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 #include "dbus-execute.h"
  28 #include "dbus-common.h"
  29
  30 #define BUS_SWAP_INTERFACE                                              \
  31         " <interface name=\"org.freedesktop.systemd1.Swap\">\n"         \
  32         "  <property name=\"What\" type=\"s\" access=\"read\"/>\n"      \
  33         "  <property name=\"Priority\" type=\"i\" access=\"read\"/>\n"  \
  34         "  <property name=\"TimeoutUSec\" type=\"t\" access=\"read\"/>\n" \
  35         BUS_EXEC_COMMAND_INTERFACE("ExecActivate")                      \
  36         BUS_EXEC_COMMAND_INTERFACE("ExecDeactivate")                    \
  37         BUS_EXEC_CONTEXT_INTERFACE                                      \
  38         "  <property name=\"ControlPID\" type=\"u\" access=\"read\"/>\n" \
  39         " </interface>\n"
  40
  41 #define INTROSPECTION                                                   \
  42         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  43         "<node>\n"                                                      \
  44         BUS_UNIT_INTERFACE                                              \
  45         BUS_SWAP_INTERFACE                                              \
  46         BUS_PROPERTIES_INTERFACE                                        \
  47         BUS_PEER_INTERFACE                                              \
  48         BUS_INTROSPECTABLE_INTERFACE                                    \
  49         "</node>\n"
  50
  51 #define INTERFACES_LIST                              \
  52         BUS_UNIT_INTERFACES_LIST                     \
  53         "org.freedesktop.systemd1.Swap\0"
  54
  55 const char bus_swap_interface[] _introspect_("Swap") = BUS_SWAP_INTERFACE;
  56
  57 const char bus_swap_invalidating_properties[] =
  58         "What\0"
  59         "Priority\0"
  60         "ExecActivate\0"
  61         "ExecDeactivate\0"
  62         "ControlPID\0";
  63
  64 static int bus_swap_append_priority(DBusMessageIter *i, const char *property, void *data) {
  65         Swap *s = data;
  66         dbus_int32_t j;
  67
  68         assert(i);
  69         assert(property);
  70         assert(s);
  71
  72         if (s->from_proc_swaps)
  73                 j = s->parameters_proc_swaps.priority;
  74         else if (s->from_fragment)
  75                 j = s->parameters_fragment.priority;
  76         else if (s->from_etc_fstab)
  77                 j = s->parameters_etc_fstab.priority;
  78         else
  79                 j = -1;
  80
  81         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &j))
  82                 return -ENOMEM;
  83
  84         return 0;
  85 }
  86
  87 static const BusProperty bus_swap_properties[] = {
  88         { "What",       bus_property_append_string, "s", offsetof(Swap, what),  true },
  89         { "Priority",   bus_swap_append_priority,   "i", 0 },
  90         BUS_EXEC_COMMAND_PROPERTY("ExecActivate",   offsetof(Swap, exec_command[SWAP_EXEC_ACTIVATE]),   false),
  91         BUS_EXEC_COMMAND_PROPERTY("ExecDeactivate", offsetof(Swap, exec_command[SWAP_EXEC_DEACTIVATE]), false),
  92         { "ControlPID", bus_property_append_pid,    "u", offsetof(Swap, control_pid) },
  93         { NULL, }
  94 };
  95
  96 DBusHandlerResult bus_swap_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
  97         Swap *s = SWAP(u);
  98         const BusBoundProperties bps[] = {
  99                 { "org.freedesktop.systemd1.Unit", bus_unit_properties,         u },
 100                 { "org.freedesktop.systemd1.Swap", bus_swap_properties,         s },
 101                 { "org.freedesktop.systemd1.Swap", bus_exec_context_properties, &s->exec_context },
 102                 { NULL, }
 103         };
 104
 105         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, bps);
 106 }