.Timer\">\n"        \
  30         "  <property name=\"Unit\" type=\"s\" access=\"read\"/>\n"      \
  31         "  <property name=\"Timers\" type=\"a(stt)\" access=\"read\"/>\n" \
  32         "  <property name=\"NextElapseUSec\" type=\"t\" access=\"read\"/>\n" \
  33         " </interface>\n"
  34
  35 #define INTROSPECTION                                                   \
  36         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  37         "<node>\n"                                                      \
  38         BUS_UNIT_INTERFACE                                              \
  39         BUS_TIMER_INTERFACE                                             \
  40         BUS_PROPERTIES_INTERFACE                                        \
  41         BUS_PEER_INTERFACE                                              \
  42         BUS_INTROSPECTABLE_INTERFACE                                    \
  43         "</node>\n"
  44
  45 const char bus_timer_interface[] _introspect_("Timer") = BUS_TIMER_INTERFACE;
  46
  47 const char bus_timer_invalidating_properties[] =
  48         "Timers\0"
  49         "NextElapseUSec\0";
  50
  51 static int bus_timer_append_timers(Manager *m, DBusMessageIter *i, const char *property, void *data) {
  52         Timer *p = data;
  53         DBusMessageIter sub, sub2;
  54         TimerValue *k;
  55
  56         assert(m);
  57         assert(i);
  58         assert(property);
  59         assert(p);
  60
  61         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(stt)", &sub))
  62                 return -ENOMEM;
  63
  64         LIST_FOREACH(value, k, p->values) {
  65                 char *buf;
  66                 const char *t;
  67                 size_t l;
  68                 bool b;
  69
  70                 t = timer_base_to_string(k->base);
  71                 assert(endswith(t, "Sec"));
  72
  73                 /* s/Sec/USec/ */
  74                 l = strlen(t);
  75                 if (!(buf = new(char, l+2)))
  76                         return -ENOMEM;
  77
  78                 memcpy(buf, t, l-3);
  79                 memcpy(buf+l-3, "USec", 5);
  80
  81                 b = dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) &&
  82                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &buf) &&
  83                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->value) &&
  84                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->next_elapse) &&
  85                         dbus_message_iter_close_container(&sub, &sub2);
  86
  87                 free(buf);
  88                 if (!b)
  89                         return -ENOMEM;
  90         }
  91
  92         if (!dbus_message_iter_close_container(i, &sub))
  93                 return -ENOMEM;
  94
  95         return 0;
  96 }
  97
  98 static int bus_timer_append_unit(Manager *m, DBusMessageIter *i, const char *property, void *data) {
  99         Unit *u = data;
 100         const char *t;
 101
 102         assert(m);
 103         assert(i);
 104         assert(property);
 105         assert(u);
 106
 107         t = u->timer.unit ? u->timer.unit->meta.id : "";
 108
 109         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
 110 }
 111
 112 DBusHandlerResult bus_timer_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 113         const BusProperty properties[] = {
 114                 BUS_UNIT_PROPERTIES,
 115                 { "org.freedesktop.systemd1.Timer", "Unit",           bus_timer_append_unit,      "s",      u                      },
 116                 { "org.freedesktop.systemd1.Timer", "Timers",         bus_timer_append_timers,    "a(stt)", u                      },
 117                 { "org.freedesktop.systemd1.Timer", "NextElapseUSec", bus_property_append_usec,   "t",      &u->timer.next_elapse  },
 118                 { NULL, NULL, NULL, NULL, NULL }
 119         };
 120
 121         return bus_default_message_handler(u->meta.manager, c, message, INTROSPECTION, properties);
 122 }