src/core/dbus-path.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 General Public License as published by
  10   the Free Software Foundation; either version 2 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   General Public License for more details.
  17
  18   You should have received a copy of the GNU 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-path.h"
  26 #include "dbus-execute.h"
  27 #include "dbus-common.h"
  28
  29 #define BUS_PATH_INTERFACE                                              \
  30         " <interface name=\"org.freedesktop.systemd1.Path\">\n"         \
  31         "  <property name=\"Unit\" type=\"s\" access=\"read\"/>\n"      \
  32         "  <property name=\"Paths\" type=\"a(ss)\" access=\"read\"/>\n" \
  33         "  <property name=\"MakeDirectory\" type=\"b\" access=\"read\"/>\n" \
  34         "  <property name=\"DirectoryMode\" type=\"u\" 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_PATH_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.Path\0"
  51
  52 const char bus_path_interface[] _introspect_("Path") = BUS_PATH_INTERFACE;
  53
  54 const char bus_path_invalidating_properties[] =
  55         "Result\0";
  56
  57 static int bus_path_append_paths(DBusMessageIter *i, const char *property, void *data) {
  58         Path *p = data;
  59         DBusMessageIter sub, sub2;
  60         PathSpec *k;
  61
  62         assert(i);
  63         assert(property);
  64         assert(p);
  65
  66         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(ss)", &sub))
  67                 return -ENOMEM;
  68
  69         LIST_FOREACH(spec, k, p->specs) {
  70                 const char *t = path_type_to_string(k->type);
  71
  72                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
  73                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &t) ||
  74                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &k->path) ||
  75                     !dbus_message_iter_close_container(&sub, &sub2))
  76                         return -ENOMEM;
  77         }
  78
  79         if (!dbus_message_iter_close_container(i, &sub))
  80                 return -ENOMEM;
  81
  82         return 0;
  83 }
  84
  85 static int bus_path_append_unit(DBusMessageIter *i, const char *property, void *data) {
  86         Unit *u = data;
  87         Path *p = PATH(u);
  88         const char *t;
  89
  90         assert(i);
  91         assert(property);
  92         assert(u);
  93
  94         t = UNIT_DEREF(p->unit) ? UNIT_DEREF(p->unit)->id : "";
  95
  96         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
  97 }
  98
  99 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_path_append_path_result, path_result, PathResult);
 100
 101 static const BusProperty bus_path_properties[] = {
 102         { "Unit",          bus_path_append_unit,      "s", 0 },
 103         { "Paths",         bus_path_append_paths, "a(ss)", 0 },
 104         { "MakeDirectory", bus_property_append_bool,  "b", offsetof(Path, make_directory) },
 105         { "DirectoryMode", bus_property_append_mode,  "u", offsetof(Path, directory_mode) },
 106         { "Result",        bus_path_append_path_result, "s", offsetof(Path, result) },
 107         { NULL, }
 108 };
 109
 110 DBusHandlerResult bus_path_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 111         Path *p = PATH(u);
 112         const BusBoundProperties bps[] = {
 113                 { "org.freedesktop.systemd1.Unit", bus_unit_properties, u },
 114                 { "org.freedesktop.systemd1.Path", bus_path_properties, p },
 115                 { NULL, }
 116         };
 117
 118         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, bps);
 119 }