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         "  <property name=\"Result\" type=\"s\" access=\"read\"/>\n"    \
  35         " </interface>\n"
  36
  37 #define INTROSPECTION                                                   \
  38         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  39         "<node>\n"                                                      \
  40         BUS_UNIT_INTERFACE                                              \
  41         BUS_TIMER_INTERFACE                                             \
  42         BUS_PROPERTIES_INTERFACE                                        \
  43         BUS_PEER_INTERFACE                                              \
  44         BUS_INTROSPECTABLE_INTERFACE                                    \
  45         "</node>\n"
  46
  47 #define INTERFACES_LIST                              \
  48         BUS_UNIT_INTERFACES_LIST                     \
  49         "org.freedesktop.systemd1.Timer\0"
  50
  51 const char bus_timer_interface[] _introspect_("Timer") = BUS_TIMER_INTERFACE;
  52
  53 const char bus_timer_invalidating_properties[] =
  54         "Timers\0"
  55         "NextElapseUSec\0"
  56         "Result\0";
  57
  58 static int bus_timer_append_timers(DBusMessageIter *i, const char *property, void *data) {
  59         Timer *p = data;
  60         DBusMessageIter sub, sub2;
  61         TimerValue *k;
  62
  63         assert(i);
  64         assert(property);
  65         assert(p);
  66
  67         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(stt)", &sub))
  68                 return -ENOMEM;
  69
  70         LIST_FOREACH(value, k, p->values) {
  71                 char *buf;
  72                 const char *t;
  73                 size_t l;
  74                 bool b;
  75
  76                 t = timer_base_to_string(k->base);
  77                 assert(endswith(t, "Sec"));
  78
  79                 /* s/Sec/USec/ */
  80                 l = strlen(t);
  81                 if (!(buf = new(char, l+2)))
  82                         return -ENOMEM;
  83
  84                 memcpy(buf, t, l-3);
  85                 memcpy(buf+l-3, "USec", 5);
  86
  87                 b = dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) &&
  88                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &buf) &&
  89                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->value) &&
  90                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->next_elapse) &&
  91                         dbus_message_iter_close_container(&sub, &sub2);
  92
  93                 free(buf);
  94                 if (!b)
  95                         return -ENOMEM;
  96         }
  97
  98         if (!dbus_message_iter_close_container(i, &sub))
  99                 return -ENOMEM;
 100
 101         return 0;
 102 }
 103
 104 static int bus_timer_append_unit(DBusMessageIter *i, const char *property, void *data) {
 105         Unit *u = data;
 106         Timer *timer = TIMER(u);
 107         const char *t;
 108
 109         assert(i);
 110         assert(property);
 111         assert(u);
 112
 113         t = UNIT_DEREF(timer->unit) ? UNIT_DEREF(timer->unit)->id : "";
 114
 115         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
 116 }
 117
 118 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_timer_append_timer_result, timer_result, TimerResult);
 119
 120 static const BusProperty bus_timer_properties[] = {
 121         { "Unit",           bus_timer_append_unit,        "s", 0 },
 122         { "Timers",         bus_timer_append_timers, "a(stt)", 0 },
 123         { "NextElapseUSec", bus_property_append_usec,     "t", offsetof(Timer, next_elapse) },
 124         { "Result",         bus_timer_append_timer_result,"s", offsetof(Timer, result)      },
 125         { NULL, }
 126 };
 127
 128 DBusHandlerResult bus_timer_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 129         Timer *t = TIMER(u);
 130         const BusBoundProperties bps[] = {
 131                 { "org.freedesktop.systemd1.Unit",  bus_unit_properties,  u },
 132                 { "org.freedesktop.systemd1.Timer", bus_timer_properties, t },
 133                 { NULL, }
 134         };
 135
 136         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, bps);
 137 }