src/core/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 Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 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   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser 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 #include "selinux-access.h"
  29
  30 #define BUS_TIMER_INTERFACE                                             \
  31         " <interface name=\"org.freedesktop.systemd1.Timer\">\n"        \
  32         "  <property name=\"Unit\" type=\"s\" access=\"read\"/>\n"      \
  33         "  <property name=\"Timers\" type=\"a(stt)\" access=\"read\"/>\n" \
  34         "  <property name=\"NextElapseUSec\" type=\"t\" access=\"read\"/>\n" \
  35         "  <property name=\"Result\" type=\"s\" access=\"read\"/>\n"    \
  36         " </interface>\n"
  37
  38 #define INTROSPECTION                                                   \
  39         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  40         "<node>\n"                                                      \
  41         BUS_UNIT_INTERFACE                                              \
  42         BUS_TIMER_INTERFACE                                             \
  43         BUS_PROPERTIES_INTERFACE                                        \
  44         BUS_PEER_INTERFACE                                              \
  45         BUS_INTROSPECTABLE_INTERFACE                                    \
  46         "</node>\n"
  47
  48 #define INTERFACES_LIST                              \
  49         BUS_UNIT_INTERFACES_LIST                     \
  50         "org.freedesktop.systemd1.Timer\0"
  51
  52 const char bus_timer_interface[] _introspect_("Timer") = BUS_TIMER_INTERFACE;
  53
  54 const char bus_timer_invalidating_properties[] =
  55         "Timers\0"
  56         "NextElapseUSec\0"
  57         "Result\0";
  58
  59 static int bus_timer_append_timers(DBusMessageIter *i, const char *property, void *data) {
  60         Timer *p = data;
  61         DBusMessageIter sub, sub2;
  62         TimerValue *k;
  63
  64         assert(i);
  65         assert(property);
  66         assert(p);
  67
  68         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(stt)", &sub))
  69                 return -ENOMEM;
  70
  71         LIST_FOREACH(value, k, p->values) {
  72                 char *buf;
  73                 const char *t;
  74                 size_t l;
  75                 bool b;
  76
  77                 t = timer_base_to_string(k->base);
  78                 assert(endswith(t, "Sec"));
  79
  80                 /* s/Sec/USec/ */
  81                 l = strlen(t);
  82                 buf = new(char, l+2);
  83                 if (!buf)
  84                         return -ENOMEM;
  85
  86                 memcpy(buf, t, l-3);
  87                 memcpy(buf+l-3, "USec", 5);
  88
  89                 b = dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) &&
  90                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &buf) &&
  91                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->value) &&
  92                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->next_elapse) &&
  93                         dbus_message_iter_close_container(&sub, &sub2);
  94
  95                 free(buf);
  96                 if (!b)
  97                         return -ENOMEM;
  98         }
  99
 100         if (!dbus_message_iter_close_container(i, &sub))
 101                 return -ENOMEM;
 102
 103         return 0;
 104 }
 105
 106 static int bus_timer_append_unit(DBusMessageIter *i, const char *property, void *data) {
 107         Unit *u = data;
 108         Timer *timer = TIMER(u);
 109         const char *t;
 110
 111         assert(i);
 112         assert(property);
 113         assert(u);
 114
 115         t = UNIT_DEREF(timer->unit) ? UNIT_DEREF(timer->unit)->id : "";
 116
 117         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
 118 }
 119
 120 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_timer_append_timer_result, timer_result, TimerResult);
 121
 122 static const BusProperty bus_timer_properties[] = {
 123         { "Unit",           bus_timer_append_unit,        "s", 0 },
 124         { "Timers",         bus_timer_append_timers, "a(stt)", 0 },
 125         { "NextElapseUSec", bus_property_append_usec,     "t", offsetof(Timer, next_elapse_monotonic) },
 126         { "NextElapseUSecRealtime", bus_property_append_usec, "t", offsetof(Timer, next_elapse_realtime) },
 127         { "Result",         bus_timer_append_timer_result,"s", offsetof(Timer, result)      },
 128         { NULL, }
 129 };
 130
 131 DBusHandlerResult bus_timer_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 132         Timer *t = TIMER(u);
 133         const BusBoundProperties bps[] = {
 134                 { "org.freedesktop.systemd1.Unit",  bus_unit_properties,  u },
 135                 { "org.freedesktop.systemd1.Timer", bus_timer_properties, t },
 136                 { NULL, }
 137         };
 138
 139         SELINUX_UNIT_ACCESS_CHECK(u, c, message, "status");
 140
 141         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, bps);
 142 }