src/dbus-swap.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   Copyright 2010 Maarten Lankhorst
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; either version 2 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <errno.h>
  24
  25 #include "dbus-unit.h"
  26 #include "dbus-swap.h"
  27
  28 #define BUS_SWAP_INTERFACE                                              \
  29         " <interface name=\"org.freedesktop.systemd1.Swap\">\n"         \
  30         "  <property name=\"What\" type=\"s\" access=\"read\"/>\n"      \
  31         "  <property name=\"Priority\" type=\"i\" access=\"read\"/>\n"  \
  32         " </interface>\n"
  33
  34 #define INTROSPECTION                                                   \
  35         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  36         "<node>\n"                                                      \
  37         BUS_UNIT_INTERFACE                                              \
  38         BUS_SWAP_INTERFACE                                              \
  39         BUS_PROPERTIES_INTERFACE                                        \
  40         BUS_PEER_INTERFACE                                              \
  41         BUS_INTROSPECTABLE_INTERFACE                                    \
  42         "</node>\n"
  43
  44 const char bus_swap_interface[] = BUS_SWAP_INTERFACE;
  45
  46 const char bus_swap_invalidating_properties[] =
  47         "What\0"
  48         "Priority\0"
  49         "\0";
  50
  51 static int bus_swap_append_priority(Manager *m, DBusMessageIter *i, const char *property, void *data) {
  52         Swap *s = data;
  53         dbus_int32_t j;
  54
  55         assert(m);
  56         assert(i);
  57         assert(property);
  58         assert(s);
  59
  60         if (s->from_proc_swaps)
  61                 j = s->parameters_proc_swaps.priority;
  62         else if (s->from_fragment)
  63                 j = s->parameters_fragment.priority;
  64         else if (s->from_etc_fstab)
  65                 j = s->parameters_etc_fstab.priority;
  66         else
  67                 j = -1;
  68
  69         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &j))
  70                 return -ENOMEM;
  71
  72         return 0;
  73 }
  74
  75 DBusHandlerResult bus_swap_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
  76         const BusProperty properties[] = {
  77                 BUS_UNIT_PROPERTIES,
  78                 { "org.freedesktop.systemd1.Swap", "What",     bus_property_append_string, "s", u->swap.what },
  79                 { "org.freedesktop.systemd1.Swap", "Priority", bus_swap_append_priority,   "i", u            },
  80                 { NULL, NULL, NULL, NULL, NULL }
  81         };
  82
  83         return bus_default_message_handler(u->meta.manager, c, message, INTROSPECTION, properties);
  84 }