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                 _cleanup_free_ char *buf = NULL;
  73                 const char *t;
  74                 size_t l;
  75                 bool b;
  76
  77                 t = timer_base_to_string(k->base);
  78
  79                 if (endswith(t, "Sec")) {
  80
  81                         /* s/Sec/USec/ */
  82                         l = strlen(t);
  83                         buf = new(char, l+2);
  84                         if (!buf)
  85                                 return -ENOMEM;
  86
  87                         memcpy(buf, t, l-3);
  88                         memcpy(buf+l-3, "USec", 5);
  89                 } else {
  90                         buf = strdup(t);
  91                         if (!buf)
  92                                 return -ENOMEM;
  93                 }
  94
  95                 b = dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) &&
  96                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &buf) &&
  97                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->value) &&
  98                         dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &k->next_elapse) &&
  99                         dbus_message_iter_close_container(&sub, &sub2);
 100
 101                 if (!b)
 102                         return -ENOMEM;
 103         }
 104
 105         if (!dbus_message_iter_close_container(i, &sub))
 106                 return -ENOMEM;
 107
 108         return 0;
 109 }
 110
 111 static int bus_timer_append_unit(DBusMessageIter *i, const char *property, void *data) {
 112         Unit *u = data;
 113         Timer *timer = TIMER(u);
 114         const char *t;
 115
 116         assert(i);
 117         assert(property);
 118         assert(u);
 119
 120         t = UNIT_DEREF(timer->unit) ? UNIT_DEREF(timer->unit)->id : "";
 121
 122         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
 123 }
 124
 125 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_timer_append_timer_result, timer_result, TimerResult);
 126
 127 static const BusProperty bus_timer_properties[] = {
 128         { "Unit",           bus_timer_append_unit,        "s", 0 },
 129         { "Timers",         bus_timer_append_timers, "a(stt)", 0 },
 130         { "NextElapseUSec", bus_property_append_usec,     "t", offsetof(Timer, next_elapse_monotonic) },
 131         { "NextElapseUSecRealtime", bus_property_append_usec, "t", offsetof(Timer, next_elapse_realtime) },
 132         { "Result",         bus_timer_append_timer_result,"s", offsetof(Timer, result)      },
 133         { NULL, }
 134 };
 135
 136 DBusHandlerResult bus_timer_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 137         Timer *t = TIMER(u);
 138         const BusBoundProperties bps[] = {
 139                 { "org.freedesktop.systemd1.Unit",  bus_unit_properties,  u },
 140                 { "org.freedesktop.systemd1.Timer", bus_timer_properties, t },
 141                 { NULL, }
 142         };
 143
 144         SELINUX_UNIT_ACCESS_CHECK(u, c, message, "status");
 145
 146         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, bps);
 147 }