src/dbus-swap.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   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 static const char introspection[] =
  29         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
  30         "<node>"
  31         BUS_UNIT_INTERFACE
  32         BUS_PROPERTIES_INTERFACE
  33         " <interface name=\"org.freedesktop.systemd1.Swap\">"
  34         "  <property name=\"What\" type=\"s\" access=\"read\"/>"
  35         "  <property name=\"Priority\" type=\"i\" access=\"read\"/>"
  36         " </interface>"
  37         BUS_INTROSPECTABLE_INTERFACE
  38         "</node>";
  39
  40 static int bus_swap_append_priority(Manager *m, DBusMessageIter *i, const char *property, void *data) {
  41         Swap *s = data;
  42         dbus_int32_t j;
  43
  44         assert(m);
  45         assert(i);
  46         assert(property);
  47         assert(s);
  48
  49         if (s->from_proc_swaps)
  50                 j = s->parameters_proc_swaps.priority;
  51         else if (s->from_fragment)
  52                 j = s->parameters_fragment.priority;
  53         else if (s->from_etc_fstab)
  54                 j = s->parameters_etc_fstab.priority;
  55         else
  56                 j = -1;
  57
  58         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &j))
  59                 return -ENOMEM;
  60
  61         return 0;
  62 }
  63
  64 DBusHandlerResult bus_swap_message_handler(Unit *u, DBusMessage *message) {
  65         const BusProperty properties[] = {
  66                 BUS_UNIT_PROPERTIES,
  67                 { "org.freedesktop.systemd1.Swap", "What",     bus_property_append_string, "s", u->swap.what },
  68                 { "org.freedesktop.systemd1.Swap", "Priority", bus_swap_append_priority,   "i", u            },
  69                 { NULL, NULL, NULL, NULL, NULL }
  70         };
  71
  72         return bus_default_message_handler(u->meta.manager, message, introspection, properties);
  73 }