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 #include "dbus-common.h"
  28
  29 #define BUS_TIMER_INTERFACE                                             \
  30         " <interface name=\"org.freedesktop.systemd1.Timer\">\n"        \
  31         "  <property name=\"Unit\" type=\"s\" access=\"read\"/>\n"      \
  32         "  <property name=\"Timers\" type=\"a(stt)\" access=\"read\"/>\n" \
  33         "  <property name=\"NextElapseUSec\" type=\"t\" access=\"read\"/>\n" \
  34         " </interface>\n"
  35
  36 #define INTROSPECTION                                                   \
  37         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  38         "<node>\n"                                                      \
  39         BUS_UNIT_INTERFACE                                              \
  40         BUS_TIMER_INTERFACE                                             \
  41         BUS_PROPERTIES_INTERFACE                                        \
  42         BUS_PEER_INTERFACE                                              \
  43         BUS_INTROSPECTABLE_INTERFACE                                    \
  44         "</node>\n"
  45
  46 #define INTERFACES_LIST                              \
  47         BUS_UNIT_INTERFACES_LIST                     \
  48         "org.freedesktop.systemd1.Timer\0"
  49
  50 const char bus_timer_interface[] _introspect_("Timer") = BUS_TIMER_INTERFACE;
  51
  52 const char bus_timer_invalidating_properties[] =
  53         "Timers\0"
  54         "NextElapseUSec\0";
  55
  56 static int bus_timer_append_timers(DBusMessageIter *i, const char *property, void *data) {
  57         Timer *p = data;
  58         DBusMessageIter sub, sub2;
  59         TimerValue *k;
  60
  61         assert(i);
  62         assert(property);
  63         assert(p);
  64
  65         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(stt)", &sub))
  66                 return -ENOMEM;
  67
  68         LIST_FOREACH(value, k, p->values) {
  69                 char *buf;
  70                 const char *t;
  71                 size_t l;
  72                 bool b;
  73
  74                 t = timer_base_to_string(k->base);
  75                 assert(endswith(t, "Sec"));
  76
  77                 /* s/Sec/USec/ */
  78                 l = strlen(t);
  79                 if (!(buf = new(char, l+2)))
  80                         return -ENOMEM;
  81
  82                 memcpy(buf, t, l-3);
  83                 memcpy(buf+l-3, "USec", 5);
  84
  85                 b = dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) &&
  86                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &buf) &&
  87                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->value) &&
  88                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->next_elapse) &&
  89                         dbus_message_iter_close_container(&sub, &sub2);
  90
  91                 free(buf);
  92                 if (!b)
  93                         return -ENOMEM;
  94         }
  95
  96         if (!dbus_message_iter_close_container(i, &sub))
  97                 return -ENOMEM;
  98
  99         return 0;
 100 }
 101
 102 static int bus_timer_append_unit(DBusMessageIter *i, const char *property, void *data) {
 103         Unit *u = data;
 104         const char *t;
 105
 106         assert(i);
 107         assert(property);
 108         assert(u);
 109
 110         t = u->timer.unit ? u->timer.unit->meta.id : "";
 111
 112         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
 113 }
 114
 115 DBusHandlerResult bus_timer_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 116         const BusProperty properties[] = {
 117                 BUS_UNIT_PROPERTIES,
 118                 { "org.freedesktop.systemd1.Timer", "Unit",           bus_timer_append_unit,      "s",      u                      },
 119                 { "org.freedesktop.systemd1.Timer", "Timers",         bus_timer_append_timers,    "a(stt)", u                      },
 120                 { "org.freedesktop.systemd1.Timer", "NextElapseUSec", bus_property_append_usec,   "t",      &u->timer.next_elapse  },
 121                 { NULL, NULL, NULL, NULL, NULL }
 122         };
 123
 124         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, properties);
 125 }