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 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-path.h"
  26 #include "dbus-execute.h"
  27 #include "dbus-common.h"
  28 #include "selinux-access.h"
  29
  30 #define BUS_PATH_INTERFACE                                              \
  31         " <interface name=\"org.freedesktop.systemd1.Path\">\n"         \
  32         "  <property name=\"Unit\" type=\"s\" access=\"read\"/>\n"      \
  33         "  <property name=\"Paths\" type=\"a(ss)\" access=\"read\"/>\n" \
  34         "  <property name=\"MakeDirectory\" type=\"b\" access=\"read\"/>\n" \
  35         "  <property name=\"DirectoryMode\" type=\"u\" access=\"read\"/>\n" \
  36         "  <property name=\"Result\" type=\"s\" access=\"read\"/>\n"    \
  37         " </interface>\n"
  38
  39 #define INTROSPECTION                                                   \
  40         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  41         "<node>\n"                                                      \
  42         BUS_UNIT_INTERFACE                                              \
  43         BUS_PATH_INTERFACE                                              \
  44         BUS_PROPERTIES_INTERFACE                                        \
  45         BUS_PEER_INTERFACE                                              \
  46         BUS_INTROSPECTABLE_INTERFACE                                    \
  47         "</node>\n"
  48
  49 #define INTERFACES_LIST                              \
  50         BUS_UNIT_INTERFACES_LIST                     \
  51         "org.freedesktop.systemd1.Path\0"
  52
  53 const char bus_path_interface[] _introspect_("Path") = BUS_PATH_INTERFACE;
  54
  55 const char bus_path_invalidating_properties[] =
  56         "Result\0";
  57
  58 static int bus_path_append_paths(DBusMessageIter *i, const char *property, void *data) {
  59         Path *p = data;
  60         DBusMessageIter sub, sub2;
  61         PathSpec *k;
  62
  63         assert(i);
  64         assert(property);
  65         assert(p);
  66
  67         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(ss)", &sub))
  68                 return -ENOMEM;
  69
  70         LIST_FOREACH(spec, k, p->specs) {
  71                 const char *t = path_type_to_string(k->type);
  72
  73                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
  74                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &t) ||
  75                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &k->path) ||
  76                     !dbus_message_iter_close_container(&sub, &sub2))
  77                         return -ENOMEM;
  78         }
  79
  80         if (!dbus_message_iter_close_container(i, &sub))
  81                 return -ENOMEM;
  82
  83         return 0;
  84 }
  85
  86 static int bus_path_append_unit(DBusMessageIter *i, const char *property, void *data) {
  87         Unit *u = data, *trigger;
  88         const char *t;
  89
  90         assert(i);
  91         assert(property);
  92         assert(u);
  93
  94         trigger = UNIT_TRIGGER(u);
  95         t = trigger ? trigger->id : "";
  96
  97         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
  98 }
  99
 100 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_path_append_path_result, path_result, PathResult);
 101
 102 static const BusProperty bus_path_properties[] = {
 103         { "Unit",          bus_path_append_unit,      "s", 0 },
 104         { "Paths",         bus_path_append_paths, "a(ss)", 0 },
 105         { "MakeDirectory", bus_property_append_bool,  "b", offsetof(Path, make_directory) },
 106         { "DirectoryMode", bus_property_append_mode,  "u", offsetof(Path, directory_mode) },
 107         { "Result",        bus_path_append_path_result, "s", offsetof(Path, result) },
 108         { NULL, }
 109 };
 110
 111 DBusHandlerResult bus_path_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 112         Path *p = PATH(u);
 113         const BusBoundProperties bps[] = {
 114                 { "org.freedesktop.systemd1.Unit", bus_unit_properties, u },
 115                 { "org.freedesktop.systemd1.Path", bus_path_properties, p },
 116                 { NULL, }
 117         };
 118
 119         SELINUX_UNIT_ACCESS_CHECK(u, c, message, "status");
 120
 121         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, bps);
 122 }