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[] = BUS_TIMER_INTERFACE;
  46
  47 const char bus_timer_invalidating_properties[] =
  48         "Timers\0"
  49         "NextElapseUSec\0"
  50         "\0";
  51
  52 static int bus_timer_append_timers(Manager *m, DBusMessageIter *i, const char *property, void *data) {
  53         Timer *p = data;
  54         DBusMessageIter sub, sub2;
  55         TimerValue *k;
  56
  57         assert(m);
  58         assert(i);
  59         assert(property);
  60         assert(p);
  61
  62         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(stt)", &sub))
  63                 return -ENOMEM;
  64
  65         LIST_FOREACH(value, k, p->values) {
  66                 char *buf;
  67                 const char *t;
  68                 size_t l;
  69                 bool b;
  70
  71                 t = timer_base_to_string(k->base);
  72                 assert(endswith(t, "Sec"));
  73
  74                 /* s/Sec/USec/ */
  75                 l = strlen(t);
  76                 if (!(buf = new(char, l+2)))
  77                         return -ENOMEM;
  78
  79                 memcpy(buf, t, l-3);
  80                 memcpy(buf+l-3, "USec", 5);
  81
  82                 b = dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) &&
  83                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &buf) &&
  84                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->value) &&
  85                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->next_elapse) &&
  86                         dbus_message_iter_close_container(&sub, &sub2);
  87
  88                 free(buf);
  89                 if (!b)
  90                         return -ENOMEM;
  91         }
  92
  93         if (!dbus_message_iter_close_container(i, &sub))
  94                 return -ENOMEM;
  95
  96         return 0;
  97 }
  98
  99 DBusHandlerResult bus_timer_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 100         const BusProperty properties[] = {
 101                 BUS_UNIT_PROPERTIES,
 102                 { "org.freedesktop.systemd1.Timer", "Unit",           bus_property_append_string, "s",      u->timer.unit->meta.id },
 103                 { "org.freedesktop.systemd1.Timer", "Timers",         bus_timer_append_timers,    "a(stt)", u                      },
 104                 { "org.freedesktop.systemd1.Timer", "NextElapseUSec", bus_property_append_usec,   "t",      &u->timer.next_elapse  },
 105                 { NULL, NULL, NULL, NULL, NULL }
 106         };
 107
 108         return bus_default_message_handler(u->meta.manager, c, message, INTROSPECTION, properties);
 109 }