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